Fantastic!!!

And the last few for now...
Nice and bright.

The vertical lines in Gandolf's head (dont crucify me if I spelt that wrong ya big dorks JK) are from my reflective wallpaper. They dont show in the projected image.The piece of blackout cloth I have hung up is not quite big enough, and ends around his nose.

And now, same frame with the 100 watt light on in the room.

Not too shabby eh?

IMHO, this is a good size for a home theater. It looks small in this pic, but thats about 90" diag, in widescreen.
I took this pic from about 20' back.
I cant get it much bigger without compramising the image quality, or having to move my head to see anything. This throw ratio works out perfect to have the PJ about 3-4' behind and just above the best view points.

DAM NICE!! Really awesome, awesome projection yoshua! Congrats, and to think you haven't done any tweaking yet. I am really impressed!

And you were trying to make a high gain screen? Maybe you should think about a daylight screen. You now have extra brightness so maybe a late grey paint with your beads?


I think this one of the brightest PJ yet.

Great job.

I have been waiting for months for some one to use a hmi 575 lamp.

Yes,stunning results so far.
Nice work! And a real sexy pj too!
Congrats P

Beautymous!!
Simply Beautymous!!!

Great Job,
R

Wow,
Thanks guys,
it means alot. Could not have done it without my LL buds.

Im glad you mentioned that AV,
I was just going to ask if I should put grey or white under the glass beads... what are the advantages of grey?
Just added contrast?(which I can use) or somthing else?

i kinda thought it was a cat head at some strange angle

Some of the other guys were trying paint that had higher gain in the color range that your PJ makes, if you add a small amount of red green and blue to the paint it will reflect those colors better. But if you mix r g b together it makes black, so you can only use a little this makes grey. I would mach the color spectrum that our lamps make.

The screen then has a better contrast when stray light hits it. Letting you have some light on in the room.

There could be a lot more here. Maybe over at your screen plog.

Cool, I hope to get over there this weekend, and start on the screen. Just need to do a a few more tweeks on the PJ.

As far as tweeks....

The one thing I need to straighten out to be happy for now is my blacks.
Whats the main cause usualy of seeing a little "orange" around the top-mid section of the projected image when its an all black screen?

Its not really orange, but more of a lighter black hotspot. Its only detectable on an all black, or very dark scene, but just enough to be annoying. I think it might be diminishing my contrast a little too, which is somthing I need as much as possible of with this panel.

Heee heee hee!!!

Im lovin this!!

I dont know what That "Pepe" fellow did with this light set-up(he used the same one).. but Lordy this thing is bright. Totaly watchable under all normal lighting conditions. Check this out....

Its still daylight,
100w light on
television on for comparison... and to shame it into serious "PJ envy"

Feel free to tell me to chill out on the diet pepsi. Too much of it has ended up in my pics!
I am in no way afilliated with The Pepsi company.
Dunkin Dounuts on the other hand....

now this is TV, which dosent look great, but keep in mind that its composite out of my cable box, to a mini plug adapter into the dvd player.

Sorry, no TIVO here, so I cant pause TV
I should be able to tweak the TV signal once I get a TV card for my mac.

Havent tried my mac's s-vid to componnent, to mini plug in yet.... that will be fun too.


Woah... I just noticed the ghosting makes it look like Elaine has a RICHEOUS MULLET!

Fantastic.

Impressive! Keep em comin! What collimator are you currently using? Last I checked you were still looking for one.

More movie pics! And lets see that lcd transparrency pic!

I really think there truely is something to these polysilicon lcd's.

Mikau, how about this?

Its just a black sharpie on white paper.
I tottaly forgot I still had this cracked LCD from a screw-up a while back.. its the same model panel, with the AG removed. These little babies are fragile... heh.


Id be more then willing to ship this to someone to do transmittence tests.

Good boy! (throws him a biscuit)

Anyways, hmm.. looks pretty good. Appears to be about the same darkness as paralell polarizers (About 40%) now I just need to hunt for some ordinary lcd pics.

