WO2010084619A1

WO2010084619A1 - Liquid crystal display device, driving circuit, and driving method

Info

Publication number: WO2010084619A1
Application number: PCT/JP2009/051206
Authority: WO
Inventors: 中西　秀一; 加藤　厚志; 飯坂　英仁; 宏行保坂; 拓北川
Original assignee: Ｎｅｃディスプレイソリューションズ株式会社; セイコーエプソン株式会社
Priority date: 2009-01-26
Filing date: 2009-01-26
Publication date: 2010-07-29
Also published as: JPWO2010084619A1; JP5413987B2

Abstract

Provided is a technique for applying an overdriving scheme to a field sequential color liquid crystal display device. A liquid crystal display device (1) comprises: a correction means (3) for receiving a plurality of video signals and outputting corrected signals including a plurality of corrected image data sets; an output control means (4) for outputting the corrected signals sequentially one by one; an irradiation means (5) for emitting a color light corresponding to the original video signals of the corrected signals every time one field of the corrected signals is output from the output control means; and a liquid crystal display device (2) including a plurality of pixels to which the corrected image data set included in the corrected signal is supplied and modulating and outputting the light from the irradiation means (5). The correction means (3) corrects the image data included in the video signals to obtain the corrected image data sets, based on the order of supplying the corrected image data sets within each field and other image data that has been the source of other corrected image data set supplied, immediately before or after the corrected image data set, to a pixel to which the corrected image data set is supplied, and outputs the corrected signals including the corrected image data sets.

Description

Liquid crystal display device, driving circuit and driving method

The present invention relates to a liquid crystal display device, a liquid crystal display element driving circuit, a color image generation method, and a liquid crystal display element driving method.

Various systems are known as color display systems for liquid crystal display devices such as projectors or direct-view displays.

Patent Document 1 describes a single-plate color liquid crystal display device. The single-plate color liquid crystal display device includes a pixel having an R color (red) color filter, a pixel having a G color (green) color filter, and a pixel having a B color (blue) color filter. Color display using these pixels.

Patent Document 2 describes a liquid crystal display device adopting an FSC (Field Sequential Color) system as a color display system.

In the FSC type liquid crystal display device, light of different colors is sequentially irradiated onto one monochrome liquid crystal display element, and the display image of the liquid crystal display element is synchronized with the switching of light (color). The image can be switched according to the color.

The following describes the FSC method.

In the FSC system, one frame period constituting one screen is divided into a plurality of color field periods according to the color of the irradiation light.

For each color field, an image corresponding to the color of the color field is formed on one monochrome liquid crystal display element, and light having the color of the color field is irradiated to the liquid crystal display element.

The light irradiated to the liquid crystal display element is modulated and output by an image formed on the liquid crystal display element.

In the FSC method, since the field switching timing is shorter than the period of one frame, a plurality of modulated lights sequentially output from the liquid crystal display element are recognized as one color image by human eyes.

In the FSC system, it is necessary to switch the display image of the liquid crystal display element for each field that is a period shorter than one frame. For this reason, a quick response is required for the liquid crystal display element.

In each pixel in a liquid crystal display element, a p-Si (polycrystalline silicon) TFT (Thin Film Transistor) circuit is often formed as an operation control element. The TFT circuit is used to apply image data in the video signal to the liquid crystal in the pixel.

In many cases, the plurality of pixels in the liquid crystal display element are arranged in a matrix and scanned as follows. The plurality of pixels are selected in order for each row. The image data is sequentially transferred to a plurality of selected pixels in the same row. For this reason, a difference occurs in the transfer timing (supply timing) of the image data between the pixels in the liquid crystal display element.

FIG. 1 is an explanatory diagram for explaining a frame, a color field, and a pixel scanning timing in the FSC system.

In FIG. 1, one frame (Frame) has three colors including a field R (Field-R: red field), a field G (Field-G: green field), and a field B (Field-B: blue field). It is divided into fields.

All the pixels in the liquid crystal display element are scanned in order from the top row to the bottom row in each color field.

Many liquid crystal display devices have the following characteristics.
[1] The liquid crystal display element has a slow optical response (light transmittance response).
[2] Since the p-Si TFT circuit formed on the liquid crystal display element has a low operating frequency, it takes time to transfer the video signal.
[3] When the image data is transferred to the pixel by the TFT circuit, the image data is immediately applied to the liquid crystal in the pixel.
[4] All the pixels of the liquid crystal display element are simultaneously illuminated with the same color light.
[5] Response characteristics of light transmittance are different between a change from black to white and a change from white to black.
[6] The response characteristic of the light transmittance varies depending on the wavelength.

FIG. 2 is an explanatory diagram for explaining a malfunction phenomenon in the FSC method due to the features [1] to [4].

Also in FIG. 2, one frame is divided into three color fields including field R (Field-R), field G (Field-G), and field B (Field-B).

During the period of field R, a video signal corresponding to R color (hereinafter referred to as “R color video signal”) is transferred to a liquid crystal display element (LCD). Within the period of field G, a video signal corresponding to G color (hereinafter referred to as “G color video signal”) is transferred to the liquid crystal display element. Within the period of field B, a video signal corresponding to B color (hereinafter referred to as “B color video signal”) is transferred to the liquid crystal display element.

The R color video signal includes a plurality of R color image data that can correspond one-to-one to the pixels of the liquid crystal display element. Each of the R color image data (hereinafter referred to as “R color image data”) is image information (video information) of a corresponding pixel, and is data indicating a gradation.

The G color video signal includes a plurality of image data for G color that can correspond one-to-one to the pixels of the liquid crystal display element. Each of the G color image data (hereinafter referred to as “G color image data”) is image information (video information) of a corresponding pixel, and is data indicating a gradation.

The B color video signal includes a plurality of B color image data that can correspond one-to-one to the pixels of the liquid crystal display element. Each of the B-color image data (hereinafter referred to as “B-color image data”) is image information (video information) of a corresponding pixel, and is data indicating a gradation.

Graph A is a graph showing a change in light transmittance at a pixel to which image data is first transferred among a plurality of pixels in each color field.

Graph B is a graph showing a change in light transmittance at a pixel to which image data is transferred last among a plurality of pixels in each color field.

R-color LED light source lighting control, G-color LED light source lighting control, and B-color LED light source lighting control emit light of R color and LED (Light Emitting Diode) and G color light. This is light emission control of each color LED using a light source (light source constituting a lighting device) including an LED capable of emitting light of B color and an LED capable of emitting light of B color.

LCD light transmittance indicates the light transmittance of the pixels in the liquid crystal display element.

As shown in FIG. 2, graph A and graph B have the same waveform but are out of phase. This phase shift depends on the position of the pixel in the liquid crystal display element, that is, the transfer timing of image data to each pixel.

As shown in the waveforms of the graph A and the graph B, according to the features [1] to [3], in each pixel, after the image data is transferred to the pixel, the light transmittance of the pixel is changed to the image data. It takes time to achieve the appropriate light transmittance.

Therefore, the light transmittance of each pixel may differ at a predetermined timing such as when the light source is turned on due to a shift in the transfer timing of image data to each pixel and the features [1] to [3]. .

Furthermore, when the feature [4] is combined, the amount of light passing through each pixel may be different (the area of the hatched part a and the area of the hatched part b are different). That is, the brightness differs for each pixel.

For this reason, in the case of the FSC method, the color tone and gradation reproducibility differ depending on the position of the liquid crystal display element in the screen.

The liquid crystal display device is a so-called hold type that works to hold the display until the image data is updated.

The hold type is said to have poor video quality compared to the impulse type, which has a short time to illuminate the pixels with respect to the cycle of updating the image data. As an improvement measure, it is known to shorten the update cycle of image data.

However, as the image data update period is shortened according to the features [1] to [4], the difference in gradation reproducibility increases depending on the position of the liquid crystal display element in the screen.

Patent Documents 3 and 4 describe an FSC liquid crystal display capable of improving the problem of gradation reproducibility caused by the shift in the transfer timing of image data to each pixel and the features [1] to [4]. An apparatus is described.

In the FSC liquid crystal display device described in Patent Document 3 and the FSC liquid crystal display device described in Patent Document 4, light is irradiated when a video signal for displaying the same luminance is applied to all pixels. The image data transferred to each pixel is corrected so that the light transmittance at each pixel becomes equal.

In Patent Documents 3 and 4, there is no description that image data (video signal) corresponding to another color is used when correcting image data (video signal) corresponding to a certain color.

Feature [5] is due to the fact that the response characteristics of the liquid crystal differ depending on the applied electric field.

For example, in the case of a TN (Twisted Nematic) mode liquid crystal, when the applied electric field is increased to change the direction of the liquid crystal and when the applied electric field is weakened to change the direction of the liquid crystal due to the viscoelasticity of the liquid crystal, the latter is Liquid crystal response characteristics are slow.

Therefore, when the liquid crystal display element has a normally white structure, the change from black to white is slower than the change from white to black. For this reason, when the liquid crystal display element has a normally white structure, the moving image quality deteriorates particularly when a dark image changes to a bright image. On the other hand, when the liquid crystal display element has a normally black structure, the moving image quality deteriorates particularly when the light image changes to a dark image.

Also, feature [5] also deteriorates the quality of still images in the FSC system.

For example, in the FSC system, when the liquid crystal display element is normally white, the primary color is not bright, and when the liquid crystal display element is normally black, the complementary color of the primary color is whitish. In the FSC system, when displaying chromatic colors, it may be difficult to reproduce depending on the display color.

Liquid crystal display elements include TN mode, IPS (In-Plane Switching) mode, VA (Vertical Aligned) mode, and OCB (Optically Compensated Bend) mode. In either case, the direction of the liquid crystal (director) is changed by the applied electric field to control the degree of birefringence, and the polarization state of the light passing through the liquid crystal can be changed.

The degree of change in the polarization state depends on the wavelength of light. Therefore, feature [6] occurs. Feature [6] is a factor that further deteriorates the color reproducibility.

