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:
May. 29, 2001
Filed:
Dec. 16, 1998
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
A wiper controller apparatus of the water drop sensitive type comprises: light emitting means,for guiding light into a window glass so as to undergo total internal reflection within said window glass; light receiving means,for receiving the light which has undergone total internal reflection within said window glass; means for detecting the amount of water drops adhered or present upon an outside surface of said window glass based on an output of said light receiving means, and for driving a wiper thereupon; wherein the apparatus further comprises wiper driving means,for driving the wiper again by only one cycle if a time interval from an initiation of said wiper action exceeds a predetermined time. The apparatus further comprises anther wiper driving means,for driving said wiper when the signal duration time of the output signal S,of said light receiving means,is equal to or greater than a predetermined time.