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. 31, 2004
Filed:
Mar. 14, 2001
Applicant:
Inventors:
Manabu Kodate, Yokohama, JP;
Masato Ikeda, Shiga-ken, JP;
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/36 ;
U.S. Cl.
CPC ...
G09G 3/36 ;
Abstract
An active matrix display device has an inspection circuit for inspecting the image quality. The inspection circuit includes a plurality of input terminals for inputting a test signal and a plurality of test transistors connected respectively to the input terminals. Input test signals which are to be sent to sub pixel sections from the individual input terminals are controlled by the associated test transistors to display a desired test screen. The test transistors are preferably amorphous silicon TFTs.