# US 12,603,060 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 12,603,060 B2 - Document ID: US12603060B2 - Status: Granted - Kind: B2 - Application number: 18/967,304 - Filed: 2024-12-03 - Published: 2025-07-03 - Granted: 2026-04-14 - Earliest claimed: 2023-12-28 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Mangyu Park - Web page: https://patentgrep.com/patent/US12603060B2 ## CPC - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2310/0289: Details of voltage level shifters arranged for use in a driving circuit - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/043: Preventing or counteracting the effects of ageing - 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 The present disclosure relates to a display device, and more specifically, to a display device for controlling outputs by arranging a masking switch or an XOR gate between a level shifter and a switch array of a data driver. The display device presented herein minimizes or at least reduces the degradation of image quality by controlling the output of the data driver under a specific condition. ## Claims ### Claim 1 A display device, comprising: a timing controller configured to output image data; a display panel including a plurality of pixels, and a plurality of data lines connected to the plurality of pixels; and a data driver configured to generate a data voltage based on the image data, and apply the data voltage to a data line of the plurality of data lines, the data driver including: a level shifter configured to receive the image data; a switch array configured to generate the data voltage from the image data; a masking switch between the level shifter and the switch array; and an output buffer configured to output the data voltage from the data line. ### Claim 2 (depends on 1) The display device of claim 1, wherein an output of the output buffer is stopped when the masking switch is turned off. ### Claim 3 (depends on 2) The display device of claim 2, wherein the masking switch is connected to each of a plurality of level shifters. ### Claim 4 (depends on 2) The display device of claim 2, wherein the masking switch is connected to an uppermost level shifter among a plurality of level shifters. ### Claim 5 (depends on 1) The display device of claim 1, wherein the data driver further includes a delay unit connected to a control node of the masking switch. ### Claim 6 (depends on 5) The display device of claim 5, wherein the delay unit includes a plurality of buffers. ### Claim 7 (depends on 6) The display device of claim 6, wherein the delay unit operates asynchronously. ### Claim 8 (depends on 7) The display device of claim 7, wherein the delay unit includes a plurality of flip-flops. ### Claim 9 (depends on 8) The display device of claim 8, wherein the delay unit operates synchronously, and the delay unit includes one clock. ### Claim 10 (depends on 1) The display device of claim 1, wherein the data driver further includes a latch configured to maintain the image data as per-frame image data on at least one channel unit basis and provide the image data to the level shifter. ### Claim 11 (depends on 10) The display device of claim 10, wherein the latch operates in synchronization with a latch start pulse that controls a start time point at which the data voltage is supplied to the level shifter. ### Claim 12 (depends on 11) The display device of claim 11, wherein the data driver further includes a delay unit connected to a control node of the masking switch. ### Claim 13 (depends on 12) The display device of claim 12, wherein the latch start pulse is supplied to an input of the delay unit. ### Claim 14 (depends on 1) The display device of claim 1, further comprising: a gamma driver configured to generate gamma reference voltages based on a gamma control signal generated by the timing controller, wherein the data driver further includes a plurality of resistor strings configured to output a plurality of analog voltages to the level shifter based on the gamma reference voltages.