CN101221727A - Pixel, organic light emitting display device and driving method thereof - Google Patents

Pixel, organic light emitting display device and driving method thereof Download PDF

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Publication number
CN101221727A
CN101221727A CNA2007103007661A CN200710300766A CN101221727A CN 101221727 A CN101221727 A CN 101221727A CN A2007103007661 A CNA2007103007661 A CN A2007103007661A CN 200710300766 A CN200710300766 A CN 200710300766A CN 101221727 A CN101221727 A CN 101221727A
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transistor
voltage
organic light
signal
pixel
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CN101221727B (en
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崔相武
李王棗
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Samsung Display Co Ltd
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Samsung SDI Co Ltd
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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
    • G09G3/3233—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

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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

A pixel includes an organic light emitting diode, a first transistor coupled to a scan line and a data line, the first transistor being configured to receive a data signal via the data line when a scan signal is supplied to the scan line, a storage capacitor configured to store voltage corresponding to the data signal received by the first transistor, a second transistor configured to control an electric current from the first power source to the second power source via the organic light emitting diode with respect to the voltage stored in the storage capacitor, and compensation unit configured to adjust voltage at a gate electrode of the second transistor, the voltage adjustment being sufficient to compensate for a deterioration degree of the organic light emitting diode.

Description

Pixel, organic light-emitting display device and driving method thereof
Technical field
Embodiments of the invention relate to pixel, have the organic light-emitting display device and the driving method thereof of this pixel.More particularly, embodiments of the invention relate to pixel, the organic light-emitting display device with this pixel and the driving method thereof of the brightness that can compensate its light emitting diode minimizing.
Background technology
Usually, flat-panel monitor is compared the weight and volume that may have minimizing with the cathode ray tube (CRT) display, and flat-panel monitor for example is LCD (LCD), field-emitter display (FED), plasma display panel (PDP), electroluminescence (EL) display or the like.For example, the EL display, for example, organic light-emitting display device can comprise a plurality of pixels, and each pixel can have light emitting diode (LED).Each LED can comprise the red-emitting (R) that the combination by electronics in it and hole triggers, green glow (G), or the luminescent layer of blue light (B), so pixel can be sent corresponding light to form image.This EL display can have fast response time and low-power consumption.
The conventional pixel of EL display can be by being configured to receive data and sweep signal and driving according to the photoemissive driving circuit that this data-signal is controlled its LED.More particularly, the anode of LED can be coupled to the driving circuit and first power supply, and the negative electrode of LED can be coupled to second source.Therefore, LED can produce the light with predetermined luminance according to the electric current that flows through it, can control this electric current by driving circuit according to data-signal simultaneously.
But, the material of the luminescent layer of traditional LED, organic material for example since for example with steam, oxygen or the like contact, may be along with the time deterioration, thereby reduce the current/voltage characteristic of LED and therefore make the deterioration in brightness of LED.In addition, each traditional LED may be with different speed deteriorations, and this different speed depends on the component of its luminescent layer, promptly is used for launching the type of material of different colours light, thereby causes brightness heterogeneous.The inadequate brightness of LED, promptly deterioration and/or brightness heterogeneous may reduce the display characteristic of EL display device, and may reduce its life-span and efficient.
Summary of the invention
Therefore, embodiments of the invention relate to pixel, have the organic light-emitting display device and the driving method thereof of this pixel, and it overcomes the one or more problems that caused by the restriction of conventional art and shortcoming basically.
Therefore, the feature of embodiments of the invention provides the pixel of the compensating unit with the inadequate brightness that can compensate its light emitting diode (LED).
Another feature of embodiments of the invention provides the organic light-emitting display device with pixel, and these pixels have the compensating unit of the inadequate brightness of the LED that can compensate them.
Another feature of embodiments of the invention provides the driving method of the pixel of the compensating unit with the inadequate brightness that can compensate its LED.
At least one above-mentioned and further feature of the present invention can be by providing the pixel that is included in the Organic Light Emitting Diode between first and second power supplys, be coupled to sweep trace and data line and be configured to when sweep signal is provided to this sweep trace, pass through the first transistor that this data line receives data-signal, be configured to store holding capacitor with the data-signal correspondent voltage that receives by this first transistor, be coupled to the first transistor and be configured to and pass through the transistor seconds of this light emitting diode from first power supply to the electric current of second source according to the Control of Voltage that is stored in this holding capacitor, and the compensating unit of voltage that is configured to adjust the grid of this transistor seconds realizes that this voltage is adjusted the degradation of this Organic Light Emitting Diode of adequate remedy.
Compensating unit can comprise the 3rd transistor of the anode that is coupled to Organic Light Emitting Diode, at the 3rd transistor with have the 4th transistor between the voltage source of voltage of the anode voltage that is higher than Organic Light Emitting Diode, and be coupling in the grid of transistor seconds and the feedback condenser between the 3rd and the 4th transistorized public electrode.When the 3rd transistor turns, the voltage of the third and fourth transistorized public electrode can equal the anode voltage of Organic Light Emitting Diode substantially, and when the 4th transistor is opened, can equal the voltage of voltage source in fact.Feedback condenser can be configured to voltage with the grid of transistor seconds and be adjusted to voltage corresponding to the third and fourth transistorized public electrode.The 4th transistor can be configured to when being cut off when first control line provides first control signal, and when ending, the supply of first control signal is switched on, and the 3rd transistor can be configured to when being switched on when second control line provides second control signal, and is cut off when the supply of second control signal is ended.First and second control signals can have opposite polarity (polarities), and each of first and second control signals all can be overlapping with the sweep signal that is applied to sweep trace.
The 4th transistor can be configured to when being cut off when first control line applies first control signal, and the 3rd transistor can be configured to when being switched on when first control line applies first control signal, and third and fourth transistor has different conduction (conductivities).The 3rd transistor can be a nmos type transistor.The 4th transistor can be configured to when being cut off when first control line applies first control signal and conducting when first control signal is ended, the 3rd transistor can be configured to be switched on when applying sweep signal to sweep trace, and first control signal can be overlapping with sweep signal.The 4th transistor can be configured to be cut off when applying sweep signal to sweep trace, and the 3rd transistor can be configured to be switched on when applying sweep signal to sweep trace, and third and fourth transistor can have different conduction.