Patent Document 5 describes a liquid crystal display device in which a color image is generated by the FSC method, and a level correction circuit provided for each color corrects a video signal of a color corresponding to its own circuit.

This level correction circuit corrects the video signal of the color corresponding to the self in order to correct the characteristic [6] that the response characteristic of the light transmittance varies depending on the wavelength.

Specifically, the liquid crystal display device described in Patent Document 5 includes level correction circuits 32R, 32G, and 32B. The level correction circuit 32R receives the red video signal and corrects the red video signal according to the red response characteristic. The level correction circuit 32G receives the green video signal and corrects the green video signal according to the green response characteristic. The level correction circuit 32B receives the blue video signal and corrects the blue video signal according to the blue response characteristic.

The liquid crystal display device sequentially controls each pixel. Therefore, when attention is paid to a certain pixel, the pixel is accessed only during a part of a predetermined period. During the partial period, a voltage V for controlling the liquid crystal is applied to the pixel.

The pixel has a capacitive component C. Therefore, by applying the control voltage V to the pixel, the charge Q corresponding to the control voltage V is supplied to the pixel electrode.

Generally, the following equation holds.

Q = C × V. . . Formula [1]
The pixel capacitance C has a property of changing depending on the orientation (director) of the liquid crystal of the pixel.

If the voltage continues to be applied until the change in the liquid crystal orientation has settled, charge is supplied when the capacitance changes.

However, when the change in the orientation of the liquid crystal does not converge within the period when the pixel is accessed, the capacitance changes due to the change in the orientation of the liquid crystal after the supply of charges is interrupted. Therefore, the voltage applied to the liquid crystal in the pixel changes from the voltage applied at the time of access.

A so-called overdrive method is known as a method for solving the problem that a desired charge amount cannot be supplied in one access (see Patent Documents 6 and 7).

Overdrive applies the desired amount of charge by applying an excessive voltage to the pixel that is different from the voltage when the director is in the desired director state, depending on which state the director is changed from to which state. This is a method of supplying the pixel.

In addition, overdrive also has an aspect of improving a problem caused by a slow response of the liquid crystal, that is, a problem caused by the feature [1].

The overdrive described in Patent Documents 6 and 7 is a technique for correcting a video signal of a certain frame using the video signal of the immediately preceding frame. That is, Patent Documents 6 and 7 describe techniques for applying overdrive in a liquid crystal display device different from the FCS method.

Patent Document 7 describes a liquid crystal display device that changes the degree of correction of a video signal by overdrive in accordance with the position on the display screen of a pixel to which the video signal is transferred.

In this liquid crystal display device, a plurality of pixels arranged in a matrix are scanned one by one in order from the uppermost row to the lowermost row, and image data is selected for the pixels in the selected row. Are transferred in order.

In this liquid crystal display device, the image data transferred to the pixel located at the center of the display screen that is easily watched is corrected by overdrive rather than the image data transferred to the pixel located at the edge of the display screen. Increase the degree.

Patent Document 7 describes a three-plate color liquid crystal display device to which overdrive is applied.

FIG. 3 is a block diagram showing a three-plate color liquid crystal display device 100 to which overdrive is applied.

In FIG. 3, a three-plate color liquid crystal display device 100 includes an R color frame memory 101R, a G color frame memory 101G, a B color frame memory 101B, an R color overdrive control unit 102R, and a G color. Overdrive control unit 102G, B color overdrive control unit 102B, R color liquid crystal display element 103R, G color liquid crystal display element 103G, and B color liquid crystal display element 103B.

The R color frame memory 101R, the R color overdrive control unit 102R, and the R color liquid crystal display element 103R are devices of the R color system. The G color frame memory 101G, the G color overdrive control unit 102G, and the G color liquid crystal display element 103G are devices of the G color system. The B color frame memory 101B, the B color overdrive control unit 102B, and the B color liquid crystal display element 103B are devices of the B color system.

The R color liquid crystal display element 103R displays an image corresponding to the R color. The G color liquid crystal display element 103G displays an image corresponding to the G color. The B color liquid crystal display element 103B displays an image corresponding to the B color.

In overdrive, the voltage applied to the pixel (correction signal) is controlled according to the target state and start state of the liquid crystal director.

Therefore, each

overdrive control unit

102R, 102G, and 102B inputs the video signal of its own frame to be displayed and the video signal of the previous frame read from the same frame memory, A correction signal for driving the liquid crystal display element is generated.

Regardless of the pixel, the pixel displays an image corresponding to one color and always receives the same illumination light. The three-plate type color liquid crystal display device 100 is overdriven in accordance with the state transition of the liquid crystal director between frames, which is the video update cycle.
JP 2000-330084 A JP 2006-235443 A JP 2004-61670 A JP 2008-165233 A JP 2002-148484 A JP 2002-351409 A JP 2007-199418 A

In Patent Documents 6 and 7, there is a description about overdrive, but there is no description that overdrive is used in an FSC liquid crystal display device.

When an overdrive such as that disclosed in Patent Document 6 or 7 is applied to an FSC type liquid crystal display device, if attention is paid to a certain pixel, since the color displayed by the pixel is not one, it is a color switching period. Overdrive is performed according to the state transition of the liquid crystal director at the time of field switching.

Therefore, when applying overdrive in an FSC liquid crystal display device, it is necessary to use a video signal of another color in order to correct a video signal of a certain color.

In Patent Documents 3 and 4, when a video signal for displaying the same luminance is applied to all the pixels, the light is transmitted to each pixel so that the light transmittance in each pixel is equal when the light is irradiated. Although an FSC liquid crystal display device that corrects the image data to be displayed is described, when correcting a video signal (image data) corresponding to a certain color, the video signal (image data) corresponding to another color is corrected. There is no statement to use.

For this reason, the image data correction technique described in Patent Document 3 or 4 cannot be used as an overdrive correction technique in an FSC liquid crystal display device.

The level correction circuit described in Patent Document 5, specifically, a level correction circuit that accepts only a video signal of a color corresponding to its own circuit and corrects the video signal of that color is also an FSC liquid crystal display device. Cannot be used as a correction circuit for overdrive.

Patent Document 1 describes a single-plate color liquid crystal display device, but does not describe an FSC liquid crystal display device.

Patent Document 2 describes an FSC type liquid crystal display device, but when correcting a video signal (image data) corresponding to a certain color, a video signal (image data) corresponding to another color is used. There is no statement to that effect.

In addition, even when overdrive is applied to an FSC liquid crystal display device, it is considered that there is a problem in gradation reproducibility due to a shift in the transfer timing of image data to each pixel and a slow response of the liquid crystal. .

For this reason, when overdrive is applied to an FSC liquid crystal display device, there is a problem in that there is a problem of gradation reproducibility due to a shift in the transfer timing of image data to each pixel and a slow response of the liquid crystal Occurs.

Note that none of Patent Documents 1 to 7 describes a technology that is a prerequisite for the occurrence of this problem, specifically, a technology that applies overdrive in an FSC liquid crystal display device.

For this reason, the techniques described in Patent Documents 1 to 7 naturally transfer the image data to each pixel when the above-described problem, specifically, overdrive is applied to the FSC liquid crystal display device. The problem that the problem of gradation reproducibility due to the timing shift and the slow response of the liquid crystal occurs has not been solved.

An object of the present invention is to provide a liquid crystal display device, a liquid crystal display element drive circuit, a color image generation method, and a liquid crystal display element drive method capable of solving the above-described problems.

When the liquid crystal display device according to the present invention receives a plurality of video signals corresponding to a plurality of colors and having a plurality of image data, a plurality of corrected image data obtained by correcting each image data in the video signal for each of the video signals. A correction unit that outputs a correction signal, an output control unit that sequentially outputs a plurality of correction signals output from the correction unit one by one, and each time the correction signal is output from the output control unit Each time the correction signal is output from the output control means, the irradiation means for emitting light of a color corresponding to the video signal that is the source of the correction signal, and a plurality of pixels. Each corrected image data is sequentially supplied to a pixel corresponding to the corrected image data among the plurality of pixels, and the light from the irradiation unit is changed using the plurality of pixels to which the corrected image data is supplied. And the liquid crystal display element that outputs the image data, and the correction means supplies each image data in the video signal, the order of supply of the corrected image data obtained by correcting the image data in the liquid crystal display element, and the correction A correction signal having a plurality of corrected image data corrected based on other image data that is the basis of other corrected image data supplied immediately before or immediately after the corrected image data to pixels corresponding to the image data. Output.

The drive circuit according to the present invention has a plurality of pixels, and each time a correction signal having a plurality of correction image data is received, each correction image data in the correction signal is sequentially input to the correction image of the plurality of pixels. A liquid crystal display element that supplies a pixel corresponding to data and modulates and outputs light of a color corresponding to a video signal that is a source of the correction signal using a plurality of pixels to which the correction image data is supplied. When the drive circuit receives a plurality of video signals corresponding to a plurality of colors and having a plurality of image data, each of the video signals has a plurality of corrected image data obtained by correcting each image data in the video signal. Correction means for outputting a correction signal; and output control means for outputting a plurality of correction signals outputted from the correction means to the liquid crystal display element one by one in order, Each image data in the image signal is supplied to the pixel corresponding to the corrected image data immediately before or after the corrected image data in the order of supply of the corrected image data obtained by correcting the image data in the liquid crystal display element. A correction signal having a plurality of corrected image data corrected based on the other image data that is the basis of the other corrected image data is output.

