JP7238619B2 - Image projection device, control method and program - Google Patents

Description

The present invention relates to an image projection apparatus, control method and program.

When a video signal is input, a conventional image projection apparatus analyzes the input video signal to determine resolution, frequency, etc., and projects an image based on the determination result.

For example, in Patent Document 1, necessary data for projecting an optimum image for each different video signal is stored in advance in a recording means, and the identifier of the video signal once projected is stored in the recording means. , at the time of image switching, the input video signal is analyzed, the identifier stored in the recording means is used to refer to the video data corresponding to the input video signal, and based on the video data, instantaneously Techniques for performing projection are disclosed.

However, if a video signal with a special resolution or frequency is input, such as a video signal whose operation has not been confirmed, or a video signal that is not supported by the image projection device, an erroneous judgment will occur in the analysis of the video signal. , unable to project normally.

On the other hand, for example, a game machine uses a special video signal that is not so common, and there is a demand for an image projection apparatus to project an image based on the video signal. In such cases, in order to enable normal projection, it is necessary to update the image projection device by creating firmware that supports special video signals. The problem is that it takes a long time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image projection apparatus, a control method, and a program capable of quickly and normally projecting even when a special video signal is input. and

In order to solve the above-described problems and achieve the object, the image projection apparatus of the present invention includes a video analysis unit that analyzes an input video signal ; The image information including the horizontal position indicating the projection position of the image in the vertical direction and the vertical position indicating the projection position of the image in the vertical direction has a predetermined resolution, frequency, horizontal position indicating the projection position of the image in the horizontal direction, and vertical position indicating the projection position of the image in the vertical direction. A second device which is determined corresponding to the erroneous determination signal information and capable of normally projecting the video signal when the erroneous determination signal information represented by the combination of the vertical positions indicating the projection position of the image in the direction matches. and a projection control unit for projecting a video signal based on the second video information converted by the conversion unit.

ADVANTAGE OF THE INVENTION According to this invention, even when a special video signal is input, it is effective in being able to project rapidly and normally.

FIG. 1 is a diagram illustrating an example hardware configuration of a projector according to an embodiment. FIG. 2 is a diagram illustrating a functional configuration example of the projector according to the embodiment; FIG. 3 is a diagram illustrating an example of an erroneous determination table according to the embodiment; FIG. 4 is a diagram illustrating an example of a conversion table according to the embodiment; FIG. 5 is a flow chart showing an operation example from the input of a video signal to the start of projection in the projector according to the embodiment. FIG. 6 is a flowchart showing an example of video signal setting and re-projection operations in the projector according to the embodiment. FIG. 7 is a diagram showing an example of a video signal setting screen in the projector according to the embodiment. FIG. 8 is a diagram showing an example of a screen for confirming whether or not projection has been performed normally according to the embodiment.

BEST MODES FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of an image projection apparatus, a control method, and a program according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a hardware configuration diagram of the projector 1 of the embodiment. As shown in FIG. 1, the projector 1 includes a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, a storage unit 104, a media I/F (Interface) 106, an operation unit 107, power switch 108, bus line 109, network I/F 110, LED (Light Emitting Diode) drive circuit 111, LED light source 112, projection device 113, projection lens 114, input terminal 115, fan drive circuit 116, cooling fan 117, A power supply circuit 131 and a remote controller 201 are provided.

The CPU 101 controls the operation of the projector 1 as a whole. The ROM 102 stores programs used to drive the CPU 101 . A RAM 103 is used as a work area for the CPU 101 .

The storage unit 104 is a storage medium such as a HDD (Hard Disk Drive) or an SSD (Solid State Drive), and stores data obtained by image processing and other various types of processing on video signals. A media I/F 106 controls reading or writing (storage) of data to a recording medium 105 such as a flash memory.

Various keys, buttons, LEDs, and the like are arranged on the operation unit 107 , and the operation unit 107 is used by the user to perform various operations other than turning ON/OFF the power of the projector 1 . For example, the operation unit 107 receives instruction operations such as a size adjustment operation of a projected image, a color tone adjustment operation, a focus adjustment operation, and a keystone adjustment operation, and outputs the received operation contents to the CPU 101 .

