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:
Apr. 08, 2008
Filed:
Mar. 29, 2005
Takao Inoue, Saitama, JP;
Takao Inoue, Saitama, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
It is an object of the invention to provide an improved illumination control circuit comprising a light emission element FL, a driving elementfor driving the light emission element FL, and a compensation unitare connected in series with respect to a power source voltage Vcc. Further, a reference unitfor generating a constant voltage Vz and a detecting unitare connected in series with respect to the power source voltage Vcc. The detecting unitis provided for detecting a differential voltage Vbetween the power source voltage Vcc and the constant voltage Vz. Once there is a change in the power source voltage Vcc, the detecting unitdetects a voltage change of the power source voltage Vcc in accordance with the differential voltage V, generates a detection voltage Vformed by dividing the differential voltage V, while the compensation unitgenerates a compensation voltage Vfollowing the detection voltage V, thereby inhibiting a change of a driving voltage Vx applied between two ends of the light emission element FL and the driving element, in response to a change of the power source voltage Vcc.
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