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:
Apr. 05, 2005
Filed:
May. 14, 2003
Applicants:
Ying-hsin LI, Kaohsiung, TW;
An Shih, Changhua, TW;
Inventors:
Ying-Hsin Li, Kaohsiung, TW;
An Shih, Changhua, TW;
Assignee:
Toppoly Optoelectronics Corp., Miao-Li County, unknown;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B001/00 ;
U.S. Cl.
CPC ...
Abstract
A source follower capable of compensating the threshold voltage is provided. The source follower comprises a current source, a switching circuit, and a thin film transistor. The source follower makes the threshold voltage of the thin film transistor constant by using the current source, and makes the input voltage nearly equal to the output voltage by using the storage capacitor and the compensating capacitor. Thus, it can make the error of the output voltage fall in the error range of the gray level voltage.