Voltage source can be configured to have the magnitude of voltage lower than first power supply.Voltage source can be first power supply, the reverse voltage that applies by sweep trace, the perhaps reverse voltage that applies of the sweep trace by neighbor.The electric capacity of feedback condenser can be configured to corresponding with the material of Organic Light Emitting Diode according to the color of the light of Organic Light Emitting Diode emission.Pixel may also comprise the 5th transistor between transistor seconds and the Organic Light Emitting Diode, and the 5th transistor is configured to be cut off when applying sweep signal at least.The 5th transistor can be configured to be cut off when applying led control signal to the light emitting control line, and is configured to be switched on when applying of led control signal ended.Led control signal can be overlapping with sweep signal.
At least one above-mentioned and further feature of the present invention can comprise a plurality of pixels by providing, the organic light-emitting display device of scanner driver and data driver is realized, these a plurality of pixels are coupled to sweep trace and data line, this scanner driver is configured to provide sweep signal by sweep trace, this data driver is configured to driving data lines, wherein each pixel in these a plurality of pixels all comprises the Organic Light Emitting Diode between first and second power supplys, be coupled between an one scan line and the data line and be configured to when sweep signal is provided to this sweep trace to receive the first transistor of data-signal by this data line, be configured to store holding capacitor with the corresponding voltage of data-signal that receives by this first transistor, be coupled to the first transistor and be configured to and pass through the transistor seconds of this light emitting diode from first power supply to the electric current of second source according to the Control of Voltage that is stored in this holding capacitor, and the compensating unit of voltage that is configured to adjust the grid of this transistor seconds, voltage is adjusted the degradation of this Organic Light Emitting Diode of adequate remedy.
At least one above-mentioned and further feature of the present invention can be realized by the method that drives organic light-emitting display device is provided, this method comprises when applying sweep signal to sweep trace and receives data-signal by data line in the first transistor, will be in holding capacitor corresponding to the store voltages of this data-signal, this holding capacitor is coupled to the grid of transistor seconds, adjust the anode voltage of first terminal voltage of feedback condenser to Organic Light Emitting Diode, this feedback condenser has second end of the grid that is coupled to transistor seconds, and end this sweep signal, so the voltage of first end of this feedback condenser is added to the voltage level of voltage source.
Transistor seconds according to the Control of Voltage of the grid of transistor seconds from first power supply by the current capacity of Organic Light Emitting Diode to second source.The voltage level of voltage source can be the voltage higher than the anode voltage of Organic Light Emitting Diode, and comparable first power source voltage is low.The voltage that increases by first end of feedback condenser can be included in the electrical connection that applies during the sweep signal by transistor seconds and Organic Light Emitting Diode.The anode voltage of Organic Light Emitting Diode can be the threshold voltage of Organic Light Emitting Diode.
Description of drawings
By being described in detail with reference to the attached drawings one exemplary embodiment of the present invention, above-mentioned and further feature of the present invention and advantage will become clearer to those skilled in the art, wherein:
Shown in Fig. 1 is synoptic diagram according to the organic light-emitting display device of the embodiment of the invention;
Shown in Fig. 2 is circuit diagram according to the pixel in the organic light-emitting display device of Fig. 1 of the embodiment of the invention;
Shown in Fig. 3 is detailed circuit diagram according to the compensating unit in the pixel of Fig. 2 of the embodiment of the invention;
Shown in Fig. 4 is the oscillogram of the signal in the circuit of Fig. 2;
Shown in Fig. 5 is the detailed circuit diagram of the compensating unit in the pixel of Fig. 2 in accordance with another embodiment of the present invention;
Shown in Fig. 6 is the detailed circuit diagram of the compensating unit in the pixel of Fig. 2 in accordance with another embodiment of the present invention;
Shown in Fig. 7 is the detailed circuit diagram of the compensating unit in the pixel of Fig. 2 in accordance with another embodiment of the present invention;
Shown in Fig. 8 is the detailed circuit diagram of the compensating unit in the pixel of Fig. 2 in accordance with another embodiment of the present invention;
Shown in Fig. 9 is the detailed circuit diagram of the compensating unit in the pixel of Fig. 2 in accordance with another embodiment of the present invention;
Shown in Figure 10 is the detailed circuit diagram of the compensating unit in the pixel of Fig. 2 in accordance with another embodiment of the present invention;
Shown in Figure 11 is the synoptic diagram of organic light-emitting display device in accordance with another embodiment of the present invention;
Shown in Figure 12 is circuit diagram according to the pixel in the organic light-emitting display device of Figure 11 of the embodiment of the invention;
Shown in Figure 13 is detailed circuit diagram according to the compensating unit in the pixel of Figure 12 of the embodiment of the invention;
Shown in Figure 14 is the oscillogram of the signal in the circuit diagram of Figure 12;
Shown in Figure 15 is the detailed circuit diagram of the compensating unit in the pixel of Figure 12 in accordance with another embodiment of the present invention;
Shown in Figure 16 is the detailed circuit diagram of the compensating unit in the pixel of Figure 12 in accordance with another embodiment of the present invention; And
Shown in Figure 17 is the detailed circuit diagram of the compensating unit in the pixel of Figure 12 in accordance with another embodiment of the present invention.
Embodiment
Hereinafter, will embodiments of the invention more fully be described with reference to the accompanying drawing that wherein shows one exemplary embodiment of the present invention.But, the formal representation that each side of the present invention can be different and should not be interpreted into the embodiment that is restricted to here to be proposed.On the contrary, provide these embodiment so that the disclosure will become detailed and comprehensive for a person skilled in the art, and cover scope of the present invention comprehensively.
In the drawings, clear for what illustrate, may enlarge element and regional size.Be appreciated that equally when element be called as another element " on " time, its can be located immediately at another the layer or substrate on, perhaps also can have the middle layer between them.In addition, should be appreciated that equally when element be called as two elements " between " time, can be to have only this element between these two elements, perhaps can have one or more intermediary element between these two elements.In addition, when element was called as " being coupled to " another element, it can be to be directly connected to another element, perhaps is connected to another element indirectly by one or more intermediary element of inserting between them.In the text, similarly reference marker refers to similar elements.
With reference to figure 1, organic light-emitting display device according to the embodiment of the invention can comprise the pixel cell 130 with a plurality of pixels 140, the scanner driver 110 of driven sweep line (S1-Sn), first control line (CL11-CL1n) and second control line (CL21-CL2n), the data driver 120 of driving data lines (D1-Dm), and the timing controller 150 that is used for gated sweep driver 110 and data driver 120.The pixel 140 of pixel cell 130 can any suitable pattern arrangement, so each pixel 140 can be coupled to sweep trace (S1-Sn), first control line (CL11-CL1n), second control line (CL21-CL2n) and/or data line (D1-Dm), as shown in Figure 1.
