Liquid crystal display device

Abstract

To provide a liquid crystal display device for suppressing color moire.SOLUTION: A liquid crystal display device includes a first liquid crystal display panel and a second liquid crystal display panel. In the first liquid crystal display panel, a first main pixel having multiple sub-pixels 104 having different colors is disposed in a matrix in a first predetermined direction and in a second predetermined direction. The second liquid crystal display panel overlaps with the first liquid crystal display panel, and a second main pixel 202 is disposed in a matrix in the first predetermined direction and in the second predetermined direction. The second liquid crystal display panel has a scanning wire GL2 extending zigzag in the first predetermined direction. A period of a bending point P of the scanning wire GL2 is equal to a predetermined number N of the sub-pixels 104 of the first liquid crystal display panel. The predetermined number N is larger than the number of colors of the sub-pixels 104 arranged in the first predetermined direction in one first main pixel of the first liquid crystal display panel, and is not equal to a multiple of the natural number of the number of colors of the sub-pixel 104 repeatedly arranged along the first predetermined direction of the first liquid crystal display panel.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] There are known liquid crystal display devices that improve contrast by stacking multiple liquid crystal display panels. For example, Patent Document 1 discloses a display panel that includes stacked display liquid crystal panels and a light control panel.

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

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

[0005] In Patent Document 1, the signal lines of the light control panel are made into bent lines, and the signal lines of the light control panel and the grid lines (gate lines and data lines) of the display liquid crystal panel are formed into different patterns to improve moire in the display panel. However, since the bending points of the bent lines of the light control panel, which widely block light from the backlight, are located between pixels of a specific color on the display liquid crystal panel (for example, between green pixels and blue pixels), the bending points of the bent lines of the light control panel periodically block light incident on the pixels of the specific color on the display liquid crystal panel, periodically reducing the brightness of the pixels of the specific color, which may cause color moire in the display panel.

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

[0007] In order to achieve the above object, a liquid crystal display device according to a first aspect of the present disclosure comprises: a first liquid crystal display panel that displays a color image, in which first main pixels each having 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 first direction; a second liquid crystal display panel located on the opposite side of the first liquid crystal display panel from the viewer side and overlapping the first liquid crystal display panel, the second main pixels being arranged in a matrix in the predetermined first direction and the predetermined second direction, and displaying a monochrome image; the second liquid crystal display panel has scanning lines extending in a zigzag pattern in the predetermined first direction, the period of the bend points of the scanning lines of the second liquid crystal display panel arranged along the predetermined first direction is equal to the predetermined number of the sub-pixels of the first liquid crystal display panel; The predetermined number is greater than the number of colors of the sub-pixels arranged in the predetermined first direction in one of the first main pixels of the first liquid crystal display panel, and is a natural number multiple of the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel. Ku, the first liquid crystal display panel has first signal lines arranged between the sub-pixels and extending in the predetermined second direction; the second liquid crystal display panel has a first light-shielding pattern extending in the predetermined second direction; the first light-shielding pattern is formed of a second signal wiring extending in the predetermined second direction, or the second signal wiring and a dummy line extending in the predetermined second direction; When viewed from the front, the first light-shielding pattern is arranged for each of the sub-pixels of the first liquid crystal display panel, the number of which is one greater than the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction, and overlaps the first signal wiring of the first liquid crystal display panel. [Effects of the Invention]

[0008] According to the present disclosure, the period of the bending points of the scanning lines of the second liquid crystal display panel, which are aligned along a predetermined first direction, is equal to a predetermined number of subpixels of the first liquid crystal display panel. The predetermined number is greater than the number of colors of the subpixels aligned along the predetermined first direction in one first main pixel of the first liquid crystal display panel, and is not a natural number multiple of the number of colors of the subpixels aligned repeatedly along the predetermined first direction of the first liquid crystal display panel. This allows the colors of the subpixels that are blocked from incident light by the bending points to change sequentially, thereby suppressing color moiré in the liquid crystal display device. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing a liquid crystal display device according to Embodiment 1. FIG. [Figure 2] FIG. 2 is a plan view showing a first liquid crystal display panel according to the first embodiment. [Figure 3] 1 is a cross-sectional view showing a liquid crystal display device according to Embodiment 1. FIG. [Figure 4] 3 is a schematic diagram showing first scanning lines and first signal lines of the first liquid crystal display panel according to the first embodiment. FIG. [Figure 5] FIG. 3 is a plan view showing a second liquid crystal display panel according to the first embodiment. [Figure 6] 10 is a schematic diagram showing second scanning lines, second signal lines, dummy lines, and sub-pixels of the first liquid crystal display panel in two second main pixels as viewed from the front, according to the first embodiment. FIG. [Figure 7] 10 is a schematic diagram showing second scanning lines and sub-pixels of a first liquid crystal display panel in four second main pixels as viewed from the front, according to the first embodiment. FIG. [Figure 8] 10 is a schematic diagram showing second scanning lines and sub-pixels of the first liquid crystal display panel in four second main pixels as viewed from a position closer to the −X side from the front according to the first embodiment. FIG. [Figure 9] 10 is a schematic diagram showing second scanning lines and sub-pixels of the first liquid crystal display panel in four second main pixels as viewed from a position closer to the +X side from the front according to the first embodiment. FIG. [Figure 10]FIG. 2 is a plan view showing second scanning lines, second signal lines, switching elements, etc. [Figure 11] 11 is a cross-sectional view of the switching element and the contact hole shown in FIG. 10 taken along the line AA. [Figure 12] 11 is a cross-sectional view of the second scanning lines and the dummy lines shown in FIG. 10, taken along the line BB. [Figure 13] FIG. 2 is a block diagram showing a display control unit according to the first embodiment. [Figure 14] 10 is a schematic diagram showing second scanning lines and sub-pixels of a first liquid crystal display panel in four second main pixels as viewed from the front, according to the second embodiment. FIG. [Figure 15] FIG. 10 is a schematic diagram showing second scanning lines and sub-pixels of a first liquid crystal display panel in four second main pixels as viewed from the front, according to the third embodiment. [Figure 16] FIG. 10 is a plan view showing a first main pixel of a first liquid crystal display panel according to a fourth embodiment. [Figure 17] FIG. 10 is a schematic diagram showing second scanning lines and sub-pixels of a first liquid crystal display panel in four second main pixels as viewed from the front, according to a fourth embodiment. [Figure 18] FIG. 11 is a schematic diagram showing second scanning lines and sub-pixels of a first liquid crystal display panel in four second main pixels as viewed from the front, according to a fifth embodiment. [Figure 19] FIG. 13 is a schematic diagram showing second signal wiring and dummy lines according to the sixth embodiment. [Figure 20] FIG. 13 is a plan view showing a second liquid crystal display panel according to the seventh embodiment. [Figure 21] FIG. 13 is a schematic diagram showing second scanning lines, second signal lines, and sub-pixels of a first liquid crystal display panel in one second main pixel as viewed from the front, according to the seventh embodiment. [Figure 22] 13 is a schematic diagram showing second scanning lines and sub-pixels of a first liquid crystal display panel according to a seventh embodiment. FIG. [Figure 23] FIG. 13 is a schematic diagram showing a pixel electrode according to a seventh embodiment. [Figure 24] 10 is a schematic diagram showing second signal wiring and dummy lines according to a modified example. FIG. DETAILED DESCRIPTION OF THE INVENTION

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

[0011] <Embodiment 1> A liquid crystal display device 10 according to this embodiment will be described with reference to Figures 1 to 13. The liquid crystal display device 10 displays color images using a first liquid crystal display panel 100 and a second liquid crystal display panel 200, which will be described later.

[0012] As shown in FIG. 1, the liquid crystal display device 10 includes a panel unit 50, a backlight 300, and a display control unit 400. The panel unit 50 includes a first liquid crystal display panel 100 and a second liquid crystal display panel 200. The backlight 300 is a light source that irradiates the first liquid crystal display panel 100 and the second liquid crystal display panel 200 with light. The display control unit 400 controls the display of the first liquid crystal display panel 100 and the second liquid crystal display panel 200. For ease of understanding, the description herein will be made assuming that the rightward direction (toward the right on the paper) of the liquid crystal display device 10 in FIG. 1 is the +X direction, the upward direction (upward on the paper) is the +Y direction, and the direction perpendicular to the +X and +Y directions (toward the viewer on the paper) is the +Z direction. The X direction corresponds to a predetermined first direction, and the Y direction corresponds to a predetermined second direction.

