Title:
LIGHT DIFFUSION FILM LAMINATE FOR REFLECTIVE DISPLAY DEVICE, AND REFLECTIVE DISPLAY DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2023/140106
Kind Code:
A1
Abstract:
Provided are: a light diffusion film laminate for a reflective display device, the laminate having outstanding reflection luminance and being such that interference fringes do not readily occur therein; and a reflective display device using the same. A certain aspect of the present invention is a light diffusion film laminate for a reflective display device, the laminate having diffusion properties that vary depending on the incident angle of light, and being provided with at least an anisotropic light diffusion layer having a straight-line transmittance which varies depending on the incident angle of light, and an isotropic light diffusion layer provided to one face side of the anisotropic light diffusion layer. The anisotropic light diffusion layer has, in the interior thereof, a matrix region and a columnar region constituted by a plurality of columnar structures. The columnar structures of the anisotropic light diffusion layer are configured so as to be oriented from one surface of the anisotropic light diffusion layer to another surface thereof. The aspect ratio, which is the ratio of average major axis length to average minor axis length of the columnar structures, is 2-45. Additionally, the haze value of the isotropic light diffusion layer is 10% or more and less than 30%.
Inventors:
SAKANO TSUBASA (JP)
KATO MASAO (JP)
KATO MASAO (JP)
Application Number:
PCT/JP2023/000028
Publication Date:
July 27, 2023
Filing Date:
January 04, 2023
Export Citation:
Assignee:
TOMOEGAWA CO LTD (JP)
International Classes:
G02B5/02; G09F9/00
Domestic Patent References:
| WO2020066312A1 | 2020-04-02 | |||
| WO2009016975A1 | 2009-02-05 |
Foreign References:
| JP2006138938A | 2006-06-01 | |||
| JP2010237338A | 2010-10-21 | |||
| JP2002540445A | 2002-11-26 | |||
| US20170090241A1 | 2017-03-30 |
Attorney, Agent or Firm:
ITOH, Atsushi et al. (JP)
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