CN203689881U - Pixel drive circuit, array baseboard and display device - Google Patents
Pixel drive circuit, array baseboard and display device Download PDFInfo
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- CN203689881U CN203689881U CN201320884130.7U CN201320884130U CN203689881U CN 203689881 U CN203689881 U CN 203689881U CN 201320884130 U CN201320884130 U CN 201320884130U CN 203689881 U CN203689881 U CN 203689881U
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Abstract
The utility model discloses a pixel drive circuit, an array baseboard and a display device, and the pixel drive circuit can comprise a drive unit, a switch unit, a threshold voltage compensation module and a luminescent device, wherein the threshold voltage compensation module is respectively connected to a scanning signal wire, a first control wire, a second control wire, a second power source and the switch unit, the luminescent device is respectively connected to the second power source and the threshold voltage compensation module, the drive unit is respectively connected to a first power source and the threshold voltage compensation module, and the switch unit is respectively connected to the scanning signal wire and a data signal wire; and the threshold voltage compensation module comprises a threshold voltage maintenance unit, an anti-interference unit, an assistant gate and a charge-discharge control switch unit. With the utility model, working current of the luminescent device has nothing to do with threshold voltage of the drive unit, so that luminescent brightness of the luminescent device is uniform and thus evenness of the luminescent bright of the display device is increased.
Description
Technical field
The utility model relates to display technique field, particularly a kind of pixel-driving circuit, array base palte and display device.
Background technology
Along with the progress of display technique, increasing active matrix organic light-emitting diode (Active Matrix Organic Light Emitting Diode, be called for short: AMOLED) display device comes into the market, with respect to traditional thin-film transistor LCD device (Thin Film Transistor Liquid Crystal Display, be called for short: TFT LCD), AMOLED display device has reaction velocity faster, higher contrast and more vast visual angle, and therefore AMOLED display device is subject to the attention of increasing panel vendor.
Fig. 1 is the structural representation of AMOLED pixel-driving circuit in prior art, as shown in Figure 1, this pixel-driving circuit comprises the first film transistor (Thin Film Transistor, be called for short: TFT) (Organic Light-Emitting Diode is called for short: OLED) for T1, the second thin film transistor (TFT) T2, capacitor C and machine light-emittingdiode.Wherein, the grid of the second thin film transistor (TFT) T2 is connected with scan signal line, the scanning voltage that scan signal line provides is Vscan, the drain electrode of the second thin film transistor (TFT) T2 is connected with data signal line, the data voltage that data signal line provides is Vdata, the source electrode of the second thin film transistor (TFT) T2 is connected with the grid of the first film transistor T 1, the drain electrode of the first film transistor T 1 is connected with the negative electrode of OLED, the source electrode of the first film transistor T 1 is connected with the first power supply, the first supply voltage Vss that the first power supply provides is low level, the two ends of capacitor C are connected with grid and the source electrode of the first film transistor T 1 respectively, the anode of OLED is connected with second source, the second source voltage Vdd that second source provides is high level.Fig. 2 is the pixel driver sequential chart of AMOLED pixel-driving circuit in Fig. 1, as shown in Figure 2, in the t1 time period, Vscan in high level so that T2 open, now data signal line is written to Vdata the grid of capacitor C and T1, T1 is opened, thereby the negative electrode of OLED is connected with Vss, OLED starts working and is luminous.In the t2 time period, Vscan in low level so that T2 close, now due to the electric charge maintenance effect of capacitor C, the grid of T1 will maintain high level state, and T1 continues to open, and OLED will work on, until when Vscan is high level sometime below, the luminance of OLED may change.As from the foregoing, T2 is controlling writing of data voltage Vdata, and T1 is controlling the duty of OLED, and therefore T2 is commonly referred to switching TFT (Switch TFT), and T1 is called drive TFT (Drive TFT), and capacitor C mainly plays voltage maintenance effect.
In the AMOLED pixel-driving circuit that prior art provides, the threshold voltage of T1 can change to some extent along with the deviation of technique, after T1 unlatching, the working current of OLED is relevant with the threshold voltage of T1, and the luminosity of OLED is quite responsive to the variation of its working current, and therefore the luminosity that makes OLED is produced sizable variation by the variation of the threshold voltage of T1.And threshold voltage can because the fluctuation of technique or display device in the course of the work temperature variation and change, thereby can cause the luminosity of display device inhomogeneous.
