The structure of capacitive touch screen is mainly to coat a transparent thin film conductor layer on the glass screen, then add a protective glass outside the conductor layer, and coat the four sides of the touch screen with long and narrow electrodes to form a low-voltage alternating current in the conductor. electric field. When touching the screen, due to the existence of the electric field of the human body, a coupling capacitance will be formed between the finger and the conductor layer, and the current from the four electrodes will flow to the contact, and the current strength is proportional to the distance between the finger and the electrode. The control located behind the touch screen The controller will calculate the proportion and strength of the current, and accurately calculate the position of the touch point.
Compared with the common resistive touch screen on the market at that time, the capacitive touch screen has obvious advantages. First, capacitive touchscreens only require touch, no pressure to generate a signal, whereas resistive touchscreens are activated by pressure. Second, the average lifespan of capacitive touch screens is long. Again, in the resistive touch screen, the upper film needs to be thin enough to be elastic, so that it can bend down to contact the lower film, so it is easy to damage, while the capacitive touch screen cover can be thicker, and has glass protection, good scratch resistance , can better protect conductors and inductors. In addition, capacitive touch screens are more durable, less prone to aging, and resistant to high temperatures. Moreover, the double-glass design of the capacitive touch screen can effectively prevent the impact of external environmental factors on the touch screen. Even if the screen is stained with dirt, dust or oil, the capacitive touch screen can still accurately calculate the touch position. More importantly, the touch screen at this time has developed from an early analog touch screen to a digital touch screen, which can realize multi-touch.
Hangzhou Grahowlet Technology Co., Ltd.
is a comprehensive service provider of capacitive touch screen module and TFT LCD display for various industries. In order to meet different requirements of worldwide customers, Hongxiao supply all kinds of product structures such as G + G, G + F (G + F + F ),P + G, etc. and various technical support programs such as Cypress , Atmel, EETI, FocalTech, Goodix etc. according to different application environments. We provides solutions that match all customers’ touch screen needs and create products based on multiple technologies.
Post time: Sep-08-2022