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

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

[0015] As shown in FIG. 2, the first liquid crystal display panel 100 has a rectangular display area 101 and first main pixels 102 arranged in a matrix in the X and Y directions. The first main pixels 102 are defined in a V-shape by a black matrix BM and are composed of a red pixel 104R that emits red light, a green pixel 104G that emits green light, and a blue pixel 104B that emits blue light, all aligned in the X direction. The red pixel 104R, the green pixel 104G, and the blue pixel 104B are divided into two domains 104a and 104b, which have different rotation directions of the first liquid crystal 130. The domains 104a and 104b are also defined by the black matrix BM. The red pixel 104R, the green pixel 104G, the blue pixel 104B, and a white pixel 104W (described later) may be collectively referred to as sub-pixels 104.

[0016] 2, in this embodiment, the first main pixels 102 are aligned in the X direction (a predetermined first direction) and the Y direction (a predetermined second direction), and the red pixel 104R, the green pixel 104G, and the blue pixel 104B of the first main pixels 102 are aligned in the X direction, so the number of colors of the sub-pixels 104 aligned in the X direction in one first main pixel 102 is three. In addition, the number of colors of the sub-pixels 104 aligned repeatedly along the X direction is also three.

[0017] 3, 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 polarizer 132, a second polarizer 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 polarizer 132 is provided on the first TFT substrate 110, and the second polarizer 134 is provided on the first opposing substrate 120.

[0018] The first TFT substrate 110 is, for example, a glass substrate. A TFT for selecting the sub-pixels 104, a common electrode, a pixel electrode, an alignment film for aligning the first liquid crystal 130, and the like are provided on a main surface 110a of the first TFT substrate 110 facing the first liquid crystal 130 (none of which are shown).

[0019] Furthermore, a plurality of common lines (not shown), a plurality of first scan lines GL1, and a plurality of first signal lines DL1 are formed on the main surface 110a of the first TFT substrate 110. The common lines supply a common potential to a common electrode that applies a voltage to the first liquid crystal 130. As shown in FIG. 4, the first scan lines GL1 extend linearly in the X direction and supply a voltage to operate the TFTs. The first signal lines DL1 extend zigzag in the Y direction along the contours (V-shapes) of the subpixels 104. The first signal lines DL1 supply a voltage to pixel electrodes that apply a voltage to the first liquid crystal 130 via the TFTs. The subpixels 104 are surrounded by the first scan lines GL1 and the first signal lines DL1, and the TFTs are provided at the intersections of the first scan lines GL1 and the first signal lines DL1. As shown in FIG. 3, a first polarizing plate 132 is provided on a main surface 110b of the first TFT substrate 110 opposite the main surface 110a. 4, the first scanning lines GL1 and the first signal lines DL1 are indicated by solid lines. In the following drawings, the first scanning lines GL1, the first signal lines DL1, etc. may also be indicated by solid lines or broken lines.

[0020] As shown in Fig. 3, the first opposing substrate 120 faces the first TFT substrate 110 and is bonded to the first TFT substrate 110 with a sealant 138. The first opposing substrate 120 is, for example, a glass substrate. A color filter 122, a black matrix BM, an alignment film for aligning the first liquid crystal 130, and the like are provided on a main surface 120a of the first opposing substrate 120 facing the first liquid crystal 130. A second polarizing plate 134 is provided on a main surface 120b of the first opposing substrate 120 opposite the main surface 120a. Note that the black matrix BM, the alignment film, and the like are omitted from Fig. 3 for ease of understanding.

[0021] The color filter 122 is a striped color filter in which color filters of the same color are arranged in the Y direction. Each of the red, green, and blue color filters of the color filter 122 is surrounded by a black matrix BM and corresponds to a red pixel 104R, a green pixel 104G, and a blue pixel 104B, respectively.

[0022] As shown in FIG. 2, the black matrix BM defines the first main pixel 102, the sub-pixel 104, and the domains 104a and 104b. The black matrix BM covers the first scan line GL1 and the first signal line DL1. The line segments of the black matrix BM extending in the X direction extend linearly, similar to the first scan line GL1. The line segments of the black matrix BM extending in the Y direction extend in a zigzag pattern, similar to the first signal line DL1.

[0023] 3, the first liquid crystal 130 is sandwiched between the first TFT substrate 110 and the first counter substrate 120. The first liquid crystal 130 is, for example, a positive nematic liquid crystal. The first liquid crystal 130 is initially aligned in a direction parallel to the main surface 110a of the first TFT substrate 110 by an alignment film. Furthermore, the first liquid crystal 130 rotates in a plane parallel to the main surface 110a of the first TFT substrate 110 when a voltage is applied.

[0024] The first polarizer 132 is provided on the main surface 110b of the first TFT substrate 110, and the second polarizer 134 is provided on the main surface 120b of the first counter substrate 120. One of the transmission axes of the first polarizer 132 and the second polarizer 134 is arranged parallel to the initial alignment direction of the first liquid crystal 130, and the transmission axis of the first polarizer 132 and the transmission axis of the second polarizer 134 are perpendicular to each other. The first polarizer 132 is attached to a second counter substrate 220 of the second liquid crystal display panel 200 (described later) by a light-transmitting adhesive layer 150. The adhesive layer 150 is, for example, an OCA (Optical Clear Adhesive).

[0025] The first driver circuit 136 is provided on the main surface 110a of the first TFT substrate 110. The first driver circuit 136 supplies voltages to the first scanning lines GL1, the first signal lines DL1, and the common lines based on color image signals supplied from the display control unit 400.

[0026] (Second LCD panel) 3, the second liquid crystal display panel 200 is located on the rear side (-Z side) of the first liquid crystal display panel 100, and is bonded to the first liquid crystal display panel 100 by an adhesive layer 150. The second liquid crystal display panel 200 displays monochrome images.

[0027] In this embodiment, the second liquid crystal display panel 200 is a transmissive IPS-mode liquid crystal display panel using positive liquid crystal. The second liquid crystal display panel 200 is active-matrix driven by switching elements 240, which will be described later. As shown in FIG. 5 , the second liquid crystal display panel 200 has second main pixels 202 arranged in a matrix in the X and Y directions. In this embodiment, each second main pixel 202 of the second liquid crystal display panel 200 corresponds to 16 first main pixels 102 (four in the X direction and four in the Y direction) of the first liquid crystal display panel 100, and each second main pixel 202 of the second liquid crystal display panel 200 emits light to the 16 first main pixels 102 of the first liquid crystal display panel 100.

[0028] 3, the second liquid crystal display panel 200 includes a second TFT substrate 210, a second opposing substrate 220, a second liquid crystal 230, a third polarizer 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 polarizer 232 is provided on the second TFT substrate 210. In this embodiment, the first polarizer 132 of the first liquid crystal display panel 100 also serves as the polarizer on the light-emitting side of the second liquid crystal display panel 200. The second liquid crystal display panel 200 does not include a color filter or a black matrix.

[0029] The second TFT substrate 210 is, for example, a glass substrate. A plurality of second scan lines GL2, a plurality of second signal lines DL2, a plurality of dummy lines DM, a common line (not shown), the switching elements 240, pixel electrodes 250, and common electrodes CE of the second main pixels 202, an alignment film (not shown) for aligning the second liquid crystal 230, and the like are formed on a main surface 210a of the second TFT substrate 210 facing the second liquid crystal 230. The common line supplies a common potential to the common electrode CE that applies a voltage to the second liquid crystal 230. The second scan line GL2 supplies a voltage for operating the switching elements 240. The second signal line DL2 supplies a voltage to the pixel electrodes 250 that apply a voltage to the second liquid crystal 230 via the switching elements 240. The dummy lines DM are made of a material that blocks light incident from the backlight 300. The dummy lines DM and the second signal lines DL2 form a first light-shielding pattern 260, which will be described later. A third polarizing plate 232 is provided on a main surface 210b opposite to the main surface 210a of the second TFT substrate 210. The configurations of the second scanning lines GL2, the second signal lines DL2, the dummy lines DM, the second main pixels 202 (the switching elements 240, the common electrodes CE, and the pixel electrodes 250) will be described later.

