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:
Nov. 21, 2000
Filed:
Feb. 20, 1998
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
An optical communication apparatus is provided that enhances the reliability of light source by extending the lifetime thereof without requiring a power supply line to generate the light signal. The light source produces light of a wide wavelength band when the system is operating. The system has a plurality of transmitting units and corresponding light receiving elements. When a switch in a particular transmitting unit is turned on, light of a specific wavelength wave-branched and reflected by a wave-separate filter is cut-off by the switch and the remaining light containing other wavelengths is transmitted to receiving units through a post-transmitting unit. In the receiving units, a light receiving element corresponding to the particular transmitting unit does not receive light of the specific wavelength when the corresponding switch is turned on. Other light receiving elements, however, receive light of a corresponding wavelength regardless of the state of the non-corresponding switch.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile