# US 10,121,424 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,424 B2 - Document ID: US10121424B2 - Status: Granted - Kind: B2 - Application number: 15/601,143 - Filed: 2017-05-22 - Published: 2018-05-17 - Granted: 2018-11-06 - Earliest claimed: 2016-11-17 - Assignees: Au Optronics Corporation - Applicants: Au Optronics Corporation - Inventors: Yueh-Hung Chung; Hsueh-Ying Huang; Wei-Chun Wei; Shu-Cheng Kung; Ken-Yu Liu; Ya-Ling Hsu; Chen-Hsien Liao - Web page: https://patentgrep.com/patent/US10121424B2 ## CPC - G09G 3/3607: {for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127)} - G02F 1/134309: {characterised by their geometrical arrangement} - G02F 1/13439: {characterised by their electrical, optical, physical properties; materials therefor; method of making} - G09G 3/2011: {by amplitude modulation} - G09G 3/3655: {Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors} - G02F 1/134345: {Subdivided pixels, e.g. for grey scale or redundancy} - G02F 2201/121: common or background - G02F 2201/123: pixel - 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 2320/046: Dealing with screen burn-in prevention or compensation of the effects thereof - G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - 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 display device includes a first substrate, a second substrate, a display medium, a first pixel electrode, a second pixel electrode and a transparent electrode. Sub-pixel units are defined on the first substrate and the second substrate. A sub-pixel unit has a first sub-pixel and a second sub-pixel. The transparent electrode is disposed on the second substrate, and the transparent electrode receives a first common potential and a second common potential. When grey levels displayed by the first sub-pixel and the second sub-pixel are in the range of about 96 to 180, a potential difference between the first common potential received when the first sub-pixel has the maximum brightness and the second common potential received when the second sub-pixel has the minimum brightness is in the range of about 0 mV to 100 mV. ## Claims ### Claim 1 A display device, comprising: a first substrate; a second substrate; a display medium, disposed between the first substrate and the second substrate, a plurality of sub-pixel units being defined on the first substrate and the second substrate, and at least one of the sub-pixel units having at least one first sub-pixel and at least one second sub-pixel; a first pixel electrode, disposed on the first substrate and corresponding to the first sub-pixel; a second pixel electrode, disposed on the first substrate and corresponding to the second sub-pixel, and the second pixel electrode being separated from the first pixel electrode; and a transparent electrode, disposed on the second substrate, the transparent electrode corresponding respectively to the first pixel electrode of the first sub-pixel and the second pixel electrode of the second sub-pixel, and the transparent electrode receiving a first common potential and a second common potential, wherein when grey levels displayed by the first sub-pixel and the second sub-pixel are in a range of about 96 to 180, a potential difference between a first common potential received by the first sub-pixel having a maximum brightness and a second common potential received by the second sub-pixel having a minimum brightness is in a range of about 0 mV to 100 mV. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the first sub-pixel exhibits a first value of brightness when receiving the first common potential, and the first value of brightness of the first sub-pixel and the first common potential have a convex function relationship; the second sub-pixel exhibits a second value of brightness when receiving the second common potential, and the second value of brightness of the second sub-pixel and the second common potential have a concave function relationship. ### Claim 3 (depends on 1) The display device according to claim 1, wherein when the grey levels displayed by the first sub-pixel and the second sub-pixel are 96, 128, or 180, the potential difference between the first common potential received by the first sub-pixel having the maximum brightness and the second common potential received by the second sub-pixel having the minimum brightness is in the range of about 0 mV to 100 mV. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the display device further comprises a common electrode, the common electrode is disposed on the first substrate, and the common electrode corresponds respectively to the first pixel electrode of the first sub-pixel and the second pixel electrode of the second sub-pixel. ### Claim 5 A display device, comprising: a first substrate; a second substrate; a display medium, disposed between the first substrate and the second substrate, a plurality of sub-pixel units being defined on the first substrate and the second substrate, and at least one of the sub-pixel units having at least one first sub-pixel and at least one second sub-pixel; a first pixel electrode, disposed on the first substrate and corresponding to the first sub-pixel; a second pixel electrode, disposed on the first substrate and corresponding to the second sub-pixel, and the