ENNERGY STAR® Prrogram Requiremeents
cation forr Displays
Productt Specific
Eligibility Criteria
Draft 2 Version 7.0

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Following is the ENERGY STAR pro
oduct specificcation (“speciffication”) for Displays. A prroduct shall meetall of the identified criteeria if it is to earn the ENER
RGY STAR.

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1 DEF
FINITION
NS

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s:
A) Product Types

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1) Electronicc Display (Display): A pro
oduct with a display screen and asso
ociated electronics,
often enc
cased in a sin
ngle housing,, that as its p rimary functiion produces visual inform
mationfrom (1) a computer, workstation, or server via one or more
e inputs (e.g., VGA, DVI, HDMI,
DisplayPo
ort, IEEE 139
94, USB), (2) external stora
age (e.g., US
SB flash drive, memory carrd), or(3) a netw
work connection.
a) Mo
onitor: An electronic displa
ay intended fo
or one personn to view in a desk basedennvironment.

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b) Siggnage Display: An electron
nic display inttended for mu
ultiple people to view in noon­deesk based env
vironments, such as retail or departmen
nt stores, resttaurants,muuseums, hoteels, outdoor ve
enues, airporrts, conferencce rooms or cllassrooms. Foor thepu
urposes of thiss specificationn, a display s hall be classified as a sign
nage display if itmeeets two or more criteria lis
sted below:

178(1) Diagonal sccreen size is greater than 3 0 inches;

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(2) Maximum Reported Lum
minance is greeater than 400
0 candelas peer square me
eter;
or

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(3) Pixel densitty is less thann or equal to 5 ,000 pixels per square incch.

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Note: Following the pu
ublication of Draft 1, stakeh
holders commmented that deefining signag
ge displays soolely
ys with pixel density less th
han or equal to 5,000 pixells per square inch does noot adequately
as display
capture all signage displays. In particular, there are smaller U ltra High Defiinition modelss that exceed thesity threshold. EPA realizes that the varrious characte
eristics (size, brightness, reesolution) of
pixel densmonitors and signage displays someetimes overla
ap. Therefore,, EPA is prop
posing a set of three criteriaa; aDisplay would have to meet at leastt two to be cla
assified as a S ignage Disp
play.

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EPA is als
so considering additional criteria, such as area greatter than 10 dm
m2 (155 squarre inches), abbilityto performm scaling for use in video walls, unique addressing, rremote-contro
ol disabling, vertical andhorizontall orientation, continuous usse, and netwo
orking, to furth
her distinguissh Signage Diisplays from
Computerr Monitors.

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Finally, EP
PA is also considering definitions basedd on applicatioon such as sp
pecifying thatt Signage Displays
are “desig
gned primarilyy to display information in public areas i ncluding, but not limited too, retail ordepartment stores, restaurants, musseums, confe
erence and me
eeting centerrs, fairs, train or metro stations,airports, school campu
uses or healthhcare organiza
ations for sim
multaneous vie
ewing by morre users” EPA
A
welcomess stakeholder feedback reg
garding produ
uct types and the applicabiility of the pro
oposed criteriaa ors.
any others

378B) Operational Mo
odes:

ENERGY ST
TAR Program Re
equirements for Displays – Draft Eligibility CriteriaaPage 1 of 14

38391) On Mode: The mode in which the display has been activated, and is providing the primaryfunction.

40412) Sleep Mode: A low-power mode in which the display provides one or more non-primary protectivefunctions or continuous functions.

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Note: Sleep Mode may serve the following functions: facilitate the activation of On Mode via
remote switch, internal sensor, or timer; provide information or status displays including clocks;
support sensor-based functions; or maintain a network presence.

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3) Off Mode: The mode where the display is connected to a power source, produces no visual
information, and cannot be switched into any other mode with the remote control unit, an internalsignal, or an external signal.

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Note: The display may only exit this mode by direct user actuation of an integrated power switch
or control. Some products may not have an Off Mode.

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Note: EPA is proposing slightly revised definitions above for On Mode, Sleep Mode, and Off Mode toclarify the types of functions and include notes where helpful. EPA welcomes stakeholder feedback as towhether these modes appropriately capture the operation of displays.

53C) Visual Characteristics:

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551) Ambient Light Conditions: The combination of light illuminances in the environment
surrounding a display, such as a living room or an office.

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572) Automatic Brightness Control (ABC): The self-acting mechanism that controls the brightnessof a Display as a function of Ambient Light Conditions.

