Changes under consideration in ENERGY STAR Displays Version 8.0 Draft 1

Fri, 06/15/2018 - 13:44 -- MrGreen

On May 7, representatives from the U.S. Environmental Protection Agency (EPA) and U.S. Department of Energy (DOE) held a webinar with stakeholders to discuss proposed updates in Draft 1 of ENERGY STAR Displays Version 8.0.

With the ENERGY STAR brand recognized by more than 90% of Americans according to the EPA, goals for Version 8.0 include revising energy efficiency criteria for monitors to recognize top energy-efficient products, understanding if existing criteria capture a wide variety of energy-efficient signage displays, and clarifying test methods.

Informed by a data set including over 900 Version 7.0 certified models, varying in screen sizes and features, Draft 1 of Version 8.0 proposes changes in the following three areas:

  1. More stringent criteria on monitors
  2. Specification language edits
  3. Test method updates

Increased stringency on monitors is achieved through an overall decrease in Area coefficients and Intercept values, used in calculating the Total Energy Consumption (TEC) base limit across a range of screen sizes.  In addition, there are lower allowances for Enhanced Performance Displays (EPD) and a lower allowance per megapixel (MP) of screen resolution.  Version 8.0 Draft 1 proposes 1.3 W (3.99 kWh) per MP instead of 2 W (6.132 kWh).  Furthermore, no separate allowance is required at higher resolutions.  For EPD allowances, Version 7.0 EPD criteria are maintained, but the allowances for the different tiers of Color Gamut support are decreased, from 15% (V7) to 5% (V8) for EPD 1 and from 65% (V7) to 15% (V8) for EPD 2.  Although the energy allowance for Automatic Brightness Control (ABC) is maintained at 5%, there is some relaxation from 15% (V7) to 20% (V8) on the allowance for products with Touch Technology active in On Mode.

Regarding specification language edits, there are clarifications on the definition of Occupancy Sensor and on the treatment of peripheral devices.  The EPA is proposing a minor clarification to the definition of Occupancy Sensor with an updated note to expand detection of human presence to include a combination of human presence and a signaling device such as a Bluetooth device.

For test method updates, clarification is provided on how to treat the power drawn from the unit under test (UUT) to power other devices during On Mode testing.  If any device, including the host machine, draws power from the UUT, then the power drawn shall be included in the On Mode power measurement.  For On Mode testing, the EPA and DOE are also proposing an additional requirement in Section 6.3A to ensure that the luminance level is maintained during On Mode testing.  The draft test method can be found here.

Finally, given the low market penetration (13%) of ENERGY STAR signage displays in 2016, Version 8.0 Draft 1 proposes maintaining the existing Version 7.0 criteria.

Webinar slides and related materials are available on the Displays Web page: