I have an Optoma projector with a dead lamp. I don't want to spend $300 for another 2000 hours of lamp life -- I might as well spend a little more and buy a new and better projector.
I have removed the lamp assembly and I can see the color wheel inside of a hole approximately 1/2 inch in diameter.
I would like to build an external light source and pipe the light directly to the color wheel via a fiber optic cable.
Has anyone done this before or is it a crazy idea?
It seems that the source could be made to any desired lumen output and the fiber optic cable will isolate the heat away from the projector. Also, I have been considering using several LEDs each connected separately to a multi-stranded cable instead of just using a single metal halide or flourescent bulb.
I think LEDs may have several possible advantages:
1. 100,000 hour life -- I think that's 11 years, all day, every day.
2. Available in 6,500k color temperature. Isn't this ideal?
3. Heat-sinkable -- I don't think I will need a fan.
4. Simple power supply... I hope.
Does anyone see any disadvantages compared to just buying a standard replacement lamp?
If my projector is rated at 1800 ANSI lumens, (yeah right) how bright will my source need to be for a decent picture in a very dark room?
Does anyone know how to disable the lamp detector circuit in an Optoma? I haven't opened the case to see if there are opto-couplers yet...
I have removed the lamp assembly and I can see the color wheel inside of a hole approximately 1/2 inch in diameter.
I would like to build an external light source and pipe the light directly to the color wheel via a fiber optic cable.
Has anyone done this before or is it a crazy idea?
It seems that the source could be made to any desired lumen output and the fiber optic cable will isolate the heat away from the projector. Also, I have been considering using several LEDs each connected separately to a multi-stranded cable instead of just using a single metal halide or flourescent bulb.
I think LEDs may have several possible advantages:
1. 100,000 hour life -- I think that's 11 years, all day, every day.
2. Available in 6,500k color temperature. Isn't this ideal?
3. Heat-sinkable -- I don't think I will need a fan.
4. Simple power supply... I hope.
Does anyone see any disadvantages compared to just buying a standard replacement lamp?
If my projector is rated at 1800 ANSI lumens, (yeah right) how bright will my source need to be for a decent picture in a very dark room?
Does anyone know how to disable the lamp detector circuit in an Optoma? I haven't opened the case to see if there are opto-couplers yet...
LED can be a really good idea b/c of their low heat, long life, low power usage, etc. How-ever for LEDs it's REALLY hard to get a nice even light pattern through your LCD. I'm not saying it can't be done or that no one should try it, but it would take a large bit of engineering to design it to put out a nice even light distribution. one person on this board has tried it with like 900 LEDs, and it worked and looks like it worked very well, but small bright spots from each LED could be found. I say if you got the time, and money for it, do it!
Um, I guess I forgot to mention... this isn't an LCD type projector.
I am trying to fix my DLP projector. It's store bought, not homemade.
When you say that LEDs cause bright spots, are you referring to designs with LCD screens measuring 7 inches or bigger?
I don't think a DLP projector has any sort of LCD screen in it... just a bunch of micro-mirrors that switch on and off in sync with the color wheel.
I am assuming that in my case, a more focused beam of light such as that emitted from the end of a fiber optic cable will be advantageous. My current plan is to connect many LEDs to ferrules on one end of a multi-stranded, end-emmiting cable and pipe light to either the old existing reflector, sans UHP lamp, or directly to the color wheel / UV filter opening (about 1/2 inch in diameter.)
Any and all replies are appreciated as I have never heard of anyone doing a similar conversion and I would like some feedback before I start spending money on an unproven design. It seems to make sense to me, but it came to me in a dream so... who knows 😀
I am trying to fix my DLP projector. It's store bought, not homemade.
When you say that LEDs cause bright spots, are you referring to designs with LCD screens measuring 7 inches or bigger?
I don't think a DLP projector has any sort of LCD screen in it... just a bunch of micro-mirrors that switch on and off in sync with the color wheel.
I am assuming that in my case, a more focused beam of light such as that emitted from the end of a fiber optic cable will be advantageous. My current plan is to connect many LEDs to ferrules on one end of a multi-stranded, end-emmiting cable and pipe light to either the old existing reflector, sans UHP lamp, or directly to the color wheel / UV filter opening (about 1/2 inch in diameter.)
Any and all replies are appreciated as I have never heard of anyone doing a similar conversion and I would like some feedback before I start spending money on an unproven design. It seems to make sense to me, but it came to me in a dream so... who knows 😀
Yeah ok, I thought you were talking about an LCD, I've never really messed with a DLP projector before, so really cant help you too much. The design someone had for their LCD model (which i talked about in the last post) they had a large LED array, across a PCB that was the same size as their LCD. Dont think you can do the same with a DLP. Having multiple Fiber lines (one for each LED) could work, but once again i dont know much about fiber either, but i would have to say there is still some optics science involved. Maybe someone here could help you out more-so than i did 😕
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