A color image generation method according to the present invention is a color image generation method performed by an FSC liquid crystal display device. When a plurality of video signals corresponding to a plurality of colors and having a plurality of image data are received, the color image generation method is performed for each video signal. A correction signal having a plurality of corrected image data obtained by correcting each image data in the video signal is output, the plurality of correction signals are sequentially output one by one, and the correction signals are output one by one. Each time, the light of the color corresponding to the video signal that is the source of the correction signal is emitted, and each time the correction signal is output from the output control means, each correction image data in the correction signal is output. In order, the plurality of pixels are supplied to the pixel corresponding to the corrected image data, the plurality of pixels to which the corrected image data is supplied are used to modulate and output the light, and the plurality of corrected image data When outputting the correction signal, the image data in the video signal is supplied to the pixels corresponding to the correction image data and the order of supply of the correction image data obtained by correcting the image data to the plurality of pixels. A correction signal having a plurality of corrected image data corrected based on the other image data that is the source of the other corrected image data supplied immediately before or after the corrected image data is output.

The driving method according to the present invention includes a plurality of pixels, and each time a correction signal having a plurality of correction image data is received, the correction image data in the correction signal is sequentially input to the correction image of the plurality of pixels. A liquid crystal display element that supplies a pixel corresponding to data and modulates and outputs light of a color corresponding to a video signal that is a source of the correction signal using a plurality of pixels to which the correction image data is supplied. In the driving method, when a plurality of video signals corresponding to a plurality of colors and having a plurality of image data are received, each of the video signals has a plurality of corrected image data obtained by correcting each image data in the video signal. When outputting a correction signal, outputting the plurality of correction signals one by one to the liquid crystal display element, and outputting a correction signal having the plurality of correction image data, each image in the video signal is output. The order of supply of the corrected image data in the liquid crystal display element, in which the image data is corrected, and other corrected image data supplied to the pixel corresponding to the corrected image data immediately before or after the corrected image data And a correction signal having a plurality of corrected image data corrected based on the other image data that is the source of the above.

According to the present invention, in the FSC liquid crystal display device, it is possible to reduce the difference in gradation reproducibility and the color reproducibility depending on the position in the screen.

It is explanatory drawing for demonstrating the scanning timing of a flame | frame, a color field, and a pixel in a FSC system. It is explanatory drawing for demonstrating the malfunction phenomenon in a FSC system. 1 is a block diagram showing a three-plate color liquid crystal display device 100 to which overdrive is applied. 1 is a block diagram illustrating a liquid crystal display device 1 according to a first embodiment of the present invention. 6 is an explanatory diagram showing an example of a liquid crystal display element 2. FIG. 4 is a block diagram illustrating an example of a correction unit 3. FIG. It is explanatory drawing for demonstrating the relationship between the position in a screen, and correction | amendment operation | movement. 3 is a block diagram illustrating a correction unit 31. FIG. It is explanatory drawing for demonstrating the relationship between the position in a screen, and correction | amendment operation | movement. 3 is a block diagram showing a correction unit 32. FIG. It is the block diagram which showed G color correction part 3G4. It is explanatory drawing for demonstrating the relationship between the position in a screen, and correction | amendment operation | movement. FIG. 6 is a block diagram illustrating a correction unit 33. It is explanatory drawing for demonstrating the relationship between the position in a screen, and correction | amendment operation | movement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Liquid crystal display element 2a Pixel 2b Gate driver 2c Source driver 2d Scan line 2e Data line 2f Common

line 2g Screen

3, 31, 32, 33 Correction part 3R1, 3R2, 3R3 R color correction part 3G1, 3G2, 3G3 G color correction unit 3B1, 3B2, 3B3 B color correction unit 3G1a to 3G1c, 3G2a to 3G2b, 3G3a to 3G3b, 3G4a to 3G4c LUT storage unit 3G1d selection circuit 3G2c interpolation calculation unit 3G2d coefficient generation unit 3G2e, 3G2f multiplier 3G4e, 3G4f selection circuit 3G4g selection circuit control unit

3G4h output unit

33a, 33b time division multiplexing circuit 33c multicolor correction unit 33d demultiplexer 33e switching unit

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

[First Embodiment]
FIG. 4 is a block diagram showing the liquid crystal display device 1 according to the first embodiment of the present invention.

4, the liquid crystal display device 1 includes a liquid crystal display element 2, a correction unit 3, a data rearrangement unit 4, and an irradiation unit 5. The data rearrangement unit 4 includes a frame memory 4a and a memory control unit 4b. The irradiation unit 5 includes an illumination unit 5a and a timing control unit 5b.

The liquid crystal display device 1 receives a plurality of video signals corresponding to each of a plurality of colors on a one-to-one basis (hereinafter simply referred to as “a plurality of video signals”).

The liquid crystal display device 1 is an FSC liquid crystal display device that displays a color image by sequentially displaying a plurality of color images corresponding to a plurality of video signals.

Each video signal has a plurality of image data. Each image data in the video signal corresponds to each of a plurality of pixels in the liquid crystal display element 2. For this reason, in this embodiment, the order of arrangement of each image data in the video signal is associated with the order of supply to the plurality of pixels in the liquid crystal display element 2.

The liquid crystal display element 2 has a plurality of pixels. When the liquid crystal display element 2 receives the drive signal, the liquid crystal display element 2 uses a plurality of pixels, modulates the light applied to the liquid crystal display element 2 according to the drive signal, and outputs light for forming an image.

When the liquid crystal display device 1 is a projector (projection display device), the light modulated and output by the liquid crystal display element 2 is magnified by a projection optical system (not shown) and is applied to a screen (not shown). Projected. When the liquid crystal display device 1 is a direct view display device, the light modulated and output by the liquid crystal display element 2 reaches the eyes of the user.

FIG. 5 is an explanatory view showing an example of the liquid crystal display element 2.

In FIG. 5, the liquid crystal display element 2 includes a plurality of pixels 2a, a gate driver 2b, a source driver 2c, a plurality of scanning lines 2d, a plurality of data lines 2e, and a common line 2f.

The plurality of pixels 2a are arranged in a matrix. Each pixel 2a has a TFT circuit 2a1 and a liquid crystal capacitor 2a2. The liquid crystal capacitor 2a2 has a configuration in which liquid crystal is interposed between the counter electrodes.

The drain of each TFT circuit 2a1 is connected to one end of a liquid crystal capacitor 2a2 present in the pixel 2a to which the TFT circuit 2a1 belongs. The other end of the liquid crystal capacitor 2a2 is connected to the common line 2f. A common voltage is supplied to the common line 2f.

The gates of the TFT circuits 2a1 existing in the same row are connected to the common scanning line 2d. Each scanning line 2d is connected to the gate driver 2b.

The gate driver 2b starts vertical scanning (selection of scanning lines) for each field according to the vertical synchronizing signal synchronized with the output field synchronization timing, and selects the scanning lines 2d one by one in order according to the horizontal synchronizing signal. Then, a gate drive signal is supplied to the selected scanning line 2d.

The sources of the TFT circuits 2a1 existing in the same column are connected to the common data line 2e. Each data line 2e is connected to the source driver 2c.

The source driver 2c starts horizontal scanning (selection of data line) for each scanning line according to the horizontal synchronization signal, and sequentially selects the data line 2e according to the transfer clock signal.

The source driver 2c selects image data corresponding to the pixel 2a specified by the selected data line 2e and the selected scanning line 2d (corrected image data obtained by correcting the image data in this embodiment). Supplied to the data line 2e.

When a gate drive signal is supplied to the gate of the TFT circuit 2a1, the corrected image data supplied to the source of the TFT circuit 2a1 is supplied to the liquid crystal capacitor 2a2 via the drain of the TFT circuit 2a1. For this reason, the corresponding corrected image data is supplied to the pixel 2a specified by the selected data line 2e and the selected scanning line 2d via the TFT circuit 2a1.

The plurality of scanning lines 2d and the plurality of data lines 2e are arranged while maintaining electrical insulation from each other.

The gate driver 2b and the source driver 2c operate based on a timing signal (vertical synchronization signal) indicating a synchronization timing of the output field supplied from the timing control unit 5b, a horizontal synchronization signal, a transfer clock signal, and the like. Since this operation is a known technique, a detailed description thereof is omitted.

Returning to FIG. 4, the correction unit 3 can be generally called correction means.

The correction unit 3 inputs video signals of a plurality of colors synchronized with a timing signal indicating the synchronization timing of the input frame, and outputs a plurality of correction signals corresponding to the plurality of colors on a one-to-one basis.

In the present embodiment, the correction unit 3 receives a plurality of video signals each time a timing signal generated every frame period is received, and outputs a plurality of correction signals corresponding to the plurality of video signals on a one-to-one basis. Output.

In this embodiment, when the correction unit 3 receives a plurality of video signals, the correction unit 3 outputs, for each video signal, a correction signal having a plurality of corrected image data obtained by correcting each image data in the video signal.

Each corrected image data in the correction signal corresponds to the image data that is the basis of the corrected image data. Since each image data corresponds to each of the plurality of pixels 2 a in the liquid crystal display element 2, each correction image data in the correction signal also corresponds to each of the plurality of pixels 2 a in the liquid crystal display element 2.

Also, each of the corrected image data in the correction signal is supplied to the corresponding pixel. For this reason, in this embodiment, the order of arrangement of each corrected image data in the correction signal is associated with the order of supply to the plurality of pixels 2 a in the liquid crystal display element 2.

In the present embodiment, the correction unit 3 accepts, as a plurality of video signals, an R color video signal corresponding to red, a G color video signal corresponding to green, and a B color video signal corresponding to blue.

The correction unit 3 outputs an R color correction signal corresponding to red, a G color correction signal corresponding to green, and a B color correction signal corresponding to blue as a plurality of correction signals. The correction unit 3 generates an R color correction signal based on the R color video signal, generates a G color correction signal based on the G color video signal, and generates a B color correction signal based on the B color video signal. Generate.

The data rearrangement unit 4 can be generally called output control means.

The data rearrangement unit 4 outputs the plurality of correction signals output from the correction unit 3 to the liquid crystal display element 2 one by one as a drive signal.

In this embodiment, the data rearrangement unit 4 uses the R color correction signal, the G color correction signal, and the B color correction signal as drive signals in the order of the R color correction signal, the G color correction signal, and the B color correction signal. Output to the liquid crystal display element 2. This order can be changed as appropriate.

