what is a light pen?
Asked by lalit pandey on 22 January 2010 12:40:58 PM   
   
   
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  1. On 22 January 2010 2:10:41 PM Tejeswar Rao B. answered :

    A light pen is a computer input device.
    An input device that utilizes a light-sensitive detector to select objects on a display screen. A light pen is similar to a mouse, except that with a light pen you can move the pointer and select objects on the display screen by directly pointing to the objects with the pen.

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  2. On 25 January 2010 3:34:57 PM naga swathi answered :

    A light-sensitive stylus wired to a video terminal used to draw pictures or select menu options. The user brings the pen to the desired point on screen and presses the pen button to make contact. Contrary to what it looks like, the pen does not shine light onto the screen; rather, the screen beams into the pen. Screen pixels are constantly being refreshed. When the user presses the button, the pen senses light, and the pixel being illuminated at that instant identifies the screen location.
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