Display panel and display device

Abstract

The display panel provided by the embodiment of the present disclosure comprises a substrate, a plurality of sub-pixels arranged in an array above the substrate, a plurality of data lines above the substrate, and a black matrix on a side of the data lines away from the substrate, wherein the orthographic projection of the black matrix on the substrate covers the data lines; along the row direction of the array, the plurality of data lines and the plurality of columns of sub-pixels are arranged alternately in sequence, and each data line is connected to a column of sub-pixels; along the column direction of the array, each sub-pixel is divided into at least two domains; at the domain boundary position between the two adjacent domains, the data line is bent to form a corner, with the bend being offset from the column direction of the array to the row direction of the array; wherein the spacing between the outer side edge of the orthographic projection of the black matrix covering the corner on the substrate and the outer side edge of the orthographic projection of the corner on the substrate is greater than the spacing between the edge of the orthographic projection of the black matrix covering other parts of the data line on the substrate and the edge of the orthographic projection of the data line covered by the black matrix on the substrate; and the outer side edge corresponds to the convex side edge of the corner.

Description

Technical Field

[0001] This disclosure pertains to the field of display technology, specifically relating to a display panel and a display device. Background Technology

[0002] Contrast ratio is one of the important indicators for measuring the performance of LCD products. Especially for high-contrast portable display products (such as handheld Pad panels), it is crucial to ensure high contrast ratio and prevent light leakage at 0 grayscale (L0). Summary of the Invention

[0003] This disclosure provides a display panel and a display device.

[0004] In a first aspect, embodiments of this disclosure provide a display panel, including a substrate;

[0005] Multiple sub-pixels are located above the substrate and arranged in an array;

[0006] Multiple data lines are located above the substrate;

[0007] A black matrix is ​​located on the side of the data line away from the substrate, and the orthographic projection of the black matrix onto the substrate covers the data line.

[0008] Along the row direction of the array, the multiple data lines and multiple columns of sub-pixels are arranged alternately in sequence, and each data line is connected to a column of sub-pixels.

[0009] Along the column direction of the array, each sub-pixel is divided into at least two domains;

[0010] At the domain boundary between two adjacent domains, the data line deviates from the column direction of the array and bends towards the row direction of the array to form a corner;

[0011] Wherein, the distance between the outer edge of the orthographic projection of the black matrix covering the corner onto the substrate and the outer edge of the orthographic projection of the corner onto the substrate is greater than the distance between the edge of the orthographic projection of the black matrix covering other parts of the data line onto the substrate and the orthographic projection of the edge of the data line it covers onto the substrate.

[0012] The outer edge corresponds to the protruding side edge of the corner.

[0013] In some embodiments, the orthographic projection width of the black matrix covering the corner on the substrate is greater than or equal to the orthographic projection width of the black matrix covering other parts of the data line on the substrate.

[0014] In some embodiments, the corner is located on the outer edge of the orthographic projection onto the substrate, and the distance between the straight line along the array column direction where the vertex of the corner is located and the straight line along the array column direction where the bend point forming the corner is located is in the range of 1-3 μm.

[0015] In some embodiments, the black matrix covering the corner forms the same shape as the corner;

[0016] The corner vertices of the black matrix and the corner vertices of the data line are located on the same straight line along the direction of the array rows;

[0017] The distance between the corner vertex of the black matrix and the corner vertex of the data line is 2-4 μm.

[0018] In some embodiments, the outer edge of the black matrix covering the corner, projected orthogonally onto the substrate, is parallel to the outer edge of the corner, projected orthogonally onto the substrate.

[0019] The distance between the outer edge of the black matrix covering the corner and the outer edge of the corner's projection onto the substrate ranges from 2 to 4 μm.

[0020] In some embodiments, the distance between the edge of the black matrix covering other parts of the data line projected onto the substrate and the corresponding projection of the edge of the data line it covers onto the substrate is in the range of 1-2 μm.

[0021] In some embodiments, the corner shapes of the black matrix and the data line are both triangles;

[0022] On the outer edge of the orthographic projection of the corner of the black matrix onto the substrate, the first bend start point and the first bend end point of the corner of the black matrix are located on the same straight line along the direction of the array column.

[0023] The corner of the data line is on the outer edge of the orthographic projection on the substrate, and the second bend start point and the second bend end point of the corner of the data line are located on the same straight line along the direction of the array column.

[0024] The difference between the distance between the first bend start point and the first bend end point and the distance between the second bend start point and the second bend end point is in the range of 3-5 μm.

[0025] In some embodiments, the corner is located on the outer edge of the orthographic projection onto the substrate, and the distance between the straight line along the array column direction where the vertex of the corner is located and the straight line along the array column direction where the bend point forming the corner is located is 0.

