Common Plasma Terms and Acronyms - Page 2 - AVS Forum
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post #31 of 37 Old 02-13-2012, 04:34 PM
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Originally Posted by Taz11 View Post

Automatic Brightness limiter.

I would actually like to know more about Plasma's natural brightness fluctuations, is it to do with power draw? Like if theres loads of black on screen and a little white it will be brighter than an all white screen with little black. Seems to be a natural issue with Plasma's.
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post #32 of 37 Old 03-01-2012, 09:23 AM
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post #33 of 37 Old 03-13-2012, 04:28 PM
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What is 'Fbr'?
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post #34 of 37 Old 06-04-2012, 11:30 AM
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Originally Posted by weedeater View Post

What is 'Fbr'?

Since I keep reading about FBr problems I, too, would like to know what that means. Anyone?
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post #35 of 37 Old 11-05-2012, 08:58 AM
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Quote:
Originally Posted by F27 View Post


I would actually like to know more about Plasma's natural brightness fluctuations, is it to do with power draw? Like if theres loads of black on screen and a little white it will be brighter than an all white screen with little black. Seems to be a natural issue with Plasma's.
See: http://www.avsforum.com/t/1038221/why-plasma-has-so-high-brightness-specs#post_14058119

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Originally Posted by weedeater View Post

What is 'Fbr'?
Fluctuating Brightness
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Originally Posted by zoyd View Post

First some nomenclature: brightness pop= fluctuating brightness = gamma shifts = floating blacks. These can all look like the same thing and I will use the shorthand "FBr" from now on to denote the effect since this was first noted in 2011 Panasonic displays and given that name, although manifests itself somewhat differently on the two display lines. There are a variety of potential causes of Fbr, gamma shifting in the DSP (digital signal processor dynamic brightness), and how the pixels are initialized and reset are two of them. You can turn off some of the effects in the DSP (the dynamic brightness control) but not the one associated with pixel initialization at the drive level. It is the one at the drive level which generates noticeable FBr of the floating black variety under certain conditions on the D series. Panasonic and Samsung have both issued non-standard upgrades to address their respective problems. The fixes are not implemented in the DSP but in auxiliary board firmware (the logic board in Samsung's case, A-Board for Panasonic) and require upgrading low-level drive firmware.

[...]

FBr occurs in relatively dark scenes (usually when a bright object is introduced) and will appear as a slight increase in brightness at all levels but most noticeable in the darker portions of the image including the black bars in 2.35 letterbox material. That last point is key and the easiest way to tell if you are seeing FBr is to test for it in the black bars with 2.35 material.

[...]

Also too: Hockey flashes are not FBr!
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post #36 of 37 Old 02-19-2013, 04:05 PM
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The literature that I've read commonly states that the two mechanisms in PDP that age the phosphors are:
  • Solarization - High energy UV photons (light) damage the phosphor
  • Ion and electron impact - Charged particles impacting and damaging the phosphor


Modern Plasma displays have higher Xenon content which emits lower energy UV photons and thus less phosphor damage and longer life. Also, newer phosphors can be inherently more resistant to the above mechanisms.
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post #37 of 37 Old 02-19-2013, 04:09 PM
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What would cause this green shading when panel is off and noticeable when viewing ice hockey games. PDP has 24000 hrs 3rd gen 433CMX? Anyone
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