JP2020112659A - Liquid crystal display device - Google Patents

Abstract

To provide a liquid crystal display device that excels in display quality.SOLUTION: The liquid crystal display device comprises a liquid crystal display panel and an illumination device. Each individual pixel PX of the liquid crystal display panel has a first sub-pixel of first color having a first opening region A1, a second sub-pixel of second color having a second opening region A2 and a third sub-pixel of third color having a third opening region A3. The illumination device includes a light guide body having a first side edge GS1 and a first light source LU1 arranged facing the first side edge GS1. At least one of the first, second and third opening regions A1, A2, A3 has a square measure that differs in accordance with proximity to the first light source LU1.SELECTED DRAWING: Figure 7

Description

Embodiments of the present invention relate to a liquid crystal display device.

A liquid crystal display device is known as a display device. For example, a liquid crystal display device includes a liquid crystal display panel and an illumination device that illuminates the liquid crystal display panel. The lighting device has a light guide and a light source. A wavelength dispersion characteristic is known as a property of the light guide. The chromatic dispersion characteristic is a characteristic that the transmittance of light (wavelength) varies depending on the wavelength range. It is known that the wavelength dispersion characteristic is shown in the visible light wavelength range, for example.

Even if a light source that emits white light toward one side edge of the light guide is used, it is difficult for the illumination device to illuminate the entire area of the liquid crystal display panel with white light having the same chromaticity. This is because the chromaticity of the light emitted from the lighting device changes from white light as the optical path length through the light guide increases.

International Publication No. 2010/061872

The present embodiment provides a liquid crystal display device having excellent display quality.

The liquid crystal display device according to one embodiment,
A liquid crystal display panel comprising a plurality of pixels arranged in a display region, wherein each pixel has a first sub-pixel of a first color having a first opening region and a second sub-pixel having a second opening region. A second sub-pixel and a third sub-pixel of a third color having a third opening region, and a light guide body having a first side edge and facing the plurality of pixels. And a lighting device having a first light source arranged to face the first side edge, and at least one opening region of the first opening region, the second opening region, and the third opening region. Have different areas depending on the proximity to the first light source.

FIG. 1 is a perspective view showing the configuration of the liquid crystal display device according to the first embodiment. FIG. 2 is a sectional view showing the liquid crystal display device. FIG. 3 is a circuit diagram showing the liquid crystal display panel and the driving unit shown in FIG. 1, and also a circuit configuration of one subpixel. FIG. 4 is a plan view showing two pixels of the liquid crystal display panel, and is a view showing a configuration of a light shielding layer and a color filter. FIG. 5 is a cross-sectional view showing the liquid crystal display panel along line VV in FIG. FIG. 6 is a plan view showing the illumination device of FIGS. 1 and 2. FIG. 7 is a plan view showing a plurality of aperture areas of a plurality of pixels, a light shielding layer, and a first light source according to the first embodiment. FIG. 8 is a cross-sectional view showing a liquid crystal display device according to Modification 1 of the first embodiment. FIG. 9 is a cross-sectional view showing a liquid crystal display device according to Modification 2 of the first embodiment. FIG. 10 is a graph showing changes in the first luminance, the second luminance, and the light transmittance with respect to the light guide length in the light guide in the liquid crystal display device according to the second modification. FIG. 11 is a plan view showing a plurality of aperture areas of a plurality of pixels, a light shielding layer, and a first light source of the liquid crystal display device according to the modified example 3 of the first embodiment. FIG. 12 is a cross-sectional view showing a liquid crystal display device according to Modification 4 of the first embodiment. FIG. 13 is a plan view showing a plurality of opening regions of a plurality of pixels, a light shielding layer, a first light source, and a second light source of the modified example 4. FIG. 14 is a cross-sectional view showing a liquid crystal display device according to Modification 5 of the first embodiment. FIG. 15 is a plan view showing a plurality of aperture areas of a plurality of pixels, a light shielding layer, and a first light source of the liquid crystal display device according to the second embodiment. FIG. 16 is a plan view showing a plurality of aperture areas of a plurality of pixels, a light shielding layer, and a first light source of a liquid crystal display device according to a modified example 2 of the second embodiment. FIG. 17 is a plan view showing a plurality of aperture regions of a plurality of pixels, a light shielding layer, a first light source, and a second light source of a liquid crystal display device according to the modified example 3 of the second embodiment. FIG. 18 is a plan view showing an illumination device of the liquid crystal display device according to the third embodiment. FIG. 19 is a plan view showing a plurality of opening regions of a plurality of pixels, a light shielding layer, a first light source, and a second light source of the third embodiment. FIG. 20 is a plan view showing a plurality of opening regions of a plurality of pixels, a light shielding layer, a first light source, and a second light source of the liquid crystal display device according to the modified example 1 of the third embodiment. FIG. 21 is a plan view showing an illumination device of a liquid crystal display device according to Modification 3 of the third embodiment. FIG. 22 is a plan view showing a plurality of aperture areas of a plurality of pixels, a light shielding layer, a first light source, and a second light source of Modification 3 of the third embodiment. FIG. 23 is a plan view showing an illumination device of a liquid crystal display device according to Modification 4 of the third embodiment. FIG. 24 is a plan view showing a plurality of aperture areas of a plurality of pixels, a light shielding layer, and a first light source according to Modification 4 of the third embodiment.

Each embodiment and each modification of the present invention will be described below with reference to the drawings. It should be noted that the disclosure is merely an example, and a person having ordinary skill in the art can easily think of appropriate modifications while keeping the gist of the invention, and are naturally included in the scope of the invention. Further, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part as compared with the actual mode, but this is merely an example, and the interpretation of the present invention will be understood. It is not limited. In this specification and each drawing, the same elements as those described in regard to the already-existing drawings are designated by the same reference numerals, and detailed description thereof may be appropriately omitted.

(First embodiment)
First, the liquid crystal display device DSP according to the first embodiment will be described. FIG. 1 is a perspective view showing the configuration of the liquid crystal display device DSP according to the first embodiment. Here, the first direction X and the second direction Y are orthogonal to each other, but may intersect at an angle other than 90°. The third direction Z is orthogonal to each of the first direction X and the second direction Y.
As shown in FIG. 1, the liquid crystal display device DSP includes an active matrix liquid crystal display panel PNL, a driving unit 1 that drives the liquid crystal display panel PNL, an illuminating device IL that illuminates the liquid crystal display panel PNL, a wiring board 2, and the like. ing.

The liquid crystal display panel PNL includes a flat array substrate AR and a flat counter substrate CT. In this embodiment, the array substrate AR functions as a first substrate, and the counter substrate CT functions as a second substrate. The liquid crystal display panel PNL includes a display area DA for displaying an image and a non-display area NDA other than the display area DA. The liquid crystal display panel PNL includes a plurality of pixels PX arranged in a matrix in the first direction X and the second direction Y in the display area DA.

The illumination device IL is arranged on the back surface of the array substrate AR. In the present embodiment, the illumination device IL functions as a backlight unit.
The drive unit 1 is mounted on the array substrate AR. The wiring board 2 is connected and fixed to the liquid crystal display panel PNL.

FIG. 2 is a sectional view showing the liquid crystal display device DSP.
As shown in FIG. 2, the counter substrate CT is arranged to face the array substrate AR with a predetermined gap. The liquid crystal display panel PNL further includes a sealing material SE, a liquid crystal layer LC, a first optical element OD1, and a second optical element OD2. The seal material SE is arranged in the non-display area NDA and joins the array substrate AR and the counter substrate CT. The liquid crystal layer LC is held between the array substrate AR and the counter substrate CT, and is formed in the space surrounded by the array substrate AR, the counter substrate CT, and the sealing material SE.

The first optical element OD1 is arranged on the opposite side of the surface of the array substrate AR, which is in contact with the liquid crystal layer LC. The second optical element OD2 is arranged on the opposite side of the surface of the counter substrate CT in contact with the liquid crystal layer LC. Each of the first optical element OD1 and the second optical element OD2 includes at least a polarizing plate, and may include a retardation plate as necessary. The absorption axis of the polarizing plate included in the first optical element OD1 is, for example, orthogonal to the absorption axis of the polarizing plate included in the second optical element OD2.

The illuminator IL includes a light guide LG, a first light source LU1, and an optical sheet SH. The light guide body LG faces the first optical element OD1 and includes a light guide plate. The light guide LG has a uniform thickness T over the entire area. The light guide LG has the first side edge GS1 in the non-display area NDA and faces the plurality of pixels PX shown in FIG. 1 in the display area DA. The first light source LU1 is arranged to face the first side edge GS1 of the light guide body LG. The first light source LU1 is configured to emit white light toward the first side edge GS1.

The optical sheet SH is located between the light guide LG and the liquid crystal display panel PNL. The optical sheet SH has a plurality of convex portions PR. The plurality of convex portions PR are arranged in a direction in which the first side edge GS1 and the first light source LU1 face each other (here, the first direction X), and extend along the first side edge (here, the second side). Extending in the direction Y). In the present embodiment, the plurality of convex portions PR are arranged at equal pitches in the first direction X. In the present embodiment, the optical sheet SH is a prism sheet and light emitted toward the liquid crystal display panel PNL. Has the function of increasing the parallelism of the.

