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:
Dec. 02, 2003
Filed:
Apr. 08, 2002
Masaru Tagawa, Himeji, JP;
Harumi Takeda, Osakasayama, JP;
Other;
Abstract
A light emitting block of this invention includes, mounted in a main block body ( ), solar batteries for ( ) for generating light emitting electric power, an electric double layer capacitor ( ) for storing the electric power, a planar light emitting member ( ), and a light emission control circuit for controlling lighting of the planar light emitting portion ( ). In the daytime, the solar batteries ( ) receive ambient sunlight through a block surface portion ( A). The electric power of solar batteries ( ) accumulates in the double layer capacitor ( ). At nighttime, a light emitting surface ( A) of planar light emitting portion ( ) automatically emits light with the electric power stored in the electric double layer capacitor ( ), to make the block shine. The in-system power generating function provided by the solar batteries ( ) and electric double layer capacitor ( ) simplifies construction and maintenance, and maintains light emission even in time of blackout, which provides improved response to emergency situations. The planar light emission is mellow to the eye, which provides an improvement in design.