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 display a color image, and a second liquid crystal display panel including second main pixels corresponding to the plurality of first main pixels and displaying a monochrome image. The second main pixels are divided into a plurality of regions, and have pixel electrodes arranged in the plurality of regions, and a plurality of light shielding members. At least a part 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. Light shielding members located within a group of regions formed by adjacent regions form a group of light shielding members.

Description

[0001] Cross-reference to related applications

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

[0003] This application generally relates to liquid crystal display devices. Background Technology

[0004] In the prior art, it is known that liquid crystal display devices enhance contrast by stacking multiple liquid crystal panels. For example, unexamined Japanese Patent Application Publication No. 2021-535415 describes a display panel that includes a stacked optical control panel and display liquid crystal panels.

[0005] In Unexamined Japanese Patent Application Publication No. 2021-535415, a display liquid crystal panel performs a display function, and an optical control panel controls the light incident on the display liquid crystal panel from backlight. The optical control panel includes multiple signal lines (gate lines and data lines). At least a portion of the multiple signal lines are folded lines. In 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 folded 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 unexamined Japanese Patent Application Publication No. 2021-535415, the signal lines of the optical control panel are folded at a predetermined period. Therefore, the thin-film transistors of the optical control unit driving the optical control panel periodically block light incident on specific color sub-pixel units of the display liquid crystal panel, and thus, the brightness of the specific color sub-pixel units may periodically decrease. When the brightness of the specific color sub-pixel units periodically decreases, colored moiré patterns appear in the display panel.

[0007] This disclosure is made in view of the above circumstances, and the purpose of this disclosure is to provide a liquid crystal display device that suppresses color moiré patterns. Summary of the Invention

[0008] To achieve the above objectives, the liquid crystal display device according to the first aspect of this disclosure includes:

[0009] A first liquid crystal display panel, wherein first main pixels, including a plurality of sub-pixels of different colors, are arranged in a matrix in a predetermined first direction and 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 is located on the side of the first liquid crystal display panel opposite to the observer's side and overlaps the first liquid crystal display panel. It includes second main pixels corresponding to a plurality of first main pixels. The second liquid crystal display panel displays a monochrome image.

[0011] The second main pixel is divided into multiple regions and has pixel electrodes arranged in the multiple regions, as well as multiple light-shielding elements.

[0012] At least a portion of the plurality of light-shielding elements are formed by switching elements connected to each of the pixel electrodes, and the plurality of light-shielding elements are arranged in an alternating manner.

[0013] A set of light-blocking elements located within a set of adjacent regions form a set of light-blocking elements, and the set of light-blocking elements equally blocks light incident on the sub-pixel for each color.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative.

[0015] And this is not a limitation of this disclosure.

[0016] According to this disclosure, the set of light-blocking elements equally blocks light incident on the sub-pixels for each color, thus suppressing color moiré patterns on the light-blocking plate. Attached Figure Description

[0017] A more complete understanding of this application can be obtained by considering the following detailed description in conjunction with the accompanying drawings, wherein:

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

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

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

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

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

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

[0024] Figure 7 yes Figure 6 The cross-sectional view of the scan lines and signal lines shown is taken along line AA;

[0025] Figure 8 yes Figure 6 The cross-sectional view of the switching element and contact hole shown along line BB;

[0026] Figure 9 This is a plan view showing the switching element according to Embodiment 1;

[0027] Figure 10 This is a plan view showing the shape of the light-shielding member according to Embodiment 1;

[0028] Figure 11 This is a diagram illustrating the overlap of four second main pixels and sub-pixels according to Embodiment 1;

[0029] Figure 12 This is a diagram illustrating the overlap of a second main pixel and a sub-pixel according to Embodiment 1;

[0030] Figure 13 This is a diagram showing the overlap of the light-shielding element and the sub-pixel according to Embodiment 1;

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

[0032] Figure 15 This is an illustration showing an example of a unit image viewed diagonally according to Embodiment 1;

[0033] Figure 16 This is a diagram showing the viewing angle according to Embodiment 1;

[0034] Figure 17 This is a diagram showing the x and y values ​​in the evaluation image according to Example 1;

[0035] Figure 18 This is a diagram showing the shading rate according to Example 1;

[0036] Figure 19 This is a graph showing the shading rate based on a comparative example;

[0037] Figure 20 This is a diagram illustrating the overlap of the light-shielding element and sub-pixels according to a comparative example;

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

[0039] Figure 22 This is a diagram illustrating the overlap of four second main pixels and sub-pixels according to Embodiment 2;

[0040] Figure 23 This is a diagram illustrating the overlap of a second main pixel and a sub-pixel according to Embodiment 2;

[0041] Figure 24 This is a diagram showing the overlap of the light-shielding element and the sub-pixel according to Embodiment 2;

[0042] Figure 25 This is a diagram illustrating the overlap of the second main pixel and sub-pixels according to Embodiment 3;

[0043] Figure 26 This is a diagram illustrating the overlap of a second main pixel and a sub-pixel according to Embodiment 3;

[0044] Figure 27 This is a cross-sectional view of the dummy light-shielding layer according to Embodiment 4;

[0045] Figure 28 This is a plan view showing the shape of the light-shielding member formed by the dummy light-shielding layer according to Embodiment 4;

[0046] Figure 29 This is a diagram illustrating the overlap of the second main pixel and sub-pixels according to Embodiment 4;

[0047] Figure 30 This is a diagram illustrating the overlap of the second main pixel and sub-pixels according to Embodiment 4;

[0048] Figure 31 This is a diagram illustrating the overlap of the second main pixel and sub-pixels according to Embodiment 5;

[0049] Figure 32 This is a diagram showing the shading rate according to Example 5;

[0050] Figure 33 This is a diagram illustrating the overlap of the second main pixel and sub-pixels according to Embodiment 6;

[0051] Figure 34 This is a diagram illustrating the overlap of the second main pixel and sub-pixels according to Embodiment 7;

[0052] Figure 35 This is a diagram showing the first and second light-shielding patterns according to Embodiment 7;

[0053] Figure 36 This is a diagram illustrating the overlap of the second main pixel and sub-pixels according to Embodiment 8;

[0054] Figure 37 This is a diagram illustrating the overlap of the second main pixel and sub-pixels according to Embodiment 8;

[0055] Figure 38This is a diagram showing the shading rate according to Example 8;

[0056] Figure 39 This is a plan view showing the switching element according to the modified example;

[0057] Figure 40 This is a plan view showing the shape of the light shield according to the modified example;

[0058] Figure 41 This is a diagram showing the arrangement of the light-shielding elements according to the modified example;

[0059] Figure 42 This is a diagram showing the arrangement of the light-shielding elements according to the modified example;

[0060] Figure 43 This is a diagram showing the second primary pixel according to the modified example;

[0061] Figure 44 This is a diagram illustrating the overlap of the second primary pixel and sub-pixels according to the modified example; and

[0062] Figure 45 This is a diagram showing the shading rate based on the modified example. Specific Implementation

[0063] In the following description, 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 The liquid crystal display device 10 according to this embodiment is described. The liquid crystal display device 10 uses a first liquid crystal display panel 100 and a second liquid crystal display panel 200, which will be described later, to display color images.

[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 rightward direction (the rightward direction on the paper) is called the "+X direction", the upward direction (the upward direction on the paper) is called the "+Y direction", and the direction perpendicular to the +X direction and the +Y direction (the front direction on the paper) is called the "+Z direction".

