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OT: It would be really helpful if someone did some Rand tests to determine how much electricity a plasma TV uses.
Plasma vs LCD power consumption shootout
By: Sean Carruthers
A look at how LCD and plasma compare for power consumption
If you're on the hunt for a big flat-screen television, but you're worried about how much electricity they're going to suck back, you may be confused as to which technology to look for. The prevailing wisdom is that plasma screens are power-hungry monsters, but that's not necessarily true in all circumstances.
The reason for this is the different ways that plasma and LCD bring the picture to the screen. With a plasma screen, each pixel element is an individual light source that is illuminated as needed. LCD, on the other hand, always has a backlight running, and rather than lighting up pixels, an LCD monitor will BLOCK them, so the light doesn't get through. That means a relatively steady power consumption for LCD screens, while plasma varies wildly depending on what happens to be on the screen at that given moment.
CFH Labs got in two large-screen televisions of roughly the same size, one LCD (40-inch) and one plasma (42-inch), and hooked them up to a pair of Kill A Watt electricity meters. We then tested the power consumption of these monitors under a variety of conditions, including several solid colours (white, black, red, blue and green), TV static, watching a DVD with a lot of white backgrounds (Atanarjuat), and watching a DVD with a lot of black backgrounds (Battlestar Galactica miniseries). We also tested the two screens overnight, tuned to the same station. Both screens used out-of-the-box colour and brightness settings.
As prevailing wisdom suspects, the plasma monitor consumed more energy under all of the different real-world viewing tests, but the Battlestar Galactica test showed the difference narrowing. Under the solid colour testing, the plasma ate up more energy than the LCD screen except when displaying a solid black screen, where the power consumption of the plasma screen plummeted to about a quarter of its usual use. The plasma screen used the most energy showing a screen with TV static on it, because there's a lot of white, and it's rapidly moving.
For part two of the test, we reset the plasma screen to "super savings" energy mode, and then adjusted the brightness of the LCD screen to match.
Kill A Watt
www.p3international.com
$30
The Kill A Watt is designed to show you how much power you're using on any particular outlet, by sitting between the outlet and the item you're plugging into it. The Kill A Watt measures the voltage, amperage, wattage, Hz and kilowatt hours. We used the Kill A Watt to measure the power draw of our large screen televisions, to see which ones were more efficient, using the watts (current power draw) and kilowatt hours (cumulative power draw over time).
Samsung SP-R4212
www.samsung.com
$1,800
Consumption rating: 280 watts
The SP-R4212 is a 42-inch plasma display, and while it's HD-ready, it's only a 480p display (852x480 pixels). That means 1,226,880 individual pixel elements to turn on and off, each of which requires power. Theoretically, that would mean that an all-white screen would consume the most power but is that the case?
Samsung LN-R408D
www.samsung.com
$3,299
Consumption rating: 285 watts
This 40 inch model has a slightly smaller picture than our 42-inch plasma, but it comes with 720p resolution (1366x768).
Samsung plasma:
standby: 1 watt, 0.06 amps
black screen: 65 watts, 0.58 amps
white screen: 256 watts, 2.23 amps
red screen: 232 watts, 2.02 amps
blue screen: 231 watts, 2.13 amps
green screen: 208 watts, 1.80 amps
static: 311 watts, 2.71 amps
Atanarjuat (2 hr 30 min): 0.69 kilowatt hours
Battlestar Galactica (2 hr): 0.49 kilowatt hours
CNN (overnight): 4.3 kilowatt hours
Samsung plasma (super power saver mode):
standby: 1 watt, 0.06 amps
black screen: 65 watts, 0.58 amps
white screen: 203 watts, 1.76 amps
red screen: 191 watts, 1.7 amps
blue screen: 190 watts, 1.67 amps
green screen: 180 watts, 1.56 amps
static: 251 watts, 2.21 amps
Atanarjuat (3 hr): 0.64 kilowatt hours
Battlestar Galactica (3+ hr): 0.67 kilowatt hours
CNN (overnight): 3.97 kilowatt hours
Samsung LCD
standby: 10 watts, 0.17 amps
black screen: 200 watts, 2.55 amps
white screen: 199, 2.58 amps
red screen: 199 watts, 2.57 amps
blue screen: 198 watts, 2.57 amps
green screen: 198 watts, 2.96 amps
static: 264 watts, 3.23 amps
Atanarjuat (2 hr 30 min): 0.57 kilowatt hours
Battlestar Galactica (2 hr): 0.49 kilowatt hours
CNN (overnight): 3.41 kilowatt hours
Samsung LCD (lower-brightness mode)
standby: 10 watts, 0.17 amps
black screen: 196 watts, 2.50 amps
white screen: 195 watts, 2.52 amps
red screen: 196 watts, 2.51 amps
blue screen: 196 watts, 2.52 amps
green screen: 195 watts, 2.51 amps
static: 235 watts, 3.0 amps
Atanarjuat (3 hr): 0.65 kilowatt hours
Battlestar Galactica (3 hr+): 0.72 kilowatt hours
CNN (overnight): 3.84 kilowatt hours
Plasma is superior to LCD. An entry/mid plasma will even look better than higher end LCDs!
I think we've proved countless times that this statement is incorrect
Some may be superior - marginally.
I think we've proved countless times that this statement is incorrect
Some may be superior - marginally.
Mine is discontinued - replaced with thet Samsung C650.
But now we're bringing price in it? Earlier it was the plasma is superior. Period. A entry/mid level plasma will look better than even high end LCDs which - in my opinion - isn't factual. I also don't quite see the massive, day/night differences that people talk about. 2 yeasr back - but not now ...
So going to the earlier statement that entry level plasmas are better than high end LCDs ... Myth busted?![]()
As video editor Geoff Morrison's piece explains, part of the blur perception comes from the fact that, on standard LCDs, frames are frozen on the screen for 1/60th of a second, and then abruptly shift to the next frame. This is called "sample and hold." Other technologies like plasma and DLP don't hold the frame for that whole 1/60th of a second, but pulse from one frame to the next, with some healthy downtime.
Virtually all modern LCD displays are based on driving magnesium called Active Matrix. Active Matrix works by ‘holding’ each frame for a certain period of time before displaying the next. For example, a standard Active-Matrix LCD ‘holds’ each frame for 16.6ms at 60Hz before displaying the next frame, but this leads to retinal persistence. In other words, the image becomes temporarily ‘burned’ in the eye’s retina. If it’s not removed, it will cause blur like effect during motion, (when the ghostly image of the previous frame overlaps with the new frame). To help combat this problem, several manufactures have implemented a picture processing technique known as 100/120Hz (Motion Compensation), which helps to reduce motion blur effectively on (virtually) all modern LCDs. It works by synthesizing new frames from existing frames to reduce hold time by half.
Another method called “Overdrive V2” was recently proposed by a Chinese LCD manufacturing company called Chi-Mei Optronics. The new technology works by slightly dimming the image just before displaying the next. This idea was actually conceived from the old CRT technology. It’s surprising to see how advanced CRT technology really was (and still is). Below the front glass of the CRT lies the phosphor coating. When it’s hit by the electron beam, it becomes ‘excited’ and emits light. The phosphor will continue to emit light for about 1-1.6 milliseconds before it begins to fade, which causes slight flicker but at the same time, it helps to remove the previous image from the eye’s retina. Now you know why there’s no motion blur on your old boob tubes LOL.
PDPs don’t have such problem, because hold time on PDPs is controlled by Pulse Width Modulation (4-6ms). In other words, PWM creates each frame from scrach.
So going to the earlier statement that entry level plasmas are better than high end LCDs ... Myth busted?![]()