JP5370175B2 - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To output a double speed image and a 3-dimensional (3D) image by switching them without enlarging a device structure in scale. <P>SOLUTION: An image display device includes: a motion vector detection section 13 for detecting a motion vector; an interpolation frame creating section 14 for creating an interpolation frame signal; a pattern detection section 15 for detecting a signal pattern; a shift amount determination section 16 for determining a shift amount; a shift register 17 for storing a shift image signal; a mode selection determination section 22a for determining which of a double speed mode or a 2D/3D mode is selected; a frame memory 19; and a selection processing section 18 in which one or more interpolation signals are stored in a frame memory when the double speed mode is selected so as to be outputted between a first frame image signal and a second image signal, and when the 2D/3D mode is selected, a shift image signal is stored in the frame memory so that the first frame image signal and the shift image signal may be alternately outputted. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an image display apparatus that switches and outputs an image to be displayed at a double frame rate and a stereoscopic (3D) image.

  There has been proposed an image display device that generates an interpolated frame signal from previous and subsequent frame image signals based on a motion vector, and executes processing for displaying video at double speed (hereinafter referred to as double speed processing) using the interpolated frame signal (for example, Patent Document 1).

  In addition, a method for executing a process (hereinafter referred to as a 2D / 3D process) for converting a planar video signal (2D (Dimensions) video signal) into a stereoscopic video signal (3D video signal) and displaying the same (for example, 2D / 3D processing) has been proposed (for example, Patent Document 2).

JP 2006-91412 A Japanese Patent Laid-Open No. 9-116929

  In the image display device for double-speed display described in Patent Document 1, it is necessary to generate an interpolated frame signal from the preceding and following frame image signals in order to execute the double-speed processing. In order to make it finer, a shift register for holding a wide range of interpolation source signals is required. In addition, a frame memory for converting the frame rate and outputting it is also required.

  On the other hand, in the method described in Patent Document 2, in order to execute 2D / 3D processing, one or both of the left and right images are shifted in order to give parallax to the left-eye image and the right-eye image. Therefore, a shift register for storing the shifted image is required. In addition, a frame memory for outputting an image after 2D / 3D processing is also required.

  Therefore, if the double speed processing and the 2D / 3D processing are made independent and compatible, it is necessary to provide a shift register, a frame memory, etc. corresponding to each processing, and the apparatus configuration becomes large-scale. .

  The present invention has been made in view of the above-described problems, and an object of the present invention is to display an image (double-speed image) at a double frame rate by inserting an interpolation frame without making the apparatus configuration large-scale. It is to provide an image display device that switches and outputs 3D images.

In order to achieve the above object, the first feature of the image display device according to the present invention is that the input first frame image signal is stored and the second frame image signal delayed by one frame period is output. A motion vector detecting means for detecting a motion vector based on a difference between the first frame image signal, the first frame image signal, and the second frame image signal; a motion vector detected by the motion vector detecting means; Between the first frame image signal and the second frame image signal in time series based on at least one of the first frame image signal and the second frame image signal. Interpolating frame generating means for generating one or more interpolated frame signals that are image signals of the image, and detecting characteristics of the first frame image signal as signal patterns And pattern detecting means, based on a signal pattern detected by said pattern detecting means, and the shift amount determining means for determining the amount of shifting the first frame image signals for displaying a stereoscopic image, the shift amount determination Based on an external input, a shift register that shifts the first frame image signal in at least one of the main scanning direction or the sub-scanning direction and stores it as a shifted image signal according to the shift amount determined by the means, Mode selection for determining which of a double speed mode for outputting a frame rate of the first frame image signal at a double speed and a 2D / 3D mode for converting the first frame image signal into a stereoscopic image signal and outputting the same A determination means; the one or more interpolated frame signals or the shifted image signal; and the first frame image signal. And the interpolated frame generation between the first frame image signal and the second frame image signal when it is determined that the double speed mode has been selected by the mode selection determining means. The one or more interpolated frame signals are stored in the second frame memory so as to output one or more interpolated frame signals generated by the means, and the 2D / 3D mode is selected by the mode selection determining means. Selection processing means for storing the shift image signal in the second frame memory so as to alternately output the first frame image signal and the shift image signal stored in the shift register when the determination is made. Be prepared.

  In order to achieve the above object, a second feature of the image display device according to the present invention is to store an input first frame image signal and output a second frame image signal delayed by one frame period. 1 frame memory, a motion vector detection means for detecting a motion vector based on a difference between the first frame image signal and the second frame image signal, and a feature of the first frame image signal as a signal pattern A pattern detecting unit for detecting, a shift amount determining unit for determining an amount of shifting the first frame image signal to display a stereoscopic image based on the signal pattern detected by the pattern detecting unit, and an external input Based on the double-speed mode in which the frame rate of the first frame image signal is doubled and output, and the first frame image signal is activated. When it is determined by the mode selection determination means that the 2D / 3D mode to be converted and output to the image signal is selected, and when the mode selection determination means determines that the double speed mode has been selected, the first frame memory Selecting the stored second frame image signal, and selecting the first frame image signal when the mode selection determining means determines that the 2D / 3D mode is selected; When it is determined that the double speed mode is selected by the mode selection determining means, when the motion vector detected by the motion vector detecting means is selected, and when the 2D / 3D mode is determined by the mode selection determining means Second selection processing means for selecting the shift amount determined by the shift amount determination means, and the mode When it is determined by the selection determining means that the double speed mode has been selected, the second frame image signal selected by the first selection processing means and the motion vector selected by the second selection processing means are stored. When it is determined that the 2D / 3D mode is selected by the mode selection determination unit, the first frame image signal selected by the first selection processing unit is set in at least one of the main scanning direction and the sub-scanning direction. A first shift register that shifts and stores it as a shifted image signal; a second shift register that stores the first frame image signal when it is determined that the double-speed mode is selected by the mode selection determining means; When it is determined by the mode selection determining means that the double speed mode has been selected, the motion vector and the first shift register Based on at least one of the second frame image signal stored in the second shift image and the first frame image signal stored in the second shift register in time series. Interpolation frame generation means for generating one or more interpolation frame signals, which are image signals between a signal and the second frame image signal, the one or more interpolation frame signals or the shift image signal, and the first When it is determined that the double-speed mode is selected by the second frame memory that stores the frame image signal and the mode selection determining unit, the first frame image signal and the second frame image signal are between the first frame image signal and the second frame image signal. The one or more interpolation frame signals are output from the second frame so as to output one or more interpolation frame signals generated by the interpolation frame generation means. And the second frame image signal and the shift image signal stored by the first shift register are alternately output when it is determined that the 2D / 3D mode has been selected by the mode selection determination means. And third selection processing means for storing the shifted image signal in the second frame memory.

  In order to achieve the above object, a third feature of the image display device according to the present invention is that, when the first shift register determines that the double speed mode is selected by the mode selection determining means, the first selection is performed. When the second frame image signal selected by the processing means and the motion vector selected by the second selection processing means are stored, and it is determined that the 2D / 3D mode is selected by the mode selection determining means The first frame image signal selected by the first selection processing means is shifted in at least one of the main scanning direction and the sub-scanning direction and stored as a first shifted image signal, and the second shift register When it is determined that the double speed mode is selected by the mode selection determination means, the first frame image signal is stored, and the mode selection determination means If it is determined that the 2D / 3D mode is selected, the supplied first frame image signal is shifted in at least one of the main scanning direction and the sub-scanning direction and stored as the second shifted image signal, and the first The second frame memory stores the one or more interpolated frame signals, or the first shift image signal or the second shift image signal, and the first frame image signal, and the third selection processing means. Is one or more interpolations generated by the interpolation frame generation means between the first frame image signal and the first frame image signal when it is determined that the double speed mode is selected by the mode selection determination means The one or more interpolated frame signals are stored in the second frame memory so as to output a frame signal, and the mode selection determining means If it is determined that the 2D / 3D mode is selected, the first shift image signal stored by the first shift register and the second shift image signal stored by the second shift register are alternately used. When the first shift image signal is stored in the second frame memory so as to be output and it is determined that the double speed mode is selected by the mode selection determination means, the first frame image signal supplied from the outside Are stored in the second frame memory, and when it is determined that the 2D / 3D mode is selected by the mode selection determining means, the first shift image signal stored in the first shift register and the second The second shift image signal is output from the second shift image signal so as to be alternately output from the second shift image signal stored by the shift register. The present invention further includes fourth selection processing means for storing in the second frame memory.

