# US 11,079,632 B2 · Display device comprising a first alignment layer having reactive mesogens and a photoinitiator and a second alignment layer not having the photoinitiator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,632 B2 - Document ID: US11079632B2 - Status: Granted - Kind: B2 - Application number: 15/645,214 - Filed: 2017-07-10 - Published: 2017-10-26 - Granted: 2021-08-03 - Earliest claimed: 2014-02-26 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hyoungcheol Lee; Jang-Il Kim; Osung Seo; YeoGeon Yoon; SooJeong Huh - Web page: https://patentgrep.com/patent/US11079632B2 ## CPC - G02F 1/133773: {the alignment material or treatment being different for the two opposite substrates} - G02F 1/133633: {using mesogenic materials} - G02F 1/133711: {by organic films, e.g. polymeric films} - G02F 1/133726: {made of a mesogenic material} - G02F 1/133753: {with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle} - G02F 1/133305: {Flexible substrates, e.g. plastics, organic film} - G02F 1/133788: {by light irradiation, e.g. linearly polarised light photo-polymerisation} - 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 ## Abstract A curved display device includes a first substrate, a second substrate facing the first substrate, a liquid crystal layer disposed between the first and second substrates, the liquid crystal layer including liquid crystal molecules, a first alignment layer including reactive mesogens which are polymerized with each other, the first alignment layer being disposed between the first substrate and the liquid crystal layer, and a second alignment layer disposed between the liquid crystal layer and the second substrate, where the reactive mesogens have a functional group having charges. ## Claims ### Claim 1 A display device comprising: a first substrate; a second substrate facing the first substrate; a liquid crystal layer disposed between the first and second substrates, the liquid crystal layer comprising liquid crystal molecules; a first alignment layer disposed between the first substrate and the liquid crystal layer, the first alignment layer includes reactive mesogens which are polymerized with each other and a photoinitiator; and a second alignment layer disposed between the liquid crystal layer and the second substrate, wherein a material of the first alignment layer is different from a material of the second alignment layer, and wherein an entire composition of the second alignment layer does not include the photoinitiator. ### Claim 2 (depends on 1) The display device of claim 1, wherein the liquid crystal molecules comprises: first liquid crystal molecules which are adjacent to the first alignment layer and have a first pretilt-angle, and second liquid crystal molecules, which are adjacent to the second alignment layer and have a second pretilt-angle which is different from the first pretilt-angle, and wherein the first pretilt-angle is an angle defined by a first line provided in one surface of the first alignment layer and a long axis of the first liquid crystal molecules, and the second pretilt-angle is an angle defined by a second line provided in one surface of the second alignment layer and a long axis of the second liquid crystal molecules, and wherein the first and second pretilt-angles are equal to or less than 90°. ### Claim 3 (depends on 2) The display device of claim 2, wherein the first pretilt-angle is less than the second pretilt-angle. ### Claim 4 (depends on 2) The display device of claim 2, wherein the first pretilt-angle is 80° to 90°. ### Claim 5 (depends on 2) The display device of claim 2, wherein the second pretilt-angle is 88° to 90°. ### Claim 6 (depends on 1) The display device of claim 1, wherein the reactive mesogens have a functional group having charges. ### Claim 7 (depends on 1) The display device of claim 1, wherein the first alignment layer comprises a first base layer disposed on the first substrate and a first alignment formation layer disposed on the first base layer, and wherein the first base layer includes the photoinitiator and the first alignment formation layer includes the reactive mesogens. ### Claim 8 A curved display device comprising: a first bent substrate; a second bent substrate facing the first bent substrate; a liquid crystal layer disposed between the first and second bent substrates, the liquid crystal layer comprising liquid crystal molecules; a first alignment layer disposed between the first bent substrate and the liquid crystal layer, the first alignment layer includes a photoinitiator and reactive mesogens which are polymerized with each other; and a second alignment layer disposed between the liquid crystal layer and the second bent substrate, wherein an entire composition of the second alignment layer does not include the photoinitiator. ### Claim 9 (depends on 8) The curved display device of claim 8, wherein the liquid crystal molecules comprises: first liquid crystal molecules which are adjacent to the first alignment layer and have a first pretilt-angle, and second liquid crystal molecules, which are adjacent to the second alignment layer and have a second pretilt-angle which is different from the first pretilt-angle, and wherein the first pretilt-angle is an angle defined by a first line provided in one surface of the first alignment layer and a long axis of the first liquid crystal molecules, and the second pretilt-angle is an angle defined by a second line provided in one surface of the second alignment layer and a long axis of the second liquid crystal molecules. ### Claim 10 (depends on 9) The curved display device of claim 9, wherein the first pretilt-angle is less than the second pretilt-angle. ### Claim 11 (depends on 8) The curved display device of claim 8, wherein the first alignment layer comprises a first base layer disposed on the first bent substrate and a first alignment formation layer disposed on the first base layer, and wherein the first base layer includes the photoinitiator and the first alignment formation layer includes the reactive mesogens. ### Claim 12 (depends on 8) The curved display device of claim 8, wherein the reactive mesogens have a functional group having charges. ### Claim 13 (depends on 8) The curved display device of claim 8, wherein the first bent substrate has a first curvature radius, and the second bent substrate has a second curvature radius different from the first curvature radius. ### Claim 14 (depends on 13) The curved display device of claim 13, wherein the first curvature radius is greater than or equal to the second curvature radius.