Graphics Tablet is a surface with a pointing device for computer input, usually for graphical works. It receives the information on pen pressure and forwards it to be used by a software.
Technology behind Graphics Tablet
The pen of a Graphics Tablet contains a coil that creates a electromagnetic field generated. Conductor loops in Graphics Tablet tray determines the position by comparing the signal strengths of the induced pin. Additional information such as pen pressure is modulated and sent to the electromagnetic field together with the position data from the Graphics Tablet to the computer.
The pins of the pens of the Graphics Tablet are either active pin through a pin-board battery or by induction powered passive pin from the tray of the Graphics Tablet.
For resistive touch screens, however, the screen surface is pressure sensitive so that an operation can also be carried, for example by touching with hands or other objects. Graphics tablets is used in painting, drawing on the PC and have become an important tool in the following areas :
- Digital Imaging and Digital Painting
- Audio and video editing
- Doing Signature
Advantages and Disadvantages of Graphics Tablet
The control of tools, brushes and similar in graphics applications with a tablet is much more precisely possible with Graphics Tablet than with the mouse. Operation is intuitive, so even people who are not familiar with Graphics Tablet but can draw, can work. Unlike mouse, a Graphics Tablet has absolute coordinates, where each point corresponds approximately to a point on the tablet screen.
In many models of Graphics Tablet, the active region is significantly smaller than the total area of the tablet. This is a big problem of Graphics Tablet.