CN203966515U - Pixel-driving circuit and display device - Google Patents
Pixel-driving circuit and display device Download PDFInfo
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- CN203966515U CN203966515U CN201420256875.3U CN201420256875U CN203966515U CN 203966515 U CN203966515 U CN 203966515U CN 201420256875 U CN201420256875 U CN 201420256875U CN 203966515 U CN203966515 U CN 203966515U
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Abstract
The utility model provides a kind of pixel-driving circuit and display device.This pixel-driving circuit comprises signal wire, control line, power supply unit and driver element, also comprises compensating unit, and signal wire, control line, power supply unit and driver element are connected with compensating unit respectively; Power supply unit and driver element are respectively used to light-emitting component power supply is provided and drives; Signal wire and control line are respectively used to provide data-signal and control signal for compensating unit; Compensating unit is for carrying out threshold voltage compensation according to data-signal and control signal to driver element.This pixel-driving circuit is by arranging compensating unit, make the working current of driver element no longer be subject to the impact of its threshold voltage, thereby eliminate the threshold voltage of driver element to the impact of its working current, thoroughly solve the problem of the threshold voltage shift that driver element causes due to manufacturing process and long-time operation, and then guaranteed that the display brightness of light-emitting component is even.
Description
Technical field
The utility model relates to display technique field, is specifically related to a kind of pixel-driving circuit and display device.
Background technology
Organic light emitting display (AMOLED) is one of focus of current flat-panel monitor research field, compared with liquid crystal display (LCD), the advantages such as OLED has that low energy consumption, production cost are low, autoluminescence, wide visual angle and fast response time, at present, started to replace traditional LCD display at demonstration field OLED such as mobile phone, PDA, digital cameras.Wherein, pixel driver is the core technology content of AMOLED display, has important Research Significance.
Utilize stable Control of Voltage brightness different from TFT-LCD, OLED belongs to current drives, needs stable electric current to control luminous.As shown in Figure 1, traditional AMOLED pixel-driving circuit adopts 2T1C pixel-driving circuit.This circuit only has 1 drive TFT (being T2), a switching TFT (being T1) and a memory capacitance Cs composition.In the time of certain a line of sweep trace gating (i.e. scanning), Vscan is low level signal, T1 conducting, data-signal Vdata writes memory capacitance Cs, and after this line scanning finishes, Vscan becomes high level signal, T1 turn-offs, the grid voltage being stored on Cs drives T2 pipe, makes its generation current carry out driving OLED, ensures that OLED continues within a frame shows luminous.The current formula of drive TFT (being T2) in the time reaching capacity is I
oLED=K (V
gS-V
th)
2.
Due to the reason such as manufacturing process and device aging, the threshold voltage (V of the drive TFT of each pixel
th) can drift about, this has just caused the electric current that flows through each OLED pixel because of V
thvariation and change; In addition, because the threshold voltage of the drive TFT of each pixel exists unevenness, can directly cause the electric current that flows through each pixel OLED to change, make display brightness inequality, thereby affect the display effect of whole image.
Utility model content
For the above-mentioned technical matters existing in prior art, the utility model provides a kind of pixel-driving circuit and display device.This pixel-driving circuit is by arranging compensating unit, make the working current of driver element no longer be subject to the impact of its threshold voltage, thereby eliminate the threshold voltage of driver element to the impact of its working current, thoroughly solve the problem of the threshold voltage shift that driver element causes due to manufacturing process and long-time operation, and then the display brightness of guaranteeing light-emitting component is even, and promote the display effect of whole image.
The utility model provides a kind of pixel-driving circuit, for light-emitting component is driven; Comprise signal wire, control line, power supply unit and driver element, also comprise compensating unit, described signal wire, described control line, described power supply unit and described driver element are connected with described compensating unit respectively;
Described power supply unit and described driver element are respectively used to described light-emitting component voltage is provided and drives, and make described light-emitting component luminous;
Described signal wire and described control line are respectively used to provide data-signal and control signal for described compensating unit;
Described compensating unit is for carrying out threshold voltage compensation according to described data-signal and described control signal to described driver element.
