imd103(output presentation)
TRANSCRIPT
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Nizarman
Zulkifli
Ahmad Faris
Amin Fikri Nik Faris
Hafizi
Khairul Izwan
Shah Izwan Hanafi
Azrol
adam
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What is output?
Next
Data that has been processed into a useful form,
Output device is any hardware component that can convey
information to user
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What is an LCD monitor?
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Uses liquid crystal display
Have a small footprint
Mobile devices that contain
LCD displays include Notebook computer, Tablet
PC, PDA, and Smart Phone
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What about using multiple LCD monitors?
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Some users position
two or more monitors
side by side or stacked
Allows users to runmultiple applications
simultaneously
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What are some mobile devices that have LCD screens?
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PDA
smart phone
Tablet PC
notebookcomputer
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How does LCD work?
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Step 1. Panel
of fluorescenttubes emits
light waves
through
polarizing glass filter,
which guides light
toward layer of liquid
crystal cells.
Step 2. As light passes through liquid crystal, electricalcharge causes some of the cells to twist, making light waves
bend as they pass through color filter.
Step 3. When light reaches
second polarizing glass filter, lightis allowed to pass through any
cells that line up at the first
polarizing glass filter. Absence and
presence of colored light cause
image to display on the screen.
Liquid crystal cells
Color filter
Transparent electrodes
Alignment layer
Polarizing glass filter
Fluorescent tube panel
Uses liquid compound to present information on a
display
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What is resolution?
Sharpness and clarity of image
Higher resolution makes imagesharper, displays more text on
screen, makes some elements
smaller
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Number of horizontal and
vertical pixels in a display device
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How do you use an LCD monitor with a videocard?
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Plug monitor into Digital Video Interface (DVI) port
on computer
standard monitorport S-video port
DVI port
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What is a plasma monitor?
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Displays image by applying voltage to layer of gas
Larger screen size and higher display quality than LCD, but
are more expensive
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Great for game playing, watching movies, and browsing the Internet
HDTVHDTV
(high(high--definition television)definition television)
is the most advanced form
of digital TV
What is digital television (DTV) and high-definition television (HDTV)?
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Uses digital signals to produce
crisper, higher-quality output
on LCD and plasma televisions
Many programs can be
broadcast on a single
digital channel
All broadcast stations
transmit digital signalsHigh resolution
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What is a CRT monitor?
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Contains cathode-ray
tube (CRT)
Screen coated with tiny
dots of phosphor material Each dot consists of a red,
blue, and green phosphor
Common sizes are 15, 17,
19, 21, and 22 inches
Viewable size is diagonal
measurement of actual
viewing area
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What is the ENERGY STAR program?
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Encourages manufacturers to create energy-efficient
devices that require little power when not in use
Monitors and devices meeting guidelines display
ENERGY
STAR label
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What determines the quality of a CRT monitor? Screen resolution
efres r te is s ee t ic onitor re r s
i es on screen
Text cre te it s ller ot itc is e sier
to re
Next
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How does video travel from the processor to a CRT monitor?
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Step 1. Theprocessor sends
digital video data
to the video card.
Step 2. The video cardsdigital-to-analog converter
(DAC) converts the digital
video data to an analog signal.
Step 3. Theanalog signal is
sent through a
cable to the CRT
monitor.
Step 4. TheCRT monitor
separates the
analog signal
into red, green,
and blue signals.
Step 5. Electron gunsfire the three color signals
to the front of the CRT.
Step 6. An image isdisplayed on the screen when
the electrons hit phosphor
dots on the back of the screen.
Video card (also called a graphics card) converts digital
output from computer into analog video signal
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What is a printer?
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Output device that
produces text and
graphics on a physical
medium Result is hard copy, or
printout
Two orientations: portrait
and landscape
portrait
landscape
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What are the various ways to printdocuments and pictures?
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various
ways to
print
printer
cable
docking
station
media
card
cable
wireless
printers
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What is a nonimpact printer?
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Forms characters and graphics without striking paper
Ink-jet printer sprays tiny drops of liquid ink
onto paper
Prints in black-and-white or color on a varietyof paper types
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What is the resolution of a printer?
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Sharpness and clarity
Measured by number of dots per inch (dpi) printer
can output
300 dpi300 dpi 600 dpi600 dpi 1200 dpi1200 dpi
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How does an ink-jet printer work?
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Step 1. A smallresistor heats the
ink, causing the
ink to boil and
form a vapor
bubble.
Step 2. Thevapor bubble
forces the ink
through the
nozzle.
Step 3. Inkdrops onto the
paper.
Step 4. As the vapor bubblecollapses, fresh ink is drawn into
the firing chamber.
print cartridge
print head
firing
chamber
nozzlebubble resistor ink
ink dot
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What is a laser printer?
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High-speed, high-quality
nonimpact printer
Prints text and graphics in very
high-quality resolution,ranging from 1,200 to 2,400 dpi
Typically costs more than
ink-jet printer, but is much
faster
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How does a laser printer work?
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What is a thermal printer?
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Generates images by pushing electrically heated pins
against heat-sensitive paper
Dye-sublimation printer (also called a digital photo printer)
uses heat to transfer dye to specially coated paper
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What is a mobile printer?
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Small, lightweight, battery-powered printer that allows
mobile user to print from notebook computer, Tablet
PC, or PDA while traveling
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What are label printers and postage printers?
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Small printer that prints on adhesive-type material
Postage printer has built-in digital scale and prints
postage stamps
Most also print bar codes
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What is a plotter?
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Sophisticated printer used to produce high-quality
drawings
Large-format printer creates photo-realistic-quality
color prints
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What is a dot-matrix printer?
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Impact printer that produces printed images
when tiny wire pins strike ribbon
Impact printer forms
characters by strikingmechanism against inked
ribbon that contacts paper
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What is a line printer?
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High-speed impact printerthat prints entire lineat a time
Speed measured in lines
per minute (lpm) Band printer prints fully
formed characters using ahammer mechanism
Shuttle-matrix printer ishigh-speed printer thatworks like dot-matrix
printer
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What is an audio output device?
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Computer component that produces music, speech, or
other sounds
Speakers and headsets are common devices
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What is voice output?
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Computer talks to you through speakers on computer
Internet telephony allows you to have conversation
over eb
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What is a facsimile (fax) machine?
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Device that transmits and receives documents over
telephone lines
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What is a fax modem?
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Modem that allows you to send and receive electronic
documents as faxesexternal fax
modem
internal fax card
in system unit
fax machine
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What is a multifunction peripheral?
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Provides functionality
of printer, scanner,
copy machine, and
fax machine
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What is a dataprojector?
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Device that takes image
from computer screen
and projects it onto
larger screen
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What is force feedback?
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Sends resistance to joystick or wheel in response to
actions of user
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What is the Magnifier command?
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indowsMagnifier command
enlarges text
and other items
on screen
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What other output options are available for visuallyimpaired users?
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Change indow settings,
such as increasing size or
changing color of text to
make words easier to read
Blind users can work with
voice output
Braille printer outputs
information in Brailleonto paper
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