JP3132444B2 - Supply device of multi-phase image signal for liquid crystal display device in which display is performed by multi-phase image signal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying a multi-phase image signal to a liquid crystal display device in which display is performed by the multi-phase image signal.

[0002]

2. Description of the Related Art A voltage applied to each pixel is applied to an intersection of a signal electrode (signal line) and a scanning electrode so that pixels arranged vertically and horizontally are completely separated and driving without crosstalk is performed. In an active matrix type liquid crystal display device provided with intermittent switches [for example, a transistor switch (thin film transistor: TFT switch, MOS transistor switch) and the like], a storage element that holds a voltage corresponding to an image signal for each pixel In the case where the frequency characteristic of the image signal is poor or the response of the switch of the transistor for switching the pixel is poor, an image signal to be displayed conventionally is converted into a multi-phase signal, for example, an N-phase (N Is a natural number of 2 or more), so that the occupied frequency band of the image signal for each phase is
2. Description of the Related Art An image signal reduced to 1 / N of the occupied frequency band of an original image signal is supplied to a liquid crystal display device.

FIG. 2 is a block diagram showing a schematic configuration of an active matrix type liquid crystal display device to which multi-phase image signals are supplied and a driving circuit. In FIG. Denotes a horizontal drive unit, 3 denotes a vertical drive unit, 4 denotes a drive signal source, and 5 denotes an image signal source. In the active matrix type liquid crystal display device 1 described above, liquid crystal is sealed between a pair of substrates, a common electrode is disposed on one of the pair of substrates, and A pixel electrode provided corresponding to each of the pixels arranged vertically and horizontally, a storage element connected to the pixel electrode, and a signal line # H1 for supplying an image signal to the storage element. , #
H2 ... # H1920 (1920 = P) and address lines # V1, # V2 ... # V1035 for selecting storage elements
(1035 = Q). Furthermore, TFT
Is a switch thin film transistor provided for each pixel, and CS is a storage element (capacitance) provided for each pixel.

[0004] In FIG. 2 (and FIG. 3), a horizontal driving unit 2 receives a start pulse H-ST of a horizontal shift register 9 (FIG. 3) and a two-phase clock pulse H- C1, H-C2, a shift direction control signal R / L-CTL, and the like are supplied, and an image signal obtained by multiplying an image signal to be displayed by the transmission line 8 from the image signal source 5 [In the following description, four phases (N
= 4) is also supplied. FIG. 3 is a block diagram mainly illustrating a specific configuration of the horizontal drive unit 2 in FIG. 2. In FIG. 3, reference numeral 1 denotes an active matrix type liquid crystal display device 1; , P2, P3... P1920 are 1 in the active matrix type liquid crystal display device 1 in FIG.
The pixel array in the row is shown as a representative example. # H1 ... #
H1913 correspond to the P signal lines # H1, # H2... # H1920 shown in FIG.

By the way, 1920 pixels (P) arranged in the horizontal direction of the active matrix type liquid crystal display device 1 are arranged.
1920) signal lines # H1, #H provided between the horizontal drive unit 2 and the active matrix type liquid crystal display device 1 in correspondence with the pixels P1, P2.
2. The pixel P described above performed by # H1920
1, P2... P1920 are supplied with image signals in the following manner.
When the image signal is single-phase, the signal lines # H1, # H2,... # H1920 are sequentially selected one by one on the time axis by the shift operation of the shift register 9 provided in the horizontal drive unit 2. , One by one pixels P1, P2,.
An image signal is supplied to P1920.
When the active matrix type liquid crystal display device 1 performs a display operation with a multi-phase image signal, the number (N) of pixels corresponding to the number of phases (N phases) of the image signal is defined as one group. An image signal is supplied to the pixels forming a group in such a manner that the group of pixels is simultaneously selected.

