Invention Grant
- Patent Title: Elliptical polarization plate
- Patent Title (中): 椭圆偏振板
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Application No.: US14454288Application Date: 2014-08-07
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Publication No.: US09383492B2Publication Date: 2016-07-05
- Inventor: Nobuyuki Hatanaka , Akira Yokota , Tadahiro Kobayashi , Mitsutaka Sase , Yoshifumi Komatsu
- Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
- Applicant Address: JP Tokyo
- Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
- Current Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2013-165945 20130809; JP2013-187059 20130910; JP2014-017303 20140131
- Main IPC: G02B5/30
- IPC: G02B5/30 ; H01L51/52

Abstract:
To provide an elliptical polarization plate excellent in suppression of coloration and light leakage in display. An elliptical polarization plate having a transparent protective film pasted to one surface of a polarizer and an optically anisotropic film pasted to the other surface thereof, wherein, when measured under condition of incident polarization in the film normal direction from the side of the transparent protective film, the visibility corrected single body transmittance is 43.0% or more, the visibility corrected polarization degree is 95.0% or more, the single body hue value a* is −2.0 to 1.0 and the single body hue value b* is −1.0 to 5.0, and the optically anisotropic film satisfies the formulae (1), (2) and (3): Re(450)/Re(550)≦1.00 (1) 1.00≦Re(650)/Re(550) (2) 100
Public/Granted literature
- US20150042942A1 ELLIPTICAL POLARIZATION PLATE Public/Granted day:2015-02-12
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