Module 3 Hardware Input Processing and Output Devices PDF

Understanding Input and Output Discovering Computers Fundamentals Your Interactive Guide to the Digital World Objectives Overview Identify the keys and buttons commonly found on desktop computer keyboards, and describe how key...

Understanding Input and Output Discovering Computers Fundamentals Your Interactive Guide to the Digital World Objectives Overview Identify the keys and buttons commonly found on desktop computer keyboards, and describe how keyboards for Describe different mouse types mobile computers and devices differ from desktop computer keyboards Describe various types of touch Describe various types of pen screens and explain how a input touch-sensitive pad works See Page 187 2 for Detailed Objectives Discovering Computers Fundamentals, Chapter 5 Objectives Overview Explain the characteristics Explain other types of Summarize the various of LCD monitors, LCD input types of printers screens, and CRT monitors Identify the purpose and features of speakers, Identify input and output headphones, and ear- options for physically buds; data projectors; and challenged users interactive whiteboards See Page 187 3 for Detailed Objectives Discovering Computers Fundamentals, Chapter 5 What Is Input? Input is any data and instructions entered into the memory of a computer Pages 188– 189 4 Discovering Computers Fundamentals, Chapter 5 Figure 5-1 What Is Input? An input device is any hardware component that allows users to enter data and instructions into a computer Page 188 5 Discovering Computers Fundamentals, Chapter 5 Keyboard and Pointing Devices Page 189 6 Discovering Computers Fundamentals, Chapter 5 Keyboard and Pointing Devices A keyboard is an input device that contains keys users press to enter data and instructions into a computer Page 190 7 Discovering Computers Fundamentals, Chapter 5 Figure 5-2 Keyboard and Pointing Devices Most desktop computer keyboards have… Page 190 8 Discovering Computers Fundamentals, Chapter 5 Keyboard and Pointing Devices An ergonomic keyboard has a design that reduces the chance of wrist and hand injuries Ergonomics incorporates comfort, efficiency, and safety into the design of the workplace Page 190 9 Discovering Computers Fundamentals, Chapter 5 Keyboard and Pointing Devices Keyboards on mobile devices typically are smaller and/or have fewer keys Some phones have predictive text input, which saves time when entering text using the phone’s keypad Page 191 10 Discovering Computers Fundamentals, Chapter 5 Figure 5-3 Keyboard and Pointing Devices A mouse is a pointing device that fits under the palm of your hand comfortably – Most widely used pointing device on desktop computers A mouse can be wired or wireless Pages 191 – 192 11 Figure 5-4 Discovering Computers Fundamentals, Chapter 5 Keyboard and Pointing Devices Trackball Touchpad Pointing Stick A trackball is a A touchpad is A pointing stationary a small, flat, stick is a pointing rectangular pressure- device with a pointing sensitive ball on its top device that is pointing or side sensitive to device shaped pressure and like a pencil motion eraser that is positioned between keys on a keyboard Page 192 12 Figures 5-5 – 5-7 Discovering Computers Fundamentals, Chapter 5 Touch Screens and Touch-Sensitive Pads A touch screen is a touch-sensitive display device Page 193 13 Figure 5-8 Discovering Computers Fundamentals, Chapter 5 Touch Screens and Touch-Sensitive Pads Microsoft Surface Touch-sensitive pads Page 193 14 Discovering Computers Fundamentals, Chapter 5 Figures 5-9 – 5-10 Pen Input With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections Page 194 15 Discovering Computers Fundamentals, Chapter 5 Figure 5-11 Other Types of Input Page 195 16 Discovering Computers Fundamentals, Chapter 5 Figure 5-12 Other Types of Input Video games and computer games use a game controller as the input device that directs movements and actions of on-screen objects Joysticks and Gamepads Light guns Dance pads Wheels Motion- sensing Wii Remote controllers Pages 196 - 197 17 Discovering Computers Fundamentals, Chapter 5 Other Types of Input Page 196 18 Discovering Computers Fundamentals, Chapter 5 Figure 5-13 Other Types of Input A digital camera is a mobile device that allows users to take pictures and store them digitally Studio cameras Field cameras Point-and-shoot camera Page 197 19 Discovering Computers Fundamentals, Chapter 5 Other Types of Input Page 197 20 Discovering Computers Fundamentals, Chapter 5 Figure 5-14 Other Types of Input Two factors affect the quality of digital camera photos: Resolution is the number of horizontal and vertical pictures in a display device A pixel is the smallest element Resolution in an electronic display Page 198 21 Discovering Computers Fundamentals, Chapter 5 Other Types of Input Voice input is the process of entering input by speaking into a microphone Voice