Switchable autostereoscopic display with a capacitive touch location sensor

Switchable autostereoscopic display comprising:

• an array of pixels lined with a view altering lens stack, wherein the view altering lens stack has a plurality of lens elements for directing the output from different pixels to different spatial positions to enable a stereoscopic image to be viewed;
• a switchable liquid crystal layer arranged between the array of pixels and the view altering lens stack, which liquid crystals of the switchable liquid crystal layer can be aligned between a first alignment and a second alignment by an electrical field, wherein light from the pixels can pass the lens stack uncleflected with the liquid crystals in the first alignment for a monoscopic image, while light from the pixels is deflected by the lens stack with the liquid crystals in the second alignment for a stereoscopic image;
• a main linear grid of elongate electrodes arranged parallel to and between the array of pixels and the switchable liquid crystal layer to provide an electrical field;
• characterized by
• a first sub-grid of electrodes arranged parallel to and between the array of pixels and the main linear grid of elongate electrodes, wherein the first sub-grid is spaced apart from the main linear grid;
• a second sub-grid of electrodes arranged parallel to and spaced apart from the first sub-grid and parallel to the main linear grid to provide a capacitive touch location sensor and wherein the elongate electrodes, each having a width g, of the main linear grid are arranged at a pitch p and wherein the ratio g/p is at least 0.75.