Method for improving visibility of liquid crystal display device, and liquid crystal display device using same
US10054816B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 11, 2010 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | May 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/40
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a liquid crystal display method capable of, when a screen thereof is observed through a polarizer such as sunglasses, ensuring an excellent visibility regardless of the angle of observation. In a liquid crystal display device at least having a backlight light source, a liquid crystal cell, and a polarizer disposed on a viewing side of the liquid crystal cell, a white light-emitting diode is used as the backlight light source; and a polymer film having a retardation of from 3,000 nm to 30,000 nm is used so as to be disposed on the viewing side of the polarizer so that an angle between an absorption axis of the polarizer and a slow axis of the polymer film becomes about 45 degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.