DIY Video Projector Part II

[ace3000_1]

slize ummmmmm do u know what u are talking about? why wouldnt i get a sharp picture or bright picture with my 5.6inch lcd? i can get more light through mine than yours , concentrated light that is, and as for sharpness that comes down to the lens u use not the screen, u can controll the screen with the contrast setting lol as i told u i have mine set to sharp meaning more light gets through and i get a sharp picture.

Trev

[ace3000_1]

slize my reso is actually 960x240 dots, the reso as in pixels is 320x240 pixels, have u tried a small screen with that reso slize? if u havnt then u dont know what u will and wont get, i bet u dont even know what it looks like on the wall, crap u might asume, well ill tell u the truth its not actually i can watch tv on it no worries at all and just remember as_u_me makes an as out of u and me more u in this case lol

Trev

[slize]

yes i have, i used a 5,6 PSone tft (320x240) at first, and it looks like crap compared to what i have now (756x568 PAL)... and i will get 1280x1024 can't wait to see that picture...

do YOU know what you are talking about?

i WILL get more light on the screen than you, because i don't have to enlarge my original picture from the panel as much as you because i use a 15".

Just imagine you want to have a 100" projected picture. from a 5,6 panel the magnification factor is 17,85. My magnification factor is 6,66. That means each dot on my projected image is 2,6 times brighter than yours. so far for the brightness of your picture.

now to the sharpness. nstc format is 640x480 that means you have half of the resolution of nstc enlarged to lets say 10 times bigger... that HAS to look crap...

by the way: i don't worry about enough light, i have a 400W MH bulb with 45000 lumens...

i thought this forum was for ideas and help and not for beeing attacked by some people who think they are heros; i have already built a projector with very good results...

[ace3000_1]

ok what ever u recon u better tell sony and the other leading proffesional projector companies your theory too then cos they must have it wrong aswell, i realy dont know what has crawled up your *** but i havnt given u any ****, i actually agreed on the contrast thery its obvious u either can read or u cant comprehend, now i am going to give u **** im not going to give u the benifit of the doubt and realy i dont give a **** what u make, u have alot to learn obviously, read the forum like everyone else does eh? your conclusions are way off of the handle and also i may add very wrong, so shut up and think about what u are saying slize, email sony while your at it or a proffessor in science and lets just see if your thery is true eh? give me proof i want to see proof! back your crappy *** **** thery up! until then **** off

[ace3000_1]

u have a bigger screen area to light up not to mention angled light rays, GET WITH IT!!!! MEANING U NEED MORE LIGHT!!!!

[Negative Design]

Slize where did you get a 45,000 Lumens 400 w from, do u have a link?

I thought 400w where 36,000 ..but i can be wrong

ace, are in "da Hood" now LOL

hehe you know what i mean...

[sgdvd]

yeah!

can't wait for round 2!




this forum's fun.

[rapsac]

This forum is getting better by the day....
The amount of light has nothing (at least theoretical) to do with the dot pitch of the LCD.
GOOD panels with high res. are almost as translucent as GOOD panel with lower res.
In these panels the pixels are smaller (less translucency) BUT they are spaced closer together (more translucency).
Now ask yourself this question: What will be a GOOD panel? A shitty panel for consumer electronics (car/portable dvd/tv player) or a $2000 15" panel?

What you should watch though are the response times (likely to be crappy for the NEC as it is an old panel), contrast levels (also crappy, 200:1 is just too low) and size; 15.4 is just too big for a fresnel. Likely you will end up with a 1024x1024 display. Better go for a good 1024x768 panel with good response times and decent contrast levels.

And I'll say this again: DONT WASTE TIME/MONEY ON ANY PANEL THAT IS USED FOR PORTABLE CE!!
These are all crap in every department!
Watching low res XXX clips and aerial TV is about all they can be used for!!

[ace3000_1]

well mine was my first for just an experiment, some seem to forget that no names slize to see what i got with different lights and lenses, its was a learning curve, nothing for a pernament use, i have posted that before, im getting anew 6.4inch lcd ok its 800x600 native 1024x768 compressed and contrast is 200:1, its coming out of an old infocus lp220 and i have seen screen shots of this lcd in action and i am inpressed, im getting it for $60 so no great loss if its crap, in the future in the near future im going dlp for a second projector or my main movie projector, that way i get both worlds for a reasonable price and 2 small units i have room for.

Trev

[rmccoll]

Alot of light is nessecary, but if you can not waste that light with over head projectors because alot of light is lost between the stage and the lens, a custom case would be your best bet also you should choose a lens that a low focal length 150mm to 300mm is best for 14'' and 15'' inch lcds the lens will only have to 12 inches away from the lcd use this equation:

D=F(S/A+1)

D=distance from screen to projector

F=focal lenght of lense

S=area of screen

A=size of lcd

found this at www.3m.com

Hope this can help anyone