CN104021763B - The driving method of image element circuit, display device and image element circuit - Google Patents
The driving method of image element circuit, display device and image element circuit Download PDFInfo
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- CN104021763B CN104021763B CN201410261475.6A CN201410261475A CN104021763B CN 104021763 B CN104021763 B CN 104021763B CN 201410261475 A CN201410261475 A CN 201410261475A CN 104021763 B CN104021763 B CN 104021763B
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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]
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Abstract
The invention discloses the driving method of a kind of image element circuit, display device and image element circuit, it is related to display field, can solve the problems, such as driving tube threshold voltage shift caused by working long hours, reduce influence of the threshold voltage shift to display of driving tube, improve the display effect of AMOLED panel.The image element circuit includes：One light-emitting component；At least two groups of drive circuits；Coupling unit, for ensuring only one group of driving light-emitting component at least two groups of drive circuits.
Description
Technical field
The present invention relates to display field, more particularly to the driving method of a kind of image element circuit, display device and image element circuit.
Background technology
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) is that electric current drives active illuminant
Device, because it has self-luminous, quick response, wide viewing angle and can be produced on the first-class unique features of flexible substrate, using OLED as base
The organic light emitting display of plinth will turn into the main flow of display field.
Each display unit of organic light emitting display, is all made up of OLED, and organic light emitting display can by type of drive
It is divided into active organic light emitting display and passive organic light emitting display, wherein active organic light emitting display refers to each OLED by thin
Film transistor (Thin Film Transistor, TFT) circuit flows through OLED electric current to control, OLED and for driving OLED
TFT circuit form image element circuit.
A kind of typical image element circuit is as shown in figure 1, including 2 TFT transistors M1 and M2,1 electric capacity C and 1 OLED,
Wherein, TFT M2 grid is connected with scan signal line Vscan, and drain electrode is connected with data signal line Vdata, source electrode and TFT M1
Grid be connected, M1 drain electrode is connected with OLED negative electrode, and source electrode is connected with low level Vss；Electric capacity C both ends are connected across respectively
Between M1 grid and source electrode；OLED anode is connected with high level Vdd, and the TFT in Fig. 1 is as example using n-type TFT
Illustrate.
What Fig. 2 was provided is the driver' s timing figure of image element circuit described in Fig. 1, as shown in Fig. 2 the course of work of image element circuit is such as
Under：In the t1 periods, Vscan is in high level, therefore TFT M2 are opened, and at this moment Vdata high level is written to storage capacitance C
And TFT M1 grid so that TFT M1 are opened, and OLED negative electrode is connected with low level Vss, and OLED starts working luminous；
The t2 periods, Vscan is in low level, therefore TFT M2 are turned off, now because storage capacitance C electric charge holding acts on, TFT
M1 grid will continue to high level state so that TFT M1 are continued on, and OLED will work on, until below some when
When carving Vscan high level signal arrival, OLED luminance is only possible to change.From the foregoing, it will be observed that TFT M2 control number
According to line voltage Vdata write-in, and TFT M1 are the working conditions for controlling OLED, therefore TFT M2 are commonly referred to as switching tube
(Switch TFT), TFT M1 are referred to as driving tube (Driver TFT), and electric capacity C mainly plays voltage holding effect.
It is the course of work of general AMOLED pixel circuit above, there are the following problems for it：Working long hours can cause to drive
Dynamic TFT M1 threshold voltage drifts about, and OLED luminosity and M1 threshold voltage are closely related, namely TFT M1
Threshold voltage variation can influence OLED brightness homogeneity, and then influence the display effect of AMOLED panel.
The content of the invention
The technical problems to be solved by the invention are the driving for providing a kind of image element circuit, display device and image element circuit
Method, can solve the problems, such as driving tube threshold voltage shift caused by working long hours, reduce the threshold voltage shift of driving tube
Influence to display, improve the display effect of display device.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
A kind of image element circuit, including：One light-emitting component；At least two groups of drive circuits；Coupling unit, it is described for ensuring
At least two groups of drive circuits, which take turns to operate, drives the light-emitting component.
