CN207217082U - Image element circuit and display device - Google Patents

Image element circuit and display device Download PDF

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Publication number
CN207217082U
CN207217082U CN201721290762.5U CN201721290762U CN207217082U CN 207217082 U CN207217082 U CN 207217082U CN 201721290762 U CN201721290762 U CN 201721290762U CN 207217082 U CN207217082 U CN 207217082U
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circuit
signal
transistor
image element
reset
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高雪岭
彭宽军
羊振中
邹祥祥
秦纬
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Abstract

A kind of image element circuit and display device.The image element circuit includes drive circuit, data write circuit, compensation circuit, the first reset circuit, the first emission control circuit and light-emitting component.The drive circuit includes control terminal, first end and the second end, and is configured to control and flows through first end and the driving current for being used to drive light-emitting component luminous at the second end；Data write circuit is configured to the control terminal of data-signal write driver circuit in response to scanning signal；Compensation circuit is configured to the data-signal of storage write-in and drive circuit is compensated in response to scanning signal；First reset circuit is configured to apply resetting voltage to the control terminal of drive circuit in response to the first reset signal；First emission control circuit is configured to apply first voltage to the first end of drive circuit in response to the first LED control signal.The image element circuit can improve short-term image retention problem.

Description

Image element circuit and display device
Technical field
The utility model embodiment is related to a kind of image element circuit and display device
Background technology
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) display device is due to visual angle Wide, contrast height, fast response time and the luminosity higher compared to inorganic light emitting displays part, lower driving voltage Gradually got more and more people's extensive concerning etc. advantage.Due to These characteristics, Organic Light Emitting Diode (OLED) goes for hand Machine, display, notebook computer, digital camera, instrument and meter etc. have the device of display function.
Whether the image element circuit in OLED display typically uses matrix driving mode, draw according in each pixel cell Enter switching component and be divided into active matrix (Active Matrix, AM) driving and passive matrix (Passive Matrix, PM) drive It is dynamic.Although PMOLED techniques are simple, cost is relatively low, because the shortcomings of cross-talk, high power consumption, low life-span be present, it is impossible to meet The demand that high Resolution and Large Size is shown.By contrast, AMOLED is integrated with one group in the image element circuit of each pixel Thin film transistor (TFT) and storage capacitance, by the drive control to thin film transistor (TFT) and storage capacitance, realize the electricity to flowing through OLED The control of stream, so that OLED lights as needed.Compared to PMOLED, driving current needed for AMOLED is small, the low in energy consumption, life-span more It is long, it can meet that the large scale of the more gray scales of high-resolution shows demand.Meanwhile AMOLED is in visible angle, the reduction of color, work( Consumption and response time etc. have obvious advantage, suitable for high information content, high-resolution display device.
Utility model content
The embodiment of the present disclosure provides a kind of image element circuit and display device, can make driving transistor in initial phase In VGSFor the ON state state of fixed bias, such as data write-in and compensated stage are then initially entered, it is aobvious so as to improve Showing device is due to the issuable short-term image retention problem of hesitation.
A disclosure at least embodiment provides a kind of image element circuit, including drive circuit, data write circuit, compensation electricity Road, the first reset circuit, the first emission control circuit and light-emitting component.The drive circuit includes control terminal, first end and the Two ends, and it is configured to the driving electricity for being used to drive the light-emitting component luminous that control flows through the first end and second end Stream；The data write circuit is configured to write data-signal in response to scanning signal the control terminal of the drive circuit；Institute Compensation circuit is stated to be configured to the data-signal of storage write-in and carry out the drive circuit in response to the scanning signal Compensation；First reset circuit is configured to apply resetting voltage to the control of the drive circuit in response to the first reset signal End processed；First emission control circuit is configured to apply first voltage to the driving in response to the first LED control signal The first end of circuit.
For example, in the image element circuit that the embodiment of the disclosure one provides, first reset signal and described first lights It is simultaneously open signal in control signal at least part period.
For example, the embodiment of the disclosure one provide image element circuit also include the second emission control circuit, be configured in response to Second LED control signal, which applies the driving current to the light-emitting component, second LED control signal, is different from institute State the first LED control signal.
For example, the image element circuit that the embodiment of the disclosure one provides also includes the second reset circuit, it is configured in response to second Reset signal applies the resetting voltage to the second end of the drive circuit, and second reset signal is different from described the One reset signal.
For example, in the image element circuit that the embodiment of the disclosure one provides, the drive circuit includes the first transistor；It is described The grid of the first transistor connects as the control terminal of the drive circuit with first node, the first pole of the first transistor First end as the drive circuit connects with section point, and the second pole of the first transistor is as the drive circuit The second end connected with the 3rd node.
For example, in the image element circuit that the embodiment of the disclosure one provides, the data write circuit includes second transistor； The gate configuration of the second transistor is to be connected with scanning signal end to receive the scanning signal, the second transistor First pole is configured to connect with data signal end to receive the data-signal, the second pole of the second transistor and described the Two nodes connect.
For example, in the image element circuit that the embodiment of the disclosure one provides, the compensation circuit includes third transistor and deposited Storing up electricity is held；The gate configuration of the third transistor is connects to receive the scanning signal with scanning signal end, and the described 3rd First pole of transistor connects with the 3rd node, the second pole of the third transistor and the first pole of the storage capacitance Connection, the second pole of the storage capacitance is configured to connect with first voltage end.
For example, in the image element circuit that the embodiment of the disclosure one provides, first reset circuit includes the 4th transistor； The gate configuration of 4th transistor is connects to receive first reset signal with the first reseting controling end, and the described 4th First pole of transistor connects with first node, and the second pole of the 4th transistor is configured to connect to connect with resetting voltage end Receive the resetting voltage.
For example, in the image element circuit that the embodiment of the disclosure one provides, it is brilliant that first emission control circuit includes the 5th Body pipe；The gate configuration of 5th transistor is believed to be connected with the first light emitting control end with receiving first light emitting control Number, the first pole of the 5th transistor is configured to connect with first voltage end to receive the first voltage, and the described 5th is brilliant Second pole of body pipe connects with section point.
