Energy Consumpution: LCD, Plasma, CRT, Projector - Blu-ray Forum

Anhslaught · 03-21-2008, 06:30 AM

So....title.

In general, what wastes more energy? LCD, Plasma, CRT, or Projectors?
Rank from least to most.

I'm just wondering because my brother came into my room. I had my LCD on and he was saying, "this TV is hecka hot!". Honestly....I feel the heat but it wasn't THAT hot.

So I said, "Well its not as hot as the CRT I gave you and it saves more electricity." He says, "I don't like your TV". I'm like, "ok......"
His projector is a lot hotter than my TV, when sitting next to it, you can feel the heat blowing in your face. So I was just wondering, if Projectors waste a lot of energy, or is it just hot air?

snoborder351 · 03-21-2008, 07:18 AM

I know my Plasma uses more energy than my old tube tv. Sure it was a 20" POS tv but that's beside the point.

I know it uses more energy because my electric bill is about $10 more than it was last year and the only thing that has changed is the TV. Sure it uses more electricity and I'm probably killing some animal somewhere because of it but it is totally worth it to see Lost in HD...

ryoohki · 03-22-2008, 02:19 PM

I know that projector use between 130 and 210W of power depending on the model, the lamp etc.. there's too many factors....

WickyWoo · 03-22-2008, 06:16 PM

Plasma far and away uses more power

42" set is 400w

Projection uses 160-200w

LCD typically in the mid-high 2s

ManUtd · 03-22-2008, 07:02 PM

I just checked my 60" plasma and it is 536W while the 65" Sharp LCD is 525W. So LCD is definitely more effiicient.

syncguy · 03-23-2008, 05:06 AM

Plasmas switch high voltages (could be about 200 volts) while LCDs switch low voltages (about 12 volts). Hence, plasma definitely consumes more energy than LCD. They generate more heat and they are heavier as well.

In case of projectors, the main component that consumes energy is the lamp. The size of the lamp could vary depending on the projector. Generally, this could vary from about 150 to 200 watts. Some projectors could have high power lamps. e.g. 400W Xenon lamp of VW200.

So it is likely that the projectors are close to plasmas while LCD energy consumption is relatively low.

CRT energy consumption should be lower than plasmas/projectors and are close to LCDs.

Anhslaught · 03-23-2008, 10:24 PM

Oh cool nice to know. So in general from High to low, its Plasmas, Projectors, CRT, then LCD.

I actually didnt know CRT was that close to LCD, always thought that they were even more energy consuming than Plasmas.

Thanks for the info guys.

WickyWoo · 03-24-2008, 12:49 AM

LCD comes after Plasma. Volts and Watts are 2 different things

Plasma, LCD, projector, CRT

syncguy · 03-24-2008, 05:02 AM

LCDs have a backlight and this consumes power in addition to switching low voltage LCD panel. However, I did not think that LCD would consume more power than projectors as the projectors also have an intense lamp (in addition to panels), in some cases the lamp could be high wattage. This is my feeling. I do not have any stats.

It is interesting to see some stats on this.

Wreck · 03-24-2008, 07:41 PM

Les not forget the mighty DLP

syncguy · 03-26-2008, 02:10 AM

Quote:

Originally Posted by BigBLUballz

Les not forget the mighty DLP

I am not sure where DLP will sit. It is interesting to find out whether switching DLP panels would take more energy than LCD (or vice versa). I expect that the lamps of DLP and LCD projectors are close in energy consumption.

Anhslaught · 03-27-2008, 07:14 AM

I kinda figured DLP and LCD would be the same is it not? I actually don't know the difference between the 2. Rear projection TV's are LCDs too arent they? I'm not too sure what the differnce between a Rear Projection and a DLP is to be honest.

So now we got DLP, Plasma, CRT, Projectors, Rear Projectors and LCDs?

Hmmmmmmmmmm.....

syncguy · 03-27-2008, 09:11 AM

Quote:

Originally Posted by Anhslaught

I kinda figured DLP and LCD would be the same is it not? I actually don't know the difference between the 2. Rear projection TV's are LCDs too arent they? I'm not too sure what the differnce between a Rear Projection and a DLP is to be honest.