Utility model content
The utility model provides a kind of pixel-driving circuit, array base palte and display device, for making the luminosity of luminescent device even, thus the homogeneity of the luminosity of raising display device.
For achieving the above object, the utility model provides a kind of pixel-driving circuit, comprise: driver element, switch element, threshold voltage compensation module and luminescent device, described threshold voltage compensation module respectively with scan signal line, the first control line, the second control line, second source is connected with switch element, described luminescent device is connected with described second source and described threshold voltage compensation module respectively, described driver element is connected with the first power supply and described threshold voltage compensation module respectively, described switch element is connected with described scan signal line and data signal line respectively,
Described threshold voltage compensation module comprises threshold voltage holding unit, anti-tampering unit, auxiliary gating unit and discharges and recharges gauge tap unit.
Alternatively, described threshold voltage holding unit comprises electric capacity, and described anti-tampering unit comprises the 3rd switching tube, and described auxiliary gating unit comprises the 4th switching tube, described in discharge and recharge control module and comprise the 5th switching tube;
The control utmost point of described the 3rd switching tube is connected with described scan signal line, and first utmost point of described the 3rd switching tube is connected with first utmost point of described second source and described luminescent device, and second utmost point of described the 3rd switching tube is connected with second utmost point of described luminescent device;
The control utmost point of described the 4th switching tube is connected with described the first control line, first utmost point of described the 4th switching tube is connected with second utmost point of second utmost point of described luminescent device and described the 3rd switching tube, and second utmost point of described the 4th switching tube is connected with first utmost point and the described driver element of described the 5th switching tube;
The control utmost point of described the 5th switching tube is connected with described the second control line, and second utmost point of described the 5th switching tube is connected with the second end of described electric capacity and described driver element;
First utmost point of described luminescent device is connected with described second source.
Alternatively, described driver element comprises the first switching tube, and described switch element comprises second switch pipe;
The control utmost point of described the first switching tube is connected with second utmost point of described the 5th switching tube and the second end of described electric capacity, first utmost point of described the first switching tube is connected with second utmost point of described the 4th switching tube and first utmost point of described the 5th switching tube, and second utmost point of described the first switching tube is connected with described the first power supply;
The control utmost point of described second switch pipe is connected with described scan signal line, and first utmost point of described second switch pipe is connected with described data signal line, and second utmost point of described second switch pipe is connected with the first end of described electric capacity.
Alternatively, the working current I=K (VH-VL) of described luminescent device
2, wherein, K is process constant, the high level of the data voltage that VH provides for described data signal line, the low level of the data voltage that VL provides for described data signal line.
Alternatively, described the first switching tube, described second switch pipe, described the 3rd switching tube, described the 4th switching tube and described the 5th switching tube are thin film transistor (TFT).
For achieving the above object, the utility model provides a kind of array base palte, comprising: above-mentioned pixel-driving circuit.
For achieving the above object, the utility model provides a kind of display device, comprising: above-mentioned array base palte.
Utility model the utlity model has following beneficial effect:
The pixel-driving circuit that the utility model provides, in the technical scheme of array base palte and display device, pixel-driving circuit comprises driver element, switch element, threshold voltage compensation module and luminescent device, threshold voltage compensation module respectively with scan signal line, the first control line, the second control line, second source is connected with switch element, luminescent device is connected with second source and threshold voltage compensation module respectively, driver element is connected with the first power supply and threshold voltage compensation module respectively, switch element is connected with scan signal line and data signal line respectively, pixel-driving circuit of the present utility model has nothing to do the working current of luminescent device and the threshold voltage of driver element, thereby make the luminosity of luminescent device even, and then improve the homogeneity of the luminosity of display device.
Accompanying drawing explanation
Fig. 1 is the structural representation of AMOLED pixel-driving circuit in prior art;
Fig. 2 is the pixel driver sequential chart of AMOLED pixel-driving circuit in Fig. 1;
The structural representation of a kind of pixel-driving circuit that Fig. 3 provides for the utility model embodiment mono-;
Fig. 4 is the pixel driver sequential chart of pixel-driving circuit in Fig. 3;
The process flow diagram of a kind of image element driving method that Fig. 5 provides for the utility model embodiment tetra-.