  In order to achieve the above object, a fourth feature of the image display apparatus according to the present invention is that the input first frame image signal is stored and the second frame image signal delayed by one frame period is output. 1 frame memory, a motion vector detection means for detecting a motion vector based on a difference between the first frame image signal and the second frame image signal, and a feature of the first frame image signal as a signal pattern Based on the pattern detection means to be detected and the signal pattern detected by the pattern detection means, a shift amount for shifting the first frame image signal for the left eye and for the right eye in order to display a stereoscopic image is determined. A shift amount determining means; a motion vector detected by the motion vector detecting means; and a left determined by the shift amount determining means. Shift selection means for selecting one of the shift amounts for the right eye and the right eye, and selecting the other shift amount for the left eye and right eye determined by the shift amount determination means, and the shift selection means The second shift is performed by shifting the second frame image signal output from the first frame memory in at least one direction of the main scanning direction or the sub-scanning direction based on the one shift amount selected by A first shift register that stores the motion vector selected by the shift selection unit and stores the image signal as an image signal, and the first shift amount that is input based on the one shift amount selected by the shift selection unit. A first shifted image signal obtained by shifting one frame image signal in at least one of the main scanning direction and the sub-scanning direction; The motion vector selected by the selection unit is stored, and the input first frame image signal in the main scanning direction or the sub-scanning direction based on the other shift amount selected by the shift selection unit. A second shift register for storing a third shift image signal shifted in at least one direction; the motion vector; the second shift image signal stored in the first shift register; and the second shift register. An image between the first shift image signal and the second shift image signal in time series based on at least one of the first shift image signals stored in the shift register. Interpolation frame generation means for generating one or more interpolation frame signals, which are signals, and the one or more interpolation frame signals and the third shift image signal are stored. One or more generated by the interpolation frame generation means between a second frame memory, the third shift image signal, and a fourth shift image signal delayed by one frame period from the third shift image signal Selection processing means for storing the one or more interpolation frame signals in the second frame memory so as to output the interpolation frame signal.

  In order to achieve the above object, according to a fifth feature of the image display apparatus of the present invention, the shift selection means is configured to determine whether one of the second shift image signal and the motion vector is based on an external input. When the maximum storage capacity is determined as the maximum value of the storage area stored in the first shift register, either the second shift image signal or the motion vector so as not to exceed the maximum storage capacity One is to remember one.

  In order to achieve the above object, according to a sixth aspect of the image display device of the present invention, the shift selection unit is configured to determine whether one of the first shift image signal and the motion vector is based on an external input. When the maximum storage capacity is determined as the maximum value of the storage area stored in the second shift register, either the first shift image signal or the motion vector is set so as not to exceed the maximum storage capacity. One is to remember one.

  According to the image display device of the present invention, a double-speed image and a 3D image can be switched and output without making the device configuration large-scale.

1 is a configuration diagram illustrating a configuration of an image display apparatus that is Embodiment 1 of the present invention. It is the flowchart which showed the processing flow of the double speed process by the image display apparatus which is Example 1 of this invention. It is the flowchart which showed the processing flow of 2D / 3D processing by the image display apparatus which is Example 1 of this invention. It is the block diagram which showed the structure of the image display apparatus which is Example 2 of this invention. It is the flowchart which showed the processing flow of the double speed process by the image display apparatus which is Example 2 of this invention. It is the flowchart which showed the processing flow of 2D / 3D processing by the image display apparatus which is Example 2 of this invention. It is the block diagram which showed the structure of the image display apparatus which is Example 3 of this invention. It is the block diagram which showed the structure of the image display apparatus which is Example 4 of this invention. It is the flowchart which showed the processing flow of the double speed 2D / 3D process by the image display apparatus which is Example 4 of this invention. It is the figure which showed typically the memory | storage to the shift register and shift register by the shift selection part in the image display apparatus which is Example 4 of this invention. It is the figure which demonstrated typically the storage area of the shift register with which the image display apparatus which is Example 4 of this invention is provided. It is the block diagram which showed the structure of the image display apparatus which is Example 5 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In the first embodiment of the present invention, an image display apparatus that switches between a double-speed image and a 3D image by sharing a frame memory and outputs a 60 Hz input image signal as a 120 Hz output image signal will be described as an example. .

<Configuration of image display device>
FIG. 1 is a configuration diagram illustrating a configuration of an image display apparatus that is Embodiment 1 of the present invention. In FIG. 1, the flow of the image signal is indicated by a solid line, and the flow of the control signal is indicated by a broken line.

  The image display apparatus 1 includes an input terminal 11, a frame memory 12, a motion vector detection unit 13, an interpolation frame generation unit 14, a pattern detection unit 15, a shift amount determination unit 16, a shift register 17, and a selection process. A unit 18, a frame memory 19, an output terminal 20, a CPU 22, and an operation unit 23 are provided.

  The input terminal 11 is a terminal for inputting a frame image from the outside.

  The frame memory 12 stores the first frame image signal supplied from the input terminal 11 and outputs a second frame image signal delayed by one frame period.

  The motion vector detection unit 13 uses the difference between the second frame image signal, which is the previous frame image signal stored in the frame memory 12, and the first frame image signal newly supplied from the input terminal 11. Detect motion vectors.

  The interpolation frame generation unit 14 includes at least a motion vector detected by the motion vector detection unit 13, a second frame image signal stored in the frame memory 12, and a first frame image signal supplied from the input terminal 11. Based on one frame image signal, an interpolated frame signal that is an intermediate image signal between the first frame image signal and the second frame image signal is generated in time series.

  The pattern detection unit 15 detects the feature of the second frame image signal as a signal pattern.

  Based on the signal pattern detected by the pattern detection unit 15, the shift amount determination unit 16 determines an amount by which the first frame image signal is shifted in order to display a stereoscopic image.

  The shift register 17 shifts the first frame image signal supplied from the input terminal 11 in at least one of the main scanning direction and the sub-scanning direction in accordance with the shift amount determined by the shift amount determination unit 16 to shift image. Store as a signal.

  When the selection processing unit 18 determines that the double speed mode has been selected by the mode selection determination unit 22a, the interpolation frame generated by the interpolation frame generation unit 14 between the first frame image signal and the second frame image signal. The interpolated frame signal is stored in the frame memory 19 so that the signal is output. Note that the double speed mode is a mode in which the frame rate of the input image signal is output at double speed.

  Further, when the selection processing unit 18 determines that the 2D / 3D mode is selected by the mode selection determination unit 22a, the selection processing unit 18 alternately outputs the first frame image signal and the shift image signal stored in the shift register 17. Then, the shift image signal is stored in the frame memory 19. The 2D / 3D mode is a mode in which an input image signal is converted into a stereoscopic image signal and output.

  The frame memory 19 is a memory provided for changing the frame rate (here, 60 Hz → 120 Hz) and outputting an image, and stores an interpolated frame signal or a shifted image signal and a first frame image signal. To do.

