JP2007226084A - Display device, color filter, liquid crystal display device provided with them, panel for liquid crystal display device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which improves color reproducibility and permits a high-luminance display screen, and to provide electronic equipment provided with the display device. <P>SOLUTION: In the display device, a unit pixel is constituted with a first subpixel of a first peak wavelength, a second subpixel of a second peak wavelength and a third subpixel of a third peak wavelength and, in one unit pixel of adjacent two unit pixels among a plurality of unit pixels, one or two of the first to third subpixels is formed by being substituted to at least one side of a fourth peak wavelength located between the first and the second peak wavelengths and a fifth peak wavelength located between the first and the third peak wavelengths with respect to the wavelength characteristic. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device and a color filter that suppresses a deviation in color tone of a display region, a liquid crystal display device including the same, a panel for a liquid crystal display device, and an electronic apparatus.

Conventionally, various display forms have been proposed for display devices. For example, a CRT (Cathode Ray Tube) display, an LCD (Liquid Crystal Display), an organic electroluminescence device (hereinafter referred to as an organic EL device), plasma. A display or the like is known. Each of such display devices has a configuration in which a sub-pixel of three colors of R (red), G (green), and B (blue) is provided in a unit pixel, and the amount of light of the three-color sub-pixel is determined. By making each different, various colors are realized and color images are displayed.
By the way, in the natural world, there is a wavelength region of a color that cannot be displayed only by using three colors of R, G, and B, and it is difficult to realize a color closer to natural light by using only three colors.
Therefore, in recent years, a display device that can realize a color closer to natural light than before has been proposed (see, for example, Patent Document 1). In this patent document, a pixel configuration further including three color subpixels of R, G, and B and C (cyan) is adopted. Since C is a color defined outside the triangular region formed by connecting the R, G, and B points on the chromaticity diagram, a display color in a wider wavelength range can be realized thereby. It has become. Further, in this document, in addition to C, an example in which Y (yellow color) and M (magenta color) are employed is described.

In the technique described in Patent Document 1, display colors in a wider wavelength range can be realized. However, although the color expression power is improved in the technique, the display quality is not necessarily improved. There was no problem.
That is, in a display device having four color sub-pixels in a unit pixel, when two sub-pixels having similar wavelength characteristics are arranged adjacent to each other, the two sub-pixels having different wavelength characteristics appear to be the same sub-pixel. There is a problem that the resolution of the display image is lowered as human visibility.
From such a background, a display device having a plurality of subpixels in a unit pixel, the first to third subwavelengths having first to third peak wavelengths in the wavelength characteristics of emitted light, respectively. A fourth peak wavelength which is located between the first peak wavelength and the second peak wavelength and is closer to the second peak wavelength than the first peak wavelength in the pixel and the wavelength characteristic; And the fourth subpixel is disposed adjacent to the first subpixel or the third subpixel, not adjacent to the second subpixel. A display device characterized by the above has been proposed. (See Patent Document 2)
JP 2001-306003 A JP-A-2005-309305

Examples of the planar arrangement of the sub-pixels in the color filter described in Patent Document 2 are shown in FIGS. 11 and 12. In Patent Document 2, as shown in FIG. A configuration in which the subpixels 101 to 104 are repeatedly arranged in the order of RGBC colors and a configuration in which the first to fourth subpixels 106 to 109 are repeatedly arranged in the order of BGRC as shown in FIG. 12 are disclosed. Has been.
The arrangement of colors in the color filters shown in FIGS. 11 and 12 has the advantage of eliminating the adverse effects caused by the color mixture of adjacent sub-pixels and preventing the degradation of resolution and image quality related to human visibility. On the other hand, since one unit pixel is divided into four subpixels, the unit pixel has the same size as compared with the configuration in which one pixel is divided into three subpixels. There has been a problem that the size of each sub-pixel is reduced.
For example, in a normal liquid crystal display device, the basic color filter has a pixel size of 240 μm × 240 μm, and when a pixel of this size is divided into three subpixels, each subpixel size is 80 μm × 240 μm. On the other hand, the size of each subpixel when divided into four subpixels is 60 μm × 240 μm, and the subpixel size is reduced accordingly. Although there is no problem in manufacturing a subpixel having a width of about 60 μm and a length of about 240 μm in the current manufacturing technology of a liquid crystal display device, when the liquid crystal display device has a high-definition specification such as a mobile phone, for example, a unit of 120 μm × 120 μm size If this pixel is divided into four pixels, it is a subpixel with a width of about 30 μm x a length of about 120 μm, and the manufacture of a subpixel with a width of 30 μm is difficult with the current manufacturing technology using a fine photolithography process. There is a problem that the manufacturing cost increases.

Further, in the color filter in the arrangement state shown in FIG. 11, since the human visibility is high in green, if red, green, blue, and cyan subpixels are arranged in the same area as they are, the entire display screen is whitened. In the case of display, the present inventor has found that there is a problem that a greenish white display occurs because all four colors are lit.
Therefore, the structure that limits the area of the green subpixel through which the light passes, limits the amount of green that reaches the viewer with a light shade of the subpixel, or the green subpixel as a light shade It was necessary to adopt.
However, if the light transmission area of a part of the sub-pixel is limited, there is a problem that the death area that does not contribute to display increases, the aperture ratio decreases, and the luminance decreases.

The present invention has been made in view of the above circumstances, and adopts a structure in which a basic unit pixel is divided into three subpixels, and relaxes the manufacturing conditions of the fine subpixels. Display devices that can improve the color reproducibility by mixing sub-pixels of the peak wavelengths of the pixels and eliminate the occurrence of a death area that does not contribute to display in the pixels, and increase the brightness of the display screen, and an electronic device equipped with the display device One purpose is to provide
In addition, the present invention employs a structure in which a basic unit pixel is divided into three sub-pixels, relaxes the manufacturing conditions of the fine sub-pixels, and then sub-pixels with the fourth peak wavelength or the fifth peak wavelength. A color filter that improves the color reproducibility and eliminates the occurrence of a death area that does not contribute to the display, thereby increasing the brightness of the display screen, and a liquid crystal display device including the color filter and a panel for the liquid crystal display device One object is to provide electronic equipment.

In order to achieve the above object, the present invention employs the following configuration.
A display device according to the present invention is a display device including a plurality of subpixels in a unit pixel, wherein a plurality of the unit pixels are aggregated to define a display region, and the first peak in the wavelength characteristic of emitted light The unit pixel is constituted by a first sub-pixel having a wavelength, a second sub-pixel having a second peak wavelength, and a third sub-pixel having a third peak wavelength, and defines the display area Among the plurality of unit pixels, one or two of the first to third sub-pixels in one unit pixel of adjacent two unit pixels has the first peak wavelength in the wavelength characteristic. And at least one of the fourth peak wavelength positioned between the second peak wavelength and the fifth peak wavelength positioned between the first peak wavelength and the third peak wavelength. The replaced sub-pixel of one unit pixel of the two adjacent unit pixels is a non-replaced sub-pixel in the other unit pixel, and has a peak wavelength of the replaced sub-pixel. It is characterized by not being adjacent to a subpixel having a close peak wavelength.

