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. 14, 2016
Filed:
Jun. 06, 2013
Noboru Kusunose, Kanagawa, JP;
Noboru Kusunose, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A straight tube LED lamp includes a substrate on which semiconductor light-emitting elements are mounted in longitudinal direction, a long metal chassis with a semi-circular cross section, to mount the substrate in a chord portion of the semi-circle, a resin sheet interposed between the chassis and the substrate, a translucent element contacting the chassis to form a circle, made from a resin or glass through which light beams from semiconductor light-emitting elements are transmitted, cap elements to cover both ends of the chassis and the translucent element and connectable to a lamp fitting, and a power supply board on which an electronic component for AC-DC conversion to supply current to the semiconductor light-emitting elements is mounted, contained in the chassis. The resin sheet is made from different materials at least at an overlapping portion and a non-overlapping portion of the power supply board and the substrate in longitudinal direction.