Liquid crystal display device

Abstract

A liquid crystal display device includes a first liquid crystal display panel in which first main pixels including sub-pixels are arranged in a matrix and a color image is displayed, and a second liquid crystal display panel in which second main pixels including sub-pixels are arranged in a matrix. The second liquid crystal display panel includes second main pixels corresponding to the plurality of first main pixels and displays a monochromatic image. The second main pixel is divided into a plurality of regions and has pixel electrodes arranged in the plurality of regions, and a plurality of light shields. At least a portion of the plurality of light shields is formed by a switching element connected to each of the pixel electrodes, and the plurality of light shields are arranged in a staggered manner. The light shields located within a set of regions formed by adjacent regions form a set of light shields.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Japanese Patent Application No. 2023-108033 filed on June 30, 2023, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] The present application generally relates to liquid crystal display devices. Background Art

[0004] In the prior art, it is known that a liquid crystal display device enhances contrast by stacking a plurality of liquid crystal panels. For example, Unexamined Japanese Patent Application Publication No. 2021-535415 describes a display panel including a stacked optical control panel and a display liquid crystal panel.

[0005] In the unexamined Japanese patent application publication No. 2021-535415, the display liquid crystal panel realizes the display function, and the optical control panel controls the light incident on the display liquid crystal panel from the backlight. The optical control panel includes a plurality of signal lines (gate lines and data lines). At least a portion of the plurality of signal lines is a folding line. In the unexamined Japanese patent application publication No. 2021-535415, the moiré pattern of the display panel is improved by configuring the signal lines of the optical control panel as folding lines, and forming the signal lines of the optical control panel and the grid lines (gate lines and data lines) of the display liquid crystal panel in different patterns.

[0006] In the unexamined Japanese patent application publication No. 2021-535415, the signal line of the optical control panel is folded in a predetermined period. Therefore, the thin film transistor of the optical control unit driving the optical control panel periodically blocks the light incident on the sub-pixel unit of a specific color of the display liquid crystal panel, and therefore, the brightness of the sub-pixel unit of the specific color may decrease periodically. When the brightness of the sub-pixel unit of the specific color decreases periodically, color moiré appears in the display panel.

[0007] The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a liquid crystal display device in which color moiré is suppressed. Summary of the invention

[0008] In order to achieve the above object, a liquid crystal display device according to a first aspect of the present disclosure includes:

[0009] a first liquid crystal display panel, in which first main pixels including a plurality of sub-pixels of different colors are arranged in a matrix in a predetermined first direction and in a predetermined second direction perpendicular to the predetermined first direction, and the first liquid crystal display panel displays a color image; and

[0010] a second liquid crystal display panel, which is located on a side of the first liquid crystal display panel opposite to the observer-side surface and overlaps the first liquid crystal display panel, and includes second main pixels corresponding to a plurality of the first main pixels, and the second liquid crystal display panel displays a monochrome image, wherein

[0011] The second main pixel is divided into a plurality of regions and has pixel electrodes arranged in the plurality of regions and a plurality of light shielding members.

[0012] At least a portion of the plurality of light shielding members is formed by a switching element connected to each of the pixel electrodes, and the plurality of light shielding members are arranged in a staggered manner,

[0013] The light shielding members located within a group of regions formed by regions adjacent to each other form a group of light shielding members, and the group of light shielding members equally blocks light incident on the sub-pixels for each color.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory.

[0015] and is not intended to be a limitation of the present disclosure.

[0016] According to the present disclosure, the group of light shielding members blocks light incident on the sub-pixel equally for each color, and thus color moiré of the light shielding plate can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] A more complete understanding of the present application can be obtained when the following detailed description is considered in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram showing a liquid crystal display device according to Example 1;

[0019] Figure 2 is a plan view showing a first liquid crystal display panel according to Embodiment 1;

[0020] Figure 3 is a cross-sectional view showing a panel and a backlight according to Embodiment 1;

[0021] Figure 4 is a plan view showing a second liquid crystal display panel according to Example 1;

[0022] Figure 5 is a plan view showing a second primary pixel according to Embodiment 1;

[0023] Figure 6 is a plan view showing a region of a second primary pixel according to Embodiment 1;

[0024] Figure 7 yes Figure 6 A cross-sectional view of the scan line and the signal line shown in FIG. 1 taken along line AA;

[0025] Figure 8 yes Figure 6 A cross-sectional view of the switching element and the contact hole shown in FIG. 1 taken along line BB;

[0026] Fig. 9 is a plan view showing a switching element according to Embodiment 1;

[0027] Fig.10 is a plan view showing the outer shape of a light shielding member according to Embodiment 1;

[0028] Fig.11 is a diagram showing the overlap of four second main pixels and sub-pixels according to Embodiment 1;

[0029] Fig.12 is a diagram showing an overlap of a second main pixel and a sub-pixel according to Embodiment 1;

[0030] Fig.13 is a diagram showing the overlap of a light shielding member and a sub-pixel according to Embodiment 1;

[0031] Fig.14 is a diagram showing a unit image viewed from the front according to Embodiment 1;

[0032] Fig.15 is a diagram showing an example of a unit image viewed from a diagonal direction according to Embodiment 1;

[0033] Fig.16 is a diagram showing the angle of the viewing direction according to Embodiment 1;

[0034] Fig.17 is a diagram showing x values ​​and y values ​​in an evaluation image according to Embodiment 1;

[0035] Fig.18 is a diagram showing the light shielding rate according to Example 1;

[0036] Fig.19 is a diagram showing a light shielding ratio according to a comparative example;

[0037] Fig. 20 is a diagram showing an overlap of a light shielding member and a sub-pixel according to a comparative example;

[0038] Fig.21 is a block diagram showing a display controller according to Embodiment 1;

[0039] Fig. 22 is a diagram showing the overlap of four second main pixels and sub-pixels according to Embodiment 2;

[0040] Fig.23 is a diagram showing an overlap of a second main pixel and a sub-pixel according to Embodiment 2;

[0041] Fig.24 is a diagram showing the overlap of a light shielding member and a sub-pixel according to Embodiment 2;

[0042] Fig.25 is a diagram showing the overlap of a second main pixel and a sub-pixel according to Embodiment 3;

[0043] Fig.26 is a diagram showing an overlap of a second main pixel and a sub-pixel according to Embodiment 3;

[0044] Fig. 27 is a cross-sectional view showing a dummy light shielding layer according to Example 4;

[0045] Fig.28 is a plan view showing the outer shape of a light shielding member formed by a dummy light shielding layer according to Example 4;

[0046] Fig.29 is a diagram showing the overlap of a second main pixel and a sub-pixel according to Embodiment 4;

[0047] Fig.30 is a diagram showing the overlap of a second main pixel and a sub-pixel according to Embodiment 4;

[0048] Fig.31 is a diagram showing the overlap of a second main pixel and a sub-pixel according to Embodiment 5;

[0049] Fig.32 is a diagram showing the light shielding rate according to Example 5;

[0050] Fig.33 is a diagram showing the overlap of a second main pixel and a sub-pixel according to Embodiment 6;

[0051] Fig.34 is a diagram showing the overlap of a second main pixel and a sub-pixel according to Embodiment 7;

[0052] Fig.35 is a diagram showing a first light-shielding pattern and a second light-shielding pattern according to Embodiment 7;

[0053] Fig.36 is a diagram showing the overlap of a second main pixel and a sub-pixel according to Embodiment 8;

[0054] Fig.37 is a diagram showing the overlap of a second main pixel and a sub-pixel according to Embodiment 8;

[0055] Fig.38is a diagram showing the light shielding rate according to Example 8;

[0056] Fig.39 is a plan view showing a switching element according to a modified example;

[0057] Fig.40 is a plan view showing the outer shape of a light shielding member according to a modified example;

[0058] Fig.41 is a diagram showing an arrangement of a light shielding member according to a modified example;

[0059] Fig.42 is a diagram showing an arrangement of a light shielding member according to a modified example;

[0060] Fig.43 is a diagram illustrating a second primary pixel according to a modified example;

[0061] Fig.44 is a diagram illustrating an overlap of a second main pixel and a sub-pixel according to a modified example; and

[0062] Fig.45 is a diagram illustrating a light shielding ratio according to a modified example. Specific embodiments

[0063] Hereinafter, a liquid crystal display device according to various embodiments is described with reference to the accompanying drawings.

[0064] Example 1

[0065] Reference Figures 1 to 21 A liquid crystal display device 10 according to the present embodiment is described. The liquid crystal display device 10 displays a color image using a first liquid crystal display panel 100 and a second liquid crystal display panel 200 described later.

[0066] like Figure 1 As shown, the liquid crystal display device 10 includes a panel 50, a backlight 400, and a display controller 500. The panel 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 emits light onto the first liquid crystal display panel 100 and the second liquid crystal display panel 200. The display controller 500 controls the display of the first liquid crystal display panel 100 and the second liquid crystal display panel 200. Note that in this specification, for ease of understanding, Figure 1 In the liquid crystal display device 10, the right direction (right direction on the paper) is called the "+X direction", the upward direction (upward direction on the paper) is called the "+Y direction", and the direction perpendicular to the +X direction and the +Y direction (front direction on the paper) is called the "+Z direction".

[0067] panel

[0068] The panel 50 includes 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 observer side (+Z side) and displays a color image. The second liquid crystal display panel 200 is located on the side opposite to the observer side surface of the first liquid crystal display panel 100 (the back 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 a monochrome image.

[0069] First liquid crystal display panel

[0070] In one example, the first liquid crystal display panel 100 is implemented as a known transmissive lateral electric field liquid crystal display panel. The first liquid crystal display panel 100 is an active matrix driven by a thin film transistor (TFT).

[0071] like Figure 2 As shown, the first liquid crystal display panel 100 includes first main pixels 102 arranged in a matrix. Each first main pixel 102 is formed by a red sub-pixel 104R emitting red light, a green sub-pixel 104G emitting green light, and a blue sub-pixel 104B emitting blue light. The red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B each have a rectangular shape and are arranged in sequence in the X direction. Note that the red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B are collectively referred to as "sub-pixels 104".

[0072] like Figure 3 As shown, 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 disposed on the first TFT substrate 110. The second polarizing plate 134 is disposed on the first counter substrate 120.

[0073] In one example, the first TFT substrate 110 is implemented as a glass substrate. TFTs, common electrodes, pixel electrodes, alignment films, etc. (all not shown in the drawings) are provided on the main surface 110a of the first TFT substrate 110 on the first liquid crystal 130 side. The TFTs of the first TFT substrate 110 are provided to select the sub-pixels 104. The alignment films of the first TFT substrate 110 align the first liquid crystal 130.

