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. 08, 2007
Filed:
Apr. 14, 2003
Hideo Ochi, Tsurugashima, JP;
Masami Tsuchida, Tsurugashima, JP;
Shinichi Ishizuka, Tsurugashima, JP;
Tsuyoshi Sakamoto, Tsurugashima, JP;
Hideo Ochi, Tsurugashima, JP;
Masami Tsuchida, Tsurugashima, JP;
Shinichi Ishizuka, Tsurugashima, JP;
Tsuyoshi Sakamoto, Tsurugashima, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A drive unit which can prevent the decrease of the luminance of a self-luminous device due to degradation or a change is electric characteristic thereof. The drive unit has a semiconductor device having an electric characteristic almost the same as the that of the self-luminous device, and drives the semiconductor device in accordance with the frequency of light emission of the self-luminous device. The device generates a characteristic change detection signal indicating the degree of a change in an electric characteristic of the semiconductor device, and supplies the self-luminous device with a drive signal having a current level or a voltage level based on the characteristic change detection signal.