Light meter with Sammy LED’s

[Anonymous]

Hi all,

Does anyone have experience using the i1 or Chroma 5 with any of the new Samsung LED’s? I have heard rumors of the LED’s messing with the accuracy of current light meters, but I am curious to see if that is really the case from those who have calibrated them. If it does casue a problem, any suggested work arounds?

Thanks!

Topic

[Anonymous]

I used the chroma 5 on the Sony XBR9 which is a variable LED and it was fine.

If anything, it would not fool the i1 … being a spectro. So try both and see how far off your chroma 5 might be … or not at all.

regards

[Anonymous]

Thanks Michael! I kind of thought so since it is logical, but I was concerned that the LED’s may have a spike(s) at a specific wavelength(s) that would perhaps overload a spectro or at least cause it to read inaccurately. I appreciate the info. I might take a look at a spectroanalysis to see if anything reveals itself.

[Anonymous]

You’d likely find that the tv has less control over this than the equipment. The controls are in digits of 1 … there is no 0.1 fine tune control.

regards

[Anonymous]

I calibrated a 52″ Samsung LED with an i1 Pro and nothing unusual appeared in the data.

[Anonymous]

Can I use a Sencore Color Pro IV for an LED based display? I also have an i1Pro I use for color work. I trust the i1Pro is still good for LED’s but I’m not sure about the CP IV. Thanks.

Vince

[Gregg Loewen]

hi Vince
the answer Michael gave earlier still applies.
Measure with your i1 then the color IV. If they match up then you are all set.

[Anonymous]

I would like to know, Can I use the Sencore Color Pro V & OTC1000 on the samsung LED tv’s RGB tracking work. I have been going to a few peoples house’s that have these tv’s & I would like to do more work on the tv sets then B-C-C-S test patterns. telling to customer my meter is no good here.
becuse I would get a call to come over & do audio work with a -RS- SPL & I would see a LED tv on the wall.

[Anonymous]

Update.
I had a talk with my sales man (with spectracal). he said that I can send in my sencore OTC100 & Colorpro V. He said I will have to ship them To the office in Seattle to have the new LED tables loaded.

[Anonymous]

I now am a owner of this very big tv set.
I was trying to do a calibration with the tv in Movie mode. WARM2
I setup the sencore colorpro OTC1000 started the Calman app to took some readings.
I see that Blue is off the chart & red is way off too. D65 in not close

so I put the sencore Colorpro V on the srceen & took some new readings. NOt any better?
This Samsung TV uses LED’s as the lamp. I was thinking that the color meters need to be updated for the LED flat panel type of tv’s. I am asking can I use these sencore color meters as they are on LED DLP type of tv’s. Or Do I need to send them in to have there tables updated for ALL LED type of displays…

[Anonymous]

On an edge-lit Samsung 6000 and a local-dimming 8500, I found that my older i1 was in the ballpark of my Minolta CS-1000A. Everything from grayscale to CMS was ballpark but not close enough for me and I ended up making changes that were noticable enough. Keep in mind newer i1 Pros are probably closer and I don’t have one to compare.

[Anonymous]

I called my fav SpectraCal’s CalMAN™ sales man Loal W Today & we talked about having my sencore color meters updated. Well we think it is time to pull the trigger. I have paid to have both my OTC1000 & CP5 LED tables loaded in to them & have them calibrated in Seattle, WA. I will be shipping them tommow with RA#’s

[Anonymous]

I just got back my sencore color meters from SpectraCal’s Calibration Lab. they both now have the LED table’s & some papers came with them saying they have passed the Calibration test’s. So I am back in business !!!

[Anonymous]

@Shawn_Byrne 1475 wrote:

Thanks Michael! I kind of thought so since it is logical, but I was concerned that the LED’s may have a spike(s) at a specific wavelength(s) that would perhaps overload a spectro or at least cause it to read inaccurately. I appreciate the info. I might take a look at a spectroanalysis to see if anything reveals itself.

The i1 pro only has 10nm resolution, so it depends on how narrow and exactly where the spike is. It certainly does, in theory, the ability to miss part of the reading. Clearly, Profling helps when you have a reference to go off of, but then one has to assume that all LEDs and Screens are made the same and exhibit the same spectral response. Futhermore, does the doping process of the LEDs change the spectral signature over time?

There is clearly debate as to how/which filter based meters will work with LEDs (or Laser etc) so I’ve learned its usually better to stay out of that minefield as it only tends to upset owners of those meters.

Obviously, the best solution is a SpectralRadioMeter with 1nm resolution, the downside is those are few and far between – such as the high end Minoltas that no one would take into the field, the ProgressLab microspec and the PhotoResearch units, being the ones that come to mind.

[Anonymous]

Actual Samsung TV – NOT LED, but Plasma

Top graph shows 10nm resolution (same as i1 Pro).

Bottom shows 1nm resolution (Top of the line Minolta Spectros, ProgressiveLabs Microspec and PhotoResearch units).

Besides the obvious difference on which spike is greater (red v green), note the actual Spectral Radiance Scale on the left.

This might very well explain why some report the Chroma 5 hockey puck to be better with Plasmas than an i1 Pro.

The problem with LED based sets and filter based units will be @ what wavelengths the spikes are @ compared to the filters – and thus what they miss (as they will have much WORSE than 10nm resolution overall over the ENTIRE 400nm Visible Wavelength).

Uploaded with ImageShack.us

[Anonymous]

Hi everyone,

I’m doing a Samsung 46B8000XF LED LCD next week.

Which meter should I use?
2009 i1 Pro or
2010 Chroma 5 Enhanced

Lately I’ve been using Calman profiles with the i1 as a reference and the C5 as a target.

Any reason to not use this profile approach with a LED LCD?

Thanks!

[Author]

Replies