Ambient light and proximity sensors sense distances up to 10cm

June 27, 2016 // By Julien Happich
With its APM-16D17-05-DF8-TR8 and APM-16D17-06-DF8-TR8 ambient light and proximity sensors, Everlight aims to save energy and reduce unwanted signals and noises when used in smartphones, tablet PCs, residential smart lighting and digital signage applications.

Both series use a specially coated photo diode with an optical response similar to human eyes. They have a common I²C interface allowing them to be driven with a supply voltage of only 1.7V. They are optimized to sense the ambient brightness and adjust the backlight of a screen to the most clear and comfortable settings. For example, the screen gets brighter in shining daylight but darkens in a dark environment. They can also detect a nearby object and turn on or off the screen based on the distance allowing it to turn off the screen and touch panel while the user makes a call (face close to the screen). After finishing the call, both screen and touch panel will automatically go back to the standard operating mode. Thanks to their embedded IR emitter, these products can be programmed to sense distances up to 10 cm. These APMs are also equipped with a programmable interrupt notification with an adjustable sensing period, allowing software control of the screen brightness during Audio functions. This reduces power consumption, the most concerning issue of portable electronics devices.

The APM-16D17-05-DF8 is a VCSEL sensor with strengths of both compact size and energy saving design. It has a receiving angle of ±35 degrees and is designed to be mounted behind an extremely small hole only 2mm in diameter. Its illumination sensitivity range is 0.471m-53280 Lux and certified to IEC 60825-1 for the safety of laser products to the human eye.
The APM-16D17-06-DF8 uses a lower cost standard LED sensor with a receiving angle of ±40 degrees and an illumination sensitivity range of 0.536m-69000Lux. It is designed to be mounted behind either a large oblong hole or dual holes in the fount panel.
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