For example, in the image element circuit that the embodiment of the disclosure one provides, it is brilliant that second emission control circuit includes the 6th Body pipe；The gate configuration of 6th transistor is believed to be connected with the second light emitting control end with receiving second light emitting control Number, the first pole of the 6th transistor connects with the 3rd node, the second pole of the 6th transistor and fourth node Connection；First pole of the light-emitting component is configured to connect with the fourth node, and the second pole of the light-emitting component is configured to Connected with second voltage end to receive second voltage.
For example, in the image element circuit that the embodiment of the disclosure one provides, second reset circuit includes the 7th transistor； The gate configuration of 7th transistor is connects to receive second reset signal with the second reseting controling end, and the described 7th First pole of transistor connects with the fourth node, and the second pole of the 7th transistor is configured to connect with resetting voltage end To receive the resetting voltage.
For example, in the image element circuit that the embodiment of the disclosure one provides, first LED control signal and described second It is simultaneously open signal in LED control signal at least part period.
A disclosure at least embodiment also provides a kind of display device, including multiple pixel cells, more in array distribution Bar scan signal line, a plurality of data signal line and a plurality of light emitting control line, each pixel cell include the implementation of the disclosure The image element circuit that example provides.The scan signal line of Nth row and data write circuit and compensation circuit in the image element circuit of Nth row Connect to provide the scanning signal；The data signal line of m column connects with the data write circuit in the image element circuit of m column To provide the data-signal；The scan signal line of N-1 rows connects with the first reset circuit in the image element circuit of Nth row, The scanning signal inputted on the scan signal line of the N-1 rows is provided to described first as first reset signal to be resetted Circuit；The light emitting control line of N+1 rows is connected with the first emission control circuit in the image element circuit of Nth row to provide described One LED control signal；N is the integer more than 1, and M is the integer more than 0.
For example, in the display device that the embodiment of the disclosure one provides, the image element circuit also includes：Second light emitting control Circuit, it is configured to apply the driving current to the light-emitting component, second hair in response to the second LED control signal Optical control signal is different from first LED control signal；And second reset circuit, it is configured to reset letter in response to second Number the resetting voltage is applied to the second end of the drive circuit and the compensation circuit, second reset signal is not It is same as first reset signal.The second emission control circuit in the light emitting control line of Nth row and the image element circuit of Nth row connects Connect to provide second LED control signal；Second in the scan signal line of N+1 rows and the image element circuit of Nth row resets Circuit is connected, and the scanning signal inputted on the scan signal line of the N+1 rows is provided to institute as second reset signal State the second reset circuit.
A disclosure at least embodiment also provides a kind of display device, including multiple pixel cells, more in array distribution Bar scan signal line, a plurality of data signal line, a plurality of reset control line and a plurality of light emitting control line, each pixel cell bag The image element circuit of embodiment of the disclosure offer is provided.Data write-in in the scan signal line of Nth row and the image element circuit of Nth row Circuit is connected with compensation circuit to provide the scanning signal；Number in the data signal line of m column and the image element circuit of m column Connected according to write circuit to provide the data-signal；First in the image element circuit for resetting control line and Nth row of Nth row is multiple Position circuit is connected to provide first reset signal；First in the light emitting control line of N+1 rows and the image element circuit of Nth row Emission control circuit is connected to provide first LED control signal；N and M is the integer more than 0.
For example, in the display device that the embodiment of the disclosure one provides, the image element circuit also includes：Second light emitting control Circuit, it is configured to apply the driving current to the light-emitting component, second hair in response to the second LED control signal Optical control signal is different from first LED control signal；And second reset circuit, it is configured to reset letter in response to second Number the resetting voltage is applied to the second end of the drive circuit and the compensation circuit, second reset signal is not It is same as first reset signal.The second emission control circuit in the light emitting control line of Nth row and the image element circuit of Nth row connects Connect to provide second LED control signal；Second in the image element circuit for resetting control line and Nth row of N+1 rows resets Circuit is connected to provide second reset signal.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the embodiment of the present disclosure, the accompanying drawing of embodiment will be simply situated between below Continue, it should be apparent that, drawings in the following description merely relate to some embodiments of the present disclosure, rather than the limitation to the disclosure.
Figure 1A is the schematic diagram for the image one that a display device is shown；
Figure 1B is the schematic diagram of the display device image two to be shown；
Fig. 1 C are the schematic diagram of the image two of a display device actual displayed；
Fig. 2 is a kind of schematic block diagram for image element circuit that the embodiment of the disclosure one provides；
Fig. 3 is a kind of circuit diagram of specific implementation example of the image element circuit shown in Fig. 2；
Fig. 4 is signal timing diagram when being worked corresponding to the image element circuit shown in Fig. 3；
Fig. 5 to Fig. 8 is respectively that the image element circuit shown in Fig. 3 shows corresponding to the circuit in four signal sequence stages in Fig. 4 It is intended to；
Fig. 9 is the circuit diagram for another image element circuit that the embodiment of the disclosure one provides；
Figure 10 is a kind of schematic diagram for display device that the embodiment of the disclosure one provides；And
Figure 11 is the schematic diagram for another display device that the embodiment of the disclosure one provides.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present disclosure clearer, below in conjunction with the embodiment of the present disclosure Accompanying drawing, the technical scheme of the embodiment of the present disclosure is clearly and completely described.Obviously, described embodiment is this public affairs The part of the embodiment opened, rather than whole embodiments.Based on described embodiment of the disclosure, ordinary skill The every other embodiment that personnel are obtained on the premise of without creative work, belong to the scope of disclosure protection.
Unless otherwise defined, the technical term or scientific terminology that the disclosure uses, which are should be in disclosure art, to be had The ordinary meaning that the personage for having general technical ability is understood." first ", " second " and the similar word used in the disclosure is simultaneously Any order, quantity or importance are not indicated that, and is used only to distinguish different parts.Equally, "one", " one " or The similar word such as person's "the" does not indicate that quantity limits yet, but represents to exist at least one." comprising " or "comprising" etc. are similar Word mean to occur element before the word either object cover the element for appearing in the word presented hereinafter or object and its It is equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " be not limited to physics or The connection of person's machinery, but electrical connection can be included, it is either directly or indirect." on ", " under ", " left side ", " right side " etc. is only used for representing relative position relation, after the absolute position for being described object changes, then the relative position relation May correspondingly it change.