So now we got DLP, Plasma, CRT, Projectors, Rear Projectors and LCDs?

Hmmmmmmmmmm.....

RPTV could be LCD, DLP, LCOS/SXRD or CRT. In RPTV, the display device, the projecting mechanism or CRTs, are hidden behind the screen inside the box. Due to the special screen material and the relatively smaller screen size, RPTVs are more suitable than front projectors for day time viewing.

I don't have an LCD set handy. My TV is rated at 240w (56" LED DLP RPTV). My friend's 42" plasma is 425w. Here's a Samsung 46" LCD that consumes 330w http://www.directtvs.co.uk/Samsung_4...NS/version.asp

One of the things people forget is that you still need to power the image processing engines inside. LED backlighting will take the power way down on LCDs however. Apparently they've gotten one of their new sets down to 90w

WickyWoo · 03-27-2008, 03:03 PM

Quote:

LCDs have a backlight and this consumes power in addition to switching low voltage LCD panel. However, I did not think that LCD would consume more power than projectors as the projectors also have an intense lamp (in addition to panels), in some cases the lamp could be high wattage. This is my feeling. I do not have any stats.

The size of the panels (very tiny) typically offsets the savings in power.

When you get these large LCD screens going, 40" and up it starts to really go up

syncguy · 03-28-2008, 08:36 AM

Quote:

Originally Posted by WickyWoo

The size of the panels (very tiny) typically offsets the savings in power.

When you get these large LCD screens going, 40" and up it starts to really go up

Okay. This seems to be highly logical.

Husker · 03-28-2008, 01:25 PM

Here are a couple of good websites that compare: http://reviews.cnet.com/4520-6475_7-6400401-3.html - and - http://www.energystar.gov/ia/partner...arch012006.pdf

Hope this helps.

syncguy · 03-31-2008, 02:16 PM

Another study on energy efficiency of different display types. Unfortunately dlps are not included.

According to this study, energy consumption from high to low:
plasma, front projectors, lcd and crt.

http://www.energyrating.gov.au/libra...harrington.pdf

When screen size is less than 100 cm lcds are better than projectors. This study has used 2004 material. Current technology could be somewhat different.

guitarist155 · 04-03-2008, 03:29 PM

ok it depends on size. under 19-20in from most to least is crt,plasma,lcd.

then over about 24in most to least it's plasma,lcd,crt, front projector, rptv

soccrstar · 04-04-2008, 01:50 AM

my 37" LCD uses 203W

03-21-2008, 06:30 AM	#1
Anhslaught Member Member since:Nov 2007 Blu-ray collection:105	Energy Consumpution: LCD, Plasma, CRT, Projector So....title. In general, what wastes more energy? LCD, Plasma, CRT, or Projectors? Rank from least to most. I'm just wondering because my brother came into my room. I had my LCD on and he was saying, "this TV is hecka hot!". Honestly....I feel the heat but it wasn't THAT hot. So I said, "Well its not as hot as the CRT I gave you and it saves more electricity." He says, "I don't like your TV". I'm like, "ok......" His projector is a lot hotter than my TV, when sitting next to it, you can feel the heat blowing in your face. So I was just wondering, if Projectors waste a lot of energy, or is it just hot air?

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03-21-2008, 07:18 AM	#2
snoborder351 Member Member since:Aug 2007 Location:Seattle, WA Blu-ray collection:18	I know my Plasma uses more energy than my old tube tv. Sure it was a 20" POS tv but that's beside the point. I know it uses more energy because my electric bill is about $10 more than it was last year and the only thing that has changed is the TV. Sure it uses more electricity and I'm probably killing some animal somewhere because of it but it is totally worth it to see Lost in HD...

03-22-2008, 02:19 PM	#3
ryoohki Blu-ray Samurai Member since:May 2007 Home Theater Gallery:6 Blu-ray collection:6 Blu-ray reviews:8 Trading Score:5	I know that projector use between 130 and 210W of power depending on the model, the lamp etc.. there's too many factors....

