LED+FLYEYES+COLLIMATOR=LED projector

[chinajin9999]

it is an interesting topic, to refurbish the commercial projectors.
But there is a long way for LED lamp to replace troditional projectors totally.

Only if, the light of more than 6000 lumens can be gathered to be a parrelel light ( no larger than 1.3"), the LED can replace the traditional lamp. Now, the single LED lmap can give off no more than 300 lumens. Becasue of the physical dimension restrictions, 20 pcs of LED lamps can not be put together ( to make the size less than 1.3"), so we have to wait

I am not sure I explains it very clearly,hope you all understand it

 

[giorgos18]

there's a nice long thread at lumenlab about some guys that have successfully retrofitted commercial projector with LEDs and some more busy with it right now so it may be worth your while to have a look. The results are pretty good, and with new high power LEDs being released (eg Phlatlight's LEDs are supposed to be used in new commercial units), the results look promising

 

[krissboner]

Thanks giorgos, i'm awere of that tread.Also there is german and french forums expirimenting whit leds too.

 

[krissboner]

Thanks for your anser chinajin .I may have to buy one of those 150lm lcos/dlp and take it apart to stady it.Too bad there are low resolution 800x600 max. You are absolutly rigth, the bigest problem is optics and the large # of leds.

 

[ywh]

Re: To design the engine

the uniformity is more than 85%
1. the middle, lux=86
2. the corner, lux=64
3. the ansi lumens, more than 140 lumens

Hi brocade !
what is the size of your screen?

have you used LightTool to build a model of your system? can you show some pics?

 

[chinajin9999]

Hi,
Thanks for your professional Q.

1. This is the result of the test. and the screen is 72" ( 4;3)
2. we have the simulatiing result. I will post it a few days later. According to the data, it is even better.

3. You can send a msg to me for more info abt it

 

[chinajin9999]

Hi,
The tracking result is as following.
Here in the diagram, the light is from the flyeyes, but not from collimator.

Because, the light from collimator is just parrelel.

 

[ywh]

thanks !
there was a problem to add LED,
this diagram is like yours I think. I drawn ther other
in the projector lens, there is a image of flyeyes lens, diameter of your flyeyes lens is about 65mm, so the image of flyeyes lens is 65mm too if the L1=L2, the effective aperture of most projector lens in China is about 65mm,

you have to get 80mm effective aperture if you need to add LED,
or the light of other LED can not entrance pupil

 

[chinajin9999]

On one hand, you are right.
but on the other hand, you should learn more about the collimator.

To design the flyeyes is not difficult, but to design a perfect collimator, is very very difficult.

sure, I wont disclose how to design the collimator

 

[ywh]

I have not talked about collimator, I found a the law of L1 and L2.
you have to get L1 > L2 if you set a bigger light source, like your collimator,
this is way you need the plane mirror, you can not reduce L1. your L1 is about 240mm. so longer.

 

[TESCORP]

I tried to use some LED's in one of my builds, heres what I did. Really didnt work that well but it was a totally different design. hot spotted every where. I have since moved up to a Plasma Light engine.