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:
Jan. 29, 2002
Filed:
Jul. 24, 1998
Akira Inoue, Nagano, JP;
Seiko Epson Corporation, , JP;
Abstract
A display device, an electronic apparatus, and a drive method are provided achieving an improved display characteristic, most suitable for a charge-discharge drive method and arranged to perform grayshade display by pulse width modulation. In a charging mode, a first selecting voltage V is supplied to a scanning line. In a discharging mode, a precharge voltage−V opposite in polarity to V is applied to the scanning line, and a second selecting voltage V opposite in polarity to the precharge voltage−V is thereafter supplied to the scanning line. Also, a pulse-width-modulated data voltage is supplied to a data line. As the pulse width of one of first and second write pulses and setting the same gray scale value is increased, the pulse width of the other is reduced and the rate of reduction of the pulse width of the other becomes lower. The DC component of the data voltage in one horizontal scanning period is made approximately zero independent of the gray scale.