The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 1991
Filed:
Mar. 22, 1990
Patrick J French, Yokosuka, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
The photo-sensor cell comprises two optical flip-flop sensors having two different light intensity thresholds, respectively , under imbalanced load offset conditions, two logic cells for latching only two different binary level signals from the two optical sensor respectively, without latching two of the same binary level signals from the two optical sensors due to a high or low pulsed power supply, and an output logic cell for generating an output binary signal from the time when light intensity rises beyond a higher threshold to the time when it drops below a lower threshold. Since all the elements are standardized in an IC manufacturing process and further no synchronizing clock signals are required between cells and signal processing logic owing to latch operations when a number of cells are connected in series or parallel, it is possible to realize a compact digital photo-sensor cell assembly with hysteresis activated by a pulsed power supply.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile