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Anil Sharma, Lovely Professional University Unit 3: Overview of Graphics I/O Devices

Unit 3: Overview of Graphics I/O Devices

CONTENTS
Objectives
Introduction
3.1 Input Devices
3.1.1 Interactive Devices
3.2 Output Devices

3.2.1 Display Devices
3.2.2 Random Scan Display
3.2.3 Raster Scan Display Systems
3.3 Printers and Projectors
3.3.1 Printers
3.3.2 Projectors
3.4 Image Persistence

3.5 Resolution
3.5.1 Underscan and Overscan
3.5.2 Aspect Ratio
3.5.3 Measuring Color-depth and Computer Memory
3.5.4 Refresh Rate
3.5.5 The Megapixel Evolution

3.6 Frame Buffer
3.6.1 Types of Frame Buffers
3.7 Logical Functioning of I/O Devices
3.8 Summary
3.9 Keywords
3.10 Self Assessment
3.11 Review Questions
3.12 Further Readings

Objectives
After studying this unit, you will be able to:
• Explain input devices

• Describe interactive devices
• Comprehend output devices
• Define random scan displays
• Comprehend raster scan displays
• Discuss image persistence

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