KR20070025765A - Organic light emitting diodes and driving method thereof - Google Patents

Organic light emitting diodes and driving method thereof Download PDF

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KR20070025765A
KR20070025765A KR1020050082271A KR20050082271A KR20070025765A KR 20070025765 A KR20070025765 A KR 20070025765A KR 1020050082271 A KR1020050082271 A KR 1020050082271A KR 20050082271 A KR20050082271 A KR 20050082271A KR 20070025765 A KR20070025765 A KR 20070025765A
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light emitting
scan
organic light
thin film
film transistor
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KR1020050082271A
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KR100747259B1 (en
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김승태
현창호
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엘지전자 주식회사
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G09G3/3241—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
    • G09G3/325—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror the data current flowing through the driving transistor during a setting phase, e.g. by using a switch for connecting the driving transistor to the data driver
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0205—Simultaneous scanning of several lines in flat panels

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

An organic light emitting element, a display device using the same, and a driving method thereof are provided to reduce the minimum brightness and to improve gray scale expression performance by expressing brightness after a selective erasing process. An organic light emitting display device includes a data driver(34) for applying a data signal to a data line, a scan driver(36,37) for selectively applying first and second scan signals to a scan line, and a pixel circuit unit(32) having a plurality of organic light emitting elements. The scan line is composed of a first scan line for receiving a first scan signal and a second scan line for receiving a second scan signal. The scan driver is composed of a first scan driver for applying the first scan signal to the first scan line and a second scan driver for applying the second scan signal to the second scan line. The organic light emitting element includes an organic light emitting diode operating in response to output current, a driving TFT(Thin Film Transistor) supplying the output current to the organic light emitting diode, a first switching part for turning on the driving TFT by the first scan signal, and a second switching part for selectively turning off the driving TFT by the data signal while the second scan signal is applied.

Description

유기전계발광소자 및 그 표시장치, 그 구동방법{Organic Light Emitting Diodes and Driving Method Thereof}Organic Light Emitting Diodes and Display Apparatus, Driving Method Thereof {Organic Light Emitting Diodes and Driving Method Thereof}

도1은 종래 액티브 매트릭스형 유기전계발광소자의 등가회로도.1 is an equivalent circuit diagram of a conventional active matrix organic light emitting display device.

도2는 종래 유기전계발광소자의 프레임 구성도.2 is a frame diagram of a conventional organic light emitting display device.

도3은 종래 유기전계발광소자의 구동 타이밍도. 3 is a driving timing diagram of a conventional organic light emitting display device.

도4는 본 발명의 일실시예에 따른 유기전계발광 표시장치의 시스템 구성도.4 is a system configuration diagram of an organic light emitting display device according to an embodiment of the present invention.

도5는 도4의 유기전계발광소자의 등가회로도.FIG. 5 is an equivalent circuit diagram of the organic light emitting display device of FIG. 4. FIG.

도6은 제1스캔신호 입력시 도5의 유기전계발광소자의 작동도.6 is an operation diagram of the organic light emitting display device of FIG. 5 when a first scan signal is input.

도7은 제2스캔신호 입력시 도5의 유기전계발광소자의 작동도.7 is an operation diagram of the organic light emitting display device of FIG. 5 when a second scan signal is input.

도8은 도4의 제1스캔구동부의 구성도.FIG. 8 is a configuration diagram of the first scan driver of FIG. 4. FIG.

도9는 도4의 유기전계발광소자의 프레임 구성도.9 is a frame configuration diagram of the organic light emitting display device of FIG. 4.

도10은 본 발명의 일실시예에 따른 유기전계발광 표시장치의 구동 타이밍도.10 is a driving timing diagram of an organic light emitting display device according to an embodiment of the present invention.

*도면의 주요부호에 대한 설명** Description of the major symbols in the drawings *

30: 유기전계발광 표시장치 32: 픽셀회로부30: organic light emitting display device 32: pixel circuit portion

33: 유기전계발광소자 34: 데이터구동부33: organic light emitting device 34: data driver

36: 제1스캔구동부 37: 제2스캔구동부36: first scan driver 37: second scan driver

본 발명은 유기전계발광소자 및 그 표시장치, 그의 구동방법에 관한 것이다.The present invention relates to an organic light emitting display device, a display device thereof, and a driving method thereof.

유기전계발광소자(Organic Light Emitting Diodes, OLED)는 전자와 정공의 재결합으로 형광물질을 발광시키는 자발광소자이었다. 이 유기전계발광소자를 포함하는 유기전계발광 표시장치는, 액정 디스플레이장치와 같이 별도의 광원을 필요로 하는 수동형 발광소자에 비하여 응답속도가 빠르고 직류구동전압이 낮고 초박막화가 가능하기 때문에 벽걸이형 또는 휴대용으로 응용이 가능하였다.Organic light emitting diodes (OLEDs) were self-luminous devices that emit fluorescent materials by recombination of electrons and holes. The organic light emitting display device including the organic light emitting display device is a wall-mounted or portable device because the response speed is faster, the DC driving voltage is lower, and the ultra-thin film is possible than the passive light emitting device which requires a separate light source like the liquid crystal display device. Application was possible.

이와 같은 유기전계발광소자는 적색, 청색, 녹색의 서브픽셀들이 하나의 색을 표현하는 픽셀들을 이용하여 컬러를 구현하였다. 이때 유기전계발광소자는 서브픽셀을 구동하는 방식으로 단순매트릭스형 유기전계발광소자(Passive Matrix OLED, PMOLED)와 박막트랜지스터(TFT)를 이용하여 구동하는 방식인 액티브 매트릭스형 유기전계발광소자(Active Matrix OLED, AMOLED)로 나눌 수 있었다. Such an organic light emitting display device implements color using pixels in which red, blue, and green subpixels represent one color. At this time, the organic light emitting diode is an active matrix organic light emitting diode (active matrix) which is a method of driving using a simple matrix type organic light emitting diode (PMOLED) and a thin film transistor (TFT) as a method of driving a subpixel. OLED, AMOLED).

액티브 매트릭스형 유기전계발광소자(AMOLED)의 구동방법으로 전류구동방식과 전압구동방식, 디지털구동방식 등이 있었다. 액티브 매트릭스형 유기전계발광소자(AMOLED)의 디지털구동방식은 전압 보상 구동방식이나 전류 구동방식이 박막트랜지스터를 사용하여 유기전계발광소자(OLED)를 정전류로 구동하는 것과 다르게 박막트랜지스터(TFT)를 온/오프시키는 스위치로 사용하여 유기전계발광소자(OLED)를 구동 방식이었다. As the driving method of the active matrix organic light emitting diode (AMOLED), there are a current driving method, a voltage driving method, and a digital driving method. The digital driving method of the active matrix type organic light emitting diode (AMOLED) turns on the thin film transistor (TFT) unlike the voltage compensation driving method or the current driving method using the thin film transistor to drive the organic light emitting diode (OLED) with a constant current. The organic light emitting display device was used as a switch for turning on / off.

