2. Definition
An input device that utilizes a light-
sensitive detector to select objects on a
display screen.
wired to a video terminal used to draw
pictures or select menu options.
4. Classification
A light pen is a computer input device
a light-sensitive pen used in conjunction
with a computer's TV set or monitor.
It allows the user to point to displayed
objects, or draw on the screen
5. Uses
Can be used on a computer screen, TV
screen and a smart board.
6. Construction
It includes a light that is detected by the
pixels on the screen.
It has a photoreceptor for sensing the
signal
7. Manufacture
The light pen includes a body, a driving
pulse generating module and a light
generating module
The body has a pen shape, and an end of
the body includes an opening through
which light exits.
8. Operation
light pen you can move the pointer and
select objects on the display screen by
directly pointing to the objects with the
pen.
A light pen is similar to a mouse
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.