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. 17, 2012
Filed:
Jul. 16, 2009
Yutaka Saeki, Kanagawa, JP;
Yutaka Saeki, Kanagawa, JP;
Renesas Electronics Corporation, Kawasaki-shi, Kanagawa, JP;
Abstract
In current driving circuit a desired value of a driving current is promptly written in a load of each pixel despite load variations that may occur in each pixel. A constant current source circuit delivers a driving current Idata to a load. An output voltage difference amplifier circuit detects a voltage change produced at a load driving end within a preset time period, and delivers a current or a voltage corresponding to the voltage change during a time period different from the preset time period. The output voltage difference amplifier circuit temporally repeats detection of the voltage change and delivery of the current or the voltage to the load.