# US 2021/0241665 A1 · Method for checking crack in display and electronic device for performing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241665 A1 - Document ID: US20210241665A1 - Status: Published application - Kind: A1 - Application number: 17/049,091 - Filed: 2019-05-21 - Published: 2021-08-05 - Earliest claimed: 2018-05-21 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Jongkon BAE; Hyunjun PARK; Donghwy KIM; Euntaek JANG; Dongkyoon HAN; Yunpyo HONG - Web page: https://patentgrep.com/patent/US20210241665A1 ## 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 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 3/035: {for flexible display surfaces} - G09G 2310/0267: Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays - 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 2310/0291: Details of output amplifiers or buffers 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 2330/021: Power management, e.g. power saving - 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 An electronic device is provided. The electronic device includes a display panel on which a plurality of pixels are arranged, first group lines providing a source voltage to each of the plurality of pixels, a display driver integrated circuit that includes a plurality of source amplifiers electrically connected with the first group lines and providing the source voltage to each of lie plurality of pixels, at least one sensing line crossing the first group lines, and first group switches disposed on the at least one sensing line, and a sensing circuit electrically connected with one end of the at least one sensing line to check a crack in at least a partial region of the electronic device. The display driver integrated circuit receives a specified signal for the electronic device to enter a sense mode, applies a first voltage to the other end of the at least one sensing line that is distinguished from the one end of the at least one sensing line, in response to the received specified signal, turns on the first group switches such that the at least one sensing line is short-circuited from the other end of the at least one sensing line to the sensing circuit, obtains a second voltage sensed by the sensing circuit electrically connected with the one end of the at least one sensing line, and checks information regarding the crack in the at least partial region of the electronic device based on a difference between the first voltage and the second voltage. In addition to the above, various embodiments identified through the specification are possible. ## Claims ### Claim 1 An electronic device comprising: a display panel on which a plurality of pixels are arranged; first group lines providing a source voltage to each of the plurality of pixels; a display driver integrated circuit that includes a plurality of source amplifiers electrically connected with the first group lines and providing the source voltage to each of the plurality of pixels, at least one sensing line crossing the first group lines, and first group switches disposed on the at least one sensing line; and a sensing circuit electrically connected with one end of the at least one sensing line to check a crack in at least partial region of the electronic device, wherein the display driven integrated circuit: receives a specified signal for the electronic device to enter a sense mode; applies a first voltage to the other end of the at least one sensing line that is distinguished from the one end of the at least one sensing line, in response to the received specified signal; turns on the first group switches such that the at least one sensing line is short-circuited from the other end of the at least one sensing line to the sensing circuit; obtains a second voltage sensed by the sensing circuit electrically connected with the one end of the at least one sensing line; and checks information regarding the crack in the at least partial region of the electronic device based on a difference between the first voltage and the second voltage. ### Claim 2 (depends on 1) The electronic device of claim 1, wherein the display driver integrated circuit applies the first voltage to the other end of the at least one sensing line by using any one of the plurality of source amplifiers, in response to the received specified signal. ### Claim 3 (depends on 2) The electronic device of claim 2, wherein the plurality of source amplifiers further include first group source switches respectively disposed at output terminals of the plurality of source amplifiers, and the display driver integrated circuit turns on the source switch disposed at the output terminal of any one of the source amplifiers among the first group source switches, in response to the received specified signal. ### Claim 4 (depends on 2) The electronic device of claim 2, wherein the display driver integrated circuit: further includes a multiplexer electrically connected with an input terminal of any one of the source amplifiers, and adjusts a magnitude of the output voltage of the one of the source amplifiers by using the multiplexer. ### Claim 5 (depends on 2) The electronic device of claim 2, wherein the display driver integrated circuit: sequentially applies the first voltage to the other end of the at least one sensing line by sequentially using the plurality of source amplifiers one by one according to a specified time interval, and sequentially checks whether or not each of the plurality of source amplifiers is abnormal based on the difference between the first voltage and the second voltage, according to the specified time interval. ### Claim 6 (depends on 5) The electronic device of claim 5, wherein the plurality of source amplifiers further include first group source switches respectively disposed at output terminals of the plurality of source amplifiers, and the display driver integrated circuit sequentially applies the first voltage to the other end of the at least one sensing