Liquid crystal display device

Abstract

To provide a liquid crystal display device with which color moire is suppressed.SOLUTION: The liquid crystal display device comprises: a first liquid crystal display panel for displaying a color image in which first main pixels 102 having subpixels 104R, 104G, 104B are arranged in a matrix form; and a second liquid crystal display panel having a second main pixel 202 corresponding to the plurality of first main pixels 102 and for displaying a monochrome image. The second main pixel 202 is divided into a plurality of regions 202A and has a pixel electrode and a plurality of light shields 300 that are arranged in each of the regions 202A. At least some of the plurality of light shields 300 are formed from a switching element connected to the respective pixel electrodes. The plurality of light shields 300 are zig-zag arranged. A light shield 300 located inside of one set of regions 202A formed from adjacent regions 202A form one set of light shields 300, and the one set of light shields 300 block light entering the subpixels 104R, 104G, 104B evenly for each color.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present disclosure relates to a liquid crystal display device. [Background technology]

[0002] There is known a liquid crystal display device that improves contrast by stacking a plurality of liquid crystal panels. For example, Patent Document 1 discloses a display panel including a stacked display liquid crystal panel and a light control panel.

[0003] In Patent Document 1, a display liquid crystal panel realizes a display function, and a light control panel controls light incident on the display liquid crystal panel from a backlight. The light control panel has a plurality of signal lines (gate lines and data lines), at least some of which are bent lines. In Patent Document 1, the signal lines of the light control panel are bent lines, and the signal lines of the light control panel and the grid lines (gate lines and data lines) of the display liquid crystal panel are formed in different patterns, thereby improving the moire of the display panel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2021-535415 Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, the signal lines of the light control panel are bent at a predetermined period. Therefore, the thin film transistors that drive the light control units of the light control panel periodically block light incident on the subpixel units of a specific color of the display liquid crystal panel, which may cause a periodic decrease in the luminance of the subpixel units of the specific color. If the luminance of the subpixel units of a specific color periodically decreases, color moiré occurs in the display panel.

[0006] The present disclosure has been made in consideration of the above circumstances, and has an object to provide a liquid crystal display device in which color moiré is suppressed. [Means for solving the problem]

[0007] In order to achieve the above object, a liquid crystal display device according to a first aspect of the present disclosure comprises: a first liquid crystal display panel in which first main pixels each having a plurality of sub-pixels of different colors are arranged in a matrix in a first direction and a second direction perpendicular to the first direction, and which displays a color image; a second liquid crystal display panel that is located on the opposite side to a viewer side of the first liquid crystal display panel, overlaps the first liquid crystal display panel, has a plurality of second main pixels corresponding to the first main pixels, and displays a monochrome image; the second main pixel is divided into a plurality of regions, and has a pixel electrode and a plurality of light shields disposed in each of the regions; At least some of the light shields are formed of switching elements connected to the pixel electrodes, The plurality of light blocking bodies are arranged in a staggered manner, The light shielding body located within a set of the regions formed by adjacent regions forms a set of the light shielding body, The set of light shields uniformly block light incident on the sub-pixels for each color. Effect of the Invention

[0008] According to the present disclosure, a pair of light shields uniformly shields light of each color incident on a sub-pixel, thereby making it possible to suppress color moiré in a liquid crystal display device. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing a liquid crystal display device according to a first embodiment. [Diagram 2] FIG. 1 is a plan view showing a first liquid crystal display panel according to a first embodiment; [Diagram 3] 1 is a cross-sectional view showing a panel unit and a backlight according to a first embodiment. [Figure 4] FIG. 2 is a plan view showing a second liquid crystal display panel in accordance with the first embodiment. [Diagram 5] FIG. 4 is a plan view showing a second main pixel according to the first embodiment. [Figure 6] 4 is a plan view showing a region of a second main pixel according to the first embodiment. FIG. [Figure 7] 7 is a cross-sectional view of the scanning wiring and the signal wiring shown in FIG. 6 taken along line AA. [Figure 8] 7 is a cross-sectional view of the switching element and the contact hole shown in FIG. 6 taken along line BB. [Figure 9] FIG. 1 is a plan view showing a switching element according to a first embodiment. [Figure 10] FIG. 2 is a plan view showing the external shape of a light blocking body according to the first embodiment. [Figure 11] 5 is a diagram showing overlaps between four second main pixels and sub-pixels according to the first embodiment. FIG. [Figure 12] 5 is a diagram showing an overlap between one second main pixel and a sub-pixel according to the first embodiment. FIG. [Figure 13] 5 is a diagram showing an overlap between a light shield and a sub-pixel according to the first embodiment. FIG. [Figure 14] FIG. 2 is a diagram showing a unit image viewed from the front according to the first embodiment. [Figure 15] FIG. 2 is a diagram showing an example of a unit image viewed from an oblique direction according to the first embodiment. [Figure 16] FIG. 4 is a diagram showing the angle of the viewing direction according to the first embodiment. [Figure 17] FIG. 4 is a diagram showing x values ​​and y values ​​in an evaluation image according to the first embodiment. [Figure 18] FIG. 3 is a diagram showing a light blocking rate according to the first embodiment. [Figure 19] FIG. 11 is a diagram showing a light blocking rate according to a comparative example. [Figure 20] 13A and 13B are diagrams illustrating overlaps between light shields and sub-pixels according to a comparative example. [Figure 21] FIG. 2 is a block diagram showing a display control unit according to the first embodiment. [Figure 22]FIG. 11 is a diagram showing overlaps between four second main pixels and sub-pixels according to the second embodiment. [Diagram 23] FIG. 10 is a diagram showing an overlap between one second main pixel and a sub-pixel according to the second embodiment. [Figure 24] 13 is a diagram showing an overlap between a light shield and a sub-pixel according to the second embodiment. FIG. [Diagram 25] 13 is a diagram showing an overlap between a second main pixel and a sub-pixel according to the third embodiment. FIG. [Figure 26] FIG. 11 is a diagram showing an overlap between one second main pixel and a sub-pixel according to the third embodiment. [Figure 27] FIG. 11 is a cross-sectional view showing a dummy light-shielding layer according to a fourth embodiment. [Figure 28] FIG. 11 is a plan view showing the outer shape of a light shielding body formed from a dummy light shielding layer according to a fourth embodiment. [Figure 29] FIG. 11 is a diagram showing an overlap between a second main pixel and a sub-pixel according to the fourth embodiment. [Diagram 30] FIG. 11 is a diagram showing an overlap between a second main pixel and a sub-pixel according to the fourth embodiment. [Diagram 31] FIG. 13 is a diagram showing an overlap between a second main pixel and a sub-pixel according to the fifth embodiment. [Diagram 32] FIG. 13 is a diagram showing a light blocking rate according to the fifth embodiment. [Diagram 33] FIG. 23 is a diagram showing an overlap between a second main pixel and a sub-pixel according to the sixth embodiment. [Diagram 34] FIG. 13 is a diagram showing an overlap between a second main pixel and a sub-pixel according to the seventh embodiment. [Diagram 35] FIG. 13 is a diagram showing a first light-shielding pattern and a second light-shielding pattern according to a seventh embodiment. [Diagram 36] FIG. 23 is a diagram showing an overlap between a second main pixel and a sub-pixel according to the eighth embodiment. [Figure 37] FIG. 23 is a diagram showing an overlap between a second main pixel and a sub-pixel according to the eighth embodiment. [Figure 38] FIG. 13 is a diagram showing a light blocking rate according to the eighth embodiment. [Figure 39] FIG. 13 is a plan view showing a switching element according to a modified example. [Diagram 40] FIG. 13 is a plan view showing the outer shape of a light blocking body according to a modified example. [Diagram 41] 13A and 13B are diagrams illustrating the arrangement of light blocking bodies according to a modified example. [Diagram 42] 13A and 13B are diagrams illustrating the arrangement of light blocking bodies according to a modified example. [Diagram 43] FIG. 13 is a diagram showing a second main pixel according to a modified example. [Diagram 44] FIG. 13 is a diagram showing an overlap between a second main pixel and a sub-pixel according to a modified example. [Diagram 45] FIG. 13 is a diagram showing a light blocking rate according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a liquid crystal display device according to an embodiment will be described with reference to the drawings.

[0011] <Embodiment 1> A liquid crystal display device 10 according to this embodiment will be described with reference to Figures 1 to 21. The liquid crystal display device 10 displays color images using a first liquid crystal display panel 100 and a second liquid crystal display panel 200, which will be described later.

[0012] As shown in FIG. 1, the liquid crystal display device 10 includes a panel unit 50, a backlight 400, and a display control unit 500. The panel unit 50 includes a first liquid crystal display panel 100 and a second liquid crystal display panel 200. The backlight 400 is a light source that irradiates light to the first liquid crystal display panel 100 and the second liquid crystal display panel 200. The display control unit 500 controls display of the first liquid crystal display panel 100 and the second liquid crystal display panel 200. In this specification, for ease of understanding, the right direction (right direction on the paper) of the liquid crystal display device 10 in FIG. 1 is described as the +X direction, the upward direction (upward on the paper) is described as the +Y direction, and the direction perpendicular to the +X direction and the +Y direction (toward the viewer on the paper) is described as the +Z direction.

[0013] (Panel section) The panel unit 50 has a first liquid crystal display panel 100 and a second liquid crystal display panel 200. The first liquid crystal display panel 100 is located on the viewer's side (+Z side) and displays color images. The second liquid crystal display panel 200 is located on the opposite side to the viewer's side of the first liquid crystal display panel 100 (the rear side of the first liquid crystal display panel 100) and overlaps the first liquid crystal display panel 100. The second liquid crystal display panel 200 displays monochrome images.

[0014] (First LCD panel) The first liquid crystal display panel 100 is, for example, a known transmissive in-plane switching type liquid crystal display panel. The first liquid crystal display panel 100 is active-matrix driven by TFTs (Thin Film Transistors).

[0015] The first liquid crystal display panel 100 has first main pixels 102 arranged in a matrix, as shown in Fig. 2. The first main pixels 102 are formed of a red sub-pixel 104R that emits red light, a green sub-pixel 104G that emits green light, and a blue sub-pixel 104B that emits blue light. The red sub-pixels 104R, green sub-pixels 104G, and blue sub-pixels 104B have rectangular shapes and are aligned in order in the X direction. The red sub-pixels 104R, green sub-pixels 104G, and blue sub-pixels 104B are collectively referred to as sub-pixels 104.

[0016] 3, the first liquid crystal display panel 100 includes a first TFT substrate 110, a first counter substrate 120, a first liquid crystal 130, a first polarizing plate 132, a second polarizing plate 134, and a first driver circuit 136. The first TFT substrate 110 and the first counter substrate 120 sandwich the first liquid crystal 130. The first polarizing plate 132 is provided on the first TFT substrate 110. The second polarizing plate 134 is provided on the first counter substrate 120.

[0017] The first TFT substrate 110 is, for example, a glass substrate. A TFT, a common electrode, a pixel electrode, an alignment film, and the like are provided on a main surface 110a of the first TFT substrate 110 facing the first liquid crystal 130 (none of which are shown). The TFTs of the first TFT substrate 110 are provided to select the sub-pixels 104. The alignment film of the first TFT substrate 110 aligns the first liquid crystal 130.

