Light guide plate and surface light source using same

Details Light guide plate and surface light source using same Light guide plate and surface light source using same

2008-05-13

2008-05-13

Pay, Sharon E. (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S608000, C362S615000, C362S620000, C362S617000

Reexamination Certificate

active

11249300

ABSTRACT:
An exemplary light guide plate (500) includes: a light incident portion (51) for receiving a light; a light reflecting portion (52) for reflecting the light input through the light incident portion; and a light emitting portion (53) opposite to the light reflecting portion, for outputting the reflected light. The light incident portion includes a first diffractive optical element (512) located thereat. The first diffractive optical element includes a plurality of protrusions (512a) each having a curved surface, with the protrusions being arranged symmetrically opposite to each other across a central axis of symmetry of the first diffractive optical element. The light emitting portion may include a second diffractive optical element (532) located thereat. The second diffractive optical element includes a plurality of elongate protrusions, with the protrusions being arranged symmetrically opposite to each other across a central axis of symmetry of the second diffractive optical element.

REFERENCES:
patent: 5997148 (1999-12-01), Ohkawa
patent: 6421104 (2002-07-01), Richard
patent: 6636283 (2003-10-01), Sasagawa et al.
patent: 6974241 (2005-12-01), Hara et al.
patent: 7039286 (2006-05-01), Leu et al.
patent: 2001/0035927 (2001-11-01), Sasagawa
patent: 2002/0048163 (2002-04-01), Kawakami et al.
patent: 2003/0214848 (2003-11-01), Ehara et al.
patent: 2005/0190578 (2005-09-01), Miyashita
patent: 9133920 (1997-05-01), None
patent: 10-199316 (1998-07-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3941571