公开(公告)号：US20230116775A1

公开(公告)日：2023-04-13

申请号：US17736792

申请日：2022-05-04

申请人： META PLATFORMS TECHNOLOGIES, LLC

发明人： Hao MEI ,  Sheng YE ,  Christopher Yuan Ting LIAO ,  Jonathan Robert PETERSON ,  Rongzhi HUANG ,  Arman BOROMAND ,  Andrew John OUDERKIRK ,  Taha MASOOD

IPC分类号： C08J5/18 ,  B29C71/00 ,  B29C43/24 ,  B29C48/08 ,  B29C48/00 ,  B29C55/00

摘要： A mechanically and piezoelectrically anisotropic polymer thin film may be formed by gel casting a solution that includes a crystallizable polymer and a liquid solvent. The solvent may be configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the cast thin film. The thin film may also include up to approximately 90 wt. % of an additive and may be characterized by a bimodal molecular weight distribution of a crystallizable polymer where the molecular weight of the additive may be less than the molecular weight of the crystallizable polymer. In some examples, the polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc. The anisotropic polymer thin film may be characterized by an electromechanical coupling factor (k31) of at least 0.1.

公开(公告)号：US20230053120A1

公开(公告)日：2023-02-16

申请号：US17885454

申请日：2022-08-10

申请人： Meta Platforms Technologies, LLC

发明人： Afsoon JAMALI ,  Jasmine Soria SEARS ,  Sho NAKAHARA ,  Kurt JENKINS ,  Abbas Mehdi KAZMI ,  Sandro PINTZ ,  Arman BOROMAND

IPC分类号： G02F1/157 ,  G02B27/01

摘要： A headset for augmented reality applications is provided. The headset includes at least one eyepiece configured to provide a see-through image to a user via a transparent optical component, and to provide an artificial image through a display, and a dimming shutter configured to adjust a transparency level of the transparent optical component. The dimming shutter further includes an active liquid crystal layer configured to adjust a transparency level according to an electrical power provided between two electrodes, and a photoactive layer configured to adjust the transparency level upon absorption of an ultraviolet radiation for a selected period of time. A default orientation of a host material in the active liquid crystal layer may be in a dark state or in a clear state, when no electrical power is provided. A method and a memory storing instructions to execute the method for use of the above device are also provided.