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LED TVs only need to be calibrated once?

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Old 04-19-2011, 09:42 AM   #1
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Default LED TVs only need to be calibrated once?

Hi all,

I was just told that LED TVs only need to be calibrated once (that is assuming you keep them in the same room w/ same lighting, etc). Is this true? I was told that LEDs don't fade, they just die after years. So as long as your LEDs aren't dead, you can know that your color looks exactly the same as it did immediately after calibrating.

Is this true?

Thanks!
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Old 04-19-2011, 09:50 AM   #2
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Hi all,

I was just told that LED TVs only need to be calibrated once (that is assuming you keep them in the same room w/ same lighting, etc). Is this true? I was told that LEDs don't fade, they just die after years. So as long as your LEDs aren't dead, you can know that your color looks exactly the same as it did immediately after calibrating.

Is this true?

Thanks!
Your set is calibrated for each source and shouldn't require "Re-Calibration" again even if moved to another location, this is for Plasma / LCD / LED. And the possible life of LED read this:
http://www.lcdtvbuyingguide.com/lcdt...lifetime.shtml
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Old 04-19-2011, 11:37 AM   #3
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Thanks for the response! I'm a little confused though... If a TV doesn't have to be calibrated based on the lighting in the room, then why don't TV's ship perfectly calibrated? I assumed it had to do with the TV needing to be calibrated to work with the environment it is used in.
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Old 04-19-2011, 12:00 PM   #4
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Thanks for the response! I'm a little confused though... If a TV doesn't have to be calibrated based on the lighting in the room, then why don't TV's ship perfectly calibrated? I assumed it had to do with the TV needing to be calibrated to work with the environment it is used in.
Professional Calibrators charge an average of $300.00 to calibrate a set. The Manufacturers can't tag that onto to an already expensive panel, that is the reason the have service menu's to allow owners to self calibrate with available disc. and each set must be individually done because your set may not respond to another identical set, that is the reason most threads recommending not using someone else'e settings.
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Old 04-19-2011, 12:06 PM   #5
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Ah, that makes perfect sense! Thanks! So would it be correct to say that a standard LCD TV's color will fade over the years while an LED TV will maintain it's color?
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Old 04-19-2011, 12:42 PM   #6
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Think of it this way, if all the displays were properly calibrated and on the wall, how would the manufacturer differentiate their display from the rest?

The display manufacturer wants their displays to stand out from the rest, which also have to compete with the harsh lighting of the showroom floor.

How do they do that?

Oversaturating color and making their display overly bright (skewing grayscale towards blue also increases perceived light output).

They cannot ask the salesperson to do this, after all, all they do is take it out of the box and plug it in, so they ship these displays in their optimum salesfloor mode, which is why default mode is usually the worst. These setting are not optimum for your home viewing environment, but will draw the consumers eyes towards them and sell displays.

In addition, the display's charactoristics change from the time you take it out of the box until the breakin process (150 - 200 hrs), and your room's lighting conditions will affect how you set gamma, black level and contrast, and room's color scheme will affect how your eyes see the programming on the display, and color and tint must be set accordingly, making it virtually impossible for them to perfectly calibrate the display to your environment.

Displays can drift again overtime. Used to require once a year tuneup, but the digital displays drift less these days.

You can get good results by using a calibration disc and following it's directions, or you can get even better performance by having it professionally calibrated.

It's really up to you, and what you're looking for.
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Old 04-19-2011, 03:40 PM   #7
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Remember that an LED TV is an LCD TV. The only difference is the light source, and LEDs will dim with time
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Old 04-19-2011, 04:23 PM   #8
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Remember that an LED TV is an LCD TV. The only difference is the light source, and LEDs will dim with time
True, but LED has better longevity than normal LCD's (60,000 hrs projected life expectancy) but most of us will have upgraded long before the expiration of the lighting source, it's just the nature of the hobby. I had my XBR4 for a little over a year before I stepped up to the XBR8 ( a little over a year ago) and now I'm already looking into the newer HX929XBR. It's a never ending cycle.
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Old 04-19-2011, 04:26 PM   #9
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True, but LED has better longevity than normal LCD's (60,000 hrs projected life expectancy) but most of us will have upgraded long before the expiration of the lighting source, it's just the nature of the hobby. I had my XBR4 for a little over a year before I stepped up to the XBR8 ( a little over a year ago) and now I'm already looking into the newer HX929XBR. It's a never ending cycle.
Not a cycle but rather an addiction...
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Old 04-19-2011, 05:33 PM   #10
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Not a cycle but rather an addiction...
LOL, then I need rehab !
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Old 04-19-2011, 05:45 PM   #11
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LOL, then I need rehab !
Me too
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Old 04-19-2011, 07:16 PM   #12
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True, but LED has better longevity than normal LCD's (60,000 hrs projected life expectancy) but most of us will have upgraded long before the expiration of the lighting source, it's just the nature of the hobby. I had my XBR4 for a little over a year before I stepped up to the XBR8 ( a little over a year ago) and now I'm already looking into the newer HX929XBR. It's a never ending cycle.
LED's are rated to be 1/2 as bright at their expected lifetime, therefore, at 30000 hours, they will be 1/4 dimmer, at 15000 hours 1/8 dimmer etc.

They WILL change over time, quite the opposite of what the OP has been told.
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Old 04-21-2011, 04:52 PM   #13
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LED's are rated to be 1/2 as bright at their expected lifetime, therefore, at 30000 hours, they will be 1/4 dimmer, at 15000 hours 1/8 dimmer etc.
If the dimming of LEDs was linear, that would be correct; that is, light out put at "eighth-life" would be 12.5% dimmer,
and light out put at "quarter-life" would be about 25% dimmer.

Since the dimming of LEDs is exponential rather than linear, the light output at "eighth-life" is actually closer to 15% dimmer,
and light output at "quarter-life" is actually greater than 30% dimmer.
It should also be noted that the rate at which the light output degrades increases rapidly, being about four times greater at half-life than at "eighth-life".

Of course, that's all academic since the human eye's sensitivity to light is also exponential and typically does not discern changes in light intensity of less than +/- 30%.

Assuming manufacturer's half-life claims are accurate, it's probably reasonable to assume no (humanly) detectable change in light output until one half of the published half-life value.
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Old 07-10-2011, 02:30 AM   #14
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thanks for the tips guys
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Old 03-14-2012, 07:44 AM   #15
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thank you
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