도 1은 종래 액티브 매트릭스형 유기전계발광소자의 등가회로도이다.1 is an equivalent circuit diagram of a conventional active matrix organic light emitting display device.

종래 유기전계발광소자(10)는 p타입 모스 트랜지스터인 제1 및 2박막트랜지스터(T1, T2)와 저장 캐패시터(Cst)를 갖고 있었다. The conventional organic EL device 10 has first and second thin film transistors T1 and T2 and storage capacitors Cst which are p-type MOS transistors.

이때 제1박막트랜지스터(T1)는 스캔라인(12)을 통해 인가되는 스캔신호(Scan 신호)에 따라서 데이터라인(14)을 통해서 입력된 데이터신호(data 신호)를 전달하는 스위칭 박막트랜지스터(switching thin film transistor)이며, 저장 캐패시터(Cst)는 입력된 데이터를 보관하는 저장 캐패시터(storage capacitor)이며, 제2박막트랜지스터(T2)는 입력된 데이터에 따라서 온/오프되어 유기발광 다이오드(OLED)에 전류를 공급하는 스위칭 박막트랜지스터(switching thin film transistor)이었다.In this case, the first thin film transistor T1 is a switching thin film transistor which transmits a data signal input through the data line 14 according to a scan signal applied through the scan line 12. film transistor, the storage capacitor Cst is a storage capacitor that stores the input data, and the second thin film transistor T2 is turned on / off in accordance with the input data so as to provide current to the organic light emitting diode OLED. It was a switching thin film transistor.

도2는 종래 유기전계발광소자의 프레임 구성도이다.2 is a frame diagram of a conventional organic light emitting display device.

도1 및 도 2를 참조하면, 종래 유기정계발광소자(10)의 한 개의 프레임(Frame)은 6비트를 표시하기 위해서 6개의 제1 내지 제6서브필드(SFX 1 내지 SFX 6)를 사용하였다. 이때 각 서브필드(SFX 1 내지 SFX 6)는 어드레스구간과 유지발광구간을 갖고 있었다.1 and 2, one frame of the conventional organic light emitting diode 10 uses six first to sixth subfields SFX 1 to SFX 6 to display 6 bits. . At this time, each subfield SFX 1 to SFX 6 had an address section and a sustain light emission section.

어드레스구간은 모든 서브필드(SF1 내지 SF6)마다 동일하였다. 어드레스구간은 위에서 설명한 바와 같이 제2박막트랜지스터(T2)가 온된 상태에서 데이터신호가 저장 캐패시터(Cst)에 저장되는 구간을 의미하였다. 이때 어드레스구간에는 데이터신호를 저장 캐패시터(Cst)에 저장할 뿐만 아니라 제1박막트랜지스터(T1)에 의해 공급되는 출력전류에 의해 유기발광 다이오드(OLED)가 발광하였다.The address section was the same for all subfields SF1 to SF6. As described above, the address section means a section in which the data signal is stored in the storage capacitor Cst while the second thin film transistor T2 is turned on. In this case, the organic light emitting diode OLED emits light not only by storing the data signal in the storage capacitor Cst but also by the output current supplied by the first thin film transistor T1.

한편, 유지발광구간은 어드레스구간과 별도로 다음 데이터신호가 인가되지 전까지 저장 캐패시터(Cst)에 저장된 데이터신호 또는 데이터전압을 이용하여 제1박막트랜지스터(T1)을 구동하여 유기발광 다이오드(OLED)의 발광을 유지하는 구간이었다. 이 유지발광구간은 바이너리 웨이트(binary weight)를 가졌다. 즉 각각의 서브필드의 유기발광구간은, SF2 = 2*SF1, SF3 = 4*SF1, SF4 = 8*SF1, SF5=16*SF1, SF6=32*SF1이었다. 따라서, 유지발광구간은 상위 계조로 갈수록 길어지고 하위 계조로 갈수록 짧아졌다.On the other hand, the sustain light emitting section drives the first thin film transistor T1 by using the data signal or data voltage stored in the storage capacitor Cst until the next data signal is applied separately from the address section to emit light of the organic light emitting diode OLED. It was a section to maintain. This sustained light emission period had a binary weight. That is, the organic light emitting sections of the respective subfields were SF2 = 2 * SF1, SF3 = 4 * SF1, SF4 = 8 * SF1, SF5 = 16 * SF1, SF6 = 32 * SF1. Therefore, the sustained light emission period became longer toward the upper gray level and shorter toward the lower gray level.

이와 같이 제1박막트랜지스터(T1)를 온/오프시키는 스위치로 사용하여 유기전계발광소자(OLED)를 구동 방식을 액티브 매트릭스형 유기전계발광소자(AMOLED)의 디지털구동방식이라 하였다. As described above, the organic light emitting diode OLED is used as a switch for turning on / off the first thin film transistor T1 to be referred to as a digital driving method of an active matrix organic light emitting diode AMOLED.

도3은 다수의 종래 유기전계발광소자들을 포함하는 유기전계발광 표시장치의 구동 타이밍도이다. 3 is a driving timing diagram of an organic light emitting display device including a plurality of conventional organic light emitting display devices.

도 1 내지 도3을 참조하면, 다수의 종래 유기전계발광소자들(10)을 포함하는 유기전계발광 표시장치는 유기전계발광소자들(10)에 어드레스구간 동안 스캔라인(12)을 통해 스캔신호들(스캔신호1, 스캔신호2, 스캔신호3, 스캔신호4....)을 인가한 상태에서 데이터라인(14)을 통해 데이터신호를 입력하였다. 이후 유지발광구간 동안 데이터신호가 입력된 유기전계발광소자들(10)은 다음 데이터신호가 인가될 때까지 발광상태를 유지하였다. 1 to 3, an organic light emitting display device including a plurality of conventional organic light emitting diodes 10 is connected to a scan signal through a scan line 12 during an address period of the organic light emitting diodes 10. Fields (scan signal 1, scan signal 2, scan signal 3, scan signal 4....) Are inputted through the data line 14. Thereafter, the organic light emitting diodes 10 to which the data signal was input during the sustain light emission period maintained the light emission state until the next data signal was applied.

