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CN-122002994-A - Display substrate and display device

CN122002994ACN 122002994 ACN122002994 ACN 122002994ACN-122002994-A

Abstract

The application provides a display substrate and a display device, and belongs to the technical field of display. The display substrate comprises a substrate, a plurality of light emitting units which are arranged on the substrate in an array manner, and a driving chip which is arranged on the substrate. The light-emitting unit comprises at least one light-emitting chip, and the driving chip is used for being electrically connected with the light-emitting chip. Each driving chip and the light emitting chip nearest to the driving chip meet the condition that L/D is more than or equal to tan (alpha/2). L is the distance between the driving chip and the light emitting chip closest to the driving chip, D is the distance between the surface of the driving chip far away from the substrate and the surface of the light emitting layer of the light emitting chip closest to the driving chip close to the substrate, and alpha is the light emitting angle of the light emitting chip closest to the driving chip. The application can ensure that the light-emitting chip has a larger light-emitting angle, thereby ensuring that the display substrate has a larger visual angle.

Inventors

  • LI HAIXU

Assignees

  • 京东方科技集团股份有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (11)

  1. 1. A display substrate, comprising: a substrate base plate (10); A plurality of light emitting units (200) located on the substrate base plate (10) and arranged in an array, wherein the light emitting units (200) comprise at least one light emitting chip (20); a driving chip (30) located on the substrate base plate (10), wherein the driving chip (30) is used for being electrically connected with the light-emitting chip (20); Wherein each driving chip (30) and the light emitting chip (20) closest to the driving chip (30) meet the requirement that L/D is greater than or equal to tan (alpha/2), L is the distance between the driving chip (30) and the light emitting chip (20) closest to the driving chip (30), D is the distance between the surface (30 a) of the driving chip (30) away from the substrate base plate (10) and the surface (201) of the light emitting layer (201) closest to the driving chip (30) close to the substrate base plate (10), and alpha is the light emitting angle of the light emitting chip (20) closest to the driving chip (30).
  2. 2. The display substrate of claim 1, wherein the display substrate comprises a transparent substrate, The display substrate further comprises a first bonding pad (401) and a second bonding pad (402) which are positioned on the substrate (10); The driving chip (30) comprises a first pin (301), and the first pin (301) is electrically connected with the first bonding pad (401); the light emitting chip (20) comprises a second pin (202), and the second pin (202) is electrically connected with the second bonding pad (402).
  3. 3. The display substrate according to claim 2, wherein, -The ratio of the dimension of the first pads (401) in a direction perpendicular to the substrate (10) to the dimension of the second pads (402) in a direction perpendicular to the substrate (10) is between 0.9-1.1; The ratio of the dimension of the first pins (301) in the direction perpendicular to the substrate (10) to the dimension of the second pins (202) in the direction perpendicular to the substrate (10) is between 0.9-1.1.
  4. 4. A display substrate according to any one of claim 1 to 3, wherein, The geometric centers of N.M light emitting units (200) connected with the same driving chip (30) are sequentially connected in a clockwise direction to form a first polygon (P1), the driving chip (30) connected with the N.M light emitting units (200) is positioned in the first polygon (P1), N and M are positive integers, the N.M light emitting units (200) are positioned in N rows and M columns, and/or, The region formed by a plurality of light emitting units (200) connected with the same driving chip (30) has a first outer contour (P2), and the geometric center of the driving chip (30) connected with the plurality of light emitting units (200) is positioned in the first outer contour (P2).
  5. 5. The display substrate according to claim 4, wherein, The geometric centers of the light emitting chips (20) in the same light emitting unit (200) are all positioned on a first straight line (L1), and a driving chip (30) for driving the light emitting unit (200) is positioned on one side of the first straight line (L1); or the geometric centers of the light emitting chips (20) in the same light emitting unit (200) are sequentially connected in a clockwise direction to form a second polygon (P3), and the geometric center of the driving chip (30) for driving the light emitting unit (200) is positioned outside the second polygon (P3).
  6. 6. The display substrate according to claims 1 to 5, wherein the at least one light emitting chip (20) in the light emitting unit (200) comprises a first color light emitting chip (20 a), a second color light emitting chip (20 b) and a third color light emitting chip (20 c).
  7. 7. The display substrate according to claim 6, wherein each of the light emitting units (200) comprises at least one of the first color light emitting chips (20 a), at least one of the second color light emitting chips (20 b), and at least one of the third color light emitting chips (20 c).
  8. 8. The display substrate according to any one of claims 6 or 7, wherein the light emitting chip (20) closest to the driving chip (30) is one of the first color light emitting chip (20 a), the second color light emitting chip (20 b), and the third color light emitting chip (20 c) having the lowest light emitting efficiency.
  9. 9. The display substrate according to any one of claims 1 to 8, wherein, The driving chips (30) with the light emitting chips (20) at two sides are target driving chips (30), the geometric center of each target driving chip (30) is positioned on a perpendicular bisector (L4) of a connecting line (L3) of the geometric centers of two light emitting chips (20) closest to the target driving chip (30) in the light emitting chips (20) at two sides of the target driving chip (30); Wherein two light emitting chips (20) which are positioned at two sides of the target driving chip (30) and are nearest to the target driving chip (30) belong to the same light emitting unit (200); Or two light emitting chips (20) which are positioned at both sides of the target driving chip (30) and are closest to the target driving chip (30) belong to different light emitting units (200).
  10. 10. A display substrate according to any one of claims 1 to 9, wherein the material of the driver chip (30) comprises silicon dioxide.
  11. 11. A display device comprising the display substrate according to any one of claims 1 to 10.

