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A graphical "bug" in the forum

A graphical "bug" in the forum

Postby fbjon » Sun Jan 21, 2007 11:12 pm

Well, uh.. not exactly a bug but...

I recently got an Acer AL1751 TFT for a secondary screen. I tend to browse on it, since it's sharper than my CRT. The really weird thing is, the background in the sdcompo forums flicker! I.e. the fine-striped one behind the messages. After some investigation I found out that this only occurs with striped patterns one pixel wide (in any direction, horizontal or vertical), and only with a pure blue color. The color difference between the stripes must also be small and low-contrast, and mostly withing a specific range (not too bright or dark).

It just so happens that the background on sdcompo.com is exactly within these parameters. If you can imagine looking at a CRT with 70Hz refresh rate, with a medium bright background, that's what it looks like.

So, a feature request: can we get a new sdcompo.com-theme, in a different color? :? It can be exactly the same look, just as long as the stripes are a (slightly) different color. I'm thinking rusty red, perhaps?
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Postby organic io » Mon Jan 22, 2007 12:12 am

interesting

CRT's will never die :D
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Postby aged » Wed Jan 24, 2007 1:53 am

have you tried changing the screen refresh rate? i've noticed huge
differences between 60Hz and 75Hz :)

(and didn't i warn you about the acer displays? ;))
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Postby organic io » Wed Jan 24, 2007 8:53 am

i think LCD's don't even have a refresh rate. if you change it in the settings, it doesn't do anything
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Postby fbjon » Wed Jan 24, 2007 3:07 pm

dj io wrote:i think LCD's don't even have a refresh rate. if you change it in the settings, it doesn't do anything


TFTs/LCDs do have a refresh rate, i.e. the rate at which the screen is updated. This is the vertical refresh rate, distinct from the horizontal refresh rate, or pixel-rate. Though it's usually fixed at 70 or 75Hz or so, or at least low compared to CRTs since TFTs don't have the flickering CRT effect. Anyway, this flashin o' mine isn't related to that, but probably to some issue with the panel technology, cheap wiring in the panel perhaps.
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Postby aged » Fri Jan 26, 2007 1:31 am

dj io wrote:i think LCD's don't even have a refresh rate. if you change it in the settings, it doesn't do anything


I first thought like that too, but i got rid of some major flickering problems
just by adjusting the refresh rate (acer 17" lcd)... Now i'm using a laptop with (display locked at 60Hz refresh rate) and haven't got any problems so far (viewing angles suck)... ;)
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Postby crosfire » Fri Jan 26, 2007 4:30 am

I have acer laptop display, and now i am curently on 1024x768 with 60hz, and didn't noticed anny "bug".
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Postby organic io » Fri Jan 26, 2007 7:27 am

i love my 21" viewsonic CRT that i got for $65.

like i said ....

even though it weighs like 60 pounds...
CRT'S FOREVER!!!!! THEY ARE CHEAP AND STILL ROCK THE HIAZZAUS
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Postby fbjon » Sat Jan 27, 2007 4:33 pm

dj io wrote:i love my 21" viewsonic CRT that i got for $65.

like i said ....

even though it weighs like 60 pounds...
CRT'S FOREVER!!!!! THEY ARE CHEAP AND STILL ROCK THE HIAZZAUS


Aye, my own CRT won't leave my desk until good TFTs with proper color representation hit the 400€ mark or so. Need it for my photo editing. And watching movies. :)
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Postby RobWilliamsJnr » Mon Jan 29, 2007 7:26 pm

you could always go to the 'Profile' page, and set the board style to be 'sub silver' . . .
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Postby Sonicade » Mon Jan 29, 2007 8:27 pm

Ahh forgot about that, great recommend Rob! :D
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Postby fbjon » Thu Feb 01, 2007 6:03 am

RobWilliamsJnr wrote:you could always go to the 'Profile' page, and set the board style to be 'sub silver' . . .

Ah, good point! Though.. I actually prefer looking at a bit of flickering blue rather than YAFUSS (Yet Another Forum Using Sub-Silver)... heh.
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Postby fbjon » Sat May 07, 2011 7:23 pm

Just to tie up the original posting:

Much later I found out the likely reason for the flickering: it seems the TN-panel can't display true 24-bit color, but approximates some particular colors by quickly switching between the nearby shades. The solution is to buy good hardware in the first place. :)
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