What is the response range of the proximity sensor?

Question

Electronics

Hello. I would like to know the principle and range of the proximity sensor in smartphones. If so, please provide links to where to read. I searched on the Internet, everywhere either a superficial description or problems are discussed with them. I'm mainly interested in how far it reacts to movement, approach ...

Answer 1

works on the principle of an infrared rangefinder. those. the LED shines, and the light detector sees the reflected light. so it depends on how far such a miracle can shine. most likely, different models (different designs and components used) will have a different range. in general, it measures the approach to the ear, so that everything will work exactly at this distance)
but in general, you can measure it experimentally - write a simple application (or even download some application for viewing sensors) and see at what distance it will work for your phone.

Answer 2

The issue must be taken seriously. Take a description of your phone, find the type of sensor used in it (other phones may use others). Find the specification of this sensor. Read and learn =)