# US 10,871,605 B2 · Light guide plate, manufacturing method thereof and display device

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- Number: US 10,871,605 B2
- Document ID: US10871605B2
- Status: Granted
- Kind: B2
- Application number: 15/776,521
- Filed: 2017-10-25
- Published: 2020-06-11
- Granted: 2020-12-22
- Earliest claimed: 2017-03-31
- 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: Yang Chu; Xian Yang; Hongyu Zhao; Wenjia Sun; Haijun Shi; Zhanchang Bu
- Web page: https://patentgrep.com/patent/US10871605B2

## CPC

- G02B 6/0051: {Diffusing sheet or layer}
- G02B 6/0055: {Reflecting element, sheet or layer}
- G02B 6/0065: {Manufacturing aspects; Material aspects}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A light guide plate, a manufacturing method thereof, and a display device are provided. The light guide plate includes a glass substrate, an adhesive layer arranged at a surface of the glass substrate, a reflector arranged at a surface of the adhesive layer away from the glass substrate, and a total reflection structure distributed in the adhesive layer.

## Claims

### Claim 1

A light guide plate, comprising:
a glass substrate;
an adhesive layer arranged at a surface of the glass substrate;
a reflector arranged at a surface of the adhesive layer away from the glass substrate; and
a total reflection structure distributed in the adhesive layer,
wherein the total reflection structure comprises bubbles distributed in the adhesive layer.

### Claim 2 (depends on 1)

The light guide plate according to claim 1, wherein the adhesive layer has a thickness of 200 μm to 500 μm.

### Claim 3 (depends on 2)

The light guide plate according to claim 2, wherein the adhesive layer is made of an adhesive comprising at least one of a photoresist or an optical clear adhesive.

### Claim 4 (depends on 2)

The light guide plate according to claim 2, wherein the adhesive has a refractive index of 1.4 to 1.6.

### Claim 5 (depends on 3)

The light guide plate according to claim 3, wherein the adhesive layer has a density of 0.9 g/cm3 to 1.1 g/cm3.

### Claim 6

A light guide plate, comprising:
a glass substrate;
an adhesive layer arranged at a surface of the glass substrate;
a reflector arranged at a surface of the adhesive layer away from the glass substrate;
a total reflection structure distributed in the adhesive layer; and
a barrier member arranged between the glass substrate and the reflector and at least partially surrounding the adhesive layer.

### Claim 7

A light guide plate, comprising:
a glass substrate;
an adhesive layer arranged at a surface of the glass substrate;
a reflector arranged at a surface of the adhesive layer away from the glass substrate;
a total reflection structure distributed in the adhesive layer; and
a barrier member arranged between the glass substrate and the reflector and surrounding the adhesive layer.

### Claim 8 (depends on 1)

The light guide plate according to claim 1, wherein a ratio of a light intensity of a light beam at a light-exiting side of the glass substrate to a light intensity of a light beam at a light-entering side of the glass substrate is 0.6 to 0.8.

### Claim 9 (depends on 1)

A display device comprising the light guide plate according to claim 1.

### Claim 10 (depends on 1)

A method for manufacturing the light guide plate according to claim 1, comprising steps of:
providing a glass substrate;
forming an adhesive layer including a total reflection structure at a surface of the glass substrate; and
arranging a reflector at a surface of the adhesive layer away from the glass substrate.

### Claim 11 (depends on 10)

The method according to claim 10, wherein the total reflection structure comprises bubbles distributed in the adhesive layer, wherein the step of forming the adhesive layer comprises:
stirring an adhesive so as to form the bubbles therein;
coating the adhesive with the bubbles onto the surface of the glass substrate to form a layer of adhesive; and
curing the layer of adhesive so as to form the adhesive layer.

### Claim 12 (depends on 11)

The method according to claim 11, wherein the adhesive is stirred at a speed of 200 rpm to 2000 rpm for more than 30 minutes.

### Claim 13 (depends on 11)

The method according to claim 11, wherein at least one of gases consisting of compressed air, nitrogen and argon is added into the adhesive during the stirring.

### Claim 14 (depends on 13)

The method according to claim 13, wherein 1 L to 10 L of the gas is added per unit mass of the adhesive at a flow rate of 0.05 L/min to 0.5 L/min.

### Claim 15 (depends on 10)

The method according to claim 10, wherein the step of curing the adhesive is performed subsequent to the step of arranging the reflector, and an interval between the step of curing the adhesive and the step of forming the reflector is not greater than 60 s.

### Claim 16 (depends on 10)

The method according to claim 10, further comprising forming a barrier member between the glass substrate and the reflector, wherein the barrier member at least partially surrounds the adhesive layer.

### Claim 17 (depends on 10)

The method according to claim 10, further comprising forming a barrier member between the glass substrate and the reflector, wherein the barrier member surrounds the adhesive layer.