[0074] In addition, a plurality of common lines, a plurality of scan lines, and a plurality of signal lines (all not shown in the drawings) are formed on the main surface 110a of the first TFT substrate 110. The common line supplies a common voltage to a common electrode that applies a voltage to the first liquid crystal 130. The scan line provides a voltage that makes the TFT work. The scan 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 line and the scan line, and the TFT is arranged at the intersection between the scan line and the signal line. The first polarizer 132 is arranged on the main surface 110b of the first TFT substrate 110 on the side opposite to the main surface 110a.

[0075] like Figure 3 As shown, the first counter substrate 120 is opposite to the first TFT substrate 110. The first counter substrate 120 is attached to the first TFT substrate 110 through a sealing material 138. In one example, the first counter substrate 120 is implemented as a glass substrate. A color filter 122, a black matrix BM, an alignment film, etc. are arranged on a main surface 120a of the first counter substrate 120 on the first liquid crystal 130 side.

[0076] In one example, the color filter 122 is implemented as 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. Each of the red color filter, the green color filter, and the blue color filter of the color filter 122 is surrounded by the black matrix BM and corresponds to each of the red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B. Figure 2 As shown, the black matrix BM defines each first main pixel 102 and each sub-pixel 104. The alignment film aligns the first liquid crystal 130. The second polarizing plate 134 is disposed on the main surface 120b of the first counter substrate 120 opposite to the main surface 120a. Note that for ease of understanding, Figure 3 The black matrix BM, alignment film, etc. are omitted.

[0077] like Figure 3 As shown, the first liquid crystal 130 is sandwiched between the first TFT substrate 110 and the first counter substrate 120. In one example, the first liquid crystal 130 is implemented as a positive 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 the alignment film. In addition, due to the application of voltage, the first liquid crystal 130 rotates in a plane parallel to the main surface 110a of the first TFT substrate 110.

[0078] The first polarizing plate 132 is disposed on the main surface 110b of the first TFT substrate 110. The second polarizing plate 134 is disposed on the main surface 120b of the first counter substrate 120. One of the transmission axes of the first polarizing plate 132 and the second polarizing plate 134 is arranged to be parallel to the alignment direction of the first liquid crystal 130. In addition, the transmission axes of the first polarizing plate 132 and the second polarizing plate 134 are orthogonal to each other. The first polarizing plate 132 is attached to the second counter substrate 220 (described later) of the second liquid crystal display panel 200 by a light-transmitting adhesive layer 150. In one example, the adhesive layer 150 is implemented as an optically clear adhesive (OCA).

[0079] 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 scan lines, the signal lines, and the common lines based on the color image signals supplied from the display controller 500.

[0080] Second liquid crystal display panel

[0081] like Figure 3 As shown, the second liquid crystal display panel 200 is located on the back 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 through an adhesive layer 150. The second liquid crystal display panel 200 displays a monochrome image.

[0082] In this embodiment, the second liquid crystal display panel 200 is implemented as a transmissive lateral electric field liquid crystal display panel using positive liquid crystal. The second liquid crystal display panel 200 is an active matrix driven by a switching element 240 described later. Figure 4 As shown, the second liquid crystal display panel 200 includes second main pixels 202 arranged in a matrix form. In this embodiment, one second main pixel 202 of the second liquid crystal display panel 200 corresponds to 16 first main pixels 102 of the first liquid crystal display panel 100 (4×4: four in the X direction and four in the Y direction). Specifically, one second main pixel 202 of the second liquid crystal display panel 200 transmits light from the backlight 400 to the 16 first main pixels 102 of the first liquid crystal display panel 100. Note that the scan line GL and the signal line DL are arranged in Figure 4 In the following drawings, the scan lines GL and the signal lines DL may be shown with dotted lines or solid lines.

[0083] like Figure 3As shown, 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 disposed on the second TFT substrate 210. Note that in this embodiment, the first polarizing plate 132 of the first liquid crystal display panel 100 is also used as a polarizing plate on the light emitting side of the second liquid crystal display panel 200. The second liquid crystal display panel 200 is not provided with a color filter and a black matrix.

[0084] In one example, the second TFT substrate 210 is implemented as a glass substrate. Common lines (not shown), a plurality of scan lines GL, a plurality of signal lines DL, an alignment film (not shown), and a switch element 240, a pixel electrode 250, a common electrode CE, and a light shielding member 300 of the second main pixel 202 are formed on the main surface 210a of the second liquid crystal 230 side of the second TFT substrate 210. The common line provides a common voltage to the common electrode CE that applies a voltage to the second liquid crystal 230. The scan line GL provides a voltage that causes the switch element 240 to operate. The signal line DL provides a voltage to the pixel electrode 250 that applies a voltage to the second liquid crystal 230 via the switch element 240. The alignment film aligns the second liquid crystal 230. The third polarizing plate 232 is disposed on the main surface 210b of the second TFT substrate 210 on the side opposite to the main surface 210a.

[0085] In the present embodiment, the light shielding member 300 of the second main pixel 202 is formed by the switching element 240. The configuration of the second main pixel 202, the scanning line GL, the signal line DL, etc. will be described later.

[0086] The second opposing substrate 220 is opposite to the second TFT substrate 210. The second opposing substrate 220 is attached to the second TFT substrate 210 through a sealing material 238. In one example, the second opposing substrate 220 is implemented as a glass substrate. An alignment film (not shown) for aligning the second liquid crystal 230 is provided on the main surface 220a on the second liquid crystal 230 side of the second opposing substrate 220. The adhesive layer 150 is provided on the main surface 220b on the side opposite to the main surface 220a of the second opposing substrate 220. The second opposing substrate 220 is attached to the first liquid crystal display panel 100 (first polarizing plate 132) via the adhesive layer 150.

[0087] 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 implemented as a positive nematic liquid crystal. The second liquid crystal 230 is initially aligned in the Y direction by the alignment film. Due to the applied voltage, the second liquid crystal 230 rotates in a plane parallel to the main surface 210a of the second TFT substrate 210.

[0088] The third polarizing plate 232 is disposed on the main surface 210b of the second TFT substrate 210. The transmission axis of the third polarizing plate 232 is arranged to be parallel to the alignment direction of the second liquid crystal 230. The transmission axis of the third polarizing plate 232 and the transmission axis of the first polarizing plate 132 of the first liquid crystal display panel 100 (the polarizing plate on the light exit side of the second liquid crystal display panel 200) are orthogonal to each other, and the second liquid crystal display panel 200 is operated in the normally black mode.

[0089] 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 scan lines GL, the signal lines DL, and the common lines based on signals supplied from the display controller 500.

[0090] Reference Figures 4 to 8 The configuration of the scanning line GL, the signal line DL, and the second main pixel 202 is described. Figure 5 is a plan view showing the second primary pixel 202 . Figure 6 is a plan view showing a region 202A of the second primary pixel 202 . Figure 7 yes Figure 6 2 is a cross-sectional view of the scanning line GL and the signal line DL shown in FIG. Figure 8 yes Figure 6 2 is a cross-sectional view of the switching element 240 and the contact hole CH shown in FIG. 2 taken along line BB. Fig. 9 2 is a plan view showing the switch element 240. Figure 5 , Figure 6 and Fig. 9 The first insulating layer 282, the second insulating layer 284, etc. are omitted.

[0091] like Figure 4 As shown, the second primary pixel 202 has a rectangular shape. Figure 5 As shown, the second primary pixel 202 is divided into four regions 202A of two rows and two columns in the X direction and the Y direction. Figure 5 and Figure 6 As shown, a switching element 240 and a pixel electrode 250 are arranged in each region 202A. One second main pixel 202 (four pixel electrodes 250) is driven by a voltage (signal) from a pair of adjacent scan 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 scan lines GL can be implemented as two scan lines GL branched from one scan line. The pair of adjacent signal lines DL can be implemented as two signal lines DL branched from one signal line.

[0092] like Figures 4 to 6 As shown in FIG. 1 , the scanning line GL extends linearly in the X direction. Figure 7 As shown, the scanning line GL is formed on the main surface 210 a of the second TFT substrate 210 and is covered by the first insulating layer 282 .

[0093] like Figures 4 to 6 As shown in FIG. 1 , the signal line DL extends linearly in the Y direction. The signal line DL branches in the X direction and is connected to the switch element 240. Figure 7 As shown, the signal line DL is formed on the first insulating layer 282 and is covered by the second insulating layer 284 .

[0094] like Figure 7 and Figure 8 As shown, the common electrode CE of the second main pixel 202 is formed on the second insulating layer 284 . In one example, the common electrode CE is formed of indium tin oxide (ITO). The common electrode CE is covered by the third insulating layer 286 .

[0095] like Figure 5 and Figure 6 As shown, each pixel electrode 250 of the second primary pixel 202 has a comb-tooth shape and is arranged in each of the four regions 202A. Each pixel electrode 250 is connected to each switching element 240 (drain 248). Figure 8 As shown, the pixel electrode 250 is formed on the third insulating layer 286. In one example, the pixel electrode 250 is formed of ITO.

[0096] Each switching element 240 of the second main pixel 202 is connected to each pixel electrode 250. In this specification, as described later, each switching element 240 forms a light shielding member 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 100. In other words, each switching element 240 also serves as a light shielding member that blocks light emitted from the backlight 400 and incident on the sub-pixel 104 of the first liquid crystal display panel 100.

[0097] like Figure 8 and Fig. 9 As shown, each switching element 240 includes a gate electrode 242, a semiconductor layer 244, a source electrode 246, and a drain electrode 248. In one example, the switching element 240 is implemented as a TFT element. Note that the arrangement of the switching element 240 (light shielding member 300) will be described later.

[0098] The gate electrode 242 is formed integrally with the scan line GL on the main surface 210a of the second TFT substrate 210. Like the scan line GL, the gate electrode 242 is covered by the first insulating layer 282. The semiconductor layer 244 is provided on the gate electrode 242 in an island-like manner via the first insulating layer 282. In one example, the semiconductor layer 244 is formed of amorphous silicon. The source electrode 246 is formed integrally with the signal line DL. The drain electrode 248 extends from the semiconductor layer 244 in the X direction and is connected to the pixel electrode 250. Figure 8 As shown, the drain electrode 248 is connected to the pixel electrode 250 at the contact portion 248a via the contact hole CH. The contact hole CH penetrates the third insulating layer 286 and the second insulating layer 284. The gate 242, the source electrode 246 and the drain electrode 248 are formed of a light shielding metal such as aluminum (Al), molybdenum (Mo), etc.

[0099] like Figure 7 and Figure 8 As shown, the first insulating layer 282 covers the scan line GL and the gate electrode 242 of the switching element 240. The second insulating layer 284 covers the semiconductor layer 244, the source electrode 246 and the drain electrode 248 of the switching element 240, and the first insulating layer 282. 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), etc.

[0100] The gate electrode 242, the source electrode 246, and the drain electrode 248 of each switching element 240 are formed of a light shielding metal. Thus, each switching element 240 including the contact portion 248a of the drain electrode 248 functions as a light shielding member that blocks light emitted from the backlight 400 and incident on the sub-pixel 104 of the first liquid crystal display panel 100. When viewed from above from the observer side, the light shielding member 300 formed by the switching element 240 has a Fig.10 The appearance shown.