Due to the hesitation of driving transistor, after a display device shows same image for a period of time, work as in handle When preceding display image is switched to next image, original image can partly be remained and emerged in next image, Ran Houyi Image retention can disappear after the section time, and this phenomenon is referred to as short-term image retention.What hesitation was primarily due to remain in hole may move Caused by threshold voltage caused by ion (Vth) skew, the V of its initial phase when different pictures switchGS(driving crystal Voltage between the grid and source electrode of pipe) may be different, it is possible that the different degrees of threshold voltage of driving transistor can be caused Skew, so as to cause short-term image retention.
For example, Figure 1A is the schematic diagram for the image one that a display device is shown, Figure 1B is the display device figure to be shown As two schematic diagram, Fig. 1 C are the schematic diagram of the image two of the display device actual displayed.In the display device display image one Such as black and white checkerboard image as shown in Figure 1A for a period of time after, when the image that display device is shown is switched to new image two When GTG such as shown in Figure 1B is 48 image, the checkerboard image of image one shown in Figure 1A still can be partly remained, such as Fig. 1 C It is shown.
A disclosure at least embodiment provides a kind of image element circuit.The image element circuit includes drive circuit, data write-in electricity Road, compensation circuit, the first reset circuit, the first emission control circuit and light-emitting component.Drive circuit includes control terminal, first end With the second end, and the driving current for being used to drive light-emitting component luminous that control flows through first end and the second end is configured to；Data Write circuit is configured to the control terminal of data-signal write driver circuit in response to scanning signal；Compensation circuit is configured to store The data-signal of write-in and drive circuit is compensated in response to scanning signal；First reset circuit is configured in response to first Reset signal applies resetting voltage to the control terminal of drive circuit；First emission control circuit is configured to luminous in response to first Control signal applies first voltage to the first end of drive circuit.
The image element circuit and its driving method, display device that the embodiment of the present disclosure provides, can make driving transistor first Stage beginning is in VGSFor the ON state state of fixed bias, such as data write-in and compensated stage are then initially entered, so as to To improve due to the issuable short-term image retention problem of hesitation.
One example of the embodiment of the present disclosure provides a kind of image element circuit 10, and the image element circuit 10 for example can be used for OLED The sub-pixel of display device.As shown in Fig. 2 the image element circuit 10 includes drive circuit 100, data write circuit 200, compensation electricity Road 300, the first reset circuit 400, the first emission control circuit 500 and light-emitting component 600.For example, drive circuit 100 includes control End 110 processed, first end 120, the second end 130, its with data write circuit 200, compensation circuit 300, the first reset circuit 400 with And first emission control circuit 50 connect, and be configured to that control flows through the end 130 of first end 120 and second is used to drive luminous member The luminous driving current of part 600.For example, in glow phase, drive circuit 100 can provide driving current to light-emitting component 600 To drive light-emitting component 600 to be lighted, and " gray scale " that can be as needed be luminous.For example, light-emitting component 600 can use OLED, embodiment of the disclosure include but is not limited to this.
For example, data write circuit 200 is connected with the emission control circuit 500 of drive circuit 100 and first, and it is configured to In response to scanning signal GATE by the control terminal 110 of data-signal DATA write driver circuits 100.For example, data write-in and Compensated stage, data write circuit 200 are opened in response to scanning signal GATE, so as to which data-signal DATA write drivers is electric The control terminal 110 on road 100, and be stored in compensation circuit 300, to be given birth in such as glow phase according to data-signal DATA The driving current luminous into driving light-emitting component 600.
For example, compensation circuit 300 is connected with the reset circuit 400 of drive circuit 100 and first, and it is configured to storage write-in Data-signal DATA, and drive circuit 100 is compensated in response to scanning signal GATE.For example, wrapped in compensation circuit 300 In the case of including storage capacitance, such as can be in response to scanning signal GATE in data write-in and compensated stage, compensation circuit 300 And open, it is stored in so as to write data into the data-signal DATA of the write-in of circuit 200 in storage capacitance.For example, simultaneously The end 130 of control terminal 110 and second of drive circuit 100 can be electrically connected in data write-in and compensated stage, compensation circuit 300 Connect, so as to so that the relevant information of the threshold voltage of drive circuit 100 also respectively, may be stored in storage capacitance, so as to for example Being controlled including data-signal DATA and threshold voltage to drive circuit 100 for storage can be utilized in glow phase, is made Drive circuit 100 is obtained to be compensated.
For example, the first reset circuit 400 is connected with drive circuit 100 and compensation circuit 300, and it is configured in response to One reset signal RST1 applies resetting voltage VINT to the control terminal 110 of drive circuit 100.For example, in initial phase, One reset circuit 400 can be opened in response to the first reset signal RST1, so as to which resetting voltage VINT is applied to drive The control terminal 110 of dynamic circuit.
For example, the first emission control circuit 500 is connected with drive circuit 100 and data write circuit 200, and it is configured to First voltage VDD is applied to the first end 120 of drive circuit 100 in response to the first LED control signal EM1.For example, first Stage beginning, the first emission control circuit 500 can be opened in response to the first LED control signal EM1, so as to by One voltage VDD applies to the first end 120 of drive circuit 100.In another example in glow phase, the first emission control circuit 500 It can be opened in response to the first LED control signal EM1, so as to which first voltage VDD is applied to drive circuit 100 First end 120, when drive circuit 100 turns on, it is readily appreciated that, the current potential at its second end 130 is also VDD.Then, drive circuit 100 apply this first voltage VDD to light-emitting component 600 to provide driving voltage, so as to drive light-emitting component to light.For example, First voltage VDD can be driving voltage, such as high voltage.
When drive circuit 100 is embodied as the situation of driving transistor, such as the grid of driving transistor can be used as drive The control terminal of dynamic circuit 100, the first pole (such as source electrode) can be as the first ends of drive circuit 100, and the second pole (such as is leaked Pole) can be as the second end of drive circuit 100.
For example, it is simultaneously unlatching in the first reset signal RST1 and first LED control signal EM1 at least part periods Signal.For example, above-mentioned image element circuit 10 can be made to make the first reset signal RST1 and the first light emitting control in initial phase Signal EM1 is open signal simultaneously, so as to which resetting voltage VINT is applied to the grid of driving transistor, while by first Voltage VDD applies to the source electrode of driving transistor, so as to so that the grid of driving transistor and the voltage V of source electrodeGSMeet：| VGS|>| Vth | (Vth is the threshold voltage of driving transistor, such as when driving transistor is P-type transistor, Vth is negative value), So that driving transistor is in VGSFor the ON state state of fixed bias.Using this configuration mode, it is possible to achieve no matter previous The data-signal DATA of frame is that black state or white state signal, driving transistor all initially enter example by the ON state state of fixed bias As data write-in and compensated stage, so as to improve using above-mentioned image element circuit display device due to hesitation may Caused short-term image retention problem.
