This idea describes a white- LED (WLED) driver circuit controlled by a simple ambient light sensor (ALS). A typical application would be a brightness control for cell-phone backlighting. On a very ...

Consumer devices like cell phones are using more and more sensors to save power and enhance our interaction with them. Some of the latest devices have more than 10 sensors. It is a natural question ...

Ambient light is increasingly being used as a source of energy. To help designers of such systems, this circuit accurately measures ambient light intensity over four decades of measurement. The design ...

However, enabling OLED displays to consistently maintain excellent legibility over the full range of illumination conditions�from darkness to direct sunlight�has been a challenge. Ideally, it ...