[0030] The second opposing substrate 220 faces the second TFT substrate 210 and is bonded to the second TFT substrate 210 with a sealant 238. The second opposing substrate 220 is, for example, a glass substrate. An alignment film (not shown) that aligns the second liquid crystal 230 is provided on a main surface 220a of the second opposing substrate 220 facing the second liquid crystal 230. An adhesive layer 150 is provided on a main surface 220b of the second opposing substrate 220 opposite the main surface 220a. The second opposing substrate 220 is bonded to the first liquid crystal display panel 100 (first polarizer 132) via the adhesive layer 150.

[0031] The second liquid crystal 230 is sandwiched between the second TFT substrate 210 and the second opposing substrate 220. The second liquid crystal 230 is a positive nematic liquid crystal. The second liquid crystal 230 is initially aligned in the Y direction by an alignment film. When a voltage is applied, the second liquid crystal 230 rotates in a plane parallel to the main surface 210a of the second TFT substrate 210.

[0032] The third polarizer 232 is provided on the main surface 210b of the second TFT substrate 210. The transmission axis of the third polarizer 232 is arranged parallel to the initial 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 (polarizer on the light-emitting side of the second liquid crystal display panel 200) of the first liquid crystal display panel 100 are perpendicular to each other, and the second liquid crystal display panel 200 operates in a normally black mode.

[0033] The second driver circuit 236 is provided on the main surface 210a of the second TFT substrate 210. The second driver circuit 236 supplies voltage to the second scanning lines GL2, the second signal lines DL2, and the common lines based on a signal supplied from the display control unit 400.

[0034] The second scan line GL2, the second signal line DL2, and the dummy line DM will be described with reference to FIGS. 5 to 9. FIG. 6 shows the second scan line GL2, the second signal line DL2, the dummy line DM, and the sub-pixels 104 of the first liquid crystal display panel 100 in two second main pixels 202 as viewed from the front. FIG. 7 shows the second scan line GL2 and the sub-pixels 104 of the first liquid crystal display panel 100 in four second main pixels 202 as viewed from the front. In FIG. 7 and the following figures, for ease of understanding, one sub-pixel 104 of the first liquid crystal display panel 100 may be illustrated as a single rectangle. In the following figures, the bent second signal line DL2 may be illustrated as a straight line segment in association with the sub-pixels 104 being illustrated as rectangles. Furthermore, bending points P1 to P10 of the second scan line GL2, which will be described later, may be collectively referred to as bending point P.

[0035] The relationship between the second scan line GL2 and the sub-pixel 104 of the first liquid crystal display panel 100 will be described. As shown in FIGS. 5 and 6, the second scan line GL2 passes through the second main pixel 202. The second scan line GL2 bends at the +Y side end and the -Y side end of the second main pixel 202 and extends in a zigzag pattern in the X direction. In this embodiment, when the liquid crystal display device 10 is viewed from the front (i.e., when viewed from the +Z direction), the bending point P of the second scan line GL2 is located within the second main pixel 202, between the sub-pixels 104 of the first liquid crystal display panel 100, as shown in FIG.

[0036] The bending points P of the second scan line GL2 are arranged along the X direction (predetermined first direction) at a period equal to a predetermined number N of subpixels 104 of the first liquid crystal display panel 100. The predetermined number N is greater than the number of colors (3) of the subpixels 104 arranged in the X direction in one first main pixel 102 of the first liquid crystal display panel 100, and is a number that is not a natural number multiple of the number of colors (3) of the subpixels 104 repeatedly arranged along the X direction of the first liquid crystal display panel 100. Furthermore, where n is a natural number and m is a real number, the predetermined number N is expressed by the following formulas (1) and (2). In this embodiment, a case where the predetermined number N is 13 (n=4, m=1) will be described as shown in FIGS. 6 and 7. N = 3 × n + m (1) 0 <m<3 (2)

[0037] In this embodiment, as shown in FIG. 7, the second scanning line GL2 extends and bends over a distance equivalent to six or seven sub-pixels 104 (for example, seven sub-pixels between bend points P1 and P2, and six sub-pixels between bend points P2 and P3), and the bend points P1, P3, P5, and P7 aligned along the X direction and the bend points P2, P4, P6, and P8 aligned along the X direction are each aligned at a period equivalent to 13 sub-pixels 104. The arrangement of bending points P1 to P7 has a period of 13 sub-pixels 104, so that when bending point P1 is located between blue pixel 104B and red pixel 104R, bending point P3 is located between red pixel 104R and green pixel 104G, bending point P5 is located between green pixel 104G and blue pixel 104B, and bending point P7 is located between blue pixel 104B and red pixel 104R. Furthermore, in the arrangement of bending points P2 to P8, bending point P2 is located between red pixel 104R and green pixel 104G, bending point P4 is located between green pixel 104G and blue pixel 104B, bending point P6 is located between blue pixel 104B and red pixel 104R, and bending point P8 is located between red pixel 104R and green pixel 104G.

[0038] That is, in this embodiment, the colors of the sub-pixels 104 formed between the sub-pixels 104 arranged in the X direction at which the bending points P are located change sequentially. The bending points P block light incident on the sub-pixels 104 of the first liquid crystal display panel 100 from the backlight 300, and therefore the colors of the sub-pixels 104 blocked from the incident light by the bending points P change sequentially.

[0039] When the color of the sub-pixels 104 that are blocked from incident light by the bending point P changes sequentially, the decrease in the brightness of the colors of the sub-pixels 104 caused by the blocking of incident light (color bias resulting from color mixing) is averaged within the display area 101 of the first liquid crystal display panel 100, thereby suppressing color moiré in the liquid crystal display device 10.

[0040] In this embodiment, even when the liquid crystal display device 10 is viewed from the front and away from the -X side, the position of the bending point P changes uniformly from the front view, so that the colors of the sub-pixels 104 between the sub-pixels 104 aligned in the X direction and at which the bending point P is located change sequentially, as shown in Fig. 8 . Furthermore, even when the liquid crystal display device 10 is viewed from the front and away from the +X side, the colors of the sub-pixels 104 between the sub-pixels 104 aligned in the X direction and at which the bending point P is located change sequentially, as shown in Fig. 9 . Therefore, color moiré in the liquid crystal display device 10 can be suppressed even when the viewer's position changes.

[0041] The relationship between the second signal wirings DL2, the dummy lines DM, and the subpixels 104 of the first liquid crystal display panel 100 will now be described. When the liquid crystal display device 10 is viewed from the front, the second signal wirings DL2 are located between the subpixels 104 of the first liquid crystal display panel 100, as shown in FIG. 6 , and extend in the Y direction while bending along the contours of the subpixels 104 of the first liquid crystal display panel 100. The second signal wirings DL2 also overlap the first signal wirings DL1 of the first liquid crystal display panel 100. Like the second signal wirings DL2, the dummy lines DM are also located between the subpixels 104 of the first liquid crystal display panel 100, and extend in the Y direction while bending along the contours of the subpixels 104 of the first liquid crystal display panel 100. The dummy lines DM also overlap the first signal wirings DL1 of the first liquid crystal display panel 100.

[0042] 5, in this embodiment, two dummy lines DM are arranged between two second signal lines DL2, and the second signal lines DL2 and the dummy lines DM form a first light-shielding pattern 260 that blocks light incident from the backlight 300. When the liquid crystal display device 10 is viewed from the front, the second signal lines DL2 and the dummy lines DM (i.e., the first light-shielding pattern 260) are arranged every four sub-pixels 104, which is one more than the number of colors (three) of the sub-pixels 104 repeatedly arranged along the X direction, as shown in FIG.

