Title:
The method of specifying the surface shape of an optical diffusion film and an optical diffusion film, and the recording medium which recorded the surface shape regulation program
Document Type and Number:
Japanese Patent JP5980797
Kind Code:
B2
Abstract:
The present invention is made to solve glare of an embossed matte film of a conventional product produced and sold by the applicant of the present application, and provides a light diffusion film and the like having a surface shape of an irregular pattern that significantly suppresses the glare even when an LED light source is used and also maintains the good optical characteristics. The present inventors analyzed the mechanism for solving the glare problem while maintaining good optical characteristics of the embossed matte film of the conventional product produced and sold by the applicant of the present application, and conceived the following as sufficient conditions for maintaining good optical characteristics of an embossed matte film and also for solving the glare. In order to maintain the optical characteristics, the surface shape was defined by use of an inclination angle histogram profile of an embossed surface. In order to solve the glare, the size of unit patterns which make up an entire pattern and do not cause glare was defined by use of the value of the average length RSm of the roughness curve element of the embossed surface.
Inventors:
Koide Koji
Ozawa
Fukunaga Yasutaka
Ozawa
Fukunaga Yasutaka
Application Number:
JP2013540865A
Publication Date:
August 31, 2016
Filing Date:
October 23, 2012
Export Citation:
Assignee:
Mitsubishi Gas Chemical Co., Ltd.
MGC Fill Sheet Co., Ltd.
MGC Fill Sheet Co., Ltd.
International Classes:
G02B5/02; F21V3/00; F21V3/04
Domestic Patent References:
| JP200953622A | ||||
| JP2005227407A |
Attorney, Agent or Firm:
Hiroshi Kobayashi
Taro Ushio
Kyoei Sugiyama
Yasuhito Suzuki
Taro Ushio
Kyoei Sugiyama
Yasuhito Suzuki