[0067] panel

[0068] 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 of the first liquid crystal display panel 100 opposite to the observer side (the back side of the first liquid crystal display panel 100) and is superimposed on the first liquid crystal display panel 100. The second liquid crystal display panel 200 displays a monochrome image.

[0069] First LCD 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 thin-film transistors (TFTs).

[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 that emits red light, a green sub-pixel 104G that emits green light, and a blue sub-pixel 104B that emits blue light. The red sub-pixel 104R, the green sub-pixel 104G, and the blue sub-pixel 104B each have a rectangular shape and are arranged sequentially 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 opposing 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 opposing 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 opposing substrate 120.

[0073] In one example, the first TFT substrate 110 is implemented as a glass substrate. A TFT, a common electrode, a pixel electrode, an alignment film, etc. (not shown in the figures) are disposed on the main surface 110a of the first TFT substrate 110 on the side of the first liquid crystal 130. The TFT of the first TFT substrate 110 is provided for selecting the sub-pixel 104. The alignment film of the first TFT substrate 110 is aligned with the first liquid crystal 130.

[0074] Furthermore, multiple common lines, multiple scan lines, and multiple signal lines (not shown in the figures) are formed on the main surface 110a of the first TFT substrate 110. The common lines provide a common voltage to the common electrode that applies voltage to the first liquid crystal 130. The scan lines provide the voltage that enables the TFT to operate. The scan lines extend in the X direction. The signal lines provide voltage to the pixel electrode that applies voltage to the first liquid crystal 130 via the TFT. The signal lines extend in the Y direction. The sub-pixel 104 is surrounded by the signal lines and scan lines, and the TFT is disposed at the intersection between the scan lines and the signal lines. A first polarizing plate 132 is disposed 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 opposing substrate 120 is opposite to the first TFT substrate 110. The first opposing substrate 120 is attached to the first TFT substrate 110 by a sealing material 138. In one example, the first opposing substrate 120 is implemented as a glass substrate. A color filter 122, a black matrix BM, an alignment film, etc., are disposed on the main surface 120a of the first liquid crystal 130 side of the first opposing substrate 120.

[0076] In one example, color filter 122 is implemented as a striped color filter (where the stripes are in the Y direction), with color filters of the same color arranged in the Y direction. Each of the red, green, and blue color filters of color filter 122 is surrounded by a black matrix BM and corresponds to each of the red sub-pixels 104R, green sub-pixels 104G, and blue sub-pixels 104B. Figure 2 As shown, the black matrix BM defines each first main pixel 102 and each sub-pixel 104. An alignment film aligns with the first liquid crystal 130. A second polarizing plate 134 is disposed on the main surface 120b of the first opposing substrate 120, on the side opposite to the main surface 120a. Note that, for ease of understanding, in Figure 3 The black matrix (BM) and alignment membrane are omitted.

[0077] like Figure 3 As shown, the first liquid crystal 130 is sandwiched between the first TFT substrate 110 and the first opposing 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 an alignment film. In addition, due to the applied voltage, the first liquid crystal 130 rotates in a plane parallel to the main surface 110a of the first TFT substrate 110.

[0078] A first polarizing plate 132 is disposed on the main surface 110b of the first TFT substrate 110. A second polarizing plate 134 is disposed on the main surface 120b of the first opposing substrate 120. One of the transmission axes of the first polarizing plate 132 and the second polarizing plate 134 is arranged parallel to the alignment direction of the first liquid crystal 130. Furthermore, 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 opposing substrate 220 of the second liquid crystal display panel 200 (described later) via 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 disposed on the main surface 110a of the first TFT substrate 110. The first driver circuit 136 provides voltage to the scan lines, signal lines and common lines based on the color image signal provided from the display controller 500.

[0080] Second LCD 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 via 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 the switching element 240, which will be described later. Figure 4 As shown, the second liquid crystal display panel 200 includes second main pixels 202 arranged in a matrix. 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... Figure 4 The scan line GL and signal line DL are shown as dashed lines. In the following figures, the scan line GL and signal line DL may be shown as dashed 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 also serves as a polarizing plate on the light emitting side of the second liquid crystal display panel 200. The second liquid crystal display panel 200 does not have a color filter and a black matrix.

[0084] In one example, the second TFT substrate 210 is implemented as a glass substrate. A common line (not shown), multiple scan lines GL, multiple signal lines DL, an alignment film (not shown), and switching elements 240, pixel electrodes 250, a common electrode CE, and a light-shielding member 300 for the second main pixel 202 are formed on the main surface 210a of the second TFT substrate 210 on the side of the second liquid crystal 230. The common line provides a common voltage to the common electrode CE, which applies voltage to the second liquid crystal 230. The scan lines GL provide a voltage that enables the switching elements 240 to operate. The signal lines DL provide voltage to the pixel electrodes 250, which apply voltage to the second liquid crystal 230, via the switching elements 240. The alignment film aligns with the second liquid crystal 230. A third polarizer 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 this embodiment, the light-shielding element 300 of the second main pixel 202 is formed by a switching element 240. The configuration of the second main pixel 202, scan line GL, 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 via 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 with the second liquid crystal 230 is provided on the main surface 220a of the second opposing substrate 220 on the side opposite to the main surface 220a. An adhesive layer 150 is provided on the main surface 220b of the second opposing substrate 220 on the side opposite to the main surface 220a. 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 an alignment film. Due to the application of 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 polarizer 232 is disposed on the main surface 210b of the second TFT substrate 210. The transmission axis of the third polarizer 232 is arranged parallel to the alignment direction of the second liquid crystal 230. The transmission axis of the third polarizer 232 and the transmission axis of the first polarizer 132 of the first liquid crystal display panel 100 (the polarizer on the light emitting side of the second liquid crystal display panel 200) are orthogonal to each other, and the second liquid crystal display panel 200 operates in a normally black mode.

[0089] The second driver circuit 236 is disposed on the main surface 210a of the second TFT substrate 210. The second driver circuit 236 provides voltage to the scan line GL, the signal line DL, and the common line based on the signal provided from the display controller 500.

[0090] Reference Figures 4 to 8 Describe the configuration of scan line GL, signal line DL, and second main pixel 202. Figure 5 This is a plan view showing the second main pixel 202. Figure 6 This is a plan view showing region 202A of the second primary pixel 202. Figure 7 yes Figure 6 The image shows a cross-sectional view of the scan line GL and the signal line DL taken along line AA. Figure 8 yes Figure 6 The cross-sectional view of the switch element 240 and the contact hole CH taken along line BB is shown. Figure 9 This is a plan view showing the switching element 240. For ease of understanding, from... Figure 5 , Figure 6 and Figure 9 The first insulating layer 282, the second insulating layer 284, etc. are omitted.

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

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

[0093] like Figures 4 to 6 As shown, signal line DL extends linearly in the Y direction. Signal line DL branches in the X direction and connects to switching element 240. (As shown...) 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 a third insulating layer 286.

[0095] like Figure 5 and Figure 6 As shown, each pixel electrode 250 of the second main pixel 202 has a comb-like 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 functions as a light-shielding member to block 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 Figure 9 As shown, each switching element 240 includes a gate 242, a semiconductor layer 244, a source 246, and a drain 248. In one example, the switching element 240 is implemented as a TFT element. Note that the arrangement of the switching element 240 (light shield 300) will be described later.

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

[0099] like Figure 7 and Figure 8 As shown, the first insulating layer 282 covers the scan line GL and the gate 242 of the switching element 240. The second insulating layer 284 covers the semiconductor layer 244, source 246, and drain 248 of the switching element 240, as well as 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 242, source 246, and drain 248 of each switching element 240 are formed of light-shielding metal. Thus, each switching element 240, including the contact portion 248a of the drain 248, serves as a light-shielding element to block light emitted from the backlight 400 and incident on the sub-pixels 104 of the first liquid crystal display panel 100. When viewed from above from the observer's side, the light-shielding element 300 formed by the switching elements 240 has… Figure 10 The shape shown.

