| Hezz |
I wonder if this is the new sharp LCD that has the drivers as part of the TFT panel? Check out this link:
http://neasia.nikkeibp.com/nea/200103/peri_124539.html
IF this monitor listed on ebay uses this particular LCD I wonder if the extra circuits on the back of the panel would block more light. I don't know, they claim it is even brighter than oldere LCD panels. It looks really good. |
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| ace3000_1 |
they dont have a sharp lcd in them, they have a hitachi, how do i know? cos i have one lol
Trev |
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| Hezz |
Ace_3000,
Is the resolution of your 7 inch panel really 1024 x 768 or is that just misleading on the ebay site.
Hezz |
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| ace3000_1 |
xga compressed, svga compresed, vga native, its 800x480 native
200:1 contrast and 30ms speed 264k colour well 18 bit i run 32 bit through it, it works ok lol but that obviously is cos of the controller, the controller in these enhances the 18bit colour to 24bit.
Trev |
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| Hezz |
Ace,
I'm interested to see the results of your projector. I like the size and I also like the idea of not using a fresnel between the objective and the LCD. It appears that your set up is like that based on the pictures that I have seen so far. If you are not using a fresnel between the LCD and objective lens do you have reduced light output?
That kit projector from the orient that was on one of the threads had a really outstanding picture and I attribute part of that fact to the fact that it looked like no fresnel in the LCD imaging path.
Hezz |
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| ace3000_1 |
hmmmm 2 frensels in the smaller setups ive noticed no great gain in light output, but what i have noticed with the 2 frensel system is the light is more even , ive fooled with my infocus lp220 and that has 2 frensels, i took one out the see the difference and its not realy any brighter but the light is totally even, in the one im making ive gotten the image full brightness over the whole lcd, i cut a frensel down, it was a hard page magnifier and by doing this it changed the focal length cos of the amount of rings cut off and the angle of the rings remaining as im sure u will understand, i put that frensel in there and no go, no light was collimated just the same symtems as dracul is having with his at the moment, so i took one out of the infocus, its a tad too small but its works great with the 2, if i just use the infocus frensel the light isnt too bad but not much better then the cut down frensel i first used, but with the both togther behind the lcd its perfect over the whole lcd's area, corner to corner ect, so its go me wondering if there is another way with our projectors, if we realy need that second frensel and maybe we could just do a small modd like adding another half of a frensel, ofcourse the only way to find out is to try, ill be getting another page magnifier and ill see what hapends then, ill be getting another one of the same, also im going to try a flexible page mag as they seem to be clearer and work better like the one in my last projector did, rings are no problems just mount it 10mm from the lcd, there are ways hezz to eliminate a frensel, 1 is the obvious of using a standard form factor lens and its typical now days to have them in projectors as the lenses only have to be small because of the small lcd's, weather they work better im not sure but i recon a nice powerful one would yeald more light then a frensel, how well the light would be over the lcd im not sure, do u have the link hezz to the kit u saw?
Trev |
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| Hezz |
Ace,
I didn't save that link but it still might be in an active thread. It would be back a ways and I cannot remember the name of the thread.
It sounds like your using both fresnels back to back but in front of the LCD on your new projector. For some reason I had assumed that you were using just one to collimate the light output. Using two together like in an OHP will actually have the light collapsing down on itself.
I know there is a way to collimate light that works better than a fresnel but it requires a long tapering light pipe with a gradual taper. The longer it is the better it will work.
I made an experiemental one which was only about 14 inches long and it projected an almost perfect rectanular light image on the wall.
Hezz |
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| ace3000_1 |
nope they both are together behind the lcd and it works tested, i know exactly what your talking about with the light calopsing but that only happends when there is distance between them or the focals are realy out for each other. glad to hear about your light engine too, have u anymore info on it bud?
Trev |
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