Specific principle explanation:
1 uses a technology called "resistive touch screen". This screen consists of two layers of glass and plastic coated with transparent conductive substances. When the user touches the screen, the conductive layers in the two layers will stick together, so that the voltage at the current position changes, and then the position of the touch point can be obtained.
2. The advantage of the projected capacitive touch screen lies in its higher sensitivity, which is also the key to the success of the iPhone virtual screen keyboard. In the past, someone developed a text input system on the Pocket PC platform, which directly clicked on the screen with a finger. However, due to the low sensitivity of resistive touch screen, it is inevitable that there will be "missing words" when inputting on the screen virtual keyboard, and even high-speed input cannot be realized.
3. It is proud of its multi-touch technology, which is really an innovation of touch screen application. In the past, mobile phones and PDAs could only identify one focus. In other words, if you touch the screen with two fingers at the same time, the system will only recognize one point, while the iPhone can recognize two points. This makes the iPhone more intuitive.
4. When the finger leaves the screen, the system will simulate the inertia in real life, continue to scroll the project and stop slowly. If scrolling stops before scrolling stops naturally, just touch the screen again. To paraphrase the game, the iPhone's "physical engine" is quite excellent.