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:
Oct. 31, 2000
Filed:
Feb. 13, 1997
Fumihiko Kato, Tokyo, JP;
Nec Corporation, Tokyo, JP;
Abstract
An image signal control circuit including a digital-to-analog conversion circuit with a first reference voltage terminal to be supplied with a predetermined voltage value, and second and third reference voltage terminals to be supplied with gradation voltage values The digital-to-analog conversion circuit also has a switching unit for outputting one value of gradated analog gradation data obtained by the division of the gradation voltage, a control circuit for selectively operating the switching unit based on digital image data, sample hold input clock and frame input clock, so as to switch the polarity of an output signal of the digital-to-analog conversion circuit at every frame period.