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:
Jan. 10, 2012
Filed:
Sep. 12, 2007
Reiji Hattori, Fukuoka, JP;
Reiji Hattori, Fukuoka, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A current drive apparatus for an active matrix display operates a plurality of loads, e.g. organic or inorganic EL elements, by applying a current thereto. The apparatus includes a plurality of output terminals to which the loads are respectively connected. A single current generation circuit comprising e.g. a digital to analogue converter and a current mirror, outputs an operating current having a predetermined current value. A plurality of current storage circuits are provided in accordance with the respective output terminals, sequentially sample and hold the operating current and then simultaneously output the drive currents based on the sampled operating currents to the respective output terminals. The operating current has a current value according to an input signal. The current storage circuit includes a voltage component holding section which samples the operating current outputted from the current generation circuit and holds a voltage component for driving a drive control current corresponding to a current value of the operating current for driving a second current mirror.