# US 11,114,039 B2 · Micro-display device and method of driving same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,114,039 B2 - Document ID: US11114039B2 - Status: Granted - Kind: B2 - Application number: 16/702,922 - Filed: 2019-12-04 - Published: 2020-06-11 - Granted: 2021-09-07 - Earliest claimed: 2018-12-11 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Sojung Jung; Beom-Jin Kim; Bongchoon Kwak - Web page: https://patentgrep.com/patent/US11114039B2 ## CPC - G09G 3/2014: {by modulation of the duration of a single pulse during which the logic level remains constant} - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - G02B 27/017: {Head mounted} - G02B 2027/0118: {comprising devices for improving the contrast of the display / brillance control visibility} - G02B 2027/014: {comprising information/image processing systems} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - 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 - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A micro-display device comprises a silicon substrate in which a plurality of gate lines, a plurality of data lines, a plurality of emission signal lines, and a plurality of subpixels are disposed; a gate driver circuit disposed on a first side of a pixel array to drive the plurality of gate lines; an emission driver circuit driving the plurality of emission signal lines and disposed on a second side of the pixel array different from the first side of the pixel array where the gate driver circuit is disposed; a data driver circuit disposed on a third side of the pixel array to drive the plurality of data lines; a memory storing duty data regarding duty ratios of an emission signal applied to the plurality of emission signal lines; and a control circuit controlling signals applied to the gate driver circuit, the data driver circuit and the emission driver circuit, wherein the control circuit is set to have different emission times with respect to subpixels connected to the plurality of emission signal lines according to the duty data stored in the memory. ## Claims ### Claim 1 A micro-display device comprising: a silicon substrate in which a plurality of gate lines, a plurality of data lines, a plurality of emission signal lines, and a plurality of subpixels are disposed; a gate driver circuit disposed on a first side of a pixel array to drive the plurality of gate lines; an emission driver circuit driving the plurality of emission signal lines and disposed on a second side of the pixel array different from the first side of the pixel array where the gate driver circuit is disposed; a data driver circuit disposed on a third side of the pixel array to drive the plurality of data lines; a memory storing duty data regarding duty ratios of an emission signal applied to the plurality of emission signal lines; and a control circuit controlling signals applied to the gate driver circuit, the data driver circuit and the emission driver circuit, wherein the control circuit is set to have different emission times with respect to subpixels connected to the plurality of emission signal lines, wherein the duty data corresponding to a first subpixel of the plurality of subpixels is greater than the duty data corresponding to a second subpixel of the plurality of subpixels, and wherein a distance between the first subpixel and the data driver is greater than a distance between the second subpixel and the data driver, wherein the emission driver circuit comprises: at least two emission shifters each sequentially shifting the emission signal and supplying the shifted emission signal to one or more of the plurality of emission signal lines; and at least two emission controllers each controlling one or more of the emission times according to the one or more of the plurality of emission signal lines, the at least two emission controllers directly electrically connected to the at least two emission shifters respectively, wherein the at least two emission shifters respectively connected to either two or more groups each including the one or more of the plurality of emission signal lines, or one of the plurality of emission signal lines, and wherein the at least two emission controllers each comprises: a duty register receiving the duty data used to determine one or more emission times corresponding to the one or more of the plurality of emission signal lines and stored in the memory; a counter counting counter clock signals; and a comparator comparing a counting value, obtained by counting the counter clock signals by the counter, with the duty data, if the counting value is smaller than the duty data, maintaining the emission signal at a level, at which the subpixels are turned on, and if the counting value is equal to the duty data, transiting the emission signal to a level, at which the subpixels are turned off. ### Claim 2 (depends on 1) The micro-display device according to claim 1, wherein the memory is disposed within the control circuit. ### Claim 3 (depends on 1) The micro-display device according to claim 1, wherein the duty data has a different value on at least two emission signal lines. ### Claim 4 (depends on 3) The micro-display device according to claim 3, wherein the duty data is determined such that an emission signal line located farther from the data driver circuit has a longer emission time. ### Claim 5 (depends on 1) The micro-display