Title: Bi-stable image storage apparatus

Abstract: Bi-stable image storage apparatus for storing, interrogating, and erasing two-dimensional binary images represented by arrays of light and dark areas. The storage apparatus comprises a pair of image amplifiers, preferably, inverting amplifiers, coupled together into a closed loop optical circuit such that the output of one device will be read into the other device. As long as the gain of the circuit is greater than one the circuit will drive itself to saturation and store an image optically applied thereon. The system provides a very inexpensive circuit for storing images, and can be used in a wide variety of processing and display applications.

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Inventors: O'Brien, John Augustus (Reading, MA, US)

Application Number: 520580
Filing Date: 1974-11-04
Publication_date: 1976-03-02
Assignee: Itek Corporation (Lexington, MA)
Primary Class(es): 349/1 250/214LA, 349/17, 365/108
Other Classes:
US Patent Ref:

2131185	Sep, 1938	Knoll	250/213.
3121796	Feb, 1864	Reed	250/213.
3154687	Oct, 1964	Perl et al.	250/213.

Other Refs:
Primary Examiner: Webster, Robert J.
Assistant Examiner:
Attorney: Blair; Homer O., Nathans; Robert L., Glanzman; Gerald H.