300 vs 100 for peak-a-boo? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 23 Old 03-09-2004, 03:40 PM - Thread Starter
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Assuming you've adjusted as best as you can in terms of flicker and/or dot clock:

1) How bad is the peak-a-boo on your 300 and how often does it bother you? Is it driving you crazy?

2) Does a slight defocus get rid of it or minimize it further?

Compare it to the 100 if you upgraded or have seen the 100/200 in action. I see it on my 100 sometimes. If its worse on the 300 I can't imagine being very happy. I sit 1.75x away from an 80" wide (92" diagonal 16:9) screen.

I'm watching and following the threads about the Panny 500's. The 500 is a bit pricy as it is, and so I was thinking about grabbing a 300. I've been waiting on the 500, but its a gamble. I don't want to grab a 300 to replace my 100 and find the peak-a-boo is worse than I have now and ruins the overall upgrade. Comments about how the 500's peak-a-boo compares to both the 300 and 100 are welcome also.

thanx for any info

:)
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post #2 of 23 Old 03-09-2004, 07:07 PM - Thread Starter
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This is the deciding factor between taking a chance with a 500 or grabbing a 300 while they last. I need feedback on how bad the peak-a-boo really is for most 300 owners.
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post #3 of 23 Old 03-09-2004, 07:13 PM
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I can't make the comparison for you, but I tweaked the flicker, and have my 300 running from an HTPC... can't say the peek-a-boo scanlines are eveident now... I'm more focused on getting the best scaling from the PC.
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post #4 of 23 Old 03-09-2004, 09:32 PM
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I remember seeing the 300 on a huge screen, and at 1.45X the scanlines were annoying, but they disappeared completely at 1.85X. On Blackout cloth, 113 inch diag. Hope this helps.

BTW, if you sit too cloe, they will be more annoying than on the ae100, since well...the screendoor hides them on the AE100




:)


They really jump out at you on the smooth ae300.

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post #5 of 23 Old 03-10-2004, 08:43 AM - Thread Starter
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Ok, I get it now. I was wondering. Its like a catch 22. The peak-a-boo is more visible because it contrasts highly with the smooth screen "smoothness" of the 300's picture.

I imagine that even though the 500 is in fact, even smoother than the 300, meaning, less screendoor and pixels, the scanlines are in effect, much smaller than on the 300. Comparing the vertical resolution, the 300 has only 12.5% higher resolution than the 100. The 500 has 33% higher resolution than the 300 and 50% higher vertical res than the 100. So as we go higher in resolution, the peak-a-boo scanlines are less visible. At least thats a good thing.

So the main risks are:

300 = peak-a-boo potential problems (vb not likely a major prob)
500 = vertical banding potential problems (peak-a-boo less noticable)

So anyone else have feedback on the 300's peak-a-boo?
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post #6 of 23 Old 03-10-2004, 12:23 PM - Thread Starter
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Understanding this more. Any more feedback?
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post #7 of 23 Old 03-11-2004, 06:22 PM - Thread Starter
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Any more peak-a-boo comparisons?
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post #8 of 23 Old 03-20-2004, 05:58 PM - Thread Starter
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Peak-a-boo comments from 300 owners? How bad is it after tweaking? Still an annoyance or rarely noticable?
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post #9 of 23 Old 03-20-2004, 06:29 PM
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Well I have to say that I had a LOT last night on the movie we watched. But I've just added ffdshow to Zoomplayer, and am still playing. They weren't there like this before, so it may be software related.
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post #10 of 23 Old 03-20-2004, 10:23 PM
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I rarely notice the scanline artifact, and it doesn't bother me. I'm convinced that they're an optical illusion. I have a scene on one DVD which always shows the effect, but it goes away if I put my thumb on the screen and focus on my thumb. I expect they will be less noticeable on the AE500, due to the higher resolution.
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post #11 of 23 Old 03-20-2004, 10:23 PM - Thread Starter
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Some DVD's on my AE100 show lots of it, even though on the 100 its not horrible, but its annoying. Other DVD's I don't see it at all. Annoying.
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post #12 of 23 Old 03-21-2004, 07:23 AM
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Rarely noticeable on my 300...like gazzza I am running from a HTPC.

