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CRT


Used in traditional computers.

Concept of electron guns:
The rear of the CRT holds cylinder that contains one or more electron guns. Most color monitors have three guns in back one of the colors Red, Green & Blue (RGB). This allows the visual production of all colors.

Phosphor Coated Display Screen:
The guns beam a steam of charged electrons onto the phosphor coating. When the coating is hit with the right amount of energy. Light is produced in a pattern of very small dots. There is one dot for each primary color (RGB), & the dots are grouped in patterns close together. The name for a collection of all dots in a specific location is a pixel (which stands or picture element).

Image formation & refresh rates.

Persistence Rate:
How long the phosphorus on the screen remain excited & emit light.

Vertical Refresh Rate:
The time required to complete a vertical pass.

Horizontal Refresh Rate:
The time required to pass once from left to right.

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