Preferably, described control line comprises the first sweep trace, the second sweep trace and three scan line; Described power supply unit comprises the first power end and second source end; Described driver element comprises driving tube; Described compensating unit comprises: the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and electric capacity;
The grid of described the first switching tube is connected with described three scan line, first utmost point of described the first switching tube is connected with described the first power end, and second utmost point of described the first switching tube is connected with second utmost point of described second switch pipe and first utmost point of described driving tube respectively;
The grid of described second switch pipe is connected with the grid of described the second sweep trace and described the 4th switching tube respectively, first utmost point of described second switch pipe is connected with described signal wire, and second utmost point of described second switch pipe is connected with second utmost point of described the first switching tube and first utmost point of described driving tube respectively;
The grid of described the 3rd switching tube is connected with described the first sweep trace, and first utmost point of described the 3rd switching tube is connected with described signal wire, and second utmost point of described the 3rd switching tube is connected with first utmost point of described electric capacity;
The grid of described the 4th switching tube is connected with grid and described second sweep trace of described second switch pipe respectively, first utmost point of described the 4th switching tube is connected with the grid of described driving tube and second utmost point of described electric capacity respectively, and second utmost point of described the 4th switching tube is connected with first utmost point of described light-emitting component and second utmost point of described driving tube respectively; Second utmost point of described light-emitting component is connected with described second source end;
First utmost point of described electric capacity is connected with second utmost point of described the 3rd switching tube, and second utmost point of described electric capacity is connected with the grid of described driving tube and first utmost point of described the 4th switching tube respectively.
Preferably, described compensating unit also comprises the 5th switching tube, the grid of described the 5th switching tube is connected with the grid of described three scan line and described the first switching tube respectively, first utmost point of described the 5th switching tube is connected with second utmost point of described driving tube and second utmost point of described the 4th switching tube respectively, and second utmost point of described the 5th switching tube is connected with first utmost point of described light-emitting component.
Preferably, described the first switching tube, described second switch pipe, described the 3rd switching tube, described the 4th switching tube, described the 5th switching tube and described driving tube are P type thin film transistor (TFT).
Preferably, in the charging stage of described pixel-driving circuit, described the first sweep trace and described the second sweep trace gating, described three scan line turn-offs, described second switch pipe, described the 3rd switching tube and described the 4th switching tube are opened, described the first switching tube and described the 5th switching tube turn-off, so that the described data-signal that described signal wire provides charges to the grid of described driving tube, and make the grid of described driving tube obtain the voltage that can compensate its threshold voltage.
Preferably, in the driving stage of described pixel-driving circuit, described the first sweep trace keeps gating, described the second sweep trace turn-offs, described three scan line gating, described the first switching tube, described the 3rd switching tube and described the 5th switching tube are opened, and described second switch pipe and described the 4th switching tube turn-off, and on described signal wire, are applied with the data-signal identical with the described charging stage in the driving stage.
Preferably, in the driving stage of described pixel-driving circuit, described the first sweep trace keeps gating, described the second sweep trace turn-offs, described three scan line gating, described the first switching tube, described the 3rd switching tube and described the 5th switching tube are opened, and described second switch pipe and described the 4th switching tube turn-off, and on described signal wire, are applied with in the driving stage data-signal that carries out saltus step on the data-signal basis in the described charging stage.
Preferably, the absolute value of the data-signal of described charging stage and the data-signal of the saltus step data-signal after superimposed is greater than the absolute value of the data-signal of described charging stage.
Preferably, described the first switching tube, described second switch pipe, described the 3rd switching tube, described the 4th switching tube, described the 5th switching tube and described driving tube are N-type thin film transistor (TFT).
