TO OUR PRESENTATION
NAME OF GROUP
YOUNUS ALI RAKIB
MD. TARIKUL ISLAM
OUR PRESENTATION TOPIC
◦ An output device is any peripheral
that receives or displays output from a
◦ Display devices
◦ Voice output devices
◦ Multimedia Projector
What is a display device?
Output device that visually conveys
Information on display device sometimes
called soft copy
Monitor houses display device as separate
Screen coated with tiny dots of phosphor material
Each dot consists of a red, blue, and green
Common sizes are 15, 17, 19, 21, and 22 inches
Viewable size is diagonal measurement of actual
does video travel from the processor to a
Video card (also called a graphics card) converts digital
output from computer into analog video signal
Step 5. Electron guns
Step 1. The
digital video data
to the video card.
fire the three color signals
to the front of the CRT.
Step 3. The
analog signal is
sent through a
cable to the CRT
Step 4. The
into red, green,
and blue signals.
Step 6. An image is
Step 2. The video card’s
(DAC) converts the digital
video data to an analog signal.
displayed on the screen when
the electrons hit phosphor
dots on the back of the screen.
An LCD monitor is a thin, light
computer monitor that displays
images through the use of a liquid
EMITTING DIODE (LED)
Abbreviation of light emitting
diode, an electronic device that
lights up when electricity is
passed through it.
is a printer?
Output device that
produces text and
graphics on paper
Result is hard copy, or
Two orientations: portrait
To created high-quality graphics
documents with multicolored pens to
draw computer output.
Slower than printers but are useful for
outputting large-size charts, maps or
Voice output devices
◦ Voice output devices
Converts digital output data into
To deliver an audio output such as music,
that is connected to the computer
is an agreed
upon format of symbols that allow a
programmer to instruct a computer to
perform certain predefined tasks.
Provide features to support the data
declaring variables, evaluating numeric
expressions, assigning values to variables,
reading and writing data to devices, looping
and making decisions.
◦ Is the natural language of a computer.
◦ Does not need to translate and is ready for immediate
◦ Machine language instruction is a binary string of 0s and 1s.
010 1 1000 0001 0000 1100 0000 0001 0000
◦ Are machine-dependent - each computer type has its own
◦ Programs written in machine languages are not portable
because programs written in for one type of computer
cannot be run on another type
Consists of English-like abbreviations.
Easier to understand.
Program written in assembly languages cannot be
directly processed by a computer.
Must use language translators, called assemblers, to...
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