IST 1010 SLIDES Chapter (4).pptx

Chapter 4 Input and Output © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password-protected website for...

Chapter 4 Input and Output © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password-protected website for classroom use.  Learning Objectives (1) Explain the purpose of a computer keyboard and the types of keyboards widely used today. List several different pointing devices and describe their functions. Describe the purposes of scanners and readers and list some types of scanners and readers in use today. Explain what digital cameras are and how they are used today. Understand the devices that can be used for audio input. © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 2 ted website for classroom use.  Learning Objectives (2) Describe the characteristics of a display device and explain some of the technologies used to display images. List several types of printers and explain their functions. Identify the hardware devices typically used for audio output. © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec ted website for classroom use. 3  Overview This chapter covers: – The most common input devices – Hardware designed for capturing data in electronic form – Audio input – Types of display devices and how they work – Types of printers and how they work – Audio output devices © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 4 ted website for classroom use.  Keyboards A keyboard is an input device used to enter characters at the location marked by the insertion point or cursor – Can be built-in, wired, or wireless – Typically contains: Standard alphanumeric keys Numeric keypad Function keys Delete and Backspace keys Ctrl and Alt keys Arrow keys Special-purpose keys © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 5 ted website for classroom use.  A Typical Desktop Keyboard © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 6 protected website for classroom use.  Keyboards for Mobile Devices Mobile devices often use: – Slide-out keyboard – Pen or touch input (on-screen keyboard) Can use an external keyboard (stand-alone or built into a case) © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 7 ted website for classroom use.  Pointing Devices Pointing devices are used to: – Select and manipulate objects – Input data – Issue commands to the computer Common types of pointing devices: – Mouse – Pen/stylus – Devices that use touch input © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 8 ted website for classroom use.  Mice A mouse is a common pointing device that the user slides to move a pointer around the screen and clicks to make selections – Older mechanical mice use a ball – Optical or laser mice track with light – Touch mice support two-dimensional gestures – Used to start programs; open, move around, and edit documents; draw or edit images; and more – Can be used with a variety of devices – Typically connect via a USB port or a wireless connection © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 9 ted website for classroom use.  Common Mice and Mouse Operations © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 10 protected website for classroom use.  Pens/Styluses A stylus is a pen-like device used to draw or write electronically on the screen – Also called digital pen, electronic pen, or pen – Pen input is being used for: Photography, graphic design, animation Industrial design, document processing, and healthcare applications Navigating through a document Issuing commands © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc 11 ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec ted website for classroom use.  Pen-Based Computers and Mobile Devices Pen input is often used with mobile devices and tablets Can be used with desktop and portable computers if the display screen supports it © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 12 ted website for classroom use.  Digital Forms With handwriting recognition, written text can be converted to editable typed text The use of digital forms is increasingly © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 13 protected website for classroom use.  Trend Perceptual Computing Users control devices with 3D gestures, voice commands, and facial expressions Noncontact system Allows for full body input and input from a slight distance away or The Leap 3D through a glass System window © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 14 ted website for classroom use.  Other Uses for Digital Pens Digital writing systems are pen-based systems that capture handwritten input as it is being written – Requires special paper with a grid of dots – Transfers handwritten input to computer Graphics tablets are flat, touch sensitive tablets typically connected to computer using a USB port – Also called pen tablets or digitizing devices Signature capture devices are used to record signatures for credit card purchases, deliveries, etc. © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 15 ted website for classroom use.  Examples of Digital Pens in Use © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 16 ted website for classroom use.  Touch Screens Touch screens are display devices that are touched with the finger to select commands or otherwise provide input to the computer – Common on portable computers, smartphones, and other mobile devices – Multi-touch screens can recognize input from more than one finger at a time – Some support both touch and pen input – Surface Hub (large multi-touch wall-mounted display) – Table PC (large computer either built into a table or designed to be used on a table) © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 17 ted website for classroom use.  Examples of Touch Screens © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 18 protected website for classroom use.  Other Pointing Devices Gaming devices Trackballs Control buttons and wheels Touch pads © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 19 ted website for classroom use.  How It Works Augmented Reality Overlays computer generated images on top of real-time images Today, most often with smartphones using camera input, location info, and other data Displays appropriate A smartphone AR app pointing at a business district. information related to images captured by the smartphone © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 20 ted website for classroom use.  