Just want to share what I'm finally manage to do. Use a raw Planar 320*240 EL display with the Pi.
The screen is really nice, but need raw sync H&V signals plus a 4bit data bus. I tried to use a RAIO8835 controller and the GPIO of the raspberry, screen frame buffer and so on. But I failed due to lack of knowledge. Then I decide to use knowledge I have, electronics. Means transform directly the DVI signal with a TI chip plus an FPGA. That also allow me to generate a half tone and grey ordered dithering.
Info there :
Now lets connect sensors to make a weather station !