The working principle of capacitive touch screen is based on the current induction generated by the human body. When the user touches the screen, due to the role of the human body's electric field, the user's finger and the screen's working surface (usually by the ITO, i.e., nano indium tin metal oxide coating composed of glass surface) to form a coupling capacitance. This coupling capacitance causes a tiny current to flow from the electrodes on the four corners of the screen, and the current flowing through the four electrodes is proportional to the distance from the fingertip to the four corners. Through a precise calculation of these current ratios, the controller can determine the location of the touch point.
In order to realize multi-touch, capacitive screens add electrodes of mutual capacitance and divide the screen into sections. In each region to set up a set of independent mutual capacitance module, so that the capacitive screen can independently detect the touch of each region, thus realizing multi-touch.
Multi-touch: USB interface capacitive touch screen can support multi-touch, i.e., detecting the position of multiple touch points at the same time to realize more complex and intuitive operation.
Strong compatibility: This type of touch screen is usually compatible with Windows, Android, Linux and other operating systems, making it easy to use on different devices.
Easy to integrate: connected to the host computer through the USB interface, the data is integrated on the chip on the control board, making integration and use easier and more convenient.
USB interface capacitive touch screen is widely used in various fields, including but not limited to:
Industrial control equipment: such as industrial control panels, medical equipment, etc., requiring high precision and reliability of touch operation.
Self-service terminals: such as cash machines, vending machines, ticket machines, etc., which need to provide user-friendly interactive interface.
Multimedia devices: such as advertising machines, touch screen TVs, etc., which need to support multi-touch to realize a richer interactive experience.
Connection Notes:
Driver: Ensure that the driver of the touch screen is compatible with the operating system for optimal performance and stability.
Calibration: During use, the touchscreen may need to be calibrated to ensure the accuracy of the touch points.
Maintenance: Clean the surface of the touchscreen regularly to avoid scratches or damage to prolong its life.
If you need USB interface capacitive touch screen and need to support multi-touch screen, welcome to consult WIWO, our engineering designers based on your needs for you to recommend the right touch display solution, if we have more than 3000 public mold products can not meet your needs, we also support customization, demand welcome to consult.
In summary, USB interface capacitive touch screen supports multi-touch, has a wide range of application prospects and market demand. When choosing and using, you need to consider and configure according to the specific application scenarios and needs.