![]() This makes it great for smartphones and why you see it on iPhones, Samsung Galaxy, and HTC phones. The advantages of using capacitive touchscreens include a brighter and sharper image due to the glass layer, highly touch sensitive, and supportive of multi-touch functions. Figure 1 shows a helpful diagram from TCI.ed on how it tracks the electrostatic field.įigure 1: How the image processing controller evaluates touchpoints. ![]() An image processing controller continuously monitors the electrostatic field (or the movement of each tiny capacitor) to find where exactly the finger touched the screen. The way it locates where your finger is on the screen is the change of local electrostatic field when your finger touches the glass of the capacitive surface. In this case, the human body (your fingers) is being used as an electrical charge conductor. It’s called capacitive because the technology is based on capacitive coupling that detects anything that is conductive or has a dielectric different from air. There are two common types of touch sensors/screens: capacitive and resistive. ![]() This has become the norm, especially when it comes to smartphones and tablets. Touch sensors are increasingly used on displays.
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