A small sound generator is mounted in the stylus and the sound is picked up by two microphones placed near the surface.Ĭapacitive tablets work by detecting electrostatic or capacitive signals by a stylus or human. Optical tablets operate by a very small digital camera in the stylus.Īcoustic tablets are early models of graphics tablets. This type of stylus often requires a battery, making it larger and heavier. These graphics tablets may listen for pen signals constantly, reducing inaccuracies in the reading of user input. The stylus does not require a battery for this.Īctive tablets use self-powered electronics that generate and send a signal to the tablet. The wires in the tablet then change to a receiving mode and read the signal generated by the stylus to read its position. The tablet generates an electromagnetic signal, which is received by a circuit in the stylus. Passive tablets use electromagnetic induction technology. Professional pucks often have a loupe for greater precision. A puck is a mouse-like device that can detect its absolute position and rotation. Puck: After stylus, pucks are the most commonly used tablet accessory. It is also used to detect different amounts of pressure, often for use in a drawing program to change line thickness or color density. Stylus: A stylus is a pen-like device that is used to give the tablet its input.
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