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. 23, 2014
Filed:
Feb. 01, 2013
Citizen Electronics Co., Ltd., Fujiyoshida-shi, Yamanashi-ken, JP;
Citizen Holdings Co., Ltd., Nishi-Tokyo-shi, Tokyo, JP;
Takakazu Yano, Tokyo, JP;
Masato Yazaki, Yamanashi-ken, JP;
Masatoshi Sasuga, Yamanashi-ken, JP;
Mitsunori Miyamoto, Nagano-ken, JP;
Citizen Electronics Co., Ltd., Yamanashi-Ken, JP;
Citizen Holdings Co., Ltd., Tokyo, JP;
Abstract
In a first aspect of the present invention, a lighting device includes a light-emitting element, a phosphor layer including a phosphor and spaced from the light-emitting element, and a light-transmitting layer with thermal conductivity that is higher than thermal conductivity of the phosphor layer, the light-transmitting layer disposed in contact with the phosphor layer. It is disclosed that the phosphor layer has first and second surfaces opposite to each other. In some embodiments, the light-transmitting layer that transmits light emitted from the light-emitting element is disposed on the first surface of the phosphor layer. It is also disclosed that the first light-transmitting layer that transmits light emitted from the light-emitting element is disposed on the first surface of the phosphor layer and a second light-transmitting layer that transmits visible light is disposed on the second surface of the phosphor layer.