KR101451583B1 - Organic light emitting diode display - Google Patents
Organic light emitting diode display Download PDFInfo
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- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
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- 102100040841 C-type lectin domain family 5 member A Human genes 0.000 description 8
- 101150008824 CLEC5A gene Proteins 0.000 description 8
- 101150056111 MDL1 gene Proteins 0.000 description 8
- 101100386697 Magnaporthe oryzae (strain 70-15 / ATCC MYA-4617 / FGSC 8958) DCL1 gene Proteins 0.000 description 8
- 101150095628 MDL2 gene Proteins 0.000 description 7
- 101100062770 Magnaporthe oryzae (strain 70-15 / ATCC MYA-4617 / FGSC 8958) DCL2 gene Proteins 0.000 description 7
- 101100500048 Arabidopsis thaliana DRP3A gene Proteins 0.000 description 6
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- 239000011147 inorganic material Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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- 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]
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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]
- G09G3/3225—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
- G09G3/3258—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 voltage across the light-emitting element
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/10—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration
- H01L27/118—Masterslice integrated circuits
- H01L27/11803—Masterslice integrated circuits using field effect technology
- H01L27/11807—CMOS gate arrays
- H01L2027/11868—Macro-architecture
- H01L2027/11874—Layout specification, i.e. inner core region
- H01L2027/11879—Data lines (buses)
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Abstract
본 발명은 신호라인들의 분기를 용이하게 실현할 수 있는 유기전계발광표시장치에 관한 것으로, 외부로부터의 신호라인들로부터 신호를 공급받아 구동전류를 생성하는 화소회로; 및 상기 화소회로로부터의 구동전류에 따라 발광하는 발광소자를 포함하며; 상기 신호라인들 중 적어도 어느 하나의 신호라인으로부터 적어도 2개의 대 분기라인이 분기되고, 각 대 분기라인이 상기 화소회로의 일측 및 타측에 위치하며, 상기 각 대 분기라인으로부터 분기된 다수의 소 분기라인들이 상기 화소회로에 접속된 것을 그 특징으로 한다.The present invention relates to an organic light emitting display capable of easily realizing the branching of signal lines, and more particularly, to a pixel circuit for generating a driving current by receiving a signal from external signal lines; And a light emitting element that emits light in accordance with a driving current from the pixel circuit; At least two branch lines are branched from at least any one of the signal lines, each branch line is located at one side and the other side of the pixel circuit, and a plurality of sub branches And the lines are connected to the pixel circuit.
발광소자, 유기전계발광표시장치, 화소회로, 분기라인 A light emitting element, an organic light emitting display, a pixel circuit, a branch line
Description
본 발명은 유기발광다이오드 표시장치에 관한 것으로, 특히 신호라인들의 분기를 용이하게 실현할 수 있는 유기전계발광표시장치에 대한 것이다.BACKGROUND OF THE
근래에 음극선관과 비교하여 무게와 부피가 작은 각종 평판 표시장치들이 개발되고 있으며 특히 발광효율, 휘도 및 시야각이 뛰어나며 응답속도가 빠른 발광 표시장치가 주목 받고 있다.2. Description of the Related Art Various flat panel display devices having smaller weight and volume than those of a cathode ray tube have been developed in recent years. Particularly, a light emitting display device having excellent luminous efficiency, luminance and viewing angle and fast response speed has been attracting attention.
발광소자는 빛을 발산하는 박막인 발광층이 캐소드 전극과 애노드 전극 사이에 위치하는 구조를 갖고 발광층에 전자 및 정공을 주입하여 이들을 재결합시킴으로써 여기자가 생성되며 여기자가 낮은 에너지로 떨어지면서 발광하는 특성을 가지고 있다.The light emitting device has a structure in which a light emitting layer, which is a thin film that emits light, is positioned between the cathode electrode and the anode electrode, and excitons are generated by injecting electrons and holes into the light emitting layer and recombining them, have.
