Title:
LED BULB
Document Type and Number:
Japanese Patent JP2013122863
Kind Code:
A
Abstract:
To provide an LED bulb having light distribution similar to that of a filament bulb by maximally eliminating a dark region not irradiated with light.
Front irradiation LEDs 3 emitting light forward and side irradiation LEDs 4 emitting light laterally are mounted on LED circuit boards 5 on the same plane. The LED circuit boards 5 are arranged on a base substrate 6 so that they are stood to form a triangle pole shape. Accordingly, since the dark region not irradiated with light is eliminated, light distribution similar to that of the filament bulb can be obtained.
Inventors:
MIURA JIRO
Application Number:
JP2011270979A
Publication Date:
June 20, 2013
Filing Date:
December 12, 2011
Export Citation:
Assignee:
PIAA CORP
International Classes:
F21S2/00; F21V19/00; H01L33/48; F21Y101/02
Domestic Patent References:
| JP2010055993A | 2010-03-11 | |||
| JP2010245037A | 2010-10-28 | |||
| JP3139851U | 2008-03-06 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu