History question

Lee Harker

I'm hoping someone on this forum has seen a magazine article that I remember from quite a few years ago. It was about an LED display made of a single column of LEDs placed in a vertical row. The LEDs were sent one column of a graphic image at a time at a fairly quick rate. The idea was·that as you walked past the display, like through a doorway, you would·see the image in your peripheral vision almost accidently. If you looked directly at·the display all you would·see was a bunch of blinking LEDs.·I don't remeber where I read it but it would have been in one of the more popular electronics mags from many years ago.
Anybody recall this?
Thanks

skylight

Bit like the sprung loaded persistence led clock displays you twang from side to side?

Franklin

There have been several articles I can remember one was in N&V for a bicycle wheel. Google for POV (persistence of vision)

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- Stephen

Lee Harker

Well it's kinda like the persitence of vision displays exept that the display stays stationary and you see it when you walk by. It may be the same thing but I'm not sure.

Franklin

Haven't seen any on that aspect.

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- Stephen

Dgswaner

I've seen both concepts, they are one in the same except that one is moving the other is not. you may have to vary the scroll rate where it's not spinning IDK.

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A complex design is the sign of an inferior designer. - Jamie Hyneman, Myth Buster

Paul

I suppose if it had an apperature or lens that you looked through to see the leds as your head moved it would be the same effect as the leds moving.

my two cents.

Steel

It was called the Obelisk...Here is the project page.· Very creative for it's time· [noparse]:D[/noparse]

http://sub-zero.mit.edu/fbyte/ledart/obelisk2/