The scanner driver 110 of organic light-emitting display device can receive turntable driving control signal (SCS) from timing controller 150, and can produce the respective scanned signal that will be applied to sweep trace (S1-Sn).Equally, scanner driver 110 can produce first and second control signals in response to the SCS of this reception, and first and second control signals that produced can be provided to first and second control lines (CL11-CL1n) and (CL21-CL2n) respectively.First and second control signals can have roughly the same length, and can be opposite each other.Sweep signal can be than each of its corresponding first and second control signals each of short and its corresponding first and second control signals overlapping fully, as below with reference to figure 4 in more detail as described in.In this respect, should notice that signal length hereinafter can refer to along the width of the signal pulse of transverse axis, as shown in Fig. 4 and 14.Should also be noted that followingly, be meant overlapping with time correlation with " overlapping " of signal correction.
The data driver 120 of organic light-emitting display device can receive data drive control signal (DCS) from timing controller 150, and can produce the corresponding data signal that will be applied to data line (D1-Dm).
The timing controller 150 of organic light-emitting display device can produce synchronous (DCS) that will be applied to data driver 120 and scanner driver 110 respectively and (SCS) signal.In addition, timing controller 150 can be from external source with data information transfer to data driver 120.
Pixel cell 130 can be coupled to first power supply (ELVDD) and second source (ELVSS), so first and second power supplys (ELVDD) and each voltage (ELVSS) can be applied to each pixel 140.In addition, each pixel 140 of reception voltage can be according to the data-signal generation light that is applied on it from first and second power supplys (ELVDD) with (ELVSS).Compensating unit 142 can be installed in each pixel 140 degradation with the compensation Organic Light Emitting Diode, as below will be with respect to Fig. 2-3 in greater detail.In this respect, should notice that " degradation " refers to the anode voltage amount of the Organic Light Emitting Diode by the low level total current of essence (substantially) and compare, the measurement of the anode voltage decrease of the Organic Light Emitting Diode of the total current by the essence high level.
With reference to figure 2, each pixel 140 can include OLED (OLED) and can control the driving circuit of the electric current that is applied to OLED, so the light of OLED emission can be corresponding to the data-signal that is applied to pixel 140.Driving circuit can comprise the first transistor (M1), transistor seconds (M2), holding capacitor (Cst) and compensating unit 142.The anode electrode of OLED can be coupled to transistor seconds (M2), and the cathode electrode of OLED can be coupled to second source (ELVSS), so OLED can produce predetermined luminance according to the electric current that transistor seconds (M2) provides.Transistor seconds (M2) can be called as driving transistors.
The first transistor (M1) can make its gate coupled to sweep trace (Sn), and can its first and second electrode be coupled to the grid of data line (Dm) and transistor seconds (M2) respectively.The first transistor when sweep signal is applied to its grid (M1) can be switched on, so data-signal can be applied to second electrode of the first transistor (M1) by data line (Dm), be transferred to the grid of transistor seconds (M2) with first electrode by the first transistor (M1).In this respect, should notice that transistorized first electrode refers in its source electrode and/or the drain electrode, so transistorized second electrode refers to its corresponding drain electrode and/or source electrode.In other words, if first electrode is a source electrode, then second electrode is drain electrode, and vice versa.
Its gate coupled that can make of transistor seconds (M2) arrives second electrode of the first transistor (M1), and can make its first and second electrode be coupled to the anode electrode of first power supply (ELVDD) and OLED respectively.Transistor seconds (M2) can receive data-signal from the first transistor (M1), and may command flows to the electric current of second source (ELVSS) with corresponding with the data-signal that receives from the first transistor (M1) by OLED from first power supply (ELVDD).In other words, OLED can produce light according to the voltage of the grid of transistor seconds (M2).The voltage of first power supply (ELVDD) can be arranged to be higher than the voltage of second source (ELVSS).
Holding capacitor (Cst) can be coupling between the grid and first power supply (ELVDD) of transistor seconds (M2), so holding capacitor (Cst) can be stored and the data-signal correspondent voltage that is transferred to transistor seconds (M2) from the first transistor (M1).
Compensating unit 142 can be coupled to the grid of transistor seconds (M2) to adjust its voltage according to the deterioration of OLED.More particularly, compensating unit 142 can be coupled to voltage source (Vsus), first control line (CL1n) and second control line (CL2n), so voltage source (Vsus) can be used to according to from first and second control lines (CL1n) and the signal that (CL2n) receives adjust the grid voltage of transistor seconds (M2), as will be among Fig. 3 in more detail the description.Therefore, the voltage of voltage source (Vsus) can be higher than voltage (Voled), promptly at the anode electrode place of OLED and corresponding to the voltage of the electric current that flows through OLED, but can be lower than first power supply (ELVDD) so that produce enough brightness in pixel 140.
With reference to figure 3, compensating unit 142 can comprise the 3rd transistor (M3) and the 4th transistor (M4) between the anode electrode that is arranged in voltage source (Vsus) and OLED, and the feedback condenser (Cfb) between the grid of first node (N1) and transistor seconds (M2).First node (N1) can be third and fourth transistor (M3) and common node (M4), and feedback condenser (Cfb) can be used to change the voltage between first node (N1) and the transistor seconds (M2) thus.
As shown in Figure 3-4, the 3rd transistor (M3) can be between the anode electrode of first node (N1) and OLED, and second control signal that can be provided by second control line (CL2n), low voltage signal for example, control.The 4th transistor (M4) can be between first node (N1) and voltage source (Vsus), and first control signal that can be applied by first control line (CL1n), high voltage signal for example, control.Be provided to sweep trace (Sn) before in sweep signal, can respectively first and second control signals be provided to the 4th and the 3rd transistor (M4) and grid (M3), can end the 4th transistor (M4) thus also can conducting the 3rd transistor (M3).When the 4th transistor (M4) by and during the 3rd transistor (M3) conducting, can apply voltage (Voled) to first node (N1).