The illumination device IL may include at least the light guide LG and the first light source LU1. Therefore, the illumination device IL may be configured without the optical sheet SH. Alternatively, the illumination device IL may further include a light reflection plate. In that case, the light guide LG is located between the light reflection plate and the liquid crystal display panel PNL.

FIG. 3 is a circuit diagram showing the liquid crystal display panel PNL and the driving unit 1 shown in FIG. 1, and is also a diagram showing the circuit configuration of one sub-pixel SP. Here, an example of a circuit diagram of the liquid crystal display panel PNL and the driving unit 1 is shown, and the circuit diagram of the liquid crystal display panel PNL and the driving unit 1 is not limited to the circuit diagram shown in FIG.

As shown in FIG. 3, the liquid crystal display panel PNL includes a plurality of pixels PX, a plurality of scanning lines G, a plurality of signal lines S, and a common electrode CE in the display area DA. The plurality of pixels PX are arranged in a matrix. Each pixel PX has a first sub-pixel SP1 of the first color, a second sub-pixel SP2 of the second color, and a third sub-pixel SP3 of the third color. When focusing on the sub-pixel SP, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 are alternately arranged in the first direction X. It goes without saying that the first color, the second color, and the third color are different from each other. In the present embodiment, the first color is red, the second color is green, and the third color is blue.

In the display area DA, each of the scanning lines G extends in the first direction X and each of the signal lines S extends in the second direction Y. In the non-display area NDA, the liquid crystal display panel PNL has a first driver DR1, a second driver DR2, and a third driver DR3. In the present embodiment, the first driver DR1 and the second driver DR2 sandwich the display area DA in the first direction X and each function as a scanning line drive circuit. The third driver DR3 functions as a selection circuit.

Each of the scanning lines G extends in the non-display area NDA and is connected to the first driver DR1 and the second driver DR2. However, the liquid crystal display panel PNL may not include both the first driver DR1 and the second driver DR2, and may include at least one of the first driver DR1 and the second driver DR2. Each of the signal lines S extends to the non-display area NDA and is connected to the third driver DR3. The common electrode CE is shared by the plurality of pixels PX.

The first driver DR1 is electrically connected to the drive unit 1 via the wiring WL1. The second driver DR2 is electrically connected to the drive unit 1 via the wiring WL2. The third driver DR3 is electrically connected to the drive unit 1 via the wiring WL3. The common electrode CE is connected to the common electrode drive circuit in the drive unit 1 via the wiring WL4. The drive unit 1 is electrically connected to a pad group (OLB pad group) PG for outer lead bonding of the liquid crystal display panel PNL via a wiring WL5. The wiring board 2 shown in FIG. 1 is electrically connected to the OLB pad group PG. Various signals and voltages are applied to the drive unit 1 via the wiring board 2.

Unlike the present embodiment, the common electrode driving circuit may be located in the non-display area NDA independently of the driving unit 1 and electrically connected to the driving unit 1 via a wiring. Alternatively, the third driver DR3 may be incorporated in the drive unit 1 without being independent of the drive unit 1.

Each sub-pixel SP includes a switching element SW, a pixel electrode PE, a common electrode CE, a liquid crystal layer LC and the like. The switching element SW is composed of, for example, a thin film transistor (TFT), and is electrically connected to the scanning line G and the signal line S. The pixel electrode PE is electrically connected to the switching element SW. The pixel electrode PE of each sub-pixel SP faces the common electrode CE. The liquid crystal layer LC is driven by the electric field generated between the pixel electrode PE and the common electrode CE. A storage capacitor CS is coupled to the pixel electrode PE. The storage capacitor CS is formed, for example, between an electrode having the same potential as the common electrode CE and an electrode having the same potential as the pixel electrode PE.

Although the detailed configuration of the sub-pixel SP is omitted here, the sub-pixel SP has a display mode utilizing a vertical electric field along the normal line of the main surface of the array substrate AR, and the main surface of the array substrate AR. On the other hand, a display mode using an oblique electric field inclined in an oblique direction, a display mode using a lateral electric field along the main surface of the array substrate AR, and further a combination of the above vertical electric field, lateral electric field, and oblique electric field are appropriately combined. Any of the display modes used can be applied. The main surface of the array substrate AR mentioned here is a surface parallel to the XY plane defined by the first direction X and the second direction Y.

The plurality of pixels PX are arranged in the first direction X and the second direction Y. In other words, the plurality of signal lines S connected to the first sub-pixel SP1 are arranged in the first direction X, and the plurality of scanning lines G are arranged in the second direction Y.
In the present embodiment, when attention is paid to the sub-pixel SP, the plurality of sub-pixels SP are arranged in the first direction X. In other words, all the signal lines S are arranged in the first direction X.

FIG. 4 is a plan view showing two pixels PX of the liquid crystal display panel PNL, and is a diagram showing the configurations of the light shielding layer BM and the color filter. FIG. 4 shows two pixels PX adjacent to each other in the second direction Y among the plurality of pixels PX shown in FIG.
As shown in FIG. 4, the first sub-pixel SP1 has a first opening area A1, the second sub-pixel SP2 has a second opening area A2, and the third sub-pixel SP3 has a third opening area A3. doing. The liquid crystal display panel PNL includes a light blocking layer BM and a color filter. In the present embodiment, the light shielding layer BM and the color filter form the counter substrate CT.

The light shielding layer BM is formed in a grid shape in the first direction X and the second direction Y. The light shielding layer BM is configured to partition the first opening area A1, the second opening area A2, and the third opening area A3. Therefore, the light shielding layer BM can adjust the area of each opening region A. The light shielding layer BM has a plurality of light shielding portions BM1 and a plurality of light shielding portions BM2.

The plurality of light-shielding portions BM1 extend in the first direction X and are arranged side by side in the second direction Y at intervals. For example, each light shield BM1 faces one scanning line G shown in FIG. In addition, the light blocking portion BM1 faces, for example, at least a part of the switching element SW shown in FIG. In this embodiment, the shape of the light blocking portion BM1 is associated with the shape of the scanning line, and the light blocking portion BM1 is formed in a band shape and linearly extends in the first direction X. The light blocking portion BM1 has a width W1 in the second direction Y.

The plurality of light shields BM2 extend in the second direction Y and are arranged side by side in the first direction X at intervals. Each light shield BM2 faces one signal line S shown in FIG. The light blocking portion BM2 does not necessarily have to extend linearly, and a part thereof may be bent or may be tilted from the second direction Y. In this embodiment, the shape of the light shield BM2 is associated with the shape of the signal line S. The light blocking portion BM2 has a width W2 in the first direction X. The light-shielding portion BM1 and the light-shielding portion BM2 are integrally formed and share the intersection.

The color filter has colored layers of a plurality of colors. The color filter has, for example, three colored layers. The color filter includes a plurality of first color layers CL1, a plurality of second color layers CL2, and a plurality of third color layers CL3. In this embodiment, the first color layer CL1 is a red layer (R), the second color layer CL2 is a green layer (G), and the third color layer CL3 is a blue layer (B). The first color layer CL1, the second color layer CL2, and the third color layer CL3 are adjacent to each other, are arranged in order in the first direction X, extend in the second direction Y, and are formed in a strip shape.

The boundary between the colored layers faces the light shielding part BM2. In the present embodiment, each colored layer is shared by the plurality of subpixels SP. Each of the first color layers CL1 is shared by the plurality of first sub-pixels SP1 arranged in the second direction Y and is located at least in the first opening area A1. Each second color layer CL2 is shared by the plurality of second sub-pixels SP2 arranged in the second direction Y and is located at least in the second opening region A2. Each third color layer CL3 is shared by the plurality of third sub-pixels SP3 arranged in the second direction Y and is located at least in the third opening region A3.

FIG. 5 is a cross-sectional view showing the liquid crystal display panel PNL along the line VV in FIG. Note that the illustration of the first optical element OD1 and the second optical element OD2 is omitted in FIG.
As shown in FIG. 5, the array substrate AR has a first insulating substrate 10 having a light transmitting property, such as a glass substrate or a resin substrate. The array substrate AR includes a first insulating layer 11, a second insulating layer 12, a third insulating layer 13, a fourth insulating layer 14, a fifth insulating layer 15, a signal line S, a common electrode CE, a pixel electrode PE, and a first alignment. It is provided with a membrane AL1 and the like.

The first insulating layer 11, the second insulating layer 12, and the third insulating layer 13 are sequentially formed on the first insulating substrate 10. The signal line S is arranged on the third insulating layer 13. The fourth insulating layer 14 is provided on the third insulating layer 13 and the signal line S. The fourth insulating layer 14 is located above the scanning line G, the switching element SW, and the like.

The common electrode CE is provided on the fourth insulating layer 14. The common electrode CE is shared by the plurality of sub-pixels SP. The fifth insulating layer 15 is provided on the fourth insulating layer 14 and the common electrode CE. The first insulating layer 11, the second insulating layer 12, the third insulating layer 13, and the fifth insulating layer 15 are formed of an inorganic insulating material such as silicon nitride (SiN) or silicon oxide (SiO). The fourth insulating layer 14 is formed of an organic insulating material such as acrylic resin.