도2를 통해 설명한 바와 같이 하나의 프레임이 6개의 서브필드로 구성되어 있고 유지발광구간이 바이너리 웨이트(binary weight)를 가진 경우 6개의 서브필드의 유지발광구간의 조합에 따라 유기전계발광소자(10)의 계조를 표현하였다.As described with reference to FIG. 2, when one frame is composed of six subfields and the sustain light emitting section has a binary weight, the organic light emitting display device 10 may be configured according to the combination of the sustain light emitting sections of the six subfields. ) Tones.

그러나 다수의 종래 유기전계발광소자(10)를 포함하는 유기전계발광 표시장치는 첫번째 스캔신호와 마지막 스캔신호가 입력될 때까지 최소 유지발광구간을 형성하므로, 최소 휘도가 큰 문제점이 있었다.However, the organic light emitting display device including a plurality of conventional organic light emitting display devices 10 has a problem in that the minimum luminance is large since the minimum sustain light emitting period is formed until the first scan signal and the last scan signal are input.

특히, 고해상의 유기전계발광 표시장치의 경우 스캔라인들의 숫자가 많아짐에 따라 최소 유지발광구간은 증가하게 되고, 이에 따라 최소 휘도도 증가하는 문제점이 있었다.In particular, in the case of a high resolution organic light emitting display device, as the number of scan lines increases, the minimum sustained light emission period increases, and accordingly, the minimum luminance also increases.

상기 문제점을 해소하기 위해 이루어진 것으로서, 본 발명은 최소 휘도가 작은 유기전계발광소자 및 유기전계발광 표시장치, 그의 구동방법을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an organic light emitting display device, an organic light emitting display device, and a driving method thereof having a small minimum luminance.

또한, 본 발명은 고해상인 경우도 최소 휘도가 증가하지 않는 유기전계발광소자 및 유기전계발광 표시장치, 그의 구동방법을 제공하는데 또다른 목적이 있다.Further, another object of the present invention is to provide an organic light emitting display device, an organic light emitting display device, and a driving method thereof in which the minimum luminance does not increase even in a high resolution.

상기 기술적 과제를 달성하기 위하여, 본 발명은, 데이터라인에 데이터신호를 인가하는 데이터구동부와, 스캔라인에 제1스캔신호와 제2스캔신호를 선택적으로 인가하는 스캔구동부와, 데이터라인과 스캔라인이 교차하는 위치에 다수의 유기전계발광소자를 포함하며, 제1스캔신호에 의해 다수의 유기전계발광소자 전체가 온되며 제2스캔신호가 인가된 상태에서 데이터구동부의 데이터신호에 의해 다수의 유기전계발광소자 중 일부가 선택적으로 오프되는 픽셀회로부를 포함하는 유기전계발광 표시장치를 제공한다.In order to achieve the above technical problem, the present invention provides a data driver for applying a data signal to a data line, a scan driver for selectively applying a first scan signal and a second scan signal to a scan line, and a data line and a scan line. A plurality of organic light emitting diodes are included at the intersections, and a plurality of organic light emitting diodes are turned on by the first scan signal, and the plurality of organic light emitting diodes are turned on by the data signal of the data driver when the second scan signal is applied. Provided is an organic light emitting display device including a pixel circuit part in which some of the electroluminescent elements are selectively turned off.

한편, 스캔라인은 제1스캔신호가 인가되는 제1스캔라인과, 제2스캔신호가 인가되는 제2스캔라인을 포함하며, 스캔구동부는 제1스캔라인에 제1스캔신호를 인가하는 제1스캔구동부와, 제2스캔라인에 제2스캔신호를 인가하는 제2스캔구동부를 포함할 수 있다.The scan line may include a first scan line to which the first scan signal is applied and a second scan line to which the second scan signal is applied, and the scan driver may include a first scan signal to apply the first scan signal to the first scan line. The scan driver may include a scan driver and a second scan driver configured to apply a second scan signal to the second scan line.

또한, 유기전계발광소자는 출력전류에 의해 발광하는 유기발광 다이오드와, 유기발광 다이오드에 출력전류를 공급하는 구동박막트랜지스터부와, 제1스캔신호에 의해 구동박막트랜지스터가 온되도록 선택하는 제1스위칭부와, 제2스캔신호가 인가된 상태에서 데이터신호에 의해 구동박막트랜지스터가 선택적으로 오프되도록 선택하는 제2스위칭부를 포함할 수 있다.In addition, the organic light emitting diode includes an organic light emitting diode that emits light by an output current, a driving thin film transistor portion that supplies an output current to the organic light emitting diode, and a first switching that selects the driving thin film transistor to be turned on by a first scan signal. And a second switching unit for selecting the driving thin film transistor to be selectively turned off by the data signal in a state in which the second scan signal is applied.

또한, 구동박막트랜지스터부, 제2스위칭부는 p타입 모스 트랜지스터이며, 제1스위칭부는 n타입 모스 트랜지스터일 수 있다.In addition, the driving thin film transistor unit and the second switching unit may be a p-type MOS transistor, and the first switching unit may be an n-type MOS transistor.

또한, 제1스위칭부는 구동박막트랜지스터부의 게이트와 제1스위칭부의 게이트 사이에 연결되며 게이트는 제1스캔라인과 접속되어 있고, 제2스위칭부는 데이터라인과 구동박막트랜지스터부 사이에 연결되며 게이트가 제2스캔라인과 접속될 수 있다.In addition, the first switching unit is connected between the gate of the driving thin film transistor unit and the gate of the first switching unit, the gate is connected to the first scanning line, the second switching unit is connected between the data line and the driving thin film transistor unit, and the gate is It can be connected with two scan lines.

또다른 측면에서, 본 발명은 출력전류에 의해 발광하는 유기발광 다이오드와, 전원전압과 유기발광 다이오드 사이에 연결되어 유기발광 다이오드에 출력전류를 공급하는 구동박막트랜지스터부와, 게이트가 제1스캔라인에 접속되어 제1스캔라인을 통해 인가되는 제1스캔신호에 의해 구동박막트랜지스터가 온되도록 선택하는 제1스위칭부와, 데이터라인과 구동박막트랜지스터의 게이트 사이에 연결되며 게이트가 제2 스캔라인에 접속되어 제2스캔라인을 통해 제2스캔신호가 인가된 상태에서 데이터라인을 통해 인가되는 데이터신호에 의해 구동박막트랜지스터가 선택적으로 오프되도록 선택하는 제2스위칭부와, 구동박막트랜지스터의 게이트와 전원전압 사이에 연결되어 데이터신호를 저장하는 저장 캐패시터를 포함하는 유기전계발광소자를 제공한다.In another aspect, the present invention provides an organic light emitting diode that emits light by an output current, a driving thin film transistor portion connected between a power supply voltage and the organic light emitting diode to supply an output current to the organic light emitting diode, and a gate of the first scan line. A first switching unit connected to the first thin film transistor to be turned on by the first scan signal applied through the first scan line, and connected between the data line and the gate of the driving thin film transistor, the gate being connected to the second scan line. A second switching part connected to select the driving thin film transistor to be selectively turned off by a data signal applied through the data line while the second scan signal is applied through the second scan line, the gate and power of the driving thin film transistor Provided is an organic light emitting display device comprising a storage capacitor connected between voltages to store a data signal. All.

