Pixel unit, pixel array and display panel

Abstract

According to the pixel unit, the pixel array and the display panel, the pixel unit comprises a plurality of sub-pixels, the sub-pixels are distributed in a row and column array mode, the sub-pixels comprise a plurality of corresponding liquid crystal signal electrodes, in the row direction and the column direction, the extending directions of every two adjacent liquid crystal signal electrodes intersect, and the extending directions of every two adjacent liquid crystal signal electrodes intersect with each other. And included angles between at least two adjacent liquid crystal signal electrodes and the column direction are different. Therefore, the brightness difference of the display panel in each visual angle direction is basically consistent, the difference is reduced, cross grains are improved, and the brightness uniformity of the display panel is improved.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal display technology, and in particular to a pixel unit, a pixel array and a display panel. Background Art

[0002] Since its first application in displays in 1968, liquid crystal display (LCD) technology has evolved from dynamic scattering (DS-LCD), twisted nematic (TN-LCD), to super twisted nematic (STN-LCD). In the 1990s, TFT-LCD (Thin Film Transistor-Liquid Crystal Display) technology became mainstream. Its core technology utilizes a TFT active matrix to independently control each pixel, significantly improving response speed, contrast, and resolution, enabling high-quality image display. TFTs act as pixel switches, precisely controlling the voltage to adjust the deflection of liquid crystal molecules, thereby controlling the transmittance of the backlight and achieving high-quality displays.

[0003] TFT liquid crystal display technology has low-resolution pixel design application scenarios and high-resolution pixel design application scenarios. In the low-resolution pixel design application scenario, the display effect of the TFT liquid crystal display panel still needs to be improved. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a pixel unit, a pixel array and a display panel to improve the display effect of a TFT liquid crystal display panel.

[0005] In order to solve the above technical problems, the technical solution of the present invention provides a pixel unit, including: a plurality of sub-pixels, wherein the plurality of sub-pixels are distributed in an array of rows and columns, and the plurality of sub-pixels include corresponding liquid crystal signal electrodes. In the row direction and the column direction, the extension directions of two adjacent liquid crystal signal electrodes intersect, and the angles between at least two adjacent liquid crystal signal electrodes and the column direction are different.

[0006] Correspondingly, an embodiment of the present invention further provides a display panel, comprising the above-mentioned pixel array, including: a color filter substrate, the color filter substrate including a plurality of pixel unit areas, the pixel unit area including a plurality of sub-pixel areas, the plurality of sub-pixel areas being distributed in an array of rows and columns; a TFT array substrate, the TFT array substrate being provided with a plurality of liquid crystal signal electrodes, the plurality of liquid crystal signal electrodes corresponding one-to-one to the plurality of sub-pixel areas, and in the row direction and the column direction, the extension directions of two adjacent liquid crystal signal electrodes intersect, and the angles between at least two adjacent liquid crystal signal electrodes and the column direction are different; and a liquid crystal layer located between the color filter substrate and the TFT array substrate.

[0007] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0008] In the pixel unit of the present invention, the extension directions of two adjacent liquid crystal signal electrodes intersect in the row direction and the column direction, and the angles between at least two adjacent liquid crystal signal electrodes and the column direction are different, so that the liquid crystal signal electrodes are staggered in the row direction and the column direction, and the liquid crystal molecules in the subsequent sub-pixel area are controlled in direction by the liquid crystal signal electrodes. By controlling the setting direction of the liquid crystal signal electrodes, the liquid crystal distribution in the sub-pixel area can compensate for each other, so that the difference in liquid crystal phase delay controlled by the two adjacent liquid crystal signal electrodes is reduced, the transmittance of the liquid crystal is proportional to the square of the liquid crystal phase delay, the liquid crystal phase delay difference is reduced, and thus the brightness difference in the area controlled by the two adjacent liquid crystal signal electrodes is also reduced, so that the display panel is less likely to have display defects such as horizontal stripes in various viewing angle directions, thereby improving the brightness uniformity of the display panel.

[0009] The display panel of the present invention includes a pixel array composed of a plurality of pixel units. By controlling the setting direction of the liquid crystal signal electrodes, the liquid crystal distribution in the sub-pixel area can compensate for each other, thereby reducing the difference in liquid crystal phase delay controlled by two adjacent liquid crystal signal electrodes. The transmittance of the liquid crystal is proportional to the square of the liquid crystal phase delay. The liquid crystal phase delay difference is reduced, and thus the brightness difference in the area controlled by two adjacent liquid crystal signal electrodes is also reduced. Therefore, the display panel is less likely to have display defects such as horizontal stripes in various viewing angle directions, thereby improving the brightness uniformity of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the viewing angle of the display panel;

[0011] Figure 2 It is a schematic diagram of the structure of a display panel;

[0012] Figure 3 It is a brightness data graph of a display panel at various viewing angles;

[0013] Figures 4 to 6 is a schematic structural diagram of a pixel unit in one embodiment of the present invention;

[0014] Figure 7 is a schematic diagram of the arrangement of a pixel array in one embodiment of the present invention;

[0015] Figures 8 to 11 is a schematic structural diagram of a pixel unit in another embodiment of the present invention;

[0016] Figure 12 is a schematic diagram of the arrangement of a pixel array in another embodiment of the present invention;

[0017] Figure 13is a simulation schematic diagram of adjacent liquid crystal signal electrodes controlling liquid crystal in an embodiment of the present invention;

[0018] Figure 14 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

[0019] Figure 15 FIG. 1 is a schematic structural diagram of a display panel in another embodiment of the present invention. DETAILED DESCRIPTION

[0020] As described in the background art, in low-resolution pixel design application scenarios, the display effect of TFT liquid crystal display panels needs to be improved. This will now be analyzed and explained in conjunction with specific embodiments.

