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View Full Version : Calibration question: brightness


durl
10-14-2004, 02:50 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.

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.

durl
10-14-2004, 05:05 PM
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.

           


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