Backlight module, display device and control method thereof
US11003000B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 20, 2020 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Mar 20, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133606
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present disclosure provides a backlight module, a display device and a control method thereof, and relates to the technical field of display. The backlight module includes: a light source; an optical film; a privacy film disposed on a light exit side of the optical film, and configured to reduce a divergence angle of light from the optical film; and a dimming assembly disposed on one side of the privacy film away from the optical film, and configured to not change a divergence angle of light from the privacy film in a case of being in a first state, and increase the divergence angle of the light from the privacy film in a case of being in a second state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.