Discovering Computers 2008 Fundamentals Fourth Edition Chapter 5 Input and Output.
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Chapter 5 Objectives
List the characteristicsof a keyboard
List the characteristicsof a keyboard
Summarize how these pointing devices
work: mouse, trackball, touchpad, pointing stick, light pen, touch screen, stylus, digital pen, and
gaming and media player controllers
Summarize how these pointing devices
work: mouse, trackball, touchpad, pointing stick, light pen, touch screen, stylus, digital pen, and
gaming and media player controllers
Describe other types of input, including voice input; input devices for PDAs, smart phones, and Tablet PCs; digital cameras; video input;
scanners and reading devices; terminals; and biometric input
Describe other types of input, including voice input; input devices for PDAs, smart phones, and Tablet PCs; digital cameras; video input;
scanners and reading devices; terminals; and biometric input
Describe the characteristics of LCD monitors, LCD screens, and CRT
monitors
Describe the characteristics of LCD monitors, LCD screens, and CRT
monitors
Summarize the various types of printersSummarize the various types of printers
Explain the characteristics of speakers, headphones, and earphones;
fax machines and fax modems, multifunction peripherals, and data
projectors
Explain the characteristics of speakers, headphones, and earphones;
fax machines and fax modems, multifunction peripherals, and data
projectors
Identify input and output options for physically challenged users
Identify input and output options for physically challenged users
Next
What Is Input
What is input?
p. 166 Fig. 5-1 Next
Input device is any hardware component that allows users to enter data and instructions
Data or instructions entered into the memory of computer
Keyboard and Pointing Devices
What is a keyboard?
p. 168 Fig. 5-2 Next
Input device that contains keys users press to enter data into a computer
Includes typing area, numeric keypad, and function keys
Can be cordless or built-in
Keyboard and Pointing Devices
What is a mouse?
p. 169 Fig. 5-3a Next
Pointing device that fits under the palm of your hand Pointing device controls
movement of pointer
Mechanical mouse has rubber or metal ball on its underside
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Mousebelow Chapter 5
Keyboard and Pointing Devices
What is an optical mouse?
p. 169 Fig. 5-3b Next
No moving mechanical parts inside
Senses light to detect mouse’s movement
More precise than mechanical mouse
More expensive than a mechanical mouse
Keyboard and Pointing Devices
What is a trackball?
p. 170 Fig. 5-4 Next
Stationary pointing device with a ball on its top or side
To move pointer, rotate ball with thumb, fingers, or palm of hand
Keyboard and Pointing Devices
What are a touchpad and a pointing stick?
p. 170 Figs. 5-5—5-6 Next
Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion
Pointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard
Keyboard and Pointing Devices
What is a light pen?
p. 170 Next
Handheld input device that can detect the presence of light Press light pen against screen surface and then press
button on pen
Keyboard and Pointing Devices
What is a touch screen?
p. 171 Fig. 5-7 Next
Touch areas of screen with finger
Often used with kiosks
Keyboard and Pointing Devices
What is a digital pen?
p. 171 Fig. 5-8 Next
Looks like a ballpoint pen, but uses pressure to write text and draw lines
Used with graphics tablets, flat electronic boards
Gaming and Media Player ControllersWhat are the types of game controllers?
p. 172 Fig. 5-10 Next
Gamepad Joystick Wheel Light gun Dance pad Motion-sensing
game controller
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Wii Remotebelow Chapter 5
Gaming and Media Player ControllersWhat is a touch-sensitive pad?
p. 172 Fig. 5-11 Next
Input device on a portable media player that enables users to scroll through and play music, view pictures, watch videos or movies, adjust volume, and customize settings Click Wheel
Other Types of Input
What is voice input? Entering input by speaking into a microphone Voice recognition or speech recognition is the
computer’s capability to distinguish spoken words
p. 173 Next
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Voice Inputbelow Chapter 5
Other Types of Input
p. 173 Fig. 5-12 Next
What is audio input? Entering sounds into a computer - speech,
music, and sound effects MIDI - standard defining how digital musical
devices represent sound electronically
Other Types of Input
What is a smart phone?
p. 175 Fig. 5-14 Next
Users can input and send text messages, graphics, pictures, video clips, and sound files
Other Types of Input
What is a Tablet PC?
p. 175 Fig. 5-15 Next
Mobile computer Primary input device is a
pressure-sensitive digital pen
Other Types of Input
What is a digital camera?
p. 175 Fig. 5-16 Next
Allows you to take digital pictures
Images viewable immediately on camera Download to
computer Post pictures
to Web
Other Types of Input
What is resolution?
p. 176 Next
Number of horizontal and vertical pixels in a display device
Resolutions range from 3 million to more than 16 million pixels (MP)
Pixel (picture element) is smallest element in electronic image Greater the number of pixels, the better the image
quality
Other Types of Input
What is video input?
p. 176 Next
Process of capturing full-motion images and storing them on a computer’s storage medium
Digital video (DV) camera records video as digital signals
Other Types of Input
What is a PC video camera and a Web cam?
