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:
Aug. 21, 2012
Filed:
Jul. 30, 2008
Somei Kawasaki, Saitama, JP;
Fujio Kawano, Kawasaki, JP;
Somei Kawasaki, Saitama, JP;
Fujio Kawano, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An active matrix display apparatus includes two-dimensionally arranged pixel circuits, each of which includes a display element, and a plurality of signal lines and scanning lines connected to the pixel circuits. Each of the pixel circuits include a drive transistor and a capacitor, with one terminal of the capacitor being connected to a control terminal of the drive transistor and a second terminal of the capacitor being connected to a first main conductive terminal of the drive transistor and a lighting power source. In a writing operation period, a current flowing to the signal line is conducted into the drive transistor, and in a lighting operation period, a current conducting in the drive transistor is injected into the display element. At a time during the writing operation period, a potential of the lighting power source is changed toward a potential of the signal line to depress the current conducting in the drive transistor and is kept for a period, during which the current conducting in the drive transistor partially recovers from the depression. After the writing operation period, the potential of the lighting power source is restored.