Illumination – Revolving
Patent
1997-02-03
1999-08-03
Cariaso, Alan
Illumination
Revolving
362 27, 349 64, 349 65, F21V 800
Patent
active
059315555
ABSTRACT:
A background lighting apparatus includes a light entering edge surface around substantially the entire periphery of a highly specular transparent plate wherein light beams enter from peripheral light sources and travel toward the central portion of the plate and are dispersed and diffused by a diffusion system formed relative to the transparent plate. Uniformity of luminance provided from the background lighting apparatus is enhanced as a whole by increasing the incident quality of the input light beams into the transparent plate while easing the incident directivity of the light beams on the transparent plate with the overall substantial enhancement of luminance produced from the apparatus. Further, the temperature distribution on a liquid crystal panel positioned adjacent to the output surface of the background lighting apparatus is substantially uniform across the panel so that the transmission quality of the liquid crystal material, which is dependent upon ambient temperatures, is made substantially more uniform resulting in significantly higher levels of uniformity in luminance across the display as well as uniformity of displayed colors and gradations thereof emanating from the display panel.
REFERENCES:
patent: 3328570 (1967-06-01), Balchunas
patent: 3892959 (1975-07-01), Pulles
patent: 3968584 (1976-07-01), Kingston
patent: 4568179 (1986-02-01), Durbin et al.
patent: 4630895 (1986-12-01), Abdala, Jr. et al.
patent: 4648690 (1987-03-01), Ohe
patent: 4729067 (1988-03-01), Ohe
patent: 4729068 (1988-03-01), Ohe
patent: 4811507 (1989-03-01), Blanchet
patent: 4842378 (1989-06-01), Flasck et al.
patent: 4860171 (1989-08-01), Kojima
patent: 4933814 (1990-06-01), Sanai
patent: 4965950 (1990-10-01), Yamada
patent: 4974122 (1990-11-01), Shaw
patent: 4985809 (1991-01-01), Matsui et al.
patent: 5057974 (1991-10-01), Mizobe
patent: 5124890 (1992-06-01), Choi et al.
patent: 5130898 (1992-07-01), Akahane
patent: 5134549 (1992-07-01), Yokoyama
patent: 5136483 (1992-08-01), Schoniger et al.
patent: 5283673 (1994-02-01), Murase et al.
patent: 5363294 (1994-11-01), Yamamoto et al.
patent: 5667289 (1997-09-01), Akahane et al.
"Advancements in Backlighting Technologies for LCDs," K. Hathaway, Spie Proceedings, High-Resolution Displays and Projection Systems, vol. 1664, Feb. 1992, pp. 108-116.
Electronic Design, Aug. 2, 1961, p. 47.
Voltael Technical Bulletin "Fluorescent Lamp", 1987.
Akahane Fumiaki
Funamoto Tatsuaki
Yagasaki Tooru
Cariaso Alan
Gabrik Michael T.
Seiko Epson Corporation
LandOfFree
Background lighting apparatus for liquid crystal display does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Background lighting apparatus for liquid crystal display, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Background lighting apparatus for liquid crystal display will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-842785