Ahh, thats def a different monitor, a fellow in another forum made the same mistake. The monitor discussed here is the PS576Ws with a totally different model #. I'll try to find that thread again to post the actual model number here...unless Inkog wants to share it with us (?) 🙂18wheeler said:
They are different BRANDs. But I am almost certain they were made by the same manufacturer. if you have been in Staples stores and actually looked at the Proview, you would find that they look exactly the same. Did you remember CMV 1512? CircuitCity had it as LiquidVideo, European customers had it as yet another brand. But they were the same every bits execpt the brand/model name on the case.
sjetski71 said:
TaskMaster said:
"Our largest fresnel lens size is 15.5"x15.5" with a little bit of lens cut from each corner for durability reasons. "
With this, I'm thinking I should just go with the 17" 16:9 and cut it down.
I agree with you on the 135mm Long-Throw Projection Triplet, I've had my eye on that for a while. I'm just waiting to make sure it will work well with the fresnel lenses I find.
Some more info on the monitor:
OSD selectable fullscreen / normal setting! This means it will natively keep the correct aspect ratio of your selected resolution and center it on the screen. I think this is great! 😀 Supports:
640x480
720x400
800x600
1024x768
1280x768
1280x800
Pixel Pitch: 0.259mm
Display Area: 332*208mm
Nowhere does it state the response time.
" "Our largest fresnel lens size is 15.5"x15.5" with a little bit of lens cut from each corner for durability reasons. "
With this, I'm thinking I should just go with the 17" 16:9 and cut it down. " - ME
Sorry, I just noticed that that is 17" diag.
I'll be able to cut down the 15.5" so the cut corners will not be an issue. So, those fresnels should work nicely with this LCD. Can anyone vouch for thier quality and DIYProjectorCompany's in general?
I've been watching 720p content all day on this ProView and I'm very impressed. I can't wait to get my optics and start experimenting 😀
With this, I'm thinking I should just go with the 17" 16:9 and cut it down. " - ME
Sorry, I just noticed that that is 17" diag.
I'll be able to cut down the 15.5" so the cut corners will not be an issue. So, those fresnels should work nicely with this LCD. Can anyone vouch for thier quality and DIYProjectorCompany's in general?
I've been watching 720p content all day on this ProView and I'm very impressed. I can't wait to get my optics and start experimenting 😀
Proview LCD screen artifact
I have a projector that uses a 15" XGA Proview LCD, and I see a similar viewing angle artifact with a totally black screen. There is a darker area in the top half of the image and a bit lighter area making up the entire bottom third. It is only noticable when you have an image that is very very dark, like a computer-generated test pattern. Real images from TV, DVDs, etc. all look fine. Even very dark scenes from movies look fine.
I have not tried using split fresnels. That might even it out, but it does not affect normal viewing at all.
This LCD has a much better image in the projector than it had with the original backlight. It was very difficult to find a good viewing angle when I tried to use it as a computer monitor. Different areas of the sceen would be brighter or dimmer. Moving away from it was the solution, since that gives a more uniform viewing angle. I am using a long throw lens and one of LumenLab's "790 mm" field fresnels, so that is equivalent to viewing the LCD from some distance. Looks great on the screen.
I have a projector that uses a 15" XGA Proview LCD, and I see a similar viewing angle artifact with a totally black screen. There is a darker area in the top half of the image and a bit lighter area making up the entire bottom third. It is only noticable when you have an image that is very very dark, like a computer-generated test pattern. Real images from TV, DVDs, etc. all look fine. Even very dark scenes from movies look fine.
I have not tried using split fresnels. That might even it out, but it does not affect normal viewing at all.
This LCD has a much better image in the projector than it had with the original backlight. It was very difficult to find a good viewing angle when I tried to use it as a computer monitor. Different areas of the sceen would be brighter or dimmer. Moving away from it was the solution, since that gives a more uniform viewing angle. I am using a long throw lens and one of LumenLab's "790 mm" field fresnels, so that is equivalent to viewing the LCD from some distance. Looks great on the screen.
Inkog...there is a company called www.vdigi.com that sells an adapter that takes a HDTV component signal and converts it to VGA. This would mean that if you hook it up to a DVD player that ouputs 720p, it would send 1280x720 lines to your monitor. I was wondering that since this monitor seems to automatically adjust and center aspect ratios that are not native that it may center the 720 lines over the 800. That is cut off 40 lines from top and bottom.
If this ends up being the case, we could have the very first honest to goodness HDTV LCD DIYpojector ever built! I wanna know!
