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. 05, 2011
Filed:
Feb. 06, 2009
Naoyuki Takada, Yokohama, JP;
Masaya Suzuki, Yokohama, JP;
Shinichi Sakano, Yokohama, JP;
Tomoyuki Nagahama, Yokohama, JP;
Mitsutaka Wasada, Yokohama, JP;
Takayuki Miyazawa, Yokohama, JP;
Yukihiro Handa, Yokohama, JP;
Naoyuki Takada, Yokohama, JP;
Masaya Suzuki, Yokohama, JP;
Shinichi Sakano, Yokohama, JP;
Tomoyuki Nagahama, Yokohama, JP;
Mitsutaka Wasada, Yokohama, JP;
Takayuki Miyazawa, Yokohama, JP;
Yukihiro Handa, Yokohama, JP;
Victor Company of Japan, Limited, Yokohama-shi, JP;
Abstract
An indicator device includes a light emitting element for emitting light, and a light conducting plate having a light incidence surface for conducting light from the light emitting element inside thereof and a light output surface, for a lighted indication by the light output surface. The light conducting plate has a triangular recess recessed to form with prescribed recess depths in one planer surface thereof, for light from the light emitting element to be reflected in part. The triangular recess has a recess extremity constituting a single vertex disposed in position on an optical axis of the light emitting element and nearer to the light incidence surface than other end parts thereof. The recess depths becomes shallower as the V-form recess extends from the recess extremity, allowing for an evenness of luminance of light over the light output surface formed on the light conducting plate.