[0101] In the following text, refer 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-pixels 104 of the first liquid crystal display panel 100 are described. Figure 11 The overlap of the four second main pixels 202 and sub-pixels 104 is shown. Figure 12 This shows the overlap of a second main pixel 202 and a sub-pixel 104. Figure 13 The overlap between the light-shielding element 300 and sub-pixel 104 is shown. Note that in Figures 11 to 13 The black matrix BM of the first liquid crystal display panel 100 is omitted in the accompanying drawings.

[0102] In this embodiment, as Figure 11 and 12As shown, one second main pixel 202 corresponds to 16 first main pixels 102 arranged in four rows and four columns in the X and Y directions. The second main pixels 202 are divided into four regions 202A in two rows and two columns in the X and Y directions. Each region 202A corresponds to four first main pixels 102 in two rows and two columns in the X and Y directions.

[0103] In this embodiment, two adjacent regions 202A in the X direction form a group 204A. Two light-shielding members 300 are located within the group 204A of regions 202A. Furthermore, in adjacent groups 204A in the Y direction, the position of the group 204A is offset in the X direction by an amount corresponding to that of a region 202A.

[0104] Furthermore, two light-shielding elements 300 located within group 204A of region 202A form a group 302A. The two light-shielding elements 300 forming group 302A are arranged close to each other. Figure 11 As shown, preferably, the groups 302A of the light-shielding members 300 are arranged at intervals twice the width of the region 202A in the X direction, and at intervals twice the width of the region 202A in the Y direction. In the groups 204A of adjacent regions 202A in the Y direction, the position of the group 204A is offset in the X direction by an amount corresponding to one region 202A. Thus, the arrangement of the light-shielding members 300 is an alternating arrangement with the groups 302A offset by half a spacing in both the X and Y directions. Note that each light-shielding member 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. Figure 5 This corresponds to two adjacent switching elements 240 located on the +Y side.

[0105] like Figures 11 to 13As shown, group 302A of the light-shielding member 300 overlaps with four sub-pixels 104 arranged consecutively in the X direction and blocks light incident on these sub-pixels 104. Specifically, group 302A of the light-shielding member 300 overlaps with four sub-pixels 104 arranged sequentially from the -X side in the order of green sub-pixel 104G, blue sub-pixel 104B, red sub-pixel 104R, and green sub-pixel 104G. Group 302A of the light-shielding member 300 blocks light emitted from the backlight 400 and incident on these sub-pixels 104. Among the light-shielding members 300 forming group 302A of the light-shielding member 300, the light-shielding member 300 located on the -X side spans 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. In each of the light-shielding members 300 in the group 302A forming the light-shielding member 300, the light-shielding member 300 located on the +X side spans 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 Figure 13 As shown, when S1 is the area of ​​the green sub-pixel 104G blocked by the light-blocking member 300 located on the -X side, S2 is the area of ​​the blue sub-pixel 104B blocked by the light-blocking member 300 located on the -X side, S3 is the area of ​​the red sub-pixel 104R blocked by the light-blocking member 300 located on the +X side, and S4 is the area of ​​the green sub-pixel 104G blocked by the light-blocking member 300 located on the +X side, the light-blocking member 300 located on the -X side and the light-blocking member 300 located on the +X side are arranged such that S1 + S4 = S2 = S3. Therefore, the area (S1+S4) of the green sub-pixel 104G (two green sub-pixels 104G) covered by group 302A of light-shielding member 300, the area (S2) of the blue sub-pixel 104B covered by group 302A of light-shielding member 300, and the area (S3) of the red sub-pixel 104R covered by group 302A of light-shielding member 300 are equal. That is, group 302A of light-shielding member 300 equally covers the sub-pixels 104 continuously arranged in the X direction for each color.

[0107] In this embodiment, the groups 302A of the light-shielding members 300 are arranged in an alternating manner in the X and Y directions, and for each color, the sub-pixels 104 arranged continuously in the X direction are equally blocked by the groups 302A of the light-shielding members 300. Therefore, the sub-pixels 104 of a specific color are not periodically blocked. Furthermore, for the entire display of the liquid crystal display device 10, the color difference caused by the blocked sub-pixels 104 is averaged out. Therefore, the liquid crystal display device 10 is able to suppress color moiré patterns.

[0108] Furthermore, in a second main pixel 202, four light-shielding elements 300 are located within the second main pixel 202. Figure 12 The four light-shielding elements 300, acting as a group of four, equally shield each sub-pixel 104 for each color. Therefore, when a shift occurs in the overlap between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or when the display of the liquid crystal display device 10 is viewed from a diagonal direction, these four light-shielding elements 300, acting as a group of four, can substantially equally shield the sub-pixels 104 of different colors for each color. Thus, the liquid crystal display device 10 is able to further suppress color moiré patterns.

[0109] The following describes how the suppression of color moiré patterns is achieved by the group 302A of the light-shielding member 300 shielding the sub-pixels 104 arranged continuously in the X direction for each color. In this specification, the 16 (four rows, four columns) first pixels 102 in the liquid crystal display device 10 have a size of 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 simulating the group 302A of 16 first principal pixels 102 and light-shielding member 300 viewed from the observer's side is created. The created unit images are the unit images of the group 302A of the 16 first principal pixels 102 and light-shielding member 300 viewed from the front, and the unit images of the group 302A of the 16 first principal pixels 102 and light-shielding member 300 viewed from the diagonal direction. Figure 14 The image shows a unit viewed from the front. Figure 15 An example of a unit image viewed from a diagonal direction is shown.

[0111] In a unit image viewed diagonally, considering the thickness and refractive index of the first liquid crystal display panel 100 and the second liquid crystal display panel 200, and according to the viewing angle θ (θ = 2.2°, 4.3°, 6.3°, 8.3°, 10.3°, 12.3°), the position of the group 302A of the light-shielding member 300 is offset 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. The viewing direction is from the front towards the -X side, and the angle θ is as follows: Figure 16 The angle shown is relative to the +Z direction (left rotation).

[0112] In a unit image, the colors of the red subpixel 104R, green subpixel 104G, and blue subpixel 104B are defined as their respective colors (red, green, and blue), and the brightness of the red subpixel 104R, green subpixel 104G, and blue subpixel 104B is defined as the brightness of the first main pixel 102 when it is displayed in white when viewed from the front. Additionally, the light-blocking element 300 is shown in black. Note that, for ease of understanding, the two light-blocking elements 300 that do not form group 302A within the second main pixels 202 corresponding to the 16 first main 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 (θ = 2.2°, 4.3°, 6.3°, 8.3°, 10.3°, 12.3°). Furthermore, RGB values ​​(8-bit, 0 to 255 levels) are obtained from the created evaluation images by averaging the entire evaluation image. Additionally, x and y values ​​in the CIE color space are calculated based on the obtained RGB luminance values. Figure 17 The x and y values ​​are shown in the evaluation image viewed from the front and the evaluation image viewed from the diagonal.

[0114] like Figure 17 As shown, the range of x and y values ​​varying with viewing direction is less than 0.01. In subjective evaluation, when the range of x and y values ​​is 0.01 or less, the observer cannot identify the colored moiré pattern or is not bothered by it.

