Next Generation ams Light Sensors to Shrink Smart Phone Apertures up to 50%
TMD2620 proximity sensor and TMD2725 ALS modules reduce LED emitter-to-sensor gap to just 1.0mm while eliminating the effect
of optical cross talk
ams AG (SIX: AMS), a leading provider of high performance sensors and analog ICs, today introduced new proximity sensing and
proximity/ambient light sensing modules which enable android smartphone manufacturers to reduce the sensor aperture in the
display’s cover glass to its smallest diameter.
Use of the TMD2620 proximity sensor or the TMD2725, a combined proximity and ambient light sensor, enables phone manufacturers
to reduce the aperture’s size by as much as 50%, improving aesthetic appeal, especially in devices with a white or light-colored
bezel. The TMD2620 and TMD2725 enable aperture size as small as 1.4 and 2.0mm respectively.
The TMD2620 and TMD2725 feature a breakthrough in optical module packaging which allows the emitter – an infra-red (IR) LED –
and photodiode to be placed just 1.0mm apart. Lenses on top of the emitter and sensor along with an optical barrier between them
help to minimize crosstalk, caused by reflections from the surfaces of the cover glass. Offset adjustment registers eliminate the
effect of any residual crosstalk from the module’s proximity calculations. Automatic ambient light subtraction further enhances the
accuracy of the device’s proximity measurements. The ability to measure up to a range of 100mm is comparable to laser-based
solutions.
“Until now, inability to overcome the effects of optical crosstalk have prevented android phone manufacturers from reducing
proximity sensing apertures below 3.0mm”, said Herbert Truppe, Senior Marketing Manager at ams. “Now the TMD2620 and TMD2725
overcome those challenges and enable a smaller aperture than has previously been possible.”
The TMD2620 and TMD2725 are in volume production now. Unit pricing in order quantities of 1,000 is $0.36 for the TMD2620, and
$0.43 for the TMD2725.
For sample and evaluation module requests and for more technical information, go to
www.ams.com/proximity-detection/TMD2620 or
www.ams.com/ambient-light-sensors/TMD2725.
Download press picture and block diagram at http://www.ams.com/eng/Press/Press-Releases/
ams AG
Patricia Moosburger, Media Relations
phone: +43 (0) 3136 500 31235
press@ams.com
www.ams.com
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