# US 8,786,586 B2 · Scanning orders in inversion schemes of displays > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,786,586 B2 - Document ID: US8786586B2 - Status: Granted - Kind: B2 - Application number: 13/143,186 - Filed: 2011-05-24 - Published: 2012-11-29 - Granted: 2014-07-22 - Earliest claimed: 2011-05-24 - Assignees: Apple Inc. - Applicants: Hopil Bae; Zhibing Ge - Inventors: Hopil Bae; Zhibing Ge - Web page: https://patentgrep.com/patent/US8786586B2 ## CPC - G09G 3/3614: {Control of polarity reversal in general} - G09G 2310/02: Addressing, scanning or driving the display screen or processing steps related thereto - G09G 2320/0209: Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display - 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 Updating an image of a display is provided by scanning rows of sub-pixels of the display by applying voltages to pixel electrodes of adjacent sub-pixels in different lines such that polarity changes in opposite directions can occur in two sub-pixels that are adjacent to a particular sub-pixel. In one example, a positive-polarity voltage can be applied to one sub-pixel that is adjacent to a particular sub-pixel, causing a swing in the polarity of the sub-pixel from negative to positive. A negative-polarity voltage can be applied to another sub-pixel that is adjacent to the particular sub-pixel, swinging the polarity of the pixel electrode from positive to negative. A change in brightness of the particular sub-pixel that may result from a voltage swing one direction in an adjacent sub-pixel may be offset by a change in brightness of the particular sub-pixel that may result from a voltage swing in another adjacent sub-pixel. ## Claims ### Claim 1 A method of updating an image displayed by a display screen in a first image frame, the display screen including a plurality of sub-pixels, the method comprising: updating one or more target sub-pixels by applying a target voltage to the one or more target sub-pixels; updating, after the update of the one or more target sub-pixels, one or more first sub-pixels by applying a first voltage to the one or more first sub-pixels, the one or more first sub-pixels being adjacent to the one or more target sub-pixels, wherein the application of the first voltage changes a voltage polarity of the one or more first sub-pixels in one of a positive direction and a negative direction and the application of the first voltage causes a first brightness change to the one or more target sub-pixels; and updating, after the update of the one or more first sub-pixels, one or more second sub-pixels by applying a second voltage to the one or more second sub-pixels, the one or more second sub-pixels being adjacent to the one or more target sub-pixels, wherein the application of the second voltage changes a voltage polarity of the one or more second sub-pixels in an opposite direction as the change in voltage polarity of the one or more first sub-pixels and the application of the second voltage causes a second brightness change to the one or more target sub-pixels, the second brightness change offsetting the first brightness change. ### Claim 2 (depends on 1) The method of claim 1, wherein the application of the target voltage changes a voltage polarity of the one or more target sub-pixels. ### Claim 3 (depends on 1) The method of claim 1, wherein the plurality of sub-pixels are updated according to an inversion scheme, and the one or more target sub-pixels, one or more first sub-pixels, and one or more second sub-pixels are included in a block of sub-pixels of the inversion scheme. ### Claim 4 (depends on 3) The method of claim 3, wherein the inversion scheme is one of a 2-line inversion scheme and a 2-dot inversion scheme. ### Claim 5 (depends on 4) The method of claim 4, wherein the block further includes one or more third sub-pixels adjacent to the one or more second sub-pixels, the sub-pixels being arranged in rows such that the one or more first sub-pixels are a first row of the block, the one or more target sub-pixels are a second row of the block, the one or more second sub-pixels are a third row of the block, and the one or more third sub-pixels are a fourth row of the block, and wherein a scanning order of the block is second row, first row, fourth row, and third row. ### Claim 6 (depends on 3) The method of claim 3, wherein the block further includes one or more third sub-pixels adjacent to the one or more second sub-pixels, the method further comprising: updating, before the update of the one or more second subpixels, the one or more third sub-pixels by applying a third voltage to the one or more third sub-pixels. ### Claim 7 (depends on 6) The method of claim 6, wherein the application of the third voltage changes the voltage polarity of the one or more third sub-pixels. ### Claim 8 An apparatus comprising: a display screen including a plurality of sub-pixels including one or more target sub-pixels, one or more first sub-pixels, and one or more second sub-pixels, the one or more target sub-pixels being in between and adjacent to each of the one or more first sub-pixels and the one or more second sub-pixels; and a scanning system that scans the plurality of sub-pixels to update the sub-pixels, including updating the one or more target sub-pixels by applying a target voltage to the one or more target sub-pixels, updating, after the update of the one or more target sub-pixels, one or more first sub-pixels by applying a first voltage to the one or more first sub-pixels, wherein the application of the first voltage changes a voltage polarity of the one or more first sub-pixels in one of a positive direction and a negative direction and the application of the first voltage causes a first brightness change to the one or more target sub-pixels, and updating, after the update of the one or more first sub-pixels, one or more second sub-pixels by applying a second voltage to the one or more second sub-pixels, wherein the application of the second voltage changes a voltage polarity of the one or more second sub-pixels in an opposite direction as the change in voltage polarity of the one or more first sub-pixels and the application of the second voltage causes a second brightness change to the one or more target sub-pixels, the second brightness change offsetting the first brightness change. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the application of the target voltage changes a voltage polarity of the one or more target sub-pixels. ### Claim 10 (depends on 8) The apparatus of claim 8, wherein scanning system scans the plurality of sub-pixels according to an inversion scheme, and the one or more target sub-pixels, one or more first sub-pixels, and one or more second sub-pixels are included in a block of adjacent sub-pixels of the inversion scheme. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the inversion scheme is one of a 2-line inversion scheme and a 2-dot inversion scheme. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the block further includes one or more third sub-pixels adjacent to the one or more second sub-pixels, the one or more third sub-pixels arranged in rows such that the one or more first sub-pixels are a first row of the block, the one or more target sub-pixels are a second row of the block, the one or more second sub-pixels are a third row of the block, and the one or more third sub-pixels are a fourth row of the block, and wherein the scanning system scans the block in a scanning order of the block, the scanning order being second row, first row, fourth row, and third row. ### Claim 13 (depends on 10) The apparatus of claim 10, wherein the block further includes one or more third sub-pixels adjacent to the one or more second sub-pixels, and the scanning of the plurality of lines of sub-pixels by the scanning system further includes updating, before the update of the one or more second sub-pixels, the one or more third sub-pixels by applying a third voltage to one or more third sub-pixels. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the application of the third voltage changes a voltage polarity of the one or more third sub-pixels. ### Claim 15 A non-transitory computer-readable storage medium storing computer-readable instructions that, when executed by a computing device, cause the device to perform a method of updating an image displayed by a display screen in a first image frame, the display screen including a plurality of sub-pixels, the method comprising: updating one or more target sub-pixels by applying a target voltage to the one or more target sub-pixels; updating, after the update of the one or more target sub-pixels, one or more first sub-pixels by applying a first voltage to the one or more first sub-pixels, the one or more first sub-pixels being adjacent to the one or more target sub-pixels, wherein the application of the first voltage changes of a voltage polarity of the one or more first sub-pixels in one of a positive direction and a negative direction and the application of the first voltage causes a first brightness change to the one or more target sub-pixels; and updating, after the update of the one or more first sub-pixels, one or more second sub-pixels by applying a second voltage to one or more second sub-pixels, the one or more second sub-pixels being adjacent to the one or more target sub-pixels, wherein the application of the second voltage changes a voltage polarity of the one or more second sub-pixels in an opposite direction as the change in voltage polarity of the one or more first sub-pixels and the application of the second voltage causes a second brightness change to the one or more target sub-pixels, the second brightness change equal to or less than the first brightness change. ### Claim 16 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the application of the target voltage changes the voltage polarity of the one or more target sub-pixels. ### Claim 17 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the plurality of sub-pixels are updated according to an inversion scheme, and the one or more target subpixels, the one or more first sub-pixels, and the one or more second sub-pixels are included in a block of adjacent sub-pixels of the inversion scheme. ### Claim 18 (depends on 17) The non-transitory computer-readable storage medium of claim 17, wherein the inversion scheme is one of a 2-line inversion scheme and a 2-dot inversion scheme. ### Claim 19 (depends on 18) The non-transitory computer-readable storage medium of claim 18, wherein the block further includes one or more third sub-pixels adjacent to the one or more second sub-pixels, the one or more third sub-pixels arranged in rows such that the one or more first sub-pixels are a first row of the block, the one or more target sub-pixels are a second row of the block, the one or more second sub-pixels are a third row of the block, and the one or more third sub-pixels are the fourth row of the block, and wherein a scanning order of the block is second row, first row, fourth row, and third row. ### Claim 20 (depends on 17) The non-transitory computer-readable storage medium of claim 17, wherein the block further includes one or more third sub-pixels adjacent one or more second sub-pixels, the method further comprising: updating, before the update of the one or more second sub-pixels, the one or more third sub-pixels by applying a third voltage to the one or more third sub-pixels. ### Claim 21 (depends on 20) The non-transitory computer-readable storage medium of claim 20, wherein the application of the third voltage changes a voltage polarity of the one or more third sub-pixels.