Preferably, described the first power end provides operating voltage, and described second source end provides reference voltage, and described operating voltage is greater than described reference voltage, described light-emitting component first very anodal, the second negative pole very of described light-emitting component.
Preferably, described the first power end provides reference voltage, and described second source end provides operating voltage, and described operating voltage is greater than described reference voltage, the first negative pole very of described light-emitting component, described light-emitting component second very anodal.
The utility model also provides a kind of display device, comprises light-emitting component, also comprises above-mentioned pixel-driving circuit, and described pixel-driving circuit is connected with described light-emitting component, for described light-emitting component is driven.
The beneficial effects of the utility model: pixel-driving circuit provided by the utility model, by compensating unit is set, compensating unit can carry out threshold voltage compensation to driver element according to the control signal on data-signal and control line on signal wire, make the working current of driver element no longer be subject to the impact of its threshold voltage, thereby eliminate the threshold voltage of driver element to the impact of its working current, thoroughly solve the problem of the threshold voltage shift that driver element causes due to manufacturing process and long-time operation, and then the display brightness of guaranteeing light-emitting component is even, and promote the display effect of whole image.
Display device provided by the utility model, by adopting above-mentioned pixel-driving circuit, can make the display brightness of this display device more even, thereby has promoted the display effect of this display device.
Brief description of the drawings
Fig. 1 is the structural representation of pixel-driving circuit in prior art;
Fig. 2 is the structural representation of pixel-driving circuit in the utility model embodiment 1;
Fig. 3 is pixel-driving circuit in Fig. 2 schematic diagram in the charging stage;
Fig. 4 is the driving sequential chart of the pixel-driving circuit in Fig. 2;
Fig. 5 is pixel-driving circuit in Fig. 2 schematic diagram in the stage of driving.
Embodiment
For making those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, a kind of pixel-driving circuit provided by the utility model and display device are described in further detail.
Embodiment 1:
The present embodiment provides a kind of pixel-driving circuit, for light-emitting component is driven, makes light-emitting component luminous; Comprise signal wire, control line, power supply unit and driver element, also comprise compensating unit, signal wire, control line, power supply unit and driver element are connected with compensating unit respectively; Power supply unit and driver element are respectively used to light-emitting component power supply is provided and drives; Signal wire and control line are respectively used to provide data-signal and control signal for compensating unit; Compensating unit is for carrying out threshold voltage compensation according to data-signal and control signal to driver element.
As shown in Figure 2, control line comprises the first sweep trace EM, the second sweep trace Scan (1) and three scan line Scan (2); Power supply unit comprises the first power end U1 and second source end U2; Driver element comprises driving tube T6; Compensating unit comprises: the first switch transistor T 1, second switch pipe T2, the 3rd switch transistor T 3, the 4th switch transistor T 4 and capacitor C.
The grid of the first switch transistor T 1 is connected with three scan line Scan (2), first utmost point of the first switch transistor T 1 is connected with the first power end U1, and second utmost point of the first switch transistor T 1 is connected with second utmost point of second switch pipe T2 and first utmost point of driving tube T6 respectively.
The grid of second switch pipe T2 is connected with the grid of the second sweep trace Scan (1) and the 4th switch transistor T 4 respectively, first utmost point of second switch pipe T2 is connected with signal wire, and second utmost point of second switch pipe T2 is connected with second utmost point of the first switch transistor T 1 and first utmost point of driving tube T6 respectively.
The grid of the 3rd switch transistor T 3 is connected with the first sweep trace EM, and first utmost point of the 3rd switch transistor T 3 is connected with signal wire, and second utmost point of the 3rd switch transistor T 3 is connected with first utmost point of capacitor C.
The grid of the 4th switch transistor T 4 is connected with grid and the second sweep trace Scan (1) of second switch pipe T2 respectively, first utmost point of the 4th switch transistor T 4 is connected with the grid of driving tube T6 and second utmost point of capacitor C respectively, and second utmost point of the 4th switch transistor T 4 is connected with first utmost point of light-emitting component OLED and second utmost point of driving tube T6 respectively; Second utmost point of light-emitting component OLED is connected with second source end U2.
