Originally Posted by rpauls
I'm not too familiar with LCDs, but doesn't the local dimming only dim when displaying black (or very near black)? or are there numerous dimming levels for the full range of brightness?
I would imagine that the only IRE level you are having trouble with is 0%, where the backlight locally dims to completely off, so just disable local dimming for this one measure, and then turn it back on for 10% and up. It will have no effect at all on you grayscale or overall gamma. The only effect will be on your contrast ratio measurement. But this value is meaningless anyway with the backlight off. It is infinity.
thanks for the reply.
I don't know details of local dimming implementation - so I'll not go there.
No, I don't care about my complete black level gamma and etc, but I do from 10% and up.
I don't know how LD on and off effects gamma and etc
- I think it should as LED back light is dynamic that adjusts based on signal (RGB level) to the zone. I don't have 1 "pixel" to 1 LED, it's more like 300 pixels per 1 LED - don't take that number as fact as I don't know.
My issue is that I don't know how to tell HCFR to start from 10% instead of 0%. I'm not getting any readings at 0% and till 10% and as result HCFR waits for any readings in a loop forever.
Anyhow I can specify HCFR to start from 10% with "View images" generator?
Anyone knows how to calibrate i1D2 to get reliable readings or even 0 for 0% - where 0 is the value and HCFR will proceed Ok.
Somehow when I click "Calibrate" sensor in HCFR it returns right a way no matter to where I put the sensor, while when I click "Calibrate" in iMatch (x-rite soft) it takes several seconds.
I'm not sure that i have properly calibrated sensor in HCFR