JP2008064988A - Display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display panel which has proper horizontal resolution and can be improved in color reproducibility by expanding a color space area, and is proper in luminance. <P>SOLUTION: On the screen of the display panel, one pixel of a first scanning line comprises R, G, B, and G subpixels, and one pixel of a next line comprises R, G, B, and Ye subpixels, C subpixels, with the Ye subpixels being arrayed alternately in the vertical direction. Thus, the Ye subpixels and C subpixels are arrayed alternately at right angles to scanning lines, so that proper horizontal resolution is maintained, and color reproducibility is also made proper by expanding the color space area. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention has a display screen composed of a plurality of pixels, and various display devices such as a liquid crystal display device, a PDP (Plasma Display Panel), an organic / inorganic EL (Electroluminescent) display, and an SED (Surface-conduction Electron-emitter Display). The present invention relates to a display panel used in the above.

  One pixel of a conventional display panel is composed of three primary color sub-pixels composed of red (hereinafter referred to as R), green (hereinafter referred to as G), and blue (hereinafter referred to as B). Was displayed in color. In conventional display panels, it is difficult to provide natural coloring for subtle hues, and the color reproduction range is narrow, so the color reproduction range is widened by increasing the color purity of the three primary colors R, G, and B. However, in this case, there is a problem that the luminance is lowered due to the darker color.

  In view of this, an attempt has been made to expand the color reproduction range of liquid crystal display devices and the like by increasing the number of subpixels to increase the number of primary colors and increasing the number of colors to 4, 5, 6, and the like. However, these display panels can be advantageously designed in terms of color reproduction range and brightness, but as the color increases, the size of subpixels decreases, the number of source bus lines increases, and the aperture ratio increases significantly. There was a problem that it would drop. Accordingly, there is a need for a display panel that can suppress an increase in the number of source bus lines and a decrease in aperture ratio while realizing an expansion of the color space region.

Patent Document 1 discloses an invention of a display panel in which one pixel is composed of subpixels using primary colors of n colors (n represents an integer of 4 or more). In this display panel, subpixels are driven by transistors having a ratio of (n-1) per pixel.
JP 2006-64993 A

When one pixel is composed of four subpixels as in a conventional display panel, there is a problem that the color space region cannot be expanded sufficiently.
In Patent Document 1, specifically, one pixel includes five colors of sub-pixels, and the size of the sub-pixels is small, so that there is a problem that the horizontal resolution is deteriorated.
In addition, in a liquid crystal display device such as a liquid crystal television receiver, when one pixel does not include yellow (hereinafter referred to as Ye) and cyan (hereinafter referred to as C) subpixels, the color space region is narrow and the color It has been confirmed that the reproducibility is not good.

  The present invention has been made in view of such circumstances, and one pixel of one scan line is composed of R, G, B, and C sub-pixels, and one pixel of the next scan line is R, G, Constructed from B and Ye sub-pixels to provide a display panel with good horizontal resolution, wide color space, good color reproducibility, and good brightness The purpose is to do.

  In the present invention, the C subpixel is arranged between the B subpixel and the G subpixel on the scan line, and the Ye subpixel is arranged on the scan line with the G subpixel and the R subpixel. An object of the present invention is to provide a display panel in which colors are well mixed and reproduced by disposing them.

  In the present invention, one pixel area of one scanning line of the color filter unit is composed of sub-pixel areas using R, G, B, and C color filter layers, and one pixel area of the next scanning line is R, By configuring from the sub-pixel area using the color filter layers of G, B and Ye, the horizontal resolution is good and the color space area can be expanded to improve the color reproducibility. An object of the present invention is to provide a display panel with favorable luminance.

  Further, according to the present invention, the C sub-pixel region of the color filter unit is arranged between the B sub-pixel region and the G sub-pixel region on the scanning line, and the Ye sub-pixel region is arranged on the scanning line. An object of the present invention is to provide a display panel that is well-mixed and reproduces colors by being arranged between the sub-pixel region and the R sub-pixel.

  The display panel according to the present invention is a display panel in which an image is composed of pixels including sub-pixels using five different primary colors, and a scanning line having pixels composed of red, green, blue and cyan sub-pixels. And scanning lines having pixels composed of red, green, blue, and yellow sub-pixels are alternately arranged.

In the present invention, since one pixel is composed of four color sub-pixels, the horizontal resolution is better than when one pixel is composed of five or more color sub-pixels.
As described above, when the yellow and cyan subpixels are included in one pixel, the color space region is enlarged. In the present invention, however, the yellow subpixels and the cyan subpixels are alternately arranged on the scan line. Therefore, one pixel is composed of four sub-pixels to maintain a good horizontal resolution, and the color space region can be expanded to improve the color reproducibility.
Also, since yellow or cyan with high luminance is included, the overall luminance is improved, the saturation of red, green and blue is improved, the color is sharpened, and the depth and contrast are increased.