A case where the above-mentioned active matrix type liquid crystal display device 1 performs a display operation with a multi-phase image signal will be specifically described as follows. Assume that the number of phases of an image signal to be displayed is N, and the total number of pixels P1, P2,... Arranged in the horizontal direction of the active matrix type liquid crystal display device 1 is P. , The number of pixels of a group of pixels simultaneously selected on the time axis is P / N. For example, if the image signal is 4
The pixels P1 and P2 which are divided into phases (N = 4) and are arranged in the horizontal direction of the active matrix type liquid crystal display device 1
If the total number P of... Is 1920, the 1920 pixels arranged in the horizontal direction of the active matrix type liquid crystal display device 1 have four pixels as one group.
It is divided into 20/4 = 480 pixel groups.
The output lines # 1H, # 2H... # 480H connected from the shift register 9 to the level shifter 10 in FIG. 3 are 480 signal lines (signal electrodes) provided corresponding to the 480 pixel groups. It is. The number of pixels arranged in the vertical direction of the active matrix type liquid crystal display device 1 is Q.

Each output line # 1 of the shift register 9
The output signals supplied from H, # 2H... # 480H to the level shifter 10 are continuous N (N = N in the example) constituting a specific group of pixels for each of the output lines.
4) It is used as an open / close control signal for a switch SW that operates so that pixels are simultaneously selected. ., # 4 of N-phase (N = 4 in the example) supplied from the image signal source 5 in FIG. 2 to the horizontal drive unit 2 are transmitted. The transmission line 8 (corresponding to the transmission line 8 shown in FIG. 1) is shown. The first-phase image signal in the N-phase image signal is supplied to the signal line # H1 by a switch SW that closes when an output appears on the output line # 1H of the shift register 9, and the signal of the shift register 9 The output line #K of the shift register 9 is supplied to the signal line # H5 by a switch SW that closes when an output appears on the output line # 2H, and so on.
H (where K is 1, 2,..., 480) is closed by a switch SW which closes when an output appears on the signal line #H [1+ (K
-1) N] is supplied with the image signal of the first phase.

The second-phase image signal in the N-phase (N = 4 in the example) image signal supplied from the image signal source 5 to the horizontal drive unit 2 is output from the output line # 1H of the shift register 9.
Is supplied to the signal line # H2 by a switch SW that closes when an output appears on the output line, and is supplied to the signal line # H6 by a switch SW that closes when an output appears on the output line # 2H of the shift register 9. Thus, the output line #KH of the shift register 9 (where K is 1, 2,.
The image signal of the second phase is supplied to the signal line #H [2+ (K-1) N] by the switch SW that closes when the output appears at 80). The image signal of the third phase in the N-phase (N = 8 in the example) image signal supplied to the horizontal drive unit 2 from the image signal source 5 is output to the output line # 1H of the shift register 9. It is supplied to the signal line # H3 by the switch SW that closes when it appears, and is supplied to the signal line # H7 by the switch SW that closes when the output appears on the output line # 2H of the shift register 9, and so on. A switch SW that closes when an output appears on the output line #KH (where K is 1, 2,... 480) of the shift register 9 is connected to the third signal line #H [3+ (K−1) N].
The image signal of the phase is supplied.

Similarly, the image signal of the fourth phase in the N-phase (N = 4 in the example) image signal supplied from the image signal source 5 to the horizontal drive unit 2 Switch S that closes when an output appears on output line # 1H
W is supplied to the signal line # H4, and is supplied to the signal line # H8 by the switch SW that closes when an output appears on the output line # 2H of the shift register 9, and so on, and so on. #KH (however, K
480), the fourth-phase image signal is supplied to the signal line #H [4+ (K-1) N] by the switch SW which closes when an output appears at 1, 2,... 480). As described above, the image signal of each phase in the N-phase (N = 4 in the example) image signal supplied to the horizontal drive unit 2 from the image signal source 5 is as follows.
The output line #KH of the shift register 9 (where K is 1, 2)
.. 480) are simultaneously closed by an N number of switches SW when an output appears on the signal lines #H [i + (K
-1) N] (where i is a number from 1 to 4).

