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. 09, 2004
Filed:
Nov. 30, 2001
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An electroluminescent phosphor includes a phosphor powder that has zinc sulfide as a phosphor host. The phosphor powder has an average particle size, which is expressed by a D(50) value, in the range of 10 &mgr;m or more and 20 &mgr;m or less. In addition, the phosphor powder has a particle size distribution, in which coarser particle component, of which particle size is 31 &mgr;m or more, is 15% by mass or less. An electroluminescent element includes a luminescent layer that includes such electroluminescent phosphor, and of which particle density is heightened on the basis of the average particle size and the particle size distribution of the phosphor powder. A transparent electrode layer is integrally disposed to face one main surface of the luminescent layer, and a rear electrode layer is integrally disposed through a reflective insulating layer on the other main surface. According to such electroluminescent element, brightness may be improved.