Da lil ally 7" lilliput project

[I_eat_flowers]

Originally posted by grant
I see that you have made a working lcd projector contained in a great looking case. Im used to seeing people over here trying the overhead projector method. I note the light source to the mid far right and output to the bottom for left. light goes thrugh a glass plate striking the lcd and being ridirected toward the lens that now has a tube to allow extension.

to clear my head-
your light source is first striking a glass plate. is this for diffusion or another reason?the plate you see is an ir/uv filter

there are a number of panels surrounding the area between the light source and lcd that are not in the path of light. are they reflectors to gather light that has scattered in hope of increasing light output?(ie gathering light lost and redirecting toward lcd again)
this are wooden plates avoid bouncing light to the objective lens and lead cool air to the light engine

is the lcd controller board located below and left of the lens mounted to the bottom of the box??yeah, its mounted on the bottom


could you have not used a mirror at all and had the light path just be from light source to lcd to lens? as in a straight line? lcd can be reversed to corrct picture right??COLOR=crimson]i used that mirror to shorten the enclosure. straight would make the enclosure longer. the lcd has no osd to turn and flip the image. you have to think twice before tightening :-)[/COLOR]


the lens type used and generally speaking required I woudnt know much about... I understand concave and convex thats about it. what is special about these lens in use? I have/had a number of lens assemblys from rear projection big screen tvs do you think these are what is required?the lens is a common vari-focus lens used in ohp's. lenses from rearpro's could be used too depending on focusing length. the should have at least a fl corresponding the diagonal of the desired lcd.


your box looks vary profesional as apposed to the ones people talk about/do here.....


great accomplishment I will keep reading and thinking about your work for some time................
Grant

hey grant,

thx for the nice words. i tried to answer ur questions as good as i can. i hope it helps.

cu.
ief

[ringram]

I'm interested in the zoom mod you've made. By moving the objective lens closer/away from the focal point, aren't you also affecting the focus on the screen? This is working with your varifocus lens, but would it work with a fixed triplet lens?

[Naj]

Hey, nice projector!

I have the same Lilliput screen as you, the 619GL-70NP

You know the Dat Box your using, the one you bought from....

http://www.lik-sang.com/info.php?cat...ducts_id=3235&


I know its has S-video in and RCA in, but does it have VGA out...? Can you explain what XGA out is...?

And oh, i have plugged the RCA cables to my TV and DVD but i cant see any picture, i can hear sound thats it.... any idea what im doing wrong..?

[joew26mpls]

Awesome PJ!
What do you use for a UV/IR sheild? One piece dual function material?

[I_eat_flowers]

Originally posted by ringram
I'm interested in the zoom mod you've made. By moving the objective lens closer/away from the focal point, aren't you also affecting the focus on the screen? This is working with your varifocus lens, but would it work with a fixed triplet lens?

yeah, by moving the objective closer/away the pj's size alters. to get ist crisp turn the lever of the vari-focal objective.

no buddy, it wont work with a fixed triplet coz it has a fixed focus.

[I_eat_flowers]

Originally posted by Naj
Hey, nice projector!

I have the same Lilliput screen as you, the 619GL-70NP

You know the Dat Box your using, the one you bought from....

http://www.lik-sang.com/info.php?cat...ducts_id=3235&


I know its has S-video in and RCA in, but does it have VGA out...? Can you explain what XGA out is...?

And oh, i have plugged the RCA cables to my TV and DVD but i cant see any picture, i can hear sound thats it.... any idea what im doing wrong..?

hello naj,

the sub-d 15-pin output delivers VGA (800x600) respectively compressed XGA (1024x768) reso.

so, connect ur dvd to RCA in and vga-out to your liliput screen. that's it.

[I_eat_flowers]

Originally posted by joew26mpls
Awesome PJ!
What do you use for a UV/IR sheild? One piece dual function material?

thank ya.
the IR/UV shield is from a window glass. It has a silver coating on one side. These glasses are used in windows to protect from heat. They transmit normal light and block IR. Dunno where to get this in the U.S., but I think you can get more information if you go to a glazier and ask for it.

The coated side must show to the light. You can measure a resistance of some hundred kiloohms on the coated side to find out the coated site. I hope this helps....

[affv]

what is the LCD Model
Lilliput ???