Patent ID: 9575366
Date: 2017-02-21
CPC Classifications: G02F

Claim:
1. A liquid crystal cell structure, comprising: two polarizers; a liquid crystal diffractive light modulating cell placed between the two polarizers, the cell comprising: a voltage source, configured to apply the driving voltage greater than the critical voltage for helix unwinding, which generates an electric field of approximately 6.5 V/μm or less across the ferroelectric liquid crystal layer; wherein the two transparent substrates treated by photoalignment are configured to provide multiple alignment domains in the ferroelectric liquid crystals with a planar surface orientation; wherein adjacent domains of the multiple alignment domains are oriented at an angle with respect to each other, providing a grating structure; and wherein the liquid crystal cell structure is configured to be switched, with a response time of approximately 10 μs or less, between a saturated bright state corresponding to a maximum transmittance and a saturated dark state corresponding to a minimum transmittance based on the application of the driving voltage greater than the critical voltage for helix unwinding by the voltage source, wherein the liquid crystal cell structure is configured to display diffraction patterns while the liquid crystal diffractive light modulating cell is in the saturated bright state, and configured such that no diffraction patterns are displayed while the liquid crystal diffractive light modulating cell is in the saturated dark state.