Power Management Controls

1
Power Mode Definitions and User
Interfaces
US TAG - TC 108 / October 4, 2002 Bruce
Nordman Lawrence Berkeley National Laboratory
http//eetd.LBL.gov/Controls
2
LBNL What We Do

• U.S. Department of Energy National Laboratory
• Related to TC 108
• Codes and Standard (Appliances)
• ENERGY STAR Specifications (IT, CE)
• 1-Watt Standby Power Initiative
• TC 59 Standby Power Test Procedure
• User Interface Standard

3
UI Background / Rationale

• Existing Power Management Controls
• Hidden, Confusing (Inconsistent), Absent
• Power Management Enabling Rates Low
• Lots of Wasted Energy
• Poor User Image of Energy Efficiency, Product
  Quality

4
Office Equipment Energy(Annual Electricity
 TWh/year)
No Power Management Now (ENERGY
STAR) Potential(100 Enabling)
1.9B
1.3B
5
Solution

• Create broadly similar interfaces for power /
  power management control across all office
  equipment and consumer electronics
• Accomplish this by creating a voluntary standard
  for interface elements
• Institutionalize the standard through
  international standards, industry standards, and
  marketing to industry
• Expected Result Increased enabling rates and use
  of existing power management capability

6
Existing power-related ISO/IEC Graphical
Symbols For Use On Equipment
Few U.S. residents can identify and define many
of these
7
Structure of Standard

• Static
• Six principles terms, symbols, indicators
• Many overlap with existing standards
• Dynamic
• Nine principles behavior over time
• More akin to design guidelines

8
Three Basic StatesOn, Off, Sleep

• Within a state, device has consistent capability,
  behavior (e.g. state change)
• May have more states, but all mapped into forms
  of the basic three

9
The Term Power

• For indicators, switches/buttons
• Need standard translation
• Possible international word (voice)

10
Power Symbols

• Drop as a symbol.
• Change meaning of from Standby to
  Power
• Symbols and/or Indicators

11
Indicators

• Use Green / Amber / Off for On / Sleep / Off
• Blinking only for transitions or non-power
  meanings
• Possible standard (optional) audio indications

12
SleepMetaphor and Symbol

• Sleep is most compelling metaphor, and has
  clear extensions (e.g. waking up).
• is already common and seems clear

13
Hibernate

• Hibernate is a form of Off
• Need a new term - perhaps off

14
Dynamic Behavior (1)

• ? Use power up to mean turn on or wake up, and
  power down for turn off or go to sleep.
• ? Use flashing green on the power indicator for
  powering up and flashing amber for powering down.
• ? Provide optional audio indications for power
  state transitions.
• ? Alternating green/amber can be used to mean
  error if red is not available.

15
Dynamic Behavior (2)

• ? The power button toggles between the two most
  common power states.
• ? When a device is asleep, pressing the power
  button will (usually) wake it up.
• ? Holding down a power button for an extended
  time will trigger an emergency action.
• ? Usually, when a device is asleep, the input
  causing a wake event should be discarded.
• ? Provide icons to show what types of input may
  be active.

16
Moon Construction

• This use of moon seems OK re Islam

17
Implications

• Hardware
• Protocols (e.g. ACPI, network)
• Software (Operating Systems, Applications)
• Labeling (ENERGY STAR, TCO)
• Standards
• Existing (Symbols, Indicators, Safety, ???)
• New (IEEE, general UI)

18
What TC 108 Can Do

• Endorse the merit of a user interface standard
  (w/ or w/o endorsing its content)
• Forward the interface standard to all appropriate
  committees and working groups
• TC 3, TC 16, ISO 145, JTC1 35, ???
• Consider the terminology for TC 108 standards

19
Possible Discussion

• TC 108 future role
• Safety aspects of power symbols and indicators
• IEEE standard role
• Terminology

20
Power Modes

• Power modes occur in
• Consumer usage (colloquial, products)
• Internal Terminology (interfaces, protocols,
  etc.)
• ENERGY STAR Specifications
• Standards (test procedures, UI definitions)
• Other Energy Policy (regulations, energy
  standards)
• For each, may vary widely by product type
• Office equipment, consumer electronics, etc.

21
Power Modes, cont.

• We should strive towards harmonizing
• terms, metaphors, and definitions
• across usage contexts and device types
• With fast evolution, test procedures need to
  anticipate future products and technologies and
  be adaptable
• With devices commonly connected, standards for
  the information environment/context need to be
  part of any test procedures

22
Questions/Comments
23
PC Sample State Diagram
24
(No Transcript)
25
Colors

• Accessibility re Color Deficiency
• Studies for Traffic Signal Lights
• Can specify LEDs that are accessible