Chapter 5Input and Output

Chapter 5 Objectives

List the characteristicsof a keyboard

List the characteristicsof a keyboard

Summarize how these pointing deviceswork: mouse, trackball, touchpad,

pointing stick, joystick, wheel, light pen, touch screen, stylus, and digital pen

Summarize how these pointing deviceswork: mouse, trackball, touchpad,

pointing stick, joystick, wheel, light pen, touch screen, stylus, and digital pen

Describe other types of input, including voice input; input devices for PDAs, Tablet PCs, and smart phones; digital cameras; voice input; scanners and reading devices; terminals; and

biometric input

Describe other types of input, including voice input; input devices for PDAs, Tablet PCs, and smart phones; digital cameras; voice input; scanners and reading devices; terminals; and

biometric input

Describe the characteristics of CRT monitors, LCD monitors, and LCD screens

Describe the characteristics of CRT monitors, LCD monitors, and LCD screens

Summarize the various types of printersSummarize the various types of printers

Explain the characteristics of speakers and headsets, fax machines and fax

modems, multifunction peripherals, and data projectors

Explain the characteristics of speakers and headsets, 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. 156 Fig. 5-1 Next

Input device is any hardware component used to enter data or instructions

Data or instructions entered into memory of computer

Keyboard and Pointing Devices

What is a keyboard?

p. 157 Fig. 5-2 Next

Input device containing 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

How do you use a mouse?

p. 158 Fig. 5-3 Next

Step 1. Place the mouse toward the right of the mouse pad.

Step 2. Move the mouse diagonally toward the left until the pointer is positioned on the Microsoft Outlook icon.

As you move mouse, pointer on screen moves

Keyboard and Pointing Devices

What is a mouse?

p. 158 Fig. 5-4a Next

Pointing device that fits under palm of hand Pointing device controls

movement of pointer, also called mouse pointer

Mechanical mouse has rubber or metal ball on underside

mouse buttonswheel button

mouse pad

ball

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Mouse below Chapter 5

Keyboard and Pointing Devices

What is an optical mouse?

p. 159 Fig. 5-4b Next

No moving mechanical parts inside

Senses light to detect mouse’s movement

More precise than mechanical mouse

Connects using a cable, or wireless

Keyboard and Pointing Devices

What is a trackball?

p. 159 Fig. 5-5 Next

Stationary pointing device with a ball on its top

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. 160 Figs. 5-6—5-7 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 are a joystick and a wheel?

p. 160 Fig. 5-8 Next

Joystick is vertical lever mounted on a base Wheel is steering-wheel-type input device

Pedal simulates car brakes and accelerator

Keyboard and Pointing Devices

What is a light pen?

p. 161 Fig. 5-9 Next

Handheld input device that can detect light Press light pen against

screen surface and then press button on pen

Keyboard and Pointing Devices

What is a touch screen?

p. 161 Fig. 5-10 Next

Touch areas of screen with finger

Often used with kiosks

Keyboard and Pointing Devices

What is a stylus and a digital pen?

p. 161 Fig. 5-12 Next

Looks like a ballpoint pen, but uses pressure to write text and draw lines

Used with graphics tablets, flat electronic boards

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Stylus and Pen below Chapter 5

Other Input Devices

What is voice input? Entering data by speaking into a microphone Voice recognition or speech recognition is the

computer’s capability to distinguish spoken words

p. 163 Next

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Voice Input below Chapter 5

Other Input Devices

p. 163 Fig. 5-13 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 Input Devices

How is a data entered into a PDA?

p. 164 Fig. 5-14 Next

Other Input Devices

What is a docking station?

p. 165 Fig. 5-15 Next

External device that holds mobile computer

Provides connections to peripherals

Other Input Devices

What is a smart phone?

p. 165 Next

Users can input and send text messages, graphics, pictures, video clips, and sound files

Other Input Devices

What is a digital camera?

p. 165 Fig. 5-16 Next

Allows you to take digital pictures

Images viewable immediately on camera Download to

computer Post pictures

to Web

Other Input Devices

What is resolution?

p. 165 Next

Sharpness and clarity of image The higher the resolution, the better the image

quality, but the more expensive the camera Pixel (picture element) is single point in electronic

image Greater the number of pixels, the better the image

quality

Other Input Devices

What is video input?

p. 166 Next

Process of entering full-motion images into computer

Digital video (DV) camera records video as digital signals

Other Input Devices

What are a PC video camera and a Web cam?

p. 166 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 whose output displays on a Web page

Click to view video

Other Input Devices

What is video conferencing?

p. 166 Fig. 5-18 Next

Two or more geographically separated people who use network on Internet to transmit audio and video data

Other Input Devices

What is a scanner?

p. 167 Fig. 5-19 Next

Light-sensing device that reads printed text and graphics Used for image processing, converting paper

documents into electronic images

Click to view animation

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Scanners below Chapter 5

Other Input Devices

What is an optical reader?

p. 167 Fig. 5-21 Next

Optical character recognition (OCR) reads characters in OCR font

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 Input Devices

What is a turnaround document?

p. 167 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 a magnetic-ink character recognition (MICR) reader?