For example, as shown in Fig. 2 in another example of the present embodiment, it is luminous that image element circuit 10 can also include second Control circuit 700, it is connected with drive circuit 100, compensation circuit 300 and light-emitting component 600, and is configured in response to second LED control signal EM2 applies driving current to light-emitting component 600.
For example, in glow phase, the second emission control circuit 700 is opened in response to the second LED control signal EM2, from And drive circuit 100 can be applied driving current to light-emitting component 600 so that it is sent out by the second emission control circuit 700 Light；And end in non-luminescent stage, the second emission control circuit 700 in response to the second LED control signal EM2, so as to avoid Light-emitting component 600 is luminous, can provide the contrast of corresponding display device.In another example in some instances, resetting rank Section, the second emission control circuit 700 can also be opened in response to the second LED control signal EM2, so as to reference to other Reset circuit to drive circuit 100 and light-emitting component 600 to carry out reset operation.
For example, the second LED control signal EM2 is different from the first LED control signal EM1, such as the two may be coupled to Different signal output parts, for example the second LED control signal EM2 can be individually set to believe to open in reseting stage as described above Number.For example, be simultaneously open signal in the first LED control signal and second LED control signal at least part period, such as In glow phase, the first LED control signal EM1 and the second LED control signal EM2 can be made while it is open signal, so that It is luminous to obtain light-emitting component 600.
It should be noted that the luminous controls of the first LED control signal EM1 and second described in embodiment of the disclosure Signal EM2 processed is to distinguish two different LED control signals of sequential.For example, in a display device, when pixel electricity When road 10 is arranged in array, the first LED control signal EM1 can be the first light emitting control in control one's own profession image element circuit 10 The control signal of circuit 500, meanwhile, the first LED control signal EM1 also controls second in next line image element circuit 10 to light Control circuit 700；Likewise, the second LED control signal EM2 is the second light emitting control electricity in control one's own profession image element circuit 10 The control signal on road 700, meanwhile, the second LED control signal EM2 also controls the in lastrow image element circuit 10 first luminous control Circuit 500 processed.
For example, as shown in Fig. 2 in another example of the present embodiment, image element circuit 10 can also include second and reset Circuit 800, it is connected with the second emission control circuit 700 and light-emitting component 600, and is configured in response to the second reset signal RST2 applies resetting voltage (such as being similarly VINT) to the second end 130 of drive circuit 100.
For example, in reseting stage, the second reset circuit 800 can be opened in response to the second reset signal RST2, as above It is described to be opened simultaneously in this second emission control circuit of stage 700, so as to which resetting voltage VINT is applied to drive Second end 130 of dynamic circuit 100, reset operation to realize.
For example, the second reset signal RST2 is different from the first reset signal RST1, the two may be coupled to different signals Output end.For example, the first reset signal RST1 and the second reset signal RST2 can be respectively configured as by two different resets Control line provides respectively.In another example in a display device, when image element circuit 10 is arranged in array, the first reset signal RST1 can be provided by the scan signal line of lastrow, and the second reset signal RST2 can be carried by the scan signal line of next line For.
For example, the image element circuit 10 shown in Fig. 2 can be implemented as the image element circuit structure shown in Fig. 3.Such as Fig. 3 institutes Show, the image element circuit 10 includes：First to the 7th transistor T1, T2, T3, T4, T5, T6, T7 and including storage capacitance C1 and Light-emitting component D1.For example, the first transistor T1 is used as driving transistor, other second to the 7th transistors are used as switching Transistor.For example, light-emitting component D1 can use OLED, embodiment of the disclosure includes but is not limited to this, following embodiment Illustrate, repeat no more by taking OLED as an example.The OLED can be all kinds, such as top emitting, bottom emitting etc., Ke Yifa Feux rouges, green glow, blue light or white light etc., embodiment of the disclosure is not restricted to this.
For example, as shown in figure 3, in more detail, drive circuit 100 can be implemented as the first transistor T1.The first transistor T1 grid connects as the control terminal 110 of drive circuit 100 with first node N1, and the first transistor T1 the first pole is as drive The first end 120 of dynamic circuit 100 connects with section point N2, the first transistor T1 the second pole as drive circuit 100 the Two ends 130 connect with the 3rd node N3.
Data write circuit 200 can be implemented as second transistor T2.Second transistor T2 gate configuration is and scanned Signal end is connected to receive scanning signal GATE, and second transistor T2 the first pole is configured to connect to receive with data signal end Data-signal DATA, second transistor T2 the second pole are connected with section point N2.
Compensation circuit 300 can be implemented as including third transistor T3 and storage capacitance C1.Third transistor T3 grid It is configured to connect with scanning signal end to receive scanning signal GATE, third transistor T3 the first pole and the 3rd node N3 connect Connecing, third transistor T3 the second pole connects (first node N1) with storage capacitance C1 the first pole, and the second of storage capacitance C1 Pole is configured to connect with first voltage end to receive first voltage VDD.
First reset circuit 400 can be implemented as the 4th transistor T4.The gate configuration of 4th transistor is and first is multiple Position control terminal connection is to receive the first reset signal RST1, and the first pole of the 4th transistor connects with first node, the 4th crystal Second pole of pipe is configured to connect with resetting voltage end to receive resetting voltage VINT.
First emission control circuit 500 can be implemented as the 5th transistor T5.5th transistor T5 gate configuration be and First light emitting control end is connected to receive the first LED control signal EM1, and the 5th transistor T5 the first pole is configured to and first Voltage end is connected to receive first voltage VDD, and the 5th transistor T5 the second pole connects with section point N2.
Second emission control circuit 700 can be implemented as the 6th transistor T6.6th transistor T6 gate configuration be and Second light emitting control end is connected to receive the second LED control signal EM2, the 6th transistor T6 the first pole and the 3rd node N3 Connection, the 6th transistor T6 the second pole connects with fourth node N4.
