Division A On Mode (Guidance on Implementation of IEC 62087)

Below, guidance is provided on using IEC 62087, Ed. 2.0 for measuring large displays' On Mode power. For purposes of determining ENERGY STAR qualification of a product, the below exceptions and clarifications apply.

1. (1)

   Accuracy of Input Signal Levels: Section 11.4.12, "Accuracy of input signal levels," reminds testers that video inputs used for testing should be within ± 2% of reference white and black levels. Section B.2 of Annex B, "Considerations for On (average) mode television set power measurements" describes the importance of input signal accuracy in further detail. EPA and the European Commission would like to emphasize the importance of using accurate/calibrated video inputs during On Mode testing and encourages testers to use HDMI inputs wherever possible.

2. (2)

   True Power Factor: Due to increased awareness of the importance of power quality, Partners shall indicate the true power factor of their displays during On Mode measurement.

3. (3)

   Use of Test Materials for Testing: To measure average On Mode power consumption, Partners should measure 'Po_broadcast' as described in section 11.6.1, "On mode (average) testing with dynamic broadcast-content video signal."

4. (4)

   Testing at Factory Default Settings: In measuring the On Mode power consumption of large displays, EPA and the European Commission are interested in capturing first and foremost the power consumption of products as they are shipped from the factory. Picture level adjustments that need to be made prior to testing On Mode power consumption should be made per section 11.4.8, "Picture level adjustments," if applicable.

   Section 11.4.8 reads: "The contrast and brightness of the television set and the backlight level, if it exists, shall be set as originally adjusted by the manufacturer to the end user. In the case that a setting mode must be chosen on initial activation, the 'standard mode' or equivalent shall be chosen. In the case that no 'standard mode' or equivalent exists, the first mode listed in the on-screen menus shall be selected. The mode used during the test shall be described in the report. 'Standard mode' is defined as 'recommended by the manufacturer for normal home use.'"

   For products shipped with a forced menu where the customer must select upon initial start up the mode in which the product will operate, section 11.4.8 states that testing must be conducted in "standard mode."

   Information relaying that the product qualifies for ENERGY STAR in a specific setting and that this is the setting in which power savings will be achieved will be included with the product in its packaging and posted on the Partner's Web site, where information about the model is listed.

5. (5)

   Testing of displays with Automatic Brightness Control: For this test procedure, high ambient lighting is to be set at 300 lux, while low ambient lighting is to be set at 0 lux, as follows:

   1. (a)

      Set the ambient light level to 300 lux as measured at the face of an ambient light sensor.

   2. (b)

      Measure the high ambient lighting On Mode power consumption, Ph, as described in section 11.6.1, "On mode (average) testing with dynamic broadcast-content video signal."

   3. (c)

      Set the ambient light level to 0 lux as measured at the face of an ambient light sensor.

   4. (d)

      Measure the low ambient lighting On Mode power consumption, Pl, as described in section 11.6.1, "On mode (average) testing with dynamic broadcast-content video signal."

   5. (e)

      Calculate average On Mode power consumption using the equation in section 3.A.3., Displays with Automatic Brightness Control, on page 7 of the specification.