  In the display panel according to the present invention, subpixels adjacent to the cyan subpixel on the scan line are blue and green subpixels, and subpixels adjacent to the yellow subpixel on the scan line are green and red. It is characterized by being a sub-pixel.

In the CIE color system, which is a graph showing a color space area, the cyan area is between the blue area and the green area, and the yellow area is between the red area and the green area.
In the present invention, the cyan subpixel is between the blue subpixel and the green subpixel, and the yellow subpixel is between the red subpixel and the blue subpixel, so that the color mixing is good. The color is reproduced finely.

  The display panel according to the present invention uses a color filter layer of red, green, blue, and cyan in a display panel including a color filter unit having a pixel region including a sub-pixel region using five different color filter layers. A scan line having a pixel area composed of sub-pixel areas and a scan line having a pixel area composed of sub-pixel areas using red, green, blue and yellow color filter layers are alternately arranged. It is characterized by being.

In the present invention, since one pixel area is composed of four-color subpixel areas, the horizontal resolution is better than when one pixel area is composed of five or more subpixel areas. .
In the present invention, since the yellow sub-pixel region and the cyan sub-pixel region are alternately arranged on the scanning line, one pixel region is composed of four-color sub-pixel regions to maintain a good horizontal resolution. The color space region can be expanded to improve the color reproducibility.
Also, since yellow or cyan with high luminance is included, the overall luminance is improved, the saturation of red, green and blue is improved, the color is sharpened, and the depth and contrast are increased.

  In the display panel according to the present invention, the subpixel region adjacent to the subpixel region using the cyan color filter layer on the scanning line is a subpixel region using the blue and green color filter layers, and the yellow color The subpixel region adjacent to the subpixel region using the filter layer on the scan line is a subpixel region using the green and red color filter layers.

  In the present invention, the cyan subpixel region is between the blue subpixel region and the green subpixel region, and the yellow subpixel region is between the red subpixel region and the blue subpixel region. Therefore, the colors are mixed well and the colors are reproduced finely.

According to the present invention, one pixel of one scan line is composed of R, G, B, and C subpixels, and one pixel of the next scan line is composed of R, G, B, and Ye subpixels. Therefore, the resolution in the horizontal direction is good, and the color space region can be expanded to improve the color reproducibility. Also, the luminance is good, the saturation of R, G and B is good, the color is sharp, the depth and contrast are increased.
Therefore, in a display device such as a high-definition television receiver using this display panel, the color space area can be expanded with a good video resolution, and a high-quality image can be provided.

According to the present invention, the C sub-pixel is disposed between the B sub-pixel and the G sub-pixel on the scan line, and the Ye sub-pixel is disposed on the scan line. Since it is arranged between the pixels, the colors are mixed well and the colors are reproduced finely.
Therefore, a display device such as a high-definition television receiver using this display panel can provide a higher quality image.

According to the present invention, one pixel area of one scanning line of the color filter unit is composed of sub-pixel areas using R, G, B, and C color filter layers, and one pixel area of the next scanning line is formed. Since it is composed of sub-pixel areas using R, G, B, and Ye color filter layers, the horizontal resolution is good and the color space area is enlarged to improve color reproducibility. I can do it. Also, the luminance is good, the saturation of R, G and B is good, the color is sharp, the depth and contrast are increased.
Therefore, in a display device such as a high-definition television receiver using this display panel, the color space area can be expanded with a good video resolution, and a high-quality image can be provided.

Further, according to the present invention, the C sub-pixel region of the color filter unit is arranged between the B sub-pixel region and the G sub-pixel region on the scanning line, and the Ye sub-pixel region on the scanning line. Since it is arranged between the G sub-pixel region and the R sub-pixel, the colors are mixed well and the color is reproduced finely.
Therefore, a display device such as a high-definition television receiver using this display panel can provide a higher quality image.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing a part of a screen in which pixels of a display panel according to Embodiment 1 of the present invention are arranged in a planar shape.
In this screen, one pixel in the first line of the scan line is composed of R, G, B, and C sub-pixels, and one pixel in the next line is composed of R, G, B, and Ye sub-pixels. , C sub-pixels and Ye sub-pixels are alternately arranged in the vertical direction.
In FIG. 1, the case where the color arrangement of R, G, B, C, and Ye is a stripe arrangement has been described, but the present invention is not limited to this, and may be a mosaic arrangement.

