Display device

Abstract

A dual-cell display device with high transmittance and reduced moiré across the entire display screen is provided. The display device comprises: a color display element having a plurality of pixels including sub-pixels of different colors arranged in row and column directions; and a liquid crystal display panel stacked on the color display element. The liquid crystal display panel comprises a TFT substrate, an opposing substrate, and a liquid crystal layer sandwiched between the TFT substrate and the opposing substrate. The TFT substrate comprises: a plurality of first bus lines extending in a first direction; a plurality of second bus lines extending in a second direction intersecting the first direction; and a plurality of display electrodes arranged corresponding to positions where the plurality of first bus lines and the plurality of second bus lines intersect. At least one of the plurality of first bus lines and at least one of the plurality of second bus lines overlap with all the sub-pixels of the colors included in the color display element when viewed from above.

Description

Technical Field

[0001] The following disclosure relates to a display device, and more specifically, to a display device including a plurality of display elements. Background Art

[0002] Liquid crystal displays (LCDs) utilize liquid crystal compositions for display. A typical display method involves irradiating a liquid crystal panel (LCD panel) with the LCD composition sealed between a pair of substrates with light from a backlight. Applying a voltage to the LCD composition changes the orientation of the liquid crystal molecules, thereby controlling the amount of light transmitted through the panel. These LCDs are characterized by their thinness, light weight, and low power consumption, and are therefore used in electronic devices such as televisions, smartphones, tablet computers, and car navigation systems.

[0003] In recent years, research has been underway into dual-cell displays that use overlapping front and rear panels. For example, Patent Document 1 discloses a display panel comprising a stacked liquid crystal display panel and a dimming panel. The dimming panel is described as having a plurality of signal lines, including a plurality of first signal lines extending in a first direction and a plurality of second signal lines extending in a second direction, with at least some of the plurality of signal lines being curved.

[0004] Patent document 2 discloses a liquid crystal display device comprising: a first liquid crystal display element and a second liquid crystal display element, each of which has a liquid crystal layer sandwiched by a pair of transparent substrates, and is stacked in such a manner that the pixel display areas of the two liquid crystal display elements are arranged corresponding to each other; a pair of polarizing plates that sandwich the stacked first liquid crystal display element and second liquid crystal display element from the outside; and at least one polarizing plate and a light-diffusing layer with light-diffusing properties, which are respectively arranged between the first liquid crystal display element and the second liquid crystal display element.

[0005] Although Patent Document 3 is not an invention relating to a dual-unit display, it discloses a liquid crystal display device in which two substrates having pixel electrodes for forming pixels are arranged relative to each other with a gap therebetween, a liquid crystal layer is sandwiched in the gap, and each pixel is formed by the relative pixel electrodes and the liquid crystal layer sandwiched in the gap. The liquid crystal display device is characterized in that the outer shape of each pixel is a triangle, a rhombus, a parallelogram, a polygon with a pentagon or larger shape, a circle, an ellipse, or an oblong.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: U.S. Patent Application Publication No. 2020 / 0292894

[0009] Patent Document 2: Japanese Patent Application Laid-Open No. 2007-310376

[0010] Patent Document 3: Japanese Patent Application Laid-Open No. 2002-221730 Summary of the Invention

[0011] Problems to be solved by the invention

[0012] Liquid crystal panels typically have light-shielding components such as bus bars and black matrices. However, dual-cell display devices overlap two liquid crystal panels and other display elements. Therefore, the overlap between the light-shielding components on the rear panel and the front panel varies depending on the viewing angle. Consequently, in dual-cell display devices, the transmittance varies depending on the viewing angle, making moiré fringes more likely to appear.

[0013] The following uses Figures 45 to 48 The generation of moiré fringes in a conventional two-cell display will be described. Figure 45 : is a schematic cross-sectional view showing an example of a conventional dual-cell display. Figure 45 As shown, a display device 2001, which is a conventional dual-cell display, includes a front panel 2100, a rear panel 2200, and a backlight 300 in this order. A first polarizing plate 2010 and a second polarizing plate 2020 are disposed on both sides of the front panel 2100, and a third polarizing plate 2030 and a fourth polarizing plate 2040 are disposed on both sides of the rear panel 2200. Furthermore, the second polarizing plate 2020 and the third polarizing plate 2030 are bonded together by a diffuse transparent optical adhesive sheet (diffusing OCA) 2050. Although described later, according to research conducted by the inventors of this application, in such a configuration, the haze value of the diffuse OCA 2050, which can eliminate moiré fringes, is 88%. Therefore, the haze value of the entire white display of the dual-cell display is 88% or greater. In this specification, the diffuse OCA, diffuser sheet, etc. are also referred to as a diffuser layer, and the aforementioned diffuser layer refers to a diffuser layer having a haze value (Haze) of 88% or greater.

[0014] Figure 46 FIG. 1 is a schematic top view showing an example of a front panel used in a conventional dual-unit display. Figure 46 As shown, the front panel 2100 is, for example, a color panel and has sub-pixels 2105 arranged in the row and column directions, with sub-pixels 2105 of the same color arranged along the column direction. The area surrounded by the gate line 2101 and the source line 2102 is a sub-pixel 2105, and a pixel electrode 2104 and a TFT 2103 are arranged for each sub-pixel 2105.

[0015] Figure 47 FIG. 1 is a schematic top view showing an example of a rear panel used in a conventional dual-unit display. Figure 47As shown, the rear panel 2200 includes gate lines G and source lines S, and includes display electrodes 2204 and TFTs 2203 for each region surrounded by the gate lines G and source lines S. A storage capacitor line CS may be arranged parallel to the gate lines G.

[0016] Figure 48 It will Figure 46 and Figure 47 Schematic diagram of a top view of a conventional dual-unit display with overlapping elements. Figure 48 As shown, in display device 2001, the source lines S of rear panel 2200 are parallel to the columns in which subpixels of the same color are arranged. Therefore, when the viewing angle from the row direction changes, the overlap between the subpixels of each color and the source lines S changes, resulting in a change in the visually perceived hue. Furthermore, when the viewing angle from the column direction changes, the overlap between the opening area of ​​the subpixel 2105 on front panel 2100 and the gate lines G and storage capacitor lines CS of rear panel 2200 changes, causing a change in brightness (luminance). Thus, when the entire display device is viewed from a fixed viewpoint, the brightness and hue periodically change, resulting in the appearance of moiré fringes.

[0017] In the past, in order to eliminate the moiré fringes, Figure 45 As shown, the front panel 2100 and the rear panel 2200 are bonded together using a diffused OCA. However, when a diffused OCA is used, the transmittance of the display device may be reduced by about 30%. In addition, the diffused OCA is expensive.

[0018] Patent Document 1 studies the suppression of moiré fringes by configuring at least a portion of the signal lines of the rear panel as curved lines. However, it is desirable that the curved lines are primarily provided for the first signal lines extending in the first direction, and that the second signal lines extending in the second direction are not bent (paragraph

[0081] ). Therefore, the moiré fringes countermeasure for the first direction is insufficient. In fact, the inventors of this application confirmed the same-color effective transmission area shown in the later-described embodiment 5 for a display device using the technology described in Reference Document 1. The result was that in the left-right direction (first direction), the transmittance varied for each sub-pixel of red R, green G, and blue B, and moiré fringes were confirmed.

[0019] In the invention described in Patent Document 2, the pixel display areas are arranged correspondingly between the first and second liquid crystal display elements, that is, the pixel pitches are uniform, which may reduce the transmittance. In addition, the countermeasures for moiré fringes on the signal lines are insufficient.

[0020] In Patent Document 3, moiré countermeasures can only be taken for either the signal line or the scanning line. In addition, since the signal line and the scanning line are hidden by a light-shielding screen, the aperture ratio may be reduced. In particular, when attempting to apply it to a dual-unit display, the low transmittance becomes a problem. In the case where two scanning lines or signal lines are arranged in parallel between pixel electrodes, the yield may be reduced due to a short circuit in the wiring, or a certain degree of spacing is required between the wiring to prevent the short circuit of the above-mentioned wiring, so the aperture ratio may be reduced. In addition, the horizontal and vertical lines become jagged, and color bleeding may occur when performing color display.

[0021] As mentioned above, conventional dual-cell displays can only implement moiré countermeasures in either the row or column direction; they cannot suppress moiré across the entire display surface. Therefore, a diffused OCA is placed between the front and rear panels to minimize the visual perception of moiré. However, the use of a diffused OCA reduces transmittance and increases manufacturing costs.

[0022] The following disclosure has been made in view of the above-mentioned current situation, and an object of the disclosure is to provide a two-cell display device that suppresses the occurrence of moiré fringes on the entire display screen and has high transmittance.

[0023] Solutions for solving problems

[0024] (1) One embodiment of the present disclosure is a display device comprising: a color display element having a plurality of pixels including sub-pixels of different colors arranged in row and column directions; and a liquid crystal display panel stacked on the color display element, the liquid crystal display panel having a TFT substrate, a relative substrate, and a liquid crystal layer sandwiched between the TFT substrate and the relative substrate, the TFT substrate having: a plurality of first buses extending in a first direction; a plurality of second buses extending in a second direction intersecting the first direction; and a plurality of display electrodes arranged corresponding to positions where the plurality of first buses and the plurality of second buses intersect, at least one of the plurality of first buses and at least one of the plurality of second buses overlapping with sub-pixels of all colors included in the color display element when viewed from above.

[0025] (2) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), at least one first bus among the above-mentioned multiple first buses is bent and extended toward the above-mentioned first direction, and at least one second bus among the above-mentioned multiple second buses is bent and extended toward the above-mentioned second direction.

[0026] (3) In addition, in an embodiment of the present disclosure, in addition to the configuration of (2), the first direction may be parallel to the row direction, and the second direction may be parallel to the column direction.

[0027] (4) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (2), at least one first bus among the above-mentioned multiple first buses includes multiple straight line parts, and the bending angle formed by the above-mentioned first direction and the above-mentioned straight line parts is within 45°±15°.

[0028] (5) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (2), at least one second bus among the above-mentioned multiple second buses includes multiple straight line portions, and the bending angle formed by the above-mentioned second direction and the above-mentioned straight line portions is within 45°±15°.

[0029] (6) In addition, a certain embodiment of the present disclosure may also be that, based on the configuration of (2) above, at least one first bus among the plurality of first buses and at least one second bus among the plurality of second buses respectively include a plurality of straight line portions, a bending angle formed by the first direction and the straight line portions included in the first bus is within 45°±15°, and a bending angle formed by the second direction and the straight line portions included in the second bus is within 45°±15°.

[0030] (7) In addition, a certain embodiment of the present disclosure may also be that, based on the configuration of (2) above, the total width of the bends of the above-mentioned multiple first buses in a direction perpendicular to the above-mentioned first direction is greater than 0.75 times and less than 1.25 times the length of the display area of ​​the above-mentioned liquid crystal display panel in a direction perpendicular to the above-mentioned first direction.

[0031] (8) In addition, a certain embodiment of the present disclosure may also be that, based on the configuration of (2) above, the total width of the bends of the plurality of second buses in a direction perpendicular to the second direction is greater than 0.75 times and less than 1.25 times the length of the display area of ​​the liquid crystal display panel in a direction perpendicular to the second direction.

[0032] (9) In addition, a certain embodiment of the present disclosure may also be that, based on the configuration of the above-mentioned (2), the total width of the bends of the above-mentioned multiple first buses in the direction perpendicular to the above-mentioned first direction is greater than 0.75 times and less than 1.25 times the length of the display area of ​​the above-mentioned liquid crystal display panel in the direction perpendicular to the above-mentioned first direction, and the total width of the bends of the above-mentioned multiple second buses in the direction perpendicular to the above-mentioned second direction is greater than 0.75 times and less than 1.25 times the length of the display area of ​​the above-mentioned liquid crystal display panel in the direction perpendicular to the above-mentioned second direction.

[0033] (10) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and the bending period of the above-mentioned first bus is less than 3 times the maximum length of one of the above-mentioned display units in the above-mentioned first direction.

[0034] (11) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and the bending period of the above-mentioned second bus is less than 3 times the maximum length of one of the above-mentioned display units in the above-mentioned second direction.

[0035] (12) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, the bending period of the above-mentioned first bus is less than 3 times the maximum length of one of the above-mentioned display units in the above-mentioned first direction, and the bending period of the above-mentioned second bus is less than 3 times the maximum length of one of the above-mentioned display units in the above-mentioned second direction.

[0036] (13) In addition, a certain embodiment of the present disclosure may be that, based on the configuration of (2), the distance between two adjacent first bus lines varies, and the portion where the distance between the two adjacent first bus lines is closest overlaps with the display electrode when viewed from above.

[0037] (14) In addition, a certain embodiment of the present disclosure may be that, based on the structure of (2) above, the distance between two adjacent second bus lines is variable, and the portion where the distance between the two adjacent second bus lines is closest overlaps with the above-mentioned display electrode when viewed from above.

[0038] (15) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and when for a first bus, a rectangular area with a curvature width in a direction perpendicular to the above-mentioned first direction as a short side and a length of the above-mentioned first bus in the above-mentioned first direction as a long side is set as the existence area of ​​the above-mentioned first bus, when viewed from above, the existence areas of two adjacent above-mentioned first buses do not overlap, and the interval between the existence areas of two adjacent above-mentioned first buses in a direction perpendicular to the above-mentioned first direction is less than 0.25 times the maximum length of one of the above-mentioned display units in the direction perpendicular to the above-mentioned first direction.

[0039] (16) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and when for a second bus, a rectangular area with a curvature width in a direction perpendicular to the above-mentioned second direction as a short side and a length of the above-mentioned second bus in the above-mentioned second direction as a long side is set as the existence area of ​​the above-mentioned second bus, when viewed from above, the existence areas of two adjacent above-mentioned second buses do not overlap, and the interval between the existence areas of two adjacent above-mentioned second buses in a direction perpendicular to the above-mentioned second direction is less than 0.25 times the maximum length of one of the above-mentioned display units in the direction perpendicular to the above-mentioned second direction.

[0040] (17) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and when for a first bus, a rectangular area with a curvature width in a direction perpendicular to the above-mentioned first direction as a short side and a length of the above-mentioned first bus in the above-mentioned first direction as a long side is set as the existence area of ​​the above-mentioned first bus, and for a second bus, a rectangular area with a curvature width in a direction perpendicular to the above-mentioned second direction as a short side and a length of the above-mentioned second bus in the above-mentioned second direction as a long side is set as the upper When the existence area of ​​the second bus is adjacent to the first bus, the existence areas of the two adjacent first buses do not overlap when viewed from above, and the existence areas of the two adjacent second buses do not overlap when viewed from above, the interval between the existence areas of the two adjacent first buses in the direction perpendicular to the first direction is less than 0.25 times the maximum length of one of the display units in the direction perpendicular to the first direction, and the interval between the existence areas of the two adjacent second buses in the direction perpendicular to the second direction is less than 0.25 times the maximum length of one of the display units in the direction perpendicular to the second direction.

[0041] (18) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and when for a first bus, a rectangular area with a curvature width in a direction perpendicular to the above-mentioned first direction as a short side and a length of the above-mentioned first bus in the above-mentioned first direction as a long side is set as the existence area of ​​the above-mentioned first bus, when viewed from above, the existence areas of two adjacent above-mentioned first buses overlap, and the overlapping width of the existence areas of the two adjacent above-mentioned first buses in the direction perpendicular to the above-mentioned first direction is less than 0.25 times the maximum length of the above-mentioned display unit in the direction perpendicular to the above-mentioned first direction.

[0042] (19) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and when for a second bus, a rectangular area with a curvature width in a direction perpendicular to the above-mentioned second direction as a short side and a length of the above-mentioned second bus in the above-mentioned second direction as a long side is set as the existence area of ​​the above-mentioned second bus, when viewed from above, the existence areas of two adjacent above-mentioned second buses overlap, and the overlapping width of the existence areas of two adjacent above-mentioned second buses in a direction perpendicular to the above-mentioned second direction is less than 0.25 times the maximum length of one of the above-mentioned display units in the direction perpendicular to the above-mentioned second direction.

[0043] (20) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above (2), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and when for a first bus, a rectangular area with a curvature width in a direction perpendicular to the above-mentioned first direction as a short side and a length of the above-mentioned first bus in the above-mentioned first direction as a long side is set as the existence area of ​​the above-mentioned first bus, and for a second bus, a rectangular area with a curvature width in a direction perpendicular to the above-mentioned second direction as a short side and a length of the above-mentioned second bus in the above-mentioned second direction as a long side is set as the existence area of ​​the above-mentioned first bus. When there is an area where a second bus exists, the areas where two adjacent first buses exist overlap when viewed from above, and the areas where two adjacent second buses exist overlap when viewed from above, and the overlapping width of the areas where the two adjacent first buses exist in a direction perpendicular to the first direction is less than 0.25 times the maximum length of one of the display units in the direction perpendicular to the first direction, and the overlapping width of the areas where the two adjacent second buses exist in a direction perpendicular to the second direction is less than 0.25 times the maximum length of one of the display units in the direction perpendicular to the second direction.

[0044] (21) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, the above-mentioned plurality of first buses respectively have a plurality of bending points, and in the adjacent above-mentioned first buses, the distance between the nearest above-mentioned bending points perpendicular to the above-mentioned first direction is less than 0.25 times the maximum length of one of the above-mentioned display units in the direction perpendicular to the above-mentioned first direction.

[0045] (22) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, the above-mentioned plurality of second buses respectively have a plurality of bending points, and in the adjacent above-mentioned second buses, the distance between the nearest above-mentioned bending points perpendicular to the above-mentioned second direction is less than 0.25 times the maximum length of one of the above-mentioned display units in the direction perpendicular to the above-mentioned second direction.

[0046] (23) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, the above-mentioned plurality of first buses respectively have a plurality of bending points, and in adjacent above-mentioned first buses, the distance between the nearest above-mentioned bending points perpendicular to the above-mentioned first direction is less than 0.25 times the maximum length of one of the above-mentioned display units in the direction perpendicular to the above-mentioned first direction, and the above-mentioned plurality of second buses respectively have a plurality of bending points, and in adjacent above-mentioned second buses, the distance between the nearest above-mentioned bending points perpendicular to the above-mentioned second direction is less than 0.25 times the maximum length of one of the above-mentioned display units in the direction perpendicular to the above-mentioned second direction.

