Method and apparatus for regional liquid crystal display back light unit dimming using electrochromic material
US10847098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2018 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Oct 27, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0686
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An information handling system may comprise a liquid crystal display having a plurality of pixels, an electrochromic material layer having a plurality of electrodes disposed between an interior surface of a chassis and a transistor-array layer, and a high reflection layer reflecting light emitted from an LED disposed between the electrochromic material layer and the transistor-array layer away from the interior surface of the chassis. A processor may execute code instructions of an electrochromic material regional backlight unit dimming control system to identify a low-intensity pixel region including a subset of the plurality of pixels associated within high dynamic ratio image data with a low intensity value, identify an electrode of the electrochromic material layer associated with the low-intensity pixel region; and pass a current through the electrode such that a portion of the electrochromic material becomes opaque to the light reflected from the high reflection layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.