Illumination – Edge lighted panel – Light modifier with emission face combined with light guide...
Reexamination Certificate
2005-11-17
2008-10-07
Choi, Jacob Y (Department: 2885)
Illumination
Edge lighted panel
Light modifier with emission face combined with light guide...
C362S610000, C362S615000, C362S607000, C362S616000
Reexamination Certificate
active
07431489
ABSTRACT:
An enhanced light fixture containing a volumetric, anisotropic diffuser to control the spatial luminance uniformity and angular spread of light from the light fixture is disclosed. The anisotropic diffuser provides increased spatial luminance uniformity and efficient control over the illuminance such that power reductions, reduced cost or reduced size may be achieved. The anisotropic diffuser contains one or more regions of asymmetrically shaped light scattering particles. The spread of illumination of light from a light emitting source can be efficiently controlled by using a thin, low cost, volumetric, asymmetric diffuser to direct the light in the desired direction. This allows the reduction in number of light sources, a reduction in power requirements, or a more tailored illumination. When the anisotropic diffuser is used in combination with a waveguide to extract light, the light is efficiently coupled out of the waveguide in a thin, planar surface. This transmissive diffuser can be coupled to a reflecting element such that the resulting combination is a light reflecting element with a desired asymmetric light scattering profile.
REFERENCES:
patent: 5845035 (1998-12-01), Wimberger-Friedl
patent: 6020944 (2000-02-01), Hoshi
patent: 6750996 (2004-06-01), Jagt et al.
patent: 2001/0030860 (2001-10-01), Kimura et al.
patent: 2003/0002153 (2003-01-01), Hiraishi et al.
patent: 2003/0011725 (2003-01-01), Ohkawa et al.
patent: 2003/0058386 (2003-03-01), Bastiaansen et al.
patent: 2005/0068759 (2005-03-01), Takemoto et al.
patent: 2005/0254259 (2005-11-01), Yamashita et al.
patent: 2006/0056196 (2006-03-01), Masuda
patent: 2006/0181903 (2006-08-01), Okuwaki
Patent Abstracts of Japan, vol. 2000, No. 26, Jul. 1, 2002 & JP 2001 249205 A (Keiwa Inc.), Sep. 14, 2001, Abstract.
Patent Abstracts of Japan, vol. 2003, No. 12, Dec. 5, 2003 & JP 2003 302629 A (Daicel Chem. Ind. Ltd.; Mitsubishi Electric Corp.) Oct. 24, 2003, Abstract.
International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, for PCT/US2005/042053, mailed May 4, 2006.
Coleman Zane A.
Yeo Terence E.
Choi Jacob Y
Fusion Optix Inc.
LandOfFree
Enhanced light fixture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enhanced light fixture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced light fixture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4010633