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:
Jun. 29, 1999
Filed:
Jul. 22, 1998
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
A wiper control apparatus of the water drop sensitive type for detecting of the amount of water or water drops adhering to or present upon the front surface of a windshield and for driving a wiper, comprising: a light emitting means for introducing light into the inside of the windshield so that the light experiences total internal reflection upon interior surfaces of the windshield; a light receiving means for receiving the light reflected within the windshield; means for turning a first output D1, a second output D2, and a third output D3 to either an H level or an L level in response to the level of a signal output from the light receiving means, the outputs being preset in sequence of height of sensitivity thereof; means for outputting a drive signal WD for the wiper when outputs D1, D2, and D3 are switched into the H level; means for maintaining the drive signal as long as the second output signal D2 is in the H level even if the third output D3 turns to the L level; and means for stopping the drive signal WD for the wiper when the second output D2 turns OFF.