# US 11,307,456 B2 · Backlight module and display device

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- Number: US 11,307,456 B2
- Document ID: US11307456B2
- Status: Granted
- Kind: B2
- Application number: 16/650,393
- Filed: 2020-03-13
- Published: 2021-12-23
- Granted: 2022-04-19
- Earliest claimed: 2020-02-04
- Applicants: Tcl China Star Optoelectronics Technology Co., Ltd.
- Inventors: Zhenxia Chen
- Web page: https://patentgrep.com/patent/US11307456B2

## CPC

- G02F 1/133605: {including specially adapted reflectors}
- G02F 1/133603: {with LEDs}
- G02F 1/133612: {Electrical details}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

The present disclosure provides a backlight module and a display device. The backlight module includes a substrate, mini LEDs, and at least one conductive reflective layer. The substrate includes a light-emitting area and a non-light-emitting area surrounding the light-emitting area. The mini LEDs are disposed in the light-emitting area of the substrate. The conductive reflective layer covers the whole non-light-emitting area, and the mini LEDs are electrically connected to one conductive reflective layer.

## Claims

### Claim 1

A backlight module, comprising:
a substrate comprising a light-emitting area and a non-light-emitting area surrounding the light-emitting area;
a plurality of mini light-emitting diodes (LEDs) disposed in the light-emitting area of the substrate; and
at least one conductive reflective layer covering whole non-light-emitting area, wherein the mini LEDs are electrically connected to the at least one conductive reflective layer;
wherein the at least one conductive reflective layer comprises:
a first conductive reflective layer disposed on the substrate;
a transparent insulating layer disposed on the first conductive reflective layer; and
a second conductive reflective layer disposed on the transparent insulating layer, wherein at least one open groove is defined in the second conductive reflective layer; and
the mini LEDs correspond to the at least one open groove and are electrically connected to the first conductive reflective layer.

### Claim 2 (depends on 1)

The backlight module according to claim 1, wherein the second conductive reflective layer comprises at least one of first reflective wirings and at least one of second reflective wirings in parallel with each other, widths of the second reflective wirings are less than widths of the first reflective wirings, a first gap is defined between the first reflective wirings, the second reflective wirings, or one of the first reflective wirings and one of the second reflective wirings, and the at least one open groove corresponds to the first reflective wirings and the first gap adjacent to the first reflective wirings.

### Claim 3 (depends on 2)

The backlight module according to claim 2, wherein the first conductive reflective layer comprises at least two third reflective wirings in parallel with each other, a second gap is defined between two of the at least two third reflective wirings adjacent to each other, and the second gap corresponds to one of the first reflective wirings, one of the second reflective wirings, or both of them.

### Claim 4 (depends on 1)

The backlight module according to claim 1, wherein the second conductive reflective layer comprises at least two first reflective wirings in parallel with each other, and each open groove corresponds to one of the at least two first reflective wirings.

### Claim 5 (depends on 4)

The backlight module according to claim 4, wherein the first conductive reflective layer comprises at least two second reflective wirings in parallel with each other, a first gap is defined between two of the at least two second reflective wirings adjacent to each other, and the first gap corresponds to one of the at least two first reflective wirings.

### Claim 6 (depends on 5)

The backlight module according to claim 5, wherein a second gap is defined between two of the at least two first reflective wirings adjacent to each other, and the second gap corresponds to one of the at least two second reflective wirings.

### Claim 7 (depends on 1)

A display device, comprising the backlight module according to claim 1.

### Claim 8

A backlight module, comprising:
a substrate comprising a light-emitting area and a non-light-emitting area surrounding the light-emitting area;
a plurality of mini light-emitting diodes (LEDs) disposed in the light-emitting area of the substrate; and
at least one conductive reflective layer covering whole non-light-emitting area, wherein the mini LEDs are electrically connected to the at least one conductive reflective layer;
wherein the at least one conductive reflective layer comprises:
a first conductive reflective layer disposed on the substrate;
a transparent insulating layer disposed on the first conductive reflective layer; and
a second conductive reflective layer disposed on the transparent insulating layer;
wherein the mini LEDs are electrically connected to the first conductive reflective layer and/or the second conductive reflective layer; and
wherein the first conductive reflective layer comprises at least two first reflective wirings in parallel with each other, a first gap is defined between two of the at least two first reflective wirings adjacent to each other, the second conductive reflective layer comprises at least two second reflective wirings in parallel with each other, and the first gap corresponds to one of the second reflective wirings.

### Claim 9 (depends on 8)

The backlight module according to claim 8, wherein a second gap is defined between two of the at least two second reflective wirings adjacent to each other, and the second gap corresponds to one of the at least two first reflective wirings.