When voltage (Voled) was applied to first node (N1), sweep signal can be applied to the first transistor (M1) with conducting the first transistor (M1) by sweep trace (Sn).When the first transistor (M1) when being switched on, can in holding capacitor (Cst), store and the data-signal correspondent voltage that applies by data line (Dm) then sweep signal termination.In other words, when voltage is stored in the holding capacitor (Cst), can end the first transistor (M1).
After the first transistor (M1) is cut off, can end first and second control signals, further as shown in Figure 4, thus can conducting the 4th transistor (M4) and can end the 3rd transistor (M3).If the 4th transistor (M4) is switched on, the voltage of first node (N1) can be increased to the voltage of voltage source (Vsus) from (Voled).When the voltage of first node (N1) increased, the grid voltage of transistor seconds (M2) can increase.Especially, can determine the magnitude of voltage that the grid of transistor seconds (M2) increases according to the relation of following equation 1 explanation,
Δ V M2_gate=Δ V N1* (Cfb/ (Cst+Cfb)) equation 1
Δ V wherein M2_gateThe variation of the grid voltage of expression transistor seconds (M2), and Δ V N1The variation of expression first node (N1) voltage.
As finding out from equation 1, the grid voltage of transistor seconds (M2) can change according to the variation of first node (N1) voltage.Therefore, when the voltage of first node (N1) is increased to and voltage source (Vsus) when voltage is corresponding, the grid voltage of transistor seconds (M2) increases too according to aforesaid equation 1.The voltage that the grid of transistor seconds (M2) increases can increase from first power supply (ELVDD) by OLED to the electric current of second source (ELVSS) so that keep the predetermined luminance of OLED.In other words, OLED can be configured to produce the light have with the corresponding predetermined luminance of grid voltage of transistor seconds (M2).Therefore, the current capacity of transistor seconds (M2) can with data-signal, be that stored voltage is corresponding in the holding capacitor (Cst), and when the OLED deterioration, can be adjusted to higher value, so can make brightness constancy that OLED produces regardless of its degradation.
For example, when the OLED deterioration, can increase voltage (Voled), thereby reduce the voltage of first node (N1), and therefore reduce the grid voltage of transistor seconds (M2) by it.But, the reduction value that voltage source (Vsus) can pass through the grid voltage bucking voltage (Voled) of increase transistor seconds (M2) is set according to the degradation of OLED.The voltage that the grid of transistor seconds (M2) increases can increase the current capacity of transistor seconds (M2), thereby compensates the brightness of the reduction that is caused by the OLED deterioration.Therefore, voltage source (Vsus) can be set to and reflect that the magnitude of voltage of the degradation of OLED is worth accordingly, so voltage source (Vsus) provide enough compensation can for the OLED of deterioration.
In addition, each pixel 140 can be configured to have feedback condenser (Cfb), and this feedback condenser (Cfb) has the corresponding capacity of color with its OLED emission separately.In other words, the OLED of each pixel 140 can comprise the different luminescent material that has with the corresponding different comparative lifetime length of concrete component of its luminescent layer, promptly launches the material of green (G) light, red (R) light or indigo plant (B) light.Because the pixel of emission G, R and B light can have the different life-spans, shown in following equation 2, adjust the capacity of feedback condenser (Cfb) so that can provide basic life characteristic uniformly to all pixels 140 for all pixels 140 provide basic deterioration rate uniformly according to concrete material.
(B pixel) Life-span＜(R pixel) Life-span＜(G pixel) Life-spanEquation 2
For example, have the short life-span owing to compare the B pixel with R and/or G pixel, so compare with the feedback condenser (Cfb) of R and/or G pixel, the capacity of the feedback condenser (Cfb) in each B pixel is configured to have higher capability value.Can determine the capacity of the feedback condenser (Cfb) in each pixel 140 according to being used in material in the corresponding OLED luminescent layer, so the non-homogeneous deterioration of a plurality of OLED of pixel 140 that can compensate for emission different colours light.
According to another embodiment shown in Figure 5, compensating unit 142b can be to above-mentioned similar substantially according to the described compensating unit 142 of Fig. 3, except being coupled to single control line.More particularly, compensating unit 142b can be included in above-mentioned according to the feedback condenser (Cfb) in the described essentially identical structure of Fig. 3 and third and fourth transistor (M3) and (M4), be coupled to third and fourth transistor (M3) and the first control line CL1n (M4) except having.Therefore, first control line CL1n may command third and fourth transistor (M3) and (M4) both.
More particularly, compare with (M4) with the 4th transistor (M1), (M2) with first, second, the 3rd transistor (M3) can have opposite conduction.For example, as shown in Figure 5, third and fourth transistor (M3) and (M4) can be respectively nmos type and pmos type transistor.Therefore, first control signal that is applied to first control line (CL1n) can make (M3) conducting of the 3rd transistor and the 4th transistor (M4) is ended.Similarly, when to first control line (CL1n) provide first control signal to be ended the time, the mode of operation of the 3rd transistor (M3) and the 4th transistor (M4) can be reversed, promptly the 3rd transistor (M3) can be cut off and the 4th transistor (M4) is switched on.Compensating unit 142b shown in Fig. 5 can advantageously provide the circuit that is driven by single control line, second control line (CL2n) shown in promptly removable Fig. 3.
The operation of compensating unit 142b can be similar to the operation of front according to the compensating unit 142 of Fig. 4 description substantially, and also can be with reference to figure 4 explanations.More particularly, be applied to sweep trace (Sn) before in sweep signal, first control signal can be applied to first control line (CL1n), thereby by the 4th transistor (M4) and conducting the 3rd transistor (M3).When the 3rd transistor (M3) when being switched on, the voltage of OLED (Voled) can be applied to first node (N1).
Then, sweep signal can be applied to sweep trace (Sn), thus conducting the first transistor (M1).When the first transistor (M1) when being switched on, can be stored in the holding capacitor (Cst) with the data-signal correspondent voltage that is applied to data line (Dm), then sweep signal is ended, thereby by the first transistor (M1).When the first transistor (M1) when being cut off, can end first control signal of first control line (CL1n), thereby by the 3rd transistor (M3) and conducting the 4th transistor (M4).When the 4th transistor (M4) when being switched on, the voltage of first node (N1) rises to the voltage of voltage source (Vsus), and the voltage of the grid of transistor seconds (M2) also can increase thus.Can adjust first node (N1) and transistor seconds (M2) voltage increase with the compensation OLED deterioration, thereby the minimizing of its brightness is minimized.