line according to the specified time interval by sequentially turning on the first group source switches one by one according to the specified time interval. ### Claim 7 (depends on 1) The electronic device of claim 1, wherein the display driver integrated circuit: further includes a sense amplifier electrically connected with the other end of the at least one sensing line, and applies the first voltage to the other end of the at least one sensing line by using the sense amplifier, in response to the received specified signal. ### Claim 8 (depends on 7) The electronic device of claim 7, wherein the display driver integrated circuit: further includes a multiplexer electrically connected with an input terminal of the sense amplifier, and adjusts a magnitude of the output voltage of the sense amplifier by using the multiplexer. ### Claim 9 (depends on 1) The electronic device of claim 1, further comprising: an external power supply electrically connected with the other end of the at least one sensing line, wherein the display driver integrated circuit applies the first voltage to the other end of the at least one sensing line by using the external power supply. ### Claim 10 (depends on 9) The electronic device of claim 9, wherein the display driver integrated circuit: further includes a power switch disposed between the external power supply and the at least one sensing line, and turns on the power switch such that the first voltage is applied to the other end of the at least one sensing line from the external power supply in response to the received specified signal. ### Claim 11 (depends on 1) The electronic device of claim 1, further comprising: second group lines crossing the at least one sensing line and providing a gate voltage to each of the plurality of pixels, wherein the display driver integrated circuit: further includes a plurality of gate amplifiers electrically connected with the second group lines and providing the gate voltage to each of the plurality of pixels, sequentially applies the first voltage to the other end of the at least one sensing line by sequentially using the plurality of source amplifiers and the plurality of gate amplifiers one by one according to a specified time interval, and sequentially checks whether or not the plurality of source amplifiers and the plurality of gate amplifiers are abnormal based on the difference between the first voltage and the second voltage, according to the specified time interval. ### Claim 12 (depends on 11) The electronic device of claim 11, wherein the plurality of source amplifiers further include first group source switches respectively disposed at output terminals of the plurality of source amplifiers, the plurality of gate amplifiers further include first group gate switches respectively disposed at output terminals of the plurality of gate amplifiers, and the display driver integrated circuit sequentially applies the first voltage to the other end of the at least one sensing line according to the specified time interval by sequentially turning on the first group source switches and the first group gate switches one by one according to the specified time interval. ### Claim 13 (depends on 1) The electronic device of claim 1, further comprising: an external power supply supplying a specified voltage, wherein the display panel further includes first group transistors electrically connecting the external power supply with each of the first group lines, the display driver integrated circuit further includes a gate amplifier for applying a gate voltage to gate terminals of the first group transistors, and second group switches disposed on the first group lines to selectively connect the first group transistors with at least one sensing line, and the display driver integrated circuit: applies the gate voltage to the gate terminals of the first group transistors by using the gate amplifier such that the first group transistors are turned on in response to the received specified signal, sequentially turns on the second group switches one by one according to the specified time interval, sequentially applies the first voltage to the other end of the at least one sensing line through any one of the first group transistors and any one of the first group lines by using the external power supply according to the specified time interval, and sequentially checks whether or not the plurality of pixels are cracked based on the difference between the first voltage and the second voltage, according to the specified time interval. ### Claim 14 (depends on 1) The electronic device of claim 1, wherein each of the plurality of pixels includes a plurality of sub-pixels electrically connected. with the source amplifiers through the first group lines, and the display driver integrated circuit: further includes first group sharing switches disposed between at least some of the first group lines on the sensing line such that the sub-pixels included in any one of the plurality of pixels are selectively connected with each other, and turns on the first group switches and the first group sharing switches such that the at least one sensing line is short-circuited from the other end or the at least one sensing line to the sensing circuit. ### Claim 15 (depends on 1) The electronic device of claim 1, wherein each of the plurality of pixels includes a plurality of sub-pixels electrically connected with the source amplifiers through the first group lines, and the display driver integrated circuit: further includes first group sharing switches disposed between at least some of the first group lines on the sensing line such that at least sub-pixels having the same characteristic among the plurality of sub-pixels are selectively connected with each other, and turns on the first group switches and first group sharing switches such that the at least one sensing line is short-circuited from the other end of the at least one sensing line to the sensing circuit.