On the other hand, a vertical drive section 3 shown in FIG. 2 is connected to a start signal VST of a vertical shift register and a two-phase clock pulse VC by a transmission line 7 from a drive signal source 4.
1, VC2. Then, the output is supplied from the vertical shift register provided in the vertical drive unit 4 to the sequential scanning electrodes # V1, # V2,... # V1035.
In the horizontal scanning direction, the number of pixels corresponding to the number of phases of the image signal is simultaneously selected as a group of pixels, and scanning is performed in the vertical direction while displaying the pixels forming a group one after another. , An image is displayed.

By making the image signal multi-phase as described above, the image signal for each phase supplied to the active matrix type liquid crystal display device 1 is occupied narrower than the occupied frequency band of the original image signal. Since the image signal is in the frequency band, the frequency characteristic of the storage element that holds the voltage corresponding to the image signal for each pixel in the active matrix type liquid crystal display device 1 is poor, or a transistor for switching the pixel is used. Even if the response of the switch is poor, it is possible to display a good display image.

[0012]

When an image is displayed on a screen by a projection type display device, the projection type display device is installed on the front side of the screen to display the image on the screen. 2. Description of the Related Art A projection type display device is installed on the back side to display an image on a screen. As described above, in the case where the projection type display device is installed on the front side of the screen to display an image on the screen, and in the case where the projection type display device is installed on the back side of the screen and the image is displayed on the screen, It is necessary to reverse the orientation of the image in the horizontal direction.

In the case of an active matrix type liquid crystal display device to which a single-phase image signal is supplied, in order to reverse the image direction in the horizontal direction of the image projected on the screen, simply use horizontal driving. The shift direction of the horizontal shift register provided in the section 2 may be reversed. However, when the active matrix type liquid crystal display device performs a display operation with a multi-phase image signal,
Simply by reversing the shift direction of the horizontal shift register provided in the horizontal drive unit 2, a pixel group in units of a group of pixels of the number corresponding to the number of phases of the image signal in the horizontal direction is set. Although the arrangement order is reversed, since the arrangement order of the pixels in each pixel group is not reversed,
Normal images cannot be displayed.

In the active matrix type liquid crystal display device configured to perform the display operation by supplying the multi-phased image signal, the image direction in the horizontal direction of the image projected on the screen is provided. In order to allow a normal image to be projected on the screen even if it is reversed, a group of pixels consisting of a number of pixels corresponding to the number of phases of the image signal in the horizontal direction is used as described above. Of the image signals to the active matrix type liquid crystal display device so that the arrangement order of the pixel groups to be set is reversed and the arrangement order of the pixels in each pixel group is also reversed. It is necessary to change the supply state.

By the way, there is provided one image signal supply device for supplying a multi-phase image signal to an active matrix type liquid crystal display device in which a display operation is performed by the multi-phase image signal. In the case of being configured as an integrated circuit, the number of input / output data terminals in the integrated circuit increases, and it is necessary to provide a large number of signal switching means in the integrated circuit. This results in higher costs. Further, when the image signal supply device for supplying the multi-phase image signal to the active matrix type liquid crystal display device is configured as divided into a plurality of integrated circuits, Since it is necessary to exchange data between a plurality of divided integrated circuits in order to switch the image direction in the horizontal direction of the projected image on the screen as described above, input / output data terminals in each integrated circuit are required. The problem was that the cost increased and the cost increased.

