Invention Grant
- Patent Title: Multilayer structure, method of manufacturing multilayer structure, and image display device
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Application No.: US15813003Application Date: 2017-11-14
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Publication No.: US10401993B2Publication Date: 2019-09-03
- Inventor: Yoshifumi Masumoto , Kiyoshi Kobayashi , Masayoshi Takeuchi
- Applicant: Alps Alpine Co., Ltd.
- Applicant Address: JP Tokyo
- Assignee: Alps Alpine Co., Ltd.
- Current Assignee: Alps Alpine Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Beyer Law Group LLP
- Priority: JP2015-148750 20150728
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G02B5/30 ; G02F1/1333 ; H01L27/32 ; H01L51/52 ; G02F1/13363 ; G06F3/044

Abstract:
A multilayer structure includes a touch sensor and an optical functional layer, the touch sensor including a base member and a transparent electrode layer. The optical functional layer includes a phase-difference layer that gives a phase difference to transmitted light (a specific example of the phase-difference layer is a multilayer configuration formed of a ¼λ phase-difference layer and a ½λ phase-difference layer), and a linear polarizing layer. The optical functional layer is positioned such that a surface thereof on the side on which the phase-difference layer is present faces the touch sensor. In the optical functional layer, the ratio of a retardation at a wavelength of 450 nm to a retardation at a wavelength of 590 nm is less than 0.763, and the slow axis of the base member extends in a direction parallel to the slow axis of the optical functional layer.
Public/Granted literature
- US20180067574A1 MULTILAYER STRUCTURE, METHOD OF MANUFACTURING MULTILAYER STRUCTURE, AND IMAGE DISPLAY DEVICE Public/Granted day:2018-03-08
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