[0047] (24) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above (1), in the above-mentioned sub-pixels of different colors possessed by the above-mentioned color display element, when viewed from above, the area obtained by subtracting the area overlapping with the above-mentioned multiple first buses and the above-mentioned multiple second buses possessed by the above-mentioned liquid crystal display panel from the area of ​​the opening area of ​​the sub-pixel is set as the sub-pixel effective transmission area, and the N pixels (N is an integer greater than or equal to 2) included in the area of ​​the above-mentioned color display element in the above-mentioned row direction and the N pixels in the above-mentioned column direction are 2 When the sum of the effective transmission areas of the sub-pixels of the same color is set as the effective transmission area of ​​the same color, in the above N 2 On each pixel, a plurality of measurement points are set in a grid pattern with a predetermined width in the row direction and the column direction. With the color display element fixed, the liquid crystal display panel is moved along the row direction and the column direction. When the same-color effective transmission area is obtained for each of the measurement points, the same-color effective transmission area of ​​each color satisfies the following equations (1) and (2):

[0048] (S Max -S Ave )÷S Ave ≤0.25 (1)

[0049] (S Ave -S Min )÷S Ave≤0.25 (2)

[0050] (The above S Max is the maximum value of the same-color effective transmission area obtained at each of the above measurement points,

[0051] The above S Min is the minimum value of the same-color effective transmission area obtained at each of the above measurement points,

[0052] The above S Ave is the average value of the above-mentioned same-color effective transmission area calculated at each of the above-mentioned measurement points).

[0053] (25) In addition, in an embodiment of the present disclosure, based on the configuration of (24), the same-color effective transmission area of ​​each color satisfies the following equations (3) and (4):

[0054] (S Max -S Ave )÷S Ave ≤0.1 (3)

[0055] (S Ave -S Min )÷S Ave ≤0.1 (4).

[0056] (26) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and the area of ​​one display unit is larger than the area of ​​one pixel included in the above-mentioned color display element.

[0057] (27) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the outer edge of the pixel electrode configured for each of the above-mentioned sub-pixels included in the above-mentioned color display element includes at least one straight line portion, and when viewed from above, the extension direction of the straight line portion of the above-mentioned pixel electrode intersects with the extension direction of all the sides of the outer edge of the above-mentioned display electrode included in the above-mentioned liquid crystal display panel.

[0058] (28) In addition, a certain embodiment of the present disclosure may also be that, based on the configuration of (27), the angle formed by the extension direction of the straight portion of the pixel electrode and the extension direction of at least one side constituting the outer edge of the display electrode is greater than 30° and less than 60°.

[0059] (29) In addition, in a certain embodiment of the present disclosure, based on the configuration of (1) above, the shape of the display electrode is a quadrilateral.

[0060] (30) In addition, in a certain embodiment of the present disclosure, based on the configuration of (1) above, the shape of the display electrode is a rectangle.

[0061] (31) In addition, a certain embodiment of the present disclosure may be that, based on the structure of (30), the shape of the display electrode is rectangular, and the length of the long side is greater than 1.5 times and less than 2.5 times the length of the short side.

[0062] (32) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), when viewed from above, at least one of the above-mentioned multiple first buses includes a first electrode overlapping portion that overlaps with at least one of the above-mentioned multiple display electrodes.

[0063] (33) In addition, a certain embodiment of the present disclosure may be that, based on the configuration of (32), the total length of the first electrode overlapping portions in a first bus is greater than 75% of the total length of the first bus.

[0064] (34) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), when viewed from above, at least one of the above-mentioned multiple second buses includes a second electrode overlapping portion that overlaps with at least one of the above-mentioned multiple display electrodes.

[0065] (35) In addition, a certain embodiment of the present disclosure may be that, based on the configuration of (34), the total length of the second electrode overlapping portions in a second bus is greater than 75% of the total length of the second bus.

[0066] (36) In addition, a certain embodiment of the present disclosure may also be that, based on the configuration of (1) above, at least one of the plurality of first buses includes a first electrode overlapping portion that overlaps with at least one of the plurality of display electrodes when viewed from above, and at least one of the plurality of second buses includes a second electrode overlapping portion that overlaps with at least one of the plurality of display electrodes when viewed from above.

[0067] (37) In addition, a certain embodiment of the present disclosure may also be that, based on the configuration of (36), the total of the overlapping portions of the above-mentioned first electrodes in a first bus is greater than 75% of the total length of the above-mentioned first bus, and the total of the overlapping portions of the above-mentioned second electrodes in a second bus is greater than 75% of the total length of the above-mentioned second bus.

[0068] (38) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the above-mentioned TFT substrate possessed by the above-mentioned liquid crystal display panel is arranged in the order of the supporting base material and the above-mentioned first bus, the first insulating layer, the above-mentioned second bus, the second insulating layer and the above-mentioned display electrode.

[0069] (39) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (38), there is a transparent conductive layer and a third insulating layer between the above-mentioned second insulating layer and the above-mentioned display electrode starting from the above-mentioned second insulating layer side.

[0070] (40) In addition, a certain embodiment of the present disclosure may also be that, based on the above-mentioned structure (39), when viewed from above, the above-mentioned first bus includes a first electrode overlapping portion that overlaps with at least one display electrode among the above-mentioned multiple display electrodes, and the above-mentioned transparent conductive layer is configured to overlap with the above-mentioned first electrode overlapping portion.

[0071] (41) In addition, a certain embodiment of the present disclosure may also be that, based on the above-mentioned structure (39), when viewed from above, the above-mentioned second bus includes a second electrode overlapping portion that overlaps with at least one of the above-mentioned multiple display electrodes, and the above-mentioned transparent conductive layer is configured to overlap with the above-mentioned second electrode overlapping portion.

[0072] (42) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (39), when viewed from above, at least one of the above-mentioned multiple first buses includes a first electrode overlapping portion overlapping with at least one of the above-mentioned multiple display electrodes, and at least one of the above-mentioned multiple second buses includes a second electrode overlapping portion overlapping with at least one of the above-mentioned multiple display electrodes, and the above-mentioned transparent conductive layer is configured to overlap with the above-mentioned first electrode overlapping portion and the above-mentioned second electrode overlapping portion.

[0073] (43) In addition, in a certain embodiment of the present disclosure, based on the configuration of (1) above, the liquid crystal display panel may not have a light shielding member between adjacent display electrodes when viewed from above.

[0074] (44) In addition, in a certain embodiment of the present disclosure, based on the configuration of (1) above, the haze value of the entire white display of the display device may be 79% or less.

[0075] (45) In addition, in a certain embodiment of the present disclosure, based on the configuration of (1) above, the haze value of the entire white display of the display device may be 50% or less.

[0076] (46) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), when the above-mentioned liquid crystal layer possessed by the above-mentioned liquid crystal display panel is set as a first liquid crystal layer, the above-mentioned color display element is a liquid crystal element having a second liquid crystal layer clamped by a pair of substrates, and is stacked in the order of a first polarizing plate, the above-mentioned color display element, the second polarizing plate, the above-mentioned liquid crystal display panel, and the third polarizing plate.

[0077] (47) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above (1), when the above-mentioned liquid crystal layer possessed by the above-mentioned liquid crystal display panel is set as the first liquid crystal layer, the above-mentioned second liquid crystal layer is clamped by the above-mentioned color filter substrate and the above-mentioned relative substrate of the above-mentioned liquid crystal display panel, and has a first polarizing plate, the above-mentioned color filter substrate, the above-mentioned second liquid crystal layer, a polarizing layer, the above-mentioned relative substrate, the first liquid crystal layer, the above-mentioned TFT substrate, and a second polarizing plate in sequence, and the above-mentioned relative substrate has a plurality of switching elements on the surface of the above-mentioned polarizing layer side for adjusting the voltage applied to the above-mentioned second liquid crystal layer.

[0078] (48) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the above-mentioned liquid crystal display panel is a front panel, and the above-mentioned color display element is a rear panel. When the above-mentioned liquid crystal layer possessed by the above-mentioned liquid crystal display panel is set as a first liquid crystal layer, the above-mentioned color display element is a liquid crystal element having a second liquid crystal layer clamped by a pair of substrates, and the substrate located on the back side of the display device in the above-mentioned pair of substrates has a reflective component on the side opposite to the above-mentioned second liquid crystal layer.

[0079] (49) In addition, a certain embodiment of the present disclosure may also be that, based on the above-mentioned structure of (47) or (48), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and the interval between the above-mentioned first liquid crystal layer and the above-mentioned second liquid crystal layer in the thickness direction of the above-mentioned display device is greater than 0.1 times the longer one of the maximum length of one of the above-mentioned display units in the above-mentioned first direction and the maximum length of one of the above-mentioned display units in the above-mentioned second direction.

[0080] (50) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the above-mentioned color display element is the front panel, the above-mentioned liquid crystal display panel is the rear panel, and the above-mentioned color display element, the above-mentioned liquid crystal display panel, and the backlight source are arranged in the order of the above-mentioned color display element, the above-mentioned liquid crystal display panel, and the backlight source.

[0081] (51) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (1), the above-mentioned liquid crystal display panel is the front panel, the above-mentioned color display element is the rear panel, and they are arranged in the order of the above-mentioned liquid crystal display panel, the above-mentioned color display element, and the backlight source.

[0082] (52) In addition, in a certain embodiment of the present disclosure, based on the configuration of (1) above, the relative substrate of the liquid crystal display panel may have a color filter.

[0083] (53) In addition, a certain embodiment of the present disclosure may be such that, based on the configuration of (50) or (51),

[0084] The backlight source includes light-emitting elements of multiple colors, and the light-emitting elements of multiple colors are driven in a field sequential manner of lighting up in a time-sharing manner, so that the liquid crystal display panel performs color display.

[0085] (54) In addition, a certain embodiment of the present disclosure may be that, based on the structure of (1) above, the above-mentioned liquid crystal display panel is a front panel, the above-mentioned color display element is a rear panel, and the above-mentioned color display element has a light-emitting layer.

[0086] (55) In addition, a certain embodiment of the present disclosure may also be that, based on the structure of the above-mentioned (54), the above-mentioned liquid crystal display panel has a plurality of display units respectively provided with the above-mentioned display electrodes, and the interval between the above-mentioned liquid crystal layer and the above-mentioned light-emitting layer in the thickness direction of the above-mentioned display device is greater than 0.1 times the longer one of the maximum length of one of the above-mentioned display units in the above-mentioned first direction and the maximum length of one of the above-mentioned display units in the above-mentioned second direction.

[0087] Effects of the Invention

[0088] According to the present disclosure, it is possible to provide a two-cell display device that suppresses the occurrence of moiré fringes on the entire display screen and has high transmittance. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figure 1 This is a schematic cross-sectional view of the display device according to Embodiment 1.

[0090] Figure 2 This is a schematic plan view of the color display element according to Embodiment 1.

[0091] Figure 3 This is a schematic cross-sectional view of the color display element of Embodiment 1.

[0092] Figure 4 This is a schematic plan view of a TFT substrate included in the liquid crystal display panel of Embodiment 1.

[0093] Figure 5 yes Figure 4 Schematic cross-sectional view of the portion indicated by the single-dot chain line.

[0094] Figure 6 It will Figure 2 Color display components and Figure 4 Schematic top view of the overlap of the first and second buses.

[0095] Figure 7A yes Figure 4 A schematic top view of a first bus is shown.

[0096] Figure 7B yes Figure 4 A schematic top view of a second bus is shown.

[0097] Figure 8 yes Figure 4 A schematic top view of a plurality of first and second buses is shown.

[0098] Figure 9 It will Figure 4 The diagram shows a top view of a diamond-shaped display electrode overlapping a color display element.

[0099] Figure 10 This is a schematic plan view showing a configuration in which a square display electrode and a color display element are superimposed on each other, as Modification 1.

[0100] Figure 11 This is a schematic plan view showing a second modification in which a rectangular display electrode and a color display element are superimposed.

[0101] Figure 12A It is a schematic plan view illustrating the position of a spacer arranged in one display unit.

[0102] Figure 12B It is a schematic plan view illustrating the arrangement of spacers in a liquid crystal display panel.

[0103] Figure 13A It is an explanation Figure 4 The diagram shows a top view of diamond-shaped display electrodes and display units.

[0104] Figure 13B The first and second buses are overlapped Figure 13A Schematic diagram of the top view of the case.

[0105] Figure 13C It will Figure 13B This shows another example of a change in the arrangement of display electrodes.

[0106] Figure 14A It is an explanation Figure 10 The diagram shows a top view of square display electrodes and display units.

[0107] Figure 14B The first and second buses are overlapped Figure 14A Schematic diagram of the top view of the case.

[0108] Figure 15A It is an explanation Figure 11 The rectangular display electrodes and display units are shown in a top view.

[0109] Figure 15B The first and second buses are overlapped Figure 15A Schematic diagram of the top view of the case.

[0110] Figure 15C It will Figure 15B This shows another example of a change in the arrangement of display electrodes.

[0111] Figure 16A This is a schematic plan view illustrating the arrangement position of the first bus bar in the first embodiment.

[0112] Figure 16B This is a schematic plan view illustrating the arrangement position of the second bus bar in the first embodiment.

[0113] Figure 17 It is a schematic plan view of a TFT substrate included in a liquid crystal display panel, and is a schematic plan view of Modification 5 in which redundant wiring is added.

[0114] Figure 18 It is a schematic plan view of a TFT substrate included in a liquid crystal display panel, and is a schematic plan view of Modification 6 in which auxiliary capacitor wiring is added.

[0115] Figure 19 It will Figure 17 Modification 5 and Figure 18 Schematic top view of variant example 7 combined with variant example 6.

[0116] Figure 20A 1 is a schematic plan view of first and second bus lines included in the liquid crystal display panel of Embodiment 2.

[0117] Figure 20B It will Figure 2 Color display components and Figure 20A Schematic top view of the overlap of the first and second buses.

[0118] Figure 21A yes Figure 20A A schematic top view of a first bus is shown.

[0119] Figure 21B yes Figure 20A A schematic top view of a second bus is shown.

[0120] Figure 22A It will Figure 13A The schematic plan view shows a case where the rhombus-shaped display electrodes shown overlap with the first and second bus lines of Embodiment 2.

[0121] Figure 22B It will Figure 22A This shows another example of a change in the arrangement of display electrodes.

[0122] Figure 23 It will Figure 14A The schematic plan view shows a case where a square display electrode overlaps with the first and second bus lines of Embodiment 2.

[0123] Figure 24 It will Figure 15A The schematic plan view shows a case where a rectangular display electrode overlaps with the first and second bus lines of Embodiment 2.

[0124] Figure 25A It is a schematic plan view illustrating the arrangement position of the first bus bar in the second embodiment.

[0125] Figure 25B It is a schematic plan view illustrating the arrangement position of the second bus bar in the second embodiment.

[0126] Figure 26A 1 is a schematic plan view of first and second bus lines included in a liquid crystal display panel according to a third embodiment.

[0127] Figure 26B It will Figure 2 Color display components and Figure 26A Schematic top view of the overlap of the first and second buses.

[0128] Figure 27A yes Figure 26A A schematic top view of a first bus is shown.

[0129] Figure 27B yes Figure 26A A schematic top view of a second bus is shown.

[0130] Figure 28A It will Figure 13A The schematic plan view shows a case where the rhombus-shaped display electrodes are overlapped with the first and second bus lines of Embodiment 3.

[0131] Figure 28B It will Figure 28A This shows another example of a change in the arrangement of display electrodes.

[0132] Figure 29 It will Figure 14A The schematic plan view shows a case where the square display electrodes and the first and second bus bars of Embodiment 3 overlap.

[0133] Figure 30 It will Figure 15A The schematic plan view shows a case where a rectangular display electrode overlaps with the first and second bus lines of Embodiment 3.

[0134] Figure 31A It is a schematic plan view illustrating the arrangement position of the first bus bar in the third embodiment.

[0135] Figure 31B It is a schematic plan view illustrating the arrangement position of the second bus bar in the third embodiment.

[0136] Figure 32A 1 is a schematic plan view of first and second bus lines included in a liquid crystal display panel according to a fourth embodiment.

[0137] Figure 32B It will Figure 2 Color display components and Figure 32A Schematic top view of the overlap of the first and second buses.

[0138] Figure 33A yes Figure 32A A schematic top view of a first bus is shown.

[0139] Figure 33B yes Figure 32A A schematic top view of a second bus is shown.

[0140] Figure 34A It will Figure 13A The diagram is a schematic plan view showing a case where a rhombus-shaped display electrode overlaps with the first and second bus bars of Embodiment 4.

[0141] Figure 34B It will Figure 34A This shows another example of a change in the arrangement of display electrodes.

[0142] Figure 35 It will Figure 14A The schematic plan view shows a case where a square display electrode overlaps with the first and second bus lines of Embodiment 4.

[0143] Figure 36 It will Figure 15A The schematic plan view shows a case where a rectangular display electrode overlaps with the first and second bus lines of Embodiment 4.

[0144] Figure 37 This is a schematic plan view for explaining the effective transmission area of ​​a sub-pixel in the fifth embodiment.

[0145] Figure 38 This is a schematic plan view of a color display element used to explain the method of calculating the same-color effective transmission area in Embodiment 5.

[0146] Figure 39 The LCD panel is overlapped with Figure 38 A schematic top view of a color display element is shown.

[0147] Figure 40 This is a schematic cross-sectional view of a display device according to Embodiment 6.

[0148] Figure 41 This is a schematic cross-sectional view of a display device according to Embodiment 7.

[0149] Figure 42 This is a schematic cross-sectional view of a display device according to Embodiment 8.

[0150] Figure 43 This is a schematic cross-sectional view of a color display element according to Embodiment 8.

[0151] Figure 44 This is a schematic cross-sectional view of a display device according to Embodiment 9.

[0152] Figure 45 This is a schematic cross-sectional view showing an example of a conventional two-cell display.

[0153] Figure 46 This is a schematic plan view showing an example of a front panel used in a conventional dual-cell display.

[0154] Figure 47 This is a schematic plan view showing an example of a rear panel used in a conventional dual-cell display.

[0155] Figure 48 It will Figure 46 and Figure 47 Schematic top view of superimposed conventional dual-cell displays.

[0156] Figure 49 This is a first schematic diagram illustrating a method for measuring substantially parallel light transmittance.

[0157] Figure 50 This is a second schematic diagram illustrating a method for measuring substantially parallel light transmittance.

[0158] Figure 51 This is a graph showing the relationship between the haze value of the diffusion layer and the total light transmittance.

[0159] Figure 52 This is a graph showing the relationship between the haze value of the diffusion layer and the perfectly parallel light transmittance.

[0160] Figure 53 This is a graph showing the relationship between the haze value of the diffusion layer and the substantially parallel light transmittance.

[0161] Figure 54 1 and 2 are explanatory diagrams showing color display in which the occurrence of moiré fringes is reproduced, and the luminance of sub-pixels of each color.

