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. 30, 1991
Filed:
Mar. 30, 1990
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; G09G / ; G02F / ;
U.S. Cl.
CPC ...
357 2312 ; 357 237 ; 340767 ; 340793 ; 350351 ; 437 45 ;
Abstract
An apparatus for restoring a liquid crystal display element having a thin film transistor with a threshold voltage and controlling the brightness of the element includes a display driver for driving the liquid crystal display element, a picture image inspection apparatus for evaluating the brightness of the liquid crystal display element, and a thin film transistor threshold voltage adjusting device including a light source for adjusting the threshold voltage of the thin film transistor by irradiating the thin film transistor with light in response to the brightness evaluation.