Front Screen Glass Lens For Iphonex13 with OCA

                                                                                          The principle of touch screen
The mobile phones, tablet computers, etc. we play are all touch screens. Why can the touch screen respond to human touch?
The touch screen is another innovation of computer input technology. It is very convenient to complete information input and give orders as long as you lightly touch it with your finger. The touch point on the touch screen corresponds to a function switch, and the corresponding function program will start immediately when the finger touches this switch area. Executes a sequence of commands in green.

The key technology of the touch screen is to measure the exact position and coordinates of the touch point. Taking the surface acoustic wave touch screen as an example, it is equipped with horizontal and vertical ultrasonic transmitters in the upper left corner and lower left corner, and two corresponding ultrasonic transmitters in the upper right corner. Ultrasonic receiver, the ultrasonic transmitter always emits ultrasonic signals during the operation of the touch screen. When people touch the screen, their fingers block and absorb part of the ultrasonic waves, so that their energy is reduced. At this time, touching the ultrasonic receiver can Calculate the coordinate value of the finger, so as to get the exact position of the finger and make a response.