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Patent Searching and Data


Title:
PEEKING PREVENTION SYSTEM, PEEKING PREVENTION METHOD, AND WINDOW MEMBER
Document Type and Number:
WIPO Patent Application WO/2021/200722
Kind Code:
A1
Abstract:
A peeking prevention system has: a display device having, on a front surface of a display screen, a first polarization layer that has a first absorption axis parallel to a first direction; and a room partition that partitions a space in which a display is provided by the display device from a surrounding space, the room partition having a translucent part that makes it possible to see into the space, the translucent part including a transparent substrate and a second polarization layer that is positioned on the space side of the transparent substrate and that has a second absorption axis parallel to a second direction, wherein: the system furthermore has a phase contrast film that is positioned on the front surface of the first polarization layer, or on the space side of the second polarization layer; the phase contrast layer has a delay axis parallel to a third direction that is orthogonal to the first direction or parallel to the second direction; and transparency is reduced when the display screen is viewed through the translucent part from an oblique angle for which the azimuth angle of the display screen is 45° and the angle of elevation is 45°.

Inventors:
TAKEMOTO HIROYUKI (JP)
YAGINUMA HIRONORI (JP)
YAEGASHI MASAHIRO (JP)
Application Number:
PCT/JP2021/013051
Publication Date:
October 07, 2021
Filing Date:
March 26, 2021
Export Citation:
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Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; G02B27/28; G02F1/1335; G02F1/13363
Attorney, Agent or Firm:
OKUDA Seiji (JP)
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