Power Management Controls

ENERGY STAR Monitor MOU, v3

• Introduce Active Power Criterion– watts ≤ 30 + 20 * megapixels

• Reduce / Consolidate Sleep (≤ 4 W)• Introduce Off Power (≤ 2 W)• Strongly Recommend UI Standards• ENERGY STAR / TCO meeting next week

Power Management Controls

Power Management Controls

Bruce NordmanLawrence Berkeley National Laboratory

BNordman@LBL.govhttp://eetd.LBL.gov/Controls

sponsor: California Energy CommissionPublic Interest Energy Research (PIER) Program

Power Management Controls

Overview

• Background• Energy

• Controls

• Scope

• Standard• Static

• Dynamic

• Future Issues

Power Management Controls

Office Equipment Energy UseAnnual Electricity (TWh/year)

No Power Management

Now (ENERGY STAR)

Potential(100% Enabling)

48.8

65.5

92.6

0 20 40 60 80 100

$2.2 billion

$1.3 billion

Power Management Controls

Problem

• Existing Power Management Controls are

• Hidden, Confusing, Absent

• Power Management Enabling Rates Low

Power Management Controls

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

Power Management Controls

Office Equipment:The “Standby” Problem

• Suspend mode is know as standby mode under the Microsoft Windows 98 operating system. For systems with ACPI compliance, suspend mode is known as sleep mode (Dell)

• Stand-by mode - Fully ready to copy but not copying. (ASTM Copier Test Procedure)• “Stand-by - … an optional operating state of minimal power reduction…” (VESA

Standard)• “Standby power - The lowest power mode in which the appliance is plugged in…”

(LBNL-Leaking/Standby Electricity)• “Standby is… the lowest power state where the system is responsive to interrupts…”

(PowerPC Reference Platform)• “Suspend is currently ignored under Windows 95/98 and Windows 2000 because

terminology is ill-defined” (Microsoft)• “There is no distinction between Suspend in OnNow as there was previously under APM

definitions” (Microsoft)

Power Management Controls

Existing power-related ISO/IEC“Graphical Symbols For Use On Equipment”

Can you identify and define each of these?

Power Management Controls

Overall Plan

• Assess Existing Devices

• Develop New Standards (Voluntary)

• Market these to Institutions• Manufacturers (PAC)

• International Standards Organizations

• Industry Institutions

Power Management Controls

Topics: High Priority, #1

• Basic symbols and switches & buttons

• Basic indicators• Changing power states• Transition indicators• Underlying archetype of power

management behavior, including basic terms

Power Management Controls

Topics: High Priority, #2

• Controlled and controlling devices

• Remote indicators and controls

• Composite devices and diversity of low-power modes

• Power management ‘schemes’

• Behavior based on wake event type

• Linked behavior

• Interactions with non-power modes

Power Management Controls

Topics:Medium/Low Priority

• Disability• Culture• Temporary changes• System status after

power failure• Terminology

• Language• Batteries• Role of the term

“ENERGY STAR”• Self-monitoring• Miscellaneous

Power Management Controls

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

Power Management Controls

The Term “Power”

• For indicators, switches/buttons

• Need standard translation

• Possible “international word” (voice)

Power Management Controls

Power Symbols

• Drop as a symbol.

• Change meaning of from “Standby” to “Power”– Symbols and/or Indicators

Power Management Controls

Indicators

• Use Green / Amber / Off for On / Sleep / Off

• Blinking only for transitions or non-power meanings

• Possible standard (optional) audio indications

Power Management Controls

SleepMetaphor and Symbol

• “Sleep” is most compelling metaphor, and has clear extensions (e.g. “waking up”).

• is already common and seems clear

Power Management Controls

Hibernate

• “Hibernate” is a form of “Off”

• Need a new term

Power Management Controls

PC Sample State Diagram

Power Management Controls

Device Behavior(Dynamic)

• Taxonomy of device types

• User expectations

• Device feedback

• Consistency

• Remote controls, indicators

Power Management Controls

• for Power button / indicator

• Green / Amber / Off for power indicator– Blinking for transitions

• Dimming?

• Accessibility?

Bottom Line for Displays

Power Management Controls

Emerging Issues (Displays)

• Display as portal– OLD: input PC Display– NEW: input Display PC– Multiple PCs

• Remote PCs (closet)– Indicator / Power button on display

Power Management Controls

Emerging Issues (Displays)

• More input devices in monitor– Tablet PCs, etc.– Occupancy / Proximity sensors– Voice

• Secondary displays– Adjacent– Distant

Power Management Controls

Questions/Comments

http://eetd.LBL.gov/Controls

Bruce NordmanBNordman@LBL.gov

510-486-7089