[0021] Figure 1 It is a schematic diagram of the structure of a display panel; Figure 2 This is a schematic diagram of the viewing angle of a display panel.

[0022] The display panel includes: a color filter substrate, the color filter substrate includes a plurality of pixel unit areas, the pixel unit areas include a plurality of sub-pixel areas, and the plurality of sub-pixel areas are arranged in an array of rows and columns; a TFT array substrate 100, the TFT array substrate 100 is provided with a plurality of liquid crystal signal electrodes, and the plurality of liquid crystal signal electrodes correspond one-to-one to the plurality of sub-pixel areas; and a liquid crystal layer located between the color filter substrate and the TFT array substrate.

[0023] In this embodiment, the display panel further includes: a chip (IC) disposed at one end of the display panel along the first direction Y; and a flexible circuit board 110 connected to the chip.

[0024] In this embodiment, the first direction Y is the length direction of the display panel, and the second direction X perpendicular to the first direction Y is the width direction of the display panel.

[0025] Please refer to Figure 1 , Figure 1 A schematic diagram of the arrangement of several liquid crystal signal electrodes on the TFT array substrate 100 is shown. The several liquid crystal signal electrodes include several rows of first electrodes 101 and several rows of second electrodes 102. The several rows of first electrodes 101 and the several rows of second electrodes 102 are alternately arranged in a first direction Y. The several first electrodes 101 in the same row extend in the same direction, and the several second electrodes 102 in the same row extend in the same direction. The extending direction of the first electrodes 101 intersects with the extending direction of the second electrodes 102.

[0026] The pixel design of the display panel is a low ppi (pixel density, Pixels Per Inch) design, and the pixel design of the display panel is less than 290ppi, and one liquid crystal signal electrode corresponds to one sub-pixel area. Figure 1 The arrangement of the liquid crystal signal electrodes shown in FIG. 1 is a 2P2D arrangement, that is, the extension directions of the first electrode 101 and the second electrode 102 corresponding to two adjacent sub-pixel regions in the first direction Y are not parallel.

[0027] In LCDs, the azimuth angle φ and the polar angle θ together form the complete viewing angle coordinate system. The azimuth angle φ is the angle between the projection of the viewing direction onto the screen plane and a reference axis (e.g., the long side of the screen). The azimuth angle φ ranges from 0° to 360°, with the reference direction typically being the right side of the screen (3 o'clock) as 0°. The polar angle θ is the angle between the viewing line of sight and the screen normal (i.e., viewing angle tilt). The polar angle θ ranges from 0° to 90°, with the reference direction typically being the normal as 0°.

[0028] Please continue to refer to Figure 1 and references Figure 2 , Figure 1 The distribution of various azimuth angles φ of the display panel is shown, and the azimuth angles φ include 0°, 90°, 180°, 270° and 360°, wherein the azimuth angle of 270° is the direction of the end where the chip and the flexible circuit board 110 are located. Figure 2 It is a brightness data diagram of a display panel at various azimuth angles, combined with Figure 2 It can be seen that, at an azimuth angle of 90 degrees, as the polar angle θ increases, the brightness difference between the first electrode 101 and the second electrode 102 gradually increases, and the brightness difference may lead to the generation of horizontal stripes.

[0029] Furthermore, the first electrode 101 has the highest brightness at azimuth angles of 135 to 315 degrees, while the second electrode 102 has the highest brightness at azimuth angles of 45 to 225 degrees. Therefore, with a low ppi design, horizontal stripes may appear on the display panel at close angles, with the stripes being most severe at azimuth angles of 45 and 135 degrees, affecting the display quality.

[0030] In order to solve the above problems, the technical solution of the present invention provides a pixel unit, a pixel array and a display panel, in which the extension directions of two adjacent liquid crystal signal electrodes intersect in the row direction and the column direction, and the angles between at least two adjacent liquid crystal signal electrodes and the column direction are different, so that the liquid crystal signal electrodes are staggered in the row direction and the column direction, and the liquid crystal molecules in the subsequent sub-pixel area are controlled by the liquid crystal signal electrodes. By controlling the setting direction of the liquid crystal signal electrodes, the liquid crystal distribution in the sub-pixel area can compensate for each other, so that the difference in liquid crystal phase delay controlled by the two adjacent liquid crystal signal electrodes is reduced, the transmittance of the liquid crystal is proportional to the square of the liquid crystal phase delay, the difference in liquid crystal phase delay is reduced, and thus the brightness difference in the area controlled by the two adjacent liquid crystal signal electrodes is also reduced, so that the display panel is less likely to have display defects such as horizontal stripes in various viewing angle directions, thereby improving the brightness uniformity of the display panel.

[0031] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Figures 4 to 6 FIG. 1 is a schematic structural diagram of a pixel unit in an embodiment of the present invention.

