Surface light source device and display device

Optical waveguides – Noncyclindrical or nonplanar shaped waveguide

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C385S901000, C362S615000, C362S628000

Reexamination Certificate

active

10958998

ABSTRACT:
In a front light equipped with a light source and a transparent plate emitting light from a light emitting surface which is situated at the reverse side against an observation side surface by conducting light from the light source, the reflection preventive patterns comprising the minute unevennesses30for prevention of reflection are formed on the light emitting surface. When a wavelength of visible light with the shortest wavelength among light which is emitted from the light source24is λmin, the refractive index of the transparent plate is n1and the refractive index of air is n0, the period p of the minute unevennesses30satisfies the following equation. p<λmin/(n0+n1). Thereby, it can be prevented that the diffracted light is emitted from the reflection preventive patterns (light emitting surface) of the transparent plate.

REFERENCES:
patent: 4053206 (1977-10-01), Yevick
patent: 6592233 (2003-07-01), Parikka
patent: 6633722 (2003-10-01), Kohara et al.
patent: 6735354 (2004-05-01), Hamada
patent: 6808282 (2004-10-01), Ishitaka
patent: 2005/0180720 (2005-08-01), Hara et al.
patent: 0 778 484 (1997-06-01), None
patent: 0 879 991 (1998-11-01), None
patent: 1 329 762 (2003-07-01), None
patent: 2 281 802 (1994-08-01), None
patent: 2000-100229 (2000-04-01), None
patent: 2002-250917 (2002-09-01), None
patent: WO 02/29454 (2002-04-01), None
Patent Abstracts of Japan, Publication No. 2002-250917 dated Sep. 6, 2002, 2 pages.
European Search Report dated Feb. 2, 2005 ( 3 pages).
Patent Abstracts of Japan, Publication No. 2000-100229, Publication Date Apr. 7, 2000, 2 pages.
Japanese Office Action for Japanese Application No. JP2004-264750, mailed May 24, 2005, 4 pages.
Japanese Office Action for Japanese Patent Application No. JP2005-212171 mailed Oct. 25, 2005, 2 pages.
“Diffractive Optics for Industrial and Commercial Applications”; edited by Jari Turunen and Frank Wyrowski; XP008056697; pp. 308-311, no date.
EPO Communication pursuant to article 96(2) dated Dec. 14, 2005.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Surface light source device and display device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Surface light source device and display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface light source device and display device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3798265

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.