# US 9,520,091 B2 · Liquid crystal cell and the liquid crystal display with the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,091 B2 - Document ID: US9520091B2 - Status: Granted - Kind: B2 - Application number: 13/981,356 - Filed: 2013-06-24 - Published: 2014-12-18 - Granted: 2016-12-13 - Earliest claimed: 2013-06-17 - Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd. - Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd. - Inventors: Jhen-wei He - Web page: https://patentgrep.com/patent/US9520091B2 ## CPC - G02F 1/1347: Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells - G09G 3/36: using liquid crystals - G02F 2203/64: Normally black display, i.e. the off state being black - G02F 2203/66: Normally white display, i.e. the off state being white - G09G 2300/023: Display panel composed of stacked panels - G09G 2300/0469: Details of the physics of pixel operation - G09G 2300/0478: related to liquid crystal pixels - G09G 2310/06: Details of flat display driving waveforms - G09G 2320/0252: Improving the response speed - G09G 2320/0257: Reduction of after-image effects - G09G 2320/0261: in the context of movement of objects on the screen or movement of the observer relative to the screen - 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 - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A liquid crystal (LC) cell and the liquid crystal display with the same are disclosed. The LC cell includes a first LC cell and a second LC cell arranged opposite to the first LC cell, wherein the first LC cell is a normally white cell, and the second LC cell is a normally black cell. A display brightness of the second LC cell is white when the display brightness of the first LC cell transforms from white to black. The display brightness of the first LC cell is white when the display brightness of the second LC cell transforms from black to white. By mixing the normally white cell and the normally black cell, the response time is enhanced. In addition, the tracking or blurring effects occurring for the moving objects are efficiently eliminated. ## Claims ### Claim 1 A liquid crystal (LC) cell, comprising: a first LC cell and a second LC cell arranged opposite to the first LC cell, wherein the first LC cell is a normally white cell, and the second LC cell is a normally black cell; and wherein the LC cell comprises a plurality of pixels arranged in a matrix form, each of the pixels being configured with a first transistor and a second transistor, and each of the pixels is driven by two gate lines and two data lines, a first gate line turns on a gate of the first transistor and a first data line provides data voltage to the pixels by a source of the first transistor when the display brightness of the LC cell transforms from white to black, and a second gate line turns on a gate of the second transistor and a second data line provides the data voltage to the pixel by a source of the second transistor when the display brightness of the LC cell transforms from black to white; and wherein a time period for the diving voltage of the first LC cell is the same with that of the second LC cell, the driving voltage of the first LC cell remains at a high level for a first high time period and remains at a low level for a first low time period, the driving voltage of the second LC cell remains at the high level for a second high time period and remains at the low level for a second low time period, when the first high time period equals the first low time period, the second high time period equals to a sum of the second low time period and a response time for which the display brightness of the second LC cell transforms from white to black. ### Claim 2 (depends on 1) The LC cell as claimed in claim 1, wherein a display brightness of the second LC cell is white when the display brightness of the first LC cell transforms from white to black, and the display brightness of the second LC cell is black when the display brightness of the first LC cell transforms from black to white. ### Claim 3 (depends on 2) The LC cell as claimed in claim 2, wherein the display brightness of the first LC cell is white when the display brightness of the second LC cell transforms from black to white, and the display brightness of the first LC cell is black when the display brightness of the second LC cell transforms from white to black. ### Claim 4 (depends on 1) The LC cell as claimed in claim 1, wherein the display brightness of the first LC cell is white when the display brightness of the second LC cell transforms from black to white, and the display brightness of the first LC cell is black when the display brightness of the second LC cell transforms from white to black. ### Claim 5 A liquid crystal display, comprising: a liquid crystal (LC) cell and a backlight module arranged opposite to the LC cell, the backlight module supplies light to the LC cell, and the LC cell comprises a first LC cell and a second LC cell arranged opposite to the first LC cell, wherein the first LC cell is a normally white cell, and the second LC cell is a normally black cell; and wherein the LC cell comprises a plurality of pixels arranged in a matrix form, each of the pixels being configured with a first transistor and a second transistor, and each of the pixels is driven by two gate lines and two data lines, a first gate line turns on a gate of the first transistor and a first data line provides data voltage to the pixels by a source of the first transistor when the display brightness of the LC cell transforms from white to black, and a second gate line turns on a gate of the second transistor and a second data line provides the data voltage to the pixel by a source of the second transistor when the display brightness of the LC cell transforms from black to white; and wherein a time period for the diving voltage of the first LC cell is the same with that of the second LC cell, the driving voltage of the first LC cell remains at a high level for a first high time period and remains at a low level for a first low time period, the driving voltage of the second LC cell remains at the high level for a second high time period and remains at the low level for a second low time period, when the first high time period equals the first low time period, the second high time period equals to a sum of the second low time period and a response time for which the display brightness of the second LC cell transforms from white to black. ### Claim 6 (depends on 5) The liquid crystal display as claimed in claim 5, wherein a display brightness of the second LC cell is white when the display brightness of the first LC cell transforms from white to black, and the display brightness of the second LC cell is black when the display brightness of the first LC cell transforms from black to white. ### Claim 7 (depends on 6) The liquid crystal display as claimed in claim 6, wherein the display brightness of the first LC cell is white when the display brightness of the second LC cell transforms from black to white, and the display brightness of the first LC cell is black when the display brightness of the second LC cell transforms from white to black. ### Claim 8 (depends on 5) The liquid crystal display as claimed in claim 5, wherein the display brightness of the first LC cell is white when the display brightness of the second LC cell transforms from black to white, and the display brightness of the first LC cell is black when the display brightness of the second LC cell transforms from white to black.