# US 12,217,686 B2 · Pixel and organic light emitting display device having the pixel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,217,686 B2 - Document ID: US12217686B2 - Status: Granted - Kind: B2 - Application number: 18/473,549 - Filed: 2023-09-25 - Published: 2024-01-11 - Granted: 2025-02-04 - Earliest claimed: 2016-12-01 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Chong Chul Chai; Dong Woo Kim; Kyoung Ju Shin; Bo Yong Chung - Web page: https://patentgrep.com/patent/US12217686B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3275: Details of drivers for data electrodes - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - 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 2310/0216: Interleaved control phases for different scan lines in the same sub-field, e.g. initialization, addressing and sustaining in plasma displays that are not simultaneous for all scan lines - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0214: with crosstalk due to leakage current of pixel switch in active matrix panels - G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - G09G 2320/0626: for control of overall brightness - G09G 2330/023: using energy recovery or conservation - H10D 30/6745: {Polycrystalline or microcrystalline silicon} - H10D 30/6755: {Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate} - H10D 86/423: {comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO} - H10D 86/60: wherein the TFTs are in active matrices - 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) - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract A pixel includes a plurality of transistors, a storage capacitor, and an organic light emitting diode. A first transistor controls the amount of current from a first driving power source to the organic light emitting diode based on a data voltage. A second transistor is connected to a data line and is turned on based on a scan signal. A third transistor coupled to the first transistor and is turned on based on the scan signal. A first stabilizing transistor is coupled to the third transistor or between the first and third transistors and is turned off when the third transistor is turned off. ## Claims ### Claim 1 A pixel, comprising: a light emitting diode; a first transistor to control an amount of current flowing from a first driving power source to a second driving power source, via the light emitting diode, based on a voltage of a first node; a first stabilizing transistor coupled between a first electrode of the first transistor and the first node; a storage capacitor coupled between the first node and an anode of the light emitting diode, the storage capacitor being indirectly coupled to the first driving power source; and a second transistor coupled between a data line and a second node, wherein the first transistor and the second transistor are N-type poly-silicon semiconductor transistors, the first stabilizing transistor is an N-type oxide semiconductor transistor, and a gate electrode of the first stabilizing transistor and a gate electrode of the second transistor are connected to different lines. ### Claim 2 (depends on 1) The pixel of claim 1, wherein the first stabilizing transistor is turned on when a control power source is set to a gate-on voltage, and the second transistor is turned on when a scan signal is supplied to a scan line. ### Claim 3 (depends on 1) The pixel of claim 1, further comprising: a third transistor coupled between the second node and the anode of the light emitting diode, wherein the third transistor is turned off when a first light emitting control signal is supplied to a first light emitting control line. ### Claim 4 (depends on 3) The pixel of claim 3, further comprising: a sixth transistor coupled between the first driving power source and the first electrode of the first transistor, wherein the sixth transistor is turned off when a second light emitting control signal is supplied to a second light emitting control line. ### Claim 5 (depends on 4) The pixel of claim 4, further comprising: a fifth transistor coupled between a first power source and the anode of the light emitting diode. ### Claim 6 (depends on 5) The pixel of claim 5, further comprising: a fourth transistor coupled between the first stabilizing transistor and the first electrode of the first transistor. ### Claim 7 (depends on 6) The pixel of claim 6, wherein the fourth transistor is turned on when a scan signal is supplied to a scan line, and the fifth transistor is turned on when the scan signal is supplied to the scan line. ### Claim 8 (depends on 7) The pixel of claim 7, wherein the scan signal is supplied after the first light emitting control signal is supplied. ### Claim 9 (depends on 8) The pixel of claim 8, wherein the second light emitting control signal is supplied after the scan signal is supplied. ### Claim 10 (depends on 6) The pixel of claim 6, further comprising: a second stabilizing transistor coupled between the data line and the second transistor. ### Claim 11 (depends on 10) The pixel of claim 10, wherein the third, the fourth, the fifth, and the sixth transistors are N-type poly-silicon semiconductor transistors, and the second stabilizing transistor is an N-type oxide semiconductor transistor. ### Claim 12 (depends on 11) The pixel of claim 11, wherein the second stabilizing transistor is turned on when a control power source is set to a gate-on voltage. ### Claim 13 (depends on 1) The pixel of claim 1, wherein the storage capacitor is indirectly coupled to the second driving power source. ### Claim 14 (depends on 1) The pixel of claim 1, wherein each electrode of the storage capacitor is a node different from the first driving power source. ### Claim 15 (depends on 1) The pixel of claim 1, wherein the storage capacitor is directly electrically connected to the second node. ### Claim 16 (depends on 15) The pixel of claim 15, wherein the storage capacitor is directly electrically connected to the first node. ### Claim 17 A pixel, comprising: a light emitting diode; a first transistor to control an amount of current flowing from a first driving power source to a second driving power source, via the light emitting diode, based on a voltage of a first node; a first stabilizing transistor coupled between a first electrode of the first transistor and the first node; a storage capacitor coupled between the first node and an anode of the light emitting diode; a second transistor coupled between a data line and a second node; a third transistor coupled between the second node and the anode of the light emitting diode; and a sixth transistor coupled between the first driving power source and the first electrode of the first transistor, wherein the first transistor and the second transistor are N-type poly-silicon semiconductor transistors and the first stabilizing transistor is an N-type oxide semiconductor transistor, wherein the third transistor is turned off when a first light emitting control signal is supplied to a first light emitting control line, wherein the sixth transistor is turned off when a second light emitting control signal is supplied to a second light emitting control line, and wherein the first light emitting control signal and the second light emitting control signal are supplied during different periods. ### Claim 18 (depends on 17) The pixel of claim 17, wherein the second light emitting control signal is supplied after the first light emitting control signal is supplied.