large displays

[George]

does anyone know of a good source of large matrix displays like those traffic information signs mounted on trailers? And how would they be controlled? I don't suppose they'd have the hitachi protocol - RS232?

Thanks

[ronsimpson]

Start out with these links and then branch into their competition. A million years ago, in another lifetime, I designed this stuff.
http://www.lumivision.info/html/vultron.html
http://www.amtechfab.com/services.htm

[ttease]

Try www.globalsources.com, lots of manufactures with lots of sizes.