Which is better..? Back or edge lit? - AVS Forum
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post #1 of 12 Old 11-29-2012, 06:13 AM - Thread Starter
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My friend has a 240 hz Visio back lit and I have a 240 hz edge lite Visio......Is his better?
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post #2 of 12 Old 11-29-2012, 07:21 AM
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back lit is better than edge lit
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post #3 of 12 Old 11-29-2012, 11:49 AM
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Quote:
Originally Posted by TroyHR View Post

My friend has a 240 hz Visio back lit and I have a 240 hz edge lite Visio......Is his better?

Define "Better."

A well-designed back-lit set should be capable of out-performing a well-designed edge lit set - probably at least in terms of Uniformity and View Angle, and particularly if the back-lit panel implements a decent Local (Zone) Dimming scheme.

Still, would not be surprised at all if a Well Designed Edge Lit panel outperformed a Cheap (Poorly Designed) Back lit set....
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post #4 of 12 Old 11-29-2012, 01:50 PM
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does it make a difference whether the back light is ccfl or led?

i have never used a lcd/led display

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post #5 of 12 Old 11-29-2012, 06:08 PM
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LED has a slightly different look/worse off-axis performance. CCFL needs a warmup period (15-30 min)/is less bright. Improvement - better blacks - you will only get with the full array local/zone dimming stuff.


Why LED does not mean a better picture
http://reviews.cnet.com/8301-33199_7-57337192-221/why-led-does-not-mean-a-better-picture/
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post #6 of 12 Old 11-30-2012, 03:16 AM
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Do local-dimming LED back-light TVs with local dimming enabled remove details that should have been shown, in order to increase contrast (such as dimming some zones too far to increase the contrast between dark & bright areas)? Do all local dimming TVs do this or just some? Is there a link that shows which have the best local dimming algorithms - ie,. ones that don't remove details that should be shown (if that's what some are doing)? Also, some will have more zones too. Is there a link which goes into all this eg. how many LEDs/zones each TV has, type of LED back-lighting, how good the algorithm is/whether removes details etc.?
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post #7 of 12 Old 11-30-2012, 07:22 AM
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There was an internet article in which the sony xbr8 Local Dimming and the pioneer kuro krp 500 were compared. They included photo's of the stars at night comparison and remarked that several stars disappeared on the xbr8. I do not believe that there has been a drastic improvement in this regard, seems to be a Local Dimming problem.
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post #8 of 12 Old 11-30-2012, 07:32 AM
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Not all full array back lit or edge lit panels are created equal. Everything being equal the full array version should provide better screen uniformity. A good full array panel is more expensive to build which is why the vast majority of panels are edge lit. I don't think you'll find any local dimming panels that are not full array.
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post #9 of 12 Old 11-30-2012, 08:41 AM
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Edge Lit
Edge Lit with Local Dimming
Full Array
Full Array with Local Dimming


LED TVs compared: local dimming, edge lit, and full array
http://reviews.cnet.com/2795-6482_7-399.html
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post #10 of 12 Old 12-02-2012, 12:16 AM
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Quote:
Originally Posted by TroyHR View Post

My friend has a 240 hz Visio back lit and I have a 240 hz edge lite Visio......Is his better?

Plasma. biggrin.gif

In all seriousness I'd prefer the backlit. Case and point look at Samsungs EH6000 compared to ES6100. Nearly identical panels, I wouldn't put either of those in the cheap boat, and IMO the EH6000 outperforms with brightness uniformity, off axis, and black levels. Every pro review I've read on the two gives the EH series the nod as well, unless you absolutely want smart functionally, which is easily obtained through WDTV or etc.

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post #11 of 12 Old 12-04-2012, 05:32 PM
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Quote:
Originally Posted by andy sullivan View Post

Not all full array back lit or edge lit panels are created equal. Everything being equal the full array version should provide better screen uniformity. A good full array panel is more expensive to build which is why the vast majority of panels are edge lit. I don't think you'll find any local dimming panels that are not full array.

Actually from LG the LM6700 series and up are all edge lit local dimming, except for the LM9800 which is a full array with local dimming
From Samsung the ES6900 series and up are also edge lit local dimming, though from what I've gathered they don't truly dim the LED's but rather use video processing to mimic dimming of the LED's.
& From Toshiba the L7200 series is also an edge lit local dimmer

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post #12 of 12 Old 12-06-2012, 08:58 AM
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Edge lit = cheaper, less power consumption & thinner bezel, but poorer brightness uniformity,

Back lit = more expensive, even uniformity, but more power consumption and the resulting wasted heat generated.

Local dimming only really works on full array, but you pay for it.

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