# US 2021/0278725 A1 · Display module

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- Number: US 2021/0278725 A1
- Document ID: US20210278725A1
- Status: Published application
- Kind: A1
- Application number: 16/620,541
- Filed: 2019-09-27
- Published: 2021-09-09
- Earliest claimed: 2019-05-30
- Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Inventors: Shiyuan Xiao
- Web page: https://patentgrep.com/patent/US20210278725A1

## CPC

- G02F 1/133608: {including particular frames or supporting means}
- G02F 1/133311: {Environmental protection, e.g. against dust or humidity}
- G02F 1/133514: {Colour filters}
- G02F 1/133531: {characterised by the arrangement of polariser or analyser axes}
- G02F 1/133605: {including specially adapted reflectors}
- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- G02F 1/1339: Gaskets; Spacers; Sealing of cells
- G02F 1/133314: {Back frames}
- G02F 1/133331: {Cover glasses}
- G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side}
- 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

A display module is provided, which provides a first sealing structure disposed between a flexible circuit board and a surface of a cover plate facing a backlight housing and a second sealing structure disposed between the flexible circuit board and a surface of a side wall of the backlight housing facing the cover plate. It can isolate the external water vapor and dust from entering the interior of the display module, thereby improving the dustproof and waterproof capabilities of the display module, and further improving the reliability of the display module.

## Claims

### Claim 1

A display module, comprising:
a backlight housing comprising a bottom wall and a side wall, the bottom wall and the side wall enclosed as an accommodation space;
a backlight module received in the accommodation space;
a bracket disposed in the backlight housing and disposed at a side of the backlight module;
a display panel disposed on the bracket;
a cover plate disposed on the display panel, wherein a gap is provided between a surface of the cover plate facing the backlight housing and a surface of the side wall of the backlight housing facing the cover plate;
a flexible circuit board electrically connected to the display panel through the gap;
a first sealing structure disposed between the flexible circuit board and the surface of the cover plate facing the backlight housing; and
a second sealing structure disposed between the flexible circuit board and the surface of the side wall of the backlight housing facing the cover plate.

### Claim 2 (depends on 1)

The display module of claim 1, wherein a side of the first sealing structure close to the flexible circuit board and a side of the first sealing structure close to the surface of the cover plate facing the backlight housing are sticky.

### Claim 3 (depends on 1)

The display module of claim 1, wherein a side of the second sealing structure close to the flexible circuit board and a side of the second sealing structure close to the surface of the side wall of the backlight housing facing the cover plate are sticky.

### Claim 4 (depends on 1)

The display module of claim 1, wherein the bracket comprises a first support portion and a second support portion, the first support portion is inserted into the accommodation space and abuts against to the bottom wall, and the second support portion is disposed on a side of the first support portion away from the bottom wall and extends toward the display panel.

### Claim 5 (depends on 4)

The display module of claim 4, wherein the first support portion is disposed in parallel with the side wall of the backlight housing.

### Claim 6 (depends on 4)

The display module according to claim 4, wherein the first support portion and the second support portion are disposed perpendicular to each other.

### Claim 7 (depends on 4)

The display module of claim 4, further comprising a fixing tape disposed between the second support portion and the display panel.

### Claim 8 (depends on 7)

The display module of claim 7, wherein the display panel comprises a lower polarizer, a thin film transistor substrate, a liquid crystal layer, a color filter substrate, and an upper polarizer sequentially stacked from bottom to top, and the flexible circuit board is electrically connected to the thin film transistor substrate.

### Claim 9 (depends on 7)

The display module according to claim 7, wherein the second sealing structure is stretchable, a thickness of the second sealing structure is greater than or equal to a sum of a thickness of the fixing tape, a thickness of the lower polarizer, and a thickness of the thin film transistor substrate.

### Claim 10 (depends on 7)

The display module of claim 7, further comprising an optical adhesive disposed between the display panel and the cover plate.

### Claim 11 (depends on 10)

The display module of claim 10, wherein the first sealing structure is stretchable, and a thickness of the first sealing structure is greater than or equal to a sum of a thickness of the color filter substrate, a thickness of the liquid crystal layer, a thickness of the upper polarizer, and a thickness of the optical adhesive.

### Claim 12 (depends on 4)

The display module of claim 4, wherein the backlight module is attached to the bottom wall of the backlight housing, and an interspace is provided between the backlight module and the bracket.

### Claim 13 (depends on 1)

The display module of claim 1, wherein the first sealing structure is a sealed foam.

### Claim 14 (depends on 1)

The display module of claim 1, wherein the second sealing structure is a sealed foam.

### Claim 15 (depends on 1)

The display module of claim 1, wherein the backlight module comprises a reflective sheet, a light guide plate, and a brightness enhancement film sequentially stacked from bottom to top.

### Claim 16 (depends on 15)

The display module of claim 15, wherein the brightness enhancement film comprises a lower diffusion sheet, a lower brightness enhancement sheet, an upper brightness enhancement sheet, and an upper diffusion sheet sequentially stacked from bottom to top.

### Claim 17

A display module, comprising:
a backlight housing comprising a bottom wall and a side wall, the bottom wall and the side wall enclosed as an accommodation space;
a backlight module received in the accommodation space;
a bracket disposed in the backlight housing and disposed at a side of the backlight module;
a display panel disposed on the bracket;
a cover plate disposed on the display panel, wherein a gap is provided between a surface of the cover plate facing the backlight housing and a surface of the side wall of the backlight housing facing the cover plate;
a flexible circuit board electrically connected to the display panel through the gap;
a first sealing structure disposed between the flexible circuit board and the surface of the cover plate facing the backlight housing; and a second sealing structure disposed between the flexible circuit board and the surface of the side wall of the backlight housing facing the cover plate, and the first sealing structure and the second sealing structure are stretchable sealed foam.