Embodiment
For making those skilled in the art understand better the technical solution of the utility model, the pixel-driving circuit, array base palte, display device and the image element driving method that the utility model are provided below in conjunction with accompanying drawing are described in detail.
The structural representation of a kind of pixel-driving circuit that Fig. 3 provides for the utility model embodiment mono-, as shown in Figure 3, this pixel-driving circuit comprises: driver element 11, switch element 12, threshold voltage compensation module 13 and luminescent device 14, threshold voltage compensation module 13 respectively with scan signal line, the first control line CT1, the second control line CT2, second source is connected with switch element 12, luminescent device 14 is connected with second source and threshold voltage compensation module 13 respectively, driver element 11 is connected with the first power supply and threshold voltage compensation module 13 respectively, switch element 12 is connected with scan signal line and data signal line respectively.Wherein, threshold voltage compensation mould 12 can comprise threshold voltage holding unit, anti-tampering unit, auxiliary gating unit and discharge and recharge gauge tap unit.
In the present embodiment, the first control line CT1 provides the first control voltage, the second control line CT2 provides the second control voltage, the first power supply provides the first supply voltage Vss, second source provides second source voltage Vdd, data signal line provides data voltage Vdata, and scan signal line provides scanning voltage Vscan.
The control utmost point of second switch pipe T2 is connected with scan signal line, and first utmost point of second switch pipe T2 is connected with data signal line, and second utmost point of second switch pipe T2 is connected with the first end of capacitor C;
In the present embodiment, threshold voltage holding unit comprises capacitor C, and anti-tampering unit comprises the 3rd switch transistor T 3, and auxiliary gating unit comprises the 4th switch transistor T 4, discharges and recharges control module and comprises the 5th switch transistor T 5.The control utmost point of the 3rd switch transistor T 3 is connected with scan signal line, and first utmost point of the 3rd switch transistor T 3 is connected with first utmost point of second source and luminescent device 14, and second utmost point of the 3rd switch transistor T 3 is connected with second utmost point of luminescent device 14; The control utmost point of the 4th switch transistor T 4 is connected with the first control line CT1, first utmost point of the 4th switch transistor T 4 is connected with second utmost point of second utmost point of luminescent device 14 and the 3rd switch transistor T 3, and second utmost point of the 4th switch transistor T 4 is connected with first utmost point and the driver element 11 of the 5th switch transistor T 5; The control utmost point of the 5th switch transistor T 5 is connected with the second control line CT2, and second utmost point of the 5th switch transistor T 5 is connected with the second end of capacitor C; The control utmost point of the first switch transistor T 1 is connected with second utmost point of the 5th switch transistor T 5 and the second end of capacitor C, and second utmost point of the first switch transistor T 1 is connected with the second end and the driver element of capacitor C; First utmost point of luminescent device 14 is connected with second source.Wherein, the 3rd switch transistor T 3 and luminescent device 14 are connected in parallel.
In the present embodiment, driver element 11 comprises the first switch transistor T 1, and switch element 12 comprises second switch pipe T2.The control utmost point of the first switch transistor T 1 is connected with second utmost point of the 5th switch transistor T 5 and the second end of capacitor C, first utmost point of the first switch transistor T 1 is connected with second utmost point of the 4th switch transistor T 4 and first utmost point of the 5th switch transistor T 5, and second utmost point of the first switch transistor T 1 is connected with the first power supply; The control utmost point of second switch pipe T2 is connected with scan signal line, and first utmost point of second switch pipe T2 is connected with data signal line, and second utmost point of second switch pipe T2 is connected with the first end of C electric capacity.
Fig. 4 is the pixel driver sequential chart of pixel-driving circuit in Fig. 3.Shown in Fig. 3 and Fig. 4, the course of work of the pixel-driving circuit in the present embodiment is described in detail.