Alternatively, drive circuit described in every group comprises at least：For the switching tube of control data signal input, for storing
The electric capacity of data-signal, and for driving the driving tube of the light-emitting component.
Specifically, the drive circuit is two groups, respectively the first drive circuit and the second drive circuit；
For first drive circuit, the control pole of its switching tube is connected to the first scan signal line, its switching tube
First pole is connected to data signal line, and the second pole of its switching tube is connected with the control pole of its driving tube, and the first of its driving tube
Pole is extremely connected with the second of the light-emitting component, and the second pole of its driving tube is connected with low level signal line, the both ends of its electric capacity
It is connected in parallel on respectively between the control pole of its driving tube and the second pole, the first pole of light-emitting component is connected with operating voltage signal wire；
For second drive circuit, the control pole of its switching tube is connected to the second scan signal line, and the first pole of its switching tube connects
Be connected to data signal line, the second pole of its switching tube is connected with the control pole of its driving tube, the first pole of its driving tube with it is described
The second of light-emitting component is extremely connected, and the second pole of its driving tube is connected with low level signal line, and the both ends of its electric capacity are in parallel respectively
Between the control pole of its driving tube and the second pole.
Alternatively, the coupling unit includes：
First film transistor, its control pole are connected to the control pole of driving tube in first drive circuit, and it second
Pole is connected with low level signal line, and its first pole is connected to the control pole of driving tube in second drive circuit,
Second thin film transistor (TFT), its control pole are connected to the control pole of driving tube in second drive circuit, and it second
Pole is connected with low level signal line, and its first pole is connected to the control pole of driving tube in first drive circuit.
Alternatively, the driving tube, the switching tube, the first film transistor and second thin film transistor (TFT) are equal
For N-type TFT.
Alternatively, the driving tube, the switching tube, the first film transistor and second thin film transistor (TFT) are equal
For depletion type thin film transistor (TFT), or it is reinforced membranes transistor.
Alternatively, the light-emitting component is Organic Light Emitting Diode, wherein, first extremely organic hair of the light-emitting component
The anode of optical diode, the negative electrode of the second extremely Organic Light Emitting Diode of the light-emitting component.
The present invention also provides a kind of display device, sets above-mentioned any pixel circuit.
On the other hand, the present invention also provides a kind of driving method suitable for above-mentioned image element circuit, the image element circuit bag
Include：Light-emitting component and at least two groups of drive circuits, the driving method are：At least two groups of drive circuits take turns to operate driving
The light-emitting component.
Preferably, at least two groups of drive circuits, which take turns to operate, drives the light-emitting component, specifically includes：
In the first time period of N frames, the first scanning signal is high level, and the second scanning signal is low level, and first drives
The switching tube of circuit is opened, and it is to be driven in the first drive circuit that the high level of data line signal line, which is written to node a, the node a,
The control pole of dynamic pipe so that the electric capacity charging of the first drive circuit and the driving tube unlatching of the first drive circuit, light-emitting component
Start to light, now the switching tube shut-off of the second drive circuit, the first film transistor in coupling unit is opened so that second
The control pole of driving tube is connected with low level signal line in drive circuit, and node b is the driving of low level and the second drive circuit
Pipe is off state, and the node b is the control pole of driving tube in the second drive circuit,
In the second time period of N frames, the first scanning signal and the second scanning signal are low level, therefore first, second
Switching tube in drive circuit is turned off, and due to the electric charge holding effect of electric capacity in the first drive circuit, node a is still maintained
High level, the first film transistor in coupling unit continue on, and node b remains as low level, the drive of the second drive circuit
Dynamic pipe keeps luminance still in off state, light-emitting component；
In the first time period of N+1 frames, the first scanning signal is low level, and the second scanning signal is high level, and first drives
The switching tube shut-off of dynamic circuit, the switching tube of the second drive circuit are opened, and the high level of data line signal line is written to node b,
So that the electric capacity charging of the second drive circuit and the driving tube unlatching of the second drive circuit, light-emitting component start to light, now,
First film transistor shut-off in coupling unit, the second thin film transistor (TFT) are opened so that driving tube in the first drive circuit
Control pole is connected with low level signal line, and node a is changed into low level and the driving tube of the first drive circuit is off state,
In the second time period of N+1 frames, the first scanning signal and the second scanning signal are low level, therefore first,
The switching tube of two drive circuits is turned off, and due to the electric charge holding effect of electric capacity in the second drive circuit, node b is still maintained
High level, the second thin film transistor (TFT) in coupling unit continue on, and node a remains as low level, the drive of the first drive circuit
Dynamic pipe keeps luminance still in off state, light-emitting component, wherein, N is non-zero natural number.
