Title:
PLANAR LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/058045
Kind Code:
A1
Abstract:
A planar lighting device in which workability for placement of a heat conduction
agent is improved and in which heat produced from a point-like light source is
efficiently released to achieve high brightness. A double-sided flexible printed
circuit board (10) of the planar lighting device (1) has a recess (23) formed at
a portion of the surface where the point-like light source (3) is mounted. A bottom
surface (22) of the recess (23) has a conductor pattern (7R) on the opposite side
(10R) of that side (10F) of the double-sided flexible printed circuit board (10)
on which the point-like light source is mounted. Heat conduction resin (11) is
placed in a space formed by the recess (23) and a mounting surface (3b) of the point-like
light source (3). Preferably, the double-sided flexible printed circuit board
(10) is attached to a heat radiation plate (5a) with a heat conduction tape (12)
in between them.
Inventors:
OHNO YASUO (JP)
Application Number:
PCT/JP2006/320776
Publication Date:
May 24, 2007
Filing Date:
October 18, 2006
Export Citation:
Assignee:
MINEBEA CO LTD (JP)
OHNO YASUO (JP)
OHNO YASUO (JP)
International Classes:
F21V8/00; F21V29/00; G02F1/13357; H01L33/62; H01L33/64; F21Y101/02
Foreign References:
| JP2003281924A | 2003-10-03 | |||
| JPH08125227A | 1996-05-17 | |||
| JP2005064047A | 2005-03-10 | |||
| JP2002353515A | 2002-12-06 | |||
| JP2005276950A | 2005-10-06 | |||
| JP2005051088A | 2005-02-24 |
Attorney, Agent or Firm:
HANABUSA, Tsuneo et al. (Shin-Ochanomizu UrbanTrinity 2, Kandasurugadai 3-chom, Chiyodaku Tokyo 62, JP)
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