Difference between revisions of "LED Display"
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{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
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| − | ! | + | ! Resolution |
| − | ! | + | ! ht x diam (ft(m)) |
| − | ! | + | ! LED Count |
| + | ! Cost (for LEDs) | ||
|- | |- | ||
| − | + | | 320 x 240 | |
| − | + | | 1(0.3) x 1.3(0.4) | |
| − | + | | 720 | |
| + | | $540 - $720 | ||
|- | |- | ||
| row 2, cell 1 | | row 2, cell 1 | ||
| row 2, cell 2 | | row 2, cell 2 | ||
| row 2, cell 3 | | row 2, cell 3 | ||
| + | | row 2, cell 4 | ||
|} | |} | ||
Revision as of 00:20, 4 July 2009
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Creator: |
Contents
[hide]Overview
Use LED Tiles to make a static or moving POV display.
Static LED Tile Display
- Have a small 10x100 resolution display for simple text; time, date, outside weather, etc.
- Have a larger display that can display simple low-resolution images, animations and games (pong, space invaders, etc. as the controller permits). Something on the order of 50x100 resolution.
- Have a display that can operate on a resolution comparable to a computer monitor; CGA (320x200) to SVGA (640x480). A computer could be attached to display the IRC channel, presentations, etc.
Cost & Size Estimates
Assuming the tiles are 1" squares, each one is a pixel and cost 50 cents/pixel:
- 10x100 Display - 0.8'x8.3' for $500 (1,000 pixels)
- 50x100 Display - 4.2'x8.3' for $2,500 (5,000 pixels)
- CGA (320x200) Display - 26.7'x16.7' for $32,000 (64,000 pixels)
- SVGA (640x480) Display - 53.3'x40' for $153,600 (307,200 pixels)
In short, let's just stick with the 10x100 Display
Moving POV Display
Had a talk with the guys last week. Brimstone mentioned POV as a way to make a big display with a fraction of the LEDs for a static display. Decided that I could make either a vertical-axis cylindrical or conveyor-belt rotating POV display. Right now, cylindrical is the easiest mechanically, so I will only consider that design. Using surface-mount LEDs (selected for their small profile and their low cost), I can have a compact screen with sufficient resolution while keeping costs low.
Size & Cost Estimates
I am looking at the following LEDs:
- Red - Super Red SMLED in an 0805 package, $0.07ea. Link
- Blue - Super Blue SLED in an 805 package, $0.42ea. Link
- Green - Super Lime Green in an 805 package, $0.25ea. Link / Aqua Green in an 805 package, $0.50ea. Link
From the above, I have the following cost and size estimates for various screen resolutions:
| Resolution | ht x diam (ft(m)) | LED Count | Cost (for LEDs) |
|---|---|---|---|
| 320 x 240 | 1(0.3) x 1.3(0.4) | 720 | $540 - $720 |
| row 2, cell 1 | row 2, cell 2 | row 2, cell 3 | row 2, cell 4 |
I estimate that using the above LEDs I can have a display that will be ~1 foot tall and will use 720 LEDs. The cost would be estimated to be $720 to $540 for LEDs.
Parts List
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Prototype
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Production
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Links
--Spacefelix 16:47, 27 May 2009 (CDT)