[0026] In some embodiments, the data lines corresponding to two adjacent domains of the sub-pixel are inclined towards the domain boundary position from the column direction of the array, and intersect at the domain boundary position to form the vertex of the data line;

[0027] The black matrix covering the data line has the same shape as the data line;

[0028] The vertices of the black matrix and the vertices of the data lines are located on the same straight line along the direction of the array rows;

[0029] The distance between the vertices of the black matrix and the vertices of the data line is 1-4 μm.

[0030] In some embodiments, the outer edge of the black matrix covering the data line projected onto the substrate is parallel to the outer edge of the data line projected onto the substrate.

[0031] The distance between the outer edge of the black matrix covering the data line as projected onto the substrate and the outer edge of the data line as projected onto the substrate ranges from 1 to 4 μm.

[0032] The outer edge corresponds to the side edge where the vertex of the data line is located.

[0033] In some embodiments, the data line portions corresponding to two adjacent domains of the sub-pixel outside the domain boundary position are tilted towards the domain boundary position, deviating from the column direction of the array.

[0034] In some embodiments, the sub-pixel includes a pixel electrode and a common electrode, one of which is located on the side of the data line closer to the substrate, and the other is located on the side of the data line away from the substrate and on the side of the black matrix closer to the substrate;

[0035] The pixel electrode and the common electrode overlap on the substrate by their orthogonal projections.

[0036] Of the pixel electrode and the common electrode, the one located on the side of the data line away from the substrate is a slit-shaped electrode.

[0037] The shape of the slit in the slit electrode is the same as the shape of the data line with the corner corresponding to the sub-pixel.

[0038] In some embodiments, an alignment film is also included, located on the side of the slit electrode opposite to the substrate and on the side of the black matrix close to the substrate; for initial alignment of the liquid crystal in the display panel.

[0039] In some embodiments, each sub-pixel is divided into two domains, and the opening areas of the sub-pixels in the two domains are the same.

[0040] Secondly, embodiments of this disclosure also provide a display device, which includes the aforementioned display panel. Attached Figure Description

[0041] The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0042] Figure 1 A top view of the sub-pixel design in a liquid crystal display product disclosed in the technology.

[0043] Figure 2 for Figure 1 This is a schematic diagram illustrating light leakage defects occurring at the protruding corner of the data cable in an LCD display product.

[0044] Figure 3 This is a schematic diagram of the sub-pixel arrangement structure in a display panel provided in an embodiment of this disclosure.

[0045] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle.

[0046] Figure 5 This is a schematic diagram of a sub-pixel in a display panel provided in an embodiment of this disclosure.

[0047] Figure 6 for Figure 5 Enlarged schematic diagram of part B.

[0048] Figure 7 For along Figure 3 The middle CC section line and along Figure 5 A structural cross-sectional view of the DD section line.

[0049] The attached figures are labeled as follows:

[0050] 1. Substrate; 2. Subpixel; 21. Pixel electrode; 22. Common electrode; 3. Data line; 30. Corner; 4. Black matrix; 5. Scan line; 6. Alignment film; 61. First alignment film; 62. Second alignment film; 101. Array substrate; 102. Pair cell substrate; 7. Insulating layer; 8. First planarization layer; 9. Second planarization layer; 10. Third planarization layer; 11. Second substrate. Detailed Implementation

[0051] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, a display panel and display device provided in the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0052] Embodiments of this disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth in this disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0053] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas, but are not intended to be limiting.

[0054] For LCD products with low transmittance requirements, to reduce 0-grayscale (L0) brightness and improve contrast, the black matrix is ​​widened to block areas where light leakage may occur. This solution can effectively prevent 0-grayscale light leakage, thereby improving the contrast of the LCD product. However, for products with high transmittance, in order to achieve a high aperture ratio, the width of the black matrix is ​​only 5.5μm. With limited control over the LCD cell alignment process, its width is insufficient to block the light leakage area, so 0-grayscale light leakage defects are common.

[0055] Reference Figure 1 This is a top view of the subpixel design in a liquid crystal display product disclosed in the technology. To improve the visual display effect of the high-transmittance portable liquid crystal display product, the subpixel 2 adopts a domain-segmentation design. For example, a subpixel 2 is divided into two domains along the column direction Y of the subpixel array. The data line 3 located between adjacent columns of subpixels 2 adopts a corner design that protrudes away from the column direction Y of the subpixel array at the domain boundary P position. Correspondingly, the black matrix 4 covering the data line 3 also adopts the same protruding corner design as the data line 3 at the domain boundary P position.

