Ambient light sensors target display power management solutions
This cost-effective solution saves power for backlighting displays in mobile appliances by adjusting the backlight brightness depending on the ambient light. To ensure accurate measurement, the spectral response of the ambient light sensor has been designed to correspond to that of the human eye. The Everlight ALS are current output types with a high output linearity across a wide illumination range and a low sensitivity variation across various light sources.
The ALS can be operated within a supply voltage range from 1.8V to 5.5V and in a temperature range from -40 up to 85°C. Besides the standard ALS, Everlight also provides a combined ambient light and proximity sensor called APS, with the same features as an ALS but additionally equipped with a proximity sensor to measure the closeness of approaching/departing objects. This sensor device is intended primarily for use in applications in which measurement of both ambient light and proximity sensing is a must, such as laptop computers, PDAs, camcorders, and GPS systems.
Visit Everlight Electronics at www.everlight.com
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