Quick Quiz (1) 1. Touch mice __________. a. support finger swipes and gestures b. navigate by a process called inking c. contain a scroll wheel on the top 2. True or False: With handwriting recognition, handwritten text can be converted to editable text. 3. On-screen forms that can convert handwritten text into editable typed text are called __________. Answers: 1) a; 2) True; 3) digital forms © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec ted website for classroom use. 21  Scanners, Readers, and Digital Cameras Some devices capture data initially in digital form Others capture data from source documents – Already exist in physical form (photographs, checks, invoices, or product labels) – Source data automation Saves time Increases accuracy Utilizes scanning or reading devices © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 22 ted website for classroom use.  Scanners A scanner (optical scanner) is an input device that captures an image of an object in digital form – Data is typically input as a single image – Can scan photos, documents, images, etc. – Types of scanners Flatbed scanners (scan flat objects one page at a time) Portable scanners (scan objects while on the go) 3D scanners (scan objects in 3D) There are also task-specific scanners, such as receipt and business card scanners © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 23 ted website for classroom use.  Examples of Scanners © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 24 ted website for classroom use.  Scanning Quality and Resolution Quality of scanned images indicated by optical resolution – Measured in number of dots per inch (dpi) – Can often be specified when image is scanned – Can be changed when scanned image is edited Higher resolution means better quality but larger file size © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 25 ted website for classroom use.  Barcodes and Barcode Readers Barcodes are machine-readable optical codes that represent data as a set of bars Barcode readers are input devices that read barcodes Types of barcodes – Read by traditional barcode reader Universal Product Code (UPC) ISBN Code 39 – Read by mobile apps QR Codes (two-dimensional; hold much more data) Digital watermarks (icons) © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 26 ted website for classroom use.  Examples of Barcodes and Digital Watermark Icons © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 27 ted website for classroom use.  Examples of Barcode Readers © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 28 ted website for classroom use.  Radio Frequency ID (RFID) Radio Frequency Identification (RFID) is a technology that stores, reads, and transmits data located in RFID tags RFID tags contain tiny chips and radio antennas – Can be attached to objects – Read by RFID readers Handheld, portal, and stationary – Tags only need to be within range of the reader, rather than in line of sight Used for a variety of applications – Tracking inventory and assets – Electronic toll collection – Tracking patients in hospitals – Ticketing applications – IDs (driver licenses, U.S. passports, etc.) © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 29 ted website for classroom use.  Near Field Communications (NFC) Near Field Communications (NFC) is a short-range wireless communication standard based on RFID – Used to transfer information between smartphones or between a smartphone and an NFC-enable reader – Used for contactless mobile payments Credit card or smartphone containing the NFC technology needs to be within an inch or so of the NFC-enabled payment terminal – More appropriate than conventional RFID for mobile payments © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 30 ted website for classroom use.  Examples of RFID and NFC Applications © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 31 ted website for classroom use.  Optical Mark Readers (OMR) and Optical Character Recognition (OCR) Optical mark readers (OMRs) input data from optical forms to score or tally exams, questionnaires, ballots Optical character recognition (OCR) recognizes text characters and converts them to electronic form as text, not images – Identifies each character and convert it to editable text – Used to process turnaround documents like monthly bills – Read by OCR devices – Optical characters are designed to be read by OCR devices but can still be read by humans © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 32 ted website for classroom use.  OMR Readers and Optical Characters © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 33 protected website for classroom use.  Magnetic Ink Character Recognition (MICR ) Readers Magnetic ink character recognition (MICR) is used primarily for banking to facilitate check processing – MICR readers (check scanners) read the MICR characters printed at the bottom of checks – Used by banks – Used by businesses to remotely deposit checks – Individuals typically use ATMs or mobile deposit instead © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 34 ted website for classroom use.  Technology and You Mobile Payments and Digital Wallets Digital wallets, like Apple Pay and Google Wallet, store payment information to pay for purchases Mobile digital wallets are stored on mobile devices – Typically use NFC – Competing NFC readers Mobile payments can also be made via mobile credit card An NFC-enabled payment readers, mobile banking apps, terminal. or mobile payment apps (Square Cash or PayPal) © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 35 ted website for classroom use.  Biometric Readers Biometric readers are used to input biometric data such as an individual’s fingerprint or voice – Can be stand-alone readers or built into another piece of hardware – Most often used for access control, to authorize electronic payments, and to log on to secure Web sites © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 36 ted website for classroom use.  Digital Cameras Digital cameras take pictures and records them as digital images – Can be still cameras and/or video cameras – Integrated into portable computers, smartphones, and tablets Digital still cameras – Primary appeal is that images are immediately available – Camera quality is measured in megapixels – Typically use flash memory for storage – Slight delay when taking photos © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 37 ted website for classroom use.  Examples of Digital Still Cameras © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 38 protected website for classroom use.  