# US 9,437,135 B2 · Pixel and organic light emitting display using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,135 B2 - Document ID: US9437135B2 - Status: Granted - Kind: B2 - Application number: 14/316,185 - Filed: 2014-06-26 - Published: 2015-01-08 - Granted: 2016-09-06 - Earliest claimed: 2013-07-03 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Soon-Dong Kim; Hyung-Ryul Kang - Web page: https://patentgrep.com/patent/US9437135B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - 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 - H10D 86/441: {Interconnections, e.g. scanning lines} - H10D 86/60: wherein the TFTs are in active matrices - H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT] - H10K 59/131: Interconnections, e.g. wiring lines or terminals - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - 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 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - H10K 59/12: Active-matrix OLED [AMOLED] displays - 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 - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A pixel and an organic light emitting display, the pixel including an organic light emitting diode, a first driver, and a second driver. The first driver controls whether current is supplied to the organic light emitting diode, according to a first data signal from a first data line. The second driver controls whether current is supplied to the organic light emitting diode, according to a second data signal from a second data line. ## Claims ### Claim 1 A pixel, comprising: an organic light emitting diode; a first driver configured to selectively supply a first current to the organic light emitting diode based on a first data signal received from a first data line; and a second driver configured to selectively supply a second current to the organic light emitting diode based on a second data signal received from a second data line, wherein each of the first and second drivers comprises: a first transistor coupled between a first power source and the organic light emitting diode, the first transistor configured to supply a driving current to the organic light emitting diode while being driven in a saturation region corresponding to a bias voltage, a second transistor disposed on a current path along which the driving current flows, the second transistor configured to turn on or off based on at least one of the first data signal and the second data signal, and a first capacitor coupled between a gate electrode of the second transistor and the first power source. ### Claim 2 (depends on 1) The pixel of claim 1, wherein the first and second drivers are in a same circuit. ### Claim 3 (depends on 1) The pixel of claim 1, wherein the second transistor is driven in a linear region. ### Claim 4 (depends on 1) The pixel of claim 1, wherein each of the first and second drivers further comprises a third transistor coupled between the gate electrode of the second transistor and at least one of the first data line and the second data line, the third transistor configured to be turned on when a scan signal is supplied to a scan line. ### Claim 5 (depends on 1) The pixel of claim 1, further comprising a second capacitor coupled between a gate electrode of the first transistor and the first power source. ### Claim 6 (depends on 1) The pixel of claim 1, wherein the second transistor is disposed between the first transistor and the organic light emitting diode. ### Claim 7 (depends on 1) The pixel of claim 1, wherein the second transistor is disposed between the first power source and the first transistor. ### Claim 8 An organic light emitting display, comprising: pixels disposed in an area at least partially defined by scan lines, first data lines, and second data lines; and a bias power supply unit configured to supply a bias voltage to the pixels, wherein each pixel comprises: an organic light emitting diode; a first driver configured to selectively supply a first current supplied to the organic light emitting diode based on a first data signal received from a first data line; and a second driver configured to selectively supply a second current to the organic light emitting diode based on a second data signal received from a second data line, wherein each of the first and second drivers comprises: a first transistor coupled between a first power source and the organic light emitting diode, the first transistor configured to supply a driving current to the organic light emitting diode while being driven in a saturation region corresponding to the bias voltage; a second transistor positioned on a current path along which the driving current flows, the second transistor configured to turn on or off based on at least one of the first data signal and the second data signal; and a first capacitor coupled between a gate electrode of the second transistor and the first power source. ### Claim 9 (depends on 8) The organic light emitting display of claim 8, wherein the bias power supply unit is configured to supply different voltages to red, green, and blue pixels that generate red light, green light, and blue light, respectively. ### Claim 10 (depends on 8) The organic light emitting display of claim 8, further comprising: a timing controller configured to supply data to a data driver; a scan driver configured to supply a scan signal to the scan lines for each scan period of sub-frames comprised in one frame, wherein the data driver is configured to supply the first data signal to the first data lines and to supply the second data signal to the second data lines, in synchronization with the scan signal. ### Claim 11 (depends on 10) The organic light emitting display of claim 10, wherein the data driver is configured to: generate the first data signal according to low-gray-scale bits comprising least significant bits (LSB) of the data, and generate the second data signal according to high-gray-scale bits comprising most significant bits (MSB) of the data. ### Claim 12 (depends on 8) The organic light emitting display of claim 8, wherein the first data signal is: a turn-on voltage at which the first current flows from the first driver to the organic light emitting diode, or a turn-off voltage at which the first current does not flow from the first driver to the organic light emitting diode. ### Claim 13 (depends on 8) The organic light emitting display of claim 8, wherein the second data signal is: a turn-on voltage at which the second current flows from the second driver to the organic light emitting diode, or a turn-off voltage at which the second current does not flow from the second driver to the organic light emitting diode. ### Claim 14 (depends on 8) The organic light emitting display of claim 8, wherein the second transistor is driven in a linear region. ### Claim 15 (depends on 8) The organic light emitting display of claim 8, wherein each of the first and second drivers further comprises a third transistor coupled between the gate electrode of the second transistor and at least one of the first data line and the second data line, the third transistor configured to be turned on when a scan signal is supplied to a scan line. ### Claim 16 (depends on 8) The organic light emitting display of claim 8, wherein the pixel further comprises a second capacitor coupled between a gate electrode of the first transistor and the first power source. ### Claim 17 (depends on 8) The organic light emitting display of claim 8, wherein the second transistor is disposed between the first transistor and the organic light emitting diode. ### Claim 18 (depends on 8) The organic light emitting display of claim 8, wherein the second transistor is disposed between the first power source and the first transistor.