# US 2008/0186301 A1 · Organic light emitting diode display device and method of aging the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0186301 A1 - Document ID: US20080186301A1 - Status: Published application - Kind: A1 - Application number: 12/068,030 - Filed: 2008-01-31 - Published: 2008-08-07 - Earliest claimed: 2007-02-01 - Assignees: Samsung Display Co., Ltd. - Inventors: Hye-Hyang Park; Sun-A Yang - Web page: https://patentgrep.com/patent/US20080186301A1 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0866: by means of changes in the pixel supply voltage - 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 An organic light emitting diode (OLED) display device and a method for aging the organic light emitting diode (OLED) display device. The OLED display device is constructed with an organic light emitting diode, a scan line for applying a scan signal, a data line for applying a data signal, a driving unit for applying the data signal in response to the scan signal, a driving transistor having a gate terminal electrically connected to the driving unit to supply a driving current to the organic light emitting diode in response to the data signal, and a first reverse bias transistor electrically connected between the gate terminal of the driving transistor and a first reverse bias voltage source. The method for aging the OLED display device includes: aging an organic light emitting diode, applying the same voltage to both of a first power supply voltage line, which is electrically connected to a first electrode of a driving transistor, and a second power supply voltage line, which is electrically connected to a second electrode of the organic light emitting diode, and applying a third reverse bias voltage to a gate terminal of the driving transistor. ## Claims ### Claim 1 An organic light emitting diode (OLED) display device, comprising: an organic light emitting diode; a scan line for applying a scan signal; a data line for applying a data signal; a driving unit for applying the data signal in response to the scan signal; a driving transistor having a gate terminal electrically connected to the driving unit to supply a driving current to the organic light emitting diode in response to the data signal; and a first reverse bias transistor electrically connected between the gate terminal of the driving transistor and a first reverse bias voltage source. ### Claim 2 (depends on 1) The OLED display device according to claim 1, with the first reverse bias transistor being turned on in response to a first reverse bias control signal and applies a first reverse voltage to the gate terminal of the driving transistor. ### Claim 3 (depends on 2) The OLED display device according to claim 2, with the driving transistor being a P-channel metal oxide semiconductor (PMOS) transistor, and the first reverse bias voltage ranging from approximately 5 V to approximately 20 V. ### Claim 4 (depends on 1) The OLED display device according to claim 1, further comprising a second reverse bias transistor electrically connected between the organic light emitting diode and a second reverse bias voltage source. ### Claim 5 (depends on 4) The OLED display device according to claim 4, with the second reverse bias transistor being electrically connected between a first electrode of the organic light emitting diode, which is electrically connected to an electrode of the driving transistor, and the second reverse bias voltage source. ### Claim 6 (depends on 4) The OLED display device according to claim 4, with the second reverse bias transistor being turned on in response to a second reverse bias control signal and applies a second reverse bias voltage to the organic light emitting diode. ### Claim 7 (depends on 6) The OLED display device according to claim 6, with the second reverse bias voltage ranging from approximately −14 V to approximately −10 V. ### Claim 8 (depends on 1) The OLED display device according to claim 1, with the driving unit comprising: a switching transistor for applying the data signal to the gate terminal of the driving transistor in response to the scan signal; and a capacitor for storing the data signal applied from the switching transistor. ### Claim 9 (depends on 8) The OLED display device according to claim 8, with the switching transistor having a different conductivity type from the first reverse bias transistor. ### Claim 10 A method for aging an organic light emitting diode (OLED) display device, comprising: aging an organic light emitting diode; applying a first voltage to both of a first power supply voltage line, which is electrically connected to a first electrode of a driving transistor, and a second power supply voltage line, which is electrically connected to a second electrode of the organic light emitting diode, with a second electrode of the driving transistor being electrically connected to a first electrode of the organic light emitting diode; and applying a third reverse bias voltage to a gate terminal of the driving transistor. ### Claim 11 (depends on 10) The method according to claim 10, with the third reverse bias voltage being applied to the gate terminal of the driving transistor through a data line in response to a scan signal. ### Claim 12 (depends on 11) The method according to claim 11, with the third reverse bias voltage having an absolute value higher than that of the first voltage applied to the first electrode of the driving transistor through the first power supply voltage line. ### Claim 13 (depends on 11) The method according to claim 11, with the third reverse bias voltage being higher by approximately 5 V to approximately 20 V than the first voltage applied to the first electrode of the driving transistor. ### Claim 14 (depends on 11) The method according to claim 11, with the third reverse bias voltage being an alternating voltage. ### Claim 15 (depends on 10) The method according to claim 10, with the third reverse bias voltage being applied by turning on a third reverse bias transistor electrically connected between the gate terminal of the driving transistor and a third reverse bias voltage source. ### Claim 16 (depends on 15) The method according to claim 15, with the third reverse bias voltage being higher than the first voltage applied to the first electrode of the driving transistor. ### Claim 17 (depends on 16) The method according to claim 16, with the third reverse bias voltage being higher by approximately 5 V to approximately 20 V than the first voltage applied to the first electrode of the driving transistor. ### Claim 18 (depends on 10) The method according to claim 10, with aging the organic light emitting diode being electrically performed by applying a fourth reverse bias voltage to the organic light emitting diode. ### Claim 19 (depends on 18) The method according to claim 18, with the fourth reverse bias voltage being applied by turning on a fourth reverse bias transistor electrically connected between a first electrode of the organic light emitting diode, which is electrically connected to a second electrode of the driving transistor, and a fourth reverse bias voltage source. ### Claim 20 (depends on 18) The method according to claim 18, with the fourth reverse bias voltage ranging from approximately −14 V to approximately −10 V.