58593) Color Gamut: Color gamut area shall be reported in the CIE 1976 u' v' color space per
Section 5.18 Gamut Area of the Information Display Measurements Standard Version 1.03.
Note: EPA received feedback that much of the color information in its dataset reflects the NTSC gamut
designed for analog television where the color space is not consistently noted among models. The
stakeholder suggested EPA define color gamut and require consistent reporting in terms of percentage
of sRGB coverage in the CIE 1976 (u’v’) color space which is more uniform than the CIE 1931 space,reflects the current practice in color science, and helps better differentiate model performance. As
such, EPA proposes that color gamut shall be reported in the CIE 1976 u' v' color space. To minimize
ambiguity and harmonize with the latest industry standards, EPA has additionally referenced theSection 5.18 Gamut Area of the Information Display Measurements Standard Version 1.03 for
guidance on measurement and reporting.

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4) Luminance: The photometric measure of the luminous intensity per unit area of lighttravelling in a given direction, expressed in candelas per square meter (cd/m2).

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a) Maximum Reported Luminance: The maximum luminance the display may attain at
an On Mode preset setting, and as specified by the manufacturer, for example, in theuser manual.

6667b) Maximum Measured Luminance: The maximum measured luminance the display
may attain by manually configuring its controls, such as brightness and contrast.

6869c) As-shipped Luminance: The luminance of the display at the factory default preset
setting the manufacturer selects for normal home or applicable market use.

70715) Native Vertical Resolution: The number of physical lines along the vertical axis of the
Display within the visible area of the Display.

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Note: A display with a screen resolution of 1920 x 1080 (horizontal x vertical) would have a
Native Vertical Resolution of 1080).
6) Screen Area: The visible area of the display that produces images.
Note: Screen Area is calculated by multiplying the viewable image width by the viewable
image height. For curved screens, measure the width and height along the arc of thedisplay.
D) Additional Functions and Features:

791) Bridge Connection: A physical connection between two hub controllers (i.e., USB, FireWire).

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Note: Bridge Connections allow for expansion of ports typically for the purpose of relocating
the ports to a more convenient location or increasing the number of available ports.

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2) Full Network Connectivity: The ability of the display to maintain network presence while in
Sleep Mode. Presence of the display, its network services, and its applications, ismaintained even if some components of the display are powered down. The display canelect to change power states based on receipt of network data from remote network devices,
but should otherwise stay in Sleep Mode absent a demand for services from a remote
network device.

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Note: Full Network Connectivity is not limited to a specific set of protocols. Also referred toas “network proxy” functionality and described in the Ecma-393 standard.

90913) Occupancy Sensor: A device used to detect human presence in front of or in the areasurrounding a display.

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Note: An Occupancy Sensor is typically used to switch a Display between On Mode andSleep Mode.

94954) Touch Technology: Enables the user to interact with a product by touching areas on the
Display screen.

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Note: Per stakeholder comment on Draft 1, EPA has added a revised the definition for Touch Technology
to refer only to technology embedded on the displays screen to exclude any bezel or remote touchcomponents.

991005) Plug-in Module: A modular plugin device that provides one or more of the following functions
without the explicit purpose of providing general computing function:

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a) Display images, mirror remote content streamed to it, or otherwise render content on
the screen from local or remote sources; or103b) Process touch signals.

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Note: Modules providing additional input options are not considered Plug-in Modules for the
purposes of this specification.
Note: EPA has revised the Draft 1 definition of “Internal Processor” to “Plug-in Module” to focus on add­
on modularity and to account for plugin enhancements that might be present in signage displays ormonitors for either rendering images or processing touch signals. This definition is intended to exclude
any processing capability that might meet the threshold of a computer for general computing use, andthus would be considered a computer by the ENERGY STAR Program.

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E) Product Family: A group of product models that are (1) made by the same manufacturer, (2)share the same Screen Area, Resolution, and Maximum Reported Luminance, and (3) of acommon basic screen design. Models within a Product Family may differ from each otheraccording to one or more characteristics or features. For displays, acceptable variations within a
Product Family include:

1161) External housing;1172) Number and types of interfaces;

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3) Number and types of data, network, or peripheral ports; and

1194) Processing and memory capability.

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Note: For clarification, EPA has modified the definition of Product Family slightly to refer to "External
housing" to differentiate it from internal screen components.

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F) Representative Model: The product configuration that is tested for ENERGY STAR certificationand is intended to be marketed and labeled as ENERGY STAR.

