Discovering Computers 2008

Chapter 6Output

Chapter 6 Objectives

Describe the four categories of outputDescribe the four categories of output

Summarize the characteristics of LCD monitors,

LCD screens, and plasma monitors

Summarize the characteristics of LCD monitors,

LCD screens, and plasma monitors

Describe the characteristics of a CRT monitor and

factors that affect its quality

Describe the characteristics of a CRT monitor and

factors that affect its quality

Explain the relationship between graphics chips

and monitors

Explain the relationship between graphics chips

and monitors

Describe various ways to printDescribe various ways to print

Summarize the characteristics of ink-jet printers, photo printers, laser printers, thermal printers,

mobile printers, label and postage printers,and plotters and large-format printers

Summarize the characteristics of ink-jet printers, photo printers, laser printers, thermal printers,

mobile printers, label and postage printers,and plotters and large-format printers

Describe the uses of speakers, headphones,and earphones

Describe the uses of speakers, headphones,and earphones

Identify the output characteristics of fax machines and fax modems, multifunction peripherals, data

projectors, joysticks, wheels, and gamepads

Identify the output characteristics of fax machines and fax modems, multifunction peripherals, data

projectors, joysticks, wheels, and gamepads

Identify output options for physically

challenged users

Identify output options for physically

challenged users

Next

Differentiate between a nonimpact printer and an impact printer

Differentiate between a nonimpact printer and an impact printer

What is Output?

What is output?

p. 300 - 301 Fig. 6-1 Next

Data that has been processed into a useful form

Output device is any hardware component that can convey information to one or more people

Display Devices

What is a display device?

p. 302 Next

Output device that visually conveys text, graphics, and video information Information on display device sometimes

called soft copy

Display Devices

What is an LCD monitor?

p. 302 - 303 Fig. 6-2 Next

Uses liquid crystal display Have a small footprint Mobile devices that contain

LCD displays include Notebook computer, Tablet

PC, ultra personal computer, portable media player, smart phone, and PDA

Flat-Panel Displays

What about using multiple LCD monitors?

p. 303 Fig. 6-3 Next

Some users position two or more monitors side-by-side or stacked

Allows users to run multiple applications simultaneously

Flat-Panel Displays

What are some mobile devices that have LCD screens?

p. 303 Fig. 6-4 Next

Click to view Web Link,click Chapter 6, Click Web Linkfrom left navigation, then click LCD Technology below Chapter 6

Flat-Panel Displays

Video: SID: Size Matters

Next

CLICK TO START

Flat-Panel Displays

What is resolution?

p. 304 - 305 Fig. 6-5

Sharpness and clarity of image

Higher resolution makes image sharper, displays more text on screen, makes some elements

smallerNext

Number of horizontal and vertical pixels in a display device

800 x 600typically the

standard

Display Resolution

1280 x 1024maximum resolution

of most monitors

800 horizontal

pixels

600 vertical pixels

Total of 480,000 pixels on screen

2048 x 1536maximum for

high-end monitors

Flat-Panel Displays

How do you use an LCD monitor with a video card?

p. 306 Fig. 6-6 Next

Plug monitor into Digital Video Interface (DVI) porton computer

standard monitorport

S-video port

DVI portClick to view Web Link,click Chapter 6, Click Web Linkfrom left navigation, then click Video Cardsbelow Chapter 6

Flat-Panel Displays

What is a plasma monitor?

p. 307 Fig. 6-8 Next

Displays image by applying voltage to layer of gas Larger screen size and richer colors than LCD, but are more

expensive

Great for game playing, watching movies, and browsing the Internet

HDTV HDTV (high-definition television)(high-definition television)is the most advanced form

of digital TV

Flat-Panel Displays

What is digital television (DTV) and high-definition television (HDTV)?

p. 307 Next

Uses digital signals to producecrisper, higher-quality output

on LCD and plasma televisions

Many programs can bebroadcast on a single

digital channel

All broadcast stationstransmit digital signals

High resolution

CRT Monitors

What is a CRT monitor?

p. 308 Fig. 6-10 Next

Contains cathode-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

CRT Monitors

What is dot pitch? Space between pixels

Step 1Step 1Step 2

Step 1Step 2

Step 3

Step 1Step 2

Step 4

Step 3

Step 1Step 2

Step 3

Step 4

Step 5

Step 2

Step 3

Step 4

Step 5

Step 6

Step 1

Display Devices

Step 1: The processor sends digital video data to the video card.Step 2: The video card’s digital-to-analog converter (DAC) converts the digital video data to an analog signal.