  The output terminal 20 is an output terminal for outputting the interpolated frame signal or shift image signal stored in the frame memory 19 and the first frame image signal at 120 Hz.

  The operation unit 23 includes an operation button. When the operation button is pressed by the user, for example, an operation signal for selecting a mode is generated, and the generated operation signal is supplied to the CPU 22.

  The CPU 22 performs central control of the image display device. Specifically, the frame memory 12, the motion vector detection unit 13, the interpolation frame generation unit 14, the pattern detection unit 15, the shift amount determination unit 16, the shift register 17, the selection processing unit 18, The frame memory 19 is controlled. Further, the selection processing unit 18 is switched based on the operation signal supplied from the operation unit 23.

  Further, the CPU 22 includes a mode selection determination unit 22a in terms of its function, and the mode selection determination unit 22a selects either the double speed mode or the 2D / 3D mode based on the operation of the operation unit 23 by the user. It is determined.

<Operation of image display device>
The operation of the image display apparatus 1 that is Embodiment 1 of the present invention will be described.

  The image display device 1 that is Embodiment 1 of the present invention executes either one of the double speed processing and the 2D / 3D processing each time a frame image is supplied from the input terminal 11. Therefore, each process will be described in detail below.

≪Double speed processing≫
The double speed processing by the image display apparatus 1 which is Embodiment 1 of the present invention will be described.

  FIG. 2 is a flowchart showing a processing flow of double speed processing by the image display apparatus 1 according to the first embodiment of the present invention.

  As shown in FIG. 2, when the first frame image signal is supplied from the input terminal 11, the CPU 22 determines whether or not the double speed is selected (step S101). Specifically, it is determined whether or not the double speed mode is set based on the operation of the operation unit 23 by the user.

  If it is determined in step S101 that the double speed is selected (in the case of YES), based on the instruction from the CPU 22, the first frame image signal from the input terminal 11 is at least the frame memory 12, and the motion vector detection unit. 13, the interpolation frame generation unit 14, the pattern detection unit 15, and the frame memory 19 (step S 103).

  Next, the motion vector detection unit 13 includes a second frame image signal that is a frame image signal of the previous frame stored in the frame memory 12, and a first frame image signal newly supplied from the input terminal 11. The motion vector is detected based on the difference between the two (step S105).

  Then, the interpolation frame generation unit 14 is time-series based on the motion vector detected by the motion vector detection unit 13 and at least one frame image signal of the first frame image signal and the second frame image signal. Then, an interpolated frame signal which is an intermediate image signal between the first frame image signal and the second frame image signal is generated (step S107).

  Next, the selection processing unit 18 outputs the interpolation frame signal to the frame memory so as to output the interpolation frame signal generated by the interpolation frame generation unit 14 between the first frame image signal and the second frame image signal. 19 (step S109).

  The CPU 22 sequentially generates the frame memory based on the first frame image signal and the first frame image signal or the second frame image signal that are sequentially supplied from the input terminal 11 and stored in the frame memory 19. The interpolated frame signal stored in 19 is alternately output from the output terminal 20 at 120 (Hz), thereby outputting a double-speed video (step S111).

≪2D / 3D processing≫
The 2D / 3D processing by the image display apparatus 1 that is Embodiment 1 of the present invention will be described.

  FIG. 3 is a flowchart showing a processing flow of 2D / 3D processing by the image display apparatus 1 according to the first embodiment of the present invention.

  As shown in FIG. 3, when the first frame image signal is supplied from the input terminal 11, the CPU 22 determines whether 2D / 3D is selected (step S201). Specifically, it is determined whether the 2D / 3D mode is set based on the operation of the operation unit 23 by the user.

  If it is determined in step S201 that 2D / 3D is selected (in the case of YES), the first frame image signal is shifted from at least the pattern detection unit 15 from the input terminal 11 based on an instruction from the CPU 22. It is supplied to the register 17 and the frame memory 19 (step S203).

  The pattern detection unit 15 detects the feature of the first frame image signal supplied from the input terminal 11 as a signal pattern (step S205). Specifically, the pattern detection unit 15 stores in advance a pattern characterized by a balance of depth and position, and the first frame image signal supplied from the input terminal 11 and the previously stored pattern. Is detected as a signal pattern.

  Based on the signal pattern detected by the pattern detection unit 15, the shift amount determination unit 16 shifts the amount by which the first frame image signal supplied from the input terminal 11 is shifted for the right eye in order to display a stereoscopic image. Determine (step S207).

  The shift amount determination unit 16 supplies the shift amount for the right eye determined in step S207 to the shift register 17 (step S209).

  Based on the supplied shift amount for the right eye, the shift register 17 shifts the first frame image signal supplied from the input terminal 11 in at least one of the main scanning direction and the sub-scanning direction and for the right eye. Are generated (step S211).

  Next, the selection processing unit 18 outputs the shift image signal for the right eye as a frame so as to alternately output the first frame image signal supplied from the input terminal 11 and the shift image signal stored in the shift register 17. It is stored in the memory 19 (step S213).

  Then, the CPU 22 sequentially supplies the first frame image signal supplied from the input terminal 11 and stored in the frame memory 19, and sequentially generates the right frame for the right eye stored in the frame memory 19 based on the first frame image signal. The shift image signal is alternately output from the output terminal 20 at 120 (Hz), thereby outputting a stereoscopic image (step S215).

  As described above, according to the image display apparatus 1 that is Embodiment 1 of the present invention, the frame memory 19 is shared, and double-speed processing or 2D / 3D processing is performed each time a frame image is supplied from the input terminal 11. Since it is executed, it is not necessary to provide the frame memory 19 for each of the double speed processing and 2D / 3D processing. Therefore, a double-speed image and a 3D image can be switched and output without making the apparatus configuration large-scale. In addition, although it demonstrated as a structure which produces | generates the shift image signal for right eyes, what is necessary is just the structure which produces | generates the shift image signal for either one eye, and it is good also as a structure which produces | generates the shift image signal for left eyes. Needless to say.

  In the second embodiment of the present invention, an image display device that switches between a double-speed image and a 3D image by sharing a frame memory and a shift register and outputs a 60 Hz input signal as a 120 Hz output signal is taken as an example. explain.

<Configuration of image display device>
FIG. 4 is a configuration diagram showing a configuration of an image display apparatus 2 that is Embodiment 2 of the present invention. In FIG. 4, the flow of the image signal is indicated by a solid line, and the flow of the control signal is indicated by a broken line.

  The image display device 2 includes an input terminal 11, a frame memory 12, a motion vector detection unit 13, an interpolation frame generation unit 14, a pattern detection unit 15, a shift amount determination unit 16, a frame memory 19, and an output terminal. 20, a CPU 22, an operation unit 23, a selection processing unit 24, a selection processing unit 25, a shift register 26, a shift register 27, a selection processing unit 28, and a selection processing unit 29.

  Here, among the configurations included in the image display device 2 that is Embodiment 2 of the present invention, the input terminal 11, the frame memory 12, the motion vector detection unit 13, the interpolation frame generation unit 14, the pattern detection unit 15, and the like. The shift amount determination unit 16, the frame memory 19, the output terminal 20, the CPU 22, and the operation unit 23 are respectively provided with the same reference numerals provided in the image display device 1 that is Embodiment 1 of the present invention. Since it is the same, description is abbreviate | omitted.

  When the selection processing unit 24 determines that the double speed mode has been selected by the mode selection determination unit 22a, the selection processing unit 24 selects the second frame image signal that is the image signal of the previous frame stored in the frame memory 12 and also selects the mode. When the determination unit 22a determines that the 2D / 3D mode is selected, the first frame image signal supplied from the input terminal 11 is selected.