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

[0116] Next, we describe the viewing angle θ and the shading rate SH of the light-blocking member 300. The shading rate SH of the light-blocking member 300 is the ratio of the area blocked by the four light-blocking members 300 located within a second main pixel 202 from the openings of the red sub-pixel 104R (16 sub-pixels), green sub-pixel 104G (16 sub-pixels), and blue sub-pixel 104B (16 sub-pixels) corresponding to that second main pixel 202, incident from the backlight 400. As described above, the position of the light-blocking member 300 relative to the sub-pixel 104 changes according to the viewing angle θ, and thus, the shading rate SH of the light-blocking member 300 changes according to the viewing angle θ.

[0117] Figure 18 The shading rate SH of this embodiment is shown. Figure 19 The shading rate SH is shown for a comparative example. For example... Figure 20 As shown, in the main pixel 700 of the comparative example, four light-blocking elements 300 are arranged in parallel rows in the X and Y directions.

[0118] First, describe the shading rate SH of the comparison examples. For example... Figure 19 As shown, as the viewing angle gradually transitions from the front (0°) to the diagonal direction, the occlusion SH of the green sub-pixel 104G increases slightly from the front and decreases from angle θ = 2.2°. Meanwhile, at θ = 2.2°, the occlusion SH of the red sub-pixel 104R and the blue sub-pixel 104B is very small. Therefore, in the comparative example, at angle θ = 2.2°, the mixed color of red and blue is emphasized. The occlusion SH of the blue sub-pixel 104B increases from the front to angle θ = 6.3° and decreases when angle θ = 6.3° or smaller. Meanwhile, at angle θ = 6.3°, the occlusion SH of the red sub-pixel 104R and the green sub-pixel 104G is relatively small. Therefore, in the comparative example, at angle θ = 6.3°, the mixed color of red and green is emphasized. The occlusion SH of the red sub-pixel 104R decreases from the front towards θ = 2.2° and increases from near θ = 4° towards θ = 10.3°. Meanwhile, 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 blocked by the light-blocking element 300 changes from the green sub-pixel 104G to the blue sub-pixel 104B, and then from the blue sub-pixel 104B to the red sub-pixel 104R. Therefore, the color mixing of red, green, and blue becomes unbalanced. As a result, the observer sees colored moiré patterns.

[0119] like Figure 18As shown, in this embodiment, the light-blocking rates SH of the red sub-pixel 104R, green sub-pixel 104G, and blue sub-pixel 104B are different from each other when the angle θ = 2.2°, 6.3°, and 10.3°. However, the change in the light-blocking rate SH relative to the viewing angle θ is very small. Furthermore, when the angle θ = 0°, 4.3°, and 8.3°, the light-blocking rates SH of the red sub-pixel 104R, green sub-pixel 104G, and blue sub-pixel 104B are substantially equal. Therefore, even when a shift occurs in the overlap between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or when the display of the liquid crystal display device 10 is viewed from a diagonal direction, the imbalance in the mixing of red, green, and blue colors is suppressed. As a result, the four light-blocking elements 300 can block the sub-pixels 104 of different colors substantially equally for each color, thereby suppressing color moiré patterns in the liquid crystal display device 10.

[0120] Backlight

[0121] like Figure 1 As shown, the backlight 400 is arranged on the rear side (-Z side) of the second liquid crystal display panel 200. In one example, the backlight 400 is implemented as a direct-lit backlight. The backlight 400 includes white light-emitting diode (LED) elements, reflective sheets, diffuser sheets, etc. (none of which are shown in the figures).

[0122] Display Controller

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

[0124] like Figure 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] Image data distributor 510 distributes input image data to first image signal generator 520 and 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 based on the input image data allocated from the image data distributor 510. Specifically, the first grayscale converter 522 of the first image signal generator 520 performs grayscale conversion to convert the allocated input image data into color image data with brightness-grayscale characteristics suitable for the first liquid crystal display panel 100. A lookup table in which input-output relationships are preset is used in the data conversion. 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 luminance signal generator 530 generates a luminance signal based on input image data allocated from the image data distributor 510. This luminance 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 luminance signal generator 530 calculates the luminance level of the second main pixel 202 of the second liquid crystal display panel 200 based on the average, frequent, minimum, and maximum values ​​of the red, green, and blue grayscale values ​​incident on the 16 first main pixels 102 of the first liquid crystal display panel 100, based on light transmitted through a second main pixel 202 of the second liquid crystal display panel 200. The calculated luminance level can be a grayscale value. The second image luminance signal generator 530 sends a luminance signal representing the calculated luminance 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 a luminance signal sent from the second image luminance signal generator 530. In one example, the second image signal generator 540 generates a monochrome image that has undergone averaging and grayscale conversion. Specifically, the calculator 542 of the second image signal generator 540 averages the luminance level of the second main pixel 202 located within a predetermined distance from the target second main pixel 202 by a weighted average 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. Furthermore, the second grayscale converter 544 of the second image signal generator 540 generates a monochrome image with luminance-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] Because the second image brightness signal generator 530 performs brightness level calculations, averaging, and other processes, 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 outputs of the monochrome image signal and the color image signal. Due to this 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), memory, etc. In one example, the CPU executes a program stored in memory to perform the functions of the display controller 500.

[0131] As described above, the groups 302A of the light-shielding members 300 are arranged in an alternating manner, and the groups 302A of the light-shielding members 300 equally shield the sub-pixels 104 arranged continuously in the X direction for each color. Therefore, the liquid crystal display device 10 can suppress color moiré patterns. Furthermore, the four light-shielding members 300 located within the second main pixel 202, as a group of four, equally shield the sub-pixels 104 for each color, thereby enabling the liquid crystal display device 10 to further suppress color moiré patterns.

[0132] Furthermore, the second main pixel 202 of the second liquid crystal display panel 200 is divided into multiple regions 202A, and a pixel electrode 250 is disposed in each region 202A. Therefore, 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 malfunctions 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 in two rows and two columns. However, the number of divisions of the second main pixel 202 is not limited to four. Similar to 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 switching elements 240 of the first liquid crystal display panel 100 and the second liquid crystal display panel 200...

[0135] The configuration of the light-shielding member 300, etc., is the same as in Embodiment 1. Therefore, the arrangement of the light-shielding member 300 and the overlap between the light-shielding member 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described next.

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

[0137] Additionally, four adjacent regions 202A arranged in two rows and two columns in the X and Y directions form a group 204A. Four light-shielding elements 300 are located within the group 204A of regions 202A. In adjacent groups 204A in the Y direction, the position of the group 204A is offset in the X direction by an amount corresponding to one region 202A.

[0138] In this embodiment, the four light-shielding elements 300 located in group 204A of region 202A form group 302A. For example... Figures 22 to 24 As shown, the four light-shielding members 300 forming the group 302A of 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 light-shielding members 300 correspond to the switching elements 240 connected to the pixel electrodes 250 arranged in each of the four regions 202A of the group 204A that forms the region 202A.

[0139] like Figure 22 As shown, preferably, the groups 302A of the light-shielding members 300 are arranged at intervals twice the width of the region 202A in the X direction, and at intervals four times the width of the region 202A in the Y direction. In the groups 204A of adjacent regions 202A in the Y direction, the position of the group 204A is offset in the X direction by an amount corresponding to one region 202A. Thus, the arrangement of the light-shielding members 300 is an alternating arrangement where the units of the groups 302A are offset by half a spacing in both the X and Y directions. In this embodiment, the four light-shielding members 300 forming the group 302A of the light-shielding members 300 are also sequentially referred to from the -X side as light-shielding member 300a, light-shielding member 300b, light-shielding member 300c, and light-shielding member 300d.

