# US 10,770,021 B2 · Display device and driving method of the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,021 B2 - Document ID: US10770021B2 - Status: Granted - Kind: B2 - Application number: 15/991,258 - Filed: 2018-05-29 - Published: 2018-11-29 - Granted: 2020-09-08 - Earliest claimed: 2017-05-29 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: YooJin Kang; SungJin Kim - Web page: https://patentgrep.com/patent/US10770021B2 ## CPC - G09G 3/3688: {suitable for active matrices only} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - G09G 3/003: {to produce spatial visual effects} - G09G 3/3275: Details of drivers for data electrodes - G09G 3/3611: {Control of matrices with row and column drivers} - G09G 5/14: Display of multiple viewports - H10D 86/441: {Interconnections, e.g. scanning lines} - H10D 86/60: wherein the TFTs are in active matrices - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - G09G 2310/0275: Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current - G09G 2320/0271: Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping - G09G 2320/0285: using tables for spatial correction of display data - 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 - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract The present disclosure relates to a display device and a driving method of a display device. The display device includes a display panel including a first display area and a second display area; a data correcting unit which is applied with n-bit input image data to generate (n-a)-bit corrected image data; a timing control unit which is applied with the (n-a)-bit corrected image data to generate (n-a)-bit output image data; and a data driving unit which is applied with the (n-a)-bit output image data to output a first data voltage to a first pixel disposed in the first display area and output a second data voltage to a second pixel which is disposed in the second display area and corresponds to the first pixel. Therefore, corrected image data which has a lower bit number than that of input image data is used to express the same color depth as a color depth which is expressed by the input image data so that the size of the data is reduced and the data amount processed by the timing control unit and the data driver is reduced. Therefore, the processing speed of the timing control unit and the data driver may be improved. ## Claims ### Claim 1 A display device comprising: a display panel including a first display area and a second display area; a data correcting unit which receives n-bit input image data and generates (n-a)-bit corrected image data; a timing control unit which receives the (n-a)-bit corrected image data and generates (n-a)-bit output image data; and a data driver which receives the (n-a)-bit output image data and outputs a first data voltage to a first pixel disposed in the first display area and outputs a second data voltage to a second pixel which is disposed in the second display area at a position that corresponds to a position of the first pixel in the first display area, wherein a gray scale of the first pixel and a gray scale of the second pixel are the same or are different by one gray scale, n is a natural number and a is a natural number which is smaller than n, wherein the data correcting unit includes: a data processing unit which divides the n-bit input image data and extracts upper (n-a)-bit first corrected data and lower a-bit second corrected data; a frame determining unit which generates a frame signal representing an order of 2{circumflex over ( )}a frames; a position determining unit which generates a position signal determining a position where the (n-a)-bit corrected image data is output; and a data output unit which converts the first corrected data based on the second corrected data, the frame signal, and the position signal, and outputs the corrected image data to the timing control unit, and wherein the data output unit performs both eye gray scale mixing through the first display area and the second display area using the position signal and performs a temporal gray scale mixing within the 2{circumflex over ( )}a frames using the frame signal. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the corrected image data is obtained by combining the first corrected data and a data obtained by adding 1 to the first corrected data. ### Claim 3 (depends on 2) The display device according to claim 2, wherein an average of the corrected image data is a sum of the first corrected data and the second corrected data*(1/(2{circumflex over ( )}a)), during the 2{circumflex over ( )}a frames. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the frame signal is any integer from 1 to 2{circumflex over ( )}a. ### Claim 5 (depends on 1) The display device according to claim 1, wherein when the position signal is a low level, the corrected image data to be output to the first pixel is generated and when the position signal is a high level, the corrected image data to be output to the second pixel is generated. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the data correcting unit further includes: an image analyzing unit which outputs a high level image change signal to the frame determining unit when a difference between an input image data of a previous frame and an input image data of a current frame is equal to or higher than a threshold data. ### Claim 7 (depends on 6) The display device according to claim 6, wherein when the high level image change signal is applied, the frame determining unit initializes the frame signal. ### Claim 8 (depends on 7) The display device according to claim 7, wherein when the frame signal is initialized, the data output unit re-recognizes the first corrected data and combines the re-recognized first corrected data and a data obtained by adding 1 to the re-recognized first corrected data to output corrected image data. ### Claim 9 (depends on 1) The display device according to claim 1, wherein n is 10 and a is 2 or 3. ### Claim 10 (depends on 1) The display device according to claim 1, wherein in the first display area, an image output to a left eye of a viewer is displayed and in the second display area, an image output to a right eye of the viewer is displayed. ### Claim 11 A driving method of a display device including a first display area and a second display area, comprising: receiving n-bit input image data; dividing the n-bit input image data to extract upper (n-a)-bit first corrected data and lower a-bit second corrected data; determining an order of 2{circumflex over ( )}a frames; determining a position where corrected image data is to be output; and converting the first corrected data based on the second corrected data, a frame signal, and a position signal, and outputting the corrected image data, wherein the corrected image data is generated by combining the first corrected data and a data obtained by adding 1 to the first corrected data and n is a natural number and a is a natural number which is smaller than n, and wherein both eye gray scale mixing is performed through the first display area and the second display area using the position signal and a temporal gray scale mixing is performed within the 2{circumflex over ( )}a frames using the frame signal during the converting the first corrected data. ### Claim 12 (depends on 11) The driving method according to claim 11, wherein an average of the corrected image data is a sum of the first corrected data and the second corrected data*(1/(2{circumflex over ( )}a)), during the 2{circumflex over ( )}a frames. ### Claim 13 (depends on 11) The driving method according to claim 11, further comprising: prior to the determining an order of frames, analyzing the input image data to detect that a difference between an input image data of a previous frame and an input image data of a current frame is equal to or larger than a threshold data. ### Claim 14 (depends on 13) The driving method according to claim 13, wherein during the analyzing of the input image data, when the difference between the input image data is equal to or higher than a threshold data, the determining of an order of frames is initialized. ### Claim 15 (depends on 14) The driving method according to claim 14, wherein during the outputting of corrected image data, when the frame signal is initialized, the first corrected data is re-recognized and the re-recognized first corrected data and a data obtained by adding 1 to the re-recognized first corrected data are combined to output corrected image data. ### Claim 16 (depends on 11) The driving method according to claim 11, wherein n is 10 and a is 2 or 3.