Viewing angle switch module and display apparatus
US11320680B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2020 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Mar 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133757
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A viewing angle switch module including a viewing angle limiting device and a first electrically controlled viewing angle switch device is provided. A plurality of first block walls of the viewing angle limiting device are arranged along a first direction and extended in a second direction. The first electrically controlled viewing angle switch device has a first liquid crystal layer, a first polarizer and a second polarizer. An angle of 90±20 degrees is included between an optical axis of the first liquid crystal layer and the first direction. The first polarizer and the second polarizer are respectively located at two opposite sides of the first liquid crystal layer. An absorption axis of the first polarizer and a, absorption axis of the second polarizer are parallel to or perpendicular to the first direction. A display apparatus adopting the viewing angle switch module is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.