이때 구동박막트랜지스터부, 제2스위칭부는 p타입 모스 트랜지스터이며, 제1스위칭부는 n타입 모스 트랜지스터일 수 있다.In this case, the driving thin film transistor unit and the second switching unit may be a p-type MOS transistor, and the first switching unit may be an n-type MOS transistor.

또한, 제1스위칭부는 구동박막트랜지스터부의 게이트와 제1스위칭부의 게이트 사이에 연결되어 제1스캔신호가 인가되면 구동박막트랜지스터부를 온시킬 수 있다.The first switching unit may be connected between the gate of the driving thin film transistor unit and the gate of the first switching unit to turn on the driving thin film transistor unit when the first scan signal is applied.

또다른 측면에서, 본 발명은 제1스캔신호를 입력하여 다수의 유기전계발광소자 전체를 온시키는 제1스캔 입력단계와, 하나의 프레임을 다수의 서브필드로 나누어 제2스캔신호가 입력된 상태에서 데이터신호를 입력하여 다수의 유기전계발광소자를 다수의 서브필드마다 선택적으로 오프시키는 제2스캔단계와, 제2스캔단계 이후 다수의 유기전계발광소자 중 온상태인 유기전계발광소자를 오프시키는 데이터신호가 입력되는 서브필드 이전까지 유기전계발광소자의 온상태를 유지하는 유지발광단계를 포함하는 유기전계발광 표시장치의 구동방법을 제공한다.In another aspect, the present invention provides a first scan input step of turning on a plurality of organic light emitting diodes by inputting a first scan signal, and a state in which a second scan signal is input by dividing one frame into a plurality of subfields. A second scan step of selectively turning off the plurality of organic light emitting diodes for each of the plurality of subfields by inputting a data signal at the second signal; and turning off the organic light emitting diodes in the on state among the plurality of organic light emitting diodes after the second scanning step A method of driving an organic light emitting display device includes a sustain light emitting step of maintaining an on state of an organic light emitting diode until a subfield into which a data signal is input.

이때, 유지발광단계에서, 다수의 서브필드의 유기전계발광소자의 온상태가 유지되는 시간이 다를 수 있다.In this case, in the sustain light emitting step, the time for which the on state of the organic light emitting diodes of the plurality of subfields is maintained may be different.

또한, 유지되는 시간은 하부 서브필드로 갈수록 길어질 수 있다. 한편, 또 한, 프레임은 6개의 서브필드로 구성될 수 있다. In addition, the retention time may be longer toward the lower subfield. Meanwhile, the frame may be composed of six subfields.

또한, 제1스캔신호와 제2스캔신호는 서로 다른 스캔라인을 통해 유기전계발광소자에 입력될 수 있다.In addition, the first scan signal and the second scan signal may be input to the organic light emitting diode through different scan lines.

이하 도면을 참조하여 본 발명의 일실시예를 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도4는 본 발명의 일실시예에 따른 유기전계발광 표시장치의 시스템 구성도이다.4 is a system configuration diagram of an organic light emitting display device according to an embodiment of the present invention.

도 4를 참조하면, 본 발명의 일실시예에 따른 액티브 매트릭스형 유기전계발광 표시장치(30)는 픽셀회로부(32)와 데이터구동부(34), 두개의 스캔구동부(36, 37)를 포함하고 있다.Referring to FIG. 4, the active matrix organic light emitting display device 30 according to an embodiment of the present invention includes a pixel circuit 32, a data driver 34, and two scan drivers 36 and 37. have.

액티브 매트릭스형 유기전계발광 표시장치(30)에는 데이터를 입력시킬 데이터라인(38)을 선택하기 위해서 두개의 스캔라인(39E, 39W)을 통해 순차적으로 제1스캔신호와 제2스캔신호를 출력하는 두개의 제1 및 제2스캔구동부(36, 37)와, 두개의 제1 및 제2스캔구동부(36, 37)에 의해서 선택된 데이터라인(38)에 데이터신호 또는 데이터전압을 입력하는 데이터구동부(34)를 갖고 있다. 이때 데이터구동부(34)는 패널에 구성될 수도 있고 별도로 존재하는 IC로 구성되어 연결될 수도 있다. 또한 데이터구동부(34)도 두개 이상으로 나누어 픽셀회로부(32)에 데이터신호를 공급할 수도 있다.The active matrix organic light emitting display device 30 sequentially outputs a first scan signal and a second scan signal through two scan lines 39E and 39W in order to select a data line 38 to input data. A data driver for inputting a data signal or data voltage to the two first and second scan drivers 36 and 37 and the data line 38 selected by the two first and second scan drivers 36 and 37 ( Has 34). In this case, the data driver 34 may be configured in a panel or may be configured by a separate IC. In addition, the data driver 34 may also be divided into two or more to supply the data signal to the pixel circuit unit 32.

또한, 화면을 표시하는 픽셀회로부(32)에는 매트릭스 형태로 유기전계발광소자들(33)이 다수 형성되어 있다. 픽셀회로부(32)는 데이터라인(38)과 제1, 2스캔 라인(39W, 39E)이 교차하는 위치에 형성된 다수의 유기전계발광소자(33)를 포함한다. 이때 픽셀회로부(32)는 제1스캔신호에 의해 다수의 유기전계발광소자(33) 전체가 온되며 제2스캔신호가 인가된 상태에서 데이터구동부(34)의 데이터신호에 의해 다수의 유기전계발광소자(33) 중 일부가 선택적으로 오프된다. In addition, a plurality of organic light emitting elements 33 are formed in a matrix form in the pixel circuit part 32 displaying the screen. The pixel circuit unit 32 includes a plurality of organic light emitting diodes 33 formed at positions where the data line 38 and the first and second scan lines 39W and 39E cross each other. In this case, the pixel circuit unit 32 is configured to emit a plurality of organic light emitting diodes by the data signal of the data driver 34 in a state in which the entire organic light emitting diodes 33 are turned on by the first scan signal and the second scan signal is applied. Some of the elements 33 are selectively turned off.

도5는 도4의 유기전계발광소자의 등가회로도이다.FIG. 5 is an equivalent circuit diagram of the organic light emitting display device of FIG. 4.

