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The Amiga Forum · Hardware

Interlace Flicker

15 messages in this thread

#116529From: Barry MassoniMar 30, 1988 1:09 PM

Is there any way to reduce or elminate interlace flicker without buying a long persistance monitor, setting all the colors to neutral grey (almost) or turning the contrast down so that everything is a neutral grey?

#116615From: Richard Rae/SYSOPMar 30, 1988 10:21 PM

Go to a light background and dark foreground and see if that helps. Reduce the level of ambient light in the room. Install a contrast enhancement filter. All of the above. 8)

#116771From: Barry MassoniMar 31, 1988 8:32 AM

Thats pretty much the setup I have now. Can you tell me what a contrast enhancement filter is? Is it hardware? Soemthing that goes over the screen? barry

#117041From: Richard Rae/SYSOPApr 1, 1988 7:02 PM

Barry, just the typical "anti-glare" screen you put over the CRT. It cuts the level of the ambient light by twice as much as the screen illumination (unless you use a circularly polarized one, in which case it's probably more like an order of magnitude). This allows you to reduce the level of CRT light which reaches your eyes, which in turn reduces the flicker. At least that's my theory; to be honest I've not had the effect explained to my satisfaction… but it does seem to help. Rick

#116629From: Vic WagnerMar 30, 1988 10:24 PM

Barry, I have my workbench colors set to 950, bab, 000, and f50. I use interlace ALL of the time and don't notice the flicker at all. The lights in the room are not up to full brightness, but it works fine for me. Hope this helps you.

#116773From: Barry MassoniMar 31, 1988 8:36 AM

Vic, You lost me. How do you set the screen to the denominations you suggested? I've been using the slider gadgets on the "preferences" screen. They seem much to sensitive with a very small movemment going from very dark and hardly readable to very bright with lotso flicker. Is there a saner way? Barry

#116812From: Vic WagnerMar 31, 1988 3:18 PM

Barry, The way I found out what the values are: Clicking outside the little spot in the prop gadgets causes them to move 1 value. I just clicked outside the spot (down toward the dark side……(hmmm that sounde sinister)) 'till the spot showed up, and counted. Re: very sensitive, perhaps you have the contrast control on your monitor turned way up. That will make the preferences gadgets seem squirrelly (sp). What kind of monitor do you have?

#116972From: Barry MassoniApr 1, 1988 2:26 AM

It's an Amiga 1080 monitor. Contrast is centered. I now have some colors that are useable in low light conditions in interlace. It would be nice to have it useable in any lighting conditions but it looks like I'll have to wait till I can afford a better monitor. Barry

#116665From: Don Curtis/SYSOPMar 30, 1988 11:49 PM

Wear a pair of polarizing sunglasses (seriously!) or get one of the commercial polarizing filters for the screen.

#116774From: Barry MassoniMar 31, 1988 8:39 AM

OK, Don, we'll do that reeaall soooon now. Polarizing sunglasses and a polarizer for the screen. Let me guess, when the flicker gets to much you just turn your head and it ALL goes away. How long has it been since your last vacation? Thanks, Barry

#116830From: Don Curtis/SYSOPMar 31, 1988 3:39 PM

Barry, I'm not kidding….the polarization reduces the contrast between adjacent colors…thus reducing flicker. I was serious about that. Don

#116974From: Barry MassoniApr 1, 1988 2:27 AM

I knew you were serious, Don, just havin' a little fun 8). Thanks.

#116784From: peter selverstoneMar 31, 1988 10:37 AM

There is a hardware solution to the flicker for 2000's. Microway's Flickerfixer is a board which plugs into the video slot and drives multiscan type or VGA monitors. It eliminates the visible scan lines in 200 line modes and deinterlaces 400 line modes. I supports all display modes including HAM. Output quality is similar to VGA.

#116971From: Barry MassoniApr 1, 1988 2:21 AM

Thanks, Peter.

#116986From: Khalid AldoseriApr 1, 1988 7:59 AM

I didn't know about this, Peter. Do you have Microway's phone number or address? I am VERY interested in such a product. (I already have an unused multiscan monitor lying around.) Khalid.