124G) Power Source

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1) External Power Supply (EPS): An external power supply circuit that is used to convert
household electric current into dc current or lower-voltage ac current to operate a consumer
product.

1281292) Standard dc: A method for transmitting dc power defined by a well-known technology
standard, enabling plug-and-play interoperability.

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Note: Common examples are USB and Power-over-Ethernet. Usually Standard dc includes
both power and communications over the same cable, but as with the
380 V dc standard, that is not required.

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2 SCOPE

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2.1

Included Products

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2.1.1

Products that meet the definition of a display as specified herein and are powered directly from ac
mains, an External Power Supply, or Standard dc are eligible for ENERGY STAR certification,with the exception of products listed in Section 2.2. Typical products that would be eligible forcertification under this specification include:

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i.

Monitors;

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ii.

Monitors with keyboard, video, and mouse (KVM) switch functionality;

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iii.

Signage Displays; and

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iv.

Signage Displays and Monitors with Plug-in Modules.

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Note: EPA has clarified that products powered via an external power supply are included in the Version
7.0 specification.

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2.2

Excluded Products

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2.2.1

Products that are covered under other ENERGY STAR product specifications are not eligible forcertification under this specification including Televisions and Computers (Thin Clients,
Slates/Tablets, Portable All-in-one Computers). The list of specifications currently in effect can befound at www.energystar.gov/products.

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2.2.2

The following products are not eligible for certification under this specification:

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Products with an integrated television tuner;

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ii.

Displays with integrated or replaceable batteries designed to support primary operation
without ac mains or external dc power, or device mobility (e.g., electronic readers, battery­
powered digital picture frames); and

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Products that must meet Food and Drug Administration specifications for medical devices
that prohibit power management capabilities and/or do not have a power state meeting thedefinition of Sleep Mode.

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Note: Stakeholders expressed support for the above scope exclusions proposed in Draft 1. Per astakeholder suggestion, EPA has further specified the types of battery-powered devices excluded toencompass those that are intended for mobility such as personal computing or communication devices.

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3 CERTIFICATION CRITERIA

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3.1

Significant Digits and Rounding

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3.1.1

All calculations shall be carried out with directly measured (unrounded) values.

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3.1.2

Unless otherwise specified, compliance with specification requirements shall be evaluated using
directly measured or calculated values without any benefit from rounding.

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3.1.3

Directly measured or calculated values that are submitted for reporting on the ENERGY STAR
website shall be rounded to the nearest significant digit as expressed in the corresponding
specification requirements.

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3.2

General Requirements for Monitors and Signage Displays

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3.2.1

External Power Supplies (EPSs): Single- and Multiple-voltage EPSs shall meet the Level VI or
higher performance requirements under the International Efficiency Marking Protocol when tested
according to the Uniform Test Method for Measuring the Energy Consumption of External Power
Supplies, Appendix Z to 10 CFR Part 430.

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i.

Single- and Multiple-voltage EPSs shall include the Level VI or higher marking.

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ii.

Additional information on the Marking Protocol is available
at http://www.regulations.gov/#!documentDetail;D=EERE-2008-BT-STD-0005-0218.

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3.2.2

Power Management:

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i.

Products shall offer at least one power management feature that is enabled by default, andthat can be used to automatically transition from On Mode to Sleep Mode either by aconnected host device or internally (e.g., support for VESA Display Power Management
Signaling (DPMS), enabled by default).

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ii.

Products that generate content for display from one or more internal sources shall have asensor or timer enabled by default to automatically engage Sleep or Off Mode.

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For products that have an internal default delay time after which the product transitions
from On Mode to Sleep Mode or Off Mode, the delay time shall be reported.

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iv.

Monitors shall automatically enter Sleep Mode or Off Mode within 5 minutes of being
disconnected from a host computer.

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Note: Following Draft 1, a stakeholder suggested a 5 minute Sleep Mode following disconnection. EPA
agrees that the stakeholder's suggested requirement of a 5 minute power is unlikely to impact the user
experience, and could save energy, so has included it above.

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3.2.3

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Note: Signage displays typically have higher power levels than consumer monitors and commercial
buildings where signage displays are installed have longer wiring runs than residential buildings.
Therefore, EPA is proposing a 0.7 power factor requirement to ensure products address broader losses
while improving efficiency. Data indicate that signage displays across all sizes and maximum luminancecriteria are capable of meeting this power factor level. EPA welcomes stakeholder feedback on the impactof this proposed requirement.

