Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2006-11-21
2009-06-23
Pak, Sung H (Department: 2874)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C385S146000, C362S612000, C362S615000
Reexamination Certificate
active
07551243
ABSTRACT:
A lens for use in a lighting arrangement, such as an LCD backlight, includes a light guiding region and a lens surface. The light guiding region is shaped to focus light from a light source toward a region of the lens located on its periphery. The lens surface has reflection regions for reflecting light from the light source back into the lens and transmission regions for transmitting light from the light source outside the lens. A characteristic of the transmissions regions, such as width, varies as a function of the location of the light source so as to create substantially uniform average light distribution for areas of the lens positioned at various distances with respect to the light source.
REFERENCES:
patent: 5197792 (1993-03-01), Jiao et al.
patent: 5550676 (1996-08-01), Ohe et al.
patent: 6123431 (2000-09-01), Teragaki et al.
patent: 6124906 (2000-09-01), Kawada et al.
patent: 6447136 (2002-09-01), Liu et al.
patent: 6473554 (2002-10-01), Pelka et al.
patent: 6538710 (2003-03-01), Jang
patent: 6608614 (2003-08-01), Johnson
patent: 6609808 (2003-08-01), Chen
patent: 6612722 (2003-09-01), Ryu et al.
patent: 6667782 (2003-12-01), Taira et al.
patent: 6690435 (2004-02-01), Ha et al.
patent: 6867828 (2005-03-01), Taira et al.
patent: 6883925 (2005-04-01), Leu et al.
patent: 2004/0076010 (2004-04-01), Kuo
patent: 2004/0207999 (2004-10-01), Suehiro et al.
patent: 2005/0068777 (2005-03-01), Popovic
patent: 2005/0140849 (2005-06-01), Hoelen et al.
patent: 2006/0238873 (2006-10-01), Park et al.
patent: 2007/0153546 (2007-07-01), Wu
patent: 2007/0189701 (2007-08-01), Chakmakjian et al.
patent: 1701389 (2006-09-01), None
patent: 1715366 (2006-10-01), None
patent: 10276298 (1998-10-01), None
PCT Search Report, PCT/US2007/085051 dated May 30, 2008.
Honeywell International , Inc.
Ingrassia Fisher & Lorenz P.C.
Pak Sung H
Stahl Mike
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