[0033] Please refer to Figures 4 to 6 , Figure 4 is a schematic structural diagram of a pixel unit 2, Figure 5 and Figure 6 They are Figure 4 Schematic diagram of the enlarged structure of two adjacent liquid crystal signal electrodes in a pixel unit 2, wherein the pixel unit 2 includes: a plurality of sub-pixels 20, wherein the plurality of sub-pixels 20 are arranged in an array of rows and columns, and the plurality of sub-pixels 20 include corresponding plurality of liquid crystal signal electrodes. In the row direction X and the column direction Y, the extension directions of the two adjacent liquid crystal signal electrodes intersect, and the angles between the two adjacent liquid crystal signal electrodes and the column direction Y are different.

[0034] The pixel unit 2 is the smallest component of the liquid crystal display. The liquid crystal signal electrode is a key component in the liquid crystal display, responsible for transmitting driving signals to control the arrangement of liquid crystal molecules, thereby adjusting the transmittance of light and forming an image.

[0035] In this embodiment, the row direction X and the column direction Y are perpendicular to each other.

[0036] In this embodiment, the array of rows and columns includes: an N×N array, with the same number of rows and columns, where N is a natural number greater than or equal to 2. Figure 3 Schematically, the number of sub-pixels 20 is 4, and the sub-pixels 20 are distributed in a 2×2 array pixel unit.

[0037] In an N×N array, the extension directions of the N liquid crystal signal electrodes in the same row and column intersect, and the angles between the extension directions of the N liquid crystal signal electrodes in the same row and column and the column direction Y are different. This ensures that the liquid crystal distribution within the sub-pixel region can compensate for each other by controlling the arrangement directions of the liquid crystal signal electrodes. As a result, the difference in liquid crystal phase retardation controlled by two adjacent liquid crystal signal electrodes is reduced. The transmittance of the liquid crystal is proportional to the square of the liquid crystal phase retardation. As the difference in liquid crystal phase retardation is reduced, the difference in brightness within the regions controlled by two adjacent liquid crystal signal electrodes is also reduced. This makes the display panel less susceptible to display defects such as horizontal stripes at all viewing angles, thereby improving the brightness uniformity of the display panel.

[0038] In other embodiments, the sub-pixels may be distributed in arrays of 3×3, 4×4, 5×5, 6×6, 7×7, ..., 10×10, ..., 20×20, etc.

[0039] In this embodiment, the plurality of sub-pixels 20 correspond one-to-one to a plurality of liquid crystal signal electrodes, including a first signal electrode 21 and a second signal electrode 22 , which are adjacent in both the row direction X and the column direction Y.

[0040] In this embodiment, the liquid crystal signal electrode includes N electrically connected branch electrodes, and the extension directions of the N branch electrodes are parallel to each other, where N is a natural number greater than or equal to 2.

[0041] In this embodiment, the liquid crystal signal electrode further includes: a connecting electrode, which is provided at least at one end of the N branch electrodes in the extending direction, and is electrically connected to the N branch electrodes.

[0042] In this embodiment, the material of the liquid crystal signal electrode includes a conductive material with high transparency to avoid affecting the transmittance of light. The transmittance of the material of the liquid crystal signal electrode is greater than a preset value. The conductive material includes indium tin oxide (ITO), fluorine-doped tin oxide (FTO), etc.

[0043] Please refer to Figure 5 , Figure 5 This is an enlarged schematic diagram of the first signal electrode 21. The first signal electrode 21 includes: N electrically connected first branch electrodes 211, the extension directions L1 of the N first branch electrodes 211 are parallel to each other, and the N first branch electrodes 211 are separate from each other; and a first connecting electrode 212, the first connecting electrode 212 is electrically connected to the N first branch electrodes 211.

[0044] In this embodiment, the number of the first branch electrodes 211 is 4. In other embodiments, the number of the first branch electrodes may also be 2, 3, 5, ..., 8, ..., 15, etc.

[0045] In this embodiment, the first connecting electrode 212 is disposed at both ends of the N first branch electrodes 211 in the extension direction L1. In other embodiments, the first connecting electrode can be disposed at only one end of the N first branch electrodes in the extension direction.

[0046] In this embodiment, the extension direction L1 of the first branch electrode 211 is the extension direction of the first signal electrode 21. The extension direction L1 of the first branch electrode 211 and the column direction Y form a first angle α1.

[0047] In this embodiment, the first angle α1 is in the range of 4° to 15°. The first angle α1 within this range results in a faster response time and better transmittance for the display. Furthermore, the voltage-transmittance curve (VT) of the liquid crystal is relatively flat, resulting in better grayscale response, contrast, and display uniformity for the liquid crystal.

[0048] In this embodiment, the first angle α1 includes 4°, 6°, 10°, 12°, and 15°.

[0049] Please refer to Figure 6 , Figure 6 This is an enlarged schematic diagram of the second signal electrode 22. The second signal electrode 22 includes: N electrically connected second branch electrodes 221, the extension directions L2 of the N second branch electrodes 221 are parallel to each other, and the N second branch electrodes 221 are separate from each other; and a second connecting electrode 222, the second connecting electrode 222 is electrically connected to the N second branch electrodes 221.

[0050] In this embodiment, the number of the second branch electrodes 221 is 4. In other embodiments, the number of the second branch electrodes may also be 2, 3, 5, ..., 8, ..., 15, etc.

[0051] In this embodiment, the second connecting electrodes 222 are disposed at both ends of the N first branch electrodes 211 in the extension direction L1. In other embodiments, the first connecting electrode can be disposed at only one end of the N first branch electrodes in the extension direction.

