# US 10,121,400 B2 · Video processing circuit, electro-optical device, electronic apparatus, and video processing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,400 B2 - Document ID: US10121400B2 - Status: Granted - Kind: B2 - Application number: 15/488,038 - Filed: 2017-04-14 - Published: 2017-11-02 - Granted: 2018-11-06 - Earliest claimed: 2016-04-28 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Kazuhisa Mizusako; Hiroyuki Hosaka - Web page: https://patentgrep.com/patent/US10121400B2 ## CPC - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - G02F 1/133707: {Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes} - G02F 1/136286: {Wiring, e.g. gate line, drain line} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 3/3677: {suitable for active matrices only} - G09G 3/3688: {suitable for active matrices only} - G02F 1/13373: {Disclination line; Reverse tilt} - G02F 2201/121: common or background - G02F 2201/123: pixel - G09G 2310/0289: Details of voltage level shifters arranged for use in a driving circuit - G09G 2320/02: Improving the quality of display appearance - G09G 2320/0252: Improving the response speed - G09G 2330/08: Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared - G09G 2330/10: Dealing with defective pixels - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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) - 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 ## Abstract A video processing circuit includes a detecting unit that detects a set of a first pixel and a second pixel adjacent to the first pixel, which is a set of pixels in which a difference between application voltages to the first pixel and the second pixel which are indicated by an input video signal is greater than or equal to a threshold; an acquisition unit that acquires information which specifies a plurality of regions of voltage-brightness characteristics which are voltage-brightness characteristics of the pixel group and in which a voltage region is separated into the plurality of regions in accordance with a slope of the voltage-brightness characteristics; and a replacing unit that replaces the application voltage to the first pixel with a voltage which is in a region other than a first region and is close to a second region. ## Claims ### Claim 1 A video processing circuit comprising: a processor or circuit configured to: detect a set of a first pixel and a second pixel that is adjacent to the first pixel from a pixel group that is arranged in a first direction and a second direction, the first and second pixels being a set of pixels in which a difference between application voltages to the first pixel and the second pixel is greater than or equal to a threshold; acquire information specifying a plurality of regions of voltage-brightness characteristics of the pixel group, the plurality of regions being divided from each other based on a slope of the voltage-brightness characteristics of a respective region, the plurality of regions of the voltage-brightness characteristics of the pixel group being separated into three or more regions; in response to the application voltage to the first pixel contained in a first voltage region being different from the application voltage to the second pixel contained in a second voltage region where the second voltage region is different from the first voltage region, replace the application voltage to the first pixel with a voltage that is in a voltage region other than the first voltage region and has voltage-brightness characteristics close to the second voltage region; and in response to a third voltage region being interposed between the first voltage region and the second voltage region, replace the application voltage to the first pixel and the application voltage to the second pixel with a voltage in the third voltage region. ### Claim 2 (depends on 1) The video processing circuit according to claim 1, wherein the processor or circuit is further configured to: replace a pixel in the set of pixels, which is contained in a region where a slope of the voltage-brightness characteristics is smoother, with the first pixel. ### Claim 3 (depends on 1) The video processing circuit according to claim 1, wherein the processor or circuit is further configured to: determine the replaced application voltage to the first pixel based on the application voltage to the second pixel. ### Claim 4 (depends on 1) The video processing circuit according to claim 1, wherein the processor or circuit is further configured to: correct at least one of the application voltages to the first pixel and the second pixel such that a difference between the application voltages to the first pixel and the second pixel is reduced. ### Claim 5 (depends on 4) The video processing circuit according to claim 4, wherein the processor or circuit is further configured to: multiply the application voltage to the first pixel by a correction coefficient, and determine the correction coefficient with respect to each of the plurality of regions. ### Claim 6 (depends on 5) The video processing circuit according to claim 5, wherein the steeper the slope of the voltage-brightness characteristics in the plurality of regions is, the smaller a value of the correction coefficient is. ### Claim 7 (depends on 5) The video processing circuit according to claim 5, wherein the processor or circuit is further configured to: correct the application voltage to the first pixel based on the correction coefficient whose value is determined in accordance with the application voltage to the second pixel. ### Claim 8 An electro-optical device comprising: a display that includes a pixel group that are disposed in a first direction and a second direction; and a processor or circuit configured to: detect a set of a first pixel and a second pixel that is adjacent to the first pixel from the pixel group, the first and second pixels being a set of pixels in which a difference between application voltages to the first pixel and the second pixel is greater than or equal to a threshold; acquire information specifying a plurality of regions of voltage-brightness characteristics of the pixel group, the plurality of regions being divided from each other based on a slope of the voltage-brightness characteristics of a respective region, the plurality of regions of the voltage-brightness characteristics of the pixel group being separated into three or more regions; in response to the application voltage to the first pixel contained in a first voltage region being different from the application voltage to the second pixel contained in a second voltage region where the second voltage region is different from the first voltage region, replace the application voltage to the first pixel with a voltage that is in a voltage region other than the first voltage region and has voltage-brightness characteristics close to the second voltage region; and in response to a third voltage region being interposed between the first voltage region and the second voltage region, replace the application voltage to the first pixel and the application voltage to the second pixel with a voltage in the third voltage region. ### Claim 9 (depends on 8) An electronic apparatus comprising: electro-optical device according to claim 8. ### Claim 10 A video processing method comprising: detecting a set of a first pixel and a second pixel that is adjacent to the first pixel from a pixel group that is arranged in a first direction and a second direction, the first and second pixels being a set of pixels in which a difference between application voltages to the first pixel and the second pixel is greater than or equal to a threshold; acquiring information specifying a plurality of regions of voltage-brightness characteristics of the pixel group, the plurality of regions being divided from each other based on a slope of the voltage-brightness characteristics of a respective region, the plurality of regions of the voltage-brightness characteristics of the pixel group being separated into three or more regions; in response to the application voltage to the first pixel contained in a first voltage region being different from the application voltage to the second pixel contained in a second voltage region where the second voltage region is different from the first voltage region, replacing the application voltage to the first pixel with a voltage that is in a voltage region other than the first voltage region and has voltage-brightness characteristics close to the second voltage region; and in response to a third voltage region being interposed between the first voltage region and the second voltage region, replacing the application voltage to the first pixel and the application voltage to the second pixel with a voltage in the third voltage region.