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:
Jun. 26, 2001
Filed:
Dec. 23, 1998
Genta Koizumi, Ibaraki, JP;
Katsuhiko Sakai, Ibaraki, JP;
Hiroshi Mabuchi, Ibaraki, JP;
Mitsuru Yamazaki, Kanagawa, JP;
Seiichi Kurihara, Kanagawa, JP;
Yuji Abe, Kanagawa, JP;
Other;
Abstract
A contact layer having a low resistance in an LED is extended from an inside edge of a light take-out region in a light emitting dot to a central position thereof, whereby an input current in the light take-out region expands, while an electrode is extended from an inside edge of the light take-out region to the center of the light take-out region so as to shape like substantially a letter T with a length which is not over the center, whereby increase in an electrode covering ratio in the light take-out region can be suppressed. As a result, a uniform light output in the light take-out region can be attained, so that a light output can be remarkably improved. When electrodes in the light take-out regions in adjacent light emitting dots are staggered relative to the direction perpendicular to an aligned direction of the light take-out region (a reference straight line), the light take-out regions are arranged horizontally in substantially a straight line, so that a light emitting pattern in the aligned direction of the light take-out regions are not so staggered. Thus, an LED array having a high output and a uniform distribution of light intensity is provided.