[0140] like Figures 22 to 24 As shown, group 302A of the light-shielding member 300 overlaps with eight sub-pixels 104 arranged in 2 rows and 4 columns in the X and Y directions, and blocks light incident on these sub-pixels 104. Figure 23 In the example shown, group 302A of the light-shielding member 300 overlaps sequentially from the -X side with two blue sub-pixels 104B, two red sub-pixels 104R, two green sub-pixels 104G, and two blue sub-pixels 104B. Group 302A of the light-shielding member 300 blocks light emitted from the backlight 400 and incident on these sub-pixels 104.

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

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

[0143] Furthermore, in a second main pixel 202, there are 12 light-shielding elements 300 located within the second main pixel 202. Figure 23 The sub-pixels 104 are masked equally for each color in groups of 12. Therefore, similar to the liquid crystal display device 10 of Embodiment 1, the liquid crystal display device 10 of this embodiment can further suppress color moiré patterns.

[0144] As described above, the groups 302A of the light-shielding members 300 are arranged in an alternating manner, and the sub-pixels 104 arranged continuously in the X direction are equally shielded for each color by the groups 302A of the light-shielding members 300. Thus, the liquid crystal display device 10 of this embodiment can suppress color moiré patterns. Furthermore, the 12 light-shielding members 300 located within the second main pixel 202 are arranged as a group of 12, equally shielding the sub-pixels 104 for each color, thereby further suppressing color moiré patterns. 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.

[0145] Example 3

[0146] In Embodiment 2, the second main pixel 202 is divided into 12 regions 202A in four rows and three columns in the X and Y directions. However, a configuration in which the second main pixel 202 is divided into 16 regions 202A in four rows and four columns in the X and Y directions can also be used. Similar to 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 elements 240 (light-shielding members 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 is the same as in Embodiment 1. Therefore, the arrangement of the light-shielding members 300 and the overlap between the light-shielding members 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described next.

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

[0148] Additionally, four adjacent regions 202A arranged in two rows and two columns in the X and Y directions form a group 204A. Four light-shielding elements 300 are located within the group 204A of regions 202A. In adjacent groups 204A in the X direction, the position of group 204A is offset in the Y direction by an amount corresponding to one region 202A.

[0149] As in Embodiment 2, four light-shielding elements 300 located within group 204A of region 202A form a group 302A. The four light-shielding elements 300 of group 302A are arranged in a row in the X direction and are close to each other. The light-shielding elements 300 of group 302A correspond to switching elements 240 connected to pixel electrodes 250 arranged in each of the four regions 202A of group 204A forming region 202A. Figure 25 As shown, preferably, the groups 302A of the light-shielding members 300 are arranged at intervals four times the width of the region 202A in the X direction, and at intervals twice the width of the region 202A in the Y direction. In the groups 204A of adjacent regions 202A in the X direction, the position of the group 204A is offset in the Y direction by an amount corresponding to that of one region 202A. Thus, the arrangement of the light-shielding members 300 is an alternating arrangement of the units of the groups 302A offset by half a spacing in both the X and Y directions.

[0150] like Figure 25 and Figure 26As shown, group 302A of the light-shielding member 300 overlaps with eight sub-pixels 104 arranged in 2 rows and 4 columns in the X and Y directions, and blocks light incident on these sub-pixels 104. Figure 25 and Figure 26 In the example shown, group 302A of the light-shielding member 300 overlaps sequentially from the -X side with two green sub-pixels 104G, two blue sub-pixels 104B, two red sub-pixels 104R, and two green sub-pixels 104G. Group 302A of the light-shielding member 300 blocks light emitted from the backlight 400 and incident on these sub-pixels 104.

[0151] Similar to Embodiment 2, the area of ​​the group 302A of the light-shielding member 300 that blocks the green sub-pixels 104G (four green sub-pixels 104G), the area of ​​the group 302A of the light-shielding member 300 that blocks the blue sub-pixels 104B (two blue sub-pixels 104B), and the area of ​​the group 302A of the light-shielding member 300 that blocks the red sub-pixels 104R (two red sub-pixels 104R) are equal. That is, similar to Embodiment 2, the group 302A of the light-shielding member 300 in this embodiment also blocks the sub-pixels 104 continuously arranged in the X direction equally for each color. In addition, in a second main pixel 202, the light-shielding member 300 located in the second main pixel 202 ( Figure 26 ) as a set of 104 subpixels that are equally masked for each color.

[0152] As described above, in this embodiment, similarly, the groups 302A of the light-shielding members 300 are arranged in an interlaced manner, and the sub-pixels 104 arranged continuously in the X direction are equally shielded 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 patterns. 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, thereby the liquid crystal display device 10 of this embodiment can further suppress color moiré patterns. Furthermore, the pixel electrode 250 is provided in each region 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.

[0153] Example 4

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

[0155] However, a configuration in which the light-shielding member 300 is formed by a dummy light-shielding layer can be adopted. Additionally, a group in which the region 202A is formed by four regions 202A and a group in which the region 202A is formed by two regions 202A can be adopted. In the following text, the light-shielding member formed by the dummy light-shielding layer is referred to as light-shielding member 310.

[0156] Similar to 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 elements 240 (light-shielding members 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 is the same as in Embodiment 1. Therefore, 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 will be described next.

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

[0158] When viewed from above by an observer, the dummy light-shielding layer DM acts as a light-shielding element to block light emitted from the backlight 400 and incident on the sub-pixels 104 of the first liquid crystal display panel 100. For example... Figure 28 As shown, the light-shielding member 310 formed by the dummy light-shielding layer DM has the same shape as the light-shielding member 300.

[0159] The arrangement of the light-shielding elements 300 and 310 and the overlap between the light-shielding elements 300 and 310 and the sub-pixels 104 of the first liquid crystal display panel 100 are described next.

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

[0161] In this embodiment, 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 within the group 204A of regions 202A.

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

[0163] Group 204A and Group 204B of Region 202A are each arranged in the Y direction, and the rows in the Y direction of Group 204A and the rows in the Y direction of Group 204B are arranged alternately in the X direction. In the rows in the Y direction of Group 204A and the rows in the Y direction of Group 204B, the position of Group 204A and Group 204B of Region 202A is offset in the Y direction by an amount corresponding to one Region 202A. Note that Group 204A of Region 202A corresponds to the first group, and Group 204B of Region 202A corresponds to the second group. The rows in the Y direction of Group 204A of Region 202A correspond to the first row, and the rows in the Y direction of Group 204B of Region 202A correspond to the second row.

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

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

[0166] like Figure 29 As shown, preferably, the groups 302A of the light-shielding members 300 are arranged at intervals three times the width of region 202A in the X direction, and at intervals twice the width of region 202A in the Y direction. In the rows of groups 204A and 204B in the Y direction, the positions of groups 204A and 204B are offset in the Y direction by an amount corresponding to one region 202A. Thus, the groups of light-shielding members (groups 302A and 302B) are arranged in an alternating pattern, offset by half a spacing in both the X and Y directions.

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

[0168] The group 302B of the light-shielding elements 300 and 310 also overlaps with eight sub-pixels 104 arranged in 2 rows and 4 columns in the X and Y directions, and blocks light incident on these sub-pixels 104. The group 302B of the light-shielding elements 300 and 310 also overlaps sequentially from the -X side with two green sub-pixels 104G, two blue sub-pixels 104B, two red sub-pixels 104R, and two green sub-pixels 104G. The group 302B of the light-shielding element 300 blocks light emitted from the backlight 400 and incident on these sub-pixels 104.