The pixel electrode PE is arranged on the fifth insulating layer 15 and faces the common electrode CE. The pixel electrode PE and the common electrode CE are formed of a transparent conductive material such as indium zinc oxide (IZO) or indium tin oxide (ITO) as a conductive material. The first alignment film AL1 is formed on the fifth insulating layer 15 and the pixel electrode PE.

Here, the liquid crystal display panel PNL has a configuration compatible with an FFS (Fringe Field Switching) mode as a display mode. Each pixel electrode PE is located between the signal lines S in the first direction X. Further, the pixel electrode PE has a predetermined shape so that an electric field formed between the pixel electrode PE and the common electrode CE can be applied to the liquid crystal layer LC. Here, each pixel electrode PE has a slit SL at a position facing the common electrode CE.

On the other hand, the counter substrate CT includes a second insulating substrate 20 having a light transmitting property, such as a glass substrate or a resin substrate. Further, the counter substrate CT includes a light shielding layer BM, a first color layer CL1, a second color layer CL2, a third color layer CL3, an overcoat layer OC, a second alignment film AL2 and the like.

The light blocking portion BM2 (light blocking layer BM) is provided on the side of the second insulating substrate 20 that faces the array substrate AR. The light blocking portion BM2 faces the signal line S. The first color layer CL1, the second color layer CL2, and the third color layer CL3 are located between the second insulating substrate 20 and the array substrate AR. The respective end portions of the first color layer CL1, the second color layer CL2, and the third color layer CL3 overlap the light blocking portion BM2. The overcoat layer OC is formed of a transparent resin material and covers the first color layer CL1, the second color layer CL2, the third color layer CL3, and the like. The second alignment film AL2 is formed on the side of the overcoat layer OC facing the array substrate AR. In the illustrated example, the first color layer CL1, the second color layer CL2, and the third color layer CL3 configure the counter substrate CT, but may also configure the array substrate AR.

FIG. 6 is a plan view showing the illumination device IL of FIGS. 1 and 2. Note that, in FIG. 6, the light guide LG and the first light source LU1 of the illumination device IL are shown.
As shown in FIG. 6, the light guide LG includes not only the first side edge GS1 but also a second side edge GS2 opposite to the first side edge, the first side edge and the second side edge. And a fourth side edge GS4 connected to the first side edge and the second side edge and opposite to the third side edge GS4.

In the region overlapping with the light guide body LG, nine pixels of the plurality of pixels PX are illustrated. (1) The pixel CO1 is a corner pixel located on the first side edge GS1 side and the third side edge GS3 side. (2) The pixel E1 is an end pixel located between the third side edge GS3 and the fourth side edge GS4 and on the first side edge GS1 side. (3) The pixel CO2 is a corner pixel located on the first side edge GS1 side and the fourth side edge GS4 side. (4) The pixel CO3 is a corner pixel located on the second side edge GS2 side and the third side edge GS3 side. (5) The pixel E2 is an end pixel located between the third side edge GS3 and the fourth side edge GS4 and on the second side edge GS2 side. (6) The pixel CO4 is a corner pixel located on the second side edge GS2 side and the fourth side edge GS4 side. (7) The pixel E3 is an end pixel located on the third side edge GS3 side between the first side edge GS1 and the second side edge GS2. (8) The pixel CN is a central pixel located between the first side edge GS1 and the second side edge GS2 and between the third side edge GS3 and the fourth side edge GS4. (9) The pixel E4 is an end pixel located between the first side edge GS1 and the second side edge GS2 and on the fourth side edge GS4 side.

The first light source LU1 has a plurality of light emitting elements LS that emit white light. In the present embodiment, the light emitting element LS is formed of an LED (light emitting diode). The plurality of light emitting elements LS are arranged along the first side edge GS1. Therefore, light enters the light guide LG from the first side edge GS1 side. Note that, unlike the present embodiment, the first light source LU1 may be arranged along the second side edge GS2, the third side edge GS3, or the fourth side edge GS4. Further, although the first light source LU1 having six light emitting elements LS is shown in FIG. 6, the number of light emitting elements LS may be 5 or less, or 7 or more. The number of the light emitting elements LS may be adjusted in association with the size (for example, length) of the side edge GS facing the first light source LU1.

Here, the wavelength dispersion characteristic of the light guide will be described.
The light guide body is made of a material such as polymethylmethacrylate (PMMA) or polycarbonate (PC). It is known that generally known light guides exhibit wavelength dispersion characteristics in the visible light wavelength range, for example. Even if the first light source LU1 emits white light toward the first side edge GS1 of the light guide LG, the illumination device IL illuminates the entire area of the liquid crystal display panel PNL with white light having the same chromaticity. Things are difficult. This is because the chromaticity of the light emitted from the illumination device IL changes from white light as the optical path length passing through the light guide LG becomes longer.

The wavelength dispersion characteristic is disclosed in, for example, FIG. 5 of International Publication No. WO 2010/061872. It can be seen that in the wavelength range of approximately 400 nm or more, the light transmittance is as high as 80% or more and is substantially constant. However, it can be seen that the light transmittance may be less than 80% in the wavelength range of less than 400 nm. Therefore, it can be seen that the transmittance of light on the short wavelength side tends to decrease in the visible light region.

In this specification, as an example, light in the wavelength range of 380 nm to 780 nm is defined as “visible light”. The blue wavelength range is defined as 380 nm or more and less than 490 nm, the green wavelength range is defined as 490 nm or more and less than 590 nm, and the red wavelength range is defined as 590 nm or more and 780 nm or less.

From the above, the illuminating device IL illuminates the pixel PX located farther from the first light source LU1 with light on the shorter wavelength side, in particular, light with less chromaticity of the blue component. It becomes difficult to make the chromaticity of light uniform over the entire light emission surface of the IL. Therefore, the chromaticity of the display image is adversely affected, and it becomes difficult to obtain a liquid crystal display device DSP having excellent display quality.

Therefore, in the present embodiment, the liquid crystal display panel PNL compensates for the wavelength dispersion characteristic of the light guide LG. Next, a means for compensating the wavelength dispersion characteristic will be described. FIG. 7 is a plan view showing the plurality of opening areas A of the plurality of pixels PX, the light shielding layer BM, and the first light source LU1.

As shown in FIG. 7, the light-shielding layer BM has, in addition to the light-shielding portions BM1 and BM2, a frame-shaped light-shielding portion BM3 that forms the outer peripheral edge of the light-shielding layer BM. In the figure, the light shielding layer BM is provided with a dot pattern. Each pixel PX has three types of opening areas A, which are a first opening area A1, a second opening area A2, and a third opening area A3. In the figure, the first opening area A1 is provided with a diagonal line rising to the right, the second opening area A2 is provided with a diagonal line descending to the right, and the third opening area A3 is provided with a horizontal stripe pattern. The colors of the opening areas A of the first opening area A1, the second opening area A2, and the third opening area A3 are the same as those shown in FIG. 4, the first opening area A1 is red, and the second opening area A2. Is green and the third opening region A3 is blue, and this is the same in the description of the following embodiments.

In the plurality of pixels PX, at least one kind of the plurality of opening areas A among the plurality of first opening areas A1, the plurality of second opening areas A2, and the plurality of third opening areas A3 is close to the first light source LU1. Have different areas.

In the present embodiment, in the pixels CO1, E1, CO2 at the end on the first side edge GS1 side, the first opening region A1 has the first standard area and the second opening region A2 has the second standard area. The third opening area A2 has a third standard area. The pixels E3, CN, E4, CO3, E2, and CO4 located farther from the first light source LU1 have a smaller area of the first opening area A1 than the first standard area and a second opening area A2 of the second area. 2 Smaller than standard area. On the other hand, in the plurality of pixels PX, each of the third opening regions A3 has the third standard area.

The area of each of the first opening region A1 and the second opening region A2 can be adjusted by changing the width W2 of the light shielding portion BM2. When attention is paid to the plurality of pixels PX in each column (the plurality of pixels PX arranged in the second direction Y), the area of the first opening region A1 is constant and the area of the second opening region A2 is constant. The area of the third opening region A3 is constant.

According to the liquid crystal display device DSP according to the first embodiment configured as described above, the light guide LG has a light absorption amount in the red wavelength range and a light absorption amount in the green wavelength range, respectively. , Absorption of light in the blue wavelength range is large. The area of the first opening region A1, the area of the second opening region A2, and the area of the third opening region A3 are set on the basis of the first light source LU1 side. The area of the first opening region A1 and the area of the second opening region A2 are gradually reduced with increasing distance from the first light source LU1.

In the present embodiment, the sub-pixels SP are arranged at equal pitches in the first direction X, while being arranged at equal pitches in the second direction Y. Therefore, the aperture ratio of the first sub-pixel SP1 and the aperture ratio of the second sub-pixel SP2 are gradually decreased with increasing distance from the first light source LU1.

Thereby, even if the liquid crystal display device DSP displays a white image on the entire surface, a good white image can be displayed on the entire display area DA. In other words, the chromaticity of white light can be made uniform over the entire display area DA. Therefore, the above-mentioned wavelength dispersion characteristic can be compensated for in the liquid crystal display panel PNL. In addition, the liquid crystal display panel PNL can be driven by driving for normal white display. Therefore, the above compensation can be achieved without adjusting the driving of the liquid crystal display panel PNL.
From the above, a liquid crystal display device DSP having excellent display quality can be obtained.

