Title:
LIGHTING DEVICE AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/070442
Kind Code:
A1
Abstract:
A lighting device (3) is provided with a plurality of light sources (4) and a light guide plate (6) wherein the light guide plate (6) has a light entering surface (6a) where light from the light sources (4) enters and an exit surface (6b) where light exits on the side toward an object to be irradiated. A patterned part (30) for which patterning for altering the propagation direction of light has been implemented is provided on the exit surface (6b) or the surface (6c) on the opposite side thereto. A distance (L) between an end part of the patterned part (30) and the light sources (4) and a distance (p) between adjacent light sources satisfy the relationship: p/L <= 2.0. Thus, occurrences of variations in brightness are prevented while suppressing reductions in the brightness of the illuminating light in the lighting device.
Inventors:
NAKAMURA MAYUMI
Application Number:
PCT/JP2011/076376
Publication Date:
May 31, 2012
Filing Date:
November 16, 2011
Export Citation:
Assignee:
SHARP KK (JP)
NAKAMURA MAYUMI
NAKAMURA MAYUMI
International Classes:
F21S2/00; G02F1/13357; F21Y101/02
Foreign References:
| JP2010251026A | 2010-11-04 | |||
| JP2010153103A | 2010-07-08 |
Attorney, Agent or Firm:
IKEUCHI SATO & PARTNER PATENT ATTORNEYS (JP)
Patent business corporation Ikeuchi and Sato and partners (JP)
Patent business corporation Ikeuchi and Sato and partners (JP)
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