Discovering Computers 2008 Fundamentals Fourth Edition Chapter 5 Input and Output.

Discovering Computers 2008FundamentalsFourth Edition

Chapter 5Input and

Output

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?


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


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


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


What is a trackball?


Stationary pointing device with a ball on its top or side

To move pointer, rotate ball with thumb, fingers, or palm of hand


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


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


What is a touch screen?


Touch areas of screen with finger

Often used with kiosks


What is a digital pen?


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


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


How is data entered into a PDA?

p. 174 Fig. 5-13 Next


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


What is a Tablet PC?

p. 175 Fig. 5-15 Next

Mobile computer Primary input device is a

pressure-sensitive digital pen


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


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


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


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


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

Video Input

Video: A Digital Whiteboard to Make Presentations Roar

Next

CLICK TO START


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


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


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


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


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?


p. 179 Fig. 5-24 Next

Can read text printed with magnetized ink Banking industry almost exclusively uses MICR

for check processing


What is a point of sale (POS) terminal?

p. 180 Fig. 5-25 Next

Records purchases, processes credit or debit cards, and updates inventory


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


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


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

Video: SID: Size Matters

Next

CLICK TO START

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


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


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


What is a multifunction peripheral?

p. 194 Fig. 5-45 Next

Provides functionality of a printer, scanner, copy machine, and fax machine


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


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


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


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


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

Discovering Computers 2008 Fundamentals Fourth Edition Chapter 5 Input and Output.

Documents

Transcript of Discovering Computers 2008 Fundamentals Fourth Edition Chapter 5 Input and Output.