이러한 발광소자는 발광층이 무기물 또는 유기물로 구성되며, 발광층의 종류에 따라 무기 발광소자와 유기 발광소자로 구분한다.In such a light emitting device, the light emitting layer is made of an inorganic material or an organic material, and is classified into an inorganic light emitting device and an organic light emitting device depending on the type of the light emitting layer.
이러한 발광소자를 사용한 유기전계발광표시장치는 다수의 화소를 포함한다. 이 화소 각각에는 상기 발광소자와 상기 발광소자에 구동전류를 공급하기 위한 화소회로를 포함한다.An organic light emitting display using such a light emitting device includes a plurality of pixels. Each of the pixels includes a pixel circuit for supplying a driving current to the light emitting element and the light emitting element.
종래에는 하나의 발광제어라인이 한 수평라인들내의 화소회로의 일측에 위치하고, 이 발광제어라인으로부터 다수의 분기라인들이 화소회로의 상측을 향해 분기되는 방식이어서, 분기라인들이 많을 경우 상기 분기라인들을 화소회로측으로 분기하기가 불가능하였다.Conventionally, one emission control line is located at one side of the pixel circuit in one horizontal line, and a plurality of branch lines are branched toward the top of the pixel circuit from the emission control line. Therefore, when there are many branch lines, It was impossible to branch to the pixel circuit side.
본 발명은 상기와 같은 문제점을 해결하기 위하여 안출한 것으로, 신호라인을 두 개의 대 분기라인으로 분기시키고, 이 분기된 각 대 분기라인을 화소회로의 일측 및 타측에 위치시키고, 이 각 대 분기라인으로부터 화소회로의 일측 및 타측을 향해 분기되는 다수의 소 분기라인들을 형성함으로써 신호라인들의 분기를 용이하게 실현할 수 있는 유기전계발광표시장치를 제공하는 데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above problems, and it is an object of the present invention to provide a liquid crystal display device which divides a signal line into two large branch lines, places each branched line on one side and the other side of a pixel circuit, An organic light emitting display device capable of easily realizing the branching of signal lines by forming a plurality of sub branch lines which branch from one side of the pixel circuit to the other side.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 유기전계발광표시장치는 외부로부터의 신호라인들로부터 신호를 공급받아 구동전류를 생성하는 화소회로; 및 상기 화소회로로부터의 구동전류에 따라 발광하는 발광소자를 포함하며; 상기 신호라인들 중 적어도 어느 하나의 신호라인으로부터 적어도 2개의 대 분기라인이 분기되고, 각 대 분기라인이 상기 화소회로의 일측 및 타측에 위치하며, 상기 각 대 분기라인으로부터 분기된 다수의 소 분기라인들이 상기 화소회로에 접속된 것을 그 특징으로 한다.According to an aspect of the present invention, there is provided an organic light emitting display including: a pixel circuit receiving a signal from an external signal line to generate a driving current; And a light emitting element that emits light in accordance with a driving current from the pixel circuit; At least two branch lines are branched from at least any one of the signal lines, each branch line is located at one side and the other side of the pixel circuit, and a plurality of sub branches And the lines are connected to the pixel circuit.
