# US 10,769,972 B2 · Display driving device having test function and display device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,769,972 B2 - Document ID: US10769972B2 - Status: Granted - Kind: B2 - Application number: 16/351,933 - Filed: 2019-03-13 - Published: 2019-09-19 - Granted: 2020-09-08 - Earliest claimed: 2018-03-14 - Assignees: Silicon Works Co., Ltd. - Applicants: Silicon Works Co., Ltd. - Inventors: Young Gi Kim - Web page: https://patentgrep.com/patent/US10769972B2 ## 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 2310/06: Details of flat display driving waveforms - 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 device having a test function includes a display panel; and a display driving device configured to store pattern data corresponding to test patterns for testing an image quality of the display panel and control data for controlling the pattern data. The display driving device sets a display order and a display time of each of the test patterns by using the control data, and performs driving such that at least two test patterns are displayed on the display panel depending on the control data. ## Claims ### Claim 1 A display device having a test function, comprising: a display panel; and a display driving device for driving the display panel, where the display driving device comprises: a storage unit configured to store pattern data corresponding to test patterns for testing an image quality of the display panel and control data for controlling the pattern data; a data driving circuit configured to provide a source signal corresponding to the pattern data, to the display panel; a control circuit configured to set a display order and a display time of each of the test patterns by using the control data, and control the data driving circuit such that at least two test patterns are displayed on the display panel depending on the control data; and a pattern generation circuit configured to receive a command signal, and generate the pattern data by designating at least one among regions of the test patterns and colors, gradations and gradation stages for the regions, in correspondence to the command signal, wherein the command signal comprises commands for designating a plurality of pattern generators, regions of the test patterns and colors for the regions. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the display driving device receives a test signal, and performs control such that the test patterns are displayed on the display panel depending on the control data when the test signal is enabled. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the display driving device receives setting signals, and sets at least one among a display order, a display time, a frame frequency, a size, a shape, a color and a structure of each of the test patterns by changing the control data depending on the setting signals. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the control circuit sets at least one among a display order, a display time, a frame frequency, a size, a shape, a color and a structure of each of the test patterns by changing the control data depending on setting signals. ### Claim 5 (depends on 4) The display device according to claim 4, wherein the control circuit receives a test signal, reads the pattern data and the control data from the storage circuit when the test signal is enabled, and controls the data driving circuit such that the test patterns are displayed on the display panel depending on the control data. ### Claim 6 (depends on 4) The display device according to claim 4, wherein the control circuit receives the setting signals, and sets a display order, a display time, a frame frequency, a size, a shape, a color and a structure of each of the test patterns by changing the control data depending on the setting signals. ### Claim 7 (depends on 1) The display device according to claim 1, further comprising: a clock generation circuit configured to receive a test signal and provide a clock signal to the control circuit when the test signal is enabled. ### Claim 8 (depends on 7) The display device according to claim 7, wherein the control circuit provides an input signal which includes the clock signal, the pattern data and the control data, to the data driving circuit when the test signal is enabled. ### Claim 9 A display driving device having a test function, comprising: a storage circuit configured to store pattern data corresponding to test patterns for testing an image quality of a display panel and control data for controlling the pattern data; a data driving circuit configured to provide a source signal corresponding to the pattern data, to the display panel; a control circuit configured to set a display order and a display time of each of the test patterns by using the control data, and control the data driving circuit such that at least two test patterns are displayed on the display panel depending on the control data when testing an image quality of the display panel; and a pattern generation circuit configured to receive a command signal, and generate the pattern data by designating at least one among regions of the test patterns and colors, gradations and gradation stages for the regions, in correspondence to the command signal, wherein the command signal comprises commands for designating a plurality of pattern generators, regions of the test patterns and colors for the regions. ### Claim 10 (depends on 9) The display driving device according to claim 9, wherein the control circuit receives a test signal, and controls the data driving circuit such that the test patterns are displayed on the display panel when the test signal is enabled. ### Claim 11 (depends on 9) The display driving device according to claim 9, wherein the control circuit receives setting signals, and sets at least one among a display order, a display time, a frame frequency, a size, a shape, a color and a structure of each of the test patterns by changing the control data depending on the setting signals. ### Claim 12 (depends on 9) The display driving device according to claim 9, further comprising: a clock generation circuit configured to receive a test signal and provide a clock signal to the control circuit when the test signal is enabled. ### Claim 13 (depends on 9) The display driving device according to claim 9, wherein the control circuit provides an input signal which includes the clock signal, the pattern data and the control data, to the data driving circuit when the test signal is enabled. ### Claim 14 (depends on 9) The display driving device according to claim 9, wherein the storage circuit stores the pattern data and the control data corresponding to a plurality of test modes, and the control circuit receives setting signals and selects at least one test mode among the plurality of test modes in response to the setting signals. ### Claim 15 A display driving device having a test function, comprising: a pattern generation circuit configured to receive a command signal, and generate pattern data corresponding to test patterns for testing an image quality of a display panel in correspondence to the command signal; a control circuit configured to receive the pattern data from the pattern generation circuit, set a display order and a display time of each of the test patterns by using control data for controlling the pattern data, and control a data driving circuit such that at least two test patterns are displayed on the display panel depending on the control data when testing an image quality of the display panel, wherein the pattern generation circuit comprises a plurality of pattern generators which generate corresponding test patterns depending on the command signal, wherein the command signal comprises commands for designating the plurality of pattern generators, regions of the test patters and colors for the regions. ### Claim 16 (depends on 15) The display driving device according to claim 15, wherein the pattern generation circuit generates the test patterns by designating at least one among regions of the test patterns and colors, gradations and gradation stages for the regions, in correspondence to the command signal. ### Claim 17 (depends on 15) The display driving device according to claim 15, wherein further comprising: a storage circuit configured to store the pattern data generated from the pattern generation circuit and control data for controlling the pattern data. ### Claim 18 (depends on 17) The display driving device according to claim 17, wherein the control circuit receives setting signals, and sets at least one among a display order, a display time, a frame frequency, a size, a shape, a color and a structure of each of the test patterns by changing the control data depending on the setting signals.