The driving method of image element circuit provided by the invention, display device and image element circuit, its image element circuit be provided with to
Few two groups of drive circuits, each group drive circuit takes turns to operate driving light-emitting component during work, when each group drive circuit is in not work
When making state, the driving tube of corresponding drive circuit is in threshold voltage recovering state, thus this kind of circuit design can have
Effect improves driving tube threshold voltage shift problem caused by working long hours, so as to improve the display effect of display device.
Brief description of the drawings
Fig. 1 is the structural representation of existing image element circuit；
Fig. 2 is the driver' s timing figure of existing image element circuit；
Fig. 3 is the drive circuit schematic diagram in the embodiment of the present invention；
Fig. 4 is image element circuit schematic diagram provided in an embodiment of the present invention；
Fig. 5 is the driver' s timing figure of image element circuit shown in Fig. 4；
Fig. 6 is the driving method flow chart of image element circuit in the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides the driving method of a kind of image element circuit, display device and image element circuit, can solve to grow
Driving tube threshold voltage shift problem caused by time service, influence of the threshold voltage shift to display of driving tube is reduced, is carried
The display effect of high display device
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.Embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
It should be noted that for the transistor of field of liquid crystal display, drain electrode and source electrode are not distinguished clearly, because
The source electrode for the transistor being previously mentioned in this embodiment of the present invention can be the drain electrode of transistor, and the drain electrode of transistor can also be crystalline substance
The source electrode of body pipe.
The embodiment of the present invention provides a kind of image element circuit, and the circuit includes：Including：Light-emitting component；At least two groups of driving electricity
Road；Coupling unit, the light-emitting component is driven for ensuring that at least two groups of drive circuits take turns to operate.For the ease of to this
Patent is further understood, and explanation is described in detail to this patent in conjunction with accompanying drawing and specific embodiment.
Embodiment
The embodiment of the present invention provides a kind of image element circuit, and shown in reference picture 4, the circuit includes：Light-emitting component 14；At least two
Group drive circuit 11 and 12；Coupling unit 13, hair is driven for ensuring that at least two groups of drive circuits 11 and 12 take turns to operate
Optical element 14.
The embodiment of the present invention proposes a kind of AMOLED pixel circuit design, and the circuit is set using at least two groups of drive circuits
Meter, and cause one group therein when being in driving condition, remaining group is in off position, so that the driving of off position
Driving tube in circuit is in threshold voltage recovering state, and this kind of circuit design can be effectively improved the threshold voltage drift of driving tube
Shifting problem and the display effect for improving AMOLED panel.
It is driven in the prior art using one-level pixel-driving circuit, and the present embodiment is using parallel at least two groups of drives
Dynamic circuit, " drive circuit " wherein described in the present embodiment, any picture including but not limited to well-known to those skilled in the art
Plain drive circuit, for example, described " drive circuit " can be the exemplary pixels drive circuit shown in Fig. 1, including 2 TFT crystalline substances
Body pipe M1 and M2,1 electric capacity C and 1 OLED；Can also be more complicated pixel-driving circuit, such as can also band as shown in Figure 3
There is the pixel-driving circuit of compensation function.In general, every group of drive circuit comprises at least：For the input of control data signal
Switching tube, for storing the electric capacity of data-signal, and for driving the driving tube of light-emitting component.
