Driving substrate, manufacturing process, and micro-LED array light-emitting backlight module

Patent metadata

Field	Value
Publication number	US-10512159-B2
Application number	US-201816300045-A
Country	US
Kind code	B2
Filing date	Sep 14, 2018
Priority date	Apr 24, 2018
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

The present disclosure relates to a driving substrate, a manufacturing method, and a micro-LED array substrate light-emitting backlight module. The driving substrate includes a first metal layer, a first high-reflection layer, and a second metal layer stacked in a top-down sequence. The driving substrate, the manufacturing method, and the micro-LED array light emitting backlight module of the present disclosure solve the loss of reflectivity issue caused by the edge forbidden area of the electrode welding pad edge forbidden region. At the same time, the limited reflectivity of traditional coated high-reflective layers (such as white oil) may also be enhanced.

First claim

What is claimed is:

1. A driving substrate, comprising:
a first metal layer, a first high-reflection layer, and a second metal layer stacked in a top-down sequence;
wherein the driving substrate further comprises a second high-reflection layer arranged above the second metal layer;
wherein the electrode welding pad of the driving substrate is exposed by the second high-reflection layer.

2. The driving substrate as claimed in claim 1 , wherein the driving substrate further comprises an insulation supporting layer arranged between the first metal layer and the first high-reflection layer.

3. The driving substrate as claimed in claim 2 , wherein the insulation supporting layer is a polyimide (PI) layer.

4. The driving substrate as claimed in claim 1 , wherein the first metal layer and the second metal layer respectively form a metal wire pattern.

5. The driving substrate as claimed in claim 1 , wherein the first high-reflection layer is made by high-reflection organic material or a high-reflection thin layer comprising multiple inorganic thin films.

6. The driving substrate as claimed in claim 1 , wherein the second high-reflection layer is a high high-reflection thin layer comprising high-reflection organic material.

7. A micro-LED array light-emitting backlight module, comprising:
a driving substrate, a micro-LED array, a fluorescent film, a diffusion sheet, and a brightness enhancing film being stacked sequentially from bottom to top, wherein the driving substrate is the driving substrate as claimed in claim 1 .

8. A manufacturing method of driving substrates, comprising:
forming a first metal layer;
forming an insulation supporting layer;
forming a first high-reflection layer;
forming a second high-reflection layer;
respectively etching the first metal layer and the second metal layer to form metal wire patterns;

forming a second high-reflection layer; and
removing the second high-reflection layer on a surface of a second electrode pad.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Zha Guowei

Classifications

• H05K1/09

  Use of materials for the {conductive, e.g. } metallic pattern · CPC title

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H05K2201/2054

  Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics · CPC title

• H05K2201/0154

  Polyimide · CPC title

• G02F1/133603

  with LEDs · CPC title