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. 11, 1985
Filed:
May. 21, 1982
Applicant:
Inventors:
Kazuhiro Takahara, Kawasaki, JP;
Keizo Kurahashi, Sagamihara, JP;
Hiroyuki Gondo, Kobe, JP;
Kenichi Oki, Takarazuka, JP;
Shoshin Miura, Kobe, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340781 ; 307318 ; 357 13 ; 340719 ;
Abstract
A thin-film EL display device incorporates a MOS active matrix. Each of the MOS transistor arrays is additionally provided in parallel with a Zener diode for the purpose of protecting the device from a high voltage. This Zener diode has a breakdown voltage characteristic corresponding to a difference between a luminous voltage and a non-luminous voltage of an EL display element and clamps the voltage across the MOS transistor, in the 'OFF' state, to a voltage less than or equal to non-recoverable breakdown voltage.