Hi mvdhoning, I don't know if an A4 size screen exist but for the moment we are looking for "standard" screen sizes and resolutions.
An idea of the perfect screen panel would be:
- SVGA (800x480) or XGA (1024*768) (10~13 inches)
- RGB interface
- LED backlight
But after a quick search, it seems to be hard to find a XGA screen with a TTL RGB I/F and even more difficult to find 10~13 inches displays equipped with LED backlight.
Concerning the LVDS I/F on XGA I'm not really surprised: we have a pixel clock which samples data at 80~85MHz... Diaphony on a simple parallel cable can be a real disaster. And if you have to use a shielded cable for each of the 24bits + syncs, you will not obtain a thin cable...
I've switched back one of my linux device in 800*600 under X. It's usable but is that enough for a consumer product (ie. EFIKA laptop) in 2007 ?
LVDS screens could (and I say could, sure it's not my prefered solution) be use if we find the appropriate serializer. DVI is also LVDS and it's easy to handle... Serializer are also often expensive. I have to check that.
Do not hesitate to post your comments/opinions on the screen size. I'm conviced that the screen have to be chosen carefully because it will decide of the electronics needed for driving it (price). It's also an important parameter conditioning the sucess this project.
Stellae (project 337)