# US 10,371,992 B2 · Blue phase liquid crystal panel and blue phase 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 10,371,992 B2 - Document ID: US10371992B2 - Status: Granted - Kind: B2 - Application number: 14/897,346 - Filed: 2015-08-14 - Published: 2018-03-29 - Granted: 2019-08-06 - Earliest claimed: 2015-08-04 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd. - Inventors: Yuejun Tang - Web page: https://patentgrep.com/patent/US10371992B2 ## CPC - G02F 1/1343: Electrodes {(reflective electrodes G02F1/133553)} - C09K 19/0275: {Blue phase} - G02F 1/133707: {Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes} - G02F 1/134309: {characterised by their geometrical arrangement} - G02F 1/134381: {Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates} - 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 - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A blue phase liquid crystal panel is disclosed, which includes an upper substrate, a lower substrate, and blue phase liquid crystal that is arranged between the upper substrate and the lower substrate. The upper substrate is provided with a first electrode base layer which has a plurality of first protrusions, and the lower substrate is provided with a second electrode base layer which has a plurality of second protrusions. The first protrusions each extend to a position between two adjacent second protrusions, and the second protrusions each extend to a position between two adjacent first protrusions. The first protrusion is provided with a common electrode, and the second protrusion is provided with a pixel electrode. The driving voltage of blue phase liquid crystal in the panel can be reduced. ## Claims ### Claim 1 A blue phase liquid crystal panel, comprising an upper substrate and a lower substrate that are arranged facing each other, and blue phase liquid crystal that is arranged between the upper substrate and the lower substrate, wherein the upper substrate, on a surface thereof facing the blue phase liquid crystal, is provided with a first electrode base layer which has a plurality of first protrusions, and the lower substrate, on a surface thereof facing the blue phase liquid crystal, is provided with a second electrode base layer which has a plurality of second protrusions; wherein the first protrusions each extend to a position between two adjacent second protrusions, and the second protrusions each extend to a position between two adjacent first protrusions; wherein the first protrusions are provided with a common electrode, and the second protrusions are provided with a pixel electrode; wherein the pixel electrode comprises a first pixel electrode and a second pixel electrode; wherein one of the two adjacent second protrusions is provided with the first pixel electrode, and the other one of the two adjacent second protrusions is provided with the second pixel electrode; wherein a horizontal electric field is formed between the first pixel electrode and the second pixel electrode; and wherein a second common electrode is arranged between the pixel electrode and the lower substrate in an insulation manner, and a top surface area of the first protrusion facing the second common electrode is not provided with a common electrode. ### Claim 2 (depends on 1) The blue phase liquid crystal panel according to claim 1, wherein the first protrusion and the second protrusion both have a triangle-shaped cross section. ### Claim 3 (depends on 1) The blue phase liquid crystal panel according to claim 1, wherein the first protrusion and the second protrusion both have a rectangle-shaped cross section. ### Claim 4 (depends on 1) The blue phase liquid crystal panel according to claim 1, wherein the common electrodes cover the first electrode base layer completely, and the pixel electrodes cover the second electrode base layer completely. ### Claim 5 (depends on 1) The blue phase liquid crystal panel according to claim 1, wherein the first electrode base layer comprises a first baseplate, and the first protrusions are arranged spaced from one another on the first baseplate; and wherein the second electrode base layer comprises a second baseplate, and the second protrusions are arranged spaced from one another on the second baseplate. ### Claim 6 (depends on 5) The blue phase liquid crystal panel according to claim 5, wherein an area of the first baseplate corresponding to the second protrusion is not provided with the common electrode; and wherein an area of the second baseplate corresponding to the first protrusion is not provided with the pixel electrode. ### Claim 7 A blue phase liquid crystal display device, comprising a blue phase liquid crystal panel, which comprises: an upper substrate and a lower substrate that are arranged facing each other, and blue phase liquid crystal that is arranged between the upper substrate and the lower substrate, wherein the upper substrate, on a surface thereof facing the blue phase liquid crystal, is provided with a first electrode base layer which has a plurality of first protrusions, and the lower substrate, on a surface thereof facing the blue phase liquid crystal, is provided with a second electrode base layer which has a plurality of second protrusions; wherein the first protrusions each extend to a position between two adjacent second protrusions, and the second protrusions each extend to a position between two adjacent first protrusions; wherein the first protrusions are provided with a common electrode, and the second protrusions are provided with a pixel electrode; wherein the pixel electrode comprises a first pixel electrode and a second pixel electrode; wherein one of the two adjacent second protrusions is provided with the first pixel electrode, and the other one of the two adjacent second protrusions is provided with the second pixel electrode; wherein a horizontal electric field is formed between the first pixel electrode and the second pixel electrode; and wherein a second common electrode is arranged between the pixel electrode and the lower substrate in an insulation manner, and a top surface area of the first protrusion facing the second common electrode is not provided with a common electrode. ### Claim 8 (depends on 7) The blue phase liquid crystal display device according to claim 7, wherein the first protrusion and the second protrusion both have a triangle-shaped cross section. ### Claim 9 (depends on 7) The blue phase liquid crystal display device according to claim 7, wherein the first protrusion and the second protrusion both have a rectangle-shaped cross section. ### Claim 10 (depends on 7) The blue phase liquid crystal display device according to claim 7, wherein the common electrodes cover the first electrode base layer completely, and the pixel electrodes cover the second electrode base layer completely. ### Claim 11 (depends on 7) The blue phase liquid crystal display device according to claim 7, wherein the first electrode base layer comprises a first baseplate, and the first protrusions are arranged spaced from one another on the first baseplate; and wherein the second electrode base layer comprises a second baseplate, and the second protrusions are arranged spaced from one another on the second baseplate. ### Claim 12 (depends on 11) The blue phase liquid crystal display device according to claim 11, wherein an area of the first baseplate corresponding to the second protrusion is not provided with the common electrode; and wherein an area of the second baseplate corresponding to the first protrusion is not provided with the pixel electrode.