Device for the modulation of the illuminating light of an electr

Details Device for the modulation of the illuminating light of an electr Device for the modulation of the illuminating light of an electr

1987-04-20

1989-04-25

Miller, Stanley D.

350332, 350335, 350339R, 350345, G02F 113

Patent

active

048242160

ABSTRACT:
The device of the invention comprises mainly a liquid crystal screen illuminated by a light source. An electrically controlled modulating device is placed between the source and the screen. Depending on the desired illuminating intensity, the electrical signal will be adapted to the modulating device. The modulating device may comprise essentially a liquid crystal cell.

REFERENCES:
patent: 3750136 (1973-07-01), Roess
patent: 4222641 (1980-09-01), Stolov
patent: 4349817 (1982-09-01), Hoffman et al.
patent: 4460248 (1984-07-01), Shirai
patent: 4516834 (1985-05-01), Cascini
Patents Abstracts of Japan, vol. 7, No. 113 (P-197) [1258], 18 May 1983 & JP A-58 35 425 (Canon K.K.) 02-03-1983.
Patents Abstracts of Japan, vol. 8, No. 89 (P-270) [1526], 24 Apr. 1984; & JP-A-59 3420 (Shin Nippon Denki K.K.).
Patents Abstracts of Japan, vol. 6, No. 59 (P-110) [937], 16 Apr. 1982; & JP-A-59 610 (Hitachi Seisakusho K.K.).

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