[0162] Description of Reference Numerals

[0163] 1, 1001, 1002, 1003, 1004, 2001: Display device

[0164] 10.2010: First polarizing plate

[0165] 20, 2020: Second polarizer

[0166] 30, 2030: Third polarizer

[0167] 40: OCA with high transparency

[0168] 100, 1100A, 1100B: Color display components

[0169] 101, 2101: Gate lines

[0170] 102, 2102: Source line

[0171] 103, 203, 2203: Switching element (TFT)

[0172] 104, 2104: pixel electrode

[0173] 105, 2105: sub-pixel

[0174] 106: Pixels

[0175] 110, 210, 1110A, 1110B, 1210: TFT substrates

[0176] 111, 131, 211: Support substrate

[0177] 114, 1114: Opposite electrodes

[0178] 115: Insulation layer

[0179] 120: Second liquid crystal layer

[0180] 130, 1130: Color filter substrate

[0181] 132: Color filter layer

[0182] 200, 1200: LCD panel

[0183] 201: First Bus

[0184] 202: Second bus

[0185] 202sub: Redundant wiring

[0186] 204: Display electrode

[0187] 205: Display units

[0188] 206: Connection Point

[0189] 207: Auxiliary capacitor wiring

[0190] 212: First insulation layer

[0191] 213: Second insulation layer

[0192] 214: Transparent conductive layer

[0193] 215: The third insulation layer

[0194] 220: Liquid crystal layer (first liquid crystal layer)

[0195] 230: relative substrate

[0196] 300: Backlight

[0197] 400: Light meter

[0198] 1000: Sample for transmittance evaluation

[0199] 1020: Polarization layer

[0200] 1040: Diffusion layer

[0201] 1120: Luminous layer

[0202] 1130: relative substrate

[0203] 2001: Dual-unit display

[0204] 2040: Fourth polarizer

[0205] 2050: Diffusion of OCA

[0206] 2100: Front Panel

[0207] 2200: Rear panel DETAILED DESCRIPTION

[0208] The following describes a display device according to an embodiment of the present disclosure. The present disclosure is not limited to the contents described in the following embodiment, and appropriate design changes can be made within the scope of the configuration of the present disclosure. In addition, components with the same configuration are marked with the same reference numerals, and repeated descriptions are omitted.

[0209] <Implementation Method 1>

[0210] (Display device)

[0211] Figure 1 Schematic cross-sectional view of the display device of Embodiment 1. Figure 1As shown in FIG. 1 , the display device 1 of Embodiment 1 includes a color display element 100 and a liquid crystal display panel 200 stacked on the color display element 100. Either the color display element 100 or the liquid crystal display panel 200 may be arranged on the viewer side, but in FIG. Figure 1 , the color display element 100 is a front panel and the liquid crystal display panel 200 is a rear panel. The display device 1 is configured such that the color display element 100, the liquid crystal display panel 200, and the backlight 300 are arranged in this order.

[0212] Display device 1 is a dual-unit display, equipped with a dual-unit signal processing system that generates video displayed on the front panel and video displayed on the rear panel based on input signals. Dual-unit signal processing is performed based on the input video signal, with image signals input from separate timing controllers (TCONs) to the color display element 100 and liquid crystal display panel 200, and a lighting signal input from the backlight driver circuit to the backlight 300. By using the color display element 100 as the front panel and the liquid crystal display panel 200 as the rear panel, the LCD panel 200 acts as a dimming panel to adjust the brightness of the video displayed on the color display element 100 from the rear, thereby enabling high-contrast display.

[0213] In the display device 1, the first polarizing plate 10, the color display element 100, the second polarizing plate 20, the liquid crystal display panel 200, and the third polarizing plate 30 are stacked in this order. The second polarizing plate 20 is shared by the color display element 100 and the liquid crystal display panel 200. In the display device 1, instead of Figure 45 The diffusion OCA2050 shown in the figure uses the highly transparent OCA40. By using the highly transparent OCA40, the adverse effects of changes in polarization state and polarization cancellation when passing through the OCA40 can be reduced, so that the Figure 45 The conventional dual-cell display shown here has a component corresponding to the third polarizing plate 2030 on the rear panel 2200 side removed. In Embodiment 1, the third polarizing plate 2030 is omitted. By eliminating one polarizing plate and eliminating the diffuse OCA, transmittance can be improved compared to conventional dual-cell displays. The highly transparent OCA 40 is, for example, an adhesive sheet with a haze value of 79% or less.

[0214] The second polarizing plate 20 and the highly transparent OCA 40 may be in contact. Figure 1 The relative substrate 230 in the middle may also be in contact.

[0215] The first polarizing plate 10, the second polarizing plate 20, and the third polarizing plate 30 are preferably linear polarizing plates. The linear polarizing plates are not particularly limited, and any conventionally known polarizing plate in the field of liquid crystal displays can be used. Preferably, the transmission axes of the first polarizing plate 10 and the second polarizing plate 20, and the transmission axes of the second polarizing plate 20 and the third polarizing plate 30 are all arranged in a crossed Nicol arrangement.

[0216] The display device 1 can suppress the generation of moiré fringes, eliminating the need for a diffuse OCA between the color display element 100 and the liquid crystal display panel 200, as is the case with conventional display devices. In a configuration without a diffuse OCA, the haze value of the entire display device 1 in a white display is preferably 79% or less, and more preferably 50% or less. This white display refers to the display at the highest grayscale level.

[0217] <Study of Haze Value>

[0218] The haze value and total light transmittance of the diffusion layer using different OCA sheets A to E were measured. The above-mentioned total light transmittance refers to the transmittance for light that is a sum of parallel light (light that goes straight without diffusion) and diffuse light, that is, light that spreads in all directions. The relationship between the haze value, total light transmittance, the transmittance of parallel light (completely parallel light transmittance), and the transmittance of diffuse light (diffused light transmittance) is expressed by the following formulas (A) to (C). In addition, the haze and total light transmittance are measured using, for example, a turbidity meter "HazeMeter NDH2000" manufactured by Nippon Denshoku Industries. The haze is measured by following the method of JIS K 7136. The total light transmittance is measured by following the method of JIS K 7361-1.

[0219] Haze value = diffuse light transmittance ÷ total light transmittance (A)

[0220] Total light transmittance = diffuse light transmittance + completely parallel light transmittance (B)

[0221] Completely parallel light transmittance = total light transmittance × (1 - haze value) (C)

[0222] When considering the transmittance of light passing through a display device, it is necessary to consider factors such as the certain degree of spread of light emitted from the backlight, the certain degree of spread of the angle of incidence of the light receiver in the measurement device, and the light distribution of the diffusion layer. Therefore, it is difficult to predict the transmittance of light passing through the display device based on the completely parallel light transmittance of the diffusion layer. Therefore, the inventors of this application measured the transmittance of the diffusion layer using a method similar to the method for measuring the transmittance of light passing through a display device described below. In this specification, the transmittance of the diffusion layer measured using the same method as the method for measuring the transmittance of light passing through a display device is also referred to as the "substantially parallel light transmittance."

[0223] (Method for measuring substantially parallel light transmittance)

[0224] The following uses Figure 49 and Figure 50 The method for measuring the substantially parallel light transmittance will be described. Figure 49 This is a first schematic diagram illustrating a method for measuring substantially parallel light transmittance. Figure 50 This is a second schematic diagram illustrating a method for measuring the transmittance of approximately parallel light. Figure 49 As shown, with the glass substrate 111 disposed on the backlight 300 , the light intensity meter 400 measures the amount of transmitted light from the side of the glass substrate 111 opposite to the backlight 300 , and the obtained value is set as T_Ref.

[0225] The backlight 300 is a conventionally known backlight in the field of liquid crystal display devices, such as that used in the embodiments of the present application. The supporting substrate 111 is similar to that used for the color filter substrate and TFT substrate of the color display element 100 and the liquid crystal display panel 200, and is, for example, a glass plate. The light intensity meter 400 is a measuring instrument used for evaluating liquid crystal panels, and an example thereof, such as the CA310 manufactured by Konica Minolta, can be used.

[0226] Next, if Figure 50 As shown, OCA sheets A to E were used as diffusion layers 1040, and two of the aforementioned glass plates (support substrates 111) were laminated together to produce samples for transmittance evaluation. Each transmittance evaluation sample was placed on a backlight 300, and the amount of transmitted light was measured using a light meter 400. The value obtained was designated as the transmitted light amount T_Sample for each sample. The transmittance of approximately parallel light is expressed by the following equation (D).

[0227] Parallel light transmittance = T_Sample / T_Ref (D)

[0228] Research on the Visual Perception of Moire Fringes

[0229] about Figures 45 to 48 The visual perception of moiré fringes in the conventional dual-cell display shown in Figure 1 was studied for Study Examples 1 to 6, which had different diffusion layers sandwiched between the front panel 2100 and the rear panel 2200. Study Example 1 was an example in which no diffusion layer was provided between the front panel 2100 and the rear panel 2200. Study Examples 2 to 6 were examples in which OCA sheets A to E were used as the diffusion layer, respectively.

[0230] For the conventional dual-cell displays of Study Examples 1 to 6, the displays were set to white and visually evaluated for moiré fringes from all directions, including the front, from a distance of approximately 1 meter. In the following table, no moiré fringes were observed, with a value of ◯; slight moiré fringes were observed, with a value of △; and clear moiré fringes were observed, with a value of ×.

[0231] The haze value, total light transmittance, completely parallel light transmittance, and substantially parallel light transmittance of the diffusion layer, as well as the visual recognition status of moiré fringes for Study Examples 1 to 6, are summarized in Table 1 below. In Study Example 1, since no OCA sheet was used as the diffusion layer, the value of T_Sample is the same as T_Ref.

[0232]

Table 1

[0233]

[0234] Regarding the visual perception of moiré fringes, the results of Study Examples 5 and 6 in Table 1 confirm that moiré fringes can be eliminated by setting the haze value of the diffusion layer to 88% or higher (87.70% or higher). This indicates that, when using only the diffusion layer to counteract moiré fringes, a diffusion layer with a haze value of 88% or higher is necessary. On the other hand, the results of Study Examples 1 to 3 confirm that, even with the use of a diffusion layer in conventional dual-cell displays, moiré fringes cannot be suppressed if the haze value of the diffusion layer is below 79%.

[0235] The following examines the relationships between the haze value and the total light transmittance, the haze value and the completely parallel light transmittance, and the haze value and the substantially parallel light transmittance. Figure 51 This is a graph showing the relationship between the haze value of the diffusion layer and the total light transmittance. Figure 52 This is a graph showing the relationship between the haze value of the diffusion layer and the perfectly parallel light transmittance. Figure 53 This is a graph showing the relationship between the haze value of the diffusion layer and the substantially parallel light transmittance.

[0236] like Figure 51 As shown in FIG, it was confirmed that the haze value of the diffusion layer has no correlation with the total light transmittance of the diffusion layer. Figure 52As shown in FIG, it is confirmed that the higher the haze value of the diffusion layer, the lower the completely parallel light transmittance of the diffusion layer. In addition, it should be particularly noted that, Figure 53 As shown, it was confirmed that the substantially parallel light transmittance of the diffusion layer decreases as the haze value of the diffusion layer increases. In particular, when the haze value exceeds 78.8% with Study Example 3 as the boundary, the substantially parallel light transmittance decreases sharply.

[0237] When the general Figure 53 Considering the results of this study together with the visual perception of moiré fringes shown in Table 1, it was confirmed that a sharp decrease in panel transmittance (substantially parallel light transmittance) can be avoided by setting the haze value of the diffusion layer to 79% or less. On the other hand, as mentioned above, in conventional dual-cell displays, if the haze value of the diffusion layer is 79% or less, the occurrence of moiré fringes cannot be suppressed. However, in the configuration of the display device 1 according to Embodiment 1, since moiré fringes are not visually perceived, it is possible to use, for example, a highly transparent OCA with a haze value of 79% or less, achieving both moiré suppression and improved transmittance.

[0238] The color display element 100 and the liquid crystal display panel 200 may be bonded or not, but bonding is preferred. This is because by bonding the color display element 100 and the liquid crystal display panel 200, there is no Figure 1 The interface reflection between the glass substrates (such as the TFT substrate 110 and the counter substrate 230) and the air layer can improve transmittance. Furthermore, by bonding the color display element 100 to the liquid crystal display panel 200, even if the color display element 100 or the liquid crystal display panel 200 is warped by heat or subjected to physical impact, it is possible to prevent misalignment between the pixels of the color display element 100 and the display units of the liquid crystal display panel 200.

[0239] When the color display element 100 and the liquid crystal display panel 200 are bonded together, either an OCA with high transparency or a diffusion OCA can be used. However, from the viewpoint of improving transmittance and suppressing costs, it is preferable to use an OCA with high transparency. In addition, when there is only one polarizing plate between the color display element 100 and the liquid crystal display panel 200, by irradiating ultraviolet rays from either the color display element 100 or the liquid crystal display panel 200, the ultraviolet rays can efficiently reach the OCA, so that a UV curing type OCA can be used, which can be cured in a short time. In the case where the color display element 100 and the liquid crystal display panel 200 are not bonded together, a diffusion sheet can be used. In addition, as described above, in the display device 1, the Figure 45The conventional dual-cell display shown has a third polarizing plate 2030 on the rear panel 2200 side. This is because, compared to removing the second polarizing plate 2020 on the front panel 2100 side, removing the third polarizing plate 2030 on the rear panel 2200 side does not affect the slight polarization cancellation and scattering caused by highly transparent OCA, etc., and thus can achieve high contrast.

[0240] The backlight source 300 is not particularly limited, and a backlight source that is previously known in the field of liquid crystal display devices can be used. For example, it can be a direct-type backlight source or an edge-type backlight source. The backlight source 300 can be made to emit light uniformly over the entire surface, or a local dimming drive can be performed in which the light-emitting surface of the backlight source is divided into a plurality of lighting areas and partially driven. By performing local dimming drive on the direct-type backlight source, the contrast can be further improved. Alternatively, the backlight source 300 may include light-emitting elements of multiple colors, and the light-emitting elements of the multiple colors are driven in a field sequence manner in which they are lit in a time-sharing manner, so that the liquid crystal display panel 200 performs a color display. Moreover, in order to display dynamic images more clearly, the entire or a part of the backlight source 300 can also be periodically turned on and off. Such a display method is also called black insertion, pulse drive, etc. Specifically, by turning off the backlight source 300 synchronously with the frame rate (for example, 120Hz), the dynamic image display performance can be improved.

[0241] The following compares the transmittance and contrast ratio (CR) of the display device of embodiment 1 and the conventional dual-cell display. Tables 2 and 3 below summarize the transmittance, white brightness, black brightness, and CR of the conventional dual-cell display and the display device of embodiment 1, respectively. Figure 45 The structure shown uses Figure 47 The structure shown is a liquid crystal display panel as a rear panel. As an example of a display device in Embodiment 1, there is Figure 1 The structure shown in the figure uses the Figure 4 and Figure 5 The structure shown in FIG is used as a liquid crystal display panel of the rear panel. As for the front panel, the conventional dual-cell display and the display device of embodiment 1 all use the following Figure 2 、 Figure 3 Such a conventionally known color display panel is shown in FIG.

[0242]

Table 2

[0243]

[0244]

Table 3

[0245]

[0246] As shown in Table 2, conventional dual-cell displays achieve an extremely low black brightness of 0.00041 nits and an extremely high CR of 1,168,307. Compared to the values ​​obtained with the front panel alone, the black brightness is 1 / 2439 and the CR is approximately 1,168 times higher. Furthermore, conventional dual-cell displays employ a diffused OCA between the rear and front panels to minimize the appearance of moiré patterns. Consequently, as shown in Table 2, the transmittance is as low as 2.4% and the white brightness as low as 479 nits, both dropping to approximately 47.9% of the values ​​obtained with the front panel.

[0247] On the other hand, the display device of Embodiment 1 is designed to be less prone to moiré fringes, eliminating the need for a diffuse OCA and allowing the use of a highly transparent OCA. Furthermore, since no diffuse OCA is used, no polarization state changes or polarization cancellation occurs between the rear and front panels, eliminating the need for a polarizing plate between them. By eliminating both the diffuse OCA and a polarizing plate, the resulting transmittance is 3.5% and the white brightness is 704 nits, both approximately 70.4% compared to the front panel alone, representing a 1.5-fold improvement over conventional dual-cell displays.

[0248] (Color display element)

[0249] The color display element 100 is not particularly limited as long as it can display color. Figure 1 In FIG. 1 , a case where the color display element 100 is a liquid crystal element is exemplified. Figure 2 This is a schematic plan view of the color display element according to Embodiment 1. Figure 3 This is a schematic cross-sectional view of the color display element of Embodiment 1.

[0250] like Figure 2 As shown, in a color display element 100, a plurality of pixels including sub-pixels of different colors are arranged in the row and column directions. Sub-pixels of the same color can also be arranged along the row or column directions. Hereinafter, such an arrangement is also referred to as a same-color stripe arrangement. For example, the sub-pixels of different colors are a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. The region including the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B is also referred to as a pixel 106.

[0251] like Figure 3 As shown, when the liquid crystal layer 220 of the liquid crystal display panel 200 described later is set as the first liquid crystal layer 220, the color display element 100 is a liquid crystal element having a second liquid crystal layer 120 sandwiched by a pair of substrates. The above-mentioned pair of substrates are, for example, a color filter substrate 130 and a TFT substrate 110. Figure 1, the case where the color filter substrate 130 is arranged on the observer side is illustrated, but the TFT substrate 110 may also be arranged on the observer side.

[0252] like Figure 2 As shown, the TFT substrate 110 has a plurality of gate lines 101 parallel to each other and a plurality of source lines 102 parallel to each other, and the plurality of gate lines 101 intersect the plurality of source lines 102. Preferably, the plurality of gate lines 101 and the plurality of source lines 102 are orthogonal. The area surrounded by two adjacent gate lines 101 and two adjacent source lines 102 is a sub-pixel 105. When viewed from above, a switching element 103 such as a thin film transistor (TFT) is arranged near the intersection of the gate line 101 and the source line 102. A pixel electrode 104 and a TFT 103 are arranged for each sub-pixel. When the voltage of the gate line becomes the on-voltage, the semiconductor layer of the TFT 103 connected to the gate line is energized, and the source signal is input from the source line to the pixel electrode 104.

[0253] Either the color filter substrate 130 or the TFT substrate 110 may include a counter electrode for forming an electric field between the pixel electrode 104 and the counter electrode. Figure 3 In the example, the TFT substrate 110 includes, in this order, a supporting base material 111 such as a glass substrate, an opposing electrode 114, an insulating layer 115, and a pixel electrode 104. Transmissive electrode materials such as indium tin oxide (ITO) and indium zinc oxide (IZO) can be used for the opposing electrode 114 and the pixel electrode 104.

[0254] The second liquid crystal layer 120 and the liquid crystal layer 220 (first liquid crystal layer) included in the liquid crystal display panel 200 described later both include liquid crystal molecules. These liquid crystal molecules may be liquid crystal molecules having a positive dielectric anisotropy (Δε) as defined by the following formula (positive type) or liquid crystal molecules having a negative dielectric anisotropy (Δε) as defined by the following formula (negative type).