Among the first to third subpixels having the first to third peak wavelengths of the adjacent unit pixels, a part of the first to third subpixels of one unit pixel is set to the fourth or fifth peak. By substituting with sub-pixels of wavelengths, color reproducibility is improved by using sub-pixels of other colors in addition to sub-pixels of three colors, and the color tone of the entire display area is biased to a specific peak color This can be suppressed. In particular, green is a peak at a specific wavelength that is highly visible to the viewer, and is uniform so that the entire color tone of the display area does not deviate from the color of the green subpixel when all subpixels are used to display white. And good white display can be achieved.
Further, since the color of the display area can be made uniform so as not to be biased to the color of the subpixel of the specific color, the partial light blocking structure of the subpixel which has been performed in the conventional structure according to the color bias of the subpixel of the specific color Since the transmittance of transmitted light is improved by that amount, a bright display device with a high aperture ratio can be provided.
In addition, since the sub-pixel in which the color of one basic pixel has been replaced is arranged not to be adjacent to the sub-pixel having a close peak wavelength that is not replacing the color on the other basic pixel side, it has a close peak wavelength. Subpixels are not adjacent to each other, and resolution degradation due to adjacent subpixels having close peak wavelengths can be prevented.

  The display device of the present invention is a display device in which a plurality of unit pixels are provided in a unit pixel and a display region is defined by collecting the plurality of unit pixels, and the first wavelength characteristic of emitted light is the first. The unit pixel includes a first sub-pixel having a peak wavelength, a second sub-pixel having a second peak wavelength, and a third sub-pixel having a third peak wavelength, and the plurality of unit pixels 1 or 2 of the first to third sub-pixels in at least some of the unit pixels are located between the first peak wavelength and the second peak wavelength in the wavelength characteristic. At least one of the fourth peak wavelength and the fifth peak wavelength located between the first peak wavelength and the third peak wavelength, and the two adjacent single wavelengths. A replaced subpixel of one unit pixel of the pixels is a non-replaced subpixel in the other unit pixel, and has a peak wavelength close to a peak wavelength of the replaced subpixel. By not being adjacent to each other, a bias toward the first peak wavelength side or the third peak wavelength side is suppressed in the color tone of the entire display region.

In addition to the first to third sub-pixels having the first to third peak wavelengths, in addition to the sub-pixels of the fourth color by replacing some of them with the sub-pixels of the fourth or fifth peak wavelength, In addition to improving the color reproducibility using sub-pixels of other colors, it is possible to suppress the color tone of the entire display area from being biased to a specific peak color. In particular, green is a peak at a specific wavelength that is highly visible to the viewer, and is uniform so that the entire color tone of the display area does not deviate from the color of the green subpixel when all subpixels are used to display white. And good white display can be achieved.
Further, since the color of the display area can be made uniform so as not to be biased to the color of the subpixel of the specific color, the partial light blocking structure of the subpixel which has been performed in the conventional structure according to the color bias of the subpixel of the specific color Since the transmittance of transmitted light is improved by the amount that the death area is eliminated, a bright display device with a high aperture ratio can be provided.
In addition, since the sub-pixel in which the color of one basic pixel has been replaced is arranged not to be adjacent to the sub-pixel having a close peak wavelength that is not replacing the color on the other basic pixel side, it has a close peak wavelength. Subpixels are not adjacent to each other, and resolution degradation due to adjacent subpixels having close peak wavelengths can be prevented.

  In the display device of the present invention, one or two of the first to third sub-pixels in the other unit pixel of the two adjacent unit pixels among the plurality of unit pixels has the wavelength characteristic. A fourth peak wavelength located between the first peak wavelength and the second peak wavelength, and a fifth peak wavelength located between the second peak wavelength and the third peak wavelength. Are replaced with at least one of the two adjacent unit pixels, and the replaced subpixel of the other unit pixel is a non-replaced subpixel in the one unit pixel, The unit pixel is not adjacent to a subpixel having a peak wavelength close to the peak wavelength of the subpixel replaced.

  Among the adjacent basic pixels, in addition to a part of a plurality of subpixels of one unit pixel, a part of a plurality of subpixels of the other unit pixel is also replaced with the fourth subpixel or the fifth subpixel. A wider color reproducibility can be realized by effectively using the other two color sub-pixels in addition to the three color sub-pixels. In addition, since the sub-pixel replaced by one unit pixel and the sub-pixel replaced by the other unit pixel are not adjacent to the non-replaced sub-pixel of the peak wavelength, the sub-pixels having the close peak wavelength are The adjacent pixels are not adjacent to each other, and it is possible to prevent a decrease in resolution due to adjacent sub-pixels having close peak wavelengths.

In the display device of the present invention, the first subpixel having the first peak wavelength is green, the second subpixel having the second peak wavelength is blue, and the third subpixel having the third peak wavelength is used. The subpixel is red, and the subpixel having the fourth peak wavelength is cyan.
Regarding G (green) subpixels of adjacent unit pixels, B (blue) subpixels, and R (red) subpixels, G (green) subpixels of one unit pixel are subsidized to C (cyan) subpixels. By substituting with pixels, the total number of G (green) sub-pixels existing in the entire display area is reduced, and color reproduction of four-color sub-pixel display using C sub-pixels in addition to G, B, and R sub-pixels In addition, the color tone of the entire display area is prevented from being biased to the G (green) side.
In particular, green is a peak at a specific wavelength that is highly visible to the viewer, and is uniform so that the entire color tone of the display area does not deviate from the color of the green subpixel when all subpixels are used to display white. And good white display can be achieved.
Further, since the color of the display area can be made uniform so as not to be biased to the color of the green subpixel, the partial light blocking structure for the green subpixel, which has been performed in the conventional structure in accordance with the color bias of the green subpixel. Since the transmittance of transmitted light is improved by the amount that the death area is eliminated, a bright display device with a high aperture ratio can be provided.
Further, since the sub-pixel replaced with C is not adjacent to the G sub-pixel of another unit pixel, the G and C sub-pixels having close peak wavelengths are not adjacent to each other. It is possible to prevent a decrease in resolution due to the fact that the two are adjacent to each other.

In the display device of the present invention, the first subpixel having the first peak wavelength is green, the second subpixel having the second peak wavelength is blue, and the third subpixel having the third peak wavelength is used. The subpixel is red, and the subpixel having the fifth peak wavelength is magenta.
Of the adjacent unit pixel G (green) sub-pixel, B (blue) sub-pixel, and R (red) sub-pixel, the unit pixel R (red) sub-pixel is changed to M (magenta) sub-pixel. By substituting with pixels, the total number of R (red) sub-pixels existing in the entire display area is reduced, and color reproduction of four-color sub-pixel display with M sub-pixels added to G, B, and R sub-pixels In addition, the color tone of the entire display area is prevented from being biased to the R (red) side.

In the display device of the present invention, in the display area, subpixels of the same color are arranged in either the vertical direction or the horizontal direction, and a green subpixel, a blue subpixel, and a red subpixel are arranged in the other direction. , One of the sub-pixels is arranged in the first, second, and third, and is repeatedly arranged in the same order.
As the arrangement configuration of the sub-pixels, the green sub-pixel, the blue sub-pixel, and the red sub-pixel are repeatedly arranged in the same order by arranging any one of the sub-pixels in the first, second, and third. Can be adopted. For example, as an arrangement example of subpixels, any of GBRCBR repetition, RGBRCB repetition, RBGRBC repetition, BRGBRC repetition, and GRBCRB repetition may be selected.