p. 176 Fig. 5-17 Next
PC video camerac—cDV camera used to capture video and still images, and to make video telephone calls on Internet Also called PC camera
Web camc—cvideo camera that displays its output on a Web page
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Web Cams below Chapter 5
Other Types of Input
What is video conferencing?
p. 176 Fig. 5-18 Next
Two or more geographically separated people who use a network or the Internet to transmit audio and video data
Other Types of Input
What is a scanner?
p. 177 Fig. 5-19 Next
Light-sensing device that reads printed text and graphics Used for image processing, converting paper
documents into electronic images
Other Types of Input
What is a turnaround document?
p. 177 Fig. 5-20 Next
Document that you return to the company that sent it Portion you return has
information printed in OCR characters
Other Types of Input
What is an optical reader?
p. 177 - 178 Fig. 5-21 Next
Optical character recognition (OCR) reads typewritten characters
Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles
Bar code reader
Device that uses light source to read characters, marks, and codes and then converts them into digital data
Other Types of Input
What is an RFID reader?
p. 178 Fig. 5-22 Next
Reads information on the tag via radio waves Can be handheld
devices or mounted in a stationary object
Other Types of Input
What is a magnetic stripe card reader?
p. 179 Fig. 5-23 Next
Reads the magnetic stripe on the back of a credit card
Exposure to a magnetic field can erase the contents of a card’s magnetic stripe
What is a magnetic-ink character recognition (MICR) reader?
Other Types of Input
p. 179 Fig. 5-24 Next
Can read text printed with magnetized ink Banking industry almost exclusively uses MICR
for check processing
Other Types of Input
What is a point of sale (POS) terminal?
p. 180 Fig. 5-25 Next
Records purchases, processes credit or debit cards, and updates inventory
Other Types of Input
What is an automated teller machine (ATM)?
p. 180 Fig. 5-26 Next
Self-service banking machine that connects to a host computer through a network
Other Types of Input
What is biometrics?
p. 181 Fig. 5-27 Next
Authenticates person’s identity by verifying a personal characteristic Fingerprint scanner captures
curves and indentations of a fingerprint
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Biometric Input below Chapter 5
Other Types of Input
What are examples of biometric technology?
p. 181 Fig. 5-28 Next
Voice verification system compares live speech with stored voice pattern
Signature verification system recognizes shape of signature
Iris recognition system reads patterns in blood vessels in back of eye Biometric data is sometimes stored
on smart card, which stores personal data on microprocessor embedded in card
What is Output
What is output?
p. 182 Fig. 5-29 Next
Data that has been processed into a useful form
Output device is any hardware component that can convey information to one or more people
Display Devices
What is a display device?
p. 183 - 184 Fig. 5-31 Next
Output device that visually conveys text, graphics, and video information Typically used with desktop computers
Monitor houses display device as separate peripheral
Display Devices
What is an LCD monitor?
p. 184 Fig. 5-30 Next
Uses liquid crystal display Have a small footprint Mobile devices that contain
LCD displays include Notebook computer, Tablet
PC, ultra personal computer, portable media player, smart phone, and PDA
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click LCD Technology below Chapter 5
Display Devices
What is a plasma monitor?
p. 185 Fig. 5-32 Next
Uses gas plasma technology Larger screen size and richer colors than LCD, but are more
expensive
Display Devices
What is a CRT monitor?
p. 186 Fig. 5-33 Next
Contains cathode-ray tube (CRT)
Common sizes are 15, 17, 19, 21, and 22 inches Viewable size is diagonal
measurement of actual viewing area
Display Devices
What determines the quality of a CRT monitor?
p. 186
Screen resolution
Refresh rate is speed at which monitor redrawsimages on screen
Text created with a smaller dot pitch is easierto read
Next
Printers
What is a printer?
p. 187 Fig. 5-34 Next
Output device that produces text and graphics on a physical medium
Purchasing a printer
Printers
What are the various ways to print documents and pictures?
p. 188 Fig. 5-35 Next
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Printing Digital Camera Images below Chapter 5
Printers
What is a nonimpact printer?
p. 189 Fig. 5-36 Next
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 variety
of paper types
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Ink-Jet Printersbelow Chapter 5
Printers
What is a photo printer?
p. 190 Fig. 5-37 Next
Color printer that produces photo-lab-quality pictures
Many photo printers have a built-in card slot
PictBridge is a standard technology that allows you to print pictures directly from a digital camera
Printers
What is a laser printer?
p. 190 - 191 Fig. 5-38 Next
High-speed, high-quality nonimpact printer
Prints text and graphics in high-quality resolution, ranging from 1,200 to 2,400 dpi
Typically costs more than ink-jet printer, but is much faster
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Laser Printersbelow Chapter 5
Printers
What is a thermal printer?
p. 191 Fig. 5-39 Next
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
Printers
What is a mobile printer?
