Title:
OPTICAL MEMBER AND BACKLIGHT UNIT USING SAID OPTICAL MEMBER, AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/193895
Kind Code:
A1
Abstract:
Provided is an optical member having excellent luminance uniformity. This optical member comprises: a light guide plate having an end surface onto which light from a light source is incident, an emission surface from which the incident light is emitted, and a light extraction pattern disposed on a surface opposite to the emission surface; and a reflection plate adhered to the light guide plate with a double-sided adhesive film therebetween. The double-sided adhesive film includes, in order from the light guide plate-side, a first adhesive layer, a low refractive index layer, and a second adhesive layer. In this optical member, the outer edge of the light guide plate is positioned further outside than the outer edge of the double-sided adhesive film, and the outer edge of the double-sided adhesive film is positioned further outside than the outer edge of the light extraction pattern.
Inventors:
YOSHIKAWA TAKAHIRO (JP)
HATTORI DAISUKE (JP)
MORISHIMA RYOTA (JP)
KISHI ATSUSHI (JP)
HATTORI DAISUKE (JP)
MORISHIMA RYOTA (JP)
KISHI ATSUSHI (JP)
Application Number:
PCT/JP2021/012770
Publication Date:
September 30, 2021
Filing Date:
March 26, 2021
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
F21S2/00; C09J7/38; F21V9/40; F21V17/00; G02F1/13357; F21Y103/00; F21Y115/10
Domestic Patent References:
| WO2016031397A1 | 2016-03-03 | |||
| WO2004113966A1 | 2004-12-29 | |||
| WO2019151073A1 | 2019-08-08 |
Foreign References:
| JP2018124409A | 2018-08-09 | |||
| JP2013254183A | 2013-12-19 | |||
| JP2012189802A | 2012-10-04 | |||
| JP2001188104A | 2001-07-10 | |||
| JP4140736B2 | 2008-08-27 | |||
| JP2016190996A | 2016-11-10 |
Other References:
See also references of EP 4130547A4
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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