[0043] 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 and is larger than one first main pixel 102 of the first liquid crystal display panel 100. Therefore, if only one second signal line DL2 corresponding to one second main pixel 202 is arranged as a light-blocking line extending in the Y direction, the spatial frequency of the dark line formed by the light-blocking line extending in the Y direction will be low, and the dark line will be easily noticeable by the viewer. In this embodiment, when the liquid crystal display device 10 is viewed from the front, the second signal line DL2 and dummy lines DM forming the first light-blocking pattern 260 are arranged every four sub-pixels 104 of the first liquid crystal display panel 100. This increases the spatial frequency of the dark line formed by the light-blocking line extending in the Y direction, making the dark line less noticeable to the viewer.

[0044] Next, the second scanning line GL2, the second signal line DL2, the dummy line DM, the switching element 240 of the second main pixel 202, the pixel electrode 250, and the common electrode CE will be described with reference to FIGS. 10 to 12. FIG. 10 is a plan view showing the second scanning line GL2, the second signal line DL2, the switching element 240, etc. FIG. 11 is a cross-sectional view of the switching element 240 and the contact hole CH shown in FIG. 10 taken along line AA, and FIG. 12 is a cross-sectional view of the second scanning line GL2 and the dummy line DM shown in FIG. 10 taken along line BB. For ease of understanding, the common electrode CE is omitted in FIG. 10, and hatching of the third insulating layer 278 is omitted in FIGS. 11 and 12.

[0045] 11, the second scanning lines GL2 are formed on the main surface 210a of the second TFT substrate 210 and are covered with a first insulating layer 272. The second signal lines DL2 are formed on the first insulating layer 272 and are covered with a second insulating layer 274. The second scanning lines GL2 and the second signal lines DL2 are made of a metal such as aluminum (Al) or molybdenum (Mo).

[0046] 11 and 12, the common electrode CE is formed on an organic interlayer film 276 formed on a second insulating layer 274. The common electrode CE is formed of, for example, ITO (Indium Tin Oxide). The common electrode CE is covered with a third insulating layer 278.

[0047] The switching element 240 is provided near the second scanning line GL2. As shown in Figures 10 and 11, the switching element 240 has a gate electrode 242, a semiconductor layer 244, a source electrode 246, and a drain electrode 248. The switching element 240 is, for example, a TFT element.

[0048] The gate electrode 242 is formed integrally with the second scanning line GL2 on the main surface 210a of the second TFT substrate 210. Like the second scanning line GL2, the gate electrode 242 is covered with a first insulating layer 272. The semiconductor layer 244 is provided in an island shape on the gate electrode 242 with the first insulating layer 272 interposed therebetween. The semiconductor layer 244 is formed of, for example, amorphous silicon. The source electrode 246 branches off from the second signal line DL2 and is formed on the semiconductor layer 244. The drain electrode 248 extends from above the semiconductor layer 244 along the second scanning line GL2. The drain electrode 248 is connected to the pixel electrode 250 via a contact hole CH that penetrates the third insulating layer 278, the organic interlayer film 276, and the second insulating layer 274. Like the second signal line DL2, the source electrode 246 and the drain electrode 248 are formed of a metal such as aluminum (Al) or molybdenum (Mo). Furthermore, the semiconductor layer 244, the source electrode 246, and the drain electrode 248 are covered with a second insulating layer 274, as shown in FIG.

[0049] As shown in FIG. 12, the dummy lines DM are formed on the organic interlayer film 276 and covered with the common electrode CE. The dummy lines DM are formed from a metal such as aluminum (Al) or molybdenum (Mo). The dummy lines DM do not need to be conductive and may be formed from an organic material having light-shielding properties. In this embodiment, a dummy element 240D corresponding to a dummy of the switching element 240 is formed in a position facing the switching element 240, similar to the dummy lines DM, as shown in FIGS. 10 and 12.

[0050] 11 and 12, the first insulating layer 272 covers the second scan line GL2 and the gate electrode 242 of the switching element 240. The second insulating layer 274 covers the semiconductor layer 244, source electrode 246, drain electrode 248 of the switching element 240, the second signal line DL2, and the first insulating layer 272. The organic interlayer film 276 is made of a photosensitive resin and is formed on the second insulating layer 274. The third insulating layer 278 covers the common electrode CE and the organic interlayer film 276. The first insulating layer 272, the second insulating layer 274, and the third insulating layer 278 are made of silicon nitride (SiNx), silicon oxide (SiOx), or the like.

[0051] The pixel electrode 250 is connected to the switching element 240 via a contact hole CH. The pixel electrode 250 has a comb-like shape, and the teeth 252 are inclined with respect to the Y direction. The pixel electrode 250 is made of, for example, ITO.

[0052] (backlight) 1, the backlight 300 is disposed on the rear side (-Z side) of the second liquid crystal display panel 200. The backlight 300 is, for example, a direct-type backlight. The backlight 300 includes white LED (Light Emitting Diode) elements, a reflective sheet, a diffusion sheet, etc. (none of which are shown).

[0053] (Display control unit) The display control unit 400 controls the display of the first liquid crystal display panel 100 and the second liquid crystal display panel 200. As shown in Fig. 13 , the display control unit 400 includes an image data distribution unit 410, a first image signal generation unit 420, a second image luminance signal generation unit 430, and a second image signal generation unit 440.

[0054] The image data distribution unit 410 distributes the input image data to the first image signal generation unit 420 and the second image luminance signal generation unit 430 .

[0055] The first image signal generation unit 420 generates a color image to be displayed on the first liquid crystal display panel 100 from the input image data distributed by the image data distribution unit 410. Specifically, a first gradation conversion unit 422 of the first image signal generation unit 420 performs gradation conversion to convert the distributed input image data into color image data having brightness-gradation characteristics suitable for the first liquid crystal display panel 100. For example, a lookup table in which input / output relationships are preset is used for data conversion. The first image signal generation unit 420 transmits a color image signal representing the generated color image to the first driver circuit 136 of the first liquid crystal display panel 100.

[0056] The second image luminance signal generation unit 430 generates a luminance signal for generating a monochrome image to be displayed on the second liquid crystal display panel 200 from the input image data distributed by the image data distribution unit 410. The second image luminance signal generation unit 430 calculates the luminance level of one second main pixel 202 of the second liquid crystal display panel 200 from, for example, the average value, frequent value, minimum value, maximum value, etc. of the red, green, and blue gradation values ​​of the 16 first main pixels 102 of the first liquid crystal display panel 100, onto which light emitted from one second main pixel 202 of the second liquid crystal display panel 200 is incident. The calculated luminance level may be a gradation value. The second image luminance signal generation unit 430 transmits a luminance signal representing the calculated luminance level to the second image signal generation unit 440.

[0057] The second image signal generation unit 440 generates a monochrome image to be displayed on the second LCD panel 200 based on the luminance signal transmitted from the second image luminance signal generation unit 430. The second image signal generation unit 440 generates a monochrome image by, for example, performing averaging and gradation conversion. Specifically, the calculation unit 442 of the second image signal generation unit 440 averages the luminance levels of second main pixels 202 located within a predetermined distance from the second main pixel 202 of interest, for example, by performing a weighted average based on the distance from the second main pixel 202 of interest. This allows the second image signal generation unit 440 to generate a monochrome image with blurred edges. Furthermore, the second gradation conversion unit 444 of the second image signal generation unit 440 generates monochrome image data having luminance-gradation characteristics suitable for the second LCD panel 200. The configuration of the second gradation conversion unit 444 is similar to that of the first gradation conversion unit 422 of the first image signal generation unit 420.

[0058] 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 due to the calculation of brightness levels, averaging processing, etc. performed by the second image brightness signal generation unit 430. Therefore, the display control unit 400 is provided with a synchronization circuit (not shown) to synchronize the output of the monochrome image signal and the color image signal. The synchronization circuit causes a monochrome image corresponding to the color image of the first liquid crystal display panel 100 to be displayed on the second liquid crystal display panel 200, so that an appropriate color image is displayed on the liquid crystal display device 10.

