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New Energy Star Rules Will Change LCD TV Designs

El Segundo, Calif. 
– New U.S. Environmental Protection Agency (EPA) guidelines call for the
energy consumption of some televisions to be cut by as much as two-thirds by
2013, compelling the LCD TV supply chain to implement changes in its products
and components, according to iSuppli.

The EPA’s Energy Star Program Requirements for TVs: Version 3.0,
which went into effect in November 2008, are guidelines that impact on-mode
power consumption limits for televisions.

The EPA believes Version 3.0 of the regulation can reduce energy
demand by millions of kilowatt hours per year. The EPA guidelines for TV
on-mode power limits will grow more stringent over time with Tier-1 limits now
in effect, moving to more restrictive levels during the Tier-2 and Tier-3
phases in 2010 and 2012 respectively.

“While not mandatory, these guidelines are likely to spur major
changes in television design as brands move to maintain the coveted Energy Star
label on their sets,” said Randy Lawson, digital TV and display electronics
senior analyst at iSuppli. “The larger the television size, the more power
consumption should be cut to comply with the guidelines.”

For 26-inch sets, Lawson noted maximum power consumption when the
television is turned on should be reduced to 42.3 watts by 2013, down 52.8
percent from 89.7 watts in 2008. For 50-inch sets, on-mode power consumption
should be reduced to 106.9 watts in 2013, down 66.3 percent from 317.5 watts in

The attached figure presents the EPA’s on-mode power limitations
for televisions in the coming years as well as the schedule for phasing in
different tiers of power-consumption limits for TV makers.

Television power consumption is soaring mainly due to the
transition from CRT to LCD display technology, as well as the resultant shift
to larger screen sizes.

At screen sizes smaller than 26 inches, only a small difference
exists between the power consumption of the two television types. However,
LCD-TVs in the popular 37-, 40-, 42- and 50-inch sizes have dramatically
greater power consumption than the smaller CRT-TVs, which max out at the
35-inch dimension.

Previous global standards, including earlier versions of the
Energy Star regulations, focused on reducing power consumption only during the
off and standby modes. However, the new requirements focus on the on-mode, in
which televisions consume the most power. The Energy Star Program Requirements
for TVs: Version 3.0 is the first such standard to go into effect, but will be
followed by similar guidelines in other countries.

 “The advent of these more
restrictive government guidelines will have a significant impact on the
development of LCD TV technology and the television supply chain, impacting
panel materials, LCD backlight unit designs and audio/video electronics,”
Lawson said.

While many design changes will occur in television electronics
and OEM-enabled features, including technologies like ambient light sensing to
help facilitate intelligent backlight drive options, the largest gains will
have to come from redesigns of the panel materials and backlight source
electronics. One very effective approach to address the need for on-mode power
reduction will be the adoption of LED backlighting, especially the direct-lit
type, which will can allow for up to 40 percent or more power savings in a
typical 30-inch-or-larger LCD-TV.

Learn more about this topic, entitled, Digital TV Going Green, at