(Modification 1 of the first embodiment)
Next, a liquid crystal display device DSP according to the first modification of the first embodiment will be described. FIG. 8 is a cross-sectional view showing a liquid crystal display device DSP according to Modification 1 of the first embodiment.
As shown in FIG. 8, the liquid crystal display device DSP of the first modification example is different from the first embodiment in the shape of the light guide LG. The light guide LG of the first modification is a wedge light guide. The thickness T of the light guide LG is thickest at the first side edge GS1 and becomes smaller as the distance from the first light source LU1 increases.

As described above, in the first modification, the thickness T gradually decreases in the light guiding direction. The light emission rate and light utilization efficiency of the light guide body LG can be improved, and the brightness level of the light emitted by the illumination device IL can be increased. The second side edge GS2 side can contribute to the improvement of the brightness level of the light emitted from the illumination device IL.

(Modification 2 of the first embodiment)
Next, a liquid crystal display device DSP according to Modification 2 of the first embodiment will be described. FIG. 9 is a cross-sectional view showing a liquid crystal display device DSP according to Modification 2 of the first embodiment.
As shown in FIG. 9, the liquid crystal display device DSP of Modification 2 is different from the first embodiment in the configuration of the light guide LG and the optical sheet SH. The light guide LG is a wedge light guide as in the first modification. In the optical sheet SH, the plurality of convex portions PR are arranged closer to each other with increasing distance from the first light source LU1. In other words, the interval between the convex portions PR is narrower on the second side edge GS2 side than on the first side edge GS1 side.

FIG. 10 is a graph showing changes in the first brightness, the second brightness, and the light transmittance with respect to the light guide length in the light guide LG in the liquid crystal display device DSP according to the second modification. The light guide length corresponds to the distance from the first side edge GS1 to the second side edge GS2. The first brightness indicates the brightness level of the light emitted by the illumination device IL. The second brightness indicates the brightness level of the image displayed by the liquid crystal display device DSP. The light transmittance indicates the light transmittance of the pixel PX of the liquid crystal display panel PNL (the area of the opening region of the pixel PX). Here, in the pixel PX having the highest light transmittance, the first opening area A1 has the first standard area, the second opening area A2 has the second standard area, and the third opening area A3 is the third standard area. Have an area. In the second modification, the light transmittance can be translated into the aperture ratio of the pixel PX.

As shown in FIG. 10, it can be seen that the light transmittance of the pixel PX decreases as the light transmittance increases as the distance from the first light source LU1 increases. Therefore, in the second modified example, the plurality of convex portions PR are arranged closer to each other as the distance from the first light source LU1 increases. The light emission rate and light utilization efficiency of the light guide LG can be improved toward the second side edge GS2 side, and the brightness level of the light emitted by the illumination device IL can be increased. Therefore, the first brightness level can be increased as the distance from the first light source LU1 increases.

The light emitted from the illumination device IL has a brightness distribution, and the brightness level of the light transmitted through the liquid crystal display panel PNL can be made uniform in the entire display area DA. Therefore, the second brightness level can be made uniform in the entire display area DA. From the above, the illumination device IL can compensate for the decrease in the brightness level of the display image caused by changing the area of the first opening region A1 and the area of the second opening region A2.

(Modification 3 of the first embodiment)
Next, a liquid crystal display device DSP according to Modification 3 of the first embodiment will be described. FIG. 11 is a plan view showing the plurality of opening regions A of the plurality of pixels PX, the light shielding layer BM, and the first light source LU1 of the liquid crystal display device DSP according to the third modification.
As shown in FIG. 11, in the liquid crystal display device DSP of Modification 3, the third opening region A3 may have an area larger than the third standard area. In the pixels CO1, E1, CO2 at the end on the first side edge GS1 side, the third opening region A3 has the third standard area. The pixels E3, CN, E4, CO3, E2, and CO4 located farther from the first light source LU1 have a larger area of the third opening region A3 than the third standard area.

When focusing on the unit of the pixel PX, the plurality of pixels PX are arranged at equal pitches in the first direction X. However, when focusing on the unit of the sub-pixel SP, the plurality of sub-pixels SP are not arranged at equal pitches in the first direction X. In other words, the plurality of signal lines S are not arranged at equal pitch in the first direction X.

According to the liquid crystal display device DSP of the third modified example configured as described above, the pixels E3, CN, E4, CO3, E2, and CO4 located farther from the first light source LU1 are closer to the third opening area A3. Area is gradually made larger than the third standard area. The total area of the first opening region A1, the second opening region A2, and the third opening region A3 can be the same for all pixels PX. Even if the distance from the first light source LU1 is increased, it is possible to prevent the reduction of the light transmittance of the pixel PX. Therefore, the brightness level of the image displayed by the liquid crystal display device DSP can be made uniform in the entire display area DA without using the illumination device IL as in the second modification.

(Modification 4 of the first embodiment)
Next, a liquid crystal display device DSP according to Modification 4 of the first embodiment will be described. FIG. 12 is a cross-sectional view showing a liquid crystal display device according to the fourth modification. FIG. 13 is a plan view showing a plurality of opening regions A, a light shielding layer BM, a first light source LU1 and a second light source LU2 of a plurality of pixels PX of the present modification 4.
As shown in FIG. 12, the illumination device IL further includes a second light source LU2. The second light source LU2 is arranged to face the second side edge GS2. The light guide LG has a uniform thickness T over the entire area.

As shown in FIG. 13, the second light source LU1 has a plurality of light emitting elements LS that emit white light. The plurality of light emitting elements LS of the second light source LU1 are arranged along the second side edge GS2. Therefore, light is incident on the light guide LG from the second side edge GS2 side.
In the pixels E3, CN, and E4 located between the first side edge GS1 and the second side edge GS2, the first opening area A1 has the first standard area and the second opening area A2 has the second standard area. However, the third opening region A3 has a third standard area.

The pixels CO1, E1, CO2 located closer to the first side edge GS1 than the intermediate position have an area of the first opening area A1 smaller than the first standard area and an area of the second opening area A2 described above. It is smaller than the second standard area. Similarly, for the pixels CO3, E2, CO4 located closer to the second side edge GS2 side than the intermediate position, the area of the first opening area A1 is smaller than the first standard area, and the area of the second opening area A2 is smaller. The area is smaller than the second standard area. In the plurality of pixels PX, each of the third opening regions A3 has the third standard area.

According to the liquid crystal display device DSP of the present fourth modification configured as described above, light is incident on the light guide LG from both the first side edge GS1 side and the second side edge GS2 side. Therefore, with reference to the pixels E3, CN, E4 located in the middle of the first side edge GS1 and the second side edge GS2, the first opening region A1 and the first opening area A1 and the second side edge GS2 are moved toward the first side edge GS1 and the second side edge GS2. The area of each of the two opening regions A2 is reduced.

As a result, even if the liquid crystal display device DSP displays a white image on the entire surface, the chromaticity of white light can be made uniform over the entire display area DA. For example, the chromaticity of white light of each of the pixels CO1, E1, CO2, CO3, E2, and CO4 can be matched with the chromaticity of white light of each of the pixels E3, CN, and E4. Therefore, also in the fourth modification, it is possible to obtain the liquid crystal display device DSP having excellent display quality.

(Modification 5 of the first embodiment)
Next, a liquid crystal display device DSP according to Modification 5 of the first embodiment will be described. FIG. 14 is a sectional view showing a liquid crystal display device according to the fifth modification.
As shown in FIG. 14, the liquid crystal display device according to the fifth modification is different from the fourth modification in the configuration of the light guide LG. The thickness T of the light guide body LG is largest at a position intermediate between the first side edge GS1 and the second side edge GS2. The thickness T of the light guide LG is smaller toward the first side edge GS1 and smaller toward the second side edge GS2 with respect to the intermediate position.

According to the liquid crystal display device DSP of the present fifth modified example configured as described above, light is incident on the light guide LG from both the first side edge GS1 side and the second side edge GS2 side. Therefore, the brightness level of the light emitted from the illumination device IL is likely to be higher as the position is closer to the intermediate position than the first side edge GS1 and the second side edge GS2.

Therefore, in the present fifth modification, the thickness T of the light guide LG is adjusted to be largest at the intermediate position. As the position is closer to the intermediate position than the first side edge GS1 and the second side edge GS2, the light emission rate and the light use efficiency in the light guide body LG can be suppressed, and the brightness level of the light emitted by the illumination device IL can be reduced. Can be lowered.

By providing the light emitted from the illumination device IL with a brightness distribution, the brightness level of the light transmitted through the liquid crystal display panel PNL can be made uniform in the entire display area DA. The illumination device IL can compensate for the variation in the brightness level of the display image caused by changing the area of the first opening region A1 and the area of the second opening region A2. Therefore, the brightness level of the image displayed by the liquid crystal display device DSP can be made uniform in the entire display area DA.