In the charging stage, switch element 12 is opened, and data signal line provides low level, anti-tampering unit, auxiliary gating unit and discharge and recharge gauge tap unit controls second source threshold voltage holding unit is charged.Particularly, in the charging stage, under the control of the scanning voltage Vscan that second switch pipe T2 and the 3rd switch transistor T 3 provide at scan signal line, open, under the control of the first control voltage that the 4th switch transistor T 4 provides at the first control line CT1, open, under the control of the second control voltage that the 5th switch transistor T 5 provides at the second control line CT2, open, data signal line provides low level, and second source charges to capacitor C.Particularly, charging stage is the t1 time period, within the t1 time period, the scanning voltage Vscan that scan signal line provides is high level so that second switch pipe T2 and the 3rd switch transistor T 3 are opened, the first control line CT1 provide first to control voltage be high level so that the 4th switch transistor T 4 is opened, the second control line CT2 provide second to control voltage be high level so that the 5th switch transistor T 5 is opened.Because the 3rd switch transistor T 3 is opened, luminescent device 14 is by short circuit, and therefore luminescent device 14 is not worked.Because the 4th switch transistor T 4 and the 5th switch transistor T 5 are opened, therefore the second source voltage Vdd that second source provides arrives the 4th switch transistor T 4 via opening and the 5th switch transistor T 5 the control utmost point of the first switch transistor T 1 and capacitor C is charged simultaneously, now Vb=Vc=Vdd.Because second switch pipe T2 opens, the data voltage Vdata that therefore data signal line provides will be written into one end a point of capacitor C, now Va=Vdata.
At discharge regime, discharge and recharge gauge tap unit and driver element 11 and threshold voltage holding unit and form discharge loop.Particularly, at discharge regime, under the control of the scanning voltage Vscan that second switch pipe T2 and the 3rd switch transistor T 3 provide at scan signal line, open, under the control of the first control voltage that the 4th switch transistor T 4 provides at the first control line CT1, close, under the control of the second control voltage that the 5th switch transistor T 5 provides at the second control line CT2, open, the 5th switch transistor T 5, the first switch transistor T 1 and capacitor C form discharge loop.Particularly, discharge regime is the t2 time period, within the t2 time period, the scanning voltage Vscan that scan signal line provides is high level so that second switch pipe T2 and the 3rd switch transistor T 3 are opened, the first control line CT1 provide first to control voltage be low level so that the 4th switch transistor T 4 is closed, the second control line CT2 provide second to control voltage be high level so that the 5th switch transistor T 5 is opened.Because the 3rd switch transistor T 3 is opened, the 4th switch transistor T 4 is closed and the 5th switch transistor T 5 is opened, luminescent device 14 is by short circuit, therefore luminescent device 14 continues not work and first utmost point of the 5th switch transistor T 5 is not connected with second source, now the 5th switch transistor T 5, the first switch transistor T 1 and capacitor C form discharge loop, capacitor C electric discharge, until the voltage of the control utmost point of the first switch transistor T 1 (that is: b point voltage Vb) is discharged into Vth+Vss, now the first switch transistor T 1 is in critical opening, and in the time that this discharge loop continues electric discharge, the first switch transistor T 1 will be ended.Because second switch pipe T2 continues to open, and the data voltage Vdata that data signal line provides is low level VL, therefore the voltage Va=Vdata=VL that the first end a of capacitor C is ordered, the voltage Vb=Vth+Vss that the second end b of capacitor C is ordered, the voltage difference Vab=Va-Vb=VL-(Vth+Vss at capacitor C two ends), wherein, Vth is the threshold voltage of the first switch transistor T 1.