[0056] Reference Figure 1 The corner protrusion of data line 3 at the domain boundary P position is relatively large. For example, on the outer edge a' of the corner protrusion of data line 3, the distance s5' between the straight line along the sub-pixel array column direction Y where the vertex Z of the corner protrusion is located and the straight line along the sub-pixel array column direction Y where the bending point forming the corner protrusion is located is approximately 2-4 μm. This corner protrusion design of data line 3 at the domain boundary P position results in a large metal transition step difference in this area of ​​the liquid crystal display product (such as the array substrate where the data line is located). This will cause alignment anomalies in the liquid crystal alignment film prepared in subsequent processes at this large metal transition step difference, resulting in light leakage at the corner protrusion position of the data line. Figure 2 for Figure 1 This is a schematic diagram illustrating light leakage defects occurring at the corner protrusion of a data line in a liquid crystal display product. Furthermore, the distance s6' between the corner protrusion vertex O of the black matrix 4 and the corner protrusion vertex Z of the data line 3 ranges from 1 to 2 μm; the distance s6' between the outer edge a of the black matrix 4 covering the corner protrusion of the data line 3 and the outer edge a' of the corner protrusion of the data line 3 ranges from 1 to 2 μm; the distance s7' between the edge of the black matrix 4 covering other parts of the data line 3 and the corresponding edge of the data line 3 it covers ranges from 1 to 2 μm; a black... The first bend start point O1 and the first bend end point O2 of the corner protrusion of matrix 4 are located on the same straight line along the array column direction Y; on the outer edge a' of the corner protrusion of data line 3, the second bend start point Z1 and the second bend end point Z2 of the corner protrusion of data line 3 are located on the same straight line along the array column direction Y; the difference between the distance s8' between the first bend start point O1 and the first bend end point O2 and the distance s9' between the second bend start point Z1 and the second bend end point Z2 is in the range of 1-2μm.

[0057] The light leakage issue at the protruding corner of the data cable directly leads to excessive 0-grayscale (L0) brightness in LCD displays, significantly reducing the contrast ratio. To address this contrast reduction, the disclosed technology involves increasing the overall width of the black matrix to enhance its coverage of the data cable, ensuring the black matrix completely blocks the light leakage area at the protruding corner. However, this method sacrifices a significant amount of sub-pixel aperture ratio, which no longer meets the market's increasing demand for higher transmittance in display products. Therefore, further optimization and improvement of display product design are urgently needed to avoid light leakage at the protruding corner of the data cable while maintaining the sub-pixel aperture ratio.

[0058] To address the issue of light leakage at the corner protrusions of data lines in liquid crystal display products while ensuring the sub-pixel aperture ratio, this disclosure provides a display panel, referring to... Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the sub-pixel arrangement structure in a display panel provided in an embodiment of the present disclosure; Figure 4 for Figure 3A magnified schematic diagram of part A. The display panel includes a substrate; multiple sub-pixels 2 arranged in an array above the substrate; multiple data lines 3 located above the substrate; a black matrix 4 located on the side of the data lines 3 facing away from the substrate, with the orthographic projection of the black matrix 4 onto the substrate covering the data lines 3; along the row direction X of the array, the multiple data lines 3 and multiple columns of sub-pixels 2 are arranged alternately, with each data line 3 corresponding to a column of sub-pixels 2; along the column direction Y of the array, each sub-pixel 2 is divided into at least two domains; at the domain boundary P between two adjacent domains, the data lines 3 deviate from the column direction Y and bend towards the row direction X to form a corner 30; wherein, the distance s1 between the outer edge a of the orthographic projection of the black matrix 4 covering the corner 30 onto the substrate and the outer edge a' of the orthographic projection of the corner 30 onto the substrate is greater than the distance s2 between the edge of the orthographic projection of the black matrix 4 covering other parts of the data lines 3 and the orthographic projection of the corresponding edge of the data line 3 it covers onto the substrate; the outer edge corresponds to the protruding side edge of the corner 30.

[0059] The data line 3 has a uniform linewidth, such as 3-5 μm. By making the distance s1 between the outer edge a of the orthographic projection of the black matrix 4 covering the corner 30 onto the substrate and the outer edge a' of the orthographic projection of the corner 30 onto the substrate greater than the distance s2 between the edge of the orthographic projection of the black matrix 4 covering other parts of the data line 3 and the corresponding edge of the data line 3 it covers onto the substrate, on the one hand, the black matrix 4 can fully block the outer edge a' of the orthographic projection of the corner 30 onto the substrate, thereby avoiding light leakage at the corner 30 position caused by the abnormal alignment of the subsequent alignment film due to the transition step difference at the corner 30 position of the data line 3. On the other hand, it can achieve sufficient occlusion of the data line 3 other than the corner 30 by the black matrix 4, while the width of the black matrix 4 covering the other parts of the data line 3 other than the corner 30 does not need to be increased based on the disclosed technology. For example, the width of the black matrix 4 covering the other parts of the data line 3 other than the corner 30 can still maintain the current small width of 5.5μm to achieve a high aperture ratio. This ensures the aperture ratio of the sub-pixel 2 while avoiding light leakage at the corner 30 of the data line 3, thereby improving the contrast and transmittance of the display panel and thus improving the display effect of the display panel.

