Originally Posted by Scott_Arm
Right now my R/G/B offset/bias values are: 26/25/11
What prompted you to reduce the Blue Bias to 11? It looks like blue is totally clipped.
For 10 point white balance, I have 10% set to 0/0/0. I had +4 blue at one point, but then all of the dark areas of the screen appeared to be glowing blue, even though the RGB levels were showing as balanced.
If the Blue deficiency is caused by the low Bias setting but you use 10% to "compensate", it will indeed cause Blue to over shoot below 10% (you can confirm by extending the near black grey scale to 10, or even 20 points).
That's why I started to think the 10% measurement wasn't valid. If those near black measurements are actually correct, then do I start by changing my bias setting or the 10 pt? I guess it becomes trial and error, and see which one gets the near black values to start responding.
I would put the Blue bias back to 25, run the Near Black Grey Scale, and adjust the Bias and 10% controls according to the shape of the blue curve in that range.
Unfortunately my tv doesn't have 20 pt controls.
Even if you don't have 20-pt control, it's still useful to set HCFR to run 20 points, so that you know what the TV is doing in those in-between points.
The same applies to the Near Black region - you don't have direct control over the individual points, but the measurement results allow you to determine the best settings for the Bias and 10% controls.
As a "rule", I don't normally make drastic adjustments to the Bias controls, for two reasons:
- At 0% the LCD panels are attempting to block all the light from coming through, but they may have inherent limitations that result in unequal residual R/G/B components cannot be "adjusted out"
- The meter may not have sufficient accuracy for the individual R/G/B readings at 0%.