LG VX-8100

I took some pictures with my 8100. I set them as my display pictures inside and outside. What I've noticed is that they are really light and somewhat hard to see. If I tilt the phone up or down the picture gets darker therefore easier to see. I thought maybe it was just the pictures, but I sent one of the pictures to a 6100, and when they opened the picture it was dark and clear and much better looking than it was on my phone. Anyone have experience with this or have any suggestions to fix it? Any help would be much appreciated.