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. 23, 2013
Filed:
Jun. 03, 2009
Tohru Kohno, Kokubunji, JP;
Hajime Akimoto, Kokubunji, JP;
Naruhiko Kasai, Yokohama, JP;
Masato Ishii, Tokyo, JP;
Tohru Kohno, Kokubunji, JP;
Hajime Akimoto, Kokubunji, JP;
Naruhiko Kasai, Yokohama, JP;
Masato Ishii, Tokyo, JP;
Hitachi Displays, Ltd., Chiba, JP;
Panasonic Liquid Crystal Display Co., Ltd., Hyogo-ken, JP;
Abstract
Provided is an image display device in which deterioration of a self-light-emitting element within a pixel is corrected accurately. A detection unit detects, within a detection period, a difference in characteristics between self-light-emitting elements of adjacent pixels. A first subtraction circuit outputs a differential voltage between a reference voltage and an image voltage to a self-light-emitting element that is determined by the detection unit as a deteriorated element. An amplifier amplifies an output of the first subtraction circuit with a gain [1/{1-(α/100)}]when a driver transistor is driven in a saturation region. The amplifier amplifies the output of the first subtraction circuit with a gain [1/{1-(α/100)}] when the driver transistor is driven in a linear region. A differential between the reference voltage and an output of the amplifier obtained by a second subtraction circuit is used as a corrected image voltage.