[0101] In the following, reference is made to Figures 11 to 13 The configuration of the light shielding member 300 (switching element 240 ) and the overlap of the light shielding member 300 with the sub-pixel 104 of the first liquid crystal display panel 100 are described. Fig.11 The overlap of four second primary pixels 202 and sub-pixels 104 is shown. Fig.12 An overlap of a second primary pixel 202 and a sub-pixel 104 is shown. Fig.13 The overlap of the light shield 300 and the sub-pixel 104 is shown. Figures 11 to 13 The black matrix BM of the first liquid crystal display panel 100 is omitted in the following drawings.

[0102] In this embodiment, if Fig.11 and 12As shown, one second primary pixel 202 corresponds to 16 first primary pixels 102 arranged in four rows and four columns in the X direction and the Y direction. The second primary pixel 202 is divided into four regions 202A in two rows and two columns in the X direction and the Y direction. Each region 202A corresponds to four first primary pixels 102 in two rows and two columns in the X direction and the Y direction.

[0103] In this embodiment, two regions 202A adjacent in the X direction form a group 204A. Two light shielding members 300 are located in the group 204A of the regions 202A. In addition, in the groups 204A adjacent in the Y direction, the positions of the groups 204A are shifted in the X direction by an amount corresponding to one region 202A.

[0104] In addition, the two light shielding members 300 located in the group 204A of the region 202A form a group 302A. The two light shielding members 300 forming the group 302A of the light shielding members 300 are arranged close to each other. Fig.11 As shown, it is preferred that the groups 302A of the light shielding members 300 are arranged in the X direction at intervals of twice the X-direction width of the region 202A, and in the Y direction at intervals of twice the Y-direction width of the region 202A. In the groups 204A of the regions 202A adjacent in the Y direction, the positions of the groups 204A are offset in the X direction by an amount corresponding to one region 202A, whereby the arrangement of the light shielding members 300 is a staggered arrangement in which the groups 302A are offset by half a pitch in the X and Y directions. Note that each of the light shielding members 300 forming the group 302A of the light shielding members 300 corresponds to a switching element 240 connected to a pixel electrode 250 arranged in each of the two regions 202A forming the group 204A of the region 202A, and that in Figure 5 , corresponds to two adjacent switching elements 240 located on the +Y side.

[0105] like Figures 11 to 13As shown, the group 302A of the light shielding members 300 overlaps with four sub-pixels 104 arranged continuously in the X direction, and blocks light incident on these sub-pixels 104. Specifically, the group 302A of the light shielding members 300 overlaps with four sub-pixels 104 arranged in sequence from the -X side in the order of the green sub-pixel 104G, the blue sub-pixel 104B, the red sub-pixel 104R, and the green sub-pixel 104G. The group 302A of the light shielding members 300 blocks light emitted from the backlight 400 and incident on these sub-pixels 104. Among the light shielding members 300 forming the group 302A of the light shielding members 300, the light shielding member 300 located on the -X side spans over the green sub-pixel 104G and the blue sub-pixel 104B to block light incident on the green sub-pixel 104G and the blue sub-pixel 104B. Among the light shielding members 300 forming the group 302A of light shielding members 300 , the light shielding member 300 located on the +X side spans across the red sub-pixel 104R and the green sub-pixel 104G to block light incident on the red sub-pixel 104R and the green sub-pixel 104G.

[0106] like Fig.13 As shown, when S1 is the area where the light shielding member 300 located on the -X side shields the green sub-pixel 104G, S2 is the area where the light shielding member 300 located on the -X side shields the blue sub-pixel 104B, S3 is the area where the light shielding member 300 located on the +X side shields the red sub-pixel 104R, and S4 is the area where the light shielding member 300 located on the +X side shields the green sub-pixel 104G, the light shielding member 300 located on the -X side and the light shielding member 300 located on the +X side are arranged so that S1+S4=S2=S3. Therefore, the area (S1+S4) of the green sub-pixel 104G (two green sub-pixels 104G) shielded by the group 302A of the light shielding member 300, the area (S2) of the blue sub-pixel 104B shielded by the group 302A of the light shielding member 300, and the area (S3) of the red sub-pixel 104R shielded by the group 302A of the light shielding member 300 are equal. That is, the group 302A of the light shielding member 300 shields the sub-pixels 104 arranged continuously in the X direction equally for each color.

[0107] In the present embodiment, the groups 302A of the light shielding members 300 are arranged in a staggered manner in the X direction and the Y direction in units of the groups 302A, and for each color, the sub-pixels 104 arranged continuously in the X direction are equally shielded by the groups 302A of the light shielding members 300. Thus, the sub-pixels 104 of a specific color are not periodically shielded. In addition, the color difference caused by the shielded sub-pixels 104 is averaged for the entire display of the liquid crystal display device 10. Therefore, the liquid crystal display device 10 can suppress color moiré.

[0108] In addition, in a second main pixel 202, four light shielding members 300 ( Fig.12 ) as a group of four for each color equally shielding the sub-pixel 104. Therefore, when a shift occurs in the overlap of 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 a diagonal direction, the four light shielding members 300 as a group of four for each color can substantially equally shield the sub-pixels 104 of different colors. Therefore, the liquid crystal display device 10 can further suppress color moiré.

[0109] Next, the suppression of color moiré due to the shielding of the sub-pixels 104 arranged successively in the X direction by the group 302A of the light shielding members 300 for each color is described. In this specification, the size of the 16 (four rows and four columns) first pixels 102 in the liquid crystal display device 10 is 259 μm×259 μm. The area of ​​the light shielding member 300 of the liquid crystal display device 10 is 1469 μm 2 .

[0110] First, a unit image of a group 302A of 16 first primary pixels 102 and a light shielding member 300 is created to simulate being viewed from the observer's side. The created unit images are a unit image of the group 302A of the 16 first primary pixels 102 and the light shielding member 300 viewed from the front and a unit image of the group 302A of the 16 first primary pixels 102 and the light shielding member 300 viewed from a diagonal direction. Fig.14 Shows a unit image viewed from the front. Fig.15 An example of a unit image viewed from a diagonal direction is shown.

[0111] In the unit image viewed from the diagonal direction, taking into account the thickness, refractive index, etc. of the first liquid crystal display panel 100 and the second liquid crystal display panel 200, the position of the group 302A of the light shielding member 300 is shifted in the +X direction by an amount corresponding to the distance LX from the position of the group 302A of the light shielding member 300 in the unit image viewed from the front, according to the angle θ of the viewing direction (θ=2.2°, 4.3°, 6.3°, 8.3°, 10.3°, 12.3°). The viewing direction is the direction from the front toward the -X side, and the angle θ is as follows: Fig.16 Angles shown relative to the +Z direction (left rotation).

[0112] In the unit image, the colors of the red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B are defined as their respective colors (red, green, and blue), and the brightness of the red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B is defined as the brightness of the state in which the first primary pixel 102 displays white when viewed from the front. In addition, the light shielding member 300 is shown in black. Note that for ease of understanding, two light shielding members 300 that do not form a group 302A in the second primary pixel 202 corresponding to the 16 first primary pixels 102 are omitted.

[0113] Next, the created unit images are arranged into a matrix (e.g., m images × n images) to create evaluation images viewed from the front (1024 pixels × 1024 pixels) and evaluation images viewed from the diagonal direction (θ = 2.2°, 4.3°, 6.3°, 8.3°, 10.3°, 12.3°). In addition, RGB values ​​(8 bits, 0 to 255 levels) obtained by averaging the entire evaluation image are obtained from the created evaluation images. In addition, the x value and y value in the CIE color space are calculated based on the obtained RGB brightness values. Fig.17 The x values ​​and y values ​​in the evaluation image viewed from the front and the evaluation image viewed from the diagonal direction are shown.

[0114] like Fig.17 As shown, the range of the change of the x value and the y value according to the viewing direction is less than 0.01. In subjective evaluation, when the range of the change of the x value and the y value is 0.01 or less, the observer cannot recognize the color moiré or is not bothered by the color moiré.

[0115] The evaluation image corresponds to a state in which the liquid crystal display device is viewed from the front or from a diagonal direction, in which the group 302A of the light shielding members 300 shields the sub-pixels 104 arranged continuously in the X direction equally for each color. Therefore, by shielding the sub-pixels 104 of different colors arranged continuously in the X direction equally for each color by the group 302A of the light shielding members 300, color moiré can be suppressed.

[0116] Next, the angle θ of the viewing direction and the light shielding rate SH of the light shielding member 300 are described. The light shielding rate SH of the light shielding member 300 is the ratio of the area of ​​the light shielding member 300 (four light shielding members) located in one second main pixel 202 to block the light incident from the backlight 400 on the opening of each of the red sub-pixel 104R (16 sub-pixels), the green sub-pixel 104G (16 sub-pixels), and the blue sub-pixel 104B (16 sub-pixels) corresponding to the one second main pixel 202. As described above, the position of the light shielding member 300 relative to the sub-pixel 104 changes according to the angle θ of the viewing direction, and thus, the light shielding rate SH of the light shielding member 300 changes according to the angle θ of the viewing direction.

[0117] Fig.18 The light shielding rate SH of this embodiment is shown. Fig.19 The light shielding rate SH of the comparative example is shown. Fig. 20 As shown, in the main pixel 700 of the comparative example, four light shielding members 300 are arranged in parallel rows in the X direction and the Y direction.

[0118] First, the light shielding rate SH of the comparative example is described. Fig.19 As shown, when the angle of the viewing direction gradually transitions from the front (0°) to the diagonal direction, the light shielding rate SH of the green sub-pixel 104G increases slightly from the front, and decreases from the angle θ=2.2°. At the same time, when θ=2.2°, the light shielding rate SH of the red sub-pixel 104R and the blue sub-pixel 104B is very small. Therefore, in the comparative example, when the angle θ=2.2°, the mixed color of red and blue is emphasized. The light shielding rate SH of the blue sub-pixel 104B increases from the front to the angle θ=6.3°, and decreases when the angle θ=6.3° or less. At the same time, when the angle θ=6.3°, the light shielding rate SH of the red sub-pixel 104R and the green sub-pixel 104G is small. Therefore, in the comparative example, when the angle θ=6.3°, the mixed color of red and green is emphasized. The light shielding rate SH of the red sub-pixel 104R decreases from the front to θ=2.2°, and increases from near θ=4° to θ=10.3°. At the same time, when the angle θ=10.3°, the shading rate SH of the green sub-pixel 104G and the blue sub-pixel 104B is very small. Therefore, in the comparative example, when the angle θ=10.3°, the mixed color of green and blue is emphasized. That is, in the comparative example, due to the change in viewing angle, the sub-pixel 104 shielded by the shading member 300 changes from the green sub-pixel 104G to the blue sub-pixel 104B, and then changes from the blue sub-pixel 104B to the red sub-pixel 104R. Therefore, the color mixture of red, green and blue becomes unbalanced. As a result, the observer sees color moiré.

