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CN-115867085-B - Display substrate, display panel and display device

CN115867085BCN 115867085 BCN115867085 BCN 115867085BCN-115867085-B

Abstract

The invention discloses a display substrate, a display panel and a display device, wherein the display substrate comprises a substrate and a color film structure layer arranged on one side of the substrate, the color film structure layer comprises color filters which are arranged in rows and columns, the color filters are sequentially and closely arranged in the row direction, the color film structure layer is provided with a plurality of undercut structures in the row direction, the undercut structures are formed on the adjacent parts of the side walls of every two adjacent color filters, the undercut structures comprise first arc-shaped parts protruding towards the direction close to the substrate and second arc-shaped parts protruding towards the direction away from the substrate, the first arc-shaped parts are closer to the substrate than the second arc-shaped parts, the first arc-shaped parts and the second arc-shaped parts are connected in the direction perpendicular to the substrate, and the gradient angle of the first arc-shaped parts is larger than that of the second arc-shaped parts. Under the condition of ensuring cross color separation between adjacent pixels, the light-emitting area of the pure-color light path can be increased to the greatest extent, so that the color cast visual angle is maximized, the color cast caused by the visual angle is improved, and the display effect is improved.

Inventors

  • YANG ZONGSHUN
  • ZHANG DACHENG

Assignees

  • 京东方科技集团股份有限公司
  • 云南创视界光电科技有限公司

Dates

Publication Date
20260505
Application Date
20221226

Claims (11)

  1. 1. The display substrate is characterized by comprising a substrate and a color film structure layer arranged on one side of the substrate, wherein the color film structure layer comprises color filters which are arranged in rows and columns, and the color filters are sequentially and adjacently arranged in the row direction; The color film structure layer is provided with a plurality of undercut structures in the row direction, the undercut structures are formed at the position, close to the side walls of each two adjacent color filters, of the color film structure layer, each undercut structure comprises a first arc-shaped part protruding towards the direction close to the substrate and a second arc-shaped part protruding towards the direction away from the substrate, the first arc-shaped part is closer to the substrate than the second arc-shaped part, the first arc-shaped part and the second arc-shaped part are connected in the direction perpendicular to the substrate, and the gradient angle of the first arc-shaped part is larger than that of the second arc-shaped part; The undercut structure comprises a convex side wall positioned on one color filter and a concave side wall positioned on the other color filter between every two adjacent color filters, and the convex side wall and the concave side wall are matched and attached in the row direction; The color filter with the concave side walls is also provided with convex structures, the convex structures are in one-to-one correspondence with the concave side walls, the corresponding convex structures are connected with the concave side walls in the direction perpendicular to the substrate, the convex structures comprise a third arc-shaped part and a fourth arc-shaped part which are connected in the row direction, the third arc-shaped part is connected with the concave side walls corresponding to the convex structures, and the gradient angle of the third arc-shaped part is larger than that of the fourth arc-shaped part.
  2. 2. The display substrate of claim 1, wherein a length of the first arcuate portion is greater than a length of the second arcuate portion.
  3. 3. The display substrate according to claim 1 or 2, wherein the slope angle of the first arc-shaped portion is 60 ° to 85 °.
  4. 4. The display substrate according to claim 1, wherein the color filters in the rows and columns include a first filter, a second filter, and a third filter having different colors from each other, the first filter having the convex side wall, the second filter having the concave side wall, the third filter having the convex side wall and the concave side wall; The substrate base plate is provided with a plurality of pixel areas, and each pixel area is provided with one first optical filter, one second optical filter and one third optical filter; In the row direction and in each of the pixel regions, the third filter is located between the first filter and the second filter; in the row direction, the colors of each adjacent two of the color filters are different.
  5. 5. The display substrate of claim 4, wherein a length of the second arcuate portion is greater than a length of the third arcuate portion.
  6. 6. The display substrate according to claim 4, wherein the orthographic projection of the convex structure connected to the concave side wall on the substrate covers the orthographic projection of the convex side wall corresponding to the concave side wall on the substrate, and the overlapping part between two adjacent color filters forms a black matrix, wherein the black matrix corresponds to the convex structure one by one, and the black matrix corresponds to the undercut structure one by one; The orthographic projection of the convex structure on the substrate covers the orthographic projection of the black matrix on the substrate, and the orthographic projection of the black matrix on the substrate covers the orthographic projection of the undercut structure on the substrate.
  7. 7. The display substrate of claim 6, further comprising a light emitting structure layer on a side of the color film structure layer proximate to the substrate, the light emitting structure layer comprising an anode layer, a pixel defining layer, a light emitting layer, and a cathode layer; the orthographic projection of the convex structure on the substrate falls into the orthographic projection of the pixel defining layer on the substrate, and the orthographic projection of the black matrix on the substrate falls into the orthographic projection of the pixel defining layer on the substrate.
  8. 8. The display substrate according to claim 6 or 7, wherein a width of an orthographic projection of the undercut structure on the substrate in the row direction is inversely related to a magnitude of a slope angle of the first arc portion.
  9. 9. The display substrate according to claim 6 or 7, wherein a width of the black matrix in the row direction is 100nm to 300nm.
  10. 10. A display panel comprising a display substrate according to any one of claims 1-9.
  11. 11. A display device comprising the display panel according to claim 10.

