Touch sensor panel with hidden graphic mode

A capacitive touch sensor panel comprising:

• a generally planar substrate having a user-contacting first surface and an opposite second surface;
• graphics layer having alpha-numeric characters, icons or other graphic devices behind said second surface of said substrate defining user readable graphic symbols;
• a flexible substrate adjacent said graphics layer and including a plurality of electrically conductive sensing pads juxtaposed with said graphic symbols;
• a plurality of light sources behind said flexible substrate, each of said light sources being juxtaposed with one of said electrically conductive sensing pads and being selectively actuatable;
• and
• said planar substrate having optical transmission characteristics at selected light frequencies in order to project images of said alpha-numeric characters, icons or other graphic devices juxtaposed with actuated ones of said light sources and to impart a homogeneous appearance to portions of said substrate overlying nonactuated ones of said light sources.