My 4" Lcd Project, Results

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#124
MMMh.. are you shure? as I mounted my 16.000 CD today, an well, it's very bright! You can see the difference between the firts pic I've posted (with 8000cd) and now!
Ok, It's not visible in daylight, but yes with lights on! I'm gonna buy the 48.000cds er111 lamp as soon as I get some money..

By the way, according to this equation my setup is

LM=0.00096*16.000*(8sqr)= 983.04 LM ?!?

So, assuming that the lcd transmits 10% light, 98.3 LM at the panel.. so less then 50 LM on projected image, impossible to see even in darkness!
 

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#127
MMMh.. are you shure? as I mounted my 16.000 CD today, an well, it's very bright! You can see the difference between the firts pic I've posted (with 8000cd) and now!
Click to expand...

Heya guys, i can garentee you that your bulbs arent 16000lm, for starters you cant look at a 16000lm bulb without going blind for 30mins in a second lol.

Trev
 
#128
Actually it doesn' t really matter how many lumens out there 🙂 The importante thing is Disa's results, he got acceptable results at dark conditions, so dichroic lights are very functional for movie watching at night imo.

BTW, we' re waiting better pictures with better camera Disa ! 🙂
 
#130
bulldog5046 said:
i can tell you now that, that is incorrect, below is the formule to workout lumens from candles.

lumens= 0.00096*(candles)*(beam half angle in degrees)²

Thanks,
Ryan Edge
Click to expand...




Im dont know for sure forumal wise but this mayhelp ya prove or disprove it. OFFICICAL spec of ENH is 16,000CD at 25o beam. Raw lumens I did get. Krypton Tunsten halo makes 22lumens per watt. So therefore 250watts or 16,000cd is 5,500 lumens. And that is correct. So if yer formula checks with that, its right on.



"Heya guys, i can garentee you that your bulbs arent 16000lm, for starters you cant look at a 16000lm bulb without going blind for 30mins in a second lol"

I agree. My mh 175 is somthing like 15,000 lumens and the bulb itself will blind you momentarily. So will 5,000 lumens though too. Im blind when walking back toward pj if I look at the output lense with no lcd in there. So 16,000Lm Yea, ya know it when ya see it.
:bigeyes:
 
#131
lumens= 0.00096*(candles)*(beam half angle in degrees)²
Click to expand...
Thank you, thank you, thank you !!! I have been looking for that formula for a week now, all I found was a lot of solid-angles stuff.

As you now can see all the 50W 12V halogen bulb give the same total light output.
50W 12V 10o = 13000cd = 1000lm
50W 12V 24o = 4400cd = 1000lm
50W 12V 36o = 2200cd = 1000lm
50W 12V 60o = 1100cd = 1000lm
The only difference between the bulbs are that you can move a 36o bulb closer to the lcd and with a 10o you must move it more far away.

In the first projector i build I used 4 50W 12V 10o bulbs, and I almost got blind so bright was the light from those bulbs, unforunately does not 4 bulbs work. I can absolute recommend Philips Brilliant pro with 3200K they give a very white light, not yellowish at all. One thing I can say those dichoric lamps are a much brighter alternative to the BAD ohp-setup with condensor and spherical-reflector and thats one reason you get so nice results.

Halogen lamps has one very nice thing that MH don´t it start immediately, you don´t have to wait 2-4 minutes for it to warm up.
 
#133
Hey,I know (now) that my bulb is not 16.000 LM but CDs, but I'm sure it's not 1000lm as posted! If I look directly to the bulb, I get blind to for a while, but that's appens with almost all kind of lights, except fluorescent, so it's not a good indication..

Anyway, I think if my lamp, even if I don't know how mny lumens it has, has 16.000 CD 8°beam and it's so bright, with the e111 bulb, with 60.000 CDs 8° beam, I will get 3.75x the brightness I currently have.. and nobody could doubt of that! So I think it would be surely usable with lights on..

Sorry for bad pics guys..I will take some professional ones with my slr 35mm, I will buy the right film soon

😉
 
#134
"In the first projector i build I used 4 50W 12V 10o bulbs, and I almost got blind so bright was the light from those bulbs, unforunately does not 4 bulbs work."

Yea me too. I used two EXT 50 watt halo spot bulbs and the glare was the issue of course. Like a uncontroled light source causes. Want even more power then 4x 50watt? Same size and type reflector and everything but 25o beam? ENH. Is 250watt mr16 dichroic. Its more efficient cause halo gets more lumens per watt as it gets hotter (ie higher watts). 5,500 lumens is real nice for no work. 175hours isnt bad for a $10 spot. Since yer a fan of these small bulbs I thought Id pass that on.

"One thing I can say those dichoric lamps are a much brighter alternative to the BAD ohp-setup with condensor and spherical-reflector and thats one reason you get so nice results."

hehe were on the same page-I got same results. In compairison I didnt have best bulb either. But thats what it was about, easy cheap bulb. That I can find anywhere. MH in these would be nice-specially one customised in the reflector like these mr-16 pj bulbs! They make'em sure enuff. I just cant seem to get my hands on any yet-or even responses from half the ones I find! Soon or later I think Ill get lucky. I did with 3m Vikutti films about 2 years ago with the polarised films and BEFII. I'll stick to my guns and keep emailing even if I have to buy 10 of those mr'ish style mh's. Im sure they'd sell if sold at cost!🙂
 
#136
i looked at those 1,000,000 candle lamps buti thought they would be just tooo hot, how does it perform?

anyways, i got my two replacment lcds today but i have a problem with them they look like there displaying 256 colours when there displaying 24bit, anyone else ever had this problem and know how to fix it??

Cheers,
Ryan Edge
 
#137
Hey guys, couple o news..

I got my new panel, the controller board i awesome,lot of features, remote controlled, flipdown function etc.. butthe panel is with a large black dot in the bottom-right corner.. so if somebody know where can I find a replacement.. it's a 5.6" TFT with 2 flat ribbon cables, one 17 and the other 11 pins.. the monitor is made by Innovatek

Second news:
I just received from Honk KOng a projector named Mega Pro Game projector, I bought this as it uses the same principle of dicroic light, but it's a commercial unit! I mean, is made by a factory! And it's very cheap: 249$ + shipping

I disassembled it, and it uses a 12v 50w dicroic as mine, but it has also a surface mirror and instead of fresnels, a big double convex lens

anyway, the results are INCREDIBLE! It's usable in daylight, ok, a little bit washed out, but I'm wndering this night what will I see..

The question is, how can it be so bright??? It uses the same kind of light.. I looked at the power supply, maybe that's the trick..
It's a 12v 5 Ampere adapter..

I would like to power my lamp with something like 16-18 Volts to see what happens.. Does anybody knows how can I do that?

I will post soon pics of this projector!

:hot:
 
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