Backlight module and display panel

Patent metadata

Field	Value
Publication number	US-11221518-B2
Application number	US-202016957119-A
Country	US
Kind code	B2
Filing date	May 20, 2020
Priority date	May 20, 2020
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

The embodiments of the present application provided a backlight module and a display panel. By disposing a reflective layer on the substrate and disposing vias, whose areas gradually decrease from the side close to an electric current input side to the side away from the electric current input side, on the reflective layer, the backlight module reduces the brightness of a light emitting device layer close to the electric current input side and increase the brightness of the light emitting device layer away from the electric current input side. Thus the brightness of both sides of the light emitting devise layer is uniform, and thus the backlight uniformity of the backlight module is increased.

First claim

What is claimed is:

1. A backlight module, comprising:
a substrate on which a plurality of pads arranged in array are disposed;
a reflective layer disposed on the substrate, wherein vias which expose the pads are defined by the reflective layer;
a light emitting device layer disposed on the reflective layer, wherein the light emitting device layer comprises a plurality of light emitting devices electrically connected with the pads though the vias, and areas of the vias are in positive correlation with brightness of the light emitting devices; and
a package layer disposed on the light emitting device layer;
wherein the substrate comprises an electric current input side, and the areas of the vias close to the electric current input side are larger than the areas of the vias away from the electric current input side.

2. The backlight module as claimed in claim 1 , wherein the light emitting device is a blue light emitting diode.

3. The backlight module as claimed in claim 1 , wherein the substrate further comprises an optical film layer which is disposed on the package layer.

4. The backlight module as claimed in claim 3 , wherein the optical film layer comprises a quantum dot film, a prism sheet, a diffuser film and a brightness enhancement film which are sequentially stacked and disposed on the package layer.

5. The backlight module as claimed in claim 1 , wherein the package layer is made of transparent materials.

6. The backlight module as claimed in claim 1 , wherein the material of the reflective layer is white ink.

7. The backlight module as claimed in claim 1 , wherein the light emitting device comprises red light emitting diodes, green light emitting diodes and blue light emitting diodes, one of the red light emitting diodes, one of the green light emitting diodes and one of the blue light emitting diodes are arranged alongside with one another laterally or longitudinally forming a light emitting unit.

8. The backlight module as claimed in claim 7 , wherein a plurality of the light emitting units are arranged in array.

9. The backlight module as claimed in claim 1 , wherein a circuit board is disposed on the substrate, and the circuit board is used for driving the light emitting devices to emit light.

10. A display panel, comprising:
a substrate on which a plurality of pads arranged in array are disposed;
a reflective layer disposed on the substrate, vias which expose the pads are defined by the reflective layer;
a light emitting device layer disposed on the reflective layer, wherein the light emitting device layer comprises a plurality of light emitting devices electrically connected with the pads though the vias, and areas of the vias are in positive correlation with brightness of the light emitting devices; and
a package layer disposed on the light emitting device layer;
wherein the substrate comprises an electric current input side, and the areas of the vias close to the electric current input side are larger than the areas of the vias away from the electric current input side.

11. The display panel as claimed in claim 10 , wherein the light emitting device is a blue light emitting diode.

12. The display panel as claimed in claim 10 , wherein the substrate further comprises an optical film layer which is disposed on the package layer.

13. The display panel as claimed in claim 12 , wherein the optical film layer comprises a quantum dot film, a prism sheet, a diffuser film and a brightness enhancement film which are sequentially stacked and disposed on the package layer.

14. The display panel as claimed in claim 10 , wherein the package layer is made of transparent materials.

15. The display panel as claimed in claim 10 , wherein the material of the reflective layer is white ink.

16. The display panel as claimed in claim 10 , wherein the light emitting device comprises red light emitting diodes, green light emitting diodes and blue light emitting diodes, one of the red light emitting diodes, one of the green light emitting diodes and one of the blue light emitting diodes are arranged alongside with one another laterally or longitudinally forming a light emitting unit.

17. The display panel as claimed in claim 16 , wherein a plurality of the light emitting units are arranged in array.

18. The display panel as claimed in claim 10 , wherein a circuit board is disposed on the substrate, the circuit board is used for driving the light emitting devices to emit light.

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Fu Linlin
• Li Dehua
• Zhang Xin

Classifications

• G02F1/133612

  Electrical details · CPC title

• G02F1/133605

  including specially adapted reflectors · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title

• G02F1/133611 Primary

  including means for improving the brightness uniformity · CPC title

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title