# US 10,482,802 B2 · Display apparatus having a shift driving mode and method of testing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,482,802 B2 - Document ID: US10482802B2 - Status: Granted - Kind: B2 - Application number: 15/454,718 - Filed: 2017-03-09 - Published: 2018-02-01 - Granted: 2019-11-19 - Earliest claimed: 2016-07-29 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Seonmi Kim; Changsin Kim; Changgil Oh - Web page: https://patentgrep.com/patent/US10482802B2 ## CPC - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/3677: {suitable for active matrices only} - G09G 3/3685: {Details of drivers for data electrodes} - G09G 3/3688: {suitable for active matrices only} - G09G 2310/0267: Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/0297: Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - 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 A display apparatus includes a display panel configured to display an image. The display panel includes a plurality of gate lines and a plurality of data lines. A gate driving part is configured to output gate signals to the plurality of gate lines. A data driving part includes a plurality of channels configured to output data signals to the plurality of data lines. The plurality of channels is further configured to shift the data signals by M channel, where M is a positive integer, according to a driving mode selection signal for selecting a driving mode of the display panel. ## Claims ### Claim 1 A display apparatus comprising: a display panel configured to display an image, and the display panel including a plurality of gate lines and a plurality of data lines; a gate driving part configured to output gate signals to the plurality of gate lines; and a data driving part comprising a plurality of channels configured to output data signals to the plurality of data lines, and the plurality of channels further configured to shift the data signals by M channel, where M is a positive integer, according to a driving mode selection signal for selecting a driving mode of the display panel, wherein in shifting the data signals by M channels, a connection between each data signal of the plurality of data signals to each original channel of the plurality of channels is changed so as to connect each data signal of the plurality of data signals to a different channel of the plurality of channels that is spaced apart from the original channel of the plurality of channels by the M channels, wherein the display apparatus further includes a plurality of normal driving switches, each of which is disposed along a corresponding data line of the plurality of data lines, and each of the plurality of normal driving switches being configured to maintain a connection between the corresponding data line and a corresponding original channel of the plurality of channels when the driving mode is a normal driving mode and to interrupt the connection between the corresponding data line and the corresponding original channel of the plurality of channels when the driving mode is a shift driving mode, and wherein the display apparatus further includes a plurality of shift driving switches each of which is disposed between a pair of corresponding data lines of the plurality of data lines, and each of the plurality of shift driving switches being configured to maintain a connection between the pair of corresponding data lines when the driving mode is the shift driving mode and to interrupt the connection between the pair of corresponding data lines when the driving mode is the normal driving mode. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein the data driving part outputs the data signals to the plurality of data lines, respectively, when the driving mode selection signal is at a first level. ### Claim 3 (depends on 2) The display apparatus of claim 2, wherein the data driving part shifts the data signals by M channel when the driving mode selection signal is at a second level that is different from the first level. ### Claim 4 A display apparatus comprising: a display panel configured to display an image, and the display panel including a plurality of gate lines and a plurality of data lines; a gate driving part configured to output gate signals to the plurality of gate lines; and a data driving part comprising a plurality of channels configured to output data signals to the plurality of data lines, and the plurality of channels further configured to shift the data signals by M channel, where M is a positive integer, according to a driving mode selection signal for selecting a driving mode of the display panel, wherein the data driving part comprises first to N-th channels, wherein N is an integer greater than M, and the data driving part is configured to output first to N-th data signals of the data signals, and the data driving part is further configured to output the first to N-th data signals to first to N-th data lines of the plurality of data lines when the driving mode selection signal is at a first level. ### Claim 5 (depends on 4) The display apparatus of claim 4, wherein the data driving part outputs first to (N−1)-th data signals to second to N-th data lines of the data lines, respectively, when the driving mode selection signal is at a second level that is different than the first level. ### Claim 6 (depends on 5) The display apparatus of claim 5, wherein the data driving part shifts the first to (N−1)-th data signals in a direction in which the first to N-th data lines are sequentially arranged. ### Claim 7 (depends on 4) The display apparatus of claim 4, wherein the data driving part outputs first to (N−2)-th data signals, where N is an integer greater than M, to third to N-th data lines of the data lines, respectively, when the driving mode selection signal is at a