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Introduction

CRT

LCD

Gas Plasma

OLED

Colour Properties

Survey Findings

Conclusion

References

Committee

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Introduction

Display is the most used output device on a computer. Display enables the computer user to see the computer to see the computer’s output like text and images. The display is often referred to as a monitor when it is packaged in a separate case.  

Displays first come in as the blinking green monitors in text-based computer systems in the 1970s, Colour Graphics Adapter (CGA) in 1981, Enhanced Graphics Adapter (EGA) in 1984, Video Graphics Array (VGA) in 1987, Extended Graphics Array (XGA) display in 1990. The table below shows a Video adapter timeline. 

Video Adapter Timeline

Year:

Model:

By:

Max Pixels:

Colors:

Palette:

Type:

Refresh
rate

1981

MDA

Mono Display Adapter

IBM

720x350

2

2

TTL

50 Hz

1981

CGA

Color Graphics Adapter

IBM

160x200

4

16

TTL

60 Hz

1981

RGBI

Red Green Blue Intensity

IBM

640x200

4

16

TTL

60 Hz

1982

HERC

Hercules Display Adapter

IBM

720x348

2

2

TTL

50 Hz

1984

PGA

Professional Graphics Array

IBM

640x480

 

 

Analog

 

1984

EGA

Enhanced Graphics Adapter

IBM

640x350

16

65536

TTL

60 Hz

1987

8514/A

Video Standard for PCs

IBM

1024x768

256

262,000

Analog

43.5 Hz

1987

MCGA

MultiColor Graphics Array

IBM

720x400

256

 

Analog

60Hz

1987

VGA

Video Graphics Array

IBM

320x200

256

262144

Analog

70Hz

1988

VGA

Video Graphics Array

VESA

1600x1200

 

 

DDC

85Hz

1990

XGA

eXtended Graphics Array

IBM

1024x768

16

256

DDC

70 Hz

1990

SVGA

Super VGA

VESA

1600x1200

256

DDC

Analog

60 Hz

1991

EVGA

Extended VGA

VESA

1024x768

256

DDC

Analog

70 Hz

1997

AGP

Accelerated Graphics Port

Intel

2048x1536

16.7 million

 

Digital

100 Hz

Never run your monitor out of spec. If your display is screwed up, there's
a good chance that the frequencies are out, so turn off the monitor!

Table 1: Video Adapter Timeline  

Most computers today support the VGA standard and many VGA monitors are still in use and that most displays sold today support the Ultra Extended Graphics Array (UXGA) standard. UXGA can support palette of up to 16.8 million colors and resolutions of up to 1600 ´ 1200 pixels, depending on the video memory of the graphics card in your computer. The maximum resolution normally depends on the number of colors displayed. For example, your card might require that you choose between 16.8 million colors at 800 ´ 600, or 65,536 colors at 1600 ´ 1200. The four types of display technology used are Cathode Ray Tube (CRT), Liquid Crystal Display (LCD), Gas-Plasma and Organic Light Emitting Diodes (OLED). All of which will be covered in greater details in their respective sections. However, the focus would be on desktop monitors of which CRT and LCD are the current common type used. However, as technology progresses, cheaper and better quality display may replace CRT and LCD as the most commonly used desktops monitors.

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