How to distinguish the characteristics of capacitive touch screen and resistive touch screen?

        The structure of the capacitive touch screen is mainly to coat a transparent thin-film conductor layer on the glass screen, and then add a protective glass outside the conductor layer. The four sides of the touch screen are plated with long and narrow electrodes to form a low-voltage AC inside the conductive body. electric field. When the screen is touched, due to the presence of the electric field of the human body, a coupling capacitor will be formed between the finger and the conductor layer. The current from the four-side electrode will flow to the contact, and the current strength is proportional to the distance between the finger and the electrode. It is located in the control after touching the screen. The device will calculate the ratio and strength of the current, and accurately calculate the position of the touch point.       Compared with the common resistive touch screens on the market at that time, capacitive touch screens have obvious advantages. First of all, capacitive touch screens only need touch and do not need pressure to generate signals, while resistive touch screens are activated by pressure. Second, the average life span of capacitive touch screens is long. Thirdly, in resistive touch screens, the upper film needs to be thin enough to be flexible so that it can bend downward to contact the lower film, so it is easy to damage, while the cover of the capacitive touch screen can be thicker and protected by glass, which has good scratch resistance. , It can protect conductors and inductors well. In addition, capacitive touch screens are more durable, resistant to aging, and resistant to high temperatures. Moreover, the double glass design of the capacitive touch screen can more effectively prevent the influence of external environmental factors on the touch screen. Even if the screen is dirty, dust or oil stains, the capacitive touch screen can still accurately calculate the touch position. More importantly, the touch screen at this time has evolved from the early analog touch screen to a digital touch screen, which can realize multi-touch.