[0119] like Fig.18As shown, in the present embodiment, when the angle θ=2.2°, 6.3° and 10.3°, the shading rates SH of the red sub-pixel 104R, the green sub-pixel 104G and the blue sub-pixel 104B are different from each other. However, the change of the shading rate SH relative to the angle θ of the viewing direction is very small. In addition, when the angle θ=0°, 4.3° and 8.3°, the shading rates SH of the red sub-pixel 104R, the green sub-pixel 104G and the blue sub-pixel 104B are substantially equal. Therefore, even when a shift occurs in the overlap of 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 a diagonal direction, the imbalance of the color mixing of red, green and blue is suppressed. As a result, the four shading members 300 can substantially equally shield the sub-pixels 104 of different colors for each color, so that the liquid crystal display device 10 can suppress color moiré.

[0120] Backlight

[0121] like Figure 1 As shown, the backlight 400 is arranged on the back side (-Z side) of the second liquid crystal display panel 200. In one example, the backlight 400 is implemented as a direct-type backlight. The backlight 400 includes a white light emitting diode (LED) element, a reflective sheet, a diffusion sheet, etc. (all not shown in the drawings).

[0122] Display Controller

[0123] The display controller 500 controls display of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 .

[0124] like Fig.21 As shown, the display controller 500 includes an image data distributor 510 , a first image signal generator 520 , a second image brightness signal generator 530 , and a second image signal generator 540 .

[0125] The image data distributor 510 distributes input image data to the first image signal generator 520 and the second image brightness signal generator 530 .

[0126] The first image signal generator 520 generates a color image to be displayed on the first liquid crystal display panel 100 according to the input image data distributed from the image data distributor 510. Specifically, the first grayscale converter 522 of the first image signal generator 520 performs grayscale conversion for converting the distributed input image data into color image data having a brightness-grayscale characteristic suitable for the first liquid crystal display panel 100. A lookup table in which an input-output relationship is pre-set is used in the conversion of data. The first image signal generator 520 sends a color image signal representing the generated color image to the first driver circuit 136 of the first liquid crystal display panel 100.

[0127] The second image brightness signal generator 530 generates a brightness signal according to the input image data distributed from the image data distributor 510, and the brightness signal is used to generate a monochrome image to be displayed on the second liquid crystal display panel 200. In one example, the second image brightness signal generator 530 calculates the brightness level of the second main pixel 202 of the second liquid crystal display panel 200 according to the average value, frequent value, minimum value, maximum value, etc. of the red grayscale value, green grayscale value, and blue grayscale value in the 16 first main pixels 102 of the first liquid crystal display panel 100 to which the light that has transmitted the second main pixel 202 of the second liquid crystal display panel 200 is incident. The calculated brightness level may be a grayscale value. The second image brightness signal generator 530 sends a brightness signal representing the calculated brightness level to the second image signal generator 540.

[0128] The second image signal generator 540 generates a monochrome image to be displayed on the second liquid crystal display panel 200 based on the brightness signal sent from the second image brightness signal generator 530. In one example, the second image signal generator 540 generates a monochrome image that has been averaged and grayscale converted. Specifically, the calculator 542 of the second image signal generator 540 averages the brightness levels of the second main pixels 202 located within a predetermined distance from the target second main pixel 202 by weighted averaging based on, for example, the distance from the target second main pixel 202. As a result, the second image signal generator 540 can generate a monochrome image with blurred edges. In addition, the second grayscale converter 544 of the second image signal generator 540 generates a monochrome image having brightness-grayscale characteristics suitable for the second liquid crystal display panel 200. The configuration of the second grayscale converter 544 is the same as that of the first grayscale converter 522 of the first image signal generator 520.

[0129] Due to the calculation of the brightness level, the averaging process, etc. performed by the second image brightness signal generator 530, the monochrome image signal sent to the second liquid crystal display panel 200 is delayed relative to the color image signal sent to the first liquid crystal display panel 100. Therefore, the display controller 500 includes a synchronization circuit (not shown) for synchronizing the output of the monochrome image signal and the color image signal. Due to the synchronization circuit, a monochrome image corresponding to the color image of the first liquid crystal display panel 100 is displayed on the second liquid crystal display panel 200, thereby displaying a color image suitable for the liquid crystal display device 10.

[0130] The display controller 500 includes a central processing unit (CPU), a memory, etc. In one example, the CPU executes a program stored in the memory to implement the functions of the display controller 500 .

[0131] As described above, the groups 302A of the light shielding members 300 are arranged in a staggered manner in units of the groups 302A, and the groups 302A of the light shielding members 300 shield the sub-pixels 104 arranged continuously in the X direction equally for each color. Thus, the liquid crystal display device 10 can suppress color moiré. In addition, the four light shielding members 300 located in the second main pixel 202 shield the sub-pixels 104 equally for each color as a group of four, so that the liquid crystal display device 10 can further suppress color moiré.

[0132] In addition, 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 in each region 202A. Thus, the liquid crystal display device 10 can suppress the generation of dark spots that are easily visible to the observer. Dark spots are defects caused by poor operation of the pixel electrode 250.

[0133] Example 2

[0134] In Embodiment 1, 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. However, the number of divisions of the second main pixel 202 is not limited to four. Like the liquid crystal display device 10 of Embodiment 1, the liquid crystal display device 10 of this embodiment includes a panel 50, a backlight 400, and a display controller 500. The switch elements 240 of the first liquid crystal display panel 100 and the second liquid crystal display panel 200

[0135] The configuration of (light shielding member 300 ) and the like is the same as that of Embodiment 1. Thus, the arrangement of the light shielding member 300 and the overlap of the light shielding member 300 with the sub-pixel 104 of the first liquid crystal display panel 100 are described next.

[0136] As in Embodiment 1, in this embodiment, one second primary pixel 202 corresponds to 16 first primary pixels 102 arranged in four rows and four columns in the X direction and the Y direction. Fig. 22 and Fig.23 As shown, the second main pixel 202 of this embodiment is divided into 12 regions 202A in four rows and three columns in the X direction and the Y direction. Each region 202A corresponds to four sub-pixels 104 arranged in the X direction.

[0137] In addition, four adjacent regions 202A in two rows and two columns in the X and Y directions form a group 204A. Four light shielding members 300 are located in the group 204A of the region 202A. In the adjacent groups 204A in the Y direction, the positions of the groups 204A are shifted in the X direction by an amount corresponding to one region 202A.

[0138] In this embodiment, four light shielding members 300 in group 204A of region 202A form a group 302A. Figure 22 to Figure 24 As shown, four light shielding members 300 forming a group 302A of light shielding members 300 are arranged in a row in the X direction and arranged close to each other. The light shielding members 300 forming the group 302A of light shielding members 300 correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the four regions 202A forming the group 204A of regions 202A.

[0139] like Fig. 22 As shown, it is preferred that the groups 302A of the light shielding members 300 are arranged at intervals of twice the width of the region 202A in the X direction, and are arranged at intervals of four times the width of the region 202A in the Y direction. In the groups 204A of the regions 202A adjacent in the Y direction, the positions of the groups 204A are offset in the X direction by an amount corresponding to one region 202A, whereby the arrangement of the light shielding members 300 is a staggered arrangement in which the units of the groups 302A are offset by half a pitch in the X direction and the Y direction. In the present embodiment, the four light shielding members 300 forming the group 302A of the light shielding members 300 are also referred to as light shielding member 300a, light shielding member 300b, light shielding member 300c, and light shielding member 300d in order from the -X side.

[0140] like Figure 22 to Figure 24 As shown, the group 302A of the light shielding members 300 overlaps with eight sub-pixels 104 of two rows and four columns in the X direction and the Y direction, and blocks light incident on these sub-pixels 104. Fig.23 In the example shown, the group 302A of the light shielding member 300 overlaps two blue sub-pixels 104B, two red sub-pixels 104R, two green sub-pixels 104G, and two blue sub-pixels 104B in order from the -X side. The group 302A of the light shielding member 300 blocks light emitted from the backlight 400 and incident on these sub-pixels 104.

[0141] The light shielding member 300a spans over two blue sub-pixels 104B arranged in the Y direction and two red sub-pixels 104R arranged in the Y direction to block light incident on these sub-pixels 104. The light shielding member 300b blocks light incident on two red sub-pixels 104R arranged in the Y direction. The light shielding member 300c blocks light incident on two green sub-pixels 104G arranged in the Y direction. The light shielding member 300d spans over two green sub-pixels 104G arranged in the Y direction and two blue sub-pixels 104B arranged in the Y direction to block light incident on these sub-pixels 104.

[0142] like Fig.24As shown, when S5 is the area of ​​two blue sub-pixels 104B arranged in the Y direction shielded by the light shading member 300a, S6 is the area of ​​two red sub-pixels 104R arranged in the Y direction shielded by the light shading member 300a, S7 is the area of ​​two red sub-pixels 104R arranged in the Y direction shielded by the light shading member 300b, S8 is the area of ​​two green sub-pixels 104G arranged in the Y direction shielded by the light shading member 300c, S9 is the area of ​​two green sub-pixels 104G arranged in the Y direction shielded by the light shading member 300d, and S10 is the area of ​​two blue sub-pixels 104B arranged in the Y direction shielded by the light shading member 300d, the light shading members 300a to 300d are arranged so that S5+S10=S6+S7=S8+S9. Therefore, the area (S5+S10) of the blue sub-pixel 104B (four blue sub-pixels 104B) shielded by the group 302A of the light shielding member 300, the area (S6+S7) of the red sub-pixel 104R (two red sub-pixels 104R) shielded by the group 302A of the light shielding member 300, and the area (S8+S9) of the green sub-pixel 104G shielded by the group 302A of the light shielding member 300 are equal. That is, as in Embodiment 1, the group 302A of the light shielding member 300 of this embodiment also shields the sub-pixels 104 arranged continuously in the X direction equally for each color. Therefore, in this embodiment, the liquid crystal display device 10 can also suppress color moiré.

[0143] In addition, in one second main pixel 202, the 12 light shielding members 300 ( Fig.23 ) are used as a group of 12 to equally mask the sub-pixels 104 for each color. Therefore, like the liquid crystal display device 10 of the first embodiment, the liquid crystal display device 10 of the present embodiment can further suppress color moiré.

[0144] As described above, the groups 302A of the light shielding members 300 are arranged in a staggered manner in units of the groups 302A, and the sub-pixels 104 arranged continuously in the X direction are shielded equally for each color by the groups 302A of the light shielding members 300. In this way, the liquid crystal display device 10 of the present embodiment can suppress color moiré. In addition, the 12 light shielding members 300 located in the second main pixel 202 shield the sub-pixels 104 equally for each color as a group of 12, whereby the liquid crystal display device 10 of the present embodiment can further suppress color moiré. In addition, the pixel electrode 250 is provided in each region 202A, whereby the liquid crystal display device 10 of the present embodiment can suppress the generation of dark spots that are easily visible to the observer.

