Light guide device, light source device, and liquid crystal disp

Details Light guide device, light source device, and liquid crystal disp Light guide device, light source device, and liquid crystal disp

1994-06-24

1998-06-09

Ngo, John

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

385 89, 385 88, 385901, G02B 626

Patent

active

057648450

ABSTRACT:
An object of the present invention is to provide a light guide device which can emit light rays of high directivity with high efficiency irrespective of incident angles, and a light source device using the light guide device which can provide light rays of high directivity with high efficiency irrespective of emitting characteristics of light source lamps, and a liquid crystal display device which is small-sized and can display at very high luminance and is free from color tone changes depending on visual angles over a wide field angle. A substantial point light source is contained in a reflection box having an inside wall coated with a silver reflecting surface and an opening in the shape of a pinhole formed in a surface of the reflection box, and the light guide device is provided in the pinhole-shaped opening. The light guide device is a cylindrical transparent body. An incident end surface of the light guide device has a 1 mm-diameter, and an exit end surface of the light guide device has a 6.2 mm-diameter and a 100 mm-length. Source light from the substantial light source enters the incident end surface of the light guide device through the pinhole-shaped opening, repeats total reflection within the light guide device to exit at the exit end surface in light rays of high directivity of about .+-.10.degree..

REFERENCES:
patent: 2589569 (1952-03-01), Peter et al.
patent: 3901581 (1975-08-01), Theil
patent: 4240692 (1980-12-01), Winston
patent: 4382656 (1983-05-01), Gilby
patent: 4915479 (1990-04-01), Clarke
patent: 4978186 (1990-12-01), Mori
patent: 5093890 (1992-03-01), Bregmann et al.
patent: 5359691 (1994-10-01), Tai et al.
patent: 5462700 (1995-10-01), Beeson et al.
patent: 5475571 (1995-12-01), Dassananyake

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