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.
HistoryThe handmadeprototype of a "light gun"in 1952 was part of theWhirlwind Project at MIT.
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
Uses Can be used on a computer screen, TVscreen and a smart board.
Construction It includes a light that is detected by thepixels on the screen. It has a photoreceptor for sensing thesignal
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.
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
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.