Diffuser in direct back light module

• US 20060083020A1
• Filed: 10/15/2004
• Published: 04/20/2006
• Est. Priority Date: 10/15/2004
• Status: Abandoned Application

• Current Assignee: Radiant Opto-Electronics Corp.
• Original Assignee: Radiant Opto-Electronics Corp.
• Inventors: Lin, Yi-Fang, Wang, Ying-Fu, Chu, Yen Chuan, Tai, Chung-Yung
• Application Number:
  US10/964,663
• Publication Number:
  US 20060083020A1
• Time in Patent Office: Days
• US Class Current: 362/558
• CPC Class Codes: G02B 5/0242 by means of dispersed particles
• CPC Class Codes: G02B 5/0263 with positional variation of the diffusing properties, e.g. gradient or patterned diffuser
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02B 5/0294 adapted to provide an additional optical effect, e.g. anti-reflection or filter
• CPC Class Codes: G02B 6/0041 provided in the bulk of the light guide
• CPC Class Codes: G02B 6/0061 to provide homogeneous light output intensity

Abstract

A diffuser in a direct back light module comprised of multiple, minute, 3D conductors in staggered arrangement in the plate of the diffuser to permit the light passing through it to have multiple reflections in multiple directions and in turn the consistent diffusion for light source.

Claims

1. A diffuser in a direct back light module includes a casing having on its inner side applied with a reflective coating or attached with a reflection film;

multiple cold cathode tubes arranged in sequence at a given spacing in the casing;

a diffuser proved above those cold cathode tubes; and

multiple solid, opaque, and minute light conductors being distributed and arranged in 3D staggered fashion in the diffuser.

2. The diffuser in a direct back light module of claim 1, wherein, the light conductor is made in the form of a polyhedron.

3. The diffuser in a direct back light module of claim 1, wherein, the light conductor is made in the form of a ball.

4. The diffuser in a direct back light module of claim 1, wherein, the light conductor is mad in the form of an oval ball.

5. The diffuser in a direct back light module of claim 1, wherein, the density of those light conductors in a brighter area of each cold cathode tube at where in relation to the diffuser is higher than that of any location of the diffuser other than the brighter area.

6. The diffuser in a direct back light module of claim 1, wherein, it contains multiple light conductors made in different sizes.

7. A diffuser in a direct back light module essentially formed by having preset multiple focusing locations to be exposed to laser beams;

each focusing location being exposed to long wave laser beams outputted from a laser generator;

each focusing location after exposure to the mask being fused to rearrange the molecules of the substance at that location;

molecules so rearranged when cooled down being crystallized into multiple opaque solid light conductors; and

the massive formation of the light conductors constituting the diffusion structure for the diffuser.

8. A diffuser in a direct back light module essentially formed by having preset multiple focusing locations to be exposed to laser beams;

each focusing location being exposed to short wave laser beams outputted from a laser generator;

molecular bonds of the material at each focusing area within the exposure area being destroyed after exposure to the laser mask to produce multiple solid light conductors; and

the massive formation of the light conductors constituting the diffusion structure for the diffuser.