Method and apparatus for erasing scattering in storage-type liqu

Details Method and apparatus for erasing scattering in storage-type liqu Method and apparatus for erasing scattering in storage-type liqu

1976-07-28

1977-09-13

Hecker, Stuart N.

Communications: electrical

Digital comparator systems

340173LT, 340324M, 350160LC, G02F 100, G11C 1142, G11C 700

Patent

active

040486281

ABSTRACT:
Methods and apparatus for erasing the stored scattering image in storage-type liquid crystal light valves. Erasure is accomplished by applying a signal from an erasing signal source across the liquid crystal cell where the signal is a voltage which is swept over the audio frequency range of 1 KHZ through 20 KHZ. In another embodiment, the erasing signal source supplies a precursor signal which has an initial frequency below the frequency threshold for scattering. This low frequency signal is maintained for a brief period of time to excite the entire liquid crystal cell into a uniform scattering state. The erasing signal is then swept over the audio frequency spectrum of 1 KHZ through 20 KHZ to cause the cell to return to the non-scattered, translucent state.

REFERENCES:
patent: 3655269 (1972-04-01), Heilmeier
patent: 3921162 (1975-11-01), Fukai et al.

Affiliated with

Also associated with

Rating

Method and apparatus for erasing scattering in storage-type liqu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for erasing scattering in storage-type liqu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for erasing scattering in storage-type liqu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-277525