# US 2013/0155339 A1 · Liquid crystal display device and method for manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155339 A1 - Document ID: US20130155339A1 - Status: Published application - Kind: A1 - Application number: 13/719,271 - Filed: 2012-12-19 - Published: 2013-06-20 - Earliest claimed: 2011-12-19 - Assignees: Japan Display East Inc. - Inventors: Mika OIWA; Shintaro TAKEDA; Shinichi KOMURA - Web page: https://patentgrep.com/patent/US20130155339A1 ## CPC - G02F 1/13306: {Circuit arrangements or driving methods for the control of single liquid crystal cells (G02F1/132, G02F1/133382 take precedence)} - G02F 1/133555: {Transflectors} - G02F 1/137: characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering - G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]} - G02F 1/13775: {Polymer-stabilized liquid crystal layers} - G02F 1/13793: {Blue phases} - 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 Provided is a liquid crystal display device, including: a first substrate; a second substrate; a liquid crystal material interposed between the first substrate and the second substrate, and combined with a polymer composition to exhibit a blue phase; and a pair of transparent electrodes formed on the first substrate, for applying a lateral field to the liquid crystal material, the lateral field being parallel to the first substrate. The polymer composition is formed to have different densities in a direction between the first substrate and the second substrate. At least in a region overlapping with the pair of transparent electrodes, the polymer composition has a part having a highest density, the part being located closer to the first substrate than to the second substrate. ## Claims ### Claim 1 A liquid crystal display device, comprising: a first substrate; a second substrate; a liquid crystal material interposed between the first substrate and the second substrate, and combined with a polymer composition to exhibit a blue phase; and a pair of transparent electrodes formed on the first substrate, for applying a lateral field to the liquid crystal material, the lateral field being parallel to the first substrate, wherein the polymer composition is formed to have different densities in a direction between the first substrate and the second substrate, and wherein, at least in a region overlapping with the pair of transparent electrodes, the polymer composition has a part having a highest density, the part being located closer to the first substrate than to the second substrate. ### Claim 2 (depends on 1) The liquid crystal display device according to claim 1, wherein, at least in the region overlapping with the pair of transparent electrodes, the polymer composition has a part close to the first substrate, the part having a density that is higher than a density at another part of the polymer composition, which is close to the second substrate. ### Claim 3 (depends on 1) The liquid crystal display device according to claim 1, further comprising a metal electrode formed on the first substrate, wherein the polymer composition is formed so as to avoid a region overlapping with the metal electrode, and wherein, in the region overlapping with the metal electrode, a photocurable resin is added to the liquid crystal material. ### Claim 4 (depends on 1) The liquid crystal display device according to claim 1, further comprising: a metal electrode formed on the first substrate; and a light reflective film formed on the second substrate so as to be opposed to the metal electrode, wherein, in a region overlapping with the metal electrode, the polymer composition has a part close to the second substrate, the part having a density higher than a density at another part of the polymer composition, which is close to the first substrate. ### Claim 5 (depends on 1) The liquid crystal display device according to claim 1, further comprising: a metal electrode formed on the first substrate; and a light reflective film formed on the second substrate so as to be opposed to the metal electrode, wherein, in a region overlapping with the metal electrode, the liquid crystal material has apart close to the first substrate, the part being added with a photocurable resin, and another part close to the second second substrate, the another part being combined with the polymer composition. ### Claim 6 (depends on 4) The liquid crystal display device according to claim 4, wherein the light reflective film reflects ultraviolet light and transmits visible light. ### Claim 7 (depends on 5) The liquid crystal display device according to claim 5, wherein the light reflective film reflects ultraviolet light and transmits visible light. ### Claim 8 A method of manufacturing a liquid crystal display device, comprising: interposing a liquid crystal material added with a photocurable resin between a first substrate and a second substrate; and applying light to the photocurable resin via the first substrate, the first substrate having a pair of transparent electrodes formed thereon, for applying a lateral field to the liquid crystal material, the lateral field being parallel to the first substrate, wherein the applying light comprises generating a polymer composition from the photocurable resin through energy absorption from the light, the light traveling while reducing the energy in a direction from the first substrate to the second substrate, thereby generating, in the polymer composition at least in a region overlapping with the pair of transparent electrodes, a part having a highest density, which is located closer to the first substrate than to the second substrate. ### Claim 9 (depends on 8) The method of manufacturing a liquid crystal display device according to claim 8, wherein, at least in the region overlapping with the pair of transparent electrodes, the polymer composition has a part close to the first substrate, the part having a density that is higher than a density at another part of the polymer composition, which is close to the second substrate. ### Claim 10 (depends on 8) The method of manufacturing a liquid crystal display device according to claim 8, wherein the first substrate has a metal electrode formed thereon, and wherein the applying light comprises generating the polymer composition so as to avoid a region overlapping with the metal electrode that blocks the light. ### Claim 11 (depends on 8) The method of manufacturing a liquid crystal display device according to claim 8, wherein the first substrate has a metal electrode formed thereon, the metal electrode blocking the light, wherein the second substrate has a light reflective film formed thereon, the light reflective film being opposed to the metal electrode, and wherein the applying light comprises reflecting the light by the light reflective film so that the light enters a region overlapping with the metal electrode. ### Claim 12 (depends on 11) The method of manufacturing a liquid crystal display device according to claim 11, wherein the light comprises ultraviolet light, and wherein the light reflective film reflects the ultraviolet light and transmits visible light.