Title:
OPTICAL FILM, ILLUMINACTION DEVICE, AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/043219
Kind Code:
A1
Abstract:
Provided are an optical film having at least two circular polarization reflecting layers and a first phase difference layer, at least one circular polarization reflecting layer being arranged on each side of the first phase difference layer, wherein the center wavelengths of the reflection regions of the circular polarization reflecting layers arranged on each side of the first phase difference layer respectively differ, and when light impinging on the optical film from one surface passes through the first phase difference layer and the circular polarization reflecting layers and exits from the other surface of the optical film, the circular polarization reflecting layer that is situated closest from the light-exiting surface of the optical film is not the circular polarization reflecting layer which has the shortest reflection region center wavelength among the circular polarization reflecting layers, and the first phase difference layer is a positive C-plate, the optical film providing improved diagonal color shift when incorporated into a liquid crystal display device; an illumination device; and an image display device.
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Inventors:
YASUDA KOTARO (JP)
Application Number:
PCT/JP2015/076281
Publication Date:
March 24, 2016
Filing Date:
September 16, 2015
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/30; G02B5/26; G02F1/1335; G02F1/13357
Foreign References:
| JP2003294948A | 2003-10-15 | |||
| JP2007286141A | 2007-11-01 | |||
| JP2005308988A | 2005-11-04 | |||
| JP2004144943A | 2004-05-20 | |||
| JP2003195038A | 2003-07-09 | |||
| JP2003222725A | 2003-08-08 | |||
| JP2012032418A | 2012-02-16 |
Attorney, Agent or Firm:
SIKs & Co. (JP)
Patent business corporation patent firm Sykes (JP)
Patent business corporation patent firm Sykes (JP)
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