# US 9,437,137 B2 · Compensation accuracy > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,137 B2 - Document ID: US9437137B2 - Status: Granted - Kind: B2 - Application number: 14/455,990 - Filed: 2014-08-11 - Published: 2015-02-12 - Granted: 2016-09-06 - Earliest claimed: 2013-08-12 - Assignees: Ignis Innovation Inc. - Applicants: Ignis Innovation Inc. - Inventors: Gholamreza Chaji; Nino Zahirovic - Web page: https://patentgrep.com/patent/US9437137B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/2022: {using sub-frames} - G09G 3/3266: Details of drivers for scan electrodes - 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 - G09G 2300/0809: Several active elements per pixel in active matrix panels - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2320/043: Preventing or counteracting the effects of ageing - G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - G09G 2320/0646: Modulation of illumination source brightness and image signal correlated to each other - H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT] - 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) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A system uses image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device by dividing each frame into at least first and second sub-frames, supplying the image data during one of the sub-frames, supplying compensation data during the other of the sub-frames, compensating image data based on the compensation data, and supplying each pixel with a drive current that is based on the compensated image data during each frame. The compensated image data may be supplied from a driver having a preselected data resolution, and the system determines whether the compensated image data is greater than the data resolution of the driver, and if the compensated image data is greater than the data resolution of the driver, transfers the excess compensated image data to a different sub-frame. ## Claims ### Claim 1 A method of using image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device, said method comprising: dividing each frame into a plurality of sub-frames, supplying a pixel with a drive current that is based on data comprising said image data during one of said sub-frames, and supplying the pixel with a drive current that is based on data comprising compensation data during at least two of said sub-frames, the compensation data divided among said at least two of said sub-frames, thereby compensating said image data based on said compensation data to compensate for at least one of aging and non-uniformity of said pixels. ### Claim 2 (depends on 1) The method of claim 1 in which said data comprising said compensation data is supplied from a driver having a preselected data resolution, and which includes determining whether the data comprising said compensation data is greater than the data resolution of said driver, and if the data comprising said compensation data is greater than the data resolution of said driver, transferring the excess data comprising said compensation data to a different sub-frame. ### Claim 3 (depends on 1) The method of claim 1 in which the sub-frame during which the pixel is supplied with a drive current that is based on data comprising said image data is longer in duration than at least one other sub-frame during which the pixel is supplied with a drive current that is based on data comprising said compensation data. ### Claim 4 A method of using image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device, said method comprising: dividing each frame into a plurality of sub-frames, dividing compensation data among said sub-frames, and supplying a pixel with a drive current that is based on data comprising a division of said compensation data during each sub-frame into which said compensation data is divided, thereby compensating image data based on said compensation data to compensate for at least one of aging and non-uniformity of said pixels. ### Claim 5 (depends on 4) The method of claim 4 in which said compensation data is divided equally among said sub-frames, and any residue value is supplied to one of the sub-frames. ### Claim 6 (depends on 4) The method of claim 4 in which said sub-frames have different sizes. ### Claim 7 A method of using image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device, said method comprising: dividing compensation data among a plurality of frames, and supplying a pixel with a drive current that is based on data comprising a division of said compensation data during each frame into which said compensation data is divided, thereby compensating image data based on said compensation data in each frame to compensate for at least one of aging and non-uniformity of said pixels. ### Claim 8 (depends on 7) The method of claim 7, further comprising remapping the image data to a new bit range defined by the total number of bits available in all frames and the number of bits of said compensation data. ### Claim 9 An apparatus for using image data representing images to be displayed in successive frames, to drive a display having an array of pixels that each include a drive transistor and an organic light emitting device, multiple select lines coupled to said array for delivering signals that select when each pixel is to be driven, and multiple data lines for delivering drive signals to the selected pixels, said apparatus comprising: a source driver coupled to said data lines and including a processing circuit for receiving said image data and adapted to divide each frame into a plurality of sub-frames, supply a pixel with a drive current that is based on data comprising said image data during one of said sub-frames, and supply the pixel with a drive current that is based on data comprising compensation data during at least two of said sub-frames, the compensation data divided among said at least two of said sub-frames, to thereby compensate said image data based on said compensation data to compensate for at least one of aging and non-uniformity of said pixels. ### Claim 10 (depends on 9) The apparatus of claim 9 which said data comprising said compensation data is supplied from a driver having a preselected data resolution for supplying said data comprising said compensation data, and in which said processing circuit is adapted to determine whether the data comprising said compensation data is greater than the data resolution of said driver, and if the data comprising said compensation data is greater than the data resolution of said driver, transfer the excess data comprising said compensation data to a different sub-frame. ### Claim 11 An apparatus for using image data representing images to be displayed in successive frames, to drive a display having an array of pixels that each include a drive transistor and an organic light emitting device, multiple select lines coupled to said array for delivering signals that select when each pixel is to be driven, and multiple data lines for delivering drive signals to the selected pixels, said apparatus comprising: a source driver coupled to said data lines and including a processing circuit for receiving said image data and adapted to divide each frame into a plurality of sub-frames, divide compensation data among said sub-frames, and supply a pixel with a drive current that is based on data comprising a division of said compensation data during each sub-frame into which said compensation data is divided, to thereby compensate image data based on said compensation data to compensate for at least one of aging and non-uniformity of said pixels. ### Claim 12 (depends on 11) The apparatus of claim 11 in which said processing circuit is adapted to divide said compensation data equally among said sub-frames, and any residue value is supplied to one of the sub-frames. ### Claim 13 (depends on 11) The apparatus of claim 11 in which said sub-frames have different sizes. ### Claim 14 An apparatus for using image data representing images to be displayed in successive frames, to drive a display having an array of pixels that each include a drive transistor and an organic light emitting device, multiple select lines coupled to said array for delivering signals that select when each pixel is to be driven, and multiple data lines for delivering drive signals to the selected pixels, said apparatus comprising: a source driver coupled to said data lines and including a processing circuit for receiving said image data and adapted to divide compensation data among a plurality of frames, compensate image data based on divisions of said compensation data in each frame to compensate for at least one of aging and non-uniformity of said pixels, and supply each pixel with a drive current that is based on the compensated image data during each frame. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the processing circuit is further adapted to remap the image data to a new bit range defined by the total number of bits available in all frames and the number of bits of said compensation data. ### Claim 16 (depends on 14) The apparatus of claim 14 in which a frame of said plurality of frames supplied with image data is longer than a frame of said plurality of frames supplied with compensation data.