도5를 참조하면, 유기전계발광소자(33)는 제1 내지 3박막트랜지스터(T1 내지 T3)와 1개의 저장 캐패시터(Storage Capacitor, Cst), 유기발광 다이오드(OLED)를 갖는다. 이때 제1박막트랜지스터부(T1) 및 제3박막트랜지스터부(T3)는 p타입 모스 트랜지스터이며, 제2박막트랜지스부는 n타입 모스 트랜지스터이다.Referring to FIG. 5, the organic light emitting diode 33 includes first to third thin film transistors T1 to T3, one storage capacitor Cst, and an organic light emitting diode OLED. In this case, the first thin film transistor portion T1 and the third thin film transistor portion T3 are p-type MOS transistors, and the second thin film transistor portion is an n-type MOS transistor.

유기발광 다이오드(OLED)는 전하수송층 사이에 형성된 유기발광층을 포함하여 전자와 정공의 재결합에 의해 발광한다. 유기발광 다이오드(OLED)는 전원전압(Vdd)와 제1박막트랜지스터(T1) 사이에 형성되어 있다. 이 유기발광 다이오드(OLED)는 제1박막트랜지스터(T1)으로부터 인가되는 출력전류(IOLED)의 양에 대응하는 빛을 발광한다. 유기발광 다이오드(OLED)는 다양한 적층구조와 발광재료로 이루어질 수 있으나 구체적인 설명은 생략한다.The organic light emitting diode OLED includes an organic light emitting layer formed between the charge transport layers and emits light by recombination of electrons and holes. The organic light emitting diode OLED is formed between the power supply voltage Vdd and the first thin film transistor T1. The organic light emitting diode OLED emits light corresponding to the amount of the output current I OLED applied from the first thin film transistor T1. The organic light emitting diode OLED may be formed of various stacked structures and light emitting materials, but a detailed description thereof will be omitted.

제1박막트랜지스터(T1)는 유기발광 다이오드(OLED)와 전원전압(Vdd) 사이에 형성되어 있고, 게이트가 저장 캐패시터(Cst)의 일단에 접속되어 있다. 제1박막트랜지스터(T1)는 유기발광 다이오드(OLED)에 출력전류(IOLED)를 공급하는 구동박막트랜지스터(Driving Transistor)이다. The first thin film transistor T1 is formed between the organic light emitting diode OLED and the power supply voltage Vdd, and a gate thereof is connected to one end of the storage capacitor Cst. The first thin film transistor T1 is a driving thin film transistor that supplies an output current I OLED to the organic light emitting diode OLED.

제2박막트랜지스터(T2)는 제1박막트랜지스터(T1)의 게이트와 제2박막트랜지스터 자체의 게이트 사이에 형성되어 있으며 게이트가 제1스캔라인(39W)에 연결되어 있다. 즉, 제2박막트랜지스터(T2)는 게이트와 드레인이 공통노드에 연결되어 제1스캔라인(39W)를 통해 제2박막트랜지스터(T2)의 게이트에 제1스캔신호가 인가되면 제1박막트랜지스터(T1)은 온상태가 되어 출력전류(IOLED)를 유기발광 다이오드(OLED)에 공급한다. The second thin film transistor T2 is formed between the gate of the first thin film transistor T1 and the gate of the second thin film transistor itself, and the gate is connected to the first scan line 39W. That is, when the gate and the drain of the second thin film transistor T2 are connected to the common node and the first scan signal is applied to the gate of the second thin film transistor T2 through the first scan line 39W, the first thin film transistor T2 T1) is turned on to supply the output current I OLED to the organic light emitting diode OLED.

따라서, 본 발명의 일실시예에 따른 유기전계발광 표시장치(30)는 제1스캔라인(39W)을 통해 제1스캔신호가 인가되면 픽셀회로부(32)의 모든 유기전계발광소자들(33)이 온상태가 되어 발광한다. 제1스캔신호에 의해 픽셀회로부(32)의 제1스캔라인(39W)과 접속된 모든 유기전계발광소자(33)가 온되는 시간을 본 명세서에서 풀온구간(full on time)이라 한다.Therefore, in the organic light emitting display device 30 according to the exemplary embodiment of the present invention, when the first scan signal is applied through the first scan line 39W, all the organic light emitting diodes 33 of the pixel circuit unit 32 are applied. It turns on and emits light. The time when all the organic light emitting elements 33 connected to the first scan line 39W of the pixel circuit unit 32 are turned on by the first scan signal is referred to herein as a full on time.

제3박막트랜지스터(T3)는 제1박막트랜지스터(T1)의 게이트와 데이터라인(38) 사이에 연결되어 있으며, 게이트가 제2스캔라인(39E)에 접속되어 제2스캔라인(39E)을 통해 인가되는 제2스캔신호에 의해 온/오프된다. The third thin film transistor T3 is connected between the gate of the first thin film transistor T1 and the data line 38, and the gate is connected to the second scan line 39E and through the second scan line 39E. It is turned on / off by the applied second scan signal.

따라서, 온신호인 제2스캔신호가 게이트에 인가된 상태에서 데이터라인(38)을 통해 데이터신호가 인가되면, 제3박막트랜지스터(T3)는 데이터신호를 제1박막트랜지스터(T1)의 게이트에 전달한다. 제1박막트랜지스터(T1)의 게이트에 전달된 데이터신호에 의해 제1박막트랜지스터(T1)는 제1스캔신호에 의해 출력전류(IOLED)를 유기발광 다이오드(OLED)에 공급하는 것을 중단하게 된다. 한편, 제1박막트랜지스터 (T1)의 게이트에 전달된 데이터신호 또는 데이터전압은 다음 데이터신호가 게이트에 인가될 때까지 계속해서 출력전류(IOLED)를 유기발광 다이오드(OLED)에 공급하는 것을 중단하게 된다. 소거 데이터신호가 인가되어 유기발광 다이오드(OLDE)의 발광을 제거하는 시간을 본 명세서에서 제거구간이라 한다.Therefore, when the data signal is applied through the data line 38 while the second scan signal, which is an on signal, is applied to the gate, the third thin film transistor T3 transmits the data signal to the gate of the first thin film transistor T1. To pass. By the data signal transmitted to the gate of the first thin film transistor T1, the first thin film transistor T1 stops supplying the output current I OLED to the organic light emitting diode OLED by the first scan signal. . On the other hand, the data signal or data voltage transmitted to the gate of the first thin film transistor T1 continues to stop supplying the output current I OLED to the organic light emitting diode OLED until the next data signal is applied to the gate. Done. The time for removing the light emission of the organic light emitting diode (OLDE) by applying the erase data signal is referred to herein as a removal section.