[0255] Δε = (dielectric constant of the liquid crystal molecule in the long axis direction) - (dielectric constant of the liquid crystal molecule in the short axis direction) (L)

[0256] Although described later, in the liquid crystal display panel 200, it is preferable that the interval L1 between the first liquid crystal layer 220 and the second liquid crystal layer 120 in the thickness direction of the display device 1 is 0.1 times or more the longer of the maximum length of one display unit 205 in the first direction D1 and the maximum length of one display unit 205 in the second direction D2. Figure 1In the figure, L1 is the distance from the surface of the first liquid crystal layer 220 on the opposite substrate 230 side to the surface of the second liquid crystal layer 120 on the TFT substrate 110 side. If L1 is less than 0.1 times the longer of either the maximum length of a display unit 205 in the first direction D1 or the maximum length of a display unit 205 in the second direction D2, moiré fringes will not occur. On the other hand, when the color display element 100 and the liquid crystal display panel 200 are spaced apart, even if the image displayed on the color display element 100 and the image displayed on the liquid crystal display panel 200 overlap when viewed from the front, the image displayed on the color display element 100 and the image displayed on the liquid crystal display panel 200 may be offset when viewed from an angle, sometimes resulting in a double image (a double image problem). To avoid this double image problem, L1 is preferably no more than 50 times the longer of either the maximum length of a display unit 205 in the first direction D1 or the maximum length of a display unit 205 in the second direction D2. Specifically, the above-mentioned L1 is preferably 5 mm or less, and more preferably 1 mm or less.

[0257] The color filter substrate 130 is not particularly limited, and any substrate known in the art of liquid crystal display devices can be used. Figure 3 As shown, the optical fiber has a supporting substrate 131 such as a glass substrate and a color filter layer 132 formed on the supporting substrate. The color filter layer 132 may include a red color filter overlapping with the red sub-pixel R, a green color filter overlapping with the green sub-pixel G, a blue color filter overlapping with the blue sub-pixel B, and a black matrix BM separating the color filters of each color.

[0258] (Liquid Crystal Display Panel)

[0259] like Figure 1 As shown, the liquid crystal display panel 200 includes a TFT substrate 210, an opposite substrate 230, and a liquid crystal layer 220 sandwiched between the TFT substrate 210 and the opposite substrate 230. Figure 1 , the case where the counter substrate 230 is arranged on the observer side is illustrated, but the TFT substrate 210 may also be arranged on the observer side.

[0260] Figure 4 1 is a schematic top view of a TFT substrate included in the liquid crystal display panel of Embodiment 1. Figure 4As shown, the TFT substrate 210 has a plurality of first bus bars 201 extending in a first direction D1 and a plurality of second bus bars 202 extending in a second direction D2 intersecting the first direction D1. The first direction D1 is the direction in which the first bus bars 201 extend when the display device is viewed as a whole, and the second direction D2 is the direction in which the second bus bars 202 extend when the display device is viewed as a whole. Even if the first bus bars 201 and the second bus bars 202 each have a curved portion, the first direction D1 and the second direction D2 are not the directions in which the line segments forming the curved portion extend.

[0261] The TFT substrate 210 includes a plurality of display electrodes 204 arranged corresponding to the intersections of the plurality of first bus lines 201 and the plurality of second bus lines 202. Switching elements 203 may be arranged near the intersections of the plurality of first bus lines 201 and the plurality of second bus lines 202. The switching elements 203 are, for example, thin-film transistors (TFTs). One TFT 203 is arranged for each display electrode 204. For example, when the voltage of a display electrode 204 corresponding to the intersection of a first bus line 201 and a second bus line 202 reaches the on-voltage, the semiconductor layer of the TFT 203 is energized, and the source signal from the second bus line 202 is input to the display electrode 204. Thus, a first bus line 201 and a second bus line 202, whose input signal to a display electrode 204 is controlled by a single switching element 203, are also referred to as a first bus line 201 and a second bus line 202 associated with a display electrode 204 via the TFT 203.

[0262] The plurality of display electrodes 204 are preferably arranged in rows and columns. For the plurality of display electrodes 204 arranged in the same row, the TFTs 203 corresponding to the respective display electrodes 204 can be turned on by gate signals from the same first bus 201. For the plurality of display electrodes 204 arranged in the same column, source signals from the same second bus 202 can be input at the timing when the respective TFTs 203 are turned on. This arrangement achieves high compatibility with video signals used in typical liquid crystal panels.

[0263] Furthermore, it is preferred that the number of first bus lines 201 or second bus lines 202 arranged between adjacent display electrodes 204 be one. This is because, if two or more bus lines are arranged between adjacent display electrodes 204, the yield may decrease due to short circuits in the wiring, or a certain degree of spacing between the wiring lines is required to prevent short circuits in the wiring lines, which may reduce the aperture ratio or increase parasitic capacitance with the display electrodes 204.

[0264] The first direction D1 is preferably parallel to the row direction, and the second direction D2 is preferably parallel to the column direction. In this specification, "parallel" means that the angle formed by the two directions is 0° or greater and 10° or less, more preferably 5° or less, and even more preferably 0°. Furthermore, the angle formed by the first direction D1 and the second direction D2 is preferably 45° or greater and 90° or less, with a more preferred lower limit of 60° and an even more preferred lower limit of 80°. It is particularly preferred that the first direction D1 and the second direction D2 are orthogonal.

[0265] The liquid crystal display panel 200 preferably has no light-shielding member between adjacent display electrodes 204 in a plan view. The absence of a light-shielding member can further improve the transmittance of the display device 1. Examples of the light-shielding member include a black matrix.

[0266] The counter substrate 230 may or may not have a color filter. If the counter substrate 230 does not have a color filter, the liquid crystal display panel 200 may be a monochrome panel. Such a monochrome panel can adjust the amount of light transmitted through the panel to display a monochrome grayscale image. Even if the liquid crystal display panel 200 is a monochrome panel, color display can be achieved by driving the backlight 300 in the field sequential manner.

[0267] Figure 5 yes Figure 4 Schematic cross-sectional view of the portion shown by the single-dot chain line. Figure 5 As shown, the TFT substrate 210 can be arranged in the order of a supporting base 211, a first bus bar 201, a first insulating layer 212, a second bus bar 202, a second insulating layer 213, and a display electrode 204. By arranging the first bus bar 201, the second bus bar 202, and the display electrode 204 in different layers, the degree of freedom in the arrangement design of the first bus bar 201 and the second bus bar 202 is increased.

[0268] Furthermore, it is preferred that a transparent conductive layer 214 and a third insulating layer 215 are provided between the second insulating layer 213 and the display electrode 204 from the side of the second insulating layer 213. The transparent conductive layer 214 shields the area between the first bus 201 and the display electrode 204 and between the second bus 202 and the display electrode 204, thereby enabling the first bus 201 or the second bus 202 to be arranged at a position overlapping with the display electrode 204 when viewed from above. In addition, the bus voltage is prevented from affecting the liquid crystal layer via parasitic capacitance, thereby improving display quality and reliability. As the transparent conductive layer 214, a transmissive electrode material such as ITO or IZO can be used. The transparent conductive layer 214 only needs to be arranged in the area overlapping with the display electrode 204 and can be arranged on the entire surface of the TFT substrate 210.

[0269] By connecting the conductive layer 214 to a power source as a common electrode and providing slits or openings in the display electrode 204, an FFS (Fringe Field Switching) mode can be set, which generates a transverse electric field in the liquid crystal layer 220 to drive the liquid crystal molecules. When using the FFS mode, it is preferable to provide slits or openings in the display electrode 204 connected to the TFT 203.

[0270] The display mode of the liquid crystal display panel 200 can also be set to a longitudinal electric field mode such as a TN (Twisted Nematic) mode or a VA (Vertical Alignment) mode. In the case of a longitudinal electric field mode, a common electrode can be provided on the counter substrate 230. In the case of a longitudinal electric field mode, the display electrode 204 can be a solid electrode without slits or openings, or it can be provided with slits or openings. Furthermore, the transparent conductive layer 214 can be connected to a power supply, and the voltage of the power supply can be the same as the voltage of the common electrode.

[0271] Figure 6 It will Figure 2 Color display components and Figure 4 A schematic top view of the overlap of the first and second buses. Figure 6 middle, Figure 2 The TFT103 shown, Figure 4 The TFT 203 shown is omitted in the figure. At least one first bus line 201 among the plurality of first bus lines 201 and at least one second bus line 202 among the plurality of second bus lines 202 overlap with all the sub-pixels of the colors included in the color display element 100 when viewed from above. Figure 6 As shown, both the first bus lines 201 and the second bus lines 202 overlap with the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B in a plan view. By having both the first bus lines 201 and the second bus lines 202 overlap with the sub-pixels of all colors included in the color display element 100, the effects of the overlap between the sub-pixels of each color and the first bus lines 201 and the overlap between the sub-pixels of each color and the second bus lines 202 are averaged across the colors, thereby reducing the occurrence of moiré fringes.

[0272] The following describes how to configure the bus. Figure 7A yes Figure 4 The schematic top view of a first bus shown in FIG. Preferably, the first bus 201 extends while periodically bending in the first direction D1. In this specification, periodically bending means that the bending portion is repeatedly configured with a specific width and a specific length. Figure 7A In the bending period W 201-1 is the length of one bending cycle contained in the first bus 201. The width of the bend W201-2 It is the width of one bending period included in the first bus bar 201 in a direction perpendicular to the first direction.

[0273] like Figure 7A As shown, at least one of the plurality of first bus bars 201 includes multiple straight segments. A single first bus bar 201 can be formed by combining multiple straight segments 201a and 201b extending in different directions. The first direction D1 can be a direction connecting the midpoints of the plurality of straight segments 201a and 201b. Preferably, the first bus bar 201 has a wave-like shape comprising two or more straight segments extending in different directions.

[0274] It is preferred that the bending angle formed by the first direction D1 and the straight portion is within 45°±15°. In addition, in this specification, when the display device is viewed from the observer side, the angle obtained by rotating counterclockwise is set as +, and the angle obtained by rotating clockwise is set as -. Figure 1 In the case of the display device shown in FIG. 1 , the observer side is the first polarizing plate 10 side. By setting the bending angle within 45°±15°, the bending width W as in this embodiment can be adjusted. 201-2 is the bending period W 201-1 When the bending angle is 1 / 2 of the first direction D1, the wiring length can be shortened and the wiring resistance can be reduced. When the bending angle is 45°, the wiring length is the shortest and the wiring resistance can be minimized. In the case of a plurality of 201a and 201b with different extension directions, as long as at least one of the bending angles formed by the first direction D1 and the straight portion 201a and the bending angle formed by the first direction D1 and the straight portion 201b is within 45°±15°, it will be sufficient. Figure 7A , the case where the lengths of the straight portions 201a and 201b are equal, and the bending angle θ1-1 formed by the first direction D1 and the straight portion 201a and the bending angle θ1-2 formed by the first direction D1 and the straight portion 201b are both 45° is illustrated.

[0275] It is preferable that the width W of the bends of the plurality of first bus bars 201 in a direction perpendicular to the first direction D1 is 201-2 The total of the lengths W of the display area of ​​the liquid crystal display panel 200 in the direction perpendicular to the first direction D1 is 0.75 times or more and 1.25 times or less. 201-2 The total of the first bus lines 201 and the second bus lines 202 is set to be at least 0.75 times and no more than 1.25 times the length of the display area of ​​the liquid crystal display panel 200 in a direction perpendicular to the first direction D1. This uniformizes the overlapping area between the first bus lines 201 and the sub-pixels within the display area, thereby minimizing variations in the effective transmission area for the same color. The display area of ​​the liquid crystal display panel 200 refers to the area capable of displaying an image by light transmitted from the back surface and does not include the frame area.

[0276] The width W of the bend in a direction perpendicular to the first direction D1 is 201-2 The total of the lengths W of the display area of ​​the liquid crystal display panel 200 is preferably 0.9 times or more and 1.1 times or less, and is more preferably substantially equal to each other. 201-2 The total is roughly equal to the length of the display area of ​​the liquid crystal display panel 200 in the direction perpendicular to the first direction D1. In the sub-pixels within the display area, the overlapping area of ​​the first bus 201 and the sub-pixels becomes roughly the same, which can minimize the change in the effective transmission area of ​​the same color.

[0277] A curved width W 201-2 The maximum length of one display unit 205 in a direction perpendicular to the first direction D1 may be greater than or equal to 0.4 times and less than or equal to 1.2 times.

[0278] Figure 7B yes Figure 4 The second bus 202 is preferably extended while periodically bending in the second direction D2. Figure 7B In the bending period W 202-1 is the length of one bending cycle contained in the second bus 202. The width of the bend W 202-2 It is the width of one bending period included in the second bus bar 202 in a direction perpendicular to the second direction.

[0279] like Figure 7B As shown, at least one of the plurality of second bus bars 202 includes multiple straight segments. A single second bus bar 202 can be formed by combining multiple straight segments 202a and 202b extending in different directions. The second direction D2 can be a direction connecting the midpoints of the plurality of straight segments 202a and 202b. Preferably, the second bus bar 202 has a wave-like shape comprising two or more straight segments extending in different directions.

[0280] It is preferable that the bending angle formed by the second direction D2 and the straight portion is within 45°±15°. By setting the bending angle within 45°±15°, the width W of the bending portion as in this embodiment is 202-2 is the bending period W 202-1 When the bending angle is 1 / 2 of the second direction D2, the wiring length can be shortened and the wiring resistance can be reduced. When the bending angle is 45°, the wiring length is the shortest and the wiring resistance can be minimized. In the case of a plurality of 202a and 202b with different extension directions, as long as at least one of the bending angles formed by the second direction D2 and the straight portion 202a and the bending angle formed by the second direction D2 and the straight portion 202b is within 45°±15°, it will be sufficient. Figure 7B , the case where the lengths of the straight portions 202a and 202b are equal, and the bending angle θ2-1 formed between the second direction D2 and the straight portion 202a and the bending angle θ2-2 formed between the second direction D2 and the straight portion 202b are both 45° is illustrated.

[0281] It is preferable that the width W of the bends of the plurality of second bus bars 202 in the direction perpendicular to the second direction D2 is 202-2 The total of the widths W of the plurality of second bus bars 202 is greater than or equal to 0.75 times and less than or equal to 1.25 times the length of the display area of ​​the liquid crystal display panel 200 in the direction perpendicular to the second direction D2. 202-2 The sum of the width W of the bend in the direction perpendicular to the second direction D2 is set to be greater than or equal to 0.75 times and less than or equal to 1.25 times the length of the display area of ​​the liquid crystal display panel 200 in the direction perpendicular to the second direction D2. In the sub-pixels in the display area, the overlapping area of ​​the second bus line 202 and the sub-pixels is uniform, which can reduce the variation of the effective transmission area of ​​the same color. 202-2 The total is more preferably 0.9 times or more and 1.1 times or less of the length of the display area of ​​the liquid crystal display panel 200 , and is even more preferably substantially equal to each other.

[0282] A curved width W 202-2 The maximum length of one display unit 205 in a direction perpendicular to the second direction D2 may be greater than or equal to 0.4 times and less than or equal to 1.2 times.

[0283] Figure 8 yes Figure 4 Schematic top view of the plurality of first and second bus bars shown. More preferably, at least one first bus bar 201 among the plurality of first bus bars 201 extends while curving in the first direction D1, and at least one second bus bar 202 among the plurality of second bus bars 202 extends while curving in the second direction D2. Furthermore, more preferably, the curvature angle formed between the first direction D1 and the straight portions 201a and 201b included in the first bus bar 201 is within 45°±15°, and the curvature angle formed between the second direction D2 and the straight portions 202a and 202b included in the second bus bar 202 is within 45°±15°.

[0284] From the viewpoint of suppressing the generation of moiré fringes, it is preferred that the first bus 201 includes straight portions 201a and 201b forming an angle with the first direction D1, and the second bus 202 includes straight portions 202a and 202b forming an angle with the second direction D2. On the other hand, when the extension direction of the bus is different from the row direction and the column direction, the affinity with the video signal based on matrix drive is deteriorated. Therefore, it is preferred to make the average extension direction of the first bus 201 (first direction D1) and the average extension direction of the second bus 202 (second direction D2) consistent with the row direction or the column direction by setting a diamond lattice-like bus structure in which the bus is folded back at fixed intervals. As Figure 4 As shown, by arranging the TFTs 203 and the display electrodes 204 in a matrix, it is possible to improve the affinity with video signals used in general liquid crystal panels and to suppress the cost of the signal processing system.

[0285] More preferably, the width W of the bends of the plurality of first bus bars 201 in a direction perpendicular to the first direction D1 is 201-2 The total length of the display area of ​​the liquid crystal display panel 200 in the direction perpendicular to the first direction D1 is greater than or equal to 0.75 times and less than or equal to 1.25 times, and the width W of the bends of the plurality of second bus bars 202 in the direction perpendicular to the second direction D2 is greater than or equal to 0.75 times and less than or equal to 1.25 times. 202-2 The total of the length of the display area of ​​the liquid crystal display panel 200 in the direction perpendicular to the second direction D2 is not less than 0.75 times and not more than 1.25 times. The width W of the bend in the direction perpendicular to the first direction D1 is not less than 1.25 times. 201-2 The total length of the display area of ​​the liquid crystal display panel 200 and the width W of the bend in the direction perpendicular to the second direction D2 are calculated. 202-2 The total of is more preferably 0.9 times or more and 1.1 times or less of the length of the display area of ​​the liquid crystal display panel 200 , and particularly preferably is substantially equal to each other.

[0286] The following uses Figures 9 to 11 The following describes the arrangement of sub-pixels included in a color display element and display electrodes included in a liquid crystal display panel. The display electrode 204 can be in the shape of a quadrilateral. Examples of such a quadrilateral include a square, rectangle, rhombus, parallelogram, and trapezoid. The display electrode 204 can be formed from a transmissive electrode material such as ITO or IZO.

[0287] Figure 9 It will Figure 4 The schematic top view of the diamond-shaped display electrode and the color display element overlap. Figure 9 In FIG, the shape of the display electrode 204 is a rhombus, and the lengths of the two diagonals are equal. Figure 9In FIG, the case where the two diagonal lines are parallel to the first direction D1 and the second direction D2 respectively is illustrated. Figure 9 , the edge of the pixel electrode 104 of the color display element and the edge of the display electrode 204 form an angle of 45°. Figure 9 In FIG, the display unit 205 is also rhombus-shaped, with two diagonals of equal length. The two diagonals of the display unit 205 are parallel to the first direction D1 and the second direction D2, respectively. The example shows that the width and height of the display unit 205 are preferably integer multiples of the width and height of the pixel 106 of the color display element, specifically four times. Furthermore, the example shows that the area of ​​the display unit 205 is eight times the area of ​​the pixel 106.

[0288] Figure 10 This is a schematic top view of a square display electrode and a color display element overlapping each other as a modification example 1. Figure 10 In FIG, the display electrode 204 is shaped like a square, and one side and a side perpendicular to the one side are parallel to the first direction D1 and the second direction D2, respectively. Figure 10 , the edge of the pixel electrode 104 of the color display element is shown to be parallel to the edge of the display electrode 204. Figure 10 In FIG, the display unit 205 is also in the shape of a square, and the horizontal side and the vertical side of the display unit 205 are parallel to the first direction D1 and the second direction D2, respectively. The width and height of the display unit 205 are preferably integer multiples of the width and height of the pixel 106 of the color display element, specifically, 2 times. In addition, the area of ​​the display unit 205 is shown as 4 times the area of ​​the pixel 106. Figure 10 In the embodiment, although the edge of the pixel electrode 104 of the color display element is parallel to the edge of the display electrode 204, the area of ​​the display unit 205 is Figure 9 Compared to 1 / 2, the number of display units is doubled, so the resolution can be improved.