  When the selection processing unit 25 determines that the double speed mode is selected by the mode selection determination unit 22a, the selection processing unit 25 selects the motion vector detected by the motion vector detection unit 13, and selects the 2D / 3D mode by the mode selection determination unit 22a. If it is determined that the shift amount has been determined, the shift amount determined by the shift amount determination unit 16 is selected.

  The shift register 26 stores the second frame image signal selected by the selection processing unit 24 and the motion vector selected by the selection processing unit 25 when it is determined that the double speed mode has been selected by the mode selection determination unit 22a. When the 2D / 3D mode is determined to be selected by the mode selection determination unit 22a, the first frame image signal selected by the selection processing unit 24 is shifted in at least one of the main scanning direction and the sub-scanning direction to change the first frame image signal. One shift image signal is stored.

  When the shift register 27 determines that the double speed mode has been selected by the mode selection determination unit 22a, the shift register 27 stores the supplied first frame image signal and the motion vector selected by the selection processing unit 25 to determine the mode selection determination. When it is determined that the 2D / 3D mode is selected by the unit 22a, the supplied first frame image signal is shifted in at least one of the main scanning direction and the sub-scanning direction and stored as the second shifted image signal. The motion vector may be stored in at least one of the shift register 26 and the shift register 27.

  When the selection processing unit 29 determines that the double speed mode has been selected by the mode selection determination unit 22a, the interpolation frame generation unit 14 determines the time frame between the first frame image signal and the second frame image signal. The interpolated frame signal is stored in the frame memory 19 so as to output the generated interpolated frame signal, and when the mode selection determining unit 22a determines that the 2D / 3D mode is selected, the shift register 26 stores the second interpolated frame signal. The first shift image signal is stored in the frame memory 19 so that the first shift image signal and the second shift image signal stored in the shift register 27 are alternately output.

  When the selection processing unit 28 determines that the double speed mode has been selected by the mode selection determination unit 22a, the selection processing unit 28 stores the first frame image signal supplied from the input terminal 11 in the frame memory 19 and the mode selection determination unit 22a. If it is determined that the 2D / 3D mode is selected, the second shift image signal stored in the shift register 27 and the second shift image signal stored in the shift register 27 are alternately output. Are stored in the frame memory 19.

<Operation of image display device>
The operation of the image display apparatus 2 that is Embodiment 2 of the present invention will be described.

  The image display device 2 that is Embodiment 2 of the present invention executes either one of the double speed processing and the 2D / 3D processing each time a frame image is supplied from the input terminal 11. Therefore, each process will be described in detail below.

≪Double speed processing≫
The double speed processing by the image display apparatus 2 that is Embodiment 2 of the present invention will be described.

  FIG. 5 is a flowchart showing a processing flow of double speed processing by the image display apparatus 2 which is Embodiment 2 of the present invention.

  As shown in FIG. 5, when the first frame image signal is supplied from the input terminal 11, the CPU 22 determines whether or not the double speed is selected (step S301). Specifically, it is determined whether or not the double speed mode is set based on the operation of the operation unit 23 by the user.

  If it is determined in step S301 that the double speed has been selected (in the case of YES), the first frame image signal supplied from the input terminal 11 moves at least with the frame memory 12 based on an instruction from the CPU 22. The data is supplied to the vector detection unit 13, the pattern detection unit 15, the selection processing unit 24, the shift register 27, and the selection processing unit 28 (step S303).

  Next, the motion vector detection unit 13 includes a second frame image signal that is a frame image signal of the previous frame stored in the frame memory 12, and a first frame image signal newly supplied from the input terminal 11. A motion vector is detected from the difference between the two (step S305).

  Next, the selection processing unit 24 selects a second frame image signal that is a frame image signal of the previous frame stored in the frame memory 12, and sends the selected second frame image signal to the shift register 26. Supply (step S307).

  Then, the selection processing unit 25 selects the motion vector detected by the motion vector detection unit 13, and supplies the selected motion vector to the shift register 26 (step S309).

  Next, the interpolation frame generation unit 14 includes the motion vector stored in the shift register 26, the second frame image signal stored in the shift register 26, and the first frame image signal stored in the shift register 27. Based on at least one of the frame image signals, an interpolated frame signal that is an intermediate image signal between the first frame image signal and the second frame image signal is generated in time series (step S311).

  Then, the selection processing unit 29 is generated by the interpolation frame generation unit 14 so as to output the interpolation frame signal generated by the interpolation frame generation unit 14 between the first frame image signal and the second frame image signal. The interpolated frame signal is stored in the frame memory 19 (step S313).

  The CPU 22 sequentially supplies the first frame image signal and the first frame image signal or the second frame image signal which are supplied from the input terminal 11 and selected by the selection processing unit 28 and stored in the frame memory 19. Are output sequentially from the output terminal 20 at 120 (Hz), and a double-speed video is output.

≪2D / 3D processing≫
The 2D / 3D processing by the image display apparatus 2 that is Embodiment 2 of the present invention will be described.

  FIG. 6 is a flowchart showing a processing flow of 2D / 3D processing by the image display apparatus 2 which is Embodiment 2 of the present invention.

  As shown in FIG. 6, when the first frame image signal is supplied from the input terminal 11, the CPU 22 determines whether 2D / 3D is selected (step S401). Specifically, it is determined whether the 2D / 3D mode is set based on the operation of the operation unit 23 by the user.

  If it is determined in step S401 that 2D / 3D is selected (in the case of YES), at least the first frame image signal supplied from the input terminal 11 based on an instruction from the CPU 22 is at least the pattern detection unit 15. Is supplied to the selection processing unit 24 and the shift register 27 (step S403).

  The pattern detection unit 15 detects the feature of the first frame image signal supplied from the input terminal 11 as a signal pattern (step S405).

  The shift amount determination unit 16 shifts the first frame image signal supplied from the input terminal 11 for the right eye to display a stereoscopic image based on the signal pattern detected by the pattern detection unit 15. The amount to be shifted and the amount to shift for the left eye are determined (step S407).

  The selection processing unit 25 supplies the shift amount for the right eye determined in step S407 to the shift register 26 and supplies the shift amount for the left eye to the shift register 27 (step S409).

  Next, the shift register 26 shifts the first frame image signal selected by the selection processing unit 24 in at least one of the main scanning direction and the sub-scanning direction based on the supplied shift amount for the right eye. Thus, a shift image signal for the right eye is generated as the first shift image signal, and the shift register 27 is supplied with the first frame image supplied from the input terminal 11 based on the supplied shift amount for the left eye. The signal is shifted in at least one of the main scanning direction and the sub-scanning direction to generate a left-eye shifted image signal as the second shifted image signal (step S411).

  Next, the shifted right-eye shift image signal and left-eye shift image signal are stored in the frame memory 19 (step S413). Specifically, the selection processing unit 28 stores the shift image signal for the left eye shifted by the shift register 27 in the frame memory 19, and the selection processing unit 29 for the right eye shifted by the shift register 26. The shifted image signal is stored in the frame memory 19.

  Then, the CPU 22 generates the right-eye shift image signal and the left-eye shift image signal that are sequentially generated based on the first frame image signal and stored in the frame memory 19, and outputs the output terminal at 120 (Hz) alternately. By outputting from 20, a stereoscopic video is output.

  As described above, according to the image display apparatus 2 that is Embodiment 2 of the present invention, the frame image is supplied from the input terminal 11 while sharing the shift register 26, the shift register 27, and the frame memory 19. Since either one of the double speed process and the 2D / 3D process is executed each time, it is necessary to provide the shift register 26, the shift register 27, and the frame memory 19 in each of the double speed process and the 2D / 3D process. Absent. Therefore, the image display apparatus 2 that is Embodiment 2 of the present invention can switch and output a double speed image and a 3D image without making the apparatus configuration large-scale.