Although the particular circuit configurations of drive circuit have no effect on the specific implementation effect of the present embodiment, the present embodiment is to driving
The particular circuit configurations of dynamic circuit also do not limit, but to ensure the unification of display effect, " at least two groups of drive circuits "
In every one drive circuit all should use identical circuit design.
It should be noted that selecting one group in turn in drive circuit more than two, in running order driving hair is allowed to
Optical element, those skilled in the art are readily conceivable that a variety of designs during specific implementation, and accordingly, there is also more for coupling unit
Kind design, and light-emitting component, at least two groups of drive circuits, the specific annexation of coupling unit depend on the specific of coupling unit
Design principle.
For the ease of being further understood to the present embodiment, in conjunction with accompanying drawing and specific embodiment to the embodiment of the present invention
It is described in detail explanation.
As shown in figure 4, specifically, image element circuit described in the embodiment of the present invention includes two groups of drive circuits, respectively first
The drive circuit 12 of drive circuit 11 and second, it is typical 2T1C structures；For the first drive circuit 11, its switch transistor T 3
Control pole is connected to the first scan signal line Vscan1, and the first pole of its switch transistor T 3 is connected to data signal line Vdata, and it is opened
The second pole for closing pipe T3 is connected with its driving tube T4 control pole, its driving tube T4 the first pole and light-emitting component OLED negative electrode
It is connected, its driving tube T4 the second pole is connected with low level signal line Vss, and its electric capacity C1 both ends are connected in parallel on its driving tube respectively
Between T4 control pole and the second pole；For the second drive circuit 12, the control pole of its switch transistor T 5 is connected to the second scanning letter
Number line Vscan2, the first pole of its switch transistor T 5 are connected to data signal line Vdata, and the second pole and its of its switch transistor T 5 drive
Pipe T6 control pole is connected, and its driving tube T6 the first pole is connected with light-emitting component OLED negative electrode, and the second of its driving tube T6
Pole is connected with low level signal line Vss, its electric capacity C2 both ends be connected in parallel on respectively its driving tube T6 control pole and the second pole it
Between.Wherein, light-emitting component OLED anode input service voltage VDD.
The coupling unit 13 includes：First film transistor T1, its control pole are connected in the first drive circuit 11 and driven
Dynamic pipe T4 control pole, its second pole are connected with low level signal line Vss, and its first pole is connected in the second drive circuit 12 and driven
Dynamic pipe T6 control pole；Second thin film transistor (TFT) T2, its control pole are connected to the control of driving tube T6 in the second drive circuit 12
Pole, its second pole are connected with low level signal line Vss, and its first pole is connected to the control of driving tube T4 in the first drive circuit 11
Pole.Light-emitting component 14 is Organic Light Emitting Diode (OLED).
Fig. 5 gives the pixel driver timing diagram of corresponding diagram 4, now electric to be set forth in following different time sections pixel respectively
The course of work on road.Carried out respectively exemplified by the course of work of N frames and N+1 frames (N is non-zero natural number) by image element circuit below
Explanation：
As shown in figure 5, in N frames above, when in the t1 periods, Vsca1 is high level, Vscan2 is low level, because
This TFT T3 is opened, and TFT T5 shut-offs, data line signal Vdata high level is written to node a by TFT T3, and electric capacity C1 fills
Electricity, therefore drive TFT T4 to open, OLED negative electrode is connected with low level Vss, and OLED, which starts working, to light, due to TFT T1's
Control pole is connected with node a, therefore TFT T1 are also opened, therefore its first pole is connected with low level Vss, namely driving TFT T6
Control pole is connected with low level Vss, and TFT T6 are off state, namely TFT T6 are in threshold voltage recovering state；In t2
Period, now Vscan1 and Vscan2 is low level, therefore switchs TFT T3 and T5 and be turned off, due to electric capacity C1 electric charge
Holding acts on, and node a is still maintained high level, and TFT T1 are continued on, and node b remains as low level, and TFT T6, which are in, to close
Disconnected state, OLED working conditions are kept.At this moment TFT T2 are constantly in off state, and electric capacity C2 both ends are in low level
Vss。
In N+1 frames below, when in the t3 periods, now Vscan1 is low level, and Vscan2 is high level, therefore
Switch TFT T5 to open, TFT T3 shut-offs, data line signal Vdata high level is written to node b by TFT T5, and electric capacity C2 fills
Electricity, therefore drive TFT T6 to open, OLED working conditions are adjusted to another luminance, due to TFT T3 shut-offs and TFT T2
Control pole be connected with node b, therefore TFT T2 are opened, and node a is connected with low level Vss, driving TFT T4 shut-offs, namely drive
Dynamic TFT T4 are in threshold voltage recovering state.Because TFT T1 control pole is connected with node a, therefore TFT T1 are turned off, electricity
The both ends for holding C1 are in low level Vss.
