- 专利标题: Laminated body and manufacturing method thereof, light guide plate unit, light source unit, display device, projection image display member, projection image display device, and display screen filter
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申请号: US17441993申请日: 2020-03-17
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公开(公告)号: US12117641B2公开(公告)日: 2024-10-15
- 发明人: Yuji Matsuo , Takayuki Uto , Miyu Shiraishi
- 申请人: Toray Industries, Inc.
- 申请人地址: JP Tokyo
- 专利权人: Toray Industries, Inc.
- 当前专利权人: Toray Industries, Inc.
- 当前专利权人地址: JP Tokyo
- 代理机构: Buchanan Ingersoll & Rooney PC
- 优先权: JP 19058129 2019.03.26 JP 19206891 2019.11.15
- 国际申请: PCT/JP2020/011683 2020.03.17
- 国际公布: WO2020/196090A 2020.10.01
- 进入国家日期: 2021-09-22
- 主分类号: G02B5/30
- IPC分类号: G02B5/30 ; F21V8/00 ; G02F1/1335
摘要:
Embodiments disclose an optical material having a visual confirmation effect due to higher directivity of light reflection than a conventional optical material. Embodiments can include a laminate having a multilayer laminated film in which 11 or more layers of different thermoplastic resins are alternately laminated. With respect to light in a wavelength range of 400 to 700 nm and that is perpendicularly incident on an outer surface of the multilayer laminated film, the laminate has an average transmittance in the above wavelength range of 50% or more. When average reflectances in a wavelength range of 400 to 700 nm with respect to S-wave light in the wavelength range, incident at angles of 20° and 70° with respect to the normal line of the outer surface of the film at azimuths ϕn (n: 1 to 5), are given as Rs20(ϕn) and Rs70(ϕn), respectively, the laminate satisfies, at least one azimuth ϕn:Rs70(ϕn)−Rs20(ϕn)≥50(%).
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