Digital Video Cameras Digital video cameras – Digital camcorders, PC video cameras (PC cams, webcams) – Built-in and stand-alone cameras – Store images on digital media (flash memory, DVDs, hard drives, etc.) Applications – Live video feeds and recorded video – Surveillance – Video conferences, phone calls, and Webinars – Face recognition systems © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 39 ted website for classroom use.  Audio Input Audio input – The process of entering audio data into the computer Voice input – Inputting spoken words and converting them to digital form via microphone or headset – Used in conjunction with sound recorder software – Speech recognition systems enable the device being used to recognize voice input as spoken words Can be used for dictation as well to as to issue commands to the device – Usually incorporated into smartphones, GPS systems, and other mobile devices © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 40 ted website for classroom use.  Example of a Speech Recognition System © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 41 protected website for classroom use.  Music Input Systems Music input systems input music into a computer or other device – Existing music can be input using CDs or a Web download – For original compositions, microphones, keyboard controllers, and guitar controllers can be used to input music – Inputted music can be edited, saved, played, etc. © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 42 ted website for classroom use.  Quick Quiz (2) 1. Which technology is used primarily by the banking industry to facilitate check processing? a. OCR b. MICR c. OMR 2. True or False: One disadvantage of digital cameras is the slight delay between when the user presses the button and when the camera takes the photo. 3. A voice input system typically requires software and a(n) __________ in order to input voice data or commands into a computer. Answers: 1) b; 2) True; 3) microphone © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 43 ted website for classroom use.  Display Devices Display devices present output visually on some type of screen – Monitors are display devices typically used with a desktop computer – Display screens are built into a variety of devices Notebook and other portable computers Smartphones and mobile devices Handheld gaming devices, home entertainment devices, kitchen appliances Digital photo frames, e-book readers, smart watches Digital signage systems, digital billboards © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 44 ted website for classroom use.  Examples of Display Devices © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 45 protected website for classroom use.  Display Device Characteristics Color vs. monochrome displays – Images are formed using pixels – Most displays today are color displays CRT vs. flat-panel displays – Cathode ray tube (CRT) displays: large, bulky, and heavy – Flat-panel displays: take up less desk space; use less power © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 46 ted website for classroom use.  Size, Aspect Ratio, and Screen Resolution Size and aspect ratio – Device size measured diagonally from corner to corner – Wide variety of sizes available – Most are wide-screen displays (16:9 aspect ratio) Screen resolution – The number of pixels used on a display determines its resolution – Affects the amount of information that can be displayed on the screen at one time – Can be changed to match users’ preference © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 47 ted website for classroom use.  Video Adapters, Interfaces, and Ports Video cards determine the graphic capabilities of a computer VGA, DVI, and HDMI are the three most common interfaces to connect monitors to a computer Ports exposed in the system unit cases connect monitors to computers – Newer option is to use USB ports © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 48 ted website for classroom use.  Example of a Video Card © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 49 protected website for classroom use.  Wired, Wireless, and High- Definition Displays Wired vs. wireless displays – Wired display are physically connected to the system via a cable – Wireless displays connect using a wireless network connection (Wi-Fi, Bluetooth) High-definition displays – Most common HD format is 1080p – Ultra HD (4K) uses about four times as many pixels as 1080p displays © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 50 ted website for classroom use.  Wireless Displays © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 51 protected website for classroom use.  Wearable and Touch Displays Wearable displays project images from a mobile device to a display screen – Smart glasses Touch and gesture capabilities – Kiosks – Portable gaming devices – Smartphones – Tablets © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 52 ted website for classroom use.  Flat Panel Display Technologies Liquid crystal displays (LCDs) use charged liquid crystals between sheets of glass or plastic – Requires backlighting Light emitting diode (LED) displays use LCD panels and LED backlighting Organic light emitting diode (OLED) displays use layers of organic material – Emit visible light so do not require backlighting – More energy efficient – Are thinner and have a wider viewing angle – Incorporated into many digital cameras, smartphones, TVs, and other consumer devices © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 53 ted website for classroom use.  Organic Light Emitting Diode (OLED) Displays © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 54 ted website for classroom use.  Other Types of OLEDs FOLED (Flexible OLED) – OLED displays built on flexible surfaces such as plastic or metallic foil TOLED (Transparent OLED) – Displays are transparent – Emit light toward top and bottom of display surface PHOLED (Phosphorescent OLED) – Process that results in much more conversion of electrical energy into light instead of heat © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 55 ted website for classroom use.  Examples of Special Types of OLEDs © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 56 protected website for classroom use.  Inside the Industry Wearable Holographic Displays Project images on top of what the person wearing the display is already seeing Microsoft HoloLens – Essentially a head- mounted computer – Does not need to connect to a smartphone or Microsoft computer to function HoloLens © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 57 ted website for classroom use.  