Touchscreen capacitive screen principle _ What are the application areas of touch screens
Principle of capacitive touch screen

Touch screen is currently the most user-friendly computer interface, and its application in consumer electronics products is becoming increasingly widespread. Touch detection devices and touch screen controllers can cause damage to the mechanical structure of the detection device during the touch screen installation process, leading to a decrease in touch accuracy and a shortened lifespan of the touch screen; In addition, the cost of commonly used capacitive and resistive touch screens is relatively high. Inductive touch screen avoids damage to the touch detection device during the touch process and extends the lifespan of touch screen products.
The working principle of the inductive touch screen, as well as the hardware circuit and partial program design of the controller, have all been verified. The non direct touch of the inductive touch screen avoids damage to the touch detection device, extends the lifespan of the entire touch control system, and achieves the expected design requirements for the repeatability and sensitivity of touching the same point.

Capacitive touch screens are not affected by dirt, dust, or oil stains, but due to their electric field coupling principle, they are subject to varying degrees of influence from the surrounding environment. At the same time, capacitive touch screens have serious drift phenomena.

What are the application areas of touch screens

Touchscreens have become a hot topic in the market, with smartphones still being the mainstay in places such as shopping malls and hotels. The growth momentum of the smartphone market has slowed down and entered a period of steady development. The application of touch screens outside of mobile phones, such as automotive electronics, retail, healthcare, public facilities, leisure and entertainment, will drive the rapid growth of the touch screen market.

In addition to large-scale applications, touch screens can be greatly innovated in segmented fields. Innovate touch screens in the field of “pen writing tablets”.

The product has been extended to tablets, e-books, all-in-one machines, electronic whiteboards, etc. with pen writing function. And the pen and hand can be used simultaneously, with one hand touching and the pen writing at the same time.

The traditional materials for touch screens include ITO, metal mesh, nano silver wires, carbon nanotubes, conductive polymers, graphene, and others. Metal grids and nano silver wires have many supporters, both of which are metals (silver or copper) with better conductivity than ITO.