recognition is the computer’s capability of distinguishing spoken words Audio input is the process of entering any sound into the computer Page 198 22 Discovering Computers Fundamentals, Chapter 5 Other Types of Input Music production software allows users to record, compose, mix, and edit music and sounds Page 198 23 Discovering Computers Fundamentals, Chapter 5 Figure 5-15 Other Types of Input Video input is the process of capturing full-motion images and storing them on a computer’s storage medium Record video on a digital video (DV) camera or use a video capture card to convert analog signals to digital Connect the camera to a port on the system unit Transfer video and images Page 199 24 Discovering Computers Fundamentals, Chapter 5 Video: Video Editing on Your Computer CLICK TO START 25 Discovering Computers Fundamentals, Chapter 5 Other Types of Input A Web cam is a type of digital video camera that enables a user to: Send e-mail Capture video and Add live images to messages with still images instant messages video attachments Broadcast live Make video images over the telephone calls Internet Page 199 26 Discovering Computers Fundamentals, Chapter 5 Other Types of Input A video conference is a meeting between two or more geographically separated people Page 199 27 Discovering Computers Fundamentals, Chapter 5 Figures 5-16 – 5-17 Other Types of Input A flatbed scanner creates a file of the document in memory – Works in a manner similar to a copy machine Page 200 28 Discovering Computers Fundamentals, Chapter 5 Figure 5-18 Other Types of Input Optical character recognition (OCR) involves reading characters from ordinary documents A turnaround document is a document you return to the company that creates and sends it Page 200 29 Discovering Computers Fundamentals, Chapter 5 Figure 5-19 Other Types of Input Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles Page 200 30 Discovering Computers Fundamentals, Chapter 5 Other Types of Input A bar code reader, also called a bar code scanner uses laser beams to read bar codes Page 201 31 Discovering Computers Fundamentals, Chapter 5 Figure 5-20 Other Types of Input RFID (radio frequency identification) uses radio signals to communicate with a tag placed in or attached to an object An RFID reader reads information on the tag via radio waves RFID can track: Tracking times of Tracking location Employee Checking lift runners in a Airline baggage of soldiers wardrobes tickets of skiers marathon Gauging pressure Managing Checking out Tracking toll and temperature inventory library books payments of tires Page 201 32 Discovering Computers Fundamentals, Chapter 5 Other Types of Input Magnetic stripe card readers read the magnetic stripe on the back of cards such as: Credit cards Entertainment cards Bank cards Other similar cards Pages 201 33 Discovering Computers Fundamentals, Chapter 5 Figure 5-22 Other Types of Input MICR (magnetic ink character recognition) devices read text printed with magnetized ink An MICR reader converts MICR characters into a form the computer can process Banking industry uses MICR for check processing Page 202 34 Discovering Computers Fundamentals, Chapter 5 Figure 5-23 Other Types of Input Biometrics authenticates a person’s identity by verifying a personal characteristic Face Hand Voice Fingerprint recognition geometry verification reader system system system Signature Iris recognition Retinal verification system scanners system Pages 202 - 203 35 Discovering Computers Fundamentals, Chapter 5 Other Types of Input iris recognition system fingerprint reader Pages 202 – 203 36 Figures 5-24 – 5-25 Discovering Computers Fundamentals, Chapter 5 Other Types of Input A terminal is a computer that allows users to send data to and/or receive information from a host computer A POS terminal An automated A DVD kiosk is a records purchases, teller machine self-service DVD processes (ATM) allows users rental machine payment, and to access their updates inventory bank accounts Pages 204 – 205 37 Figures 5-26 – 5-28 Discovering Computers Fundamentals, Chapter 5 What Is Output? Output is data that has been processed into a useful form Pages 206 – 207 38 Discovering Computers Fundamentals, Chapter 5 Figure 5-29 What Is Output? An output device is any type of hardware component that conveys information to one or more people Speakers, Display devices Printers headphones, and earbuds Interactive Data projectors whiteboards Page 206 39 Discovering Computers Fundamentals, Chapter 5 Display Devices A display device visually conveys text, graphics, and video information A monitor is packaged as a separate peripheral – LCD monitor – Widescreen Pages 207 – 208 40 Figure 5-30 Discovering Computers Fundamentals, Chapter 5 Display Devices Liquid crystal display (LCD) uses a liquid compound to present information on a display device Resolution Response time Brightness Dot pitch Contrast ratio Page 209 41 