In the voltage adjusting stage, switch element 12 is opened, and data signal line provides high level, passing threshold voltage holding unit adjust driver element 11 the control utmost point voltage so that driver element 11 open.Particularly, in the voltage adjusting stage, under the control of the scanning voltage Vscan that second switch pipe T2 and the 3rd switch transistor T 3 provide at scan signal line, open, under the control of the first control voltage that the 4th switch transistor T 4 provides at the first control line CT1, close, under the control of the second control voltage that the 5th switch transistor T 5 provides at the second control line CT2, close, data signal line provides high level, adjust by capacitor C the first switch transistor T 1 the control utmost point voltage so that the first switch transistor T 1 open.Particularly, the voltage adjusting stage is the t3 time period, within the t3 time period, the scanning voltage Vscan that scan signal line provides is high level so that second switch pipe T2 and the 3rd switch transistor T 3 are opened, the first control line CT1 provide first to control voltage be low level so that the 4th switch transistor T 4 is closed, the second control line CT2 provide second to control voltage be low level so that the 5th switch transistor T 5 is closed.Because the 3rd switch transistor T 3 is opened, luminescent device 14 is by short circuit, and therefore luminescent device 14 continues not work.All close due to the 4th switch transistor T 4 and the 5th switch transistor T 5, therefore the second end b point of capacitor C is in suspended state.Because the data voltage Vdata that second switch pipe T2 opens and data signal line provides is high level VH, the data voltage Vdata that therefore data signal line provides will be written into the first end a point of capacitor C, now Va=Vdata=VH.Because the second end b point of capacitor C is in suspended state, from law of conservation of charge, when now the voltage difference at capacitor C two ends is with the t2 time period, the voltage difference at capacitor C two ends is identical, therefore Vb=Va-Vab=VH-Vab=VH-VL+(Vth+Vss), thus make the first switch transistor T 1 in opening.
In the driving stage, switch element 12 is closed, and driver element 11 is opened and driven luminescent device 14 luminous under the effect that maintains of threshold voltage holding unit.Particularly, in the driving stage, under the control of the scanning voltage Vscan that second switch pipe T2 and the 3rd switch transistor T 3 provide at scan signal line, close, under the control of the first control voltage that the 4th switch transistor T 4 provides at the first control line CT1, open, under the control of the second control voltage that the 5th switch transistor T 5 provides at the second control line CT2, close, the first switch transistor T 1 is opened and is driven luminescent device 14 luminous under the effect that maintains of capacitor C.Particularly, the driving stage is the t4 time period, within the t4 time period, the scanning voltage Vscan that scan signal line provides is low level so that second switch pipe T2 and the 3rd switch transistor T 3 switches close, the first control line CT1 provide first to control voltage be high level so that the 4th switch transistor T 4 is opened, the second control line CT2 provide second to control voltage be low level so that the 5th switch transistor T 5 is closed.Due to the effect that maintains of capacitor C, the voltage that the second end b of capacitor C is ordered is constant, the voltage Vb=VH-VL+(Vth+Vss that therefore the second end b of capacitor C is ordered), thus make the first switch transistor T 1 in opening.The electric current of first switch transistor T 1 of now flowing through is the working current of luminescent device 14.The working current I=K(Vgs-Vth of luminescent device 14)
2, wherein, Vgs is the gate source voltage of the first switch transistor T 1, and K is process constant, and this process constant is the constant relevant with physical dimension with the technological parameter of the first switch transistor T 1.Due to Vgs=Vb-Vss=VH-VL+(Vth+Vss)-Vss=VH-VL+Vth, therefore working current I=K (Vgs-Vth)
2=K(VH-VL+Vth-Vth)=K (VH-VL)
2.From the formula of the working current of upper luminescent device 14, the threshold voltage vt h of the working current of luminescent device 14 and the first switch transistor T 1 is irrelevant.
In follow-up time section, the first switch transistor T 1 will continue to open, and the luminance of luminescent device 14 will continue to keep, until next time period scanning voltage Vscan becomes high level.
In the present embodiment, the first switch transistor T 1, second switch pipe T2, the 3rd switch transistor T 3, the 4th switch transistor T 4 and the 5th switch transistor T 5 are thin film transistor (TFT).Controlling can be extremely grid, and first can be extremely drain electrode or source electrode, and correspondingly, second can be extremely source electrode or drain electrode.
In the present embodiment, luminescent device 14 is OLED.
Preferably, the pixel-driving circuit in the present embodiment is AMOLED pixel-driving circuit.
The pixel-driving circuit that the present embodiment provides comprises driver element, switch element, threshold voltage compensation module and luminescent device, threshold voltage compensation module respectively with scan signal line, the first control line, the second control line, second source is connected with switch element, luminescent device is connected with second source and threshold voltage compensation module respectively, driver element is connected with the first power supply and threshold voltage compensation module respectively, switch element is connected with scan signal line and data signal line respectively, pixel-driving circuit of the present utility model has nothing to do the working current of luminescent device and the threshold voltage of driver element, thereby make the luminosity of luminescent device even, and then improve the homogeneity of the luminosity of display device.The pixel-driving circuit that the present embodiment provides only comprises less thin film transistor (TFT) TFT and 1 capacitor C, its simple in structure and be easy to realize.
