Light guide plate and back light system using same

Details Light guide plate and back light system using same Light guide plate and back light system using same

2007-11-06

2007-11-06

Font, Frank G. (Department: 2883)

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

C362S026000, C362S060000, C362S060000, C362S551000, C362S561000, C362S330000, C362S339000, C349S062000, C385S901000

Reexamination Certificate

active

10949755

ABSTRACT:
A back light system (2) includes a light guide plate (20) and light sources (21). The light guide plate includes an optical output surface (203), a bottom surface (202) opposite to the output surface, and optical input surfaces (201) between the output and bottom surfaces. The light sources are positioned adjacent the input surfaces respectively. A thickness of a middle of the light guide plate is less than a thickness of a periphery of the light guide plate. In operation, light beams from two opposite of the light sources provide ample optical energy to a middle area of the output surface. In addition, a total optical energy at peripheral areas of the output surface is the same as or similar to a total optical energy at the middle area of the output surface. Thus, the back light system provides very high and highly uniform brightness for an associated LCD.

REFERENCES:
patent: 5040098 (1991-08-01), Tanaka et al.
patent: 5046826 (1991-09-01), Iwamoto et al.
patent: 5050946 (1991-09-01), Hathaway et al.
patent: 5064276 (1991-11-01), Endo et al.
patent: 5718497 (1998-02-01), Yokoyama et al.
patent: 5886759 (1999-03-01), Mashino et al.
patent: 6011602 (2000-01-01), Miyashita et al.
patent: 6196691 (2001-03-01), Ochiai
patent: 6244719 (2001-06-01), Oda et al.
patent: 6672733 (2004-01-01), Nagatani
patent: 7086774 (2006-08-01), Katsuda et al.
patent: 2004/0062030 (2004-04-01), Yamada et al.
patent: 2004/0202436 (2004-10-01), Cho et al.
patent: P2003-084140 (2003-03-01), None
patent: P2003-272426 (2003-09-01), None

Affiliated with

Also associated with

Rating

Light guide plate and back light system using same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light guide plate and back light system using same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light guide plate and back light system using same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3886840