상기 화소회로는, 스캔 라인으로부터의 스캔 신호에 따라 데이터 라인과 제 1 노드간을 접속시키는 제 1 스위칭소자; 상기 신호라인으로부터 분기된 제 1 대 분기라인 및 제 1 소 분기라인으로부터의 발광제어신호에 따라 기준전압전송라인과 제 1 노드간을 접속시키는 제 2 스위칭소자; 상기 스캔 라인으로부터의 스캔 신호에 따라 제 2 노드와 제 3 노드간을 접속시키는 제 3 스위칭소자; 상기 제 1 노드 와 제 2 노드간에 접속된 커패시터; 상기 제 2 노드의 전압에 따라 고전위전송라인으로부터 제 3 노드를 향해 흐르는 발광전류의 크기를 제어하는 구동 스위칭소자; 및, 상기 신호라인으로부터 분기된 제 2 대 분기라인 및 제 2 소 분기라인으로부터의 발광제어신호에 따라 상기 제 3 노드와 상기 발광소자간을 접속시키는 제 4 스위칭소자를 포함함을 특징으로 한다.The pixel circuit includes a first switching device for connecting a data line and a first node according to a scan signal from the scan line; A second switching element for connecting a reference voltage transmission line and a first node in accordance with a light emission control signal from a first main branch line and a first sub branch line branched from the signal line; A third switching device for connecting a second node and a third node according to a scan signal from the scan line; A capacitor connected between the first node and the second node; A drive switching element for controlling a magnitude of a light emission current flowing from the high-potential transmission line toward the third node according to the voltage of the second node; And a fourth switching element for connecting the third node and the light emitting element according to a light emission control signal from the second major branch line and the second sub branch line branched from the signal line.
본 발명에 따른 유기전계발광표시장치에는 다음과 같은 효과가 있다.The organic electroluminescent display device according to the present invention has the following effects.
본 발명에 따른 유기전계발광표시장치는 신호라인을 두 개의 대 분기라인으로 분기시키고, 이 분기된 각 대 분기라인을 화소회로의 일측 및 타측에 위치시키고, 이 각 대 분기라인으로부터 화소회로의 일측 및 타측을 향해 분기되는 다수의 소 분기라인들을 형성함으로써 신호라인들의 분기를 용이하게 실현할 수 있다.The organic light emitting display device according to the present invention is characterized in that the signal line is branched into two branch lines, the branch lines are located on one side and the other side of the pixel circuit, And a plurality of sub branch lines branched toward the other side, so that branching of the signal lines can be easily realized.
이하, 첨부된 도면을 참조하여 본 발명에 따른 유기전계발광표시장치를 상세히 설명하면 다음과 같다.Hereinafter, an organic light emitting display device according to the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 발광 표시장치를 나타내는 도면이다. 1 is a view showing a light emitting display device according to the present invention.
도 1을 참조하면, 본 발명에 따른 유기전계발광표시장치는 데이터 전압(Data)이 공급되는 m(단, m은 자연수)개의 데이터 라인(DL1 내지 DLm)과, 스캔 신호가 공급되는 n(단, n은 m과 다른 자연수)개의 스캔 라인(SL1 내지 SLn)과, 제 1 구동전원(VDD)이 공급되는 제 1 구동전원 라인(미도시)과, 제 2 구동전원(VSS)이 공급되는 제 2 구동전원 라인(미도시)과, 발광제어신호(Vc)가 공급되는 제어신호 라인(미도시)과, 다수의 화소셀(PXL)들을 포함하는 표시부(100)와, 각 스캔 라인(SL1 내지 SLn)을 구동하기 위한 스캔 드라이버(200)와, 그리고 각 데이터 라인(DL1 내지 DLm)에 데이터 전압(Data)을 공급하기 위한 데이터 드라이버(300)를 포함하여 구성된다.1, an organic light emitting display according to an embodiment of the present invention includes m data lines DL1 through DLm (where m is a natural number) to which a data voltage Data is supplied, a first driving power supply line (not shown) to which the first driving power VDD is supplied and a second driving power supply line (not shown) to which the second driving power VSS is supplied (Not shown), a control signal line (not shown) to which a light emission control signal Vc is supplied, a