Other Input Devices

p. 168 Fig. 5-22 Next

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

for check processing

Other Input Devices

What is a point of sale (POS) terminal?

p. 169 Fig. 5-23 Next

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

through card readerc—creads customer’s personal data from magnetic strip

Other Input Devices

What is an automated teller machine (ATM)?

p. 170 Fig. 5-24 Next

Self-service banking machine that connects to a host computer through a network

What is a smart display? Thin monitor that detaches

from computer to function as portable wireless touch screen

Other Input Devices

What is biometrics?

p. 170 Fig. 5-25 Next

Authenticates person’s identity by verifying personal characteristic Fingerprint scanner captures

curves and indentations of fingerprint

Hand geometry system measures shape and size of person’s hand

Click to view video

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Biometric Input below Chapter 5

Other Input Devices

What are examples of biometric technology?

p. 171 Fig. 5-26 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. 172 Fig. 5-27 Next

Data 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?

p. 173 Next

Output device that visually conveys information Information on display device sometimes

called soft copy Monitor houses display device as separate peripheral

Display Devices

What is a CRT monitor?

p. 174 Fig. 5-28 Next

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

Display Devices

What is resolution?

p. 174

Sharpness and clarity of image

Refresh rate is speed at which monitor redrawsimages on screen

Higher resolution makes image sharper, displays more text on screen, makes some elements smaller

Next

Display Devices

How does video travel from the processor to a CRT monitor?

p. 175 Fig. 5-29 Next

Step 1. The processor sends digital video data to the video card.

Step 2. The video card’s digital-to-analog converter (DAC) converts the digital video data to an analog signal.

Step 3. The analog signal is sent through a cable to the CRT monitor.

Step 4. The CRT monitor separates the analog signal into red, green, and blue signals.

Step 5. Electron guns fire the three color signals to the front of the CRT.

Step 6. An image is displayed 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

Display Devices

What is a flat panel display?

p. 176 Fig. 5-30 Next

Uses liquid crystal display Also called LCD monitor

Consumes less than one-third the power

Mobile devices that contain LCD displays include Notebook computer, Tablet

PC, PDA, and Smart Phone

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 gas plasma monitor?

p. 177 Fig. 5-32 Next

Displays image by applying voltage to layer of gas Larger screen size and higher display quality than LCD, but

much more expensive

Printers

What is a printer?

p. 177 Fig. 5-33 Next

Output device that produces text and graphics on paper

Purchasing a printer

Click to view animation

Printers

What is an impact printer?

p. 178 Fig. 5-34 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

Printers

What is a nonimpact printer?

p. 178 Fig. 5-35 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 Printers below Chapter 5

Printers

What is a photo printer?

p. 180 Fig. 5-36 Next

Step 2. Insert media card into card reader on photo printer.

Step 3. Use menu to select desired image to print, view it on LCD screen, edit if necessary, select size of the print, and then print image.

Step 4. Remove printed photo from the printer.

Color printer that produces photo-lab-quality pictures

media cards

photo printer

Click to view video

Step 1. Take photograph with digital camera and store it on media card in the camera.

media card

Printers

What is a laser printer?

p. 181 Fig. 5-37 Next

High-speed, high-quality nonimpact printer

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Laser Printers below Chapter 5

Prints text and graphics in very high-quality resolution, ranging from 600 to 2,400 dpi

Typically costs more than ink-jet printer, but is much faster

Printers

What is a thermal printer?

p. 181 Fig. 5-38 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. 182 Fig. 5-39 Next

Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, or PDA while traveling

Printers

What is a plotter?

p. 182 Fig. 5-40 Next

Sophisticated printer used to produce high-quality drawings

Large-format printer creates photo-realistic-qualitycolor prints

Printers

What is wireless printing?

p. 182 Next

Output transmitted to printer wirelessly via infraredlight waves or radio waves Bluetooth printing uses radio waves Devices need to be within 30-foot range

Other Output Devices

What is an audio output device?

p. 183 Fig. 5-41 Next

Computer component that produces music, speech, or other sounds

Speakers and headsets are common devices

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Speakers and Headsetsbelow Chapter 5

Other Output Devices

What is voice output?

p. 183 Fig. 5-42 Next

Computer talks to you through speakers on computer Internet telephony allows you to have conversation

over Web

Other Output Devices

What is a facsimile (fax) machine?

p. 184 Fig. 5-43 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. 184 Fig. 5-44 Next

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

Other Output Devices

What is a data projector?

p. 185 Fig. 5-45 Next

Device that takes image from computer screen and projects it onto larger screen

Putting It All Together

What are suggested output devices for the home user?

p. 186 Fig. 5-46 Next

Putting It All Together

What are suggested output devices for the small office/home office user?

p. 186 Fig. 5-46 Next

Putting It All Together

What are suggested output devices for the mobile user?

p. 186 Fig. 5-46 Next

Putting It All Together

What are suggested output devices for the large business user?

p. 186 Fig. 5-46 Next

Putting It All Together

What are suggested output devices for the power user?

p. 186 Fig. 5-46 Next

Input and Output Devices for Physically Challenged Users

What input devices are available for those with physical limitations?

p. 187 Fig. 5-47 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. 187 Fig. 5-48 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

Click to view video

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