[0018] Furthermore, a plurality of common lines, a plurality of scanning lines, and a plurality of signal lines are formed on the main surface 110a of the first TFT substrate 110 (none of which are shown). The common line supplies a common voltage to a common electrode that applies a voltage to the first liquid crystal 130. The scanning line supplies a voltage to operate the TFT. The scanning line extends in the X direction. The signal line supplies a voltage to a pixel electrode that applies a voltage to the first liquid crystal 130 via the TFT. The signal line extends in the Y direction. The sub-pixel 104 is surrounded by the signal lines and the scanning lines, and the TFT is provided at the intersection of the scanning lines and the signal lines. A first polarizing plate 132 is provided on a main surface 110b opposite to the main surface 110a of the first TFT substrate 110.

[0019] 3, the first opposing substrate 120 faces the first TFT substrate 110. The first opposing substrate 120 is bonded to the first TFT substrate 110 with a sealant 138. The first opposing substrate 120 is, for example, a glass substrate. A color filter 122, a black matrix BM, an alignment film, etc. are provided on a main surface 120a of the first opposing substrate 120 facing the first liquid crystal 130.

[0020] The color filter 122 is, for example, a striped color filter (a color filter in which the stripe direction is the Y direction) in which color filters of the same color are arranged in the Y direction. The red color filter, the green color filter, and the blue color filter of the color filter 122 are surrounded by a black matrix BM, and correspond to the red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B, respectively. The black matrix BM defines the first main pixel 102 and the sub-pixel 104, as shown in FIG. 2. The alignment film aligns the first liquid crystal 130. A second polarizing plate 134 is provided on the main surface 120b opposite to the main surface 120a of the first counter substrate 120. In FIG. 3, the black matrix BM, the alignment film, and the like are omitted for ease of understanding.

[0021] 3, the first liquid crystal 130 is sandwiched between the first TFT substrate 110 and the first counter substrate 120. The first liquid crystal 130 is, for example, a positive type nematic liquid crystal. The first liquid crystal 130 is aligned in a direction parallel to the main surface 110a of the first TFT substrate 110 by an alignment film. Furthermore, the first liquid crystal 130 rotates in a plane parallel to the main surface 110a of the first TFT substrate 110 when a voltage is applied.

[0022] The first polarizing plate 132 is provided on the main surface 110b of the first TFT substrate 110. The second polarizing plate 134 is provided on the main surface 120b of the first counter substrate 120. Either the transmission axis of the first polarizing plate 132 or the transmission axis of the second polarizing plate 134 is arranged parallel to the alignment direction of the first liquid crystal 130. The transmission axis of the first polarizing plate 132 and the transmission axis of the second polarizing plate 134 are perpendicular to each other. The first polarizing plate 132 is attached to a second counter substrate 220 of the second liquid crystal display panel 200 (described later) by a light-transmitting adhesive layer 150. The adhesive layer 150 is, for example, an OCA (Optical Clear Adhesive).

[0023] The first driver circuit 136 is provided on the main surface 110a of the first TFT substrate 110. The first driver circuit 136 supplies voltages to the scanning lines, the signal lines, and the common lines based on a color image signal supplied from the display control unit 500.

[0024] (2nd LCD panel) 3, the second liquid crystal display panel 200 is located on the rear side (-Z side) of the first liquid crystal display panel 100. The second liquid crystal display panel 200 is attached to the first liquid crystal display panel 100 by an adhesive layer 150. The second liquid crystal display panel 200 displays monochrome images.

[0025] In this embodiment, the second liquid crystal display panel 200 is a transmissive horizontal electric field type liquid crystal display panel using positive liquid crystal. The second liquid crystal display panel 200 is active matrix driven by a switching element 240 described later. The second liquid crystal display panel 200 has second main pixels 202 arranged in a matrix as shown in FIG. 4. In this embodiment, one second main pixel 202 of the second liquid crystal display panel 200 corresponds to 16 first main pixels 102 (4×4: 4 in the X direction and 4 in the Y direction) of the first liquid crystal display panel 100. That is, one second main pixel 202 of the second liquid crystal display panel 200 emits light to the 16 first main pixels 102 of the first liquid crystal display panel 100. In FIG. 4, the scanning lines GL and the signal lines DL are indicated by dashed lines. In the following drawings, the scanning lines GL and the signal lines DL may be indicated by dashed lines or solid lines.

[0026] 3, the second liquid crystal display panel 200 includes a second TFT substrate 210, a second opposing substrate 220, a second liquid crystal 230, a third polarizing plate 232, and a second driver circuit 236. The second TFT substrate 210 and the second opposing substrate 220 sandwich the second liquid crystal 230. The third polarizing plate 232 is provided on the second TFT substrate 210. In this embodiment, the first polarizing plate 132 of the first liquid crystal display panel 100 also serves as a polarizing plate on the light exit side of the second liquid crystal display panel 200. The second liquid crystal display panel 200 does not include a color filter and a black matrix.

[0027] The second TFT substrate 210 is, for example, a glass substrate. A common line (not shown), a plurality of scanning lines GL, a plurality of signal lines DL, an alignment film (not shown), a switching element 240, a pixel electrode 250, a common electrode CE, a light shielding body 300, and the like of the second main pixel 202 are formed on a main surface 210a of the second TFT substrate 210 on the second liquid crystal 230 side, which will be described later. The common line supplies a common voltage to the common electrode CE that applies a voltage to the second liquid crystal 230. The scanning line GL supplies a voltage that operates the switching element 240. The signal line DL supplies a voltage to the pixel electrode 250 that applies a voltage to the second liquid crystal 230 via the switching element 240. The alignment film aligns the second liquid crystal 230. A third polarizing plate 232 is provided on a main surface 210b opposite to the main surface 210a of the second TFT substrate 210.

[0028] In this embodiment, the light shield 300 of the second main pixel 202 is formed of the switching element 240. The configurations of the second main pixel 202, the scanning line GL, the signal line DL, etc. will be described later.

[0029] The second opposing substrate 220 faces the second TFT substrate 210. The second opposing substrate 220 is bonded to the second TFT substrate 210 by a sealant 238. The second opposing substrate 220 is, for example, a glass substrate. An alignment film (not shown) that aligns the second liquid crystal 230 is provided on a main surface 220a of the second opposing substrate 220 facing the second liquid crystal 230. An adhesive layer 150 is provided on a main surface 220b of the second opposing substrate 220 opposite to the main surface 220a. The second opposing substrate 220 is bonded to the first liquid crystal display panel 100 (first polarizing plate 132) via the adhesive layer 150.

[0030] The second liquid crystal 230 is sandwiched between the second TFT substrate 210 and the second opposing substrate 220. The second liquid crystal 230 is a positive type nematic liquid crystal. The second liquid crystal 230 is initially aligned in the Y direction by an alignment film. The second liquid crystal 230 rotates in a plane parallel to the main surface 210a of the second TFT substrate 210 when a voltage is applied.

[0031] The third polarizer 232 is provided on the main surface 210b of the second TFT substrate 210. The transmission axis of the third polarizer 232 is arranged parallel to the alignment direction of the second liquid crystal 230. The transmission axis of the third polarizer 232 and the transmission axis of the first polarizer 132 (the polarizer on the light exit side of the second liquid crystal display panel 200) of the first liquid crystal display panel 100 are perpendicular to each other, and the second liquid crystal display panel 200 operates in a normally black mode.

[0032] The second driver circuit 236 is provided on the main surface 210a of the second TFT substrate 210. The second driver circuit 236 supplies voltages to the scanning lines GL, the signal lines DL, and the common lines based on a signal supplied from the display control unit 500.

[0033] The configuration of the scanning line GL, the signal line DL, and the second main pixel 202 will be described with reference to Figs. 4 to 8. Fig. 5 is a plan view showing the second main pixel 202. Fig. 6 is a plan view showing the region 202A of the second main pixel 202. Fig. 7 is a cross-sectional view of the scanning line GL and the signal line DL shown in Fig. 6 taken along line AA. Fig. 8 is a cross-sectional view of the switching element 240 and the contact hole CH shown in Fig. 6 taken along line BB. Fig. 9 is a plan view showing the switching element 240. For ease of understanding, the first insulating layer 282, the second insulating layer 284, etc. are omitted in Figs. 5, 6, and 9.

[0034] The second main pixel 202 has a rectangular shape as shown in FIG. 4. The second main pixel 202 is divided into four regions 202A of two rows and two columns in the X and Y directions as shown in FIG. 5. As shown in FIGS. 5 and 6, a switching element 240 and a pixel electrode 250 are arranged in each of the regions 202A. One second main pixel 202 (four pixel electrodes 250) is driven by a voltage (signal) from a pair of adjacent scanning lines GL and a pair of adjacent signal lines DL. That is, the same gate signal and the same data signal are simultaneously input to each of the four switching elements 240. Note that the pair of adjacent scanning lines GL may be two scanning lines GL branched from one scanning line. The pair of adjacent signal lines DL may be two signal lines DL branched from one signal line.

[0035] 4 to 6, the scanning lines GL extend linearly in the X direction. The scanning lines GL are formed on the major surface 210a of the second TFT substrate 210, and are covered with a first insulating layer 282, as shown in FIG.

[0036] 4 to 6, the signal wiring DL extends linearly in the Y direction. The signal wiring DL branches in the X direction and is connected to the switching element 240. The signal wiring DL is formed on the first insulating layer 282 and covered with the second insulating layer 284, as shown in FIG.

[0037] 7 and 8, the common electrode CE of the second main pixel 202 is formed on the second insulating layer 284. The common electrode CE is made of, for example, ITO (Indium Tin Oxide). The common electrode CE is covered with a third insulating layer 286.

[0038] Each of the pixel electrodes 250 of the second main pixel 202 has a comb-tooth shape and is disposed in each of the four regions 202A, as shown in Figures 5 and 6. Each of the pixel electrodes 250 is connected to each of the switching elements 240 (drain electrodes 248). The pixel electrodes 250 are formed on the third insulating layer 286, as shown in Figure 8. The pixel electrodes 250 are formed of, for example, ITO.

[0039] Each of the switching elements 240 of the second main pixel 202 is connected to a corresponding pixel electrode 250. As described later in this specification, the switching elements 240 form a light shield 300 that blocks light emitted from the backlight 400 and incident on the sub-pixel 104 (first main pixel 102) of the first liquid crystal display panel. In other words, the switching elements 240 also function as a light shield that blocks light emitted from the backlight 400 and incident on the sub-pixel 104 of the first liquid crystal display panel.

[0040] 8 and 9, the switching element 240 has a gate electrode 242, a semiconductor layer 244, a source electrode 246, and a drain electrode 248. The switching element 240 is, for example, a TFT element. The arrangement of the switching element 240 (light shield 300) will be described later.