[0016]

According to the present invention, a liquid crystal is sealed between a pair of substrates, a common electrode is arranged on one of the pair of substrates, and a common electrode is arranged on the other substrate. (P horizontal x Q vertical) Pixel electrodes provided individually corresponding to the pixels and storage elements connected to the above-mentioned pixel electrodes are separated into N phases (N is a natural number of 2 or more). (P / N) N signal lines for supplying the multi-phased image signal to the storage element and Q address lines for selecting the storage element are provided. ,
For a liquid crystal display device in which light modulation by liquid crystal is performed based on the electric charge stored in the storage element in accordance with the voltage of each phase of the multi-phased input image signal, display of the liquid crystal display device is performed. A single-phase signal processing circuit group having an N-sequence signal processing circuit that individually performs signal processing on the image signal for each phase of the target multi-phased N-phase image signal has been polyphased. An image signal supply device for supplying an N-phase image signal, wherein each of the N-series signal processing circuits constituting the one signal processing circuit group has an input side for each one-series signal processing circuit. A display direction inverting section for selecting one of the outputs of the two data latches and supplying the selected data to a subsequent circuit; Data provided by two One of the latches is supplied with a single-phase image signal indicated by a different specific one of the N-phase image signals indicated by phase numbers # 1, # 2,. In addition, for the other of the two data latches provided on the input side of each of the series of signal processing circuits, the sum of the phase number and the number is n + 1.
A specific one-phase image signal indicated by a numerical phase number is supplied. Further, in response to the switching of the display order of the pixels in the horizontal direction in the liquid crystal display device between the forward and reverse, the one- A display is performed by a display direction inverting unit in each signal processing circuit of the signal processing circuit group so that an image signal of a predetermined phase is switched to an image signal to be subjected to signal processing. To supply a multi-phased image signal to a liquid crystal display device in which the above-mentioned is performed.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a liquid crystal display device for displaying images by using a multi-phase image signal according to the present invention; This will be described in detail. FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a supply device of a multi-phase image signal for a liquid crystal display device in which display is performed by a multi-phase image signal according to the present invention. The apparatus for supplying a multi-phase image signal to a liquid crystal display device that performs display by using a multi-phase image signal according to the present invention is an N-phase (N is 2 or more) target to be displayed by the liquid crystal display device. (Numerical number), and is provided with an N-sequence signal processing circuit provided so as to individually perform signal processing on an image signal for each phase of an image signal divided into polyphases.

In the supply device of the multi-phase image signal shown in FIG. 1, the multi-phase image signal to be displayed by the liquid crystal display device is a four-phase (N = 4) image signal. In this case, four series of signal processing circuits provided so as to individually perform signal processing on image signals for each phase (each series is distinguished by A, A, B, C, and D)
FIG. 3 illustrates a configuration example in the case where the signal processing circuit group SAD is configured. Each of the series of signal processing circuits constituting the signal processing circuit group includes two input data latches 11 and 12 and one of the two input data latches 11 and 12. Display direction inverting unit 1 for switching and selecting data latched by the input data latch
3, a gamma correction unit 14, and a shading correction unit 15
, A gain adjustment unit 16 and a digital-to-analog converter 17.

The four signal processing circuits provided in the signal processing circuit group SAD are divided into a first signal processing circuit (A), a second signal processing circuit (B), and a third signal processing circuit from above. The circuit (C) and the fourth signal processing circuit (D) are called a signal processing circuit group SA as shown in FIG.
The first input data latch 11A of the two input data latches 11A and 12A in the first signal processing circuit (A) D has a first phase image signal (figure 1 in FIG. 1) of a four phase image signal. It is indicated by # 1 at the upper left corner, where # 1 indicates the image signal of the first phase, which is also used as the phase number.
This is the same for # 2 to # 4 described later), and the other input data latch 12A supplies a fourth-phase image signal (# at the upper left corner in FIG. 1) of the four-phase image signal.
4).

Further, one of the two input data latches 11B and 12B in the second signal processing circuit (B) of the signal processing circuit group SAD is one of the input data latches 11B.
The second phase image signal in the four phase image signal (FIG. 1)
The upper left of the middle is supplied with # 2), and the other input data latch 12B is supplied with the third phase image signal of the four-phase image signal (shown as # 3 at the upper right end in FIG. 1). Is done. Further, two input data latches 11 in the third signal processing circuit (C) of the signal processing circuit group SAD described above.
One of the input data latches 11C of C and 12C has:
A third phase image signal (shown by # 3 at the upper left corner in FIG. 1) of the four phase image signal is supplied to the other input data latch 12C, and a second phase image signal of the four phase image signal is supplied to the other input data latch 12C. (Indicated by # 2 at the upper right end in FIG. 1).

