A digital pen is an input device which captures the handwriting or brush strokes of a user and converts handwritten analog information created using "pen and paper" into digital data, enabling the data to be utilized in various applications. This type of pen is usually used in conjunction with a digital notebook, although the data can also be used for different applications or simply as a graphic.
Smart pen is a more specific term; it has the same basic characteristics, but also has other features like voice recording or a text scanner. A smart pen is generally larger and has more features than an active pen. Digital pens typically contain internal electronics and have features such as touch sensitivity, input buttons, memory for storing handwriting data and transmission capabilities.
The input device captures the handwriting data, that, once digitized, can be uploaded to a computer and displayed on its monitor.
Some pens are equipped with a digital recording device that allows users to use them as intelligent dictation machines. They can be used, for example for students to record the voice of the teacher while taking notes.
Accelerometer-based digital pens contain components that detect movement of the pen and contact with the writing surface.
Active pens, such as N-trig's DuoSense Pen™, include electronic components whose signals are picked up by a mobile device's built-in digitizer and transmitted to its controller, providing data on pen location, pressure, button presses and other functionality.
Position-based digital pens use a facility to detect the location of the tip during writing. Some models can be found on graphics tablets made popular by Wacom, and on tablet computers using Wacom's Penabled™ technology.
Trackball pens use a sensor that is located on the pen to detect the motion of the trackball.
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