A power switch 108 is a switch for switching ON/OFF of the power of the projector 1 . A bus line 109 is an address bus, a data bus, or the like for electrically connecting each component such as the CPU 101 shown in FIG. A network I/F 110 is an interface for data communication using a communication network such as the Internet.

The LED drive circuit 111 controls lighting and extinguishing of the LED light source 112 under the control of the CPU 101 . The LED light source 112 irradiates the projection device 113 with projection light when turned on under the control of the LED drive circuit 111 .

Projection device 113 projects modulated light obtained by modulating projection light from LED light source 112 by a spatial light modulation method based on image data supplied via input terminal 115 or the like through projection lens 114 onto the screen. An image is projected onto the projection surface. As the projection device 113, for example, a liquid crystal panel or a DMD (Digital Micromirror Device) is used. The LED drive circuit 111, the LED light source 112, the projection device 113, and the projection lens 114 as a whole function as a projection section 120 that projects a projection image onto a projection surface based on image data.

The input terminal 115 is an I/F such as HDMI (registered trademark) (High-Definition Multimedia Interface) or VGA (Video Graphics Array). A PC (Personal Computer) or an AV (Audio Visual) device is directly connected to the input terminal 115, and a control signal and image data are acquired from the PC or the AV device. The projector 1 may have multiple input terminals 115 .

The fan drive circuit 116 is connected to the CPU 101 and the cooling fan 117 and drives/stops the cooling fan 117 based on the control signal from the CPU 101 . The cooling fan 117 rotates to exhaust the air inside the projector 1 and cool the inside of the projector 1 .

The power supply circuit 131 controls supply of power to the projector 1 . A remote controller 201 is used for remote control of the projector 1 by a user. The user can perform various settings of the projector 1 not only from the operation unit 107 but also from the remote controller 201 .

When power is supplied, the CPU 101 is activated according to a control program pre-stored in the ROM 102, gives a control signal to the LED drive circuit 111 to turn on the LED light source 112, and controls the fan drive circuit 116. A signal is given to rotate the cooling fan 117 at a predetermined rated speed. Further, in the projector 1, when the supply of power from the power supply circuit 131 is started, the projection device 113 becomes ready for image projection, and power is supplied from the power supply circuit 131 to various other components. .

When the power switch 108 of the projector 1 is turned off, the power switch 108 sends a power-off signal to the CPU 101. When the CPU 101 detects the power-off signal, the CPU 101 gives a control signal to the LED driving circuit 111 to turn off the LED. The light source 112 is turned off. After a predetermined time has elapsed, the CPU 101 gives a control signal to the fan drive circuit 116 to stop the cooling fan 117, terminates its own control processing, and finally gives an instruction to the power supply circuit 131 to turn off the power supply. Stop the power supply.

The CPU 101 implements various functions by executing programs pre-stored in the ROM 102 or the like. FIG. 2 is a block diagram showing a functional configuration example of the projector 1 of the embodiment.

As shown in FIG. 2, the projector 1 includes a detection unit 121, an image analysis unit 122, a determination unit 123, a conversion unit 124, a reception unit 125, a projection control unit 126, and a registration unit 127. .

The detection unit 121 detects input of a video signal from a PC or AV equipment connected to the input terminal 115 . For example, the detection unit 121 detects a current change or a voltage change occurring at the input terminal 115 to detect input of a video signal.

When the detection unit 121 detects the input of a video signal, the video analysis unit 122 analyzes the input video signal and acquires video information. Here, in the present embodiment, video information refers to information related to video signals. Information included in the video information includes resolution, frequency, horizontal position, vertical position, and the like. The video analysis unit 122 acquires video information by analyzing the resolution, frequency, horizontal position, vertical position, etc. of the input video signal.

