- Capacitive touchscreens detect changes in the screen's electric field caused by your finger.
- The touch controller detects the location of the touch i.e. the X and Y pointers and conveys its information to the processor.
- The phone doesn't see your finger like a camera, but detects the touch by measuring electrical changes.
smartphone It has become one of the most important part of our life. One of the most important parts of a smartphone is its screen. What we are doing on the smartphone, we understand all this information from the screen. That is, from looking at photos to playing games, we understand everything from the screen. We tap on the screen, swipe, take screenshots, zoom photos and sometimes even write on the screen. But have you ever wondered how the phone knows what your fingers are doing on the screen? Nothing users, get ready! The launch date of Nothing OS 5.0 has been decided, the company will make a big bang… know in detail
Capacitive touchscreen
According to the information, a very interesting technology is used behind this. This is called capacitive touchscreen. In fact when we look at the smartphone screen from the outside, a surface is visible. But it has many layers. It also has a touch-sensing layer with the display panel. This layer can sense very small electrical signals and changes in internal parts. When you touch the screen, your fingers create some changes in the system and the phone recognizes the change as a touch. (Photo Courtesy – AI Created)
What exactly happens?
Capacitive touch technology is used in many advanced smartphones. The touch layer of the screen consists of an extremely thin and transparent electrode grid. A small electrical field is created around these electrodes. Suppose there are hundreds of tiny sensor points on the screen. As long as you don't touch the screen, the system maintains a normal electrical state. But when your fingers move near or touch the screen, this electrical state changes.
A change known as Touch Controller
According to the findings, the human body plays an important role in this. In fact, the human body has electricity. The human body can influence electrical charges. When your finger comes in contact with the electric field of the screen, the capacitance changes. The touch controller experiences the same change. The controller then tries to find out which part of the screen has changed. This means that the phone doesn't detect your finger like a camera does, but by measuring electrical changes in the device to determine that the screen has been touched.
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In fact, the electrodes form a kind of network in the smartphone's touchscreen. When fingers touch a spot on the screen, changes in electrical signals around that area are detected. The touch controller reads these changes and makes a guess as to what the state of the touch might be. After this, this information is conveyed to the processor and operating system of the smartphone.
For example, let's say you tap on an app's icon at the bottom left of the screen. The touch system recognizes the X and Y indicators of that location. The operating system recognizes that the app icon at that location has been pressed and then opens the app.