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Title:
SURFACE LUMINESCENT LED DEVICE
Document Type and Number:
Japanese Patent JP2001130410
Kind Code:
A
Abstract:

To provide a LED device capable of emitting the light of a color phase similar to a bulb color of an incandescent lamp from every angle.

A reflector 42 is mounted on a LED board 33 and surrounds a LED 32 of B supported on a supporting board 34. The reflector 42 has a height reaching a straight line at a directing angle 30° of the LED 32 of B, and higher than that of the LED 32 of B. A diffusion angle is increased from a central part on a circumferential part of a diffusion board 60 corresponding to a circumferential part of a lens 50 close to arrangement surfaces of a LED 31 of Y and the LED 32 of B. That is, the diffusion angles satisfy the relationship of 60d>60c>60b>60a in each zone. Accordingly, the LED 32 of B is not observed as a point light source from the circumferential part of the lens 50.


Inventors:
AZUMA TOSHIKAZU
KOYAMA KOICHI
Application Number:
JP31834699A
Publication Date:
May 15, 2001
Filing Date:
November 09, 1999
Export Citation:
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Assignee:
KOHA CO LTD
International Classes:
B61L5/12; B61L5/18; (IPC1-7): B61L5/12
Attorney, Agent or Firm:
Tadao Hirata



 
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