CN204288766U - A kind of image element circuit, organic EL display panel and display device - Google Patents
A kind of image element circuit, organic EL display panel and display device Download PDFInfo
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- CN204288766U CN204288766U CN201420833497.0U CN201420833497U CN204288766U CN 204288766 U CN204288766 U CN 204288766U CN 201420833497 U CN201420833497 U CN 201420833497U CN 204288766 U CN204288766 U CN 204288766U
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Abstract
The utility model discloses a kind of image element circuit, organic EL display panel and display device, at replacement and compensated stage, the charge control module of image element circuit, by data signal end and the first input end conducting resetting control module, resets control module and carries out reset process and reference voltage compensation deals to the control end of driver module and output terminal; In data write phase, the data-signal that data signal end inputs is written to the first input end resetting control module by charge control module; In glow phase, the output terminal of light emitting control module conducting driver module and the input end of luminescent device, the data-signal being input to driver module is carried out integration with the reference voltage signal compensating to driver module drives luminescent device luminous, the drive current and the power supply voltage signal that achieve the luminescence of driving luminescent device have nothing to do, the impact that the decay eliminating the power supply voltage signal being input to image element circuit produces the luminosity of luminescent device, ensure that the display effect of display panel.
Description
Technical field
The utility model relates to display technique field, particularly relates to a kind of image element circuit, organic EL display panel and display device.
Background technology
Along with the progress of display technique, organic light emitting display (Organic Light Emitting Diode, OLED) be one of the focus of current flat-panel monitor research field, increasing active matrix organic light-emitting diode (Active Matrix Organic Light Emitting Diode, AMOLED) display panel comes into the market, relative to traditional liquid crystal display panel of thin film transistor (Thin Film Transistor LiquidCrystal Display, TFT LCD), AMOLED has reaction velocity faster, higher contrast and more vast visual angle.
The circuit structure of existing AMOLED pixel circuit, as shown in Figure 1, comprise: the first switching transistor M1, second switch transistor M2, the 3rd switching transistor M3, the 4th switching transistor M4, the 5th switching transistor M5, memory capacitance C, and luminescent device OLED; Wherein, the grid of the first switching transistor M1 is connected with one end of memory capacitance C with the source electrode of second switch transistor M2 respectively, source electrode is connected with the first reference signal end VDD, drains to be connected with the source electrode of the 5th switching transistor M5 with the drain electrode of second switch transistor M2; The grid of second switch transistor M2 is connected with sweep signal end Scan; The grid of the 3rd switching transistor M3 is connected with sweep signal end Scan, and source electrode is connected with data signal end Data, and drain electrode is connected with the other end of memory capacitance C with the drain electrode of the 4th switching transistor M4 respectively; The grid of the 4th switching transistor M4 is connected with sweep signal end Scan, and source electrode is connected with the second reference signal end Vsus; The grid of the 5th switching transistor M5 is connected with sweep signal end Scan, drains to be connected with one end of luminescent device OLED; The other end of luminescent device OLED is connected with the 3rd reference signal end VSS.
Fig. 2 is the working timing figure of the image element circuit shown in Fig. 1, as shown in Figure 2, in the t1 time period, sweep signal input end Scan input low level signal, therefore second switch transistor M2 and the 3rd switching transistor conducting, 4th switching transistor M4 and the 5th switching transistor M5 ends, signal now on data signal end Data is written to the left end of memory capacitance C by the 3rd switching transistor M3 of conducting, namely the voltage of b point is Vb=Vdata, the voltage Va=VDD-Vth of the voltage of memory capacitance C right-hand member and a point, Vth is the threshold voltage of the first switching transistor M1, simultaneously, due to second switch transistor M2 conducting, therefore the voltage of c point is equal with the voltage of a point, i.e. Vc=Va=VDD-Vth, voltage difference now between memory capacitance C two ends is Vb-Va=Vdata-VDD+Vth, in the t2 time period, sweep signal input end Scan input high level signal, therefore the 4th switching transistor M4 and the 5th switching transistor M5 conducting, second switch transistor M2 and the 3rd switching transistor M3 ends, 4th switching transistor M4 of conducting is by the left end of the second reference signal end Vsus and memory capacitance C and the conducting of b point, therefore the voltage of b point becomes Vsus, the voltage Va=Vsus-Vdata+VDD-Vth of a point, and be in cut-off state due to second switch transistor M2, therefore the voltage of c point remains VDD-Vth, the drain electrode of 5th switching transistor M5 by the first switching transistor M1 of now conducting and one end conducting of luminescent device OLED, make the drain electrode output driving current of the first switching transistor M1 to luminescent device OLED, driving OLED is luminous.As the above analysis, the t1 stage is data-signal write phase, and the t2 stage is glow phase, at the drive current of t2 stage first switching transistor M1 driving luminescent device OLED luminescence is:
Wherein, Vgs is the voltage difference between the grid of the first switching transistor and source electrode, and β is the parameter relevant with characteristic dimension with the technological parameter of the first switching transistor M1.As can be seen from above-mentioned derivation formula, drive the drive current of luminescent device OLED luminescence relevant with the voltage signal that the second reference signal end Vsus inputs, the voltage signal that second reference signal end Vsus inputs in a particular embodiment can be the voltage signal of the first reference signal end VDD, i.e. power supply voltage signal, but for image element circuit provides the electric power network of power supply voltage signal passing through power signal line, when power supply voltage signal from signal source is transferred in coupled image element circuit respectively, there will be voltage attenuation (IR Drop), thus have impact on the luminosity of luminescent device OLED, and then can have an impact to the display effect of display panel.
