46 Chapter 6 Reference
6-6. Glossary
Clock
The analog input monitor needs to reproduce a clock of the same f requency as the dot clock of the
graphics system in use, when the analog input sig nal is converted to a digital signal for image display.
This is called clock adjustment. If the clock pulse is not set corr ectly, some vertical bars appear on the
screen.
DisplayPort
DisplayPort is a next-generation digital AV interface that allows connection of the PC, audio, imagi ng
devices, etc. to the monitor. One cable can transfer sound wit h images.
DVI (Digital Visual Interface)
DVI is a digital interface standar d. DVI allows direct transmission of the PC’s digital data without loss.
This adopts the TMDS tra nsmission system and DVI connectors. There are two t ypes of DVI connectors.
One is a DVI-D connector for digital signal input only. The other is a DVI-I connector for both d igital and
analog signal inputs.
DVI DMPM (DVI Digital Monitor Power Management)
DVI DMPM is a digital interface power-saving function. T he “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 lter. Red, gre en and blue are the three primary c olors. All
the colors on the screen are displayed by combining these t hree colors. The color tone can be changed by
adjusting the light intensity (volume) passing through each color’s lter.
Gamma
Generally, the monitor brightness varies nonl inearly with the input signal level, which is called “Gamma
Characteristic”. A small gamma value produc es a low-contrast image, while a large gamma value
produces a highcontrast image.