# US 2018/0026052 A1 · 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 2018/0026052 A1 - Document ID: US20180026052A1 - Status: Published application - Kind: A1 - Application number: 15/653,416 - Filed: 2017-07-18 - Published: 2018-01-25 - Earliest claimed: 2016-07-25 - Assignees: Funai Electric Co., Ltd. - Applicants: Funai Electric Co., Ltd. - Inventors: Toshiyuki ISHIDA; Kenta IDE - Web page: https://patentgrep.com/patent/US20180026052A1 ## CPC - H10D 86/60: wherein the TFTs are in active matrices - G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors - G04G 9/0035: {constructional} - G09G 3/3685: {Details of drivers for data electrodes} - G09G 3/3688: {suitable for active matrices only} - H10D 86/441: {Interconnections, e.g. scanning lines} - G02F 1/136: Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit (G02F1/135 takes precedence) - G09G 3/36: using liquid crystals - G09G 2320/0223: Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - 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 - G04G: ELECTRONIC TIME-PIECES - 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 display device includes a display panel, a signal generator, a plurality of wires, and a controller. The display panel has a plurality of pixels. The signal generator supplies data signal to the pixels. The wires connect output ends of the signal generator to input ends of the pixels, respectively. The controller varies at least one of voltage waveform and current waveform corresponding to the data signal at the output ends according to lengths of the wires. ## Claims ### Claim 1 A liquid crystal display device comprising: a display panel having a plurality of pixels; a signal generator that supplies data signal to the pixels; a plurality of wires connecting output ends of the signal generator to input ends of the pixels, respectively; and a controller that varies at least one of voltage waveform and current waveform corresponding to the data signal at the output ends according to lengths of the wires. ### Claim 2 (depends on 1) The liquid crystal display device according to claim 1, wherein the current waveform includes a first current level and a second current level that is lower than the first current level, and the controller varies the first current level according to the lengths of the wires. ### Claim 3 (depends on 2) The liquid crystal display device according to claim 2, wherein the first current level at one of the output ends connected to one of the wires that has a specific length is higher than the first current level at another one of the output ends connected to another one of the wires that is shorter than the specific length while supplying data signal corresponding to a specific gradation to the pixels. ### Claim 4 (depends on 1) The liquid crystal display device according to claim 1, wherein the voltage waveform includes a first voltage level and a second voltage level that is lower than the first voltage level, and the controller varies at least one of the first voltage level and a duration of the first voltage level according to the lengths of the wires. ### Claim 5 (depends on 4) The liquid crystal display device according to claim 4, wherein the first voltage level at one of the output ends connected to one of the wires that has a specific length is higher than the first voltage level at another one of the output ends connected to another one of the wires that is shorter than the specific length while supplying data signal corresponding to a specific gradation to the pixels. ### Claim 6 (depends on 4) The liquid crystal display device according to claim 4, wherein the duration of the first voltage level at one of the output ends connected to one of the wires that has a specific length is longer than the duration of the first voltage level at another one of the output ends connected to another one of the wires that is shorter than the specific length while supplying data signal corresponding to a specific gradation to the pixels. ### Claim 7 (depends on 6) The liquid crystal display device according to claim 6, wherein the first voltage levels at the output ends connected to the wires are substantially equal to each other while supplying the data signal corresponding to the specific gradation to the pixels. ### Claim 8 (depends on 5) The liquid crystal display device according to claim 5, wherein the durations of the first voltage levels at the output ends connected to the wires are substantially equal to each other while supplying the data signal corresponding to the specific gradation to the pixels. ### Claim 9 (depends on 4) The liquid crystal display device according to claim 4, wherein the voltage waveform includes a third voltage level that is lower than the second voltage level, and the controller varies at least one of the third voltage level and a duration of the third voltage level according to the lengths of the wires. ### Claim 10 (depends on 9) The liquid crystal display device according to claim 9, wherein the third voltage level at one of the output ends connected to one of the wires that has a specific length is lower than the third voltage level at another one of the output ends connected to another one of the wires that is shorter than the specific length while supplying data signal corresponding to a specific gradation to the pixels. ### Claim 11 (depends on 9) The liquid crystal display device according to claim 9, wherein the duration of the third voltage level at one of the output ends connected to one of the wires that has a specific length is longer than the duration of the third voltage level at another one of the output ends connected to another one of the wires that is shorter than the specific length while supplying data signal corresponding to a specific gradation to the pixels. ### Claim 12 (depends on 11) The liquid crystal display device according to claim 11, wherein the third voltage levels at the output ends connected to the wires are substantially equal to each other while supplying the data signal corresponding to the specific gradation to the pixels. ### Claim 13 (depends on 10) The liquid crystal display device according to claim 10, wherein the durations of the third voltage levels at the output ends connected to the wires are substantially equal to each other while supplying the data signal corresponding to the specific gradation to the pixels. ### Claim 14 (depends on 1) The liquid crystal display device according to claim 1, wherein a difference in chromaticity coordinates in any two regions on the display panel falls within a specific range while supplying a data signal corresponding to a specific gradation to the pixels. ### Claim 15 (depends on 14) The liquid crystal display device according to claim 14, wherein the chromaticity coordinates each have an x coordinate and a y coordinate, and at least one of a difference in the x coordinates and a difference in the y coordinates in the two regions falls within a range that is more than or equal to 0 and less than or equal to 0.03. ### Claim 16 (depends on 14) The liquid crystal display device according to claim 14, wherein the chromaticity coordinates each have an x coordinate and a y coordinate, and at least one of a difference in the x coordinates and a difference in the y coordinates in the two regions falls within a range that is more than or equal to 0 and less than or equal to 0.02. ### Claim 17 (depends on 1) The liquid crystal display device according to claim 1, wherein the display panel has a rectangular shape, and one of the wires that is connected to one of the input ends located closest to a corner of the display panel is the longest among the wires. ### Claim 18 (depends on 1) The liquid crystal display device according to claim 1, wherein the display panel has a rectangular shape, and one of the wires that is connected to one of the input ends located closest to an end of a long side of the display panel is the longest among the wires. ### Claim 19 (depends on 1) The liquid crystal display device according to claim 1, wherein the display panel has a rectangular shape, and one of the wires that is connected to one of the input ends located closest to a center of a side of the display panel is the longest among the wires. ### Claim 20 (depends on 1) The liquid crystal display device according to claim 1, wherein the display panel has a rectangular shape, and one of the wires that is connected to one of the input ends located closest to a center of a long side of the display panel is the longest among the wires.