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:
Jan. 25, 2022
Filed:
Apr. 02, 2020
Meas France, Toulouse, FR;
David Mirassou, Toulouse, FR;
MEAS FRANCE, Toulouse, FR;
Abstract
An optical rain sensor device includes a first light emitting element adapted to emit a first light pulse toward an inner surface of a transparent substrate, a second light emitting element adapted to emit a second light pulse toward the inner surface of the transparent substrate, a photodetector adapted to detect a light from the first light pulse and the second light pulse that is reflected by the inner surface of the transparent substrate, and a rain sensor controller. The rain sensor controller includes a regulated current source adapted to apply a compensation current signal at a terminal of the second light emitting element based on a regulation signal, so that a total current across the second light emitting element is increased or decreased to reduce an imbalance between the first light pulse and the second light pulse.