# US 8,542,336 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 8,542,336 B2 - Document ID: US8542336B2 - Status: Granted - Kind: B2 - Application number: 12/722,601 - Filed: 2010-03-12 - Published: 2011-06-02 - Granted: 2013-09-24 - Earliest claimed: 2009-11-27 - Assignees: Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University) - Applicants: Jae-Hoon Kim - Inventors: Jae-Hoon Kim - Web page: https://patentgrep.com/patent/US8542336B2 ## CPC - G02F 1/133719: {with coupling agent molecules, e.g. silane} - G02F 1/133742: {for homeotropic alignment} - G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]} - 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 liquid crystal display includes: a first panel; a second panel facing the first panel; a first electrode and a second electrode formed on the first panel; a liquid crystal layer provided between the first panel and the second panel; and a first alignment layer formed on the first panel and contacting the liquid crystal layer. The first alignment layer includes a first alignment base layer and a first alignment control agent, the first alignment base layer represents a material for vertically aligning liquid crystal of the liquid crystal layer, and the first alignment control agent comes out of the first alignment base layer and provides alignment force to the liquid crystal. Accordingly, when the liquid crystal of the IPS mode liquid crystal display has a pretilt, the liquid crystal that is near the facing panel on which a linear common electrode and a linear pixel electrode are not provided is immediately tilted according to the pretilt, and hence, the response speed is very fast and the afterimage problem of video is solved. ## Claims ### Claim 1 A liquid crystal display comprising: a first panel; a second panel facing the first panel; a first electrode and a second electrode formed on the first panel; a liquid crystal layer provided between the first panel and the second panel; and a first alignment layer formed on the first panel and contacting the liquid crystal layer, wherein the first alignment layer includes a first alignment base layer and a plurality of first alignment control agents, the first alignment base layer aligning liquid crystals of the liquid crystal layer in a vertical direction with respect to a surface of the first panel, and the first alignment control agents come out of the first alignment base layer and provide alignment force to the liquid crystals to be pre-tilted in a different direction from the vertical direction wherein a region between the first electrode and the second electrode is divided into a plurality of domains including first domains, second domains, third domains and fourth domains which are classified according to directors of the liquid crystals included therein, wherein the plurality of domains are divided into a first region and a second region respectively including at least one of the first domains, at least one of the second domains, at least one of the third domains, and at least one of the fourth domains, and wherein absolute value of a polar angle of each of the first alignment control agents provided in the first region is greater than absolute value of a polar angle of each of the first alignment control agents provided in the second region, where the polar angle is defined as an angle formed between the first alignment control agent and the surface of the first panel. ### Claim 2 (depends on 1) The liquid crystal display of claim 1, wherein the first electrode and the second electrode are formed as a plurality of bands, and are alternately disposed. ### Claim 3 (depends on 1) The liquid crystal display of claim 1, wherein the first electrode and the second electrode are in parallel with each other, and the middle parts thereof are bent. ### Claim 4 (depends on 1) The liquid crystal display of claim 1, wherein the first alignment control agent is generated by polymerizing a photo-polymerizable monomer or oligomer. ### Claim 5 (depends on 1) The liquid crystal display of claim 1, wherein the liquid crystal display further includes a second alignment layer formed on the second panel and contacting the liquid crystal layer, and the second alignment layer includes a second alignment base layer and a second alignment control agent, the second alignment base layer represents a material for vertically aligning liquid crystal of the liquid crystal layer, and the second alignment control agent comes out of the second alignment base layer and provides alignment force to the liquid crystal. ### Claim 6 (depends on 5) The liquid crystal display of claim 5, wherein the second alignment control agent is generated by polymerizing a photo-polymerizable monomer or oligomer. ### Claim 7 (depends on 6) The liquid crystal display of claim 6, wherein a polar angle of the second alignment control agent provided in the first region is different from a polar angle of the second alignment control agent provided in the second region. ### Claim 8 (depends on 7) The liquid crystal display of claim 7, wherein the first alignment layer and the second alignment layer are optical alignment layers. ### Claim 9 (depends on 1) The liquid crystal display of claim 1, wherein the first electrode is formed as a plurality of bands, and the second electrode is formed with a continuous surface in a pixel area. ### Claim 10 (depends on 9) The liquid crystal display of claim 9, wherein the second electrode is formed with a transparent conductor. ### Claim 11 (depends on 10) The liquid crystal display of claim 10, wherein a region between the first electrode and the second electrode is divided into a plurality of domains. ### Claim 12 (depends on 11) The liquid crystal display of claim 11, wherein the plurality of domains are divided into a first region and a second region, and a polar angle of the first alignment control agent provided in the first region is different from a polar angle of the first alignment control agent provided in the second region. ### Claim 13 (depends on 12) The liquid crystal display of claim 12, wherein the first alignment control agent is generated by polymerizing a photo-polymerizable monomer or oligomer. ### Claim 14 (depends on 11) The liquid crystal display of claim 11, wherein the middle of the first electrode is bent. ### Claim 15 (depends on 12) The liquid crystal display of claim 12, wherein the liquid crystal display further includes a second alignment layer formed on the second panel and contacting the liquid crystal layer, wherein the second alignment layer includes a second alignment base layer and a second alignment control agent, the second alignment base layer represents a material for vertically aligning liquid crystal of the liquid crystal layer, and the second alignment control agent comes out of the second alignment base layer and provides alignment force to the liquid crystal. ### Claim 16 (depends on 15) The liquid crystal display of claim 15, wherein the second alignment control agent is generated by polymerizing a photo-polymerizable monomer or oligomer. ### Claim 17 (depends on 16) The liquid crystal display of claim 16, wherein a polar angle of the second alignment control agent provided in the first region is different from a polar angle of the second alignment control agent provided in the second region. ### Claim 18 (depends on 17) The liquid crystal display of claim 17, wherein the first alignment layer and the second alignment layer are optical alignment layers.