[0169] As in Embodiment 2, the groups of light-shielding members (groups 302A and 302B) cover the same area of ​​green sub-pixels 104G (four green sub-pixels 104G), the same area of ​​blue sub-pixels 104B (two blue sub-pixels 104B), and the same area of ​​red sub-pixels 104R (two red sub-pixels 104R). That is, as in Embodiment 2, group 302A of light-shielding member 300 and group 302B of light-shielding members 300 and 310 equally cover the sub-pixels 104 continuously arranged in the X direction for each color. Furthermore, in a second main pixel 202, the light-shielding members 300 and 310 (groups 302A and 302B) located within the second main pixel 202 cover the same area of ​​green sub-pixels 104G (four green sub-pixels 104G), the same area of ​​blue sub-pixels 104B (two blue sub-pixels 104B), and the same area of ​​red sub-pixels 104R (two red sub-pixels 104R). Figure 30 As a set, 104 subpixels are occluded equally for each color.

[0170] As described above, in this embodiment, the groups of light-shielding members (groups 302A and 302B) are arranged in an alternating manner as 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 patterns. In addition, the light-shielding members 300 and 310 located in the second main pixel 202, as a group, equally shield the sub-pixels 104 for each color, thereby further suppressing color moiré patterns in the liquid crystal display device 10 of this embodiment. Furthermore, the pixel electrode 250 is provided in each region 202A, thereby suppressing the generation of dark spots that are easily visible to the observer in the liquid crystal display device 10 of this embodiment.

[0171] Example 5

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

[0173] However, a configuration in which each of the light-shielding elements 300 and 310 is arranged in an interleaved manner can be adopted. Alternatively, a configuration in which the groups of light-shielding elements 300 and 310 equally shade each sub-pixel 104 in a row of consecutively arranged sub-pixels 104 of the same color (the row of red sub-pixels 104R, the row of green sub-pixels 104G, and the row of blue sub-pixels 104B) for each color can be adopted.

[0174] Similar to 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 elements 240 (light-shielding members 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 is the same as in Embodiment 1. Therefore, the arrangement of the light-shielding members 300 and the overlap between the light-shielding members 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described next.

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

[0176] In this embodiment, two adjacent regions 202A in the Y direction form a group 204A. The group 204A of regions 202A is arranged in a matrix in the X and Y directions. Two light-shielding members 300 are located within the group 204A of regions 202A. The light-shielding members 300 correspond to a switching element 240 connected to a pixel electrode 250 arranged in each of the two regions 202A that form the group 204A of regions 202A.

[0177] The two light-shielding elements 300 within group 204A of region 202A are arranged offset in the X direction in each of the two regions 202A. Therefore, the light-shielding elements 300 are arranged one after another in an alternating manner.

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

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

[0180] Furthermore, in a second main pixel 202, four light-blocking elements 300 located within the second main pixel 202 block the sub-pixel 104 equally for each color as a group of four. Therefore, the liquid crystal display device 10 is able to further suppress color moiré patterns.

[0181] Specifically, such as Figure 32 As shown, in this embodiment, the change in the light-blocking rate SH relative to the viewing angle θ is very small. Therefore, when a shift occurs in the overlap between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or when the display of the liquid crystal display device 10 is viewed from a diagonal direction, the four light-blocking members 300 can block the sub-pixels 104 of different colors substantially equally for each color, thereby enabling the liquid crystal display device 10 to suppress color moiré patterns.

[0182] As described above, similarly, in this embodiment, the liquid crystal display device 10 is able to suppress color moiré patterns. Furthermore, pixel electrodes 250 are provided in each region 202A, thereby enabling the liquid crystal display device 10 of this embodiment to suppress the generation of dark spots that are easily visible to the observer.

[0183] Example 6

[0184] In embodiment 5, the group 302A of the light-shielding members 300 is arranged as a group and each sub-pixel 104 in a row SL of consecutively arranged sub-pixels 104 of the same color is equally blocked for each color. However, a configuration in which the light-shielding members 300 are arranged in an interleaved manner as a group and each sub-pixel 104 is equally blocked for each color can be adopted.

[0185] Similar to 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 elements 240 (light-shielding members 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 is the same as in Embodiment 1. Therefore, the arrangement of the light-shielding members 300 and the overlap between the light-shielding members 300 and the sub-pixels 104 of the first liquid crystal display panel 100 will be described next.

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

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

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

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

[0190] Furthermore, similarly, in this embodiment, the six light-shielding elements 300 located within the second main pixel 202 shield the sub-pixels 104 equally for each color as a group of six. Therefore, the liquid crystal display device 10 is able to further suppress color moiré patterns.

[0191] As described above, similarly, in this embodiment, the liquid crystal display device 10 is able to suppress color moiré patterns. Furthermore, pixel electrodes 250 are provided in each region 202A, thereby enabling the liquid crystal display device 10 of this embodiment to suppress 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 in which the scan lines GL and signal lines DL of the second liquid crystal display panel 200 are bent can be adopted. Additionally, a configuration in which the scan lines GL and signal lines DL of the second liquid crystal display panel 200 form a light-shielding pattern can be adopted.

[0194] Similar to 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 elements 240 (light-shielding members 300) of the first liquid crystal display panel 100 and the second liquid crystal display panel 200 is the same as in Embodiment 1. In addition, the configuration of the light-shielding members 300 and the overlap between the light-shielding members 300 and the sub-pixels 104 of the first liquid crystal display panel 100 are the same as in Embodiment 1. Therefore, the overlap between the scan lines GL and signal lines DL of the second liquid crystal display panel 200 and the first main pixel 102 (sub-pixel 104) of the first liquid crystal display panel 100 will be described next.

[0195] First, the scan line GL is described. The scan line GL is light-shielding and is formed of metals (such as aluminum (Al), molybdenum (Mo)). For example... Figure 34 and Figure 35 As shown, the scan lines GL extend in the X direction and are arranged in the Y direction. Additionally, a pair of adjacent scan lines GL form a first light-blocking pattern 260 extending in the X direction. The first light-blocking pattern 260 is repeated 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, in Figure 34 The scan line GL is shown as a solid line, and the signal line DL is shown as a dashed line.

[0196] like Figure 35 As shown, one of the pair of adjacent scan lines GL (hereinafter also referred to as "first 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 a clockwise direction relative to the +X direction, and the second inclined portion 262b is inclined at an acute angle in the opposite direction (counterclockwise) 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 scan line GL in the pair of adjacent scan lines GL (hereinafter also referred to as "second shielding line 264") is line-symmetrical with the first scan line GL (first 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 shielding line 262 and is inclined at an acute angle counterclockwise relative to the +X direction. The fourth inclined portion 264b is opposite to the second inclined portion 262b of the first shielding line 262 and is inclined at an acute angle relative to the +X direction in the opposite direction (clockwise) to the third inclined portion 264a. The second flat portion 264c extends parallel to the X direction, is opposite to the first flat portion 262c of the first shielding line 262, and connects the third inclined portion 264a and the fourth inclined portion 264b to each other.