By the course of work of pixel driver in N frames and N+1 frame times above, when one group of driving therein electricity
Road, such as when TFT T3, T4 and electric capacity C1 and coupling TFT T1 in running order, one group of drive circuit in addition, such as
TFT T5, T6 and electric capacity C2 and coupling TFT T2 are at off position, and driving TFT T3 (T1) therein are in threshold value
Voltage recovers state, conversely, as the same.
6 thin film transistor (TFT)s (T1~T6) are N-type TFT shown in Fig. 4, for ease of manufacture, it is preferable that adopt
With the N-type TFT of same size.Further, driving tube T4 and T6, switch transistor T 3 and T5, first film transistor T1
It is depletion type thin film transistor (TFT) with the second thin film transistor (TFT) T2, or is reinforced membranes transistor.Wherein, alternatively,
Light-emitting component is Organic Light Emitting Diode (OLED).In embodiments of the present invention, the concrete model of each thin film transistor (TFT) is (i.e.
Each thin film transistor (TFT) is N-type or p-type, is depletion type or enhanced) it can not be used to limit image element circuit, it is common for this area
For technical staff, on the premise of not paying creative work, the type selecting of each thin film transistor (TFT) is changed and because type selecting changes
Caused connection changes, also within protection scope of the present invention.
First drive circuit is formed by TFT T3, T4 and electric capacity C1 in above-mentioned, second is formed by TFT T5, T6 and electric capacity C2
Drive circuit, the first drive circuit and the second drive circuit alternation driving light-emitting component, wherein in off position
Driving tube corresponding to drive circuit is in threshold voltage recovering state, thus this kind of circuit design can be effectively improved driving tube because
Threshold voltage shift problem caused by working long hours, so as to improve the display effect of display device.
First, second above-mentioned drive circuit also can be replaced the drive circuit shown in Fig. 3 with compensation function.During driving
Sequence increases control signal PR and ER (control signal PR and ER and the present invention are not related), its specific works mistake on the basis of Fig. 4
Journey (limiting part related to the present invention) is substantially similar with describing above, will not be described in detail herein.
Although in addition, being illustrated in the present embodiment by taking first, second two groups of parallel drive circuits as an example, can manage
Solution, drive circuit are not limited to two groups, for example, in image element circuit described in the present embodiment, can also set three groups of drivings
Circuit, operation principle are substantially similar：One frame is divided into three periods, each period controls first, second by frame scan signal
With the on/off of switching tube in the 3rd drive circuit, realize that each choosing period of time selects one group of drive circuit to carry out work in turn
Make.During one of which drive circuit works, the control pole of driving official in remaining group drive circuit is connect by low electricity by coupling unit
Flat Vss, it is at threshold voltage recovering state.
The embodiment of the present invention additionally provides a kind of display device, and it is provided with any one above-mentioned image element circuit.Due to
The image element circuit is provided with least two groups of drive circuits, and each group drive circuit takes turns to operate driving light-emitting component during work, when
When each group drive circuit is in off position, the driving tube of corresponding drive circuit is in threshold voltage recovering state, because
And this kind of circuit design can be effectively improved driving tube threshold voltage shift problem caused by working long hours, therefore this implementation
The example display device brightness is homogeneous, and display effect is more preferable.The display device can be：Electronic Paper, oled panel, mobile phone,
Any product or portion with display function such as tablet personal computer, television set, display, notebook computer, DPF, navigator
Part.
