What is The Structural Composition of The Capacitive Touch Screen?
The innermost conductive layer is a shielding layer, which acts to shield the internal electrical signal. The middle conductive layer is the key part of the entire touch screen. There are direct leads on the four corners or four sides, which are responsible for detecting the position of the touch point.
What is the Working Principle of a Capacitive Touch Screen?
When the user touches the capacitive screen, the user's finger and the working surface form a coupling capacitor due to the human body electric field. Because the high-frequency signal is connected to the working surface, the finger absorbs a small current, which flows out from the electrodes at the four corners of the screen, and theoretically flows the current through the four electrodes to the four corners of the finger. Proportional to the distance, the controller derives the position by precise calculation of the ratio of the four currents
What Are The Characteristics of The Double Glass of The Capacitive Touch Screen?
The dual glass of the capacitive touch screen not only protects the conductors and sensors but also effectively prevents external environmental factors from affecting the touch screen. Even if the screen is stained with dirt, dust or oil, the capacitive touch screen can accurately calculate the touch position.
What is a Mutual Capacitive Touch screen?
The self-capacitance scanning method is equivalent to projecting the touch points on the touch screen to the X-axis and Y-axis directions, respectively, and then calculating the coordinates in the X-axis and Y-axis directions, respectively, and finally combining the coordinates of the touch points.
How is a Capacitive Touch Screen Made?
The capacitive touch screen is a four-layer composite glass screen. The inner surface of the glass screen and the interlayer are coated with a layer of ITO. The outer layer is a thin protective layer, The interlayer ITO coating is used as the working surface, four electrodes are led out at the four corners, and the inner layer of ITO is the shielding layer to ensure a good working environment.
You may also like