Light-emitting component D1 the first pole (anode) is configured to connect with fourth node N4, and light-emitting component D1 the second pole is (cloudy Pole) it is configured to second voltage end to receive second voltage VSS.Such as second voltage end can be grounded, i.e. VSS can be 0V.
Second reset circuit 800 can be implemented as the 7th transistor T7.7th transistor T7 gate configuration be and second Reseting controling end is connected to receive the second reset signal RST2, and the first pole of the 7th transistor connects with fourth node N4, and the 7th Second pole of transistor is configured to connect with resetting voltage end to receive resetting voltage VINT.For example, resetting voltage VINT can be with For 0V (can also be other low level signals etc.).
It should be noted that the transistor used in embodiment of the disclosure can be brilliant for thin film transistor (TFT) or field-effect Body pipe or other characteristic identical switching devices, illustrated by taking thin film transistor (TFT) as an example in embodiment of the disclosure.Here The source electrode of the transistor of use, drain electrode can be symmetrical in structure, so its source electrode, drain electrode can not have in structure Difference.In embodiment of the disclosure, in order to distinguish the two poles of the earth of transistor in addition to grid, wherein one is directly described extremely First pole, another extremely the second pole.
In addition, it is necessary to explanation, the transistor in image element circuit 10 shown in Fig. 3 is by taking P-type transistor as an example Illustrate, now, first extremely can be source electrode, and second extremely can be drain electrode.As shown in figure 3, in the image element circuit 10 Light-emitting component D1 negative electrode is connected with second voltage end to receive second voltage VSS.For example, in a display device, work as Fig. 3 Shown in image element circuit 10 when being arranged in array, light-emitting component D1 negative electrode may be electrically connected to same voltage end, that is, adopt With common cathode connected mode.
The configuration mode that embodiment of the disclosure includes but is not limited in Fig. 3, such as shown in figure 9, in the another of the disclosure In one embodiment, the transistor in image element circuit 10 can also all use N-type transistor, and now first extremely can be drain electrode, Second extremely can be source electrode.In the present embodiment, the anode of the light-emitting component D1 in the image element circuit 10 and first voltage end connect Connect to receive first voltage VDD.For example, in a display device, the image element circuit 10 shown in Fig. 9 is arranged in array When, light-emitting component D1 anode may be electrically connected to same voltage end (such as common voltage terminal), i.e., is connected using common-anode Mode.Annexation on other transistors in the present embodiment repeats no more here with reference to shown in figure 9.
In another example the transistor in the image element circuit that embodiment of the disclosure provides can also be mixed using P-type transistor And N-type transistor, only need the port polarity of the transistor of selection type simultaneously according to the corresponding crystalline substance in embodiment of the disclosure The port polarity of body pipe accordingly connects.
With reference to the signal timing diagram shown in Fig. 4, the operation principle of the image element circuit 10 shown in Fig. 3 is illustrated. As shown in figure 4, including four-stage, respectively initial phase 1, data write-in and compensated stage 2, reseting stage 3 and hair Photophase 4, the timing waveform of each signal in each stage is shown in figure.
It should be noted that the schematic diagram that Fig. 5 is image element circuit 10 shown in Fig. 3 when being in initial phase 1, Fig. 6 Schematic diagram when data write-in and compensated stage 2 is in for the image element circuit 10 shown in Fig. 3, Fig. 7 is the pixel shown in Fig. 3 Circuit 10 is in schematic diagram during reseting stage 3, and Fig. 8 is in signal during glow phase 4 for the image element circuit 10 shown in Fig. 3 Figure.Other Fig. 5 is represented to be in cut-off state within the corresponding stage into Fig. 8 with the transistor of broken line representation.Fig. 5 is into Fig. 8 By taking P-type transistor as an example, i.e., the grid of each transistor turns on shown transistor when accessing low level, and high in access End during level.
In initial phase 1, the first reset signal RST1 is inputted, the first reset circuit 400 is opened, by resetting voltage VINT Apply to the control terminal 110 of drive circuit 100；The first LED control signal EM1 is inputted, opens the first emission control circuit 500, First voltage VDD is applied to the first end 120 of drive circuit 100.
As shown in Figure 4 and Figure 5, led in initial phase 1, the 4th transistor T4 by the first reset signal RST1 low level Logical, the 5th transistor T5 is turned on by the first LED control signal EM1 low level；Meanwhile second transistor T2, third transistor The high level signal cut-off that T3, the 6th transistor T6 and the 7th transistor T7 are each accessed.
In initial phase 1, because the 4th transistor T4 is turned on, can by resetting voltage VINT (low level signal, such as Can be grounded or be other low level signals) apply to the first transistor T1 grid.Simultaneously as the 5th transistor T5 is led It is logical, first voltage VDD (high level signal) can be applied to the first transistor T1 source electrode, so as to which the can be made in this stage One transistor T1 grid and the voltage V of source electrodeGSMeet：|VGS|>| Vth | (Vth be the first transistor T1 threshold voltage, example Such as when the first transistor T1 is P-type transistor, Vth is negative value) so that the first transistor T1 is in VGSFor fixed bias ON state state.Using this configuration mode, it is possible to achieve no matter the data-signal DATA of former frame is black state or white state signal, The first transistor T1 initially enters data write-in and compensated stage 2 by the ON state state of fixed bias, is adopted so as to improve With the display device of image element circuit 10 due to the issuable short-term image retention problem of hesitation.
In data write-in and compensated stage 2, scanning signal GATE and data-signal DATA, turn-on data write circuit are inputted 200th, drive circuit 100 and compensation circuit 300, data write circuit 200 mend data-signal DATA write driver circuits 100 Circuit 300 is repaid to compensate drive circuit 100.
As shown in Figure 4 and Figure 6, in data write-in and compensated stage 2, second transistor T2 and third transistor T3 are scanned Signal GATE low level conducting.Meanwhile the 4th transistor T4, the 5th transistor T5, the 6th transistor T6 and the 7th transistor The high level signal cut-off that T7 is each accessed.