[0145] Example 3

[0146] In Embodiment 2, the second main pixel 202 is divided into 12 regions 202A of four rows and three columns in the X direction and the Y direction. However, a configuration in which the second main pixel 202 is divided into 16 regions 202A of four rows and four columns in the X direction and the Y direction may be adopted. Like the liquid crystal display device 10 of Embodiment 1, the liquid crystal display device 10 of this embodiment includes a panel 50, a backlight 400, and a display controller 500. The configuration of the switching element 240 (light shielding member 300) of the first liquid crystal display panel 100, the second liquid crystal display panel 200, etc. is the same as that of Embodiment 1. Thus, the arrangement of the light shielding member 300 and the overlap of the light shielding member 300 with the sub-pixel 104 of the first liquid crystal display panel 100 are described next.

[0147] As in Embodiment 1, in this embodiment, one second primary pixel 202 corresponds to 16 first primary pixels 102 in four rows and four columns in the X direction and the Y direction. Fig.25 and Fig.26 As shown, the second primary pixel 202 of this embodiment is divided into 16 regions 202A of four rows and four columns in the X direction and the Y direction. Each region 202A corresponds to three sub-pixels 104 (one first primary pixel 102) arranged in the X direction.

[0148] In addition, four adjacent regions 202A in two rows and two columns in the X and Y directions form a group 204A. Four light shielding members 300 are located in the group 204A of the regions 202A. In the adjacent groups 204A in the X direction, the positions of the groups 204A are shifted in the Y direction by an amount corresponding to one region 202A.

[0149] As in Embodiment 2, four light shielding members 300 located in the group 204A of the region 202A form a group 302A. The four light shielding members 300 forming the group 302A of the light shielding members 300 are arranged in a row in the X direction and are arranged close to each other. The light shielding members 300 forming the group 302A of the light shielding members 300 correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the four regions 202A forming the group 204A of the region 202A. Fig.25 As shown, it is preferred that the groups 302A of the light shielding members 300 are arranged at intervals of four times the width of the region 202A in the X direction, and are arranged at intervals of two times the width of the region 202A in the Y direction. In the groups 204A of the regions 202A adjacent in the X direction, the positions of the groups 204A are shifted in the Y direction by an amount corresponding to one region 202A, whereby the arrangement of the light shielding members 300 is a staggered arrangement in which the units of the groups 302A are shifted by half a pitch in the X direction and the Y direction.

[0150] like Fig.25 and Fig.26As shown, the group 302A of the light shielding members 300 overlaps with eight sub-pixels 104 of two rows and four columns in the X direction and the Y direction, and blocks light incident on these sub-pixels 104. Fig.25 and Fig.26 In the example shown, the group 302A of the light shielding member 300 overlaps with two green sub-pixels 104G, two blue sub-pixels 104B, two red sub-pixels 104R, and two green sub-pixels 104G in order from the -X side. The group 302A of the light shielding member 300 blocks light emitted from the backlight 400 and incident on these sub-pixels 104.

[0151] As in Embodiment 2, the area of ​​the green sub-pixel 104G (four green sub-pixels 104G) shielded by the group 302A of the light shielding member 300, the area of ​​the blue sub-pixel 104B (two blue sub-pixels 104B) shielded by the group 302A of the light shielding member 300, and the area of ​​the red sub-pixel 104R (two red sub-pixels 104R) shielded by the group 302A of the light shielding member 300 are equal. That is, as in Embodiment 2, the group 302A of the light shielding member 300 of this embodiment also shields the sub-pixels 104 arranged continuously in the X direction equally for each color. In addition, in one second main pixel 202, the light shielding member 300 ( Fig.26 ) as a group to shade sub-pixels 104 equally for each color.

[0152] As described above, in the present embodiment, similarly, the groups 302A of the light shielding members 300 are arranged in a staggered manner in units of the groups 302A, and the sub-pixels 104 arranged continuously in the X direction are shielded equally for each color by the groups 302A of the light shielding members 300. As a result, the liquid crystal display device 10 can suppress color moiré. In addition, the light shielding members 300 located in the second main pixel 202 shield the sub-pixels 104 equally for each color as a group, whereby the liquid crystal display device 10 of the present embodiment can further suppress color moiré. In addition, the pixel electrode 250 is provided in each region 202A, whereby the liquid crystal display device 10 of the present embodiment can suppress the generation of dark spots that are easily visible to the observer.

[0153] Example 4

[0154] In Embodiments 1 to 3, the light shielding member 300 is formed of the switching element 240. The group 204A of Embodiment 1 is formed of two regions 202A, and the group 204A of Embodiments 2 and 3 is formed of four regions 202A.

[0155] However, a configuration in which the light shielding member 300 is formed of a dummy light shielding layer may be adopted. In addition, a configuration in which the group of regions 202A is a group formed of four regions 202A and a group formed of two regions 202A may be adopted. Hereinafter, a light shielding member formed of a dummy light shielding layer is referred to as a light shielding member 310.

[0156] Like the liquid crystal display device 10 of the first embodiment, the liquid crystal display device 10 of the present embodiment includes a panel 50, a backlight 400, and a display controller 500. The configurations of the switch elements 240 (light shielding members 300) and the like of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 are the same as those of the first embodiment. Thus, the arrangement of the dummy light shielding layer DM, the light shielding members 300 and 310, and the overlap of the light shielding members 300 and 310 with the sub-pixels 104 of the first liquid crystal display panel 100 are described below.

[0157] First, the dummy light shielding layer DM and the light shielding member 310 formed by the dummy light shielding layer DM are described. The dummy light shielding layer DM is formed of a light shielding metal, a light shielding organic material, etc. In one example, Fig. 27 As shown, the dummy light shielding layer DM is formed on the main surface 210 a of the second TFT substrate 210 .

[0158] When viewed from above from the observer side, the dummy light shielding layer DM serves as a light shielding member that blocks light emitted from the backlight 400 and incident on the sub-pixel 104 of the first liquid crystal display panel 100. Fig.28 As shown, the light blocking member 310 formed of the dummy light blocking layer DM has the same outer shape as the light blocking member 300 .

[0159] Next, the arrangement of the light shielding members 300 and 310 and the overlap of the light shielding members 300 and 310 with the sub-pixels 104 of the first liquid crystal display panel 100 are described.

[0160] As in Embodiment 1, in this embodiment, one second primary pixel 202 corresponds to 16 first primary pixels 102 in four rows and four columns in the X direction and the Y direction. Fig.29 and Fig.30 As shown, the second main pixel 202 of this embodiment is divided into 12 regions 202A of four rows and three columns in the X direction and the Y direction. Each region 202A corresponds to four sub-pixels 104 arranged in the X direction.

[0161] In the present embodiment, four adjacent regions 202A in two rows and two columns in the X direction and the Y direction form a group 204A. Four light shielding members 300 are located in the group 204A of regions 202A.

[0162] Two regions 202A adjacent to each other in the Y direction form a group 204B. Two light shielding members 300 and two light shielding members 310 are located in the group 204B of the region 202A.

[0163] The group 204A of the region 202A and the group 204B of the region 202A are each arranged in the Y direction, and the rows in the Y direction of the group 204A and the rows in the Y direction of the group 204B are arranged in an alternating manner in the X direction. In the rows in the Y direction of the group 204A and the rows in the Y direction of the group 204B, the positions of the group 204A of the region 202A and the group 204B of the region 202A are shifted in the Y direction by an amount corresponding to one region 202A. Note that the group 204A of the region 202A corresponds to the first group, and the group 204B of the region 202A corresponds to the second group. The rows in the Y direction of the group 204A of the region 202A correspond to the first row, and the rows in the Y direction of the group 204B of the region 202A correspond to the second row.

[0164] The four light shielding members 300 located in the group 204A of the region 202A form a group 302A. The four light shielding members 300 forming the group 302A of the light shielding members 300 are arranged in a row in the X direction and are arranged close to each other. The light shielding members 300 forming the group 302A correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the four regions 202A of the group 204A forming the region 202A.

[0165] The two light shielding members 300 and the two light shielding members 310 located in the group 204B of the region 202A form a group 302B. The four light shielding members (two light shielding members 300 and two light shielding members 310) forming the group 302B of the light shielding members 300 and 310 are arranged in a row in the X direction and are arranged close to each other. The light shielding members 300 forming the group 302B correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the two regions 202A of the group 204B forming the region 202A. The light shielding members 310 forming the group 302B are light shielding members formed by the dummy light shielding layer DM.

[0166] like Fig.29 As shown, it is preferred that the groups 302A of the light shielding members 300 are arranged at intervals of three times the width of the region 202A in the X direction, and are arranged at intervals of two times the width of the region 202A in the Y direction in the Y direction. In the row of the group 204A in the Y direction and the row of the group 204B in the Y direction, the positions of the group 204A and the group 204B are offset in the Y direction by an amount corresponding to one region 202A. Thus, the arrangement of the groups of light shielding members (group 302A and group 302B) is a staggered arrangement offset by half a pitch in the X direction and the Y direction.

[0167] like Fig.29 and Fig.30 As shown, the group 302A of the light shielding member 300 overlaps with 8 sub-pixels 104 of 2 rows and 4 columns in the X direction and the Y direction, and blocks the light incident on these sub-pixels 104. The group 302A of the light shielding member 300 overlaps with two green sub-pixels 104G, two blue sub-pixels 104B, two red sub-pixels 104R, and two green sub-pixels 104G in sequence from the -X side. The group 302A of the light shielding member 300 blocks the light emitted from the backlight 400 and incident on these sub-pixels 104.

[0168] The group 302B of the light shielding members 300 and 310 also overlaps with eight sub-pixels 104 of two rows and four columns in the X direction and the Y direction, and blocks light incident on these sub-pixels 104. The group 302B of the light shielding members 300 and 310 also overlaps with two green sub-pixels 104G, two blue sub-pixels 104B, two red sub-pixels 104R, and two green sub-pixels 104G in sequence from the -X side. The group 302B of the light shielding members 300 blocks light emitted from the backlight 400 and incident on these sub-pixels 104.

[0169] As in Example 2, the area of ​​the green sub-pixel 104G (four green sub-pixels 104G) shielded by the group of light shielding members (group 302A and group 302B), the area of ​​the blue sub-pixel 104B (two blue sub-pixels 104B) shielded by the group of light shielding members, and the area of ​​the red sub-pixel 104R (two red sub-pixels 104R) shielded by the group of light shielding members are equal. That is, as in Example 2, the group 302A of the light shielding members 300 and the group 302B of the light shielding members 300 and 310 shield the sub-pixels 104 arranged continuously in the X direction equally for each color. In addition, in one second main pixel 202, the light shielding members 300, 310 ( Fig.30 ) as a group to shade sub-pixels 104 equally for each color.

