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:
Oct. 04, 1994
Filed:
Oct. 30, 1991
Jae H Ryu, Seoul, KR;
Goldstar Co., Ltd., Seoul, KR;
Abstract
Disclosed is a thin film electroluminescent device of this invention comprising a transparent substrate, a transparent electrode, a fluorescent layer emitting a light when being charged with a certain voltage, a first and second insulating layer being laminated on the top and the bottom of the fluorescent layer to make a dopant be excited and emit a light efficiently, a first light absorbing layer being laminated on the second insulating layer to improve the function of contrast of the device of electroluminescence, a rear electrode formed on the first light absorbing layer at regular intervals, a rear insulating layer being laminated on the rear electrode to prevent the current from leaking from the rear electrode, and a second light absorbing layer being laminated on the rear insulating layer to blacken the etched portion of the first light absorbing layer. A method of fabrication is also disclosed.