  In the image display apparatus 2 according to the second embodiment of the present invention, when it is determined that 2D / 3D is selected, the shift register 26 performs the main scanning direction or sub-scanning with respect to the first frame image signal. A shift image signal for the right eye is generated as the first shift image signal by shifting in at least one of the scan directions, and the shift register 27 is in the main scan direction or the sub scan direction with respect to the first frame image signal. The left-eye shift image signal is generated as the second shift image signal. However, the present invention is not limited to this, and only the shift register 26 converts the right-eye shift image signal as the first shift image signal. You may make it produce | generate.

  In this case, if the frame memory 19 determines that 2D / 3D is selected, the first frame image signal supplied from the input terminal 11 and the right-eye shift image supplied from the selection processing unit 29 are displayed. And the CPU 22 outputs the stereoscopic video by alternately outputting the shift image signal for the right eye and the first frame image signal from the output terminal 20 at 120 (Hz). Good.

  Thereby, the selection process part 28 can be abbreviate | omitted from a structure, and an apparatus structure can be made smaller.

  In the second embodiment of the present invention, an image display device that switches between a double-speed image and a 3D image by sharing a frame memory and a shift register and outputs a 60 Hz input signal as a 120 Hz output signal is taken as an example. However, this is not restrictive.

  In the third embodiment of the present invention, an image display device that switches between a 4 × speed image and a 3D image by sharing a frame memory and a shift register and outputs a 60 Hz input signal as a 240 Hz output signal is taken as an example. I will explain.

<Configuration of image display device>
FIG. 7 is a configuration diagram showing a configuration of an image display apparatus 3 that is Embodiment 3 of the present invention. In FIG. 7, the flow of the image signal is indicated by a solid line, and the flow of the control signal is indicated by a broken line.

  The image display device 3 includes an input terminal 11, a frame memory 12, a motion vector detection unit 13, a pattern detection unit 15, a shift amount determination unit 16, a frame memory 19, an output terminal 20, a CPU 22, and an operation. Unit 23, selection processing unit 24, selection processing unit 25, shift register 26, shift register 27, selection processing unit 28, interpolation frame generation unit 30, and selection processing unit 31.

  Here, among the configurations included in the image display device 3 according to the third embodiment of the present invention, the configurations other than the interpolation frame generation unit 30 and the selection processing unit 31 are the image display devices according to the second embodiment of the present invention. 2 is the same as the configuration provided with the same reference numerals, and the description thereof is omitted.

  The interpolation frame generation unit 30 includes a motion vector, a second frame image signal that is a frame image signal one frame before stored in the shift register 26, and a first frame image signal stored in the shift register 27. Based on at least one of the frame image signals, three interpolated frame signals, which are image signals positioned between the first frame image signal and the second frame image signal in time series, are generated.

  The interpolation frame generation unit 30 includes an interpolation frame generation unit 30a, an interpolation frame generation unit 30b, and an interpolation frame generation unit 30c in order to output a 60 Hz input signal as a 240 Hz output signal.

  Assuming that the time when the second frame image signal is supplied is t0, the time when the first frame image signal is supplied is t4, and the time from the time t0 to the time t4 is T, the interpolation frame generator 30a. Is based on at least one of the second frame image signal and the first frame image signal, and the first interpolated frame at time t1, which is the time when (1/4) T has elapsed from time t0. Generate a signal.

  Similarly, the interpolation frame generation unit 30b generates a second interpolation frame signal at time t2, which is the time when (1/2) T has elapsed from time t0, and the interpolation frame generation unit 30c performs (3 / 4) A third interpolation frame signal is generated at time t3, which is the time when T has elapsed.

  When the selection processing unit 31 determines that the double speed mode is selected by the mode selection determination unit 22a, the selection processing unit 31 generates the first frame image signal generated by the interpolation frame generation unit 30a between the first frame image signal and the second frame image signal. The first interpolation frame signal, the second interpolation frame signal generated by the interpolation frame generation unit 30b, and the third interpolation frame signal generated by the interpolation frame generation unit 30c, the second frame image signal, The first interpolation frame signal, the second interpolation frame signal, the third interpolation frame signal, the first interpolation frame signal, and the third interpolation frame signal are output in this order. The interpolated frame signal is stored in the frame memory 19.

  When the selection processing unit 31 determines that the 2D / 3D mode is selected by the mode selection determination unit 22a, the selection processing unit 31 stores the first shift image signal stored in the shift register 26 and the second shift image stored in the shift register 27. The shift image signal is stored in the frame memory so as to alternately output the shift image signal.

  As described above, according to the image display device 3 that is the third embodiment of the present invention, in addition to the effects of the image display device 2 that is the second embodiment of the present invention, the 4 × speed image and the 3D image are switched, and 60 Hz Can be output as an output signal of 240 Hz.

  In the third embodiment of the present invention, an image display device that switches between a quadruple speed image and a 3D image by sharing a frame memory and a shift register and outputs a 60 Hz input signal as a 240 Hz output signal is taken as an example. However, the image is not limited to a quadruple speed image and may be any number of times. For example, in order to output an N × speed image, a configuration including (N−1) interpolation frame generation units may be employed.

  In a fourth embodiment of the present invention, an image display device that shares a frame memory and a shift register and outputs a double-speed 3D image generated based on a 60 Hz input signal as a 120 Hz output signal will be described as an example.

<Configuration of image display device>
FIG. 8 is a configuration diagram showing a configuration of an image display apparatus 4 that is Embodiment 4 of the present invention. In FIG. 8, the flow of the image signal is indicated by a solid line, and the flow of the control signal is indicated by a broken line.

  The image display device 4 includes an input terminal 11, a frame memory 12, a motion vector detection unit 13, a pattern detection unit 15, a shift amount determination unit 16, an output terminal 20, a CPU 22, an operation unit 23, and a selection. A processing unit 32, a shift selection unit 33, a shift register 34, a shift register 35, an interpolation frame generation unit 36, a selection processing unit 37, a selection processing unit 38, and a frame memory 39 are provided.

  Here, among the configurations of the image display device 4 that is Embodiment 4 of the present invention, the input terminal 11, the frame memory 12, the motion vector detection unit 13, the pattern detection unit 15, and the shift amount determination unit 16 are included. The output terminal 20 and the operation unit 23 are the same as those of the image display device 2 according to the second embodiment of the present invention, respectively, and have the same reference numerals, and thus the description thereof is omitted.

  The CPU 22 performs central control of the image display device 4. Specifically, the frame memory 12, the motion vector detection unit 13, the interpolation frame generation unit 36, the pattern detection unit 15, the shift amount determination unit 16, the frame memory 39, and the selection processing unit 32 described above, The shift selection unit 33, the shift register 34, the shift register 35, the selection processing unit 37, and the selection processing unit 38 are controlled.

  Further, the CPU 22 is provided with a mode selection determination unit 22b in terms of its function, and the mode selection determination unit 22b is based on the operation of the operation unit 23 by the user, and the double speed mode, 2D / 3D mode, and double speed 2D / It is determined which one of the 3D modes has been selected.

  The selection processing unit 32 supplies the second frame image signal stored in the frame memory 12 to the shift register 34.

  The shift selection unit 33 selects the motion vector detected by the motion vector detection unit 13 and the shift amount for either the left eye or the right eye determined by the shift amount determination unit 16 and determines the shift amount. The shift amount of the other of the left eye and the right eye determined by the unit 16 is selected.

  The shift register 34 shifts the second frame image signal output from the frame memory 12 in at least one of the main scanning direction and the sub-scanning direction based on one shift amount selected by the shift selection unit 33. The motion vector selected by the shift selector 33 is stored while being stored as the second shifted image signal.