[0170] As described above, in the present embodiment, the groups of light shielding members (group 302A and group 302B) are arranged in a staggered manner in units of groups, and for each color, the sub-pixels 104 arranged continuously in the X direction are equally shielded by the group 302A of the light shielding members 300 and the group 302B of the light shielding members 300 and 310. Therefore, the liquid crystal display device 10 can suppress color moiré. In addition, the light shielding members 300 and 310 located in the second main pixel 202 shield the sub-pixels 104 equally for each color as a group, whereby the liquid crystal display device 10 of the present embodiment can further suppress color moiré. In addition, the pixel electrode 250 is provided in each region 202A, whereby the liquid crystal display device 10 of the present embodiment can suppress the generation of dark spots that are easily visible to the observer.

[0171] Example 5

[0172] In Embodiments 1 to 4, the light shielding members 300, 310 forming a group are arranged close to each other, and the light shielding members 300, 310 are arranged in a staggered manner in units of groups. In addition, the group 302A of the light shielding members 300 and the group 302B of the light shielding members 300, 310 equally shield the sub-pixels 104 arranged continuously in the X direction for each color.

[0173] However, a configuration may be adopted in which each of the light shielding members 300, 310 is arranged in a staggered manner. In addition, a configuration may be adopted in which a group of light shielding member groups 300, 310 shields each sub-pixel 104 in a row of sub-pixels 104 of the same color arranged consecutively (a row of red sub-pixels 104R, a row of green sub-pixels 104G, and a row of blue sub-pixels 104B) equally for each color.

[0174] Like the liquid crystal display device 10 of Embodiment 1, the liquid crystal display device 10 of this embodiment includes a panel 50, a backlight 400, and a display controller 500. The configurations of the switch element 240 (light shielding member 300) and the like of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 are the same as those of Embodiment 1. Thus, the arrangement of the light shielding member 300 and the overlap of the light shielding member 300 with the sub-pixel 104 of the first liquid crystal display panel 100 are described below.

[0175] As in Embodiment 1, in this embodiment, one second primary pixel 202 corresponds to 16 first primary pixels 102 in four rows and four columns in the X direction and the Y direction. Fig.31 As shown, the second primary pixel 202 of this embodiment is divided into four regions 202A in two rows and two columns in the X direction and the Y direction. Each region 202A corresponds to four first primary pixels 102 in two rows and two columns in the X direction and the Y direction.

[0176] In the present embodiment, two regions 202A adjacent in the Y direction form a group 204A. The group 204A of the region 202A is arranged in a matrix in the X direction and the Y direction. Two light shielding members 300 are located in the group 204A of the region 202A. The light shielding member 300 corresponds to the switching element 240 connected to the pixel electrode 250 in each of the two regions 202A arranged in the group 204A forming the region 202A.

[0177] The two light shielding members 300 within the group 204A of the area 202A are arranged offset in the X direction in each of the two areas 202A. Therefore, the light shielding members 300 are arranged one by one in a staggered manner.

[0178] The two light shielding members 300 within the group 204A of the region 202A form a group 302A. The group 302A of the light shielding members 300 shields each sub-pixel 104 in the continuously arranged rows SL of the same color sub-pixels 104 equally for each color as a group. Specifically, the group 302A of the light shielding members 300 overlaps each sub-pixel 104 in the row SL of the red sub-pixel 104R, the row SL of the green sub-pixel 104G, the row SL of the blue sub-pixel 104B, and the row SL of the red sub-pixel 104R (these rows SL are continuously arranged from the -X side), and blocks the light incident on these sub-pixels 104 from the backlight.

[0179] The area of ​​the two red sub-pixels 104R shielded by the group 302A of the light shielding member 300, the area of ​​the green sub-pixel 104G shielded by the group 302A of the light shielding member 300, and the area of ​​the blue sub-pixel 104B shielded by the group 302A of the light shielding member 300 are equal. Therefore, when the group 204A in which the regions 202A are arranged in the Y direction is viewed as a unit, the sub-pixels 104 of a specific color are not periodically shielded. Since the sub-pixels 104 of a specific color are not periodically shielded, the liquid crystal display device 10 can suppress color moiré.

[0180] Furthermore, in one second main pixel 202, four light shielding members 300 located in the second main pixel 202 shield the sub-pixels 104 equally for each color as a group of four. Therefore, the liquid crystal display device 10 can further suppress color moiré.

[0181] Specifically, if Fig.32 As shown, in the present embodiment, the shading rate SH changes little with respect to the angle θ of the viewing direction. Therefore, when a shift occurs in the overlap of 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 a diagonal direction, the four shading members 300 can substantially equally shield the sub-pixels 104 of different colors for each color, so that the liquid crystal display device 10 can suppress color moiré.

[0182] As described above, in this embodiment, the liquid crystal display device 10 can also suppress color moiré. In addition, the pixel electrode 250 is provided in each region 202A, thereby suppressing the generation of dark spots that are easily visible to the observer.

[0183] Example 6

[0184] In Embodiment 5, the group 302A of light shielding members 300 shields each sub-pixel 104 in the continuously arranged rows SL of the same color sub-pixels 104 as a group and equally for each color. However, a configuration may be adopted in which the light shielding members 300 arranged one by one in a staggered manner shield the sub-pixels 104 equally for each color as a group.

[0185] Like the liquid crystal display device 10 of Embodiment 1, the liquid crystal display device 10 of this embodiment includes a panel 50, a backlight 400, and a display controller 500. The configurations of the switch element 240 (light shielding member 300) and the like of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 are the same as those of Embodiment 1. Thus, the arrangement of the light shielding member 300 and the overlap of the light shielding member 300 with the sub-pixel 104 of the first liquid crystal display panel 100 are described below.

[0186] In this embodiment, if Fig.33 As shown, one second primary pixel 202 corresponds to 24 first primary pixels 102 arranged in six rows and four columns in the X direction and the Y direction. In this embodiment, the second primary pixel 202 is divided into six regions 202A in two rows and three columns in the X direction and the Y direction. Each region 202A corresponds to twelve sub-pixels 104 in three rows and four columns in the X direction and the Y direction.

[0187] In the present embodiment, three regions 202A adjacent in the X direction form a group 204A. The group 204A of the region 202A is arranged in a matrix in the X direction and the Y direction. Three light shielding members 300 are located in the group 204A of the region 202A, and the three light shielding members 300 form a group 302A. The three light shielding members 300 correspond to the switching elements 240 connected to the pixel electrodes 250 in each of the three regions 202A arranged in the group 204A forming the region 202A.

[0188] In the present embodiment, the light shielding members 300 are arranged one by one in a staggered manner, and in the region 202A located on the -X side of the group 204A (hereinafter referred to as "region 202A1"), the light shielding member 300 overlaps with the red sub-pixel 104R and the green sub-pixel 104G located on the -X side in the first row. In addition, in the region 202A located at the center of the group 204A (hereinafter referred to as "region 202A2"), the light shielding member 300 overlaps with the green sub-pixel 104G and the blue sub-pixel 104B located on the -X side in the second row. In addition, in the region 202A located on the +X side of the group 204A (hereinafter referred to as "region 202A3"), the light shielding member 300 overlaps with the blue sub-pixel 104B and the red sub-pixel 104R located on the -X side in the third row.

[0189] That is, the group 302A of the light shielding members 300 of the present embodiment blocks light incident on the sub-pixels 104 corresponding to the group 204A of the region 202A equally for each color as a group. Specifically, the sum of the area of ​​the red sub-pixel 104R shielded by the light shielding member 300 located in the region 202A1 and the area of ​​the red sub-pixel 104R shielded by the light shielding member 300 located in the region 202A3, the sum of the area of ​​the green sub-pixel 104G shielded by the light shielding member 300 located in the region 202A1 and the area of ​​the green sub-pixel 104G shielded by the light shielding member 300 located in the region 202A2, and the sum of the area of ​​the blue sub-pixel 104B shielded by the light shielding member 300 located in the region 202A2 and the area of ​​the blue sub-pixel 104B shielded by the light shielding member 300 located in the region 202A3 are equal. Therefore, when the group 204A in which the regions 202A are arranged in the X direction is viewed as a unit, the sub-pixels 104 of a specific color are not periodically shielded. Since the sub-pixels 104 of a specific color are not periodically shielded, the liquid crystal display device 10 can suppress color moiré.

[0190] In addition, similarly, in this embodiment, the six light shielding members 300 located in the second main pixel 202 form a group of six to equally shield the sub-pixels 104 for each color. Therefore, the liquid crystal display device 10 can further suppress color moiré.

[0191] As described above, in this embodiment, the liquid crystal display device 10 can also suppress color moiré. In addition, the pixel electrode 250 is provided in each region 202A, thereby suppressing the generation of dark spots that are easily visible to the observer.

[0192] Example 7

[0193] In Embodiment 1, the scan 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. However, a configuration may be adopted in which the scan lines GL and the signal lines DL of the second liquid crystal display panel 200 are bent. In addition, a configuration may be adopted in which the scan lines GL and the signal lines DL of the second liquid crystal display panel 200 form a light shielding pattern.

[0194] Like the liquid crystal display device 10 of Example 1, the liquid crystal display device 10 of this embodiment includes a panel 50, a backlight 400, and a display controller 500. The configurations of the switch element 240 (light shielding member 300) and the like of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 are the same as those of Example 1. In addition, the configuration of the light shielding member 300, and the overlap of the light shielding member 300 with the sub-pixel 104 of the first liquid crystal display panel 100 are the same as those of Example 1. Thus, the following describes the overlap of the scanning line GL and the signal line DL of the second liquid crystal display panel 200, and the scanning line GL and the signal line DL (light shielding pattern) with the first main pixel 102 (sub-pixel 104) of the first liquid crystal display panel 100.

[0195] First, the scanning line GL is described. The scanning line GL has a light shielding property and is formed of a metal (aluminum (Al), molybdenum (Mo), etc.). Fig.34 and Fig.35 As shown, the scan lines GL extend in the X direction and are arranged in the Y direction. In addition, a pair of adjacent scan lines GL form a light-shielding first light-shielding pattern 260 extending in the X direction. The first light-shielding pattern 260 is repeatedly arranged in the Y direction and blocks light emitted from the backlight 400 and incident on the first main pixel 102 (sub-pixel 104). Note that for ease of understanding, Fig.34 The scanning lines GL are shown by solid lines, and the signal lines DL are shown by dotted lines.

[0196] like Fig.35 As shown, one of the pair of adjacent scanning lines GL (hereinafter also referred to as "first light shielding line 262") includes a first inclined portion 262a, a second inclined portion 262b and a first flat portion 262c. The first inclined portion 262a is inclined at an acute angle in the clockwise direction relative to the +X direction, and the second inclined portion 262b is inclined at an acute angle in the direction opposite to the first inclined portion 262a (counterclockwise direction) relative 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 to each other.

