Module Name: Face detection module close distance illumination sensor module

Proximity sensor Ambient light + LED + IR sensor TMD2771X triple play for the phone two main functions, on the one hand is used to detect the current ambient light (ALS); and using software to adjust the way according to the current ambient light brightness automatically adjusts the backlight brightness conditions to suit the ambient brightness ; soft backlight brightness protect eyesight and can achieve energy-saving effect ; another function we call the proximity sensor function (PROX), the use of internal reflection infrared LED emitter role and sensor built- PD receiver to determine whether the phone during a call near the face , and thus to determine the state of touch-screen buttons backlit status ON / OFF.



Compared with the combo products TSL2771X products, triple device TMD2771X biggest advantage is that it integrates the infrared emission control, no external LED support. Internal combo sensor is not set LED, the need for external LED; this design in hardware / pcb section is not demanding , but the power LED is a more important problems .

Sensor itself consistency TAOS process process can be control, but the LED because of its semiconductor devices discrete ( this is an inherent characteristic ) , will make the actual production requires strict control of LED power level in the production process that there will be some inconvenience .

In addition , three sensors have the transmitter / receiver and integrated design minimized, design and installation of more no space constraints , the structural part of the requirements will be relatively simple. The actual design of the sensor when the combo important consideration within the device after loading mechanism inside the diffraction problem, so when the agency must pay attention to the design of the partition between the transmitter and the receiver ; If the panel has openings issues ( including coated ink holes ) also need to take full account of the open area ( hole diameter main consideration ) and the installation location from the panel surface height , and as a basis for the decision whether or not the light pipe installation / installation. Triple sensor inside the device has been made with stainless steel cut off ; However, due to the smaller sensor body size (2.4 * 4.0 * 1.4 ) , integrated into external isolation also makes it relatively difficult to implement , so the actual design time need to pay attention to related issues, followed by a detailed reference mechanism design recommendations.




Package Included:

1PCS*TMD27713 Face detection close distance illumination sensor module for arduino