[0060] In some embodiments, the display panel further includes multiple scan lines 5, which extend along the row direction X of the array and are located one-to-one between adjacent rows of sub-pixels 2. Each scan line 5 connects to a row of sub-pixels 2 and provides a scan signal for the row of sub-pixels 2 it connects to. The multiple scan lines 5 spatially intersect with multiple data lines 3. Each data line 3 provides a data driving signal for a column of sub-pixels 2 it connects to. This enables the row-by-row scanning display of sub-pixels 2 in the display panel.

[0061] In this embodiment, dividing sub-pixel 2 into domains is beneficial to improving the visual effect of the display panel in a wider viewing angle range.

[0062] In some embodiments, the orthographic projection width s3 of the black matrix 4 covering the corner 30 on the substrate is greater than or equal to the orthographic projection width s4 of the black matrix 4 covering other parts of the data line 3 on the substrate. That is, in this embodiment, in order to achieve sufficient occlusion of the outer edge a' of the orthographic projection of the corner 30 of the data line 3 on the substrate by the black matrix 4, on the one hand, the width of the portion of the black matrix 4 covering the corner 30 can be increased, that is, the local width of the black matrix 4 can be increased; on the other hand, the local width of the black matrix 4 can be adjusted relative to the corner 30 without increasing the local width of the black matrix 4; thereby achieving that the outer edge a of the orthographic projection of the black matrix 4 covering the corner 30 on the substrate is equal to the outer edge a' of the orthographic projection of the corner 30 on the substrate. The spacing s1 between them is greater than the spacing s2 between the edge of the black matrix 4 covering other parts of the data line 3 projected onto the substrate and the edge of the corresponding data line 3 projected onto the substrate. This achieves sufficient occlusion of the outer edge a' of the corner 30 of the data line 3 projected onto the substrate by the black matrix 4, and also achieves sufficient occlusion of other parts of the data line 3 outside the corner 30 by the black matrix 4. Ultimately, while ensuring the aperture ratio of the sub-pixel 2, light leakage at the corner 30 of the data line 3 is avoided, thereby improving the contrast and transmittance of the display panel.

[0063] In some embodiments, the corner 30 is on the outer edge a' of the orthographic projection on the substrate, and the distance s5 between the straight line along the array column direction Y where the vertex Z of the corner 30 is located and the straight line along the array column direction Y where the bending point of the corner 30 is located is in the range of 1-3 μm.

[0064] In this embodiment, the corner 30 of the data line 3 is triangular in shape. The corner 30 is located on the outer edge a' of the orthographic projection onto the base. The second bend starting point Z1 and the second bend ending point Z2 of the corner 30 are located on the same straight line along the array column direction Y. The straight line along the array column direction Y where the bend point of the corner 30 is located is the straight line where the second bend starting point Z1 and the second bend ending point Z2 are located. In some embodiments, when the second bend starting point Z1 and the second bend ending point Z2 are not on the same straight line, the straight line along the array column direction Y where the bend point of the corner 30 is located is taken as the straight line along the array column direction Y where the second bend starting point Z1 or the second bend ending point Z2 is located, which is farther away from the straight line along the array column direction Y where the vertex Z of the corner 30 is located. The transition step at the corner 30 of data line 3 is determined by the distance between the straight line along the array column direction Y where the vertex Z of corner 30 is located and the straight line along the array column direction Y where the bend point of corner 30 is located, which is farther away from the vertex Z of corner 30.

[0065] In contrast to the publicly disclosed technology where the distance s5' between the straight line along the sub-pixel array column direction where the vertex of the corner protrusion is located and the straight line along the sub-pixel array column direction where the bending point of the corner protrusion is located is approximately 2-4 μm, in this embodiment, on the outer edge a' of the corner 30 projected onto the substrate, the distance s5' between the straight line along the array column direction Y where the vertex Z of the corner 30 is located and the straight line along the array column direction Y where the bending point of the corner 30 is located is significantly shortened. This means the transition step at the corner 30 of the data line 3 is significantly shortened, thereby... The width of the black matrix 4 covering the corner 30 is relatively increased locally. At the same time, without changing the width and position of the black matrix 4 covering the corner 30 compared with the disclosed technology, the distance s1 between the outer edge a of the black matrix 4 covering the corner 30 projected onto the substrate and the outer edge a' of the corner 30 projected onto the substrate can be relatively increased. This enables the black matrix 4 to fully block the outer edge a' of the corner 30 of the data line 3 projected onto the substrate, thereby avoiding poor light leakage at the corner 30 position caused by the subsequent alignment abnormality of the alignment film due to the transition step difference at the corner 30 position of the data line 3.

