I recently bought a DynamixCorp 7" Touchscreen LCD, which works pretty good, except that it is absolutely impossible to view the screen when there is light shining in from the back window.
Link to Item
It is listed as:
Brightness Rating 400cd/mē
Contrast Radio 150
I noticed that most people are using Xenarc or Liliput screens. I am not sure what the contrast ratios are for the Liliput and Xenarc, but from

, it seems like they are around 200 to 250.
Will this make a big difference? The screen is virtually black with light coming in from the back window. I may change the screen if it makes the screen more readable during daylight (btw, its great at night).
Edit: Anybody?