Title:
LIGHT DIFFUSION FILM LAMINATE FOR REFLECTIVE DISPLAY DEVICE, AND REFLECTIVE DISPLAY DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/203643
Kind Code:
A1
Abstract:
[Problem] To provide a light diffusion film laminate for a reflective display device having excellent display quality, the light diffusion film laminate being capable of improving the intensity of reflected light at various outside light incidence angles in the viewing-side front direction to thereby improve visibility. [Solution] This light diffusion film laminate for a reflective display device has diffuseness that changes according to a light incidence angle. The light diffusion film laminate is characterized by comprising at least an anisotropic light diffusion layer which has linear transmittance that changes according to the light incidence angle, and an isotropic light diffusion layer provided on one surface side of the anisotropic light diffusion layer, wherein the anisotropic light diffusion layer has therein a matrix region and a columnar region composed of a plurality of columnar structures, the scattering central axis angle of the anisotropic light diffusion layer is less than 6° with respect to the normal direction of the anisotropic light diffusion layer, the maximum linear transmittance of the anisotropic light diffusion layer is 15-85% inclusive, the maximum linear transmittance of the isotropic light diffusion layer is 35% or less, and the maximum linear transmittance of the light diffusion film laminate for a reflective display device is 10% or less.
Inventors:
KATO MASAO (JP)
Application Number:
PCT/JP2020/013660
Publication Date:
October 08, 2020
Filing Date:
March 26, 2020
Export Citation:
Assignee:
TOMOEGAWA CO LTD (JP)
International Classes:
G02B5/02; G02F1/1335; G09F9/00
Domestic Patent References:
| WO2018051700A1 | 2018-03-22 | |||
| WO2014084361A1 | 2014-06-05 |
Foreign References:
| JP2012141593A | 2012-07-26 | |||
| JP2002214409A | 2002-07-31 | |||
| JP2002122714A | 2002-04-26 |
Attorney, Agent or Firm:
ITOH, Atsushi (JP)
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