Patent ID: 9704686
Date: 2017-07-11
CPC Classifications: G02B,G02F,H01J

Claim:
1. An electric alignment device for a birefringence grating of a birefringence grating display device, wherein the birefringence grating display device comprises the birefringence grating, a switching device, and a display unit, wherein the birefringence grating comprises a concave grating and a substrate opposed to each other, and liquid crystal polymer filled between the concave grating and the substrate; and wherein the electric alignment device is configured to align the birefringence grating and comprises: an alignment platform provided with at least two stripe electrodes, the at least two stripe electrodes are arranged parallel to each other so as to generate an electric field for aligning the liquid crystal polymer in the birefringence grating, and the at least two stripe electrodes are embedded into the alignment platform to provide a flat surface on the alignment platform; and wherein lower surfaces of ridges of the concave gratings in the birefringence grating are arranged in direct contact with the at least two stripe electrodes of the electric alignment device.