Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-07-10
2000-06-13
Saras, Steven J.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 97, 349 72, 349142, G09G 336
Patent
active
060755121
ABSTRACT:
A method and apparatus for compensating for temporally varying effects, such as temperature, in a liquid-crystal cell, particularly a wedge-shaped liquid-crystal cell. The temperature of the liquid crystal is measured, either directly with a thermocouple or the like, or by optical means which depend upon the temperature of the liquid crystal. For example, an intensity detector monitors the polarization rotation of a probe beam of light having a substantially different wavelength than that of the beam modulated by the liquid crystal, and a feedback circuit keeps the intensity at a predetermined value corresponding to the optimum path length in the liquid crystal of the modulated beam. The feedback signal from the temperature measurement is used to effectively change the gap filled with liquid crystal. For a wedge-shaped cell, the gap size is changed by moving the cell in the wedge direction. Other cell structures are available in which the gap size is physically changed by mechanical movement of the cell walls.
REFERENCES:
patent: 4840461 (1989-06-01), Winter et al.
patent: 4952032 (1990-08-01), Inoue et al.
patent: 5113275 (1992-05-01), Patel et al.
patent: 5615029 (1997-03-01), Moddel et al.
patent: 5841500 (1998-11-01), Patel
Chiao Jung-Chih
Patel Jayantilal
Nelson Alecia D.
Saras Steven J.
Tellium Inc.
LandOfFree
Temperature compensation of a wedge-shaped liquid-crystal cell does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature compensation of a wedge-shaped liquid-crystal cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature compensation of a wedge-shaped liquid-crystal cell will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2072876