[0052] In this embodiment, the extension direction L2 of the second branch electrode 221 is the extension direction of the second signal electrode 22. The extension direction L2 of the second branch electrode 221 and the column direction Y form a second angle α2.

[0053] In this embodiment, the second angle α2 is in the range of 4° to 15°. Within this range, the second angle α2 provides a faster response time and better transmittance for the display. Furthermore, the voltage-transmittance curve (VT) of the liquid crystal is flatter, resulting in better grayscale response, contrast, and display uniformity.

[0054] In this embodiment, the second angle α2 includes 4°, 6°, 10°, 12°, and 15°.

[0055] In this embodiment, the angles between two adjacent liquid crystal signal electrodes and the column direction Y are different, that is, the first angle α1 between the extension direction L1 of the first branch electrode 211 and the column direction Y is different from the second angle α2 between the extension direction L2 of the second branch electrode 221 and the column direction Y.

[0056] In the row direction X and the column direction Y, the extension direction L1 of the adjacent first signal electrodes 21 intersects the extension direction L2 of the second signal electrodes 22, that is, the extension direction L1 of the adjacent first signal electrodes 21 is not parallel to the extension direction L2 of the second signal electrodes 22, and the angles between the extension direction L1 of the adjacent first signal electrodes 21 and the extension direction L2 of the second signal electrodes 22 and the column direction Y are different. The first signal electrodes 21 and the second signal electrodes 22 are staggered with each other in the row direction X and the column direction Y. The liquid crystal molecules in the subsequent sub-pixel area are controlled by the liquid crystal signal electrodes. By controlling the liquid crystal signal electrodes The setting direction enables the liquid crystal distribution in the sub-pixel area to compensate for each other, so that the difference in liquid crystal phase delay controlled by two adjacent liquid crystal signal electrodes (the first signal electrode 21 and the second signal electrode 22 in the row direction and the column direction) is reduced, and the transmittance of the liquid crystal is proportional to the square of the liquid crystal phase delay. The liquid crystal phase delay difference is reduced, and thus the brightness difference in the area controlled by two adjacent liquid crystal signal electrodes (the first signal electrode 21 and the second signal electrode 22 in the row direction and the column direction) is also reduced, so that the display panel is less likely to have display defects such as horizontal stripes in various viewing angle directions, thereby improving the brightness uniformity of the display panel.

[0057] Specifically, please refer to Figure 13 , Figure 13 1 is a schematic diagram of a simulation of liquid crystal phase delay when adjacent liquid crystal signal electrodes control liquid crystal in an embodiment of the present invention. Figure 13The horizontal axis is a schematic diagram of the positions of adjacent sub-pixels in the row direction X, and the vertical axis is the liquid crystal phase delay retardance (Δnd) corresponding to adjacent liquid crystal signal electrodes. Curve1 and Curve2 represent the phase delay of the liquid crystal controlled by adjacent liquid crystal signal electrodes (first signal electrode 21 and second signal electrode 22), respectively.

[0058] Display transmittance ,in, is the azimuth angle, Δnd is the liquid crystal phase retardation, is the wavelength.

[0059] according to Figure 13 It can be seen that the liquid crystal phase delay difference Δnd of the adjacent liquid crystal signal electrodes represented by Curve1 and Curve2 is very small and basically the same. According to the formula, the transmittance is proportional to (Δnd)^2. Therefore, if the liquid crystal phase delay difference Δnd of the adjacent liquid crystal signal electrodes is small, the brightness difference in the area controlled by the two adjacent liquid crystal signal electrodes will also be reduced, and the display panel will not easily have poor display such as horizontal stripes in various viewing angles.

[0060] In this embodiment, the number of rows is 2, the number of columns is 2, and the extension directions of the liquid crystal signal electrodes of the two sub-pixels are parallel in the diagonal direction of the array. In the diagonal direction of the array, the angles between the two liquid crystal signal electrodes and the column direction are the same.

[0061] That is, in the diagonal direction of the 2×2 array, the extension direction L1 of the two first signal electrodes 21 is parallel, the extension direction L2 of the two second signal electrodes 22 is parallel, the first angle α1 between the extension direction L1 of the two first signal electrodes 21 and the column direction Y is the same, and the second angle α2 between the extension direction L2 of the two second signal electrodes 22 and the column direction Y is the same.

[0062] This makes pixel layout easier to design. Changes to the pixel layout require corresponding changes to the BM design to achieve the optimal aperture ratio. Therefore, a pixel design that is easier to arrange can simplify the design and save costs. Furthermore, in the diagonal direction of the array, the angles between the two liquid crystal signal electrodes and the column direction are the same. This design achieves dual domains in both the row and column directions, compensating for liquid crystal phase retardation. This improves viewing angles and color shift in both the row and column directions, enhancing the display quality.

[0063] Accordingly, the embodiment of the present invention further provides a pixel array, please refer to Figure 7 , Figure 7 The arrangement diagram of the pixel array in one embodiment of the present invention is as follows: Figures 4 to 6The pixel units 2 are arranged in an array of rows and columns.

[0064] The pixel array is a core component of liquid crystal displays and other flat panel display technologies. It is composed of a large number of sub-pixels arranged in a regular pattern. Several sub-pixels are arranged in a regular pattern in the form of pixel units 2. Each sub-pixel is independently controlled to display image details.

