Active matrix pixel device construction method

A method of constructing an active matrix pixel device comprising:

• providing a universal active matrix comprising on a substrate a matrix array of switching elements whose spacing defines a base pitch and sets of row address conductors and column address conductors for addressing the switching elements;
• forming on the substrate a dielectric layer over the array of switching elements,
• forming an array of contact holes in the dielectric layer such that contact can be made with a plurality of switching elements,
• forming a pixel array on the universal active matrix, the pixel array comprising a matrix array of pixel electrodes in electrical contact with underlying switching elements via the contact holes, the spacing of the pixel electrodes defining a pixel pitch,
• wherein the pixel pitch is greater than the base pitch.