Apparatus and method for using an LED for backlighting and ambient light sensing
US9041697B2 · kind B2 · utility
10Cited by
2References
19Claims
0Family size
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Inventor
Key dates
| Filing date | Mar 10, 2011 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Jul 21, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Embodiments of a backlight module for illuminating a liquid crystal display (LCD) and sensing ambient light are provided herein. The backlight module includes a light-emitting diode (LED) array and a backlight controller. The backlight controller is configured to forward bias the LED array to backlight the LCD and reverse bias the LED array to sense the ambient light level. The backlight controller is configured to adjust the brightness of the LED array based on the current ambient lighting conditions sensed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.