Liquid crystal display device, polarizer and protective film
US11635653B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2019 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Sep 27, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133609
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a liquid crystal display device, a polarizer, and a protective film that enable suppression of the occurrence of rainbow unevenness to improve visibility in a liquid crystal display device including a backlight light source comprising white-light-emitting diode having an emission spectrum that has one or more peak tops in each of the blue region (400 nm or more and less than 495 nm), the green region (495 nm or more and less than 600 nm), and the red region (600 nm or more and 780 nm or less). The protective film contains a polyethylene terephthalate-based resin film that has a retardation of 3000 to 30000 nm, wherein the CTF value of periodic unevenness of the x value of chromaticity at an observation angle of 55 degrees is 1.2 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.