JVC HD 250
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post #13 of 23 Old 03-21-2004, 07:55 AM - Thread Starter
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I agree. Its an optical iilusion of sorts. I see them more under certain circumstances, but I can't explain it. Sometimes when I don't focus really well (my eyes) or when my eyes wander. Again, some dvd's it happens lots, others, rarely visible or absent.
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post #14 of 23 Old 04-28-2004, 12:10 AM
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Hi gazzagazza and scotty144,

I'm interested in a HTPC for my 300 in hopes of eliminating peek-a-boo or scanlines. Is it possible to share your hardware and software specs/tweaks? I'm lost and without a clue how to start building a good HTPC.

Thanks in advance

Clatto! Verata! Nnyaarrghahum(coughcough)!!
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post #15 of 23 Old 04-28-2004, 01:29 AM
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What is peek-a-boo? I haven't read about this before? Is it the same as screen door effect? I'm also considering the Panny 300.
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post #16 of 23 Old 04-28-2004, 02:00 AM
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i was wondering what scanlines are also. I notice on my projector that when objects move a lot of the time I notice what looks like horizontal lines appear. I notice it a lot in moving faces. Are these scanlines? How do u fix them?
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post #17 of 23 Old 04-28-2004, 03:59 AM
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wixy, is your projector a panny 300?

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post #18 of 23 Old 04-28-2004, 05:54 AM
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no a hitachi home-1 but i was just wondering if they are scanlines
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post #19 of 23 Old 04-28-2004, 07:39 AM - Thread Starter
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If your setup is such that you do not see screendoor, either from sitting far enough away or through the use of some defocussing, or both, you may still see "peak-a-boo scanlines". Every so often, when objects on screen move vertically, or diagonally, as long as there is a significant portion of vertical motion, sometimes the motion brings out what looks like horizontal "scanlines". The appearance is brief. It has to do with the way the LCD projectors power the LCD panels. To reduce this affect on your projector, you wait until the unit warms up and then, for example, on the Panasonic 200, 300 and 500, you do the flicker tweak. Mainly you try to reduce or eliminate flicker on the green panel. Do all the panels (red, green and blue). A side affect of this is often the reduction of the vertical banding that some projector owners see.
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post #20 of 23 Old 04-28-2004, 05:27 PM
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does that require going into the service menu?
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post #21 of 23 Old 04-28-2004, 06:19 PM - Thread Starter
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Yes. Its easy on the L200 and probably the same for the 300 and 500.
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post #22 of 23 Old 04-28-2004, 06:56 PM
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My observation so far is that, scanlines are always there. It's just that movie motion will tend to bring them out more.

For example, when going to the flicker setting screen, you can see black horizontal lines from top to bottom. Scanlines during movies is basically the same thing except they are white.

I noticed them more whenever there are face closeups. Examples of DVDs are Toy Story2 (closeups of Woody or Buzz) and Fifth Element (closeups of Leeloo).

From searches throughout the forums, there doesn't seem to be any solution to this except getting a DLP or CRT projector. Or sitting further away from the screen or reducing the picture size. Or defocusing... which doesn't help me anyway.

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post #23 of 23 Old 05-01-2004, 05:08 PM
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Further comment...

I have been tweaking the calibration of my HTPC and L300 and re-did the flicker adjustment a couple of nights ago after the pj had been on for an hour and a half. (The green screen needed one click more than I had).

Last night watching a movie there was a lot of peek-a-boo initially, but after an hour or so it all but went away. It seems the effect and calibration may be time (temperature?) dependant.

Anyone else noticed this?
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