First utmost point of capacitor C is connected with second utmost point of the 3rd switch transistor T 3, and second utmost point of capacitor C is connected with the grid of driving tube T6 and first utmost point of the 4th switch transistor T 4 respectively.
In the present embodiment, compensating unit also comprises the 5th switch transistor T 5, the grid of the 5th switch transistor T 5 is connected with the grid of three scan line Scan (2) and the first switch transistor T 1 respectively, first utmost point of the 5th switch transistor T 5 is connected with second utmost point of driving tube T6 and second utmost point of the 4th switch transistor T 4 respectively, and second utmost point of the 5th switch transistor T 5 is connected with first utmost point of light-emitting component OLED.
Wherein, the first switch transistor T 1, second switch pipe T2, the 3rd switch transistor T 3, the 4th switch transistor T 4, the 5th switch transistor T 5 and driving tube T6 are P type thin film transistor (TFT), so can reduce the manufacturing process of organic light emitting display; In addition, the control line in above-mentioned pixel-driving circuit only has three, and the energy consumption that can save this pixel-driving circuit can also reduce the interference between circuit simultaneously.
It should be noted that, 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, the 5th switch transistor T 5 and driving tube T6 can be also that the switching tube (as N-type thin film transistor (TFT)) with the other types of gating switch function also has same effect.In the time of the gate turn-on of thin film transistor (TFT), conducting between its first utmost point and second utmost point.In the time that the voltage of first utmost point of thin film transistor (TFT) is high, electric current flows to second utmost point from first utmost point; In the time that the voltage of second utmost point of thin film transistor (TFT) is high, electric current flows to first utmost point from second utmost point.
The specific works process of this pixel-driving circuit is: as shown in Figure 3 and Figure 4, in the charging stage of pixel-driving circuit (being also 1 stage in Fig. 4), the first sweep trace EM and the second sweep trace Scan (1) gating, three scan line Scan (2) turn-offs, second switch pipe T2, the 3rd switch transistor T 3 and the 4th switch transistor T 4 are opened, the first switch transistor T 1 and the 5th switch transistor T 5 are turn-offed, so that the grid (be A point) of the data-signal that signal wire provides to driving tube T6 charges, and make the grid of driving tube T6 obtain the voltage that can compensate its threshold voltage.
In this charging stage, signal wire provides data-signal V
data, first utmost point that makes capacitor C is that the replacement of B point meets V
datasignal, if B point electromotive force is V
p, now, second utmost point of capacitor C is that the electromotive force that A is ordered is also V
p, V
pcan make driving tube T6 conducting, thereby make A point start charging, charging current direction is along the i1 direction in Fig. 3, until A point is charged to V
p-V
th(this voltage is the voltage that can compensate the threshold voltage of driving tube T6), now, the pressure reduction that A, B are 2 is V
th.In this process, because three scan line Scan (2) turn-offs, so in whole charging process, do not have electric current to pass through light-emitting component OLED (being that light-emitting component OLED can be not luminous), thereby indirectly reduced the life consumption of light-emitting component OLED.
As shown in Fig. 5 and Fig. 4, in the driving stage of pixel-driving circuit (being also 2 stages in Fig. 4), the first sweep trace EM keeps gating, the second sweep trace Scan (1) turn-offs, three scan line Scan (2) gating, the first switch transistor T 1, the 3rd switch transistor T 3 and the 5th switch transistor T 5 are opened, and second switch pipe T2 and the 4th switch transistor T 4 are turn-offed, the data-signal V being applied with in the charging stage in the driving stage on signal wire
dataon basis, carry out the data-signal Δ V of saltus step
data.
