Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements
Patent
1996-04-16
2000-09-05
Mack, Ricky
Optical: systems and elements
Single channel simultaneously to or from plural channels
By surface composed of lenticular elements
359626, G02B 2710
Patent
active
061151831
ABSTRACT:
The disclosure relates to a device for illumination of a screen, notably a liquid-crystal screen. It includes a light integrator that receives a light beam from a source and outputs an illuminating beam for the screen. The light integrator makes use of lenses, but has no lenses in the parts of the beam where the energy flux is weak, which enables more uniform illumination of the screen. To improve the contrast of the illumination of the liquid-crystal screen, the whole illuminating beam is directed onto the screen at an angle to the optical axis of the system. The invention is applicable to liquid-crystal screens.
REFERENCES:
patent: 4124279 (1978-11-01), Byles
patent: 4733944 (1988-03-01), Fahlen et al.
Patent Abstracts of Japan, vol. 16, No. 313, Jul. 9, 1992 & JP-A-04 088317 (Sharp).
Patent Abstracts of Japan, vo. 17, No. 448, Aug. 17, 1993 & JP-A-05 100331 (Toshiba) Apr. 23, 1993.
IBM Technical Disclosure Bulletin, vol. 36, No. 09b, Sep. 1993 pp. 453-456, "Improved Liquid Crystal Display Panel Illumination".
Drazic Valtor
Marcellin-Dibon Eric
Sarayeddine Khaled
Emanuel Peter M.
Mack Ricky
Thomson Multimedia S.A.
Tripoli Joseph S.
Wein Frederick A.
LandOfFree
Lighting 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 Lighting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lighting device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2218547