[0066] In some embodiments, the black matrix 4 covering the corner 30 forms the same shape as the corner 30; the corner vertex O of the black matrix 4 and the corner vertex Z of the data line 3 are located on the same straight line along the array row direction X; the distance s6 between the corner vertex O of the black matrix 4 and the corner vertex Z of the data line 3 ranges from 2 to 4 μm.

[0067] In this embodiment, compared to the publicly disclosed technology where the distance s6' between the corner protrusion O of the black matrix 4 and the corner protrusion Z of the data line 3 ranges from 1 to 2 μm, the distance s6' between the corner protrusion O of the black matrix 4 and the corner protrusion Z of the data line 3 is significantly increased. That is, based on the significantly shortened transition step at the corner 30 of the data line 3, the width of the black matrix 4 covering the corner 30 is increased locally in this embodiment. This further enables the black matrix 4 to fully block the outer edge a' of the orthographic projection of the corner 30 of the data line 3 onto the substrate, thereby further avoiding poor light leakage at the corner 30 caused by the subsequent alignment abnormality of the alignment film due to the transition step at the corner 30 of the data line 3.

[0068] In some embodiments, the outer edge a of the orthographic projection of the black matrix 4 covering the corner 30 onto the substrate and the outer edge a' of the orthographic projection of the corner 30 onto the substrate are parallel to each other; the distance s1 between the outer edge a of the orthographic projection of the black matrix 4 covering the corner 30 onto the substrate and the outer edge a' of the orthographic projection of the corner 30 onto the substrate ranges from 2 to 4 μm.

[0069] In contrast to the publicly disclosed technology where the distance s6' between the outer edge a of the black matrix 4 covering the corner protrusion of data line 3 projected onto the substrate and the outer edge a' of the corner protrusion of data line 3 projected onto the substrate ranges from 1 to 2 μm, in this embodiment, the distance s1 between the outer edge a of the black matrix 4 covering the corner 30 projected onto the substrate and the outer edge a' of the corner 30 projected onto the substrate is significantly increased. That is, based on the significantly shortened transition step at the corner 30 position of data line 3, the local width of the black matrix 4 covering the corner 30 in this embodiment is increased, thereby further achieving sufficient occlusion of the outer edge a' of the corner 30 projected onto the substrate by the black matrix 4, and further avoiding poor light leakage at the corner 30 position caused by the subsequent alignment abnormality of the alignment film due to the transition step at the corner 30 position of data line 3.

[0070] In some embodiments, the outer edge a of the black matrix 4 covering the corner 30 projected onto the substrate and the outer edge a' of the corner 30 projected onto the substrate may not be parallel; the spacing between the outer edge a of the black matrix 4 covering the corner 30 projected onto the substrate and the outer edge a' of the corner 30 projected onto the substrate may be different at different positions.

[0071] In some embodiments, the distance s2 between the edge of the black matrix 4 covering other parts of the data line 3 projected onto the substrate and the corresponding edge of the data line 3 it covers projected onto the substrate ranges from 1 to 2 μm.

[0072] In contrast to the publicly disclosed technology where the distance s7' between the edge of the black matrix 4 covering other parts of the data line 3 projected onto the substrate and the corresponding edge of the data line 3 it covers projected onto the substrate ranges from 1 to 2 μm, in this embodiment, the distance s2 between the edge of the black matrix 4 covering other parts of the data line 3 projected onto the substrate and the corresponding edge of the data line 3 it covers projected onto the substrate remains unchanged. This allows the black matrix 4 to fully block other parts of the data line 3 outside the corner 30 without changing the width of the black matrix 4 covering other parts of the data line 3 outside the corner 30. Consequently, the width of the black matrix 4 covering other parts of the data line 3 outside the corner 30 can still maintain a small width (e.g., 5.5 μm) to achieve a high aperture ratio. Ultimately, this ensures that the aperture ratio of the sub-pixel 2 does not change significantly, improving the transmittance of the display panel and thus enhancing its display effect.