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3.3

Energy Requirements for Computer Monitors

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3.3.1

The Total Energy Consumption (TEC) in kWh shall be calculated per Equation 1 based on
measured values.

Signage displays shall have a true power factor in On Mode of 0.7 or greater per Part G of
Section 5.2 in the ENERGY STAR Test Method.

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202

Equation 1: Total Energy Consumption Calculation203‫்ܧ‬ா஼ ൌ 8.76 ൈ ሺ0.35 ൈ ܲைே ൅ 0.65 ൈ ܲௌ௅ாா௉ ሻ

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Where:



ETEC is the Total Energy Consumption calculation in kWh;
PON is Measured On Mode Power in watts; andPSLEEP is Measured Sleep Mode Power in watts.

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Note: In Draft 2, EPA is proposing to employ the Total Energy Consumption (TEC) approach introducedin Draft 1 for monitors. Since EPA only has data on the duty cycle for monitors, further below, EPA
proposes maintaining a modal approach for signage displays. The TEC approach proposed for monitors
has been successfully used in the ENERGY STAR Computers, Set-top Box, and Imaging specifications,where it has led to a variety of benefits without losing efficiency gains in low-power modes. In particular, a
TEC approach provides more flexibility for manufacturers to take different design approaches to savingenergy overall, rather than focusing only on single modes. As such, a TEC approach focuses on the totalenergy and cost savings, rather than on specific components.

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Commenters generally supported the use of a TEC approach for monitors as outlined in Draft 1. Somestakeholders, however, expressed concern that a TEC approach could potentially disincentivize future
efficiency gains in low power modes. EPA is sensitive to this point; however, past experience in other
ENERGY STAR product categories suggests that for products with expanding functionalities, a TEC
approach ultimately allows for more stringent requirements than a modal approach in combination withadders. Under a modal limit, as products become more fully featured, the likelihood becomes greater thatmultiple requirements must each be made less stringent to account for the interactions between features.
A TEC approach maintains stringency in limits on power consumption, but the amount of Sleep Mode
allowances become less critical to the overall energy performance of the product. Under a TEC approach,additional efficiency improvements would be needed in On Mode to counter any potential increases inenergy consumption in Sleep Mode. Thus, EPA believes it can set lower TEC levels than would bepossible with a modal approach in combination with adders for energy using features.

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3.3.2

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The Maximum TEC (ETEC_MAX) in kWh for Monitors shall be calculated per Equation 2.
Equation 2: Calculation of Monitor Maximum TEC (ETEC_MAX) in kWh‫்ܧ‬ா஼_ெ஺௑ ൌ 6.13 ൈ ‫ ݎ‬൅ 91 ൈ ‫݄݊ܽݐ‬ሺ0.0016 ൈ ሾ‫ ܣ‬െ 59ሿ ൅ 0.085ሻ ൅ 9
Where:

r = Screen resolution in megapixels;
2
A = Viewable screen area in in ; andThe result shall be rounded to the nearest tenth of a kWh for reporting.

Note: EPA received mixed feedback in response to the On Mode power requirements in Draft 1. Somestakeholders supported EPA’s proposal and advocated that the requirements be made more stringent,
whereas others expressed concern that the requirements were too stringent. In this draft, EPA has
retained an efficiency requirement that is more challenging for larger screens, as proposed in Draft 1.
This approach continues to allow for a good selection of products across all sizes, including those in thelarger sizes, from 35 brands. Since the release of Draft 1, EPA updated its dataset with the latest models
for a total of 1051 (up from 962 models). As such, EPA proposes slightly revised On Mode power levels—
expressed in a TEC approach—that recognize the current top performing 21 percent of products in themarket. EPA seeks to ensure that ENERGY STAR remains a market differentiator for efficiency inmonitors when the specification takes effect in 2016.

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Under the Draft 2 proposal models across all sizes and performance features (resolution, color gamut,
and viewing angle) would be eligible to earn the ENERGY STAR. Despite the lower pass rate of 13
percent in monitors with diagonal screen sizes 19 to 22 inches, EPA notes that many models are very
close to the proposed levels only incremental improvements in efficiency are needed to meet the
proposed criteria. Of note, in assessing its dataset, EPA excluded dc-powered products when developing
the requirement since they were not tested with the Version 7.0 direct dc measurement procedures.

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EPA has maintained the Draft 1 allocation of 2.0 W in On Mode per Megapixel of Total Native Resolution
and translated it into the proposed Total Energy Consumption requirements. The 2.0 W allocation
sufficiently captures models across a wide range of resolutions up to 4k/Ultra High Definition.