According to another embodiment of Fig. 6, compensating unit 142c can be to above-mentioned similar substantially according to the described compensating unit 142 of Fig. 3, except being coupled to single control line and sweep trace (Sn).More particularly, compensating unit 142c can be included in above-mentioned according to the feedback condenser (Cfb) in the described essentially identical structure of Fig. 3 and third and fourth transistor (M3) and (M4), except having the 3rd transistor (M3) that is coupled to sweep trace (Sn), rather than be coupled to outside second control line (CL2n).Therefore, sweep signal may command the 3rd transistor (M3) that applies from sweep trace (Sn), and the first control signal may command the 4th transistor (M4) that applies from first control line (CL1n).Compensating unit 142c shown in Fig. 6 can advantageously provide the circuit that is driven by single control line, second control line (CL2n) shown in promptly removable Fig. 3.
The operation of compensating unit 142c can be similar to the operation of the above-mentioned compensating unit of describing according to Fig. 3 142 substantially, and also can be with reference to figure 4 explanations.More particularly, first control signal, promptly high signal can be applied to first control line (CL1n) to end the 4th transistor (M4).Be applied to sweep trace (Sn) in sweep signal and can provide first control signal before.
When first control signal is applied to first control line (CL1n), can begin sweep signal to sweep trace (Sn), so can conducting first and the 3rd transistor (M1) and (M3).When the first transistor (M1) when being switched on, data-signal (Dm) can pass through the first transistor (M1) transmission, and can be stored in the holding capacitor (Cst).Simultaneously, because the 3rd transistor (M3) is switched on, so the voltage of OLED (Voled) can be applied in first node (N1).When the voltage corresponding to data-signal is stored in the holding capacitor (Cst), and voltage (Voled) is when being applied to first node (N1), and then sweep trace can be ended, thus the first and the 3rd transistor (M1) and (M3) can be cut off.
After at the first and the 3rd transistor (M1) and (M3) being cut off, first control signal can be ended with by the 4th transistor (M4) to the supply of first control line (CL1n).When the 4th transistor (M4) when being cut off, the voltage of first node (N1) rises to the voltage of voltage source (Vsus), thereby increases according to the trigger voltage of equation 1 at the grid place of transistor seconds (M2).Therefore, can compensate the deterioration of OLED by the grid voltage increment of adjusting transistor seconds (M2).
According to another embodiment of Fig. 7, compensating unit 142d can be similar substantially to the above-mentioned compensating unit of describing according to Fig. 3 142, except being coupled to sweep trace (Sn), rather than be coupled to first and second control lines (CL1n) and (CL2n) outside.More particularly, compensating unit 142d can be included in above-mentioned according to the feedback condenser (Cfb) in the described essentially identical structure of Fig. 3 and third and fourth transistor (M3) and (M4), both can be coupled to sweep trace (Sn) and be controlled by this sweep trace (Sn) except third and fourth transistor (M3) with (M4).
More particularly, compare with (M3) with the 3rd transistor (M1), (M2) with first, second, the 4th transistor (M4) can have opposite conduction.For example, as shown in Figure 7, third and fourth transistor (M3) and (M4) can be respectively pmos type and nmos type transistor.Therefore, the 4th transistor (M4) can be cut off when sweep signal is applied to sweep trace (Sn), and can not be switched on when sweep signal is not applied to sweep trace (Sn).The 3rd transistor (M3) can be opposite with the 4th transistorized operation about the operation of sweep signal.Compensating unit 142d shown in Fig. 7 can advantageously provide the circuit that is driven by sweep trace (Sn), so removable first control line (CL1n) and second control line (CL2n).
To describe the operation of compensating unit 142d below in detail.At first, sweep signal can be applied to sweep trace (Sn), the first and the 3rd transistor (M1) and (M3) can be switched on thus, and the 4th transistor (M4) can be cut off simultaneously.Therefore, can be stored in the holding capacitor (Cst) with the data-signal correspondent voltage that is applied to data line (Dm), and voltage (Voled) can be applied to first node (N1).Next, sweep signal can be ended.
When the supply of sweep signal is ended, the first and the 3rd transistor (M1) and (M3) can be cut off, and the 4th transistor (M4) can be switched on.Then, the voltage of first node (N1) can be added to the voltage of voltage source (Vsus), thereby increases according to the trigger voltage of equation 1 at the grid place of transistor seconds (M2).The voltage increment at grid place that therefore, can be by adjusting transistor seconds (M2) compensates the deterioration of OLED.
Note, though the embodiment shown in Fig. 3-7 comprises that voltage source (Vsus) is as the voltage source that is coupled to the 4th transistor (M4), but other is used for the voltage source of the 4th transistor (M4), for example following embodiment that describes according to Fig. 8-10, also within the scope of the invention.Therefore, each embodiment shown in Fig. 3-7 can be configured to comprise the coupling of the 4th transistor (M4) and the voltage source except voltage source (Vsus).
For example, according to another embodiment shown in Fig. 8, compensating unit 142e can be coupled to first power supply (ELVDD) except making the 4th transistor (M4), rather than be coupled to outside the voltage source (Vsus) to above-mentioned similar substantially according to the described compensating unit 142 of Fig. 3.Therefore, the voltage of first node (N1) can be increased to the voltage of first power supply (ELVDD) from voltage (Voled), even when the 4th transistor (M4) is not coupled to voltage source (Vsus), also can compensate the deterioration of OLED thus according to the grid voltage that equation 1 increases transistor seconds (M2).
According to another embodiment shown in Fig. 9, compensating unit 142f can be coupled to sweep trace (Sn) except making the 4th transistor (M4), rather than be coupled to outside the voltage source (Vsus) to above-mentioned similar substantially according to the described compensating unit 142 of Fig. 3.More particularly, compensating unit 142f can be included in above-mentioned according to the feedback condenser (Cfb) in the described essentially identical structure of Fig. 3 and third and fourth transistor (M3) and (M4), except utilize when being switched at the 4th transistor (M4) with sweep trace (Sn) in sweep signal, i.e. Fan Zhuan voltage signal, outside the correspondent voltage, as shown in Fig. 4 and 9.Therefore, the voltage of first node (N1) can be increased to the voltage of sweep trace (Sn) from voltage (Voled), so can stably compensate the deterioration of OLED.In this respect, the voltage that should note the sweep trace (Sn) in the organic light-emitting display device can be set to higher than voltage Voled.