  The color filter of the present invention is a display device that includes a plurality of subpixels in a unit pixel, the display region being defined by a plurality of unit pixels being aggregated, and a first peak in the wavelength characteristic of emitted light. The unit pixel is constituted by a first sub-pixel having a wavelength, a second sub-pixel having a second peak wavelength, and a third sub-pixel having a third peak wavelength, and defines the display area Among the plurality of unit pixels, one or two of the first to third sub-pixels in one unit pixel of adjacent two unit pixels has the first peak wavelength in the wavelength characteristic. And at least one of a fourth peak wavelength located between the second peak wavelength and a fifth peak wavelength located between the first peak wavelength and the third peak wavelength. The replaced subpixel of one unit pixel of the two adjacent unit pixels is a non-replaced subpixel in the other unit pixel, and the peak of the replaced subpixel It is not adjacent to a subpixel having a peak wavelength close to the wavelength.

  According to the filter of the present invention, one of the first to third subpixels of one unit pixel among the first to third subpixels having the first to third peak wavelengths of the adjacent unit pixels. By replacing the portion with the subpixel of the fourth or fifth peak wavelength, the color reproducibility is improved by using subpixels of other colors in addition to the subpixels of three colors, and the entire display area It is possible to suppress the color tone from being biased to a specific peak color. In particular, green is a peak at a specific wavelength that is highly visible to the viewer, and is uniform so that the entire color tone of the display area does not deviate from the color of the green subpixel when all subpixels are used to display white. And good white display can be achieved. In addition, since the sub-pixel in which the color of one basic pixel has been replaced is arranged not to be adjacent to the sub-pixel having a close peak wavelength that is not replacing the color on the other basic pixel side, it has a close peak wavelength. Subpixels are not adjacent to each other, and resolution degradation due to adjacent subpixels having close peak wavelengths can be prevented.

  The color filter of the present invention is a display device in which a plurality of unit pixels are provided in a unit pixel and a display region is defined by collecting the plurality of unit pixels, and the first color characteristic of emitted light is the first. The unit pixel includes a first sub-pixel having a peak wavelength, a second sub-pixel having a second peak wavelength, and a third sub-pixel having a third peak wavelength, and the plurality of unit pixels 1 or 2 of the first to third sub-pixels in at least some of the unit pixels are located between the first peak wavelength and the second peak wavelength in the wavelength characteristic. And at least one of the fourth peak wavelength and the fifth peak wavelength located between the first peak wavelength and the third peak wavelength, and the adjacent 2 Among the unit pixels, the replaced sub-pixel of one unit pixel is a non-replaced sub-pixel in the other unit pixel, and has a peak wavelength close to the peak wavelength of the replaced sub-pixel. By not being adjacent to the pixel, the bias toward the first peak wavelength side or the third peak wavelength side is suppressed in the color tone of the entire display region.

In the color filter of the present invention, the first sub-pixel having the first peak wavelength is green, the second sub-pixel having the second peak wavelength is blue, and the third sub-pixel having the third peak wavelength. The subpixel is red, the subpixel having the fourth peak wavelength is cyan, and the bias toward the green side is suppressed in the color tone of the entire display region.
Regarding G (green) subpixels, B (blue) subpixels, and R (red) subpixels of adjacent unit pixels, the G (green) subpixel of one unit pixel is changed to a C (cyan) subpixel. By substituting with pixels, the total number of G (green) sub-pixels existing in the entire display area is reduced, and color reproduction of four-color sub-pixel display using C sub-pixels in addition to G, B, and R sub-pixels In addition, the color tone of the entire display area is prevented from being biased to the G (green) side.
In particular, green is a peak at a specific wavelength that is highly visible to the viewer, and is uniform so that the entire color tone of the display area does not deviate from the color of the green subpixel when all subpixels are used to display white. And good white display can be achieved. Further, since the sub-pixel replaced with C is not adjacent to the G sub-pixel of another unit pixel, the G and C sub-pixels having close peak wavelengths are not adjacent to each other. It is possible to prevent a decrease in resolution due to the fact that the two are adjacent to each other.

A liquid crystal display device and a panel for a liquid crystal display device according to the present invention are characterized by including any of the color filters described above.
An electronic apparatus according to the present invention includes the display device or the color filter described above.
According to these liquid crystal display devices, liquid crystal display device panels, and electronic equipment, it is possible to provide the liquid crystal display devices, liquid crystal display device panels, and electronic equipment having the characteristics of the display device and the color filter.

Hereinafter, the present invention will be described based on the best embodiment, but the present invention is not limited to the following embodiment. Further, in all of the following drawings, each layer and each member are shown in different scales so that each layer and each member have a size that can be recognized on the drawings.
“First Embodiment”
The first embodiment of the present invention will be described below with reference to FIGS.
In the present embodiment, an example in which the present invention is applied to an active matrix transmission type liquid crystal display device using a thin film transistor (hereinafter abbreviated as TFT) as a switching element will be described.
FIG. 1 is a plan view of components of the liquid crystal display device according to the present embodiment as viewed from the counter substrate side, FIG. 2 is a perspective view for explaining a cross-sectional configuration of the liquid crystal display device, and FIG. FIG. 4 is a perspective view showing a state in which a color filter substrate and a TFT array substrate of a display device are opposed to each other, FIG. 4 is a plan view of color filters in a liquid crystal display device, and FIG. 5 is a diagram showing an example of wavelength selection characteristics of the color filter FIG. 6 is a diagram for explaining the xy chromaticity characteristics of the color filter of the liquid crystal display device.
As shown in FIGS. 1 to 3, in the liquid crystal display device (display device) S ₁ of this embodiment, a TFT array substrate 1 and a counter substrate 2 are bonded together by a sealing material 3 and partitioned by the sealing material 3. A liquid crystal layer 5 is enclosed in the region and is schematically configured. A light-shielding film (peripheral parting) 6 made of a light-shielding material is formed in an inner region of the sealing material 3 formation region. In the peripheral circuit area outside the sealing material 3, the data line driving circuit 7 and the external circuit mounting terminal 8 are formed along one side of the TFT array substrate 1, and along the other two sides adjacent to the one side. A scanning line driving circuit 9 is formed. On the remaining side of the TFT array substrate 1, a plurality of wirings 11 are provided for connecting between the scanning line driving circuits 9 provided on both sides of the display area. In addition, an inter-substrate conductive material 12 for appropriately establishing electrical continuity between the TFT array substrate 1 and the counter substrate 2 is appropriately disposed at the corner portion of the counter substrate 2.

As shown in FIGS. 2 and 3, a plurality of pixel electrodes 13 are arranged in a matrix on the inner side of the TFT array substrate 1, and a common electrode 15 is formed on the inner side of the counter substrate 2. Further, a color filter 16 is formed between the counter substrate 2 and the common electrode 15. Further, as shown in FIG. 2, a backlight unit 17 and upper and lower polarizing plates 18 and 19 are formed outside the TFT array substrate 1 and the counter substrate 2.
In the present embodiment, “inner side” means the side where the liquid crystal layer 5 is formed, and “outer side” means the side where the liquid crystal layer 5 is not disposed.