In this driving stage, first utmost point of capacitor C is that the B electromotive force of ordering is by original V
pbecome V
p+ Δ V
data, because second utmost point of capacitor C is that A point is floating, therefore to maintain A, 2 original pressure reduction of B (are V
th), the grid of driving tube T6 is that isobaric saltus step can occur the electromotive force that A is ordered, A point potential jump is V
p+ Δ V
data-V
th; Meanwhile, in this driving stage, first utmost point of driving tube T6 accesses the operating voltage V of the first power end U1
dd, electric current passes through the first switch transistor T 1, driving tube T6 and the 5th switch transistor T 5 successively along the direction of i2, light-emitting component OLED is started luminous.
In this driving stage, the data-signal V of charging stage
pdata-signal Δ V with saltus step
datadata-signal after superimposed is V
p+ Δ V
dataabsolute value be greater than the data-signal V of charging stage
pabsolute value.So can guarantee that driving tube T6 thoroughly opened in the driving stage, and in state of saturation, so that the normal brightness of light-emitting component OLED when showing carries out luminous.
Current formula while reaching capacity according to driving tube T6 can obtain:
I
OLED＝K(V
GS–V
th)
2＝K[V
dd–(V
p+△V
data–V
th)–V
th]
2＝K(V
dd–V
p–△V
data)
2
In above-mentioned current formula, V
gSrefer to that gate source voltage when driving tube T6 reaches capacity (is equivalent to the voltage V between first utmost point and the grid of driving tube T6
dd-(V
p+ △ V
data– V
th).
Derivation result by above-mentioned current formula can find out, in the driving stage, and the working current I of driving tube T6
oLEDbe not subject to its threshold voltage V
thimpact, only relevant with the data-signal applying on signal wire, thus the threshold voltage of having eliminated driving tube T6 is to its working current I
oLEDimpact, thoroughly solved the problem of the threshold voltage shift that driving tube T6 causes due to manufacturing process and long-time operation, and then guaranteed that the display brightness of light-emitting component OLED is even, and promoted the display effect of whole image.
In addition, as can be seen from Figure 4, the compensation of driving tube T6 threshold voltage has only continued two stages (being charging stage 1 and driving stage 2), and this has shortened the working time of whole pixel-driving circuit, can complete expeditiously the driving of whole circuit.
In the present embodiment, the first power end U1 provides operating voltage V
dd, second source end U2 provide reference voltage V
sS, light-emitting component OLED's is first very anodal, the second negative pole very of light-emitting component OLED.Under normal circumstances, operating voltage V
dd> reference voltage V
sS, so just can guarantee that light-emitting component OLED is normally luminous.In the present embodiment, reference voltage V
sSfor ground voltage, think reference voltage V
sSfor zero potential.
It should be noted that, in above-mentioned pixel-driving circuit, can be also that the first power end provides reference voltage, and second source end provides operating voltage, the first negative pole very of light-emitting component, light-emitting component second very anodal.Due to common operating voltage > reference voltage, so electric current can flow to from the second source end of high potential the first power end of low potential, therefore, the both positive and negative polarity wiring of light-emitting component is also just in time contrary, in a word, as long as guarantee have electric current to pass through in light-emitting component, can be luminous.
Embodiment 2:
The present embodiment provides a kind of pixel-driving circuit, as different from Example 1, in the driving stage of pixel-driving circuit, the first sweep trace keeps gating, the second sweep trace turn-offs, three scan line gating, and the first switching tube, the 3rd switching tube and the 5th switching tube are opened, second switch pipe and the 4th switching tube turn-off, and on signal wire, are applied with the data-signal identical with the charging stage in the driving stage.