[0041] The gate electrode 242 is formed on the main surface 210a of the second TFT substrate 210 integrally with the scanning line GL. The gate electrode 242 is covered with the first insulating layer 282, as is the scanning line GL. The semiconductor layer 244 is provided in an island shape on the gate electrode 242 via the first insulating layer 282. The semiconductor layer 244 is formed of, for example, amorphous silicon. The source electrode 246 is formed integrally with the signal line DL. The drain electrode 248 extends in the X direction from above the semiconductor layer 244 and connects to the pixel electrode 250. As shown in FIG. 8, the drain electrode 248 is connected to the pixel electrode 250 at a contact portion 248a via a contact hole CH that penetrates the third insulating layer 286 and the second insulating layer 284. The gate electrode 242, the source electrode 246, and the drain electrode 248 are formed of a metal having a light-shielding property, such as aluminum (Al) or molybdenum (Mo).

[0042] 7 and 8, the first insulating layer 282 covers the scanning line GL and the gate electrode 242 of the switching element 240. The second insulating layer 284 covers the semiconductor layer 244, source electrode 246, drain electrode 248, and first insulating layer 282 of the switching element 240. The third insulating layer 286 covers the common electrode CE and the second insulating layer 284. The first insulating layer 282, the second insulating layer 284, and the third insulating layer 286 are formed of silicon nitride (SiNx), silicon oxide (SiOx), or the like.

[0043] Since the gate electrode 242, source electrode 246 and drain electrode 248 of the switching element 240 are made of a metal having light-shielding properties, the switching element 240 including the contact portion 248a of the drain electrode 248 functions as a light shield that blocks light emitted from the backlight 400 and incident on the sub-pixel 104 of the first liquid crystal display panel. When viewed in a plan view from the observer side, the light shield 300 formed from the switching element 240 has the external shape shown in FIG.

[0044] The arrangement of the light shield 300 (switching element 240) and the overlap of the light shield 300 with the sub-pixels 104 of the first liquid crystal display panel 100 will be described below with reference to Figs. 11 to 13. Fig. 11 shows the overlap of four second main pixels 202 with the sub-pixels 104. Fig. 12 shows the overlap of one second main pixel 202 with the sub-pixel 104. Fig. 13 shows the overlap of the light shield 300 with the sub-pixel 104. Note that the black matrix BM of the first liquid crystal display panel 100 is omitted in Figs. 11 to 13 and the following figures.

[0045] In this embodiment, one second main pixel 202 corresponds to 16 first main pixels 102 arranged in 4 rows and 4 columns in the X and Y directions, as shown in Figures 11 and 12. The second main pixel 202 is divided into four regions 202A arranged in 2 rows and 2 columns in the X and Y directions. Each region 202A corresponds to four first main pixels 102 arranged in 2 rows and 2 columns in the X and Y directions.

[0046] In this embodiment, two regions 202A adjacent to each other in the X direction form one set 204A. Two light blocking bodies 300 are located within the set 204A of the region 202A. In addition, in the set 204A adjacent to each other in the Y direction, the position of the set 204A is shifted in the X direction by one region 202A.

[0047] Furthermore, two light shields 300 located within a set 204A of a region 202A form one set 302A. The two light shields 300 forming the set 302A of light shields 300 are arranged close to each other. As shown in FIG. 11, it is preferable that the set 302A of light shields 300 is arranged at intervals twice the width of the region 202A in the X direction and twice the width of the region 202A in the Y direction. In the set 204A of the region 202A adjacent in the Y direction, the position of the set 204A is shifted in the X direction by one region 202A, so that the arrangement of the light shields 300 is a staggered arrangement shifted by half a pitch in the X direction and the Y direction in units of the set 302A. In addition, the light shields 300 forming the set 302A of light shields 300 correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the two regions 202A forming the set 204A of regions 202A, and in Figure 5, correspond to two switching elements 240 located on the +Y side and adjacent to each other.

[0048] As shown in FIGS. 11 to 13, the set 302A of light shields 300 overlaps with four sub-pixels 104 that are consecutively arranged in the X direction, and blocks light incident on these sub-pixels 104. Specifically, the set 302A of light shields 300 overlaps with four sub-pixels 104 that are arranged in the order of green sub-pixel 104G, blue sub-pixel 104B, red sub-pixel 104R, and green sub-pixel 104G from the -X side. The set 302A of light shields 300 blocks light that is emitted from the backlight 400 and enters these sub-pixels 104. The light shields 300 that form the set 302A of light shields 300 located on the -X side span the green sub-pixel 104G and the blue sub-pixel 104B, and block light that is incident on the green sub-pixel 104G and the blue sub-pixel 104B. Furthermore, the light shielding body 300 located on the +X side among the light shielding bodies 300 forming the set 302A of light shielding bodies 300 spans the red sub-pixel 104R and the blue sub-pixel 104B and blocks light incident on the red sub-pixel 104R and the green sub-pixel 104G.

[0049] As shown in FIG. 13, if the area over which the light shielding body 300 located on the -X side shields the green sub-pixel 104G is S1, the area over which the light shielding body 300 located on the -X side shields the blue sub-pixel 104B is S2, the area over which the light shielding body 300 located on the +X side shields the red sub-pixel 104R is S3, and the area over which the light shielding body 300 located on the +X side shields the green sub-pixel 104G is S4, then the light shielding body 300 located on the -X side and the light shielding body 300 located on the +X side are positioned such that S1+S4=S2=S3. Therefore, the area (S1+S4) over which the set 302A of light shields 300 shields the green subpixel 104G (two green subpixels 104G), the area (S2) over which the set 302A of light shields 300 shields the blue subpixel 104B, and the area (S3) over which the set 302A of light shields 300 shield the red subpixel 104R. In other words, the set 302A of light shields 300 uniformly shields the subpixels 104 that are consecutively arranged in the X direction for each color.

[0050] In this embodiment, the sets 302A of light shields 300 are arranged in a staggered manner in the X and Y directions in units of sets 302A, and the sub-pixels 104 that are consecutively arranged in the X direction are evenly shielded for each color by the sets 302A of light shields 300, so that the sub-pixels 104 of a specific color are not shielded periodically. Furthermore, color differences caused by the sub-pixels 104 being shielded are averaged out for the entire display of the liquid crystal display device 10. Therefore, the liquid crystal display device 10 can suppress color moiré.

[0051] Furthermore, in one second main pixel 202, four light shielding bodies 300 (FIG. 12) located within the second main pixel 202 are arranged in a set of four to uniformly shield the sub-pixels 104 of each color from light. As a result, even if there is a misalignment between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or even if the display of the liquid crystal display device 10 is viewed from an oblique direction, the four light shielding bodies 300 can uniformly shield the sub-pixels 104 of different colors from light in a set of four. Therefore, the liquid crystal display device 10 can further suppress color moiré.

[0052] Here, the suppression of color moiré by the group 302A of light shields 300 uniformly shielding the sub-pixels 104 arranged consecutively in the X direction for each color will be described. In this description, the size of 16 first main pixels 102 (4 rows and 4 columns) in the liquid crystal display device 10 is 259 μm×259 μm. Also, the area of ​​one light shield 300 in the liquid crystal display device 10 is 1469 μm 2 It is.

[0053] First, unit images were created that mimicked the set 302A of 16 first main pixels 102 and light shields 300 as viewed from the observer side. The created unit images were a unit image in which the set 302A of 16 first main pixels 102 and light shields 300 was viewed from the front, and a unit image in which the set 302A of 16 first main pixels 102 and light shields 300 was viewed from an oblique direction. Fig. 14 shows a unit image viewed from the front. Fig. 15 shows an example of a unit image viewed from an oblique direction.

[0054] In a unit image viewed from an oblique direction, the position of the pair 302A of the light shielding bodies 300 is shifted by a distance LX in the +X direction from the position of the pair 302A of the light shielding bodies 300 in the unit image viewed from the front, depending on the viewing angle θ (θ=2.2°, 4.3°, 6.3°, 8.3°, 10.3°, 12.3°) in consideration of the thickness, refractive index, etc. of the first liquid crystal display panel 100 and the second liquid crystal display panel 200. (For example, L1=22 μm for θ=2.2°.) The viewing direction is a direction toward the -X side from the front, and the angle θ is an angle (counterclockwise) with respect to the +Z direction, as shown in FIG. 16.

[0055] In the unit image, the red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B have their respective colors (red, green, and blue), and the brightness of the colors of the red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B is set to a brightness in which the first main pixel 102 displays white when viewed from the front. The light shields 300 are represented in black. For ease of understanding, two light shields 300 that do not form a pair 302A among the second main pixels 202 corresponding to the 16 first main pixels 102 are omitted.

[0056] Next, the created unit images were arranged in a matrix (for example, m pieces x n pieces) to create an evaluation image viewed from the front (1024 pixels x 1024 pixels) and an evaluation image viewed from an oblique direction (θ = 2.2°, 4.3°, 6.3°, 8.3°, 10.3°, 12.3°). Furthermore, from the created evaluation images, RGB values ​​(8 bits, 0 to 255 levels) were obtained by averaging the entire evaluation image. Then, x values ​​and y values ​​in the CIE color space were obtained from the obtained RGB luminance values. Figure 17 shows the x values ​​and y values ​​in the evaluation image viewed from the front and the evaluation image viewed from an oblique direction.

[0057] 17, the range in which the x and y values ​​vary depending on the viewing direction is less than 0.01. According to subjective evaluation, if the range in which the x and y values ​​vary is 0.01 or less, the viewer cannot perceive color moiré or does not mind it.

[0058] The evaluation image corresponds to a state in which a liquid crystal display device in which a set 302A of light shielding bodies 300 evenly shields sub-pixels 104 of different colors that are successively arranged in the X direction from light, is viewed from the front or obliquely. Therefore, color moiré can be suppressed by having the set 302A of light shielding bodies 300 evenly shield sub-pixels 104 of different colors that are successively arranged in the X direction from light, for each color.

[0059] Next, the viewing angle θ and the light blocking rate SH of the light blocking body 300 will be described. The light blocking rate SH of the light blocking body 300 is the ratio of the area of ​​the light blocking body 300 (four light blocking bodies) located within one second main pixel 202 blocking light from the backlight 400 that enters the apertures of each of the red sub-pixels 104R (16 sub-pixels), green sub-pixels 104G (16 sub-pixels), and blue sub-pixels 104B (16 sub-pixels) corresponding to one second main pixel 202. As described above, the position of the light blocking body 300 with respect to the sub-pixels 104 changes depending on the viewing angle θ, and therefore the light blocking rate SH of the light blocking body 300 changes depending on the viewing angle θ.

[0060] Fig. 18 shows the light blocking rate SH of this embodiment, and Fig. 19 shows the light blocking rate SH of a comparative example. In the main pixel 700 of the comparative example, the four light blocking bodies 300 are arranged in parallel rows in the X direction and the Y direction, as shown in Fig. 20.