[0059] The display control unit 400 is configured with a CPU (Central Processing Unit), a memory, etc. The functions of the display control unit 400 are realized, for example, by the CPU executing a program stored in the memory.

[0060] As described above, the bending points P of the second scan line GL2 are arranged along the X direction (the predetermined first direction) by a predetermined number N (N=13 in this embodiment), which is greater than the number of colors (3) of the sub-pixels 104 arranged in the X direction in one first main pixel 102 of the first liquid crystal display panel 100 and is not a natural number multiple of the number of colors (3) of the sub-pixels 104 repeatedly arranged along the X direction of the first liquid crystal display panel 100. Therefore, the colors of the sub-pixels 104 whose incident light is blocked by the bending points P change sequentially. As a result, the decrease in the luminance of the colors of the sub-pixels 104 caused by the blocking of incident light (color bias resulting from color mixing) is averaged within the display region 101 of the first liquid crystal display panel 100, thereby suppressing color moiré in the liquid crystal display device 10. Furthermore, color moiré in the liquid crystal display device 10 can be suppressed even when the viewer's position changes.

[0061] Furthermore, first light-shielding patterns 260 formed from second signal wiring DL2 and dummy lines DM and extending in the Y direction (predetermined second direction) are arranged for every four sub-pixels 104, which is one more than the number of colors (3) of the sub-pixels 104 repeatedly arranged along the X direction. This increases the spatial frequency of dark lines formed from wiring having light-shielding properties extending in the Y direction, making dark lines appearing in the liquid crystal display device 10 less noticeable to the viewer.

[0062] <Embodiment 2> In the first embodiment, the bending points P of the second scanning line GL2 are arranged along the X direction at a period corresponding to 13 sub-pixels 104 (n=3, m=1) of the first liquid crystal display panel 100. The predetermined number N may be 14 (n=3, m=2). The other configurations of this embodiment are the same as those of the first embodiment.

[0063] 14, for example, the second scanning line GL2 extends and bends over a distance corresponding to seven sub-pixels 104. Furthermore, bending points P1, P3, P5, and P7 aligned along the X direction and bending points P2, P4, and P6 aligned along the X direction are each aligned at a period corresponding to 14 sub-pixels 104.

[0064] The arrangement of bending points P1 to P7 is at a period of 14 sub-pixels 104, so when bending point P1 is located between blue pixel 104B and red pixel 104R, bending point P3 is located between green pixel 104G and blue pixel 104B, bending point P5 is located between red pixel 104R and green pixel 104G, and bending point P7 is located between blue pixel 104B and red pixel 104R. In the arrangement of bending points P2, P4, and P6, bending point P2 is located between red pixel 104R and green pixel 104G, bending point P4 is located between blue pixel 104B and red pixel 104R, and bending point P6 is located between green pixel 104G and blue pixel 104B.

[0065] That is, in this embodiment, as in embodiment 1, the colors of the sub-pixels 104 formed between the sub-pixels 104 arranged in the X direction at the bending points P change sequentially. Therefore, in this embodiment as well, the decrease in the luminance of the colors of the sub-pixels 104 (color bias resulting from color mixing) is averaged within the display region 101 of the first liquid crystal display panel 100, and color moiré in the liquid crystal display device 10 can be suppressed.

[0066] As described above, even if the predetermined number N is 14 (n=3, m=2), color moiré in the liquid crystal display device 10 can be suppressed.

[0067] <Embodiment 3> In the first embodiment, the first main pixel 102 of the first liquid crystal display panel 100 is formed of a red pixel 104R, a green pixel 104G, and a blue pixel 104B, which are aligned in the X direction. The first main pixel 102 of the first liquid crystal display panel 100 may be formed of a red pixel 104R, a green pixel 104G, a blue pixel 104B, and a white pixel 104W, which are aligned in the X direction, as shown in Fig. 15. The white pixel 104W emits white light.

[0068] In this embodiment, the first main pixels 102 are aligned in the X and Y directions, and the red pixel 104R, green pixel 104G, blue pixel 104B, and white pixel 104W of the first main pixels 102 are aligned in the X direction, so the number of colors of the sub-pixels 104 aligned in the X direction in one first main pixel 102 is four. In addition, the number of colors of the sub-pixels 104 aligned repeatedly along the X direction is also four. The rest of the configuration of the first liquid crystal display panel 100 of this embodiment is the same as that of embodiment 1.

[0069] In the second liquid crystal display panel 200 of this embodiment, two dummy lines DM are arranged between two second signal lines DL2, as shown in Fig. 15. When the liquid crystal display device 10 is viewed from the front, the second signal lines DL2 and the dummy lines DM (i.e., the first light-shielding patterns 260) are arranged every five sub-pixels 104, which is one more than the four colors of the sub-pixels 104 repeatedly arranged along the X direction, as shown in Fig. 15.

[0070] In the second liquid crystal display panel 200 of this embodiment, the bending points P of the second scan lines GL2 are also arranged along the X direction at a period equal to the predetermined number N of subpixels 104 of the first liquid crystal display panel 100. The predetermined number N in this embodiment is greater than the number (four) of colors of the subpixels 104 arranged in the X direction in one first main pixel 102 of the first liquid crystal display panel 100, and is not a natural number multiple of the number (four) of colors of the subpixels 104 repeatedly arranged along the X direction of the first liquid crystal display panel 100. Furthermore, where n is a natural number and m is a real number, the predetermined number N is expressed by the following formulas (3) and (4). In this embodiment, a case where the predetermined number N is 15 (n=3, m=3), as shown in FIG. 15, will be described. Other configurations of the second liquid crystal display panel 200 of this embodiment, the backlight 300, and the display control unit 400 are the same as those in the first embodiment. N = 4 × n + m (3) 0 <m<4 (4)

[0071] 15, the second scanning line GL2 extends and bends by seven or eight sub-pixels (for example, seven sub-pixels between bend points P1 and P2, and eight sub-pixels between bend points P2 and P3). The bend points P1, P3, P5, P7, and P9 aligned along the X direction and the bend points P2, P4, P6, and P8 aligned along the X direction are each aligned at a period of 15 sub-pixels 104.

[0072] The arrangement of bending points P1 to P9 is at a period of 15 sub-pixels 104, so when bending point P1 is located between red pixel 104R and green pixel 104G, bending point P3 is located between white pixel 104W and red pixel 104R, and bending point P5 is located between blue pixel 104B and white pixel 104W. Furthermore, bending point P7 is located between green pixel 104G and blue pixel 104B, and bending point P9 is located between red pixel 104R and green pixel 104G.

[0073] In the arrangement of bending points P2 to P8, bending point P2 is located between white pixel 104W and red pixel 104R, bending point P4 is located between blue pixel 104B and white pixel 104W, bending point P6 is located between green pixel 104G and blue pixel 104B, and bending point P8 is located between red pixel 104R and green pixel 104G.

[0074] As described above, in this embodiment, as in embodiment 1, the colors of the sub-pixels 104 formed between the sub-pixels 104 arranged in the X direction at the bending points P change sequentially. Therefore, in this embodiment as well, the decrease in the luminance of the colors of the sub-pixels 104 (color bias resulting from color mixing) is averaged within the display region 101 of the first liquid crystal display panel 100, and color moiré in the liquid crystal display device 10 can be suppressed.

[0075] Furthermore, in this embodiment, the second signal wiring DL2 and the dummy line DM (first light-shielding pattern 260) are arranged for every five sub-pixels 104 of the first liquid crystal display panel 100, thereby increasing the spatial frequency of the dark lines formed from the light-shielding wiring extending in the Y direction, making the dark lines less noticeable to the viewer.

[0076] <Embodiment 4> In the third embodiment, the red pixel 104R, the green pixel 104G, the blue pixel 104B, and the white pixel 104W that form one first main pixel 102 of the first liquid crystal display panel 100 are aligned in a row in the X direction. The red pixel 104R, the green pixel 104G, the blue pixel 104B, and the white pixel 104W that form one first main pixel 102 of the first liquid crystal display panel 100 may also be aligned in two rows in the X direction.

