Chapter 5 Input and Output - 61 slides -

Chapter 5 Objectives List the characteristics of a keyboard Describe the characteristics of LCD monitors, LCD screens, and CRT monitors Summarize how these pointing devices work: mouse, trackball, touchpad, pointing stick, joystick, wheel, audio player, control pad, gamepad, light pen, touch screen, stylus, and digital pen Summarize the various types of printers Explain the characteristics of speakers, headphones and earphones; fax machines and fax modems, multifunction peripherals, and data projectors Describe other types of input, including voice input; input devices for PDAs, smart phones, and Tablet PCs; digital cameras; voice input; scanners and reading devices; terminals; and biometric input Identify input and output options for physically challenged users Next

What Is Input? What is input? Data or instructions entered into the memory of computer Input device is any hardware component used to enter data or instructions into a computer p. 166 - 167 Fig. 5-1 Next

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 p. 168 Fig. 5-2 Next

Keyboard and Pointing Devices What is a mouse? Pointing device that fits under the palm of your hand Pointing device controls movement of pointer, also called the pointer mouse buttons mouse pad ball wheel button Mechanical mouse has rubber or metal ball on its underside Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Mouse below Chapter 5 p. 169 Fig. 5-3a Next

Keyboard and Pointing Devices What is an optical mouse? No moving mechanical parts inside Senses light to detect mouse’s movement More precise than mechanical mouse More expensive than a mechanical mouse p. 169 Fig. 5-3b Next

Video: Alternatives to Your Boring Mouse Beyond the mouse; cool alternatives to mousing around low quality (click to start) high quality (click to start) Next

Keyboard and Pointing Devices 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 p. 170 Fig. 5-4 Next

Keyboard and Pointing Devices What are a touchpad and a pointing stick? 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 p. 170 Figs. 5-5—5-6 Next

Keyboard and Pointing Devices What are a joystick and a wheel? Joystick is vertical lever mounted on a base Wheel is steering-wheel-type input device Pedal simulates car brakes and accelerator p. 171 Fig. 5-7 Next

Other Pointing Devices What is a control pad and a gamepad? Control pad on an audio player allows users to scroll through music, adjust volume, and customize settings Gamepad a pointing device that controls the movement and actions of players or objects in games Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click iPod Click Wheel below Chapter 5 p. 171 Fig. 5-8

Keyboard and Pointing Devices What is a light pen? Handheld input device that can detect the presence of light Press light pen against screen surface and then press button on pen p. 171 Next

Keyboard and Pointing Devices What is a touch screen? Touch areas of screen with finger Often used with kiosks p. 171 Fig. 5-9

Keyboard and Pointing Devices What is a stylus and a digital pen? Looks like a ballpoint pen, but uses pressure to write text and draw lines Used with graphics tablets, flat electronic boards p. 172 Fig. 5-10 Next

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 Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Voice Input below Chapter 5 p. 173 Next

Other Input Devices What is audio input? Entering sounds into a computer - speech, music, and sound effects MIDI - standard defining how digital musical devices represent sound electronically p. 173 Fig. 5-13

Other Input Devices How is data entered into a PDA? p. 174 Fig. 5-14 Next

Other Input Devices What is a smart phone? Users can input and send text messages, graphics, pictures, video clips, and sound files p. 175 Next

PDAs, Tablet PCs, and Smart Phones What is a Tablet PC? Mobile computer that includes handwriting recognition software Primary input device is a pressure-sensitive digital pen p. 175 Fig. 5-15 Next

Other Input Devices What is a digital camera? Allows you to take digital pictures Images viewable immediately on camera Download to computer Post pictures to Web p. 175 Fig. 5-16 Next

Other Input Devices What is resolution? 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 p. 175 Next

Other Input Devices What is video input? Process of storing full-motion images on a computer’s storage medium Digital video (DV) camera records video as digital signals p. 176 Next

Other Input Devices What is a PC video camera and a Web cam? 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 p. 176 Fig. 5-17 Next

Other Input Devices What is video conferencing? Two or more geographically separated people who use network on Internet to transmit audio and video data p. 176 Fig. 5-18 Next

Other Input Devices What is a scanner? Light-sensing device that reads printed text and graphics Used for image processing, converting paper documents into electronic images p. 177 Fig. 5-19 Next

Other Input Devices What is a turnaround document? Document that you return to the company that sent it Portion you return has information printed in OCR characters p. 177 Fig. 5-20 Next

Other Input Devices What is an optical reader? Device that uses light source to read characters, marks, and codes and then converts them into digital data 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 p. 178 Fig. 5-21 Next

Other Input Devices What is an RFID reader? Reads information on the tag via radio waves Can be handheld devices or mounted in a stationary object p. 178 Fig. 5-22 Next

Other Input Devices What is a magnetic stripe card reader? 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 p. 179 Fig. 5-23 Next

Other Input Devices What is a magnetic-ink character recognition (MICR) reader? Can read text printed with magnetized ink Banking industry almost exclusively uses MICR for check processing p. 179 Fig. 5-24

