Title:
LED BULB
Document Type and Number:
Japanese Patent JP2015167101
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an LED bulb which does not damage uniformity of luminance of a globe surface while brightness in a top part direction and brightness in a base direction of a globe can be set substantially independently.SOLUTION: In an LED bulb 10, an annular reflection member 16 for a back surface and a cone-shaped reflection member 17 for a lateral surface are laminated with a certain space at an upper part of an LED light source 15. A beam L1 emitted from a peripheral part of the LED light source 15 obliquely upward and reflected at the reflection member 16 for a back surface heads toward a base direction. On the other hand, in a beam emitted from the LED light source 15 and trying to escape from a lower side of the reflection member 17 for a lateral surface, one part (beams L4, L5) heads obliquely upward and the other part (beam L2) is reflected at the reflection member 17 for a lateral surface and heads toward the lateral side. Furthermore, a beam L3 emitted upward from a central part of the LED light source 15 passes through a through-hole of the reflection member 17 for a lateral surface and heads upward.
Inventors:
KAYANUMA YASUAKI
Application Number:
JP2014041425A
Publication Date:
September 24, 2015
Filing Date:
March 04, 2014
Export Citation:
Assignee:
CITIZEN HOLDINGS CO LTD
CITIZEN ELECTRONICS
CITIZEN ELECTRONICS
International Classes:
F21S2/00; F21V7/00
Domestic Patent References:
| JP3169310U | 2011-07-28 | |||
| JP2013201109A | 2013-10-03 | |||
| JP2012227536A | 2012-11-15 | |||
| JPS567206U | 1981-01-22 |
Foreign References:
| DE102012211936A1 | 2014-01-09 |
Attorney, Agent or Firm:
Akira Miyajima
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