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. 03, 1997
Filed:
Jun. 08, 1993
Kazutoshi Koie, Tokoname, JP;
Naoki Fukaya, Tokyo, JP;
Yasunori Kanno, Kariya, JP;
Shinji Namba, Kariya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A rear indicator device for an automobile arranged inwardly of and adjacent to a rear window. The device includes a light guide plate 2, a hologram 2 arranged in the light guide plate 2 and an irregular shaped prism having a first section having an apex angle .phi.1 at which the light beam from a light source 5 is subjected to a refraction so that the light beam is flattened. The flattened beam is again introduced into the prism at a second section which is in face to face contact with the light guide plate 2, so that the light beam is transmitted inside the light guide plate 2 toward the hologram 3, whereat the light beam is introduced into the hologram at a predetermined angle of incidence, so that a horizontal light beam of a predetermined wave length is obtained in a rear direction of the automobile to indicate the braking of the automobile.