Title:
OPTICAL PROPERTY CONTROL FILM AND DISPLAY DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2019/240003
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an optical property control film which is used in a peep-preventing film for a smartphone or tablet and which has an excellent visibility from the front and suppresses the occurrence of malfunctions in a touch panel caused by moisture condensation, etc. in a cold region. This optical property control film is characterized in that: a reflection layer unit is formed on a resin substrate by laminating a plurality of high-refractive-index layers and low-refractive-index layers which contain hydrophilic polymers and fine particles; the visible light transmittance (Tvis(a)) as seen in a normal direction of the optical property control film surface is 83% or higher; and the ratio of the visible light transmission (Tvis(a)) as seen in a normal direction of the optical property control film surface and the visible light transmission (Tvis(b)) as seen in a direction inclined by 60° with respect to the normal direction of the optical property control film surface satisfies relational expression (1). Relational expression (1) 1.4≤(Tvis(a))/(Tvis(b))
Inventors:
MASUDA HARUKA (JP)
Application Number:
PCT/JP2019/022496
Publication Date:
December 19, 2019
Filing Date:
June 06, 2019
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B5/28; B32B7/023; B32B27/20; B32B27/30; G02B5/26; G02F1/1335
Domestic Patent References:
| WO2013179902A1 | 2013-12-05 |
Foreign References:
| JP2016118632A | 2016-06-30 | |||
| US20170336665A1 | 2017-11-23 | |||
| JP2014142636A | 2014-08-07 | |||
| JP2013171097A | 2013-09-02 | |||
| US20130135750A1 | 2013-05-30 |
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
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