# US 12,118,934 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 12,118,934 B2 - Document ID: US12118934B2 - Status: Granted - Kind: B2 - Application number: 17/884,319 - Filed: 2022-08-09 - Published: 2023-03-16 - Granted: 2024-10-15 - Earliest claimed: 2021-09-10 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: UnSang Yu; Bongchoon Kwak - Web page: https://patentgrep.com/patent/US12118934B2 ## 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 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0852: being a dynamic memory with more than one capacitor - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/029: by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel - G09G 2320/0295: by monitoring each display pixel - G09G 2330/10: Dealing with defective pixels - 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, by detecting a subpixel which is a defect by using an electronic fuse electrically connected to a driving transistor disposed on a subpixel and performing a repair, a display device being capable of detecting a defect and repairing by a circuit driving of the subpixel can be provided. Thus, even in the case that a repair by a physical method is not possible according to types of the display device, by detecting a defect of the subpixel and performing a repair, an image quality deterioration due to the defect of the subpixel can be prevented. ## Claims ### Claim 1 A display device, comprising: a plurality of subpixels disposed on an active area of a display panel; and a light-emitting element disposed on each of the plurality of subpixels and having a first electrode and a second electrode; wherein a first light-emitting element disposed in a first subpixel comprises: a driving transistor configured to control a driving current supplied to the light-emitting element; an electronic fuse electrically connected between the driving transistor and the first electrode of the light-emitting element; and a capacitor having a first capacitor electrode electrically connected to a gate node of the driving transistor and a second capacitor electrode electrically connected to the light-emitting element, wherein one end of the electronic fuse is electrically connected to the second capacitor electrode and the light-emitting element, and another end of the electronic fuse is electrically connected to the driving transistor, and wherein the electronic fuse is disposed in a via amongst a stack of vias that are stacked between a source node of the driving transistor and the first electrode. ### Claim 2 (depends on 1) The display device of claim 1, wherein the electronic fuse disposed on at least one subpixel of the plurality of subpixels is open. ### Claim 3 (depends on 2) The display device of claim 2, wherein a compensation data voltage greater than a voltage corresponding to an image data is supplied to at least one subpixel positioned on a periphery of a subpixel on which the open electronic fuse is disposed. ### Claim 4 (depends on 3) The display device of claim 3, wherein a color represented by a subpixel to which the compensation data voltage is supplied is identical to a color represented by a subpixel on which the open electronic fuse is disposed. ### Claim 5 (depends on 3) The display device of claim 3, wherein the first electrode of the light-emitting element disposed on a subpixel to which the compensation data voltage is supplied is insulated from the first electrode of the light-emitting element disposed on a subpixel on which the open electronic fuse is disposed. ### Claim 6 (depends on 2) The display device of claim 2, wherein a normal data voltage corresponding to an image data is supplied to at least one subpixel positioned on a periphery of a subpixel on which the open electronic fuse is disposed. ### Claim 7 (depends on 1) The display device of claim 1, wherein, during a first period, a sensing data voltage is supplied to a gate node of the driving transistor disposed on at least one subpixel of the plurality of subpixels and a sensing current which flows on a node between the driving transistor and the first electrode of the light-emitting element is detected. ### Claim 8 (depends on 7) The display device of claim 7, wherein the second electrode of the light-emitting element is floated during the first period. ### Claim 9 (depends on 7) The display device of claim 7, wherein, when the sensing current is included in a pre-determined range, during a second period after the first period, a repair data voltage greater than the sensing data voltage is supplied to the gate node of the driving transistor disposed on a subpixel that the sensing current is detected. ### Claim 10 (depends on 9) The display device of claim 9, wherein the second electrode of the light-emitting element is floated during the second period. ### Claim 11 (depends on 9) The display device of claim 9, wherein, when the sensing current is smaller than a pre-determined value, the repair data voltage is not supplied to a subpixel that the sensing current is detected during the second period. ### Claim 12 (depends on 9) The display device of claim 9, wherein, after the second period, the electronic fuse disposed on the subpixel to which the repair data voltage is supplied is open. ### Claim 13 (depends on 1) The display device of claim 1, wherein the driving transistor and the light-emitting element are disposed on an opaque substrate. ### Claim 14 A display device, comprising: a first subpixel comprising a first light-emitting element, a first driving transistor configured to drive the first light-emitting element, and a first electronic fuse electrically connected to the first driving transistor; a second subpixel comprising a second light-emitting element, a second driving transistor configured to drive the second light-emitting element, and a second electronic fuse being open and electrically connected to the second driving transistor; and a capacitor having a first capacitor electrode electrically connected to a gate node of the first driving transistor or the second driving transistor and a second capacitor electrode electrically connected to the first light-emitting element or the second light-emitting element, wherein the second light-emitting element has an anode electrode that is insulated from an anode electrode of the first light-emitting element, wherein one end of the first electronic fuse or the second electronic fuse is electrically connected to the second capacitor electrode and the first light-emitting element or the second light-emitting element, and another end of the first electronic fuse or the second electronic fuse is electrically connected to the first driving transistor or the second driving transistor, and wherein the second electronic fuse is disposed in a via amongst a stack of vias that are stacked between a source node of the second driving transistor and the second light-emitting element.