03-22-2008, 06:16 PM	#4
WickyWoo Blu-ray Champion Member since:May 2007 Trading Score:2	Plasma far and away uses more power 42" set is 400w Projection uses 160-200w LCD typically in the mid-high 2s

03-22-2008, 07:02 PM	#5
ManUtd Blu-ray Count Top contributor Member since:Feb 2008 Location:In my HT Home Theater Gallery:1 4K collection:15 Blu-ray collection:829 Blu-ray reviews: 5 Trading Score:5	I just checked my 60" plasma and it is 536W while the 65" Sharp LCD is 525W. So LCD is definitely more effiicient.

03-23-2008, 05:06 AM	#6
syncguy Blu-ray Guru Member since:Mar 2008	Plasmas switch high voltages (could be about 200 volts) while LCDs switch low voltages (about 12 volts). Hence, plasma definitely consumes more energy than LCD. They generate more heat and they are heavier as well. In case of projectors, the main component that consumes energy is the lamp. The size of the lamp could vary depending on the projector. Generally, this could vary from about 150 to 200 watts. Some projectors could have high power lamps. e.g. 400W Xenon lamp of VW200. So it is likely that the projectors are close to plasmas while LCD energy consumption is relatively low. CRT energy consumption should be lower than plasmas/projectors and are close to LCDs.

03-23-2008, 10:24 PM	#7
Anhslaught Member Member since:Nov 2007 Blu-ray collection:105	Oh cool nice to know. So in general from High to low, its Plasmas, Projectors, CRT, then LCD. I actually didnt know CRT was that close to LCD, always thought that they were even more energy consuming than Plasmas. Thanks for the info guys.

03-24-2008, 12:49 AM	#8
WickyWoo Blu-ray Champion Member since:May 2007 Trading Score:2	LCD comes after Plasma. Volts and Watts are 2 different things Plasma, LCD, projector, CRT

03-24-2008, 05:02 AM	#9
syncguy Blu-ray Guru Member since:Mar 2008	LCDs have a backlight and this consumes power in addition to switching low voltage LCD panel. However, I did not think that LCD would consume more power than projectors as the projectors also have an intense lamp (in addition to panels), in some cases the lamp could be high wattage. This is my feeling. I do not have any stats. It is interesting to see some stats on this.

03-24-2008, 07:41 PM	#10
Wreck Blu-ray Guru Member since:Jan 2008 Location:H-town To Indy PSNetwork: HERETOWRECK Trophy Level: (12) Blu-ray collection:249 Blu-ray reviews:7 Trading Score:58	Les not forget the mighty DLP

03-27-2008, 07:14 AM	#12
Anhslaught Member Member since:Nov 2007 Blu-ray collection:105	I kinda figured DLP and LCD would be the same is it not? I actually don't know the difference between the 2. Rear projection TV's are LCDs too arent they? I'm not too sure what the differnce between a Rear Projection and a DLP is to be honest. So now we got DLP, Plasma, CRT, Projectors, Rear Projectors and LCDs? Hmmmmmmmmmm.....

03-28-2008, 01:25 PM	#16
Husker Junior Member Member since:Dec 2007 Location:Nebraska	Here are a couple of good websites that compare: http://reviews.cnet.com/4520-6475_7-6400401-3.html - and - http://www.energystar.gov/ia/partner...arch012006.pdf Hope this helps.

03-31-2008, 02:16 PM	#17
syncguy Blu-ray Guru Member since:Mar 2008	Another study on energy efficiency of different display types. Unfortunately dlps are not included. According to this study, energy consumption from high to low: plasma, front projectors, lcd and crt. http://www.energyrating.gov.au/libra...harrington.pdf When screen size is less than 100 cm lcds are better than projectors. This study has used 2004 material. Current technology could be somewhat different.

04-03-2008, 03:29 PM	#18
guitarist155 Special Member Top ranked HT gallery Member since:Jan 2008 Location:nashville Home Theater Gallery:45 4K collection:11 Blu-ray collection:134 DVD collection:3 Blu-ray reviews:2 Trading Score:1	ok it depends on size. under 19-20in from most to least is crt,plasma,lcd. then over about 24in most to least it's plasma,lcd,crt, front projector, rptv

04-04-2008, 01:50 AM	#19
soccrstar Member Member since:Jan 2008	my 37" LCD uses 203W

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