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:
Mar. 18, 2003
Filed:
Mar. 04, 1999
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 1/749 ; H01J 6/102 ;
U.S. Cl.
CPC ...
H01J 1/749 ; H01J 6/102 ;
Abstract
Electric discharge is caused in a concave portion ( ) to generate ultraviolet light. The ultraviolet light is incident upon a fluorescent layer ( ), which emits visible light. The emitted visible light is transmitted through transparent electrodes ( ) and radiated from a surface. Because spherical materials ( ) are arranged on the inner surface of the concave portion ( ), the surface area of the fluorescent layer ( ) is enlarged, more ultraviolet light enters the fluorescent layer ( ), and the conversion efficiency from ultraviolet to visible light is enhanced.