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:
Sep. 16, 2014
Filed:
Feb. 21, 2012
Satoko Kato, Yokosuka, JP;
Satoko Kato, Yokosuka, JP;
Toshiba Lighting & Technology Corporation, Yokosuka-shi, Kanagawa-ken, JP;
Abstract
A mercury-free metal halide lamp for a vehicle according to an embodiment includes an airtight vesselprovided with a light-emitting partwith a discharge spaceinside, a metal halideand a rare gas sealed in the discharge space, and a pair of electrodesdisposed so that the tip ends of the respective electrodesface each other in the discharge space. The electrodesand the discharge spacedo not contain thorium. When an electric power supplied to the lamp during a stable lighting period is represented by P (W), a value obtained by adding up the electric power supplied to the lamp during a period between 1 second and 40 seconds after the startup of the lamp is represented by W(W), and the diameter of the electrodesis represented by D (mm), P (W) satisfies 20≦P≦30 and W/D (W/mm) satisfies 4300≦W/D≦7400.