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:
Mar. 08, 2011
Filed:
Nov. 15, 2006
Yukio Shakuda, Kyoto, JP;
Yukio Shakuda, Kyoto, JP;
Rohm Co., Ltd., , JP;
Abstract
A light emitting element group includes a plurality of light emitting element units connected in series. A first current limiting circuit is arranged in series with the light emitting element group, and limits a first drive current flowing from one end to the other end of the light emitting element group. A second current limiting circuit is arranged in parallel to the first current limiting circuit, and limits a second drive current flowing in an opposite direction to the first drive current in the light emitting element group. The light emitting element units are configured to include a first light emitting element and a second light emitting element; an anode of the first light emitting element and a cathode of the second light emitting element are connected, and an anode of the second light emitting element and a cathode of the first light emitting element are connected.