Further, the above-described signal processing circuit group SA
One of the two input data latches 11D and 12D in the D fourth signal processing circuit (D) has a fourth phase image signal (figure 1 in FIG. 1) of the four phase image signal. The upper left end is supplied with # 4), and the other input data latch 12D is supplied with the first phase image signal (shown as # 1 at the upper right end in FIG. 1) of the four-phase image signal. .

That is, two data latches 11 are provided on the input side of each one-series signal processing circuit in the N-series signal processing circuits (n number of signal processing circuits) constituting the signal processing circuit group. , 12, for example, the data latch 11, the phase numbers # 1, # 2,.
A single-phase image signal indicated by a different one specific phase number in the N-phase image signal indicated by
In addition, for the other data latch 12 of the two data latches 11 and 12 provided on the input side of each of the series of signal processing circuits described above, the sum of the phase number and the numerical value of the phase number is set to a value. A specific 1 indicated by a numerical phase number such that it becomes n + 1
The phase image signal is supplied. The image signal of each phase input to each of the data latches 11 and 12 is digital image data having a predetermined number of bits.

"Positive" described between each input data latch 11, 12 and the display direction inverting unit 13 in FIG.
The notation of “positive” in the notation of “(reverse)” indicates that the display direction reversing unit displays “positive” in the figure when a projection display device is installed on the front side of the screen and an image is displayed on the screen. Input data latch 1 that outputs the data of the
This is used to explain that the output data of No. 1 is selected and given to the subsequent circuit, and the notation “(reverse)” in the figure indicates that the projection display device is installed on the back side of the screen. When displaying an image on the screen,
The display direction inversion unit is used to explain that the output data of the input data latch 12 that outputs the data indicated as (reverse) in the drawing is selected and given to the subsequent circuit.

When the display direction inverting unit selects the output data of the input data latch which outputs the data indicated as positive, the amplifier 18 shown on the right side of FIG. Outputs image signals of the phases denoted by # 1, # 2, # 3, and # 4.
When the output data of the input data latch that outputs the data indicated as (reverse) is selected, the amplifiers shown on the right side of FIG. 1 output (# 1) and (# 2). , (#
3) and (# 4) are output. Note that the notation of # 1, # 2, # 3, and # 4 and the notation of (# 1), (# 2), (# 3), and (# 4) are the same as the positive, ( It is adopted in correspondence with the notation of (reverse) to facilitate explanation.

When the projection type display device is installed on the front side of the screen to display an image on the screen, the projection type display device is provided in the signal processing circuit group SAD by a switching control signal supplied from a control unit (not shown). Each of the display direction inverting units 13 provided in the four series of signal processing circuits described above selects output data of the corresponding data latch 11 and performs gamma correction on the output data. To the unit 14. When the projection type display device is installed on the back side of the screen to display an image on the screen, the projection type display device is provided in the signal processing circuit group SAD by a switching control signal supplied from a control unit (not shown). The display direction inverting units 13 provided in the four series of signal processing circuits select the output data of the data latches 12 provided correspondingly, and output the selected data to the subsequent gamma correction unit 14. To supply.

As described above, the image data selected by the display direction inverting unit 13 provided in each signal processing circuit of an individual series is converted into the gamma correction unit 14 by the gamma correction unit 14.
After a well-known image signal processing operation is performed in the shading correction unit 15 and the gain adjustment unit 16 subsequent thereto, the digital / analog converter 17 converts the image signal into an analog signal image signal. The image signals for each phase of the image signals output from the signal processing circuits of the respective series are amplified by individual amplifiers 18 and then supplied to the horizontal drive unit 2 via the transmission line 8.