  The shift register 35 shifts the input first frame image signal in at least one direction of the main scanning direction or the sub-scanning direction based on the one shift amount selected by the shift selection unit 33. The image signal and the motion vector selected by the shift selection unit 33 are stored, and the input first frame image signal is changed in the main scanning direction or based on the other shift amount selected by the shift selection unit 33. A third shifted image signal shifted in at least one direction of the sub-scanning direction is stored.

  The interpolation frame generation unit 36 is based on the motion vector and at least one shift image signal of the second shift image signal stored in the shift register 34 and the first shift image signal stored in the shift register 35. Then, one or more interpolation frame signals which are image signals between the first shift image signal and the second shift image signal are generated in time series.

  The selection processing unit 37 supplies the third shift image signal stored in the shift register 35 to the frame memory 39.

  The selection processing unit 38 includes one or more interpolations generated by the interpolation frame generation unit 36 between the third shift image signal and a fourth shift image signal delayed from the third shift image signal by one frame period. One or more interpolated frame signals are stored in the frame memory 39 so as to output the frame signals.

  The frame memory 39 stores one or more interpolated frame signals and a third shifted image signal.

<Operation of image display device>
The operation of the image display device 4 that is Embodiment 4 of the present invention will be described.

  The image display device 4 that is Embodiment 4 of the present invention executes double speed 2D / 3D processing each time a frame image is supplied from the input terminal 11. Note that the double speed process and the 2D / 3D process are the same as the double speed process and the 2D / 3D process in the image display apparatus 2 according to the second embodiment of the present invention, and thus description thereof is omitted.

≪Double speed 2D / 3D processing≫
The double speed 2D / 3D processing by the image display device 4 that is Embodiment 4 of the present invention will be described.

  FIG. 9 is a flowchart showing a processing flow of double speed 2D / 3D processing by the image display apparatus 4 which is Embodiment 4 of the present invention.

  As shown in FIG. 9, when the first frame image signal is supplied from the input terminal 11, the CPU 22 determines whether or not the double speed 2D / 3D is selected (step S501). Specifically, it is determined whether or not the double speed 2D / 3D mode is set based on the operation of the operation unit 23 by the user.

  If it is determined in step S501 that the double speed 2D / 3D is selected (in the case of YES), the first frame image signal supplied from the input terminal 11 based on an instruction from the CPU 22 is at least the frame memory 12. Is supplied to the motion vector detection unit 13, the pattern detection unit 15, and the shift register 35 (step S503).

  Next, the motion vector detection unit 13 includes a second frame image signal that is a frame image signal of the previous frame stored in the frame memory 12, and a first frame image signal newly supplied from the input terminal 11. The motion vector is detected based on the difference between them (step S505).

  Next, the pattern detection unit 15 detects the feature of the first frame image signal supplied from the input terminal 11 as a signal pattern (step S507).

  The shift amount determination unit 16 shifts the first frame image signal supplied from the input terminal 11 for the right eye to display a stereoscopic image based on the signal pattern detected by the pattern detection unit 15. The amount to be shifted and the amount to shift for the left eye are determined (step S509).

  Then, the shift selection unit 33 selects the motion vector detected by the motion vector detection unit 13 and the shift amount for the right eye determined by the shift amount determination unit 16, and outputs the shift register 34 and the shift register 35. In addition to the supply, the shift amount for the left eye determined by the shift amount determination unit 16 is selected and supplied to the shift register 35 (step S511).

  Next, the shift register 35 outputs the first frame image signal input from the input terminal 11 based on the shift amount for the right eye selected by the shift selection unit 33 in at least one direction of the main scanning direction or the sub scanning direction. To generate the first shift image signal (shift image signal for the right eye), and supply the generated first shift image signal and the motion vector selected by the shift selection unit 33 to the interpolation frame generation unit 36. (Step S513).

  Furthermore, the shift register 35 outputs the first frame image signal input from the input terminal 11 in at least one direction of the main scanning direction or the sub-scanning direction based on the shift amount for the left eye selected by the shift selection unit 33. A shifted third shift image signal (left-eye shift image signal) is generated, and the generated third shift image signal is supplied to the selection processing unit 37 (step S515).

  Next, the selection processing unit 37 stores the third shift image signal supplied in step S515 in the frame memory 39 (step S517).

  Next, the shift register 34 outputs the second frame image signal output from the frame memory 12 based on the shift amount for the right eye selected by the shift selection unit 33 in at least one direction in the main scanning direction or the sub scanning direction. To generate a second shift image signal (right-eye shift image signal), and the generated second shift image signal and the motion vector selected by the shift selection unit 33 are interpolated frame generation unit 36. (Step S519).

  Then, the interpolation frame generation unit 36 includes at least one shift image signal of the second shift image signal stored in the shift register 34 and the first shift image signal stored in the shift register 35, and a motion vector. Based on the above, one or more interpolated frame signals, which are image signals between the first shift image signal and the second shift image signal in time series, are generated (step S521).

  Next, the selection processing unit 38 generates the interpolation generated by the interpolation frame generation unit 36 between the third shift image signal and the fourth shift image signal delayed by one frame period from the third shift image signal. The interpolated frame signal is stored in the frame memory 39 so as to output the frame signal (step S523).

  Then, the CPU 22 is sequentially generated based on the third shift image signal and the first shift image signal or the second shift image signal which are sequentially supplied from the input terminal 11 and stored in the frame memory 39, and the frame memory The interpolation frame signal stored in 39 is alternately output from the output terminal 20 at 120 (Hz), thereby outputting a double-speed and stereoscopic video as a double-speed 3D image (step S525).

  As described above, according to the image display device 4 that is Embodiment 4 of the present invention, the frame image is supplied from the input terminal 11 while sharing the shift register 34, the shift register 35, and the frame memory 39. Since the double speed process and the 2D / 3D process are executed each time, it is not necessary to provide the shift register 34, the shift register 35, and the frame memory 39 in each of the double speed process and the 2D / 3D process. Therefore, the image display device 4 that is Embodiment 4 of the present invention can output a double-speed image and a double-speed 3D image that is a stereoscopic image without making the device configuration large-scale.

  In the image display device 4 that is Embodiment 4 of the present invention, the shift selection unit 33 uses the motion vector detected by the motion vector detection unit 13 and the shift amount for the right eye determined by the shift amount determination unit 16. Is selected and supplied to the shift register 34 and the shift register 35, and the shift amount for the left eye determined by the shift amount determination unit 16 is selected and supplied to the shift register 35. It may be reversed. Specifically, the shift selection unit 33 selects the motion vector detected by the motion vector detection unit 13 and the shift amount for the left eye determined by the shift amount determination unit 16, and shift register 34, shift register The shift amount for the right eye determined by the shift amount determination unit 16 may be selected and supplied to the shift register 35.

  FIG. 10 is a diagram schematically showing storage in the shift register 34 and the shift register 35 by the shift selection unit 33.

  As shown in FIG. 10, the shift register 35 shifts the predetermined pixel 35a of the first frame image by 8 pixels based on the shift amount for the left eye selected by the shift selection unit 33, and performs the third shift. The pixel 35b of the image signal (shifted image signal for the left eye) is obtained.

  Further, the shift register 35 shifts the predetermined pixel 35a of the first frame image by 8 pixels based on the shift amount for the right eye selected by the shift selection unit 33, thereby shifting the first shift image signal (for the right eye). (Shifted image signal) of pixel 35c is obtained, and is further shifted by four pixels based on the motion vector to obtain pixel 35d of the interpolated frame image.

  On the other hand, the shift register 34 shifts the predetermined pixel 34a of the second frame image by 8 pixels based on the shift amount for the right eye selected by the shift selection unit 33, and outputs the second shift image signal (for the right eye). Pixel 34c of the shifted image signal), and further, the pixel 34d of the interpolated frame image is obtained by shifting by four pixels based on the motion vector.

