san@cositex.UUCP (Steve Sanderson) (05/10/86)
Boy... have I got one for y'all.
The other day I was playing with my Amiga while using the workbench
etc. in Interlace and (once again) playing with the monitor knobs to
reduce the flicker. For some reason, I squinted while looking at a
flickering screen, and noticd the flicker appeared to go away! Taking
a guess, I put on my (cheap polarized Foster Grant (TM?)) sunglasses
and the flicker went away! Now, I did feel a little strange staring at
the monitor, inside my house with my ``shades'' on, but hey... my eyes
liked it!
Getting serious for a moment, I understand the when squinting you
partially polarize light, and of course the same happened with my
sunglasses. Is it possible that polarization somehow reduces the
apparent flicker? Have I just given away a simple product idea to an
adventerous type (or two)? Presumably, (if anything I've been saying
is true) you could have a piece of polarized film (or other polarized
transparent material) and place this over the monitor. How this would
affect the overall display quality is another ballgame altogether.
Not having done extensive test, I am just assuming that it is polariztion
that causes this, though it may not be as simple as that. Either way,
if you want to use interlace w/out flicker, and don't mind wearing
sunglasses indoors, rush out to your local store and get a pair.
Steve
P.S. If someone does comeout w/an attachment for the monitors, I'd love
to hear about it. Since I'm all software, I'd never get around to doing
it anyway!
--
Steve Sanderson, COSI Texas
4412 Spicewood Springs, Suite 801 Austin, Texas 78759
UUCP: {ihnp4, seismo, ctvax}!ut-sally!cositex!san, san@cositex.UUCP
AT&T: (512) 345-2780bobp@amiga.UUCP (Robert S. Pariseau) (05/13/86)
It's not the squinting or the polarization that does it per se. It's the reduction in overall brightness. Your ability to perceive flicker goes down as the overall brightness (display plus background room light) goes down. This is one reason why you find a lot of CAD machines in dark rooms. You'd probably get the same improvement with un-polarized sunglasses. Flicker perception also decreases as image contrast decreases. This is kind of hard to quantify in a color image, but it is basically why fiddling around with the colors helps alot.
flocchini@ucdavis.UUCP (flocchini) (05/14/86)
> Boy... have I got one for y'all. > > The other day I was playing with my Amiga while using the workbench > etc. in Interlace and (once again) playing with the monitor knobs to > reduce the flicker. For some reason, I squinted while looking at a > flickering screen, and noticd the flicker appeared to go away! Taking > a guess, I put on my (cheap polarized Foster Grant (TM?)) sunglasses > and the flicker went away! Now, I did feel a little strange staring at > the monitor, inside my house with my ``shades'' on, but hey... my eyes > liked it! > > Getting serious for a moment, I understand the when squinting you > partially polarize light, and of course the same happened with my > sunglasses. Is it possible that polarization somehow reduces the > apparent flicker? Have I just given away a simple product idea to an > adventerous type (or two)? Presumably, (if anything I've been saying > is true) you could have a piece of polarized film (or other polarized > transparent material) and place this over the monitor. How this would > affect the overall display quality is another ballgame altogether. > > Not having done extensive test, I am just assuming that it is polariztion > that causes this, though it may not be as simple as that. Either way, > if you want to use interlace w/out flicker, and don't mind wearing > sunglasses indoors, rush out to your local store and get a pair. > > Steve > > P.S. If someone does comeout w/an attachment for the monitors, I'd love > to hear about it. Since I'm all software, I'd never get around to doing > it anyway! > -- > Steve Sanderson, COSI Texas > 4412 Spicewood Springs, Suite 801 Austin, Texas 78759 > UUCP: {ihnp4, seismo, ctvax}!ut-sally!cositex!san, san@cositex.UUCP > AT&T: (512) 345-2780 *** REPLACE THIS LINE WITH YOUR MESSAGE *** i tried the above with my trusty ski optics and the jayminerslides on fish disk #19. the flicker is all but gone. i dont think it is just reduction of intensity.i have lowered the brightness level without this kind of sucess. there is a product that may help. i have seen ads for "Polaroid CRT Aids". this a two layer system with a linear polarizer and a quater wave plate. if i can get a hold of one of these i'll put my impressions on the net. i will admit i was surprised at the results.with the sunglasses all thoughts of a long persistence monitor have dissappeared. bob flocchini lawr university of california davis,ca 95616 ucdavis!deneb!flocchini . :wq