second level that is different from the first level. ### Claim 8 (depends on 4) The display apparatus of claim 4, wherein the data driving part outputs N-th to second data signals, where N is an integer greater than M, to (N−1)-th to first data lines of the plurality of data lines, respectively, when the driving mode selection signal is at a second level that is different from the first level. ### Claim 9 (depends on 8) The display apparatus of claim 8, wherein the data driving part shifts the N-th to second data signals in a direction opposite to a direction in which the first to N-th data lines are sequentially arranged. ### Claim 10 A display apparatus comprising: a display panel configured to display an image, and the display panel including a plurality of gate lines and a plurality of data lines; a gate driving part configured to output gate signals to the plurality of gate lines; and a data driving part comprising a plurality of channels configured to output data signals to the plurality of data lines, and the plurality of channels further configured to shift the data signals by M channel, where M is a positive integer, according to a driving mode selection signal for selecting a driving mode of the display panel, wherein the data driving part comprises: first to N-th channels configured to output first to N-th data signals of the data lines, where N is an integer greater than M; and normal driving switches disposed on the first to N-th channels, respectively, and configured to connect or disconnect the first to N-th channels. ### Claim 11 (depends on 10) The display apparatus of claim 10, wherein the data driving part further comprises shift driving switches disposed between first to (N−1)-th channels of the first to N-th channels, and second to N-th channels of the first to N-th channels, respectively. ### Claim 12 (depends on 11) The display apparatus of claim 11, wherein the data driving part further comprises: a driving mode selection line configured to transfer the driving mode selection signal; and inverters disposed between the driving mode selection line and each of the shift driving switches. ### Claim 13 (depends on 12) The display apparatus of claim 12, wherein the normal driving switches are configured to be closed and the shift driving switches are configured to be opened when the driving mode selection signal is at a first level. ### Claim 14 (depends on 13) The display apparatus of claim 13, wherein the normal driving switches are configured to be opened and the shift driving switches are configured to be closed when the driving mode selection signal is at a second level that is different from the first level. ### Claim 15 A method of testing a display apparatus, the method comprising: operating a data driving part of a display panel in a normal driving mode in which data signals are output to data lines of the display panel configured to display an image; operating the data driving part of the display panel in a shift driving mode in which the data signals are shifted by M channel prior to outputting the data signals, where M is a positive integer; and determining whether a defect present in the image displayed on the display panel is due to a fault of the display panel or is due to a fault of the data driving part which outputs the data signals to the display panel. ### Claim 16 (depends on 15) The method of claim 15, wherein, when the defect present in the image displayed on the display panel is determined to be due to the fault of the display panel, a position of the defect in the image does not change when the data driving part switches between the normal driving mode and the shift driving mode, and when the defect present in the image displayed on the display panel is determined to be due to the fault of the data driving part, the position of the defect in the image changes when the data driving part switches between the normal driving mode and the shift driving mode. ### Claim 17 A method for testing a display apparatus, comprising: operating a data driver of the display apparatus in a first mode in which data signals are provided to data lines of the display apparatus with a first correspondence; determining a first location of a defect displayed in the display apparatus while operating the data driver in the first mode; operating the data driver of the display apparatus in a second mode in which the data signals are provided to the data lines of the display apparatus with a second correspondence that is different from the first correspondence; determining a second location of the defect displayed in the display apparatus while operating the data driver in the second mode; and determining whether a fault is present in the data driver or a display panel of the display apparatus based on whether the first location and the second location are identical to each other. ### Claim 18 (depends on 17) The method of claim 17, wherein it is determined that the fault is present in the data driver when the first location and the second location are different from each other and wherein it is determined that the fault is present in the display panel when the first location and the second location are identical to each other. ### Claim 19 (depends on 17) The method of claim 17, wherein the first correspondence connects a plurality of channels of the data driver with a plurality of data lines of the data lines, and the second correspondence changes the channel of the plurality of channels that each data line of the plurality of data lines is connected to. ### Claim 20 (depends on 19) The method of claim 19, wherein the second correspondence shifts the channel of the plurality of channels that each data line of the plurality of data lines is connected to by a number of channel M, where M is a positive integer.