Patent ID: 9690348
Date: 2017-06-27
CPC Classifications: G05F,G06F

Claim:
1. A contactless IoT device power-on system, comprising: a mobile phone, the mobile phone is equipped with wireless connection, an app and a camera light source; a photo sensor unit; and an IoT device, wherein the app is configured on the mobile phone for managing communication tasks between the mobile phone and the IoT device, the photo sensor unit is configured on the IoT device, the photo sensor unit comprising a first photosensitive circuit, a second photosensitive circuit or a third photosensitive circuit, the first photosensitive circuit comprising a photodiode, a first resistor, a capacitor, and a voltage comparator; the photodiode directly coupled to the first resistor at an anode thereof, the first resistor is connected to a positive input of the voltage comparator, the cathode of the photodiode is coupled to ground, the negative input of the voltage comparator is connected to a second resistor, which in turn is coupled to ground, and is connected to a third resistor which in turn is coupled to VDD, an output of the voltage comparator has a digital voltage output, the second photosensitive circuit has a photo resistor, and the third photosensitive circuit has an amorphous silicon solar cell, an incident light from the camera light source of the mobile phone is illuminated on the photo sensor unit to power on the IoT device in a contactless manner.