# US 10,503,017 B2 · Liquid crystal display and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,503,017 B2 - Document ID: US10503017B2 - Status: Granted - Kind: B2 - Application number: 15/499,091 - Filed: 2017-04-27 - Published: 2017-11-16 - Granted: 2019-12-10 - Earliest claimed: 2016-05-10 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Jae Bum Cho; Hyeok Jin Lee; Oh Jeong Kwon; Ka Eun Kim; Su Jin Kim - Web page: https://patentgrep.com/patent/US10503017B2 ## CPC - G02F 1/133707: {Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes} - C09K 19/56: Aligning agents - G02F 1/133711: {by organic films, e.g. polymeric films} - G02F 1/133788: {by light irradiation, e.g. linearly polarised light photo-polymerisation} - C09K 2019/0448: {the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate} - C09K 2323/02: Alignment layer characterised by chemical composition - G02F 1/133726: {made of a mesogenic material} - G02F 2201/56: Substrates having a particular shape, e.g. non-rectangular - G02F 2202/022: polymeric - G02F 2202/023: curable - 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 - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A liquid crystal display including: a first substrate; a second substrate configured to overlap the first substrate and to be separate from the first substrate; a liquid crystal layer disposed between the first substrate and the second substrate and including a liquid crystal molecule; a first alignment layer disposed between the first substrate and the liquid crystal layer; a second alignment layer disposed between the second substrate and the liquid crystal layer; and a plurality of protrusions disposed between the first alignment layer and the liquid crystal layer, wherein at least one protrusion of the plurality of protrusions includes an orientation polymer including a polymerized reactive mesogen, the first alignment layer includes a photo-reactive group, and the liquid crystal layer includes a photoreaction initiator. ## Claims ### Claim 1 A liquid crystal display comprising: a first substrate; a second substrate configured to overlap the first substrate and to be separate from the first substrate; a liquid crystal layer disposed between the first substrate and the second substrate, and comprising a liquid crystal molecule; a first alignment layer disposed between the first substrate and the liquid crystal layer; a second alignment layer disposed between the second substrate and the liquid crystal layer; and a plurality of protrusions disposed between the first alignment layer and the liquid crystal layer, wherein at least one protrusion of the plurality of protrusions comprises an orientation polymer comprising a polymerized reactive mesogen, wherein the first alignment layer comprises an alignment polymer comprising a main chain, and a photo-reactive group connected as a side chain to the main chain, wherein the orientation polymer and the alignment polymer are different polymers, wherein the photo-reactive group comprises a structure of at least one compound represented by the following Chemical Formulas 3 to 15: wherein the liquid crystal layer comprises a photoreaction initiator comprising at least one compound represented by the Chemical Formulas 3 to 15, and wherein a liquid crystal molecule adjacent to the first alignment layer has a pretilt angle greater than a liquid crystal molecule adjacent to the second alignment layer. ### Claim 2 (depends on 1) The liquid crystal display of claim 1, wherein the liquid crystal display is a curved liquid crystal display. ### Claim 3 (depends on 1) The liquid crystal display of claim 1, wherein a protrusion is not present between the second alignment layer and the liquid crystal layer. ### Claim 4 (depends on 1) The liquid crystal display of claim 1, further comprising a plurality of protrusions disposed between the second alignment layer and the liquid crystal layer, wherein a number of the plurality of protrusions disposed between the second alignment layer and the liquid crystal layer is about 5% or less of a number of the plurality of protrusions disposed between the first alignment layer and the liquid crystal layer. ### Claim 5 (depends on 1) The liquid crystal display of claim 1, wherein an amount of the photoreaction initiator in the liquid crystal layer is about 1 weight percent or less with respect to a total weight of the liquid crystal layer. ### Claim 6 (depends on 1) The liquid crystal display of claim 1, wherein the second alignment layer does not comprise a photo-reactive group. ### Claim 7 (depends on 1) The liquid crystal display of claim 1, wherein the reactive mesogen is a compound having three or more ring structures. ### Claim 8 (depends on 7) The liquid crystal display of claim 7, wherein the reactive mesogen comprises an acrylate group or methacrylate group at an end thereof. ### Claim 9 (depends on 7) The liquid crystal display of claim 7, wherein the reactive mesogen comprises a compound represented by the following Chemical Formula 1 or Chemical Formula 2: [Chemical Formula 1] ### Claim 10 A method of manufacturing a liquid crystal display, the method comprising: providing a first display panel comprising a first alignment layer comprising an alignment polymer and a reactive mesogen, wherein the alignment polymer comprises a main chain and a photo-reactive group connected as a side chain to the main chain; providing a second display panel comprising a second alignment layer; forming a liquid crystal layer comprising a liquid crystal molecule and a photoreaction initiator between the first display panel and the second display panel; eluting the reactive mesogen from the first alignment layer into the liquid crystal layer by applying heat; and irradiating ultraviolet light onto the first display panel, the second display panel, and the liquid crystal layer, wherein in the irradiating of the ultraviolet light, a plurality of protrusions comprising an orientation polymer comprising a polymerized reactive mesogen, are formed between the first alignment layer and the liquid crystal layer, wherein the orientation polymer and the alignment polymer are different polymers, wherein the photo-reactive group comprises a structure of at least one compound represented by the following Chemical Formulas 3 to 15: wherein the photoreaction initiator comprises at least one compound represented by the Chemical Formulas 3 to 15, and wherein a liquid crystal molecule adjacent to the first alignment layer has a pretilt angle greater than a liquid crystal molecule adjacent to the second alignment layer. ### Claim 11 (depends on 10) The method of claim 10, wherein the reactive mesogen in the first alignment layer is in the form of a mixture. ### Claim 12 (depends on 10) The method of claim 10, wherein the reactive mesogen is a compound having three or more ring structures. ### Claim 13 (depends on 12) The method of claim 12, wherein the reactive mesogen includes a compound represented by the following Chemical Formula 1 or Chemical Formula 2: ### Claim 14 (depends on 10) The method of claim 10, wherein a plurality of protrusions are formed between the second alignment layer and the liquid crystal layer in the irradiating of the ultraviolet light, and a number of the plurality of protrusions disposed between the second alignment layer and the liquid crystal layer is about 5% or less of a number of the plurality of protrusions disposed between the first alignment layer and the liquid crystal layer.