  FIG. 11 is a diagram schematically illustrating the storage area of the shift register 34.

  As illustrated in FIG. 11, based on the operation of the operation unit 23 by the user, either the second shift image signal or the motion vector is stored as the maximum value of the storage area in which the shift register 34 stores the maximum storage capacity. Is determined.

  When the maximum storage capacity is determined, the shift selection unit 33 stores either the second shift image signal or the motion vector so as not to exceed the maximum storage capacity.

  As shown in FIG. 11A, when the maximum storage capacity is determined for the double speed processing, the motion vector is stored by making the maximum use of the double speed processing area. At this time, the storage area shown in FIG. 11B is the maximum storage capacity for double speed processing.

  On the other hand, as shown in FIG. 11D, when the maximum storage capacity is determined for 2D / 3D processing, the second shift image signal is stored by making the maximum use of the double speed processing area. At this time, the storage area shown in FIG. 11C is the maximum storage capacity for 2D / 3D processing.

  As described above, the shift selection unit 33 determines the maximum storage capacity as the maximum value of the storage area in which one of the second shift image signal and the motion vector is stored in the shift register 34 based on the external input. In this case, since either one of the second shift image signal and the motion vector is stored so as not to exceed the maximum storage capacity, the storage area of the shift register 34 can be used efficiently.

  Similarly, with respect to the shift register 35, the shift selection unit 33 determines the maximum storage area in which one of the first shift image signal and the motion vector is stored in the second shift register based on the external input. When the maximum storage capacity is determined as a value, either the first shift image signal or the motion vector is stored so as not to exceed the maximum storage capacity.

  In the fourth embodiment of the present invention, an image display device that shares a frame memory and a shift register and outputs a double speed 3D image generated based on a 60 Hz input signal as an output signal of 120 Hz has been described as an example. Not limited to this.

  In the fifth embodiment of the present invention, an image display apparatus that shares a frame memory and a shift register and outputs a quadruple speed 3D image generated based on a 60 Hz input signal as an output signal of 240 Hz will be described as an example.

<Configuration of image display device>
FIG. 12 is a configuration diagram showing a configuration of an image display device 5 that is Embodiment 5 of the present invention. In FIG. 12, the flow of the image signal is indicated by a solid line, and the flow of the control signal is indicated by a broken line.

  The image display device 5 includes an input terminal 11, a frame memory 12, a motion vector detection unit 13, a pattern detection unit 15, a shift amount determination unit 16, an output terminal 20, a CPU 22, an operation unit 23, and a selection. A processing unit 32, a shift selection unit 33, a shift register 43, a shift register 35, a selection processing unit 37, a frame memory 39, an interpolation frame generation unit 40, and a selection processing unit 41 are provided.

  Here, among the configurations included in the image display device 5 that is Embodiment 5 of the present invention, the input terminal 11, the frame memory 12, the motion vector detection unit 13, the pattern detection unit 15, and the shift amount determination unit 16 are included. The frame memory 39, the output terminal 20, the CPU 22, the operation unit 23, the selection processing unit 32, the shift register 35, and the selection processing unit 37 are each an image display device 4 that is Embodiment 4 of the present invention. Are the same as those provided with the same reference numerals, and a description thereof will be omitted.

  The shift register 43 shifts the second frame image signal output from the frame memory 12 in at least one direction of the main scanning direction or the sub-scanning direction based on one shift amount selected by the shift selection unit 33. The motion vector selected by the shift selector 33 is stored while being stored as the second shifted image signal. The shift register 43 shifts the second frame image signal output from the frame memory 12 in at least one direction of the main scanning direction or the sub-scanning direction based on the other shift amount selected by the shift selection unit 33. And store the motion vector selected by the shift selector 33 as a fourth shifted image signal.

  The interpolation frame generation unit 40 is based on the motion vector and at least one of the second shift image signal stored in the shift register 43 and the first shift image signal stored in the shift register 35. The fourth shift image signal stored in the shift register 43 while generating two interpolated frame signals which are image signals between the first shift image signal and the second shift image signal in time series And a third shift image signal stored in the shift register 35, and an image signal between the third shift image signal and the fourth shift image signal in time series based on at least one of the shift image signals. One interpolation frame signal is generated.

  The interpolation frame generation unit 40 includes an interpolation frame generation unit 40a, an interpolation frame generation unit 40b, and an interpolation frame generation unit 40c in order to output a 60 Hz input signal as a 240 Hz output signal.

  The time point at which the second shift image signal is supplied is t0, the time point at which the first shift image signal (right-eye shift image signal) is supplied is t4, and the time from the time point t0 to the time point t4 is T. The interpolation frame generation unit 40a, based on at least one of the second shift image signal and the first shift image signal, is a time point t1 that is (1/4) T elapsed from the time point t0. The first interpolation frame signal (shifted image signal for the right eye) is generated.

  The interpolated frame generation unit 40b is based on at least one of the fourth shift image signal and the third shift image signal, and is the time point t1 that is a time point that has passed (1/2) T from the time point t0. 2nd interpolation frame signal (shifted image signal for the left eye) is generated.

  The interpolation frame generation unit 40c is based on at least one shift image signal of the second shift image signal and the first shift image signal, at a time point t3 that is a time point when (3/4) T has elapsed from the time point t0. A third interpolation frame signal (shifted image signal for the right eye) is generated.

  If the selection processing unit 41 determines that the double-speed 2D / 3D mode is selected by the mode selection determination unit 22a, the third shift image signal and a fourth shift image delayed by one frame period from the third shift image signal The first interpolation frame signal generated by the interpolation frame generation unit 40a, the second interpolation frame signal generated by the interpolation frame generation unit 40b, and the first interpolation frame generation unit 40c generated by the interpolation frame generation unit 40c. The third interpolation frame signal is output in the order of the fourth shift image signal, the first interpolation frame signal, the second interpolation frame signal, the third interpolation frame signal, and the third shift image signal. One interpolation frame signal, a second interpolation frame signal, and a third interpolation frame signal are stored in the frame memory 39.

  As described above, according to the image display device 5 that is the fifth embodiment of the present invention, in addition to the effects of the image display device 4 that is the fourth embodiment of the present invention, a quadruple-speed image and a quadruple-speed 3D image that is a stereoscopic image. Can be output.

  In the fifth embodiment of the present invention, an image display apparatus that shares a frame memory and a shift register and outputs a quadruple speed 3D image generated based on a 60 Hz input signal as an output signal of 240 Hz will be described as an example. However, it is not limited to a 4 × speed image, and any number of times may be used. For example, in order to output an N × speed image, a configuration including (N−1) interpolation frame generation units may be employed.