Here, the description will be given of respective components constituting the liquid crystal display device S _1.
The TFT array substrate 1 and the counter substrate 2 are made of a transparent substrate such as glass or plastic. Further, the pixel electrode 13 and the common electrode 15 are formed of a transparent conductor such as ITO (Indium Tin Oxide). Further, each pixel electrode 13 is connected to a TFT (Thin Film Transistor) 20 provided on the TFT array substrate 1, and each TFT 20 has a data wiring 20 </ b> A connected to the previous data line driving circuit 7, and a front end. The common electrode 15 and the pixel electrode are connected in accordance with the switching drive of the TFT 20 that is connected to the scan line drive circuit 9 and connected to the scan line drive circuit 9 and is controlled by the data line drive circuit 7 and the scan line drive circuit 9. A voltage is applied to the liquid crystal layer 5 between 13.
The liquid crystal layer 5 includes liquid crystal molecules whose arrangement changes according to the voltage value applied by the common electrode 15 and the pixel electrode 13. In this embodiment, a TN mode in which the TFT array substrate 1 and the counter substrate 2 are twisted by 90 degrees can be adopted as the liquid crystal mode, but another mode may be selected as the liquid crystal mode. In the case of the TN mode, the upper and lower polarizing plates 18 and 19 are arranged so that their transmission axes are orthogonal to each other in this embodiment.

In the liquid crystal layer 5 and the upper and lower polarizing plates 18 and 19 as described above, the liquid crystal layer 5 and the upper and lower polarizing plates 18 and 19 are changed by changing the arrangement of the liquid crystal molecules in accordance with the voltage value applied to the liquid crystal layer 5. The amount of transmitted light is changed. Accordingly, the liquid crystal layer 5 functions as a light transmission control unit of the present invention, and controls the amount of light incident from the backlight unit 17 side so that the viewer transmits it with a predetermined light transmission amount. Is.
The backlight unit 17 functions as an illumination unit of the present invention, and includes a light source and a light guide plate. In such a configuration, the light emitted from the light source is uniformly spread inside the light guide plate, and the light source light is emitted in the direction indicated by symbol A in FIG. 2 to reach the observer. The light source is made of, for example, a fluorescent tube or a white LED, and the light guide plate is transparent made of a resin such as acrylic.
The liquid crystal display device S ₁ having the above-described configuration is a transmissive liquid crystal display device that emits light emitted from the backlight unit 17 in the direction of A and takes out from the counter substrate 2 side as shown in FIG. Therefore, liquid crystal display is performed using the light source light of the backlight unit 17.

Next, the configuration of the color filter 16 of the present embodiment will be described.
FIG. 3 and FIG. 4 show an example of the color filter 16 in which one basic unit pixel is configured by three adjacent sub-pixels, and the unit pixels are arranged in a matrix, and a plurality of the unit pixels are arranged. In addition to the first to third subpixels 21, 22, and 23 of G (green), B (blue), and R (red), a part of the plurality of subpixels is replaced by a C instead of the G subpixel 21. A pixel configuration in which (cyan) sub-pixels 25 are arranged is shown. In this embodiment, the first subpixel 21 having the first peak wavelength is G, the second subpixel 22 having the second peak wavelength is B, and the third subpixel 23 has the third peak wavelength. Is R.
As shown in FIG. 3 or FIG. 4, the planar arrangement of the sub-pixels of the color filter 16 of this form is that the sub-pixels of each color are arranged by repeating G, B, R, C, B, R from the left side to the right side. It is set as the structure. In the planar arrangement of the sub-pixels, the sub-pixels of the same color are arranged in the vertical direction from top to bottom as shown in FIG. 3 or FIG. The color filter 16 having such a subpixel configuration is arranged so as to occupy most of the display area of the liquid crystal display device 1 shown in FIG.
That is, the color filter 16 of the present embodiment has a stripe in which the first to third subpixels 21, 22, and 23 are repeatedly arranged in the order of G, B, R, G, B, and R in the horizontal direction in plan view. In the case of the arrangement, among the unit pixels composed of G, B, and R that are adjacent to each other in a set, unit pixels 26 in an array in which G of one pixel is replaced with C, and G, B, The unit pixel 27 of the R arrangement is repeated, that is, the unit pixels 26 and 27 adjacently arranged in two sets are repeatedly arranged (G, B, R, C, B, R). Yes.

Each of the G, B, R, C, B, and R sub-pixels is irradiated with the white light of the backlight unit 17 so that a predetermined wavelength region included in the white light, in other words, a predetermined color, Is transmitted to the observer side. Therefore, each subpixel repeatedly arranged in the order of G, B, R, C, B, and R is each colored layer constituting the color filter 16, and is a wavelength selection element in the liquid crystal display device 1 of the present embodiment. It functions as.
In the present embodiment, in the display area, the sub-pixels are arranged as the same color in the vertical direction and G, B, R, C, B, R are repeated in the horizontal direction, but conversely in the vertical direction. Of course, the repeating arrangement of G, B, R, C, B, R may be a repeating arrangement of the same color in the horizontal direction.

FIG. 5 shows an example of wavelength selection characteristics of the color filter 16 of the present embodiment, and the peak wavelengths of B, C, G, and R are selected, for example, to be 450 nm, 510 nm, 550 nm, and 620 nm or more, respectively. Can do.
Specifically, as shown in the wavelength selection characteristics of FIG. 5, the difference between the peak wavelengths of B and C is 60 nm (510 nm-450 nm), and the difference between the peak wavelengths of G and C is 40 nm (550 nm-510 nm). Therefore, the C peak wavelength (fourth peak wavelength) is close to the G peak wavelength (first peak wavelength). Further, the peak wavelength of C is far from the peak wavelength of B (second peak wavelength).
Therefore, in this embodiment, by adopting a subpixel arrangement in which about half of the G subpixel (first subpixel) 21 is replaced with the C subpixel (fourth subpixel) 25, the G subpixel is adopted. By using the C sub-pixel 25 having a color close to 21, an increase in strong green color is suppressed. Therefore, as shown in FIG. 3 or FIG. 4, a pixel structure arranged in the order of G, B, R, C, B, R from the left is employed.

In the case of the color filter 16 composed of the repetitive arrangement of the unit pixels 26 and 27 of the above subpixel arrangement, about half of the first subpixel 21 (G) is replaced with C (cyan) in the total number of pixels. Therefore, since the color of G, which is more sensitive than R and B, is halved as human visual sensitivity and the rest is expressed in cyan, it is possible to suppress white from becoming green when all subpixels are fully lit. be able to.
In addition, if the sub-pixel arrangement of this embodiment is used, color display can be performed using C color in addition to G, B, and R of the first to third sub-pixels, so that color reproducibility is improved. The reason for this will be described below with reference to FIG.
The xy chromaticity characteristics of a liquid crystal display device having a pixel configuration including four color subpixels (4CF) and a liquid crystal display device having a pixel configuration including RGB three color subpixels (3CF) will be described and described. . With the pixel configuration of three color subpixels, it is possible to realize the color of a triangular region connecting the BGR points of the xy chromaticity characteristics, but with the pixel configuration of four color subpixels, the xy chromaticity characteristics shown in FIG. It is possible to realize the color of the rectangular area connecting the points of the GCBR. Therefore, the liquid crystal display device of this embodiment having a pixel configuration of four color subpixels can realize a wider color gamut than a pixel configuration of three color subpixels of RGB.

