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:
Jun. 05, 2012
Filed:
May. 28, 2009
Applicants:
Wei Guo, Shenzhen, CN;
Sha Feng, Shenzhen, CN;
Assignee:
Chimei Innolux Corporation, Miaoli County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/26 (2006.01); G01R 31/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A test circuit for an electronic device including a liquid crystal display (LCD) device. The LCD device includes a pulse width modulator (PWM) to provide voltages to a display panel of the LCD device, a plurality of feedback circuits to output feedback voltages to the PWM, and a power supply to provide an operating voltage for the PWM. When the electronic device is in a test mode, the feedback circuits respectively decrease the feedback voltages, such that the PWM increases the voltages output to the display panel according to the feedback voltages, the increased voltages reach predetermined test voltages and test the electronic device.