Thomson Licensing S.a.

Manfred Muchenberger

Peter E Haferl

Magdy Megied

In a multi-window arrangement, the light output attributable to each window in a multiple window display is calculated, for example, in accordance with the video signal that provides the picture information for display in the window and in accordance with the window area. When the total light output contributed by all the windows exceeds a predetermined level, a loop controller automatically reduces, for example, the contrast and the brightness in selected windows, in accordance with a rule, in a loop control manner. The result is that the total light output drops below the predetermined level.

Multi-window picture adjustment arrangement for a video display

An apparatus comprises a source of a first signal synchronized to deflection, the first signal including a first portion representative of a retrace interval, means coupled to a first video signal and responsive to a second signal representative of the retrace interval for generating a second video signal having a blanking interval, and, means responsive to a third signal representative of the blanking interval and to the first signal for generating the second signal so as to control the phase of the blanking interval relative to the retrace interval.

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Uster, Switzerland

Manfred Muchenberger