(Second embodiment)
Next, the liquid crystal display device DSP according to the second embodiment will be described. Here, differences from the liquid crystal display device DSP of the first embodiment will be described. FIG. 15 is a plan view showing the plurality of opening regions A of the plurality of pixels PX of the liquid crystal display device DSP according to the second embodiment, the light shielding layer BM, and the first light source LU1.

As shown in FIG. 15, in the second embodiment, the method of changing the area of the opening region A is different from that of the first embodiment. In the end pixels CO3, E2, and CO4 located farthest from the first light source LU1, the first opening area A1 has a first standard area, and each second opening area A2 has a second standard area. However, the third opening region A3 has a third standard area. The pixels CO1, E1, CO2, E3, CN, and E4 located closer to the first light source LU1 have an area of the third opening region A3 smaller than the third standard area. In each of the plurality of pixels PX, each of the first opening regions A1 has the first standard area, and each of the second opening regions A2 has the second standard area.

According to the liquid crystal display device DSP according to the second embodiment configured as described above, the area of the first opening region A1, the area of the second opening region A2, and the area of the third opening region A3 are It is set based on the side edge GS2 side. The area of the third opening region A3 is gradually reduced toward the first light source LU1.
In the present embodiment, the sub-pixels SP are arranged at equal pitches in the first direction X, while being arranged at equal pitches in the second direction Y. Therefore, the aperture ratio of the third sub-pixel SP3 is gradually reduced as it approaches the first light source LU1.

As a result, even if the liquid crystal display device DSP displays a white image on the entire surface, the chromaticity of white light can be made uniform over the entire display area DA. Specifically, the chromaticity of the white light of each of the pixels CO1, E1, CO2, E3, CN, E4 can be matched with the chromaticity of the white light of each of the pixels CO3, E2, CO4. Therefore, the above-mentioned wavelength dispersion characteristic can be compensated for in the liquid crystal display panel PNL. In addition, the liquid crystal display panel PNL can be driven by driving for normal white display.
From the above, a liquid crystal display device DSP having excellent display quality can be obtained.

(Modification 1 of the second embodiment)
Next, a liquid crystal display device DSP according to Modification 1 of the second embodiment will be described. In the first modification, the chromaticity of the light emitted by the first light source LU1 is different from that in the second embodiment. The first light source LU1 is configured to irradiate the first side edge GS1 with light having chromaticity that has more blue components than white.

According to the liquid crystal display device DSP of the first modified example configured as described above, when the chromaticity of the image displayed by the liquid crystal display device DSP is shifted from the desired chromaticity over the entire display area DA, the first light source is used. You may adjust the chromaticity of the light which LU1 irradiates. When the first light source LU1 that emits white light is used and the chromaticity of the image displayed by the liquid crystal display device DSP is entirely yellow, as in the present embodiment, the chromaticity that has more blue components than white. The first light source LU1 that emits light having Thereby, for example, even if the liquid crystal display device DSP displays a white image on the entire surface, the chromaticity of white light can be obtained in the entire display area DA.

Note that the illumination device IL uses the first light source LU1 that emits light having a chromaticity different from white when the chromaticity of the display image shifts from the desired chromaticity, and the chromaticity of the display image is not desired. It is sufficient to compensate for such shifts. Therefore, unlike the first modification, the chromaticity of the light emitted by the first light source LU1 may be a chromaticity that has more red components than white. Alternatively, the chromaticity of the light emitted by the first light source LU1 may be a chromaticity that has more green components than white.

(Modification 2 of the second embodiment)
Next, a liquid crystal display device DSP according to Modification 2 of the second embodiment will be described. FIG. 16 is a plan view showing the plurality of opening regions A of the plurality of pixels PX, the light shielding layer BM, and the first light source LU1 of the liquid crystal display device DSP according to the second modification.
As shown in FIG. 16, in the pixels CO3, E2, and CO4 at the ends, as in the second embodiment, the first opening area A1 has the first standard area and the second opening area A2 has the second standard area. And the third opening area A3 has a third standard area.

However, in the liquid crystal display device DSP of Modification Example 2, the first opening region A1 may have an area larger than the first standard area, and the second opening region A2 has an area larger than the second standard area. May be. In the second modification, the pixels CO1, E1, CO2, E3, CN, and E4 located closer to the first light source LU1 have a larger area of the first opening area A1 than the first standard area and a second opening area A2. Area is larger than the second standard area.

When focusing on the unit of the pixel PX, the plurality of pixels PX are arranged at equal pitches in the first direction X. However, when focusing on the unit of the sub-pixel SP, the plurality of sub-pixels SP are not arranged at equal pitches in the first direction X. In other words, the plurality of signal lines S are not arranged at equal pitch in the first direction X.

According to the liquid crystal display device DSP of the present second modification configured as described above, the areas of the third opening region A3 are closer to the pixels CO1, E1, CO2, E3, CN, and E4 located closer to the first light source LU1. Is gradually smaller than the third standard area, the area of the first opening region A1 is gradually larger than the first standard area, and the area of the second opening region A2 is gradually larger than the second standard area. There is. The total area of the first opening region A1, the second opening region A2, and the third opening region A3 can be the same for all pixels PX. Therefore, the brightness level of the image displayed by the liquid crystal display device DSP can be made uniform in the entire display area DA.

(Modification 3 of the second embodiment)
Next, a liquid crystal display device DSP according to Modification 3 of the second embodiment will be described. FIG. 17 is a plan view showing the plurality of opening regions A of the plurality of pixels PX of the liquid crystal display device DSP according to the third modification, the light shielding layer BM, the first light source LU1, and the second light source LU2.
As shown in FIG. 17, the illumination device IL further includes a second light source IL2. In each of the pixels CO1, E1, CO2 at the end on the first side edge GS1 side and the pixels CO3, E2, CO4 at the end on the second side edge GS2 side, the first opening region A1 has a first standard area, The second opening area A2 has a second standard area, and the third opening area A3 has a third standard area. The areas of the third opening region A3 of the pixels E3, CN, E4 located in the middle of the first side edge GS1 and the second side edge GS2 with respect to the position of the first side edge GS1 are smaller than the third standard area. Pixels E3, CN, and E4 located in the middle of the position of the second side edge GS2 have a smaller area of the third opening region A3 than the third standard area. In each of the plurality of pixels PX, each of the first opening areas A1 has the first standard area, and each of the second opening areas A2 has the second standard area.

According to the liquid crystal display device DSP of the third modified example configured as described above, the area of the first opening region A1, the area of the second opening region A2, and the area of the third opening region A3 are the pixel of the edge. It is set based on CO1, E1, CO2, CO3, E2, and CO4. The area of the third opening region A3 is gradually reduced as it is located between the first side edge GS1 and the second side edge GS2.

As a result, even if the liquid crystal display device DSP displays a white image on the entire surface, the chromaticity of white light can be made uniform over the entire display area DA. Specifically, the chromaticity of light emitted by each of the remaining pixels (pixels E3, CN, E4, etc.) is adjusted to the chromaticity of light exhibited by each of the pixels CO1, E1, CO2, CO3, E2, CO4 at the ends. You can Therefore, also in the third modification, the above-mentioned wavelength dispersion characteristic can be compensated by the liquid crystal display panel PNL.

(Modification 4 of the second embodiment)
Next, a liquid crystal display device DSP according to Modification 4 of the second embodiment will be described.
The liquid crystal display device DSP of Modification 4 may include the same illumination device IL as in Modification 5 of the first embodiment. Except for the illumination device IL, the liquid crystal display device DSP of Modification 4 has the same configuration as that of Modification 3 of the second embodiment.

(Third Embodiment)
Next, a liquid crystal display device DSP according to the third embodiment will be described. Here, differences from the liquid crystal display device DSP of the first embodiment will be described. FIG. 18 is a plan view showing the illumination device IL of the liquid crystal display device DSP according to the third embodiment.
As shown in FIG. 18, in the third embodiment, the first light source LU1 and the second light source LU2 respectively emit a first light emitting element LS1 that emits light of a first color and a light of second color. It has a second light emitting element LS2 and a third light emitting element LS3 that emits light of a third color. In the first light source LU1, the first light emitting element LS1, the second light emitting element LS2, and the third light emitting element LS3 are arranged along the first side edge GS1. In the second light source LU2, the first light emitting element LS1, the second light emitting element LS2, and the third light emitting element LS3 are arranged along the second side edge GS2.

Although the light source LU having the six light emitting elements LS is shown in FIG. 18, the number of the light emitting elements LS may be seven or more. The number of light emitting elements LS may be adjusted in association with the size (eg, length) of the side edge GS facing the light source LU. White light can be combined by making red light, green light, and blue light enter the light guide LG by the first light source LU1 and the second light source LU2.

The color of the light emitted by the light emitting element (first light emitting element LS1) at the end located on the third side edge GS3 side of the first light source LU1 and the end located on the third side edge GS3 side of the second light source LU2. The color of the light emitted by the light emitting element (first light emitting element LS1) is the same. Further, the color of the light emitted by the light emitting element (third light emitting element LS3) at the end of the first light source LU1 located on the fourth side edge GS4 side and the color of the light emitted by the second light source LU2 on the fourth side edge GS4 side. The color of the light emitted from the light emitting element (third light emitting element LS3) at the end of the line is the same.