Biscuit Scarfed...

It was tough to get a really good one that I felt acuratley portrayed the daintyness...
maybe we will do another photo-shoot, but i would rather just send er' out to be evalated.

heres one more for kicks.

Aw... so you fried that monitor eh? What a shame...

Who's the guy who's doing all those transparrency measurements? Lemme check. (edit) well mikyd started it, you could send it to him or anyone on that thread.

I just hope those dark spots didn't suck all the liqued crystal into them making the lcd more transparrent.

Just to clarify, thats NOT the panel in the mini-hass. Still going strong.

Interesting point on the liquid crystals, although I think the damage is isolated. My working panel looks just as transparent to the naked eye

Are they two identical panels? Both polysilicon?

yep, same panel.
detailed specs here:
http://www.flatcontrol.com/filemanager/dow...09C362S_V10.pdf

That is AWESOME man! You see now those are the kinda screens I wanna see, some that give us a good size comparison, I wish more people would take screens like that.

Thanks Blake

yeah, i know what you're talking about.. its like you dont have a nice full black image when the screen is supposed to be all dark, there is some light bleeding though at the edges. i used to think this meant i had light leaking from around my frames, but i think its actually light coming in at the very edge of where the pixels actually end on the panel. you'll usually have a small gap between the edge of the lcd panel and the inner edge of your frame. i think light manages to get though there. just my hunch.

looking good btw

Hmmm Thanks Comp,
That would make sense, because I have not permanently sealed the backlight frame thing that clips into the LCD frame. I couldnt decide if I should when I have everything permanently situated. I will try my best to thwart any light leaks there.

Just wanted to post that Arizonavideo has been nice enough to let me do some tests with one of his LUX meters. Hopefully will have some numbers in the near future.
Thanks AV

yoshuaspawn, and what about this LCD `LTD121EX1S` ?
http://www.flatcontrol.com/trade/productview/260/180//en/
it is like ~hdtv 1280x720,.. but what controller to use..? Contrast seems very good..

On flatcontrol.com your panel is specified as 100:1 constrast panel (wuh?)...

And one question, do you still have portable dvd player board or another controll borad for your PJ ?

Just the portable DVD player as a controll board for now.
Yep, it sux about the contrast.... but it has benifits that out-weigh that, and I have also seen it listed higher elsewhere.

I take some comfort in how brutaly honest that spec sheet is. The human eye is only supposed to be able to percieve 200:1 anyway, so I hope to try and get it closer to that within the pj build, and the screen.
plus the AG removal really seemed to help that too.

Resolution, size and contrast is nice, but it says notebook monitor so I'm not sure if its stripable. But even if it were, the response time, 50 ms, is completely unacceptable for movies or games.

If ya wanna know PM me and I'll give you a shipping address. I can do a full spectrum scan of it. Be very happy to.

Nice work BTW! Hope I can get mine done soon.

Edit: Anyone else reading this offer feel free to PM me if you want something scanned for transmissivity.

See this thread for info: http://www.lumenlab.com/forums/index.php?s...ndpost&p=135206

Thanks Durachko,

But mikyd offered to do it, and just sent me an adress I think.
Thanks for the offer and the props,

Your project is lookin good! Im following your thread with interest too.

Well gents,
A big thanks to Arizona who is lending me a light meter

Until then, I will probably be real busy cramming for finals

And letting my knuckle heal.... my dremmel and I had a falling out. Always use saftey goggles AND a vise when your cutting small pieces of steel kids.

Nice thing about a dremmel cut from a reinforced cut off wheel is the coderization of the wound from the heat. Its like instant sticthes This cut is small but down to the bone, and it did not bleed-out at all, and no puss when I poured peroxide on it.

How very conveinent of a battle wound

Ha, thanks Sim,
but its nothing. I just have to remind myself of when Joewerb "exploded" his thumb on a table saw.
Now THAT was a battle wound!
eeewwwww!