The resolution in this embodiment is an index representing the fineness of an image. The frequencies are the horizontal scanning frequency (KHZ), which represents the number of scanning lines projected by the video projector per unit time, and the vertical scanning frequency, which represents the number of times the image projector scans the screen from top to bottom per unit time. frequency (HZ). The horizontal position is information indicating the projection position of the image in the horizontal direction. The vertical position is information indicating the projection position of the image in the vertical direction.

The determination unit 123 determines whether or not the video information acquired by the video analysis unit 122 matches predetermined erroneous determination signal information. Here, in the present embodiment, erroneous determination signal information refers to video information whose resolution, frequency, etc. are not correctly determined in video analysis processing by the video analysis unit 122 .

FIG. 3 is a diagram showing an example of an erroneous determination table. The erroneous determination table is a table for registering erroneous determination signal information. The misjudgment table includes information such as the first identification number, resolution, frequency, horizontal position and vertical position. One combination of resolution, frequency, horizontal position, and vertical position represents one erroneous decision signal. The first identification number is an identification number for identifying each erroneous determination signal information. In this embodiment, the erroneous determination table is stored in the storage unit 104 .

In this embodiment, the determination unit 123 uses the video information (combination of resolution, frequency, horizontal position, and vertical position) acquired by the video analysis unit 122 as a key, and the false determination table contains an error determination signal that matches the key. to search for If there is erroneous determination signal information that matches the key, the determination unit 123 extracts the first identification number attached to the erroneous determination signal information.

Then, the determination unit 123 determines that the video information acquired by the video analysis unit 122 matches the erroneous determination signal information. On the other hand, if there is no erroneous determination signal information that matches the key, the determination unit 123 determines that the video information acquired by the video analysis unit 122 does not match the erroneous determination signal.

When the determination unit 123 determines that the video information acquired by the video analysis unit 122 matches the erroneous determination signal information, the conversion unit 124 converts the video information acquired by the video analysis unit 122 to correspond to the erroneous determination signal information. and converts the video signal into second video information that can be projected normally.

FIG. 4 is a diagram showing an example of a conversion table. The conversion table is a table for registering the second video information. The conversion table contains information such as the second identification number, resolution, frequency, horizontal position, and vertical position, like the above-described erroneous determination table. One combination of resolution, frequency, start position, and end position information represents one piece of second video information. In this embodiment, the conversion table is stored in the storage unit 104. FIG.

The second identification number is an identification number that identifies each piece of second video information. The second identification number is the same number as the first identification number that identifies the erroneous determination signal information corresponding to the second video information identified by the second identification number. In other words, the erroneous determination signal information with the first identification number is associated with the second video information with the second identification number that is the same as the first identification number.

In this embodiment, the conversion unit 124 uses the first identification number attached to the erroneous determination signal information extracted by the determination unit 123 as a key, and selects a number that matches the key from among the second identification numbers in the conversion table. Search for The conversion unit 124 extracts the second video information with the second identification number that matches the first identification number used as the key. Also, the conversion unit 124 converts the video information acquired by the video analysis unit 122 into extracted second video information.

The reception unit 125 receives an input of video information from the user in the video signal setting process described later. In this embodiment, the reception unit 125 receives information input from the operation unit 107 or the remote controller 201 . The contents of the information input include input of an instruction to project various setting screens, input of numerical values for changing various settings, and the like.

Numerical values are input by the user by, for example, incrementing/decrementing numerical values with the up/down keys of the operation unit 107 or the remote controller 201 . If the operation unit 107 or the remote controller 201 has 10 keys or the like, the user can directly input numerical values.

The projection control section 126 controls image projection by the projection section 120 . The projection control section 126 projects a video signal based on the video information analyzed by the video analysis section 122 . Projection control unit 126 projects a video signal based on the second video information converted by conversion unit 124 . Further, when the video signal setting process is performed, the projection control unit 126 changes the video information acquired by the video analysis unit 122 to the video information received by the reception unit 125, and generates a video signal based on the changed video information. is projected back. Furthermore, the projection control unit 126 also projects various setting screens such as a video signal setting screen.