By the way, the chromaticity of the light emitted from the light guide LG depends on the arrangement of the first light emitting element LS1, the second light emitting element LS2, and the third light emitting element LS3. Therefore, the chromaticity of the light emitted from the light guide LG may be uneven in the plane. For example, the light guide LG (illuminator IL) can illuminate the pixels E1, CN, and E2 located in the middle of the third side edge GS3 and the fourth side edge GS4 with white light.

However, the light guide body LG (illumination device IL) cannot illuminate the pixels CO1, E3, and CO3 at the ends located on the third side edge GS3 side with white light, and thus the red light component of white light It will be illuminated with a lot of light. This is because the pixels CO1, E3, CO3 are most affected by the red light emitted by the first light emitting element LS1 located on the third side edge GS3 side.

Similarly, the light guide body LG (illumination device IL) cannot illuminate the pixels CO2, E4, and CO4 at the end located on the fourth side edge GS4 side with white light, and thus the bluer component than white component. It will be illuminated with a lot of light. This is because the pixels CO2, E4, CO4 are most affected by the blue light emitted by the third light emitting element LS3 located on the fourth side edge GS4 side.
From the above, it is preferable that the liquid crystal display panel PNL compensates for the unevenness of the chromaticity of the light emitted from the light guide LG. Note that, in FIG. 18, the light guide LG is provided with gradation so that it becomes darker in a region where the amount of red component is larger than white and darker in a region where the amount of blue component is larger than white.

Next, a means for compensating the unevenness of the chromaticity of the light emitted from the light guide body LG in the liquid crystal display panel PNL will be described. FIG. 19 is a plan view showing the plurality of opening regions A, the light shielding layer BM, the first light source LU1, and the second light source LU2 of the plurality of pixels PX of the third embodiment. In the third embodiment, the liquid crystal display panel PNL is an arrangement of the liquid crystal display panel PNL of the modified example 4 (FIG. 13) of the first embodiment.

As shown in FIG. 19, in the third embodiment, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 are arranged alternately in the second direction Y.
In the display area DA, each of the scanning lines G extends in the second direction Y, and each of the signal lines S extends in the first direction X. The plurality of pixels PX are arranged at equal pitches in the second direction Y and at equal pitches in the first direction X. In other words, the plurality of signal lines S connected to the first sub-pixel SP1 are arranged at equal pitches in the second direction Y, and the plurality of scanning lines G are arranged at equal pitches in the first direction X. There is. In the present embodiment, when attention is paid to the sub-pixels SP, the plurality of sub-pixels SP are arranged at equal pitches in the second direction Y. In other words, all the signal lines S are arranged at equal pitch in the second direction Y.

In the pixel CN located in the middle of the third side edge GS3 and the fourth side edge GS4 and in the middle of the first side edge GS1 and the second side edge FS2, the first opening region A1 has the first standard area and the second The opening area A2 has a second standard area, and the third opening area A3 has a third standard area. When attention is paid to the pixels E1, CN, and E2 located in the middle of the third side edge GS3 and the fourth side edge GS4, the pixel E1 located closer to the first side edge GS1 side with respect to the position of the pixel CN is the first The area of the opening area A1 is smaller than the first standard area, and the area of the second opening area A2 is smaller than the second standard area. Further, the area of the first opening region A1 is smaller than the first standard area and the area of the second opening region A2 is smaller than that of the pixel E2 located closer to the second side edge GS2 with respect to the position of the pixel CN. 2 Smaller than standard area.

In the corner pixel CO1, the area of the opening region A of the sub-pixel SP of the same color as the color of the light emitted by the light emitting element LS at the end located on the third side edge GS3 side of the first light source LU1 corresponds. It is smaller than the standard area. In the corner pixel CO2, the area of the opening region A of the sub-pixel SP having the same color as the color of the light emitted by the light emitting element LS at the end located on the fourth side edge GS4 side of the first light source LU1 corresponds. It is smaller than the standard area.

In the present embodiment, since the first light emitting element LS1 of the end located on the side of the third side edge GS3 of the first light source LU1 emits red light, the area of the first opening region A1 of the corner pixel CO1 is: It is smaller than the first standard area. Further, since the third light emitting element LS3 of the end located on the fourth side edge GS4 side of the first light source LU1 emits blue light, the area of the third opening region A3 of the corner pixel CO2 is the third standard. Smaller than area.

In the corner pixel CO3, the area of the opening region A of the sub-pixel SP of the same color as the color of the light emitted by the light emitting element LS at the end located on the third side edge GS3 side of the second light source LU2 corresponds. It is smaller than the standard area. In the corner pixel CO4, the area of the opening region A of the sub-pixel SP of the same color as the color of the light emitted by the light emitting element LS at the end located on the fourth side edge GS4 side of the second light source LU2 corresponds. It is smaller than the standard area.

In the present embodiment, since the first light emitting element LS1 of the end of the second light source LU2 located on the side of the third side edge GS3 emits red light, the area of the first opening region A1 of the corner pixel CO3 is: It is smaller than the first standard area. Since the third light emitting element LS3 at the end of the second light source LU2 located on the fourth side edge GS4 side emits blue light, the area of the third opening region A3 of the corner pixel CO4 is the third standard. Smaller than area.

As described above, the pixels CO1, E3, and CO3 at the end located on the side of the third side edge GS3 are illuminated with light having more red component than white. Therefore, the area of the first opening region A1 of the plurality of pixels PX at the ends of the pixels CO1, E3, CO3, etc. located on the side of the third side edge GS3 is defined as the modified example 4 (FIG. 13) of the first embodiment. Compare and change. Similarly, the pixels CO2, E4, and CO4 at the ends located on the fourth side edge GS4 side are illuminated with light having a larger amount of blue component than white. Therefore, the areas of the third opening regions A3 of the plurality of pixels PX at the ends of the pixels CO2, E4, CO4, etc. located on the fourth side edge GS4 side are changed as compared with the modified example 4 of the first embodiment. ing.

In the plurality of pixels CO1, E3, and CO3 at the end located on the third side edge GS3 side, the color of light emitted from the light emitting element LS at the end located on the third side edge GS3 side of the first light source LU1 is the same. The area of the opening area A of the color sub-pixel SP is smaller than the corresponding standard area. In the plurality of pixels CO2, E4, and CO4 at the end located on the fourth side edge GS4 side, the color of light emitted from the light emitting element LS at the end located on the fourth side edge GS4 side of the first light source LU1 is the same. The area of the opening area A of the color sub-pixel SP is smaller than the corresponding standard area.

In the present embodiment, the areas of the first opening regions A1 of the plurality of pixels CO1, E3, and CO3 at the ends located on the third side edge GS3 side are smaller than the first standard area and are the same as each other. The areas of the third opening regions A3 of the plurality of pixels CO2, E4, and CO4 at the ends located on the fourth side edge GS4 side are smaller than the third standard area and are the same.

By the way, not only the plurality of pixels PX in one row at the end including the pixels CO1, E3, and CO3 but also the plurality of rows of pixels PX located on the third side edge GS3 side have a light component having a red component more than white. It may be to illuminate with. Similarly, not only the plurality of pixels PX in one row at the end including the pixels CO2, E4, and CO4 but also the plurality of rows of pixels PX located on the fourth side edge GS4 side have more blue components than white. It may be to illuminate with light.
In that case, the area of the first opening region A1 of the plurality of rows of pixels PX located on the third side edge GS3 side may be smaller than the first standard area. Further, the area of the third opening region A3 of the plurality of pixels PX in the plurality of rows located on the fourth side edge GS4 side may be smaller than the third standard area.

According to the liquid crystal display device DSP according to the third embodiment configured as described above, the first light source LU1 and the second light source LU2 are respectively the first light emitting element LS1 that emits red light and the green light source. It has a second light emitting element LS2 that emits light and a third light emitting element LS3 that emits blue light. Even if it is not affected by the wavelength dispersion characteristic of the light guide LG, the chromaticity of the light emitted from the light guide LG is uneven in the plane.

Therefore, in the third embodiment, the area of the first opening region A1 of the plurality of rows of pixels PX located on the third side edge GS3 side is smaller than the first standard area. Moreover, the area of the third opening region A3 of the plurality of pixels PX in the plurality of rows located on the fourth side edge GS4 side is smaller than the third standard area.

As a result, even if the liquid crystal display device DSP uses the illumination device IL that combines white light with red light, green light, and blue light to display a white image on the entire surface, the entire display area DA is displayed. Thus, the chromaticity of white light can be made uniform.
From the above, a liquid crystal display device DSP having excellent display quality can be obtained.

(Modification 1 of the third embodiment)
Next, a liquid crystal display device DSP according to Modification 1 of the third embodiment will be described. FIG. 20 is a plan view showing a plurality of opening regions A of a plurality of pixels PX, a light shielding layer BM, a first light source LU1, and a second light source LU2 of a liquid crystal display device DSP according to Modification 1 of the third embodiment. Is.

As shown in FIG. 20, the liquid crystal display panel PNL of Modification 1 is different from that of the third embodiment in that the liquid crystal display panel PNL of Modification 3 (FIG. 17) of the second embodiment is arranged. There is. Also in the present modification 1, the area of the first opening region A1 of the plurality of rows of pixels PX located on the side of the third side edge GS3 is smaller than the first standard area. Moreover, the area of the third opening region A3 of the plurality of pixels PX in the plurality of rows located on the fourth side edge GS4 side is smaller than the third standard area.