According to another embodiment shown in Figure 10, compensating unit 142g can be to above-mentioned similar substantially according to the described compensating unit 142 of Fig. 3, except making the 4th transistor (M4) be coupled to prime sweep trace (Sn-1), be the sweep trace of neighbor, rather than be coupled to outside the voltage source (Vsus).More particularly, compensating unit 142g can be included in above-mentioned according to the feedback condenser (Cfb) in the described essentially identical structure of Fig. 3 and third and fourth transistor (M3) and (M4), except utilize when being switched at the 4th transistor (M4) with prime sweep trace (Sn-1) in sweep signal, i.e. Fan Zhuan voltage signal, correspondent voltage is as shown in Fig. 4 and 10.Therefore, the voltage of first node (N1) can be increased to the voltage of prime sweep trace (Sn-1) from voltage (Voled), can stably compensate the deterioration of OLED thus.
According to another embodiment shown in Figure 11, organic light-emitting display device can be similar to the organic light-emitting display device that the front is described according to Fig. 1 substantially, except being included in a plurality of pixels 240 in the pixel cell 230, and outside the light emitting control line (E1-En) except sweep trace (S1-Sn), first control line (CL11-CL1n), second control line (CL21-CL2n) and data line (D1-Dm), as shown in figure 11.Therefore, the scanner driver 210 of organic light-emitting display device can produce led control signal to be provided to light emitting control line (E1-En).
Led control signal can have and the basic equal lengths of second control signal, and can be opposite with it, as shown in figure 14.Led control signal can be longer than sweep signal, and can be shorter than first control signal, shown in Figure 14 is further.Led control signal, sweep signal, first control signal and second control signal can overlap each other.
With reference to Figure 12, each pixel 240 can include OLED (OLED) and can control the driving circuit of the electric current that is applied to OLED, and the light of OLED emission can be corresponding with the data-signal that is applied to pixel 140 thus.Driving circuit can be similar substantially to the driving circuit of the above-mentioned pixel of describing according to Fig. 2 140, except being included in the 5th transistor (M5) between OLED and the transistor seconds (M2), led control signal can be transfused to the grid of the 5th transistor (M5) thus.The 5th transistor (M5) can be cut off when led control signal is applied on it, and can be switched on it the time not applying led control signal.
More particularly, the anode electrode of OLED can be coupled to the 5th transistor (M5), and the cathode electrode of OLED can be coupled to second source (ELVSS), and OLED can be according to producing the light with predetermined luminance by transistor seconds (M2) by the electric current that the 5th transistor (M5) applies thus.The first transistor (M1), holding capacitor (Cst) and compensating unit 142 can be configured in and be similar to substantially in the preceding structure of describing according to Fig. 2, therefore, no longer they are made detailed description at this.Transistor seconds (M2) can dispose to be similar to substantially in the preceding mode of describing according to Fig. 2, is coupled to first electrode of the 5th transistor (M5) except making its second electrode.
With reference to Figure 13, pixel 240 can be similar to the pixel of describing according to Fig. 3 preceding 240 substantially, except comprising the 5th transistor (M5) to make the inessential electric current that flows into OLED substantially and minimize and/or to stop the inessential electric current that flows into OLED.
With reference to figure 13-14, the operation of pixel 240 can be as follows.At first, first control signal, promptly high voltage pulse can be applied to first control line (CL1n), and the 4th transistor (M4) can be cut off thus.Therefore, first node (N1) can be separated by electricity with voltage source (Vsus), promptly at the 4th transistor (M4) when being cut off.
When the 4th transistor (M4) when being cut off, second control signal, promptly low voltage signal can be applied to second control line (CL2n), and the 3rd transistor (M3) can be switched on thus.Simultaneously, led control signal, promptly high voltage pulse can be applied to light emitting control line (En), and the 5th transistor (M5) can be cut off thus.When the 3rd transistor (M3) when being switched on, the voltage of OLED (Voled) can be applied to first node (N1).In this respect, should note because the 5th transistor (M5) is cut off, so voltage (Voled) can be set to the threshold voltage of OLED.
Next, sweep signal can be applied to sweep trace (Sn), and the first transistor (M 1) can be switched on thus.When the first transistor (M1) when being switched on, with the data-signal that is applied to data line (Dm) corresponding to voltage can be transmitted through the first transistor (M1), and can be stored in the holding capacitor (Cst).When data-signal was stored, the first transistor (M1) can be ended sweep signal and be ended.
Next, applying of second control signal and led control signal can be ended, thus can be respectively with the 3rd transistor by and with the 5th transistor (M5) conducting.Then, first control signal can be ended with conducting the 4th transistor (M4).When the 4th transistor (M4) when being switched on, the voltage of first node (N1) can be added to the voltage of voltage source (Vsus), thereby causes the increase of the grid voltage of transistor seconds (M2).The grid voltage of transistor seconds (M2) can calculate according to equation 1.
Therefore, when the OLED deterioration, the voltage (Voled) of the degradation of reflection OLED can be lowered, thereby therefore the voltage of reduction first node (N1) also reduce the grid voltage of transistor seconds (M2).But according to embodiments of the invention, voltage source (Vsus) is set can increase the current capacity of transistor seconds (M2) so that corresponding identical data-signal with voltage that increases first node (N1) and the grid voltage that therefore increases transistor seconds (M2).In other words, the current capacity of transistor seconds (M2) can be along with the increase of the degradation of OLED and is increased, and can compensate the brightness of the minimizing that the deterioration of OLED causes thus.In this respect, should note can be according to aforementioned any structure configuration compensating unit 142 of describing about Fig. 5-10.
According to another embodiment shown in Figure 15, compensating unit 142h can be similar to the compensating unit of describing according to Fig. 13 preceding 142 substantially, except being coupled to light emitting control line (En), rather than be coupled to first and second control lines (CL1) and (CL2) in addition.More particularly, compensating unit 142h can be included in above-mentioned according to the feedback condenser (Cfb) in the described essentially identical structure of Figure 13 and third and fourth transistor (M3) and (M4), except third and fourth transistor (M3) and (M4) both led control signal controls of being coupled to light emitting control line (En) and being provided by light emitting control line (En) are provided.