[0197] The other scanning line GL (hereinafter also referred to as "second light shielding line 264") of the pair of adjacent scanning lines GL has line symmetry with the one scanning line GL (first light shielding line 262) in the X direction, and includes a third inclined portion 264a, a fourth inclined portion 264b, and a second flat portion 264c. The third inclined portion 264a is opposite to the first inclined portion 262a of the first light shielding line 262, and is inclined at an acute angle in the counterclockwise direction relative to the +X direction. The fourth inclined portion 264b is opposite to the second inclined portion 262b of the first light shielding line 262, and is inclined at an acute angle in the direction opposite to the third inclined portion 264a (clockwise direction) relative to the +X direction. The second flat portion 264c extends parallel to the X direction, is opposite to 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 to each other.

[0198] The first light shielding line 262 includes a first inclined portion 262a and a second inclined portion 262b, the first inclined portion 262a is inclined at an acute angle in the clockwise direction relative to the +X direction, the second inclined portion 262b is inclined at an acute angle in the direction opposite to the first inclined portion 262a relative 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 have a line symmetric relationship in the X direction. Therefore, as Fig.35 As shown, the interval between the first light shielding pattern 262 and the second light shielding pattern 264 changes continuously between the first inclined portion 262a of the first light shielding pattern 262 and the third inclined portion 264a of the second light shielding pattern 264 (interval L1), and changes continuously between the second inclined portion 262b of the first light shielding pattern 262 and the fourth inclined portion 264b of the second light shielding pattern 264 (interval L2). In addition, the intervals (interval L3 and interval L4) between the first flat portion 262c of the first light shielding pattern 262 and the second flat portion 264c of the second light shielding pattern 264 also change. Due to these configurations, even when the second liquid crystal display panel 200 is stacked on the first liquid crystal display panel 100, the spatial frequency interference between the second liquid crystal display panel 200 and the first liquid crystal display panel 100 can be suppressed, and the moiré of the liquid crystal display device 10 can be suppressed. Note that preferably, the period of the first light shielding pattern 260 is a natural number multiple of the width of the first main pixel 102 in the X direction.

[0199] Next, the signal line DL is described. Like the scanning line GL, the signal line DL has a light shielding property and is formed of a metal (aluminum (Al), molybdenum (Mo), etc.). Fig.34 and Fig.35As shown, 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 form a light-shielding second light-shielding pattern 270 extending in the Y direction. The second light-shielding pattern 270 is repeatedly arranged in the X direction and blocks light emitted from the backlight 400 and incident on the first main pixel 102 (sub-pixel 104).

[0200] like Fig.35 As shown, one of the pair of adjacent signal lines DL (hereinafter also referred to as "third light shielding line 272") includes a fifth inclined portion 272a and a sixth inclined portion 272b. The fifth inclined portion 272a is inclined at an acute angle in the counterclockwise direction relative to the +Y direction. The sixth inclined portion 272b is inclined at an acute angle in the direction opposite to the fifth inclined portion 272a (clockwise direction) relative to the +Y direction.

[0201] The other signal line DL of the pair of adjacent signal lines DL (hereinafter also referred to as "the fourth light shielding line 274") has line symmetry with the one signal line DL (the third light shielding line 272) in the Y direction, and includes a seventh inclined portion 274a and an eighth inclined portion 274b. The seventh inclined portion 274a is opposite to the fifth inclined portion 272a of the third light shielding line 272, and is inclined at an acute angle in the clockwise direction relative to the +Y direction. The eighth inclined portion 274b is opposite to the sixth inclined portion 272b of the third light shielding line 272, and is inclined at an acute angle in the direction opposite to the seventh inclined portion 274a (counterclockwise direction) relative to the +Y direction. Note that the third light shielding line 272 and the fourth light shielding line 274 of the second light shielding pattern 270 correspond to the first light shielding line and the second light shielding line of the light shielding pattern, respectively, and the fifth inclined portion 272a and the sixth inclined portion 272b of the third light shielding line 272 correspond to the first inclined portion and the second inclined portion of the first light shielding line, respectively.

[0202] The third light shielding line 272 includes a fifth inclined portion 272a and a sixth inclined portion 272b, the fifth inclined portion 272a is inclined at an acute angle in the counterclockwise direction relative to the +Y direction, the sixth inclined portion 272b is inclined at an acute angle in the direction opposite to the fifth inclined portion 272a relative 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 have a line-symmetric relationship in the Y direction. Therefore, as Fig.35As shown, the interval L5 between the third light shielding pattern 272 and the fourth light shielding pattern 274 changes continuously. Due to these configurations, even when the second liquid crystal display panel 200 is stacked on the first liquid crystal display panel 100, the spatial frequency interference between the second liquid crystal display panel 200 and the first liquid crystal display panel 100 can be suppressed, and the moiré pattern of the liquid crystal display device 10 can be suppressed. Note that preferably, the period of the second light shielding pattern 270 is a natural number multiple of the Y-direction width of the sub-pixel 104.

[0203] Next, the overlap of the first light shielding pattern 260 and the second light shielding pattern 270 with the first main pixel 102 (sub-pixel 104) of the first liquid crystal display panel 100 is described. Fig.34 As shown, in the first light shielding pattern 260 extending in the X direction, 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 and blue sub-pixel 104B) of the first liquid crystal display panel 100. Therefore, the brightness of the sub-pixel 104 overlapping with the first light shielding pattern 260 is slightly reduced, and the first main pixel 102 including the sub-pixel 104 overlapping with the first light shielding pattern 260 presents a color slightly different from the color to be displayed. However, the sub-pixel 104 in which the same level of brightness reduction occurs is nearby, whereby the brightness of the sub-pixel 104 is averaged for the observer who is observing the liquid crystal display device 10, and the observer recognizes the brightness of the plurality of sub-pixels 104 with reduced brightness as the same brightness grayscale. Therefore, in the overall display of the liquid crystal display device 10, it is possible to suppress the observer from recognizing color moiré.

[0204] 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 and blue sub-pixel 104B) of the first liquid crystal display panel 100. Therefore, as with the first light shielding pattern 260, the first main pixel 102 including the sub-pixel 104 overlapping the second light shielding pattern 270 presents a color slightly different from the color to be displayed. However, the color of the first main pixel 102 including the sub-pixel 104 overlapping the second light shielding pattern 270 is recognized by the observer as a different color from the color of the first main pixel 102 located near the first main pixel 102 including the sub-pixel 104 overlapping the second light shielding pattern 270, and the saturation of the mixed color is also reduced. As a result, in the overall display of the liquid crystal display device 10, it is possible to suppress the observer from recognizing color moiré.

[0205] As described above, the first light shielding pattern (scanning line GL) of the second liquid crystal display panel 200 is formed by a first light shielding line 262 and a second light shielding line 264 having line symmetry with the first light shielding line 262 in the X direction, wherein the first light shielding line 262 includes a first inclined portion 262a inclined relative to the +X direction, a second inclined portion 262b inclined in the opposite direction to the first inclined portion 262a relative to the +X direction, and a first flat portion 262c connecting the first inclined portion 262a and the second inclined portion 262b to each other. Thus, spatial frequency interference between the first liquid crystal display panel 100 and the second liquid crystal display panel 200 can be suppressed, and moiré of the liquid crystal display device 10 can be suppressed. In addition, the occurrence of color moiré can be suppressed.

[0206] The second light shielding pattern (signal line DL) of the second liquid crystal display panel 200 is formed by a third light shielding line 272 and a fourth light shielding line 274 having line symmetry with the third light shielding line 272 in the Y direction, wherein the third light shielding line 272 includes a fifth inclined portion 272a inclined at an acute angle relative to the +Y direction, and a sixth inclined portion 272b inclined at an acute angle relative to the +Y direction in the direction opposite to the fifth inclined portion 272a. Thus, the spatial frequency interference between the first liquid crystal display panel 100 and the second liquid crystal display panel 200 can be suppressed, and the moiré of the liquid crystal display device 10 can be suppressed. The occurrence of color moiré can also be suppressed.

[0207] In this embodiment, as in Embodiment 1, the groups 302A of the light shielding members 300 are arranged in a staggered manner in units of the groups 302A, and the sub-pixels 104 arranged continuously in the X direction are shielded equally for each color by the groups 302A of the light shielding members 300. Therefore, the liquid crystal display device 10 can suppress color moiré. In addition, the four light shielding members 300 located in the second main pixel 202 shield the sub-pixels 104 equally for each color as a group of four, whereby the liquid crystal display device 10 can further suppress color moiré.

[0208] Example 8

[0209] It is sufficient that a plurality of light shielding members 300 located in the second main pixel 202 as a group equally shield the sub-pixel 104 for each color. The liquid crystal display device 10 of this embodiment is the same as the liquid crystal display device 10 of embodiment 2 except that the light shielding member 300 overlaps with the sub-pixel 104 of the first liquid crystal display panel 100. Thus,

[0210] Next, the overlap between the light shielding member 300 and the sub-pixel 104 of the first liquid crystal display panel 100 will be described.

[0211] In this embodiment, if Fig.36and Fig.37 As shown, the group 302A of the light shielding member 300 is arranged in a staggered manner and overlaps with eight sub-pixels 104 of 2 rows and 4 columns in the X direction and the Y direction. Specifically, the group 302A of the light shielding member 300 overlaps with two blue sub-pixels 104B, two red sub-pixels 104R, two green sub-pixels 104G, and two blue sub-pixels 104B in sequence from the -X side. The group 302A of the light shielding member 300 blocks the light emitted from the backlight 400 and incident on these sub-pixels 104.

[0212] The light shielding member 300a spans over two blue sub-pixels 104B arranged in the Y direction to block light incident on these sub-pixels 104. The light shielding member 300b blocks light incident on two red sub-pixels 104R arranged in the Y direction. The light shielding member 300c blocks light incident on two green sub-pixels 104G arranged in the Y direction. The light shielding member 300d spans over two blue sub-pixels 104B arranged in the Y direction to block light incident on these sub-pixels 104. Therefore, in the present embodiment, the group 302A of the light shielding members 300 does not equally shield the sub-pixels 104 arranged continuously in the X direction for each color.

[0213] However, the 12 light shielding members 300 ( Fig.37 ) shield the sub-pixels 104 equally for each color as a group of 12. Therefore, when a shift occurs in the overlap of 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 a diagonal direction, the 12 light shielding members 300 can shield the sub-pixels 104 of different colors substantially equally for each color as a group of 12.

[0214] Specifically, if Fig.38 As shown, in the present embodiment, the change in the light shielding rate SH with respect to the angle θ of the viewing direction is small in the sub-pixel 104 of each color. Therefore, when a shift occurs in the overlap of 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 a diagonal direction, the 12 light shielding members 300 can substantially equally shield the sub-pixels 104 of different colors for each color, so that the liquid crystal display device 10 can suppress color moiré.

