Introduction to computers and Information TechnologyChapter 3, Input / Output Basics

Lesson 3-2, Basic Output Devices

Robert Crawford, MBAWest Middle School

Distinguish among four types of output. Compare and contrast basic output devices. Explain how visual display systems work. Summarize printing technology.

UNIT O BJECTIVES

Essential QuestionWhat types of output devices are best suited to each type of output?

All-in-One Printer Cathode ray tube (CRT) Impact printer Liquid Crystal Display

(LCD) Nonimpact printer Output Device

KEY TERMS

What Is Output?Page 31

This is a good place to start, what is input?◦ Input is any kind of information, or instructions,

that are put into the computers memory.

◦ Remember how I put that in the notes

On the left we wrote Info & ins ⇒ comp

Review (pg. 28)

Remembering what input is, what is output? Output is processed data provided by the

computer.◦ There are four major forms of output. What are

they? Text Graphics Video Audio

What is output? (pg. 31)

◦ Just as there are four major forms of input, there are four major forms of output. They are: Text

What is text?

What is output? (pg. 31)

◦ There are four major forms of output. They are: Text

Graphics What are graphics?

What is output? (pg. 31)

Is this text or graphics?

◦ There are four major forms of output. They are: Text Graphics

Video What is video?

What is output? (pg. 31)

◦ There are four major forms of output. They are: Text Graphics Video

Audio What is audio?

What is output? (pg. 31)

Common File Extensions

◦ There are four major forms of output. They are: Text Graphics Video Audio

◦ How can you identify the type of file (how it will be output) just by looking at the file name?

◦ You can identify the type of file (how it will be output) just by looking at the file name. This is why PowerPoint will not show your Word files. There are several common file extensions.

.exe .xls .xlsx .doc .docx .ppt .pdf .odt .mp4

Common File Extensions

Output DevicesPage 32

So far we have discussed◦ types of output◦ Common file extensions and how they relate to

types of output

Now we will discuss output devices.◦ What is an output device?

An output device is that displays or plays back the result of the computing process in one of the four forms of output.

What is an output device? (pg. 32)

Now we will discuss output devices.◦ An output device is that displays or plays back the

result of the computing process in one of the four forms of output.

We will look at two of the most common types of output devices.◦ What are the two most common types of output

devices? Monitors Printers

What is an output device? (pg. 32)

What is a monitor? A monitor is a hardware device that

receives and shows images on a screen.

What are the two most common types of monitors?◦ CRT◦ LCD

Monitors (pg. 32)

What does CRT stand for?

Cathode Ray Tube (pg. 32)

What is an advantage of the CRT monitor?◦ At a similar price the CRT will provide better

colour control.

What are some disadvantages of the CRT?◦ Heavy◦ Heat◦ High energy usage

Cathode Ray Tube (pg. 32)

What does LCD stand for?

Liquid Crystal Display (pg. 33)

LCD stands for Liquid Crystal Display.

Liquid Crystal Display (pg. 33)

What is an advantage of the LCD display?

Some advantages of the LCD display are:◦ Lighter◦ Uses less power◦ Thiner

Liquid Crystal Display (pg. 33)

What do printers do?◦ Printers produce output on paper.

Which are more common, impact printers or non impact printer?

What are two common types of non impact printers?

Printers(page 33)

Printers produce output on paper.

Two common types of non impact printers are laser and ink-jet printers

Printers(page 33)

One other category of non-impact printers is the all-in-one printer.◦ Why is this device called an all-in-one printer?

Printers(page 33)

One other category of non-impact printers is the all-in-one printer.◦ The all-in-one printer combines several devices in

a single device.

Printers(page 33)

Why have impact printers fallen out of favor?◦ Loud◦ Poor image quality◦ Loud

Printers(page 33)

Just as important, why do some businesses still use impact printers?

Some businesses still use impact printers because:◦ They are reliable◦ Multi-part Forms◦ Tractor feed

Printers(page 33)

Printers(page 33)

Distinguish among four types of output.◦ What are the four types of output?

Compare and contrast basic output devices.◦ What are the two most common types of output

devices? How are they similar? How do they differ?

Explain how visual display systems work.◦ What are some of the advantages of LCD displays

Summarize printing technology.◦ Identify an advantage and a disadvantage of each

type of printer (Laser, ink-jet, impact)

UNIT O BJECTIVES

All-in-One Printer Cathode ray tube (CRT) Impact printer Liquid Crystal Display

(LCD) Nonimpact printer Output Device

KEY TERMS