Brightness control system and method for a backlight display device using backlight efficiency
US6388388B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Dec 27, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/144
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides a brightness control system for a backlight display device that uses the efficiency of the backlight to control the backlight to a desired brightness or luminance. The backlight display device may have a display panel, a backlight, a temperature measurement device, and control circuitry. The control circuitry provides a drive current to the backlight in response to a backlight efficiency and a desired brightness signal. The backlight efficiency is a function of the backlight temperature. The brightness control system may maintain the desired brightness throughout the dynamic range of the backlight display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.