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, 2007
Filed:
May. 19, 2004
Der-yuan Tseng, Taoyuan County, TW;
Chih-hsin Hsu, Hsinchu, TW;
Der-Yuan Tseng, Taoyuan County, TW;
Chih-Hsin Hsu, Hsinchu, TW;
Novatek Microelectronics Corp., Hsinchu, TW;
Abstract
A low-power-consumption source driver for a liquid crystal display is provided. More than one middle voltage level for the level shifter and the output buffer is provided, in addition to the power supply voltage level VDD and the ground level GND, to provide different voltage levels for image data of different polarities. Hence, amplitude of the operational voltage of the level shifters and the analog circuits with different polarities can be reduced. It also can reduce the amplitude of the operational voltage of the level shifter and can reduce significantly the dynamic power consumption of the level shifter and the DAC. Because the voltage amplitude of the circuit is reduced and a low-voltage tolerated device can be used, so that the present invention can further reduce the cost of the circuit.