Thanks for the suggestion! I do have one of those PSone screens from back in the day, though its being kept with a friend at the moment. I think the power draw and tech from these car backup type screens is likely better, though.
Noticed your link went to a Sega related display hack. Coincidentally my original intent was to use the S-video mod output to the screen to revive a Sega Nomad with a dead screen, but that limits my options to a 3.5" size. I've since just settled on composite since it seems to be good enough at that size, though it would be nice to know if its possible to hack any of these inexpensive car backup screens to s-video capability for future projects.
One other thing I was wondering if you might have any insight into pertaining to these car-backup lcd monitors, is why some models have a major problem with the video signals displayed by the Sega Genesis game system in particular. The Taotronics Car Back-up screen with the AMT630 chip has this problem. If I plug it in, it will display in black and white, if at all, and drop out erratically. Other game systems and video equipment display on it fine, just not the Genesis. The MST703 unit I have has no such problem, and will display the Genesis video signal properly. From what I've seen looking around on the net it seems like newer versions of the car backup screens use either a different chip or firmware setting, and a much smaller percentage of the screens work with the Genesis video signal now than those manufactured just a couple years ago. Some people think it could be because the Genesis does not output a standard NTSC number of lines. I think it could be either the chip used, the firmware settings or the panel itself. Since it seems like you know a bit about these I was wondering if I could get a second opinion or insight into this problem.