The image signals # 1, # 2, # 3, and # 4 for each phase when the projection display device is installed on the front side of the screen to display an image on the screen are shown in FIG.
, # 1, # 2, # 3, # 4 on the right side, ie, the first phase image signal # 1 is transmitted by the transmission line 8 and the second phase image signal # 2 is transmitted by the transmission line 8 and the third phase image signal #
3 is transmitted by the transmission line 8, and the fourth-phase image signal # 4 is supplied to the horizontal driving unit 2 via the transmission line 8 in a state of being transmitted by the transmission line 8.

When the projection display device is installed on the back side of the screen to display an image on the screen, image signals # 1, # 2, # 3, and # 4 for each phase are shown on the right side of FIG. The state described as (# 1), (# 2), (# 3), (# 4), that is, the first phase image signal (# 1) is transmitted by the transmission line 8, and , Second
The phase image signal (# 2) is transmitted by the transmission line 8, the third phase image signal (# 3) is transmitted by the transmission line 8, and the fourth phase image signal (# 4) is transmitted by the transmission line. 8
Transmitted by

When an image is displayed on the screen by installing a projection display device on the front side of the screen, a shift register provided in the horizontal drive unit 2 from the drive signal source 4 via the transmission line 6 is used. 9 is supplied to the shift register 9 by the shift direction control signal R / L-CTL.
Performs a shift operation in the positive direction, and the shift register 9 outputs the output line # 1H →
The outputs are transmitted in the order of # 2H → # 3H... # 480H.

When an image is displayed on a screen by installing a projection display device on the back side of the screen,
The shift register 9 performs a shift operation in the reverse direction by the shift direction control signal R / L-CTL supplied from the drive signal source 4 to the shift register 9 provided in the horizontal drive unit 2 via the transmission line 6. Then, the shift register 9 outputs the output line # 480H →
... Outputs are transmitted in the order of # 3H → # 2H → # 1H.

When an image is displayed on the screen by installing a projection display device on the front side of the screen, the shift register 9 performs a forward shift operation as described above, and the output lines # 1H to # 2H. The outputs are transmitted in the order of # 3H... # 480H, and the image signals of each phase supplied to the horizontal drive unit 2 via the transmission line 8 are the first-phase image signals # 1 8, the second phase image signal # 2 is transmitted by the transmission line 8, and the third phase image signal # 3 is transmitted by the transmission line 8;
The phase image signal # 4 is transmitted to the horizontal drive unit 2 by the transmission line 8.
The active matrix type liquid crystal display device can display an image in a state where a normal image can be projected on a screen.

When an image is displayed on a screen by installing a projection display device on the back side of the screen,
As described above, the shift register 9 performs the reverse shift operation, and the output lines # 480H... # 3H → # 2H → # 1
H, and the image signal of each phase supplied to the horizontal drive unit 2 via the transmission line 8 is transmitted through the transmission line 8 for the image signal # 1 of the first phase. The second phase image signal # 2 is transmitted by the transmission line 8, the third phase image signal # 3 is transmitted by the transmission line 8, and the image of the fourth phase image signal # 4 is further transmitted. Since the signal is supplied to the horizontal drive unit 2 by the transmission line 8, the active matrix type liquid crystal display device can display an image in a state where a normal image can be projected on a screen.

[0033]