In the first modification, the pixel E1 at the end located between the third side edge GS3 and the fourth side edge GS4 and on the first side edge GS1 side and the middle between the third side edge GS3 and the fourth side edge GS4. The first opening area A1 has the first standard area, the second opening area A2 has the second standard area, and the third opening, both in the end pixel E2 located on the second side edge GS2 side. The area A3 has a third standard area.
From the above, also in the first modification, the same effect as that of the third embodiment can be obtained.

(Modification 2 of the third embodiment)
Next, a liquid crystal display device DSP according to the second modification of the third embodiment will be described. Unlike the third embodiment and the first modification of the third embodiment, in the second modification, the illumination device IL has the first light source LU1 and does not have to have the second light source LU2. .. The liquid crystal display panel PNL of the second modification is different from the third embodiment and the first modification of the third embodiment, and is a modification of the first embodiment (FIG. 7) and the first embodiment. Liquid crystal display panels PNL such as Example 3 (FIG. 11), the second embodiment (FIG. 15), and Modification 2 (FIG. 16) of the second embodiment are arranged.

Also in this modification 2, the area of the first opening region A1 of the plurality of pixels PX in the plurality of rows located on the third side edge GS3 side is smaller than the first standard area. Further, the area of the third opening region A3 of the plurality of pixels PX on the fourth side edge GS4 side is smaller than the third standard area.

In the second modification, the pixel E1 at the end located between the third side edge GS3 and the fourth side edge GS4 and on the side of the first side edge GS1 or the middle of the third side edge GS3 and the fourth side edge GS4. In the end pixel E2 located on the second side edge GS2 side, the first opening area A1 has the first standard area, the second opening area A2 has the second standard area, and the third opening area A3 is It has a third standard area.
From the above, also in the second modification, the same effect as that of the third embodiment can be obtained.

(Modification 3 of the third embodiment)
Next, a liquid crystal display device DSP according to Modification 3 of the third embodiment will be described. FIG. 21 is a plan view showing an illumination device IL of the liquid crystal display device DSP according to the third modification of the third embodiment.
As shown in FIG. 21, in the illumination device IL, even if the end pixel PX located on the third side edge GS3 side or the end pixel PX located on the fourth side edge GS4 side, the pixel E3 and the pixel E4 are included. In some cases, the plurality of pixels PX located near the middle of the first side edge GS1 and the second side edge GS2 can be illuminated with white.

Next, a means for compensating the unevenness of the chromaticity of the light emitted from the light guide body LG in the liquid crystal display panel PNL will be described. FIG. 22 is a plan view showing a plurality of opening regions A of a plurality of pixels PX, a light shielding layer BM, a first light source LU1 and a second light source LU2 of the modified example 3 of the third embodiment. Similar to the third embodiment, also in the third modification, the liquid crystal display panel PNL is arranged with the liquid crystal display panel PNL of the fourth modification (FIG. 13) of the first embodiment.

As shown in FIG. 22, the first opening region A1 of the pixel E3 has a first standard area. In the plurality of pixels PX (pixels PX of a plurality of rows) located at the end on the third side edge GS3 side, the area of the first opening region A1 of the plurality of first sub-pixels SP1 is equal to the first side edge GS1 and the second side. It is smaller than the first standard area as it is located closer to the first side edge GS1 side than the middle of the edge GS2, and smaller than the first standard area as it is located closer to the second side edge GS2 side than the middle.
However, in the present modified example 3, even if the liquid crystal display panel PNL of the modified example 4 (FIG. 13) of the first embodiment is not arranged, the area of the first opening region A1 is located on the first side edge GS1 side. The liquid crystal display panel PNL is configured so as to be smaller than the first standard area, and smaller toward the second side edge GS2 side than the first standard area. Therefore, in the plurality of pixels PX (pixels PX in a plurality of rows) located at the end on the third side edge GS3 side, the area of the first opening region A1 is different from that of the modified example 4 (FIG. 13) of the first embodiment. You don't have to arrange it.

Alternatively, in the plurality of pixels PX (pixels PX in a plurality of rows) located at the end on the third side edge GS3 side, the closer to the first side edge GS1 from the intermediate position between the first side edge GS1 and the second side edge GS2. The reduction amount of the area of the first opening region A1 is set to be larger than that of the modification 4 of the first embodiment, and the reduction amount of the area of the first opening region A1 is set to be closer to the second side edge GS2 from the intermediate position. The number may be greater than that in the modification 4 of the first embodiment.

The third opening region A3 of the pixel E4 has a third standard area. In the plurality of pixels PX (pixels PX in a plurality of rows) located at the end on the fourth side edge GS4 side, the area of the third opening region A3 of the plurality of third sub-pixels SP3 is equal to the first side edge GS1 and the second side. The area closer to the first side edge GS1 than the middle of the edge GS2 is smaller than the third standard area, and the area closer to the second side edge GS2 is smaller than the third standard area.
From the above, also in the third modification, the same effect as that of the third embodiment can be obtained.

(Modification 4 of the third embodiment)
Next, a liquid crystal display device DSP according to Modification 4 of the third embodiment will be described. FIG. 23 is a plan view showing an illumination device IL of the liquid crystal display device DSP according to the modified example 4 of the third embodiment.
As shown in FIG. 23, the illumination device IL includes the first light source LU1 and does not include the second light source LU2. The illuminating device IL includes the pixel CO3, the pixel CO4, and the like in the first light source LU1 even if the end pixel PX located on the third side edge GS3 side or the end pixel PX located on the fourth side edge GS4 side. In some cases, it may be possible to illuminate a plurality of pixels PX located far away with white.

Next, a means for compensating the unevenness of the chromaticity of the light emitted from the light guide body LG in the liquid crystal display panel PNL will be described. FIG. 24 is a plan view showing a plurality of opening areas A of a plurality of pixels PX, a light shielding layer BM, and a first light source LU1 according to Modification 4 of the third embodiment. In the fourth modification, the liquid crystal display panel PNL is an arrangement of the liquid crystal display panel PNL of the first embodiment (FIG. 7).

As shown in FIG. 24, in the edge pixel E1, the first opening area A1 has a first standard area, the second opening area A2 has a second standard area, and the third opening area A3 has a third standard area. Have an area. In order to compensate the wavelength dispersion characteristic of the light guide LG, the area of the first opening area A1 is smaller than the first standard area and the area of the second opening area A2 is closer to the pixel PX located farther from the first light source LU1. Is smaller than the second standard area.

On the other hand, in order to compensate for the unevenness of the chromaticity of the light emitted from the light guide body LG, in the plurality of pixels PX (pixels PX in a plurality of rows) located at the end on the third side edge GS3 side, the plurality of first sub-pixels The area of the first opening region A1 of SP1 is made smaller than the first standard area as it approaches the first side edge GS1 side from the second side edge GS2.
However, in the present fourth modification, in the plurality of pixels PX (pixels PX in a plurality of rows) located at the end on the third side edge GS3 side, the liquid crystal display panel PNL has the chromaticity of light emitted from the light guide body LG. The unevenness is compensated and the wavelength dispersion characteristic of the light guide LG is compensated. Therefore, in the plurality of pixels PX (pixels PX of multiple rows) located at the end on the side of the third side edge GS3 such as the pixels CO1, E3, and CO3, the area of the first opening region A1 is smaller than the first standard area. small. For example, in the plurality of pixels PX (pixels PX in a plurality of rows) located at the end on the third side edge GS3 side, the areas of the first opening regions A1 may be the same as each other.

The third opening region A3 of the pixel E4 has a third standard area. In the plurality of pixels PX (pixels PX of multiple rows) located at the end on the fourth side edge GS4 side such as the pixels CO2, E4, and CO4, the area of the third opening region A3 of the plurality of third sub-pixels SP3 is It is made smaller than the third standard area as it approaches the first side edge GS1 side from the second side edge GS2.
From the above, also in the fourth modification, the same effect as that of the third embodiment can be obtained.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the scope of equivalents thereof. If necessary, it is possible to combine two or more technologies described in the plurality of embodiments and the plurality of modified examples.

For example, the light emitting element LS may be formed of an element other than the LED. The light emitting element LS may be a laser that emits light (laser light). For example, the illuminating device IL has a plurality of types of lasers, that is, a laser that emits a first color laser beam, a laser that emits a second color laser beam, and a laser that emits a third color laser beam. ..

DSP... Liquid crystal display device, PNL... Liquid crystal display panel, LC... Liquid crystal layer, AR... Array substrate,
CT... Counter substrate, BM... Light shielding layer, CL1, CL2, CL3... Color layer,
PX, CO1, CO2, CO3, CO4, E1, E2, E3, E4, CN... Pixel,
SP, SP1, SP2, SP3... Sub-pixel, IL... Illuminating device, LG... Light guide,
GS1, GS2, GS3, GS4... Side edge, SH... Optical sheet, PR... Convex portion,
LU1, LU2... Light source, LS, LS1, LS2, LS3, LS4... Light emitting element,
DA... display area, NDA... non-display area, A, A1, A2, A3... aperture area.

