# US 2015/0145901 A1 · Display device and method of driving the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0145901 A1 - Document ID: US20150145901A1 - Status: Published application - Kind: A1 - Application number: 14/553,662 - Filed: 2014-11-25 - Published: 2015-05-28 - Earliest claimed: 2013-11-25 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: SungGae Lee; HeeJung Hong; Dong-Woo Lee - Web page: https://patentgrep.com/patent/US20150145901A1 ## CPC - G09G 3/3614: {Control of polarity reversal in general} - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2320/0257: Reduction of after-image effects - G09G 2320/103: Detection of image changes, e.g. determination of an index representative of the image change - G09G 2330/021: Power management, e.g. power saving - 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 display device and a method of driving the same. The display device includes a display panel on which a plurality of data lines and a plurality of gate lines intersect each other to form a matrix, with a number of pixels being defined at intersections of the plurality of data lines and the plurality of gate lines. A data driver is connected to the plurality of data lines. A gate driver is connected to the plurality of gate lines. A timing controller controls the display panel to operate in a driving mode that changes depending on image signals. ## Claims ### Claim 1 A display device comprising: a display panel on which a plurality of data lines and a plurality of gate lines intersect each other to form a matrix, with a number of pixels being defined at intersections of the plurality of data lines and the plurality of gate lines; a data driver connected to the plurality of data lines; a gate driver connected to the plurality of gate lines; and a timing controller which controls the display panel to operate in a driving mode that changes depending on image signals. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the timing controller comprises: an input section which receives timing signals and the image signals transmitted from a host system; a storage section which stores the image signals received from the input section; a driving mode changing section which analyzes the image signals and changes the driving mode depending on the image signals; and an output section which outputs image signals and control signals according to the driving mode changed by the driving mode changing section. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the driving mode comprises inversion driving, and the timing controller controls the display panel to be driven by the inversion driving that changes depending on a difference between data values of the image signals of a predetermined frame. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the timing controller controls the display panel to be driven by conversion driving changed depending on a difference between data values of the image signals of a predetermined frame in a row direction. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the driving mode comprises inversion driving that is one selected from the group consisting of dot inversion, line inversion and frame inversion. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the driving mode comprises frequency driving, and the timing controller controls the display pane to be driven at a drive frequency that changes depending on a variation in the image signals between adjacent frames. ### Claim 7 (depends on 6) The display device according to claim 6, wherein the variation in the image signals is calculated as a total of differences between gray scales of the image signals between the adjacent frames. ### Claim 8 (depends on 1) The display device according to claim 1, wherein the driving mode comprises frequency driving, and the timing controller controls the display panel to be driven at the drive frequency that changes depending on levels of complexity of the image signals of a predetermined frame. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the driving mode comprises frequency driving, and the timing controller controls the display panel to be driven at a first drive frequency depending on a variation in the image signals between adjacent frames and at a second drive signal depending on levels of complexity of the image signals within a predetermined frame. ### Claim 10 A method of driving a display device, comprising: receiving image signals of a predetermined frame; calculating a difference in data value between the image signals of the predetermined frame or levels of complexity of the image signals of adjacent frames; and controlling a display panel to operate in a driving mode selected from the group consisting of dot inversion, a column inversion and frame inversion depending on the difference in the data value between the image signals of the predetermined frame or the levels of complexity of the image signals of the predetermined frame. ### Claim 11 (depends on 10) The method according to claim 10, wherein controlling the display panel comprises controlling the display panel to be driven at a drive frequency that changes depending on the levels of complexity of the image signals of the predetermined frame. ### Claim 12 (depends on 10) The method according to claim 10, further comprising: if a variation in the image signals between the adjacent frames is equal to or greater than a predetermined amount, controlling a display panel to be driven at an ordinary drive frequency; if the variation in the image signals between the adjacent frames is less than the predetermined amount, calculating the levels of complexity of the image signals within the predetermined frame; and further, changing the ordinary drive frequency to a second drive frequency depending on levels of complexity of the image signals within an Nth frame. ### Claim 13 A display device comprising: a display panel on which a plurality of data lines and a plurality of gate lines intersect each other to form a matrix, with a number of pixels being defined at intersections of the plurality of data lines and the plurality of gate lines; a data driver connected to the plurality of data lines; a memory storing an image signal of a first drive frequency input from a host system; and a timing controller that controls the display panel to be driven with an image signal of a second drive frequency obtained from the image signal stored in the memory by data multiplying, the second drive frequency being m times the first drive frequency, where m is a real number greater than 1. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the first drive frequency of the image signal is lower than an input drive frequency of a source image. ### Claim 15 (depends on 14) The display device according to claim 14, wherein the source image is a still image, and wherein the first drive frequency is half the input drive frequency, and the second drive frequency is two times the first drive frequency. ### Claim 16 (depends on 13) The display device according to claim 13, wherein the image signal of the first drive frequency is equal to an input drive frequency of a source image. ### Claim 17 (depends on 16) The display device according to claim 16, wherein the source image is a fast moving image, and the second drive frequency is two times the first drive frequency. ### Claim 18 (depends on 13) The display device according to claim 13, wherein the timing controller controls the image signal of the second drive frequency such that the display panel is driven for a predetermined time period and is not driven for the remaining time period, and the data driver is off for the remaining time period. ### Claim 19 (depends on 13) The display device according to claim 13, wherein the first drive frequency of the image signal input from the host system changes depending on a type of a source image classified using a motion vector of the source image. ### Claim 20 (depends on 19) The display device according to claim 19, wherein the type of the source image is classified using motion vectors of sampled dots of the source image.