# US 2021/0278728 A1 · Phase difference film, method for manufacturing phase difference film, polarizing plate, and liquid crystal display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0278728 A1 - Document ID: US20210278728A1 - Status: Published application - Kind: A1 - Application number: 17/177,541 - Filed: 2021-02-17 - Published: 2021-09-09 - Earliest claimed: 2018-08-30 - Assignees: FUJIFILM Corporation - Applicants: FUJIFILM Corporation - Inventors: Chie MORIYA - Web page: https://patentgrep.com/patent/US20210278728A1 ## CPC - C09K 19/3852: {Poly(meth)acrylate derivatives} - G02F 1/133742: {for homeotropic alignment} - C09K 19/3491: {having sulfur as hetero atom} - C09K 19/404: {containing boron or phosphorus} - C09K 19/52: characterised by components which are not liquid crystals, e.g. additives {with special physical aspect: solvents, solid particles} - G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00) - G02F 1/133531: {characterised by the arrangement of polariser or analyser axes} - G02F 1/133711: {by organic films, e.g. polymeric films} - G02F 1/13731: {based on a field-induced phase transition (G02F1/13781 takes precedence)} - C09K 2019/0448: {the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate} - C09K 2019/528: {Surfactants} - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An object of the present invention is to provide a phase difference film having excellent alignment without the need for alignment treatment on a support, a method for manufacturing a phase difference film, a polarizing plate, and a liquid crystal display device. The phase difference film of the present invention includes a support, and a liquid crystal layer formed of a liquid crystal composition containing a liquid crystalline compound so as to be in contact with the support, in which a surface energy of a surface of the support on which the liquid crystal layer is formed is 45 mN/m or more and a non-polar dispersion force component included in the surface energy is 45 mN/m or more, the liquid crystalline compound is immobilized in an aligned state, and a contrast is more than 10000. ## Claims ### Claim 1 A phase difference film comprising: a support; and a liquid crystal layer formed of a liquid crystal composition containing a liquid crystalline compound so as to be in contact with the support, wherein a surface energy of a surface of the support on which the liquid crystal layer is formed is 45 mN/m or more and a non-polar dispersion force component included in the surface energy is 45 mN/m or more, the liquid crystalline compound is immobilized in an aligned state, and a contrast is more than 10000. ### Claim 2 (depends on 1) The phase difference film according to claim 1, wherein a material constituting the support is polycarbonate. ### Claim 3 (depends on 1) The phase difference film according to claim 1, wherein the liquid crystal layer exhibits smectic properties. ### Claim 4 (depends on 1) The phase difference film according to claim 1, wherein the liquid crystal composition further contains a boronic acid monomer having a polymerizable group and a boronic acid group represented by Formula (B), in Formula (B), R1 and R2 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, an aryl group, or a heterocyclic group, R1 and R2 may be linked to each other to form a ring, and * represents a bonding position. ### Claim 5 (depends on 1) A method for manufacturing the phase difference film according to claim 1, the method comprising: a step of applying a liquid crystal composition including a liquid crystalline compound and a solvent to a surface of a support to form a liquid crystal layer so as to be in contact with the support, wherein the solvent contains a solvent A which does not dissolve the support and a solvent B which has a lower boiling point than the solvent A and dissolves the support, and both contents of the solvent A and the solvent B are 10% by mass or more with respect to a total mass of the liquid crystal composition. ### Claim 6 (depends on 1) A polarizing plate comprising: the phase difference film according to claim 1; and a polarizer. ### Claim 7 (depends on 6) The polarizing plate according to claim 6, wherein the polarizer, the liquid crystal layer included in the phase difference film, and the support included in the phase difference film are arranged in this order. ### Claim 8 (depends on 6) The polarizing plate according to claim 6, wherein a slow axis of the support is parallel to an absorption axis of the polarizer, the support has 100 to 180 nm of Re1 and 50 to 90 nm of Rth1, the liquid crystal layer has −10 to 10 nm of Re2 and −150 to −80 nm of Rth2, and the support and the liquid crystal layer have a reciprocal wavelength dispersibility, where, Re1 means an in-plane retardation (nm) of the support at a wavelength of 550 nm, Rth1 means a thickness-direction retardation (nm) of the support at a wavelength of 550 nm, Re1 means an in-plane retardation (nm) of the liquid crystal layer at a wavelength of 550 nm, and Rth2 means a thickness-direction retardation (nm) of the liquid crystal layer at a wavelength of 550 nm. ### Claim 9 (depends on 6) A liquid crystal display device comprising: the polarizing plate according to claim 6; and a transverse electric field type liquid crystal cell, wherein, from a viewing side, the polarizer included in the polarizing plate, the liquid crystal layer included in the polarizing plate, the support included in the polarizing plate, and the liquid crystal ceil are arranged in this order. ### Claim 10 (depends on 2) The phase difference film according to claim 2, wherein the liquid crystal layer exhibits smectic properties. ### Claim 11 (depends on 2) The phase difference film according to claim 2, wherein the liquid crystal composition further contains a boronic acid monomer having a polymerizable group and a boronic acid group represented by Formula (B), iii Formula (B), R1 and R2 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, an aryl group, or a heterocyclic group, R1 and R2 may be linked to each other to form a ring, and * represents a bonding position. ### Claim 12 (depends on 2) A method for manufacturing the phase difference film according to claim 2, the method comprising: a step of applying a liquid crystal composition including a liquid crystalline compound and a solvent to a surface of a support to form a liquid crystal layer so as to be in contact with the support, wherein the solvent contains a solvent A which does not dissolve the support and a solvent B which has a lower boiling point than the solvent A and dissolves the support, and both contents of the solvent A and the solvent B are 10% by mass or more with respect to a total mass of the liquid crystal composition. ### Claim 13 (depends on 2) A polarizing plate comprising: the phase difference film according to claim 2; and a polarizer. ### Claim 14 (depends on 13) The polarizing plate according to claim 13, wherein the polarizer, the liquid crystal layer included in the phase difference film, and the support included in the phase difference film are arranged in this order. ### Claim 15 (depends on 13) The polarizing plate according to claim 13, wherein a stow axis of the support is parallel to an absorption axis of the polarizer, the support has 100 to 180 mu of Re1 and 50 to 90 nm of Rth1, the liquid crystal layer has −10 to 10 nm of Re2 and −150 to −80 nm of Rth2, and the support and the liquid crystal layer have a reciprocal wavelength dispersibility, where, Re1 means an in-plane retardation (nm) of the support at a wavelength of 550 nm, Rth1 means a thickness-direction retardation (nm) of the support at a wavelength of 550 nm, Re2 means an in-plane retardation (ran) of the liquid crystal layer at a wavelength of 550 nm, and Rth2 means a thickness-direction retardation (nm) of the liquid crystal layer at a wavelength of 550 nm. ### Claim 16 (depends on 13) A liquid crystal display device comprising: the polarizing plate according to claim 13; and a transverse electric field type liquid crystal cell, wherein, from a viewing side, the polarizer included in the polarizing plate, the liquid crystal layer included in the polarizing plate, the support included in the polarizing plate, and the liquid crystal cell are arranged in this order. ### Claim 17 (depends on 3) The phase difference film according to claim 3, wherein the liquid crystal composition further contains a boronic acid monomer having a polymerizable group and a boronic acid group represented by Formula (B), in Formula (B), R1 and R2 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, an aryl group, or a heterocyclic group, R1 and R2 may be linked to each other to form a ring, and * represents a bonding position. ### Claim 18 (depends on 3) A method for manufacturing the phase difference film according to claim 3, the method comprising: a step of applying a liquid crystal composition including a liquid crystalline compound and a solvent to a surface of a support to form a liquid crystal layer so as to be in contact with the support, wherein the solvent contains a solvent A which does not dissolve the support and a solvent B which has a lower boiling point than the solvent A and dissolves the support, and both contents of the solvent A and the solvent B are 10% by mass or more with respect to a total mass of the liquid crystal composition. ### Claim 19 (depends on 3) A polarizing plate comprising: the phase difference film according to claim 3; and a polarizer. ### Claim 20 (depends on 19) The polarizing plate according to claim 19, wherein the polarizer, the liquid crystal layer included in the phase difference film, and the support included in the phase difference film are arranged in this order.