The utility model embodiment bis-provides a kind of array base palte, and this array base palte comprises: pixel-driving circuit, this pixel-driving circuit can adopt the pixel-driving circuit in above-described embodiment one, repeats no more herein.
Preferably, the array base palte in the present embodiment is AMOLED array base palte.
In the array base palte that the present embodiment provides, pixel-driving circuit comprises driver element, switch element, threshold voltage compensation module and luminescent device, threshold voltage compensation module respectively with scan signal line, the first control line, the second control line, second source is connected with switch element, luminescent device is connected with second source and threshold voltage compensation module respectively, driver element is connected with the first power supply and threshold voltage compensation module respectively, switch element is connected with scan signal line and data signal line respectively, the pixel-driving circuit of the present embodiment has nothing to do the working current of luminescent device and the threshold voltage of driver element, thereby make the luminosity of luminescent device even, and then improve the homogeneity of the luminosity of display device.
The utility model embodiment tri-provides a kind of display device, and this display device comprises: array base palte, this array base palte can adopt the array base palte in above-described embodiment two, repeats no more herein.
Preferably, the display device in the present embodiment is AMOLED display device.
In the display device that the present embodiment provides, pixel-driving circuit comprises driver element, switch element, threshold voltage compensation module and luminescent device, threshold voltage compensation module respectively with scan signal line, the first control line, the second control line, second source is connected with switch element, luminescent device is connected with second source and threshold voltage compensation module respectively, driver element is connected with the first power supply and threshold voltage compensation module respectively, switch element is connected with scan signal line and data signal line respectively, the pixel-driving circuit of the present embodiment has nothing to do the working current of luminescent device and the threshold voltage of driver element, thereby make the luminosity of luminescent device even, and then improve the homogeneity of the luminosity of display device.
The utility model embodiment tetra-provides a kind of image element driving method, the method is based on pixel-driving circuit, pixel-driving circuit comprises: driver element, charge/discharge unit, luminescent device and control module, control module is connected with scan signal line, the first control line, the second control line, driver element, charge/discharge unit, luminescent device, data signal line and second source respectively, charge/discharge unit is connected with driver element, and driver element is connected with the first power supply.
The process flow diagram of a kind of image element driving method that Fig. 5 provides for the utility model embodiment tetra-, as shown in Figure 5, this image element driving method comprises:
In the present embodiment, particularly, threshold voltage holding unit comprises electric capacity, anti-tampering unit comprises the 3rd switching tube, and auxiliary gating unit comprises the 4th switching tube, discharges and recharges control module and comprises the 5th switching tube, driver element comprises the first switching tube, and switch element comprises second switch pipe.The specific descriptions of above-mentioned each parts can, referring to shown in embodiment mono-and accompanying drawing 3, be repeated no more herein.
The pixel-driving circuit that the image element driving method that the present embodiment provides can provide by above-described embodiment one is realized, can be referring to above-described embodiment one for the description of pixel-driving circuit.
In the image element driving method that the present embodiment provides, open and anti-tampering unit at charging stage switch element, auxiliary gating unit and discharge and recharge gauge tap unit controls second source and data signal line charges to threshold voltage holding unit, open and discharge and recharge gauge tap unit and driver element and described threshold voltage holding unit at discharge regime switch element and form discharge loop, threshold voltage holding unit is charged so that driver element is opened in the switch element unlatching of voltage adjusting stage and data signal line, drive stage switch unit close and the maintain effect of driver element at threshold voltage holding unit under open and drive luminescent device luminous, the image element driving method of the present embodiment has nothing to do the working current of luminescent device and the threshold voltage of driver element, thereby make the luminosity of luminescent device even, and then improve the homogeneity of the luminosity of display device.
