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. 26, 2014
Filed:
Aug. 17, 2011
Norihiko Satani, Miyazaki, JP;
Norihiko Satani, Miyazaki, JP;
Lapis Semiconductor Co., Ltd., Yokohama, JP;
Abstract
A drive device drives a display panel through alternately applying a positive polarity gradation voltage and a negative polarity gradation voltage to the display panel. The drive device includes an amplifier unit for amplifying a voltage applied to an input to obtain an amplified gradation voltage, and a voltage generation unit for generating the positive polarity gradation voltage and the negative polarity gradation voltage according to the amplified gradation voltage. The amplifier unit selects one of the positive polarity gradation voltage and the negative polarity gradation voltage immediately before the amplifier unit switches a gradation reference voltage. The selected gradation voltage has a polarity the same as that of the gradation reference voltage to be applied to the input line after the amplifier unit switches the gradation reference voltage.