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Enhancing mobile devices with light sensors

Posted: 18 Jun 2007 ?? ?Print Version ?Bookmark and Share

Keywords:trade-offs of different ambient light sensors? dynamic range of photoresistor photodiode phototransistor? light sensing and calibration in portable CE?

As electronics seamlessly weaves its way into our lives, sensors play an increasingly important role. Light sensors are among the simplest and cheapest sensors, allowing their inclusion into numerous consumer products ranging from night lights to cameras.

In this article, Intersil Corp.'s Principal Application Engineer Tamara Papalias and Application Engineering Director Mike Wong discuss the different available light sensors, and covers trade-offs in resolution, dynamic range and cost. Using integrated circuitry with light sensors enables on-chip calibration, filtering and increased resolution. These advances are discussed with respect to two applications: an ambient-light sensor for a laptop and another for a cellphone display.

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