In this embodiment, since one pixel is composed of sub-pixels of four colors, the horizontal resolution is better than when one pixel is composed of sub-pixels of five or more colors.
In the present embodiment, the Ye sub-pixel and the C sub-pixel are alternately arranged on the scan line, so that a good horizontal resolution can be maintained and the color space region can be expanded to achieve color reproducibility. Can be improved.
In addition, since Ye or C having a high luminance is included, the overall luminance is improved, the saturation of R, G, and B is improved, the color is sharpened, and the depth and contrast are increased.
Therefore, in a display device such as a high-definition television receiver using this display panel, the color space region can be expanded with a good video resolution, and a high-quality image can be obtained.

Embodiment 2. FIG.
FIG. 2 is a schematic diagram showing a part of a screen in which pixels of a display panel according to Embodiment 2 of the present invention are arranged in a planar shape.
In this screen, as in the first embodiment, one pixel in the first line of the scanning line is composed of G, R, B, and C sub-pixels, and one pixel in the next line is R, B, G, and Ye. The C sub-pixels and Ye sub-pixels are alternately arranged in the vertical direction.
In this embodiment, the subpixels adjacent to the C subpixel on the scanning line are the B and G subpixels, and the subpixel adjacent to the Ye subpixel on the scanning line is the G and the subpixels. It is configured to be R sub-pixels.

In this embodiment, the C sub-pixel is between the B sub-pixel and the G sub-pixel, and the Ye sub-pixel is between the R sub-pixel and the G sub-pixel. The colors are mixed and reproduced in detail.
Therefore, in a display device such as a high-definition television receiver using this display panel, a higher quality image can be obtained.

Embodiment 3 FIG.
FIG. 3 is a block diagram showing a configuration of a liquid crystal display device 1 including a display panel according to Embodiment 3 of the present invention.

  The liquid crystal display device 1 is connected to or provided with a device that outputs image data such as a PC, a camera, and a TV tuner, for example, and includes a data input unit 2, a data conversion unit 3, a drive waveform generation unit 4, and a signal An output control unit 5, a gate driving unit 6 (gate driver), a source driving unit 7 (source driver), a liquid crystal display panel 8, and a backlight 9 (see FIG. 5) are provided.

  The data input unit 2 is a circuit that converts an image signal input from a device that outputs image data into a digital signal corresponding to the resolution of the liquid crystal display panel 8, and outputs the converted digital signal to the data conversion unit 3. To do.

  The data conversion unit 3 is a circuit that converts an input digital signal so as to be adapted to the sub-pixels of the liquid crystal display panel 8, and R, G, B, C, Ye image data signals obtained by the conversion. Is output to the signal output control unit 5.

The drive waveform generation unit 4 is synchronized with the vertical synchronization signal, the horizontal synchronization signal, and the horizontal synchronization signal for driving the gate drive unit 6 and the source drive unit 7 based on the image signal input from the data input unit 2. A pulse signal for alternately outputting C and Ye image data signals for each gate bus line (scanning line) is generated, and the signal is output to the gate driving unit 6 and the signal output control unit 5.
The vertical synchronization signal is a pulse signal output every frame period, and the horizontal synchronization signal is a pulse signal output every line scanning period.

FIG. 4 shows a vertical synchronization signal, a horizontal synchronization signal, and a pulse signal for alternately outputting C and Ye image data signals for each gate bus line in synchronization with the horizontal synchronization signal and the horizontal synchronization signal generated by the drive waveform generation unit 4. (A) is a vertical synchronizing signal, (b) is a horizontal synchronizing signal, and (c) is a waveform diagram showing the pulse signal. In the figure, V is a frame period, and H is a line scanning period.
As will be described later, the liquid crystal display panel 8 includes a gate bus line having pixels composed of R, G, B, and C subpixels, and a pixel composed of R, G, B, and Ye subpixels. Since the gate bus lines are arranged alternately, in the pulse signal, the C image data signal is output in the first cycle of the line scanning cycle, and the Ye image data signal is output in the second cycle. It is configured as follows.

  The gate driving unit 6 is a circuit that generates a signal for opening and closing a TFT (Thin Film Transistor), which will be described later, of the liquid crystal display panel 8, and sequentially applies a voltage to each gate bus line of the liquid crystal display panel 8.

  The source driver 7 is a circuit that generates a signal voltage to be applied to each sub-pixel of the liquid crystal display panel 8 based on the image data signal, and the signal voltage is applied to each source bus line (signal line) of the liquid crystal display panel 8. Apply.

