Multilayer structure, method of manufacturing multilayer structure, and image display device
US10401993B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2017 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Jan 20, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04103
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.