Electronic Paper (E-Paper) Displays Electronic paper (e-paper) displays use electronic ink (e-ink) – Used for e-readers and other devices – Easier to read in direct sunlight – Content can change wireless – Only uses power to change images, not maintain an image – Can be monochrome or color © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 58 ted website for classroom use.  Other Types of Flat Panel Displays Interferometric Modulator (IMOD) displays – Essentially a complex mirror that uses external light to display images – Designed initially for mobile phones and portable devices – Images are bright and clear, even in sunlight Plasma displays use layers of gas between two plates of glass – Being replaced by LCDs © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 59 ted website for classroom use.  Data and Multimedia Projectors Data projectors (multimedia projectors) display output from a computer to a wall or projection screen – Found in classrooms and conference rooms – Can be wireless or integrated into devices – Some contain an iPod dock Pico projectors are pocket-size and connect to mobile and portable devices Keyboard projectors project virtual keyboards 3D projectors can project images used with 3D glasses or holograms © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 60 ted website for classroom use.  Examples of Data Projectors © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 61 ted website for classroom use.  Printers Printers produce hard copy – Impact printers (dot-matrix) Print mechanism strikes an inked ribbon to transfer ink to the paper Used to produce multipart forms – Non-impact printers (ink-jet/laser) Use liquid ink or toner Produce higher quality images Much quieter than impact printers – Can be color or black-and-white printers © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 62 ted website for classroom use.  Examples of Dot-Matrix and Color Printers © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 63 protected website for classroom use.  Printer Characteristics Print resolution – Measured in dpi (dots per inch) or images per minute (IPM) – More dots per inch results in higher quality output – 300 dpi for general purpose printing; 1,200 dpi for photographs; 2,400 dpi for professional applications Print speed – Measured in pages per minute (PPM) – Range from about 15 to 65 ppm © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 64 ted website for classroom use.  Printer Capabilities Personal vs. network printers – Personal printers connect directly to a single computer – Network printers connect directly to a home or an office network; some can perform cloud printing Connection options – USB connection, wired network, Wi-Fi, Internet Multifunction devices (MFDs) or all-in-ones – Copy, fax, scan, print © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 65 ted website for classroom use.  Cloud Printing © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 66 protected website for classroom use.  Laser Printers Laser printers use toner powder and technology similar to that of a photocopier to produce images on paper The standard for business documents – Print one entire page at a time – Generally faster and have better quality output than ink-jet printers Use toner cartridges; toner is transferred to the paper and fused with heat Color printers use four toner cartridges © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 67 ted website for classroom use.  How Color Laser Printers Work © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 68 protected website for classroom use.  Ink-Jet Printers Ink-jet printers spray droplets of ink to produce images on paper – Use ink cartridges – Usually print in color – Often the choice for home use – Relatively inexpensive with good-quality output – Print more slowly than laser printers – Potential applications for the future Dispensing liquid metal, computer chips, “printing” human tissue, silk and protein ink, etc. © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 69 ted website for classroom use.  How Ink-Jet Printers Work © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password- 70 protected website for classroom use.  Special Purpose Printers Barcode printers (print a variety of barcodes) RFID printers (encode RFID tabs) Label printers (print labels and/or postage) Photo printers Portable printers (used while on the go or by service © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 71 ted website for classroom use.  Integrated and Large-Format Ink-Jet Printers Integrated printers (built into a smartphone, digital camera, etc.) Large-format ink-jet printers (print posters, maps, signs, blueprints, etc.) – Sometimes called plotters – Print up to about 120 inches in width – Some print on fabric © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 72 ted website for classroom use.  3D Printers 3D printers form output in layers to build a 3D version of the desired output – Can print using plastic, metal, ceramic, wood, glass, sugar, etc. – Additive manufacturing – Print customized objects on demand Personal products Medical products Prototypes or custom parts Can contain moving parts – Issues such as 3D-printed weapons © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 73 ted website for classroom use.  Audio Output Audio output includes voice, music, and other audible sounds – Common audio output devices Computer speakers Headphones, headsets, and earbuds © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 74 ted website for classroom use.  Quick Quiz (3) 1. Which display devices takes up the largest amount of room on a desk? a. CRT monitor b. OLED display c. LCD display 2. True or False: Laser printers can only print in black and white. 3. 3D printers typically form output in layers with a process known as __________ manufacturing. Answers: 1) a; 2) False; 3) additive © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 75 ted website for classroom use.  Summary Keyboards Pointing and Touch Devices Scanners, Readers, and Digital Cameras Audio Input Display Devices Printers Audio Output © 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part, exc ept for use as permitted in a license distributed with a certain product or service or otherwise on a password-protec 76 ted website for classroom use.