1A handheld pen-like photosensitive device held to the display screen of a computer terminal for passing information to the computer.
More example sentences
- 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.
Definition of light pen in:
- The US English dictionary