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A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display. It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy.
several styluses; (l to r) PalmPilot Professional, Fossil Wrist PDA, Nokia 770, Audiovox XV6600, HP Jornada 520, Sharp Zaurus 5500, Fujitsu Lifebook P-1032 In computing, a stylus (or stylus pen) is a small pen-shaped instrument whose tip position on a computer monitor can be detected.
Pen computing refers to any computer user-interface using a pen or stylus and tablet, over input devices such as a keyboard or a mouse.. Historically, pen computing (defined as a computer system employing a user-interface using a pointing device plus handwriting recognition as the primary means for interactive user input) predates the use of a mouse and graphical display by at least two ...
This type of pen is used in conjunction with a graphics tablet, tablet computer, smartphone or digital notebook. The input device captures the handwriting data, that, once digitized, can be displayed on a screen. Common digital pen protocols are: Microsoft Pen Protocol (MPP) (formerly N-trig) Wacom AES 1.0 and 2.0; Wacom EMR
A light pen is a device similar to a touch screen, but uses a special light-sensitive pen instead of the finger, which allows for more accurate screen input. As the tip of the light pen makes contact with the screen, it sends a signal back to the computer containing the coordinates of the pixels at that point.
A pointing device allows a user to input spatial data to a computer. It is commonly used as a simple and intuitive way to select items on a computer screen on a graphical user interface (GUI), either by moving a mouse pointer, or, in the case of a touch screen, by physically touching the item on screen. Common pointing devices include mice ...
See also References External links A Accelerated Graphics Port (AGP) A dedicated video bus standard introduced by INTEL enabling 3D graphics capabilities; commonly present on an AGP slot on the motherboard. (Presently a historical expansion card standard, designed for attaching a video card to a computer's motherboard (and considered high-speed at launch, one of the last off-chip parallel ...
A light pen is a computer input device used in conjunction with a computer's CRT display. It is used to select a displayed menu item. A light pen can also allow users draw on the screen with great positional accuracy. It consists of a photocell and an optical system placed in a small tube.