Sweetness,
A lux meter from mr AV arrived today!!

Dont worry AV, even though its my birthday today, I wont keep it
I will read up now on how to do a proper 9 point test, or just do some quick, down and dirty ones to give an idea of what im looking at for brightness. Either-way, thanks so much for doing that, and I will probly ship it back to you on tuesday if thats cool. Mondays a Holiday in MA belive it or not(Patriots day+boston marathon)

I think it will be darn good... I have a view sonic commercial pj here from my roomate who is a teacher, and mine can hold its own toe to toe. Of course if you jack up the brightness on the viewsonic it will blow mine out of the water, but i HATE the way the comercial PJ looks with the brightness up high. I actualy bump it down into the negative a bit when I use it.

So, Happy B-day to me
I will do some LUX tests when I finish celebrating w the easter-bunny and J.C.
Were all going out for a pint.

Happy Birthday and Happy Easter to All

AV

Happy Birthday Yoshua, have a good one bud!!!

Happy birthday, Yoshua, and happy Easter to you all!

Can't wait to see some numbers!

Happy B-Day, hope everything is good with you.

WOW, what a nice bright image! well done. all you need to do now is make a screen. how are you holding the lid down? if you need some of my compression latches let me know.

Yoshua,
I have a question regarding your light box. I have one from a Dukane 680 OHP that I'd like to use in a pj. I notice, in mine, that the assembly holding the lamp, reflector, and condenser is mounted on brackets angling it downward toward a mirror inside the OHP. Is this the same light box you used? If so, did you modify or remove the brackets under the lamp assembly so the light shines straight out the window of the box? Or, did you angle the box? Or is this not the same as your box? Thanks!

Thanks for the b-day wishes gents,

hope you all had a nice easter weekend.

Well, I did a few quick "down and dirty" LUX tests.
I want to get AV the meter back, and Im still tweeking some things, so I just took a couple general reads for reference.
one with the LCD off, and one on a bright scene from LOTR.

gotcha,
good observation.
I actualy just proped up the front "feet" that bolt the light engine to the light box with some washers to level it out. Im thinking about tweeking that to see how much differance it makes.

OK, now for some numbers.
Remeber, these are just peliminary,

and Im not even sure I did these right.
but I took pics of the process sort of, on the two reads.

So 1) Just a random bright scene from LOTR:

127 LUX here...

It didnt vary too much at different points.
No greater than a differance of 30 anywhere on the screen.

yoshua, use paladin's test program from here, look up the white background with the 9 circles. This will help.
http://www.lumenlab.com/forums/index.php?showtopic=10084

And this is with the LCD powered off,

Cant read it in the pic here, but this is 158 LUX.

You can clearly see Im having some fresnel placement issues here, but as I said, im still tweeking.
This was the first day in a while I worked on the PJ, due to final exams.
Over in two weeks

Thanks Simul8r,
will do.

doh! wait a minute.... unfortunetly my now "grossly outdated" G4 powerbook wont run an exe.
Mac decided to do that awesome, ground-breaking dual platform thing on the laptop right AFTER mine :angry:

quote name='yoshuaspawn' date='Apr 20 2006, 03:04 AM' post='137314']
Thanks Simul8r,
will do.

doh! wait a minute.... unfortunetly my now "grossly outdated" G4 powerbook wont run an exe.
Mac decided to do that awesome, ground-breaking dual platform thing on the laptop right AFTER mine :angry:
[/quote]
hey, these aren't terribly professional looking but try one of these for a 9 point ansi...one is 1024x576 which should be good for you?
Click to view attachment
the one above is the 576p one... I just resized it so the edges of the box got cut off... but basically all you do is divide your screen into 9 equal boxes and take a center reading from eac, add and average them and multiply by the square meters of the screen(w1 sq. meter = 1550 square incehs)
Click to view attachment