Other Input Devices What is a point of sale (POS) terminal? Records purchases, processes credit or debit cards, and updates inventory p. 180 Fig. 5-25

Other Input Devices What is an automated teller machine (ATM)? Self-service banking machine that connects to a host computer through a network p. 180 Fig. 5-26 Next

Other Input Devices What is biometrics? Authenticates person’s identity by verifying a personal characteristic Fingerprint scanner captures curves and indentations of fingerprint Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Biometric Input below Chapter 5 p. 181 Fig. 5-27

Other Input Devices What are examples of biometric technology? 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 p. 181 Fig. 5-28 Next

What is Output? What is output? Data that has been processed into a useful form, called information Output device is any hardware component that can convey information to one or more people p. 182 Fig. 5-29 Next

Display Devices What is a display device? Output device that visually conveys information Information on display device sometimes called soft copy Monitor houses display device as separate peripheral p. 183 Fig. 5-31

Display Devices What is an LCD monitor? Uses liquid crystal display Have a small footprint 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 Link from left navigation, then click LCD Technology below Chapter 5 p. 184 - 185 Fig. 5-30 Next

Display Devices What is a plasma monitor? Displays image by applying voltage to layer of gas Larger screen size and higher display quality than LCD, but are more expensive p. 185 Fig. 5-32

Display Devices What is a CRT monitor? Contains cathode-ray tube (CRT) Common sizes are 15, 17, 19, 21, and 22 inches Viewable size is diagonal measurement of actual viewing area p. 186 Fig. 5-33

Display Devices What determines the quality of a CRT monitor? Screen resolution Text created with a smaller dot pitch is easier to read Refresh rate is speed at which monitor redraws images on screen p. 186

Printers What is a printer? Output device that produces text and graphics on a physical medium Purchasing a printer p. 187 Fig. 5-34 Next

Printers What are the various ways to print documents and pictures? wireless printers printer cable various ways to print cable docking station media card p. 188 Fig. 5-35

Printers What is a nonimpact printer? 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 Link from left navigation, then click Ink-Jet Printers below Chapter 5 p. 189 Fig. 5-36 Next

Printers What is a photo printer? Color printer that produces photo-lab-quality pictures Many photo printers have a built-in card slot p. 190 Fig. 5-37 Next

Printers What is a laser printer? 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 Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Laser Printers below Chapter 5 p. 190 - 191 Fig. 5-38 Next

Printers What is a thermal printer? 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 p. 191 Fig. 5-39 Next

Printers What is a mobile printer? Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, PDA, or smart phone while traveling p. 192 Fig. 5-40 Next

Printers What is a plotter? Sophisticated printer used to produce high-quality drawings Large-format printer creates photo-realistic-quality color prints p. 192 Fig. 5-41 Next

Printers What is an impact printer? 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 line at a time p. 192 - 193 Fig. 5-42 Next

Other Output Devices What is an audio output device? 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 Link from left navigation, then click Earphones below Chapter 5 p. 193 Fig. 5-43

Video: Wired Cellular Headsets A guide to the best cellular headsets low quality (click to start) high quality (click to start) Next

Other Output Devices What is voice output? Computer talks to you through speakers on computer Internet telephony allows you to have conversation over Web p. 194 Next

Other Output Devices What is a facsimile (fax) machine? 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 p. 194 Fig. 5-44 Next

Other Output Devices What is a multifunction peripheral? Provides functionality of printer, scanner, copy machine, and fax machine p. 194 Fig. 5-45 Next

Other Output Devices What is a data projector? Device that takes image from computer screen and projects it onto larger screen p. 195 Fig. 5-46

Putting It All Together What are suggested output devices for the home user? Home User Input Device Output Device Enhanced keyboard or ergonomic keyboard Mouse Stylus for PDA or smart phone Joystick or wheel Color scanner 3-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 p. 196 Fig. 5-47 Next

Putting It All Together What are suggested output devices for the small office/home office user? 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 p. 196 Fig. 5-47 Next

Putting It All Together What are suggested output devices for the mobile user? 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 3- or 4-megapixel digital camera Headphones that include a microphone Fingerprint scanner for notebook computer 15.7-inch LCD screen on notebook computer Color 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 p. 196 Fig. 5-47

Putting It All Together What are suggested output devices for the power user? 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 8-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 p. 196 Fig. 5-47 Next

Putting It All Together What are suggested output devices for the large business user? 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 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 Color 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 p. 196 Fig. 5-47

Input and Output Devices for Physically Challenged Users What input devices are available for those with physical limitations? Keyboards with larger keys Head-mounted pointer controls pointer on screen p. 197 Fig. 5-48

Input and Output Devices for Physically Challenged Users What other output options are available for visually impaired users? 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 p. 197 Fig. 5-49 Next

Summary of Input and Output Data and instructions Processing and organizing input into output Various techniques of input Various methods of output Commonly used input devices Commonly used output devices Chapter 5 Complete