[0077] In this embodiment, the configuration of the first main pixel 102 of the first liquid crystal display panel 100 and the bending of the second scan line GL2 of the second liquid crystal display panel 200 are different from the configuration of the first main pixel 102 and the bending of the second scan line GL2 in embodiment 3. The other configurations of the liquid crystal display device 10 are similar to those of embodiment 1 and embodiment 3.

[0078] 16, the first liquid crystal display panel 100 of this embodiment has first main pixels 102a and first main pixels 102b as first main pixels 102. The first main pixels 102a and the first main pixels 102b are arranged alternately in the X direction. In the Y direction, either the first main pixels 102a or the first main pixels 102b are arranged in a row.

[0079] In the first main pixel 102a, the red pixel 104R and the green pixel 104G are arranged in order in the first column in the X direction, and the blue pixel 104B and the white pixel 104W are arranged in order in the second column in the X direction. In the first main pixel 102b, the blue pixel 104B and the white pixel 104W are arranged in order in the first column in the X direction, and the red pixel 104R and the green pixel 104G are arranged in order in the second column in the X direction.

[0080] In this embodiment, the first main pixels 102a and the first main pixels 102b are arranged alternately in the X direction, with red pixels 104R and green pixels 104G arranged in the first column of the first main pixels 102a, and blue pixels 104B and white pixels 104W arranged in the first column of the first main pixels 102b. Also, the blue pixels 104B and white pixels 104W are arranged in the second column of the first main pixels 102a, and the red pixels 104R and green pixels 104G are arranged in the second column of the first main pixels 102b. Therefore, in this embodiment, the number of colors of the sub-pixels 104 arranged in the X direction in one first main pixel 102a, 102b is two (a red pixel 104R and a green pixel 104G, or a blue pixel 104B and a white pixel 104W), and the number of colors of the sub-pixels 104 arranged repeatedly along the X direction is four (a red pixel 104R, a green pixel 104G, a blue pixel 104B, and a white pixel 104W).

[0081] In this embodiment, one second main pixel 202 of the second liquid crystal display panel 200 corresponds to 16 first main pixels 102 (8 in the X direction and 2 in the Y direction) of the first liquid crystal display panel 100, and one second main pixel 202 of the second liquid crystal display panel 200 emits light to the 16 first main pixels 102 of the first liquid crystal display panel 100.

[0082] In the second liquid crystal display panel 200 of this embodiment, the bending points P of the second scan line GL2 are also arranged along the X direction at a period equal to the predetermined number N of subpixels 104 of the first liquid crystal display panel 100. In this embodiment, the predetermined number N is greater than the number of colors (2) of the subpixels 104 arranged in the X direction in one first main pixel 102 of the first liquid crystal display panel 100, and is a number that is not a natural number multiple of the number of colors (4) of the subpixels 104 repeatedly arranged along the X direction of the first liquid crystal display panel 100. In this case, where n is a natural number and m is a real number, the predetermined number N satisfies the following formulas (5) and (6). In this embodiment, a case where the predetermined number N is 13 (n=6, m=1), as shown in FIG. 17, will be described. N = 2 × n + m (5) 0 <m<2 (6)

[0083] 17, the second scanning line GL2 extends six or seven times and bends (for example, seven times between bend points P1 and P2, and six times between bend points P2 and P3). The bend points P1, P3, P5, P7, and P9 aligned along the X direction and the bend points P2, P4, P6, P8, and P10 aligned along the X direction are each aligned at a period of 13 sub-pixels 104.

[0084] In the arrangement of bending points P1 to P9, bending point P1 is located between blue pixel 104B and white pixel 104W, bending point P3 is located between white pixel 104W and red pixel 104R, and bending point P5 is located between red pixel 104R and green pixel 104G. Furthermore, bending point P7 is located between green pixel 104G and blue pixel 104B, and bending point P9 is located between blue pixel 104B and white pixel 104W.

[0085] In the arrangement of bending points P2 to P10, bending point P2 is located between white pixel 104W and red pixel 104R, bending point P4 is located between red pixel 104R and green pixel 104G, bending point P6 is located between green pixel 104G and blue pixel 104B, bending point P8 is located between blue pixel 104B and white pixel 104W, and bending point P10 is located between white pixel 104W and red pixel 104R.

[0086] As described above, in this embodiment, as in the first embodiment, the colors of the sub-pixels 104 formed between the sub-pixels 104 arranged in the X direction at the bending points P change sequentially. Therefore, in this embodiment, too, the decrease in the luminance of the colors of the sub-pixels 104 (color bias resulting from color mixing) is averaged within the display region 101 of the first liquid crystal display panel 100, thereby suppressing color moiré in the liquid crystal display device 10. Note that in this embodiment, as in the third embodiment, the second signal lines DL2 and the dummy lines DM (first light-shielding patterns 260) are arranged for every five sub-pixels 104 of the first liquid crystal display panel 100.

[0087] <Embodiment 5> As in embodiment 4, when the predetermined number N is greater than 2, which is the number of colors of the sub-pixels 104 arranged in the X direction in one first main pixel 102 of the first liquid crystal display panel 100, and is a number that is not a natural number multiple of 4, which is the number of colors of the sub-pixels 104 repeatedly arranged along the X direction of the first liquid crystal display panel 100, the following formula (7) and the above formula (6) may be satisfied. In this embodiment, a case where the predetermined number N is 14 (n=3, m=1, n is a natural number, m is a real number) as shown in FIG. N = 2 × (2 × n + m) (7)

[0088] When the predetermined number N is 14, for example, the second scanning line GL2 extends seven times and bends, as shown in Fig. 18. The bend points P1, P3, P5, P7, and P9 aligned along the X direction and the bend points P2, P4, P6, P8, and P10 aligned along the X direction are each aligned at a period corresponding to 14 sub-pixels 104.

[0089] In the arrangement of bending points P1 to P9, bending point P1 is located between blue pixel 104B and white pixel 104W, bending point P3 is located between red pixel 104R and green pixel 104G, and bending point P5 is located between blue pixel 104B and white pixel 104W. Furthermore, bending point P7 is located between red pixel 104R and green pixel 104G, and bending point P9 is located between blue pixel 104B and white pixel 104W.

[0090] In the arrangement of bending points P2 to P10, bending point P2 is located between white pixel 104W and red pixel 104R, bending point P4 is located between green pixel 104G and blue pixel 104B, and bending point P6 is located between white pixel 104W and red pixel 104R. Furthermore, bending point P8 is located between green pixel 104G and blue pixel 104B, and bending point P10 is located between white pixel 104W and red pixel 104R.

[0091] As described above, in this embodiment, as in the first to fourth embodiments, the colors of the sub-pixels 104 formed between the sub-pixels 104 arranged in the X direction at the bending points P change sequentially. Therefore, in this embodiment, too, the decrease in the luminance of the colors of the sub-pixels 104 (color bias resulting from color mixing) is averaged within the display region 101 of the first liquid crystal display panel 100, thereby suppressing color moiré in the liquid crystal display device 10. Note that in this embodiment, as in the third and fourth embodiments, the second signal lines DL2 and the dummy lines DM (first light-shielding patterns 260) are arranged for every five sub-pixels 104 of the first liquid crystal display panel 100.

[0092] <Embodiment 6> In the first to fifth embodiments, the second signal lines DL2 and dummy lines DM (first light-shielding patterns 260) of the second liquid crystal display panel 200 are located between the sub-pixels 104 of the first liquid crystal display panel 100, and are bent and extend in the Y direction along the contours of the sub-pixels 104 of the first liquid crystal display panel 100. The second signal lines DL2 and dummy lines DM of the second liquid crystal display panel 200 may be inclined with respect to the Y direction and straddle the sub-pixels 104 of the first liquid crystal display panel 100.

[0093] The configuration of the first liquid crystal display panel 100 of this embodiment is similar to the configuration of the first liquid crystal display panel 100 of Embodiment 1. Moreover, except for the second signal lines DL2 and the dummy lines DM, the configuration of the second liquid crystal display panel 200 of this embodiment is similar to the configuration of the second liquid crystal display panel 200 of Embodiment 1. Here, the second signal lines DL2 and the dummy lines DM of the second liquid crystal display panel 200 will be described with reference to FIG. 19 .

