Virtual Proximity Sensing - definition

First, let's get to know what a Proximity Sensor actually is!
A proximity sensor is a physical sensor that works by IR (InfraRed) light. In smartphones, it helps to keep the display off during an ongoing call to avoid un-intentional touches by the cheek. Whenever the phone is placed on the ear, the IR sensor gets activated and turns off the display immediately to avoid any circumstances like that.
But in modern smartphones, to execute that particular operation smartphone manufacturers mostly stopped providing a physical proximity sensor. Instead, they use an advanced algorithm, and real-time data permutation obtained from existing compulsory gyroscope and accelerometer sensors.
And in current days, most smartphone devices with full-screen displays started using this technology.

Pros: Power and size efficient.

Cons: In a few devices it was observed that the virtual proximity sensing algorithm is not working properly as how it should be. This could happen because of less intelligence or logic in programs used for virtual proximity sensing.

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