In a state in which a video signal based on the changed video information is being projected, the registration unit 127 associates the erroneous determination signal information with the second video information and stores them in the storage unit 127 when an instruction to register the changed video information is received. Register with 104. In the present embodiment, when the reception unit 125 receives a registration instruction of changed video information, the registration unit 127 adds the first identification number to the erroneous determination signal information and registers it in the erroneous determination table. Further, the registration unit 127 assigns the second identification number to the image information received by the reception unit 125 as the second image information and registers it in the conversion table. Registration unit 127 stores the erroneous determination table and the conversion table in storage unit 104 .

In this embodiment, the functions of the detection unit 121, the video analysis unit 122, the determination unit 123, the conversion unit 124, the reception unit 125, the projection control unit 126, and the registration unit 127 are stored in the ROM 102 or the like by the CPU 101. It is realized by executing the program that is written, but it is not limited to this. For example, at least some of the functions of the detection unit 121, the image analysis unit 122, the determination unit 123, the conversion unit 124, the reception unit 125, the projection control unit 126, and the registration unit 127 described above are implemented by dedicated hardware. It may be implemented by a hardware circuit.

The program executed by the projector 1 is a computer-readable record such as a CD-ROM, a flexible disk (FD), a CD-R, a DVD (Digital Versatile Disk), etc., in an installable or executable format. It may be configured to be recorded on a medium and provided. Further, the program executed by the projector 1 may be stored on a computer connected to a network such as the Internet, and may be provided by being downloaded via the network. Also, the program executed by the projector 1 may be provided or distributed via a network such as the Internet.

Each function of the embodiments described above may be implemented by one or more processing circuits. Here, the "processing circuit" in this specification means a processor programmed by software to perform each function, such as a processor implemented by an electronic circuit, or a processor designed to perform each function described above. devices such as ASICs (Application Specific Integrated Circuits), DSPs (digital signal processors), FPGAs (field programmable gate arrays) and conventional circuit modules.

Next, an example of processing of the projector 1 will be described in detail with reference to FIGS. 5 and 6. FIG. FIG. 5 is a flow chart of an operation example from the input of a video signal to the start of projection.

As shown in FIG. 5, when a PC, an AV device, or the like is connected to the input terminal 115 and the input of a video signal is detected by the detection unit 121, the video analysis unit 122 analyzes the input video signal ( step S101).

The video analysis unit 122 acquires video information including resolution, frequency, horizontal position, vertical position, etc. (step S102).

Using the video information acquired by the video analysis unit 122 as a key, the determination unit 123 searches the erroneous determination table for erroneous determination signal information that matches the key. If there is erroneous determination signal information that matches the key, determination section 123 extracts the first identification number attached to the erroneous determination signal information that matches the key. Then, the determination unit 123 determines that the video information acquired by the video analysis unit 122 matches the erroneous determination signal information (step S103).

On the other hand, when there is no erroneous determination signal information that matches the key, the determination unit 123 determines that the video information acquired by the video analysis unit 122 does not match the erroneous determination signal information.

A case will be described where the determination unit 123 determines that the video information acquired by the video analysis unit 122 matches the erroneous determination signal information (step S103: YES). In this case, the conversion unit 124 searches for the second identification number in the conversion table using the first identification number attached to the erroneous determination signal information extracted by the determination unit 123 as a key.

The conversion unit 124 extracts the second video information with the second identification number that matches the key (step S104).

The conversion unit 124 converts the video information acquired by the video analysis unit 122 into the second video information extracted in step S104 (step S105).

The projection control unit 126 projects a video signal based on the second video information converted in step S105, and ends this processing (step S106).

Next, a case where the image information acquired by the image analysis unit 122 does not match the erroneous determination signal information will be described (step S103: NO). In this case, the projection control unit 126 projects the image signal based on the image information acquired by the image analysis unit 122, and ends this process (step S106).

Next, video signal setting and re-projection processing will be described. FIG. 6 is a flow chart of an operation example of video signal setting and re-projection.

As shown in FIG. 6, the projection control unit 126 projects a video signal based on the video information acquired by the video analysis unit 122 (step S201). The following is processing when an image is not projected normally in step S201.