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3.3.3

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For all Monitors, Calculated TEC (ETEC) in kWh shall be less than or equal the calculation of
Maximum TEC (ETEC_MAX) with the applicable allowances and adjustments (applied at most once)
per Equation 3.
Equation 3: Total Energy Consumption Requirement for Monitors‫்ܧ‬ா஼ ൑ ሺ‫்ܧ‬ா஼_ெ஺௑ ൅ ‫ܧ‬ா௉ ൅ ‫ܧ‬஺஻஼ ൅ ‫ܧ‬ே ൅ ൅ ‫ܧ‬ைௌ ሻ ൈ ݂݂݁஺஼_஽஼

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Where:


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

3.3.4

ETEC is TEC in kWh calculated per Equation 1;
ETEC_MAX is the Maximum TEC requirement in kWh calculated per Equation 2;
EEP is the enhanced performance display allowance in kWh per Table 2;
EABC is the Automatic Brightness Control allowance in kWh per Equation 5;
EN is the Full Network Connectivity allowance in kWh per Table 3;
EOS is the Occupancy Sensor allowance in kWh per Table 4; andeffAC_DC is the standard adjustment for ac-dc power conversion losses that occur at the device
powering the Display, and is 1.0 for Ac-powered Displays and 0.85 for displays with Standard dc; andThe result shall be rounded to the nearest tenth of a kWh for reporting.

For Monitors contrast ratio of at least 60:1 measured at a horizontal viewing angle of at least 85°
from the perpendicular, with or without a screen cover glass and a native resolution greater thanor equal to 2.3 megapixels (MP), shall add only one of the following Table 1 allowances toEquation 2 if the minimum Color Gamut criteria are met:
Table 1: Calculation of Energy Allowance for Enhanced Performance Displays276
EEP (kWh)Color Gamut Criteria

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Where ETEC_MAX is the Maximum
TEC requirement in kWh.

Color Gamut is sRGB or greater as defined by IEC 61966-2­
1. Alternate color spaces are allowable as long as 99% ormore of defined sRGB colors are supported.

0.25 ൈ ‫்ܧ‬ா஼_ெ஺௑Color Gamut is 96% or greater of Adobe® RGB
Version 2005-05.

0.65 ൈ ‫்ܧ‬ா஼_ெ஺௑

Note: In Draft 1, EPA requested feedback on whether the characteristics currently describing Enhanced
Performance Displays (EPDs) in Version 6.0 were still relevant. EPA did not receive any feedback to thecontrary and therefore proposes to retain the description of enhanced performance displays in Section
3.3.4. In Draft 1, EPA also added a clarification that color space shall be considered, such that “alternate
color spaces are allowable as long as 99 percent or more of defined sRGB colors are supported.”

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Based on stakeholder feedback, for Draft 2 EPA further classified models based on color gamut
performance using the Version 6.0 dataset. Although data were submitted using varying standards(NTSC, sRGB, Adobe RGB), EPA normalized the data to make it comparable by converting thepercentage of the color space of each standard into percentage of the color space of the CIE standard.
EPA welcomes stakeholder feedback on the accuracy of this approach.

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In further reviewing color gamut data, EPA found that nearly half of all monitors in the dataset cover thesRGB color gamut, indicating that this level of performance is no longer limited to a small subset ofpremium models. Holding resolution and area constant, the data indicate that increased color gamut
performance typically requires more power. Models supporting 99 percent or more defined sRGB colors
indicate a need for additional power over models with a smaller color space. Models covering at least 96
percent of Adobe RGB-- an even greater coverage in color space—appear to require more power thanthose where 99 percent or more of defined sRGB colors are supported. EPA is therefore proposing atiered allowance approach for Enhanced Performance Displays based on criteria for color gamut asfollows:

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297- 30 percent allowance for models meeting current EPD criteria with color gamut greater than 99 percent
of sRGB.

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299- 65 percent allowance for models meeting the current EPD criteria with color gamut greater than 99
percent of sRGB and at least 96 percent Adobe RGB.

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Of models that already meet the EPD requirements for contrast ratio and resolution, under EPA’s
proposed approach for EPD allowances based on color gamut, 12 models from four manufacturers out of
the 40 models in EPA’s dataset of enhanced performance displays would continue to qualify. With a 30
percent allowance for EPDs with at least 99 percent sRGB, 28 percent of EPA’s dataset of EPDs would
continue to qualify. With the additional 65 percent allowance for models with at least 96 percent Adobe
RGB, 3 out of 10 models, or 30 percent in the Adobe RGB category, would meet the proposed criteria.
EPA considers that its EPD dataset is reflective of the market given the diversity of intended high-end
uses (entertainment, printing-business models), sizes, and high resolution models.