[0289] Figure 11 This is a schematic top view of a rectangular display electrode and a color display element overlapping as a second modification. Figure 11 In FIG, the shape of the display electrode 204 is a rectangle, and the extending direction of the long side and the extending direction of the short side form an angle of 45° with the first direction D1 or the second direction D2. Figure 11 In the example, the shape of the display unit 205 is also a rectangle. Figure 11In the example, the maximum width and maximum height of the display unit 205 parallel to the first direction D1 and the second direction D2 are preferably integer multiples of the width and height of the pixel 106 of the color display element, specifically 3 times. In addition, the case where the area of ​​the display unit 205 is 4 times the area of ​​the pixel 106 is shown. Figure 11 In the embodiment, the angle between the edge of the pixel electrode 104 of the color display element and the edge of the display electrode 204 is 45°, and the area of ​​the display unit 205 is 1 / 4 of the pixel electrode 104. Figure 10 The same is true with Figure 9 Compared with the case of 1 / 2, the number of display units is doubled, so the resolution can be improved. Figures 9 and 10 The total number of the first and second buses is equal, so the opening ratio is also the same Figure 9 and Figure 10 The advantage of the angle of 45° between the edge of the pixel electrode 104 and the edge of the display electrode 204 of the color display element will be described later.

[0290] like Figures 9 to 11 As shown, the liquid crystal display panel 200 preferably includes a plurality of display units 205 each provided with a display electrode 204, and the area of ​​one display unit 205 is larger than the area of ​​one pixel 106 included in the color display element 100. This can increase the aperture ratio of the display unit 205 and improve the transmittance of the display device 1.

[0291] like Figure 9 and Figure 11 As shown, preferably, in a plan view, the extending direction of the straight portion of the pixel electrode 104 intersects with the extending direction of at least one side constituting the outer edge of the display electrode 204 included in the liquid crystal display panel 200, and preferably intersects with the extending direction of all sides constituting the outer edge of the display electrode 204 included in the liquid crystal display panel 200. Figures 9 to 11 As shown, the outer edge of the pixel electrode 104 arranged for each sub-pixel 105 is rectangular, the extending direction of the short side is parallel to the first direction D1, and the extending direction of the long side is parallel to the second direction D2.

[0292] When the multiple sub-pixels 105 of the color display element 100 are arranged in a single-color stripe pattern, for example, when a rectangular window pattern is displayed on the liquid crystal display panel 200, if the outer edge of the window pattern displayed on the liquid crystal display panel 200 is parallel to the outer edge of the pixel electrode 104 of the color display element 100, depending on the viewing angle, sub-pixels 105 of a single color may sometimes appear to be aligned at the outer edge of the window pattern, and that color may be visually perceived. When the viewer moves the window pattern while the outer edge appears to be a single color, the color of the outer edge of the window pattern may change periodically, resulting in a visual appearance of linear color bleeding. In conventional dual-cell displays, the outer edge of the window pattern is blurred by the provision of a diffusion layer such as an optical fiber optical cell (OCA), thus eliminating this color bleeding and preventing it from becoming a major issue. However, in this embodiment, the presence of a diffusion layer such as an OCA is desirable to improve transmittance, thus causing this color bleeding issue.

[0293] In this regard, by making the extension direction of the straight portion of the pixel electrode 104 intersect with the extension direction of at least one side of the outer edge of the display electrode 204 included in the liquid crystal display panel 200 when viewed from above, the above-mentioned linear color bleeding can be suppressed. By making the extension direction intersect with the extension direction of all sides of the outer edge of the display electrode 204 included in the liquid crystal display panel 200, the above-mentioned linear color bleeding can be more effectively suppressed.

[0294] The angle formed between the extending direction of the straight portion of the pixel electrode 104 and the extending direction of at least one side constituting the outer edge of the display electrode 204 is preferably greater than or equal to 30° and less than or equal to 60°. More preferably, the angle formed between the extending direction of the straight portion of the pixel electrode 104 and the extending directions of all sides constituting the outer edge of the display electrode 204 is greater than or equal to 30° and less than or equal to 60°.

[0295] In the Figure 9 The diamond-shaped display electrodes and Figure 11 In the display electrode formed by the rectangular tilt arrangement shown in FIG. 1 , the extending direction of the straight portion of the pixel electrode 104 intersects with the extending direction of all the sides constituting the outer edge of the display electrode. Therefore, the above-mentioned linear bleeding can be suppressed. Figure 9 The angle formed by the extending directions of all the sides of the outer edge of the rhombus display electrode 204 is 45 degrees. Figure 11 The angle formed by the extending directions of all the sides of the outer edge of the display electrode 204 formed by the inclined rectangle shown is also 45°. More preferably, the angle formed by the extending direction of the straight portion of the pixel electrode 104 and the extending direction of all the sides constituting the outer edge of the display electrode 204 is 45°, which can effectively suppress linear color bleeding.

[0296] The following uses Figure 12A and Figure 12B The following describes the arrangement of spacers in the liquid crystal display panel 200. In order to maintain the thickness of the liquid crystal layer 220 in the liquid crystal display panel 200, spacers may be arranged using resin or the like. Figure 12A It is a schematic plan view illustrating the position of a spacer arranged in one display unit. Figure 12B It is a schematic plan view illustrating the arrangement of spacers in a liquid crystal display panel. Figure 12A It will Figure 12B A schematic diagram of a part of the enlarged top view. Figure 12A and Figure 12B In the figure, PS1 is the main column and PS2 is the auxiliary column.

[0297] like Figure 12A As shown, it is preferred that both the main pillars PS1 and the auxiliary pillars PS2 be positioned at the boundaries of adjacent display units 205 (around the display electrodes 204). By positioning the main pillars PS1 and the auxiliary pillars PS2 around the display electrodes 204, they can avoid the central portion of the display electrodes 204, where the alignment is uniform. By positioning them around the display electrodes 204 (at the boundaries of the display units 205), where the alignment of the liquid crystal molecules might otherwise be disturbed, transmittance can be maximized. Furthermore, it is preferred that both the main pillars PS1 and the auxiliary pillars PS2 be positioned at the boundaries of the sub-pixels 105 of the color display element 100.

[0298] exist Figure 12A and Figure 12B In the figure, letters A to F shown in the center of the display unit 205 represent the arrangement pattern of the main pillars PS1 and the auxiliary pillars PS2. By combining multiple arrangement patterns, the density of the main pillars PS1 and the auxiliary pillars PS2 in the entire liquid crystal display panel 200 can be adjusted to desired values.

[0299] The following uses Figures 13A to 15B The configuration of the first and second bus lines and the display electrodes will be described.

[0300] Figure 13A It is an explanation Figure 4 The diagram shows a top view of diamond-shaped display electrodes and display units. Figure 13B The first and second buses are overlapped Figure 13A Schematic diagram of the top view of the case. Figure 13C It will Figure 13B This shows another example of a change in the arrangement of display electrodes.

[0301] Figure 14A It is an explanation Figure 10 The diagram shows a top view of square display electrodes and display units. Figure 14BThe first and second buses are overlapped Figure 14A Schematic diagram of the top view of the case. Figure 13A Compared with the diamond-shaped display electrodes shown, the number of display units can be doubled.

[0302] Figure 15A It is an explanation Figure 11 The rectangular display electrodes and display units are shown in a top view. Figure 15B The first and second buses are overlapped Figure 15A Schematic diagram of the top view of the case. Figure 15C It will Figure 15B Another example of a change in the configuration of the display electrodes shown. Figure 13A Compared to the diamond-shaped display electrode shown, the number of display units can be doubled. Preferably, the display electrode 204 is rectangular, with the length of the long side being at least 1.5 times and no more than 2.5 times the length of the short side. More preferably, the length of the long side is twice the length of the short side. By setting the length of the long side to be twice the length of the short side, the plane of the liquid crystal display panel 200 can be filled with a rectangle of the same shape rotated at a 45-degree angle.

[0303] It is preferred that the distance between two adjacent first bus bars 201 varies, and the portion where the distance between two adjacent first bus bars 201 is shortest overlaps with the display electrode 204 in a plan view. Figure 13B The portion surrounded by the dotted line in the figure indicates the closest distance between two adjacent first bus bars 201. The distance between two adjacent first bus bars 201 may vary periodically. The two adjacent first bus bars 201 have the same bending width, bending period, and bending angle, and are arranged parallel to each other and shifted by half a period along the first direction D1.

[0304] It is preferred that the distance between two adjacent second bus bars 202 varies, and the portion where the distance between two adjacent second bus bars 202 is shortest overlaps with the display electrode 204 in a plan view. Figure 13C The portion surrounded by the dotted line in the figure is the portion where the distance between two adjacent second bus bars 202 is the shortest. The distance between two adjacent second bus bars 202 may vary periodically. The two adjacent second bus bars 202 have the same bending width, bending period, and bending angle, and are arranged so as to be parallel shifted by half a period along the second direction D2.

[0305] like Figure 13B 、 Figure 14B 、 Figure 15BAs shown, preferably, in a plan view, at least one of the plurality of first bus lines 201 includes a first electrode overlapping portion that overlaps with at least one of the plurality of display electrodes 204. More preferably, the total length of the first electrode overlapping portions in one first bus line 201 is 75% or more of the total length of the first bus line 201. Furthermore, preferably, one first bus line 201 associated with one display electrode 204 via a TFT 203 overlaps with the display electrode 204. By overlapping multiple display electrodes 204 arranged in the same row along the first direction D1 with the same first bus line 201, the effect of changes in the voltage of the first bus line 201 on the display electrodes 204 through parasitic capacitance is uniform, thereby preventing deterioration in display quality.

[0306] like Figure 13C 、 Figure 14B 、 Figure 15B As shown, preferably, when viewed from above, at least one of the plurality of second bus lines 202 includes a second electrode overlapping portion that overlaps with at least one of the plurality of display electrodes 204. More preferably, the total length of the second electrode overlapping portions in a single second bus line 202 is 75% or more of the total length of the single second bus line 202. Furthermore, preferably, a single display electrode 204 overlaps two adjacent second bus lines 202. More preferably, the overlapping areas of the two adjacent second bus lines in a single display electrode 204 are substantially equal. By overlapping a single display electrode 204 with two adjacent second bus lines 202, and by making the overlapping areas of the two adjacent bus lines in a single display electrode 204 substantially equal, the effect of parasitic capacitance on the display electrode 204 when the voltage of the second bus line 202 changes is reduced, or more preferably, eliminated, thereby preventing deterioration in display quality.

[0307] like Figure 14B 、 Figure 15B As shown, preferably, when viewed from above, at least one of the plurality of first bus bars 201 includes a first electrode overlapping portion that overlaps with at least one of the plurality of display electrodes 204, and when viewed from above, at least one of the plurality of second bus bars 202 includes a second electrode overlapping portion that overlaps with at least one of the plurality of display electrodes 204. More preferably, the total of the first electrode overlapping portions in one first bus bar 201 is 75% or more of the total length of one first bus bar 201, and the total of the second electrode overlapping portions in one second bus bar 202 is 75% or more of the total length of one second bus bar 202.

[0308] exist Figure 14BIn the display electrode 204, the first bus line 201 overlaps with the display electrode, and the second bus line 202 overlaps with the display electrode. Multiple display electrodes 204 arranged in the same row along the first direction D1 overlap with the same first bus line 201, and each display electrode 204 overlaps with two adjacent second bus lines 202. Within each display electrode 204, the two adjacent second bus lines 202 overlap by the same amount. This minimizes the impact of bus line parasitic capacitance on the display.

[0309] exist Figure 15B In the embodiment, among all the display electrodes 204, a plurality of display electrodes 204 arranged in the same row along the first direction D1 overlap with the same first bus 201. Therefore, the influence of the signal line (first bus) on the display through the parasitic capacitance can be reduced. Figure 14B Compared with the above, the effect of reducing the influence of the signal line on the display through the parasitic capacitance is weak. Therefore, it is more preferable to use Figure 5 The transparent conductive layer 214 shown in FIG. 2 shields the first bus line 201 from the display electrode 204 and the second bus line 202 from the display electrode 204 , thereby eliminating the influence of the signal line on the display through the parasitic capacitance.

[0310] Figure 5 The 201 shown corresponds to the first electrode overlapping portion where the first bus 201 overlaps with the display electrode 204, and the transparent conductive layer 214 is arranged to overlap with the first electrode overlapping portion. For example, if it is assumed that the transparent conductive layer 214 is arranged at least in the region overlapping with the display electrode 204, then in the example Figure 13C When the display electrodes 204 are arranged in this manner, the transparent conductive layer 214 is arranged so as to overlap with the second electrode overlapping portion.

[0311] Preferably, when viewed from above, at least one of the plurality of first buses 201 includes a first electrode overlapping portion that overlaps with at least one of the plurality of display electrodes 204, and at least one of the plurality of second buses 202 includes a second electrode overlapping portion that overlaps with at least one of the plurality of display electrodes 204, and the transparent conductive layer 214 is arranged to overlap with the first and second electrode overlapping portions. Assuming that the transparent conductive layer 214 is arranged at least in the region overlapping with the display electrode 204, then in the case of Figure 14B 、 Figure 15B 、 Figure 15C When the display electrodes 204 are arranged in this manner, the transparent conductive layer 214 overlaps with the first and second electrode overlapping portions.

[0312] The liquid crystal display panel 200 includes a plurality of display units 205, each of which is provided with a display electrode 204. The display unit 205 is a unit for adjusting the amount of light transmitted through one display electrode 204, and corresponds to a "sub-pixel" of the color display element 100. Typically, one display electrode 204 is provided in one display unit 205. Figure 13A 、 Figure 14A 、 Figure 15A As shown, when considering a single display electrode 204 as a reference, a line connecting a plurality of points that equally divide the interval between the single display electrode 204 and the other display electrodes 204 adjacent to the single display electrode 204 is a boundary line of the display unit 205, and an area inside the boundary line (on the side where the single display electrode 204 is arranged) is a display unit of the single display electrode 204. Furthermore, when a circle tangent to both the outer edge of the single display electrode 204 and the outer edge of the other display electrodes 204 adjacent to the single display electrode 204 is drawn, and when the point of tangency between the circle and the single display electrode 204 is defined as P1, and the point of tangency between the circle and the other display electrodes 204 adjacent to the single display electrode 204 is defined as P2, the distance between P1 and P2 is the interval between the single display electrode 204 and the other adjacent display electrodes 204.

[0313] In the drawings of this application, Pwx is the maximum length of a display electrode 204 in the first direction D1, and Pwy is the maximum length of a display electrode 204 in the second direction D2. Px is the maximum length of a display unit 205 in the first direction D1, and Py is the maximum length of a display unit 205 in the second direction D2.

[0314] like Figure 13B 、 Figure 13C 、 Figure 14B 、 Figure 15B As shown, the bending period W of the first bus 201 201-1 It can be less than 3 times or less than 2 times the maximum length Px of a display unit 205 in the first direction D1. 201-1 The maximum length Px of a display unit 205 in the first direction D1 is Figure 13B and Figure 13C 1 times, Figure 14B is 2 times, Figure 15B In addition, when the display electrode 204 is used as a reference, the bending period W of the first bus 201 is 201-1 It may be less than or equal to 3.6 times the maximum length Pwx of one display electrode 204 in the first direction D1 , or less than or equal to 2.4 times.

[0315] The bending period W of the second bus 202-1 It can be less than 3 times or less than 2 times the maximum length Py of one display unit 205 in the second direction D2. 202-1 The maximum length Py of a display unit 205 in the second direction D2 is Figure 13B and Figure 13C 1 times in Figure 14B In the middle is 2 times, Figure 15B In the example of 4 / 3 times. In addition, when the display electrode 204 is used as a reference, the bending period W of the second bus line is 202-1 It may be less than or equal to 3.6 times the maximum length Pwy of one display electrode 204 in the second direction D2, or less than or equal to 2.4 times.

[0316] More preferably, the bending period W of the first bus 201 is 201-1 is less than 3 times the maximum length Px of one display unit 205 in the first direction, and the bending period W of the second bus 202 is 202-1 The bending period W of the first bus 201 is preferably less than 3 times the maximum length Py of a display unit 205 in the second direction D2. 201-1 is less than 2 times the maximum length Px of one display unit 205 in the first direction D1, and the bending period W of the second bus is 202-1 It is less than or equal to twice the maximum length Py of one display unit 205 in the second direction D2.

[0317] In the case of taking the display electrode 204 as a reference, the bending period W of the first bus bar 201 is more preferably 201-1 is less than 3.6 times the maximum length Pwx of one display electrode 204 in the first direction, and the bending period W of the second bus bar 202 is 202-1 is less than 3.6 times of the maximum length Pwy of one display electrode 204 in the second direction D2. It is further preferred that the bending period W of the first bus 201 is 201-1 is less than 2.4 times the maximum length Pwx of one display electrode 204 in the first direction, and the bending period W of the second bus bar 202 is 202-1 It is less than or equal to 2.4 times the maximum length Pwy of one display electrode 204 in the second direction D2.

[0318] The following uses Figure 16A and Figure 16B To illustrate the configuration of adjacent first or second buses. Figure 16A This is a schematic plan view illustrating the arrangement position of the first bus bar in the first embodiment. Figure 16B This is a schematic plan view illustrating the arrangement position of the second bus bar in the first embodiment. Figure 16Aand Figure 16B FIG. 2 is a schematic plan view of a TFT substrate 210 included in the liquid crystal display panel 200 .

[0319] exist Figure 16A In FIG, the area where one first bus bar 201 exists, which is indicated by a thick line, is hatched. For one first bus bar 201, a rectangular area having a width of the bend in a direction perpendicular to the first direction D1 as a short side and a length of one first bus bar 201 in the first direction D1 as a long side is defined as the area where one first bus bar 201 exists. Figure 16A , for two adjacent first buses 201, respective existence areas are shown.

[0320] exist Figure 16A In the plan view, the existence areas of two adjacent first bus bars 201 do not overlap. It is preferable that the interval W between the existence areas of two adjacent first bus bars in the direction perpendicular to the first direction D1 is y1 The maximum length Py of one display unit 205 in the direction perpendicular to the first direction D1 is 0.25 times or less. y1 The W is 0.1 times or less relative to the above Py. y1 The maximum length Pwy of one display electrode 204 in a direction perpendicular to the first direction D1 may be 0.3 times or less.

[0321] exist Figure 16B In FIG, the area where one second bus bar 202 exists, which is indicated by a thick line, is hatched. For one second bus bar 202, a rectangular area having a curvature width in a direction perpendicular to the second direction D2 as a short side and a length of one second bus bar 202 in the second direction D2 as a long side is defined as the area where one second bus bar 202 exists. Figure 16B , for two adjacent second buses 202, respective existence areas are shown.