스캔 드라이버(200)는 도시하지 않은 스타트 펄스와 클럭신호를 이용하여 스캔 신호를 생성하고, 생성된 스캔 신호를 각 스캔 라인(SL1 내지 SLn)에 공급한다. The
데이터 드라이버(300)는 도시하지 않은 데이터 제어신호들에 따라 데이터 전압(Data)을 생성하여 각 데이터 라인(DL1 내지 DLm)에 공급한다. 이때, 데이터 드라이버(300)는 1수평기간마다 1수평라인 분씩의 데이터 전압(Data)을 각 데이터 라인(DL1 내지 DLm)에 공급한다. The
한 수평라인내의 m개의 화소셀(PXL)들은 하나의 스캔 라인에 공통으로 접속됨과 아울러 m개의 데이터 라인에 개별적으로 접속된다. 예를 들어, 제 1 수평라인(HL1)을 따라 배열된 제 1 내지 제 m 화소셀(PXL)들은 모두 제 1 스캔 라인(SL1)에 공통으로 접속됨과 아울러 제 1 내지 제 m 데이터 라인(DL1 내지 DLm)에 각각 개별적으로 접속된다. 다시 말하여, 제 1 수평라인(HL1)의 제 1 화소셀(PXL)은 제 1 데이터 라인(DL1)에 접속되며, 제 1 수평라인(HL1)의 제 2 화소셀(PXL)은 제 2 데이터 라인(DL2)에 접속되며, 제 1 수평라인(HL1)의 제 3 화소셀(PXL)은 제 3 데이터 라인(DL3)에 접속되며, ..., 그리고 제 1 수평라인(HL1)의 제 m 화소셀(PXL)은 제 m 데이터 라인(DLm)에 접속된다. M pixel cells PXL in one horizontal line are commonly connected to one scan line and individually connected to m data lines. For example, the first to m-th pixel cells PXL arranged along the first horizontal line HL1 are commonly connected to the first scan line SL1, and the first to m-th data lines DL1 to DLn, DLm, respectively. In other words, the first pixel cell PXL of the first horizontal line HL1 is connected to the first data line DL1, the second pixel cell PXL of the first horizontal line HL1 is connected to the second data line DL1, The third pixel cell PXL of the first horizontal line HL1 is connected to the third data line DL3 and the mth pixel cell PXL of the first horizontal line HL1 is connected to the line DL2, And the pixel cell PXL is connected to the m-th data line DLm.
제 1 및 제 2 구동전원 라인, 그리고 발광제어라인은 모든 화소셀(PXL)에 공 통으로 접속된다.The first and second driving power supply lines, and the emission control line are commonly connected to all the pixel cells PXL.
여기서, 상기 발광제어라인에 대하여 좀 더 구체적으로 설명하면 다음과 같다.Here, the emission control line will be described in more detail as follows.
도 2는 도 1의 제 1 및 제 2 수평라인에 배열된 일부 화소셀들 및 발광제어라인을 나타낸 도면이다.FIG. 2 is a view showing some pixel cells and emission control lines arranged in the first and second horizontal lines of FIG. 1. FIG.
도 2에 도시된 바와 같이, 각 화소셀(PXL)은 외부로부터의 신호라인들로부터 신호를 공급받아 구동전류를 생성하는 화소회로(PD)와, 상기 화소회로(PD)로부터의 구동전류에 따라 발광하는 발광소자(OLED)를 포함한다.As shown in FIG. 2, each pixel cell PXL includes a pixel circuit PD for receiving a signal from external signal lines to generate a driving current, And a light emitting device OLED that emits light.
각 발광제어라인(EML)은 두 개의 대 분기라인(MDL1, MDL2)과, 각 대 분기라인(MDL1, MDL2)으로부터 분기된 다수의 소 분기라인들(ADL1, ADL2)을 포함한다. 하나의 발광제어라인(EML)으로부터 분기된 두 개의 대 분기라인들(MDL1, MDL2) 중 어느 하나의 대 분기라인(MDL1)은 화소회로(PD)의 일측에 위치하고, 나머지 하나의 대 분기라인(MDL2)은 화소회로(PD)의 타측에 위치한다.Each emission control line EML includes two large branch lines MDL1 and MDL2 and a plurality of small branch lines ADL1 and ADL2 branched from the respective branch lines MDL1 and MDL2. One large branch line MDL1 of the two large branch lines MDL1 and MDL2 branched from one light emission control line EML is located at one side of the pixel circuit PD and the other large branch line MDL1 MDL2 are located on the other side of the pixel circuit PD.