device according to claim 1, wherein the counter clock signals are generated from a gate clock signal or a source clock signal. ### Claim 6 An emission driver circuit disposed on a silicon substrate in which a plurality of gate lines, a plurality of data lines, a plurality of emission signal lines, and a plurality of subpixels are disposed, opposite to a gate driver circuit with respect to a pixel array, to drive the plurality of emission signal lines, the gate driver circuit driving the plurality of gate lines, the emission driver circuit comprising: at least two emission shifters each sequentially shifting an emission signal and supplying the shifted emission signal to one or more of the plurality of emission signal lines; and at least two emission controllers each controlling an emission time of the emission signal using duty data having different values according to one or more of the plurality of emission signal lines, the at least two emission controllers directly electrically connected to the at least two emission shifters respectively, wherein the duty data corresponding to a first subpixel of the plurality of subpixels is greater than the duty data corresponding to a second subpixel of the plurality of subpixels, wherein a distance between the first subpixel and the data driver is greater than a distance between the second subpixel and the data driver, wherein the at least two emission shifters respectively connected to either two or more groups each including one or more of the plurality of emission signal lines, or one of the plurality of emission signal lines, and wherein the at least two emission controllers each comprises: a duty register receiving the duty data used to determine one or more emission times corresponding to the one or more of the plurality of emission signal lines and stored in the memory; a counter counting counter clock signals; and a comparator comparing a counting value, obtained by counting the counter clock signals by the counter, with the duty data, if the counting value is smaller than the duty data, maintaining the emission signal at a level, at which one or more corresponding subpixels are turned on, and if the counting value is equal to the duty data, transiting the emission signal to a level, at which the one or more subpixels are turned off. ### Claim 7 (depends on 6) The micro-display device according to claim 6, wherein the duty data has a different value at least two emission signal lines. ### Claim 8 (depends on 6) The micro-display device according to claim 6, wherein the duty data is determined such that an emission signal line located farther from the data driver circuit has a longer emission time. ### Claim 9 (depends on 6) The emission driver circuit according to claim 6, wherein the counter clock signals are generated from a gate clock signal or a source clock signal. ### Claim 10 A method of driving a micro-display device including a silicon substrate in which a plurality of gate lines, a plurality of data lines, a plurality of emission signal lines, and a plurality of subpixels are disposed, the method comprising: applying an emission signal by sequentially shifting the emission signal using at least two emission shifters according to the plurality of emission signal lines; receiving duty data having different values according to the plurality of emission signal lines; counting counter clock signals; comparing a counting value, obtained by counting the counter clock signals, with the duty data; and if the counting value is smaller than the duty data, maintaining the emission signal at a level, at which one or more corresponding subpixels are turned on, and if the counting value is equal to the duty data, transiting the emission signal, applied to a corresponding emission signal line among the plurality of emission signal lines, to a level, at which the one or more subpixels are turned off, wherein the duty data corresponding to a first subpixel of the plurality of subpixels is greater than the duty data corresponding to a second subpixel of the plurality of subpixels, wherein a distance between the first subpixel and the data driver is greater than a distance between the second subpixel and the data driver, and wherein the emission driver circuit comprises: at least two emission controllers each controlling one or more of the emission times according to one or more of the plurality of emission signal lines, the at least two emission controllers directly electrically connected to the at least two emission shifters respectively, wherein the at least two emission shifters respectively connected to either two or more groups each including the one or more of the plurality of emission signal lines, or one of the plurality of emission signal lines, and wherein the at least two emission controllers each comprises a duty register receiving the duty data used to determine one or more emission times corresponding to the one or more of the plurality of emission signal lines and stored in the memory. ### Claim 11 (depends on 10) The method according to claim 10, wherein the duty data is determined such that an emission signal line located farther from a data driver circuit has a longer emission time. ### Claim 12 (depends on 1) The micro-display device according to claim 1, wherein the duty data is configured to be increased by a predetermined value for each of the two or more groups.