[0065] In this embodiment, the array of rows and columns includes an M×N array, where M is a natural number greater than or equal to 1, and N is a natural number greater than or equal to 1. The values of M and N may be the same or different, and the values of M and N are specifically designed according to the area of the display panel.

[0066] Figures 8 to 11 FIG. 1 is a schematic structural diagram of a pixel unit in another embodiment of the present invention.

[0067] Please refer to Figures 8 to 11 , Figure 8 is a schematic structural diagram of a pixel unit 3, Figure 9 、 Figure 10 and Figure 11 They are Figure 8 Schematic diagram of the enlarged structure of three adjacent liquid crystal signal electrodes in a pixel unit 3, wherein the pixel unit 3 includes: a plurality of sub-pixels 30, wherein the plurality of sub-pixels 30 are arranged in an array of rows and columns, and the plurality of sub-pixels 30 include corresponding plurality of liquid crystal signal electrodes. In the row direction X and the column direction Y, the extension directions of the three adjacent liquid crystal signal electrodes intersect, and the angles between the three adjacent liquid crystal signal electrodes and the column direction Y are different.

[0068] The pixel unit 3 is the smallest component of the liquid crystal display. The liquid crystal signal electrode is a key component in the liquid crystal display, responsible for transmitting driving signals to control the arrangement of liquid crystal molecules, thereby adjusting the transmittance of light and forming an image.

[0069] In this embodiment, the row direction X and the column direction Y are perpendicular to each other.

[0070] In this embodiment, the array of rows and columns includes: an N×N array, with the same number of rows and columns, where N is a natural number greater than or equal to 2. Figure 8 Schematically, the number of sub-pixels 30 is 9, and the sub-pixels 30 are distributed in a 3×3 array pixel unit.

[0071] In an N×N array, the extension directions of the N liquid crystal signal electrodes in the same row and column intersect, and the angles between the extension directions of the N liquid crystal signal electrodes in the same row and column and the column direction Y are different. This ensures that the liquid crystal distribution within the sub-pixel region can compensate for each other by controlling the arrangement directions of the liquid crystal signal electrodes. As a result, the difference in liquid crystal phase retardation controlled by two adjacent liquid crystal signal electrodes is reduced. The transmittance of the liquid crystal is proportional to the square of the liquid crystal phase retardation. As the difference in liquid crystal phase retardation is reduced, the difference in brightness within the regions controlled by two adjacent liquid crystal signal electrodes is also reduced. This makes the display panel less susceptible to display defects such as horizontal stripes at all viewing angles, thereby improving the brightness uniformity of the display panel.

[0072] In other embodiments, the sub-pixels may be distributed in arrays of 4×4, 5×5, 6×6, 7×7, ..., 10×10, ..., 20×20, etc.

[0073] In this embodiment, the plurality of sub-pixels 30 correspond one-to-one to a plurality of liquid crystal signal electrodes. The plurality of liquid crystal signal electrodes include a first signal electrode 31, a second signal electrode 32, and a third signal electrode 33. The first signal electrode 31, the second signal electrode 32, and the third signal electrode 33 are arranged adjacent to each other in the row direction X and the column direction Y.

[0074] In this embodiment, the liquid crystal signal electrode includes N electrically connected branch electrodes, and the extension directions of the N branch electrodes are parallel to each other, where N is a natural number greater than or equal to 2.

[0075] In this embodiment, the liquid crystal signal electrode further includes: a connecting electrode, which is provided at least at one end of the N branch electrodes in the extending direction, and is electrically connected to the N branch electrodes.

[0076] In this embodiment, the material of the liquid crystal signal electrode includes a conductive material with high transparency to avoid affecting the transmittance of light. The conductive material includes indium tin oxide (ITO), fluorine-doped tin oxide (FTO), etc.

[0077] Please refer to Figure 9 , Figure 9 This is an enlarged schematic diagram of the first signal electrode 31. The first signal electrode 31 includes: N electrically connected first branch electrodes 311, the extension directions L1 of the N first branch electrodes 311 are parallel to each other, and the N first branch electrodes 311 are separate from each other; and a first connecting electrode 312, the first connecting electrode 312 is electrically connected to the N first branch electrodes 311.

[0078] In this embodiment, the number of the first branch electrodes 311 is 4. In other embodiments, the number of the first branch electrodes may also be 2, 3, 5, ..., 8, ..., 15, etc.

[0079] In this embodiment, the first connecting electrode 312 is disposed at both ends of the N first branch electrodes 311 in the extension direction L1. In other embodiments, the first connecting electrode may be disposed at only one end of the N first branch electrodes in the extension direction.

[0080] In this embodiment, the extension direction L1 of the first branch electrode 311 is the extension direction of the first signal electrode 31. The extension direction L1 of the first branch electrode 311 and the column direction Y form a first angle α1.

[0081] In this embodiment, the first angle α1 is in the range of 4° to 15°. The first angle α1 within this range results in a faster response time and better transmittance for the display. Furthermore, the voltage-transmittance curve (VT) of the liquid crystal is relatively flat, resulting in better grayscale response, contrast, and display uniformity for the liquid crystal.

[0082] In this embodiment, the first angle α1 includes 4°, 6°, 10°, 12°, and 15°.

