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Chapter 5 Input and Output

Chapter 5 Input and Output. Chapter 5 Objectives. Next. List the characteristics of a keyboard. Describe the characteristics of LCD monitors, LCD screens, and CRT monitors.

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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 LCD monitors, LCD screens, and CRT monitors 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, 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

  3. What Is Input? Next • What isinput? • 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 Fig. 5-1

  4. Keyboard and Pointing Devices Next • 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

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

  6. 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 • More expensive than a mechanical mouse p. 169 Fig. 5-3b

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

  8. Keyboard and Pointing Devices Next • What is atrackball? • 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

  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. 170 Figs. 5-5—5-6

  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. 171 Fig. 5-7

  11. Keyboard and Pointing Devices Next • What is alight 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 Fig. 5-8

  12. Keyboard and Pointing Devices Next • What is atouch screen? • Touch areas of screen with finger • Often used with kiosks p. 171 Fig. 5-9

  13. Keyboard and Pointing Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Pen Inputbelow 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. 172 Fig. 5-10

  14. Other Input Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Voice Inputbelow Chapter 5 Next • What is voice input? • Entering data by speaking into a microphone • Voice recognitionorspeech recognitionis thecomputer’s capability to distinguish spoken words p. 173

  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. 173 Fig. 5-13

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

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

  18. Other Input Devices Next • What is adocking station? • External device that holds mobile computer • Provides connections to peripherals p. 175 Fig. 5-15

  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. 175 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. 175

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

  22. Other Input Devices 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 that displays its output on a Web page p. 176 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. 176 Fig. 5-18

  24. Other Input Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Scannersbelow 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. 177 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. 177 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. 177 Fig. 5-20

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

  28. Other Input Devices Next • What is amagnetic 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

  29. 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. 179 Fig. 5-24

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

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

  32. Other Input Devices 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 a personal characteristic • Fingerprint scanner captures curves and indentations of fingerprint p. 181 Fig. 5-27

  33. 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. 181 Fig. 5-28

  34. 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 one or more people p. 182 Fig. 5-29

  35. 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. 183 Fig. 5-31

  36. 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 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 p. 184 Fig. 5-30

  37. Display Devices Next • What is aplasma 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

  38. Display Devices Next • What is aCRT monitor? • Containscathode-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

  39. Display Devices Next • What determines the quality of a CRT monitor? • Screen resolution • Text created with a smaller dot pitch is easierto read • Refresh rate is speed at which monitor redrawsimages on screen p. 186

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

  41. Printers Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Ink-Jet Printersbelow Chapter 5 Next • What is anonimpact printer? • Forms characters and graphics without striking paper • Ink-jet printersprays tiny drops of liquid ink onto paper • Prints in black-and-white or color on a variety of paper types p. 189 Fig. 5-36

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

  43. Printers Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Laser Printersbelow Chapter 5 Next • What is alaser 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 p. 190 Fig. 5-38

  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. 191 Fig. 5-39

  45. Printers Next • What is amobile 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

  46. Printers Next • What is aplotter? • Sophisticated printer used to produce high-quality drawings • Large-format printercreates photo-realistic-qualitycolor prints p. 192 Fig. 5-41

  47. 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. 192 Fig. 5-42

  48. Other Output Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Speakers and Headsets below Chapter 5 Next • What is anaudio output device? • Computer component that produces music, speech, or other sounds • Speakers and headsets are common devices p. 193 Fig. 5-43

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

  50. Other Output Devices Next • What isvoice output? • Computer talks to you through speakers on computer • Internet telephonyallows you to have conversationover Web p. 194

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