As shown in fig. 6, in data write-in and compensated stage 2, data-signal DATA is by second transistor T2, first crystal First node N1 is charged after pipe T1 and third transistor T3 and (storage capacitance C1 charged), that is to say, that first node N1 current potential becomes big.Be readily appreciated that, section point N2 current potential remains Vdata, while according to the first transistor T1 itself Characteristic, when first node N1 current potential increases to Vdata+Vth, the first transistor T1 cut-offs, charging process terminates.Need Bright, Vdata represents data-signal DATA magnitude of voltage, and Vth represents the threshold voltage of the first transistor, due in this implementation In example, the first transistor T1 just illustrates by taking P-type transistor as an example, so threshold voltage vt h can be a negative value herein.
After data write-in and compensated stage 2, first node N1 and the 3rd node N3 current potential are Vdata+Vth, That is the information of voltage with data-signal DATA and threshold voltage vt h has been stored in storage capacitance C1, for Subsequently in glow phase, there is provided the gray scale display data and threshold voltage of itself compensates to the first transistor T1.
In reseting stage 3, the second LED control signal EM2 and the second reset signal RST2 is inputted, opens the second luminous control The reset circuit 800 of circuit 700 and second processed, resets to drive circuit 100, compensation circuit 300 and light-emitting component 600.
As shown in figs. 4 and 7, in reseting stage 3, the 6th transistor T6 is by the second LED control signal EM2 low level Conducting, the 7th transistor T7 are turned on by the second reset signal RST2 low level；Meanwhile second transistor T2, third transistor The high level cut-off that T3, the 4th transistor T4 and the 5th transistor T5 are each accessed.
As shown in fig. 7, in reseting stage 3, because resetting voltage VINT is that low level signal (such as can be grounded or be it His low level signal), the first transistor T1 drain electrode is discharged by the 6th transistor T6 and the 7th transistor T7, so as to by the 3rd Node N3 and fourth node N4 current potential reset simultaneously.
In reseting stage 3, the first transistor T1 drain electrode is reset, so as to keep it in a fixed electricity Position, without because the display effect that is uncertain and influenceing the display device using above-mentioned image element circuit of drain potential.Meanwhile Fourth node N4 is also reset, i.e., resets OLED, so as to so that OLED is shown as black state before glow phase 4 does not send out Light, improve using display effects such as the contrasts of display device of above-mentioned image element circuit.
In glow phase 4, the first LED control signal EM1 and the second LED control signal EM2 is inputted, it is luminous to open first Control circuit 500, the second emission control circuit 700 and drive circuit 100, the second emission control circuit 700 apply driving current Light-emitting component 600 is added to so that it is luminous.
As shown in Figure 4 and Figure 8, in glow phase 4, the 5th transistor T5 is by the first LED control signal EM1 low level Conducting, the 6th transistor T6 are turned on by the second LED control signal EM2 low level；Second transistor T2, third transistor T3, High level that 4th transistor T4 and the 7th transistor T7 are each accessed and by；Meanwhile first node N1 current potential Vdata + Vth, section point N2 current potential are VDD, so being also held in this stage the first transistor T1.
As shown in figure 8, in glow phase 4, light-emitting component D1 anode and negative electrode have been respectively connected to first voltage VDD (height Pressure) and second voltage VSS (low pressure), so as to be lighted in the presence of the first transistor T1 driving current is flowed through.
Specifically, light-emitting component D1 driving current I is flowed throughD1Value can be drawn according to following formula：
ID1=K (VGS-Vth)2
=K [(Vdata+Vth-VDD)-Vth]2
=K (Vdata-VDD)2
In above-mentioned formula, Vth represents the first transistor T1 threshold voltage, VGSRepresent the first transistor T1 grid and Voltage between source electrode, K are a constant value.From above-mentioned formula as can be seen that flowing through light-emitting component D1 driving current ID1No longer It is relevant with the first transistor T1 threshold voltage vt h, and only with the data-signal DATA's of the luminous gray scale of the control image element circuit Voltage Vdata is relevant, it is possible thereby to realize the compensation to the image element circuit, solves driving transistor (in the implementation of the disclosure Example in be the first transistor T1) due to manufacturing process and for a long time operate cause threshold voltage shift the problem of, it is right to eliminate its Driving current ID1Influence, so as to improve display effect.
An at least embodiment for the disclosure also provides a kind of display device 1, and as shown in Figure 10, the display device 1 includes：It is in Multiple pixel cells 40, multi-strip scanning signal wire, a plurality of data signal line and a plurality of light emitting control line of array distribution.Need It is bright, pixel cell 40, scan signal line, data signal line and the light emitting control line of part are illustrate only in Fig. 10, this Disclosed embodiment includes but is not limited to this.For example, GN-1Represent the scan signal line of N-1 rows, GNRepresent the scanning of Nth row Signal wire, GN+1Represent the scan signal line of N+1 rows；EN-1Represent the light emitting control line of N-1 rows, ENRepresent the hair of Nth row Photocontrol line, EN+1Represent the light emitting control line of N+1 rows；DMRepresent the data signal line of m column, DM+1Represent M+1 row Data signal line.Here, N is, for example, the integer more than 1, and M is, for example, the integer more than 0.
For example, each pixel cell 40 can include any pixel circuit 10 provided in above-described embodiment, such as including Image element circuit 10 shown in Fig. 3.
For example, the scan signal line G of Nth rowNWith the data write circuit and compensation circuit in the image element circuit 10 of Nth row Connect to provide scanning signal GATE；The data signal line D of m columnMWith the data write circuit in the image element circuit 10 of m column Connect to provide data-signal DATA；The scan signal line G of N-1 rowsN-1Resetted with first in the image element circuit 10 of Nth row Circuit connects, the scan signal line G of N-1 rowsN-1The scanning signal of upper input is provided to first as the first reset signal RST1 Reset circuit；The light emitting control line E of N+1 rowsN+1Connected with the first emission control circuit in the image element circuit 10 of Nth row with First LED control signal EM1 is provided.
For example, in the case of image element circuit 10 includes the second emission control circuit and the second reset circuit, the hair of Nth row Photocontrol line ENConnected with the second emission control circuit in the image element circuit 10 of Nth row to provide the second LED control signal EM2；The scan signal line G of N+1 rowsN+1Connected with the second reset circuit in the image element circuit 10 of Nth row, N+1 rows are swept Retouch signal wire GN+1The scanning signal of upper input is provided to the second reset circuit as the second reset signal RST2.