[0083] Please refer to Figure 10 , Figure 10 This is an enlarged schematic diagram of the second signal electrode 32. The second signal electrode 32 includes: N electrically connected second branch electrodes 321, the extension directions L2 of the N second branch electrodes 321 are parallel to each other, and the N second branch electrodes 321 are separate from each other; and a second connecting electrode 322, the second connecting electrode 322 is electrically connected to the N second branch electrodes 321.

[0084] In this embodiment, the number of the second branch electrodes 321 is 4. In other embodiments, the number of the second branch electrodes may also be 2, 3, 5, ..., 8, ..., 15, etc.

[0085] In this embodiment, the second connecting electrode 322 is disposed at both ends of the N second branch electrodes 321 in the extension direction L2. In other embodiments, the second connecting electrode can be disposed at only one end of the N second branch electrodes in the extension direction.

[0086] In this embodiment, the extension direction L2 of the second branch electrode 321 is the extension direction of the second signal electrode 32. The extension direction L2 of the second branch electrode 321 and the column direction Y form a second angle α2.

[0087] In this embodiment, the second angle α2 is in the range of 4° to 15°. Within this range, the second angle α2 provides a faster response time and better transmittance for the display. Furthermore, the voltage-transmittance curve (VT) of the liquid crystal is flatter, resulting in better grayscale response, contrast, and display uniformity.

[0088] In this embodiment, the second angle α2 includes 4°, 6°, 10°, 12°, and 15°.

[0089] Please refer to Figure 11 , Figure 11 This is an enlarged schematic diagram of the third signal electrode 33. The third signal electrode 33 includes: N electrically connected third branch electrodes 331, the extension directions L3 of the N third branch electrodes 331 are parallel to each other, and the N third branch electrodes 331 are separate from each other; a third connecting electrode 332, and the third connecting electrode 332 is electrically connected to the N third branch electrodes 331.

[0090] In this embodiment, the number of the third branch electrodes 331 is 4. In other embodiments, the number of the third branch electrodes can also be set to 2, 3, 5, ..., 8, ..., 15, etc.

[0091] In this embodiment, the third connection electrode 332 is disposed at both ends of the N third branch electrodes 331 in the extension direction L3. In other embodiments, the third connection electrode can be disposed at only one end of the N third branch electrodes in the extension direction.

[0092] In this embodiment, the extension direction L3 of the third branch electrode 331 is the extension direction of the third signal electrode 33. The extension direction L3 of the third branch electrode 331 and the column direction Y form a third included angle α3.

[0093] In this embodiment, the third angle α3 is in the range of 4° to 15°. Within this range, the third angle α3 provides a faster response time and better transmittance for the display. Furthermore, the voltage-transmittance curve (VT) of the liquid crystal is relatively flat, resulting in better grayscale response, contrast, and display uniformity.

[0094] In this embodiment, the third angle α3 includes 4°, 6°, 10°, 12°, and 15°.

[0095] In this embodiment, the angles between the three adjacent liquid crystal signal electrodes and the column direction Y are different, that is, the first angle α1 between the extension direction L1 of the first branch electrode 311 and the column direction Y, the second angle α2 between the extension direction L2 of the second branch electrode 321 and the column direction Y, and the third angle α3 between the extension direction L3 of the third branch electrode 331 and the column direction Y are different from each other.

[0096] In the row direction X and the column direction Y, the extension direction L1 of the adjacent first signal electrodes 31, the extension direction L2 of the second signal electrodes 32, and the extension direction L3 of the third signal electrodes 33 intersect, that is, the extension direction L1 of the adjacent first signal electrodes 31, the extension direction L2 of the second signal electrodes 32, and the extension direction L3 of the third signal electrodes 33 are not parallel, and the angles between the extension direction L1 of the adjacent first signal electrodes 31, the extension direction L2 of the second signal electrodes 32, and the extension direction L3 of the third signal electrodes 33 and the column direction Y are different. The first signal electrodes 31, the second signal electrodes 32, and the third signal electrodes 33 are staggered in the row direction X and the column direction Y. The liquid crystal molecules in the subsequent sub-pixel area are affected by the liquid crystal signal electrodes. The direction is controlled by the electrode. By controlling the setting direction of the liquid crystal signal electrode, the liquid crystal distribution in the sub-pixel area can compensate for each other, so that the difference in liquid crystal phase delay controlled by two adjacent liquid crystal signal electrodes (two adjacent in the row direction and column direction among the first signal electrode 31, the second signal electrode 32 and the third signal electrode 33) is reduced, and the transmittance of the liquid crystal is proportional to the square of the liquid crystal phase delay. The difference in liquid crystal phase delay is reduced, and thus the brightness difference in the area controlled by two adjacent liquid crystal signal electrodes (two adjacent in the row direction and column direction among the first signal electrode 31, the second signal electrode 32 and the third signal electrode 33) is also reduced. Therefore, the display panel is less likely to have display defects such as horizontal stripes in various viewing angles, thereby improving the brightness uniformity of the display panel.

[0097] In this embodiment, when the number of rows is greater than or equal to 3 and the number of columns is greater than or equal to 3, the extension directions of the liquid crystal signal electrodes of several sub-pixels intersect in the diagonal direction of the array.

[0098] In this embodiment, Figure 8 The number of rows is 3 and the number of columns is 3, that is, in the diagonal direction of the 3×3 array, the extension direction L1 of the first signal electrode 31, the extension direction L2 of the second signal electrode 32, and the extension direction L3 of the third signal electrode 33 intersect.