  Based on the pulse signal generated by the drive waveform generation unit 4, the signal output control unit 5 outputs one of the input R, G, and B image data signals and the C and Ye image data signals. The data signal is synchronized with the horizontal synchronization signal and output to the source driver 7 for each gate bus line.

FIG. 5 is a block diagram showing a schematic configuration of the liquid crystal display panel 8.
A TFT 82 and a pixel electrode 83 are formed on one surface of the TFT substrate 81 of the liquid crystal display panel 8 for each subpixel region. A liquid crystal layer 84 is formed so as to cover the TFT 82 and the pixel electrode 83, and liquid crystal molecules are enclosed. The TFT 82 is composed of a field effect transistor (FET) or the like, and has a gate electrode connected to the gate bus line and a source electrode connected to the pixel electrode 83.

  A color filter portion 87 is formed on one surface of the color filter substrate 86, and the color filter substrate 86 is disposed with the color filter portion 87 facing the liquid crystal layer 84. A counter electrode 85 is formed so as to cover the surface of the color filter portion 87 on the TFT substrate 81 side.

FIG. 6 is a plan view showing a part of the color filter portion 87.
The color filter unit 87 includes five subpixel regions corresponding to five colors R, G, B, C, and Ye formed on the color filter substrate 86, and a black matrix 876 that isolates each subpixel. .
An R color filter layer 871, a G color filter layer 872, a B color filter layer 873, and a C color filter layer 874 are formed in the sub-pixel region of the first line of the gate bus line, respectively. An R color filter layer 871, a G color filter layer 872, a B color filter layer 873, and a Ye color filter layer 875 are respectively formed in the sub-pixel region of the line, and a C color filter layer 874 is formed. And yellow color filter layers 875 are alternately arranged in the vertical direction.
A set of TFTs 82, a pixel electrode 83, a color filter layer, a counter electrode 85, and a liquid crystal display 84 sandwiched therebetween constitute a subpixel.

In FIG. 5, deflection plates 88 and 89 are formed on the outer surfaces of the color filter substrate 86 and the TFT substrate 81, respectively. A backlight 9 is disposed outside the deflection plate 89.
The backlight 9 is a light source, and an image is displayed on the liquid crystal display panel 8 by changing the transmission amount of light emitted from the backlight 9.

FIG. 7 is a schematic diagram showing a part of the drive circuit of the liquid crystal display panel 8.
As described above, the pixel of the first gate bus line HL1 is composed of R, G, B, and C sub-pixels, and the pixel of the next line of the gate bus line HL2 is sub-pixels of R, G, B, and Ye. It consists of pixels, and C and Ye sub-pixels are arranged alternately in the vertical direction.

  The gate driver 6 sequentially applies a voltage to each of the gate bus lines HL1, HL2, HL3, HL4,. When a voltage is applied to the gate bus line, the TFT 82 (not shown) whose gate is connected to the gate bus line is turned on.

As described above, the source drive unit 7 receives from the signal output control unit 5 the R, G, and B image data signals on the gate bus lines HL1, HL2, HL3, HL4,. An image data signal of C or Ye is input, and the source driver 7 corresponds to each of the gate bus lines HL1, HL2, HL3, HL4,..., R, G and B source bus lines, and C or A signal voltage based on the image data signal is applied to the Ye source bus line.
When the TFT 82 is turned on, the signal voltages of the R, G and B source bus lines and the C or Ye source bus lines applied by the source driver 7 are supplied to the pixel electrode 83 (FIG. (Not shown) is charged, and the arrangement of liquid crystal molecules in the liquid crystal layer 84 (not shown) is changed by the voltage between the pixel electrode 83 and the counter electrode 85 (not shown), and is incident from the backlight 9. Display is performed by changing the amount of transmitted light.

In the liquid crystal display device 1 of the present embodiment configured as described above, one pixel is composed of four sub-pixels, and R, G, B, C, and Ye obtained based on the input image signal. Among the image data signals, the C and Ye image data signals are alternately output for each gate bus line in accordance with the arrangement of the sub-pixels of the liquid crystal display panel 8, so that one pixel is 5 Compared with the case of sub-pixels of color or higher, the horizontal resolution is better, and since one pixel contains C or Ye sub-pixels, the color space area is expanded and color reproducibility is good. Can be made.
In addition, since C or Ye having high luminance is included, the overall luminance is improved, the saturation of R, G, and B is improved, the color is sharpened, and the depth and contrast are increased.
Therefore, when this liquid crystal display device 1 is applied to a liquid crystal display device such as a high-definition television receiver, a high-quality image can be obtained.