The frame memory 4a is used as a buffer for rearranging a plurality of correction signals functioning as video signals.

The memory control unit 4b rearranges the plurality of correction signals output from the correction unit 3 in the order of output to the liquid crystal display element 2 on the frame memory 4a.

In this embodiment, the memory control unit 4b performs the R color correction signal, the G color correction signal, and the B color correction signal in the order of the R color correction signal, the G color correction signal, and the B color correction signal on the frame memory 4a. Rearrange.

The memory control unit 4b outputs the R color correction signal, the G color correction signal, and the B color correction signal on the frame memory 4a to the liquid crystal display element 2 as drive signals one by one in the arrangement order. .

The irradiation unit 5 can be generally called irradiation means.

The irradiating unit 5 becomes the source of the correction signal output to the liquid crystal display element 2 each time one of the plurality of correction signals output from the correction unit 3 is output to the liquid crystal display element 2 as a drive signal. The liquid crystal display element 2 is irradiated with light of a color corresponding to the video signal. However, the irradiation unit 5 adjusts the light irradiation timing (period and phase) in consideration of the response of the light transmittance after the drive signal is output to the liquid crystal display element 2.

The illumination unit 5a includes an R color LED that emits red light, a G color LED that emits green light, and a B color LED that emits blue light.

The timing control unit 5b receives a timing signal indicating the synchronization timing of the input frame (hereinafter referred to as “input frame synchronization timing”), and outputs the synchronization timing of the output field (hereinafter referred to as “color frame period”). A timing signal indicating "output field synchronization timing" is generated. In the present embodiment, the input frame synchronization timing and the output field synchronization timing are synchronized, but they may be asynchronous.

The timing controller 5b generates a vertical synchronization signal, a horizontal synchronization signal, and a transfer clock signal synchronized with the output field synchronization timing, and supplies the vertical synchronization signal, the horizontal synchronization signal, and the transfer clock signal to the liquid crystal display element 2. To do.

In the data rearrangement unit 4, the memory control unit 4 b uses the two timing signals (a timing signal indicating the input frame synchronization timing and a timing signal indicating the output field synchronization timing) from the timing control unit 5 b to change the input frame synchronization timing. The writing to the frame memory 4a is controlled in synchronization, and the reading from the frame memory 4a is controlled in synchronization with the output field synchronization timing. Then, the memory control unit 4b applies the R color correction signal, the G color correction signal, and the B color correction signal on the frame memory 4a to the liquid crystal display element 2 as drive signals one by one in the arrangement order. Output.

The liquid crystal display element 2 sequentially receives the R color correction signal, the G color correction signal, and the B color correction signal sequentially output from the data rearrangement unit 4 in synchronization with the output field synchronization timing by the timing signal from the timing control unit 5b. input.

Each time the liquid crystal display element 2 receives a correction signal (drive signal) for each color, each correction in the correction signal is synchronized with the vertical synchronization signal, horizontal synchronization signal, and transfer clock signal from the timing controller 5b. The image data is sequentially supplied to the pixel 2a corresponding to the corrected image data, the direction of the liquid crystal (director) of each pixel 2a is controlled, and each color light sequentially irradiated for each color is converted into the corrected image data. Modulation is performed using a plurality of pixels 2a in which the orientation of the liquid crystal is controlled by supply, and light that forms an image of each color is sequentially generated.

The illumination unit 5a lights up the R color LED, the G color LED, and the B color LED one by one in this order in synchronization with the output field synchronization timing by the timing signal from the timing control unit 5b.

Therefore, in this embodiment, the liquid crystal display device 1 operates as follows.

When the liquid crystal display element 2 is forming an image corresponding to the R color correction signal, the illumination unit 5a turns on the R color LED and irradiates the liquid crystal display element 2 with the R color light.

Thereafter, when the liquid crystal display element 2 is forming an image corresponding to the G color correction signal, the illumination unit 5a turns on the G color LED and irradiates the liquid crystal display element 2 with the G color light.

Thereafter, when the liquid crystal display element 2 forms an image corresponding to the B color correction signal, the illumination unit 5a turns on the B color LED and irradiates the liquid crystal display element 2 with B color light.

Here, the correction unit 3 will be described.

The correction unit 3 supplies each image data in the video signal in the order of supply of the corrected image data obtained by correcting the image data in the liquid crystal display element 2 (hereinafter simply referred to as “supply order”) and the corrected image. Based on other image data (hereinafter simply referred to as “other image data”) that is the source of other corrected image data supplied to the pixel corresponding to the data immediately before or after the corrected image data A correction signal having a plurality of corrected image data corrected is output.

That is, the correction unit 3 outputs, for each video signal, a correction signal having a plurality of corrected image data obtained by correcting each image data in the video signal based on the supply order and other image data.

The function of the correction unit 3 is to improve the reduction in gradation reproducibility and color reproducibility due to the FSC method, and to reduce the difference in gradation reproducibility and color reproducibility depending on the position in the screen. It is.

First, correction for improving the gradation reproducibility and color reproducibility deterioration caused by the FSC method will be described. In the correction unit 3, other image data is used to perform this correction.

As shown in FIGS. 1 and 2, in the FSC system, the change of the liquid crystal director is triggered by the change of the video signal between the color fields. Therefore, data referred to for overdrive is a video signal corresponding to the color of the previous field.

In the liquid crystal display device 1, the color display order (color sequence) in the FSC system is R, G, B. In this case, the G color video signal and the R color video signal in the previous field of the G color video signal are used to correct the G color video signal. Further, a B color video signal in the field may be used. Unless otherwise specified, hereinafter, a case where the color display order (color sequence) in the FSC system is R, G, and B will be described.

In order to realize overdrive by the FSC method, a color display method three-plate projection type liquid crystal display device using simultaneous additive color mixture as shown in FIG. 3 or a color display method using juxtaposed (parallel) additive color mixture is used. The frame memory required in the direct view type liquid crystal display device is not necessarily required.

A color display type liquid crystal display device using simultaneous additive color mixing has three liquid crystal display elements that individually modulate R, G, and B colors, and superimposes the modulated image light of each color. A liquid crystal display device for display. This type of projection type liquid crystal display device such as a projector is common and is called a so-called three-plate type.

A liquid crystal display device using a color display method using juxtaposed (or juxtaposed) additive color mixing is a plurality of pixels that perform color display by arranging subpixels (subpixels) having R, G, and B color filters in close proximity. A liquid crystal display device.

The state of the liquid crystal director in one field is affected by the state of the liquid crystal director in the previous field, and the state of the liquid crystal director in the next field. In the present embodiment, when viewed from the G color field, the B color field is both the previous field and the next field. Therefore, by correcting the G color video signal, the gradation reproducibility of the B color in the next field can be improved.

For example, when setting the G color correction signal in the correction unit 3 in a situation where the gradation level of the G color video signal is 50% and the gradation level of the B color video signal is 80%, the gradation of the G color correction signal is set. The gray level of the G color video signal is based on the gradation level of the B color video signal 80% (more specifically, the difference between the gray level of the G color video signal and the gray level of the B color video signal). When the level is set to 60%, which is excessively higher than the level 50%, the state of the liquid crystal director in the B color field can be brought closer to the desired state more quickly, and the B color gradation reproducibility can be improved.

Further, for example, when setting the G color correction signal in the correction unit 3 in a situation where the gradation level of the G color video signal is 50% and the gradation level of the B color video signal is 20%, the G color correction signal If the gradation level is set to 40%, which is excessively higher than the gradation level 50% of the G color video signal, as viewed from the gradation level 20% of the B color video signal, the state of the liquid crystal director in the B color field Can be brought closer to the desired state more quickly, and the B color gradation reproducibility can be improved.

These corrections are similar to, but different from, conventional overdrive.

Since the conventional overdrive is a technique of applying an excessive voltage by correcting the image data of the own field (own frame in the three-plate type) using the image data of the previous field (front frame in the three-plate type), When the gradation level of the image data in the video signal of the own field to be improved is 100% or 0%, the gradation reproducibility cannot be improved.

On the other hand, in the method of correcting the image data in the video signal of the color of the own field using the video signal of the color of the next field, the gradation level of the image data in the video signal of the color of the next field to be improved is 100. Even if it is% or 0%, tone reproducibility and color reproducibility can be improved.

Next, correction for reducing the difference in gradation reproducibility and color reproducibility depending on the position in the screen will be described. In order to perform this correction, the correction unit 3 uses the order of supplying corrected image data in the liquid crystal display element 2.

Due to the difference in the supply timing of the corrected image data to each pixel 2a and the slow response of the liquid crystal, a phase difference occurs between the graph A and the graph B as shown in FIG.

In order to reduce this phase difference at the timing of light irradiation, the pixel whose light transmittance corresponds to the image data after the correction image data is supplied to the pixel whose correction image data is supplied more slowly. The correction unit 3 may output corrected image data obtained by correcting each image data so that the time until the light transmittance is reached. That is, the correction unit 3 may correct each image data based on the supply timing (supply order) of the image data to each pixel 2a.

The correction unit 3 outputs, for each video signal, a correction signal having a plurality of corrected image data obtained by correcting each image data in the video signal based on the supply order and other image data. Improves gradation and color reproducibility degradation caused by the FSC method, and reduces differences in gradation and color reproducibility depending on the position in the screen.

FIG. 6 is a block diagram illustrating an example of the correction unit 3.

The correction unit 3 includes an R color correction unit 3R1, a G color correction unit 3G1, and a B color correction unit 3B1.

The R color correction unit 3R1 corresponds to the R color video signal on a one-to-one basis.

The R color correction unit 3R1 corresponds to the R color video signal, the G color video signal corresponding to the color of the next field of the R color, and the timing signal (the input frame synchronization timing signal indicating the input frame synchronization timing and the timing signal). The horizontal synchronization timing signal indicating the horizontal synchronization timing and the pixel clock timing signal indicating the pixel clock timing corresponding to the horizontal synchronization timing signal) are input, and the R color correction signal is output.

