Now capacitive touch screens have slowly integrated into our lives. Generally, capacitive touch screen including touch panel, FPC and controller. The controller is the most critical part of the capacitive touch screen. All touch screens have a controller that controls everything capacitive touch screens are no exception. The controller is mainly used to convey touch commands so that when people perform touches, it can quickly respond to appropriate actions. However, the use of capacitive touch screen controllers is somewhat different from other types of touch screen controllers. Let us discuss more about capacitive touch screen controllers and their working principles today.
The capacitive touch screen controller including chips and other components, and is a device will process touch commands. When you execute a touch command, one or more sensors will detect the location of your touch command. This analog position data is then sent to the touch screen controller, where it is converted into digital position data, and then passed to the touch screen computer. It is a bit similar to our human brain, which can control everything and make the human body respond accordingly as the nervous system sends out instructions.
The capacitive touch screen controller is a controller specially used for capacitive touch screens. Resistive touch screens use different types of controllers, and surface acoustic wave (SAW) touch screens usually also have their own types of controllers. The bottom line is that a capacitive touch screen controller is a device that processes touch commands in a capacitive touch screen.
Generally, for capacitive touch screens, there are generally several types of capacitive touch screen controllers. One of the most common types is metal oxide semiconductor chips. That is, we often say Chip on the FPC solution. Another common capacitive touch screen controller is an application-specific integrated circuit chip. It also refers to chip on the board solution.
The principles of the two types of capacitive touch screen controllers are actually the same, but we make it with different forms. In the capacitive touch screen, the current of people is actually used as a conductive object to execute touch commands. Unlike the working principle of a resistive screen, it uses pressure to achieve touch, so you cannot use a resistive object to control a capacitive touch screen. Instead, you can only use conductive objects (such as bare fingers) or capacitive pens to control them. When contacting a conductive object, the charge on the capacitive touch screen interface will change. Conductive objects will basically absorb some charge of the touch screen, and the sensor or sensor will detect these charges. The capacitive touch screen controller will then receive this position data and then process it.
All capacitive touch screens have a controller. As mentioned earlier, there are two main types of capacitive touch screen controllers: metal oxide semiconductor chips and application-specific integrated circuit chips. Their working principles are the same, but we make it with different forms of programs. Both are one or more sensors that send position data to the capacitive touch screen controller. The integrated chip will then process the data and then send it to the touch screen computer.
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