Improved and Standard User Interface for

Power Management

Bruce NordmanLawrence Berkeley National Laboratory

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

May, 2000

sponsor: California Energy Commission

Power Management Controls and Indicators

Overview

• Energy Implications• Facts and Assumptions• Non-Office Eqt. Controls• Office Equipment Controls• Project Elements

Power Management Controls and Indicators

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

Power Management Controls and Indicators

Energy Savings TWh/year $billion/year

Existing 27.1 2.2Potential 16.7 1.3

Current Power Mgmt. Enabling Rates:PCs: 25% Monitors: 60%Printers: 80% Copiers: 70%

Power Management Controls and Indicators

Facts• PC power management enabling rates are

low; other devices could be higher

• PM Controls and Indicators are inconsistent and often confusing or ambiguous

• Potential PC PM savings are increasing

Power Management Controls and Indicators

Assumptions• More understanding of existence and operation

of power management will lead to it being used better and more often.

• Improved and Standard User Interface elements will improve understanding.

• Existence of Standard and advocates for it will lead to adoption of it for new products.

Power Management Controls and Indicators

Our Project• Goal: Save extra energy by getting more use out of

already existing power management capability in office equipment.

• Means: Over a few years achieve a broad similarity of user experience of power management across all office equipment. Do this via a voluntary standard.

Power Management Controls and Indicators

Standard Controls

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Power Management Controls and Indicators

Cars: Gearshifts

Power Management Controls and Indicators

Phones: Number Layout

Power Management Controls and Indicators

Traffic Signs, Indicators

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Power Management Controls and Indicators

Standard International Symbols for Electronics

Power Management Controls and Indicators

Non-standard Controls: Blenders

Power Management Controls and Indicators

Non-Standard ControlsCell Phones

Power Management Controls and Indicators

Office Equipment Power Management Terms

On, Ready, Active, Idle, Standby*, Doze,

Suspend, Sleep, Deep Sleep, Low-Power,

Energy-Saver, Power-Saver, Hibernate,

Energy Star Mode, Weekly Timer, Delay

Timer, Idle Timer, Activity, Inactivity,

Auto-off, Soft-off, Off.

Power Management Controls and Indicators

Office Equipment: What Works

Power Management Controls and Indicators

• Suspend mode is known 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 the terminology is ill-defined. “ (Microsoft)

• There is no distinction between Suspend and Standby in OnNow as there was previously under APM definitions" (Microsoft)

Office Equipment:The “Standby” Problem

Power Management Controls and Indicators

What Doesn’t Work:PC Indicators

Sleep mode Awake

Power Management Controls and Indicators

PM-RelevantIEC Symbols

Save; economize Stand-by

Note: The percentage of economizing may be indicated in the figure.

Power Management Controls and Indicators

Standard PM Interface Elements

• Terms• Symbols/Icons • Indicators• Operating Metaphors

Power Management Controls and Indicators

Project Elements• Scope: Office Equipment -> All Electronics

Initial Phase:• Device Review /

Inventory of Existing Interface Elements

• Institutional Review• Literature Review• Field Research• Summary Reports

Later Phases:• Draft Standard• Industry Review /

Field Research• Revised Standard• Implementation

Power Management Controls and Indicators

Next Steps / NeedsYou provide:• Industry / Organization

Contacts• Advice, Guidance• Review of Results

BNordman@LBL.gov

We do:• Initial Research —

Results to be Published on Web

• Scope out full project plan

http://eetd.LBL.gov/Controls

Power Management Controls and Indicators

Cell Phones