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. 22, 2001
Filed:
Jan. 08, 1999
Motohiro Kudo, Osaka, JP;
Keisuke Murakami, Osaka, JP;
Keyence Corporation, Osaka, JP;
Abstract
The structure is constituted by light-emission control means,and,, a plurality of light emitting devices,which are sequentially operated and controlled in response to light-emission-timing signals supplied from the light-emission control means,and,, a plurality of light receiving devices,forming pairs with the plural light emitting devices,so as to receive light emitted from the corresponding light emitting devices, light-receipt control means,and,for enabling light-receipt signals supplied from the plural light receiving devices,to be received in synchronization with light-emission-timing signals, voltage detection means,for detecting operation voltages which are supplied to the plural light emitting devices,and an abnormal state detection means,for detecting an abnormal operations of the plural light emitting devices in accordance with the operation voltages detected by the voltage detection means