On the other hand, the present invention also provides a kind of driving method suitable for above-mentioned image element circuit, the image element circuit bag
Include：Light-emitting component and at least two groups of drive circuits, the driving method are：At least two groups of drive circuits take turns to operate driving
The light-emitting component.Drive circuit in off position, its corresponding driving tube are in threshold voltage recovering state, thus
Driving tube threshold voltage shift problem caused by working long hours can be effectively improved, so as to improve the display of display device effect
Fruit.
Specifically, for the image element circuit for being provided with two groups of drive circuits shown in Fig. 4, drive circuit provided by the invention
Take turns to operate the driving method of driving light-emitting component, it is specific as shown in fig. 6, including：
101st, in the first time period of N frames, the first scanning signal Vscan1 is high level, and the second scanning signal Vscan2 is
Low level, the switch transistor T 3 of the first drive circuit are opened, and data line signal line Vdata high level is written to node a, the section
Point a is the control pole of driving tube T4 in the first drive circuit so that the electric capacity C1 chargings and the first driving of the first drive circuit
The driving tube T4 of circuit is opened, and light-emitting component OLED starts to light, and now the switch transistor T 5 of the second drive circuit turns off, and coupling is single
First film transistor T1 in member is opened so that driving tube T6 control pole and low level signal line in the second drive circuit
Vss is connected, and node b is off state for the driving tube T6 of low level and the second drive circuit, and the node b is the second driving
Driving tube T6 control pole in circuit.
102nd, in the second time period of N frames, the first scanning signal Vscan1 and the second scanning signal Vscan2 are low electricity
It is flat, therefore switch transistor T 3 in first, second drive circuit, T5 are turned off, due to the electric charge of electric capacity C1 in the first drive circuit
Holding is acted on, and node a is still maintained high level, and the first film transistor T1 in coupling unit is continued on, and node b is still
For low level, the driving tube T6 of the second drive circuit keeps luminance still in off state, light-emitting component OLED；
103rd, in the first time period of N+1 frames, the first scanning signal Vscan1 is low level, the second scanning signal Vscan2
For high level, the switch transistor T 3 of the first drive circuit is turned off, and the switch transistor T 5 of the second drive circuit is opened, data line signal line
Vdata high level is written to node b so that the electric capacity C2 chargings of the second drive circuit and the driving tube of the second drive circuit
T6 is opened, and light-emitting component OLED starts to light, now, the first film transistor T1 shut-offs in coupling unit, the second film crystalline substance
Body pipe T2 is opened so that driving tube T4 control pole is connected with low level signal line in the first drive circuit, and node a is changed into low electricity
Flat and the first drive circuit driving tube T4 is off state；
104th, in the second time period of N+1 frames, the first scanning signal Vscan1 and the second scanning signal Vscan2 are low
Level, therefore the switch transistor T 3 of first, second drive circuit, T5 are turned off, due to the electric charge of electric capacity C2 in the second drive circuit
Holding is acted on, and node b is still maintained high level, and the second thin film transistor (TFT) T2 in coupling unit is continued on, and node a is still
For low level, the driving tube T4 of the first drive circuit keeps luminance still in off state, light-emitting component OLED, wherein, N
For non-zero natural number.
The driving method of image element circuit provided by the invention, the pixel electricity suitable for being provided with least two groups drive circuits
Road, each group drive circuit is set during work to take turns to operate driving light-emitting component, wherein the drive circuit in off position, it drives
Dynamic pipe is in threshold voltage recovering state, thus this kind of circuit design can be effectively improved driving tube caused by working long hours
Threshold voltage shift problem, so as to improve the display effect of display device.
