Tablet computers are self contained pen-driven computers generally for specific purposes, environments and user needs and include a liquid crystal display screen (LCD) positioned in sealing engagement behind an aperture formed into the front housing of the housing assembly. A tablet computer has a flat, plane box shaped main body, and does not have keyboards as standard equipment, and has a tablet that also serves as displays provided on their fronts. Selected conventional electronics are positioned within the interior volume of the housing assembly with output connectors as required disposed through the central wall of the rear housing.
The tablet PC may have a touch display panel and may be able to connect to another PC through a cabled or a wireless means. Among other ways of entering textual information, Tablet PC users will often use a stylus, also referred to herein as a pen, to write on a display area of the Tablet PC. Such a pen or stylus may also be used as a pointing device directly on the screen or above the screen to make various in-air gestures. To operate the tablet PC, which is similar to common writing types, a special pen is used with a touch display screen to perform various operating procedures. The pen-based input devices fall into two broad categories defined by the type of tablet input device employed. The first type of tablet input device is a transparent overlay that sits on top of the graphics display so that the graphics display image is viewable through the tablet. The active area of the tablet input device correspondingly maps to the graphics display area. The second type of tablet input device is a digitizing table with an opaque tablet that sits off to the side of the graphics display. Similarly to the transparent overlay tablet input device, the active area of the tablet corresponds to the graphics display area. Graphical user interfaces or GUIs are becoming increasingly popular with computer users. Many people find that computers having GUIs are easier to learn and use than comparable computers without GUIs. Typically, graphical images can be input into the pen computer systems by merely moving the stylus across the surface of the screen, i.e. making a “stroke” on the screen. The pen input operation may be performed on a desk, or by holding the pen in one hand and supporting the computer with the other hand....
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