[0322] exist Figure 16B In the plan view, the above-mentioned existence areas of two adjacent second bus bars 202 do not overlap. It is preferred that the interval W between the above-mentioned existence areas of two adjacent second bus bars 202 in the direction orthogonal to the second direction D2 is x1 The maximum length Px of one display unit 205 in the direction perpendicular to the second direction is 0.25 times or less. x1 The above W is 0.1 times or less relative to the above Px. x1 The maximum length Pwx of one display electrode 204 in the direction perpendicular to the second direction may be 0.3 times or less.

[0323] You can also Figure 16A and Figure 16B The combination of the two adjacent first bus bars 201 does not overlap in the above-mentioned existence area when viewed from above, and the two adjacent second bus bars 202 does not overlap in the above-mentioned existence area when viewed from above, preferably the above-mentioned W y1 The W is 0.25 times or less relative to the above Py. x1 It is 0.25 times or less relative to the above Px. More preferably, the above W y1 is 0.1 times or less relative to the above Py, and the above W x1 It is 0.1 times or less relative to the above-mentioned Px.

[0324] In the case of using the display electrode 204 as a reference, it is preferable that the W y1 The above-mentioned W is 0.3 times or less relative to the above-mentioned Pwy. x1 It is 0.3 times or less relative to the above Pwx. More preferably, the above W y1 The above-mentioned Pwy is 0.12 times or less, and the above-mentioned W x1 It is 0.12 times or less relative to the above-mentioned Pwx.

[0325] The TFT substrate 210 included in the liquid crystal display panel 200 may further include redundant wiring and auxiliary capacitor wiring in addition to the first and second bus lines. Figure 17 It is a schematic plan view of a TFT substrate included in a liquid crystal display panel, and is a schematic plan view of Modification 5 in which redundant wiring is added. Figure 18 It is a schematic plan view of a TFT substrate included in a liquid crystal display panel, and is a schematic plan view of Modification 6 in which auxiliary capacitor wiring is added. Figure 19 It will Figure 17 Modification 5 and Figure 18 Schematic top view of variant example 7 combined with variant example 6.

[0326] like Figure 17 As shown, in Modification 5, redundant wiring 202sub is added to second bus bar 202. Redundant wiring 202sub is connected to second bus bar 202 at connection point 206. Providing redundant wiring 202sub makes second bus bar 202 multiplexed. Even if a portion of second bus bar 202 is disconnected due to a manufacturing defect, current can still flow through redundant wiring 202sub, thereby improving yield.

[0327] The configuration of the redundant wiring 202sub is not particularly limited, but Figure 17In the embodiment, redundant wiring 202sub has the same bend width, bend period, and bend angle as the second bus bar 202. Redundant wiring 202sub is moved parallel to the second direction D2 and connected to the intersection of the second bus bar 202 and redundant wiring 202sub. By making the shape of redundant wiring 202sub identical to the shape of the second bus bar 202, which does not generate moiré fringes, the occurrence of moiré fringes caused by redundant wiring 202sub can be suppressed while improving the yield rate.

[0328] like Figure 18 As shown, Modification 6 includes auxiliary capacitor lines 207. In Modification 6, the auxiliary capacitor lines 207 have the same bend width, bend period, and bend angle as the first bus lines 201, and are arranged parallel to each other in the first direction D1. The first bus lines 201 and the auxiliary capacitor lines 207 may also be arranged alternately in the second direction D2. Preferably, the distance between a first bus line 201 and two adjacent auxiliary capacitor lines 207 across the first bus line 201 is the same.

[0329] When the area containing one auxiliary capacitor line 207 is defined as a rectangular region whose short sides are the width of the bend in a direction perpendicular to the first direction D1 and whose long sides are the length of the auxiliary capacitor line 207 in the first direction D1, it is most preferable that the area containing the adjacent first bus line 201 and the area containing the auxiliary capacitor line 207 touch each other in a plan view. When the area containing the adjacent first bus line 201 and the area containing the auxiliary capacitor line 207 do not touch or overlap each other, the distance between the two areas is preferably 0.25 times or less, and more preferably 0.1 times or less, of the maximum length Py of one display unit 205 in a direction perpendicular to the first direction. When the two areas overlap, the overlapping width of the two areas is preferably 0.25 times or less, and more preferably 0.1 times or less, of the maximum length Py of one display unit 205 in a direction perpendicular to the first direction.

[0330] When the display electrode 204 is used as a reference, the distance between the two existing areas is preferably 0.3 times or less, and more preferably 0.12 times or less, the maximum length Pwy of one display electrode 204 in a direction perpendicular to the first direction. When the two existing areas overlap, the overlapping width of the two existing areas is preferably 0.3 times or less, and more preferably 0.12 times or less, the maximum length Pwy of one display electrode 204 in a direction perpendicular to the first direction.

[0331] By setting the shape of the auxiliary capacitor line 207 and the shape of the first bus line 201 as a whole Figure 16A 、 Figure 25A 、 Figure 31A The shape shown, which is less prone to moiré fringing, can suppress the occurrence of moiré fringes caused by auxiliary capacitor wiring 207 while also reducing the resistance of the common electrode (conductive layer 214 in Embodiment 1), thereby stabilizing display quality. Furthermore, auxiliary capacitor wiring 207 can also be used as an electrode required for an in-cell touch panel. By integrating touch panel functionality into the LCD panel, overall system costs can be reduced.

[0332] like Figure 19 As shown, the redundant wiring 202sub can be provided to multiply the second bus line 202 and improve the yield, and the auxiliary capacitor wiring 207 can be provided to reduce the resistance of the common electrode and stabilize the display quality.

[0333] <Implementation Method 2>

[0334] Embodiment 2 is an embodiment in which the shapes of the first and second bus bars are different from those of Embodiment 1, and is an example in which the first and second bus bars are periodically curved. Figure 20A 1 is a schematic plan view of first and second bus lines included in the liquid crystal display panel of Embodiment 2. Figure 21A yes Figure 20A A schematic top view of a first bus is shown. Figure 21B yes Figure 20A A schematic top view of a second bus is shown.

[0335] like Figure 21A As shown, a first bus 201 is formed by combining multiple 201a and 201b with different extension directions. Figure 21A , the case where the lengths of the straight portions 201a and 201b are equal, and the bending angle θ1-1 formed by the first direction D1 and the straight portion 201a and the bending angle θ1-2 formed by the first direction D1 and the straight portion 201b are both 38° is illustrated.

[0336] like Figure 21B As shown, a second bus 202 is formed by combining multiple 202a and 202b with different extension directions. Figure 21B , the example illustrates a case where the lengths of the straight portions 202a and 202b are equal, and the bending angle θ2-1 formed by the second direction D2 and the straight portion 202a and the bending angle θ2-2 formed by the second direction D2 and the straight portion 202b are both 38°.

[0337] Figure 22A It will Figure 13A The schematic plan view shows a case where the rhombus-shaped display electrodes shown overlap with the first and second bus lines of Embodiment 2. Figure 22B It will Figure 22A This shows another example of a change in the arrangement of display electrodes. Figure 23 It will Figure 14A The schematic plan view shows a case where the square display electrodes and the first and second bus bars of Embodiment 2 overlap. Figure 24 It will Figure 15A The schematic plan view shows a case where the rectangular display electrodes and the first and second bus bars of Embodiment 2 overlap. Figure 22A 、 Figure 22B The parts surrounded by dotted lines are the distances between two adjacent first buses 201 and the distances between two adjacent second buses 202. Figures 22A to 24 As shown, the first and second bus lines of Embodiment 2 can also be combined with the rhombus, square, and rectangular display electrodes described in Embodiment 1. Since the influence of the signal line on the display through the parasitic capacitance can be eliminated, it is preferable to arrange a first bus line 201 and the display electrode 204 and a second bus line 202 and the display electrode 204. Figure 5 The transparent conductive layer 214 shown in FIG.

[0338] The following uses Figure 25A and Figure 25B To illustrate the configuration of adjacent first or second buses. Figure 25A and Figure 25B FIG. 2 is a schematic plan view of a TFT substrate 210 included in the liquid crystal display panel 200 .

[0339] Figure 25A Schematic diagram of a top view illustrating the configuration position of the first bus in Embodiment 2. Figure 25A In FIG, the presence area of ​​one first bus bar 201 represented by a thick line is shown by hatching, and the presence areas of two adjacent first bus bars 201 are shown. Figure 25A In the plan view, the existence areas of two adjacent first bus bars 201 do not overlap. It is preferable that the interval W between the existence areas of two adjacent first bus bars in the direction perpendicular to the first direction D1 is y1 The maximum length Py of one display unit 205 in the direction perpendicular to the first direction D1 is 0.25 times or less. y1 It is 0.1 times or less relative to the above-mentioned Py.

[0340] In the case of display electrode 204 as a reference, the above W y1 The maximum length Pwy of one display electrode 204 in the direction perpendicular to the first direction D1 is preferably 0.3 times or less, and more preferably 0.12 times or less.

[0341] Figure 25B : is a schematic top view illustrating the configuration position of the second bus in embodiment 2. Figure 25BIn FIG, the presence area of ​​one second bus 202 represented by a thick line is shown by hatching, and the presence areas of two adjacent second bus 202 are shown. Figure 25B In the plan view, the above-mentioned existence areas of two adjacent second bus bars 202 do not overlap. It is preferred that the interval W between the above-mentioned existence areas of two adjacent second bus bars 202 in the direction orthogonal to the second direction D2 is x1 The maximum length Px of one display unit 205 in the direction perpendicular to the second direction is 0.25 times or less. x1 It is 0.1 times or less relative to the above-mentioned Px.

[0342] In the case of display electrode 204 as a reference, the above W x1 The maximum length Pwx of one display electrode 204 in the direction perpendicular to the second direction is preferably 0.3 times or less, and more preferably 0.12 times or less.

[0343] You can also Figure 25A and Figure 25B The combination of the two adjacent first bus bars 201 does not overlap in the above-mentioned existence area when viewed from above, and the two adjacent second bus bars 202 does not overlap in the above-mentioned existence area when viewed from above, preferably the above-mentioned W y1 The W is 0.25 times or less relative to the above Py. x1 It is 0.25 times or less relative to the above Px. More preferably, the above W y1 is 0.1 times or less relative to the above Py, and the above W x1 It is 0.1 times or less relative to the above-mentioned Px.

[0344] <Implementation Method 3>

[0345] Embodiment 3 is an embodiment in which the shapes of the first and second bus bars are different from those of Embodiment 1, and is an example in which the first and second bus bars are periodically curved. Figure 26A 1 is a schematic plan view of first and second bus lines included in a liquid crystal display panel according to a third embodiment. Figure 27A yes Figure 26A A schematic top view of a first bus is shown. Figure 27B yes Figure 26A A schematic top view of a second bus is shown.

[0346] like Figure 27A As shown, a first bus 201 is formed by combining multiple 201a and 201b with different extension directions. Figure 27A, the case where the lengths of the straight portions 201a and 201b are different, the bending angle θ1-1 formed by the first direction D1 and the straight portion 201a is 55°, and the bending angle θ1-2 formed by the first direction D1 and the straight portion 201b is 41° is illustrated.

[0347] like Figure 27B As shown, a second bus 202 is formed by combining multiple 202a and 202b with different extension directions. Figure 27B , the example illustrates a case where the lengths of the straight portions 202a and 202b are different, the bending angle θ2-1 formed by the second direction D2 and the straight portion 202a is 55°, and the bending angle θ2-2 formed by the second direction D2 and the straight portion 202b is 41°.

[0348] Figure 28A It will Figure 13A The diagram is a top view schematically showing a case where the rhombus-shaped display electrodes and the first and second bus bars of Embodiment 3 overlap. Figure 28B It will Figure 28A This shows another example of a change in the arrangement of display electrodes. Figure 29 It will Figure 14A The schematic plan view shows a case where the square display electrodes and the first and second bus bars of Embodiment 3 overlap. Figure 30 It will Figure 15A The schematic plan view shows a case where the rectangular display electrodes and the first and second bus bars of Embodiment 3 overlap. Figure 28A 、 Figure 28B The parts surrounded by dotted lines are the distances between two adjacent first buses 201 and the distances between two adjacent second buses 202. Figures 28A to 30 As shown, the first and second bus lines of Embodiment 3 can also be combined with the rhombus, square, and rectangular display electrodes described in Embodiment 1. Since the influence of the signal line on the display through the parasitic capacitance can be eliminated, it is preferable to arrange a first bus line 201 and the display electrode 204 and a second bus line 202 and the display electrode 204. Figure 5 The transparent conductive layer 214 shown in FIG.

[0349] The following uses Figure 31A and Figure 31B To illustrate the configuration of adjacent first or second buses. Figure 31A and Figure 31B FIG. 2 is a schematic plan view of a TFT substrate 210 included in the liquid crystal display panel 200 .

[0350] Figure 31A : is a top view schematic diagram illustrating the configuration position of the first bus in embodiment 3. Figure 31AIn FIG, the presence area of ​​one first bus bar 201 represented by a thick line is shown by hatching, and the presence areas of two adjacent first bus bars 201 are shown. Figure 31A In the plan view, the existence areas of two adjacent first bus bars 201 overlap. Preferably, the overlapping width W of the existence areas of two adjacent first bus bars 201 in the direction perpendicular to the first direction D1 is y2 The maximum length Py of one display unit 205 in the direction perpendicular to the first direction D1 is 0.25 times or less. y2 It is 0.1 times or less relative to the above-mentioned Py.

[0351] In the case of display electrode 204 as a reference, the above W y2 The maximum length Pwy of one display electrode 204 in the direction perpendicular to the first direction D1 is preferably 0.3 times or less, and more preferably 0.12 times or less.

[0352] Figure 31B : is a top view schematic diagram illustrating the configuration position of the second bus in embodiment 3. Figure 31B In FIG, the presence area of ​​one second bus 202 represented by a thick line is shown by hatching, and the presence areas of two adjacent second bus 202 are shown. Figure 31B In the plan view, the existence areas of two adjacent second bus bars 202 overlap. Preferably, the overlapping width W of the existence areas of two adjacent second bus bars 202 in the direction perpendicular to the second direction D2 is x2 The maximum length Px of one display unit 205 in the direction perpendicular to the second direction D2 is 0.25 times or less. x2 It is 0.1 times or less relative to Px.

[0353] When the display electrode 204 is used as a reference, W x2 The maximum length Pwx of one display electrode 204 in the direction perpendicular to the second direction D2 is preferably 0.3 times or less, and more preferably 0.12 times or less.

[0354] You can also Figure 31A and Figure 31B The combination of the two adjacent first bus bars 201 and the two adjacent second bus bars 202 overlap in the plan view, and the W y2 The above-mentioned W is 0.25 times or less relative to the above-mentioned Pwy. x2 It is 0.25 times or less relative to the above Pwx. More preferably, the above W y2 The above-mentioned W is 0.1 times or less relative to the above-mentioned Pwy. x2It is 0.1 times or less relative to the above-mentioned Pwx.

[0355] <Implementation Method 4>

[0356] Embodiment 4 is an embodiment in which the shapes of the first and second bus bars are different from those of Embodiment 1, and is an example in which the bending width, bending period, and bending angle of the first and second bus bars are not fixed. Figure 32A 1 is a schematic plan view of first and second bus lines included in a liquid crystal display panel according to a fourth embodiment. Figure 32B It will Figure 2 Color display components and Figure 32A Schematic top view of the overlap of the first and second buses. Figure 33A yes Figure 32A A schematic top view of a first bus is shown. Figure 33B yes Figure 32A A schematic top view of a second bus is shown.

[0357] like Figure 32A As shown in the fourth embodiment, the width, bending period, and bending angle of the first and second buses are not fixed. Even if the first and second buses are not periodically bent, as shown in FIG. Figure 32B As shown, by overlapping the first bus 201 and the second bus 202 with the sub-pixels of all colors included in the color display element, the effects caused by the overlap of the sub-pixels of each color with the first bus 201 and the overlap of the sub-pixels of each color with the second bus 202 are also averaged between the colors, so that moire fringes are less likely to occur.

[0358] In embodiment 4, Figure 33A As shown, the first bus 201 extends in the first direction D1 and is composed of a plurality of straight line portions of different lengths. Each of the plurality of first buses has a plurality of bending points. Figure 33B As shown, the second bus 202 extends in the second direction D2 and is composed of a plurality of straight sections of different lengths. The plurality of second buses each have a plurality of bending points. Figure 33A and Figure 33B In FIG, a bending point is shown by a black circle. The bending point is the intersection of line segments extending in different directions.

[0359] like Figure 32AAs shown, in adjacent first bus bars 201, the distance between the closest bending points P201-1a and P201-2a perpendicular to the first direction D1 is set as W201-3a, and the distance between the bending points P201-1b and P201-2b perpendicular to the first direction D1 is set as W201-3b. It is preferable that the above W201-3a and W201-3b are not more than 0.25 times the maximum length Py of one display unit 205 in the direction perpendicular to the first direction D1 (refer to the reference numerals 205 and Py). Figure 34A 、 Figure 34B 、 Figure 35 、 Figure 36 ). More preferably, the W201-3a and W201-3b are 0.1 times or less relative to the Py.

[0360] With the display electrode 204 as a reference, the lengths of W201 - 3 a and W201 - 3 b are preferably 0.3 times or less, and more preferably 0.12 times or less, the maximum length Pwy of one display electrode 204 in a direction perpendicular to the first direction D1 .

[0361] In adjacent second bus bars 202, the distance between the closest bending points P202-1a and P202-2a perpendicular to the second direction D2 is defined as W202-3a, and the distance between the bending points P202-1b and P202-2b perpendicular to the second direction D2 is defined as W202-3b. Preferably, W202-3a and W202-3b are equal to or less than 0.25 times the maximum length Px of one display unit 205 in the direction perpendicular to the second direction D2 (refer to the reference numerals 205 and Px). Figure 34A 、 Figure 34B 、 Figure 35 、 Figure 36 ). More preferably, the W202-3a and W202-3b are 0.1 times or less relative to the Px.

[0362] With the display electrode 204 as a reference, the lengths of W202 - 3 a and W202 - 3 b are preferably 0.3 times or less, and more preferably 0.12 times or less, the maximum length Pwx of one display electrode 204 in a direction perpendicular to the second direction D2 .

[0363] Preferably, in adjacent first bus bars 201, the distance between the closest inflection points perpendicular to the first direction D1 (W201-3a and W201-3b) is no greater than 0.25 times the maximum length Py of a display unit 205 perpendicular to the first direction D1, and in adjacent second bus bars 202, the distance between the closest inflection points perpendicular to the second direction D2 (W202-3a and W202-3b) is no greater than 0.25 times the maximum length Px of a display unit 205 perpendicular to the second direction D2. More preferably, W201-3a and W201-3b are no greater than 0.1 times Py, and W202-3a and W202-3b are no greater than 0.1 times Px.

[0364] When the display electrode 204 is used as a reference, it is preferable that W201 - 3 a and W201 - 3 b are 0.3 times or less relative to Pwy, and W202 - 3 a and W202 - 3 b are 0.12 times or less relative to Pwx.