[0094] In this embodiment, two dummy lines DM are arranged between two second signal lines DL2, similar to the second signal lines DL2 and dummy lines DM in embodiment 1. Furthermore, the second signal lines DL2 and dummy lines DM in this embodiment are arranged at a period corresponding to four sub-pixels 104 of the first liquid crystal display panel 100, and form a second light-shielding pattern 280 that blocks light incident from the backlight 300.

[0095] 19 , in this embodiment, the second signal wiring DL2 and the dummy line DM (second light-shielding pattern 280) are inclined at an acute angle with respect to the +Y direction across two columns of sub-pixels 104 extending in the Y direction of the first liquid crystal display panel 100 for each second main pixel 202 of the second liquid crystal display panel 200. The inclined portion 282 inclined at an acute angle with respect to the +Y direction is inclined by one sub-pixel 104 across four sub-pixels 104 across two columns of sub-pixels 104 extending in the Y direction. A flat portion 284 parallel to the X direction connects the two inclined portions 282.

[0096] In this embodiment, the second light-shielding pattern 280 (the second signal wiring DL2 and the dummy line DM) is inclined with respect to the Y direction across two columns of sub-pixels 104 extending in the Y direction, so that even if the viewer's position changes, the color of the sub-pixels 104 of the first liquid crystal display panel 100 that are blocked by the second light-shielding pattern 280 does not change much. Therefore, color moiré in the liquid crystal display device 10 that occurs when the viewer's position changes can be suppressed.

[0097] <Embodiment 7> In the first to sixth embodiments, the second main pixel 202 of the second liquid crystal display panel 200 has a rectangular shape. The shape of the second main pixel 202 of the second liquid crystal display panel 200 is not limited to a rectangular shape.

[0098] The first liquid crystal display panel 100, backlight 300, and display control unit 400 of this embodiment have the same configurations as those of embodiment 1. Here, the second liquid crystal display panel 200 of this embodiment will be described.

[0099] 20, in the second liquid crystal display panel 200 of this embodiment, second main pixels 202 each having an asymmetric V shape bent along the second scan line GL2 are arranged in a matrix in the X and Y directions. As shown in FIG. 21, each second main pixel 202 of the second liquid crystal display panel 200 corresponds to a plurality of sub-pixels 104 of the first liquid crystal display panel 100, and each second main pixel 202 of the second liquid crystal display panel 200 emits light to the plurality of sub-pixels 104 of the first liquid crystal display panel 100.

[0100] The second main pixel 202 has an asymmetric V-shape. The +Y and -Y sides of the outer shape (asymmetric V-shape) of the second main pixel 202 are parallel to the second scan line GL2, as shown in FIG. 21 . Furthermore, the +Y and -Y sides of the outer shape of the second main pixel 202 are located between adjacent second scan lines GL2, as shown in FIG. 20 . The +X and -X sides of the outer shape of the second main pixel 202 are bent along the outer shape of the sub-pixel 104 of the first liquid crystal display panel 100, as shown in FIG. 21 . Furthermore, the +X and -X sides of the outer shape of the second main pixel 202 overlap the first signal line DL1 of the first liquid crystal display panel 100.

[0101] The second scan line GL2 of this embodiment, like the second scan line GL2 of embodiment 1, passes through the second main pixel 202 and extends in a zigzag pattern in the X direction. Furthermore, a bending point P of the second scan line GL2 is located between the sub-pixels 104 of the first liquid crystal display panel 100 within the second main pixel 202.

[0102] The second scan lines GL2 of this embodiment, like the second scan lines GL2 of the first embodiment, are arranged along the X direction at a period equal to the predetermined number N of subpixels 104 of the first liquid crystal display panel 100. The predetermined number N is greater than the number of colors of the subpixels 104 arranged in the X direction in one first main pixel 102 of the first liquid crystal display panel 100 (3), and is a number that is not a natural number multiple of the number of colors of the subpixels 104 repeatedly arranged along the X direction of the first liquid crystal display panel 100 (3). Furthermore, the second scan lines GL2 satisfy the above formulas (1) and (2). For example, when the predetermined number N is 16 (n=5, m=1), as shown in FIG. 22 , the colors of the subpixels 104 whose incident light is blocked by the bending point P change sequentially. Therefore, in this embodiment as well, the decrease in the luminance of the colors of the subpixels 104 (color bias resulting from color mixing) is averaged within the display region 101 of the first liquid crystal display panel 100, thereby suppressing color moiré in the liquid crystal display device 10. In FIG. 22, one sub-pixel 104 of the first liquid crystal display panel 100 is illustrated as one rectangle.

[0103] 21, when the liquid crystal display device 10 is viewed from the front, the second signal wirings DL2 of this embodiment are located between the subpixels 104 of the first liquid crystal display panel 100, and bend along the contours of the subpixels 104 of the first liquid crystal display panel 100, extending in the Y direction. In this embodiment, the second liquid crystal display panel 200 does not include dummy lines DM, and the second signal wirings DL2 are arranged every four subpixels 104 of the first liquid crystal display panel 100, forming first light-shielding patterns 260. In this embodiment, too, the second signal wirings DL2 (first light-shielding patterns 260) are arranged every four subpixels 104 of the first liquid crystal display panel 100, and therefore, as in the first embodiment, the spatial frequency of the dark lines formed by wirings having light-shielding properties extending in the Y direction can be increased, making the dark lines less noticeable to the viewer.

[0104] In this embodiment, as shown in Fig. 23, one second main pixel 202 has three switching elements 240 and three pixel electrodes 250. One second main pixel 202 is driven by voltages (signals) from one second scan line GL2 and three second signal lines DL2. Note that in Fig. 23, for ease of understanding, the switching elements 240 are shown by dashed lines and the pixel electrodes 250 are shown by solid lines.

[0105] The pixel electrode 250 has a trunk electrode 254 and a linear electrode 256. The trunk electrode 254 is provided on the second scanning line GL2 and extends along the second scanning line GL2. The trunk electrode 254 is connected to the switching element 240 via a contact hole (not shown).

[0106] The linear electrodes 256 branch off from the main electrodes 254 and extend in the +Y direction or the −Y direction. Similar to the second signal lines DL2, the linear electrodes 256 are bent to fit the contours of the sub-pixels 104 of the first liquid crystal display panel 100.

[0107] Other configurations of the second liquid crystal display panel 200 of this embodiment are the same as those of the first embodiment.

[0108] As described above, the shape of the second main pixel 202 of the second liquid crystal display panel 200 is not limited to a rectangle. In this embodiment, as in the first embodiment, color moiré in the liquid crystal display device 10 can be suppressed.

[0109] <Modification> Although the embodiments have been described above, various modifications can be made to the present disclosure without departing from the spirit and scope of the present disclosure.

[0110] For example, in the embodiment, the first liquid crystal display panel 100 and the second liquid crystal display panel 200 are in-plane switching liquid crystal display panels. The first liquid crystal display panel 100 and the second liquid crystal display panel 200 may be in a VA (Vertical Alignment) mode, a TN (Twisted Nematic) mode, or the like. Furthermore, the display area 101 of the first liquid crystal display panel 100 is not limited to a rectangular shape and may be non-rectangular.

[0111] In this embodiment, the first polarizer 132 of the first liquid crystal display panel 100 also serves as the polarizer on the light exit side of the second liquid crystal display panel 200. The second liquid crystal display panel 200 may include a polarizer on the main surface 220b of the second opposing substrate 220.

[0112] In the first to sixth embodiments, 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. The number of first main pixels 102 of the first liquid crystal display panel 100 to which one second main pixel 202 of the second liquid crystal display panel 200 corresponds is arbitrary.

[0113] In the embodiment, the bending point P of the second scanning line GL2 is located between the sub-pixels 104 of the first liquid crystal display panel 100, but the bending point P of the second scanning line GL2 does not have to be located between the sub-pixels 104.

