Ambient light sensor system
US11410611B2 · kind B2 · utility
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1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2019 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Aug 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2250/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a display screen, an ambient light sensor disposed behind the display screen, and an electronic control unit operable to control a brightness of the display screen based on a duty cycle of a PWM signal. The electronic control unit is operable to sample an output of the ambient light sensor, identify a pair of consecutive samples of the ambient light sensor output that represent a greatest difference in magnitudes of their values, and to estimate a brightness of the display screen based on the difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.