Recucca

The advantage of the infrared touch screen is that it can be touched with a finger, a pen, or any object that can block light. The disadvantage of the infrared touch screen is that it does not feel good when used on a spherical display. This is because the LSISASX12infrared grating matrix that depends on the work obviously requires to be on the same plane. Therefore, the working plane that really senses touch has a larger distance from the curved display screen. Space, especially at the corners, but this shortcoming does not exist on fpga flat-panel displays, such as liquid crystal displays.

In a circuit with resistance, inductance and capacitance, the impedance to the current in the circuit is called impedance. Impedance is often expressed as Z. It is a complex number, actually called resistance and imaginary called reactance, where capacitance is called capdspacitive reactance in a circuit that impedes AC current, inductance is called inductive reactance in a circuit that impedes AC current, and the total impedance caused by capacitance and inductance in a circuit is called reactance. The unit of impedance is Ohm. The concept of impedance is not only found in electric circuits, but also in the mechanics of vibrating systems.