# US 2017/0287438 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0287438 A1 - Document ID: US20170287438A1 - Status: Published application - Kind: A1 - Application number: 15/471,562 - Filed: 2017-03-28 - Published: 2017-10-05 - Earliest claimed: 2016-03-31 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Kojiro Ikeda; Masaaki Kabe; Akira Sakaigawa - Web page: https://patentgrep.com/patent/US20170287438A1 ## CPC - G09G 5/10: Intensity circuits - G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)} - G09G 3/2074: {using sub-pixels} - G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 3/2011: {by amplitude modulation} - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2320/02: Improving the quality of display appearance - 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 According to an aspect, a display device includes: a display panel including a plurality of pixels; at least three of a first sub-pixel in a first color, a second sub-pixel in a second color, a third sub-pixel in a third color, and a fourth sub-pixel in a fourth color, the three sub-pixels being included in each of the pixels; and a controller configured to input an input signal to the first sub-pixel to the fourth sub-pixel. When display is performed in a plurality of display regions in respective single colors adjacent to each other in the display panel, the controller inputs a signal for lighting a sub-pixel that does not contribute to one of the single colors in a halftone manner, in a pixel included in a boundary section of the adjacent display regions. ## Claims ### Claim 1 A display device comprising: a display panel including a plurality of pixels; at least three of a first sub-pixel in a first color, a second sub-pixel in a second color, a third sub-pixel in a third color, and a fourth sub-pixel in a fourth color, the three sub-pixels being included in each of the pixels; and a controller configured to input an input signal to the first sub-pixel to the fourth sub-pixel, wherein, when display is performed in a plurality of display regions in respective single colors adjacent to each other in the display panel, the controller inputs a signal for lighting a sub-pixel that does not contribute to one of the single colors in a halftone manner, in a pixel included in a boundary section of the adjacent display regions. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the controller inputs a signal for lighting a sub-pixel that contributes to one of the single colors in a halftone manner, in the pixel included in the boundary section of the adjacent display regions. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the controller inputs a signal for fully lighting a sub-pixel that contributes to one of the single colors, and a signal for lighting a sub-pixel that does not contribute to one of the single colors and that displays white, in a halftone manner, in the pixel included in the boundary section of the adjacent display regions. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the controller inputs a signal for lighting a sub-pixel in a halftone manner, in only one display region of the adjacent display regions in the boundary section. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the single colors displayed in the display regions are primary colors. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the single colors displayed in the display regions are complementary colors of primary colors. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the single colors displayed in the display regions are a primary color and a complementary color of the primary color. ### Claim 8 (depends on 1) The display device according to claim 1, wherein the boundary section of one of the display regions is on a pixel row or a pixel column closest to another one of the display regions adjacent and closest to the one of the display regions. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel have a same shape and a same area, and the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are arranged in one of the pixels such that the first sub-pixel and the second sub-pixel are adjacent to each other in a first direction, the third sub-pixel and the fourth sub-pixel are adjacent to each other in the first direction, the first sub-pixel and the third sub-pixel are adjacent to each other in a second direction perpendicular to the first direction, and the second sub-pixel and the fourth sub-pixel are adjacent to each other in the second direction. ### Claim 10 (depends on 1) The display device according to claim 1, wherein the pixels include a plurality of first pixels, and a plurality of second pixels, each of the first pixels including the first sub-pixel, the second sub-pixel, and the third sub-pixel, and each of the second pixels including the first sub-pixel, the second sub-pixel, and the fourth sub-pixel, the first pixels and the second pixels are alternately arranged in a first direction, and the first pixels and the second pixels are alternately arranged in a second direction different from the first direction, the first sub-pixel and the second sub-pixel have a same shape and a same area, the third sub-pixel and the fourth sub-pixel have a larger area than the first sub-pixel, in each of the first pixels, the first sub-pixel and the third sub-pixel are adjacent to each other in the first direction, the second sub-pixel and the third sub-pixel are adjacent to each other in the first direction, and the first sub-pixel and the second sub-pixel are adjacent to each other in the second direction, and in each of the second pixels, the first sub-pixel and the fourth sub-pixel are adjacent to each other in the first direction, the second sub-pixel and the fourth sub-pixel are adjacent to each other in the first direction, and the first sub-pixel and the second sub-pixel are adjacent to each other in the second direction. ### Claim 11 (depends on 1) The display device according to claim 1, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel have a same shape and a same area, and the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are arranged in a first direction. ### Claim 12 A method of driving a display device including a display panel including a plurality of pixels, and at least three of a first sub-pixel in a first color, a second sub-pixel in a second color, a third sub-pixel in a third color, and a fourth sub-pixel in a fourth color, the three sub-pixels being included in each of the pixels, the method comprising: when display is performed in a plurality of display regions in respective single colors adjacent to each other in the display panel, inputting a signal for lighting a sub-pixel that does not contribute to one of the single colors in a halftone manner, in a pixel included in a boundary section of the adjacent display regions.