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Forum: Display Calibration   10-20-2014, 03:54 PM
Replies: 49
Views: 560
Posted By johnfull
Thought #1...

Thought #1 (http://www.avsforum.com/forum/usertag.php?do=list&action=hash&hash=1) -- The yellow pixel is advertised as adding to brightness.
The phosphor on the blue LED has a lot of yellow...
Forum: LCD Flat Panel Displays   10-20-2014, 12:58 PM
Replies: 1
Views: 58
Posted By johnfull
YouTube has some good material. Avoid the...

YouTube has some good material.
Avoid the actual 4k material, though, and select 1080p.
Forum: Display Calibration   10-20-2014, 10:02 AM
Replies: 49
Views: 560
Posted By johnfull
Or it could be what the software does with that...

Or it could be what the software does with that data -- if the colorimeter puts out numbers
for the three primaries, what does it put out for yellow? And how is that figured into the
calculation...
Forum: Display Calibration   10-20-2014, 07:36 AM
Replies: 49
Views: 560
Posted By johnfull
"...Any perceived errors that result from using a...

"...Any perceived errors that result from using a colorimeter are a function of how different your vision is from the standard observer and how different the colorimeter filter functions are from the...
Forum: Display Calibration   10-20-2014, 07:12 AM
Replies: 49
Views: 560
Posted By johnfull
Cool The major problems with colorimeters is when...

The major problems with colorimeters is when individuals use them without profiling them against a spectrometer. You use the term "Phobia", I would use the term "Cautious".

As with most...
Forum: Display Calibration   10-20-2014, 06:06 AM
Replies: 49
Views: 560
Posted By johnfull
Not all eyes are created equal and neither are...

Not all eyes are created equal and neither are all colorimeters.
Why would a manufacturer spend the money required for sensitivity
to all frequencies when only red, green, and blue are usually...
Forum: Display Calibration   10-20-2014, 04:30 AM
Replies: 49
Views: 560
Posted By johnfull
Sony had a problem with the narrow spectrum of...

Sony had a problem with the narrow spectrum of its green and red quantum dots.
I used that as an analogy to the problem of yellow in Quattrons.
Colorimeters are not equally sensitive to all...
Forum: Display Calibration   10-20-2014, 04:04 AM
Replies: 49
Views: 560
Posted By johnfull
Another thing that bolsters my theory is the...

Another thing that bolsters my theory is the trouble that some calibrators are having
with extremely narrow sources of spectrum -- like Quantum Dots. Colorimeters may miss
part of the output by...
Forum: Display Calibration   10-20-2014, 03:26 AM
Replies: 49
Views: 560
Posted By johnfull
Colorimeters are set up around Red, Green, and...

Colorimeters are set up around Red, Green, and Blue wavelengths for the sake of economy.
Sensitivity is not Panchromatic, but Orthochromatic in a colorimeter, correct?
If a wavelength of 580...
Forum: LCD Flat Panel Displays   10-20-2014, 03:11 AM
Replies: 260
Views: 18,703
Posted By johnfull
Go to the last page of the Video setup and change...

Go to the last page of the Video setup and change the Light Sensor Minimum to a higher
value till it is not too dark. :)
Forum: Display Calibration   10-20-2014, 02:38 AM
Replies: 49
Views: 560
Posted By johnfull
I won't quibble over language here --...

I won't quibble over language here -- colorimeters don't actually 'care' about anything.
My question is about the range of each of the three receptors in the equipment.
Yellow lies outside of...
Forum: Display Calibration   10-20-2014, 02:32 AM
Replies: 49
Views: 560
Posted By johnfull
This is my question and it is reverse-engineered...

This is my question and it is reverse-engineered from observations
of calibrators using colorimeters. Their calculations of white point
are way off in the direction of yellow. I posit the theory...
Forum: Display Calibration   10-20-2014, 02:00 AM
Replies: 49
Views: 560
Posted By johnfull
The disturbance comes from not adding the...

