Hi Richard
Can you point me to an article which explains why the Plasma uses more electricity than the LCD?
Thanks
FAQ: Plasma versus LCD - Power!
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pixie
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miller
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Have you tried Google?
http://www.google.com/search?hl=en&q=pl ... sma+vs+lcd
I got these links from a Google Search for "plasma vs LCD energy consumption":
http://reviews.cnet.com/green-tech/tv-power-efficiency/
http://www.lcdtvbuyingguide.com/lcdtv-plasmavslcd.shtml
http://www.crutchfield.com/S-gxVkX8iQIC ... panel.html
http://www.displayblog.com/2009/05/12/p ... vs-plasma/
http://www.hometheatermag.com/gearworks/106gear/
- Miller
http://www.google.com/search?hl=en&q=pl ... sma+vs+lcd
I got these links from a Google Search for "plasma vs LCD energy consumption":
http://reviews.cnet.com/green-tech/tv-power-efficiency/
http://www.lcdtvbuyingguide.com/lcdtv-plasmavslcd.shtml
http://www.crutchfield.com/S-gxVkX8iQIC ... panel.html
http://www.displayblog.com/2009/05/12/p ... vs-plasma/
http://www.hometheatermag.com/gearworks/106gear/
- Miller
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Richard
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I looked around but could not quickly find what I think you are looking for. Miller did find two links that directly apply.
Power Consumption: LCD vs. Plasma
http://www.displayblog.com/2009/05/12/p ... vs-plasma/
I like this article because it points out how unreliable manufacturers specifications can be.
Power!
http://www.hometheatermag.com/gearworks/106gear/#
I like this article because it actually measures some displays and accounts for plasma being a moving target for power consumption.
The difference in power consumption is directly related to how efficiently these technologies create light.
Plasma
Plasma gas is excited by electricity which excites a phosphor. This pretty much correlates with the old CRT except the CRT operates in vacuum and the phosphor is excited by a beam of electrons. Plasma uses different phosphors that work with plasma.
Plasma in volume was used for digital signage in commercial venues. Extremely bright light output was the goal with power consumption at the bottom. With HDTV most manufacturers took those commercial designs and modified them for consumer use. Consumers quickly became aware of how much heat they create and power consumed along with electricity providers. Some countries considered banning plasma technology. Manufacturers went to work taking care of this problem creating a new design for consumers. The two main implementations were more efficient phosphors and gamma manipulation to reduce light output and therefore heat and power. That is pretty much were plasma is now.
Power consumption varies with image content. A 0 IRE field of black requires the least amount of power and a 100 IRE field of peak white requires the most. Gamma manipulation and current power supply limitations force the plasma to output less light the closer you get to that 100 IRE peak white. Due to this you cannot calibrate a plasma with a full field (the response falls apart), requiring a window pattern instead, a small white box in the middle of a black field. The window pattern better reflects the power requirements of the average image and power ratings are supposed to be based on that. Note that just changing the contrast control, reducing or increasing peak light output, will change your power consumption. Many a calibrator has argued that getting rid of the sales mode and defaulting to one of the other modes that actually show a better image would help a lot. Most consumers never change the settings and view the power hungry sales mode.
CRT power consumption is just like plasma; based on image content.
LCD
LCD flat panel is no different than a front or rear projector. A light source is created and the technology either allows light to pass, blocks it, or in the case of DLP sends it somewhere else (the black hole - literally an area of black to absorb the light). LCD flat panel uses florescent lights and like the other technologies mentioned, the light(s) are always on, full blast*.
Power consumption remains the same. Since the light output never varies these products provide optimal dynamic range. In this sense florescent lights and projection lamps are clearly way more efficient than plasma when comparing maximum light output while also providing a performance edge in this area.
LCD can also provide a feature allowing you to turn the florescent lights down saving you some power if you don’t need that much light.
Florescent LCD versus Plasma
For the same size screen consumer plasma models consume slightly more power.
LED LCD
The new kid on the block uses LEDs instead of florescent to back light the LCD panel and LEDs are more efficient than florescent. We are on our first phase of mass LED* production and manufacturers claim they will be able to drop the power some more within about 3 years. LED has also been used by some manufacturers for projection applications to replace the typical arc lamp eliminating lamp replacement and reducing power consumption.