데이터신호가 인가되지 않을 경우 유기발광 다이오드(OLED)는 발광을 유지하게 되는데 이 시간을 본 명세서에서 유지발광구간이라 한다.When the data signal is not applied, the organic light emitting diode OLED maintains light emission. This time is referred to as a sustain light emitting period in the present specification.

도6은 제1스캔신호 입력시 도5의 유기전계발광소자의 작동도이며, 도7은 제2스캔신호 입력시 도5의 유기전계발광소자의 작동도이다.6 is an operation diagram of the organic light emitting display device of FIG. 5 when a first scan signal is input, and FIG. 7 is an operation diagram of the organic light emitting device of FIG. 5 when a second scan signal is input.

도6을 참조하면, 유기전계발광소자(33)의 제2박막트랜지스터(T2)는 제1스캔신호가 제2박막트랜지스터(T2)의 게이트에 인가되면 온상태가 된다. 제2박막트랜지스터(T2)가 온상태가 되면, 제1박막트랜지스터(T1)는 자동적으로 온상태가 되어 풀온구간 동안 유기발광 다이오드(OLED)에 출력전류(IOLED)를 공급한다.Referring to FIG. 6, the second thin film transistor T2 of the organic light emitting diode 33 is turned on when the first scan signal is applied to the gate of the second thin film transistor T2. When the second thin film transistor T2 is turned on, the first thin film transistor T1 is automatically turned on to supply the output current I OLED to the organic light emitting diode OLED during the full on period.

도7을 참조하면, 유기전계발광소자(33)의 제3박막트랜지스터(T3)는 제2스캔신호에 의해 온상태가 되어 소거 데이터신호를 제1박막트랜지스터(T1)에 제공한다. 제1박막트랜지스터(T1)은 소거 데이터신호에 의해 오프상태가 되어 유기발광 다이오드(OLED)에 출력전류(IOLED)의 공급을 중단하게 된다.Referring to FIG. 7, the third thin film transistor T3 of the organic light emitting diode 33 is turned on by the second scan signal to provide the erase data signal to the first thin film transistor T1. The first thin film transistor T1 is turned off by the erase data signal to stop the supply of the output current I OLED to the organic light emitting diode OLED.

만약 소거 데이터신호가 제1박막트랜지스터(T1)에 공급되지 않으면 유기발광 다이오드(OLED)는 유지발광구간 동안 발광을 유지하게 된다.If the erase data signal is not supplied to the first thin film transistor T1, the organic light emitting diode OLED maintains light emission during the sustain light emission period.

도8은 도4의 제2스캔구동부의 구성도이다.8 is a configuration diagram of the second scan driver of FIG. 4.

도4 및 도8을 참조하면, 위에서 설명한 바와 같이 제2스캔구동부(37)는 제2스캔라인(39E)와 연결되어 제2스캔신호를 픽셀회로부(32)의 유기전계발광소자(33)에 제공한다. 4 and 8, as described above, the second scan driver 37 is connected to the second scan line 39E to transmit the second scan signal to the organic light emitting diode 33 of the pixel circuit 32. to provide.

제2스캔구동부(37)은 미도시한 타이밍 컨트롤러로부터 스캔제어신호를 인가받아 다수의 제2스캔라인들에 제2스캔신호를 제공하기 위해 쉬프트레지스터(42)와 레벨쉬프트(44), 출력버퍼(46)를 포함하고 있다. 한편, 제1스캔구동부(36)도 제2스캔구동부(37)와 동일한 구성을 갖는다.The second scan driver 37 receives a scan control signal from a timing controller (not shown) to provide a second scan signal to the plurality of second scan lines, the shift register 42, the level shift 44, and the output buffer. It contains (46). On the other hand, the first scan driver 36 also has the same configuration as the second scan driver 37.

도9는 도4의 유기전계발광소자의 프레임 구성도이다.FIG. 9 is a frame diagram illustrating an organic light emitting display device of FIG. 4.

도9을 참조하면, 하나의 프레임은 6개의 제1 내지 6서브필드(SF1 내지 SF6)로 구성되어 있다. 이때 제1서브필드는 풀온구간(도9의 A구간)과 유지발광구간(도9의 B구간)을 포함하며, 제2내지 6서브필드는 유지발광구간만을 포함한다. 한편, 유지발광구간(B구간)은 제거 데이터신호가 인가되어 발광이 중단될 때 제거구간(B')과 비발광구간(B'')으로 구분되게 된다. 물론, 유지발광구간(B구간)은 제거 데이터신호가 인가되지 않을 경우 발광이 유지된다.Referring to FIG. 9, one frame includes six first to sixth subfields SF1 to SF6. In this case, the first subfield includes a pull-on section (section A in FIG. 9) and a sustain light emitting section (section B in FIG. 9), and the second to six subfields include only a sustain light emitting section. On the other hand, the sustain light emitting section (B section) is divided into a removing section (B ') and a non-light emitting section (B' ') when the light emission is stopped by the removal data signal is applied. Of course, in the sustain light emission section (Section B), light emission is maintained when the removal data signal is not applied.

한편, 유지발광구간(B)은 바이너리 웨이트(binary weight)를 가지며, 6개의 서브필드의 유지발광구간의 조합에 따라 유기전계발광소자(33)의 계조를 표현한다. 즉, 서브필드의 유기발광구간(B)은, SF2 = 2*SF1, SF3 = 4*SF1, SF4 = 8*SF1, SF5=16*SF1, SF6=32*SF1이다. 따라서, 유지발광구간(B)은 상위 계조로 갈수록 길어지고 하위 계조로 갈수록 짧다.On the other hand, the sustain light emitting section B has a binary weight and expresses the gray level of the organic light emitting element 33 according to the combination of the sustain light emitting sections of the six subfields. That is, the organic light emitting section B of the subfield is SF2 = 2 * SF1, SF3 = 4 * SF1, SF4 = 8 * SF1, SF5 = 16 * SF1, SF6 = 32 * SF1. Therefore, the sustain light emission period B is longer toward the upper gray level and shorter toward the lower gray level.

도10은 본 발명의 일실시예에 따른 유기전계발광 표시장치의 구동 타이밍도 이다.10 is a driving timing diagram of an organic light emitting display device according to an embodiment of the present invention.