If this ends up being the case, we could have the very first honest to goodness HDTV LCD DIYpojector ever built! I wanna know!
Unfortunatly the LCD does not support 1280x720, it just displays "Mode not Supported". I have a ATI HDTV Tuner That I'm using to display HD content and it looks awsome. The DTV tuner software allows me to configure the aspect ratio and does a very good job displaying nice black bars. I would be nice if you could make a standalone projector with this LCD, but I have always planned on using it with a HTPC, so I'm happy.
I just got back from Home Depot with my new Dremel 400 XPR
You damn DIYs have created another monster
I'll post some pics of the monitor shortly
I just got back from Home Depot with my new Dremel 400 XPR
You damn DIYs have created another monster I'll post some pics of the monitor shortly
Unfortunately, mine has diagonal lines all through the screen. Very subtle, but they are there, at any resolution. It is particularly bad when there is movement in the picture. I'm not sure if the scaling ship is defective on my example, or if this is a flaw in all of these units. The artifact is not too bad if one stands back a few feet from this small screen, but blown up to 80-100" or so, it will look really bad. It is not a native resolution issue, as I have it perfectly dialed in with powerstrip at 1280x800p and the image is extremely sharp.
I successfully stripped the LCD; it was not hard once I realized that the front bezel slides up slightly to then pull it off, rather than prying.
I successfully stripped the LCD; it was not hard once I realized that the front bezel slides up slightly to then pull it off, rather than prying.
It is possible I have a ground loop, or that it is just a bad unit. Yes, I can certainly put it back together good-as-new.
If any of you guys see the problem in yours (diagonal lines in movement especially - but it is always there) let me know. Watch some DVD's up close and it should be pretty obvious if you have the issue.
Nice stripping guide - I did mine just before you posted that.
If any of you guys see the problem in yours (diagonal lines in movement especially - but it is always there) let me know. Watch some DVD's up close and it should be pretty obvious if you have the issue.
Nice stripping guide - I did mine just before you posted that.
Update: I don't think it is a ground loop, as I plugged it into every outlet I have, including two different monster cable power conditioners and a quality UPS. I also tried two different known-good computer systems with totally different video cards. All of my other LCD monitors do not have this issue. I suppose I could try to exchange this one. Note that the monitor exhibited the diagonal lines before my careful stripping job as well, and the box was not damaged or anything. This is a shame, as I really like the unit otherwise. 
Even if every unit has this issue, it may be watch able for some. But, nearly half of the pixels - on mine at least - are being used for the interlaced diagonal lines during most movements in movies/games, etc.
Even if every unit has this issue, it may be watch able for some. But, nearly half of the pixels - on mine at least - are being used for the interlaced diagonal lines during most movements in movies/games, etc.
An old thread about a different LCD with this same issue: http://www.diyaudio.com/forums/showthread.php?s=&threadid=12608
Cheap chips? Bad Bios? Bad grounding layout? Who knows.
Cheap chips? Bad Bios? Bad grounding layout? Who knows.
If the lines appeared after taking apart, did you ground the LCD PCB? I notice there are two metal tabs connecting the PCD and the metal case.
The artifact was definitely also present before doing anything to the unit. I only stripped it to see if there were light spreader sheets inside with a ridge pattern on them. They were smooth.
Exchange here I come.... hope a local store has one. 🙂
Exchange here I come.... hope a local store has one. 🙂
Just to prove I'm not going nuts, here are two high-resolution .jpg photos (800k each) from T2 (ANY movie or game/even the desktop - faintly - shows the problem). I think you all would agree this would be totally unacceptable on the big screen. I've tried two systems that are PERFECT with several other LCD's so it is definitely the monitor. I'll exchange it if I can. 🙂
Proof ONE
Proof TWO
Proof ONE
Proof TWO
Staples has a 14 day return policy. I asked when I purchased mine 😉 . I doupt they will give you any greef. Good luck!
I got a replacement. It has no dead pixels, whereas the previous unit had one.... the artifact from my screenshots above is still present, but I think it is a little bit better - less evident on most screens. It is still evident a bit in areas where it was the worst before. This seems to be a luck of the draw issue. I would bet it is the flicker controls in the factory menu. Each assembly technician probably sets the values differently. Unfortunately, this menu is not accessible outside of the factory.
Ben_Tech said:
I should clarify that they are *photos* not screenshots.... obviously screenshots would not show the issue as the output from the computer is perfect.
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