Patent ID: 9310632
Filing Date: 2016-04-12
CPC Classification: G02B,G02F,H04N

Claim Text:
1. A liquid crystal (LC) lens device, comprising: an LC lens array comprising a plurality of LC lenses in parallel, each LC lens comprising: a first substrate; a plurality of first electrodes disposed on a first surface of the first substrate; a second substrate; a plurality of second electrodes disposed on a second surface of the second substrate, the second surface opposite to the first surface; and an LC layer disposed between the first electrodes and the second electrodes to form a Fresnel lens; wherein the Fresnel lens comprises a main lobe region and a plurality of side lobe regions, the second electrodes are divided into four groups respectively defined as a first group, a second group, a third group and a fourth group, the second electrodes of the first group are disposed in the main lobe region, each of the second electrodes of the second group is disposed at edges of the Fresnel lens, each of the second electrodes of the third group is disposed at a junction of the main lobe region and one side lobe region, or a junction of two adjacent side lobe regions, and each of the second electrodes of the fourth group is disposed in one side lobe region; and a driving device electrically connected to the second electrodes of each LC lens, wherein the driving device provides driving voltages respectively to each of the second electrodes in an order starting from the second electrodes disposed at the edges of the Fresnel lens and ending at the second electrode disposed at the middle of the main lobe region, and there is a preset time difference between driven starting times of every adjacent two second electrodes, wherein the preset time difference is equal to a result of a response time of LC molecules in each LC lens multiplying a preset percentage.