Invention Application
US20120256538A1 LIGHT-EMITTING DEVICE, LIGHT BULB SHAPED LAMP AND LIGHTING APPARATUS
审中-公开
发光装置，灯泡形灯和照明装置
- Patent Title: LIGHT-EMITTING DEVICE, LIGHT BULB SHAPED LAMP AND LIGHTING APPARATUS
- Patent Title (中): 发光装置，灯泡形灯和照明装置
-
Application No.: US13393397Application Date: 2011-09-20
-
Publication No.: US20120256538A1Publication Date: 2012-10-11
- Inventor: Nobuyoshi Takeuchi , Tsugihiro Matsuda , Hideo Nagai , Masahiro Miki , Takaari Uemoto
- Applicant: Nobuyoshi Takeuchi , Tsugihiro Matsuda , Hideo Nagai , Masahiro Miki , Takaari Uemoto
- Applicant Address: JP Osaka
- Assignee: PANASONIC CORPORATION
- Current Assignee: PANASONIC CORPORATION
- Current Assignee Address: JP Osaka
- Priority: JP2010-247953 20101104
- International Application: PCT/JP2011/005279 WO 20110920
- Main IPC: H01L33/62
- IPC: H01L33/62 ; H01L33/48
Abstract:
A light-emitting device capable of effectively dissipating heat generated at an LED is provided. The light-emitting device according to the present invention includes: a base board and an LED chip mounted on the base board. The base board is a translucent base board made of a polycrystalline ceramic. A main region of the base board includes an element mounted region on which the LED chip is mounted, and an average grain size of the polycrystalline ceramic in the main region is between 10 μm and 40 μm inclusive. An end portion region of said base board is a region around an end portion, and an average grain size of the polycrystalline ceramic in the end portion region is preferably smaller than an average grain size of the polycrystalline ceramic in the element mounted region.
Information query
IPC分类:
