I have a Proxima 810 LCD panel with a Dukane 4000 overhead projector.
I apologize for not listing exact specs, but this is a common beginner setup from what I've read here. It's a 4000 Lumens projector with I think a 640x480 LCD resolution.
I searched the threads but didn't see anyone else having my problem with system.
When I set up the system and tried to watch several different dvds connected to the lcd panel through the svhs connection, I had a couple of problems.
For all problems, this was in a semi-dark room during the day and also at night in a dark room. Projection was onto an offwhite wall.
I am familiar with the potential macrovision problem and I don't think that's what I was seeing.
The AGC didn't appear to be cycling or does macrovision affect dvd differently that it affects vhs?
In one case, a children's dvd, the picture is darker than it should be, in my opinion. Adjusting the contrast didn't seem to help.
This was a children's Kermit the Frog dvd and the colors of the screen were too dark. I could look at the panel on the OHP and see the correct colors, but a yellow color surrounded by green on the LCD screen projected on the wall as almost black surrounded by dark green. Shaded sections of swamp didn't have good detail and neither did the clouds. Again, I could see the detail on the LCD sitting on the OHP, but not when it was projected on the wall.
While watching a dvd of a football game, I wasn't able to adjust the colors to have everything the correct color at the same time. If the uniforms were correct, the grass was "muddy." If the grass was correct, the uniforms were purplish and the skin tone on people was off.
I also tried to watch a dvd of Smallville and had the same problem with muddiness in skin tones and background detail.
Any thoughts?
Am I being too picky for a 4000 lumen projector?
Is my image too big on the wall so I need to make the projected image smaller?
Is 60 inch diagonal the best I should expect?
I don't remember the size I was projecting on the wall, but it was fairly big and could have easily been bigger than 4'x3'.
I apologize for not listing exact specs, but this is a common beginner setup from what I've read here. It's a 4000 Lumens projector with I think a 640x480 LCD resolution.
I searched the threads but didn't see anyone else having my problem with system.
When I set up the system and tried to watch several different dvds connected to the lcd panel through the svhs connection, I had a couple of problems.
For all problems, this was in a semi-dark room during the day and also at night in a dark room. Projection was onto an offwhite wall.
I am familiar with the potential macrovision problem and I don't think that's what I was seeing.
The AGC didn't appear to be cycling or does macrovision affect dvd differently that it affects vhs?
In one case, a children's dvd, the picture is darker than it should be, in my opinion. Adjusting the contrast didn't seem to help.
This was a children's Kermit the Frog dvd and the colors of the screen were too dark. I could look at the panel on the OHP and see the correct colors, but a yellow color surrounded by green on the LCD screen projected on the wall as almost black surrounded by dark green. Shaded sections of swamp didn't have good detail and neither did the clouds. Again, I could see the detail on the LCD sitting on the OHP, but not when it was projected on the wall.
While watching a dvd of a football game, I wasn't able to adjust the colors to have everything the correct color at the same time. If the uniforms were correct, the grass was "muddy." If the grass was correct, the uniforms were purplish and the skin tone on people was off.
I also tried to watch a dvd of Smallville and had the same problem with muddiness in skin tones and background detail.
Any thoughts?
Am I being too picky for a 4000 lumen projector?
Is my image too big on the wall so I need to make the projected image smaller?
Is 60 inch diagonal the best I should expect?
I don't remember the size I was projecting on the wall, but it was fairly big and could have easily been bigger than 4'x3'.
Well I have a few ideas.
I checked and the OHP seems to be bright enough but I didn't check the lamp color temp. I hope this doesn't seem condesending but have you moved the lamps at all? My OHP has an "on the fly" changeover setup and I had to move it back and forth a couple of times to get the lamp to the right spot. It slides side to side and aims and connects the lamp, it had gotten nudged out of alignment a little bit and the light was not being aimed in the right place.
On some of the LCD panels you have to nudge them around a bit to get proper convergence.
The 810 is listed as having 2.1M colors that may not be enough for you.
I have the same problem with getting one color correct but another will be wrong, and that's with a pro projector.
With older TVs you can see a change in how color is displayed when you change channels and sources. Since all pj panels are old this may be a simular problem.
If anything I said seems too stupid, please just laugh and wait for a more knowledgable reply.
I checked and the OHP seems to be bright enough but I didn't check the lamp color temp. I hope this doesn't seem condesending but have you moved the lamps at all? My OHP has an "on the fly" changeover setup and I had to move it back and forth a couple of times to get the lamp to the right spot. It slides side to side and aims and connects the lamp, it had gotten nudged out of alignment a little bit and the light was not being aimed in the right place.
On some of the LCD panels you have to nudge them around a bit to get proper convergence.
The 810 is listed as having 2.1M colors that may not be enough for you.
I have the same problem with getting one color correct but another will be wrong, and that's with a pro projector.
With older TVs you can see a change in how color is displayed when you change channels and sources. Since all pj panels are old this may be a simular problem.
If anything I said seems too stupid, please just laugh and wait for a more knowledgable reply.
I need to make a correction and I may have answered my own question.
The panel is a Proxima 822C and someone posted the stats as having a contrast ratio of 200:1
This is too low for good use with a video projection set up and might explain the extreme darkness in shaded screens.
I'm still not sure about the colors being off unless it's due to the limited colors because this is an old model.
The panel is a Proxima 822C and someone posted the stats as having a contrast ratio of 200:1
This is too low for good use with a video projection set up and might explain the extreme darkness in shaded screens.
I'm still not sure about the colors being off unless it's due to the limited colors because this is an old model.
One other thing you could try is projecting onto a plain white piece of paper, and see what that looks like. If your wall is off-white in the wrong direction like yellow or brown it can look weird. I know people have used slightly silver/grey but any 'real' color may look weird. I had marked improvement when I covered the plain white wall with blackout cloth.
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