The G color correction unit 3G1 has a one-to-one correspondence with the G color video signal.

The G color correction unit 3G1 includes a G color video signal, a B color video signal corresponding to the color of the next field of G color, and a timing signal (input frame synchronization timing signal, horizontal synchronization timing signal, and pixel clock timing signal). To output a G color correction signal.

The B color correction unit 3B1 corresponds to the B color video signal on a one-to-one basis.

The B color correction unit 3B1 includes a B color video signal, an R color video signal corresponding to the color of the next field of B color, and a timing signal (input frame synchronization timing signal, horizontal synchronization timing signal, and pixel clock timing signal). To output the B color correction signal.

The G color correction unit 3G1 includes three LUT (Look-up Table) storage units 3G1a, 3G1b and 3G1c, and a selection circuit (SEL) 3G1d.

Each of the LUT storage units 3G1a, 3G1b, and 3G1c can be referred to as color correction means or storage means. For this reason, the correction unit 3 includes a plurality of color correction means or storage means.

The three LUT storage units 3G1a, 3G1b, and 3G1c all receive the G color video signal and the B color video signal and output the G color correction data.

Each of the LUT storage units 3G1a, 3G1b, and 3G1c is associated with a predetermined order (hereinafter referred to as “corresponding order”) in the order of supply. The correspondence order associated with each of the plurality of LUT storage units 3G1a, 3G1b, and 3G1c is different for each LUT storage unit.

In the present embodiment, the LUT storage unit 3G1a is associated with the first order in the order of supply. The LUT storage unit 3G1c is associated with the last order in the supply order. The LUT storage unit 3G1b is associated with a predetermined order between the first order in the order of supply and the last order in the order of supply.

Each time the LUT storage units 3G1a, 3G1b, and 3G1c receive image data and other image data, they output correction data obtained by correcting the image data based on the other image data and the corresponding order.

In this embodiment, each of the LUT storage units 3G1a, 3G1b, and 3G1c associates image data and other image data with correction data obtained by correcting the image data based on the other image data and the corresponding order. When the image data and other image data are received, correction data associated with the image data and other image data is output.

When the LUT storage units 3G1a, 3G1b, and 3G1c accept the same image data and the same other image data, the correction data output from each of the LUT storage units 3G1a, 3G1b, and 3G1c It is generally different from the correction data output from the storage unit.

When the difference between the common image data and the correction data output from each of the LUT storage units 3G1a, 3G1b, and 3G1c based on the common image data is used as the correction amount, in this embodiment, the LUT storage unit The correction amount in 3G1a is generally smaller than the correction amounts in LUT storage units 3G1b and 3G1c. In the present embodiment, the correction amount in the LUT storage unit 3G1b is generally smaller than the correction amount in the LUT storage unit 3G1c.

The selection circuit 3G1d can be generally called output means.

The selection circuit 3G1d receives the input frame synchronization timing signal, the horizontal synchronization timing signal, and the pixel clock timing signal, and specifies the supply order based on these timing signals.

The selection circuit 3G1d creates and outputs a correction signal having a plurality of correction image data based on a plurality of correction data from each of the LUT storage units 3G1a, 3G1b, and 3G1c based on the order of supply.

In this embodiment, the selection circuit 3G1d receives one correction data from the three correction data received based on the order of supply each time the correction data is received from the three LUT storage units 3G1a, 3G1b, and 3G1c. Data is selected and output as corrected image data.

For a detailed description of the R color correction unit 3R1, in the description of the G color correction LUT storage unit 3G1 described above, “G color correction unit 3G1” is replaced with “R color correction unit 3R1”, and “LUT storage unit 3G1a” is replaced. “LUT storage unit 3R1a” is read, “LUT storage unit 3G1b” is read “LUT storage unit 3R1b”, “LUT storage unit 3G1c” is read “LUT storage unit 3R1c”, and “selection circuit 3G1d” is “selection circuit” 3R1d "," G color video signal "is read as" R color video signal "," B color video signal "is read as" G color video signal ", and" G color correction signal "is read as" R color correction signal ". It can be done by replacing with.

For the detailed description of the B color correction unit 3B1, in the description of the G color correction LUT storage unit 3G1 described above, “G color correction unit 3G1” is replaced with “B color correction unit 3B1” and “LUT storage unit 3G1a” is replaced. “LUT storage unit 3B1a” is read, “LUT storage unit 3G1b” is read “LUT storage unit 3B1b”, “LUT storage unit 3G1c” is read “LUT storage unit 3B1c”, and “selection circuit 3G1d” is “selection circuit” 3B1d, “G color video signal” is read as “B color video signal”, “B color video signal” is read as “R color video signal”, and “G color correction signal” is read as “B color correction signal”. It can be done by replacing with.

However, the characteristics corrected by each LUT storage unit can be different for each color of the video signal.

Next, the operation will be described.

FIG. 7 is an explanatory diagram for explaining the relationship between the position in the screen of the liquid crystal display element 2 and the correction operation.

7, the screen 2g is formed by a plurality of pixels 2a arranged in a matrix within the liquid crystal display element 2 (see FIG. 5).

In FIG. 7, a plurality of pixels 2a are scanned one row at a time in the direction from the uppermost row to the lowermost row of the screen 2g, and the selected pixel 2a corresponds to the pixel 2a. It is assumed that corrected image data to be supplied is supplied in order.

Unless otherwise specified, the order in which the corrected image data is supplied is the order from the upper line to the lower line on the screen 2g.

In the present embodiment, the screen 2g is divided into three areas 2g1, 2g2, and 2g3 according to the order in which the corrected image data is supplied.

First, the operation of the G color correction unit 3G1 will be described.

Each time the selection circuit 3G1d receives each correction data from the three LUT storage units 3G1a, 3G1b, and 3G1c, the correction circuit 3G1d selects one correction data from the three correction data received as correction image data. Select as output.

In the present embodiment, when the selection circuit 3G1d receives correction data having the order supplied to the pixels 2a in the area 2g1 from each of the three LUT storage units 3G1a, 3G1b, and 3G1c, the selection circuit 3G1d receives the correction data from the LUT storage unit 3G1a. The correction data is selected, and the selected correction data is supplied to the image memory control unit 4b as G color correction image data.

The selection circuit 3G1d selects correction data from the LUT storage unit 3G1b when receiving correction data having the order to be supplied to the pixels 2a in the area 2g2 from each of the three LUT storage units 3G1a, 3G1b, and 3G1c. The selected correction data is supplied to the memory control unit 4b as G color correction image data.

The selection circuit 3G1d selects correction data from the LUT storage unit 3G1c when receiving correction data having the order to be supplied to the pixels 2a in the area 2g3 from each of the three LUT storage units 3G1a, 3G1b, and 3G1c. The selected correction data is supplied to the memory control unit 4b as G color correction image data.

Regarding the operation of the R color correction unit 3R1, in the above description of the operation of the G color correction unit 3G1, “G color correction unit 3G1” is replaced with “R color correction unit 3R1”, and “LUT storage unit 3G1a” is replaced with “LUT “LUT storage unit 3G1b” is replaced with “LUT storage unit 3R1b”, “LUT storage unit 3G1c” is replaced with “LUT storage unit 3R1c”, and “selection circuit 3G1d” is replaced with “selection circuit 3R1d”. This can be done by replacing “G color corrected image data” with “R color corrected image data”.

Regarding the operation of the B color correction unit 3R1, in the description of the operation of the G color correction unit 3G1 described above, “G color correction unit 3G1” is replaced with “B color correction unit 3B1”, and “LUT storage unit 3G1a” is replaced with “LUT “LUT storage unit 3G1b” is replaced with “LUT storage unit 3B1b”, “LUT storage unit 3G1c” is replaced with “LUT storage unit 3B1c”, and “selection circuit 3G1d” is replaced with “selection circuit 3B1d”. This can be done by replacing “G color corrected image data” with “B color corrected image data”.

When the memory control unit 4b receives the R color correction signal, the G color correction signal, and the B color correction signal, the memory control unit 4b converts the R color correction signal, the G color correction signal, and the B color correction signal into the R color on the frame memory 4a. The correction signal, the G color correction signal, and the B color correction signal are rearranged in this order.

On the other hand, the timing control unit 5b receives a timing signal indicating the input frame synchronization timing, generates a timing signal indicating the output field synchronization timing obtained by dividing one frame period into three color field periods, and the data rearrangement unit 4 To the liquid crystal display element 2 and the illumination unit 5a.

The timing controller 5b also generates a horizontal synchronization signal corresponding to the output field synchronization timing and a transfer clock signal indicating the supply timing of the corrected image data, along with the vertical synchronization signal synchronized with the output field synchronization timing, and these signals. Is output to the liquid crystal display element 2.

The liquid crystal display element 2 receives the R color correction signal, the G color correction signal, and the B color correction signal sequentially output from the data rearrangement unit 4 in synchronization with the output field synchronization timing by the timing signal from the timing control unit 5b. To do.

The liquid crystal display element 2 sequentially synchronizes the corrected image data in the correction signal with the corrected image in synchronization with the vertical synchronizing signal, horizontal synchronizing signal, and transfer clock signal from the timing control unit 5b. By sequentially supplying the pixel 2a corresponding to the data, the direction of the liquid crystal of each pixel 2a (director) is controlled, and the direction of the liquid crystal is controlled by supplying the corrected image data for each color light sequentially irradiated for each color. Modulation is performed using the plurality of pixels 2a, and light that forms an image of each color is sequentially generated.

For this reason, in the present embodiment, when the liquid crystal display element 2 forms an image corresponding to the R color correction signal, the illumination unit 5a lights the R color LED, and the liquid crystal display element 2 is illuminated with the R color light. When the liquid crystal display element 2 forms an image corresponding to the G color correction signal, the illumination unit 5a lights the G color LED and irradiates the liquid crystal display element 2 with the G color light. When the element 2 is forming an image corresponding to the B color correction signal, the illumination unit 5a turns on the B color LED and irradiates the liquid crystal display element 2 with the B color light.