Step 3: The analog signal is sent thought a cable to the CRT monitor.Step 4: The CRT monitor separates the analog signal into red, green, and blue signals.Step 5: Electron guns fire the three color signals to the front of the CRT.Step 6: An image displays on the screen when the electrons hit phosphor dots on the back of the screen.

CRT Monitors

What determines the quality of a CRT monitor?

p. 309

Screen resolution

Refresh rate is speed at which monitor redrawsimages on screen

Text created with a smaller dot pitch is easierto read

Next

CRT Monitors

What is the ENERGY STAR program?

p. 308 Next

Encourages manufacturers to create energy-efficient devices that require little power when not in use

Monitors and devices meeting guidelines display ENERGY STAR label

Display Device Purchasing Decisions

Display Technology (CRT or LCD) Cable Technology (VGA and DVI) Viewable Area (Measured Diagonally) Aspect ratio (ratio of width to height) and orientation

(Landscape or Portrait) Maximum Resolution Refresh Rate – how frequently the display is refreshed.

The higher the better. Color Depth - number of bits to describe a pixel. Power Consumption

CRT: Dot Pitch – space between pixels. LCD: Response Time – time it takes to turn a pixel on/off.

Printers

What is a printer?

p. 310 Fig. 6-11 Next

Output device that produces text and graphics on a physical medium

Result is hard copy, or printout

Two orientations: portrait and landscape

portrait

landscape

Printers

What are the various ways to print documents and pictures?

p. 311 Fig. 6-13 Next

Click to view Web Link,click Chapter 6, Click Web Linkfrom left navigation, then click Printing Digital Camera Images below Chapter 6

Printers

What is a nonimpact printer?

p. 312 Fig. 6-14 Next

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

Printers

What is the resolution of a printer?

p. 313 Fig. 6-15 Next

Sharpness and clarity Measured by number of dots per inch (dpi) printer

can output

300 dpi300 dpi 600 dpi600 dpi 1200 dpi1200 dpi

Printers

How does an ink-jet printer work?

p. 313 Fig. 6-16 Next

Step 1. A small resistor heats the ink, causing the ink to boil and form a vapor bubble.

Step 2. The vapor bubble forces the ink through the nozzle.

Step 3. Ink drops onto the paper.

Step 4. As the vapor bubble collapses, fresh ink is drawn into the firing chamber.

Click to view Web Link,click Chapter 6, Click Web Linkfrom left navigation, then click Ink-Jet Printersbelow Chapter 6

print cartridge

print head

firing chamber

nozzlebubble resistor ink

ink dot

Printers

What is a photo printer?

p. 314 - 315 Fig. 6-17 Next

Color printer that produces photo-lab-quality pictures

Many photo printers have a built-in card slot

PictBridge is a standard technology that allows you to print pictures directly from a digital camera

Click to view Web Link,click Chapter 6, Click Web Link from left navigation, then click PictBridge below Chapter 6

Printers

What is a laser printer?

p. 315 Fig. 6-18 Next

High-speed, high-quality nonimpact printer

Prints text and graphics in high-quality resolution, ranging from 1,200 to 2,400 dpi

Typically costs more than ink-jet printer, but is much faster

Printers

How does a laser printer work?

p. 316 Fig. 6-19 Next

Click to view Web Link,click Chapter 6, Click Web Link from left navigation, then click Laser Printersbelow Chapter 6

Printers

What is a thermal printer?

p. 317 Fig. 6-20 Next

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

Printers

What is a mobile printer?