Technical characteristic described in the embodiment of the present invention, in the case where not conflicting, it can arbitrarily be mutually combined use.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (8)
- A kind of 1. image element circuit, it is characterised in that including：One light-emitting component；At least two groups of drive circuits, drive circuit described in every group comprise at least：For the switching tube of control data signal input, use In the electric capacity of storage data-signal, and for driving the driving tube of the light-emitting component, wherein, the switch of each group drive circuit First pole of pipe is all connected to same data wire；The first of the driving tube of each group drive circuit extremely with the light-emitting component Two are extremely connected, and second is extremely connected with low level signal line；First pole of the light-emitting component is connected with operating voltage signal wire；Coupling unit, the light-emitting component is driven for ensuring that at least two groups of drive circuits take turns to operate；Wherein, the drive circuit is two groups, respectively the first drive circuit and the second drive circuit；The coupling unit bag Include：First film transistor, its control pole are connected to the control pole of driving tube in first drive circuit, its second pole with it is low Level signal line is connected, and its first pole is connected to the control pole of driving tube in second drive circuit；Second thin film transistor (TFT), Its control pole is connected to the control pole of driving tube in second drive circuit, and its second pole is connected with low level signal line, its First pole is connected to the control pole of driving tube in first drive circuit.
- 2. image element circuit according to claim 1, it is characterised in that for first drive circuit, its switching tube Control pole is connected to the first scan signal line, and the first pole of its switching tube is connected to data signal line, the second pole of its switching tube It is connected with the control pole of its driving tube, the first pole of its driving tube is extremely connected with the second of the light-emitting component, its driving tube Second pole is connected with low level signal line, and the both ends of its electric capacity are connected in parallel between the control pole of its driving tube and the second pole respectively, First pole of light-emitting component is connected with operating voltage signal wire；For second drive circuit, the control pole of its switching tube is connected to the second scan signal line, and the first of its switching tube Pole is connected to the data signal line, and the second pole of its switching tube is connected with the control pole of its driving tube, and the first of its driving tube Pole is extremely connected with the second of the light-emitting component, and the second pole of its driving tube is connected with low level signal line, the both ends of its electric capacity It is connected in parallel on respectively between the control pole of its driving tube and the second pole.
- 3. image element circuit according to claim 2, it is characterised in thatThe driving tube, the switching tube, the first film transistor and second thin film transistor (TFT) are N-type film crystalline substance Body pipe.
- 4. image element circuit according to claim 2, it is characterised in thatThe driving tube, the switching tube, the first film transistor and second thin film transistor (TFT) are that depletion type is thin Film transistor, or be reinforced membranes transistor.
- 5. image element circuit according to claim 1, it is characterised in thatThe light-emitting component is Organic Light Emitting Diode, wherein, the first extremely Organic Light Emitting Diode of the light-emitting component Anode, the negative electrode of the second extremely Organic Light Emitting Diode of the light-emitting component.
- 6. a kind of display device, it is characterised in that be provided with the image element circuit described in claim any one of 1-5.
- 7. the driving method of any one of a kind of claim 1-5 image element circuit, it is characterised in that the driving method is：At least two groups of drive circuits, which take turns to operate, drives the light-emitting component.
