# US 8,542,168 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 8,542,168 B2 - Document ID: US8542168B2 - Status: Granted - Kind: B2 - Application number: 11/857,474 - Filed: 2007-09-19 - Published: 2008-03-20 - Granted: 2013-09-24 - Earliest claimed: 2006-09-19 - Assignees: Hitachi Displays, Ltd.; Panasonic Liquid Crystal Display Co., Ltd. - Applicants: Ikuko Mori; Kikuo Ono - Inventors: Ikuko Mori; Kikuo Ono - Web page: https://patentgrep.com/patent/US8542168B2 ## CPC - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 3/2081: {with combination of amplitude modulation and time modulation (space and time error diffusion G09G3/2066)} - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - G09G 2310/0205: Simultaneous scanning of several lines in flat panels - G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage - G09G 2320/0252: Improving the response speed - G09G 2320/0261: in the context of movement of objects on the screen or movement of the observer relative to the screen - G09G 2340/0435: Change or adaptation of the frame rate of the video stream - 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 The present invention provides a display method realizing reduction in a moving picture blurring by forming one frame by two fields of different luminance, in which increase in an unapplied voltage due to shortening of data voltage write time is suppressed. A gate voltage is applied in a light field for a period of time which is twice as long as scan line selection time, thereby decreasing an unapplied voltage. On the other hand, a gate voltage is applied normally in a dark field for the scan line selection time, so that the case where the unapplied voltage increases is eliminated. As a result, an image with high reproducibility can be obtained. ## Claims ### Claim 1 A display device comprising a number of pixels formed in a matrix and surrounded by a plurality of data signal lines extended in a vertical direction and arranged in a lateral direction and a plurality of scan lines extended in the lateral direction and arranged in the vertical direction, a scan line being selected by application of a gate voltage to the scan line, and a pixel voltage being supplied to pixels from a data signal line, wherein: data of three fields is generated from input image data of one frame, said one frame including said three fields, the three fields comprising a field of relatively high luminance, a field of intermediate luminance, and a field of relatively low luminance; the scan line is selected in a first period using a single-pulse writing, and the scan line is selected in a second period using a double-pulse wiring, wherein the second period is twice as long as the first period, at the time of generating an image of the field of relatively high luminance, a scan line connected to the pixel is selected using the double-pulse writing in one field; and at the time of generating an image of the field of relatively low luminance, the scan line connected to the pixel is selected using the single-pulse writing in one field. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the display device is a hold-response-type display device that holds display of tone for a predetermined period. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the display device is a liquid crystal display device. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the display device is an organic EL display device. ### Claim 5 (depends on 1) The display device according to claim 1, wherein when the field of intermediate luminance follows the field of relatively high luminance, the scan line connected to the pixels is selected once in one field. ### Claim 6 (depends on 1) The display device according to claim 1, wherein when the field of intermediate luminance follows the field of relatively low luminance, a scan line connected to the pixels is selected twice in a row in one field. ### Claim 7 A display device comprising a number of pixels formed in a matrix and surrounded by a plurality of data signal lines extended in a vertical direction and arranged in a lateral direction and a plurality of scan lines extended in the lateral direction and arranged in the vertical direction, a scan line being selected by application of a gate voltage to the scan line, and a pixel voltage being supplied to pixels from a data signal line, wherein: data of three fields is generated from input image data of one frame, said one frame including said three fields, the three fields comprising a field of relatively high luminance, a field of intermediate luminance, and a field of relatively low luminance; the scan line is selected in a first period using a single-pulse writing, and the scan line is selected in a second period using a double-pulse wiring, wherein the second period is twice as long as the first period, at the time of generating an image of the field of relatively high luminance, two kinds of image voltages are supplied successively from a data signal line to pixels using the double-pulse writing in one field; and at the time of generating an image of the field of relatively low luminance, one kind of image voltage is supplied from a data signal line to the pixels using the single-pulse writing in one field. ### Claim 8 (depends on 7) The display device according to claim 7, wherein when the field of intermediate luminance follows the field of relatively high luminance, two kinds of image voltages are supplied successively from a data signal line to the pixels in one field. ### Claim 9 (depends on 7) The display device according to claim 7, wherein when the field of intermediate luminance follows the field of relatively low luminance, two kinds of image voltages are supplied successively from a data signal line to the pixels in one field. ### Claim 10 (depends on 7) The display device according to claim 7, wherein the display device is a hold-response-type display device that holds display of tone for a predetermined period. ### Claim 11 (depends on 7) The display device according to claim 7, wherein the display device is a liquid crystal display device. ### Claim 12 (depends on 7) The display device according to claim 7, wherein the display device is an organic EL display device. ### Claim 13 A display device comprising a number of pixels formed in a matrix and surrounded by a plurality of data signal lines extended in a vertical direction and arranged in a lateral direction and a plurality of scan lines extended in the lateral direction and arranged in the vertical direction, a scan line being selected by application of a gate voltage to the scan line, and a pixel voltage being supplied to pixels from a data signal line, wherein: the display device is configured to form a plurality of frames, each frame including four or more fields, and, in the case where data of four or more fields of different luminance including a field of maximum luminance and a field of minimum luminance is generated from input image data of one of the frames, and an image is formed by the four or more fields, in a method of driving a specific one of the fields, when two of the frames are successively selected, the scan line is selected in a first period using a single-pulse writing, and the scan line is selected in a second period using a double-pulse wiring, wherein the second period is twice as long as the first period; if a field of luminance lower than that of the specific field is sent before the specific field, a scan line connected to pixels is selected using the double-pulse writing in one field in the specific field; and when a field having luminance higher than that of the specific field is set before the specific field, a scan line connected to pixels in the specific field is selected using the single-pulse writing in one field. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the display device is a hold-response-type display device that holds display of tone for a predetermined period. ### Claim 15 (depends on 13) The display device according to claim 13, wherein the display device is a liquid crystal display device. ### Claim 16 (depends on 13) The display device according to claim 13, wherein the display device is an organic EL display device.