[0073] In some embodiments, the corner shapes of the black matrix 4 and the data line 3 are both triangular; on the outer edge a of the corner of the black matrix 4 projected onto the substrate, the first bending start point O1 and the first bending end point O2 of the corner of the black matrix 4 are located on the same straight line along the array column direction Y; on the outer edge a' of the corner of the data line 30 projected onto the substrate, the second bending start point Z1 and the second bending end point Z2 of the corner of the data line 30 are located on the same straight line along the array column direction Y; the difference between the distance s7 between the first bending start point O1 and the first bending end point O2 and the distance s8 between the second bending start point Z1 and the second bending end point Z2 is in the range of 3-5 μm.

[0074] In this embodiment, compared to the publicly disclosed technology where the difference between the spacing s8' between the first bending start point O1 and the first bending end point O2 and the spacing s9' between the second bending start point Z1 and the second bending end point Z2 is in the range of 1-2 μm, the difference between the spacing s7 between the first bending start point O1 and the first bending end point O2 and the spacing s8 between the second bending start point Z1 and the second bending end point Z2 is significantly increased. This shortens the transition step at the corner 30 of the data line 3 while increasing the local width of the black matrix 4 covering the corner 30. This reduces the liquid crystal disorder area caused by the transition step at the corner 30 of the data line 3 at the domain boundary P, while increasing the coverage area of ​​the black matrix 4 around the corner 30 of the data line 3, thereby effectively reducing the light leakage area at the corner 30 of the data line 3.

[0075] In some embodiments, refer to Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of a sub-pixel in a display panel provided in an embodiment of this disclosure. Figure 6 for Figure 5 An enlarged schematic diagram of part B. The corner is located on the outer edge a' of the orthographic projection onto the substrate. The distance between the straight line along the array column direction Y where the vertex Z of the corner is located and the straight line along the array column direction Y where the bend point forming the corner is located is 0. In this embodiment, the corner of data line 3 at the domain boundary P is formed with a smooth transition design, that is, the corner design between two adjacent domains is eliminated, thereby completely eliminating the transition step difference of data line 3 at the domain boundary P. This avoids light leakage caused by the subsequent alignment abnormality of the alignment film due to the transition step difference of data line 3 at the domain boundary P, thus improving the contrast of the display panel.

[0076] In some embodiments, refer to Figure 6The data lines 3 corresponding to the two adjacent domains of sub-pixel 2 are tilted away from the column direction Y of the array towards the domain boundary P, and intersect at the domain boundary P to form the vertex Z of the data line 3; the black matrix 4 covering the data line 3 has the same shape as the data line 3; the vertex O of the black matrix 4 and the vertex Z of the data line 3 are located on the same straight line along the row direction X of the array; the distance s9 between the vertex O of the black matrix 4 and the vertex Z of the data line 3 ranges from 1 to 4 μm.

[0077] Among them, due to Figure 6 The design eliminates the data line corner design between adjacent domains, thus completely eliminating the transition step difference of data line 3 at the domain boundary P position. Therefore, a spacing of 1-4μm s9 is set between vertex O of black matrix 4 and vertex Z of data line 3 (i.e., with...). Figure 1 The spacing s6' or Figure 4 Both (the spacing s6 in the middle is the same) can avoid poor light leakage caused by the abnormal alignment of the subsequent alignment film due to the transition step difference of data line 3 at the domain boundary P position.

[0078] In some embodiments, refer to Figure 6 The outer edge a of the black matrix 4 covering data line 3 projected onto the substrate is parallel to the outer edge a' of the data line 3 projected onto the substrate; the distance s10 between the outer edge a of the black matrix 4 covering data line 3 projected onto the substrate and the outer edge a' of the data line 3 projected onto the substrate is in the range of 1-4μm, and the outer edge corresponds to the side edge where the vertex Z of data line 3 is located.

[0079] Among them, due to Figure 6 The design eliminates the data line corner design between adjacent domains, thus completely eliminating the transition step difference of data line 3 at the domain boundary P position. Therefore, a spacing of 1-4μm s10 is set between the outer edge a of the black matrix 4 covering data line 3 projected onto the substrate and the outer edge a' of the data line 3 projected onto the substrate (i.e., with...). Figure 1 The spacing s6' or Figure 4 Both (the spacing s2 in the middle is the same) can avoid poor light leakage caused by the abnormal alignment of the subsequent alignment film due to the transition step difference of the data line 3 at the domain boundary P position.

[0080] In some embodiments, the data lines 3 of the two adjacent domains of the corresponding sub-pixel 2 outside the domain boundary P position are tilted away from the column direction Y of the array toward the domain boundary P position. This helps to improve the visual effect of the display panel displayed over a wider viewing angle.

