发明申请
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
- 专利标题： LIGHT-EMITTING DEVICE, LIGHT BULB SHAPED LAMP AND LIGHTING APPARATUS
- 专利标题（中）： 发光装置，灯泡形灯和照明装置
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申请号： US13393397申请日： 2011-09-20
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公开(公告)号： US20120256538A1公开(公告)日： 2012-10-11
- 发明人: Nobuyoshi Takeuchi , Tsugihiro Matsuda , Hideo Nagai , Masahiro Miki , Takaari Uemoto
- 申请人： Nobuyoshi Takeuchi , Tsugihiro Matsuda , Hideo Nagai , Masahiro Miki , Takaari Uemoto
- 申请人地址： JP Osaka
- 专利权人： PANASONIC CORPORATION
- 当前专利权人： PANASONIC CORPORATION
- 当前专利权人地址： JP Osaka
- 优先权： JP2010-247953 20101104
- 国际申请： PCT/JP2011/005279 WO 20110920
- 主分类号： H01L33/62
- IPC分类号： H01L33/62 ; H01L33/48
摘要：
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.
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