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14 Reference Infomation

14-2 Terms

Sync Signal
Sync (Synchronized) Signals refer to the standard signals that are required to display desired colors on the
monitor. They are divided into Vertical and Horizontal Sync Signals. These signals display normal color
images by the set resolution and frequency.
Types of Sync Signals
-Separate: This is a scheme of transmitting individual vertical sync signals to the monitor.
-Composite :This is a scheme of combining vertical sync signals into one composite signal and transmitting
it to the monitor. The monitor displays the color signals by separating the composite signal into original color
signals.
Dot Pitch
The image on a monitor is composed of red, green and blue dots. The closer the dots, the higher the reso-
lution. The distance between two dots of the same color is called the 'Dot Pitch'. Unit: mm
Vertical Frequency
The screen must be redrawn several times per second in order to create and display an image for the user.
The frequency of this repetition per second is called Vertical Frequency or Refresh Rate. Unit: Hz
Example: If the same light repeats itself 60 times per second, this is regarded as 60 Hz.
Horizontal Frequency
The time to scan one line connecting the right edge to the left edge of the screen horizontally is called
Horizontal Cycle. The inverse number of the Horizontal Cycle is called Horizontal Frequency. Unit: kHz
Interlace and Non-Interlace Methods
Showing the horizontal lines of the screen from the top to the bottom in order is called the Non-Interlace
method while showing odd lines and then even lines in turn is called the Interlace method. The Non-Interlace
method is used for the majority of monitors to ensure a clear image. The Interlace method is the same as that
used in TVs.
Plug & Play
This is a function that provides the best quality screen for the user by allowing the computer and the monitor
to exchange information automatically. This monitor follows the international standard VESA DDC for the Plug
& Play function.
14-8

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