Be understandable that, above embodiment is only used to principle of the present utility model is described and the illustrative embodiments that adopts, but the utility model is not limited to this.For those skilled in the art, in the situation that not departing from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (7)
1. a pixel-driving circuit, it is characterized in that, comprise: driver element, switch element, threshold voltage compensation module and luminescent device, described threshold voltage compensation module is connected with scan signal line, the first control line, the second control line, second source and switch element respectively, described luminescent device is connected with described second source and described threshold voltage compensation module respectively, described driver element is connected with the first power supply and described threshold voltage compensation module respectively, and described switch element is connected with described scan signal line and data signal line respectively;
Described threshold voltage compensation module comprises threshold voltage holding unit, anti-tampering unit, auxiliary gating unit and discharges and recharges gauge tap unit.
2. pixel-driving circuit according to claim 1, it is characterized in that, described threshold voltage holding unit comprises electric capacity, and described anti-tampering unit comprises the 3rd switching tube, described auxiliary gating unit comprises the 4th switching tube, described in discharge and recharge control module and comprise the 5th switching tube;
The control utmost point of described the 3rd switching tube is connected with described scan signal line, and first utmost point of described the 3rd switching tube is connected with first utmost point of described second source and described luminescent device, and second utmost point of described the 3rd switching tube is connected with second utmost point of described luminescent device;
The control utmost point of described the 4th switching tube is connected with described the first control line, first utmost point of described the 4th switching tube is connected with second utmost point of second utmost point of described luminescent device and described the 3rd switching tube, and second utmost point of described the 4th switching tube is connected with first utmost point and the described driver element of described the 5th switching tube;
The control utmost point of described the 5th switching tube is connected with described the second control line, and second utmost point of described the 5th switching tube is connected with the second end of described electric capacity and described driver element;
First utmost point of described luminescent device is connected with described second source.
3. pixel-driving circuit according to claim 2, is characterized in that, described driver element comprises the first switching tube, and described switch element comprises second switch pipe;
The control utmost point of described the first switching tube is connected with second utmost point of described the 5th switching tube and the second end of described electric capacity, first utmost point of described the first switching tube is connected with second utmost point of described the 4th switching tube and first utmost point of described the 5th switching tube, and second utmost point of described the first switching tube is connected with described the first power supply;
The control utmost point of described second switch pipe is connected with described scan signal line, and first utmost point of described second switch pipe is connected with described data signal line, and second utmost point of described second switch pipe is connected with the first end of described electric capacity.
4. pixel-driving circuit according to claim 1, is characterized in that, the working current I=K (VH-VL) of described luminescent device
2, wherein, K is process constant, the high level of the data voltage that VH provides for described data signal line, the low level of the data voltage that VL provides for described data signal line.
5. pixel-driving circuit according to claim 3, is characterized in that, described the first switching tube, described second switch pipe, described the 3rd switching tube, described the 4th switching tube and described the 5th switching tube are thin film transistor (TFT).
6. an array base palte, is characterized in that, comprising: the arbitrary described pixel-driving circuit of claim 1 to 5.
7. a display device, is characterized in that, comprising: array base palte claimed in claim 6.
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| CN201320884130.7U CN203689881U (en) | 2013-12-27 | 2013-12-27 | Pixel drive circuit, array baseboard and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104464638A (en) * | 2014-12-29 | 2015-03-25 | 合肥鑫晟光电科技有限公司 | Pixel drive circuit and method, array substrate and display device |
| WO2016008232A1 (en) * | 2014-07-17 | 2016-01-21 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
-
2013
- 2013-12-27 CN CN201320884130.7U patent/CN203689881U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016008232A1 (en) * | 2014-07-17 | 2016-01-21 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
| US10147362B2 (en) | 2014-07-17 | 2018-12-04 | Boe Technology Group Co., Ltd. | Pixel circuit and display apparatus |
| US10943545B2 (en) | 2014-07-17 | 2021-03-09 | Boe Technology Group Co., Ltd. | Pixel circuit and display apparatus |
| CN104464638A (en) * | 2014-12-29 | 2015-03-25 | 合肥鑫晟光电科技有限公司 | Pixel drive circuit and method, array substrate and display device |
| US9984615B2 (en) | 2014-12-29 | 2018-05-29 | Boe Technology Group Co., Ltd. | Pixel driving circuit, driving method, array substrate and display device ensuring luminance uniformity of light-emitting device |
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