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Since color performance is a continuous variable (for example, some models are 94 percent Adobe RGB,
101 percent sRGB, 102 percent sRGB) rather than a discrete binary category (Adobe RGB vs. sRGB)EPA seeks feedback on the appropriateness of the binning proposed here. EPA requests additional
stakeholder feedback and data regarding how viewing angle and color and brightness uniformity might
affect power consumption. In particular, EPA is interested in understanding the predominant industry­
accepted standard measurements for viewing angle and uniformity, and how these distinguish premiumfrom entry-level models.

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3.3.5

For monitors with Automatic Brightness Control (ABC) enabled by default, an energy allowance(EABC), as calculated per Equation 5, shall be added to ETEC_MAX, as calculated per Equation 2, if
the On Mode power reduction (RABC), as calculated per Equation 4, is greater than or equal to20%.

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Equation 4: Calculation of On Mode Reduction with ABC Enabled by Defaultܴ஺஻஼ ൌ 100 ൈ ൬
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Where:


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ܲଷ଴଴ െ ܲଵଶ൰ܲଷ଴଴

RABC is the On Mode percent power reduction due to ABC;
P300 is the On Mode power in watts, as measured at an ambient light level of 300 lux in Section 6.4 of
the Test Method; andP12 is the On Mode power in watts, as measured at an ambient light level of 12 lux in Section 6.4 of
the Test Method.

Equation 5: Monitors ABC Energy Allowance (EABC) for Monitors‫ܧ‬஺஻஼ ൌ 0.05 ൈ ‫்ܧ‬ா஼_ெ஺௑
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
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Where:


EABC is the energy allowance for Automatic Brightness Control in kWh; andETEC_MAX is the Maximum TEC in kWh, per Equation 2.

Note: EPA is proposing an incentive for ABC to promote its wider adoption in Displays, as the technology
has proven successful in reducing energy (and thereby extending battery life) in notebook computers, tosuch an extent that it is ubiquitous. However, as the technology is still infrequent among Displays, EPA
seeks more data on settings where Displays will be used, in particular office and outdoor lighting
conditions, as well as how to identify and incentivize ABC usability to ensure real-world savings.

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3.3.6

Products with Full Network Connectivity confirmed in Section 6.7 of the ENERGY STAR Test
Method shall apply the allowance specified in Table 2.
Table 2: Full Network Connectivity Energy Allowance (EN) for Monitors

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EN (kWh)
2.9
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3.3.7

Products tested with an Occupancy Sensor active shall apply the allowance specified in Table 3.
Table 3: Additional Functions Energy Allowance (EOS) for Monitors

344
Type
Occupancy Sensor
EOS
345
346
347
348
349
350

Allowance (kWh)1.7

Note: The proposed Full Network Connectivity and Additional Allowances are consistent with Draft 1, buthave been converted to an annual kilowatt-hour allowance. With Draft 2, EPA is no longer proposing anallowance for touch functionality due to a lack of clarity on whether monitors with touch technology were
tested with it enabled, resulting in insufficient data on which to base an allowance. EPA welcomesstakeholder clarification on whether existing test data in EPA’s dataset accounts for touch functionality
enabled by default and any additional data referencing power consumption related to touch functionality.

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351

3.4

On Mode Requirements for Signage Displays

352

3.4.1

The Maximum On Mode Power (PON_MAX) in watts shall be calculated per Equation 6.

353

Equation 6: Calculation of Maximum On Mode Power (PON_MAX) in Watts for Signage DisplaysP୓୒_୑୅ଡ଼ ൌ ሺ7.5 ൈ 10ିହ ൈ ℓ ൈ ‫ܣ‬ሻ ൅ 82 ൈ ‫݄݊ܽݐ‬ሺ0.001 ൈ ሺ‫ ܣ‬െ 200.0ሻ ൅ 0.1ሻ ൅ 6.0

354
355
356
357
358

Where:

A = Screen Area in square inches; andℓ = Maximum Measured Luminance of the display in candelas per square meter, as measured in
Section 6.2 of the test method.