[0081] In some embodiments, refer to Figure 7 , Figure 7 For along Figure 3 The middle CC section line and along Figure 5A cross-sectional view of the DD section line. Sub-pixel 2 includes a pixel electrode 21 and a common electrode 22. One of the pixel electrode 21 and the common electrode 22 is located on the side of the data line 3 closest to the substrate 1, and the other is located on the side of the data line 3 away from the substrate 1, and is also located on the side of the black matrix 4 closest to the substrate 1. The orthographic projections of the pixel electrode 21 and the common electrode 22 onto the substrate 1 overlap. One of the pixel electrodes 21 and the common electrode 22 located on the side of the data line 3 away from the substrate 1 is a slit-shaped electrode. The shape of the slit in the slit-shaped electrode is the same as the shape of the data line 3 corresponding to the sub-pixel 2, which has a corner 30.

[0082] In this embodiment, the common electrode 22 is located on the side of the data line 3 closest to the substrate 1, and the pixel electrode 21 is located on the side of the data line 3 away from the substrate 1. The pixel electrode 21 is a slit-shaped electrode. That is, the display panel in this embodiment is an ADS type (Advanced Super Dimension Switch). The shape of the slit in the slit-shaped electrode is set to be the same as the shape of the data line 3 with corners 30 corresponding to the sub-pixel 2. This allows the slit-shaped electrode and the data line 3 with corners 30 to be mutually adapted, avoiding display defects (i.e., display MURA) when the display panel is pressed or touched. It also improves the visual effect of the display panel over a wider viewing angle.

[0083] In some embodiments, refer to Figure 7 The display panel also includes an alignment film 6, located on the side of the slit electrode away from the substrate 1 and on the side of the black matrix 4 close to the substrate 1; used to initially align the liquid crystal in the display panel.

[0084] The alignment film 6 includes a first alignment film 61 and a second alignment film 62. The display panel includes an array substrate 101 and a cell-mount substrate 102. The array substrate 101 includes, from bottom to top, a substrate 1, a common electrode 22, an insulating layer 7, a data line 3, a first planarization layer 8, a pixel electrode 21, a second planarization layer 9, and a first alignment film 61. The cell-mount substrate 102 includes, from bottom to top (i.e., the array substrate 101 side), a second alignment film 62, a third planarization layer 10, a black matrix 4, and a second substrate 11. Liquid crystal (not shown) is located in the cell-mount gap formed by the array substrate 101 and the cell-mount substrate 102.

[0085] In some embodiments, refer to Figure 3 and Figure 5 Each subpixel 2 is divided into two domains, and the opening areas of the two domains of subpixel 2 are the same. This further enhances the visual effect of the display panel over a wider viewing angle.

[0086] The display panel provided in this embodiment, by making the distance s1 between the outer edge a of the orthographic projection of the black matrix 4 covering the corner 30 onto the substrate and the outer edge a' of the orthographic projection of the corner 30 onto the substrate greater than the distance s2 between the edge of the orthographic projection of the black matrix 4 covering other parts of the data line 3 and the corresponding edge of the data line 3 onto the substrate, can achieve sufficient occlusion of the outer edge a' of the orthographic projection of the corner 30 onto the substrate by the black matrix 4, thereby avoiding the abnormal alignment of the subsequent alignment film caused by the transition step difference at the corner 30 of the data line 3. There is poor light leakage at the corner 30 position; on the other hand, the black matrix 4 can fully block the other parts of the data line 3 outside the corner 30, and the width of the black matrix 4 covering the other parts of the data line 3 outside the corner 30 does not need to be increased based on the disclosed technology. For example, the width of the black matrix 4 covering the other parts of the data line 3 outside the corner 30 can still maintain the current small width of 5.5μm to achieve a high aperture ratio. Thus, while ensuring the aperture ratio of the sub-pixel 2, light leakage at the corner 30 position of the data line 3 is avoided, thereby improving the contrast and transmittance of the display panel, and thus improving the display effect of the display panel.

[0087] This disclosure also provides a display device, including the display panel described in the above embodiments.

[0088] By using the display panel in the above embodiments, light leakage can be avoided in the display device, thereby improving the contrast and transmittance of the display device, and thus improving the display effect of the display device.

[0089] The display device can be any product or component with display function, such as an LCD panel, LCD TV, mobile phone, tablet computer, laptop computer, monitor, digital photo frame, or navigator.