Claims (21)

A liquid crystal display panel comprising a plurality of pixels arranged in a display region, wherein each pixel has a first sub-pixel of a first color having a first opening region and a second sub-pixel having a second opening region. The second sub-pixel and the third sub-pixel of the third color having the third opening region, and the liquid crystal display panel,
An illumination device having a light guide body having a first side edge and facing the plurality of pixels; and a first light source arranged to face the first side edge,
At least one opening region among the first opening region, the second opening region, and the third opening region has an area that differs according to the degree of proximity to the first light source.
Liquid crystal display device. The liquid crystal display panel,
A plurality of first color layers each located in the first opening region,
A plurality of second color layers respectively located in the second opening regions,
A plurality of third color layers each located in the third opening region;
A light-shielding layer that partitions the first opening region, the second opening region, and the third opening region,
The liquid crystal display device according to claim 1. The first color is red,
The second color is green,
The third color is blue,
In the pixel at the edge on the first side edge side, the first opening region has a first standard area, the second opening region has a second standard area, and the third opening region has a third standard area. Have
The pixel located farther from the first light source has an area of the first opening region smaller than the first standard area, and an area of the second opening region smaller than the second standard area.
The liquid crystal display device according to claim 1. In each of the plurality of pixels, each of the third opening regions has a third standard area.
The liquid crystal display device according to claim 3. The lighting device further includes an optical sheet positioned between the light guide and the liquid crystal display panel,
The thickness of the light guide body is thickest at the first side edge, and becomes smaller as the distance from the first light source increases,
The optical sheet has a plurality of convex portions arranged in a direction in which the first side edge and the first light source face each other and extending in a direction along the first side edge,
The plurality of convex portions are arranged more densely as they are farther from the first light source,
The liquid crystal display device according to claim 3. The pixel located farther from the first light source has a larger area of the third opening region than the third standard area.
The liquid crystal display device according to claim 3. The illuminating device further includes a second light source arranged to face a second side edge of the light guide opposite to the first side edge,
The first color is red,
The second color is green,
The third color is blue,
In the pixel located between the first side edge and the second side edge, the first opening region has a first standard area, the second opening region has a second standard area, and The three open area has a third standard area,
The pixel located closer to the first side edge with respect to the intermediate position,
The area of the first opening region is smaller than the first standard area, and the area of the second opening region is smaller than the second standard area,
The pixel located closer to the second side edge with respect to the intermediate position,
The area of the first opening region is smaller than the first standard area, and the area of the second opening region is smaller than the second standard area.
The liquid crystal display device according to claim 1. In each of the plurality of pixels, each of the third opening regions has a third standard area.
The liquid crystal display device according to claim 7. The thickness of the light guide is
The largest at the middle position,
With respect to the intermediate position, it is smaller as it approaches the first side edge, and smaller as it approaches the second side edge,
The liquid crystal display device according to claim 7. The first color is red,
The second color is green,
The third color is blue,
In the pixel at the end farthest from the first light source, the first opening region has a first standard area, the second opening region has a second standard area, and the third opening The region has a third standard area,
The pixel located closer to the first light source has an area of the third opening region smaller than the third standard area.
The liquid crystal display device according to claim 1. In the plurality of pixels,
Each of the first opening regions has a first standard area,
Each of the second opening regions has a second standard area,
The liquid crystal display device according to claim 10. The first light source irradiates light having chromaticity with more blue component than white light toward the first side edge,
The liquid crystal display device according to claim 10. The area of the first opening region is larger than the first standard area, and the area of the second opening region is larger than the second standard area for the pixel located closer to the first light source.
The liquid crystal display device according to claim 10. The illuminating device further includes a second light source arranged to face a second side edge of the light guide opposite to the first side edge,
The first color is red,
The second color is green,
The third color is blue,
In each of the pixel at the end on the first side edge side and the pixel at the end farthest from the first light source, the first opening region has a first standard area, and the second opening The region has a second standard area, the third opening region has a third standard area,
With respect to the position of the first side edge, the pixel located closer to the middle of the first side edge and the second side edge has an area of the third opening region smaller than the third standard area,
The pixel located closer to the middle of the position of the second side edge has a smaller area of the third opening region than the third standard area.
The liquid crystal display device according to claim 1. In the plurality of pixels,
Each of the first opening regions has a first standard area,
Each of the second opening regions has a second standard area,
The liquid crystal display device according to claim 14. The thickness of the light guide is
The largest at the middle position,
With respect to the intermediate position, it is smaller as it approaches the first side edge, and smaller as it approaches the second side edge,
The liquid crystal display device according to claim 14. The light guide includes a second side edge opposite to the first side edge, a third side edge connected to the first side edge and the second side edge, the first side edge and the second side edge. And a fourth side edge connected to the side edge and opposite to the third side edge,
The first light source includes a first light emitting element that emits the light of the first color, a second light emitting element that emits the light of the second color, and a third light emitting element that emits the light of the third color. Has,
The first light emitting element, the second light emitting element, and the third light emitting element of the first light source are arranged along the first side edge,
The pixel at an end located between the third side edge and the fourth side edge and on the first side edge side, or located between the third side edge and the fourth side edge and on the second side edge side. In the pixel at the edge, the first opening region has a first standard area, the second opening region has a second standard area, and the third opening region has a third standard area,
In the pixel of the corner located on the first side edge side and the third side edge side, a sub color having the same color as the color of the light emitted by the light emitting element at the end of the first light source located on the third side edge side. The area of the pixel opening area is smaller than the corresponding standard area,
In the pixel of the corner located on the first side edge side and the fourth side edge side, a sub color having the same color as the color of light emitted by the light emitting element at the end of the first light source located on the fourth side edge side. The area of the aperture area of the pixel is smaller than the corresponding standard area,
The liquid crystal display device according to claim 1. In the plurality of pixels at the end located on the third side edge side, the opening region of the sub-pixel having the same color as the color of the light emitted by the light emitting element at the end located on the third side edge side of the first light source. Area is smaller than the corresponding standard area,
In the plurality of pixels at the end located on the fourth side edge side, the opening region of the sub-pixel having the same color as the color of the light emitted by the light emitting element at the end located on the fourth side edge side of the first light source. Area is smaller than the corresponding standard area,
The liquid crystal display device according to claim 17. The first color is red,
The second color is green,
The third color is blue,
The liquid crystal display device according to claim 17. In the plurality of pixels at the end located on the third side edge side, among the plurality of sub-pixels of the same color as the color of light emitted by the light emitting element at the end located on the third side edge side of the first light source. The area of the opening region is smaller than the corresponding standard area on the side of the first side edge,
In the plurality of pixels at the end located on the fourth side edge side, among the plurality of sub-pixels of the same color as the color of light emitted by the light emitting element at the end located on the fourth side edge side of the first light source. The area of the opening region is smaller on the first side edge side than the corresponding standard area,
The liquid crystal display device according to claim 17. The light guide includes a second side edge opposite to the first side edge, a third side edge connected to the first side edge and the second side edge, the first side edge and the second side edge. And a fourth side edge connected to the side edge and opposite to the third side edge,
The lighting device further includes a second light source that is arranged to face the second side edge,
The first light source and the second light source respectively emit a first light emitting element that emits the light of the first color, a second light emitting element that emits the light of the second color, and a light of the third color. A third light emitting element for emitting light,
The first light emitting element, the second light emitting element, and the third light emitting element of the first light source are arranged along the first side edge,
The first light emitting element, the second light emitting element, and the third light emitting element of the second light source are arranged along the second side edge,
The color of the light emitted by the light emitting element at the end located on the third side edge side of the first light source and the color of the light emitted by the light emitting element at the end located on the third side edge side of the second light source. Is the same as
The color of the light emitted by the light emitting element at the end located on the fourth side edge side of the first light source and the color of the light emitted by the light emitting element at the end located on the fourth side edge side of the second light source. Is the same as
The pixel located between the third side edge and the fourth side edge and between the first side edge and the second side edge, or between the third side edge and the fourth side edge and the In the pixel at the end located on the first side edge side and the pixel at the end located on the second side edge side intermediate between the third side edge and the fourth side edge, the first opening region has a first standard area. And the second opening region has a second standard area, and the third opening region has a third standard area,
In the pixel of the corner located on the first side edge side and the third side edge side, a sub color having the same color as the color of the light emitted by the light emitting element at the end of the first light source located on the third side edge side. The area of the pixel opening area is smaller than the corresponding standard area,
In the pixel of the corner located on the first side edge side and the fourth side edge side, a sub color having the same color as the color of light emitted by the light emitting element at the end of the first light source located on the fourth side edge side. The area of the pixel opening area is smaller than the corresponding standard area,
In the pixel at the corner located on the second side edge side and the third side edge side, a sub-color having the same color as the color of the light emitted by the light emitting element at the end of the second light source located on the third side edge side. The area of the pixel opening area is smaller than the corresponding standard area,
In the pixel of the corner located on the second side edge side and the fourth side edge side, the sub color of the same color as the color of the light emitted by the light emitting element at the end located on the fourth side edge side of the second light source. The area of the aperture area of the pixel is smaller than the corresponding standard area,
The liquid crystal display device according to claim 1.

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