[0061] First, the light blocking rate SH of the comparative example will be described. As shown in FIG. 19, when the angle of the viewing direction is gradually changed from the front (0°) to the oblique direction, the light blocking rate SH of the green subpixel 104G increases slightly from the front and decreases from the angle θ=2.2°. On the other hand, the light blocking rate SH of the red subpixel 104R and the blue subpixel 104B at the angle θ=2.2° is small. Therefore, at the angle θ=2.2° in the comparative example, the mixture of red and blue colors is emphasized. The light blocking rate SH of the blue subpixel 104B increases from the front to the angle θ=6.3° and decreases after the angle θ=6.3°. On the other hand, at the angle θ=6.3°, the light blocking rate SH of the red subpixel 104R and the green subpixel 104G is small. Therefore, at the angle θ=6.3° in the comparative example, the mixture of red and green colors is emphasized. The light blocking rate SH of the red subpixel 104R decreases from the front until the angle θ=2.2°, and increases from the angle θ=4° toward the angle θ=10.3°. On the other hand, at the angle θ=10.3°, the light blocking rate SH of the green subpixel 104G and the blue subpixel 104B is small. Therefore, at the angle θ=10.3° in the comparative example, the mixed color of green and blue is emphasized. That is, in the comparative example, as the viewing angle changes, the subpixel 104 that is blocked by the light blocking body 300 changes from the green subpixel 104G to the blue subpixel 104B, and then from the blue subpixel 104B to the red subpixel 104R, so that the mixed color balance of red, green, and blue becomes biased. As a result, the observer visually recognizes color moiré.

[0062] In this embodiment, as shown in FIG. 18, the light blocking ratios SH of the red subpixel 104R, the green subpixel 104G, and the blue subpixel 104B are different at angles θ=2.2°, 6.3°, and 10.3°. On the other hand, the change in the light blocking ratio SH with respect to the viewing angle θ is small. Furthermore, the light blocking ratios SH of the red subpixel 104R, the green subpixel 104G, and the blue subpixel 104B are substantially equal at angles θ=0°, 4.3°, and 8.3°. Therefore, even if there is a misalignment in the overlapping between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or even if the display of the liquid crystal display device 10 is viewed from an oblique direction, the imbalance of the mixed color of red, green, and blue is suppressed. As a result, the four light blocking bodies 300 can block the different color subpixels 104 substantially equally for each color, and the liquid crystal display device 10 can suppress color moiré.

[0063] (Backlight) 1, the backlight 400 is disposed on the rear side (-Z side) of the second liquid crystal display panel 200. The backlight 400 is, for example, a direct type backlight. The backlight 400 includes white LED (Light emitting diode) elements, a reflective sheet, a diffusion sheet, and the like (none of which are shown).

[0064] (Display control unit) The display control unit 500 controls the display of the first liquid crystal display panel 100 and the second liquid crystal display panel 200. The display control unit 500 includes an image data distribution unit 510, a first image signal generation unit 520, a second image luminance signal generation unit 530, and a second image signal generation unit 540, as shown in FIG.

[0065] The image data distribution unit 510 distributes the input image data to a first image signal generation unit 520 and a second image luminance signal generation unit 530 .

[0066] The first image signal generating unit 520 generates a color image to be displayed on the first liquid crystal display panel 100 from the input image data distributed from the image data distributing unit 510. Specifically, a first gradation converting unit 522 of the first image signal generating unit 520 performs gradation conversion to convert the distributed input image data into color image data having luminance-gradation characteristics suitable for the first liquid crystal display panel 100. For example, a lookup table in which input / output relationships are preset is used for data conversion. The first image signal generating unit 520 transmits a color image signal representing the generated color image to the first driver circuit 136 of the first liquid crystal display panel 100.

[0067] The second image luminance signal generating unit 530 generates a luminance signal for generating a monochrome image to be displayed on the second liquid crystal display panel 200 from the input image data distributed from the image data distributing unit 510. The second image luminance signal generating unit 530 obtains a luminance level of one second main pixel 202 of the second liquid crystal display panel 200 from, for example, an average value, a frequent value, a minimum value, a maximum value, or the like of red gradation value, green gradation value, and blue gradation value of 16 first main pixels 102 of the first liquid crystal display panel 100 to which light emitted from one second main pixel 202 of the second liquid crystal display panel 200 is incident. The obtained luminance level may be a gradation value. The second image luminance signal generating unit 530 transmits a luminance signal representing the obtained luminance level to the second image signal generating unit 540.

[0068] The second image signal generating section 540 generates a monochrome image to be displayed on the second liquid crystal display panel 200 based on the luminance signal transmitted from the second image luminance signal generating section 530. The second image signal generating section 540 generates a monochrome image by performing, for example, averaging processing and gradation conversion. Specifically, the calculation section 542 of the second image signal generating section 540 averages the luminance levels of the second main pixels 202 located within a predetermined distance of the second main pixel 202 of interest, for example, by weighted averaging based on the distance from the second main pixel 202 of interest. This allows the second image signal generating section 540 to generate a monochrome image with blurred edges. Furthermore, the second gradation converting section 544 of the second image signal generating section 540 generates monochrome image data having luminance-gradation characteristics suitable for the second liquid crystal display panel 200. The configuration of the second gradation converting section 544 is similar to that of the first gradation converting section 522 of the first image signal generating section 520.

[0069] The monochrome image signal transmitted to the second liquid crystal display panel 200 is delayed with respect to the color image signal transmitted to the first liquid crystal display panel 100 due to the calculation of the brightness level, averaging processing, etc. performed by the second image brightness signal generation unit 530. Therefore, the display control unit 500 is provided with a synchronization circuit (not shown) to synchronize the output of the monochrome image signal and the color image signal. The synchronization circuit causes a monochrome image corresponding to the color image of the first liquid crystal display panel 100 to be displayed on the second liquid crystal display panel 200, so that an appropriate color image is displayed on the liquid crystal display device 10.

[0070] The display control unit 500 includes a CPU (Central Processing Unit), a memory, etc. The functions of the display control unit 500 are realized, for example, by the CPU executing a program stored in the memory.

[0071] As described above, the sets 302A of light shields 300 are arranged in a staggered manner in units of sets 302A, and the sub-pixels 104 that are consecutively arranged in the X direction are evenly shaded for each color by the sets 302A of light shields 300, thereby enabling the liquid crystal display device 10 to suppress color moiré. Furthermore, the four light shields 300 located within the second main pixel 202, in a set of four, evenly shade the sub-pixels 104 for each color, enabling the liquid crystal display device 10 to further suppress color moiré.

[0072] Furthermore, since the second main pixel 202 of the second liquid crystal display panel 200 is divided into a plurality of regions 202A and a pixel electrode 250 is provided for each region 202A, the liquid crystal display device 10 can suppress the occurrence of dark spots that are easily noticeable to the viewer.

[0073] <Embodiment 2> In the first embodiment, the second main pixel 202 of the second liquid crystal display panel 200 is divided into four regions 202A of two rows and two columns. The number of divisions of the second main pixel 202 is not limited to four. The liquid crystal display device 10 of the present embodiment includes a panel unit 50, a backlight 400, and a display control unit 500, similar to the liquid crystal display device 10 of the first embodiment. The configurations of the switching elements 240 (light shields 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 of the present embodiment are similar to those of the first embodiment. Here, the arrangement of the light shields 300 and the overlap between the light shields 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described.

[0074] In this embodiment, one second main pixel 202 corresponds to 16 first main pixels 102 arranged in 4 rows and 4 columns in the X and Y directions, as in the first embodiment. The second main pixel 202 in this embodiment is divided into 12 regions 202A arranged in 4 rows and 3 columns in the X and Y directions, as shown in Figures 22 and 23. Each of the regions 202A corresponds to four sub-pixels 104 arranged in the X direction.

[0075] Furthermore, four adjacent regions 202A arranged in two rows and two columns in the X and Y directions form one set 204A. Four light blocking bodies 300 are located within the set 204A of the region 202A. In the sets 204A adjacent to each other in the Y direction, the positions of the sets 204A are shifted in the X direction by one region 202A.

[0076] In this embodiment, four light shields 300 located within the set 204A of the region 202A form one set 302A. The four light shields 300 forming the set 302A of the light shields 300 are aligned in a line in the X direction and arranged closely to each other, as shown in Figs. 22 to 24. The light shields 300 forming the set 302A of the light shields 300 correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the four regions 202A forming the set 204A of the region 202A.

[0077] 22, it is preferable that the sets 302A of the light shields 300 are arranged at intervals in the X direction that are twice the width of the regions 202A in the X direction, and are arranged at intervals in the Y direction that are four times the width of the regions 202A in the Y direction. In sets 204A of regions 202A adjacent in the Y direction, the positions of the sets 204A are shifted in the X direction by one region 202A, so that the light shields 300 are arranged in a staggered arrangement shifted by half a pitch in the X and Y directions in units of sets 302A. In this embodiment, the four light shields 300 forming the set 302A of the light shields 300 are also referred to as light shield 300a, light shield 300b, light shield 300c, and light shield 300d in order from the -X side.

[0078] 22 to 24, the set 302A of light shields 300 overlaps with eight subpixels 104 arranged in two rows and four columns in the X and Y directions, and blocks light incident on these subpixels 104. In an example shown in Fig. 23, the set 302A of light shields 300 overlaps with, in order from the -X side, two blue subpixels 104B, two red subpixels 104R, two green subpixels 104G, and two blue subpixels 104B. The set 302A of light shields 300 blocks light emitted from the backlight 400 and incident on these subpixels 104.

[0079] The light shield 300a extends across two blue subpixels 104B aligned in the Y direction and two red subpixels 104R aligned in the Y direction to block light incident on these subpixels 104. The light shield 300b blocks light incident on two red subpixels 104R aligned in the Y direction. The light shield 300c blocks light incident on two green subpixels 104G aligned in the Y direction. The light shield 300d extends across two green subpixels 104G aligned in the Y direction and two blue subpixels 104B aligned in the Y direction to block light incident on these subpixels 104.

[0080] As shown in FIG. 24, if the area over which the light shield 300a shields the two blue subpixels 104B aligned in the Y direction is S5, the area over which the light shield 300a shields the two red subpixels 104R aligned in the Y direction is S6, the area over which the light shield 300b shields the two red subpixels 104R aligned in the Y direction is S7, the area over which the light shield 300c shields the two green subpixels 104G aligned in the Y direction is S8, the area over which the light shield 300d shields the two green subpixels 104G aligned in the Y direction is S9, and the area over which the light shield 300d shields the two blue subpixels 104B aligned in the Y direction is S10, the light shields 300a to 300d are arranged such that S5+S10=S6+S7=S8+S9. Therefore, the area (S5+S10) over which the set 302A of light shields the blue subpixel 104B (four blue subpixels 104B), the area (S6+S7) over which the set 302A of light shields the red subpixel 104R (two red subpixels 104R), and the area (S8+S9) over which the set 302A of light shields the green subpixel 104G are equal. That is, similar to the first embodiment, the set 302A of light shields 300 of this embodiment also uniformly shields the subpixels 104 that are consecutively arranged in the X direction for each color. Therefore, in this embodiment as well, the liquid crystal display device 10 can suppress color moiré.

[0081] Furthermore, in one second main pixel 202, twelve light shielding bodies 300 (FIG. 23) located within the second main pixel 202 are arranged in a set of twelve to uniformly shield the sub-pixels 104 for each color. Therefore, the liquid crystal display device 10 of this embodiment can further suppress color moiré, similar to the liquid crystal display device 10 of embodiment 1.