Description

Display substrate and display device Technical Field The present application relates to the field of display technologies, and in particular, to a display substrate and a display device. Background The display substrate generally comprises a substrate, a light emitting chip and a driving chip, wherein the light emitting chip and the driving chip are positioned on the substrate, the driving chip is electrically connected with the light emitting chip, and the driving chip is used for driving the light emitting chip to emit light. In general, local dimming (local dimming) techniques may be used to perform zone control on the display substrate to achieve a display effect with high contrast and high dynamic range (HIGH DYNAMIC RANGE, HDR). Specifically, the display area is divided into a plurality of sub-display areas, each sub-display area comprises a plurality of light emitting chips, a plurality of driving chips corresponding to the sub-display areas one by one are arranged, each driving chip is electrically connected with the light emitting chips in the corresponding sub-display area, and each driving chip drives the light emitting chips in the corresponding sub-display area to emit light so as to realize the partition control of the display substrate. However, it is difficult to ensure that the light emitting chip has a larger light emitting angle, resulting in a smaller viewing angle of the display substrate. Disclosure of Invention The application provides a display substrate and a display device, which can ensure that a light emitting chip has a larger light emitting angle and is beneficial to increasing the visual angle of the display substrate. The technical scheme of the application is as follows: in a first aspect, a display substrate is provided, the display substrate comprising: a substrate base; the light-emitting units are positioned on the substrate base plate and are arranged in an array manner, and each light-emitting unit comprises at least one light-emitting chip; The driving chip is positioned on the substrate base plate and is used for being electrically connected with the light-emitting chip; The light emitting chip comprises a substrate, a driving chip, a light emitting layer, a light emitting chip and a light emitting angle sensor, wherein each driving chip and the light emitting chip closest to the driving chip meet the requirement that L/D is more than or equal to tan (alpha/2), L is the distance between the driving chip and the light emitting chip closest to the driving chip, D is the distance between one surface of the driving chip, which is far away from the substrate, and one surface of the light emitting layer of the light emitting chip closest to the driving chip, which is close to the substrate, and alpha is the light emitting angle of the light emitting chip closest to the driving chip. Optionally, the display substrate further comprises a first bonding pad and a second bonding pad which are positioned on the substrate, the driving chip comprises a first pin which is electrically connected with the first bonding pad, and the light emitting chip comprises a second pin which is electrically connected with the second bonding pad. Optionally, the ratio of the dimension of the first bonding pad in the direction vertical to the substrate to the dimension of the second bonding pad in the direction vertical to the substrate is between 0.9 and 1.1, and the ratio of the dimension of the first pin in the direction vertical to the substrate to the dimension of the second pin in the direction vertical to the substrate is between 0.9 and 1.1. Optionally, the geometric centers of n×m light emitting units connected to the same driving chip are sequentially connected in a clockwise direction to form a first polygon, the driving chip connected to the n×m light emitting units is located in the first polygon, N and M are both positive integers, the n×m light emitting units are located in N rows and M columns, and/or, The region formed by the plurality of light emitting units connected with the same driving chip is provided with a first outer contour, and the geometric center of the driving chip connected with the plurality of light emitting units is positioned in the first outer contour. Optionally, the geometric centers of the light emitting chips in the same light emitting unit are all located on a first straight line, and the driving chip for driving the light emitting unit is located at one side of the first straight line, or the geometric centers of the light emitting chips in the same light emitting unit are sequentially connected along a clockwise direction to form a second polygon, and the geometric centers of the driving chips for driving the light emitting unit are located at the outer side of the second polygon. Optionally, the at least one light emitting chip in the light emitting unit includes a first color light emitting chip, a second color light emitting chip, and a third color li