Originally Posted by news_watch
Due mostly to the eye seeing it as black relative to the surrounding lighter areas. Try also putting a low level light, like a small (6 inch or less) flouresent behind the TV and the blacks get blacker.
I understand this phenomenom, but why would the boardering letterbox "Black" bars appear blue and the image appear black. If the letter boxing "black bars" cannot achieve true Black, how can the image achieve a blacker "Black"?
I would think the letter box bars would be at IRE 0 and the image would be at IRE 0+ something. If this is true then I wonder if the blue is actually increasing at something like IRE 2 DOWN to 0 and the image "Black" is at maybe IRE 10 where it was balanced to look D65 "black".
If this is the case, then is there a chance to balance out the IRE 0-1 range to be less blue and still achieve a good grey scale? Or is the going to result in a higher Y for IRE 0 which means we can never get to a true Black.
But, here is another observation: using a Greyscale Bars or gradiant pattern, I do not see a bar or area that looks "blueish", but when there is no input, or there is a fade-to-black, the screen looks blue. This too confuses me and makes me think there may be hope to achinving a D65 Black. Maybe this can be done by adjusting the SUB-BRT and RGB Biases in the service menu and closing the IRIS to MIN. I remember a post years ago about "Gonzo Black" by adding an optical black filter. I wonder if this is the only way to go to a true Black.
So I am just opening the discussion to see if anyone has found a way, short of opening the TV to either add a black filter or replace the OB, to get less Blue in Black.