Light-emitting diode chip, display substrate and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12389733-B2
Application number	US-202418733213-A
Country	US
Kind code	B2
Filing date	Jun 4, 2024
Priority date	Sep 29, 2020
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A light-emitting diode chip, a display substrate and a manufacturing method thereof are disclosed. The light-emitting diode chip includes a first conductive type semiconductor layer, a light-emitting layer, at least two second conductive type semiconductor layers, and at least two first electrodes; the at least two second conductive type semiconductor layers are at a side of the light-emitting layer away from the first conductive type semiconductor layer, the at least two first electrodes are electrically respectively connected with the at least two second conductive type semiconductor layers. Orthographic projections of the at least two second conductive type semiconductor layers on the first conductive type semiconductor layer are spaced apart from each other, and orthographic projections of the at least two first electrodes on the first conductive type semiconductor layer are spaced apart from each other.

First claim

What is claimed is:

1. A light-emitting diode chip, comprising:
a first conductive type semiconductor layer;
a light-emitting layer at a side of the first conductive type semiconductor layer;
at least two second conductive type semiconductor layers at a side of the light-emitting layer away from the first conductive type semiconductor layer; and
at least two first electrodes electrically respectively connected with the at least two second conductive type semiconductor layers,
wherein orthographic projections of the at least two second conductive type semiconductor layers on the first conductive type semiconductor layer are spaced apart from each other, and orthographic projections of the at least two first electrodes on the first conductive type semiconductor layer are spaced apart from each other,
a planar shape of the first conductive type semiconductor layer is an N-polygon, and the orthographic projections of the at least two first electrodes on the first conductive type semiconductor layer are respectively on perpendicular bisectors of at least two edges of the N-polygon or on corners of the N-polygon, and the at least two edges are uniformly distributed among all edges of the N-polygon,
an orthographic projection of a second electrode on the first conductive type semiconductor layer is at a center of the N-polygon, and N is a positive integer greater than or equal to 3.

2. The light-emitting diode chip according to claim 1 , further comprising:
the second electrode electrically connected to the first conductive type semiconductor layer,
wherein the second electrode, the first conductive type semiconductor layer, the light-emitting layer, the at least two second conductive type semiconductor layers and the at least two first electrodes constitute at least two light-emitting structures, and the at least two light-emitting structures share the first conductive type semiconductor layer.

3. The light-emitting diode chip according to claim 2 , wherein
the second electrode is at a side of the first conductive type semiconductor layer away from the light-emitting layer, and the at least two first electrodes are at a side of the at least two second conductive type semiconductor layers away from the light-emitting layer,
or, both the second electrode and the at least two first electrodes are at a side of the at least two second conductive type semiconductor layers away from the light-emitting layer.

4. The light-emitting diode chip according to claim 3 , wherein the orthographic projections of the at least two first electrodes on the first conductive type semiconductor layer surrounds the orthographic projection of the second electrode on the first conductive type semiconductor layer.

5. The light-emitting diode chip according to claim 1 , wherein the planar shape of the first conductive type semiconductor layer is any one selected from a group consisting of a triangle, a rectangle, a cross shape, a pentagon, a hexagon and an octagon.

6. The light-emitting diode chip according to claim 5 , wherein the planar shape of the first conductive type semiconductor layer is the triangle, and the at least two first electrodes comprise three first electrodes, orthographic projections of the three first electrodes on the first conductive type semiconductor layer are respectively at three corners of the triangle, and the orthographic projection of the second electrode on the first conductive type semiconductor layer is at a center of the triangle.

7. The light-emitting diode chip according to claim 5 , wherein the planar shape of the first conductive type semiconductor layer is the cross shape, the at least two first electrodes comprise four first electrodes, orthographic projections of the four first electrodes on the first conductive type semiconductor layer are respectively at four ends of the cross shape, and the orthographic projection of the second electrode on the first conductive type semiconductor layer is at a center of the cross shape.

8. The light-emitting diode chip according to claim 1 , wherein a size of the first conductive type semiconductor layer ranges from 3 mil to 5 mil, and a size of the orthographic projection of each of the first electrodes on the first conductive type semiconductor layer is less than 20 microns.

9. A display substrate, comprising:
a substrate; and
a plurality of first light-emitting diode chips on the substrate,
wherein each of the plurality of first light-emitting diode chips is the light-emitting diode chip according to claim 1 .

10. The display substrate according to claim 9 , further comprising:
a pixel circuit layer between the substrate and the plurality of first light-emitting diode chips,
wherein the pixel circuit layer comprises a plurality of pixel circuit units, each of the plurality of pixel circuit units comprises a signal output end,
in each of the plurality of first light-emitting diode chips, the at least two first electrodes are respectively connected with the signal output ends of different ones of the plurality of pixel circuit units,
or, in each of the plurality of first light-emitting diode chips, the at least two first electrodes are respectively connected with the signal output end of a same one of the plurality of pixel circuit units.

11. The display substrate according to claim 9 , wherein the plurality of first light-emitting diode chips comprise a first color light-emitting diode chip, a second color light-emitting diode chip, and a third color light-emitting diode chip,
the first color light-emitting diode chip is configured to emit light of a first color, the second color light-emitting diode chip is configured to emit light of a second color, and the third color light-emitting diode chip is configured to emit light of a third color.

12. The display substrate according to claim 9 , further comprising:
a plurality of second light-emitting diode chips on the substrate,
wherein each of the plurality of second light-emitting diode chips is configured to emit light of a first color, and the plurality of first light-emitting diode chips comprise a second color light-emitting diode chip and a third color light-emitting diode chip, the second color light-emitting diode chip is configured to emit light of a second color, and the third color light-emitting diode chip is configured to emit light of a third color, a yield of the second light-emitting diode chip is smaller than a yield of the second color light-emitting diode chip with a same size as the second light-emitting diode chip and smaller than a yield of the third color light-emitting diode chip with the same size as the second light-emitting diode chip.

13. The display substrate according to claim 9 , wherein the plurality of first light-emitting diode chips are arranged in an array along a first direction and a second direction on the substrate.

14. The display substrate according to claim 13 , wherein centers of first conductive type semiconductor layers of all first light-emitting diode chips arranged in the first direction are approximately on a same straight line.

15. The display substrate according to claim 13 , wherein extension directions of two adjacent edges respectively of two first conductive type semiconductor layers of two adjacent ones of the plurality of first light-emitting diode chips arranged in the first direction are substantially parallel, and a distance between the two adjacent ones of the plurality of first light-emitting diode chips arranged in the first direction is less than 75 microns.

16. The display substrate according to claim 13 , wherein center

Assignees

• Boe Mled Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Ma Junjie
• Sun Haiwei
• Lu Yuanda
• Yang Shanwei
• Qi Linxia
• Xiong Zhijun
• Zhao Jiawei

Classifications

• H10W90/00

  Package configurations · CPC title

• H10H20/0364

  of interconnections · CPC title

• H10H20/032

  of electrodes · CPC title

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• H10H20/01

  Manufacture or treatment · CPC title