[0082] As described above, the sets 302A of the light shields 300 are arranged in a staggered manner for each set 302A, and the sub-pixels 104 arranged continuously in the X direction are evenly shaded for each color by the sets 302A of the light shields 300, so that the liquid crystal display device 10 of this embodiment can suppress color moiré. Furthermore, the twelve light shields 300 located within the second main pixel 202, as a set of twelve, evenly shade the sub-pixels 104 for each color, so that the liquid crystal display device 10 of this embodiment can further suppress color moiré. Furthermore, since a pixel electrode 250 is provided for each region 202A, the liquid crystal display device 10 of this embodiment can suppress the occurrence of dark spots that are easily visible to the viewer.

[0083] <Embodiment 3> In the second embodiment, the second main pixel 202 is divided into 12 regions 202A of 4 rows and 3 columns in the X and Y directions. The second main pixel 202 may be divided into 16 regions 202A of 4 rows and 4 columns in the X and Y directions. The liquid crystal display device 10 of this embodiment includes a panel unit 50, a backlight 400, and a display control unit 500, similar to the liquid crystal display device 10 of the first embodiment. The configurations of the switching elements 240 (light shields 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 of this embodiment are similar to those of the first embodiment. Here, the arrangement of the light shields 300 and the overlap between the light shields 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described.

[0084] In this embodiment, one second main pixel 202 corresponds to 16 first main pixels 102 arranged in 4 rows and 4 columns in the X and Y directions, as in the first embodiment. The second main pixel 202 in this embodiment is divided into 16 regions 202A arranged in 4 rows and 4 columns in the X and Y directions, as shown in Figures 25 and 26. Each region 202A corresponds to three sub-pixels 104 (one first main pixel 102) arranged in the X direction.

[0085] Furthermore, four adjacent regions 202A arranged in two rows and two columns in the X and Y directions form one set 204A. Four light blocking bodies 300 are located within the set 204A of the region 202A. In the sets 204A adjacent to each other in the X direction, the positions of the sets 204A are shifted in the Y direction by one region 202A.

[0086] As in the second embodiment, four light shields 300 located in the set 204A of the region 202A form one set 302A. The four light shields 300 forming the set 302A of the light shields 300 are arranged in a line in the X direction and are arranged close to each other. The light shields 300 forming the set 302A of the light shields 300 correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the four regions 202A forming the set 204A of the region 202A. As shown in FIG. 25, it is preferable that the set 302A of the light shields 300 is arranged in the X direction at intervals four times the width of the region 202A in the X direction and arranged in the Y direction at intervals twice the width of the region 202A in the Y direction. In a set 204A of regions 202A adjacent in the X direction, the position of the set 204A is shifted in the Y direction by one region 202A, so that the light shields 300 are arranged in a staggered arrangement shifted by half a pitch in the X and Y directions in units of 302A.

[0087] 25 and 26, the set 302A of light shields 300 overlaps with eight subpixels 104 arranged in two rows and four columns in the X and Y directions, and blocks light incident on these subpixels 104. In the example shown in Fig. 25 and 26, the set 302A of light shields 300 overlaps, in order from the -X side, two green subpixels 104G, two blue subpixels 104B, two red subpixels 104R, and two green subpixels 104G. The set 302A of light shields 300 blocks light emitted from the backlight 400 and incident on these subpixels 104.

[0088] As in the second embodiment, the area over which the set 302A of light shields the green subpixel 104G (four green subpixels 104G), the area over which the set 302A of light shields the blue subpixel 104B (two blue subpixels 104B), and the area over which the set 302A of light shields the red subpixel 104R (two red subpixels 104R) are equal. That is, as in the second embodiment, the set 302A of light shields 300 of this embodiment also uniformly shields the subpixels 104 that are consecutively arranged in the X direction for each color. Furthermore, in one second main pixel 202, one set of light shields 300 ( FIG. 26 ) located within the second main pixel 202 uniformly shields the subpixels 104 for each color.

[0089] As described above, in this embodiment as well, the sets 302A of the light shields 300 are arranged in a staggered manner for each set 302A, and the sub-pixels 104 that are continuously arranged in the X direction are evenly shaded for each color by the sets 302A of the light shields 300. Therefore, the liquid crystal display device 10 can suppress color moiré. Moreover, since one set of the light shields 300 located within the second main pixel 202 evenly shades the sub-pixels 104 for each color, the liquid crystal display device 10 of this embodiment can further suppress color moiré. Furthermore, since a pixel electrode 250 is provided for each region 202A, the liquid crystal display device 10 of this embodiment can suppress the occurrence of dark spots that are easily visible to the viewer.

[0090] <Embodiment 4> In the first to third embodiments, the light shield 300 is formed from the switching element 240. The set 204A in the first embodiment is formed from two regions 202A, and the set 204A in the second and third embodiments is formed from four regions 202A. The light shield 300 may be formed from a dummy light shielding layer. The set of regions 202A may be a set formed from four regions 202A and a set formed from two regions 202A. Hereinafter, the light shield formed from the dummy light shielding layer will be referred to as a light shield 310.

[0091] The liquid crystal display device 10 of this embodiment includes a panel unit 50, a backlight 400, and a display control unit 500, similar to the liquid crystal display device 10 of embodiment 1. The configurations of the switching elements 240 (light shields 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 of this embodiment are similar to those of embodiment 1. Here, the arrangement of the dummy light shielding layer DM and the light shielding bodies 300 and 310, and the overlap between the light shielding bodies 300 and 310 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described.

[0092] First, the dummy light-shielding layer DM and the light-shielding body 310 formed from the dummy light-shielding layer DM will be described. The dummy light-shielding layer DM is formed from a metal having light-shielding properties, an organic material having light-shielding properties, etc. The dummy light-shielding layer DM is formed on the main surface 210a of the second TFT substrate 210, for example, as shown in FIG.

[0093] When viewed from the observer side in plan view, the dummy light-shielding layer DM functions as a light-shielding body that blocks light emitted from the backlight 400 and incident on the sub-pixels 104 of the first liquid crystal display panel. The light-shielding body 310 formed from the dummy light-shielding layer DM has the same outer shape as the light-shielding body 300, as shown in FIG.

[0094] Next, the arrangement of the light shields 300 and 310 and the overlap between the light shields 300 and 310 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described.

[0095] In this embodiment, one second main pixel 202 corresponds to 16 first main pixels 102 arranged in 4 rows and 4 columns in the X and Y directions, as in embodiment 1. The second main pixel 202 in this embodiment is divided into 12 regions 202A arranged in 4 rows and 3 columns in the X and Y directions, as shown in Figures 29 and 30. Each of the regions 202A corresponds to four sub-pixels 104 arranged in the X direction.

[0096] In this embodiment, four adjacent regions 202A arranged in two rows and two columns in the X and Y directions form one set 204A. Four light blocking bodies 300 are located within the set 204A of the regions 202A.

[0097] Furthermore, two regions 202A adjacent to each other in the Y direction form one set 204B. Two light shields 300 and two light shields 310 are located within the set 204B of the region 202A.

[0098] The sets 204A of the region 202A and the sets 204B of the region 202A are arranged in the Y direction, and the rows in the Y direction of the sets 204A and the rows in the Y direction of the sets 204B are arranged alternately in the X direction. In the rows in the Y direction of the sets 204A and the rows in the Y direction of the sets 204B, the positions of the sets 204A of the region 202A and the sets 204B of the region 202A are shifted in the Y direction by one region 202A. The set 204A of the region 202A corresponds to the first set, and the set 204B of the region 202A corresponds to the second set. The rows in the Y direction of the sets 204A of the region 202A correspond to the first row, and the rows in the Y direction of the sets 204B of the region 202A correspond to the second row.

[0099] Four light shields 300 located within the set 204A of the region 202A form one set 302A. The four light shields 300 forming the set 302A of the light shields 300 are aligned in a line in the X direction and arranged closely to each other. The light shields 300 forming the set 302A correspond to the switching elements 240 that connect to the pixel electrodes 250 arranged in each of the four regions 202A that form the set 204A of the region 202A.

[0100] Two light shields 300 and two light shields 310 located in the set 204B of the region 202A form one set 302B. The two light shields 300 and two light shields 310 forming the set 302B of the light shields 300, 310 are aligned in a line in the X direction and arranged close to each other. The light shields 300 forming the set 302B correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the two regions 202A forming the set 204B of the region 202A. The light shields 310 forming the set 302B are light shields formed from a dummy light shielding layer DM.

[0101] 29, it is preferable that the sets 302A of the light shields 300 are arranged in the X direction at intervals three times the width of the regions 202A in the X direction, and arranged in the Y direction at intervals twice the width of the regions 202A in the Y direction. In the Y direction row of the sets 204A and the Y direction row of the sets 204B, the positions of the sets 204A and 204B are shifted in the Y direction by one region 202A. Therefore, the arrangement of the sets of light shields (sets 302A and 302B) is a staggered arrangement shifted by a half pitch in the X and Y directions.

[0102] 29 and 30 , the set 302A of light shields 300 overlaps with eight subpixels 104 arranged in two rows and four columns in the X and Y directions, and blocks light incident on these subpixels 104. The set 302A of light shields 300 overlaps, in order from the -X side, two green subpixels 104G, two blue subpixels 104B, two red subpixels 104R, and two green subpixels 104G. The set 302A of light shields 300 blocks light emitted from the backlight 400 and incident on these subpixels 104.

[0103] The set 302B of light shields 300, 310 also overlaps with eight subpixels 104 arranged in two rows and four columns in the X and Y directions, and blocks light incident on these subpixels 104. The set 302B of light shields 300, 310 also overlaps with, in order from the -X side, two green subpixels 104G, two blue subpixels 104B, two red subpixels 104R, and two green subpixels 104G. The set 302B of light shields 300 blocks light emitted from the backlight 400 and incident on these subpixels 104.

[0104] As in the second embodiment, the area where the pair of light shields (the pair 302A and the pair 302B) shield the green subpixel 104G (four green subpixels 104G), the area where the pair of light shields shield the blue subpixel 104B (two blue subpixels 104B), and the area where the pair of light shields shield the red subpixel 104R (two red subpixels 104R) are equal. That is, as in the second embodiment, the pair 302A of light shields 300 and the pair 302B of light shields 300, 310 uniformly shield the subpixels 104 that are consecutively arranged in the X direction from light for each color. Furthermore, in one second main pixel 202, the pair of light shields 300, 310 ( FIG. 30 ) located within the second main pixel 202 uniformly shield the subpixels 104 from light for each color.

[0105] As described above, in this embodiment as well, the pairs of light shields (the pair 302A and the pair 302B) are arranged in a staggered manner, and the sub-pixels 104 arranged continuously in the X direction are evenly shielded for each color by the pair 302A of the light shields 300 and the pair 302B of the light shields 300 and 310. Therefore, the liquid crystal display device 10 can suppress color moiré. Furthermore, since the pair of light shields 300 and 310 located within the second main pixel 202 evenly shields the sub-pixels 104 for each color, the liquid crystal display device 10 of this embodiment can further suppress color moiré. Furthermore, since the pixel electrode 250 is provided for each region 202A, the liquid crystal display device 10 of this embodiment can suppress the occurrence of dark spots that are easily visible to the viewer.

