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Light pen


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Light pen

  1. 1. LIGHT PENAyesha Mahboob
  2. 2. Definition An input device that utilizes a light-sensitive detector to select objects on adisplay screen. wired to a video terminal used to drawpictures or select menu options.
  3. 3. HistoryThe handmadeprototype of a "light gun"in 1952 was part of theWhirlwind Project at MIT.
  4. 4. Classification A light pen is a computer input device a light-sensitive pen used in conjunctionwith a computers TV set or monitor. It allows the user to point to displayedobjects, or draw on the screen
  5. 5. Uses Can be used on a computer screen, TVscreen and a smart board.
  6. 6. Construction It includes a light that is detected by thepixels on the screen. It has a photoreceptor for sensing thesignal
  7. 7. Manufacture The light pen includes a body, a drivingpulse generating module and a lightgenerating module The body has a pen shape, and an end ofthe body includes an opening throughwhich light exits.
  8. 8. Operation light pen you can move the pointer andselect objects on the display screen bydirectly pointing to the objects with thepen. A light pen is similar to a mouse
  9. 9. Maintenance and fault finding a small invention being easily damaged is a disadvantage. short lifespan. too much light can confuse the sensor,cause it to operate erratically.
  10. 10. Thank you