상기 화소회로(PD)의 일측에 위치한 제 1 대 분기라인(MDL1)으로부터는 다수의 제 1 소 분기라인(ADL1)들이 화소회로(PD)들의 상측을 향해 분기되고, 각 제 1 소 분기라인(ADL1)은 해당 화소회로(PD)내의 스위칭소자에 접속된다. 그리고, 상기 화소회로(PD)의 타측에 위치한 제 2 대 분기라인(MDL2)으로부터는 다수의 제 2 소 분기라인(ADL2)들이 화소회로(PD)들의 하측을 향해 분기되고, 각 제 2 소 분기라인(ADL2)은 해당 화소회로(PD)내의 스위칭소자에 접속된다.A plurality of first sub branch lines ADL1 are branched toward the upper side of the pixel circuits PD from the first major branch line MDL1 located at one side of the pixel circuit PD, ADL1 are connected to the switching elements in the pixel circuit PD. A plurality of second sub branch lines ADL2 are branched from the second major branch line MDL2 located on the other side of the pixel circuit PD toward the lower side of the pixel circuits PD, The line ADL2 is connected to the switching element in the pixel circuit PD.
즉, 종래에는 하나의 발광제어라인(EML)이 한 수평라인들내의 화소회로(PD) 의 일측에 위치하고, 이 발광제어라인(EML)으로부터 다수의 분기라인들이 화소회로(PD)의 상측을 향해 분기되는 방식이어서, 분기라인들이 많을 경우 상기 분기라인들을 화소회로(PD)측으로 분기하기가 불가능하였다. 그러나, 본 발명에서는 하나의 발광제어라인(EML)으로부터 두 개의 대 분기라인(MDL1, MDL2)을 분기시키고, 하나의 대 분기라인(MDL1)을 화소회로(PD)들의 일측에 위치시키고, 나머지 하나의 대 분기라인(MDL2)을 상기 화소회로(PD)들의 타측에 위치시킴으로써, 소 분기라인들(A0DL1, ADL2)이 화소회로(PD)의 일측과 타측에 나누어 위치하도록 할 수 있다. 이에 따라, 인접한 소 분기라인들(ADL1, ADL2)간의 거리를 종래에 비하여 상대적으로 크게 유지할 수 있어 인접한 소 분기라인들(ADL1, ADL2)간의 단락을 방지할 수 있다.That is, conventionally, one emission control line (EML) is located at one side of the pixel circuit (PD) in one horizontal line, and a plurality of branch lines from the emission control line (EML) If the number of branch lines is large, it is impossible to branch the branch lines to the pixel circuit (PD) side. However, in the present invention, the two large branch lines MDL1 and MDL2 are branched from one emission control line EML, one large branch line MDL1 is placed on one side of the pixel circuits PD, The sub branch lines A0DL1 and ADL2 can be positioned on one side and the other side of the pixel circuit PD by placing the sub branch lines MDL2 on the other side of the pixel circuits PD. Accordingly, the distance between the adjacent sub branch lines ADL1 and ADL2 can be relatively large compared to the conventional one, and short-circuiting between the adjacent sub branch lines ADL1 and ADL2 can be prevented.
도 3은 도 2의 화소회로(PD)의 회로구조를 나타낸 도면이다.3 is a diagram showing a circuit structure of the pixel circuit PD of FIG.
상기 화소회로(PD)는 제 1 내지 제 4 스위칭소자(Tr1 내지 Tr4), 구동 스위칭소자(Tr_D), 및 스토리지 커패시터(Cst)를 포함한다.The pixel circuit PD includes first to fourth switching elements Tr1 to Tr4, a driving switching element Tr_D, and a storage capacitor Cst.
제 1 스위칭소자(Tr1)는 스캔 라인으로부터의 스캔 신호에 따라 데이터 라인과 제 1 노드(n1)간을 접속시킨다.The first switching element Tr1 connects the data line and the first node n1 according to a scan signal from the scan line.