[0198] The first shading light 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 a clockwise direction relative to the +X direction, and the second inclined portion 262b is inclined at an acute angle in a direction opposite to the first inclined portion 262a relative to the +X direction. Furthermore, the first shading light 262 and the second shading light 264 adjacent to the first shading light 262 are linearly symmetrical in the X direction. Therefore, as... Figure 35 As shown, the interval between the first light-shielding light 262 and the second light-shielding light 264 continuously varies between the first inclined portion 262a of the first light-shielding light 262 and the third inclined portion 264a of the second light-shielding light 264 (interval L1), and continuously varies between the second inclined portion 262b of the first light-shielding light 262 and the fourth inclined portion 264b of the second light-shielding light 264 (interval L2). Furthermore, the intervals between the first flat portion 262c of the first light-shielding light 262 and the second flat portion 264c of the second light-shielding light 264 (intervals L3 and L4) also vary. Due to these configurations, even when the second liquid crystal display panel 200 is stacked on the first liquid crystal display panel 100, spatial frequency interference between the second liquid crystal display panel 200 and the first liquid crystal display panel 100 can be suppressed, and moiré patterns in the liquid crystal display device 10 can be suppressed. Note that, preferably, the period of the first light-shielding pattern 260 is a natural multiple of the width in the X direction of the first main pixel 102.

[0199] The signal line DL will be described next. Like the scan line GL, the signal line DL is light-shielding and is formed of metal (aluminum (Al), molybdenum (Mo), etc.). Figure 34 and Figure 35As shown, the signal line DL extends in the Y direction and is arranged in the X direction. In addition, a pair of adjacent signal lines DL form a second light-shielding pattern 270 extending in the Y direction. The second light-shielding pattern 270 is repeated 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 Figure 35 As shown, one of the pair of adjacent signal lines DL (hereinafter also referred to as "third 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 a counterclockwise direction relative to the +Y direction. The sixth inclined portion 272b is inclined at an acute angle in the opposite direction (clockwise direction) relative to the +Y direction relative to the fifth inclined portion 272a.

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

[0202] The third shading light 272 includes a fifth inclined portion 272a and a sixth inclined portion 272b. The fifth inclined portion 272a is inclined at an acute angle counterclockwise with respect to the +Y direction, and the sixth inclined portion 272b is inclined at an acute angle with respect to the +Y direction in the opposite direction to the fifth inclined portion 272a. Furthermore, the third shading light 272 and the fourth shading light 274 adjacent to the third shading light 272 are linearly symmetrical in the Y direction. Therefore, as... Figure 35As shown, the interval L5 between the third light-shielding light 272 and the fourth light-shielding light 274 changes continuously. Due to this configuration, even when the second liquid crystal display panel 200 is stacked on top of the first liquid crystal display panel 100, spatial frequency interference between the second liquid crystal display panel 200 and the first liquid crystal display panel 100 can be suppressed, and moiré patterns in the liquid crystal display device 10 can be suppressed. Note that, preferably, the period of the second light-shielding pattern 270 is a natural multiple of the Y-direction width of the sub-pixel 104.

[0203] The following describes the overlap between the first light-blocking pattern 260 and the second light-blocking pattern 270 and the first main pixel 102 (sub-pixel 104) of the first liquid crystal display panel 100. For example... Figure 34 As shown, in the first light-shielding pattern 260 extending along the X direction, the first inclined portion 262a and the second inclined portion 262B of the first light-shielding light 262, and the third inclined portion 264a and the fourth inclined portion 264b of the second light-shielding light 264 are inclined across multiple 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-pixels 104 overlapping with the first light-shielding pattern 260 is slightly reduced, and the first main pixel 102 including the sub-pixels 104 overlapping with the first light-shielding pattern 260 displays a color slightly different from the color to be displayed. However, since the sub-pixels 104 where the same level of brightness reduction occurs are nearby, the brightness of the sub-pixels 104 is averaged for an observer viewing the liquid crystal display device 10, and the observer perceives the brightness of these multiple sub-pixels 104 with reduced brightness as the same grayscale. Therefore, in the overall display of the liquid crystal display device 10, it is possible to suppress the observer's perception of color moiré patterns.

[0204] In the second light-shielding pattern 270 extending in the Y direction, the fifth tilted portion 272a and the sixth tilted portion 272b of the third light-shielding line 272, and the seventh tilted portion 274a and the eighth tilted portion 274b of the fourth light-shielding line 274, are tilted across multiple sub-pixels 104 of different colors (red sub-pixels 104R and blue sub-pixels 104B) of the first liquid crystal display panel 100. Therefore, similar to the first light-shielding pattern 260, the first main pixel 102, including the sub-pixels 104 overlapping with the second light-shielding pattern 270, displays a color slightly different from the desired color. However, the color of the first main pixel 102 including the sub-pixels 104 overlapping with the second light-shielding pattern 270 is perceived 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-pixels 104 overlapping with the second light-shielding pattern 270, and the saturation of the mixed color is also reduced. Thus, in the overall display of the liquid crystal display device 10, the observation of color moiré patterns can be suppressed.

[0205] As described above, the first light-shielding pattern (scan 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 that is linearly symmetrical with respect to the first light-shielding line 262 in the X direction. The first light-shielding line 262 includes a first inclined portion 262a inclined relative to the +X direction, a second inclined portion 262b inclined relative to the +X direction in the opposite direction to the first inclined portion 262a, and a first flat portion 262c connecting the first inclined portion 262a and the second inclined portion 262b to each other. This suppresses spatial frequency interference between the first liquid crystal display panel 100 and the second liquid crystal display panel 200, and also suppresses moiré patterns in the liquid crystal display device 10. Furthermore, it suppresses the occurrence of color moiré patterns.

[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 that is linearly symmetrical with respect to the third light-shielding line 272 in the Y direction. The third light-shielding line 272 includes a fifth inclined portion 272a that is inclined at an acute angle relative to the +Y direction, and a sixth inclined portion 272b that is inclined at an acute angle relative to the +Y direction in the opposite direction to the fifth inclined portion 272a. This suppresses spatial frequency interference between the first liquid crystal display panel 100 and the second liquid crystal display panel 200, and also suppresses moiré patterns in the liquid crystal display device 10. Furthermore, it suppresses the occurrence of color moiré patterns.

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

[0208] Example 8

[0209] It is sufficient for the multiple light-shielding elements 300 located within the second main pixel 202 to equally shield the sub-pixels 104 for each color. Except for the overlap between the light-shielding elements 300 and the sub-pixels 104 of the first liquid crystal display panel 100, the liquid crystal display device 10 of this embodiment is the same as the liquid crystal display device 10 of Embodiment 2. Therefore,

[0210] The following describes the overlap between the light-shielding member 300 and the sub-pixels 104 of the first liquid crystal display panel 100.

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

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

[0213] However, the 12 light-shielding elements 300 located within the second main pixel 202 Figure 37 The 12 light-shielding elements 300 shield each sub-pixel 104 equally for each color as a group of 12. Therefore, when a shift occurs in the overlap between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or when the display of the liquid crystal display device 10 is viewed from a diagonal direction, these 12 light-shielding elements 300 can shield the sub-pixels 104 of different colors substantially equally for each color as a group of 12.

[0214] Specifically, such as Figure 38 As shown, in this embodiment, the change in the light-blocking rate SH relative to the viewing angle θ is small in each color sub-pixel 104. Therefore, when a shift occurs in the overlap between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or when the display of the liquid crystal display device 10 is viewed from a diagonal direction, these 12 light-blocking elements 300 can substantially equally block the sub-pixels 104 of different colors for each color, thereby enabling the liquid crystal display device 10 to suppress color moiré patterns.

[0215] As described above, the 12 light-blocking elements 300 located within the second main pixel 202, arranged in groups of 12, equally block the sub-pixels 104 for each color. Therefore, the liquid crystal display device 10 of this embodiment can suppress color moiré patterns. Furthermore, a pixel electrode 250 is provided in each region 202A, thereby enabling the liquid crystal display device 10 of this embodiment to suppress the generation of dark spots that are easily visible to the observer.