359
360
361
362
363
364
365

Note: Absent additional data, EPA proposes to retain the luminance allowance (or a capacity measure forluminance) from Draft 1 to account for brighter displays needing additional power. The proposed
luminance allowance accounts for a correlation between energy consumption and increased screen
brightness that scales with size, given that many signage displays are significantly brighter that monitors
or products intended solely for indoor use. EPA has also added a 0.02542 correction to account forluminance expressed in cd/m2 and area in in2 rather than expressing the equation in megacandelas, per
the equation in Draft 1. The resultant allowance of 0.116 per total candela is shown in Equation 6.

366
367
368
369
370
371

In Draft 2, EPA has also corrected an error in the equation for Maximum On Mode Power for Signage
Displays such that the requirement now accurately reflects the performance of the top 25 percent ofsignage products in EPA’s dataset, as was intended in Draft 1. One stakeholder expressed concernedthat an allowance based on as-shipped luminance would incentivize manufacturers to ship displays
brighter. EPA notes that the luminance allowance is based on the Maximum Measured Luminance andtherefore will not affect the As-shipped Luminance value.

372
373

3.4.2

374

Measured On Mode Power (PON) in watts shall be less than or equal the calculation of Maximum
On Mode Power (PON_MAX) with the applicable allowances and adjustments per Equation 7.
Equation 7: On Mode Power Requirement for Signage Displaysܲைே ൑ ܲைே_ெ஺௑ ൅ ܲ஺஻஼

375
376
377
378
379
380

Where:


PON is On Mode Power in watts, as measured in Section 6.3 or 6.4 of the Test Method;
PON_MAX is the Maximum On Mode Power in watts, per Equation 7;
PABC is the On Mode power allowance for ABC in watts, per Equation 8; andThe result shall be rounded to the nearest tenth of a watt for reporting.

381
382
383

3.4.3

For Signage Displays with ABC enabled by default, a power allowance (PABC), as calculated per
Equation 8, shall be added to PON_MAX, as calculated per Equation 7, if the On Mode power
reduction (RABC), as calculated per Equation 4, is greater than or equal to 20 percent.

384
385

Equation 8: Calculation of On Mode Power Allowance for Signage Displays with ABC Enabled by
Defaultܲ஺஻஼ ൌ 0.05 ൈ ܲைே_ெ஺௑
386
387
388
389

390
391
392
393

Where:


PABC is the Measured On Mode Power allowance for ABC in watts; and
PON_MAX is the Maximum On Mode Power requirement in watts.

Note: EPA anticipates savings opportunities resulting from the implementation of Automatic Brightness
Control (ABC) and has proposed an allowance of 5 percent, consistent with its allowance for monitors.
EPA seeks to drive implementation of ABC as a way to deliver additional savings, especially amongproducts that will be used in variable ambient light conditions. EPA welcomes any data on the savings
opportunity and feedback on the proposed ABC allowance.

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394
395

3.5

Sleep Mode Requirements for Signage Displays

396
397
398

3.5.1

Measured Sleep Mode Power (PSLEEP) in watts shall be less than or equal the calculation of
Maximum Sleep Mode Power Requirement (PON_MAX) with the applicable allowances andadjustments (applied at most once) per Equation 9.

399

Equation 9: Sleep Mode Power Requirement for Signage Displaysܲௌ௅ாா௉ ൑ ܲௌ௅ாா௉_ெ஺௑ ൅ ܲே ൅ ܲைௌ

400
401
402
403
404
405
406
407

Where:







408

PSLEEP is Measured Sleep Mode Power in watts;
PSLEEP_MAX is the Maximum Sleep Mode Power requirement in watts per Table 4;
PN is the Full Network Connectivity allowance in watts per Table 5;
POS is the Occupancy Sensor allowance in watts per Table 6; andThe result shall be rounded to the nearest tenth of a watt for reporting.

Table 4: Maximum Sleep Mode Power Requirement (PSLEEP_MAX) for Signage Displays
PSLEEP_MAX(watts)
0.5

409
410
411

3.5.2

412

Products with Full Network Connectivity confirmed in Section 6.7 of the ENERGY STAR Test
Method shall apply the allowance specified in Table 5.
Table 5: Full Network Connectivity Allowance for Signage Displays
PN(watts)
0.5

413
414
415

3.5.3

Products tested with an Occupancy Sensor active shall apply the allowances specified in Table 6.
Table 6: Additional Functions Sleep Mode Power Allowance for Signage Displays
Type

Allowance(watts)Occupancy Sensor
POS
416
417
418
419
420
421

0.3

Note: EPA is no longer proposing an allowance for touch functionality due to a lack of clarity whether
monitors with touch technology were tested with it enabled, resulting in insufficient data on which to basean allowance. EPA welcomes stakeholder clarification on whether existing test data in EPA’s dataset
accounts for touch functionality enabled by default and any additional data referencing power
consumption related to touch functionality

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422

3.6

Off Mode Requirements for all Displays

423
424
425

3.6.1

A product need not have an Off Mode to be eligible for certification. For products that do offer Off
Mode, measured Off Mode power (POFF) shall be less than or equal to the Maximum Off Mode
Power Requirement (POFF_MAX) in Table 7.

