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:
Feb. 22, 2005
Filed:
Jul. 31, 2003
Hiroshi Hamano, Hachioji, JP;
Masumi Taninaka, Hachioji, JP;
Masaharu Nobori, Hachioji, JP;
Masumi Koizumi, Hachioji, JP;
Hiroshi Hamano, Hachioji, JP;
Masumi Taninaka, Hachioji, JP;
Masaharu Nobori, Hachioji, JP;
Masumi Koizumi, Hachioji, JP;
Oki Data Corporation, Tokyo, JP;
Abstract
A light-emitting-element array has a semiconductor layer formed on a current-blocking layer. Light-emitting elements are formed in the semiconductor layer by diffusion of an impurity of a different conductive type. An isolation trench divides the semiconductor layer into a first region and a remaining region, and divides the array of light-emitting elements into segments disposed alternately in these two regions, each segment preferably including one or two light-emitting elements. A first shared interconnecting pad is electrically coupled to the light-emitting elements in the first region by electrical paths not crossing the isolation trench. A second shared interconnecting pad is electrically coupled to light-emitting elements in the remaining semiconductor region by electrical paths crossing the isolation trench. The array can then be driven by a number of separate interconnecting pads equal to half the number of the light-emitting elements.