제 2 스위칭소자(Tr2)는 상기 발광제어신호라인으로부터 분기된 제 1 대 분기라인 및 제 1 소 분기라인으로부터의 발광제어신호에 따라 기준전압전송라인(VRL)과 제 1 노드(n1)간을 접속시킨다.The second switching element Tr2 is connected between the reference voltage transmission line VRL and the first node n1 in accordance with the light emission control signals from the first main branch line and the first sub branch line branched from the light emission control signal line Respectively.
제 3 스위칭소자(Tr3)는 스캔 라인으로부터의 스캔 신호에 따라 제 2 노드(n2)와 제 3 노드(n3)간을 접속시킨다.The third switching device Tr3 connects the second node n2 and the third node n3 according to a scan signal from the scan line.
스토리지 커패시터(Cst)는 제 1 노드(n1)와 제 2 노드(n2)간에 접속된다.The storage capacitor Cst is connected between the first node n1 and the second node n2.
구동 스위칭소자(Tr_D)는 제 2 노드(n2)의 전압에 따라 제 1 구동전원 라인으로부터 제 3 노드(n3)를 향해 흐르는 발광전류의 크기를 제어한다.The driving switching element Tr_D controls the magnitude of the light emission current flowing from the first driving power supply line toward the third node n3 according to the voltage of the second node n2.
제 4 스위칭소자(Tr4)는 발광제어라인(EML)으로부터 분기된 제 2 대 분기라인 및 제 2 소 분기라인으로부터의 발광제어신호에 따라 상기 제 3 노드(n3)와 상기 발광소자(OLED)간을 접속시킨다.The fourth switching element Tr4 is connected between the third node n3 and the light emitting element OLED in accordance with a light emission control signal from the second major branch line and the second minor branch which are branched from the light emission control line EML. .
미설명한 VSL은 제 2 구동전원 라인을 의미한다.The VSL not described means the second driving power supply line.
상기 스캔 라인에 공급되는 스캔 신호와 상기 발광제어라인(EML)에 공급되는 발광제어신호는 서로 반대의 위상을 갖는다. 즉, 상기 스캔 신호가 고전압을 갖는 기간에 상기 발광제어신호는 저전압을 가지며, 상기 스캔 신호가 저전압을 갖는 기간에 상기 발광제어신호는 고전압을 가진다.The scan signal supplied to the scan line and the emission control signal supplied to the emission control line (EML) have phases opposite to each other. That is, the emission control signal has a low voltage in a period in which the scan signal has a high voltage, and the emission control signal has a high voltage in a period in which the scan signal has a low voltage.
제 1 기간동안 스캔 신호가 저전압으로 유지 될 때, 이를 공급받는 제 1 및 제 3 스위칭소자(Tr1, Tr3)가 턴-온된다. 한편, 이 제 1 기간에 발광제어신호는 고전압을 가지므로, 이를 공급받는 제 2 및 제 4 스위칭소자(Tr2, Tr4)는 턴-오프된다.When the scan signal is maintained at the low voltage for the first period, the first and third switching elements Tr1 and Tr3 supplied thereto are turned on. On the other hand, in this first period, since the emission control signal has a high voltage, the second and fourth switching elements Tr2 and Tr4 supplied thereto are turned off.
상기 턴-온된 제 1 스위칭소자(Tr1)를 통해 데이터 라인으로부터의 데이터 전압이 제 1 노드(n1)에 충전된다. 또한, 제 3 스위칭소자(Tr3)가 턴-온됨에 따라 구동 스위칭소자(Tr_D)는 다이오드 접속상태가 되어, 제 2 노드(n2)에는 제 1 구동전압(VDD)과 상기 구동 스위칭소자(Tr_D)의 문턱전압간의 차전압이 저장된다.The first node n1 is charged with the data voltage from the data line through the turned-on first switching element Tr1. The third switching element Tr3 is turned on so that the driving switching element Tr_D is in the diode connected state and the second node n2 is supplied with the first driving voltage VDD and the driving switching element Tr_D, The difference voltage is stored.