In this embodiment, the correction unit 3 outputs, for each video signal, a correction signal having a plurality of corrected image data obtained by correcting each image data in the video signal based on the order of supply and other image data.

For this reason, by performing correction using other image data, it becomes possible to improve deterioration of gradation reproducibility and color reproducibility caused by the FSC method, and correction using the order of supply This makes it possible to reduce the difference in gradation reproducibility and color reproducibility depending on the position in the screen.

In this embodiment, each time the LUT storage units 3G1a, 3G1b, and 3G1c receive image data and other image data, the correction data obtained by correcting the image data based on the other image data and the corresponding order is output. To do. Note that the correspondence order associated with each of the plurality of LUT storage units 3G1a, 3G1b, and 3G1c is different for each LUT storage unit.

The selection circuit 3G1d creates and outputs a correction signal having a plurality of correction image data based on a plurality of correction data from each of the LUT storage units 3G1a, 3G1b and 3G1c based on the order of supply.

In this case, it is possible to create and output a correction signal by using a plurality of LUT storage units.

In the present embodiment, each of the LUT storage units 3G1a, 3G1b, and 3G1c stores image data, other image data, and correction data in association with each other, and receives image data and other image data. A storage unit that outputs correction data.

In this case, for example, a correction signal can be created and output by using an LUT.

In the present embodiment, the LUT storage unit 3G1a functions as a first color correction unit whose correspondence order is the first order of the supply order, and the LUT storage unit 3G1c has a correspondence order of the supply order. It functions as the second color correction means which is the last order.

In this case, it is possible to use a color correction unit having characteristics suitable for correcting the image data that is the source of the corrected image data having the most different supply timing. Therefore, it is possible to reduce the largest difference in gradation reproducibility and color reproducibility due to the position in the screen.

In the present embodiment, the LUT storage unit 3G1b is a third color correction unit whose correspondence order is a predetermined order between the first order in the supply order and the last order in the supply order. Function.

In this case, since the screen is divided into three areas for correction, the difference in gradation reproducibility and color reproducibility can be further reduced as compared with the case where the screen is divided into two areas.

In the present embodiment, each of the plurality of color correction units and the selection circuit are provided for each video signal.

In this case, it is possible to correct the image data in accordance with the difference in transmittance characteristics of the liquid crystal display element 2 due to the wavelength of light. Therefore, color reproducibility can be further improved.

Thus, according to the present embodiment, the video signal can be corrected according to the position in the screen, so that the difference in gradation reproducibility and the difference in color reproducibility due to the position in the screen can be reduced.

Further, since correction can be made according to the difference in transmittance characteristics of the liquid crystal display element depending on the wavelength of light, color reproducibility can be further improved.

[Second Embodiment]
In the second embodiment of the present invention, for example, the correction unit 31 shown in FIG. 8 is used as the correction unit 3 of the liquid crystal display device 1 shown in FIG.

In FIG. 8, the correction unit 31 can be generally referred to as correction means.

The correction unit 31 includes an R color correction unit 3R2, a G color correction unit 3G2, and a B color correction unit 3B2.
The R color correction unit 3R2 corresponds to the R color video signal on a one-to-one basis.

The R color correction unit 3R2 includes an R color video signal, a G color video signal corresponding to the color of the next field of the R color, and a timing signal (input frame synchronization timing signal, horizontal synchronization timing signal, and pixel clock timing signal). To output an R color correction signal.

The G color correction unit 3G2 has a one-to-one correspondence with the G color video signal.

The G color correction unit 3G2 includes a G color video signal, a B color video signal corresponding to the color of the next field of G color, and a timing signal (input frame synchronization timing signal, horizontal synchronization timing signal, and pixel clock timing signal). To output a G color correction signal.

The B color correction unit 3B2 corresponds to the B color video signal on a one-to-one basis.

The B color correction unit 3B2 includes a B color video signal, an R color video signal corresponding to the color of the next field of B color, and a timing signal (input frame synchronization timing signal, horizontal synchronization timing signal, and pixel clock timing signal). To output a B color correction signal.

The G color correction unit 3G2 includes two LUT storage units 3G2a and 3G2b, and an interpolation calculation unit 3G2c.

Each of the LUT storage units 3G2a and 3G2b can be called color correction means or storage means. For this reason, the correction unit 31 includes a plurality of color correction means or storage means.

The two LUT storage units 3G2a and 3G2b both receive the G color video signal and the B color video signal and output the G color correction data.

The correspondence order is associated with each of the LUT storage units 3G2a and 3G2b in advance. Note that the correspondence order associated with each of the plurality of LUT storage units 3G2a and 3G2b is different for each LUT storage unit.

In the present embodiment, the LUT storage unit 3G2a is associated with the first order in the order of supply. The LUT storage unit 3G2b is associated with the last order in the supply order.

Each time the LUT storage units 3G2a and 3G2b receive image data and other image data, the LUT storage units 3G2a and 3G2b output correction data obtained by correcting the image data based on the other image data and the corresponding order.

In the present embodiment, each of the LUT storage units 3G2a and 3G2b stores image data and other image data in association with each other and correction data obtained by correcting the image data based on the other image data and the corresponding order. When image data and other image data are received, correction data associated with the image data and other image data is output.

When the LUT storage units 3G2a and 3G2b accept the same image data and the same other image data, the correction data output from each of the LUT storage units 3G2a and 3G2b is output from the other LUT storage units. It is generally different from the correction data.

When the difference between the common image data and the correction data output from each of the LUT storage units 3G2a and 3G2b based on the common image data is used as the correction amount, in this embodiment, the LUT storage unit 3G2a Is generally smaller than the correction amount in the LUT storage unit 3G2b.

Interpolation calculation unit 3G2c can generally be called output means.

Interpolation calculation unit 3G2c receives an input frame synchronization timing signal, a horizontal synchronization timing signal, and a pixel clock timing signal, and specifies the order of supply based on these timing signals.

Interpolation calculation unit 3G2c creates and outputs a correction signal having a plurality of corrected image data based on the order of supply based on a plurality of correction data from each of LUT storage units 3G2a and 3G2b.

In the present embodiment, when the order of supply is different from the correspondence order associated with the LUT storage unit 3G2a or 3G2b, the interpolation calculation unit 3G2c is based on a plurality of correction data from each of the LUT storage units 3G2a and 3G2b. Then, a correction signal having a plurality of corrected image data is generated by interpolation and output.

The interpolation operation unit 3G2c includes a coefficient generation unit 3G2d, two multipliers 3G2e and 3G2f, and an adder 3G2g.

The interpolation calculation unit 3G2c inputs correction data output from each of the two LUT storage units 3G2a and 3G2b, multiplies each correction data by a predetermined coefficient according to the order of the correction data, and adds the multiplication results Then, the addition result is output as G color corrected image data.

The coefficient generation unit 3G2d generates a predetermined coefficient according to the order of the G color correction image data based on the input frame synchronization timing signal, the horizontal synchronization timing signal, and the pixel clock timing signal, Output to multipliers 3G2e and 3G2f.

The multiplier 3G2e multiplies the correction data from the LUT storage unit 3G2a by the coefficient from the coefficient generation unit 3G2d, and outputs the multiplication result to the adder 3G2g.

The multiplier 3G2f multiplies the correction data from the LUT storage unit 3G2b by the coefficient from the coefficient generation unit 3G2d, and outputs the multiplication result to the adder 3G2g.

The adder 3G2g adds the multiplication result of the multiplier 3G2e and the multiplication result of the multiplier 3G2f, and outputs the addition result as G color correction image data.

For the detailed description of the R color correction unit 3R2, in the description of the G color correction unit 3G2, the "G color correction unit 3G2" is replaced with the "R color correction unit 3R2", and the "LUT storage unit 3G2a" is replaced with "LUT "Storage unit 3R2a" is read, "LUT storage unit 3G2b" is read as "LUT storage unit 3R2b", "Interpolation calculation unit 3G2c" is read as "Interpolation calculation unit 3R2c", and "G color video signal" is read as "R color video" “Signal”, “B color video signal” as “G color video signal”, “G color correction signal” as “R color correction signal”, and “Coefficient generation unit 3G2d” as “Coefficient generation unit 3R2d”. "Multiplier 3G2e" is read as "Multiplier 3R2e", "Multiplier 3G2f" is read as "Multiplier 3R2f", "Adder 3G2g" is read as "Adder 3R2g", and "G color corrected image" Data ”to“ R color correction image ” It can be carried out by be read in the data. "

For the detailed description of the B color correction unit 3B2, in the description of the G color correction unit 3G2 described above, “G color correction unit 3G2” is replaced with “B color correction unit 3B2”, and “LUT storage unit 3G2a” is replaced with “LUT “Storage unit 3B2a” is read, “LUT storage unit 3G2b” is read as “LUT storage unit 3B2b”, “Interpolation calculation unit 3G2c” is read as “Interpolation calculation unit 3B2c”, and “G color video signal” is read as “B color video” “Signal”, “B color video signal” as “R color video signal”, “G color correction signal” as “B color correction signal”, and “Coefficient generation unit 3G2d” as “Coefficient generation unit 3B2d”. "Multiplier 3G2e" is read as "multiplier 3B2e", "multiplier 3G2f" is read as "multiplier 3B2f", "adder 3G2g" is read as "adder 3B2g", and "G color corrected image" Data ”to“ B Color Correction Image ” It can be carried out by be read in the data. "

FIG. 9 is an explanatory diagram for explaining the relationship between the position in the screen and the correction operation.

In the present embodiment, as shown in FIG. 9, the pixel 2a (the pixel 2a in the row to which the corrected image data is first supplied among the plurality of pixels 2a) exists in the uppermost row in the screen 2g. The correction data output from each of the LUT storage units 3G2a, 3R2a and 3B2a is supplied as corrected image data.

