Page 15 - DCAP105_WORKSHOP_ON_COMPUTER_HARDWARE_AND_NETWORK

Unit 1: Introduction to Hardware and Software

Notes
Figure 1.9: Two Models of Color Monitors

15" Multimedia Color Monitor 20" Color Monitor
Table 1.1: Comparison among Different Types of Monitors

Type of Display Type Text Resolution Graphics
Monitor Resolution (Pixels)
CGA Text & Graphics Fair quality 320 × 200
MDA Text only Good quality –
HGA Text & Mono Graphics Fair quality 320 × 200
EGA Text & Enhanced Graphics Good quality 640 × 350
VGA Text & Video Graphics Much better than all 640 × 480
SVGA Text & Video Graphics Best quality 1600 × 1280

Video Controller

Also known as a graphics card, video card, video board, or a video controller, a video adapter is
an internal circuit board that allows a display device, such as a monitor, to display images from
the computer.

PC Projector
Figure 1.10: PC Projector

A projector is a device that uses light and lenses to take an image and project a magnified image
onto a larger screen or wall. Projectors can magnify still or moving images depending on how
they are built.

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