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:
Apr. 09, 2002
Filed:
Dec. 01, 1999
Hubert Lamm, Kappelrodeck, DE;
Hans Meier, Otterweier, DE;
Wolfgang Hermann, Freising, DE;
Henry Blitzke, Buehl, DE;
Guenter Haderer, Buehl, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The device for the detection of a wetting of a pane of glass, has an optical rain sensor which detects extraneous light and evaluates it for purposes of day-night detection. The amount of light striking the receiver ( ) is integrated in an integration stage ( ) and supplied to a comparator stage ( ). The total light quantity formed by the light of a transmitter ( ) and extraneous light and the extraneous light quantity detected when the transmitter ( ) is switched off are measured in separate time intervals (Tg, Tf, Tf′). The time interval (Tf, Tf′) utilized for measurement of the extraneous light quantity is to be extended after a predeterminable number of measurement cycles (M) or after a predeterminable time period and/or the threshold (S ) is to be lowered for day-night detection.