There is provided a pair of transparent upper and lower glass substrates which are disposed apart from each other so as to form a space there-between, a pair of electrodes provided on the underside of the upper substrate and on the upper surface of the lower substrate. A plurality of circular holes are...http://www.google.es/patents/US6768536?utm_source=gb-gplus-sharePatente US6768536 - Liquid crystal microlens