As will be apparent from the above description, the apparatus for supplying a multi-phase image signal to a liquid crystal display device according to the present invention for performing display by using a multi-phase image signal is a liquid crystal display. One signal having an N-sequence signal processing circuit provided to individually perform signal processing on the image signal for each phase of the multi-phased N-phase image signal to be displayed by the device Two data latches are respectively provided on the input side of each one-series signal processing circuit in the N-series signal processing circuits constituting the processing circuit group,
A display direction inverting unit for selecting one of the outputs of the two data latches and supplying the selected output to a subsequent circuit; and two data latches provided on the input side of each of the one series of signal processing circuits. Phase number # for one of the latches
One-phase image signals indicated by different specific one-phase numbers in the N-phase image signals indicated by 1, # 2... #N are supplied to the respective one-series signal processing circuits. For the other of the two data latches provided on the side, a specific one-phase image signal indicated by a numerical phase number such that the sum of the numerical values of the above-mentioned phase numbers is n + 1 In addition, in response to the switching of the display order of the pixels in the horizontal direction in the liquid crystal display device, the display direction inverting unit in each signal processing circuit in the one signal processing circuit group described above causes a predetermined phase. The display is performed by a multi-phased image signal which is switched so that the image signal is an image signal to be subjected to signal processing. Install and set Inverting the orientation of the image in the horizontal direction required when displaying an image on the screen or installing a projection display device on the back side of the screen and displaying the image on the screen In order to display a normal image by inverting the arrangement order of the pixel groups in units of a group of pixels corresponding to the number of phases of the image signal and also inverting the arrangement order of the pixels in each pixel group Can be simplified.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a supply device of a multi-phase image signal for a liquid crystal display device that performs display by using a multi-phase image signal.

FIG. 2 is a block diagram illustrating a schematic configuration of an active matrix type liquid crystal display device to which a multi-phase image signal is supplied and a driving circuit.

FIG. 3 is a block diagram illustrating a schematic configuration of an active matrix liquid crystal display device to which a multi-phase image signal is supplied and a part of a driving circuit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Active matrix type liquid crystal display device, 2 ... Horizontal drive part, 3 ... Vertical drive part, 4 ... Drive signal source, 5 ... Image signal source, 6-8 ... Transmission line, 9 ... Horizontal shift register, 1
0: Level shifter, 11, 12: Data latch, 13:
Display direction inverting unit, 14 gamma correction unit, 15 shading correction unit, 16 gain adjustment unit, 17 digital-to-analog converter, 18 amplifier, SAD signal processing circuit group,
SW ... Switch,

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI H04N 9/31 H04N 9/31 Z (58) Field surveyed (Int.Cl. ⁷ , DB name) G09G 3/36 G02F 1 / 13 G02F 1/133 G09G 3/20 H04N 5/74 H04N 9/31

Claims (1)

(57) [Claims] 1. A liquid crystal is sealed between a pair of substrates,
A common electrode is arranged on one of the pair of substrates, and (P × H × Q) is disposed on the other substrate.
) Pixels and a memory element connected to the pixel electrode and N-phase (N is a natural number of 2 or more) to form a multi-phase. (P /) for supplying an image signal to the above-described storage element.
N) N signal lines and Q address lines for selecting storage elements are provided, and the storage is performed in accordance with the voltage of each phase of the multi-phase input image signal. An image for each phase of a polyphased N-phase image signal to be displayed by the liquid crystal display device for a liquid crystal display device in which light modulation by liquid crystal is performed based on the electric charge stored in the element. An image signal supply apparatus for supplying a multi-phased N-phase image signal from one signal processing circuit group having an N-sequence signal processing circuit for individually performing signal processing on a signal. In each of the N-series signal processing circuits constituting the signal processing circuit group of (1), two data latches and one of the outputs of the two data latches are selected on the input side of each one-series signal processing circuit. Display direction supplied to subsequent circuits Preparative provided, also, with respect to those of one of the data latches are provided two by two on the input side of the signal processing circuits of the 1 series and above, the phase number # 1, # 2 ... # n
Supplies one-phase image signals indicated by different specific one-phase numbers in the N-phase image signals indicated by, and two two-phase image signals provided on the input side of each one-series signal processing circuit described above. The other one of the data latches is supplied with a specific one-phase image signal represented by a numerical phase number such that the sum of the numerical value and the numerical value of the above-mentioned phase number becomes n + 1. In response to the switching of the display order of the pixels in the horizontal direction between the normal and reverse directions, the image signal of a predetermined phase is subjected to signal processing by the display direction inverting unit of each signal processing circuit in the one signal processing circuit group. An apparatus for supplying a multi-phase image signal to a liquid crystal display device in which display is performed by a multi-phase image signal which is switched so as to be changed to an image signal to be displayed.