# US 11,908,882 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 11,908,882 B2 - Document ID: US11908882B2 - Status: Granted - Kind: B2 - Application number: 17/182,591 - Filed: 2021-02-23 - Published: 2022-01-13 - Granted: 2024-02-20 - Earliest claimed: 2020-07-09 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hyong Do Choi - Web page: https://patentgrep.com/patent/US11908882B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 3/3266: Details of drivers for scan electrodes - H05K 1/189: characterised by the use of flexible or folded printed circuits - H10H 20/831: characterised by their shape - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - G09G 2300/0408: Integration of the drivers onto the display substrate - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with 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 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 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2330/026: Arrangements or methods related to booting a display - H05K 2201/10128: Display - 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) - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A display device of the invention includes pixels each connected to at least one of scan lines and at least one of emission lines, a scan driver providing scan signals to the scan lines, and an emission driver including stages connected to the emission lines, each of the stages providing an emission signal to a corresponding emission line. A first stage among the stages includes a first transistor including a first electrode connected to a first power source line, a second electrode connected to a first emission line, and a gate electrode connected to a first scan line, and a second transistor including a first electrode connected to a first node and a second electrode connected to the first emission line. ## Claims ### Claim 1 A display device comprising: pixels each connected to at least one of scan lines and at least one of emission lines; a scan driver providing scan signals to the scan lines; and an emission driver including stages connected to the emission lines, each of the stages providing an emission signal to a corresponding emission line of the emission lines, a first stage among the stages including: a first transistor including: a first electrode connected to a first power source line; a second electrode connected to a first emission line of the emission lines; and a gate electrode connected to a first scan line of the scan lines; and a second transistor including: a first electrode connected to a first node; and a second electrode connected to the first emission line. ### Claim 2 (depends on 1) The display device of claim 1, wherein a gate electrode of the second transistor is connected to the first electrode of the second transistor. ### Claim 3 (depends on 2) The display device of claim 2, further comprising: a common resistor including a first electrode connected to the first node and a second electrode connected to a second power source line. ### Claim 4 (depends on 3) The display device of claim 3, further comprising: a display substrate on which the pixels and the emission driver are disposed; and a circuit board on which the common resistor is disposed. ### Claim 5 (depends on 4) The display device of claim 4, further comprising: a flexible circuit board electrically connecting the display substrate and the circuit board. ### Claim 6 (depends on 3) The display device of claim 3, wherein a second stage among the stages includes: a third transistor including a first electrode connected to the first power source line, a second electrode connected to a second emission line of the emission lines, and a gate electrode connected to a second scan line of the scan lines; and a fourth transistor including a first electrode connected to the first node and a second electrode connected to the second emission line, and wherein a gate electrode of the fourth transistor is connected to the first electrode of the fourth transistor. ### Claim 7 (depends on 6) The display device of claim 6, wherein the first stage further includes a fifth transistor including a first electrode connected to the first power source line and a second electrode connected to the first emission line. ### Claim 8 (depends on 7) The display device of claim 7, wherein the second stage further includes a sixth transistor including a first electrode connected to the first power source line, a second electrode connected to the second emission line, and a gate electrode connected to the first scan line. ### Claim 9 (depends on 8) The display device of claim 8, wherein the scan driver sequentially applies the scan signals of a turn-on level to the first scan line and the second scan line in each of a first frame period and a second frame period after the first frame period. ### Claim 10 (depends on 9) The display device of claim 9, wherein the emission driver maintains emission signals of a turn-off level in the first emission line and the second emission line during the first frame period and sequentially supplies the emission signals of the turn-off level to the first emission line and the second emission line during the second frame period. ### Claim 11 (depends on 10) The display device of claim 10, wherein the second power source line is maintained at a voltage of a turn-off level during the first frame period and maintained at a voltage of a turn-on level during the second frame period. ### Claim 12 (depends on 11) The display device of claim 11, wherein the first frame period is a frame period immediately after the display device is powered on. ### Claim 13 (depends on 8) The display device of claim 8, wherein the scan driver sequentially supplies a first scan signal and a second scan signal of a turn-on level to the first scan line and the second scan line during one frame period, and wherein a period of the turn-on level of the first scan signal and a period of the turn-on level of the second scan signal do not overlap each other during the one frame period. ### Claim 14 (depends on 13) The display device of claim 13, wherein the second stage applies the emission signal of a first turn-off level to the second emission line in synchronization with the first scan signal of the turn-on level and applies the emission signal of a second turn-off level to the second emission line in synchronization with the second scan signal of the turn-on level during the one frame period. ### Claim 15 (depends on 6) The display device of claim 6, wherein the first to fourth transistors are P-type transistors, and wherein the pixels include the P-type transistors. ### Claim 16 (depends on 15) The display device of claim 15, wherein a voltage of the first power source line is greater than a voltage of the second power source line during a display period of the pixels. ### Claim 17 (depends on 6) The display device of claim 6, wherein the first to fourth transistors are N-type transistors, and wherein the pixels include the N-type transistors. ### Claim 18 (depends on 17) The display device of claim 17, wherein a voltage of the first power source line is less than a voltage of the second power source line during a display period of the pixels. ### Claim 19 (depends on 8) The display device of claim 8, wherein the first scan line, the second scan line, and the second emission line are connected to a same pixel of the pixels. ### Claim 20 (depends on 6) The display device of claim 6, wherein a pixel of the pixels connected to the second scan line and the second emission line is not connected to the first scan line.