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Chapter 7 Glossary
Clock
The analog signal input monitor needs to reproduce a clock of the same frequency as the dot clock
of the graphics system in use, when the analog signal is converted to a digital signal for image
display. This is called clock adjustment. If the clock pulse is not set correctly, some vertical bars
appear on the screen.
DDC/CI (Display Data Channel/Command Interface)
VESA provides the standardization for the interactive communication of the setting information, etc.
between a PC and the monitor.
DVI (Digital Visual Interface)
DVI is a digital interface standard. DVI allows direct transmission of the PC's digital data without
loss.
This adopts the TMDS transmission system and DVI connectors. There are two types of DVI
connectors. One is a DVI-D connector for digital signal input only. The other is a DVI-I connector
for both digital and analog signal inputs.
DVI DMPM (DVI Digital Monitor Power Management)
DVI DMPM is a digital interface power saving function. The "Monitor ON (operating mode)" and
"Active Off (power saving mode)" are indispensable for DVI DMPM as the monitor's power mode.
Gain
This is used to adjust each color parameter for red, green and blue. An LCD monitor displays the
color by the light passing through the panel color filter. Red, green and blue are the three primary
colors. All the colors on the screen are displayed by combining these three colors. The color tone
can be changed by adjusting the light intensity (volume) passing through each color's filter.
HDCP (High-bandwidth Digital Content Protection)
Digital signal coding system developed to copy-protect the digital contents, such as video, music,
etc.
This helps to transmit the digital contents safely by coding the digital contents sent via the DVI or
HDMI connector on the output side and decoding them on the input side.
Any digital contents cannot be reproduced if both of the equipments on the output and input sides
are not applicable to HDCP system.
Phase
Phase means the sampling timing to convert the analog input signal to a digital signal. Phase
adjustment is made to adjust the timing. It is recommended that phase adjustment be made after
the clock is adjusted correctly.
Range Adjustment
Range adjustment controls the signal output levels to display every color gradation. It is
recommended that range adjustment be made before color adjustment.
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Chapter 7 Glossary
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