Originally Posted by NewOldVinyl
I'm assuming you have a V10? Do you only watch Blu-ray, or do you also view HD TV shows?
Anyway I encourage every V10 owner to try this on your set and see what happens:
Turn the Contrast down very low, like say 30. Freeze on a bright image, like some kind of animated content or a beach scene or something having lots of bright content and little or no dark areas. Must be a fullscreen image too, not letterboxed or pillarboxed. Now start raising the Contrast level and see if there's a threshold where the screen suddenly gets darker instead of brighter. For example you might step from 75 to 76 and the screen gets darker. It appears that once you find that threshold, you've found the brightest overall level the TV will allow, regardless of the actual Contrast setting.
Now imagine the TV dynamically adjusting the image intensity based on what's happening on the screen.
Someone mentioned that the default Contrast setting of 100 in THX mode is ridiculous since any Contrast setting above 70 does not measurably impact the picture at all. Which begs the question for me, Why is the default Contrast setting maxed out at 100?
Also I've seen this problem on other Panasonic plasmas and Samsung plasmas on display at Best Buy. You might have to watch for it for a long time but eventually it happens on at least some other plasmas.
Yes I'm angry about this problem and I take every opportunity to mention it on the forum, in hopes that *someone* will post a fix for it like how to disable ABL in the service menus. I know I should contact Panasonic but I'm 98% sure they will say there is no problem.
Originally Posted by Camster
I am experiencing something very similar on my 50G10 so I voted as I had a problem. What happens for me is on certain scenes say a bright face for example or walled backdrops maybe too, I'll see a brightness shift or flicker say on that bright face. I find it quite distracting & turning off CATS doesn't stop it though it may lessen it some.
I posted about it here too in the big G10 thread. It's funny though as sometimes it happens alot & others not so much so to get it looked at by a tech would be tricky I believe in order to get it to occur.
I too believe the set is limiting overall brightness or contrast & throttling the image in my case in that section of the screen. I can offer no fix of course but I thought it would help to know you are not alone in this.
ABL can't be turned off. If you could, your tv would burst to flames when showing white screen.
42 incher draws 440watts on white screen, so it has at least 500w power supply. Without ABL, power consumption could be very much higher, maybe 800watts on white screen. That would need 1Kw power supply. I can only imagine how hot 65 incher would get without ABL.
I'm nowhere expert, but I try to explain ABL like it was explained to me:
Imagine a white screen, consuming 440watts. Then black object appears on screen. Power consumption drops. ABL detects it is dropping, so it adjusts the picture more bright. So the black stays black but white background gets brighter but power consumption stays the same.
So when contrast is set high on plasmas, stars of night sky are many times brighter than for example picture of arctic on bright sunlight.
On european models, cinema-mode have standard contrast setting of 36 (out of 60). But anything over 36 there's no increase in brightness. Even when theres a black screen with one tiny white dot. Zero. But on completely white screen, the screen is still as bright as in Normal or Dynamic mode. Good news is there's no "floating whites" like other picture-modes when contrast is set (too) high. It must have been easier to panasonic just use same 0-60 scale than in other picture modes than just modify the scale to 0-36 just for cinema-mode (or 0-70 in THX on US models).
I think THX-mode in US is just like Cinema-mode in EU. Both are preventing floating whites. I'm not sure but I think THX mode in US is little bit odd, because I've heard it is dimmer than cinema-mode in EU. Should consume less power, but is not as suitable for daylight viewing.
...sorry my english.