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:
Apr. 19, 1994
Filed:
Jun. 10, 1993
Tsuneo Sekiguchi, Tokyo, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
A lighting device includes a cutout portion formed at the lower part of a reflective mirror corresponding to a part of the light beam reflected from the reflective mirror and shaded by a shading plate, a first reflective plane consisting of a left-hand reflective plane half and a right-hand reflective plane half for allowing a large part of the light beam emitted directly from the light source to converge in the vertical direction, and a second reflective plane disposed behind the first reflective plane with a vertical attitude for allowing a large part of the light beam reflected from the first reflective plane to be reflected again at the second reflective plane to converge in the vertical direction, to improve a light beam utilizing rate of a light source and light irradiating performances of a projector type lighting device, and moreover, increase a light irradiating intensity of the lighting device. To additionally increase the light irradiating intensity of the lighting device, it is desirable that a third reflective plane is disposed in the form of a concave parabolic surface at the foremost end part of a joint zone between the left-hand reflective plane half and the right-hand reflective plane half of the first reflective plane. It is also desirable that a lens having a certain amount of lens cut is disposed in the form of concave parabolic surface ahead of the first reflective plane and the second reflective plane.