VESA Display Power Management Signaling

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VESA Display Power Management Signaling (or DPMS) is a standard from the VESA consortium for managing the power supply of video monitors for computers through the graphics card e.g.; shut off the monitor after the computer has been unused for some time (idle), to save power.

History[edit]

DPMS 1.0 was issued by VESA in 1993,[1] and was based on the United States Environmental Protection Agency's (EPA) earlier Energy Star power management specifications. Subsequent revisions were rolled into future VESA BIOS Extensions.

Design[edit]

The standard defines how to signal the H-sync and V-sync pins in a standard SVGA monitor to trigger the monitor's power saving capabilities.

DPMS defines four modes; normal, standby, suspended and off. When in the "off" state some power may still be drawn in order to power indicator lights.

The standard is:

State H-sync V-sync Power Recovery Time[2]
On On On 100% n/a
Stand-by Off On < 80% ~1 Sec.
Suspend On Off < 30W ~5 Sec.
Off Off Off < 8W ~20 Sec.

See also[edit]

References[edit]

  1. ^ PC User Guide: Chapter 8
  2. ^ On a Targa TM 3820 PNLD Monitor

External links[edit]