Ambient light, color and proximity sensing all in one chip
The sensor operates behind dark glass to drive intelligent display adaption for color and brightness depending on the lighting context. The TMD3782 on-chip filters minimize the effects of ultra-violet and IR light to improve the overall accuracy of light and color sensing. The sensor’s integrated proximity sensor can be used to simplify a product’s user interface, for instance, supporting intelligent on/off control of smartphone touchscreens.
It can also allow tablets to eliminate false ambient light sensing measurements by detecting when the user’s hand or finger is blocking light from reaching the sensor. The proximity detection is factory-calibrated to a distance of 100mm.
The TMD3782 sensor’s photodiodes have a radial structure to create a uniform and optimized angular response when mounted under the 360° module lens. The sensor also provides a 45 degree field of view for a broader and more accurate measurement of the lighting environment.
An interrupt capability enables the sensor to alert the applications processor when pre-set light and color measurement thresholds are crossed, eliminating the need for continuous polling and reducing overall system power requirements and hence extending battery life.
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