Array base plate and detecting method thereof, and light emitting apparatus

Patent metadata

Field	Value
Publication number	US-12315849-B2
Application number	US-202117793521-A
Country	US
Kind code	B2
Filing date	Sep 16, 2021
Priority date	Sep 16, 2021
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

The present application provides an array base plate and a detecting method thereof, and a light emitting apparatus, which relates to the technical field of displaying. The array base plate includes: a substrate, wherein the substrate includes a plurality of first light transmitting areas; and a first conductive layer located on the substrate; the first conductive layer includes a plurality of conductive-pad groups, and each of the conductive-pad groups includes at least one conductive pad; an overlapping area exists between an orthographic-projection area of the conductive pad on the substrate and one of the first light transmitting areas; and a transmittance of parts of the substrate that are located at the first light transmitting areas is greater than or equal to a first preset value.

First claim

The invention claimed is:

1. An array base plate, wherein the array base plate comprises:
a substrate, wherein the substrate comprises a plurality of first light transmitting areas; and
a first conductive layer located on the substrate;
the first conductive layer comprises a plurality of conductive-pad groups, and each of the conductive-pad groups comprises at least one conductive pad;
an overlapping area exists between an orthographic-projection area of the conductive pad on the substrate and one of the first light transmitting areas; and
a transmittance of parts of the substrate that are located at the first light transmitting areas is greater than or equal to a first preset value.

2. The array base plate according to claim 1 , wherein the first preset value is greater than or equal to 50%.

3. The array base plate according to claim 1 , wherein an area of the overlapping area occupies at least a half of an area of the orthographic-projection area of the conductive pad on the substrate.

4. The array base plate according to claim 3 , wherein an edge of the orthographic-projection area of the conductive pad on the substrate is located within the first light transmitting area.

5. The array base plate according to claim 2 , wherein a material of the parts of the substrate that are located at the first light transmitting areas comprises a light transmitting material, and/or, the parts of the substrate that are located at the first light transmitting areas are of a hollow structure.

6. The array base plate according to claim 1 , wherein at least two of the first light transmitting areas are communicated and form a second light transmitting area.

7. The array base plate according to claim 6 , wherein orthographic-projection areas of some of the conductive-pad groups on the substrate overlap with the second light transmitting area.

8. The array base plate according to claim 6 , wherein the substrate further comprises a plurality of third light transmitting areas;
the first conductive layer further comprises a plurality of traces, and the traces are electrically connected to the conductive pad; and
orthographic-projection areas of at least some of the traces on the substrate overlap with the third light transmitting areas.

9. The array base plate according to claim 8 , wherein some of the third light transmitting areas are in communication with some of the first light transmitting areas, and/or, some of the third light transmitting areas are in communication with some of the second light transmitting areas.

10. The array base plate according to claim 8 , wherein the substrate comprises a bottom layer and a second conductive layer located on the bottom layer, and the second conductive layer is insulated from the first conductive layer;
the second conductive layer comprises a plurality of driving lines that are arranged in a first direction and extend in a second direction; and
an orthographic projection of the third light transmitting area on the bottom layer is within an area between orthographic projections of two adjacent driving lines on the bottom layer.

11. The array base plate according to claim 10 , wherein at least some of the third light transmitting areas are arranged in the first direction, and extend in the second direction.

12. The array base plate according to claim 1 , wherein a distance from a contour of an orthographic projection of the light transmitting area on the first conductive layer to the conductive pad ranges 0-200 μm.

13. The array base plate according to claim 12 , wherein the array base plate further comprises a plurality of element devices, and each of the element devices is electrically connected to a same conductive-pad groups;
a plurality of the conductive-pad groups are arranged in an array, and each of the conductive pads comprises a metal layer and a connecting layer located on the metal layer;
the connecting layer is located between the metal layer and the element devices, and the metal layer is connected to the element devices by the connecting layer; and
the connecting layer comprises an intermetallic compound, and a morphology of the intermetallic compound is at least one of a block structure, a conchoid structure, a dendriform structure and a rice-granular structure.

14. The array base plate according to claim 13 , wherein the array base plate further comprises a soldering layer, the soldering layer is located between solder legs of each of the element devices and the conductive pad, and the soldering layer comprises a soldering material; and
when the soldering layer and the conductive pad directly contact, the morphology of the intermetallic compound is the rice-granular structure.

15. The array base plate according to claim 13 , wherein the array base plate further comprises a soldering layer, the soldering layer is located between solder legs of each of the element devices and the conductive pad, and the soldering layer comprises a soldering material; and
when an inhibiting layer is arranged between the soldering layer and the conductive pad, the morphology of the intermetallic compound is one or more of the block structure, the conchoid structure and the dendriform structure.

16. The array base plate according to claim 1 wherein the substrate comprises a bottom layer, and a buffer layer, a second conductive layer, a first insulating layer, a first planarization layer and a second insulating layer that are located on the bottom layer and are sequentially arranged in stack;
all of materials of the buffer layer, the first insulating layer, the first planarization layer and the second insulating layer are a light transmitting material; and
a material of parts of the second conductive layer that are located at the light transmitting areas is a light transmitting material, or, parts of the second conductive layer that are located at the light transmitting areas are of a hollow structure.

17. A light emitting apparatus, wherein the light emitting apparatus comprises the array base plate according to claim 1 .

18. A detecting method, wherein the detecting method is applied to detection on the array base plate according to claim 1 , the array base plate comprises a plurality of element devices, each of the element devices is electrically connected to the conductive pads in a same conductive-pad groups, and the method comprises:
collecting a target image at a back of the array base plate, wherein the back is a surface of the substrate that is away from the conductive pads; and
according to parameter information of the conductive pads in the target image, determining whether a connection imperfect exists between the element devices and the conductive pads.

19. The detecting method according to claim 18 , wherein the parameter information comprises an area of an orthographic projection of the connecting layer of the conductive pad on the substrate and an area of an orthographic projection of solder legs of the element devices on the substrate; and
according to the parameter information of the conductive pads in the target image, determining whether the connection imperfect exists between the element devices and the conductive pads comprises:
when the areas of the orthographic projections of the connecting layers of the conductive pads in the conductive-pad groups on the substrate are greater or equal to a second preset value compared with the areas of the orthographic projections of the soldering legs on the substrate, determining that connection between the element devices and the conductive

Assignees

• Hefei Boe Pixey Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Tang Hai
• Gao Liang
• Zhai Ming
• Qin Jianwei
• Che Xiaopan
• Ma Guanghe

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10W72/30

  Die-attach connectors · CPC title

• H10W72/013

  of die-attach connectors · CPC title

• H10H20/0364

  of interconnections · CPC title

• H10H20/857 Primary

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