DESCRIPTION OF SYMBOLS 1, 2, 3, 4, 5 ... Image display apparatus 11 ... Input terminal 12, 19 ... Frame memory 13 ... Motion vector detection part 14, 30, 30a, 30b, 30c, 36, 40, 40a, 40b, 40c ... Interpolation Frame generation unit 15 ... pattern detection unit 16 ... shift amount determination unit 17, 26, 27, 34, 35 ... shift register 18, 24, 25, 28, 29, 31, 32, 37, 38, 41 ... selection processing unit 33 ... Shift selection unit 20 ... Output terminal 22 ... CPU
22a, 22b ... mode selection determination unit 23 ... operation unit

Claims (6)

A first frame memory for storing the input first frame image signal and outputting a second frame image signal delayed by one frame period;
Motion vector detection means for detecting a motion vector based on a difference between the first frame image signal and the second frame image signal;
Based on at least one frame image signal of the motion vector detected by the motion vector detection means, the first frame image signal, and the second frame image signal, the first frame in time series. Interpolation frame generation means for generating one or more interpolation frame signals that are image signals between the image signal and the second frame image signal;
Pattern detecting means for detecting a characteristic of the first frame image signal as a signal pattern;
Shift amount determining means for determining an amount of shifting the first frame image signal to display a stereoscopic image based on the signal pattern detected by the pattern detecting means;
A shift register that shifts the first frame image signal in at least one of the main scanning direction and the sub-scanning direction according to the shift amount determined by the shift amount determining means, and stores it as a shifted image signal;
Based on an external input, either a double speed mode for outputting the frame rate of the first frame image signal at a double speed or a 2D / 3D mode for converting the first frame image signal to a stereoscopic image signal and selecting it is selected. Mode selection determination means for determining whether or not
A second frame memory for storing the one or more interpolated frame signals or the shifted image signal and the first frame image signal;
One or more interpolation frame signals generated by the interpolation frame generation unit between the first frame image signal and the second frame image signal when the mode selection determination unit determines that the double speed mode has been selected. The one or more interpolated frame signals are stored in the second frame memory, and when the 2D / 3D mode is selected by the mode selection determining means, the first frame image signal Selection processing means for storing the shift image signal in the second frame memory so as to alternately output the shift image signal stored in the shift register.
An image display device comprising: A first frame memory for storing the input first frame image signal and outputting a second frame image signal delayed by one frame period;
Motion vector detection means for detecting a motion vector based on a difference between the first frame image signal and the second frame image signal;
Pattern detecting means for detecting a characteristic of the first frame image signal as a signal pattern;
Shift amount determining means for determining an amount of shifting the first frame image signal to display a stereoscopic image based on the signal pattern detected by the pattern detecting means;
Based on an external input, either a double speed mode for outputting the frame rate of the first frame image signal at a double speed or a 2D / 3D mode for converting the first frame image signal to a stereoscopic image signal and selecting it is selected. Mode selection determination means for determining whether or not
When it is determined that the double speed mode is selected by the mode selection determining means, the second frame image signal stored in the first frame memory is selected, and the 2D / 3D mode is selected by the mode selection determining means. A first selection processing means for selecting the first frame image signal when it is determined that
When it is determined that the double speed mode has been selected by the mode selection determining means, when the motion vector detected by the motion vector detecting means is selected, and when the 2D / 3D mode is determined by the mode selection determining means, Second selection processing means for selecting the shift amount determined by the shift amount determination means;
When it is determined that the double speed mode has been selected by the mode selection determination means, the second frame image signal selected by the first selection processing means, and the motion vector selected by the second selection processing means And when the 2D / 3D mode is determined to be selected by the mode selection determining means, the first frame image signal selected by the first selection processing means is at least in the main scanning direction or the sub-scanning direction. A first shift register that shifts one side and stores it as a shifted image signal;
A second shift register for storing the first frame image signal, when it is determined that the double speed mode is selected by the mode selection determining means;
When it is determined that the double speed mode has been selected by the mode selection determining means, the motion vector, the second frame image signal stored in the first shift register, and the second frame image signal stored in the second shift register. One or more interpolated frame signals that are image signals between the first frame image signal and the second frame image signal in time series based on at least one frame image signal of one frame image signal Interpolating frame generating means for generating
A second frame memory for storing the one or more interpolated frame signals or the shifted image signal and the first frame image signal;
One or more interpolation frame signals generated by the interpolation frame generation unit between the first frame image signal and the second frame image signal when the mode selection determination unit determines that the double speed mode has been selected. The one or more interpolated frame signals are stored in the second frame memory so that the second frame image signal is output when the mode selection determining unit determines that the 2D / 3D mode is selected. And a third selection processing means for storing the shift image signal in a second frame memory so as to alternately output the shift image signal stored by the first shift register.
An image display device comprising: The first shift register includes:
When it is determined that the double speed mode has been selected by the mode selection determination means, the second frame image signal selected by the first selection processing means, and the motion vector selected by the second selection processing means And when the 2D / 3D mode is determined to be selected by the mode selection determining means, the first frame image signal selected by the first selection processing means is at least in the main scanning direction or the sub-scanning direction. Shifted to one side and stored as the first shifted image signal,
The second shift register is
When it is determined that the double speed mode is selected by the mode selection determining means, the first frame image signal is stored, and when it is determined that the 2D / 3D mode is selected by the mode selection determining means, the supplied first Shifting one frame image signal in at least one of the main scanning direction and the sub-scanning direction and storing it as a second shifted image signal;
The second frame memory is
Storing the one or more interpolated frame signals, or the first shifted image signal or the second shifted image signal, and the first frame image signal;
The third selection processing means includes
One or more interpolation frame signals generated by the interpolation frame generation unit between the first frame image signal and the first frame image signal when the mode selection determination unit determines that the double speed mode has been selected. The one or more interpolated frame signals are stored in the second frame memory so that the 2D / 3D mode is selected by the mode selection determining means. The first shift image signal is stored in the second frame memory so as to alternately output the stored first shift image signal and the second shift image signal stored by the second shift register. Let
When it is determined that the double speed mode is selected by the mode selection determining means, the first frame image signal supplied from the outside is stored in the second frame memory, and the 2D / 3D mode is stored by the mode selection determining means. So that the first shift image signal stored by the first shift register and the second shift image signal stored by the second shift register are alternately output, The image display device according to claim 2, further comprising fourth selection processing means for storing the second shift image signal in the second frame memory. A first frame memory for storing the input first frame image signal and outputting a second frame image signal delayed by one frame period;
Motion vector detection means for detecting a motion vector based on a difference between the first frame image signal and the second frame image signal;
Pattern detecting means for detecting a characteristic of the first frame image signal as a signal pattern;
Shift amount determining means for determining a shift amount for shifting the first frame image signal for the left eye and for the right eye in order to display a stereoscopic image based on the signal pattern detected by the pattern detection means;
The motion vector detected by the motion vector detection means and the shift amount for either the left eye or right eye determined by the shift amount determination means are selected and determined by the shift amount determination means Shift selecting means for selecting the shift amount of the other of the left eye and the right eye;
Based on the one shift amount selected by the shift selection means, the second frame image signal output from the first frame memory is shifted in at least one of the main scanning direction and the sub-scanning direction. A first shift register that stores the motion vector selected by the shift selection means and stores it as a second shift image signal;
A first shifted image signal obtained by shifting the input first frame image signal in at least one direction of the main scanning direction or the sub-scanning direction based on the one shift amount selected by the shift selection unit; , The motion vector selected by the shift selection means, and the input first frame image signal based on the other shift amount selected by the shift selection means. A second shift register for storing a third shift image signal shifted in at least one direction of the scanning direction;
At least one shift image signal among the motion vector, the second shift image signal stored in the first shift register, and the first shift image signal stored in the second shift register. An interpolated frame generating means for generating one or more interpolated frame signals that are image signals between the first shifted image signal and the second shifted image signal in time series;
A second frame memory for storing the one or more interpolated frame signals and the third shifted image signal;
One or more interpolation frame signals generated by the interpolation frame generation unit are output between the third shift image signal and a fourth shift image signal delayed from the third shift image signal by one frame period. Selection processing means for storing the one or more interpolated frame signals in the second frame memory,
An image display device comprising: The shift selection means includes
When a maximum storage capacity is determined as a maximum value of a storage area in which one of the second shift image signal and the motion vector is stored in the first shift register based on an external input, the maximum The image display apparatus according to claim 4, wherein either one of the second shift image signal and the motion vector is stored so as not to exceed a storage capacity. The shift selection means includes
When a maximum storage capacity is determined as a maximum value of a storage area in which one of the first shift image signal and the motion vector is stored in the second shift register based on an external input, the maximum The image display apparatus according to claim 4, wherein either one of the first shift image signal and the motion vector is stored so as not to exceed a storage capacity.

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