[0099] In this embodiment, in the row direction X, the angles between several liquid crystal signal electrodes and the column direction Y are different; in the column direction Y, the angles between several liquid crystal signal electrodes and the column direction Y are different; in the diagonal direction of the array, the angles between the liquid crystal signal electrodes of several sub-pixels and the column direction Y are different.

[0100] In this embodiment, Figure 8 In the row direction X, the angles between the extension direction L1 of the first signal electrode 31, the extension direction L2 of the second signal electrode 32, and the extension direction L3 of the third signal electrode 33 and the column direction Y are different, that is, the first angle α1, the second angle α2, and the third angle α3 are different from each other; in the column direction Y, the angles between the extension direction L1 of the first signal electrode 31, the extension direction L2 of the second signal electrode 32, and the extension direction L3 of the third signal electrode 33 and the column direction Y are different, that is, the first angle α1, the second angle α2, and the third angle α3 are different from each other; in the diagonal direction of the 3×3 array, the angles between the extension direction L1 of the first signal electrode 31, the extension direction L2 of the second signal electrode 32, and the extension direction L3 of the third signal electrode 33 and the column direction Y are different, that is, the first angle α1, the second angle α2, and the third angle α3 are different from each other. Therefore, by controlling the setting direction of the liquid crystal signal electrodes, the liquid crystal distribution in the sub-pixel area can compensate each other, and the brightness difference of the display panel in each viewing angle direction is basically consistent, the difference is reduced, and the viewing angle is more uniform.

[0101] Accordingly, the embodiment of the present invention further provides a pixel array, please refer to Figure 12 , Figure 12 is a schematic diagram of the arrangement of a pixel array in another embodiment of the present invention, the pixel array includes: Figures 8 to 11 The pixel units 3 are arranged in an array of rows and columns.

[0102] In this embodiment, the array of rows and columns includes an M×N array, where M is a natural number greater than or equal to 1, and N is a natural number greater than or equal to 1. The values of M and N may be the same or different, and the values of M and N are specifically designed according to the area of the display panel.

[0103] Figure 14 FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention.

[0104] Please refer to Figure 14 , the display panel includes Figure 7 or Figure 12 The pixel array and display panel include:

[0105] A color filter substrate 40, wherein the color filter substrate 40 includes a plurality of pixel unit regions, each pixel unit region includes a plurality of sub-pixel regions, and the plurality of sub-pixel regions are arranged in an array of rows and columns;

[0106] A TFT array substrate 50 is provided with a plurality of liquid crystal signal electrodes, each corresponding to each of the sub-pixel regions. In the row direction and the column direction, the extension directions of two adjacent liquid crystal signal electrodes intersect, and at least two adjacent liquid crystal signal electrodes have different angles with the column direction.

[0107] A liquid crystal layer 60 is located between the color filter substrate 40 and the TFT array substrate 50 .

[0108] In this embodiment, Figures 4 to 6 The pixel unit 2 described, or Figures 8 to 11 The pixel unit 3 described corresponds to the pixel unit area of the color filter substrate 40. Figures 4 to 6 The sub-pixel 20 described, or Figures 8 to 11 The depicted sub-pixel 30 corresponds to a sub-pixel region of the color filter substrate 40 .

[0109] In this embodiment, the color filter substrate 40 includes: a first substrate 41; a filter structure 42 located on the first substrate 41, wherein the filter structure 42 includes a plurality of filter layers regularly arranged on the surface of the first substrate 41, the plurality of filter layers including a red filter layer, a blue filter layer, and a green filter layer. Adjacent filter layers are of different types, and each filter layer corresponds to a sub-pixel area; a protective layer 43 located on the color filter structure 42; and a light-shielding layer 44 located between adjacent filter layers.

[0110] In this embodiment, the material of the red filter layer includes an organic material, and the red filter layer is used to transmit red light; the material of the blue filter layer includes an organic material, and the blue filter layer is used to transmit blue light; the material of the green filter layer includes an organic material, and the green filter layer is used to transmit green light.

[0111] In this embodiment, the light shielding layer 44 is used to block light to prevent light crosstalk from adjacent filter layers. The material of the light shielding layer 44 includes organic material, and the low transmittance of the light shielding layer 44 needs to meet preset requirements to prevent light from passing through.

[0112] In this embodiment, the material of the first substrate 41 includes an inorganic material, and the transmittance of the inorganic material meets preset requirements so as to transmit light as much as possible and reduce light loss. The material of the first substrate 41 includes glass and the like.

[0113] In this embodiment, the protective layer 43 is used to protect the surface of the filter structure 42. The material of the protective layer 43 includes an organic material. The material transmittance of the protective layer 43 needs to meet preset requirements so as to transmit light as much as possible and reduce light loss.

[0114] In this embodiment, the TFT array substrate 50 includes: a second substrate 51; a first insulating layer 52 located on the second substrate 51; a common electrode 53 located on the first insulating layer 52; a second insulating layer 54 located on the common electrode 53; and a plurality of discrete pixel electrodes 55 located on the second insulating layer 54.

[0115] In this embodiment, the liquid crystal layer 60 is located between the color filter substrate 40 and the TFT array substrate 50 , that is, the liquid crystal layer 60 is located between the protection layer 43 and the pixel electrode 55 .

