i have this same TV

first use the HDMI of the rear of the TV, not the one from the side, only with the rear HDMI connector can you reach the native resolution of the TV, and deactivate the autodetection of the TV from the PS3 menu.

contrast 100
brightness 45

colour tone Normal

Black Adjust Medium
Dynamic Contrast Off
Edge enhancment On
Colour Space Large

Pc Home CInema ON

and select resolution of 1360x768 from the PS3 menu (this resolution only appera when you use the HDMI from the rear and you deactivate the autodetection mode in the PS3.