Glossary
are periodically scanned across a phosphor screen by means of deflection circuitry. A special form of the
cathode-ray tube is the TV and monitor picture tube.
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D
DDC (Display Data Channel)
DDC is a communication channel for displays and computers. The DDC feature allows the monitor
controller to be automatically configured to make optimal use of the display without manual user interaction.
DDC is implemented as part of the new Plug & Play approach introduced into the PC market to increase
user friendliness.
The three levels developed for Plug & play are: (1) DDC1, monitor send data to the PC; (2) DDC2B, PC can
request information from monitor; and (3) DDC2Bi which is a two-way communication - monitor can be
addressed and PC or graphics board can give commands to monitor.
DDC 1/2B
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