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. 01, 1997
Filed:
Dec. 22, 1995
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
An improved flat lighting device is provided. The flat lighting device comprises a light transmission member having a luminous surface formed on the front side thereof, a reflection surface on the rear side of said luminous surface, and an incident surface, and further comprises a light source and a reflecting mirror in the vicinity of the side perpendicular to said luminous surface. The thickness of the light transmission member between the luminous surface and the reflection surface is increased wider than that of the incident surface, the lower end of said incident surface is in contact with the reflection surface, said light source and said reflecting mirror are provided closer to the center of the light transmission member inside the end of the luminous surface, said inclined surface is formed by connecting the upper end of the incident surface and the end of the luminous surface, and said inclined surface is provided with a reflection function. According to the invention, the luminous surface can be more luminous owing to reflection by the inclined surface, and the flat lighting device itself can be formed so that the area is approximately equal to the display area of a liquid crystal display for lighting.