# US 8,786,934 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 8,786,934 B2 - Document ID: US8786934B2 - Status: Granted - Kind: B2 - Application number: 13/168,025 - Filed: 2011-06-24 - Published: 2011-12-29 - Granted: 2014-07-22 - Earliest claimed: 2010-06-25 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Hajime Kimura - Inventors: Hajime Kimura - Web page: https://patentgrep.com/patent/US8786934B2 ## CPC - G02F 1/167: by electrophoresis - G02F 1/1676: Electrodes - G02F 1/16766: for active matrices - G09G 3/34: by control of light from an independent source - G09G 3/3446: {with more than two electrodes controlling the modulating element} - G02F 2201/123: pixel - G09G 2310/0272: Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current - 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 - 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 In a device for displaying images by application of an electric field to a charged substance, a structure for reducing afterimages and a method for manufacturing the structure are provided. The device is a display device which includes a plurality of pixel electrodes and a charged layer (a layer including a charged substance) provided over the pixel electrodes. An end of one of two pixel electrodes that are adjacent to each other among the plurality of pixel electrodes has a depression in an end-face direction, and an end of the other of the pixel electrodes has a projection in the end-face direction. In a state in which the depression and the projection are in a set, a gap is formed between the two pixel electrodes. ## Claims ### Claim 1 A display device comprising: a first driver circuit; a second driver circuit; a plurality of first wirings electrically connected to the first driver circuit; a plurality of second wirings electrically connected to the second driver circuit; a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and a layer including a charged substance, the layer provided over the plurality of pixel electrodes, wherein at least one end of two pixel electrodes adjacent to each other among the plurality of pixel electrodes includes a curved portion in an end-face direction. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the layer including the charged substance includes a plurality of microcapsules. ### Claim 3 (depends on 2) The display device according to claim 2, wherein each of the plurality of microcapsules includes colored particles. ### Claim 4 (depends on 1) The display device according to claim 1, further comprising a counter electrode over the layer including the charged substance. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the display device is a passive matrix display device. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the display device is an active matrix display device. ### Claim 7 A display device comprising: a first driver circuit; a second driver circuit; a plurality of first wirings electrically connected to the first driver circuit; a plurality of second wirings electrically connected to the second driver circuit; a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and a layer including a charged substance, the layer provided over the plurality of pixel electrodes, wherein between two pixel electrodes adjacent to each other among the plurality of pixel electrodes, an end of one of the plurality of pixel electrodes includes a depression in an end-face direction, wherein an end of the other of the plurality of pixel electrodes includes a projection in the end-face direction, and wherein in a state in which the depression of the one of the plurality of pixel electrodes and the projection of the other of the plurality of pixel electrodes are in a set, a gap is formed between the two pixel electrodes. ### Claim 8 (depends on 7) The display device according to claim 7, wherein the layer including the charged substance includes a plurality of microcapsules. ### Claim 9 (depends on 8) The display device according to claim 8, wherein each of the plurality of microcapsules includes colored particles. ### Claim 10 (depends on 7) The display device according to claim 7, further comprising a counter electrode over the layer including the charged substance. ### Claim 11 (depends on 7) The display device according to claim 7, wherein the display device is a passive matrix display device. ### Claim 12 (depends on 7) The display device according to claim 7, wherein the display device is an active matrix display device. ### Claim 13 A display device comprising: a first driver circuit; a second driver circuit; a plurality of first wirings electrically connected to the first driver circuit; a plurality of second wirings electrically connected to the second driver circuit; a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and a layer including a charged substance, the layer provided over the plurality of pixel electrodes, wherein a gap is formed between two pixel electrodes adjacent to each other among the plurality of pixel electrodes, wherein the gap includes three or more portions whose distances are equal to each other, and wherein in the three or more portions, when middle points of the distances are linked in a line, the line has one or more vertexes. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the layer including the charged substance includes a plurality of microcapsules. ### Claim 15 (depends on 14) The display device according to claim 14, wherein each of the plurality of microcapsules includes colored particles. ### Claim 16 (depends on 13) The display device according to claim 13, further comprising a counter electrode over the layer including the charged substance. ### Claim 17 (depends on 13) The display device according to claim 13, wherein the display device is a passive matrix display device. ### Claim 18 (depends on 13) The display device according to claim 13, wherein the display device is an active matrix display device. ### Claim 19 A display device comprising: a first driver circuit; a second driver circuit; a plurality of first wirings electrically connected to the first driver circuit; a plurality of second wirings electrically connected to the second driver circuit; a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and a layer including a charged substance, the layer provided over the plurality of pixel electrodes, wherein between two pixel electrodes adjacent to each other among the plurality of pixel electrodes, at least one end of the two pixel electrodes is curved and a gap is formed, and wherein the gap includes three or more portions whose distances are equal to each other. ### Claim 20 (depends on 19) The display device according to claim 19, wherein the layer including the charged substance includes a plurality of microcapsules. ### Claim 21 (depends on 20) The display device according to claim 20, wherein each of the plurality of microcapsules includes colored particles. ### Claim 22 (depends on 19) The display device according to claim 19, further comprising a counter electrode over the layer including the charged substance. ### Claim 23 (depends on 19) The display device according to claim 19, wherein the display device is a passive matrix display device. ### Claim 24 (depends on 19) The display device according to claim 19, wherein the display device is an active matrix display device. ### Claim 25 A display device comprising: a first driver circuit; a second driver circuit; a plurality of first wirings electrically connected to the first driver circuit; a plurality of second wirings electrically connected to the second driver circuit; a plurality of pixel electrodes, each pixel electrode overlapping with an intersection of one of the plurality of first wirings and one of the plurality of second wirings; and a layer including a charged substance, the layer provided over the plurality of pixel electrodes, wherein a right end of a first pixel electrode in the plurality of pixel electrodes and a left end of a second pixel electrode adjacent to a right side of the first pixel electrode are curved and a first gap is formed between the first pixel electrode and the second pixel electrode, wherein an upper end of the first pixel electrode and a lower end of a third pixel electrode adjacent to an upper side of the first pixel electrode are curved and a second gap is formed between the first pixel electrode and the third pixel electrode, and wherein the first gap and the second gap include two or more portions whose distances are equal to each other. ### Claim 26 (depends on 25) The display device according to claim 25, wherein the layer including the charged substance includes a plurality of microcapsules. ### Claim 27 (depends on 26) The display device according to claim 26, wherein each of the plurality of microcapsules includes colored particles. ### Claim 28 (depends on 25) The display device according to claim 25, further comprising a counter electrode over the layer including the charged substance. ### Claim 29 (depends on 25) The display device according to claim 25, wherein the display device is a passive matrix display device. ### Claim 30 (depends on 25) The display device according to claim 25, wherein the display device is an active matrix display device.