In this driving stage, the electromotive force of first utmost point of electric capacity is still V
p, correspondingly, the electromotive force of the grid of driving tube is V
p-V
th, the current formula while reaching capacity according to driving tube can obtain:
I
OLED＝K(V
GS–V
th)
2＝K[V
dd–(V
p–V
th)–V
th]
2＝K(V
dd–V
p)
2
Can be found out by above-mentioned current formula, in the present embodiment, in the driving stage, the working current I of driving tube
oLEDequally be not subject to its threshold voltage V
thimpact, only relevant with the data-signal applying on signal wire, thus the threshold voltage of having eliminated driving tube is to its working current I
oLEDimpact, thoroughly solved the problem of the threshold voltage shift that driving tube causes due to manufacturing process and long-time operation, and then guaranteed that the display brightness of light-emitting component is even, and promoted the display effect of whole image.
In the present embodiment, other structures of pixel-driving circuit are in the same manner as in Example 1, repeat no more herein.
The beneficial effect of embodiment 1-2: the pixel-driving circuit in embodiment 1-2, by compensating unit is set, compensating unit can charge to the grid of driving tube in the charging stage according to the control signal on data-signal and control line on signal wire, make the grid of driving tube obtain the voltage that can compensate its threshold voltage, in the driving stage, driving tube is carried out to threshold voltage compensation, even if the working current of driving tube is no longer subject to the impact of its threshold voltage, thereby eliminate the threshold voltage of driving tube to the impact of its working current, thoroughly solve the problem of the threshold voltage shift that driving tube causes due to manufacturing process and long-time operation, and then the display brightness of guaranteeing light-emitting component is even, and promote the display effect of whole image.
Embodiment 3:
The present embodiment provides a kind of display device, comprises light-emitting component, also comprises the pixel-driving circuit of embodiment 1-2 in arbitrary, and pixel-driving circuit is connected with light-emitting component, for light-emitting component is driven.
Pixel-driving circuit in arbitrary by employing embodiment 1-2, can make the display brightness of this display device more even, thereby promote the display effect of this 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 (12)
1. a pixel-driving circuit, for driving light-emitting component; Comprise signal wire, control line, power supply unit and driver element, it is characterized in that, also comprise compensating unit, described signal wire, described control line, described power supply unit and described driver element are connected with described compensating unit respectively;
Described power supply unit and described driver element are respectively used to described light-emitting component voltage is provided and drives, and make described light-emitting component luminous;
Described signal wire and described control line are respectively used to provide data-signal and control signal for described compensating unit;
Described compensating unit is for carrying out threshold voltage compensation according to described data-signal and described control signal to described driver element.
2. pixel-driving circuit according to claim 1, is characterized in that, described control line comprises the first sweep trace, the second sweep trace and three scan line; Described power supply unit comprises the first power end and second source end; Described driver element comprises driving tube; Described compensating unit comprises: the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and electric capacity;
The grid of described the first switching tube is connected with described three scan line, first utmost point of described the first switching tube is connected with described the first power end, and second utmost point of described the first switching tube is connected with second utmost point of described second switch pipe and first utmost point of described driving tube respectively;
The grid of described second switch pipe is connected with the grid of described the second sweep trace and described the 4th switching tube respectively, first utmost point of described second switch pipe is connected with described signal wire, and second utmost point of described second switch pipe is connected with second utmost point of described the first switching tube and first utmost point of described driving tube respectively;
The grid of described the 3rd switching tube is connected with described the first sweep trace, and first utmost point of described the 3rd switching tube is connected with described signal wire, and second utmost point of described the 3rd switching tube is connected with first utmost point of described electric capacity;
The grid of described the 4th switching tube is connected with grid and described second sweep trace of described second switch pipe respectively, first utmost point of described the 4th switching tube is connected with the grid of described driving tube and second utmost point of described electric capacity respectively, and second utmost point of described the 4th switching tube is connected with first utmost point of described light-emitting component and second utmost point of described driving tube respectively; Second utmost point of described light-emitting component is connected with described second source end;
First utmost point of described electric capacity is connected with second utmost point of described the 3rd switching tube, and second utmost point of described electric capacity is connected with the grid of described driving tube and first utmost point of described the 4th switching tube respectively.
