# US 2014/0192553 A1 · Backlight module with light-varying structures formed in a light guide plate

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- Number: US 2014/0192553 A1
- Document ID: US20140192553A1
- Status: Published application
- Kind: A1
- Application number: 13/896,198
- Filed: 2013-05-16
- Published: 2014-07-10
- Earliest claimed: 2013-01-06
- Assignees: Wistron Corporation
- Applicants: Wistron Corp.
- Inventors: Chin-Yung Liu; Ya-Ping Niu
- Web page: https://patentgrep.com/patent/US20140192553A1

## CPC

- G02B 6/0035: {provided on the surface of the light guide or in the bulk of it}
- G02B 6/0041: {provided in the bulk of the light guide}
- G02B 6/005: {provided by one optical element, or plurality thereof, placed on the light output side of the light guide}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A backlight module is disclosed. A light guide plate includes a main body and a plurality of light-varying structures. The main body includes a top surface and a bottom surface. The light-varying structures are formed in the main body. A first optical film is formed on the top surface of the main body of the light guide plate. A second optical film is formed on the bottom surface of the main body of the light guide plate. At least one light source is adjacent to the light guide plate, outputting light into the light guide plate.

## Claims

### Claim 1

A backlight module, comprising:
a light guide plate comprising a main body and a plurality of light-varying structures, wherein the main body comprises a top surface and a bottom surface, and the light-varying structures are formed in the main body;
a first optical film, formed on the top surface of the main body of the light guide plate;
a second optical film formed on the bottom surface of the main body of the light guide plate; and
at least one light source adjacent to the light guide plate, outputting light into the light guide plate.

### Claim 2 (depends on 1)

The backlight module as claimed in claim 1, wherein the light-varying structures are provided with a same horizontal height in the main body of the light guide plate.

### Claim 3 (depends on 1)

The backlight module as claimed in claim 1, wherein the light-varying structures are provided with different horizontal heights in the main body of the light guide plate.

### Claim 4 (depends on 1)

The backlight module as claimed in claim 1, wherein the light-varying structures are provided with a hemispherical shape.

### Claim 5 (depends on 1)

The backlight module as claimed in claim 1, wherein the light-varying structures are provided with a cylindrical shape.

### Claim 6 (depends on 1)

The backlight module as claimed in claim 1, wherein the light-varying structures are provided with a prismatic shape.

### Claim 7 (depends on 1)

The backlight module as claimed in claim 1, wherein the light-varying structures are provided with a pyramidal shape.

### Claim 8 (depends on 1)

The backlight module as claimed in claim 1, wherein the first optical film comprises a reflective film, a diffusion film, or a prism film.

### Claim 9 (depends on 1)

The backlight module as claimed in claim 1, wherein the second optical film comprises a reflective film, a diffusion film, or a prism film.

### Claim 10 (depends on 1)

The backlight module as claimed in claim 1, wherein the first and second optical films are respectively coated on the top and bottom surfaces.