Some TFT source drivers have LVDS built in, so you have to drive the
module that way. Its getting more common, especially for larger monitor
and laptop type panels.
Dave Thomas wrote:
> Before I decided to try a bluetooth connection between my laptop and a
> remote display, I'd planned to use LVDS.
> LVDS is "Low Voltage Differential Signalling". It's purpose is to
> allow the display to be driven digitally on very long cable with
> mininum cable EMI.
> Typically, there is a driver at the PC side of the interface and a
> receiver at the display side. From memory, there are three
> differential signal pairs, one each for a serial bit stream for the
> red, green, and blue colors. Probably a differential clock pair as well.
> So, the "converter" would convert the low voltage differential, serial
> bit streams into the parallel bits required for a TFT display, say 5
> bits red, 4 bits green, and 5 bits blue.
> If the gumstix will be located close to the display, you'd be better
> off to bypass the LVDS converter altogether and drive the display
> signals directly, unless the LVDS receiver is somehow integrated into
> the display. Otherwise, you'll need an LVDS driver to convert the
> display signals output from the gum to LVDS, and the recevier to
> convert back to parallel, 5 volt or TTL level signals typically
> required by TFT displays.
> LVDS transmitter and receiver chip sets exist.
> Dave Thomas