Originally Posted by gtaylor0
OK I have a 5010, Nov 2007 build. I use a separate player for standard DVD's and use 1080i -- I see flicker on 1080i unless I choose Standard or Advance; in those cases, brightness gets a little dimmer. For BD I use 1080p / 24p and while I don't see flicker, Standard and Advance both dim the panel very slightly. I thought that's the way it was on all Pio's? There was talk of those modes affecting brightness -- ever so slightly -- somewhere in this forum, so this was a bug? And so is that the problem, the change in brightness? It's not normal for a higher refresh rate to change brightness just a little bit?
1080p/24 signals have no problems; when purecinema is set to off or advance, 72hz is locked. PC Advance dims the panel further but no ones know exactly why, as PC off still runs in 72hz when playing 1080p/24.
The 72hz mode is normal to have lower brightness, its part of how the panel works. The bug is that when using 480i or 1080i sources, the film lock doesn´t stay set when using PC advance. It drifts in and out of film mode.
When it loses the lock, the panel reverts to 60hz, as it has a higher brightness setting, you will notice a small flicker when it does. As it acquires film lock again, you will notice it dimming as it is changing to 72hz. It always happens in the same scenes. For example, in sw: the empire strikes back, the first scene, when the probe crashes in the snow, it will brighten, then as the probe starts hovering, it will darken again. I can notice it very quickly when watching a movie in a dark room using pure cinema advance. With the other settings, it doesn't happen.
This glitch is not the same as the panel dimming when changing pure cinema settings. It is something more akin to auto dimming in some lcd panels, so it is more noticeable as the brightness doesn´t stay constant.