LED LCD versus Plasma
For the same size screen consumer plasma models consume significantly more power. And that’s the plasma rub going forward. Last year the California legislature passed a law outlining maximum power consumption allowed for displays sold in their state. Plasma meets those targets. Unfortunately they will reduce the maximum power again in three years to reflect the next generation of LED LCD arriving at that time. Current plasma design cannot meet those targets without another break through in efficiency.
*There is a sales feature called local dimming to further expand dynamic range. This feature is not used to generate power ratings for the product. This feature is not considered a plus for performance and most will turn it off.
Power Consumption: LCD vs. Plasma
http://www.displayblog.com/2009/05/12/p ... vs-plasma/
I like this article because it points out how unreliable manufacturers specifications can be.
Power!
http://www.hometheatermag.com/gearworks/106gear/#
I like this article because it actually measures some displays and accounts for plasma being a moving target for power consumption.
The difference in power consumption is directly related to how efficiently these technologies create light.
Plasma
Plasma gas is excited by electricity which excites a phosphor. This pretty much correlates with the old CRT except the CRT operates in vacuum and the phosphor is excited by a beam of electrons. Plasma uses different phosphors that work with plasma.
Plasma in volume was used for digital signage in commercial venues. Extremely bright light output was the goal with power consumption at the bottom. With HDTV most manufacturers took those commercial designs and modified them for consumer use. Consumers quickly became aware of how much heat they create and power consumed along with electricity providers. Some countries considered banning plasma technology. Manufacturers went to work taking care of this problem creating a new design for consumers. The two main implementations were more efficient phosphors and gamma manipulation to reduce light output and therefore heat and power. That is pretty much were plasma is now.
Power consumption varies with image content. A 0 IRE field of black requires the least amount of power and a 100 IRE field of peak white requires the most. Gamma manipulation and current power supply limitations force the plasma to output less light the closer you get to that 100 IRE peak white. Due to this you cannot calibrate a plasma with a full field (the response falls apart), requiring a window pattern instead, a small white box in the middle of a black field. The window pattern better reflects the power requirements of the average image and power ratings are supposed to be based on that. Note that just changing the contrast control, reducing or increasing peak light output, will change your power consumption. Many a calibrator has argued that getting rid of the sales mode and defaulting to one of the other modes that actually show a better image would help a lot. Most consumers never change the settings and view the power hungry sales mode.
CRT power consumption is just like plasma; based on image content.
LCD
LCD flat panel is no different than a front or rear projector. A light source is created and the technology either allows light to pass, blocks it, or in the case of DLP sends it somewhere else (the black hole - literally an area of black to absorb the light). LCD flat panel uses florescent lights and like the other technologies mentioned, the light(s) are always on, full blast*.
Power consumption remains the same. Since the light output never varies these products provide optimal dynamic range. In this sense florescent lights and projection lamps are clearly way more efficient than plasma when comparing maximum light output while also providing a performance edge in this area.
LCD can also provide a feature allowing you to turn the florescent lights down saving you some power if you don’t need that much light.
Florescent LCD versus Plasma
For the same size screen consumer plasma models consume slightly more power.
LED LCD
The new kid on the block uses LEDs instead of florescent to back light the LCD panel and LEDs are more efficient than florescent. We are on our first phase of mass LED* production and manufacturers claim they will be able to drop the power some more within about 3 years. LED has also been used by some manufacturers for projection applications to replace the typical arc lamp eliminating lamp replacement and reducing power consumption.
LED LCD versus Plasma
For the same size screen consumer plasma models consume significantly more power. And that’s the plasma rub going forward. Last year the California legislature passed a law outlining maximum power consumption allowed for displays sold in their state. Plasma meets those targets. Unfortunately they will reduce the maximum power again in three years to reflect the next generation of LED LCD arriving at that time. Current plasma design cannot meet those targets without another break through in efficiency.
*There is a sales feature called local dimming to further expand dynamic range. This feature is not used to generate power ratings for the product. This feature is not considered a plus for performance and most will turn it off.