426

Table 7: Maximum Off Mode Power Requirement (POFF_MAX)
POFF_MAX(watts)
0.5

427

3.7

Luminance Reporting Requirements

428
429

3.7.1

Maximum Reported and Maximum Measured Luminance shall be reported for all products; As­
Shipped Luminance shall be reported for all products except those with ABC enabled by default.

430
431
432
433

Note: Products intended for sale in the US market are subject to minimum toxicity and recyclability
requirements. Please see ENERGY STAR® Program Requirements for Displays: Partner Commitments
for details.

434

4 TEST REQUIREMENTS

435

4.1

Test Methods

436

4.1.1

Test methods identified in Table 8 shall be used to determine certification for ENERGY STAR.

437

Table 8: Test Methods for ENERGY STAR Certification
Product Type

Test Method

All Product Types andScreen Sizes

Draft 2 ENERGY STAR Test Method for Determining Display
Energy – Rev. Oct-2014

Enhanced Performance
Monitors

International Committee for Display Metrology (ICDM)
Information Display Measurements Standard – Version 1.03

438

4.2

Number of Units Required for Testing

439

4.2.1

One unit of a Representative Model, as defined in Section 1, shall be selected for testing.

440
441
442

4.2.2

For certification of a Product Family, the product configuration that represents the worst-casepower consumption for each product category within the Product Family shall be considered theRepresentative Model.

443

4.3

International Market Qualification

444
445

4.3.1

Products shall be tested for qualification at the relevant input voltage/frequency combination foreach market in which they will be sold and promoted as ENERGY STAR.

446

5 USER INTERFACE

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447
448
449

5.1.1

450
451
452
453
454

Manufacturers are encouraged to design products in accordance with the user interface standard,IEEE P1621: Standard for User Interface Elements in Power Control of Electronic Devices
Employed in Office/Consumer Environments. For details, see http://energy.lbl.gov/controls/.
Note: EPA is reviewing the above User Interface requirements under this specification revision.
In order to better track these data, EPA is proposing that EPA-recognized certification bodies
report to EPA whether or not products they certify comply with the standard. The reporting
requirement would be in the form of a “Yes/No.” EPA welcomes feedback both this proposed
requirement and whether the majority of products today comply with the standard.

455
456

6 EFFECTIVE DATE

457
458
459
460

6.1.1

Effective Date: The Version 6.0 ENERGY STAR Display specification shall take effect on April
15, 2016. To qualify for ENERGY STAR, a product model shall meet the ENERGY STAR
specification in effect on its date of manufacture. The date of manufacture is specific to each unit
and is the date (e.g., month and year) on which a unit is considered to be completely assembled.

Note: EPA intends to finalize Version 7.0 in early summer 2015, where the specification would takeeffect in spring 2016.
461
462
463
464
465

6.1.2

466

7 CONSIDERATIONS FOR FUTURE REVISIONS

467
468
469
470
471

7.1.1

On Mode DC Power Limit: EPA is in interested in considering a separate On Mode Power
Maximum requirement for Standard dc products that does not necessitate an ac-dc conversion
calculation. EPA anticipates these products will become more popular on the market with thelatest USB standard and looks forward to receiving additional direct dc-tested data for theseproducts.

7.1.2

Proxzzzying: EPA is interested in the extent to which display products with network connectivity
and not already connected to a host device could employ proxzzzying to enter low power statesand garner additional energy savings. EPA will continue to monitor the market to determine theapplicability of incentivizing the use of proxzzzying in display products in future revisions to thespecification.

472
473
474
475
476
477

Future Specification Revisions: EPA reserves the right to change this specification should
technological and/or market changes affect its usefulness to consumers, industry, or theenvironment. In keeping with current policy, revisions to the specification are arrived at throughstakeholder discussions. In the event of a specification revision, please note ENERGY STAR
certification is not automatically granted for the life of a model

478

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