Importing from photoshop, Images lose definition.

Hi Guys,

I'm importing some psd's from photoshop for use in Unity iOS pro, When I save the psd's as jpg's and view them on my iPad they look exactly the same as they do when they're on my computer screen, however when I view the Unity file on the iPad the image loses a great deal of definition and it appears that the brightness and contrast have been altered too. I would say detail loss is about 25% which is far too much for the brief I have

Is there a definitive way to import psd's into Unity, a setting I need to adjust or is this simply a limitation of the software?

Please help!

Thanks in advance

S