3. pixel-driving circuit according to claim 2, it is characterized in that, described compensating unit also comprises the 5th switching tube, the grid of described the 5th switching tube is connected with the grid of described three scan line and described the first switching tube respectively, first utmost point of described the 5th switching tube is connected with second utmost point of described driving tube and second utmost point of described the 4th switching tube respectively, and second utmost point of described the 5th switching tube is connected with first utmost point of described light-emitting component.
4. 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, described the 5th switching tube and described driving tube are P type thin film transistor (TFT).
5. pixel-driving circuit according to claim 4, it is characterized in that, in the charging stage of described pixel-driving circuit, described the first sweep trace and described the second sweep trace gating, described three scan line turn-offs, described second switch pipe, described the 3rd switching tube and described the 4th switching tube are opened, described the first switching tube and described the 5th switching tube turn-off, so that the described data-signal that described signal wire provides charges to the grid of described driving tube, and make the grid of described driving tube obtain the voltage that can compensate its threshold voltage.
6. pixel-driving circuit according to claim 5, it is characterized in that, in the driving stage of described pixel-driving circuit, described the first sweep trace keeps gating, described the second sweep trace turn-offs, described three scan line gating, and described the first switching tube, described the 3rd switching tube and described the 5th switching tube are opened, described second switch pipe and described the 4th switching tube turn-off, and on described signal wire, are applied with the data-signal identical with the described charging stage in the driving stage.
7. pixel-driving circuit according to claim 5, it is characterized in that, in the driving stage of described pixel-driving circuit, described the first sweep trace keeps gating, described the second sweep trace turn-offs, described three scan line gating, and described the first switching tube, described the 3rd switching tube and described the 5th switching tube are opened, described second switch pipe and described the 4th switching tube turn-off, and on described signal wire, are applied with in the driving stage data-signal that carries out saltus step on the data-signal basis in the described charging stage.
8. pixel-driving circuit according to claim 7, is characterized in that, the absolute value of the data-signal after the data-signal of described charging stage and the data-signal of saltus step are superimposed is greater than the absolute value of the data-signal of described charging stage.
9. 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, described the 5th switching tube and described driving tube are N-type thin film transistor (TFT).
10. according to the pixel-driving circuit described in claim 2-9 any one, it is characterized in that, described the first power end provides operating voltage, described second source end provides reference voltage, described operating voltage is greater than described reference voltage, described light-emitting component first very anodal, the second negative pole very of described light-emitting component.
11. according to the pixel-driving circuit described in claim 2-9 any one, it is characterized in that, described the first power end provides reference voltage, described second source end provides operating voltage, described operating voltage is greater than described reference voltage, the first negative pole very of described light-emitting component, described light-emitting component second very anodal.
12. 1 kinds of display device, comprise light-emitting component, it is characterized in that, also comprise the pixel-driving circuit described in claim 1-11 any one, and described pixel-driving circuit is connected with described light-emitting component, for described light-emitting component is driven.
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| CN201420256875.3U CN203966515U (en) | 2014-05-19 | 2014-05-19 | Pixel-driving circuit and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050914A (en) * | 2014-05-19 | 2014-09-17 | 京东方科技集团股份有限公司 | Pixel drive circuit, display device and pixel drive method |
| WO2023207057A1 (en) * | 2022-04-27 | 2023-11-02 | 惠科股份有限公司 | Pixel driving circuit, pixel driving method, and display apparatus |
-
2014
- 2014-05-19 CN CN201420256875.3U patent/CN203966515U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050914A (en) * | 2014-05-19 | 2014-09-17 | 京东方科技集团股份有限公司 | Pixel drive circuit, display device and pixel drive method |
| WO2015176425A1 (en) * | 2014-05-19 | 2015-11-26 | 京东方科技集团股份有限公司 | Pixel drive circuit, display device, and pixel drive method |
| WO2023207057A1 (en) * | 2022-04-27 | 2023-11-02 | 惠科股份有限公司 | Pixel driving circuit, pixel driving method, and display apparatus |
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