Automatic control electroluminescent backlight panel
US5747938A · kind A · utility
31Cited by
22References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 1995 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | May 22, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electroluminescent backlight panel for a video display system is automatically controlled by the varying ambient light levels. A light detector receives the ambient light level and sends a corresponding electrical signal to a microcontroller. The microcontroller controls the driving of the eletroluminescent backlight power supply according to varying ambient light levels until an optimum backlight output is reached. The automatic electroluminescent backlight control system is combined with an efficient power supply unit in order to further reduce battery energy consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.