As described above, in the display device 1 that the present embodiment provides, the image element circuit 10 per a line with one's own profession except sweeping It is outer to retouch signal wire connection, is also connected with the scan signal line of adjacent lastrow, so as to which the scan signal line of lastrow above be carried First reset signal RST1s of the scanning signal GATE of confession as one's own profession image element circuit；Scanning also with adjacent next line simultaneously Signal wire connects, so as to using the scanning signal GATE provided on the scan signal line of next line as the second of one's own profession image element circuit Reset signal RST2.
Meanwhile the image element circuit 10 per a line is gone back and adjacent next line in addition to the light emitting control line with one's own profession connects Light emitting control line connection, so as to using the signal provided on the light emitting control line of next line as one's own profession image element circuit first send out Optical control signal EM1.
In the display device 1 that the present embodiment provides, using above-mentioned configuration mode, Development allocation can be made to become simple. The technique effect for the image element circuit that may be referred to provide in embodiment of the disclosure on other technique effects, it is no longer superfluous here State.
The another embodiment of the disclosure also provides a kind of display device 1, and as shown in figure 11, the present embodiment provides aobvious The difference of display device shown in showing device 1 and Figure 10 is also to include a plurality of reset control line (RN-1、RN、RN+1Deng), The reset control line of part is illustrate only in Figure 11, embodiment of the disclosure includes but is not limited to this.For example, RN-1Represent N-1 Capable reset control line, RNRepresent the reset control line of Nth row, RN+1Represent the reset control line of N+1 rows.In the present embodiment In the display device 1 of offer, the first reset signal RST1 and the second reset signal RST2 in the image element circuit 10 of every a line are not There is provided by the scan signal line of adjacent lines, but provided by reset control line again.
For example, as shown in figure 11, in the present embodiment, the scan signal line of the image element circuit per a line 10 and one's own profession connects Connect, and no longer connected with the scan signal line of adjacent lines.The image element circuit 10 per a line resets control line with two and connected simultaneously, For example, the reset control line R of N-1 rowsN-1Connected with the first reset circuit in the image element circuit 10 of N-1 rows to provide One reset signal RST1, the reset control line R of Nth rowNConnected with the second reset circuit in the image element circuit 10 of N-1 rows with Second reset signal RST2 is provided.Likewise, the reset control line R of Nth rowNIt is multiple with first in the image element circuit 10 of Nth row Position circuit is connected to provide the first reset signal RST1, the reset control line R of N+1 rowsN+1In the image element circuit 10 of Nth row The second reset circuit connect to provide the second reset signal RST2.That is, the image element circuit 10 per a line is all and one's own profession The also reset control line connection of next line.
Referred on the other parts in the present embodiment and technique effect corresponding in the embodiment that is provided in Figure 10 Description, is repeated no more here.
It should be noted that display device 1 shown in Figure 10 and Figure 11 can also include a plurality of first voltage line and a plurality of Reset voltage line to provide first voltage VDD and resetting voltage VINT (not shown)s respectively.
For example, as shown in Figure 10 and Figure 11, the display device 1 can also include scan drive circuit 20 and data-driven electricity Road 30.
For example, data drive circuit 30 can be with a plurality of data signal line (DM、DM+1Deng) connection, to provide data-signal DATA；Simultaneously can also be connected with a plurality of first voltage line (not shown) and a plurality of reset voltage line (not shown) with First voltage VDD and resetting voltage VINT is provided respectively.
For example, scan drive circuit 20 can be with multi-strip scanning signal wire (GN-1、GN、GN+1Deng) connection, to provide scanning Signal GATE；And with a plurality of light emitting control line (EN-1、EN、EN+1Deng) connect to provide LED control signal；In display device 1 In the case of including a plurality of reset control line (as shown in figure 11), scan drive circuit 20 can also be with a plurality of reset control line (RN-1、RN、RN+1Deng) connect to provide reset signal.
For example, scan drive circuit 20 and data drive circuit 30 can be implemented as semiconductor chip.The display device 1 is also Miscellaneous part, such as time schedule controller, signal decoding circuit, voltage conversion circuit etc. can be included, these parts for example can be with Using existing conventional components, I will not elaborate.
For example, embodiment of the disclosure provide display device 1 can be Electronic Paper, mobile phone, tablet personal computer, television set, Any product or part with display function such as display, notebook computer, DPF, navigator.
An at least embodiment for the disclosure also provides a kind of driving method, can be used for driving embodiment of the disclosure to provide Image element circuit 10 and using the image element circuit 10 display device 1.For example, the driving method includes following operation.
In initial phase, the first reset signal RST1 is inputted, the first reset circuit 400 is opened, by resetting voltage VINT Apply to the control terminal 110 of drive circuit 100；The first LED control signal EM1 is inputted, opens the first emission control circuit 500, First voltage VDD is applied to the first end 120 of drive circuit 100.
In data write-in and compensated stage, scanning signal GATE and data-signal DATA, turn-on data write circuit are inputted 200th, drive circuit 100 and compensation circuit 300, data write circuit 200 mend data-signal DATA write driver circuits 100 Circuit 300 is repaid to compensate drive circuit 100.
In reseting stage, the second LED control signal EM2 and the second reset signal RST2 is inputted, opens the second light emitting control The reset circuit 800 of circuit 700 and second, resets to drive circuit 100, compensation circuit 300 and light-emitting component 600.
In glow phase, the first LED control signal EM1 and the second LED control signal EM2 is inputted, it is luminous to open first Control circuit 500, the second emission control circuit 700 and drive circuit 100, the second emission control circuit 700 apply driving current Light-emitting component 600 is added to so that it is luminous.
It should be noted that the detailed description on the driving method may be referred in embodiment of the disclosure for pixel The description of the operation principle of circuit 10, is repeated no more here.
The driving method that the present embodiment provides can improve due to the issuable short-term image retention problem of hesitation.
More than, the only embodiment of the disclosure, but the protection domain of the disclosure is not limited thereto, the disclosure Protection domain should be defined by scope of the claims.

Claims (14)

  1. A kind of 1. image element circuit, it is characterised in that including：Drive circuit, data write circuit, compensation circuit, first reset electricity Road, the first emission control circuit and light-emitting component；Wherein,
    The drive circuit includes control terminal, first end and the second end, and is configured to control and flows through the first end and described The driving current for being used to drive the light-emitting component luminous at two ends；
    The data write circuit is configured to write data-signal in response to scanning signal the control terminal of the drive circuit；
    The compensation circuit is configured to the data-signal of storage write-in and in response to the scanning signal to the driving electricity Road compensates；
    First reset circuit is configured to apply resetting voltage to the control of the drive circuit in response to the first reset signal End processed；
    First emission control circuit is configured to apply first voltage to the driving in response to the first LED control signal The first end of circuit.
