2. OUTPUT DEVICES
Output devices are hardware devices
that display or present information to
the user or other people. The monitor,
printer and the speaker are one of the
example of output devices.
5. MONITOR
The monitor is a visual display
device to present output
information in the form of
text, graphics, or video on the
monitor screen
There are two kinds of
monitor; the flat panel or LCD
(Liquid Crystal Display)
monitor and the older
CRT(Cathode Ray Tube)
models
7. CRT (CATHODE RAY TUBE)
It is basically a vacuum tube with an
electron gun and a fluorescent screen. A
coating of red, green and blue are used to
form images in the form of light emitted
from the fluorescent screen.
9. TFT LCD (THIN FILM
TRANSISTOR LIQUID CRYSTAL
DISPLAY)
LCDs are thin, flat display device made of
color pixels arrayed in front of a light
source (backlight) or reflector. The
advantage of LCD monitors is less space,
low power and low
11. PRINTER
It is a computer device
that produces a
permanent copy on
paper of information
from the computer.
There are several kinds
of printers: ink jet, dot-
matrix and LaserJet
printers.
13. DOT MATRIX PRINTER
Prints by hammering or striking an ink-
soaked cloth ribbon against a paper. The
advantage of this kind of printer is that it
can easily create carbon copies because of
the impact action of the printing process.
The cost per page of printing is relatively
cheap.
14. THERMAL PRINTERS
Produce prints on thermal paper by
selective heating wherein heated areas
turns black creating an image. It is mostly
used in groceries and department stores.
They print faster and quieter than dot
matrix.
16. INK JET PRINTER
Operates by propelling or spraying different
sizes of very small and precise amount of ink
onto a paper or other media. Printing quality of
this printer is better than the dot matrix.
The ink comes form cartridge of liquid ink and
this printer is simply black and white or in full
color.
18. LASER JET PRINTER
It produces high quality prints or graphics
on paper. Color and black and white
printing is available. It is based on the
principle of electrostatic printing and
photography wherein the source of ink is
atoner.
20. PLOTTER
It comes in 2 types: Pen plotter and electrostatic. Pen
plotter is a vector graphics printing device which
operates by moving a pen over the surface of paper.
It is usually used for large printing requirements of
CAD drawings of houses, buildings, cars, airplanes
and others. It is also used for vinyl and plastic used for
billions and posters.
22. SPEAKER
It is an output device for sounds music,
audio from movies and computer alerts
are heard from this device. There are
several speaker system for computer,
from 2piece simple system to as many as
5 and more speakers.
24. HEADPHONE
It is a small speaker with away to hold
them close to the ears of the user.
The headphone allows the user to
listen music and sounds all alone
