LED For backlight

the_ice_cube · 15th June 2004, 06:07 AM

I noticed a while ago that someone was trying to make a projector with an array of ultra bright LEDs, but failed. Has anyone since succeded, as it would be great for heat and amout of hours the last.

I found this link to an electronics store thats selling a LED that offers up to 120 lumes and little to no heat. Wouldn't a few of these do the trick?

http://www1.jaycar.com.au/productVie...=&SUBCATID=676

If these would be any good please tell me

>i'm not sure what the fancy thing around it is, but i think you could take the led from the center?

doughboy · 15th June 2004, 12:35 PM

Most here are using a 20000 - 35000 lm light source. You would need a whole lot of leds which drives the price way too high.

the_ice_cube · 16th June 2004, 10:31 PM

how do lcd projectors (retail) work with only around 600 ANSI?

elstcb · 17th June 2004, 10:34 AM

600 ANSI is a very low rating, and equates to about 6000 lm at the bulb (once the effect of all the light losses are considered). Most modern commercial projectors have more like 2000 ANSI which equates to 20000 lm

15th June 2004, 06:07 AM	#1
the_ice_cube diyAudio Member Join Date: Jun 2004 Location: Queensland	LED For backlight I noticed a while ago that someone was trying to make a projector with an array of ultra bright LEDs, but failed. Has anyone since succeded, as it would be great for heat and amout of hours the last. I found this link to an electronics store thats selling a LED that offers up to 120 lumes and little to no heat. Wouldn't a few of these do the trick? http://www1.jaycar.com.au/productVie...=&SUBCATID=676 If these would be any good please tell me >i'm not sure what the fancy thing around it is, but i think you could take the led from the center?

15th June 2004, 12:35 PM	#2
doughboy diyAudio Member Join Date: May 2003 Location: NE	Most here are using a 20000 - 35000 lm light source. You would need a whole lot of leds which drives the price way too high. __________________ Benq 557s, Split 12.2 fresnel, 250W Ushio, S50 ballast, beer can reflector soon to be oneida stainless ladle

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16th June 2004, 10:31 PM	#3
the_ice_cube diyAudio Member Join Date: Jun 2004 Location: Queensland	how do lcd projectors (retail) work with only around 600 ANSI?

17th June 2004, 10:34 AM	#4
elstcb diyAudio Member Join Date: Sep 2003 Location: Loughborough	600 ANSI is a very low rating, and equates to about 6000 lm at the bulb (once the effect of all the light losses are considered). Most modern commercial projectors have more like 2000 ANSI which equates to 20000 lm

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