More particularly, with first, second, the 4th compare with (M5) with the 5th transistor (M1), (M2), (M4), the 3rd transistor (M3) can have opposite conduction.For example, as shown in figure 15, third and fourth transistor (M3) and (M4) can be respectively nmos type and pmos type transistor.Therefore, the led control signal that is provided to light emitting control line (En) can make the 3rd transistor (M3) open-minded, and the 4th transistor (M4) is turn-offed.Similarly, when the supply of the led control signal that provides from light emitting control line (En) stopped, third and fourth transistor (M3) and mode of operation (M4) can overturn, promptly, the 3rd transistor (M3) can be turned off, and the 4th transistor (M4) can be by open-minded.The compensating unit 142h that is depicted among Figure 15 can advantageously remove with first and second control lines (CL1n) with (CL2n).
The operation of compensating unit 142h can be similar to the operation at the compensating unit 142 of preceding description according to Figure 13-14 substantially, and also can illustrate with reference to Figure 14.At first, sweep signal be applied to sweep trace (Sn) before led control signal can be applied to light emitting control line (En).Therefore, the 4th and the 5th transistor (M4) and (M5) can be cut off, and the 3rd transistor (M3) can be switched on.When the 3rd transistor (M3) when being switched on, the voltage of OLED (Voled) can be applied to first node (N 1).
Then, sweep signal can be applied to sweep trace (Sn) with conducting the first transistor (M1).When the first transistor (M1) when being switched on, can be stored in the holding capacitor (Cst) corresponding to the voltage of the data-signal that is applied to data line (Dm), then end sweep signal, the first transistor (M1) can be cut off thus.When the first transistor (M1) when being cut off, applying of led control signal can be ended, thus conducting the 4th and the 5th transistor (M4) and (M5).When the 4th transistor (M4) when being switched on, the voltage of first node (N1) rises to the voltage of voltage source (Vsus), can increase the grid voltage of transistor seconds (M2) thus.Therefore, by the increment of the grid voltage of transistor seconds (M2) being adjusted to deterioration, can compensate the deterioration of OLED corresponding to OLED.
According to another embodiment shown in Figure 16, compensating unit 142i can be similar to the compensating unit 142 in preceding description according to Figure 13 substantially, except being coupled to light emitting control line (En) and sweep trace (Sn), rather than be coupled to first and second control lines (CL1) and (CL2) outside.More particularly, compensating unit 142i can be included in above-mentioned according to the feedback condenser (Cfb) in the described essentially identical structure of Figure 13 and third and fourth transistor (M3) and (M4), except making third and fourth transistor (M3) and (M4) being coupled to sweep trace (Sn) and light emitting control line (En) and be scanned line (Sn) respectively and light emitting control line (En) is controlled respectively.Compensating unit 142i shown in Figure 16 can advantageously remove first and second control lines (CL1n) and (CL2n).
The operation of compensating unit 142i can be similar to the operation at the compensating unit 142 of preceding description according to Figure 13-14 substantially, and also can illustrate with reference to Figure 14.At first, sweep signal be applied to sweep trace (Sn) before led control signal can be applied to light emitting control line (En).Therefore, the 4th and the 5th transistor (M4) and (M5) can be cut off.
Then, sweep signal can be applied to sweep trace (Sn) with conducting first and the 3rd transistor (M1) and (M3).When the first transistor (M1) when being switched on, voltage corresponding to the data-signal that is applied to data line (Dm) can be stored in the holding capacitor (Cst), and when the 3rd transistor (M3) when being switched on, the voltage of OLED (Voled) can be applied to first node (N1).Be stored in reservior capacitor (Cst) afterwards at voltage, can end the first transistor (M1) and the 3rd transistor (M3) by ending sweep signal corresponding to data-signal.When the first and the 3rd transistor (M1) and (M3) being cut off, applying of led control signal can be ended, thus conducting the 4th and the 5th transistor (M4) and (M5).When the 4th transistor (M4) when being switched on, the voltage of first node (N1) rises to the voltage of voltage source (Vsus), and the grid voltage of transistor seconds (M2) can be increased thus.Therefore, by the increment of the grid voltage of transistor seconds (M2) is adjusted to the deterioration that can compensate OLED corresponding to the deterioration of OLED.
According to another embodiment shown in Figure 17, compensating unit 142j can be similar to the compensating unit 142 in preceding description according to Figure 13 substantially, except being coupled to sweep trace (Sn), rather than be coupled to first and second control lines (CL1) and (CL2) outside.More particularly, compensating unit 142j can be included in above-mentioned according to the feedback condenser (Cfb) in the described essentially identical structure of Figure 13 and third and fourth transistor (M3) and (M4), except making the 3rd, the 4th and the 5th transistor (M3), (M4) and (M5) being coupled to sweep trace (Sn) and being scanned the sweep signal control that line (Sn) applies.
More particularly, compare the 4th and the 5th transistor (M4) and (M5) can have opposite conduction with (M3) with the 3rd transistor (M1), (M2) with first, second.For example, shown in Fig. 17, the 4th and the 5th transistor (M4) and (M5) can be nmos type transistor.Therefore, the sweep signal that is applied to sweep trace (Sn) can make the 4th and the 5th transistor (M4) and (M5) end, but and conducting the 3rd transistor (M3), vice versa.Compensating unit 142j shown in Figure 17 can advantageously remove first and second control lines (CL1n) and (CL2n) and light emitting control line (En).
The operation of compensating unit 142j can be similar to the operation at the compensating unit 142 of preceding description according to Figure 13-14 substantially, and also can illustrate with reference to Figure 14.At first, sweep signal can be applied to sweep trace (Sn) with conducting first and the 3rd transistor (M1) and (M3), and by the 4th and the 5th transistor (M4) and (M5).When the first transistor (M1) when being switched on, can be stored in the holding capacitor (Cst) corresponding to the voltage of the data-signal that is applied to data line (Dm).When the 3rd transistor (M3) when being switched on, the voltage of OLED (Voled) can be applied to first node (N1).The voltage (Voled) that is stored in holding capacitor (Cst) and while OLED at the voltage corresponding to data-signal is applied to first node (N1) afterwards, the applying of sweep signal can be ended so that the first and the 3rd transistor (M1) and (M3) end, and make the 4th and the 5th transistor (M4) and (M5) conducting.When the 4th transistor (M4) when being switched on, the voltage of first node (N1) rises to the voltage of voltage source (Vsus), can increase the grid voltage of transistor seconds (M2) thus.Therefore, by the increment of the grid voltage of transistor seconds (M2) is adjusted to the deterioration that can compensate OLED corresponding to the deterioration of OLED.