p. 192 Fig. 5-40 Next
Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, PDA, or smart phone while traveling
Printers
What is a plotter?
p. 192 Fig. 5-41 Next
Sophisticated printer used to produce high-quality drawings
Large-format printer creates photo-realistic-qualitycolor prints
Printers
What is an impact printer?
p. 192 - 193 Fig. 5-42 Next
Forms characters by striking mechanism against inked ribbon that contacts paper Dot-matrix printer produces
printed images when tiny wire pins strike ribbon
Line printer prints entire lineat a time
Other Output Devices
What is an audio output device?
p. 193 - 194 Fig. 5-43 Next
Computer component that produces music, speech, or other sounds
Speakers, earphones, and earbuds are common devices
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Earphones below Chapter 5
Other Output Devices
What is voice output?
p. 194 Next
Computer talks to you through speakers on computer Internet telephony allows you to have conversation
over the Internet
Other Output Devices
What is a facsimile (fax) machine?
p. 194 Fig. 5-44 Next
Device that transmits and receives documents over telephone lines
What is a fax modem? Modem that allows you to send and receive electronic
documents as faxes
Other Output Devices
What is a multifunction peripheral?
p. 194 Fig. 5-45 Next
Provides functionality of a printer, scanner, copy machine, and fax machine
Other Output Devices
What is a data projector?
p. 195 Fig. 5-46 Next
Device that takes the text and image from computer screen and projects it onto larger screen
Putting It All Together
What are suggested input and output devices for the home user?
p. 196 Fig. 5-47 Next
Home User Input Device Output Device
• Enhanced keyboard or ergonomic keyboard• Mouse• Stylus for PDA or smart phone• Game controller• Color scanner• 4-megapixel digital camera• Headphones that include a microphone• PC video camera
• 17- or 19-inch color LCD monitor• Ink-jet color printer; or• Photo printer• Speakers• Headphones or earphones
Putting It All Together
What are suggested input and output devices for the small office/home office user?
p. 196 Fig. 5-47 Next
SOHO User Input Device Output Device
• Enhanced keyboard or ergonomic keyboard• Mouse• Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC• Color scanner• 3-megapixel digital camera• Headphones that include a microphone• PC video camera
• 19- or 21-inch LCD monitor• Color LCD screen on Tablet PC, PDA,or smart phone• Multifunction peripheral; or • Ink-jet color printer; or• Laser printer (black-and-white or color)• Fax machine• Speakers
Putting It All Together
What are suggested input and output devices for the mobile user?
p. 196 Fig. 5-47 Next
Mobile User Input Device Output Device
• Wireless mouse for notebook computer• Touchpad or pointing stick on notebook computer• Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC• 4-megapixel digital camera• Headphones that include a microphone• Fingerprint scanner for notebook computer
• 17-inch LCD screen on notebook computer•LCD screen on PDA or smart phone• Mobile color printer• Ink-jet color printer; or• Laser printer, for in-office use (black-and-white or color)• Photo printer• Fax modem• Headphones or earphones• Data projector
Putting It All Together
What are suggested input and output devices for the power user?
p. 196 Fig. 5-47 Next
Power User Input Device Output Device
• Enhanced keyboard or ergonomic keyboard• Mouse• Stylus and portable keyboard for PDA or smart phone• Pen for graphics tablet• Color scanner• 6- to 12-megapixel digital camera• Headphones that include a microphone• PC video camera
• 23-inch LCD monitor• Laser printer (black-and-white or color)• Plotter or large-format printer; or• Photo printer; or• Dye-sublimation printer• Fax machine or fax modem• Speakers• Headphones or earphones
Putting It All Together
What are suggested input and output devices for the large business user?
p. 196 Fig. 5-47 Next
Large Business User Input Device Output Device
• Enhanced keyboard or ergonomic keyboard• Mouse• Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC• Touch screen• Light pen• Color scanner•6- to 12- megapixel digital camera• OCR/OMR readers, bar code readers, or MICR reader• Microphone• Video camera for video conferences• Fingerprint scanner or other biometric device
• 19- or 21-inch LCD monitor•LCD screen on Tablet PC, PDA, or smart phone• High-speed laser printer• Laser printer, color• Line printer (for large reports from a mainframe)• Fax machine or fax modem• Speakers• Headphones or earphones• Data projector
Input and Output Devices for Physically Challenged Users
What input devices are available for those with physical limitations?
p. 197 Fig. 5-48 Next
Keyboards with larger keys Head-mounted pointer controls
pointer on screen
Input and Output Devices for Physically Challenged Users
What other output options are available for visually impaired users?
p. 197 Fig. 5-49 Next
Change Window 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 Braille onto paper
Processing and organizinginput into output
Processing and organizinginput into output
Summary of Input and Output
Data and instructionsData and instructions
Various techniques of inputVarious techniques of input
Commonly used input devicesCommonly used input devices
Various methods of outputVarious methods of output
Commonly used output devicesCommonly used output devices
Chapter 5 Complete
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