도10을 참조하면, 제1스캔신호와 제2스캔신호가 제1스캔구동부(36)과 제2스캔구동부(37)로부터 픽셀회로부(32)의 유기전계발광소자(33)에 순차적으로 다수의 제1 및 2스캔라인들(39E, 39W)을 통해 공급된다. 제1서브필드에는 제1스캔신호와 제2스캔신호가 모두 순차적으로 제1 및 2스캔라인들(39E, 39W)에 공급되지만, 제2서브필드부터는 제2스캔신호만이 공급되어 제1서브필드에서 제1스캔신호에 의해 유기전계발광소자들(33)을 모두 온시킨 후 제2스캔신호에 동기된 소거 데이터신호에 의해 제1서브필드부터 선택적으로 오프시키므로 제1 내지 6서브필드의 조합에 의해 유기전계발광소자들(33)의 계조를 표현하게 된다.Referring to FIG. 10, a plurality of first scan signals and second scan signals are sequentially transmitted from the first scan driver 36 and the second scan driver 37 to the organic light emitting diodes 33 of the pixel circuit 32. It is supplied through the first and second scan lines 39E and 39W. Both the first scan signal and the second scan signal are sequentially supplied to the first and second scan lines 39E and 39W in the first subfield, but only the second scan signal is supplied from the second subfield to the first subfield. Combination of the first to sixth subfields because the organic light emitting elements 33 are all turned on by the first scan signal in the field and then selectively turned off from the first subfield by the erase data signal synchronized with the second scan signal. By this, the gray level of the organic light emitting diodes 33 is expressed.

이때, 도10에서 제1,2스캔신호클럭(Sclk, Eclk)은 각각 제1스캔신호와 제2스캔신호에 사용되는 클럭들이며, 제1,2스캔동기신호(Svst, Evst)는 초기 시작 동기신호로 각각의 스캔라인의 클럭과 동기하여 스캔라인에서 순차적인 출력을 내보낸다.At this time, in FIG. 10, the first and second scan signal clocks Sclk and Eclk are clocks used for the first and second scan signals, respectively, and the first and second scan synchronous signals Svst and Evst are initial start synchronization. The signal produces a sequential output from the scanline in synchronization with the clock of each scanline.

결과적으로 본 발명의 일실시예에 따른 유기전계발광 표시장치(30)는 풀온구간(A) 동안 전체 유기전계발광소자들(33)을 풀온시킨 직후 제거시간(B') 동안 제거 데이터신호에 의해 선택적으로 오프 또는 제거하므로 최소 계조의 크기를 낮출 수 있다.As a result, the organic light emitting display device 30 according to the exemplary embodiment of the present invention is driven by the removal data signal during the removal time B ′ immediately after the entire organic light emitting elements 33 are pulled on during the pull-on period A. FIG. It can be selectively turned off or removed to reduce the minimum gray scale.

이상 첨부된 도면을 참조하여 본 발명의 실시예를 설명하였지만, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 본 발명의 그 기술적 사상이나 필수적인 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 따라서 이상에서 기술한 실시예들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이므로, 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해해야만 하며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다.Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. I can understand that. Therefore, since the embodiments described above are provided to fully inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

이러한 구성에 의하여 본 발명은 발광한 직후 선택적으로 소거하여 휘도를 표현하므로 최소 휘도가 작은 효과가 있다.With this configuration, the present invention selectively erases immediately after emitting light to express luminance, so that the minimum luminance is small.

또한, 본 발명은 고해상인 경우도 최소 휘도가 증가하지 않는 효과가 있다.In addition, the present invention has the effect that the minimum luminance does not increase even in high resolution.

이에 따라 유기전계발광 표시장치와 유기전계발광소자의 계조표현 능력을 향상시킬 수 있다.Accordingly, the gray scale display capability of the organic light emitting display device and the organic light emitting display device can be improved.

Claims (13)

