What
Is Input?
What is input?
ØData or instructions entered into memory of computer
What are the
two types of input?
ØData
§Unprocessed text, numbers, images, audio, and video
ØInstructions
§Programs
§Commands
§User responses
The
Keyboard
How is the keyboard divided?
ØTyping area
ØNumeric keypad
ØFunction keys, special keys that issue commands
What are
alternative forms for commands?
ØMany programs allow you to use key combination, menu, or
button to obtain same result.
What is a mouse?
ØPointing device that fits under palm of hand
§Pointing device controls movement
of pointer, also called mouse pointer
ØMechanical mouse has rubber or metal ball on underside.
What is an optical mouse?
ØNo moving mechanical parts inside
ØSenses light to detect mouse’s movement
ØMore precise than mechanical mouse
ØConnects using a cable, or wireless
Digital
Cameras
What is a digital camera?
ØAllows you to take digital pictures
ØImages viewable immediately on camera
§Download to computer
§Post pictures to Web
What is resolution?
ØSharpness and clarity of image
ØThe higher the resolution, the better the image quality, but
the more expensive the camera
ØPixel
(picture
element) is single point in electronic image
§Greater the number
of pixels, the better the image quality
Video
Input
What is video input?
ØProcess of entering full-motion images into computer
ØVideo capture card is adapter card that converts analog video signal into
digital signal that computer can use
ØDigital video (DV) camera records video as digital signals
What are a PC video camera and a Web cam?
ØPC video camerac—cDV
camera used to capture video and still images, and to make video telephone calls on Internet
§Also called PC camera
ØWeb camc—cvideo
camera whose output displays on a Web page
What
is Output?
What is output?
ØData that has been processed into a useful form,called information
§Output device is any hardware component that can convey information to user.
Display
Devices
What is a display device?
ØOutput device that visually conveys information
§Information on
display device sometimes called soft copy
ØMonitor houses display device as separate peripheral
CRT
Monitor
What is a CRT monitor?
ØContains cathode-ray tube (CRT)
ØScreen coated with tiny dots of phosphor material
§Each dot consists
of a red, blue, and green phosphor
ØCommon sizes are 15, 17, 19, 21, and 22 inches
§Viewable size is diagonal measurement of actual viewing
area
What is the ENERGY STAR program?
ØEncourages manufacturers to create energy-efficient devices
that require little power when not in use.
ØMonitors and devices meeting guidelines display ENERGY STAR
label
What is resolution?
ØSharpness and clarity of image
ØHigher resolution makes image sharper, displays more text on screen, makes some elements smaller
ØRefresh rate is speed at which monitor redraws images on screen
What are video standards?
ØVideo
Electronics Standards Association (VESA) develops video
standard
What are
various video card configurations?
Flat-Panel
Displays
What is a flat panel display?
ØUses liquid crystal display
§Also called LCD monitor
ØTakes up less desk space than CRT monitor
ØConsumes less than one-third the power
How do you
use an LCD monitor with a video card?
ØPlug monitor into Digital Video Interface (DVI) port on computer
What is a gas plasma monitor?
ØDisplays image by applying voltage to layer of gas
§Larger
screen size and higher display quality than LCD, but much more expensive
Speakers
and Headsets
What is an audio output device?
ØComputer component that produces music, speech, or other
sounds
ØSpeakers and headsets are common devices
Semoga bermanfaat..
Pemateri : Mrs.Imaniah Aliati, S.Kom
Resume by : Tuning Asriana
