Patent ID: 9547111
Date: 2017-01-17
CPC Classifications: G02B,G02F

Claim:
1. A manufacturing method of a polarized light modulation device, comprising: providing oppositely disposed a first transparent electrode substrate and a second transparent electrode substrate; filling polymerizable monomers and cholesteric liquid crystals between the first transparent electrode substrate and the second transparent electrode substrate; adding a photoinitiator or a photosensitizer between the first transparent electrode substrate and the second transparent electrode substrate; applying different operating voltages between the first transparent electrode substrate and the second transparent electrode substrate by at least two times to change a helical pitch of the cholesteric liquid crystals, performing light irradiation passing through the first transparent electrode substrate or the second transparent electrode substrate on the polymerizable monomers in a corresponding one of different domains after each time of applying one of the different operating voltages to solidify the changed helical pitch of the cholesteric liquid crystals, and making solidified helical pitches of the cholesteric liquid crystals in the different domains to be different from each other; applying a recovery voltage between the first transparent electrode substrate and the second transparent electrode substrate to retrieve an optical rotatory property of the cholesteric liquid crystals back to the state of solidifying; wherein when performing the light irradiation passing through the first transparent electrode substrate or the second transparent electrode substrate on the polymerizable monomers in the corresponding one of the different domains after each time of applying one of the different operating voltages, the other of the different domains without the need of light irradiation is shielded from the light irradiation; wherein the operating voltages are direct current voltages and the recovery voltage is an alternating current voltage; or, the operating voltages are alternating current voltages and the recovery voltage is an alternating current voltage having a frequency higher than a frequency of each of the operating voltages.