Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
State Status Definition
D1 Optional This state is not required to be physically different than a D3 state if the device is able
to meet the resume requirement and the driver is able to restore state. It is signaled by
the removal of display output and time expiring. The physical state entered is no
different than D2.
Display retains internal state but may be conserving energy
Video image is blank
Latency to return to D0 must be less than 250 milliseconds
D2 Optional This state is not required to be physically different than a D3 state if the device is able
to meet the resume requirement and the driver is able to restore state. It is signaled by
the removal of display output and time expiring The physical state entered is no
different than D1.
Display retains state but is conserving energy
Video image is blank
Latency to return to D0 is less than 250 milliseconds
D3 Required This state is equivalent to the “Off” state defined in the VESA DPMS specification. It is
signaled by the removal of display output and time expiring
Display is non-functional
Video image is blank
Latency to return to D0 is less than 250 milliseconds
Although 250 milliseconds is shown here because not all devices in this group are fast now, the
target resume for a new device should be 100 milliseconds.
A.6.1.4 Standard TV Devices (and Analog HDTVs)
State Status Definition
D0 Required This state is equivalent to the “On” state for a DPMS device.
Display is fully on
Video image is active
D1 Optional Video image is blank
Latency to return to D0 must be less than 100 milliseconds
D2 Optional Video image is blank
Latency to return to D0 must be less than 100 milliseconds
D3 Required This state is not equivalent to the “Off” state defined in the VESA DPMS specification
because not power is actually saved.
Video image is blank
Latency to return to D0 is less than 100 milliseconds
A.6.1.5 Other (new) Full Screen Devices
Some devices not specifically defined here already exist, such as projectors that emulate CRTs or
HDTVs. Others may be coming. It is important for any device used for full screen display to support
950 April, 2015 Version 6.0