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:
Jul. 10, 2007
Filed:
May. 05, 2004
Masashi Okabe, Hyogo, JP;
Masafumi Agari, Hyogo, JP;
Hidetada Tokioka, Hyogo, JP;
Ryuichi Hashido, Hyogo, JP;
Masashi Okabe, Hyogo, JP;
Masafumi Agari, Hyogo, JP;
Hidetada Tokioka, Hyogo, JP;
Ryuichi Hashido, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A current supply circuit includes a bit select circuit selectively providing even-numbered bits or odd-numbered bits of eight bit image data, and supplies a gray-scale current corresponding to the bits provided from the bit select circuit to a pixel. In a one-frame period, a time length for supplying a current corresponding to the even-numbered bits to the light-emitting element is set twice as large as a time length for supplying a current corresponding to the odd-numbered bits. By setting 16 levels of the gray-scale current for four bits, a current-time product of a current passing through the light-emitting element during the one-frame period can be controlled to 256 levels for eight bits. Thereby, an image display device provided at each of the pixels with the light-emitting element can reduce sizes of circuits generating the gray-scale current in accordance with a digital signal.