Further, as shown in FIG. 9, the LUT is stored in the pixel 2a existing in the lowermost row in the screen 2g (the pixel 2a in the row to which the corrected image data is supplied last among the plurality of pixels 2a). The correction data output from each of the units 3G2b, 3R2b, and 3B2b is supplied as corrected image data.

Also, as shown in FIG. 9, an interpolation calculation result obtained by interpolation according to the line is supplied to the line between the uppermost line and the lowermost line in the screen 2g.

The coefficient generation unit 3G2d, for example, sets the coefficient to be supplied to the multiplier 3G2e to “1” when the supply order is first, and to “0” when the supply order is last, and the supply order is slow. A coefficient that gradually decreases from “1” to “0” is used.

For example, the coefficient generation unit 3G2d supplies “0” when the supply order is the first, and “1” when the supply order is the last, as the coefficient supplied to the multiplier 3G2f. A coefficient that gradually increases from “0” to “1” is used.

The coefficient generation unit in the R color correction unit 3R2 and the coefficient generation unit in the B color correction unit 3B2 operate in the same manner as the coefficient generation unit 3G2d.

According to the present embodiment, when the supply order is different from the corresponding order, the interpolation calculation unit 3G2c generates a correction signal having a plurality of correction image data based on a plurality of correction data from the LUT storage units 3G2a and 3G2b. Created by interpolation and output.

Therefore, image data in any order can be corrected without having many LUT storage units. Therefore, the difference in gradation reproducibility and color reproducibility due to the position in the screen can be accurately reduced without increasing the circuit scale.

Also, since the LUT is applied to the pixel at the position in the screen where the supply timing difference is the largest, the largest difference in gradation reproducibility and color reproducibility due to the position in the screen can be reduced. Furthermore, since the interpolation calculation is used together, even with a small number of LUT storage units, it is possible to accurately reduce the difference in tone reproducibility and color reproducibility depending on the position in the screen.

Further, as the correction unit 3, a correction unit 32 shown in FIG. 10 may be used.

The difference between the correction unit 32 shown in FIG. 10 and the correction unit 31 shown in FIG. 8 is that the video signals input to the color correction units of the respective colors have three colors.

This makes it possible to refer to the G color video signal, the B color video signal corresponding to the color of the next field, and the R color video signal corresponding to the color of the previous field in order to correct the G color video signal. Thus, correction can be performed with higher accuracy.

[Third Embodiment]
In the third embodiment of the present invention, the G color correction unit 3G4 shown in FIG. 11 is used instead of the G color correction unit 3G2 shown in FIG.

The G color correction unit 3G4 has a one-to-one correspondence with the G color video signal.

The G color correction unit 3G4 includes a G color video signal, a B color video signal corresponding to the color of the next field of G color, and a timing signal (input frame synchronization timing signal, horizontal synchronization timing signal, and pixel clock timing signal). To output a G color correction signal.

The G color correction unit 3G4 includes three LUT storage units 3G4a, 3G4b, and 3G4c, two selection circuits 3G4e and 3G4f, a selection circuit control unit (SEL control unit) 3G4g, and an interpolation calculation unit 3G2c. The selection circuits 3G4e and 3G4f, the selection circuit control unit 3G4g, and the interpolation calculation unit 3G2c are included in the output unit 3G4h.

Each of the LUT storage units 3G4a, 3G4b and 3G4c can be referred to as color correction means or storage means.

The three LUT storage units 3G4a, 3G4b, and 3G4c all receive the G color video signal and the B color video signal and output the G color correction data.

Correspondence order is associated with each of the LUT storage units 3G4a, 3G4b, and 3G4c in advance. The correspondence order associated with each of the plurality of LUT storage units 3G4a, 3G4b, and 3G4c is different for each LUT storage unit.

In the present embodiment, the LUT storage unit 3G4a is associated with the first order in the order of supply. The LUT storage unit 3G4c is associated with the last order in the supply order. The LUT storage unit 3G4b is associated with a predetermined order between the first order in the order of supply and the last order in the order of supply.

Each time the LUT storage units 3G4a, 3G4b, and 3G4c receive image data and other image data, they output correction data obtained by correcting the image data based on the other image data and the corresponding order.

In this embodiment, each of the LUT storage units 3G4a, 3G4b, and 3G4c associates image data and other image data with correction data obtained by correcting the image data based on the other image data and the corresponding order. When the image data and other image data are received, correction data associated with the image data and other image data is output.

When the LUT storage units 3G4a, 3G4b and 3G4c accept the same image data and the same other image data, the correction data output from each of the LUT storage units 3G4a, 3G4b and 3G4c It is generally different from the correction data output from the storage unit.

When the difference between the common image data and the correction data output from each of the LUT storage units 3G4a, 3G4b, and 3G4c based on the common image data is used as the correction amount, in this embodiment, the LUT storage unit The correction amount in 3G4a is generally smaller than the correction amounts in LUT storage units 3G4b and 3G4c. In this embodiment, the correction amount in the LUT storage unit 3G4b is generally smaller than the correction amount in the LUT storage unit 3G4c.

The output unit 3G4h can be generally called output means.

The output unit 3G4h inputs the input frame synchronization timing signal, the horizontal synchronization timing signal, and the pixel clock timing signal, and specifies the supply order based on these timing signals.

The output unit 3G4h creates and outputs a correction signal having a plurality of corrected image data based on a plurality of correction data from each of the LUT storage units 3G4a, 3G4b, and 3G4c based on the order of supply.

The selection circuit 3G4e selects one of the correction data from each of the two LUT storage units 3G4a and 3G4b in accordance with the control from the selection circuit control unit 3G4g.

The selection circuit 3G4f selects one of the correction data from the two LUT storage units 3G4b and 3G4c in accordance with the control from the selection circuit control unit 3G4g.

Interpolation calculation unit 3G2c creates and outputs a correction signal having a plurality of correction image data based on a plurality of correction data from each of two selection circuits 3G4e and 3G4f based on the order of supply.

In this embodiment, when the order of supply is different from the order of correspondence associated with the LUT storage units 3G4a, 3G4b, or 3G4c, the interpolation computation unit 3G2c is based on a plurality of correction data from each of the selection circuits 3G4e and 3G4f. In addition, a correction signal having a plurality of corrected image data is generated and output by interpolation calculation.

The selection circuit control unit 3G4g specifies the order of correction data based on the input frame synchronization timing signal, the horizontal synchronization timing signal, and the pixel clock timing signal, and based on the order, the two selection circuits 3G4e and 3G4f is controlled.

FIG. 12 is an explanatory diagram for explaining the relationship between the position in the screen and the correction operation.

In the present embodiment, as shown in FIG. 12, the output unit so that the correction data output from the LUT storage unit 3G4a is supplied to the pixel 2a existing in the uppermost row in the screen 2g as corrected image data. 3G4h (specifically, the selection circuit control unit 3G4g, the selection circuits 3G4e and 3G4f, and the interpolation calculation unit 3G2c) operate.

Further, as shown in FIG. 12, the LUT storage unit 3G4b outputs to the pixels 2a existing in a predetermined row (hereinafter referred to as “predetermined row”) between the uppermost row and the lower area in the screen 2g. The output unit 3G4h operates so that the corrected data is supplied as corrected image data.

Also, as shown in FIG. 12, the output unit 3G4h so that the correction data output from the LUT storage unit 3G4c is supplied as corrected image data to the pixels 2a existing in the row belonging to the lower area in the screen 2g. Works.

Further, as shown in FIG. 12, a corrected image obtained by performing an interpolation operation on the pixel 2a in the row existing between the uppermost row in the screen 2g and the predetermined row according to the position of the row where the pixel 2a exists. The output unit 3G4h operates so that data is supplied. This interpolation calculation is in accordance with the interpolation calculation in FIG.

In addition, as shown in FIG. 12, corrected image data obtained by performing an interpolation operation on a pixel 2a in a row existing between a predetermined row and a lower area in the screen 2g according to the position of the row in which the pixel 2a exists. The output unit 3G4h operates so as to be supplied. This interpolation calculation is in accordance with the interpolation calculation in FIG.

Compared with the configuration shown in FIG. 8, since the LUT storage unit that outputs correction data suitable for the pixels 2a in a predetermined row is included, the difference in gradation reproducibility and color reproducibility due to the position in the screen is more effectively reduced. be able to.

[Fourth Embodiment]
In the fourth embodiment of the present invention, for example, the correction unit 33 shown in FIG. 13 is used as the correction unit 3 of the liquid crystal display device 1 shown in FIG.

In FIG. 13, the correction unit 33 can be generally referred to as correction means.

The correction unit 33 includes two time division multiplexing circuits (MUX) 33a and 33b, a multicolor correction unit 33c, and a demultiplexer 33d. The multicolor correcting unit 33c has the same configuration as the G color correcting unit 3G4 shown in FIG.

Time division multiplexing circuits (MUX) 33a and 33b are included in the switching unit 33e.

The switching unit 33e can be generally referred to as switching means.

When the switching unit 33e receives a plurality of video signals, the switching unit 33e outputs the image data and other image data to the plurality of LUT storage units 3G4a, 3G4b, and 3G4c in a time division manner while switching the video data for each video signal.

Each of the two time

division multiplexing circuits

33a and 33b receives an input frame synchronization timing signal, a horizontal synchronization timing signal, and a pixel clock timing signal, and based on these timing signals, an R color video signal (image Data), G color video signal (image data), and B color video signal (image data) are alternatively selected and output.

The selection switching rate at this time is three times the pixel clock timing signal, that is, the R color video signal, the G color video signal, and the B color video signal are time-division multiplexed at a speed three times the clock speed of those signals. .

The multicolor correction unit 33 has the same configuration as that of the G color correction unit 3G4 shown in FIG. 11, but operates at a rate three times that of the G color correction unit 3G4, and the R color correction signal (corrected image data), G A color correction signal (corrected image data) and a B color correction signal (corrected image data) are output in a time-sharing manner.