Further, in the present embodiment, the G subpixel 21 and the C subpixel 25 whose peak wavelengths are close to each other in wavelength selection characteristics are not adjacent to each other, and the C subpixel is adjacent to the B subpixel 22 or the R subpixel 23. The liquid crystal display device S ₁ that can prevent an apparent decrease in resolution and occurrence of streak-like lines, improve image display quality, and display an image with a wide color gamut is provided. Can be realized.

Here, a description will be given below in comparison with a configuration in which C and G subpixels are adjacent to each other. As shown in FIG. 5, since C and G have very close hues, when the two sub-pixels are adjacent to each other, the apparent resolution of the liquid crystal display device is lowered, and in the pixel configuration of the stripe arrangement, Striped lines may be visible. Such a decrease in resolution and image quality occurs when sub-pixels of four colors are arranged without considering human visibility.
On the other hand, in the liquid crystal display device S ₁ of the present embodiment, subpixels having peak wavelengths close to each other, that is, C and G subpixels 25 and 21 having substantially the same color are separated from each other, and other subpixels (B , R) 22 and 23 are arranged, it is possible to display an image with improved resolution and image quality as human visibility. Therefore, this embodiment can realize the liquid crystal display device S ₁ that can prevent such apparent resolution reduction and streak-like lines, improve image quality, and display an image with a wide color gamut. .
Further, in the liquid crystal display device S ₁ of this embodiment, the comprises a C sub-pixels 25 in addition to the sub-pixels of the GBR as described above, the arrangement of subpixels 25 of C is defined as above Therefore, it is possible to realize a very wide color reproduction range and display an image with display colors in a wide wavelength range closer to natural light, as well as improving the resolution and image quality of the image. Can do.

In the xy chromaticity characteristics shown in FIG. 6, the region on the left side or the upper left side of the line segment connecting the coordinates of B and G is the region on the upper right side of the line segment connecting the coordinates of G and R, or Since this area is larger than the area on the lower right side of the line segment connecting the coordinates of B, this area has a large room for expressing a color closer to natural light. Therefore, in the xy chromaticity diagram of FIG. 6, by providing a color coordinate subpixel located in a region on the left side or upper left side of the line segment connecting the coordinates of B and G, that is, a C subpixel in the unit pixel, The color reproduction range in the above-described region with a large room can be increased. Therefore, display colors in a wide wavelength range close to natural light can be realized.
Furthermore, the liquid crystal display device S ₁ including four-color sub-pixels 21, 22, 23, and 25 including C is compared with a liquid crystal display device including other color sub-pixels such as Y sub-pixels in a unit pixel. The displayable area in the xy chromaticity characteristics can be widened.

  In addition, the liquid crystal display device includes a backlight unit 17 that emits white light to each GBRC sub-pixel. Thus, the backlight unit 17 irradiates each GBRC subpixel with white light, each GBRC subpixel transmits light with the wavelength selection characteristics of each color of GBRC, and the liquid crystal layer 5 transmits the light. Since the amount of light is controlled, a very wide color reproduction range can be realized, and display colors in a wide wavelength range closer to natural light can be displayed with transmitted light. Further, since each GBRC dot is suitably arranged as described above, it is possible to display with improved resolution and image quality.

Next, in the case of the liquid crystal display device S ₁ having the above-described configuration, even if the pixel structure of four color subpixels is adopted, the unit pixel can be divided into three parts, so that, for example, the basic pixel size is 240 μm × Since it is 240 μm and the size when it is divided into three may be 80 μm × 240 μm, when actually manufacturing the color filter in the photolithography process, the burden on the process is the same as the conventional three-divided pixel structure, which is the same as the conventional one The photolithographic process can be used to display a pixel using four-color subpixels. Further, even when applied to a basic pixel structure of 120 μm × 120 μm size for high-definition display in a liquid crystal display device of a cellular phone, etc., a divided structure of 40 μm × 120 μm size may be used, and 30 μm in the case of four divisions. Compared to the case of × 120 μm size, the burden on the photolithography process is small. In the current photolithographic process for liquid crystal display devices, the current technology can handle up to about 40 μm in consideration of etching accuracy, mask accuracy, and exposure accuracy, but if the accuracy is improved to about 30 μm, the cost becomes extremely high. Therefore, the above-mentioned difference becomes a large process burden.

By the way, in the structure of the present embodiment, the basic arrangement is such that the subpixels 21, 22, and 23 of three colors are arranged in the order of G, B, and R, but the arrangement of the subpixels of three colors is R, G. , B are equivalent, so in the present invention, when G is repeatedly arranged in the order of R, G, B, R, G, B, a part of G is replaced with C and 2 unit pixels are regarded as 1 unit. It is the same as the repeated sequence of R, G, B, R, C, B to be handled, and when it is repeatedly arranged in the order of B, R, G, B, R, G, B, R, G, B, Of course, R and C repeat sequences are also equivalent. Further, for example, as an arrangement example of subpixels, any of repetition of GBRCBR, repetition of RBGRBC, repetition of GRBCRB, and the like may be selected.
The data line driving circuit 7 is applied to a liquid crystal display device S ₁ of this embodiment, although good in the same driving circuit and the common liquid crystal display device for scanning line drive circuit 9, in particular a liquid crystal display of this embodiment for the apparatus S ₁ may be a driver circuit which is specially designed.

“Embodiment of transflective liquid crystal display device”
FIG. 7 shows the color filter color arrangement and the pixel electrode arrangement when the color filter 16 according to the present invention is applied to a transflective liquid crystal display device when they are viewed in plan view. Is.
In the transflective liquid crystal display device, as shown in FIG. 7, a through-hole 31 is formed in a part of a pixel electrode 30 made of a reflective film provided to face each color filter. Turns off the light from the backlight and uses external light for reflection display, and in the case of transmissive display, the backlight is turned on, and the backlight light that passes through the previous through hole 31 is used for transmissive display. Can do.
As in this example, the color filter 29 having the same arrangement as that of the color filter 16 of the first embodiment can also be applied to a transflective liquid crystal display device.
Therefore, also in the color filter 29 of the transflective liquid crystal display device of this embodiment, about half of the G subpixel (first subpixel) 21 is replaced with the C subpixel (fourth subpixel) 25. A subpixel array can be employed. Therefore, as shown in FIG. 7, a pixel structure composed of sub-pixels repeatedly arranged in the order of C, B, R, G, B, and R from the left is employed.
Also in the liquid crystal display device provided with the color filter 29 of this example, the same effect as that of the liquid crystal display device provided with the color filter 16 can be obtained.