[0106] <Embodiment 5> In the first to fourth embodiments, the light shields 300, 310 forming a pair are disposed close to each other, and the light shields 300, 310 are disposed in a staggered arrangement in pairs. Furthermore, a pair 302A of the light shields 300 and a pair 302B of the light shields 300, 310 uniformly shield the sub-pixels 104 arranged consecutively in the X direction for each color.

[0107] The light shields 300, 310 may be arranged in a staggered arrangement, one each. Alternatively, a pair of light shields 300, 310 may uniformly shield each of the subpixels 104 of the same color that are consecutively arranged (a row of red subpixels 104R, a row of green subpixels 104G, and a row of blue subpixels 104B) from light.

[0108] The liquid crystal display device 10 of this embodiment includes a panel unit 50, a backlight 400, and a display control unit 500, similar to the liquid crystal display device 10 of embodiment 1. The configurations of the switching elements 240 (light shields 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 of this embodiment are similar to those of embodiment 1. Here, the arrangement of the light shields 300 and the overlap between the light shields 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described.

[0109] In this embodiment, one second main pixel 202 corresponds to 16 first main pixels 102 arranged in 4 rows and 4 columns in the X and Y directions, as in the first embodiment. The second main pixel 202 in this embodiment is divided into four regions 202A arranged in 2 rows and 2 columns in the X and Y directions, as shown in Fig. 31. Each of the regions 202A corresponds to four first main pixels 102 arranged in 2 rows and 2 columns in the X and Y directions.

[0110] In this embodiment, two regions 202A adjacent to each other in the Y direction form one set 204A. The set 204A of the regions 202A is arranged in a matrix in the X and Y directions. Two light shields 300 are located in the set 204A of the regions 202A. The light shields 300 correspond to switching elements 240 that connect to pixel electrodes 250 arranged in each of the two regions 202A that form the set 204A of the regions 202A.

[0111] Two light blocking bodies 300 in a set 204A of regions 202A are arranged in each of the two regions 202A with a shift in the X direction. Therefore, the light blocking bodies 300 are arranged in a staggered manner, one by one.

[0112] Two light shields 300 in the set 204A of the region 202A form one set 302A. The set 302A of the light shields 300, as one set, uniformly shields each of the subpixels 104 of the same color that are consecutively arranged in a row SL from light for each color. Specifically, the set 302A of the light shields 300 overlaps each of the subpixels 104 of the row SL of the red subpixels 104R, the row SL of the green subpixels 104G, the row SL of the blue subpixels 104B, and the row SL of the red subpixels 104R that are consecutively arranged from the -X side, and blocks light from the backlight that is incident on these subpixels 104.

[0113] The area over which the set 302A of light shields 300 shields the two red subpixels 104R, the area over which the set 302A of light shields 300 shields the green subpixel 104G, and the area over which the set 302A of light shields 300 shields the blue subpixel 104B are equal. Therefore, for each set 204A in which regions 202A are aligned in the Y direction, the subpixels 104 of a specific color are not periodically shielded. Because the subpixels 104 of a specific color are not periodically shielded, the liquid crystal display device 10 can suppress color moiré.

[0114] Furthermore, in one second main pixel 202, a set of four light shields 300 located within the second main pixel 202 uniformly shield the sub-pixels 104 for each color. Therefore, the liquid crystal display device 10 can further suppress color moiré.

[0115] Specifically, as shown in Fig. 32, the change in the light blocking rate SH of this embodiment with respect to the viewing angle θ is small. Therefore, even if there is a misalignment between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or if the display of the liquid crystal display device 10 is viewed from an oblique direction, the four light blocking bodies 300 can block light from the different color sub-pixels 104 almost evenly for each color, and the liquid crystal display device 10 can suppress color moiré.

[0116] As described above, the liquid crystal display device 10 of this embodiment can also suppress color moiré. Furthermore, since the pixel electrode 250 is provided for each region 202A, the liquid crystal display device 10 of this embodiment can suppress the occurrence of dark spots that are easily visible to the viewer.

[0117] <Embodiment 6> In the fifth embodiment, a set 302A of light shields 300 together uniformly shields the sub-pixels 104 of each color in a row SL of consecutively arranged sub-pixels 104 of the same color. Each set of light shields 300 arranged in a staggered pattern may uniformly shield the sub-pixels 104 of each color.

[0118] The liquid crystal display device 10 of this embodiment includes a panel unit 50, a backlight 400, and a display control unit 500, similar to the liquid crystal display device 10 of embodiment 1. The configurations of the switching elements 240 (light shields 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 of this embodiment are similar to those of embodiment 1. Here, the arrangement of the light shields 300 and the overlap between the light shields 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described.

[0119] In this embodiment, one second main pixel 202 corresponds to 24 first main pixels 102 arranged in 6 rows and 4 columns in the X and Y directions, as shown in Fig. 33. Moreover, the second main pixel 202 in this embodiment is divided into six regions 202A arranged in 2 rows and 3 columns in the X and Y directions. Each of the regions 202A corresponds to 12 sub-pixels 104 arranged in 3 rows and 4 columns in the X and Y directions.

[0120] In this embodiment, three regions 202A adjacent to each other in the X direction form one set 204A. The set 204A of the regions 202A is arranged in a matrix in the X and Y directions. Three light shields 300 are positioned in the set 204A of the region 202A, and the three light shields 300 form one set 302. The three light shields 300 correspond to switching elements 240 that connect to pixel electrodes 250 arranged in each of the three regions 202A that form the set 204A of the region 202A.

[0121] In this embodiment, the light shields 300 are arranged in a staggered pattern, and in a region 202A (hereinafter referred to as region 202A1) located on the -X side of the set 204A, the light shields 300 overlap the red sub-pixel 104R and the green sub-pixel 104G located on the -X side of the first row. In a region 202A (hereinafter referred to as region 202A2) located in the center of the set 204A, the light shields 300 overlap the green sub-pixel 104G and the blue sub-pixel 104B located on the -X side of the second row. Furthermore, in a region 202A (hereinafter referred to as region 202A3) located on the +X side of the set 204A, the light shields 300 overlap the blue sub-pixel 104B and the red sub-pixel 104R located on the -X side of the third row.

[0122] In this embodiment, the set 302A of the light shielding bodies 300, as a single set, uniformly shields light for each color from incident on the sub-pixels 104 corresponding to the set 204A of the region 202A. Specifically, the sum of the area where the light shielding body 300 located in the region 202A1 shields the red sub-pixel 104R and the area where the light shielding body 300 located in the region 202A3 shields the red sub-pixel 104R, the sum of the area where the light shielding body 300 located in the region 202A1 shields the green sub-pixel 104G and the area where the light shielding body 300 located in the region 202A2 shields the green sub-pixel 104G, and the sum of the area where the light shielding body 300 located in the region 202A2 shields the blue sub-pixel 104B and the area where the light shielding body 300 located in the region 202A3 shields the blue sub-pixel 104B are equal. Therefore, for each set 204A in which the regions 202A are arranged in the X direction, the sub-pixels 104 of a specific color are not periodically shaded. Because the sub-pixels 104 of a specific color are not periodically shaded, the liquid crystal display device 10 can suppress color moiré.

[0123] Furthermore, in this embodiment as well, the six light shields 300 located within the second main pixel 202 form a set of six and uniformly shield the sub-pixels 104 for each color. Therefore, the liquid crystal display device 10 can further suppress color moiré.

[0124] As described above, the liquid crystal display device 10 of this embodiment can also suppress color moiré. Furthermore, since the pixel electrode 250 is provided for each region 202A, the liquid crystal display device 10 of this embodiment can suppress the occurrence of dark spots that are easily visible to the viewer.

[0125] <Embodiment 7> In the first embodiment, the scanning lines GL of the second liquid crystal display panel 200 extend linearly in the X direction, and the signal lines DL of the second liquid crystal display panel 200 extend linearly in the Y direction. The scanning lines GL and the signal lines DL of the second liquid crystal display panel 200 may be bent. Furthermore, the scanning lines GL and the signal lines DL of the second liquid crystal display panel 200 may form a light-shielding pattern.

[0126] The liquid crystal display device 10 of this embodiment includes a panel unit 50, a backlight 400, and a display control unit 500, similar to the liquid crystal display device 10 of embodiment 1. The configurations of the switching elements 240 (light shields 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 of this embodiment are the same as those of embodiment 1. The arrangement of the light shields 300 and the overlapping between the light shields 300 and the sub-pixels 104 of the first liquid crystal display panel 100 are also the same as those of embodiment 1. Here, the overlapping between the scanning lines GL and signal lines DL of the second liquid crystal display panel 200, and the scanning lines GL and signal lines DL (light shielding patterns) and the first main pixels 102 (sub-pixels 104) of the first liquid crystal display panel 100 will be described.

[0127] First, the scanning lines GL will be described. The scanning lines GL have light-shielding properties and are made of metal (aluminum (Al), molybdenum (Mo), etc.). As shown in Figs. 34 and 35, the scanning lines GL extend in the X direction and are arranged in the Y direction. A pair of adjacent scanning lines GL extend in the X direction and form a first light-shielding pattern 260 having light-shielding properties. The first light-shielding patterns 260 are repeatedly arranged in the Y direction and block light emitted from the backlight 400 and incident on the first main pixel 102 (sub-pixel 104). In Fig. 34, for ease of understanding, the scanning lines GL are shown by solid lines and the signal lines DL are shown by dashed lines.

[0128] One of a pair of adjacent scanning lines GL (hereinafter, also referred to as a first light-shielding line 262) has a first inclined portion 262a, a second inclined portion 262b, and a first flat portion 262c, as shown in Fig. 35. The first inclined portion 262a is inclined at an acute angle in the clockwise direction with respect to the +X direction, and the second inclined portion 262b is inclined at an acute angle in the opposite direction (counterclockwise direction) to the first inclined portion 262a with respect to the +X direction. The first flat portion 262c extends parallel to the X direction and connects the first inclined portion 262a and the second inclined portion 262b.

[0129] The other scanning line GL (hereinafter, also referred to as the second light shielding line 264) of the pair of adjacent scanning lines GL is symmetrical to one scanning line GL (the first light shielding line 262) with respect to the X direction, and has a third inclined portion 264a, a fourth inclined portion 264b, and a second flat portion 264c. The third inclined portion 264a faces the first inclined portion 262a of the first light shielding line 262, and is inclined at an acute angle in the counterclockwise direction with respect to the +X direction. The fourth inclined portion 264b faces the second inclined portion 262b of the first light shielding line 262, and is inclined at an acute angle in the opposite direction (clockwise direction) to the third inclined portion 264a with respect to the +X direction. The second flat portion 264c extends parallel to the X direction, faces the first flat portion 262c of the first light shielding line 262, and connects the third inclined portion 264a and the fourth inclined portion 264b.

