How to Detect Capacitive Multi-touch Screen?

Views : 810
Author : Capacitive Touchscreen supplier
Update time : 2021-07-06 15:09:39
In order to achieve multi-touch, the capacitive screen depends on increasing the electrode of mutual capacitance. To put it simply, it divides the screen into blocks, and a set of mutual capacitive modules in each area works independently, so the capacitive screen can independently detect the touch of each area, and after processing, it can simply achieve multi-touch.

CTP (Capacity Touch Panel) uses the current induction of the human body to work. The capacitive screen is a four-layer composite glass screen, the inner surface and interlayer of the glass screen are coated with a layer of ITO (nanometer indium tin metal oxide), the outermost layer is only 0.0015mm thick silica glass protective layer, the sandwich ITO coating is used as the working face, four electrodes are drawn out from the four corners, and the inner layer ITO is the screen layer to ensure the working environment.

When the user touches the capacitive screen, due to the human electric field, the user's finger and the working face form a coupling capacitance, because there is a high-frequency signal connected to the working face, so the finger absorbs a very small current. This current flows out from the electrodes on the four corners of the screen, and in theory, the current flowing through the four electrodes is proportional to the distance from the fingers to the four corners. The controller obtains the position through the precise calculation of the four current ratios. It can achieve 99% accuracy and has a response speed less than 3ms.


Related readings:

How to Choose the Right IPS Touch Screen Manufacturer

The Benefits of IPS Touch Screen Technology

7 Advantages of Optical-bonding Touchscreen

Different Use Requirements of Touch Screens in 6 Different Applications

12 Tips For Using Capacitive Touchscreens

How to Detect Capacitive Multi-touch Screen?

Related News
Read More >>
The Evolution of Touch Screen Technology and Its Integration into LCD Displays The Evolution of Touch Screen Technology and Its Integration into LCD Displays
Feb .22.2024
Explore the revolutionary journey of touch screen technology, its seamless integration into LCD displays, and its widespread impact across industries, enhancing user experiences and opening up new possibilities for digital interaction.
BOE 18.5-Inch LCD Display Panels: Unveiling High-Performance Solutions for Digital Signage and More BOE 18.5-Inch LCD Display Panels: Unveiling High-Performance Solutions for Digital Signage and More
Jan .08.2024
In this comprehensive guide, we explore the specifications, features, and key applications of each panel, shedding light on their suitability for various industries. Let's dive in and discover the technological prowess of BOE's 18.5-inch LCD display panels.
Mastering Customization: Unleash the Full Potential of LCD Module Kits Mastering Customization: Unleash the Full Potential of LCD Module Kits
Dec .23.2023
Explore the world of customization in LCD module kits. Discover how tailoring your displays can lead to unique advantages in your projects.
Optimizing Delivery Times for Your LCD Module Procurement Optimizing Delivery Times for Your LCD Module Procurement
Dec .22.2023
Find out how to streamline delivery times for your LCD module orders. Learn about expedited shipping, logistics efficiency, and supply chain management.
pop_close
pop_main
Know more about LCD technology?