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Touch Screen Controller Market - Global Industry ,Size, Share, Growth, Trends, and Forecast 2016 - 2026 A touch screen is a device meant for recording touch inputs, which are made by recording pressure changes on a display screen. For ensuring that these screens work properly, an intermediate medium is needed, which basically consist of the touch screen controllers. These controllers are circuits that act as an interface between a touch screen sensor and the device where the sensors are being used to control the system’s actions. These circuits can be plugged into the touch screen sensors along with the interface through the circuit board.