[0130] The first light-shielding line 262 has a first inclined portion 262a inclined at an acute angle clockwise with respect to the +X direction and a second inclined portion 262b inclined at an acute angle in the opposite direction to the first inclined portion 262a with respect to the +X direction, and the first light-shielding line 262 and the second light-shielding line 264 adjacent to the first light-shielding line 262 are in a line-symmetrical relationship with respect to the X direction. Therefore, as shown in Fig. 35, the interval between the first light-shielding line 262 and the second light-shielding line 264 changes continuously between the first inclined portion 262a of the first light-shielding line 262 and the third inclined portion 264a of the second light-shielding line 264 (interval L1), and also changes continuously between the second inclined portion 262b of the first light-shielding line 262 and the fourth inclined portion 264b of the second light-shielding line 264 (interval L2). Furthermore, the intervals (intervals L3 and L4) between the first flat portions 262c of the first light-shielding lines 262 and the second flat portions 264c of the second light-shielding lines 264 also change. As a result, even if the second liquid crystal display panel 200 and the first liquid crystal display panel 100 are overlapped, interference of spatial frequencies in the second liquid crystal display panel 200 and the first liquid crystal display panel 100 is suppressed, and moire in the liquid crystal display device 10 can be suppressed. Note that the period of the first light-shielding patterns 260 is preferably a natural number multiple of the width of the first main pixel 102 in the X direction.

[0131] Next, the signal lines DL will be described. Like the scanning lines GL, the signal lines DL have light-shielding properties and are made of metal (aluminum (Al), molybdenum (Mo), etc.). As shown in Figs. 34 and 35, the signal lines DL extend in the Y direction and are arranged in the X direction. In addition, a pair of adjacent signal lines DL extend in the Y direction and form a second light-shielding pattern 270 having light-shielding properties. The second light-shielding patterns 270 are repeatedly arranged in the X direction and block light emitted from the backlight 400 and entering the first main pixel 102 (sub-pixel 104).

[0132] One signal wiring DL (hereinafter also referred to as the third light-shielding line 272) of a pair of adjacent signal wirings DL has a fifth inclined portion 272a and a sixth inclined portion 272b, as shown in Fig. 35. The fifth inclined portion 272a is inclined at an acute angle in the counterclockwise direction with respect to the +Y direction. The sixth inclined portion 272b is inclined at an acute angle in the opposite direction (clockwise direction) to the fifth inclined portion 272a with respect to the +Y direction.

[0133] The other signal wiring DL (hereinafter also referred to as the fourth light-shielding line 274) of a pair of adjacent signal wirings DL is symmetrical to one signal wiring DL (the third light-shielding line 272) with respect to the Y direction, and has a seventh inclined portion 274a and an eighth inclined portion 274b. The seventh inclined portion 274a faces the fifth inclined portion 272a of the third light-shielding line 272, and is inclined at an acute angle in the clockwise direction with respect to the +Y direction. The eighth inclined portion 274b faces the sixth inclined portion 272b of the third light-shielding line 272, and is inclined at an acute angle in the opposite direction (counterclockwise direction) to the seventh inclined portion 274a with respect to the +Y direction. The third shading line 272 and the fourth shading line 274 of the second shading pattern 270 correspond to the first shading line and the second shading line of the shading pattern, respectively, and the fifth inclined portion 272a and the sixth inclined portion 272b of the third shading line 272 correspond to the first inclined portion and the second inclined portion of the first shading line, respectively.

[0134] The third light-shielding line 272 has a fifth inclined portion 272a inclined at an acute angle in the counterclockwise direction with respect to the +Y direction, and a sixth inclined portion 272b inclined at an acute angle in the opposite direction to the fifth inclined portion 272a with respect to the +Y direction, and the third light-shielding line 272 and the fourth light-shielding line 274 adjacent to the third light-shielding line 272 are in a line-symmetrical relationship with respect to the Y direction. Therefore, as shown in FIG. 35, the interval L5 between the third light-shielding line 272 and the fourth light-shielding line 274 changes continuously. This makes it possible to suppress interference of spatial frequencies in the second liquid crystal display panel 200 and the first liquid crystal display panel 100 even when the second liquid crystal display panel 200 and the first liquid crystal display panel 100 are overlapped, and to suppress moire in the liquid crystal display device 10. It is preferable that the period of the second light-shielding pattern 270 is a natural number times the width of the sub-pixel 104 in the Y direction.

[0135] The overlap between the first light-shielding pattern 260 and the second light-shielding pattern 270 and the first main pixel 102 (sub-pixel 104) of the first liquid crystal display panel 100 will be described. In the first light-shielding pattern 260 extending in the X-direction, as shown in Fig. 34, the first inclined portion 262a and the second inclined portion 262b of the first light-shielding line 262 and the third inclined portion 264a and the fourth inclined portion 264b of the second light-shielding line 264 are inclined across a plurality of sub-pixels 104 of different colors (red sub-pixel 104R, blue sub-pixel 104B) of the first liquid crystal display panel 100. As a result, the luminance of the sub-pixels 104 overlapping with the first light-shielding pattern 260 is slightly reduced, and the first main pixel 102 having the sub-pixel 104 overlapping with the first light-shielding pattern 260 exhibits a color slightly different from the color to be displayed. However, since the sub-pixels 104 that experience the same degree of luminance reduction are located close to each other, the luminance of the sub-pixels 104 is averaged to the observer of the liquid crystal display device 10, and the observer perceives the luminance of the multiple sub-pixels 104 with reduced luminance as the same luminance gradation. Therefore, for the entire display of the liquid crystal display device 10, the observer can be prevented from perceiving color moiré.

[0136] In the second light-shielding pattern 270 extending in the Y direction, the fifth inclined portion 272a and the sixth inclined portion 272b of the third light-shielding line 272 and the seventh inclined portion 274a and the eighth inclined portion 274b of the fourth light-shielding line 274 are inclined across a plurality of sub-pixels 104 of different colors (red sub-pixel 104R, blue sub-pixel 104B) of the first liquid crystal display panel 100. As a result, similar to the first light-shielding pattern 260, the first main pixel 102 having the sub-pixel 104 overlapping with the second light-shielding pattern 270 exhibits a color slightly different from the color to be displayed. However, the color exhibited by the first main pixel 102 having a sub-pixel 104 overlapping with the second light-shielding pattern 270 and the color exhibited by the first main pixel 102 located in the vicinity of the first main pixel 102 having a sub-pixel 104 overlapping with the second light-shielding pattern 270 are perceived as different colors by the viewer, and the saturation of the combined color is also reduced, so that the viewer's perception of color moiré can be suppressed for the entire display of the liquid crystal display device 10.

[0137] As described above, the first light-shielding pattern (scanning line GL) of the second liquid crystal display panel 200 is formed of the first light-shielding line 262 having the first inclined portion 262a inclined with respect to the +X direction, the second inclined portion 262b inclined in the opposite direction to the first inclined portion 262a with respect to the +X direction, and the first flat portion 262c connecting the first inclined portion 262a and the second inclined portion 262b, and the second light-shielding line 264 that is line-symmetrical with the first light-shielding line 262 with respect to the X direction, so that it is possible to suppress interference of spatial frequencies in the first liquid crystal display panel 100 and the second liquid crystal display panel 200 and to suppress moire in the liquid crystal display device 10. Furthermore, it is possible to suppress the occurrence of color moire.

[0138] Furthermore, since the second light-shielding pattern (signal wiring DL) of the second liquid crystal display panel 200 is formed of the third light-shielding line 272 having the fifth inclined portion 272a inclined at an acute angle with respect to the +Y direction and the sixth inclined portion 272b inclined at an acute angle in the opposite direction to the fifth inclined portion 272a with respect to the +Y direction, and the fourth light-shielding line 274 which is line-symmetrical to the third light-shielding line 272 with respect to the Y direction, it is possible to suppress interference of spatial frequencies in the first liquid crystal display panel 100 and the second liquid crystal display panel 200 and to suppress moire in the liquid crystal display device 10. The occurrence of color moire can also be suppressed.

[0139] In this embodiment, similarly to the first embodiment, the sets 302A of the light shields 300 are arranged in a staggered manner for each set 302A, and the sub-pixels 104 that are consecutively arranged in the X direction are evenly shaded for each color by the sets 302A of the light shields 300. Therefore, the liquid crystal display device 10 can suppress color moiré. Furthermore, the four light shields 300 located within the second main pixel 202, as a set of four, evenly shade the sub-pixels 104 for each color, so that the liquid crystal display device 10 can further suppress color moiré.

[0140] <Embodiment 8> A set of multiple light shields 300 located within the second main pixel 202 may uniformly shield the sub-pixels 104 for each color. The liquid crystal display device 10 of this embodiment is similar to the liquid crystal display device 10 of embodiment 2, except for the overlap between the light shields 300 and the sub-pixels 104 of the first liquid crystal display panel 100. Here, the overlap between the light shields 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described.

[0141] In this embodiment, as shown in Figures 36 and 37, the set 302A of light shields 300 is arranged in a staggered manner and overlaps with eight subpixels 104 of two rows and four columns in the X and Y directions. Specifically, the set 302A of light shields 300 overlaps, in order from the -X side, two blue subpixels 104B, two red subpixels 104R, two green subpixels 104G, and two blue subpixels 104B. The set 302A of light shields 300 block light emitted from the backlight 400 and incident on these subpixels 104.

[0142] The light shield 300a extends across two blue subpixels 104B aligned in the Y direction to block light incident on these subpixels 104. The light shield 300b blocks light incident on two red subpixels 104R aligned in the Y direction. The light shield 300c blocks light incident on two green subpixels 104G aligned in the Y direction. The light shield 300d extends across two blue subpixels 104B aligned in the Y direction to block light incident on these subpixels 104. Thus, the set 302A of light shields 300 in this embodiment does not uniformly block the subpixels 104 aligned consecutively in the X direction for each color.

[0143] On the other hand, the twelve light shielding bodies 300 (FIG. 37) located within the second main pixel 202, in a set of twelve, uniformly shield the sub-pixels 104 of each color from light. As a result, even if there is a misalignment between the second liquid crystal display panel 200 and the first liquid crystal display panel 100 or when the display of the liquid crystal display device 10 is viewed from an oblique direction, the twelve light shielding bodies 300, in a set of twelve, can uniformly shield the different colored sub-pixels 104 of each color from light.

[0144] 38, the change in the light blocking rate SH of this embodiment with respect to the viewing angle θ is small for any color of sub-pixel 104. Therefore, even if there is a misalignment between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or if the display of the liquid crystal display device 10 is viewed from an oblique direction, the twelve light blocking bodies 300 can block light from the different colored sub-pixels 104 almost evenly for each color, and the liquid crystal display device 10 can suppress color moiré.

[0145] As described above, the twelve light shielding bodies 300 located in the second main pixel 202, in a set of twelve, uniformly shield the sub-pixels 104 by color, so that the liquid crystal display device 10 of this embodiment can suppress color moiré. Furthermore, since the pixel electrode 250 is provided for each region 202A, the liquid crystal display device 10 of this embodiment can suppress the occurrence of dark spots that are easily visible to the viewer.

[0146] <Modification> Although the embodiments have been described above, the present disclosure can be modified in various ways without departing from the spirit and scope of the present disclosure.

[0147] In this embodiment, the first liquid crystal display panel 100 and the second liquid crystal display panel 200 operate in a lateral electric field mode. The operation mode of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 is arbitrary.

[0148] In the embodiment, the first polarizer 132 of the first liquid crystal display panel 100 also serves as a polarizer on the light exit side of the second liquid crystal display panel 200. The second liquid crystal display panel 200 may include a polarizer on the main surface 220b of the second opposing substrate 220.

