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. 03, 2004
Filed:
Dec. 15, 2000
Akira Inoue, Shiojiri, JP;
Suguru Yamazaki, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
It is to manage both the reduction of power consumption and the enhancement of quality of picture when a partial display operation is performed. A scanning line driving circuit supplies each of scanning lines in a display region with selection signals in a second half part of one horizontal scanning time period and with non-selection signals in the rest thereof by inverting the polarity every vertical scanning time period. Further, the scanning line driving circuit supplies each of scanning lines in a non-display region with non-selection signals by inverting the polarity every one or more vertical scanning time periods. A data line driving circuit supplies each of data lines with a signal representing a positive-side voltage level VDP and a signal representing a negative-side voltage level VDN in first and second half parts of a horizontal scanning time period, respectively, for a period of time of the same length in the case that a scanning line in a display region is selected. Furthermore, the data line driving circuit supplies each of data lines alternately with a signal representing the positive-side voltage level VDP and a signal representing the negative-side voltage level VDN every one or more horizontal scanning time period.