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Question regarding calibration for LED sets and lamp sets

post #1 of 11
11/26/08 at 6:08pm
Thread Starter 
I am trying to choose between the Sammy hl67a750 LED DLP and the Mits 73736 and a major factor in the decision would have to do with calibration. I have an 8 year old Sammy CRT 52" right now. I am planning to have whichever of these DLP sets I pick, professionally calibrated. I have never had a display calibrated before but I am serious about getting accurate color with my new tv.

My question is do all tvs, even LED, require periodic calibration? Or only lamp sets because of color shifting and fading (and eventually a bulb replacement)? Would an LED set be able to maintain its color better after 1 calibration more than a lamp set, i guess is what i am trying to ask. I would really appreciate any explanation. Thank you!
-Eric.
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post #2 of 11
11/26/08 at 6:13pm
The LED's used for light engines be it a RGB cluster or the White LED's are being doped with phosphor to get the correct spectrum. So yes even LED's will drift over time just like any other display type. LCD’s with CCFL use phosphor, new LCD with LED use phosphor, Plasma uses phosphor and traditional CRT’s. Lamped based systems xenon or UHP will also drift. So a once a year tune up is in order for all display types that are phosphor or lamp based.
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post #3 of 11
11/26/08 at 6:25pm
If it were me, I would opt for the lamp based Samsung DLP's. (A650) Better overall performance.
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post #4 of 11
11/26/08 at 9:25pm
Quote:
Originally Posted by obladioblaeric View Post

I am trying to choose between the Sammy hl67a750 LED DLP and the Mits 73736 and a major factor in the decision would have to do with calibration.

Have they solved the Mitsubishi Light Engine Failures on those sets? Mitsubishi is NOT the TV Company it was several years ago.
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post #5 of 11
11/27/08 at 1:36am
Thread Starter 
Quote:


If it were me, I would opt for the lamp based Samsung DLP's. (A650) Better overall performance.

Hmm, I definitely am looking for the best overall performer with the largest size possible, and if the LED sets still drift as much as a lamp set I would strongly be considering either the Sammy 72a650 or the Mits 73736.

When comparing the 67a750 and 73735 @ BB and CC the Sammy seemed to be more detailed/sharper. I have not seen a 72a650 but am curious if it would be just as good as the 67a750 as far as picture... any comments on that? There is not a lot said about this particular one, though one person that replied to another of my posts said he picked that one over the Mits 735 (but others are saying the darkchip4 is better in the mits' so it is kinda confusing)

btw thanks for the explanation Derek, that really helps.
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post #6 of 11
11/27/08 at 8:01am
Quote:
Originally Posted by Lee Gallagher View Post

If it were me, I would opt for the lamp based Samsung DLP's. (A650) Better overall performance.

Please explain what makes the A650 a better overall performer. I'm not seeing any issues with the A750, other than the bowing issue I had before the set was replaced.
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post #7 of 11
11/27/08 at 8:37am
The LED's tend to drift more than the lamp based making it harder to retain a calibration.
The lamp based have better black levels as well.
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post #8 of 11
11/27/08 at 7:35pm
Quote:
Originally Posted by Lee Gallagher View Post

The LED's tend to drift more than the lamp based making it harder to retain a calibration.
The lamp based have better black levels as well.


Thanks for the response.
While I can't tell you about the LED drift, I can tell you that I've seen no problem with the black levels on my LED set. I've been playing around with my HL61A750 for the last month, it has excellent black levels.
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post #9 of 11
11/27/08 at 8:41pm
Thread Starter 
I am still reading as much as I can to try and come up with a decision.
I was just reading a post discussing the Mits 736 vs the Sammy 67a750 and one member in the forum said this about the Sammy 67a750:

Quote:


Ironically it's the lamp that will change over time affecting the color output. The LED is more consistent over the life. Once it's calibrated properly, white, will look as it supposed to while a lamp will degrade over time and change the color as well. That's one of the reasons a yearly professional calibration is a good idea to adjust for any color shifts. This happened with my current Toshiba DLP. It had shifted toward the green in the year between the initial calibration and when I had it re-calibrated. OF course the re-calibration set everything right again, but as the bulb ages it will probably shift again. Although I'm selling it and replacing it with the Samsung LED DLP.

I am sure I have read through this post a few times before and initially this was what my impression was about the LED sets vs the lamp sets. I guess I just want some clarification on this statement and any more opinions regarding LED vs lamps. Also between the 67a750 /650series and the Mits 73736, if anyone has anything to add about these models that would be very appreciated. Thanks guys & Happy Thanksgiving!
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post #10 of 11
11/27/08 at 8:57pm
I've owned a Samsung DLP for 6 years (2 bulbs), and the color temperature has shifted very little over this time. Certainly less than detectable by the human eye.
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post #11 of 11
11/27/08 at 8:58pm
Samsung is much more accurate, after calibration, as compared to the Mitsubishi.
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