The demultiplexer 33d separates the time-division multiplexed color correction signals output from the multicolor correction unit 33c and outputs the R color correction signal, the G color correction signal, and the B color correction signal in parallel. .

FIG. 14 is an explanatory diagram for explaining the relationship between the position in the screen and the correction operation.

In the present embodiment, as shown in FIG. 14, the color correction unit so that the correction data output from the LUT storage unit 3G4a is supplied to the pixel 2a existing in the upper area in the screen 2g as the corrected image data. 33 operates.

Further, as shown in FIG. 14, the color correction unit 33 operates so that the correction data output from the LUT storage unit 3G4b is supplied to the pixels 2a existing in a predetermined row in the screen 2g as corrected image data. .

Further, as shown in FIG. 14, the color correction unit 33 operates so that the correction data output from the LUT storage unit 3G4c is supplied as the corrected image data to the pixel 2a existing in the lower area in the screen 2g. To do.

Further, as shown in FIG. 14, corrected image data obtained by performing an interpolation operation on the pixel 2a in the row existing between the upper area in the screen 2g and the predetermined row according to the position of the row in which the pixel 2a exists. So that the color correction unit 33 operates. This interpolation calculation is in accordance with the interpolation calculation in FIG.

Further, as shown in FIG. 14, corrected image data obtained by performing an interpolation operation on a pixel 2a in a row existing between a predetermined row and a lower area in the screen 2g according to the position of the row in which the pixel 2a exists. So that the color correction unit 33 operates. This interpolation calculation is in accordance with the interpolation calculation in FIG.

Note that the upper area, the predetermined row, and the lower area are changed according to the video signal of each color.

According to the present embodiment, when the switching unit 33e receives a plurality of video signals, the switching unit 33e switches between image data and other image data for each video signal, and in a time division manner, the plurality of LUT storage units 3G4a, 3G4b, and Output to 3G4c.

In this way, in order to correct the R, G, and B color video signals, the pixel to which the correction data from the LUT storage unit is applied is changed according to the color of the video signal while using the common LUT storage unit. Can be changed. Therefore, the difference in gradation reproducibility and color reproducibility depending on the position in the screen can be reduced with a small circuit scale.

[Other embodiments]
The number of LUTs may be changed depending on the color of the video signal. Since the light transmittance characteristic of the liquid crystal display element 2 varies depending on the wavelength of the light, a desired configuration can be obtained in consideration of the circuit scale and the correction accuracy.

The interpolation calculation may be linear interpolation or non-linear interpolation. When linear interpolation is used, the configuration of the interpolation calculation unit can be made smaller than when nonlinear interpolation is used. When nonlinear interpolation is used, the video signal can be corrected with higher accuracy than when linear interpolation is used.

The above embodiments can be applied to the liquid crystal display element 2 having a normally white configuration or a normally black configuration.

The above embodiments can be applied even if the color field is not the three colors of R, G, and B in the FSC system.

As mentioned above, although this invention was demonstrated with reference to each embodiment, this invention is not limited to the said embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

Claims

When a plurality of video signals corresponding to a plurality of colors and having a plurality of image data are received, a correction signal that outputs a plurality of corrected image data obtained by correcting each image data in the video signal is output for each video signal. Means,
Output control means for sequentially outputting a plurality of correction signals output from the correction means one by one;
Each time the correction signal is output from the output control means, an irradiation means for emitting light of a color corresponding to the video signal that is the source of the correction signal;
Each time it has a plurality of pixels and the correction signal is output from the output control means, each correction image data in the correction signal is sequentially changed to a pixel corresponding to the correction image data among the plurality of pixels. A liquid crystal display element that modulates and outputs light from the irradiation unit using a plurality of pixels to which the corrected image data is supplied,
The correcting means converts each image data in the video signal to the pixel corresponding to the corrected image data and the order of supplying the corrected image data obtained by correcting the image data in the liquid crystal display element. A liquid crystal display device that outputs a correction signal having a plurality of correction image data corrected based on other image data that is the source of other correction image data supplied immediately before or after.
The correction means includes
Each time the image data and the other image data are received, the image data is corrected based on the other image data and a corresponding order that is previously associated with itself in the order of supply. A plurality of color correction means for outputting data;
Based on a plurality of correction data from the plurality of color correction means, and based on the order of supply, an output means for creating and outputting a correction signal having the plurality of corrected image data, and
The liquid crystal display device according to claim 1, wherein the correspondence order associated with each of the plurality of color correction units differs for each color correction unit.
Each of the plurality of color correction means stores the image data, the other image data, and the correction data in association with each other, and receives the image data and the other image data. The liquid crystal display device according to claim 2, which is storage means for outputting.
The plurality of color correction units include a first color correction unit in which the correspondence order is the first order in the supply order, and a second color in which the correspondence order is the last order in the supply order. The liquid crystal display device according to claim 2, further comprising a correcting unit.
The plurality of color correction units include at least a third color correction unit in which the corresponding order is a predetermined order between the first order in the supply order and the last order in the supply order. The liquid crystal display device according to any one of claims 2 to 4, further comprising:
The output means generates a correction signal having the plurality of corrected image data by interpolation calculation based on the plurality of correction data from the plurality of color correction means when the supply order is different from the corresponding order. The liquid crystal display device according to any one of claims 2 to 5, wherein the liquid crystal display device outputs the output.
The liquid crystal display device according to any one of claims 2 to 6, wherein each of the plurality of color correction means and the output means are provided for each of the video signals.
The image processing apparatus further includes a switching unit that receives the plurality of video signals and outputs the image data and the other image data to the plurality of color correction units in a time division manner while switching the image data for each video signal. The liquid crystal display device according to any one of items 2 to 6.
Each time a correction signal having a plurality of pixels and having a plurality of correction image data is received, each correction image data in the correction signal is sequentially supplied to a pixel corresponding to the correction image data among the plurality of pixels. A drive circuit for a liquid crystal display element that modulates and outputs light of a color corresponding to a video signal that is a source of the correction signal, using a plurality of pixels to which the correction image data is supplied,
When a plurality of video signals corresponding to a plurality of colors and having a plurality of image data are received, a correction signal that outputs a plurality of corrected image data obtained by correcting each image data in the video signal is output for each video signal. Means,
Output control means for outputting a plurality of correction signals output from the correction means to the liquid crystal display element one by one in order,
The correcting means converts each image data in the video signal to the pixel corresponding to the corrected image data and the order of supplying the corrected image data obtained by correcting the image data in the liquid crystal display element. A driving circuit for a liquid crystal display element, which outputs a correction signal having a plurality of corrected image data corrected based on other image data that is the source of other corrected image data supplied immediately before or after.
The correction means includes
Each time the image data and the other image data are received, the image data is corrected based on the other image data and a corresponding order that is previously associated with itself in the order of supply. A plurality of color correction means for outputting data;
Based on a plurality of correction data from the plurality of color correction means, and based on the order of supply, an output means for creating and outputting a correction signal having the plurality of corrected image data, and
10. The drive circuit for a liquid crystal display element according to claim 9, wherein the correspondence order associated with each of the plurality of color correction units differs for each color correction unit.
A color image generation method performed by an FSC liquid crystal display device,
When receiving a plurality of video signals corresponding to a plurality of colors and having a plurality of image data, for each of the video signals, a correction signal having a plurality of corrected image data obtained by correcting each image data in the video signal is output,
The plurality of correction signals are output one by one in order,
Each time the correction signal is output one by one, it emits light of a color corresponding to the video signal that is the source of the correction signal,
Each time the correction signal is output from the output control unit one by one, each correction image data in the correction signal is sequentially supplied to a pixel corresponding to the correction image data among a plurality of pixels, and the correction is performed. Using a plurality of pixels supplied with image data, the light is modulated and output,
When outputting the correction signal having the plurality of corrected image data, each image data in the video signal is supplied to the plurality of pixels of the corrected image data obtained by correcting the image data and the correction. A correction signal having a plurality of corrected image data corrected based on other image data that is the source of other corrected image data supplied to the pixel corresponding to the image data immediately before or after the corrected image data. Output color image generation method.
When outputting a correction signal having the plurality of corrected image data,
Each time a plurality of color correction units accepts the image data and the other image data, the image data is assigned to the other image data and a corresponding order that is pre-associated with itself in the order of supply. , Output correction data corrected based on
Based on the plurality of correction data from the plurality of color correction means, based on the order of supply, create and output a correction signal having the plurality of corrected image data,
12. The color image generation method according to claim 11, wherein the correspondence order associated with each of the plurality of color correction units differs for each color correction unit.
Each time a correction signal having a plurality of pixels and having a plurality of correction image data is received, each correction image data in the correction signal is sequentially supplied to a pixel corresponding to the correction image data among the plurality of pixels. A method of driving a liquid crystal display element that modulates and outputs light of a color corresponding to a video signal that is a source of the correction signal using a plurality of pixels supplied with the correction image data,
When receiving a plurality of video signals corresponding to a plurality of colors and having a plurality of image data, for each of the video signals, a correction signal having a plurality of corrected image data obtained by correcting each image data in the video signal is output,
The plurality of correction signals are sequentially output to the liquid crystal display element one by one,
When outputting a correction signal having the plurality of corrected image data, each image data in the video signal is supplied to the liquid crystal display element in the order of supplying the corrected image data obtained by correcting the image data. A correction signal having a plurality of corrected image data corrected based on other image data that is the source of other corrected image data supplied to the pixel corresponding to the image data immediately before or after the corrected image data. A driving method of a liquid crystal display element for outputting.
When outputting a correction signal having the plurality of corrected image data,
Each time a plurality of color correction units accepts the image data and the other image data, the image data is assigned to the other image data and a corresponding order that is pre-associated with itself in the order of supply. , Output correction data corrected based on
Based on the plurality of correction data from the plurality of color correction means, based on the order of supply, create and output a correction signal having the plurality of corrected image data,
The liquid crystal display element driving method according to claim 13, wherein the correspondence order associated with each of the plurality of color correction units differs for each color correction unit.