CurtPalme.com Home Theater Forum

Mark_A_W · Posted: Sun Jun 06, 2010 12:30 pm Post subject:

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

Please re-read my last post carefully.

I can show you 2000 lumens out of an LED with an active area of just 12 square millimeters (That's 3x4 millimeters) and 600 out of 36 square millimeters. (That's just 6x6 millimeters, or equal to that in a different aspect ratio. It's about the size of a square that's a quarter inch on a side. 16 of them would fit into a single squre inch.)

When making an LED matrix on silicon, there will necessarily be some space between the elements but we're talking about microns. Assume that no more than 50 percent of the die area is actually LED emitter area.

We also have to stuff three channels into that die, not just one. And let's assume that we don't have vertically stacked
transparent pixels. Let's set them up with a lateral offset like the pixels on an LCD screen.

We can then get an addressable pixel array in twice the die space of a monochromatic LED. 6000 lumens output in
72 square millimeters, and it would be about 1/4 by 1/2 inch in area. Now triple that for three colors. We're looking
at a die area of 1/2 inch by 3/4 inches or the equivalent area in a 16:9 aspect ratio.

Heat management is an issue but remember, we can't YET make an array like that with CONSISTENT color temperature
and output curves on a pixel-to-pixel basis. By the time we CAN, we'll have greater efficiency LED technology which
means less heat to manage per lumen of output.

An 18,000 lumen (full white) light CANNON engine will be able to be stuffed into your shirt pocket with room to spare.

You might fit several in there.

LEDs CAN be fabricated on the same per-pixel scale as DMDs. We can do that NOW. But they're not consistent.

CJ