Patent ID: 8548289

Claim:
A system comprising: a light guide; a first conductor layer; a second conductor layer; a deformable membrane layer comprising a piezoelectric material, wherein at least a portion of the deformable membrane layer is positioned between the first conductor layer and the second conductor layer; the second conductor layer comprising optical microstructures, the second conductor layer being transparent at least proximate to an aperture of each optical microstructure through which light is coupled out of the light guide when the deformable membrane layer is deflected towards the light guide; and the system further comprising a third conductor layer positioned proximate the light guide, a gap existing between the second conductor layer and the third conductor layer, and the second conductor layer being positioned between the first conductor layer and the third conductor layer; the system being arranged such that an electrical potential difference applied between the second conductor layer and the third conductor layer causes the deformable membrane layer to deflect towards the light guide.