p. 317 Fig. 6-21 Next

Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, PDA, or smart phone while traveling

Printers

What is a plotter?

p. 318 Fig. 6-23 Next

Sophisticated printer used to produce high-quality drawings

Large-format printer creates photo-realistic-qualitycolor prints

Printers

What is a dot-matrix printer?

p. 318 - 319 Fig. 6-24 Next

Impact printer that produces printed images when tiny wire pins strike ribbon Impact printer forms

characters by striking mechanism against inked ribbon that contacts paper

Printers

What is a line printer?

p. 319 Fig. 6-25 Next

High-speed impact printer that prints entire lineat a time

Speed measured in lines per minute (lpm) Band printer prints fully

formed characters using a hammer mechanism

Shuttle-matrix printer is high-speed printer that works like dot-matrix printer

3-D Printers

Next

3-D Printers

Next

SpeedSpeedSpeedSpeed

Printers

How do you know which printer to buy?

p. 310 Next

BudgetBudgetBudgetBudget Color orColor orblack and whiteblack and white

Color orColor orblack and whiteblack and white

Cost per pageCost per pageCost per pageCost per page Paper typesPaper typesand sizesand sizes

Paper typesPaper typesand sizesand sizes

Graphics and Graphics and photo printingphoto printingGraphics and Graphics and photo printingphoto printingMultiple copiesMultiple copiesMultiple copiesMultiple copies

SystemSystemcompatibilitycompatibility

SystemSystemcompatibilitycompatibility

Depends on printing needs

WirelessWirelesscapabilitycapabilityWirelessWireless

capabilitycapabilityFuture needsFuture needsFuture needsFuture needs

Speakers, Headphones, and HeadsetsWhat is an audio output device?

p. 320 - 321 Figs. 6-26 – 6-27 Next

Computer component that produces music, speech, or other sounds

Speakers and headsets are common devices

Click to view Web Link, click Chapter 6, Click Web Link from left navigation, then click Wireless Music System below Chapter 6

Speakers, Headphones, and HeadsetsWhat is voice output?

p. 321 - 322 Fig. 6-28 Next

Computer talks to you through speakers on computer Internet telephony allows you to have conversation

over Web

Other Output Devices

What is a facsimile (fax) machine?

p. 322 Fig. 6-29 Next

Device that transmits and receives documents over telephone lines

Other Output Devices

What is a fax modem?

p. 322 Fig. 6-30 Next

Modem that allows you to send and receive electronic documents as faxes

external fax modem

internal fax card in system unit

fax machine

Click to view Web Link, click Chapter 6, Click Web Link from left navigation, then click Fax Modems below Chapter 6

Other Output Devices

What is a multifunction peripheral?

p. 323 Fig. 6-31 Next

Provides functionality of printer, scanner, copy machine, and fax machine

Click to view Web Link, click Chapter 6, Click Web Link from left navigation, then click Multifunction Peripherals below Chapter 6

Other Output Devices

What is a data projector?

p. 323 Fig. 6-32 Next

Device that takes text and images from computer screen and projects them onto larger screen

Other Output Devices

What is force feedback?

p. 324 Fig. 6-33 Next

Sends resistance to device in response to actions of user

Click to view Web Link, click Chapter 6, Click Web Link from left navigation, then click Force Feedback Devicesbelow Chapter 6

Output Devices for Physically Challenged Users

What other output options are available for visually impaired users?

p. 326 Fig. 6-36 Next

Change Window settings, such as increasing size or changing color of text to make words easier to read

Blind users can work with Windows Vista’s Narrator

Braille printer outputs information in Braille onto paper

Fax machines and fax modemsFax machines and fax modems

Summary of Output

Flat-panel displaysFlat-panel displays

CRT monitorsCRT monitors

PrintersPrinters

Speakers, headphones, and earphonesSpeakers, headphones, and earphones

Multifunction peripheralsMultifunction peripherals

Data projectorsData projectors

Force feedback joysticks, wheels, and gamepads

Force feedback joysticks, wheels, and gamepads

Chapter 6 Complete