Control of LED array in a liquid crystal display assembly
US9905170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2016 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Jun 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display assembly includes a display unit having a liquid crystal layer and an LED array configured to illuminate the liquid crystal layer. A driver circuit is operatively connected to the LED array and configured to control a luminance of the LED array. A control module is operatively connected to the display unit and includes a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for controlling the LED array in the display unit. The control module is programmed to obtain a junction temperature (TJ) of the LED array, via the driver circuit. The junction temperature (TJ) is based at least partially on a first voltage (V1), a second voltage (V2) and a predetermined coefficient (Tcoefficient). The control module may be programmed to enter one of a plurality of stages based at least partially on the junction temperature (TJ).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.