LIGHT DIFFUSING FILM LAMINATE FOR REFLECTIVE DISPLAY DEVICE AND REFLECTIVE DISPLAY DEVICE USING SAME

Title:

LIGHT DIFFUSING FILM LAMINATE FOR REFLECTIVE DISPLAY DEVICE AND REFLECTIVE DISPLAY DEVICE USING SAME

Document Type and Number:

WIPO Patent Application WO/2018/051700

Kind Code:

A1

Abstract:

[Problem] To provide a light diffusing film laminate for reflective display devices and a reflective display device using the same, which can reduce a change in image brightness without degrading visibility, not only from a predetermined observation position (for example, in front of a screen) but also in a direction slightly inclined from a predetermined observation position (for example, in front of a screen), and which can also have excellent display characteristics. [Solution] This light diffusing film laminate for reflective display devices is a light diffusing film laminate which has a diffusivity that varies according to a light incident angle and transmits at least reflective light which is incident light reflected by a reflective layer, the light diffusing film laminate being characterized by being provided with at least: an anisotropic light diffusing layer having a linear transmittance that varies according to the light incident angle; and an isotropic light diffusing layer provided on one surface side of the anisotropic light diffusing layer, wherein the anisotropic light diffusing layer has therein a matrix region and a columnar region comprising a plurality of columnar structures, the scattering central axis angle of the anisotropic light diffusing layer is -5° to +5° with respect to the normal direction of the anisotropic light diffusing layer, and the anisotropic light diffusing layer and the isotropic light diffusing layer are provided in this order from the side from which the reflective light is viewed.

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Inventors:

MURATA MAKOTO (JP)
KATAGIRI HIROTO (JP)

Application Number:

PCT/JP2017/029246

Publication Date:

March 22, 2018

Filing Date:

August 14, 2017

Export Citation:

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Assignee:

TOMOEGAWA CO LTD (JP)

International Classes:

G02B5/02; B32B7/02; G02F1/1335

Foreign References:

JP4317006B2	2009-08-19
JP2012141591A	2012-07-26
JP2009150971A	2009-07-09
JP2010044319A	2010-02-25

Attorney, Agent or Firm:

ITOH, Atsushi (JP)

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