Title:
DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/090315
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a display device capable of preventing a non-pixel region present between pixels of an image source from being visually recognized.
A display device 1 is characterized by being provided with: an image source 11 for emitting image light L; a lens 12 for enlarging the image light L and emitting the image light to the viewer side; and an optical sheet 20 disposed between the image source 11 and the lens 12 or on the viewer side of the lens 12, wherein the optical sheet 20 comprises at least two or more layers 21, 22, 23, a plurality of convex shapes 21a, 23a are formed at interfaces between the layers, a difference Δn in refractive index between the layers adjacent to each other satisfies 0.005≤Δn≤0.1, a half-value angle α of the optical sheet 20 satisfies 0.05°≤α≤0.2°, and a diffusion angle β of the optical sheet 20 at which a maximum brightness becomes 1/20 satisfies β≤5×α.
Inventors:
GOTO MASAHIRO (JP)
SEKIGUCHI HIROSHI (JP)
MORIOKA YU (JP)
SEKIGUCHI HIROSHI (JP)
MORIOKA YU (JP)
Application Number:
PCT/JP2016/079079
Publication Date:
June 01, 2017
Filing Date:
September 30, 2016
Export Citation:
Assignee:
DAINIPPON PRINTING CO LTD (JP)
International Classes:
G09F9/00; G02B5/02; G02B27/02; H01L51/50; H04N5/64; H05B33/02
Foreign References:
| JPH07110470A | 1995-04-25 | |||
| JP2013003272A | 2013-01-07 | |||
| JP2012255819A | 2012-12-27 | |||
| JPH05328261A | 1993-12-10 | |||
| JP2013003276A | 2013-01-07 | |||
| JP2016139112A | 2016-08-04 |
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
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