Licensing programs

Video disply adjustment and on-screen menu system

a. MultiSync-Monitors

Early video displays were typically "single-frequency" displays: the video adaptor card that operated the display (by sending visual information to the display) used a single horizontal and vertical scanning frequency tuned to that of the display. A video adaptor card produced for a particular "single frequency" display often would not work with other displays. In contrast, with the more flexible devices that are almost exclusively in use today, the same display can be operated by different video adaptor cards and with a wide range of horizonal and vertical scanning frequencies. Such modern video displays are generally referred to as MultiSync-Monitors.

b. Video Display Controls

Almost all MultiSync-Monitors that are in use today provide the user with some form of Video Display Controls, which allow the user to adjust certain parameters and features of the display. In the past such Video Display Controls were typically steered via a panel of knobs and buttons, which were connected to potentiometers or other electrical switches, and which allowed the user to adjust various display parameters (i.e. contrast, brightness, or horizontal and vertical image positions).

c. On Screen Display (OSD)

The adjustment of the various display parameters may be performed with the aid of a so-called On Screen Display, which is typically displayed by pressing a specific knob or button on the monitor. The OSD is displayed on the screen and provides a menu structure by means of which display parameters can be adjusted. A typical OSD used for adjusting the brightness settings of a MultiSync-Monitor is shown in Fig. 1 below.

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Fig. 1: A typical on-screen menu.

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