Robert Crawford, MBA West Middle School

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Presentation transcript:

Robert Crawford, MBA West Middle School Introduction to computers and Information Technology Chapter 3, Input / Output Basics Lesson 3-2, Basic Output Devices Robert Crawford, MBA West Middle School

UNIT O BJECTIVES Essential Question Distinguish among four types of output. Compare and contrast basic output devices. Explain how visual display systems work. Summarize printing technology. Essential Question What types of output devices are best suited to each type of output?

KEY TERMS All-in-One Printer Cathode ray tube (CRT) Impact printer Liquid Crystal Display (LCD) Nonimpact printer Output Device

What Is Output? Page 31

Review (pg. 28) 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

What is output? (pg. 31) 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) Text What is text? 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) Graphics What are graphics? There are four major forms of output. They are: Text Graphics What are graphics?

Is this text or graphics?

What is output? (pg. 31) Video What is video? There are four major forms of output. They are: Text Graphics Video What is video?

What is output? (pg. 31) Audio What is audio? There are four major forms of output. They are: Text Graphics Video Audio What is audio?

Common File Extensions

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

Output Devices Page 32

What is an output device? (pg. 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

Monitors (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

Cathode Ray Tube (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

Liquid Crystal Display (pg. 33) 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

Printers(page 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

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)

UNIT O BJECTIVES 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)

KEY TERMS All-in-One Printer Cathode ray tube (CRT) Impact printer Liquid Crystal Display (LCD) Nonimpact printer Output Device