[0090] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display panel, comprising a substrate; Multiple sub-pixels are located above the substrate and arranged in an array; Multiple data lines are located above the substrate; A black matrix is ​​located on the side of the data line away from the substrate, and the orthographic projection of the black matrix onto the substrate covers the data line. Along the row direction of the array, the multiple data lines and multiple columns of sub-pixels are arranged alternately in sequence, and each data line is connected to a column of sub-pixels. Along the column direction of the array, each sub-pixel is divided into at least two domains; At the domain boundary between two adjacent domains, the data line deviates from the column direction of the array and bends towards the row direction of the array to form a corner; Wherein, the distance between the outer edge of the orthographic projection of the black matrix covering the corner onto the substrate and the outer edge of the orthographic projection of the corner onto the substrate is greater than the distance between the edge of the orthographic projection of the black matrix covering other parts of the data line onto the substrate and the orthographic projection of the edge of the data line it covers onto the substrate. The outer edge corresponds to the protruding edge of the corner; The corner is located on the outer edge of the orthographic projection onto the base, and the distance between the straight line along the direction of the array column where the vertex of the corner is located and the straight line along the direction of the array column where the bend point forming the corner is located is in the range of 1-3 μm. The distance between the edge of the black matrix covering other parts of the data line projected onto the substrate and the corresponding projection of the edge of the data line it covers onto the substrate is in the range of 1-2 μm. The corner shapes of the black matrix and the data line are both triangles; On the outer edge of the orthographic projection of the corner of the black matrix onto the substrate, the first bend start point and the first bend end point of the corner of the black matrix are located on the same straight line along the direction of the array column. The corner of the data line is on the outer edge of the orthographic projection on the substrate, and the second bend start point and the second bend end point of the corner of the data line are located on the same straight line along the direction of the array column. The difference between the distance between the first bend start point and the first bend end point and the distance between the second bend start point and the second bend end point is in the range of 3-5 μm.

2. The display panel according to claim 1, wherein, The orthographic projection width of the black matrix covering the corner on the substrate is greater than or equal to the orthographic projection width of the black matrix covering other parts of the data line on the substrate.

3. The display panel according to claim 1 or 2, wherein, The black matrix covering the corner forms the same shape as the corner. The corner vertices of the black matrix and the corner vertices of the data line are located on the same straight line along the direction of the array rows; The distance between the corner vertex of the black matrix and the corner vertex of the data line is 2-4 μm.

4. The display panel according to claim 3, wherein, The outer edge of the black matrix covering the corner, projected onto the substrate, is parallel to the outer edge of the corner, projected onto the substrate. The distance between the outer edge of the black matrix covering the corner and the outer edge of the corner's projection onto the substrate ranges from 2 to 4 μm.

5. The display panel according to claim 1, wherein, The corner is located on the outer edge of the orthographic projection onto the base, and the distance between the straight line along the array column direction where the vertex of the corner is located and the straight line along the array column direction where the bend point forming the corner is located is 0.

6. The display panel according to claim 5, wherein, The data lines corresponding to two adjacent domains of the sub-pixel are deviated from the column direction of the array and tilted towards the domain boundary position, and intersect at the domain boundary position to form the vertex of the data line; The black matrix covering the data line has the same shape as the data line; The vertices of the black matrix and the vertices of the data lines are located on the same straight line along the direction of the array rows; The distance between the vertices of the black matrix and the vertices of the data line is 1-4 μm.

7. The display panel according to claim 6, wherein, The outer edge of the black matrix covering the data line, projected onto the substrate, is parallel to the outer edge of the data line, projected onto the substrate. The distance between the outer edge of the black matrix covering the data line as projected onto the substrate and the outer edge of the data line as projected onto the substrate ranges from 1 to 4 μm. The outer edge corresponds to the side edge where the vertex of the data line is located.

8. The display panel according to claim 1, 2 or 5, wherein, The data line portions of the sub-pixels adjacent to each other outside the domain boundary position deviate from the column direction of the array and tilt toward the domain boundary position.

9. The display panel according to claim 8, wherein, The sub-pixel includes a pixel electrode and a common electrode. One of the pixel electrode and the common electrode is located on the side of the data line closer to the substrate, and the other is located on the side of the data line away from the substrate, and is located on the side of the black matrix closer to the substrate. The pixel electrode and the common electrode overlap on the substrate by their orthogonal projections. Of the pixel electrode and the common electrode, the one located on the side of the data line away from the substrate is a slit-shaped electrode. The shape of the slit in the slit electrode is the same as the shape of the data line with the corner corresponding to the sub-pixel.

10. The display panel according to claim 9, wherein, It also includes an alignment film located on the side of the slit electrode facing away from the substrate and on the side of the black matrix close to the substrate; used to initially align the liquid crystal in the display panel.

11. The display panel according to claim 1, wherein, Each sub-pixel is divided into two domains, and the opening areas of the sub-pixels in the two domains are the same.

12. A display device, wherein, The display panel includes any one of claims 1-11.

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