# US 10,310,325 B2 · Backlight module and display device

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- Number: US 10,310,325 B2
- Document ID: US10310325B2
- Status: Granted
- Kind: B2
- Application number: 15/540,162
- Filed: 2016-05-17
- Published: 2018-02-15
- Granted: 2019-06-04
- Earliest claimed: 2016-02-03
- Assignees: Boe Technology Group Co., Ltd.; Beijing Boe Display Technology Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.; Beijing Boe Display Technology Co., Ltd.
- Inventors: Zhanchang Bu; Ming Chen; Bochang Wang; Yang Chu; Xian Li
- Web page: https://patentgrep.com/patent/US10310325B2

## CPC

- G02F 1/133602: {Direct backlight}
- G02B 6/00: Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B 6/0011: {the light guides being planar or of plate-like form}
- G02B 6/0043: {provided on the surface of the light guide}
- G02B 6/0055: {Reflecting element, sheet or layer}
- G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)}
- 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

## Abstract

A backlight module and a display device are disclosed. The backlight module includes a bottom reflecting plate; a light guide plate (LGP) fixed over the bottom reflecting plate by means of glue; and a transparent material layer disposed between the bottom reflecting plate and the LGP, wherein a refractivity of the transparent material layer is at least lower than a refractivity of the LOP. The display device includes the backlight module.

## Claims

### Claim 1

A backlight module, comprising:
a bottom reflecting plate;
a light guide plate (LGP) fixed over the bottom reflecting plate by means of a glue layer; and
a transparent material layer disposed between the bottom reflecting plate and the LGP, wherein
a refractivity of the transparent material layer is at least lower than a refractivity of the LGP, wherein
the glue layer is disposed between the LGP and the transparent material layer, and
a material of the transparent material layer is one of or a combination of nano-Au and nano-bronze.

### Claim 2 (depends on 1)

The backlight module of claim 1, wherein the transparent material layer is disposed on a surface of the bottom reflecting plate facing the LGP, and the refractivity of the transparent material layer is further lower than a refractivity of the glue.

### Claim 3 (depends on 2)

The backlight module of claim 2, wherein the refractivity of the transparent material layer is lower than 1.2.

### Claim 4 (depends on 1)

The backlight module of claim 1, wherein the transparent material layer is disposed on a surface of the LGP facing the bottom reflecting plate.

### Claim 5 (depends on 4)

The backlight module of claim 4, wherein the refractivity of the transparent material layer is lower than 1.2.

### Claim 6 (depends on 1)

The backlight module of claim 1, wherein the refractivity of the transparent material layer is lower than 1.2.

### Claim 7 (depends on 6)

The backlight module of claim 6, wherein the refractivity of the transparent material layer is 0.18, 0.47 or 1.1.

### Claim 8 (depends on 1)

The backlight module of claim 1, wherein a thickness of the transparent material layer is 100 nm-80 μm.

### Claim 9 (depends on 8)

The backlight module of claim 8, wherein the thickness of the transparent material layer is 100 nm-5 μm.

### Claim 10

A display device comprising a backlight module, the backlight module comprises:
a bottom reflecting plate;
a light guide plate (LGP) fixed over the bottom reflecting plate by means of a glue layer; and
a transparent material layer disposed between the bottom reflecting plate and the LGP, wherein
a refractivity of the transparent material layer is at least lower than a refractivity of the LGP, wherein
the glue layer is disposed between the LGP and the transparent material layer, and
a material of the transparent material layer is one of or a combination of nano-Au and nano-bronze.

### Claim 11 (depends on 10)

The display device of claim 10, wherein the transparent material layer is disposed on a surface of the bottom reflecting plate facing the LGP, and the refractivity of the transparent material layer is further lower than a refractivity of the glue.

### Claim 12 (depends on 10)

The display device of claim 10, wherein the transparent material layer is disposed on a surface of the LGP facing the bottom reflecting plate.

### Claim 13 (depends on 10)

The display device of claim 10, wherein the refractivity of the transparent material layer is lower than 1.2.