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356 posts

Ultimate Geek
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Topic # 105925 14-Jul-2012 11:39 Send private message

Just a question for those in the industry.

My mother was talking to me the other day - as she wanted to upgrade her LCD to a bigger one.  She went to a store and they told her they don't make LCD's anymore.

Could it be that she is misinformed and it is just certain LCD sizes they do not make?

Or could it be she is a older woman and they were trying to sell her the LED's?

Just wanted to get some facts on the technology.  I know it is changing very fast.  I know there isn't too much price difference now in LEDs and LCDS.

I still see them for sale on Harvey Normans and DSE websites.  So hrm...your insights would be much appreciated.






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  Reply # 655443 14-Jul-2012 11:52 Send private message

It is pretty hard to find an LCD these days. Samsung, Sony, Panasonic, Toshiba are all LEDs now, even in the 32".

Technically, they are still LCD, they just have LED backlighting. Samsungs cheaper ones are Direct LED (as opposed to edge lit)



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Ultimate Geek
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  Reply # 655447 14-Jul-2012 11:55 Send private message

Oh is that why they have the LCD/LED in the names...I always wondered why they had both.




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  Reply # 655448 14-Jul-2012 11:55 Send private message

Without going into great detail - you should be aware that "LED" TVs are simply LCD screens that use LED backlighting rather than the CCFL (fluorescent) backlighting used on the "conventional" LCD.  So similar screen technology, but different backlighting technique.  Plenty of info online re pluses/minuses.

EDIT: I'm obviously a slow typist - beaten to the posting punch!





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356 posts

Ultimate Geek
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  Reply # 655453 14-Jul-2012 12:06 Send private message

Thanks for your responses guys. I understand it now.




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  Reply # 655624 14-Jul-2012 17:53 Send private message

LED backlighting also lets them do annoying things like PWM dim it which makes flicker, and turn it off and on between frames, again adding flicker but reducing blur.

In order to qualify for all those energy stars that people obsess over they have to also not allow you to disable the backlight dimming feature on darker scenes, so it makes it all flickery when you have a night scene onscreen, and it means that captions etc will constantly ping-ponging between bright and dim since they seem to be ignored when deciding on the backlight brightness.




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  Reply # 655627 14-Jul-2012 17:56 Send private message

Oh that doesn't sound so good.  Is that related to a particular brand?

I can't stand flickering - it would probably bring on a migraine.




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  Reply # 655629 14-Jul-2012 18:02 Send private message

Samsung and sony are the only 2 that I have had, the samsung seems to do it at a higher frequancy but its still just as annoying, just means you see more images as you look from one side of the screen to the other.

With the backlight on full and all the motion lighting and other options off it only dims down on a significantly dark scene, so its not too annoying, but you still see some fluctuation in brightness even with the OSD's in games onscreen.

Have the opposite problem on my warehouse cheapie TV, its brightness is full all the time and there is nothing to adjust it down. My dell LCD computer monitors are unusable on anything but full brightness.

An easy way to tell is to wave your hand around infront of the screen, if its flickering then you get a trail of hand outlines, if its on solidily then you get a blur. The flicker when dimmed on my PC makes for a hard time using it.




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  Reply # 656993 17-Jul-2012 12:56 Send private message

I thought you could often change the setting for that auto-dimming in the hidden service menus? Obviously depends on the TV in question

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