The accepting unit 125 accepts input of an instruction to project a video signal setting screen from the operating unit 107 or the remote controller 201 (step S202).

When the reception unit 125 receives the information input, the projection control unit 126 projects a video signal setting screen superimposed on the currently projected image (step S203).

FIG. 7 is an example of a video signal setting screen. The user inputs resolution, frequency, horizontal position, vertical position, etc. from this screen. In this embodiment, the user uses the operation unit 107 or remote controller 201 to move the cursor to an arbitrary position, and inputs numerical values for frequency, horizontal position, vertical position, and the like.

Then, when the user presses the "determine" button on the video signal setting screen of FIG. 7, the reception unit 125 receives the resolution, frequency, horizontal position, vertical position, etc. input by the user as video information (step S204).

The projection control unit 126 changes the image information acquired by the image analysis unit 122 to the image information received by the reception unit 125 in step S204, and reprojects the image signal based on the changed image information (step S205).

The projection control unit 126 projects a confirmation screen on the re-projected image to confirm whether or not the projection has been performed normally (step S206).

Here, the projection control unit 126 may project the confirmation screen after a certain period of time has elapsed. In addition, the projection control unit 126 may erase the confirmation screen or re-project it according to the user's operation.

FIG. 8 is a diagram showing an example of a confirmation screen in this embodiment. In this example, the projection control unit 126 projects a screen on which a sentence asking whether the projection was successful or not and "yes" and "no" buttons are projected. When the user presses "yes", the reception unit 125 receives information input indicating normal projection. When the user presses "no", the reception unit 125 receives information input indicating that projection was not performed normally. It should be noted that "input of information indicating normal projection" in the present embodiment is an example of "instruction to register changed image information".

The receiving unit 125 receives an information input indicating that the projection was performed normally or an information input indicating that the projection was not performed normally (step S207).

A case where the reception unit 125 receives an information input indicating normal projection will be described (step S207: YES). In this case, the registration unit 127 assigns the first identification number to the acquired video information as erroneous determination signal information and registers it in the erroneous determination table (step S208).

At the same time as step S208, the registration unit 127 registers the image information received by the reception unit 125 in step S204 as second image information in the conversion table (step S209). At this time, the registration unit 127 assigns a second identification number, which is the same number as the first identification number assigned to the erroneous determination signal information registered in the erroneous determination table in step S208, to the second image. Register information in the conversion table.

The registration unit 127 saves the erroneous determination table and the conversion table in the storage unit 104, and ends this process (step S210).

Next, a case will be described where the receiving unit 125 has received an information input indicating that projection has not been performed normally (step S207: NO). In this case, the projection control unit 126 projects the video signal setting screen (step S203).

Thereafter, steps S203 to S207 are repeated until the reception unit 125 receives information input indicating that the projection has been performed normally.

As described above, in the present embodiment, the video analysis unit 122 cannot correctly determine the resolution, frequency, etc. of a special video signal such as a video signal whose operation has not been confirmed or a video signal that is not supported by the image projection device. is registered in advance as erroneous determination signal information in association with the second image information capable of being normally projected. Then, when a special video signal having video information that matches preliminarily registered erroneous determination signal information is input, the video information of the special video signal is converted to an erroneous determination that matches the video information of the special video signal. The second video information corresponding to the signal information is converted. Thereby, even when a special video signal is input, the video information of the special video signal can be immediately converted into the second video information. That is, according to this embodiment, even when a special video signal is input, it can be projected quickly and normally.

Further, in this embodiment, when the input video signal is not correctly projected, the receiving unit 125 receives input of video information. Since the projection control unit 126 re-projects the image signal based on the image information received by the reception unit 125, the user can confirm whether or not the image signal based on the input image information is projected normally. . Therefore, the user can finally input a video signal that can be normally projected. That is, according to the present embodiment, for example, the video analysis unit 122 cannot correctly determine the resolution, frequency, etc. of a special video such as a video signal whose operation has not been confirmed or a video signal that is not supported by the image projection device. Even when the signal is input for the first time, it is possible to perform prompt and normal projection by accepting the input of image information that can be normally projected.

