LIQUID CRYSTAL DISPLAY DEVICE AND BACKLIGHT MODULE THEREOF

• US 20120154712A1
• Filed: 03/10/2011
• Published: 06/21/2012
• Est. Priority Date: 12/16/2010
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Yu, Shang-Wen, Lin, Chin-Yung
• Application Number:
  US13/044,549
• Publication Number:
  US 20120154712A1
• Time in Patent Office: Days
• US Class Current: 349/64
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members

Abstract

A liquid crystal display (LCD) device includes an LCD panel, a backlight module and an anti-reflective layer. The backlight module further includes a light source for providing lights, a light guide plate having a light-emitting surface and a lower surface opposite to the light-emitting surface, and a first prism layer and a second prism layer positioned on a side of the light-emitting surface. The anti-reflective layer is positioned between the first prism layer and the second prism layer, or is positioned between the first prism layer and the LCD panel.

Claims

1. A backlight module comprising:

a light source providing lights;

a light guide plate having a light-emitting surface and a lower surface opposite to the light-emitting surface;

a first prism layer positioned on a side corresponding to the light-emitting surface of the light guide plate;

a second prism layer; and

an anti-reflective layer positioned between the first prism layer and the second prism layer.

2. The backlight module of claim 1, wherein the first prism layer comprises a plurality of first prism structures and the second prism layer comprises a plurality of second prism structures.

3. The backlight module of claim 2, wherein the first prism structures are arranged along a first direction and the second prism structures are arranged along a second direction.

4. A liquid crystal display (LCD) device comprises:

a LCD panel;

a backlight module comprising;

a light source for providing lights;

a light guide plate having a light-emitting surface and a lower surface opposite to the light-emitting surface; and

a first prism layer positioned on a side corresponding to the light-emitting surface of the light guide plate; and

a first anti-reflective layer positioned between the first prism layer and the LCD panel.

5. The LCD device of claim 4, wherein the LCD panel further comprising:

a color filter substrate;

a thin film transistor (TFT) array substrate;

an upper polarizer positioned on a surface of the color filter substrate opposite to the TFT array substrate; and

a lower polarizer positioned on a surface of the TFT array substrate opposite to the color filter substrate.

6. The LCD device of claim 5, wherein the first anti-reflective layer is positioned between the lower polarizer and the first prism layer.

7. The LCD device of claim 5, wherein the backlight module further comprises a second prism layer.

8. The LCD device of claim 7, wherein the second prism layer is positioned between the first anti-reflective layer and the lower polarizer.

9. The LCD device of claim 7, wherein the second prism layer is positioned between the first anti-reflective layer and the first prism layer.

10. The LCD device of claim 9, further comprising a second anti-reflective layer positioned between the first prism layer and the second prism layer.

11. The LCD device of claim 7, wherein the first prism layer comprises a plurality of first prism structures and the second prism layer comprises a plurality of second prism structures.

12. The LCD device of claim 11, wherein the first prism structures are arranged along a first direction and the second prism structures are arranged along a second direction.

13. The LCD device of claim 4, further comprising a diffuser positioned between the light guide plate and the first prism layer.

14. The LCD device of claim 13, further comprising a third anti-reflective layer positioned between the first prism layer and the diffuser.