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:
Nov. 06, 2012
Filed:
Oct. 09, 2007
Hyoung-rae Kim, Hwasung, KR;
Hyoung-Rae Kim, Hwasung, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
An apparatus for generating a VCOM voltage in a display device includes first and second buffer amplifiers and a charge pump. The first buffer amplifier is biased with high and low rail voltages for generating the VCOM voltage. The second buffer amplifier generates the high rail voltage at an output node not connected to an external capacitor. The charge pump generates the low rail voltage by charge pumping directly from an external power supply voltage. Alternatively, a charge pump and a comparator are used for generating the VCOM voltage at an output of the charge pump. The comparator generates a charge pump control signal from comparing the VCOM voltage with a reference voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile