# US 2021/0333633 A1 · Backlight module and display device

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- Number: US 2021/0333633 A1
- Document ID: US20210333633A1
- Status: Published application
- Kind: A1
- Application number: 16/495,214
- Filed: 2019-05-13
- Published: 2021-10-28
- Earliest claimed: 2019-03-27
- Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Inventors: Xindong MEI; Shaojun HOU; Chao WANG; Guanghui LIU
- Web page: https://patentgrep.com/patent/US20210333633A1

## CPC

- G02F 1/1336: {Illuminating devices}
- G02F 1/133603: {with LEDs}
- G02B 6/0011: {the light guides being planar or of plate-like form}
- G03B 15/02: Illuminating scene
- H04M 1/0264: {for a camera module assembly}
- H04N 23/56: provided with illuminating means
- G02F 1/13312: {Circuits comprising photodetectors for purposes other than feedback}
- G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side}
- H04M 1/0266: {for a display module assembly}
- 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
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A backlight module and a display device are provided, which include a camera area and a backlight area, wherein the backlight area surrounds the camera area, the camera area includes a transparent illumination area and a non-transparent illumination area, and the non-transparent illumination area surrounds the transparent illumination area; and the light board is disposed in the non-transparent illumination area and the at least one light bead is disposed on a light board. In the display mode, the camera area obtains a uniform light source, so as to realize the camera area of the display device which can be displayed normally in the displaying mode, and achieve a true 100% screen ratio. In a lighting mode of the camera module, the light source of the light bead is turned off to avoid affecting the collecting operation of the camera module.

## Claims

### Claim 1

A backlight module, comprising:
a camera area;
a backlight area, wherein the backlight area surrounds the camera area, the camera area comprises a transparent illumination area and a non-transparent illumination area, and the non-transparent illumination area surrounds the transparent illumination area;
a light board; and
at least one light bead, wherein the light board is disposed in the non-transparent illumination area and the at least one light bead is disposed on the light board.

### Claim 2 (depends on 1)

The backlight module according to claim 1, wherein the at least one light bead disposed on the light board is distributed in an array, and the at least one light bead is distributed around the transparent illumination area.

### Claim 3 (depends on 1)

The backlight module according to claim 1, wherein the at least one light bead is at least one mini light emitting diode (LED) light bead.

### Claim 4 (depends on 1)

The backlight module according to claim 1, wherein the camera area is a through hole, and the through hole penetrates through the backlight module.

### Claim 5 (depends on 1)

The backlight module according to claim 1, wherein the light board is a circular or square shape, and the transparent illumination area is a circular shape.

### Claim 6 (depends on 1)

The backlight module according to claim 1, wherein the backlight module is an edge-light type backlight module, or the backlight module is a direct-light type backlight module.

### Claim 7 (depends on 1)

A display device, comprising the backlight module according to claim 1;
wherein the display device further comprises a camera module and a display panel, the camera module is disposed in the through hole and corresponds to the camera area, and the display panel is disposed above the backlight module.

### Claim 8 (depends on 7)

The display device according to claim 7, wherein the display panel comprises a display area and a transparent area, the display area corresponds to the backlight area of the backlight module and the non-transparent illumination area, and the transparent area corresponds to the transparent illumination area of the camera area of the backlight module;
when the at least one light bead of the backlight module is turned on, the camera module is not in operation, the display area and the transparent area of the display panel normally display an image, and a full-screen display state is entered; and
when the camera module is in operation, the at least one light bead is turned off, and the display panel corresponding to the backlight area is normally displayed.

### Claim 9 (depends on 7)

The display device according to claim 7, wherein the display panel is a liquid crystal display panel, and the backlight area of the backlight module is configured to provide a light source for the display panel.

### Claim 10 (depends on 7)

The display device according to claim 7, wherein the display panel is an organic light-emitting diodes (OLED) display panel, and the backlight area of the backlight module is turned off.

### Claim 11 (depends on 7)

The display device according to claim 7, wherein the at least one light bead disposed on the light board is distributed in an array, and the at least one light bead is distributed around the transparent illumination area.

### Claim 12 (depends on 7)

The display device according to claim 7, wherein the at least one light bead is at least one mini light emitting diode (LED) light bead.

### Claim 13 (depends on 7)

The display device according to claim 7, wherein the camera area is a through hole, and the through hole penetrates through the backlight module.

### Claim 14 (depends on 7)

The display device according to claim 7, wherein the light board is a circular or square shape, and the transparent illumination area is a circular shape.

### Claim 15 (depends on 7)

The display device according to claim 7, wherein the backlight module is an edge-light type backlight module, or the backlight module is a direct-light type backlight module.