waveform issues.. help?

So... after lots of searching. I think the problem with my kindle (3g) is a waveform. Basically images are all 'faded' and don't show up well. When it flashes to a new screen, the image looks perfect, but when the screen is static it looses some those blacks and the images looks bad..

I haven't replaced the screen or anything. It just happened... Not sure why.

Any fix?