이후 제 2 기간에 스캔 신호가 저전압에서 고전압으로 변경되고, 발광제어신 호가 고전압에서 저전압으로 변경된다. 이에 따라, 제 1 및 제 3 스위칭소자(Tr1, Tr3)가 턴-오프되고, 제 2 및 제 4 스위칭소자(Tr2, Tr4)가 턴-온된다. 상기 제 2 스위칭소자(Tr2)가 턴-온됨에 따라, 제 1 노드(n1)에는 기준전압전송라인(VRL)으로부터의 기준전압(Vref)이 공급된다. 그러면, 제 2 노드(n2)의 전압이 데이터 전압과 기준전압(Vref)간의 차전압만큼 하강된다. 여기서, 상기 데이터 전압은 상기 기준전압(Vref)보다 크다. 이 제 2 기간에 상기 제 2 노드(n2)의 전압에 따라 구동 스위칭소자(Tr_D)가 턴-온되고, 이 턴-온된 구동 스위칭소자(Tr_D)를 통해 구동 전류가 흐른다. 이 구동 전류는 턴-온된 제 4 스위칭소자(Tr4)를 통해 발광소자(OLED)에 공급되어 상기 발광소자(OLED)를 발광시킨다.Then, in the second period, the scan signal is changed from the low voltage to the high voltage, and the light emission control signal is changed from the high voltage to the low voltage. Thus, the first and third switching elements Tr1 and Tr3 are turned off, and the second and fourth switching elements Tr2 and Tr4 are turned on. As the second switching element Tr2 is turned on, the first node n1 is supplied with the reference voltage Vref from the reference voltage transmission line VRL. Then, the voltage of the second node n2 is lowered by the difference voltage between the data voltage and the reference voltage Vref. Here, the data voltage is greater than the reference voltage Vref. In this second period, the driving switching element Tr_D is turned on in accordance with the voltage of the second node n2, and a driving current flows through the turned-on driving switching element Tr_D. The driving current is supplied to the light emitting element OLED through the turned-on fourth switching element Tr4 to emit the light emitting element OLED.
본 발명의 실시예에서는 발광제어라인(EML)을 변경하는 구조에 대해서만 설명을 하였지만, 이 발광제어라인(EML) 외에도 상기 화소를 가로지르는 다른 신호라인들이 있다면 이러한 신호라인들에 대해서도 상술된 바와 같은 변경을 적용할 수 있다. In the embodiment of the present invention, only the structure for changing the emission control line (EML) has been described. However, if there are other signal lines crossing the pixel in addition to the emission control line (EML) Changes can be applied.
이상에서 설명한 본 발명은 상술한 실시예 및 첨부된 도면에 한정되는 것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능하다는 것이 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 있어 명백할 것이다.It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. Will be clear to those who have knowledge of.
도 1은 본 발명에 따른 발광 표시장치를 나타내는 도면1 is a view showing a light emitting display device according to the present invention;
도 2는 도 1의 제 1 및 제 2 수평라인에 배열된 일부 화소셀들 및 발광제어라인을 나타낸 도면FIG. 2 is a view showing some pixel cells and emission control lines arranged in the first and second horizontal lines of FIG. 1; FIG.
도 3은 도 2의 화소회로의 회로구조를 나타낸 도면3 is a diagram showing a circuit structure of the pixel circuit of Fig. 2
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| KR20070118857A (en) * | 2006-06-13 | 2007-12-18 | 한양대학교 산학협력단 | Organic electro-luminescent display panel and driving method for the same |
| KR20080061781A (en) * | 2006-12-28 | 2008-07-03 | 엘지디스플레이 주식회사 | An electro-luminescence display device |
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| Publication number | Publication date |
|---|---|
| KR20100033226A (en) | 2010-03-29 |
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