Apparatus for homogeneously distributing lights

• US 20050128745A1
• Filed: 02/23/2004
• Published: 06/16/2005
• Est. Priority Date: 12/12/2003
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Pao, Yu-Nan, Lin, Yu-Cheng, Lin, Tsung-Hsin, Lin, Kuen-Lung
• Granted Patent: US 7,125,141 B2
• Time in Patent Office: Days
• US Class Current: 362/244
• CPC Class Codes: G02B 6/0016 Grooves, prisms, gratings, scattering particles or rough surfaces
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0043 provided on the surface of the light guide

Abstract

An apparatus for homogeneously distributing lights includes a light guide plate, an incidence microstructure and an emergence microstructure. The incidence microstructure is arranged on a surface of the light guide plate and opposite to a light source. The emergence microstructure is arranged on a surface of the light guide plate opposite to the incidence microstructure. The lights emitted by the light source pass through said apparatus thereby being homogenously distributed. Thus the manufacture costs are lowered, and the light source utilization ratio is increased.

Claims

1. An apparatus for homogeneously distributing lights, comprising:

a light guide plate;

an incidence microstructure being arranged on a surface of the light guide plate and opposite to a light source; and

an emergence microstructure, the emergence microstructure being arranged on a surface of the light guide plate opposite to the incidence microstructure;

wherein the lights emitted by the light source pass through said apparatus thereby being homogenously distributed.

2. The apparatus as claimed in claim 1, wherein the incidence microstructure is a continuous structure or a discontinuous structure having a triangle cross-section and longitudinally arranged along the light source.

3. The apparatus as claimed in claim 1, wherein the emergence microstructure is a continuous structure or a discontinuous structure having a triangle cross-section and longitudinally arranged along the light source.

4. The apparatus as claimed in claim 1, wherein the emergence microstructure is a micro lens array structure.

5. The apparatus as claimed in claim 4, wherein the micro lens array structure is a structure selected from the groups consisting of honeycombed structure, circular dot structure and irregular structure.

6. The apparatus as claimed in claim 1, wherein the light source is a plurality of lamp.

7. The apparatus as claimed in claim 1, wherein the light guide plate is made of one of a light transmitting polymer material and a semi light transmitting polymer material.

8. The apparatus as claimed in claim 1, wherein the apparatus is applied to a backlight module of an LCD panel.