Plasma vs. LCD Revisited: Screen Glare is Still the Deciding Factor
Posted by Carlton Bale on 27th August 2007
I just ran across an article on DigtalHome.ca [via Engadget HD] singing the praises of Plasma over LCD. Although I agree with most of the points, there are a couple with which I completely disagree. In fact, both of the posts seem to be overly-biased toward plasma, to the point that it is almost misinformation. Here are the points with which I disagree, which are probably major enough to push most people to pick LCD over Plasma.
Screen Glare and Dealing with Ambient Light
Taken from the article:
LCD superior in brighter rooms – simply speaking plasma is glass with white phosphors behind it. The result is that a mirror effect can take place when extremely bright light shines on plasma. This mirror effect can make it more difficult to see the images on the screen under extremely bright situations. This situation often occurs inside a big box retailer’s showroom which can be as much as five times brighter than a typical living room! In your average living room where the ambient light level is much lower there is little need for a “brighter” panel.
In general, plasmas have better pictures than LCD, as long as your viewing environment doesn't make the picture unwatchable. If you windows in your room or light on in your room, the glossy glass front surface of a plasma screen will produce mirror-like reflections that compete with the image being displayed. For birght scenes with a lot of colors, it is distracting. For dark scenes with not so much contrast, it makes a plasma unwatchable.
As for "big box retailers being 5x brighter than a typical living room", this is complete misinformation. Most living rooms have windows and lights; I've never been in a Best Buy, Circuit City, Wal-Mart, Target, or any similar store with outside windows, much less with windows close to the TV display area. In fact, the last Best Buy I visited had panels of dark fabric above the entire TV area to prevent direct glare from the overhead lights. How many living rooms have that?
Cost Comparison
Taken from the article:
Lower cost – this one is self explanatory. Visit your local big box retailer and compare the price of a 50” LCD flat panel or 50” plasma from a major manufacturer and you will find that plasma is less expensive. Why pay more when you don’t need to!
A search of BestBuy.com 50"-59" 1080p panels showed the lowest priced Plasma and LCD being the same at $2999. Of the 6 lowest priced panels, 3 were plasma and 3 were LCD. At 40"-49", there were 34 LCDs on only 1 Plasma, and it wasn't the least expensive. At 58", however, Plasma was less expensive.
Viewing Angle
Taken from the article:
Better viewing angles – when buying LCD televisions’, buyers often encounter the term viewing angle. With LCD televisions, as you move off centre, the contrast levels fall. At a 45 degree angle, contast ratios for an LCD televisions drop 80%. To witness this phenomenon, simply stand in front of an LCD television and slowly move to the side of the room. As you move away from the center the image will appear more washed out because more light is spilling through the plastic shutters. With plasma, the contrast ratio is constant regardless of the viewing angles so the picture looks great regardless of where you are sitting in the room.
This is true for older LCDs, but not with newer panels. I just looked at my Mitsubishi LT-46131 straight-on and at 85 degrees off axis. There was a very slight drop in color accuracy and no noticeable drop in contrast ratio. I fail to see how plasma are greatly superior in this area. If you care about picture quality, sit in front of the screen. But if you do have to sit off-axis, you probably will not notice much, if any, difference for either plasma or LCD.
Conclusion
The recommendations from my previous post stand. If you have windows or a lot of lights in your room, an LCD (almost all have a matte screen finish) is much better than a plasma. Plus, LCDs are generally brighter, giving even more advantage in bright situations. An LCD will give a better picture in bright rooms.
If you have a completely light-controlled room, go for plasma and enjoy the better picture quality that a plasma will yeild in that environment.
Exceptions to this rule: the newest Samsung 71/81 Series LCDs have a glossy glass finish to enhance contrast ratios. Just as with Plasma, this is great for dark rooms and terrible for bright rooms.
Buying Advice: Be sure to turn a display off and evaluate/compare a blank screens for reflections and glare before making a final purchase decision.
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