[0216] Modify Example

[0217] Embodiments have been described, but various modifications may be made to this disclosure without departing from the spirit and scope of the 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 can be used for the first liquid crystal display panel 100 and the second liquid crystal display panel 200.

[0219] In this embodiment, the first polarizing plate 132 of the first liquid crystal display panel 100 also serves as a polarizing plate on the light 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 main surface 220b of the second opposing substrate 220 can be adopted.

[0220] In this 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-shaped shape can be adopted. For example, a configuration in which each sub-pixel 104 has a V-shaped shape when the sub-pixel 104 has a multi-domain structure can be adopted.

[0221] A configuration can be adopted in which, when the pixel electrode of 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 sub-pixel 104.

[0222] like Figure 39 As shown, a configuration can 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 shield 300 formed by each switching element 240 has Figure 40 The shape shown.

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

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

[0225] In Embodiment 4, a dummy light-shielding layer DM is formed on the main surface 210a of the second TFT substrate 210. However, the location 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 used.

[0226] In embodiment 4, the light-shielding elements 300 and 310 of group 302B are arranged in the X direction in the order of light-shielding element 300, light-shielding element 310, light-shielding element 310, and light-shielding element 300 (i.e., two light-shielding elements 300 sandwiching two light-shielding elements 310). However, a configuration in which the light-shielding elements 300 and 310 in group 302B are arranged in the X direction in the order of light-shielding element 300, light-shielding element 300, light-shielding element 310, and light-shielding element 310. Alternatively, a configuration in which group 302B arranged in the order of light-shielding element 300, light-shielding element 310, light-shielding element 310, and light-shielding element 300, and group 302B arranged in the order of light-shielding element 300, light-shielding element 300, light-shielding element 310, and light-shielding element 310, are arranged alternately in the Y direction.

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

[0228] The number of first main pixels 102 of the first liquid crystal display panel 102 corresponding to one second main pixel 202 of the second liquid crystal display panel 200 can be set as needed. Furthermore, the number of regions 202A into which one second main pixel 202 of the second liquid crystal display panel 200 is divided can be set as needed. From the perspective of resolution, wiring complexity, and suppression of dark spots, it is preferable that the size of the second main pixel 202 is approximately 500μm × 500μm, and the size of each region 202A is 250μm × 250μm or smaller. Additionally, it is preferable that the number of divisions for each second main pixel 202 is from 4 to 16.

[0229] In this 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, as Figure 43 As shown, a configuration in which the second main pixel 202 has a non-rectangular shape can be adopted. In this case, by assuming a virtual region 202S with a rectangular shape, the light-shielding member 300 can be arranged as in the embodiment.

[0230] In embodiment 5, where the light-shielding members 300 are arranged in an alternating manner, the second main pixels 202 of the second liquid crystal display panel 200 are divided into four regions 202A in two rows and two columns in the X and Y directions. When the light-shielding members 300 are arranged in an alternating manner, the number of divisions of the second main pixels 202 can also be set as needed. For example, as Figure 44 As shown, a configuration in which the second main pixel 202 is divided into 12 regions 202A in 4 rows and 3 columns in the X and Y directions can be adopted. Similarly, in this case, the group 302A of the light-blocking member 300 is arranged as a group, and each sub-pixel 104 of the same color is equally occluded in a row SL of continuous arrangement. Similarly, in this modified example, as... Figure 45 As shown, the light-blocking rate SH changes very little with respect to the viewing angle θ. Therefore, when a shift occurs in the overlap between the second liquid crystal display panel 200 and the first liquid crystal display panel 100, or when the display of the liquid crystal display device 10 is viewed from a diagonal direction, the light-blocking member 300 of the second main pixel 202 can substantially equally block the sub-pixels 104 of different colors for each color, and the liquid crystal display device 10 can suppress color moiré patterns.

[0231] In embodiment 7, the second liquid crystal display panel 200 includes a first light-shielding pattern 260 and a second light-shielding pattern 270. However, it is sufficient for the second liquid crystal display panel 200 to include at least one of the first light-shielding pattern 260 and the second light-shielding pattern 270.

[0232] Furthermore, the first shading line 262 of the first light-shielding pattern 260 includes a first flat portion 262c, and the second shading line 264 of the first light-shielding pattern 260 includes a second flat portion 264c. However, a configuration in which the first shading line 262 does not include the first flat portion 262c, and the second shading line 264 does not include the second flat portion 264c, is also possible. That is, a configuration in which the first shading line 262 and the second shading line 264 have a linear symmetrical relationship in the X direction and each extends in a zigzag shape in the X direction is also possible.

[0233] Simultaneously, a configuration can be adopted in which the third shading 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. Alternatively, a configuration can be adopted in which the fourth shading 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 can 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 a first light-shielding pattern 260 and a second light-shielding pattern 270.

[0235] Some exemplary embodiments have been described above for illustrative purposes. Although specific embodiments have been given in the foregoing discussion, those skilled in the art will recognize that changes in form and detail may be made without departing from the broader spirit and scope of the invention. Therefore, the specification and drawings are to be considered illustrative rather than restrictive. Consequently, this detailed description is not limiting, and the scope of the invention is defined only by the included claims and the full scope of their equivalents.

Claims

1. A liquid crystal display device, comprising: A first liquid crystal display panel, wherein a first main pixel including a plurality of sub-pixels of different colors is arranged in a matrix in a predetermined first direction and 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 is located on the side of the first liquid crystal display panel opposite to the observer's side and overlaps the first liquid crystal display panel. It includes second main pixels corresponding to a plurality of first main pixels. The second liquid crystal display panel displays a monochrome image. The second main pixel is divided into multiple regions and has pixel electrodes arranged in the multiple regions, as well as multiple light-shielding elements. At least a portion of the plurality of light-shielding elements is formed by a switching element connected to each of the pixel electrodes. The multiple light-shielding elements are arranged in an alternating manner. A set of light-shielding elements located within a group of adjacent areas forms a set of light-shielding elements, and The set of light-blocking elements equally blocks light incident on the sub-pixel for each color.

2. The liquid crystal display device according to claim 1, wherein... The set of light-blocking elements equally blocks light incident on the continuously arranged sub-pixels for each color, and The plurality of light-shielding elements are arranged in an alternating manner, with the group of light-shielding elements as the unit.

3. The liquid crystal display device according to claim 2, wherein, The plurality of light-blocking elements located within the second main pixel equally block light incident on the sub-pixel for each color.

4. The liquid crystal display device according to claim 2, wherein... The region is formed by a first group of regions arranged in two rows and two columns in the predetermined first direction and the predetermined second direction, and by a second group of two regions arranged in the predetermined second direction. A first row and a second row are arranged alternately in the predetermined first direction. In the first row, the first group is arranged in the predetermined second direction, and in the second row, the second group is arranged in the predetermined second direction by an offset 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 elements is formed by arranging four light-shielding elements formed by the switching elements in the predetermined first direction. In the second group of regions, the group of light-shielding elements is formed by arranging two light-shielding elements formed by the switching element and two light-shielding elements formed by the dummy light-shielding layer 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-shielding elements spans multiple sub-pixels of 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 a repeating light-shielding pattern that has a light-shielding function. 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 with respect to the extension direction and a second inclined portion inclined with respect to the extension direction in a direction opposite to the first inclined portion. The second light-shielding line is adjacent to the first light-shielding line and is linearly symmetrical with the first light-shielding line in the extension direction. The first and second light-shielding lines are formed by selecting one of the scan lines and signal lines from the second liquid crystal display panel.

Images