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:
Dec. 04, 1990
Filed:
Sep. 28, 1988
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
An LED includes a semiconductor substrate, a first blocking layer formed on this semiconductor substrate, a second blocking layer formed on this first blocking layer, a first V-channel extending from the second blocking layer to the semiconductor substrate, and a stripe-geometry light-emitting region formed in the first V-channel. Light is emitted from the LED from one edge of the light-emitting region due to a flow of current in the light-emitting region, to which the current is confined by the blocking layers. The LED also comprises a second V-channel disposed at a certain distance from the other edge of the light-emitting region, on the optical path of the light emitted from this other edge, and an absorbing region is formed in the second V-channel. This absorbing region absorbs the light emitted from the other edge of the light-emitting region. The LED has excellent characteristics in which a stable output of spontaneously-emitted light can be obtained under a wide variety of operating conditions.