LED vs. LCD - AVS Forum
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post #1 of 8 Old 09-24-2013, 11:52 AM - Thread Starter
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I'm thinking of getting a new HDTV and I'm not really sure which one to go with. Generally, LED is more expensive so that seems to imply that they're better, but how much better? And in what way are they better? Just curious as I might like to save some money and go with LCD.
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post #2 of 8 Old 09-24-2013, 12:24 PM
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An LED tv is an LCD tv. LED is the type of backlight (CCFL being the other). There's different ways of implementing the backlight, too (full array backlighting vs edge). Plasma is the other general choice other than LCD.

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post #3 of 8 Old 09-24-2013, 12:52 PM
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This forum is for projections screen not flat screen displays, you will get more info if you post in the flat panel forum.
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post #4 of 8 Old 09-24-2013, 02:58 PM
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Quote:
Originally Posted by lovinthehd View Post

An LED tv is an LCD tv. LED is the type of backlight (CCFL being the other). There's different ways of implementing the backlight, too (full array backlighting vs edge). Plasma is the other general choice other than LCD.
You beat me to it I was just going to say " An LED panel is an LCD just different back light "rolleyes.gif

Also good point about this being a projector screen sub forum

I imagine that horse has been beat to death here and other places just goes to show how the marketers can confuse people .


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The Soviet people feared the KGB was watching them through their TV's ........or listening to them through their radios, so they kept them turned off often when they wanted privacy .

Now the NSA/ DHS are in fact watching us with our computers cell phones surveillance cameras drones,satellites etc !
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post #5 of 8 Old 09-25-2013, 11:08 AM - Thread Starter
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So you're saying there's no benefit from having an LED over an LCD or vice versa?
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post #6 of 8 Old 09-25-2013, 12:07 PM
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Quote:
Originally Posted by poweranimals View Post

So you're saying there's no benefit from having an LED over an LCD or vice versa?

No, we're saying the LED is a type of LCD tv, it's not LCD vs LED. The best implementation of LED LCD hdtv is a full array backlight with local dimming (mostly available only in the higher end models). LED LCD tvs that use edge based lighting tend to have some uneven lighting issues. Personally I prefer plasma but there are some plusses and minuses for each LCD and plasma tech for flat panels. Then there's the upcoming OLED technology to consider....

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post #7 of 8 Old 09-25-2013, 02:34 PM
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LED vs LCD does always indicate picture quality as they both use LCD panels in front of the backlight. The older backlight technology CCFL more commonly (and incorrectly ) referred to as LCD , more on that later, are cold cathode fluorescent tube LCD panel backlights sometimes called compact fluorescent tubes . The newer more commonly referred to as LED sets use smaller, more energy efficient Light Emitting Diodes for the LCD panel backlight.

Both types of sets are in fact LCD but differ in the type of panel backlight CCFL (fluorescent tube) or LED (light emitting diode)

LED and LCD are both in fact LCD panels using different types of backlight lamps if you will.
The correct ways to describe them are CCFL/LCD more commonly referred to as LCD , LED/LCD is more commonly referred to as just LED.both in fact are LCD also.
both in fact are LCD also.

All LCD panels must have a backlight as they are passive displays and must have a light source .(think of LCD ,liquid crystal display like a translucent plastic color wheel in front of a lightbulb on steroids but with rapid color changing occurring in milliseconds without a motor or wheel but done electrically in the LCD panel by millions of switching transistors rapidly turning the red /blue and green liquid crystal light filters on or off thus allowing colored or white light through . OTOH Plasma and the older CRT (picture tubes) are emissive phosphorus displays and generate their own light natively and thus do not require backlights .

Both LED and and LCD can be either full back light arrays or edge lit both have advantages and disadvantages . Full array backlighting usually allows for more uniformity
sometimes superior brightness and more control of local dimming sometimes enabling superior contrast in dark backgrounds at least in LED panels. Edge lighting allows for thinner,lighter ,more energy efficient ,lower cost to produce panels , the disadvantages are uniformity,less effective and less accurate local dimming control and "flashlighting" and "clouding ,( areas of visible light or clouding in black backgrounds).
Ideally for best LED picture quality one would want a high density full array local dimming panel (most expensive to produce and thicker than the more common edge lit panels .) these are usually reserved for more expensive LED sets .however newer higher quality edge lit panels are now being being used there also.

More important to picture quality are things like black level,contrast, color saturation and accuracy ,picture detail and brightness Both CCFL/LCD and LED/LCD panels can be made to excel in those areas .

. LED backlights (especially edge light type) are becoming the norm now with the older CCFL being phased out due to energy efficiency and production costs.
As with anything new ofc LED panels usually cost more at first but at least in the case of edge lighting LED panels the production costs are lower and as they have become more common in the market place the manufacturers have been able to amortize their changeover and tooling costs over increasing numbers of LED set sales so they are now cost
competitive with the older CCFL/LCD sets
.
LCD and LED sets should be evaluated on an individual basis for cases of shopping comparisons .




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The Soviet people feared the KGB was watching them through their TV's ........or listening to them through their radios, so they kept them turned off often when they wanted privacy .

Now the NSA/ DHS are in fact watching us with our computers cell phones surveillance cameras drones,satellites etc !
...
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post #8 of 8 Old 09-25-2013, 03:22 PM
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The Soviet people feared the KGB was watching them through their TV's ........or listening to them through their radios, so they kept them turned off often when they wanted privacy .

Now the NSA/ DHS are in fact watching us with our computers cell phones surveillance cameras drones,satellites etc !
...
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