  In the above-described embodiment, the case where image data signals of R, G, B, C, and Ye are obtained by the data converter 3 has been described. However, the present invention is not limited to this. R, G, and B image data signals may be obtained, and C and Ye image data signals may be generated based on the image data signals.

FIG. 8 is a plan view showing a part of the color filter portion 97 of the display panel according to Embodiment 4 of the present invention.
The liquid crystal display device according to the fourth embodiment is different from the liquid crystal display device 1 according to the third embodiment only in the color filter unit 97.
The color filter unit 97 includes five subpixel regions corresponding to five colors R, G, B, C, and Ye formed on a color filter substrate (not shown), and black that separates each subpixel region. And a matrix 976. A G color filter layer 971, an R color filter layer 972, a B color filter layer 973, and a C color filter layer 974 are formed in each sub-pixel region of the first line of the scanning line, respectively. In each sub-pixel region of the line, an R color filter layer 972, a B color filter layer 973, a G color filter layer 971, and a Ye color filter layer 975 are formed, respectively, and the C color filter layer 974 and Y color filter layers 975 are alternately arranged in the vertical direction.

  In the present embodiment, the color filter layers adjacent to the C color filter layer 974 on the scanning line are the B color filter layer 973 and the G color filter layer 971, and the Ye color filter layer 975 has the scanning line. The adjacent color filter layers are a G color filter layer 971 and an R color filter layer 972.

In this embodiment mode, the C color filter layer 974 is between the B color filter layer 973 and the G color filter layer 971, and the Ye color filter layer 975 is the R color filter layer 972 and the B color filter layer 971. Since it is between the filter layer 973, the colors are mixed well and the colors are reproduced finely.
Therefore, in a display device such as a high-definition television receiver using this display panel, a higher quality image can be obtained.

  In the third and fourth embodiments, the case where the display panel of the present invention is applied to a liquid crystal display device having a backlight is described. However, the present invention is not limited to this, and a self-luminous liquid crystal display device. You may apply to. The display device is not limited to a liquid crystal display device, and can be applied to a display device such as a PDP, an organic / inorganic EL display, or an SED. In this case, the color filter portion is not necessary.

It is a schematic diagram which shows a part of screen which has arranged the pixel of the display panel which concerns on Embodiment 1 of this invention in planar shape. It is a schematic diagram which shows a part of screen which has arranged the pixel of the display panel which concerns on Embodiment 2 of this invention in planar shape. It is a block diagram which shows the structure of a liquid crystal display device provided with the display panel which concerns on Embodiment 3 of this invention. FIG. 6 is a waveform diagram showing a pulse signal for alternately outputting C and Ye image data signals for each gate bus line in synchronization with a vertical synchronization signal, a horizontal synchronization signal, and a horizontal synchronization signal generated by a drive waveform generation unit; is there. It is a block diagram which shows schematic structure of a liquid crystal display panel. It is a top view which shows a part of color filter part. It is a schematic diagram which shows a part of drive circuit of a liquid crystal display panel. It is a top view which shows a part of color filter of the display panel which concerns on Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Data input part 3 Data conversion part 4 Drive waveform generation part 5 Signal output control part 6 Gate drive part 7 Source drive part 8 Liquid crystal display panel 81 TFT substrate 82 TFT
83 Pixel electrode 84 Liquid crystal layer 85 Counter electrode 86 Color filter substrate 87, 97 Color filter portion 871, 872, 873, 874, 875, 971, 972, 973, 974, 975 Color filter layer 876, 976 Black matrix 88, 89 Polarization Board 9 Backlight

Claims (4)

In a display panel in which an image is composed of pixels including sub-pixels using five different primary colors,
Scan lines having pixels composed of red, green, blue and cyan sub-pixels and scan lines having pixels composed of red, green, blue and yellow sub-pixels are alternately arranged. A display panel characterized by The subpixels adjacent to the cyan subpixel on the scan line are the blue and green subpixels,
The display panel according to claim 1, wherein the subpixels adjacent to the yellow subpixel on the scanning line are green and red subpixels. In a display panel including a color filter unit having a pixel region including a sub-pixel region using different color filter layers of five colors,
A scan line having a pixel area composed of sub-pixel areas using red, green, blue, and cyan color filter layers, and a sub-pixel area using red, green, blue, and yellow color filter layers. A display panel, wherein scanning lines having pixel areas are alternately arranged. The sub-pixel region adjacent to the sub-pixel region using the cyan color filter layer on the scanning line is the sub-pixel region using the blue and green color filter layers,
4. The display panel according to claim 3, wherein the sub-pixel region adjacent to the sub-pixel region using the yellow color filter layer on the scanning line is a sub-pixel region using green and red color filter layers.

Images