  2. 2. image element circuit according to claim 1, it is characterised in that also include：Second emission control circuit, it is configured to ring The driving current should be applied to the light-emitting component in the second LED control signal, wherein,
    Second LED control signal is different from first LED control signal.
  3. 3. image element circuit according to claim 2, it is characterised in that also include：Second reset circuit, be configured in response to Second reset signal applies the resetting voltage to the second end of the drive circuit, wherein,
    Second reset signal is different from first reset signal.
  4. 4. image element circuit according to claim 3, it is characterised in that the drive circuit includes the first transistor；
    The grid of the first transistor connects as the control terminal of the drive circuit with first node, the first transistor The first pole connected as the first end of the drive circuit with section point, described in the second pole of the first transistor is used as Second end of drive circuit connects with the 3rd node.
  5. 5. image element circuit according to claim 4, it is characterised in that the data write circuit includes second transistor；
    The gate configuration of the second transistor is to be connected with scanning signal end to receive the scanning signal, second crystal First pole of pipe is configured to connect with data signal end to receive the data-signal, the second pole of the second transistor and institute State section point connection.
  6. 6. image element circuit according to claim 4, it is characterised in that the compensation circuit includes third transistor and storage Electric capacity；
    The gate configuration of the third transistor is to be connected with scanning signal end to receive the scanning signal, the 3rd crystal First pole of pipe connects with the 3rd node, and the second pole of the third transistor and the first pole of the storage capacitance connect Connect, the second pole of the storage capacitance is configured to connect with first voltage end.
  7. 7. image element circuit according to claim 4, it is characterised in that first reset circuit includes the 4th transistor；
    The gate configuration of 4th transistor is described to be connected with the first reseting controling end to receive first reset signal First pole of the 4th transistor connects with first node, and the second pole of the 4th transistor is configured to connect with resetting voltage end To receive the resetting voltage.
  8. 8. image element circuit according to claim 4, it is characterised in that first emission control circuit includes the 5th crystal Pipe；
    The gate configuration of 5th transistor is to be connected with the first light emitting control end to receive first LED control signal, First pole of the 5th transistor is configured to connect with first voltage end to receive the first voltage, the 5th transistor The second pole connected with section point.
  9. 9. image element circuit according to claim 4, it is characterised in that second emission control circuit includes the 6th crystal Pipe；
    The gate configuration of 6th transistor is to be connected with the second light emitting control end to receive second LED control signal, First pole of the 6th transistor connects with the 3rd node, and the second pole of the 6th transistor and fourth node connect Connect,
    First pole of the light-emitting component is configured to connect with the fourth node, the second pole of the light-emitting component be configured to and Second voltage end is connected to receive second voltage.
  10. 10. image element circuit according to claim 9, it is characterised in that second reset circuit includes the 7th transistor；
    The gate configuration of 7th transistor is described to be connected with the second reseting controling end to receive second reset signal First pole of the 7th transistor is connected with the fourth node, and the second pole of the 7th transistor is configured to and resetting voltage end Connect to receive the resetting voltage.
  11. 11. a kind of display device, it is characterised in that including in multiple pixel cells of array distribution, multi-strip scanning signal wire, more Data signal wire and a plurality of light emitting control line, wherein,
    Each pixel cell includes image element circuit as claimed in claim 1,
    The scan signal line of Nth row is connected to provide with the data write circuit in the image element circuit of Nth row with compensation circuit State scanning signal；
    The data signal line of m column is connected with the data write circuit in the image element circuit of m column to provide the data-signal；
    The scan signal line of N-1 rows is connected with the first reset circuit in the image element circuit of Nth row, and the N-1 rows are swept The scanning signal inputted on signal wire is retouched to provide to first reset circuit as first reset signal；
    The light emitting control line of N+1 rows is connected with the first emission control circuit in the image element circuit of Nth row to provide described One LED control signal；
    N is the integer more than 1, and M is the integer more than 0.
  12. 12. display device according to claim 11, it is characterised in that the image element circuit also includes：
    Second emission control circuit, it is configured to apply the driving current to described luminous in response to the second LED control signal Element, second LED control signal are different from first LED control signal；And
    Second reset circuit, it is configured to apply the resetting voltage to the of the drive circuit in response to the second reset signal Two ends and the compensation circuit, second reset signal are different from first reset signal；
    The light emitting control line of Nth row is connected with the second emission control circuit in the image element circuit of Nth row to provide described second LED control signal；
    The scan signal line of N+1 rows is connected with the second reset circuit in the image element circuit of Nth row, and the N+1 rows are swept The scanning signal inputted on signal wire is retouched to provide to second reset circuit as second reset signal.
  13. 13. a kind of display device, it is characterised in that including in multiple pixel cells of array distribution, multi-strip scanning signal wire, more Data signal wire, a plurality of reset control line and a plurality of light emitting control line, wherein,
    Each pixel cell includes image element circuit as claimed in claim 1,
    The scan signal line of Nth row is connected to provide with the data write circuit in the image element circuit of Nth row with compensation circuit State scanning signal；
    The data signal line of m column is connected with the data write circuit in the image element circuit of m column to provide the data-signal；
    The reset control line of Nth row connects with the first reset circuit in the image element circuit of Nth row to be resetted with providing described first Signal；
    The light emitting control line of N+1 rows is connected with the first emission control circuit in the image element circuit of Nth row to provide described One LED control signal；
    N and M is the integer more than 0.
  14. 14. display device according to claim 13, it is characterised in that the image element circuit also includes：
    Second emission control circuit, it is configured to apply the driving current to described luminous in response to the second LED control signal Element, second LED control signal are different from first LED control signal；And
    Second reset circuit, it is configured to apply the resetting voltage to the of the drive circuit in response to the second reset signal Two ends and the compensation circuit, second reset signal are different from first reset signal；
    The light emitting control line of Nth row is connected with the second emission control circuit in the image element circuit of Nth row to provide described second LED control signal；
    The reset control line of N+1 rows connects multiple to provide described second with the second reset circuit in the image element circuit of Nth row Position signal.
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