[0215] As described above, the 12 light shielding members 300 located in the second main pixel 202 shield the sub-pixel 104 equally for each color as a group of 12, thereby, the liquid crystal display device 10 of this embodiment can suppress color moiré. In addition, the pixel electrode 250 is provided in each area 202A, thereby, the liquid crystal display device 10 of this embodiment can suppress the generation of dark spots that are easily visible to the observer.

[0216] Modification example

[0217] The embodiments have been described, but various modifications may be made to the present disclosure without departing from the spirit and scope of the present invention.

[0218] In various embodiments, the first liquid crystal display panel 100 and the second liquid crystal display panel 200 are operated using a lateral electric field method. However, any operation method may be used for the first liquid crystal display panel 100 and the second liquid crystal display panel 200.

[0219] In the present embodiment, the first polarizing plate 132 of the first liquid crystal display panel 100 also serves as a polarizing plate on the light emitting side of the second liquid crystal display panel 200. However, a configuration in which the second liquid crystal display panel 200 includes a polarizing plate on the major surface 220b of the second counter substrate 220 may be adopted.

[0220] In the present embodiment, each sub-pixel 104 of the first liquid crystal display panel 100 has a rectangular shape. However, the shape of the sub-pixel 104 can be determined as needed. A configuration in which each sub-pixel 104 has a V-shape can be adopted. For example, a configuration in which each sub-pixel 104 has a V-shape when the sub-pixel 104 has a multi-domain structure can be adopted.

[0221] A configuration may be adopted in which, when the pixel electrode of the sub-pixel 104 is tilted relative to the Y direction, the comb teeth of the pixel electrode 250 of the second liquid crystal display panel 200 are tilted relative to the Y direction according to the tilt of the pixel electrode of the sub-pixel 104 .

[0222] like Fig.39 As shown, a configuration may be adopted in which each switching element 240 of the second liquid crystal display panel 200 includes a U-shaped source electrode 246. In this case, the light shielding member 300 formed by each switching element 240 has Fig.40 The appearance shown.

[0223] A configuration in which each switch element 240 of the second liquid crystal display panel 200 includes a light shielding film that blocks external light or incident light from a backlight may be adopted. When the switch element 240 includes the light shielding film, the outer shape of each light shielding member 300 formed by the switch element 240 is determined to include the light shielding film. In this specification, the outer shape of the light shielding members 300, 310 is determined by the configuration of the switch element 240.

[0224] In Embodiment 1, one light shielding member 300 overlaps with sub-pixels 104 of two colors and blocks light incident on the sub-pixels 104 of the two colors. In other embodiments, one light shielding member 300 or 310 overlaps with sub-pixels 104 of one or two colors and blocks light incident on the sub-pixels 104 of one or two colors. However, a configuration may be adopted in which one light shielding member 300, 310 overlaps with sub-pixels 104 of three colors and blocks light incident on the sub-pixels 104 of the three colors.

[0225] In Embodiment 4, the dummy light shielding layer DM is formed on the main surface 210a of the second TFT substrate 210. However, the position where the dummy light shielding layer DM is formed can be determined as needed. For example, a configuration in which the dummy light shielding layer DM is formed on the second opposing substrate 220 can be adopted.

[0226] In Embodiment 4, the light shielding members 300 and the light shielding members 310 of the group 302B are arranged in the order of the light shielding members 300, the light shielding members 310, the light shielding members 310, and the light shielding members 300 (i.e., two light shielding members 300 sandwich two light shielding members 310) in the X direction. However, a configuration may be adopted in which, in the group 302B, the light shielding members 300 and the light shielding members 310 are arranged in the order of the light shielding members 300, the light shielding members 300, the light shielding members 310, and the light shielding members 310 in the X direction. In addition, a configuration may be adopted in which the group 302B arranged in the order of the light shielding members 300, the light shielding members 310, the light shielding members 310, and the light shielding members 300, and the group 302B arranged in the order of the light shielding members 300, the light shielding members 300, the light shielding members 310, and the light shielding members 310 are arranged in the Y direction in an alternating manner.

[0227] In Embodiments 1 to 4, 6 and 7, two or four light shielding members 300, 310 forming groups 302A, 302B are arranged in a row in the X direction. However, the arrangement of the light shielding members 300, 310 is not limited to one row (one column). For example, a configuration such as Fig.41 As shown, the four shading members 300 forming the group 302A are arranged in two rows and two columns. Fig.42 As shown, the position of the light blocking member 300 is shifted between the first row and the second row.

[0228] The number of first main pixels 102 of the first liquid crystal display panel 100 corresponding to one second main pixel 202 of the second liquid crystal display panel 200 can be set as needed. In addition, the number of divisions of one second main pixel 202 of the second liquid crystal display panel 200 into a plurality of regions 202A can be set as needed. From the perspective of resolution, complexity of wiring, suppression of the occurrence of dark spots, etc., it is preferred that the size of the second main pixel 202 is approximately 500μm×500μm, and the size of each region 202A is 250μm×250μm or less. In addition, it is preferred that the number of divisions of each second main pixel 202 is from 4 to 16.

[0229] In the present embodiment, the second main pixel 202 of the second liquid crystal display panel 200 has a rectangular shape. However, the shape of the second main pixel 202 can be determined as needed. For example, Fig.43 As shown, a configuration in which the second main pixel 202 has a non-rectangular shape may be adopted. In this case, by assuming a virtual area 202S having a rectangular shape, the light shielding member 300 may be arranged as in the embodiment.

[0230] In the embodiment 5 in which the light shielding members 300 are arranged one by one 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 direction and the Y direction. When the light shielding members 300 are arranged one by one in a staggered manner, the number of divisions of the second main pixel 202 can also be set as needed. For example, Fig.44 As shown, a configuration may be adopted in which the second main pixel 202 is divided into 12 regions 202A of 4 rows and 3 columns in the X direction and the Y direction. Also in this case, the group 302A of the light shielding member 300 shields each sub-pixel 104 in the row SL of the sub-pixels 104 of the same color arranged continuously as a group and equally for each color. Also, in this modified example, as Fig.45 As shown, the shading rate SH changes little with respect to the angle θ of the viewing direction. Therefore, when a shift occurs in the overlap of 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 a diagonal direction, the shading member 300 of the second main pixel 202 can substantially equally shield the sub-pixels 104 of different colors for each color, and the liquid crystal display device 10 can suppress color moiré.

[0231] In Embodiment 7, the second liquid crystal display panel 200 includes the first light-shielding pattern 260 and the second light-shielding pattern 270 . However, 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 .

[0232] In addition, the first light-shielding line 262 of the first light-shielding pattern 260 includes a first flat portion 262c, and the second light-shielding line 264 of the first light-shielding pattern 260 includes a second flat portion 264c. However, a configuration may be adopted in which the first light-shielding line 262 does not include the first flat portion 262c, and the second light-shielding line 264 does not include the second flat portion 264c. That is, a configuration may be adopted in which the first light-shielding line 262 and the second light-shielding line 264 have a line-symmetric relationship in the X direction and each extends in a zigzag shape in the X direction.

[0233] Meanwhile, a configuration may be adopted in which the third light-shielding line 272 of the second light-shielding pattern 270 includes a third flat portion that connects the fifth inclined portion 272a and the sixth inclined portion 272b to each other and extends parallel to the Y direction. In addition, a configuration may be adopted in which the fourth light-shielding line 274 of the second light-shielding pattern 270 includes a fourth flat portion that connects the seventh inclined portion 274a and the eighth inclined portion 274b to each other and extends parallel to the Y direction.

[0234] A configuration may be adopted in which the second liquid crystal display panel 200 of Embodiments 2 to 8 and the modified example includes at least one of the first light-shielding pattern 260 and the second light-shielding pattern 270 .

[0235] Some example embodiments have been described above for purposes of explanation. Although the foregoing discussion has given specific embodiments, those skilled in the art will recognize that changes may be made in form and detail without departing from the broader spirit and scope of the invention. Therefore, the specification and drawings are to be regarded as illustrative rather than restrictive. Therefore, this detailed description is not limiting, and the scope of the present invention is limited only by the claims included therein and the full range of equivalents to which such claims are entitled.

Claims

1. A liquid crystal display device, comprising: a first liquid crystal display panel, in which first main pixels including a plurality of sub-pixels of different colors are arranged in a matrix in a predetermined first direction and in a predetermined second direction perpendicular to the predetermined first direction, and the first liquid crystal display panel displays a color image; as well as a second liquid crystal display panel, which is located on a side of the first liquid crystal display panel opposite to the observer-side surface and overlaps the first liquid crystal display panel, and includes second main pixels corresponding to a plurality of the first main pixels, and the second liquid crystal display panel displays a monochrome image, wherein The second main pixel is divided into a plurality of regions and has pixel electrodes arranged in the plurality of regions and a plurality of light shielding members. At least a portion of the plurality of light shielding members is formed by a switching element connected to each of the pixel electrodes, The plurality of shading elements are arranged in a staggered manner, The light shielding members located in a group of regions formed by regions adjacent to each other form a group of light shielding members, and The set of light shielding members blocks light incident on the sub-pixels equally for each color.

2. The liquid crystal display device according to claim 1, wherein The set of light shielding members equally blocks light incident on the sub-pixels arranged in series for each color, and The plurality of light shielding members are arranged in a staggered manner in units of the group of light shielding members.

3. The liquid crystal display device according to claim 2, wherein: The plurality of light shielding members located within the second main pixel equally blocks light incident on the sub-pixels for each color.

4. The liquid crystal display device according to claim 2, wherein The regions form a first group consisting of regions arranged in two rows and two columns in the predetermined first direction and the predetermined second direction, and a second group consisting of two regions arranged in the predetermined second direction, a first row and a second row are arranged in an alternating manner in the predetermined first direction, in the first row, the first groups are arranged in the predetermined second direction, and in the second row, the second groups are arranged in the predetermined second direction to be shifted relative to the first row by an amount corresponding to one of the regions, In the first group of regions, the group of light shielding members is formed by arranging four light shielding members formed by the switching elements in the predetermined first direction, and In the second group area, the group of light shielding members is formed by arranging two light shielding members formed by the switching elements and two light shielding members formed by dummy light shielding layers in the predetermined first direction.

5. The liquid crystal display device according to claim 2, wherein: At least a portion of the plurality of light blocking members spans across a plurality of sub-pixels having mutually different colors and blocks light incident on the plurality of sub-pixels.

6. The liquid crystal display device according to claim 2, wherein The second liquid crystal display panel includes light shielding patterns which are repeatedly arranged and have light shielding properties, The light-shielding pattern extends in the predetermined first direction or the predetermined second direction and includes a first light-shielding line and a second light-shielding line, the first light-shielding line includes a first inclined portion inclined relative to the extending direction and a second inclined portion inclined relative to the extending direction in a direction opposite to the first inclined portion, the second light-shielding line is adjacent to the first light-shielding line and has line symmetry with the first light-shielding line in the extending direction, and The first light-shielding line and the second light-shielding line are formed by one selected from a scanning line and a signal line of the second liquid crystal display panel.

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