Qubic Light's LED Projector Looks Good - Page 9 - AVS Forum
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post #241 of 254 Old 06-04-2007, 03:12 PM
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"Do you think is really low numbers for a front projector?"

It's about a quarter of what a typical UHP lamp puts out, but it depends on how much larger a percentage of the light makes it to the screen than a conventional pj.

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post #242 of 254 Old 06-04-2007, 05:10 PM
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Quote:
Originally Posted by vsv View Post

"The new Phlatlight PT120 LED chipset has an emitting area of 12 mm2. The red chip emits 660 lumens, the green 1550 lumens, and the blue 250 lumens."

Do you think is really low numbers for a front projector?

That's actually pretty good.
The bottleneck seems to be the BLUE LED.

In order to get D65 white from RGB LEDs we need:

43.1% RED, 33.5% GREEN, 23.4%BLUE

So with 250 lumen of Blue
Red becomes 460 lumens
and Green becomes 358 lumens.

That adds up to 1068 lumens at 100% efficiency.

A 3-DLP system has an efficiency of about 35% which means that the projector will have 373 lumens max.

That's not bright but it will only get brighter.

Next projector will have LEDs, >=1080 res, >=10 bit color, >14bit CR, >9 bit ANSI CR, >=120Hz, >16ft.L on 12ft 2.35:1 screen, <$12bit price

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post #243 of 254 Old 06-04-2007, 10:01 PM
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"A 3-DLP system has an efficiency of about 35% which means that the projector will have 373 lumens max."

That's pretty good.

But it seems that an LED system should easily exceed that, assuming the colors are near the proper primary colors.

There would be no losses from splitting and then recombining colors, nor from filtering.

I don't really know, but I'd guess that effciency would be at least double.

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post #244 of 254 Old 06-05-2007, 10:20 AM
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70% efficiency would be awesome.

We're talking very little cooling will be needed. Big savings right there and the reliability shoots up! Win-win.

Next projector will have LEDs, >=1080 res, >=10 bit color, >14bit CR, >9 bit ANSI CR, >=120Hz, >16ft.L on 12ft 2.35:1 screen, <$12bit price

My 1st line array design

My ongoing Line Array Design
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post #245 of 254 Old 06-05-2007, 10:35 AM - Thread Starter
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Quote:
Originally Posted by noah katz View Post

"Do you think is really low numbers for a front projector?"

It's about a quarter of what a typical UHP lamp puts out, but it depends on how much larger a percentage of the light makes it to the screen than a conventional pj.

200W UHP bulb have 8000-10000Lm, but "with little help" of color wheel on the screen only 1/10 of bulbs light.

With PT120 and 0,7" DMD possible to get ~500Lm and a few more with new PT180 RGB LED optimised for 0,9" DMD.
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post #246 of 254 Old 06-05-2007, 11:35 AM
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"With PT120 and 0,7" DMD possible to get ~500Lm and a few more with new PT180 RGB LED optimised for 0,9" DMD."

That's fully competitive with todays' HT pj's; the JVC RS1, which is considered rather bright, is right around that.

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post #247 of 254 Old 06-05-2007, 01:42 PM - Thread Starter
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Quote:
Originally Posted by noah katz View Post

"With PT120 and 0,7" DMD possible to get ~500Lm and a few more with new PT180 RGB LED optimised for 0,9" DMD."

That's fully competitive with todays' HT pj's; the JVC RS1, which is considered rather bright, is right around that.

Only facts:
1.PT180 RGB LED exist and optimised for 0,9" DMD
2.0,95" DMD is fullHD 1920x1080 and used for front projectors!
3. 500-700 Lm LEDDLP front projector is possible today

LED Light engine with 3 SXRD can be brighter and better if this be made by Canon ...
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post #248 of 254 Old 06-05-2007, 02:17 PM
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Well, this is what I'm waiting for.
Bring it on!!!

Next projector will have LEDs, >=1080 res, >=10 bit color, >14bit CR, >9 bit ANSI CR, >=120Hz, >16ft.L on 12ft 2.35:1 screen, <$12bit price

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post #249 of 254 Old 06-05-2007, 07:42 PM
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Quote:
Originally Posted by Free View Post

I have several flashlights that have Luxeon III bulbs in them. Basically the L3 is just a version of the 1W Luxeon that is able to be over driven. There is a significant blue tint to the Led when you over drive it.

All in all, I am a LED fanatic, so I really hope to see a decent LED based projector in the next couple of years.

With that current projector, sounds like all they need is one of Vutec's 9 gain screens


i want to see them use the x-cree edition leds, or even the p4 leds!
i have the lp M1 hunter w/ cree led and it can light up a building at night!

can't wait to see this used in the pj market
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post #250 of 254 Old 11-16-2007, 08:47 AM
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Please somebody help me ! i have optoma ep 732 projector i want disconect ballast and uhp bulb (bulb is brocken finish ) i dont want new i want change system light ( led is god idea ) but i must first eliminating uhp system. maby someone help me how?
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post #251 of 254 Old 11-17-2007, 03:55 PM
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Well, we are supposedly getting some samples of a 100 lumen LED unit to look at soon.

Oh, and Bronco, not really an option. Replacing your PJ's UHP system with LEDs is esentially not possible.

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post #252 of 254 Old 01-09-2008, 02:38 PM - Thread Starter
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The collaboration of Luminus and TI has more than doubled brightness from last year enabling a range of new display products, including thin, high contrast, wide viewing angle TVs.



Among the prototypes being demonstrated at the DLP products booth at CES (Central Hall, Booth #8205) is a slim DLP HDTV illuminated using PhlatLight LED technology. The DLP TV, features a contrast ratio beyond 500,000:1, is ultra light and thin for easy wall mounting and due to the increased brightness, can use new screen technology doubling the viewing angle to match viewing angles of other flat screen technology.



Our continual improvements in brightness have opened up a new realm of display product categories previously thought impossible with conventional LEDs, said Christian Hoepfner, vice president of products at Luminus Devices, Inc. With the brightness levels we've reached with TI so far, we're on track to break the one thousand lumen mark this year with a front projector. This achievement marks a significant breakthrough, not only in terms of performance, but also in the creation of exciting new large screen HDTVs and home theater projectors.

http://www.luminus.com/content1244
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post #253 of 254 Old 01-09-2008, 07:51 PM
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how much brightness is needed before the technology can be applied to front projection?

1080p and lossless audio. EVERY BD should have them both.
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post #254 of 254 Old 01-09-2008, 10:48 PM
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"The DLP TV... is ultra light and thin..."

How do LED's allow it to be so thin? It seems like no matter the light source, it requires a really fancy mirror to bring the image to focus in such a small package.

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