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Spyder2 & Sony Bravia KDL-40W3100 Backlight IR?

1328 Views 6 Replies 2 Participants Last post by  Michael TLV
Hi all.

Firstly, this forum is awesome, and has helped immensely!

I've been calibrating my Sony LCD with a Spyder2express and HCFR and I have gotten the DeltaE of 6500K down to under 4 from 20% to 100% greyscale.

The issue though is to me it looks really red pumped. I just wondered if the LCD backlight can have an effect on the Spyder? Some people have mentioned that being a problem, but supposedly the LCD baffle cuts the out the unwanted parts of the spectrum.

Perhaps I just have a bad eye, as the CRT I calibrated seems quite red also to me (not as much though). That screen is within 1 DeltaE from 60% to 100%.

Thanks for any help or suggestions!
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Reason ... the probe is not so great with LCD flat panel displays. It can be off by 500 to 800K toward red.

Gotta trust your eyes. The baffle does not do enough to help you.

Better to shoot for 7200K toward blue instead.

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I was afraid that might be the answer.
I got the Spyder thinking I didn't want to trust my eyes. Oh well, I'll give ~7200K a go tonight and see how it looks.

Thanks mate.
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One other question actually... Does this affect the sensor's ability to detect primary and secondary colours? And also, what would be an easy way of verifying I have 6500K when I've taken into account the ~700K shift of the sensor?

That's two questions
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This device really should not be used for doing primaries and secondaries. A spectrometer is needed to more accurately do this.

Verify with an optical comparator. (Light bulb and gray cards)

Verify with a spectrometer.

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Ok. I guess it's the same old, get what you pay for. Well at 7500K it matches the CRT monitor, and now I've calibrated it to that (is within 3 DeltaE of anything 10% or brighter)

And she looks *fantastic*! Thanks again!

One thing I noted though is the heat from the LCD was transferring to the sensor and then back to the LCD and making a "glow". I placed the sensor a small amount away from the panel and it seemed to fix it.

There you go. The pod will work on a CRT so that is your reference. Great that it worked out ... and now you see the draw back of this device on LCD TV panels. On LCD computer monitors, it works a lot better. I surmise that the bulb in the computer monitors is a lot different than what they put in consumer TV sets.

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