1 Computing A handheld, penlike photosensitive device held to the display screen of a computer terminal for passing information to the computer.
- You may have to adjust the brightness of your monitor to get your light pen to work properly.
- Various other light pens have been developed which include a lens for focusing the axially received light.
- The radiated light is directed so as to be projected from a tip of the light pen as required.
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Syllabification: light pen
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