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. 09, 1991
Filed:
Oct. 28, 1988
Applicant:
Inventors:
Takashi Nire, Hiratsuka, JP;
Takehito Watanabe, Isehara, JP;
Assignee:
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D / ; H01J / ; H01J / ;
U.S. Cl.
CPC ...
427 66 ; 4272552 ; 4272557 ; 427255 ; 4274191 ; 4274192 ; 4274197 ; 313509 ; 313498 ;
Abstract
The disclosure describes a thin film EL device including a luminescent layer made of column polycrystals formed by independently evaporating luminescent host material and an activator and then combining the evaporated substances on a substrate. Electrons in the luminescent layer which are accelerated by an electric field applied from the outside efficiently collide against the activator without being intercepted by interfaces between crystalline particles. The thin film EL device of the present invention can be used for display, illumination, writing, reading out, and erasure of signals of photo-recording mediums.