데이터라인에 데이터신호를 인가하는 데이터구동부와;A data driver for applying a data signal to the data line; 스캔라인에 제1스캔신호와 제2스캔신호를 선택적으로 인가하는 스캔구동부와;A scan driver for selectively applying a first scan signal and a second scan signal to the scan line; 상기 데이터라인과 상기 스캔라인이 교차하는 위치에 다수의 유기전계발광소자를 포함하며, 상기 제1스캔신호에 의해 상기 다수의 유기전계발광소자 전체가 온되며 상기 제2스캔신호가 인가된 상태에서 상기 데이터구동부의 데이터신호에 의해 상기 다수의 유기전계발광소자 중 일부가 선택적으로 오프되는 픽셀회로부를 포함하는 유기전계발광 표시장치.And a plurality of organic light emitting diodes at positions where the data line and the scan line cross each other, wherein the plurality of organic light emitting diodes are turned on by the first scan signal and the second scan signal is applied. And a pixel circuit unit in which some of the plurality of organic light emitting diodes are selectively turned off by data signals of the data driver. 제1항에 있어서,The method of claim 1, 상기 스캔라인은 상기 제1스캔신호가 인가되는 제1스캔라인과, 상기 제2스캔신호가 인가되는 제2스캔라인을 포함하며,The scan line includes a first scan line to which the first scan signal is applied, and a second scan line to which the second scan signal is applied. 상기 스캔구동부는 상기 제1스캔라인에 상기 제1스캔신호를 인가하는 제1스캔구동부와, 상기 제2스캔라인에 상기 제2스캔신호를 인가하는 제2스캔구동부를 포함하는 것을 특징으로 하는 유기전계발광 표시장치.The scan driver may include a first scan driver to apply the first scan signal to the first scan line, and a second scan driver to apply the second scan signal to the second scan line. Electroluminescent display. 제1항에 있어서,The method of claim 1, 상기 유기전계발광소자는 The organic light emitting device is 출력전류에 의해 발광하는 유기발광 다이오드와;An organic light emitting diode emitting light by an output current; 상기 유기발광 다이오드에 상기 출력전류를 공급하는 구동박막트랜지스터부와;A driving thin film transistor unit supplying the output current to the organic light emitting diode; 상기 제1스캔신호에 의해 상기 구동박막트랜지스터가 온되도록 선택하는 제1스위칭부와;A first switching unit selecting the driving thin film transistor to be turned on by the first scan signal; 상기 제2스캔신호가 인가된 상태에서 상기 데이터신호에 의해 상기 구동박막트랜지스터가 선택적으로 오프되도록 선택하는 제2스위칭부를 포함하는 유기전계발광 표시장치.And a second switching unit which selects the driving thin film transistor to be selectively turned off by the data signal while the second scan signal is applied to the organic light emitting display device. 제3항에 있어서,The method of claim 3, 상기 구동박막트랜지스터부 및 상기 제2스위칭부는 p타입 모스 트랜지스터이며, 상기 제1스위칭부는 n타입 모스 트랜지스터인 것을 특징으로 하는 유기전계발광 표시장치.And the driving thin film transistor portion and the second switching portion are p-type MOS transistors, and wherein the first switching portion is an n-type MOS transistor. 제3항 또는 제4항에 있어서,The method according to claim 3 or 4, 상기 제1스위칭부는 상기 구동박막트랜지스터부의 게이트와 상기 제1스위칭부의 게이트 사이에 연결되며 게이트는 상기 제1스캔라인과 접속되어 있고, The first switching unit is connected between the gate of the driving thin film transistor unit and the gate of the first switching unit, the gate is connected to the first scan line, 상기 제2스위칭부는 상기 데이터라인과 상기 구동박막트랜지스터부 사이에 연결되며 게이트가 제2스캔라인과 접속되어 있는 것을 특징으로 하는 유기전계발광 표시장치.And the second switching unit is connected between the data line and the driving thin film transistor unit and a gate is connected to the second scan line. 출력전류에 의해 발광하는 유기발광 다이오드와;An organic light emitting diode emitting light by an output current; 전원전압과 상기 유기발광 다이오드 사이에 연결되어 상기 유기발광 다이오드에 상기 출력전류를 공급하는 구동박막트랜지스터부와;A driving thin film transistor unit connected between a power supply voltage and the organic light emitting diode to supply the output current to the organic light emitting diode; 게이트가 제1스캔라인에 접속되어 상기 제1스캔라인을 통해 인가되는 제1스캔신호에 의해 상기 구동박막트랜지스터가 온되도록 선택하는 제1스위칭부와;A first switching part connected to a first scan line and selecting the driving thin film transistor to be turned on by a first scan signal applied through the first scan line; 데이터라인과 상기 구동박막트랜지스터의 게이트 사이에 연결되며 게이트가 제2스캔라인에 접속되어 상기 제2스캔라인을 통해 제2스캔신호가 인가된 상태에서 상기 데이터라인을 통해 인가되는 데이터신호에 의해 상기 구동박막트랜지스터가 선택적으로 오프되도록 선택하는 제2스위칭부와;The data line is connected between the data line and the gate of the driving thin film transistor, and the gate is connected to the second scan line and the data signal is applied through the data line while the second scan signal is applied through the second scan line. A second switching unit which selects the driving thin film transistor to be selectively turned off; 상기 구동박막트랜지스터의 게이트와 상기 전원전압 사이에 연결되어 상기 데이터신호를 저장하는 저장 캐패시터를 포함하는 유기전계발광소자.And a storage capacitor connected between the gate of the driving thin film transistor and the power supply voltage to store the data signal. 제6항에 있어서,The method of claim 6, 상기 구동박막트랜지스터부 및 상기 제2스위칭부는 p타입 모스 트랜지스터이며, 상기 제1스위칭부는 n타입 모스 트랜지스터인 것을 특징으로 하는 유기전계발광 표시장치.And the driving thin film transistor portion and the second switching portion are p-type MOS transistors, and wherein the first switching portion is an n-type MOS transistor. 제6항 또는 제7항에 있어서,The method according to claim 6 or 7, 상기 제1스위칭부는 상기 구동박막트랜지스터부의 게이트와 상기 제1스위칭 부의 게이트 사이에 연결되어 상기 제1스캔신호가 인가되면 상기 구동박막트랜지스터부를 온시키는 것을 특징으로 하는 유기전계발광소자.And the first switching unit is connected between the gate of the driving thin film transistor unit and the gate of the first switching unit to turn on the driving thin film transistor unit when the first scan signal is applied. 제1스캔신호를 입력하여 다수의 유기전계발광소자 전체를 온시키는 제1스캔 입력단계와;A first scan input step of inputting a first scan signal to turn on a plurality of organic light emitting diodes; 하나의 프레임을 다수의 서브필드로 나누어 제2스캔신호가 입력된 상태에서 데이터신호를 입력하여 상기 다수의 유기전계발광소자를 상기 다수의 서브필드마다 선택적으로 오프시키는 제2스캔단계와;A second scan step of dividing one frame into a plurality of subfields and selectively turning off the plurality of organic light emitting diodes for each of the plurality of subfields by inputting a data signal while a second scan signal is input; 상기 제2스캔단계 이후 상기 다수의 유기전계발광소자 중 온상태인 유기전계발광소자를 오프시키는 데이터신호가 입력되는 서브필드 이전까지 상기 유기전계발광소자의 온상태를 유지하는 유지발광단계를 포함하는 유기전계발광 표시장치의 구동방법. And a sustain light emitting step of maintaining the on state of the organic light emitting element after the second scanning step until the subfield in which the data signal for turning off the organic light emitting elements of the plurality of organic light emitting elements is turned off. A method of driving an organic light emitting display device. 제9항에 있어서,The method of claim 9, 상기 유지발광단계에서, 상기 다수의 서브필드의 상기 유기전계발광소자의 온상태가 유지되는 시간이 다른 것을 특징으로 하는 유기전계발광 표시장치의 구동방법.And the time period during which the on state of the organic light emitting diodes of the plurality of subfields is kept different is different in the sustain light emitting step. 제10항에 있어서,The method of claim 10, 상기 유지되는 시간은 하부 서브필드로 갈수록 길어지는 것을 특징으로 하 는 유기전계발광 표시장치의 구동방법. And the holding time is longer toward the lower subfield. 제10항 또는 제11항에 있어서,The method according to claim 10 or 11, wherein 상기 프레임은 6개의 서브필드로 구성된 것을 특징으로 하는 유기전계발광 표시장치의 구동방법.And the frame is composed of six subfields. 제10항 또는 제11항에 있어서,The method according to claim 10 or 11, wherein 상기 제1스캔신호와 상기 제2스캔신호는 서로 다른 스캔라인을 통해 상기 유기전계발광소자에 입력되는 것을 특징으로 하는 유기전계발광 표시장치의 구동방법.And the first scan signal and the second scan signal are input to the organic light emitting diode through different scan lines.
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KR101048994B1 (en) * 2009-01-29 2011-07-12 삼성모바일디스플레이주식회사 Organic electroluminescence display device and driving method thereof
US8736597B2 (en) 2010-12-10 2014-05-27 Samsung Display Co., Ltd. Pixel for display device, display device, and driving method thereof
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KR20020089923A (en) * 2001-05-25 2002-11-30 주식회사 엘리아테크 Driving circuit of organic electro luminescence display element
KR100620323B1 (en) * 2001-05-29 2006-09-13 엘지.필립스 엘시디 주식회사 organic electroluminescence display and driving circuit thereof
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KR101048994B1 (en) * 2009-01-29 2011-07-12 삼성모바일디스플레이주식회사 Organic electroluminescence display device and driving method thereof
US8988321B2 (en) 2009-01-29 2015-03-24 Samsung Display Co., Ltd. Organic light emitting display device including a plurality of scan driving circuits for driving scan signals corresponding to image signals and black image signals and method of driving the same
US8736597B2 (en) 2010-12-10 2014-05-27 Samsung Display Co., Ltd. Pixel for display device, display device, and driving method thereof
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