Though disclose one exemplary embodiment of the present invention here, and used specific term, they just are used as general and descriptive explanation is not limited to effect.Therefore, those of ordinary skill of the present invention it will be appreciated that under the spirit and scope of the present invention that claim proposed that do not break away from subsequently, can make different changes in form and details.

Claims (22)

1. pixel comprises:
Organic Light Emitting Diode between first and second power supplys;
Be coupled to the first transistor of sweep trace and data line, described the first transistor is configured to receive data-signal by described data line when sweep signal is applied to described sweep trace;
Be configured to store holding capacitor with the described data-signal correspondent voltage that receives by described the first transistor;
Be coupled to described the first transistor and be configured to and pass through the transistor seconds of described Organic Light Emitting Diode from described first power supply to the electric current of described second source according to the described Control of Voltage that is stored in the described holding capacitor; And
Be configured to adjust the compensating unit of the grid voltage of described transistor seconds, voltage is adjusted the degradation of the described Organic Light Emitting Diode of adequate remedy.
2. according to the pixel of claim 1, wherein said compensating unit comprises:
Be coupled to the 3rd transistor of the anode electrode of described Organic Light Emitting Diode;
The 4th transistor between described the 3rd transistor and voltage source, described voltage source have the voltage higher than the voltage of the anode electrode of described Organic Light Emitting Diode; And
Be coupling in the grid of described transistor seconds and the feedback condenser between the described third and fourth transistorized common node.
3. according to the pixel of claim 2, wherein the voltage of the described third and fourth transistorized common node is substantially equal to the voltage of the anode electrode of described Organic Light Emitting Diode when described the 3rd transistor is switched on, and is substantially equal to the voltage of described voltage source when described the 4th transistor is switched on.
4. according to the pixel of claim 3, wherein said feedback condenser is configured to the voltage of the grid of described transistor seconds is adjusted to voltage corresponding to the described third and fourth transistorized common node.
5. according to the pixel of claim 3, wherein said the 4th transistor be configured to when first control line applies first control signal by and conducting when applying of described first control signal ended, and described the 3rd transistor is configured to end in conducting when second control line applies second control signal and applying when being ended of described second control signal.
6. according to the pixel of claim 5, wherein said first and second control signals have opposite polarity, and each of described first and second control signals is with to be applied to the sweep signal of described sweep trace overlapping.
7. according to the pixel of claim 3, wherein said the 4th transistor is configured to ending when first control line applies first control signal, and described the 3rd transistor is configured to conducting when applying described first control signal from described first control line, and described third and fourth transistor has different conduction.
8. according to the pixel of claim 7, wherein said the 3rd transistor is a nmos type transistor.
9. according to the pixel of claim 3, wherein said the 4th transistor is configured to ending when first control line applies first control signal and be switched on when described first control signal is ended, described the 3rd transistor is configured to conducting when sweep signal is applied to described sweep trace, and described first control signal and described sweep signal overlaid.
10. according to the pixel of claim 3, wherein said the 4th transistor is configured to end when described sweep signal is applied to described sweep trace, and described the 3rd transistor is configured to conducting when described sweep signal is applied to described sweep trace, and described third and fourth transistor has different conduction.
11. according to the pixel of claim 2, wherein said voltage source is configured to have than the lower magnitude of voltage of described first power supply.
12. according to the pixel of claim 2, wherein said voltage source is described first power supply, the reverse voltage that applies by described sweep trace, or the reverse voltage that applies of the sweep trace by neighbor.
13. according to the pixel of claim 2, the capacity of wherein said feedback condenser is configured to material corresponding to described Organic Light Emitting Diode according to the color from the light of described Organic Light Emitting Diode emission.
14. according to the pixel of claim 2, also be included in the 5th transistor between described transistor seconds and the described Organic Light Emitting Diode, described the 5th transistor is configured to be cut off when applying sweep signal at least.
15. according to the pixel of claim 14, wherein said the 5th transistor is configured to end when led control signal is applied to the light emitting control line, and is configured to conducting when applying of described led control signal ended.
16. according to the pixel of claim 15, wherein said led control signal and described sweep signal overlaid.
17. an organic light-emitting display device comprises:
Be coupled to a plurality of pixels of sweep trace and data line;
Be configured to apply the scanner driver of sweep signal by described sweep trace; And
Be configured to drive the data driver of described data line,
Each pixel in wherein said a plurality of pixel comprises:
Organic Light Emitting Diode between first and second power supplys;
Be coupled to the first transistor of sweep trace and data line, described the first transistor is configured to receive data-signal by described data line when sweep signal is applied to described sweep trace;
Be configured to store holding capacitor with the described data-signal correspondent voltage that receives by described the first transistor;
Be coupled to described the first transistor and be configured to and pass through the transistor seconds of described Organic Light Emitting Diode from described first power supply to the electric current of described second source according to the described Control of Voltage that is stored in the described holding capacitor; And
Be configured to adjust the compensating unit of the grid voltage of described transistor seconds, voltage is adjusted the degradation of the described Organic Light Emitting Diode of adequate remedy.
18. a method that drives organic light-emitting display device, this method comprises:
When sweep signal is applied to sweep trace, in the first transistor, receive data-signal by data line;
Storage and described data-signal correspondent voltage in holding capacitor, described holding capacitor is coupled to the grid of transistor seconds;
The voltage of first end of feedback condenser is adjusted to the voltage of the anode electrode of Organic Light Emitting Diode, and described feedback condenser has second end of the grid that is coupled to described transistor seconds; And
End described sweep signal, the voltage of first end of described feedback condenser is added to the voltage level of voltage source thus.
19. according to the method for the driving organic light-emitting display device of claim 18, wherein said transistor seconds according to the grid voltage control of described transistor seconds from first power supply by the current capacity of described Organic Light Emitting Diode to second source.
20. according to the method for the driving organic light-emitting display device of claim 18, the voltage level of wherein said voltage source is the voltage that is higher than the anode electrode voltage of described Organic Light Emitting Diode, and is lower than described first power source voltage.
21. according to the method for the driving organic light-emitting display device of claim 18, electricity disconnected described transistor seconds and described Organic Light Emitting Diode during the voltage that wherein increases by first end of described feedback condenser was included in applying of sweep signal.
22. according to the method for the driving organic light-emitting display device of claim 18, the voltage of the anode electrode of wherein said Organic Light Emitting Diode is the threshold voltage of described Organic Light Emitting Diode.
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