Optimising performance
"Plug and Play"
Monitor implementation of the VESA DDC standard offers the capability of automatic optimisation of monitor performance (“Plug and Play”). In order for automatic optimisation to be effective, the attaching computer must also be hardware and software enabled for DDC operation.
The monitor sends data to the computer. The computer stores the received data, and determines the display mode that best uses the capabilities of the monitor through analysis of this data.
Display Modes
The computer uses software to control the way in which the image is displayed on the screen. This software is supplied as part of your computer operating system (e.g. DOS, OS/2). If a video adapter card is installed, additional software would have been supplied with it.
The way in which the image is displayed on the monitor screen is called the Display Mode and it is governed by two main factors, the Addressability and the Refresh
Rate.
Addressability is the number of horizontal and vertical picture elements (pels) that form the screen image, e.g. 800 x 600.
Refresh Rate is the number of times per second that the screen image is “repainted” by the computer or video adapter card, e.g. 72 Hz.
Display Modes can be either “Interlaced” or “Non- interlaced” (see Glossary).
Your monitor can support a wide range of display modes. For the display modes in Table 1, the screen image has been optimised during manufacture.
Selecting display modes
The display mode that your monitor uses is controlled by the computer. After the computer and the monitor have been turned on, the computer will select a display mode. You may want to use a different display mode, one that produces the best possible screen image for your application.
Ensuring flicker-free operation
If your computer is hardware and software enabled for DDC operation, it will automatically select the highest refresh rate that your monitor and computer support for your selected display mode. If DDC is not enabled, consult your software operating system manual to determine what display modes it can support. Using the necessary software utilities or graphics adapter card, select the highest
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