“Second Embodiment”
FIG. 8 is a perspective view showing a state in which the color filter substrate and the TFT array substrate of the liquid crystal display device of the second embodiment face each other.
Equivalent In this liquid crystal display device S ₂ of the second embodiment differs only arrangement of sub-pixels constituting the color filter 32 and the above liquid crystal display device S ₁ of the other configurations are the previous liquid crystal display device S ₁ of It is said that.
In the color filter 32 of this form, G, B, R, G, B, R in a configuration in which unit pixels composed of sub-pixels 21, 22, 23 of three colors are repeatedly arranged in the order of G, B, R. Of the two repetitive subpixels, one of the R (red) subpixels is replaced with the M (magenta) subpixel 35, and the subpixels are arranged in the order of G, B, R, G, B, and M. It is a structure in which pixels are repeatedly arranged.

In the structure of the second embodiment shown in FIG. 8, the structure of the first embodiment can suppress the color of R while the structure of the first embodiment suppresses the color of G.
With the subpixel arrangement of this embodiment, color display can be performed using the R color in addition to G, B, and R of the first to third subpixels, so the color reproducibility is improved. The reason for this will be described below with reference to FIG.
The xy chromaticity characteristics of a liquid crystal display device having a pixel configuration including four color subpixels B, G, R, and M and a liquid crystal display device having a pixel configuration including RGB three color subpixels are shown and described. To do. In the pixel configuration of three color subpixels, it is possible to realize the color of the triangular area connecting the GBR points of the xy chromaticity characteristics shown in FIG. 6, but in the pixel configuration of four color subpixels, it is shown in FIG. It is possible to realize a color of a rectangular area connecting GBMR points of xy chromaticity characteristics. Therefore, the liquid crystal display device of this embodiment having a pixel configuration of four color subpixels can realize a wider color gamut than a pixel configuration of three color subpixels of RGB.
Also, in the pixel configuration of four-color subpixels B, G, R, and M, considering the case where red near R is intensified by using M, a part of the R subpixels is replaced with M subpixels. Thus, it is possible to suppress the red color from becoming stronger by the repeated arrangement of R, G, B, M, G, and B that treats two unit pixels as one unit.
In this 2nd Embodiment, the other effect is the same as that of the structure of previous 1st Embodiment.

“Third Embodiment”
FIG. 9 is a perspective view showing a state in which the color filter substrate and the TFT array substrate of the liquid crystal display device of the third embodiment face each other.
Equivalent In this liquid crystal display device S ₃ of the third embodiment differs only arrangement of sub-pixels constituting the color filter 33 and the above liquid crystal display device S ₁ of the other configurations are the previous liquid crystal display device S ₁ of It is said that.
In the color filter 33 of this embodiment, G, B, R, G, B, G, B, R, G, B, R, G, B, R are arranged in the order of unit pixels composed of sub-pixels 21, 22, 23 in three colors. Of the two repeating subpixels of R, one of the G subpixels is replaced with a C (cyan) subpixel 25, and one of the R subpixels is replaced with an M (magenta) subpixel 35, The subpixels arranged in the order of G, B, R, C, B, and M are repeatedly arranged.

In the structure of the third embodiment shown in FIG. 9, the structure of the previous first embodiment suppresses the G color, whereas the G color is changed when five subpixels are used. A structure in which both colors of R are suppressed is adopted.
In the case of the subpixel arrangement of the present embodiment, in addition to the three colors G, B, and R of the first to third subpixels, the C color (cyan) of the fourth subpixel and the fifth subpixel. Since the five colors can be displayed using the M color (magenta) of the pixel, the color reproducibility is improved. The reason for this will be described below with reference to FIG.

The xy chromaticity characteristics of a liquid crystal display device having a pixel configuration consisting of five color subpixels G, B, R, C and M and a liquid crystal display device having a pixel configuration consisting of three color subpixels of GBR are shown. I will explain. In the pixel configuration of three color subpixels, it is possible to realize the color of the triangular region connecting the GBR points of the xy chromaticity characteristics shown in FIG. 6, but in the pixel configuration of five color subpixels, it is shown in FIG. It is possible to realize the color of the pentagonal region connecting the points of the GCBMR having the xy chromaticity characteristics. Therefore, the liquid crystal display device of the present embodiment in the pixel configuration of five color subpixels can realize a wider color gamut than the pixel configuration of three color subpixels of GBR.
Further, in the pixel configuration of five-color sub-pixels G, B, R, C, and M, considering the case where green near G is strong by using C and red near R is strong by using M, G R, G, B, M, C, B repetitive array treating 2 units of pixels as 1 unit by replacing some of the subpixels with C and replacing some of the R subpixels with M subpixels Therefore, it can be suppressed that green and red are strengthened.
In the third embodiment, other functions and effects are the same as those of the structure of the first embodiment.

“Fourth Embodiment”
FIG. 10 is a perspective view showing a state in which the color filter substrate and the TFT array substrate of the liquid crystal display device of the fourth embodiment face each other.
Equivalent In the third embodiment a liquid crystal display device S _4, the only difference arrangement of sub-pixels constituting the color filter 34 and the above liquid crystal display device S ₁ of the other configurations are the previous liquid crystal display device S ₁ of It is said that.
In the color filter 33 of this embodiment, G, B, R, G, B, G, B, R, G, B, R, G, B, R are arranged in the order of unit pixels composed of sub-pixels 21, 22, 23 in three colors. Of the two repetitive subpixels of R, among the first unit pixels G, B, and R, the G subpixel is replaced with a C (cyan) subpixel 25, and the next unit pixel G, B, Of R, R subpixels are replaced with M (magenta) subpixels 35, and as a result, subpixels arranged in the order of C, B, R, G, B, and M are repeatedly arranged. It is said that.

In the structure of the fourth embodiment shown in FIG. 10, the structure of the first embodiment suppresses the G color, whereas the G color is changed when five subpixels are used. A structure in which both colors of R are suppressed is adopted.
In the case of the subpixel arrangement of this embodiment, in addition to the three colors G, B, and R of the first to third subpixels, the fourth subpixel C (cyan) and the fifth subpixel Since five colors can be displayed using M (magenta), the color reproducibility is improved. The reason for this will be described below with reference to FIG.

The xy chromaticity characteristics of a liquid crystal display device having a pixel configuration consisting of five color subpixels G, B, R, C and M and a liquid crystal display device having a pixel configuration consisting of three color subpixels of GBR are shown. I will explain. In the pixel configuration of three color subpixels, it is possible to realize the color of the triangular region connecting the GBR points of the xy chromaticity characteristics shown in FIG. 6, but in the pixel configuration of five color subpixels, it is shown in FIG. It is possible to realize the color of the pentagonal region connecting the points of the GCBMR having the xy chromaticity characteristics. Therefore, the liquid crystal display device of the present embodiment in the pixel configuration of five color subpixels can realize a wider color gamut than the pixel configuration of three color subpixels of GBR.
Further, in the pixel configuration of five-color sub-pixels G, B, R, C, and M, considering the case where green near G is strong by using C and red near R is strong by using M, G By substituting part of the sub-pixels of C with C and substituting part of the R sub-pixels with M sub-pixels, it is possible to prevent green and red from becoming strong.
In the fourth embodiment, other functions and effects are the same as those of the structure of the first embodiment.