- 8. driving method according to claim 7, it is characterised in that at least two groups of drive circuits take turns to operate driving The light-emitting component, is specifically included：In the first time period of N frames, the first scanning signal is high level, and the second scanning signal is low level, the first drive circuit Switching tube open, it is driving tube in the first drive circuit that the high level of data line signal line, which is written to node a, the node a, Control pole so that the electric capacity charging of the first drive circuit and driving tube of the first drive circuit is opened, light-emitting component starts Luminous, now the switching tube of the second drive circuit is turned off, and the first film transistor in coupling unit is opened so that the second driving The control pole of driving tube is connected with low level signal line in circuit, and node b is at low level and the driving tube of the second drive circuit In off state, the node b is the control pole of driving tube in the second drive circuit,In the second time period of N frames, the first scanning signal and the second scanning signal are low level, therefore first, second drives Switching tube in circuit is turned off, and due to the electric charge holding effect of electric capacity in the first drive circuit, node a is still maintained high electricity Flat, the first film transistor in coupling unit continues on, and node b remains as low level, the driving tube of the second drive circuit Still in off state, light-emitting component keeps luminance；In the first time period of N+1 frames, the first scanning signal is low level, and the second scanning signal is high level, and the first driving is electric The switching tube shut-off on road, the switching tube of the second drive circuit are opened, and the high level of data line signal line is written to node b so that The electric capacity of second drive circuit is charged and the driving tube of the second drive circuit is opened, and light-emitting component starts to light, now, coupling First film transistor shut-off in unit, the second thin film transistor (TFT) are opened so that the control of driving tube in the first drive circuit Pole is connected with low level signal line, and node a is changed into low level and the driving tube of the first drive circuit is off state,In the second time period of N+1 frames, the first scanning signal and the second scanning signal are low level, therefore first, second drives The switching tube of dynamic circuit is turned off, and due to the electric charge holding effect of electric capacity in the second drive circuit, node b is still maintained high electricity Flat, the second thin film transistor (TFT) in coupling unit continues on, and node a remains as low level, the driving tube of the first drive circuit Still in off state, light-emitting component keeps luminance, wherein, N is non-zero natural number.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261475.6A CN104021763B (en) | 2014-06-11 | 2014-06-11 | The driving method of image element circuit, display device and image element circuit |
| PCT/CN2014/085833 WO2015188471A1 (en) | 2014-06-11 | 2014-09-03 | Pixel circuit, display device and method for driving pixel circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410261475.6A CN104021763B (en) | 2014-06-11 | 2014-06-11 | The driving method of image element circuit, display device and image element circuit |
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| CN104021763B true CN104021763B (en) | 2017-12-08 |
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| CN104732929A (en) * | 2015-04-16 | 2015-06-24 | 京东方科技集团股份有限公司 | Pixel circuit and driving method thereof and display device |
| CN105139805B (en) * | 2015-10-19 | 2017-09-22 | 京东方科技集团股份有限公司 | A kind of pixel-driving circuit and its driving method, display device |
| CN105761676B (en) * | 2016-05-11 | 2017-12-05 | 京东方科技集团股份有限公司 | Image element circuit, driving method, array base palte, display panel and display device |
| CN106097959A (en) * | 2016-06-02 | 2016-11-09 | 京东方科技集团股份有限公司 | Pixel cell and driving method, pixel-driving circuit and display device |
| CN107818759B (en) * | 2016-09-14 | 2023-09-19 | 合肥鑫晟光电科技有限公司 | Pixel driving circuit, pixel driving method, array substrate and display device |
| CN107731163B (en) | 2017-10-30 | 2019-10-18 | 合肥鑫晟光电科技有限公司 | Pixel-driving circuit and its driving method, display device |
| CN111354298A (en) * | 2018-12-05 | 2020-06-30 | 昆山工研院新型平板显示技术中心有限公司 | Pixel circuit, display device and driving method |
| CN109830212A (en) * | 2019-03-15 | 2019-05-31 | 深圳市华星光电半导体显示技术有限公司 | A kind of OLED display panel |
| CN110189691B (en) * | 2019-05-14 | 2021-03-16 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and display panel |
| CN110853592A (en) * | 2019-11-14 | 2020-02-28 | 深圳市华星光电半导体显示技术有限公司 | Driving circuit and driving method of display panel |
| CN113870767B (en) * | 2020-06-29 | 2023-02-07 | 京东方科技集团股份有限公司 | Pixel circuit, display substrate, display panel and display device |
| CN112365814B (en) * | 2020-11-20 | 2023-06-27 | 深圳Tcl新技术有限公司 | Display device, display control method, and computer-readable storage medium |
| CN113257196A (en) | 2021-05-14 | 2021-08-13 | Tcl华星光电技术有限公司 | Backlight driving circuit, control method thereof, display panel and electronic device |
| CN114944134B (en) * | 2022-05-12 | 2023-06-30 | 惠科股份有限公司 | Pixel driving circuit, method and display panel |
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| CN104021763A (en) | 2014-09-03 |
| WO2015188471A1 (en) | 2015-12-17 |
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