Specifications

SVGA
I I
I-11
Power management screen saver
About the screen saver
The Display Power Manager for Windows 3.1 provides a mechanism to control the
amount of power used by a computer's monitor. It provides a total of 5 levels of
power savings.
The first level is a conventional screen saver that turns the screen black and bounces a
logo around. The black screen provides substantial power savings and the animation
lets you know that the computer is still active.
The other four levels of power savings are...
Reduced on mode - Reduced on mode is an optional power saving state that allows the
computer to use some power savings while still fully operational. Currently this is
limited to some portable computers that can lower the power usage on their LCD
displays. This causes some degradation of display quality.
Stand by mode - Stand by mode is an optional power saving state that gives minimal
power savings, but provides the fastest recovery time. It is enabled by blanking the
screen and lowering the horizontal rate to less than 10 Hz with less than a 25% duty
cycle. There is no change to vertical timing.
Suspend mode - Suspend mode is a mandatory state in which substantial power
savings are achieved by the display. The trade off is that recovery times are longer
than from stand by mode. It is enabled by blanking the screen and lowering the
vertical rate to less than 10 Hz with less than a 25% duty cycle. There is no change to
horizontal timing.
Off mode - Off mode provides the highest level of power savings and the longest
recovery times. With this mode the display is actually turned off so that recovery
times are equivalent to switching the monitor on. It is enabled by blanking the screen
and lowering both the horizontal and vertical rates to less than 10 Hz with less than a
25% duty cycle.
They match the power saving modes defined by the VESA VBE/PM (see below)
standard. As you move down from one mode to the next, the amount of power being
saved is greater, but so is the amount of time that it takes for a monitor to recover and
be ready to display data.
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