  In the third and fourth embodiments described above, the color filter having the pixel configuration including the five color subpixels G, B, R, C, and M has been described. However, the arrangement of the subpixels of the color filter is described. Is equivalent even if the arrangement of basic unit pixels of G, B, and R is replaced with the arrangement of R, G, and B, and assuming the arrangement of R, G, and B, R, G, B, In the case of the arrangement of R, G, B, in the case of the third embodiment, the arrangement of R, G, B, M, C, B is repeated, and the arrangement of R, G, B, R, G, B is repeated. In the case of the fourth embodiment, the arrangement is R, C, B, M, G, and B. Of course, these arrangements have the same effects as the present invention.

By the way, in each embodiment described so far, an example in which a part of the G subpixel is replaced with C or a part of the R subpixel is replaced with M has been described. May be replaced with Y (yellow) subpixels. In addition, the liquid crystal display device can be applied to a reflective liquid crystal display device, from a liquid crystal drive type to an STN (Super Twisted Nematic) type liquid crystal display device, or a TFD (Thin Film Diode) type liquid crystal. The present invention can be applied to any display device.
In addition, when a part of the G sub-pixel is replaced with C or a part of the R sub-pixel is replaced with M, an example in which one of the two adjacent pixels is replaced with G or R, That is, an example of replacing about 50% of the total pixels has been described, but the replacement ratio is not limited to 50%. The replacement ratio can be set to an arbitrary ratio with 50% as a guide. For example, since the green color of G is a color with high visibility for the observer, it is preferable to increase the replacement ratio. However, the ratio of passing through the G sub-pixel by partially incorporating a light blocking structure to the extent that the aperture ratio does not decrease. It is also possible to reduce the replacement ratio by reducing.

By the way, in this invention, the coloring area | region comprises 1 pixel with the coloring area | region of 4 colors.
The four colored regions used here are a blue colored region, a red colored region, and a blue to yellow color in the visible light region (380 to 780 nm) whose hue changes according to the wavelength. It consists of the coloring area | region of 2 types of hues selected in the hue of this. Although it is used here as a system, for example, if it is a blue system, it is not limited to a pure blue hue, but includes a bluish purple or a bluish green. If it is a red hue, it is not limited to red but includes orange. These colored regions may be composed of a single colored layer, or may be composed of a plurality of colored layers having different hues. In addition, although these colored regions are described in terms of hue, the hue can be set by changing the saturation and lightness as appropriate.
As a specific hue range, a colored region of a blue hue is from violet to blue-green, and more preferably from indigo to blue. The colored region of the red hue is orange to red. One colored region selected with a hue from blue to yellow is blue to green, more preferably blue-green to green. The other colored region selected with a hue from blue to yellow is from green to orange, more preferably from green to yellow. Or it is green to yellowish green.
Here, the same hue is not used for each colored region. For example, when a green hue is used in two colored regions selected from hues of blue to yellow, the other uses a blue or yellowish green hue for one green.
Thereby, a wider range of color reproducibility than the conventional RGB colored region can be realized.

In the above, a wide range of color reproducibility has been described in terms of hue, but in the following, it will be expressed in terms of wavelengths that pass through the colored region.
The blue colored region is a colored region having a wavelength peak of 415 to 500 nm, preferably a colored region of 435 to 485 nm. The red colored region is a colored region having a wavelength peak of 600 nm or more, and preferably a colored region having a wavelength peak of 605 nm or more. One colored region selected with a hue from blue to yellow is a colored region having a wavelength peak at 485-535 nm, preferably a colored region at 495-520 nm. The other colored region selected with a hue from blue to yellow is a colored region having a wavelength peak at 500-590 nm, preferably a colored region at 510-585 nm, or a colored region at 530-565 nm.

Next, it is expressed by an x, y chromaticity diagram.
The blue colored region is a colored region in which x ≦ 0.151 and y ≦ 0.056, and preferably colored in which 0.134 ≦ x ≦ 0.151 and 0.034 ≦ y ≦ 0.056. It is an area. The red coloring region is a coloring region satisfying 0.643 ≦ x and y ≦ 0.333, and preferably coloring satisfying 0.643 ≦ x ≦ 0.690 and 0.299 ≦ y ≦ 0.333. It is an area. One colored region selected with a hue from blue to yellow is a colored region in which x ≦ 0.164 and 0.453 ≦ y, and preferably 0.098 ≦ x ≦ 0.164 and 0.453. It is a colored region in ≦ y ≦ 0.759. The other colored region selected with a hue from blue to yellow is a colored region in 0.257 ≦ x, 0.606 ≦ y, and preferably 0.257 ≦ x ≦ 0.357, 0.606. It is a colored region in ≦ y ≦ 0.670.
These four colored areas can be applied within the above-described range when the sub-pixel includes a transmission area and a reflection area.

Moreover, you may use LED, a fluorescent tube, and organic EL as a light source of RGB as a backlight. Alternatively, a white light source may be used. The white light source may be a white light source generated by a blue light emitter and a YAG phosphor.
As the RGB light source, the following are preferable.
B has a wavelength peak at 435 nm to 485 nm. G has a wavelength peak at 520 nm to 545 nm. R has a wavelength peak at 610 nm-650 nm.
If the color filter (CF) is appropriately selected according to the wavelength of the RGB light source, a wider range of color reproducibility can be obtained.
In addition, a light source having a plurality of peaks, for example, having peaks at wavelengths of 450 nm and 565 nm may be used.

Examples of the configuration of the four colored regions include the following.
Colored areas with hues of red, blue, green, and cyan (blue green).
Colored areas with hues of red, blue, green, and yellow.
Colored areas with hues of red, blue, dark green, and yellow.
Colored areas of red, blue, emerald, and yellow.
Colored areas with hues of red, blue, dark green, and yellowish green.
Colored areas with hues of red, blue-green, dark green, and yellow-green.

[Electronics]
FIG. 13 is a perspective configuration diagram of a mobile phone which is an example of an electronic apparatus including the liquid crystal display device described above in a display unit. The mobile phone 1000 includes the above-described liquid crystal display device as a small-sized display unit 1001 and includes a plurality of operation buttons and the like, and is configured in a foldable type.
The liquid crystal display device 1001 provided in the mobile phone 1000 has the operational effects obtained by the configurations of the above-described embodiments.
By the way, the liquid crystal display device of the above embodiment is not limited to the mobile phone, but is an electronic book, a personal computer, a digital still camera, a liquid crystal television, a viewfinder type or a monitor direct view type video tape recorder, a car navigation device, a pager, It can be suitably used as an image display means for devices such as electronic notebooks, calculators, word processors, workstations, videophones, POS terminals, touch panels, etc. In any electronic device, high contrast, wide viewing angle transmission display And a reflective display can be obtained.

