View Full Version : Calibration question: brightness
Long story short: I've just noticed some burn-in issues with my RPTV. When I have a bright, solid background on-screen, I can barely notice a couple of words from my satellite programming guide in the bottom left-hand corner. Although I have to be 6 inches away to make them out it's still frustrating. I re-calibrated my set to turn down Contrast and Brightness to just under 50%.
Now my question: I read that Brightness doesn't play a role in burn-in, only Contrast (Picture) does. It seems a bit odd to me but is it true? I really need to turn up Brightness to be able to see detail like hair and clothing but I'm afraid to turn it up much past 50%. Thanks.
kevinw
10-14-2004, 03:50 PM
Long story short: I've just noticed some burn-in issues with my RPTV. When I have a bright, solid background on-screen, I can barely notice a couple of words from my satellite programming guide in the bottom left-hand corner. Although I have to be 6 inches away to make them out it's still frustrating. I re-calibrated my set to turn down Contrast and Brightness to just under 50%.
Now my question: I read that Brightness doesn't play a role in burn-in, only Contrast (Picture) does. It seems a bit odd to me but is it true? I really need to turn up Brightness to be able to see detail like hair and clothing but I'm afraid to turn it up much past 50%. Thanks.
Durl, as long as you have been coming here, you now take us seriously about contrast and brightness settings???
What Tv do you own? Generally if most settings are under 50% all will be good. BUT how long has the guide been left on? You can not really fix the problem but at least you caught it before it got worse.
I didn't believe that I had the settings too high. I used a Video Essentials disc to calibrate my set and did my best to put the settings up only as high as they needed to be. I didn't have Contrast boosted up to 75% or anything. Actually, I thought that I was having to set it too high in order to adhere to the Contrast test. I have a Sony KP53-HS30. I'm guessing that it doesn't show "true black" well enough to do the Contrast test accurately.
The guide, to my knowledge, has never been on more than a minute or so at a time. Unless my wife is turning on the guide and leaving the house for 15 minutes (which I doubt seriously since she knows about burn-in) I can't imagine why it would burn in.
So is Brightness less of a factor than Contrast when it comes to burn-in? When I have brightness under 50%, parts of the picture are basically blacked-out so we can't see detail. In one part, a man was outside in daylight, wearing a long-sleeve jacket. We couldn't tell where his arm was against his chest because it was all one huge black chunk. This is a HD picture we're talking about...so I have a bit of frustration when I can't see images at all.
kevinw
10-14-2004, 05:49 PM
You might need someone to come in and adjust the gray scale in service mode to get better blacks and more defintion in low light scenes.