[0116] In this embodiment, the pixel electrode 55 is located between the color filter substrate 40 and the common electrode 53. Figures 4 to 6 The liquid crystal signal electrode described, or Figures 8 to 11 The liquid crystal signal electrode described is the pixel electrode 55 . Each pixel electrode 55 corresponds to a sub-pixel region. The rotation angle of the liquid crystal molecules in each sub-pixel region is controlled by the pixel electrode 55 to adjust the transmittance of light in the corresponding sub-pixel region.

[0117] The 127-grayscale image is often used when testing display panels. Display defects are most likely to be seen at 127 grayscale. If the display panel performs well at 127 grayscale, then other display conditions will also be good. By applying different voltages to the display panel, the rotation angle of the liquid crystal molecules within each sub-pixel area is adjusted, thereby controlling the degree of light transmission within each sub-pixel area and achieving different display images.

[0118] In this embodiment, a 127 grayscale voltage is applied to make the display panel display a gray image. At this time, the distribution directions of the liquid crystal molecules in each sub-pixel area can be complementary, so that the liquid crystal distributions in the sub-pixel area can compensate for each other by controlling the setting direction of the liquid crystal signal electrode. As a result, the brightness difference of the display panel in each viewing angle direction is basically consistent, the difference is reduced, the viewing angle is more uniform, and the display panel is less likely to have display defects such as horizontal stripes.

[0119] Figure 15 FIG. 1 is a schematic structural diagram of a display panel in another embodiment of the present invention.

[0120] Please refer to Figure 15 , Figure 15 The structure of the display panel Figure 14The difference in the display panel structure is that the TFT array substrate 50 includes: a second substrate 51; a first insulating layer 52 located on the second substrate 51; a pixel electrode layer 73 located on the first insulating layer 52; a second insulating layer 54 located on the pixel electrode layer 73; and a plurality of common electrodes 75 located separately on the second insulating layer 54.

[0121] In this embodiment, the common electrode 75 is located between the color filter substrate 40 and the pixel electrode 73. Figures 4 to 6 The liquid crystal signal electrode described, or Figures 8 to 11 The liquid crystal signal electrode described is the pixel electrode 73 .

[0122] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A pixel unit, characterized in that: include: A plurality of sub-pixels are arranged in an array of rows and columns, and the sub-pixels include corresponding liquid crystal signal electrodes. In the row direction and the column direction, the extension directions of two adjacent liquid crystal signal electrodes intersect, and the angles between at least two adjacent liquid crystal signal electrodes and the column direction are different.

2. The pixel unit according to claim 1, wherein: The array of rows and columns includes: an N×N array, where the number of rows and columns is the same, and N is a natural number greater than or equal to 2.

3. The pixel unit according to claim 2, wherein: When the number of rows is 2 and the number of columns is 2, the extension directions of the liquid crystal signal electrodes of the two sub-pixels are parallel in the diagonal direction of the array.

4. The pixel unit according to claim 3, wherein: In the diagonal direction of the array, the angles between the two liquid crystal signal electrodes and the column direction are the same.

5. The pixel unit according to claim 2, wherein: When the number of rows is greater than or equal to 3 and the number of columns is greater than or equal to 3, the extension directions of the liquid crystal signal electrodes of several sub-pixels intersect in the diagonal direction of the array.

6. The pixel unit according to claim 5, wherein: In the row direction, the angles between several liquid crystal signal electrodes and the column direction are different; in the column direction, the angles between several liquid crystal signal electrodes and the column direction are different; in the diagonal direction of the array, the angles between the liquid crystal signal electrodes of several sub-pixels and the column direction are different.

7. The pixel unit according to claim 1, wherein: The liquid crystal signal electrode includes N electrically connected branch electrodes, and the extension directions of the N branch electrodes are parallel to each other, wherein N is a natural number greater than or equal to 2.

8. The pixel unit according to claim 7, wherein: The liquid crystal signal electrode further includes a connecting electrode, which is disposed at least at one end of the N branch electrodes in the extending direction, and is electrically connected to the N branch electrodes.

9. The pixel unit according to claim 1, wherein: The angle between the liquid crystal signal electrode and the column direction is in the range of 4° to 15°.

10. A pixel array, characterized in that: include: Several pixel units according to any one of claims 1 to 9 are distributed in an array of rows and columns.

11. The pixel array according to claim 10, wherein: The array of rows and columns includes: an M×N array, wherein M is a natural number greater than or equal to 1, and N is a natural number greater than or equal to 1.

12. A display panel comprising the pixel array according to claim 10, wherein: include: A color filter substrate, the color filter substrate comprising a plurality of pixel unit regions, the pixel unit region comprising a plurality of sub-pixel regions, the plurality of sub-pixel regions being arranged in an array of rows and columns; A TFT array substrate, wherein a plurality of liquid crystal signal electrodes are provided on the TFT array substrate, wherein the plurality of liquid crystal signal electrodes correspond one-to-one to the plurality of sub-pixel regions, wherein in the row direction and the column direction, the extension directions of two adjacent liquid crystal signal electrodes intersect, and at least two adjacent liquid crystal signal electrodes have different angles with the column direction; A liquid crystal layer is located between the color filter substrate and the TFT array substrate.

13. The display panel according to claim 12, wherein: Also includes: The pixel electrode and the common electrode are arranged on the TFT array substrate; when the pixel electrode is located between the color filter substrate and the common electrode, the liquid crystal signal electrode is the pixel electrode; when the common electrode is located between the color filter substrate and the pixel electrode, the liquid crystal signal electrode is the pixel electrode.

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