Title:
OPTICAL SHEET AND BACKLIGHT UNIT
Document Type and Number:
WIPO Patent Application WO/2018/164088
Kind Code:
A1
Abstract:
The present invention addresses a problem of providing: an optical sheet which can suppress damage to a light guide plate while suppressing the occurrence of wet-out between the optical sheet and the light guide plate even when the optical sheet is used for a long time; and a backlight unit. The problem is solved by an optical sheet (1) in which a plurality of unit prisms (13) are disposed in parallel with each other, the elastic modulus of the unit prisms (13) is within a range of 0.5 MPa to 10 MPa, and the height h of a ridge (14) of the unit prisms (13) varies along a direction (X) in which the ridge (14) extends or is different for unit prisms (13,13) adjacent to each other. The backlight unit (30) includes at least an optical sheet (1), a light guide plate (32), and a light source (34), and the unit prisms (13) constituting the optical sheet (1) are disposed facing the surface of the light guide plate (32).
Inventors:
TSUJI TAKAHIRO (JP)
Application Number:
PCT/JP2018/008453
Publication Date:
September 13, 2018
Filing Date:
March 06, 2018
Export Citation:
Assignee:
KEIWA INC (JP)
International Classes:
F21S2/00; F21V5/00; G02B5/02; G02F1/13357; F21Y101/00; F21Y103/00; F21Y115/10
Foreign References:
| JP2012047912A | 2012-03-08 | |||
| JP2009080497A | 2009-04-16 | |||
| JP2011064986A | 2011-03-31 | |||
| JP2015064581A | 2015-04-09 | |||
| JP2016177903A | 2016-10-06 |
Attorney, Agent or Firm:
YOSHIMURA, Shunichi (JP)
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