Discovering Computers Fundamentals, Chapter 5 Display Devices Plasma monitors are display devices that use gas plasma technology and offer screen sizes up to 150 inches Page 210 42 Discovering Computers Fundamentals, Chapter 5 Figure 5-32 Display Devices A CRT monitor is a desktop monitor that contains a cathode-ray tube Page 210 43 Discovering Computers Fundamentals, Chapter 5 Figure 5-33 Printers A printer produces text and graphics on a physical medium Before purchasing a printer, ask yourself a series of questions Page 211 44 Discovering Computers Fundamentals, Chapter 5 Figure 5-34 Printers Page 212 45 Discovering Computers Fundamentals, Chapter 5 Figure 5-35 Printers A nonimpact printer forms characters and graphics on a piece of paper without actually striking the paper Thermal Ink-jet printers Photo printers Laser printers printers Mobile Large-format Plotters printers printers Page 213 46 Discovering Computers Fundamentals, Chapter 5 Printers An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper – Color or black-and-white – Printers with a higher dpi (dots per inch) produce a higher quality output Page 213 47 Discovering Computers Fundamentals, Chapter 5 Figure 5-36 Printers A photo printer produces color photo-lab-quality pictures Most use ink-jet technology PictBridge allows you to print photos directly from a digital camera Print from a memory card and preview photos on a built-in LCD screen Page 214 48 Discovering Computers Fundamentals, Chapter 5 Printers Page 214 49 Discovering Computers Fundamentals, Chapter 5 Figure 5-37 Printers High-speed Black-and- Laser High- white quality printer Color Pages 214 – 215 50 Discovering Computers Fundamentals, Chapter 5 Figure 5-38 Printers A multifunction peripheral (MFP) is a single device that prints, scans, copies, and in some cases, faxes – Sometimes called an all-in-one device Page 215 51 Discovering Computers Fundamentals, Chapter 5 Figure 5-39 Printers A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper Dye- sublimation printer Pages 215 – 216 52 Discovering Computers Fundamentals, Chapter 5 Figure 5-40 Printers A mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print from a mobile device Page 216 53 Discovering Computers Fundamentals, Chapter 5 Figure 5-41 Printers Plotters are used to produce high-quality drawings Large-format printers create photo-realistic quality color prints on a larger scale Page 216 54 Discovering Computers Fundamentals, Chapter 5 Figure 5-42 Printers Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper Dot-matrix Line printer printer Page 217 55 Discovering Computers Fundamentals, Chapter 5 Printers A dot-matrix printer produces printed images when tiny wire pins on a print head mechanism strike an inked ribbon A line printer prints an entire line at a time Page 217 56 Discovering Computers Fundamentals, Chapter 5 Figure 5-43 Other Output Devices An audio output device produces music, speech, or other sounds Most computer users attach speakers to their computers to: Generate higher-quality sounds for playing games Interact with multimedia presentations Listen to music View movies Page 217 57 Discovering Computers Fundamentals, Chapter 5 Figure 5-44 Other Output Devices Headphones are speakers that cover or are placed outside of the ear Earbuds (also called earphones) rest inside the ear canal Page 218 58 Discovering Computers Fundamentals, Chapter 5 Other Output Devices Voice output occurs when you hear a person’s voice or when the computer talks to you through the speakers Some Web sites dedicate themselves to providing voice output Often works with voice input VoIP uses voice output and voice input Page 218 59 Discovering Computers Fundamentals, Chapter 5 Other Output Devices A data projector is a device that takes the text and images displaying on a computer screen and projects them on a larger screen Page 218 60 Discovering Computers Fundamentals, Chapter 5 Figure 5-45 Other Output Devices An interactive whiteboard is a touch- sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen Page 218 61 Discovering Computers Fundamentals, Chapter 5 Figure 5-36 Putting It All Together Page 219 62 Discovering Computers Fundamentals, Chapter 5 Figure 5-47 Putting It All Together Page 219 63 Discovering Computers Fundamentals, Chapter 5 Figure 5-47 Putting It All Together Page 219 64 Discovering Computers Fundamentals, Chapter 5 Figure 5-47 Input and Output Devices for Physically Challenged Users Head-mounted pointer Braille printer Pages 220 – 221 65 Discovering Computers Fundamentals, Chapter 5 Figures 5-48 – 5-49 Summary Various techniques for Various methods of entering input and output and several several commonly commonly used used input device output devices Page 222 66 Discovering Computers Fundamentals, Chapter 5  Understanding Input and Output Discovering Computers Fundamentals Your Interactive Guide to the Digital World Chapter 5 Complete