FIG. 1 is a plan view showing each component in the liquid crystal display device according to the first embodiment of the present invention. FIG. 2 is a perspective view showing a cross-sectional configuration of the liquid crystal display device according to the first embodiment of the present invention. FIG. 3 is a perspective view showing an example of a state in which the color filter substrate and the element substrate face each other in the liquid crystal display device according to the first embodiment of the present invention. FIG. 4 is a plan layout view of color filters in the liquid crystal display device according to the first embodiment of the present invention. FIG. 5 is a diagram illustrating an example of wavelength selection characteristics of each sub-pixel applied to the color filter. FIG. 6 is a diagram illustrating xy chromaticity characteristics of colors of sub-pixels applied to the color filter. FIG. 7 is a plan layout view of color filters in the liquid crystal display device according to the second embodiment of the present invention. FIG. 8 is a perspective view showing a state in which the color filter substrate and the element substrate are opposed to each other in the liquid crystal display device according to the third embodiment of the present invention. FIG. 9 is a perspective view showing a state in which the color filter substrate and the element substrate are opposed to each other in the liquid crystal display device according to the fourth embodiment of the present invention. FIG. 10 is a perspective view showing a state in which a color filter substrate and an element substrate are opposed to each other in a liquid crystal display device according to a fifth embodiment of the present invention. FIG. 11 is a front view showing a sub-pixel arrangement of a color filter applied to an example of a conventional liquid crystal display device. FIG. 12 is a front view showing another example of a sub-pixel arrangement of a color filter applied to a conventional liquid crystal display device. FIG. 13 is a perspective view showing a mobile phone as an example of an electronic apparatus provided with the liquid crystal display device.

Explanation of symbols

S ₁ , S ₂ , S ₃ , S ₄ liquid crystal display device (display device),
1 TFT array substrate,
2 counter substrate,
3 Sealing material,
5 Liquid crystal layer,
13 pixel electrodes,
16, 32, 33, 34 color filter,
17 Backlight unit,
21 first subpixel;
22 second subpixel,
23 third subpixel,
25 fourth subpixel,
26 unit pixels,
27 unit pixels,
35 fifth subpixel,

Claims (13)

A display device comprising a plurality of subpixels in a unit pixel, wherein a plurality of the unit pixels are aggregated to define a display area,
The unit pixel includes a first subpixel having a first peak wavelength, a second subpixel having a second peak wavelength, and a third subpixel having a third peak wavelength in the wavelength characteristic of emitted light. And one or two of the first to third sub-pixels in one of the two adjacent unit pixels among the plurality of unit pixels defining the display area are , In the wavelength characteristic, a fourth peak wavelength located between the first peak wavelength and the second peak wavelength, and a first peak wavelength located between the first peak wavelength and the third peak wavelength. 5 is replaced with at least one of the five peak wavelengths, and the replaced sub-pixel of one of the two adjacent unit pixels is not replaced in the other unit pixel. A sub-pixel, a display apparatus characterized by not being adjacent to the sub-pixel having a peak wavelength close to the peak wavelength of the substituted sub-pixels. A display device comprising a plurality of subpixels in a unit pixel, wherein a plurality of the unit pixels are aggregated to define a display area,
The unit pixel includes a first subpixel having a first peak wavelength, a second subpixel having a second peak wavelength, and a third subpixel having a third peak wavelength in the wavelength characteristic of emitted light. In the wavelength characteristics, one or two of the first to third sub-pixels in the at least some of the plurality of unit pixels has the first peak wavelength. And a fourth peak wavelength located between the second peak wavelength and a fifth peak wavelength located between the first peak wavelength and the third peak wavelength. , A replaced subpixel of one unit pixel of the two adjacent unit pixels is a non-replaced subpixel in the other unit pixel, and By not being adjacent to the sub-pixel having the peak wavelength close to the peak wavelength of the converted sub-pixel, the bias toward the first peak wavelength side or the third peak wavelength side is suppressed in the color tone of the entire display region. A display device characterized by being made.   Among the plurality of unit pixels, one or two of the first to third sub-pixels in the other unit pixel of the two adjacent unit pixels has the first peak in the wavelength characteristic. At least one of the fourth peak wavelength positioned between the wavelength and the second peak wavelength and the fifth peak wavelength positioned between the second peak wavelength and the third peak wavelength is substituted. In addition, a sub-pixel in which the other unit pixel of the two adjacent unit pixels is replaced is a sub-pixel that is not replaced in the one unit pixel and is replaced in the other unit pixel. The display device according to claim 1, wherein the display device is not adjacent to a subpixel having a peak wavelength close to a peak wavelength of the pixel.   The first sub-pixel having the first peak wavelength is green, the second sub-pixel having the second peak wavelength is blue, and the third sub-pixel having the third peak wavelength is red; The display device according to claim 1, wherein the sub-pixel having the fourth peak wavelength is a cyan color.   The first sub-pixel having the first peak wavelength is green, the second sub-pixel having the second peak wavelength is blue, and the third sub-pixel having the third peak wavelength is red; The display device according to claim 1, wherein the sub-pixel having the fifth peak wavelength is magenta.   In the display area, sub-pixels of the same color are arranged in either the vertical direction or the horizontal direction, and the green sub-pixel, the blue sub-pixel, and the red sub-pixel are in the other direction. 6. The display device according to claim 4, wherein the display device is arranged in the same order repeatedly arranged in the first, second and third. A display device comprising a plurality of subpixels in a unit pixel, wherein a plurality of the unit pixels are aggregated to define a display area,
The unit pixel includes a first subpixel having a first peak wavelength, a second subpixel having a second peak wavelength, and a third subpixel having a third peak wavelength in the wavelength characteristic of emitted light. And one or two of the first to third sub-pixels in one of the two adjacent unit pixels among the plurality of unit pixels defining the display area are , In the wavelength characteristic, a fourth peak wavelength located between the first peak wavelength and the second peak wavelength, and a first peak wavelength located between the first peak wavelength and the third peak wavelength. 5 is replaced with at least one of the five peak wavelengths, and the replaced sub-pixel of one of the two adjacent unit pixels is not replaced in the other unit pixel. A sub-pixel, a color filter, wherein the non-adjacent sub-pixels having a peak wavelength close to the peak wavelength of the substituted sub-pixels. A display device comprising a plurality of subpixels in a unit pixel, wherein a plurality of the unit pixels are aggregated to define a display area,
The unit pixel includes a first subpixel having a first peak wavelength, a second subpixel having a second peak wavelength, and a third subpixel having a third peak wavelength in the wavelength characteristic of emitted light. In the wavelength characteristics, one or two of the first to third sub-pixels in the at least some of the plurality of unit pixels has the first peak wavelength. And a fourth peak wavelength located between the second peak wavelength and a fifth peak wavelength located between the first peak wavelength and the third peak wavelength. , A replaced subpixel of one unit pixel of the two adjacent unit pixels is a non-replaced subpixel in the other unit pixel, and By not being adjacent to the sub-pixel having the peak wavelength close to the peak wavelength of the converted sub-pixel, the bias toward the first peak wavelength side or the third peak wavelength side is suppressed in the color tone of the entire display region. A color filter characterized by being made.   The first sub-pixel having the first peak wavelength is green, the second sub-pixel having the second peak wavelength is blue, and the third sub-pixel having the third peak wavelength is red; 10. The color filter according to claim 8, wherein the sub-pixel having the fourth peak wavelength is a cyan color, and the bias toward the green side is suppressed in the color tone of the entire display region.   A liquid crystal display device comprising the color filter according to claim 7.   A liquid crystal display panel comprising the color filter according to claim 7.   An electronic apparatus comprising the display device according to claim 1. An electronic apparatus comprising the color filter according to claim 7.

Images