# US 12,007,645 B2 · Light source module, liquid crystal display device, and a display apparatus

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- Number: US 12,007,645 B2
- Document ID: US12007645B2
- Status: Granted
- Kind: B2
- Application number: 17/597,943
- Filed: 2022-01-14
- Published: 2024-02-01
- Granted: 2024-06-11
- Earliest claimed: 2022-01-10
- Assignees: Tcl China Star Optoelectronics Technology Co., Ltd.
- Applicants: Tcl China Star Optoelectronics Technology Co., Ltd.
- Inventors: Bo Hai
- Web page: https://patentgrep.com/patent/US12007645B2

## CPC

- G02B 6/0036: {2-D arrangement of prisms, protrusions, indentations or roughened surfaces}
- G02F 1/133603: {with LEDs}
- G02B 6/0055: {Reflecting element, sheet or layer}
- G02B 6/0061: {to provide homogeneous light output intensity}
- G02B 6/0073: {Light emitting diode [LED]}
- G02F 1/133605: {including specially adapted reflectors}
- G02F 1/133616: {Front illuminating devices}
- G02F 2203/02: reflective
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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 light source module, a liquid crystal display device, and a display apparatus are provided. The light source module disposes a plurality of micro structures disposed at intervals on a light guide surface of a light guide plate and disposes a sum of areas of the micro structures on an unit area on the light guide surface gradually increasing from a light incident side to a light exiting side, which can improve uniformity of light exiting brightness of each region of the light guide plate.

## Claims

### Claim 1

A light source module, comprising:
a light guide plate, comprising a light guide surface and a light exiting surface disposed oppositely, wherein a plurality of micro structures are disposed on a light guide surface of the light guide plate at intervals, a side of the light guide plate disposed toward the light source is defined as a light incident side, a side of the light guide plate disposed away from the light source is defined as a light exiting side, and from the light incident side to the light exiting side, a sum of areas of the micro structures disposed on a unit area of the light guide surface gradually increases; and
a light source disposed on a side of the light guide plate;
wherein from the light incident side to the light exiting side, a number of the micro structures disposed on each unit area of the light guide surface gradually increases; and from the light incident side to the light exiting side, an area of each of the micro structures disposed on the light guide surface gradually increases.

### Claim 2 (depends on 1)

The light source module according to claim 1, wherein the light source module comprises a reflector disposed on a side of the light guide plate.

### Claim 3 (depends on 2)

The light source module according to claim 2, wherein the reflector is disposed on each of sides of the light guide plate except for a region of the light incident side.

### Claim 4 (depends on 2)

The light source module according to claim 2, wherein the reflector is adhered to the light guide plate through a light transmission adhesive.

### Claim 5 (depends on 1)

The light source module according to claim 1, wherein the micro structures are a protrusion structures or a recess structures.

### Claim 6 (depends on 1)

A liquid crystal display device, comprising:
a reflective liquid crystal display panel; and
the light source module according to claim 1 stacked on the reflective liquid crystal display panel;
wherein the light exiting surface of the light guide plate is disposed toward a display side of the reflective liquid crystal display panel.

### Claim 7

A light source module, comprising:
a light guide plate, comprising a light guide surface and a light exiting surface disposed oppositely, wherein a plurality of micro structures are disposed on a light guide surface of the light guide plate at intervals, a side of the light guide plate disposed toward the light source is defined as a light incident side, a side of the light guide plate disposed away from the light source is defined as a light exiting side, and from the light incident side to the light exiting side, a sum of areas of the micro structures disposed on a unit area of the light guide surface gradually increases; and
a light source disposed on a side of the light guide plate;
wherein from the light incident side to the light exiting side, a number of the micro structures disposed on each unit area of the light guide surface gradually decreases; and from the light incident side to the light exiting side, an area of each of the micro structures disposed on the light guide surface gradually increases.

### Claim 8 (depends on 7)

The light source module according to claim 7, wherein the light source module comprises a reflector disposed on a side of the light guide plate.

### Claim 9 (depends on 8)

The light source module according to claim 8, wherein the reflector is disposed on each of sides of the light guide plate except for a region of the light incident side.

### Claim 10 (depends on 8)

The light source module according to claim 8, wherein the reflector is adhered to the light guide plate through a light transmission adhesive.

### Claim 11 (depends on 7)

The light source module according to claim 7, wherein the micro structures are a protrusion structures or a recess structures.

### Claim 12 (depends on 7)

A liquid crystal display device, comprising:
a reflective liquid crystal display panel; and
the light source module according to claim 7 stacked on the reflective liquid crystal display panel;
wherein the light exiting surface of the light guide plate is disposed toward a display side of the reflective liquid crystal display panel.

### Claim 13

A light source module, comprising:
a light guide plate, comprising a light guide surface and a light exiting surface disposed oppositely, wherein a plurality of micro structures are disposed on a light guide surface of the light guide plate at intervals, a side of the light guide plate disposed toward the light source is defined as a light incident side, a side of the light guide plate disposed away from the light source is defined as a light exiting side, and from the light incident side to the light exiting side, a sum of areas of the micro structures disposed on a unit area of the light guide surface gradually increases; and
a light source disposed on a side of the light guide plate;
wherein from the light incident side to the light exiting side, a number of the micro structures disposed on each unit area of the light guide surface gradually increases; and from the light incident side to the light exiting side, an area of each of the micro structures disposed on the light guide surface gradually decreases.

### Claim 14 (depends on 13)

The light source module according to claim 13, wherein the light source module comprises a reflector disposed on a side of the light guide plate.

### Claim 15 (depends on 14)

The light source module according to claim 14, wherein the reflector is disposed on each of sides of the light guide plate except for a region of the light incident side.

### Claim 16 (depends on 14)

The light source module according to claim 14, wherein the reflector is adhered to the light guide plate through a light transmission adhesive.

### Claim 17 (depends on 13)

The light source module according to claim 13, wherein the micro structures are a protrusion structures or a recess structures.

### Claim 18 (depends on 13)

A liquid crystal display device, comprising:
a reflective liquid crystal display panel; and
the light source module according to claim 13 stacked on the reflective liquid crystal display panel;
wherein the light exiting surface of the light guide plate is disposed toward a display side of the reflective liquid crystal display panel.