second pixel electrode being separated from the first pixel electrode; and a transparent electrode, disposed on the second substrate, the transparent electrode corresponding respectively to the first pixel electrode of the first sub-pixel and the second pixel electrode of the second sub-pixel, and the transparent electrode receiving a first common potential and a second common potential, wherein when grey levels displayed by the first sub-pixel and the second sub-pixel are in a range of about 96 to 180, and the first sub-pixel and the second sub-pixel respectively have a first flicker value and a second flicker value, a potential difference between the first common potential corresponding to the first flicker value and the second common potential corresponding to the second flicker value is in a range of about −100 mV to 1 V. ### Claim 6 (depends on 5) The display device according to claim 5, wherein the first sub-pixel exhibits a first value of brightness when receiving the first common potential, and the first value of brightness of the first sub-pixel and the first common potential have a concave function relationship; the second sub-pixel exhibits a second value of brightness when receiving the second common potential, and the second value of brightness of the second sub-pixel and the second common potential have a convex function relationship. ### Claim 7 (depends on 5) The display device according to claim 5, wherein the first flicker value is generated according to a first value of brightness exhibited by the first sub-pixel receiving the first common potential, the second flicker value is generated according to a second value of brightness exhibited by the second sub-pixel receiving the second common potential, and the second common potential corresponding to the second flicker value is greater than the first common potential corresponding to the first flicker value. ### Claim 8 (depends on 6) The display device according to claim 6, wherein the first flicker value is generated according to the first value of brightness exhibited by the first sub-pixel receiving the first common potential, the second flicker value is generated according to the second value of brightness exhibited by the second sub-pixel receiving the second common potential, and the second common potential corresponding to the second flicker value is greater than the first common potential corresponding to the first flicker value. ### Claim 9 (depends on 5) The display device according to claim 5, wherein the potential difference between the first common potential corresponding to the first flicker value and the second common potential corresponding to the second flicker value is in a range of about 100 mV to 1 V. ### Claim 10 (depends on 5) The display device according to claim 5, wherein when the grey levels displayed by the first sub-pixel and the second sub-pixel are 96, 128, or 180, the potential difference between the first common potential corresponding to the first flicker value and the second common potential corresponding to the second flicker value is in a range of about 100 mV to 1 V. ### Claim 11 (depends on 6) The display device according to claim 6, wherein when the grey levels displayed by the first sub-pixel and the second sub-pixel are 96, 128, or 180, the potential difference between the first common potential corresponding to the first flicker value and the second common potential corresponding to the second flicker value is in a range of about 100 mV to 1 V. ### Claim 12 (depends on 5) The display device according to claim 5, wherein the first flicker value is substantially equal to the second flicker value. ### Claim 13 (depends on 5) The display device according to claim 5, wherein the first flicker value is different from the second flicker value. ### Claim 14 (depends on 5) The display device according to claim 5, wherein the first flicker value and the second flicker value are respectively a minimum flicker value of the first sub-pixel and a minimum flicker value of the second sub-pixel. ### Claim 15 (depends on 5) The display device according to claim 5, wherein the display device further comprises a common electrode, the common electrode is disposed on the first substrate, and the common electrode corresponds respectively to the first pixel electrode of the first sub-pixel and the second pixel electrode of the second sub-pixel. ### Claim 16 (depends on 5) The display device according to claim 5, wherein a value of brightness per unit area of the first sub-pixel is greater than a value of brightness per unit area of the second sub-pixel. ### Claim 17 (depends on 5) The display device according to claim 5, wherein the potential difference is obtained by subtracting the first common potential corresponding to the first flicker value from the second common potential corresponding to the second flicker value and is in a range of about 100 mV to 1 V, and the first flicker value and the second flicker value are respectively a minimum flicker value of the first sub-pixel and a minimum flicker value of the second sub-pixel. ### Claim 18 (depends on 17) The display device according to claim 17, wherein the gray levels displayed by the first sub-pixel and the second sub-pixel are in the range of about 96 to 180.