[0365] Figure 34A It will Figure 13A The diagram is a top view schematically showing a case where diamond-shaped display electrodes and the first and second bus bars of Embodiment 4 overlap. Figure 34B It will Figure 34A This shows another example of a change in the arrangement of display electrodes. Figure 35 It will Figure 14A The schematic plan view shows a case where a square display electrode and the first and second bus bars of Embodiment 4 overlap. Figure 36 It will Figure 15A The schematic plan view shows a case where rectangular display electrodes and the first and second bus bars of Embodiment 4 overlap. Figure 34A 、 Figure 34B The parts surrounded by dotted lines are the distances between two adjacent first buses 201 and the distances between two adjacent second buses 202. Figures 34A to 36 As shown, the first and second bus lines of Embodiment 4 can also be combined with the rhombus, square, and rectangular display electrodes described in Embodiment 1. Since the influence of the signal line on the display through the parasitic capacitance can be eliminated, it is preferable to arrange a first bus line 201 and the display electrode 204 and a second bus line 202 and the display electrode 204. Figure 5 The transparent conductive layer 214 shown in FIG.

[0366] <Implementation Method 5>

[0367] A display device according to embodiment 5 includes: a color display element having a plurality of pixels including sub-pixels of different colors arranged in row and column directions; and a liquid crystal display panel stacked on the color display element, the liquid crystal display panel having a TFT substrate, a counter substrate, and a liquid crystal layer sandwiched between the TFT substrate and the counter substrate, the TFT substrate having: a plurality of first bus lines extending in a first direction; a plurality of second bus lines extending in a second direction intersecting the first direction; and a plurality of display electrodes arranged corresponding to positions where the plurality of first bus lines and the plurality of second bus lines intersect, at least one of the plurality of first bus lines and at least one of the plurality of second bus lines respectively overlapping with sub-pixels of all colors included in the color display element when viewed from above, and for this display device, for each sub-pixel of different colors, the same-color effective transmission area, described later, satisfies a prescribed relationship.

[0368] Descriptions of the components that are the same as those in Embodiment 1 will be omitted. The display device of Embodiment 5 can be combined with Embodiments 1 to 4 as appropriate.

[0369] The display device is as follows: in the above-mentioned sub-pixels of different colors possessed by the above-mentioned color display element, when viewed from above, the area obtained by subtracting the area overlapping with the above-mentioned plurality of first buses and the above-mentioned plurality of second buses possessed by the above-mentioned liquid crystal display panel from the area of ​​the opening area of ​​the sub-pixel is set as the sub-pixel effective transmission area, and for the above-mentioned color display element, the area including N pixels (N is an integer greater than or equal to 2) in the above-mentioned row direction and N pixels in the above-mentioned column direction is N pixels. 2 When the sum of the effective transmission areas of the sub-pixels of the same color is set as the effective transmission area of ​​the same color, in the above N 2 On each pixel, a plurality of measurement points are set in a grid pattern with a predetermined width in the row direction and the column direction. With the color display element fixed, the liquid crystal display panel is moved along the row direction and the column direction. When the same-color effective transmission area is obtained for each of the measurement points, the same-color effective transmission area of ​​each color satisfies the following equations (1) and (2):

[0370] (S Max -S Ave )÷S Ave ≤0.25 (1)

[0371] (S Ave -S Min )÷S Ave ≤0.25 (2)

[0372] (The above S Maxis the maximum value of the same-color effective transmission area obtained at each of the above measurement points,

[0373] The above S Min is the minimum value of the same-color effective transmission area obtained at each of the above measurement points,

[0374] The above S Ave is the average value of the above-mentioned same-color effective transmission area calculated at each of the above-mentioned measurement points).

[0375] By setting the overlap between the first and second bus lines of the liquid crystal display panel and the sub-pixels of different colors included in the color display element within a fixed range, the occurrence of moire fringes can be suppressed.

[0376] It is preferred that the same color effective transmission area of ​​each color satisfies the following formula (3) and the following formula (4):

[0377] (S Max -S Ave )÷S Ave ≤0.1 (3)

[0378] (S Ave -S Min )÷S Ave ≤0.1 (4).

[0379] The following uses Figures 37 to 39 The following describes how to calculate the effective transmission area of ​​the same color. Figure 37 This is a schematic plan view for explaining the effective transmission area of ​​a sub-pixel in the fifth embodiment. Figure 38 This is a schematic plan view of a color display element used to explain the method of calculating the same-color effective transmission area in Embodiment 5. Figure 39 The LCD panel is overlapped with Figure 38 A schematic top view of a color display element is shown. Figure 37 yes Figure 39 Schematic diagram of an enlarged top view of the area surrounded by the dotted line. Figure 38 With Figure 2 The structure is the same as that of the conventional embodiment, but the gate line 101 , the source line 102 , the TFT 103 , and the pixel electrode 104 are not shown.

[0380] like Figure 37 As shown in FIG, the case where the sub-pixels of different colors are red sub-pixel 105 (R), green sub-pixel 105 (G), and blue sub-pixel 105 (B). For each of the red sub-pixel 105 (R), green sub-pixel 105 (G), and blue sub-pixel 105 (B), for example, Figure 2 The area surrounded by the gate line 101 and the source line 102 is the opening area of ​​the sub-pixel. Figure 37 In the example shown for green sub-pixel 105(G), second bus line 202 overlaps with green sub-pixel 105(G). The area enclosed by the dotted line is the area obtained by subtracting the area overlapping with second bus line 202 from the area of ​​the aperture of green sub-pixel 105(G), and corresponds to the "sub-pixel effective transmission area" of the green sub-pixel.

[0381] The following uses Figure 38 、 Figure 39 To illustrate the specific calculation method. Figure 38 As shown, a pixel 106 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. Figure 38 Indicates 64 pixels contained in an area of ​​8 pixels in the row direction and 8 pixels in the column direction. Figure 38 , the row direction is set to 0°-180°, and the column direction is set to 90°-270°. For the above 64 pixels, the sum of the sub-pixel effective transmission areas of the red sub-pixels R is set to the red same-color effective transmission area, the sum of the sub-pixel effective transmission areas of the green sub-pixels G is set to the green same-color effective transmission area, and the sum of the sub-pixel effective transmission areas of the blue sub-pixels B is set to the blue same-color effective transmission area.

[0382] The following describes a method for setting a plurality of measurement points in a grid pattern with a predetermined width in the row and column directions on the 64 pixels. Figure 38 As shown, the length of one pixel 106 in the row direction is Psx, and the length of one pixel 106 in the column direction is Psy. The length obtained by dividing Psx by 3, which is the number of sub-pixels, is Pssx. On the color display element 100, 97 straight lines parallel to the column direction are set, each divided by a distance of 8 times Psx in the 0°-180° direction and a width of 0.25 times Pssx. Furthermore, 33 straight lines parallel to the row direction are set, each divided by a distance of 8 times Psy in the 90°-270° direction and a width of 0.25 times Psy. The intersections of these 97 straight lines parallel to the column direction and the 33 straight lines parallel to the row direction are used as measurement points, with 3201 measurement points set in a grid pattern.

[0383] like Figure 39As shown, an arbitrary point on the liquid crystal display panel 200 is defined as point P, and the origin O on the color display element 100 is aligned with point P when viewed from above. With the color display element 100 fixed, the liquid crystal display panel 200 is moved in the 0°-180° direction and the 90°-270° direction so that the arbitrary point P on the liquid crystal display panel 200 overlaps with the 3201 measurement points arranged in a grid pattern. The number of such movements is 96 in the 0°-180° direction (= 3 ÷ 0.25 × 8), and 32 in the 90°-270° direction (= 1 ÷ 0.25 × 8), for a total of 3200 times (= (96 + 1) × (32 + 1) - 1). For each of the 3201 measurement points, the effective transmission area for the same color of red, green, and blue is calculated. In addition, the total amount of the maximum value, minimum value, and average value of the same-color effective transmission area is calculated based on all the data of the same-color effective transmission area obtained at each of the measurement points, and the number of data is equal to the number of measurement points.

[0384] When applied to the above equations (1) and (2), the above S Max is the maximum value of the above 3201 same-color effective transmission areas. Min is the minimum value of the above 3201 same-color effective transmission areas. Ave is the average value of the 3201 same-color effective transmission areas. In the fifth embodiment, all of the red sub-pixels, green sub-pixels, and blue sub-pixels satisfy the above equations (1) and (2).

[0385] exist Figure 39 In the embodiment, the liquid crystal display panel 200 has the first bus 201 and the second bus 202, but in the case where the liquid crystal display panel 200 is Figures 17 to 19 Even when the liquid crystal display panel 200 has redundant wiring, auxiliary capacitor wiring, etc., as shown, it is more preferable to satisfy the above equations (1) and (2). When the liquid crystal display panel 200 has redundant wiring, the above sub-pixel effective transmission area is the area obtained by subtracting the area overlapping with the first bus line, the second bus line, and the redundant wiring from the area of ​​the opening area of ​​the sub-pixel when viewed from above. When the liquid crystal display panel 200 has auxiliary capacitor wiring, the above sub-pixel effective transmission area is the area obtained by subtracting the area overlapping with the first bus line, the second bus line, and the auxiliary capacitor wiring from the area of ​​the opening area of ​​the sub-pixel when viewed from above.

[0386] use Figure 54 To illustrate the above formula (S Max -S Ave )÷S AveIn the above formula (S), it is preferably 0.25 or less (the above formula (1)), more preferably 0.1 or less (the above formula (3)). Ave -S Min )÷S Ave The reason why it is preferably 0.25 or less (the above formula (2)), and more preferably 0.1 or less (the above formula (4)). Figure 54 1 and 2 are explanatory diagrams showing color display in which the occurrence of moiré fringes is reproduced, and the luminance of sub-pixels of each color.

[0387] Using a liquid crystal display device with a general color display, the generation of moiré fringes was suspected to be reproduced, and the level at which moiré fringes can be tolerated and the level at which moiré fringes cannot be visually recognized were studied. When the first and second buses overlap with the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B depending on the viewing angle, the brightness decreases according to the overlapping area. Assuming such a brightness change, the brightness of each color is investigated to what extent the brightness changes from the base brightness (brightness A) to be visually recognizable (visual recognition limit) and to what extent the change is permissible (permissible range). If the brightness change is below the permissible range, it can be determined that the generation of moiré fringes has been suppressed. In addition, if the brightness change is below the visual recognition limit, it can be determined that moiré fringes cannot be visually recognized.

[0388] Specifically, if Figure 54 As shown, cyan, magenta, and yellow stripes are displayed.

[0389] The cyan color is displayed by setting the brightness of the green sub-pixel (G brightness) and the brightness of the blue sub-pixel (B brightness) as the base brightness (brightness A) and setting the brightness of the red sub-pixel (R brightness) as the dark brightness (brightness B). The magenta color is displayed by setting the R brightness and B brightness as the base brightness and setting the G brightness as the dark brightness. The yellow color is displayed by setting the R brightness and G brightness as the base brightness and setting the B brightness as the dark brightness. The R brightness, G brightness, and B brightness were changed, and the brightness variation rate at which the brightness variation becomes an allowable range and a visual recognition limit was investigated. The brightness variation rate can be calculated by (brightness A - brightness B) / brightness A. The results are shown in Table 4 below.

[0390]

Table 4

[0391]

[0392] According to the results in Table 4, although it depends on the brightness of the basic luminance, the allowable limit is 25% to 35%, and the visual recognition limit is 10% to 15%. Max -S Ave )÷S Ave and (SAve -S Min )÷S Ave , the preferred upper limit is set to 0.25, and the more preferred upper limit is set to 0.1.

[0393] <Implementation Method 6>

[0394] Figure 40 Schematic cross-sectional view of a display device according to Embodiment 6. Figure 40 As shown, in the display device 1001 of embodiment 6, when the liquid crystal layer possessed by the liquid crystal display panel described in embodiment 1 is set as the first liquid crystal layer, the color display element is a liquid crystal element having a color filter substrate and the second liquid crystal layer, the color filter substrate has a color filter, the second liquid crystal layer is clamped by the color filter substrate and the relative substrate of the liquid crystal display panel, and has a first polarizing plate, the color filter substrate, the second liquid crystal layer, a polarizing layer, the relative substrate, the first liquid crystal layer, the TFT substrate, and a second polarizing plate in sequence, and the relative substrate has a plurality of switching elements on the surface of the polarizing layer side for adjusting the voltage applied to the second liquid crystal layer.

[0395] like Figure 45 As shown, in conventional dual-cell displays, a diffusion layer, such as OCA 2050, is provided between the front panel 2100 and the rear panel 2200 to minimize the visual appearance of moiré fringes. For the diffusion layer to fully utilize its diffusion properties, it must be approximately 100 μm thick, making it difficult to incorporate a diffusion layer within the internal structure of the front panel 2100 or the rear panel 2200. Therefore, the front panel 2100 and the rear panel 2200 must be separately manufactured and sandwiched between a pair of glass substrates, such as glass substrates, and then bonded together, requiring four glass substrates. On the other hand, using the configurations of Embodiments 1 to 4 above minimizes the occurrence of moiré fringes, eliminating the need for a diffusion layer. Therefore, there is no need to provide a distance between the color display element and the liquid crystal display panel to maximize diffusion properties. This allows the dual-cell display to be manufactured through a series of manufacturing steps, reducing the number of glass substrates from four to three.

[0396] Specifically, the display device of Embodiment 6 can be manufactured through the following steps.

[0397] 1. In Figure 40 The surface of the opposite substrate 1230 of the liquid crystal display panel 1200 shown in the figure is formed with gate lines, source lines, TFTs, pixel electrodes, etc. for applying voltage to the second liquid crystal layer 120, and a polarizing layer 1020 is formed on the above-mentioned pixel electrodes.

[0398] 2. Forming color filters on the color filter substrate 130 .

[0399] 3. The display electrodes, first and second bus lines, TFTs, and the like described in Embodiments 1 to 4 are formed on the TFT substrate 210 of the liquid crystal display panel 1200 .

[0400] 4. The color filter substrate 130 and the counter substrate 1230 are bonded together so that the surface on which the color filter is formed faces the surface on which the polarizing layer 1020 is formed. Liquid crystal material is sealed between the two substrates to form the second liquid crystal layer 120 .

[0401] 5. The counter substrate 1230 is bonded together so that the surface opposite to the surface on which the polarizing layer 1020 is formed faces the surface of the TFT substrate 210 on which the display electrodes are formed, and a liquid crystal material is sealed between the two substrates to form the first liquid crystal layer 220.

[0402] 6. Attach the first polarizing plate 10 to the color filter substrate 130 side, and attach the second polarizing plate 20 to the TFT substrate 210 side.

[0403] 7. The panel formed in 6. above is mounted with necessary components such as a circuit substrate and a backlight.

[0404] The polarizing layer 1020 can be fabricated, for example, by applying a photopolymerizable liquid crystal material and irradiating it with ultraviolet light. Examples of the structure of the photopolymerizable liquid crystal material include structures having photopolymerizable groups, such as acrylate and methacrylate groups, at the ends of the liquid crystal molecule backbone. Furthermore, in this embodiment, to prevent damage to the polarizing layer due to temperature fluctuations during the formation of the gate lines, source lines, TFTs, and pixel electrodes, the polarizing layer is formed after the gate lines, source lines, TFTs, and pixel electrodes. However, depending on the material, the polarizing layer can also be formed first.

[0405] Alternatively, the polarization axes of the first polarizing plate 10 and the polarizing layer 1020 may be orthogonal to each other, the polarization axes of the polarizing layer 1020 and the second polarizing plate may be orthogonal to each other, and the polarization axes of the first polarizing plate 10 and the second polarizing plate 20 may be parallel to each other.

[0406] <Implementation Method 7>

[0407] Figure 41 : is a schematic cross-sectional view of a display device according to Embodiment 7. Figure 41 As shown, in the display device 1002 of Embodiment 7, the liquid crystal display panel 200 is the front panel and the color display element 100 is the back panel. The display device 1002 is arranged in this order: the liquid crystal display panel 200, the color display element 100, and the backlight 300.

[0408] In the first embodiment, dual-unit signal processing is performed based on a single input video signal to generate video signals for display on the color display element 100 and the liquid crystal display panel 200, respectively, resulting in a high-contrast display. In contrast, in the seventh embodiment, the videos displayed on the color display element 100 and the liquid crystal display panel 200 are input as independent first and second video signals from a synchronized video signal source via different TCONs, and a lighting signal is input from the backlight driver circuit to the backlight 300. Independent video can be displayed on the color display element 100 and the liquid crystal display panel 200, enabling a variety of video presentations. This makes it suitable for use in high-performance entertainment devices, for example.

[0409] The color display element 100 and the liquid crystal display panel 200 can be the same as those described in Embodiments 1 to 4. Preferably, the liquid crystal display panel 200 does not have a color filter, and the backlight 300 is driven by a field sequential method.

[0410] It is preferred that the interval L1 between the first liquid crystal layer 220 and the second liquid crystal layer 120 in the thickness direction of the display device 1 is 0.1 times or more the longer of the maximum length of one display unit 205 in the first direction D1 and the maximum length of one display unit 205 in the second direction D2. Figure 41 In the embodiment, L1 is the distance from the surface of the first liquid crystal layer 220 on the TFT substrate 210 side to the surface of the second liquid crystal layer 120 on the color filter substrate 130 side. If L1 is less than 0.1 times the longer of the maximum length of a display unit 205 in the first direction D1 and the maximum length of a display unit 205 in the second direction D2, moiré fringes will not occur. The upper limit of L1 is not particularly limited, but can be 5000 times the longer of the maximum length of a display unit 205 in the first direction D1 and the maximum length of a display unit 205 in the second direction D2. Furthermore, unlike in Embodiment 1, double images, where the displayed image appears double, are not a problem. Therefore, L1 can be appropriately set from the perspective of performance quality. Specifically, L1 can be 50 cm or less.

[0411] Conventional dual-cell displays have been designed with a spacing of several to several dozen centimeters between the two panels to prevent moiré fringes. However, this wide spacing between the panels has become a constraint on video performance, hindering attractive presentations. The display device of Embodiment 7 is less susceptible to moiré fringes, allowing for flexible adjustment of the distance between the liquid crystal display panel 200 and the color display element 100, enabling highly entertaining video presentations.

[0412] <Implementation Method 8>

[0413] In Embodiment 8, the color display element is a reflective liquid crystal display element. Since the color display element is a reflective liquid crystal display element, a backlight is not required, thereby reducing power consumption. Figure 42 This is a schematic cross-sectional view of a display device according to Embodiment 8. Figure 43 This is a schematic cross-sectional view of a color display element according to Embodiment 8. Description of the configuration common to other embodiments will be omitted.

[0414] like Figure 42 As shown, in display device 1003 according to Embodiment 8, liquid crystal display panel 200 is the front panel, and color display element 1100A is the rear panel. When the liquid crystal layer included in liquid crystal display panel 200 is a first liquid crystal layer 220, color display element 1100A is a liquid crystal element having a second liquid crystal layer 120 sandwiched between a pair of substrates. Of the pair of substrates, substrate 1110A, located on the rear side of the display device, has a reflective member on the side opposite to second liquid crystal layer 120. Examples of the pair of substrates include color filter substrate 130 and TFT substrate 1110A.