[0149] In the embodiment, the sub-pixels 104 of the first liquid crystal display panel 100 have a rectangular shape. The shape of the sub-pixels 104 is arbitrary. The sub-pixels 104 may have a V-shape. For example, when the sub-pixels 104 have a multi-domain structure, the sub-pixels 104 may have a V-shape.

[0150] Furthermore, when the pixel electrode of the sub-pixel 104 is inclined with respect to the Y direction, the comb teeth of the pixel electrode 250 of the second liquid crystal display panel 200 may be inclined with respect to the Y direction in accordance with the inclination of the pixel electrode of the sub-pixel 104.

[0151] The switching element 240 of the second liquid crystal display panel 200 may have a U-shaped source electrode 246 as shown in Fig. 39. In this case, the light blocking body 300 formed from the switching element 240 has an outer shape shown in Fig. 40.

[0152] The switching element 240 of the second liquid crystal display panel 200 may have a light-shielding film that blocks external light or light incident from a backlight. When the switching element 240 has a light-shielding film, the outer shape of the light-shielding body 300 formed from the switching element 240 is determined including the light-shielding film. In this specification, the outer shapes of the light-shielding bodies 300, 310 are determined by the configuration of the switching element 240.

[0153] In the first embodiment, one light blocking body 300 overlaps two color subpixels 104 and blocks light incident on the two color subpixels 104. In other embodiments, one light blocking body 300 or 310 overlaps one or two color subpixels 104 and blocks light incident on the one or two color subpixels 104. One light blocking body 300, 310 may overlap three color subpixels 104 and block light incident on the three color subpixels 104.

[0154] In the fourth embodiment, the dummy light-shielding layer DM is formed on the main surface 210a of the second TFT substrate 210. The dummy light-shielding layer DM may be formed at any position. The dummy light-shielding layer DM may be formed on the second opposing substrate 220.

[0155] In the fourth embodiment, the light shields 300 and 310 of the set 302B are arranged in the order of light shield 300, light shield 310, light shield 310, and light shield 300 in the X direction (i.e., two light shields 300 sandwich two light shields 310). In the set 302B, the light shields 300 and 310 may be arranged in the order of light shield 300, light shield 300, light shield 310, and light shield 310 in the X direction. Furthermore, the set 302B in which the light shield 300, light shield 310, light shield 310, and light shield 300 are arranged in this order and the set 302 in which the light shield 300, light shield 300, light shield 310, and light shield 310 are arranged in this order may be alternately arranged in the Y direction.

[0156] In the first to fourth, sixth and seventh embodiments, two or four light shields 300, 310 forming the sets 302A, 302B are aligned in a row in the X direction. The arrangement of the light shields 300, 310 is not limited to one row. For example, the four light shields 300 forming the set 302A may be arranged in two rows and two columns as shown in FIG. 41. Furthermore, the positions of the light shields 300 in the first and second rows may be shifted from each other as shown in FIG. 42.

[0157] The number of first main pixels 102 of the first liquid crystal display panel 100 to which one second main pixel 202 of the second liquid crystal display panel 200 corresponds is arbitrary. In addition, the number of divisions into which one second main pixel 202 of the second liquid crystal display panel 200 is divided into a plurality of regions 202A is also arbitrary. From the viewpoints of resolution, wiring complexity, suppression of occurrence of dark spots, etc., the size of the second main pixel 202 is preferably about 500 μm×500 μm, and the size of the region 202A is preferably 250 μm×250 μm or less. In addition, the number of divisions of the second main pixel 202 is preferably 4 to 16.

[0158] In the embodiment, the second main pixel 202 of the second liquid crystal display panel 200 has a rectangular shape. The shape of the second main pixel 202 is arbitrary. For example, the shape of the second main pixel 202 may be non-rectangular as shown in Fig. 43. In this case, by assuming a virtual region 202S having a rectangular shape, the light shield 300 can be arranged in the same manner as in the embodiment.

[0159] In the fifth embodiment in which the light shields 300 are arranged in a staggered manner, the second main pixel 202 of the second liquid crystal display panel 200 is divided into four regions 202A of two rows and two columns in the X and Y directions. Even when the light shields 300 are arranged in a staggered manner, the number of divisions of the second main pixel 202 is arbitrary. For example, as shown in FIG. 44, the second main pixel 202 may be divided into twelve regions 202A of four rows and three columns in the X and Y directions. In this case, too, one set 302A of the light shields 300 uniformly shields the respective sub-pixels 104 of the same color in a column SL of consecutively arranged sub-pixels 104. In this modification, too, as shown in FIG. 45, the change in the light shielding rate SH with respect to the angle θ of the viewing direction is small. Therefore, even if there is a misalignment between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or if the display of the liquid crystal display device 10 is viewed from an oblique direction, the light shielding body 300 of the second main pixel 202 can block the different colored sub-pixels 104 almost evenly for each color, and the liquid crystal display device 10 can suppress color moiré.

[0160] In the seventh embodiment, the second liquid crystal display panel 200 includes a first light-shielding pattern 260 and a second light-shielding pattern 270. It is sufficient that the second liquid crystal display panel 200 includes at least one of the first light-shielding pattern 260 and the second light-shielding pattern 270.

[0161] Furthermore, the first light-shielding lines 262 of the first light-shielding pattern 260 have a first flat portion 262c, and the second light-shielding lines 264 of the first light-shielding pattern 260 have a second flat portion 264c. The first light-shielding lines 262 do not necessarily have the first flat portion 262c, and the second light-shielding lines 264 do not necessarily have the second flat portion 264c. In other words, the first light-shielding lines 262 and the second light-shielding lines 264 are in a line-symmetrical relationship with respect to the X direction, and each may extend in a zigzag pattern in the X direction.

[0162] Meanwhile, the third light-shielding line 272 of the second light-shielding pattern 270 may have a third flat portion that connects the fifth inclined portion 272a and the sixth inclined portion 272b and extends parallel to the Y direction. Also, the fourth light-shielding line 274 of the second light-shielding pattern 270 may have a fourth flat portion that connects the seventh inclined portion 274a and the eighth inclined portion 274b and extends parallel to the Y direction.

[0163] The second liquid crystal display panel 200 of the second to eighth embodiments and the modified examples may include at least one of the first light-shielding pattern 260 and the second light-shielding pattern 270.

[0164] Although the preferred embodiments have been described above, the present disclosure is not limited to such specific embodiments, and the present disclosure includes the invention described in the claims and their equivalents. [Explanation of symbols]

[0165] 10 Liquid crystal display device, 50 Panel section, 100 First liquid crystal display panel, 102 First main pixel, 104 Subpixel, 104R Red subpixel, 104G Green subpixel, 104B Blue subpixel, 110 First TFT substrate, 110a, 110b Main surface, 120 First opposing substrate, 120a, 120b Main surface, 122 Color filter, 130 First liquid crystal, 132 First polarizing plate, 134 Second polarizing plate, 136 First driver circuit, 138 Sealing material, 150 Adhesive layer, 200 Second liquid crystal display panel, 202 Second main pixel, 202A, 202A1, 202A2, 202A3 Area, 202S Virtual area, 204A, 204B Set, 210 Second TFT substrate, 210a, 210b Main surface, 220 Second opposing substrate, 220a, 220b, main surface, 230, second liquid crystal, 232, third polarizing plate, 236, second driver circuit, 238, sealing material, 240, switching element, 242, gate electrode, 244, semiconductor layer, 246, source electrode, 248, drain electrode, 248a, contact portion, 250, pixel electrode, 260, first light-shielding pattern, 262, first light-shielding line, 262a, first inclined portion, 262b, second inclined portion, 262c, first flat portion, 264, second light-shielding line, 264a, third inclined portion, 264b, fourth inclined portion, 264c, second flat portion, 270, second light-shielding pattern, 272, third light-shielding line, 272a, fifth inclined portion, 272b, sixth inclined portion, 274, fourth light-shielding line, 274a, seventh inclined portion, 274b, eighth inclined portion, 282 First insulating layer, 284, second insulating layer, 286, third insulating layer, 300, 300a, 300b, 300c, 300d, 310, light shielding body, 302A, 302B set, 400, backlight, 500, display control unit, 510, image data distribution unit, 520, first image signal generation unit, 522, first gradation conversion unit, 530, second image luminance signal generation unit, 540, second image signal generation unit, 542, calculation unit, 544, second gradation conversion unit, 700, main pixel, BM, black matrix, CE, common electrode, CH, contact hole, DM, dummy light shielding layer, DL, signal wiring, GL, scanning wiring, LX, distance, L1 to L5, intervals, S1 to S10, area, SL, row of sub-pixels, SH, light shielding rate, θ, angle

Claims

1. a first liquid crystal display panel for displaying a color image, the first main pixels having a plurality of sub-pixels of different colors being arranged in a matrix in a first direction and a second direction perpendicular to the first direction; a second liquid crystal display panel that is located on an opposite side to a viewer side of the first liquid crystal display panel, overlaps the first liquid crystal display panel, has a plurality of second main pixels corresponding to the first main pixels, and displays a monochrome image; the second main pixel is divided into a plurality of regions, and has a pixel electrode and a plurality of light shields disposed in each of the regions; At least some of the light shields are formed of switching elements connected to the pixel electrodes, The plurality of light blocking bodies are arranged in a staggered manner, The light shielding body located within a set of the regions formed by adjacent regions forms a set of the light shielding body, the set of light shielding bodies uniformly shields light incident on the sub-pixels for each color; LCD display device.

2. the set of light shielding bodies uniformly shields light incident on the sub-pixels arranged consecutively for each color; the plurality of light shielding bodies are arranged in a staggered manner in units of the set of light shielding bodies; The liquid crystal display device according to claim 1 .

3. the plurality of light shields located within the second main pixel uniformly shield light incident on the sub-pixel for each color; The liquid crystal display device according to claim 2 .

4. The regions form a first set of regions arranged in two rows and two columns in the first direction and the second direction, and form a second set of two regions arranged in the second direction; a first row in which the first sets are aligned in the predetermined second direction and a second row in which the second sets are aligned in the predetermined second direction and shifted by one of the regions from the first row, are alternately aligned in the predetermined first direction; In the first set of the region, four of the light shields formed of the switching elements are arranged in the predetermined first direction to form the set of light shields; In the second set of the region, the two light shields formed of the switching elements and the two light shields formed of the dummy light shielding layers are aligned in the predetermined first direction to form the set of light shields. The liquid crystal display device according to claim 2 .

5. At least a portion of the light shielding bodies extends across the sub-pixels having different colors and shields light incident on the sub-pixels. The liquid crystal display device according to claim 2 .

6. the second liquid crystal display panel has a light-shielding pattern that is repeatedly arranged and has a light-shielding property; the light-shielding pattern includes a first light-shielding line extending in the first direction or the second direction and having a first inclined portion inclined with respect to the extending direction and a second inclined portion inclined in a direction opposite to the first inclined portion with respect to the extending direction, and a second light-shielding line adjacent to the first light-shielding line and symmetrical with the first light-shielding line with respect to the extending direction, the first light-shielding line and the second light-shielding line are formed from either a scanning line or a signal line of the second liquid crystal display panel; The liquid crystal display device according to claim 2 .

Images