Display device
US11314138B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2021 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Jan 27, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/48
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a display device including a display panel having a display surface, a polarizer disposed on the display surface, a first phase retardation layer disposed on one side of the polarizer opposite to the display surface, a polymerized cholesteric material layer disposed on one side of the first phase retardation layer opposite to the display surface, a second phase retardation layer disposed on one side of the polymerized cholesteric material layer opposite to the display surface, and a switchable polarizer disposed on one side of the second phase retardation layer opposite to the display surface. A first optical axis of the first phase retardation layer is orthogonal to a second optical axis of the second phase retardation layer. A first absorption axis of the polarizer is in the same direction as a second absorption axis of the switchable polarizer. The polarity of the switchable polarizer can be turned on or off according to a display state or a non-display state of the display panel, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.