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Chapter 5 Input and Output - PowerPoint PPT Presentation

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Chapter 5 Input and Output

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  1. Chapter 5Input and Output

  2. Chapter 5 Objectives Next List the characteristicsof a keyboard Describe the characteristics of CRT monitors, LCD monitors, and LCD screens Summarize how these pointing deviceswork: mouse, trackball, touchpad, pointing stick, joystick, wheel, light pen, touch screen, stylus, and digital pen Summarize the various types of printers Explain the characteristics of speakers and headsets, fax machines and fax modems, multifunction peripherals, and data projectors 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 Identify input and output options for physically challenged users

  3. What Is Input? Next • What isinput? • Data or instructions entered into memory of computer • Input device is any hardware component used to enter data or instructions p. 156 Fig. 5-1

  4. Keyboard and Pointing Devices Next • What is a keyboard? • 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 p. 157 Fig. 5-2

  5. Keyboard and Pointing Devices Next • How do you use a mouse? • As you move mouse, pointer on screen moves Step 2. Move the mouse diagonally toward the left until the pointer is positioned on the Microsoft Outlook icon. Step 1. Place the mouse toward the right of the mouse pad. p. 158 Fig. 5-3

  6. Keyboard and Pointing Devices mouse buttons wheel button ball Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Mouse below Chapter 5 mouse pad Next • What is amouse? • Pointing device that fits under palm of hand • Pointing device controls movement of pointer, also called mouse pointer • Mechanical mousehas rubber or metal ball on underside p. 158 Fig. 5-4a

  7. Keyboard and Pointing Devices Next • What is anoptical mouse? • No moving mechanical parts inside • Senses light to detect mouse’s movement • More precise than mechanical mouse • Connects using a cable, or wireless p. 159 Fig. 5-4b

  8. Keyboard and Pointing Devices Next • What is atrackball? • Stationary pointing device with a ball on its top • To move pointer, rotate ball with thumb, fingers, or palm of hand p. 159 Fig. 5-5

  9. Keyboard and Pointing Devices Next • What are atouchpadand apointing stick? • Touchpadis small, flat, rectangular pointing device sensitive to pressure and motion • Pointing stickis pointing device shaped like pencil eraser positioned between keys on keyboard p. 160 Figs. 5-6—5-7

  10. Keyboard and Pointing Devices Next • What are ajoystickand awheel? • Joystickis vertical lever mounted on a base • Wheelis steering-wheel-type input device • Pedal simulates car brakes and accelerator p. 160 Fig. 5-8

  11. Keyboard and Pointing Devices Next • What is alight pen? • Handheld input device that can detect light • Press light pen against screen surface and then press button on pen p. 161 Fig. 5-9

  12. Keyboard and Pointing Devices Next • What is atouch screen? • Touch areas of screen with finger • Often used with kiosks p. 161 Fig. 5-10

  13. Keyboard and Pointing Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Stylus and Pen below Chapter 5 Next • What is astylus and a digital pen? • Looks like a ballpoint pen, but uses pressure to write text and draw lines • Used withgraphics tablets, flat electronic boards p. 161 Fig. 5-12

  14. Other Input Devices Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Voice Input below Chapter 5 Next • What is voice input? • Entering data by speaking into a microphone • Voice recognition or speech recognition is thecomputer’s capability to distinguish spoken words p. 163

  15. Other Input Devices Next • What is audio input? • Entering sounds into a computer - speech,music, and sound effects • MIDI - standard defining how digital musicaldevices represent sound electronically p. 163 Fig. 5-13

  16. Other Input Devices Next • How is a data entered into a PDA? p. 164 Fig. 5-14

  17. Other Input Devices Next • What is adocking station? • External device that holds mobile computer • Provides connections to peripherals p. 165 Fig. 5-15

  18. Other Input Devices Next • What is asmart phone? • Users can input and send text messages, graphics, pictures, video clips, and sound files p. 165

  19. Other Input Devices Next • What is adigital camera? • Allows you to take digital pictures • Images viewable immediately on camera • Download to computer • Post pictures to Web p. 165 Fig. 5-16

  20. Other Input Devices Next • What isresolution? • Sharpness and clarity of image • The higher the resolution, the better the image quality, but the more expensive the camera • Pixel(pictureelement) is single point in electronic image • Greater the number of pixels, the better the image quality p. 165

  21. Other Input Devices Next • What isvideo input? • Process of entering full-motion images into computer • Digital video (DV) camerarecords video as digital signals p. 166

  22. Other Input Devices Click to view video Next • What are aPC video cameraand aWeb 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 whose output displays on a Web page p. 166 Fig. 5-17

  23. Other Input Devices Next • What isvideo conferencing? • Two or more geographically separated people who use network on Internet to transmit audio and video data p. 166 Fig. 5-18