[0415] like Figure 43 As shown, the TFT substrate 1110A may include a supporting substrate 111, such as a glass substrate, and a pixel electrode 1104. Examples of the reflective member include the pixel electrode 1104. The pixel electrode 1104 is preferably a reflective electrode formed of a metal such as silver or aluminum. The color filter substrate 130 may include a counter electrode 1114 for forming an electric field between the pixel electrode 1104 and the second liquid crystal layer 120.

[0416] In embodiment 8, as in embodiment 7, the video displayed on the color display element 1100A and the liquid crystal display panel 200 can be input from a synchronous video signal source via different TCONs as an independent first video signal and a second video signal. Alternatively, as in embodiment 1, dual-unit signal processing can be performed based on one input video signal to produce video signals that are displayed on the color display element 1100A and the liquid crystal display panel 200, respectively.

[0417] <Implementation Method 9>

[0418] Figure 44 : is a schematic cross-sectional view of a display device according to Embodiment 9. Figure 44 As shown, in the display device 1004 of Embodiment 9, the liquid crystal display panel 200 is the front panel, and the color display element 1100B is the rear panel.

[0419] In Embodiment 9, the video displayed on color display element 1100B and liquid crystal display panel 200 is input as independent first and second video signals from a synchronized video signal source via different TCONs. Independent video can be displayed on color display element 1100B and liquid crystal display panel 200, enabling a variety of video presentations. Liquid crystal display panel 200 can be the same as that described in Embodiments 1 to 4.

[0420] Preferably, the color display element 1100B includes a light-emitting layer 1120. The light-emitting layer 1120 can be disposed between a pair of substrates, such as the TFT substrate 1110B and the counter substrate 1130. The light-emitting layer 1120 can include self-luminous elements such as organic light-emitting diodes (OLEDs), quantum dot light-emitting diodes (QLEDs), and micro-LEDs. The micro-LEDs can be tiny inorganic LEDs (e.g., larger than 3 μm and smaller than 3000 μm). In other words, the color display element 1100B can be a self-luminous panel such as an OLED display, a QLED display, or a μ-display.

[0421] The first polarizing plate 10, liquid crystal display panel 200, second polarizing plate 20, and color display element 1100B may be stacked in this order. The liquid crystal display panel 200 and color display element 1100B may be bonded together using highly transparent OCA 40. The haze value of the entire display device 1004 in white display is preferably 79% or less.

[0422] It is preferred that the interval L2 between the first liquid crystal layer 220 and the light emitting layer 1120 in the thickness direction of the display device is 0.1 times or more the longer of the maximum length of one display unit 205 in the first direction D1 and the maximum length of one display unit 205 in the second direction D2. Figure 44In the embodiment, L2 is the distance from the surface of the first liquid crystal layer 220 on the TFT substrate 210 side to the surface of the light-emitting layer 1120 on the opposite substrate 1130 side. When L2 is less than 0.1 times the longer of the maximum length of a display unit 205 in the first direction D1 and the maximum length of a display unit 205 in the second direction D2, moiré fringes will not occur. The upper limit of L2 is not particularly limited and can be 5000 times the longer of the maximum length of a display unit 205 in the first direction D1 and the maximum length of a display unit 205 in the second direction D2. Furthermore, unlike in Embodiment 1, double images, where the displayed image appears double, are not a problem. Therefore, L2 can be appropriately set from the perspective of the performance effect. Specifically, L2 can be 50 cm or less.

Claims

1. A display device, characterized in that: have: A color display element having a plurality of pixels including sub-pixels of different colors arranged in row and column directions; and A liquid crystal display panel, which is stacked with the above-mentioned color display element, The liquid crystal display panel includes a TFT substrate, an opposing substrate, and a liquid crystal layer sandwiched between the TFT substrate and the opposing substrate. The TFT substrate includes: a plurality of first bus lines extending while curving in a first direction; a plurality of second bus lines extending while curving in a second direction intersecting the first direction; and a plurality of display electrodes arranged corresponding to positions where the plurality of first bus lines intersect the plurality of second bus lines. The plurality of first buses are formed into a diamond lattice pattern in which the distance between two adjacent first buses varies. The plurality of second buses are formed into a diamond lattice pattern in which the distance between two adjacent second buses varies. At least one of the plurality of first bus lines and at least one of the plurality of second bus lines overlap with sub-pixels of all colors included in the color display element in a plan view.

2. The display device according to claim 1, wherein The first direction is parallel to the row direction, and the second direction is parallel to the column direction.

3. The display device according to claim 1, wherein At least one of the plurality of first buses comprises a plurality of straight sections, The bending angle formed by the first direction and the straight portion is within 45°±15°.

4. The display device according to claim 1, wherein At least one of the plurality of second buses comprises a plurality of straight sections, The bending angle formed by the second direction and the straight portion is within 45°±15°.

5. The display device according to claim 1, wherein At least one first bus among the plurality of first buses and at least one second bus among the plurality of second buses respectively include a plurality of straight line portions. The bending angle formed by the first direction and the straight portion included in the first bus is within 45°±15°, and The bending angle formed by the second direction and the straight portion included in the second bus is within 45°±15°.

6. The display device according to claim 1, wherein The total width of the bends of the plurality of first bus lines in a direction perpendicular to the first direction is not less than 0.75 times and not more than 1.25 times the length of the display region of the liquid crystal display panel in the direction perpendicular to the first direction.

7. The display device according to claim 1, wherein The total width of the bends of the plurality of second bus lines in a direction perpendicular to the second direction is not less than 0.75 times and not more than 1.25 times the length of the display region of the liquid crystal display panel in the direction perpendicular to the second direction.

8. The display device according to claim 1, wherein The total width of the bends of the plurality of first bus lines in a direction perpendicular to the first direction is not less than 0.75 times and not more than 1.25 times the length of the display area of ​​the liquid crystal display panel in the direction perpendicular to the first direction, and The total width of the bends of the plurality of second bus lines in a direction perpendicular to the second direction is not less than 0.75 times and not more than 1.25 times the length of the display region of the liquid crystal display panel in the direction perpendicular to the second direction.

9. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. A bending period of the first bus line is less than or equal to three times the maximum length of one of the display units in the first direction.

10. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. A bending period of the second bus line is less than or equal to three times the maximum length of one of the display units in the second direction.

11. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. The bending period of the first bus is less than or equal to three times the maximum length of one of the display units in the first direction, and A bending period of the second bus line is less than or equal to three times the maximum length of one of the display units in the second direction.

12. The display device according to claim 1, wherein The portions of the two adjacent first bus lines at which the distance is shortest overlap with the display electrodes in a plan view.

13. The display device according to claim 1, wherein The portions of two adjacent second bus lines that are closest to each other overlap with the display electrodes in a plan view.

14. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. For one first bus bar, a rectangular area having a width of the bend in a direction perpendicular to the first direction as a short side and a length of the first bus bar in the first direction as a long side is defined as the area where the first bus bar exists. When viewed from above, the areas where two adjacent first buses exist do not overlap. The distance between two adjacent first bus line existence areas in a direction perpendicular to the first direction is 0.25 times or less of the maximum length of one display unit in the direction perpendicular to the first direction.

15. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. For one second bus bar, a rectangular area having a width of the bend in a direction perpendicular to the second direction as a short side and a length of the one second bus bar in the second direction as a long side is defined as the area where the one second bus bar exists. When viewed from above, the areas where two adjacent second buses exist do not overlap. The distance between two second bus line existence areas adjacent to each other in a direction perpendicular to the second direction is not more than 0.25 times the maximum length of one display unit in the direction perpendicular to the second direction.

16. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. For one first bus line, a rectangular area having a width of the bend in a direction perpendicular to the first direction as a short side and a length of the first bus line in the first direction as a long side is defined as an area where the first bus line exists. For one second bus bar, when a rectangular area having a width of the bend in a direction perpendicular to the second direction as a short side and a length of the one second bus bar in the second direction as a long side is defined as the area where the one second bus bar exists, In a plan view, the existence areas of two adjacent first bus lines do not overlap, and The existence areas of two adjacent second bus lines do not overlap when viewed from above. The distance between two adjacent first bus line existence areas in a direction perpendicular to the first direction is 0.25 times or less of the maximum length of one display unit in the direction perpendicular to the first direction. The distance between two second bus line existence areas adjacent to each other in a direction perpendicular to the second direction is not more than 0.25 times the maximum length of one display unit in the direction perpendicular to the second direction.

17. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. For one first bus bar, a rectangular area having a width of the bend in a direction perpendicular to the first direction as a short side and a length of the first bus bar in the first direction as a long side is defined as the area where the first bus bar exists. When viewed from above, the existence areas of two adjacent first buses overlap. An overlapping width of two adjacent first bus line existence regions in a direction perpendicular to the first direction is 0.25 times or less of a maximum length of one display unit in the direction perpendicular to the first direction.

18. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. For one second bus bar, a rectangular area having a width of the bend in a direction perpendicular to the second direction as a short side and a length of the one second bus bar in the second direction as a long side is defined as the area where the one second bus bar exists. When viewed from above, the existence areas of two adjacent second buses overlap. An overlapping width of two second bus line existence regions adjacent to each other in a direction perpendicular to the second direction is equal to or less than 0.25 times the maximum length of one display unit in the direction perpendicular to the second direction.

19. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. For one first bus line, a rectangular area having a width of the bend in a direction perpendicular to the first direction as a short side and a length of the first bus line in the first direction as a long side is defined as an area where the first bus line exists. For one second bus bar, when a rectangular area having a width of the bend in a direction perpendicular to the second direction as a short side and a length of the one second bus bar in the second direction as a long side is defined as the area where the one second bus bar exists, In a plan view, the existence areas of two adjacent first bus lines overlap, and The existence areas of two adjacent second bus lines overlap when viewed from above. The overlapping width of the existence areas of two adjacent first bus lines in a direction perpendicular to the first direction is not more than 0.25 times the maximum length of one display unit in the direction perpendicular to the first direction. An overlapping width of two second bus line existence regions adjacent to each other in a direction perpendicular to the second direction is equal to or less than 0.25 times the maximum length of one display unit in the direction perpendicular to the second direction.

20. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. The plurality of first buses each have a plurality of bending points. In adjacent first bus lines, a distance perpendicular to the first direction between the closest bending points is not more than 0.25 times the maximum length of one display unit in a direction perpendicular to the first direction.

21. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. The plurality of second buses each have a plurality of bending points. In adjacent second bus lines, a distance perpendicular to the second direction between the closest bending points is not more than 0.25 times the maximum length of one display unit in a direction perpendicular to the second direction.

22. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. The plurality of first buses each have a plurality of bending points. In adjacent first bus lines, the distance between the nearest bending points perpendicular to the first direction is not more than 0.25 times the maximum length of one display unit in the direction perpendicular to the first direction, and The plurality of second buses each have a plurality of bending points. In adjacent second bus lines, a distance perpendicular to the second direction between the closest bending points is not more than 0.25 times the maximum length of one display unit in a direction perpendicular to the second direction.

23. The display device according to claim 1, wherein In the above sub-pixels of different colors possessed by the above color display element, In a plan view, the area obtained by subtracting the area of ​​the opening region of the sub-pixel from the area of ​​the overlapping areas of the plurality of first bus lines and the plurality of second bus lines of the liquid crystal display panel is defined as the sub-pixel effective transmission area. Regarding the N pixels included in the region of the color display element having N pixels in the row direction and N pixels in the column direction, 2 pixels, where N is an integer greater than 2, and when the sum of the effective transmission areas of the above sub-pixels of the same color is set as the same-color effective transmission area, In the above N 2 On each pixel, a plurality of measurement points are set in a grid pattern with a predetermined width in the row direction and the column direction. When the liquid crystal display panel is moved in the row direction and the column direction while the color display element is fixed, and the same-color effective transmission area is obtained for each of the measurement points, The same-color effective transmission area of ​​each color satisfies the following equations (1) and (2): (S Max -S Ave ) ÷S Ave ≤ 0.25 (1) (S Ave -S Min ) ÷S Ave ≤ 0.25 (2) Among them, the above S Max is the maximum value of the same-color effective transmission area obtained at each of the measurement points, The above S Min is the minimum value of the same-color effective transmission area obtained at each of the above measurement points, The above S Ave It is the average value of the same-color effective transmission area obtained at each of the measurement points.

24. The display device according to claim 23, wherein: The same-color effective transmission area of ​​each color satisfies the following equations (3) and (4): (S Max -S Ave ) ÷S Ave ≤ 0.1 (3) (S Ave -S Min ) ÷S Ave ≤ 0.1 (4)。 25. The display device according to claim 1, wherein The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. The area of ​​one display unit is larger than the area of ​​one pixel included in the color display element.

26. The display device according to claim 1, wherein The outer edge of the pixel electrode arranged for each of the sub-pixels included in the color display element includes at least one straight line portion. In a plan view, an extending direction of the straight portion of the pixel electrode intersects with an extending direction of all sides constituting an outer edge of the display electrode included in the liquid crystal display panel.

27. The display device according to claim 26, wherein: An angle formed between an extending direction of the straight portion of the pixel electrode and an extending direction of at least one side constituting an outer edge of the display electrode is not less than 30° and not more than 60°.

28. The display device according to claim 1, wherein The display electrodes are in the shape of a quadrilateral.

29. The display device according to claim 1, wherein The display electrode is in a rectangular shape.

30. The display device according to claim 29, wherein The display electrode has a rectangular shape, and the length of the long side is not less than 1.5 times and not more than 2.5 times the length of the short side.

31. The display device according to claim 1, wherein In a plan view, at least one of the plurality of first bus lines includes a first electrode overlapping portion overlapping at least one of the plurality of display electrodes.

32. The display device according to claim 31, wherein: The total length of the first electrode overlapping portions in one first bus bar is 75% or more of the entire length of the one first bus bar.

33. The display device according to claim 1, wherein In a plan view, at least one of the plurality of second bus lines includes a second electrode overlapping portion overlapping at least one of the plurality of display electrodes.

34. The display device according to claim 33, wherein: The total length of the second electrode overlapping portions in one second bus bar is 75% or more of the entire length of the one second bus bar.

35. The display device according to claim 1, wherein In a plan view, at least one of the plurality of first bus lines includes a first electrode overlapping portion overlapping at least one of the plurality of display electrodes, and In a plan view, at least one of the plurality of second bus lines includes a second electrode overlapping portion overlapping at least one of the plurality of display electrodes.

36. The display device according to claim 35, characterized in that The total length of the first electrode overlapping portions in one first bus bar is 75% or more of the total length of the first bus bar, and The total length of the second electrode overlapping portions in one second bus bar is 75% or more of the entire length of the one second bus bar.

37. The display device according to claim 1, wherein The TFT substrate of the liquid crystal display panel includes a supporting base material, the first bus line, the first insulating layer, the second bus line, the second insulating layer, and the display electrodes arranged in this order.

38. The display device according to claim 37, wherein: A transparent conductive layer and a third insulating layer are provided between the second insulating layer and the display electrode from the second insulating layer side.

39. The display device according to claim 38, wherein: In a plan view, the first bus line includes a first electrode overlapping portion that overlaps with at least one display electrode among the plurality of display electrodes. The transparent conductive layer is arranged to overlap with the first electrode overlapping portion.

40. The display device according to claim 38, wherein In a plan view, the second bus line includes a second electrode overlapping portion that overlaps at least one display electrode among the plurality of display electrodes. The transparent conductive layer is arranged to overlap with the second electrode overlapping portion.

41. The display device according to claim 38, wherein In a plan view, at least one of the plurality of first buses includes a first electrode overlapping portion overlapping at least one of the plurality of display electrodes, and at least one of the plurality of second buses includes a second electrode overlapping portion overlapping at least one of the plurality of display electrodes. The transparent conductive layer is arranged to overlap the first electrode overlapping portion and the second electrode overlapping portion.

42. The display device according to claim 1, wherein The liquid crystal display panel does not include a light shielding member between adjacent display electrodes in a plan view.

43. The display device according to claim 1, wherein The haze value of the entire display device in white display is 79% or less.

44. The display device according to claim 1, wherein The haze value of the entire display device in white display is 50% or less.

45. The display device according to claim 1, wherein When the liquid crystal layer of the liquid crystal display panel is set as the first liquid crystal layer, The color display element is a liquid crystal element having a second liquid crystal layer sandwiched between a pair of substrates. The first polarizing plate, the color display element, the second polarizing plate, the liquid crystal display panel, and the third polarizing plate are stacked in this order.

46. ​​The display device according to claim 1, wherein When the liquid crystal layer of the liquid crystal display panel is set as the first liquid crystal layer, The color display element is a liquid crystal element having a color filter substrate and a second liquid crystal layer, wherein the color filter substrate has a color filter. The second liquid crystal layer is sandwiched between the color filter substrate and the opposing substrate of the liquid crystal display panel. The device comprises, in order, a first polarizing plate, the color filter substrate, the second liquid crystal layer, a polarizing layer, the counter substrate, the first liquid crystal layer, the TFT substrate, and a second polarizing plate. The counter substrate has a plurality of switching elements for adjusting a voltage applied to the second liquid crystal layer on a surface on the polarizing layer side.

47. The display device according to claim 1, wherein The liquid crystal display panel is the front panel, and the color display element is the rear panel. When the liquid crystal layer of the liquid crystal display panel is set as the first liquid crystal layer, The color display element is a liquid crystal element having a second liquid crystal layer sandwiched between a pair of substrates. The substrate located on the rear side of the display device among the pair of substrates includes a reflective member on the side facing the second liquid crystal layer.

48. The display device according to claim 46 or 47, characterized in that The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. The distance between the first liquid crystal layer and the second liquid crystal layer in the thickness direction of the display device is 0.1 times or more the longer of the maximum length of one display unit in the first direction and the maximum length of one display unit in the second direction.

49. The display device according to claim 1, wherein The color display element is the front panel, and the liquid crystal display panel is the rear panel. The color display element, the liquid crystal display panel, and the backlight are arranged in this order.

50. The display device according to claim 1, wherein The liquid crystal display panel is the front panel, and the color display element is the rear panel. The liquid crystal display panel, the color display element, and the backlight are arranged in this order.

51. The display device according to claim 1, wherein The counter substrate of the liquid crystal display panel includes a color filter.

52. The display device according to claim 49 or 50, characterized in that The backlight source includes light-emitting elements of multiple colors. The light emitting elements of the plurality of colors are driven in a field sequential manner in which they are lit in a time-sharing manner, so that the liquid crystal display panel performs color display.

53. The display device according to claim 1, wherein The liquid crystal display panel is the front panel, and the color display element is the rear panel. The above-mentioned color display element has a light-emitting layer.

54. The display device according to claim 53, wherein: The liquid crystal display panel includes a plurality of display units each of which is provided with the display electrodes. The distance between the liquid crystal layer and the light-emitting layer in the thickness direction of the display device is 0.1 times or more the longer of the maximum length of one display unit in the first direction and the maximum length of one display unit in the second direction.

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