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:
May. 17, 2005
Filed:
Jan. 02, 2002
Toshinori Takahashi, Konan, JP;
Norihito Kino, Aichi-ken, JP;
Makoto Tamaki, Bisai, JP;
Tadanobu Iwasa, Ichinomiya, JP;
Hiroshi Sugihara, Ogaki, JP;
Osamu Yamanaka, Aichi-ken, JP;
Toshinori Takahashi, Konan, JP;
Norihito Kino, Aichi-ken, JP;
Makoto Tamaki, Bisai, JP;
Tadanobu Iwasa, Ichinomiya, JP;
Hiroshi Sugihara, Ogaki, JP;
Osamu Yamanaka, Aichi-ken, JP;
Toyoda Gosei Co., Ltd., Aichi-ken, JP;
Abstract
A planar light emitting device has a planar light emitter. It has a layered structure composed of a transparent body and a semi-transparent body. The transparent body is made of a transparent synthetic resin containing no light scattering material. The semi-transparent body is made of a semi-transparent synthetic resin containing a light scattering material. The transparent body and the semi-transparent body are joined to form a diffusion layer therebetween. An LED array is disposed at one side of the planar light emitter. The diffusion layer has a sea-islands structure. An island resin has a dimension of 0.1 to 50 microns. The light entering the island resin attenuates therein without reflecting at once due to its complicated shape. Namely, the light entering the diffusion layer generates uniform brightness.