Further, in the above case, when the reception unit 125 receives information input to the effect that projection has been performed normally, the registration unit 127 assigns the first identification number to the acquired image information as erroneous determination signal information. registered in the misjudgment table. Furthermore, the registration unit 127 assigns the second identification number, which is the same number as the first identification number attached to the corresponding erroneous determination signal, to the image information received by the reception unit 125 as the second image information. and register it in the conversion table. Then, registration unit 127 stores the erroneous determination table and the conversion table in storage unit 104 . Therefore, when the same video signal is input to the input terminal 115 thereafter, it is determined to match the erroneous determination signal information, and can be immediately converted into a video signal based on the second video information. That is, according to the present embodiment, it is possible to quickly and normally project an input video signal without receiving information input again.

Although the embodiments of the present invention have been described above, the above-described embodiments are presented as examples and are not intended to limit the scope of the invention. The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying constituent elements without departing from the scope of the present invention at the implementation stage. Also, various inventions can be formed by appropriate combinations of the plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be omitted from all components shown in the embodiments.

1 projector 101 CPU
102 ROMs
103 RAM
104 storage unit 105 recording medium 106 media I/F
107 operation unit 108 power switch 109 bus line 110 network I/F
111 LED drive circuit 112 LED light source 113 projection device 114 projection lens 115 input terminal 116 fan drive circuit 117 cooling fan 120 projection unit 121 detection unit 122 image analysis unit 123 determination unit 124 conversion unit 125 reception unit 126 projection control unit 127 registration unit 131 Power supply circuit 201 Remote controller

JP 2003-195415 A

Claims (5)

a video analysis unit that analyzes an input video signal;
The video information including the resolution and frequency, which are the information of the analyzed video signal, the horizontal position indicating the projection position of the image in the horizontal direction, and the vertical position indicating the projection position of the image in the vertical direction, is the predetermined resolution and frequency . , the horizontal position indicating the projection position of the image in the horizontal direction, and the vertical position indicating the projection position of the image in the vertical direction. a conversion unit that converts the video information into second video information that is determined and that allows the video signal to be projected normally;
a projection control unit that projects a video signal based on the second video information converted by the conversion unit;
Image projection device. When an input for changing the image information is received while the image signal is being projected, the projection control unit changes the image information according to the received input, and changes the image information to the changed image information. re-projecting a video signal based on
2. The image projection device according to claim 1. A storage unit that stores erroneous determination signal information and second video information,
When an instruction to register the changed image information is received while the image signal based on the changed image information is being projected, the original image information before the change is used as the erroneous determination signal information, and the changed image information is used as the erroneous determination signal information. A registration unit that associates video information as the second video information and registers it in the storage unit,
3. The image projection device according to claim 2. A control method for an image projection device, comprising:
a video analysis step of analyzing an input video signal;
The video information including the resolution and frequency, which are the information of the analyzed video signal, the horizontal position indicating the projection position of the image in the horizontal direction, and the vertical position indicating the projection position of the image in the vertical direction, is the predetermined resolution and frequency . , the horizontal position indicating the projection position of the image in the horizontal direction, and the vertical position indicating the projection position of the image in the vertical direction. a conversion step of converting the video information into second video information that is defined and that allows the video signal to be projected normally;
a projecting step of projecting a video signal based on the second video information converted by the converting step;
Control method including. image projection device,
a video analysis step of analyzing an input video signal;
The video information including the resolution and frequency, which are the information of the analyzed video signal, the horizontal position indicating the projection position of the image in the horizontal direction, and the vertical position indicating the projection position of the image in the vertical direction, is the predetermined resolution and frequency . , the horizontal position indicating the projection position of the image in the horizontal direction, and the vertical position indicating the projection position of the image in the vertical direction. a conversion step of converting the video information into second video information that is defined and that allows the video signal to be projected normally;
a projecting step of projecting a video signal based on the second video information converted by the converting step;
program to run the

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