[0114] In the sixth embodiment, one second main pixel 202 of the second liquid crystal display panel 200 corresponds to 16 first main pixels 102 (four in the X direction and four in the Y direction) of the first liquid crystal display panel 100, and the inclined portion 282 of the second light-shielding pattern 280 (the second signal line DL2 and the dummy line DM) is inclined by one subpixel 104 across four subpixels 104, straddling two columns of subpixels 104 extending in the Y direction. It is sufficient that the second light-shielding pattern 280 is inclined with respect to the Y direction for each second main pixel 202 of the second liquid crystal display panel 200, straddling two columns of subpixels 104 extending in the Y direction of the first liquid crystal display panel 100. For example, as shown in FIG. 24, one second main pixel 202 of the second liquid crystal display panel 200 corresponds to four first main pixels 102 (two in the X direction and two in the Y direction) of the first liquid crystal display panel 100, and the second light-shielding pattern 280 (inclined portion 282) may be inclined by one subpixel 104 across two subpixels 104 across a column of two subpixels 104 extending in the Y direction.

[0115] Although the preferred embodiments have been described above, the present disclosure is not limited to such specific embodiments, and the present disclosure includes the inventions described in the claims and their equivalents. [Explanation of symbols]

[0116] 10 Liquid crystal display device, 50 Panel section, 100 First liquid crystal display panel, 101 Display area, 102, 102a, 102b First main pixel, 104 Sub-pixel, 104a, 104b Domain, 104R Red pixel, 104G Green pixel, 104B Blue pixel, 104W White pixel, 110 First TFT substrate, 110a, 110b Main surface, 120 First opposing substrate, 120a, 120b Main surface, 122 Color filter, 130 First liquid crystal, 132 First polarizer, 134 Second polarizer, 136 First driver circuit, 138 Sealant, 150 Adhesive layer, 200 Second liquid crystal display panel, 202 Second main pixel, 210 Second TFT substrate, 210a, 210b Main surface, 220 Second opposing substrate, 220a, 220b, main surface, 230, second liquid crystal, 232, third polarizing plate, 236, second driver circuit, 238, sealing material, 240, switching element, 240D, dummy element, 242, gate electrode, 244, semiconductor layer, 246, source electrode, 248, drain electrode, 250, pixel electrode, 252, tooth portion, 254, main electrode, 256, linear electrode, 260, first light-shielding pattern, 272, first insulating layer, 274, second insulating layer, 276, organic interlayer film, 278, third insulating layer, 280, second light-shielding pattern, 282, inclined portion, 284, flat portion, 300, backlight, 400, display control unit, 410, image data distribution unit, 420, first image signal generation unit, 422, first gradation conversion unit, 430, second image luminance signal generation unit, 440 Second image signal generating unit, 442 calculation unit, 444 second gradation conversion unit, BM black matrix, CE common electrode, CH contact hole, DL1 first signal wiring, DL2 second signal wiring, DM dummy line, GL1 first scanning wiring, GL2 second scanning wiring, P, P1 to P10 bending points

Claims

1. a first liquid crystal display panel for displaying a color image, in which first main pixels each having 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 first direction; a second liquid crystal display panel located on the opposite side of the first liquid crystal display panel from the viewer side and overlapping the first liquid crystal display panel, the second main pixels being arranged in a matrix in the predetermined first direction and the predetermined second direction, and displaying a monochrome image; the second liquid crystal display panel has scanning lines extending in a zigzag pattern in the predetermined first direction, the period of the bend points of the scanning lines of the second liquid crystal display panel arranged along the predetermined first direction is equal to a predetermined number of the sub-pixels of the first liquid crystal display panel; the predetermined number is greater than the number of colors of the sub-pixels arranged in the predetermined first direction in one of the first main pixels of the first liquid crystal display panel, and is not a natural number multiple of the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel, the first liquid crystal display panel has first signal lines arranged between the sub-pixels and extending in the predetermined second direction; the second liquid crystal display panel has a first light-shielding pattern extending in the predetermined second direction; the first light-shielding pattern is formed of second signal wiring extending in the predetermined second direction, or the second signal wiring and a dummy line extending in the predetermined second direction; When viewed from the front, the first light-shielding patterns are arranged for each of the sub-pixels of which the number is one greater than the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel, and overlap the first signal wiring of the first liquid crystal display panel. LCD display device.

2. A first liquid crystal display panel that displays a color image, in which first main pixels having 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; a second liquid crystal display panel located on the opposite side of the first liquid crystal display panel from the viewer side and overlapping the first liquid crystal display panel, the second main pixels being arranged in a matrix in the predetermined first direction and the predetermined second direction, and displaying a monochrome image; the second liquid crystal display panel has scanning lines extending in a zigzag pattern in the predetermined first direction, the period of the bend points of the scanning lines of the second liquid crystal display panel arranged along the predetermined first direction is equal to a predetermined number of the sub-pixels of the first liquid crystal display panel; the predetermined number is greater than the number of colors of the sub-pixels arranged in the predetermined first direction in one of the first main pixels of the first liquid crystal display panel, and is not a natural number multiple of the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel, When the number of colors of the sub-pixels arranged in the predetermined first direction in one first main pixel of the first liquid crystal display panel and the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel are four, and n is a natural number, m is a real number, and N is the predetermined number, N=4×n+m (3) 0 < m < 4 (4) fulfill, LCD display device.

3. A first liquid crystal display panel that displays a color image, in which first main pixels having 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; a second liquid crystal display panel located on the opposite side of the first liquid crystal display panel from the viewer side and overlapping the first liquid crystal display panel, the second main pixels being arranged in a matrix in the predetermined first direction and the predetermined second direction, and displaying a monochrome image; the second liquid crystal display panel has scanning lines extending in a zigzag pattern in the predetermined first direction, the period of the bend points of the scanning lines of the second liquid crystal display panel arranged along the predetermined first direction is equal to a predetermined number of the sub-pixels of the first liquid crystal display panel; the predetermined number is greater than the number of colors of the sub-pixels arranged in the predetermined first direction in one of the first main pixels of the first liquid crystal display panel, and is not a natural number multiple of the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel, In one first main pixel of the first liquid crystal display panel, the number of colors of the sub-pixels arranged in the predetermined first direction is two, the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel is four, and n is a natural number, m is a real number, and N is the predetermined number, N=2×n+m (5) 0 < m < 2 (6) fulfill, LCD display device.

4. A first liquid crystal display panel that displays a color image, in which first main pixels having 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; a second liquid crystal display panel located on the opposite side of the first liquid crystal display panel from the viewer side and overlapping the first liquid crystal display panel, the second main pixels being arranged in a matrix in the predetermined first direction and the predetermined second direction, and displaying a monochrome image; the second liquid crystal display panel has scanning lines extending in a zigzag pattern in the predetermined first direction, the period of the bend points of the scanning lines of the second liquid crystal display panel arranged along the predetermined first direction is equal to a predetermined number of the sub-pixels of the first liquid crystal display panel; the predetermined number is greater than the number of colors of the sub-pixels arranged in the predetermined first direction in one of the first main pixels of the first liquid crystal display panel, and is not a natural number multiple of the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel, In one first main pixel of the first liquid crystal display panel, the number of colors of the sub-pixels arranged in the predetermined first direction is two, the number of colors of the sub-pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel is four, and n is a natural number, m is a real number, and N is the predetermined number, N=2×(2×n+m) (7) 0 < m < 2 (8) fulfill, LCD display device.

5. the second liquid crystal display panel has a second light-shielding pattern extending in the predetermined second direction, the second light-shielding pattern is formed of a second signal wiring extending in the predetermined second direction, or the second signal wiring and a dummy line extending in the predetermined second direction, and is inclined with respect to the predetermined second direction for each second main pixel, extending in the predetermined second direction and straddling two columns of the sub-pixels adjacent in the predetermined first direction of the first liquid crystal display panel; 5. The liquid crystal display device according to claim 2.

6. a bending point of the scanning line of the second liquid crystal display panel is located within the second main pixel of the second liquid crystal display panel; The liquid crystal display device according to claim 1 .

7. the second main pixel of the second liquid crystal display panel has a shape bent along the scanning line of the second liquid crystal display panel; The liquid crystal display device according to claim 1 .

Images