The disturbance comes from not adding the spectral yellow to
the calculation of white. The calculation will show excesss blue.
Other functions of the yellow are handled by the chroma circuit,...
Forum: Display Calibration   10-20-2014, 01:58 AM
Replies: 49
Views: 560
Posted By johnfull
Metamerism. R+G looks the same as the spectral...

Metamerism. R+G looks the same as the spectral yellow, but
is seen differently with equipment other than our eyes.
A prism will show red and green lines for the first and yellow
for the second....
Forum: Display Calibration   10-19-2014, 06:07 PM
Replies: 49
Views: 560
Posted By johnfull
The white LED backlight generates red, yellow,...

The white LED backlight generates red, yellow, and green wavelengths from its yellow phosphor. A colorimeter set up to see only red and green will not accurately record the yellow spectrum.
Sharp...
Forum: LCD Flat Panel Displays   10-19-2014, 05:56 PM
Replies: 260
Views: 18,703
Posted By johnfull
I don't know why they aren't set up at the...

I don't know why they aren't set up at the factory to look good. It's very strange.
What I do know is that they look much much better when they are calibrated.
Are you going to try the Dynamic...
Forum: Display Calibration   10-19-2014, 04:24 PM
Replies: 49
Views: 560
Posted By johnfull
Quattron utilizes a wavelength range that RGB...

Quattron utilizes a wavelength range that RGB equipment is not
able to properly read or incorporate into formulae.
Several people have tried to calibrate a white point with SpectraCal
and ended up...
Forum: Display Calibration   10-19-2014, 02:53 PM
Replies: 49
Views: 560
Posted By johnfull
A colorimeter may or may not register a...

A colorimeter may or may not register a completely alien wavelength
accurately. The blue is counteracting both G+R and Y to make white. Do you know it the wavelength range of yellow is accurately...
Forum: Display Calibration   10-19-2014, 10:50 AM
Replies: 49
Views: 560
Posted By johnfull
I understand, but there is general hostility to...

I understand, but there is general hostility to Quattron among calibrators because of the
hoops you have to jump through. Adding the yellow wavelength of light, in addition to
the yellow generated...
Forum: Display Calibration   10-19-2014, 10:12 AM
Replies: 49
Views: 560
Posted By johnfull
I'm not an expert, but I have had 2 Quattrons in...

I'm not an expert, but I have had 2 Quattrons in the last 3 years, which I have set up with
the AVS calibration disc and my own perception of white point. The blue LED that supplies
the primary...
Forum: LCD Flat Panel Displays   10-19-2014, 09:44 AM
Replies: 260
Views: 18,703
Posted By johnfull
Try the Dynamic settings that I posted. That...

Try the Dynamic settings that I posted.
That setting is designed to take advantage of the full brightness range.
Let me know if you have questions about the calibration.
I used a disc to get the...
Forum: LCD Flat Panel Displays   10-19-2014, 09:40 AM
Replies: 3,958
Views: 345,557
Posted By johnfull
You're right!:) At least acknowledge owner's...

You're right!:)

At least acknowledge owner's opinions -- the good and the bad.
I've had my criticism of the set, but it affects the entire industry.
The blue LED and the need to make sets ever...
Forum: LCD Flat Panel Displays   10-19-2014, 05:51 AM
Replies: 3,958
Views: 345,557
Posted By johnfull
Bruce, I provided you with a favorable review,...

Bruce, I provided you with a favorable review, but you ignored it and sent CNET's vendetta
against Sharp in response. You can believe what you want, but owners of the Q+ sets seem
pleased with the...
Forum: LCD Flat Panel Displays   10-18-2014, 08:31 AM
Replies: 260
Views: 18,703
Posted By johnfull
Thanks, Rod and Chip! These sets are...

Thanks, Rod and Chip!
These sets are awesome...:)
Forum: LCD Flat Panel Displays   10-18-2014, 08:24 AM
Replies: 3,958
Views: 345,557
Posted By johnfull
http://pocinc.net/blog/product-reviews/review-shar...

http://pocinc.net/blog/product-reviews/review-sharp-80-inch-aquos-q-series-1080p-240hz-3d-smart-tv-lc-80uq17u
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