Numerous technological developments have transformed the simple phone used for calls and, at best, messages, into a real device without which some of us could not live. One of the small innovations brought to the smartphone is the proximity sensor, a piece that we will talk about in detail today and that you will learn to appreciate, maybe.
The mobile phone has become a real accessory or an extension of their own hands for many, but we often forget about some of its functions and parts that make our lives easier. So that nothing interferes with the screen when talking on the phone , for example, the proximity sensor was invented that blocks the operation of the display by touch.
This small piece is located on the top of the smartphone, near the speaker, allowing trouble-free calls, without accidentally activating applications or automatically closing the call when you touch the screen with your ear. At the same time, it will help save energy because the screen is one of the most "energy consuming" parts of the device.
How a proximity sensor works for your phone
The proximity sensor is a small piece that works based on the proximity of any telephone object, without requiring physical contact. Detects when something is close and activates a proper internal function. For most devices, it is located upstairs, next to the front camera.
To detect when the phone is close to different surfaces or sources, that proximity sensor will use a stream of light from the infrared spectrum that our eyes do not perceive. It will activate as soon as the phone perceives the call and the light reflection will be monitored by means of a photosensitive diode. This type of technology has been used for decades for remote controls, being adapted to phones.
The infrared sensor will be the one that implements the alarm system, especially those located at the door or windows, in this case it can be effective up to 5 meters in front. When you identify objects, the display and lighting will be turned off.
Ways to activate and deactivate the proximity sensor on the phone
To check if the phone's proximity sensor is working, you will call someone and put your hand next to them, at which point the screen should close. When you take your hand from that place, the screen should turn on again.
Usually, a proximity sensor is always active so that it helps you not to press keys or functions while talking on the phone. When it shows signs of a malfunction or malfunction, you can turn it off and on again.
Possible problems denoting malfunctions:
- The screen closes before you pick up the phone to your ear
- The screen remains dark after the call is completed
- The screen does not darken when you bring the smartphone to your ear.
These things may be based on hardware or software reasons. We present you some possible solutions.
- Check the screen for scratches and dirt
It is possible that the display is dirty or cracked in the area where that proximity sensor is located, so you will take a napkin and wipe it well, looking carefully and inspecting the screen. If you have serious cracks or scratches that prevent the function , you should visit a service.
- Remove the protective foil
If you protect your screen with foil, it may be to blame for possible proximity sensor problems. You will need to carefully remove it and wipe it well with a microfiber napkin.
- Restart the phone
It is possible that, when the device has not been restarted for a long time, it will be overloaded and no longer work in normal parameters. It is recommended to restart the phone once a week because you can bring the functions that fail back to life.
- When was the last time you updated your operating system?
There are many cases in which proximity sensors fail when the phone is left behind with updates . These OS updates are meant to fix bugs and issues, improving performance and functionality. They are usually not done manually, at best receiving a notification to update you. If you haven't received something like this in a long time, check the settings, because you can also solve your sensor problems in this way.
- Reset the device
If none of the above solutions worked and you have a Samsung proximity sensor or another faulty phone, the next attempt will be to reset to factory data. Be careful to back up to a hard drive beforehand so as not to lose information (music, videos, pictures, etc.).
- Call a service
If nothing works and you are stuck with ideas, the next solution is to visit a service, where you may have to replace the sensor, if defective, with a new one. When you do not have experience in parts and how phones work, it is better not to start DIY repairs with videos on the net as tutorials.
Why you need a proximity sensor
The proximity sensor remains a reliable part of the smartphone for the simple reason that it does not have a more complex mechanical construction. There will be few cases in which it fails irreparably. As you have already learned, it becomes a very useful component when talking on the phone, because you no longer have to worry about problems that may occur if you accidentally press the screen while holding it to your ear.
When the screen is not activated, so it is closed, you can handle it without problems and reduce the risk of escaping on foot by improper grip. In addition, this sensor maintains greater battery life because the screen is closed while you are making a voice call.
Another positive aspect of this sensor in the Xiaomi phone , for example, is that the battery no longer overheats, a problem that mobiles have when the screen is on for a long time. It will be harder to wear and will have a longer lifespan before it really needs to be replaced with a better model.