# US 10,503,021 B2 · Substrate provided with alignment film 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 10,503,021 B2 - Document ID: US10503021B2 - Status: Granted - Kind: B2 - Application number: 16/249,121 - Filed: 2019-01-16 - Published: 2019-07-25 - Granted: 2019-12-10 - Earliest claimed: 2018-01-23 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: Masanobu Mizusaki; Tsuyoshi Okazaki; Yuko Teraoka - Web page: https://patentgrep.com/patent/US10503021B2 ## CPC - G02F 1/133711: {by organic films, e.g. polymeric films} - C08G 77/38: Polysiloxanes modified by chemical after-treatment - C09D 183/10: Block or graft copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C09D151/08, C09D153/00) - G02F 1/1337: Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers - G02F 1/133719: {with coupling agent molecules, e.g. silane} - G02F 1/133723: {Polyimide, polyamide-imide} - G02F 1/133788: {by light irradiation, e.g. linearly polarised light photo-polymerisation} - C08G 77/455: containing polyamide, polyesteramide or polyimide sequences - C09K 2323/02: Alignment layer characterised by chemical composition - C09K 2323/023: Organic silicon compound, e.g. organosilicon - C09K 2323/027: Polyimide - G02F 1/133757: {with different alignment orientations} - 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 - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A substrate provided with an alignment film includes: a substrate including an electrode on a surface thereof; and an alignment film in contact with the electrode. The alignment film contains a first polymer that contains a polysiloxane structure in a side chain and a second polymer that contains a photo-reactive group or a vertically aligning functional group. The alignment film includes a first surface that is placed on a side close to the electrode and contains the first polymer and a second surface that is placed on a side opposite to the first surface and contains the second polymer. The first polymer has a weight that is equal to or greater than a weight of the second polymer in the alignment film. ## Claims ### Claim 1 A substrate provided with an alignment film, comprising: a substrate including an electrode on a surface thereof; and an alignment film in contact with the electrode, for aligning liquid crystal molecules, the alignment film containing a first polymer that contains a polysiloxane structure in a side chain and a second polymer that contains a photo-reactive group or a vertically aligning functional group, the alignment film including a first surface that is placed on a side close to the electrode and contains the first polymer and a second surface that is placed on a side opposite to the first surface and contains the second polymer, the first polymer having a weight that is equal to or greater than a weight of the second polymer in the alignment film, wherein the first polymer contains a structure represented by the following formula (2) or a structure represented by the following formula (3): wherein X is a structure represented by any one of the following formulae (X-1) to (X-12); Y1 is a structure represented by any of the following formulae (Y1-1) to (Y1-16); Y2 is a structure represented by the following formula (Y2-1); W is a side chain; m1 and m2 are each a real number greater than 0 and smaller than 1; and p1 and p2 each represent the number of repeats, and are each an integer of 1 or greater, ### Claim 2 (depends on 1) The substrate provided with an alignment film according to claim 1, wherein the photo-reactive group contains a cinnamate group, a chalcone group, an azobenzene group, or a coumarin group. ### Claim 3 (depends on 1) The substrate provided with an alignment, film according to claim 1, wherein the vertically aligning functional group contains an alkyl group or a cholesterol group. ### Claim 4 (depends on 1) The substrate provided with an alignment film according to claim 1, wherein the first polymer contains a main chain that is derived from a polyamic acid or a polyimide. ### Claim 5 (depends on 1) The substrate provided with an alignment film according to claim 1, wherein the first polymer and the second polymer give a weight ratio of 1:1 to 9:1 in the alignment film. ### Claim 6 (depends on 1) The substrate provided with an alignment film according to claim 1, wherein m1 and m2 are each not smaller than 0.001 but smaller than 0.3 in the formulae (2) and (3). ### Claim 7 (depends on 1) A liquid crystal display device comprising, in the stated order: an array substrate including a pixel electrode; an alignment film in contact with the pixel electrode; a liquid crystal layer containing a liquid crystal molecule; and a counter substrate including a counter electrode, the array substrate and the alignment film constituting a stack, the stack being the substrate provided with an alignment film according to claim 1. ### Claim 8 (depends on 7) The liquid crystal display device according to claim 7, wherein the pixel electrode or the counter electrode is provided with a slit. ### Claim 9 (depends on 7) The liquid crystal display device according to claim 7, wherein the pixel electrode is in contact with the polysiloxane structure of the first polymer contained in the alignment film. ### Claim 10 (depends on 7) The liquid crystal display device according to claim 7, wherein the liquid crystal molecule has a pre-tilt angle of 87.5″ to 88.0°.