HIGH BRIGHTNESS DIFFUSION PLATE

• US 20080247190A1
• Filed: 08/06/2007
• Published: 10/09/2008
• Est. Priority Date: 04/04/2007
• Status: Abandoned Application

• Current Assignee: Coretronic Corporation
• Original Assignee: Coretronic Corporation
• Inventors: Shiau, Tzeng-Ke, Liu, Ming-Dah, Kung, Shin-Ping, Luh, Lung-Shiang, Wang, Bih-Chang, Lin, Huan-Tsung, Hsaio, Der-Woei
• Application Number:
  US11/834,022
• Publication Number:
  US 20080247190A1
• Time in Patent Office: Days
• US Class Current: 362/608
• CPC Class Codes: G02B 5/0215 the surface having a regular structure
• CPC Class Codes: G02B 5/0242 by means of dispersed particles
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members

Abstract

A high brightness diffusion plate for homogenizing light beams provided by at least one light source of a backlight module to a display panel is provided, which includes a diffusion layer, a transmittance layer, and a plurality of connecters. The transmittance layer is disposed above the diffusion layer, and the connecters are connected between the diffusion layer and the transmittance layer. Since the high brightness diffusion plate of the present invention is an integrated structure and is stronger, the present invention is not only easier for being assembled inside the backlight module, but also makes the light source provided by the backlight module being more homogeneous.

Claims

1. A high brightness diffusion plate adapted for homogenizing light beams provided by at least one light source of a backlight module to a display panel, comprising:

a diffusion layer;

a transmittance layer, disposed above the diffusion layer; and

a plurality of connecters, connected between the diffusion layer and the transmittance layer.

2. The high brightness diffusion plate as claimed in claim 1, wherein the backlight module further comprises a plurality of lamps for providing the light source, a plurality of diffusion particles are distributed in the diffusion layer for diffusing light beams of the light source incident into the diffusion layer.

3. The high brightness diffusion plate as claimed in claim 2, wherein after passing through the diffusion layer, the light beams are adapted for being incident into the transmittance layer and passing through a light-emitting surface of the transmittance layer to be projected onto the display panel, and the shapes of the light beams before and after passing through the light-emitting surface are substantially the same.

4. The high brightness diffusion plate as claimed in claim 3, wherein the light-emitting surface has a microstructure selected from a hill shape, a concave shape, a pyramid shape, a conical shape, a spherical shape, a polygon shape, a saw tooth shape and a combination thereof.

5. The high brightness diffusion plate as claimed in claim 1, wherein the material of the transmittance layer comprises polyethylene terephthalate, polycarbonate, or polymeric methyl methacrylate.

6. The high brightness diffusion plate as claimed in claim 1, wherein the diffusion layer and the connecters are formed integrally.

7. The high brightness diffusion plate as claimed in claim 1, wherein the transmittance layer and the connecters are formed integrally.

8. The high brightness diffusion plate as claimed in claim 1, wherein the process of connecting the connecters between the diffusion layer and the transmittance layer comprises a bonding technique or a heat sealing technique.

9. The high brightness diffusion plate as claimed in claim 1, wherein the connecters comprise bumps or ribs.

10. The high brightness diffusion plate as claimed in claim 1, wherein the high brightness diffusion plate is used in a direct type backlight module.