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Open Roads Forum  >  Technology Corner

 > LCD TV's: florescent back lit, LED edge lit, LED back lit

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daamac

Texas

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Posted: 03/15/12 06:25pm Link  |  Print  |  Notify Moderator

Does anyone know of some sort of average power consumption comparison for each of these LCD TV types?


There's lots of advice and information in forums...
sometimes it is correct.

2011 Jayco 28.5RLS; 2008 Chevy 2500HD Crew Cab; Duramax/Allison; Pullrite 14k Superglide Hitch

Charltons

Battle Ground, WA

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Posted: 03/15/12 06:30pm Link  |  Print  |  Notify Moderator

Power consumption compared

TVs1
Average plasma: 301 watts
Average LCD (standard): 111 watts
Average LCD (LED): 101 watts
Other gear2
PlayStation 3: 197 watts
PlayStation 3 Slim: 96 watts
Xbox 360 Elite (2007): 185 watts
Nintendo Wii: 19 watts
Xbox 360: 187 watts
Average PC: 118 watts
DirecTV HR20 DVR: 33 watts
Nintendo Wii: 19 watts
Slingbox: 9 watts
Wireless router: 7 watts


2012 Dodge Ram 2500 Crew Cab 4X4 TCD
2012 Keystone Sprinter 311BHS


daamac

Texas

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Posted: 03/15/12 07:28pm Link  |  Print  |  Notify Moderator

Thanks for info.

I really had thought (hoped) there would be a bigger difference between LED and florescent lit. My 32" florescent lit LCD gets quite warm, which I interpreted as waste heat from the florescent tubes. So, I thought, surely LED lit would pull way less power. But no?

PHE

USA

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Posted: 03/15/12 07:54pm Link  |  Print  |  Notify Moderator

daamac wrote:

Thanks for info.

I really had thought (hoped) there would be a bigger difference between LED and florescent lit. My 32" florescent lit LCD gets quite warm, which I interpreted as waste heat from the florescent tubes. So, I thought, surely LED lit would pull way less power. But no?


Actually LEDs also get hot (warm) for example some LED lamps have built in heat sinks.

phe

Gdetrailer

PA

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Posted: 03/15/12 07:24pm Link  |  Print  |  Notify Moderator

With LCDs (or any TV) the power consumption is highly dependent on the SIZE of the screen.

For instance I have a 12" wide screen LCD with fluorescent backlight and it is rated at 24W.

I have a 15" widescreen LCD with fluorescent backlight and it is rated at 32W.

So really depends on the size.

Your best bet is to go and compare for yourself.

wcjeep

Tacoma, Wa

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Posted: 03/15/12 08:14pm Link  |  Print  |  Notify Moderator

Back lit LED will have better black than edge lit LED. The Plasma would probably have the best black. The Plasma is also susceptible to burn in.

Gdetrailer

PA

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Posted: 03/16/12 07:31pm Link  |  Print  |  Notify Moderator

daamac writes "I really had thought (hoped) there would be a bigger difference between LED and florescent lit. My 32" florescent lit LCD gets quite warm, which I interpreted as waste heat from the florescent tubes. So, I thought, surely LED lit would pull way less power. But no? "

There is a lot of other electronics contained within a LCD TV which will over time cause the case to become warm to touch.

The fluorescent bulbs used in LCD TVs actually don't give off much heat at all, the inverter(s) which drive the fluorescent lights do give off some heat but in the end not all that much compared to the other electronics.

As mentioned by another poster, LEDs themselves DO give off some heat and higher power LEDS actually REQUIRE heat sinks (IE 1W and above).

Where LEDS excels at is thickness of the TV, LED backlight TVs tend to be considerably thinner.

Wattage wasted? Well I'm not sold that the LEDs are much more energy efficient, perhaps comparing the brightness rating of the TV to compare against the wattage.

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