# US 2021/0276313 A1 · Multiple and single layers liquid crystal dispersion devices for common and direct glazing applications and methods thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0276313 A1 - Document ID: US20210276313A1 - Status: Published application - Kind: A1 - Application number: 17/328,208 - Filed: 2021-05-24 - Published: 2021-09-09 - Earliest claimed: 2015-06-30 - Assignees: Gauzy Ltd. - Applicants: Gauzy Ltd - Inventors: Hassan-Ali HAKEMI; Adrian LOFER; Eyal PESO; Dana GAL-FUSS - Web page: https://patentgrep.com/patent/US20210276313A1 ## CPC - B32B 27/08: of synthetic resin - B32B 7/06: permitting easy separation - B32B 17/10: of synthetic resin - B32B 17/10899: {by introducing interlayers of synthetic resin} - B32B 27/36: comprising polyesters - B32B 37/15: with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state - B32B 37/203: {One or more of the layers being plastic} - B32B 37/206: {Laminating a continuous layer between two continuous plastic layers} - B32B 38/0008: {Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation (heat treatment B32B38/0036)} - B32B 38/0036: {Heat treatment (for heating or cooling of layers during lamination B32B37/06, B32B37/08)} - B32B 38/10: Removing layers, or parts of layers, mechanically or chemically - C09K 19/544: {as dispersing or encapsulating medium around the liquid crystal} - B32B 2037/268: {Release layers} - B32B 2038/0076: {Curing, vulcanising, cross-linking} - B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer - B32B 2255/205: Metallic coating - B32B 2255/26: Polymeric coating - B32B 2305/55: Liquid crystals - B32B 2305/72: Cured, e.g. vulcanised, cross-linked - B32B 2307/412: Transparent - B32B 2307/748: Releasability - B32B 2310/0831: using UV radiation - B32B 2310/0887: using electron radiation, e.g. beta-rays - B32B 2367/00: Polyesters, e.g. PET, i.e. polyethylene terephthalate - B32B 2457/00: Electrical equipment - B32B 2457/202: LCD, i.e. liquid crystal displays - B32B 2605/006: Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings - C09K 2019/546: {creating a polymeric network} - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract The present invention discloses means and methods for manufacturing a multilayer of liquid crystal dispersion film using releasable supporting films and means and methods for manufacturing a haze-free and low-cost multi liquid crystal-layer PDLC, LCDP, PSLC or polymer network using reliable supporting films. ## Claims ### Claim 1 A roll-to-roll method for manufacturing a liquid crystal dispersion in a polymer matrix film, comprising: placing a first support film (10) on a first roll; placing a release film (11) on a second roll disposed facing said first roll; pouring a first liquid crystal formulation (12) between said first support film and said release film; rolling said first roll and said second roll so as to entrain said first liquid crystal formulation between said first support film and said release film; curing said first liquid crystal formulation, thereby obtaining an initial PDLC film (14); wherein said method comprises: placing said initial PDLC film on a third roll; detaching said release film from said initial PDLC film while said initial PDLC film is on said third roll; placing a second support film on a fourth roll disposed facing said third roll; pouring a second liquid crystal formulation (16) between said initial PDLC film and said second support film subsequent to said step of removing said release film from said initial PDLC film; rolling said third roll and said fourth roll so as to entrain said second liquid crystal formulation between said initial PDLC film and said second support film; and, curing said second liquid crystal formulation, thereby obtaining a PDLC film comprising two liquid crystal layers disposed between said two support films. ### Claim 2 (depends on 1) The method according to claim 1, wherein said step of curing comprises curing by at least one method selected from the group consisting of irradiating with UV light; irradiating by an electron beam; and heating. ### Claim 3 (depends on 1) The method according to claim 1, wherein said first support film is releasable and said method comprises: detaching said first support film and said release film subsequent to said step of curing said first liquid crystal formulation; providing two metallized coated glasses; and, enclosing said initial PDLC film between said two metallized coated glasses. ### Claim 4 (depends on 1) The method according to claim 1, wherein said first support film and said second support film are releasable and said method comprises: detaching said first support film and said second support film subsequent to said step of curing said second liquid crystal formulation; providing two metallized coated glasses; and, enclosing said final PDLC film between said two metallized coated glasses. ### Claim 5 (depends on 1) The method according to claim 1, wherein said second support film is releasable and said method comprises: detaching said second support film; performing a procedure for adding a liquid crystal layer to said PDLC film, said procedure comprising: placing said PDLC film on a PDLC film roll; placing an additional support film on a support film roll; pouring an additional liquid crystal formulation between said PDLC film and said additional support film; rolling said PDLC film roll and said support film roll so as to entrain said additional liquid crystal formulation between said PDLC film and said additional support film; and, curing said additional liquid crystal formulation, thereby obtaining a PDLC film comprising two liquid crystal layers disposed between two support films; and, if an additional liquid crystal layer is desired: detaching said additional support film; and, repeating said procedure for adding a liquid crystal layer to said PDLC film until a PDLC film comprising a predetermined number of liquid crystal layers has been obtained. ### Claim 6 (depends on 5) The method according to claim 5, wherein said step of detaching said support film is performed while said PDLC film is on said roll. ### Claim 7 (depends on 5) The method according to claim 5, wherein said step of curing said additional liquid crystal formulation comprises curing by at least one method selected from the group consisting of irradiating with UV light; irradiating by an electron beam; and heating. ### Claim 8 (depends on 1) The method according to claim 1, wherein at least one of said liquid crystal formulations comprises dichroic organic and metal-organic dye. ### Claim 9 (depends on 1) The method according to claim 1, wherein at least one of said liquid crystal formulations comprises a nematic mixture. ### Claim 10 (depends on 1) The method according to claim 1, wherein at least one of said liquid crystal formulations comprises broad-band cholesteric materials. ### Claim 11 (depends on 1) The method according to claim 1, wherein at least one of said liquid crystal formulations comprises metal-organic mesogens. ### Claim 12 (depends on 1) The method according to claim 1, wherein said method comprises providing a dimmer and switch adapted for driving a capacitive or complex capacitive-resistive load. ### Claim 13 (depends on 1) The method according to claim 1, wherein at least one film selected from the group consisting of said release film and said support films is a PET release film. ### Claim 14 (depends on 1) The method according to claim 1, wherein at least one of said support films is a PET-ITO film. ### Claim 15 (depends on 1) The method according to claim 1, wherein at least one of said steps of curing comprises partially curing said liquid crystal formulation in order to achieve a semi-rigid layer of liquid crystal. ### Claim 16 (depends on 1) The method according to claim 1, wherein said liquid crystal formulation comprises a prepolymer comprising a cross-linkable elastomer.