Optical film and preparation method therefor, and display device
US11774803B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2022 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | Dec 30, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to an optical film and a preparation method therefor, and a display device. This optical film comprises a light transmitting substrate as well as a magnetic powder and a magneto-optical medium disposed in the light transmitting substrate, the magnetic powder is used for forming a surface magnetic field, and the magneto-optical medium is located in the surface magnetic field, so that a polarization direction of linearly polarized light is rotated after the linearly polarized light passes through the magneto-optical medium. When being applied to a backlight module, this optical film can convert natural light emitted by the backlight module into polarized light in a required polarization direction as much as possible, thereby increasing the utilization ratio of backlight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.