  24. Other Input Devices Click to view animation Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Scanners below Chapter 5 Next • What is ascanner? • Light-sensing device that reads printed text and graphics • Used for image processing, converting paper documents into electronic images p. 167 Fig. 5-19

  25. Other Input Devices Next • What is anoptical 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. 167 Fig. 5-21

  26. Other Input Devices Next • What is aturnaround document? • Document that you return to the company that sent it • Portion you return has information printed in OCR characters p. 167 Fig. 5-20

  27. Other Input Devices Next What is amagnetic-ink character recognition(MICR) reader? • Can read text printed with magnetized ink • Banking industry almost exclusively uses MICR for check processing p. 168 Fig. 5-22

  28. Other Input Devices Next • What is apoint of sale (POS) terminal? • 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 p. 169 Fig. 5-23

  29. Other Input Devices Next • What is anautomated teller machine (ATM)? • Self-service banking machine that connects to a host computer through a network • What is asmart display? • Thin monitor that detaches from computer to function as portable wireless touch screen p. 170 Fig. 5-24

  30. Other Input Devices Click to view video Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Biometric Input below Chapter 5 Next • What isbiometrics? • 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 p. 170 Fig. 5-25

  31. Other Input Devices Next • 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 systemreads 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. 171 Fig. 5-26

  32. What is Output? Next • What isoutput? • Data that has been processed into a useful form,called information • Output device is any hardware component that can convey information to user p. 172 Fig. 5-27

  33. Display Devices Next • What is adisplay device? • Output device that visually conveys information • Information on display device sometimes called soft copy • Monitorhouses display device as separate peripheral p. 173

  34. Display Devices Next • What is aCRT monitor? • Containscathode-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 p. 174 Fig. 5-28

  35. Display Devices Next • What isresolution? • Sharpness and clarity of image • Higher resolution makes image sharper, displays more text on screen, makes some elements smaller • Refresh rate is speed at which monitor redrawsimages on screen p. 174

  36. Display Devices Next • How does video travel from the processor to a CRT monitor? • Video card(also called agraphics card)converts digital output from computer into analog video signal Step 5.Electron guns fire the three color signals to the front of the CRT. Step 1.The processor sends digital video data to the video card. 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 6.An image is displayed on the screen when the electrons hit phosphor dots on the back of the screen. Step 2.The video card’s digital-to-analog converter (DAC) converts the digital video data to an analog signal. p. 175 Fig. 5-29

  37. Display Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click LCD Technology below Chapter 5 Next • What is aflat panel display? • 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 p. 176 Fig. 5-30

  38. Display Devices Next • What is agas plasma monitor? • Displays image by applying voltage to layer of gas • Larger screen size and higher display quality than LCD, but much more expensive p. 177 Fig. 5-32

  39. Printers Click to view animation Next • What is aprinter? • Output device that produces text and graphics on paper • Purchasing a printer p. 177 Fig. 5-33

  40. Printers Next • What is animpact printer? • Forms characters by striking mechanism against inked ribbon that contacts paper • Dot-matrix printerproducesprinted images when tiny wire pins strike ribbon • Line printer prints entire lineat a time p. 178 Fig. 5-34

  41. Printers Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Ink-Jet Printers below Chapter 5 Next • What is anonimpact 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 p. 178 Fig. 5-35

  42. Printers Step 1.Take photograph with digital camera and store it on media card in the camera. media card photo printer media cards Click to view video 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. Next • What is aphoto printer? • Color printer that produces photo-lab-quality pictures Step 2.Insert media card into card reader on photo printer. p. 180 Fig. 5-36

  43. Printers Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Laser Printers below Chapter 5 Next • What is alaser printer? • High-speed, high-quality nonimpact printer • 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 p. 181 Fig. 5-37

  44. Printers Next • What is athermal 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. 181 Fig. 5-38

  45. Printers Next • What is amobile printer? • Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, or PDA while traveling p. 182 Fig. 5-39

  46. Printers Next • What is aplotter? • Sophisticated printer used to produce high-quality drawings • Large-format printercreates photo-realistic-qualitycolor prints p. 182 Fig. 5-40

  47. Printers Next • What iswireless printing? • Output transmitted to printer wirelessly via infraredlight waves or radio waves • Bluetooth printing uses radio waves • Devices need to be within 30-foot range p. 182

  48. Other Output Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Speakers and Headsetsbelow Chapter 5 Next • What is anaudio output device? • Computer component that produces music, speech, or other sounds • Speakers and headsets are common devices p. 183 Fig. 5-41

  49. Other Output Devices Next • What isvoice output? • Computer talks to you through speakers on computer • Internet telephonyallows you to have conversationover Web p. 183 Fig. 5-42

  50. Other Output Devices Next • What is afacsimile (fax) machine? • Device that transmits and receives documents over telephone lines • What is afax modem? • Modem that allows you to send and receive electronic documents as faxes p. 184 Fig. 5-43