Description

Display substrate, display panel and display device Technical Field The invention relates to the technical field of display, in particular to a display substrate, a display panel and a display device. Background One technical route for micro-display is white light device + Color Filter (CF) to realize full color. The micro display has ultra-high PPI, the pixels are extremely tiny (d: 3-8 um), cross color of products is easy to occur, shading BM is usually used for blocking serial light among pixels in the traditional display field, and the micro display mostly adopts pixel overlapping at present, and the overlapping area is opaque to realize shading effect. The overlapping structure is usually represented by drilling (Undercut) angles on the left side and the right side of the color filter, so that the color filter forms a certain overlapping area at the Undercut position, and the overlapping area forms a shading area with a certain width, so that color cross color among pixels is avoided, and the color gamut is improved. At present Undercut has a slow angle, namely a large overlapping area, a wider shading area can be formed, but the problem of impure picture can occur after the light path passes through two color filters under a wide range of color cast angles. Disclosure of Invention In view of the foregoing drawbacks or shortcomings of the prior art, it is desirable to provide a display substrate, a display panel, and a display device. In a first aspect, an embodiment of the present invention provides a display substrate, including a substrate and a color film structure layer disposed on one side of the substrate, where the color film structure layer includes color filters arranged in rows and columns, and the color filters are sequentially disposed next to each other in a row direction; the color film structure layer is provided with a plurality of undercut structures in the row direction, the undercut structures are formed on the adjacent side walls of every two adjacent color filters, each undercut structure comprises a first arc-shaped part protruding towards the direction close to the substrate and a second arc-shaped part protruding towards the direction away from the substrate, the first arc-shaped part is closer to the substrate than the second arc-shaped part, the first arc-shaped part and the second arc-shaped part are connected in the direction perpendicular to the substrate, and the gradient angle of the first arc-shaped part is larger than that of the second arc-shaped part. In some examples, the length of the first arcuate portion is greater than the length of the second arcuate portion. In some examples, the slope angle of the first arcuate portion is 60 ° to 85 °. In some examples, the undercut structure includes, between each two adjacent color filters, a raised sidewall on one of the color filters and a recessed sidewall on the other color filter, the raised sidewall and the recessed sidewall fitting in the row direction. In some examples, the color filters in the rows and columns include a first filter, a second filter, and a third filter that are different in color from each other, the first filter having the convex sidewall, the second filter having the concave sidewall, the third filter having the convex sidewall and the concave sidewall; The substrate base plate is provided with a plurality of pixel areas, and each pixel area is provided with one first optical filter, one second optical filter and one third optical filter; In the row direction and in each of the pixel regions, the third filter is located between the first filter and the second filter; in the row direction, the colors of each adjacent two of the color filters are different. In some examples, the color filter having the concave side walls further has convex structures, the convex structures are in one-to-one correspondence with the concave side walls, and the corresponding convex structures are connected with the concave side walls in a direction perpendicular to the substrate; The convex structure comprises a third arc-shaped part and a fourth arc-shaped part which are connected in the row direction, the third arc-shaped part is connected with the concave side wall corresponding to the convex structure, and the gradient angle of the third arc-shaped part is larger than that of the fourth arc-shaped part. In some examples, the length of the second arcuate portion is greater than the length of the third arcuate portion. In some examples, the orthographic projection of the convex structure connected with the concave side wall on the substrate covers the orthographic projection of the convex side wall corresponding to the concave side wall on the substrate, and the overlapped part between two adjacent color filters forms a black matrix, wherein the black matrix is in one-to-one correspondence with the convex structure, and the black matrix is in one-to-one correspondence with the undercut structure; The orthographic pr