Therefore, the impact that the decay (IR Drop) how improving the power supply voltage signal inputted in image element circuit produces the luminosity of luminescent device OLED is the problem that those skilled in the art need solution badly.
Utility model content
The utility model embodiment provides a kind of image element circuit, organic EL display panel and display device, the problem that the luminosity of decay to luminescent device in order to solve the power supply voltage signal inputted in the image element circuit that exists in prior art has an impact.
The utility model embodiment provides a kind of image element circuit, comprising: charge control module, driver module, replacement control module, light emitting control module, and luminescent device; Wherein,
The control end of described charge control module is connected with sweep signal end, and input end is connected with data signal end, and output terminal is connected with the first input end of described replacement control module;
The control end of described replacement control module is connected with threshold voltage signal end, second input end is connected with the input end of reference signal end with described driver module respectively, first output terminal is connected with the control end of described driver module, and the second output terminal is connected with the input end of described light emitting control module with the output terminal of described driver module respectively;
The control end of described light emitting control module is connected with luminous signal end, and output terminal is connected with the input end of described luminescent device; The output terminal of described luminescent device is connected with low level signal end;
At replacement and compensated stage, described charge control module is by the first input end conducting of described data signal end and described replacement control module under the control of described sweep signal end, and described replacement control module carries out reset process and reference voltage compensation deals to the control end of described driver module and output terminal under the control of described threshold voltage signal end and described reference signal end; In data write phase, the data-signal that described data signal end inputs is written to the first input end of described replacement control module by described charge control module under the control of described sweep signal end; In glow phase, described light emitting control module is under the control of described luminous signal end, and the output terminal of driver module described in conducting and the input end of described luminescent device, drive described luminescent device luminous.
In a kind of possible embodiment, in the above-mentioned image element circuit that the utility model embodiment provides, described replacement control module, specifically comprises: the first electric capacity, the second electric capacity, and the first switching transistor; Wherein,
The grid of described first switching transistor is connected with threshold voltage signal end, and source electrode is connected with the control end of described driver module, and drain electrode is connected with the input end of described light emitting control module with the output terminal of described driver module respectively;
Described first electric capacity is connected between the output terminal of described charge control module and the control end of described driver module;
Described second electric capacity is connected between described reference signal end and the control end of described driver module.
In a kind of possible embodiment, in the above-mentioned image element circuit that the utility model embodiment provides, described first switching transistor is P-type crystal pipe.
In a kind of possible embodiment, in the above-mentioned image element circuit that the utility model embodiment provides, described charge control module, specifically comprises: second switch transistor;
The grid of described second switch transistor is connected with described sweep signal end, and source electrode is connected with described data signal end, drains to be connected with the first input end of described replacement control module.
In a kind of possible embodiment, in the above-mentioned image element circuit that the utility model embodiment provides, described second switch transistor is P-type crystal pipe.
In a kind of possible embodiment, in the above-mentioned image element circuit that the utility model embodiment provides, described driver module, specifically comprises: driving transistors;
The grid of described driving transistors is connected with the first output terminal of described replacement control module, and source electrode is connected with described reference signal end, and drain electrode is connected with the input end of described light emitting control module with the second output terminal of described replacement control module respectively.
In a kind of possible embodiment, in the above-mentioned image element circuit that the utility model embodiment provides, described driving transistors is P-type crystal pipe.
In a kind of possible embodiment, in the above-mentioned image element circuit that the utility model embodiment provides, described light emitting control module, specifically comprises: the 3rd switching transistor;
The grid of described 3rd switching transistor is connected with described luminous signal end, and source electrode is connected with the second output terminal of described replacement control module with the output terminal of described driver module respectively, drains to be connected with the input end of described luminescent device.
In a kind of possible embodiment, in the above-mentioned image element circuit that the utility model embodiment provides, described 3rd switching transistor is P-type crystal pipe.
The utility model embodiment provides a kind of organic EL display panel, comprises the above-mentioned image element circuit that the utility model embodiment provides.
The utility model embodiment provides a kind of display device, comprises the above-mentioned organic EL display panel that the utility model embodiment provides.
The beneficial effect of the utility model embodiment comprises:
The utility model embodiment provides a kind of image element circuit, organic EL display panel and display device, at replacement and compensated stage, charge control module in image element circuit under the control of sweep signal end by data signal end with reset the first input end conducting of control module, reset control module, under the control of threshold voltage signal end and reference signal end, reset process and reference voltage compensation deals carried out to the control end of driver module and output terminal, in data write phase, the data-signal that data signal end inputs is written to the first input end resetting control module by charge control module under the control of sweep signal end, in glow phase, light emitting control module is under the control of luminous signal end, the output terminal of conducting driver module and the input end of luminescent device, the data-signal being input to driver module the most at last and the reference voltage signal compensating to driver module are integrated, driving luminescent device is luminous, like this, achieve and drive the drive current of luminescent device luminescence to have nothing to do with the power supply voltage signal being input to image element circuit, eliminate the decay of the power supply voltage signal owing to being input to image element circuit, on the impact that the luminosity of luminescent device produces, and then ensure that the display effect of display panel.
Accompanying drawing explanation
Fig. 1 is image element circuit structure schematic diagram in prior art;
The specific works sequential chart that Fig. 2 is the image element circuit shown in Fig. 1;
The image element circuit structure schematic diagram that Fig. 3 provides for the utility model embodiment;
The concrete structure schematic diagram of the image element circuit that Fig. 4 provides for the utility model embodiment;
The specific works sequential chart that Fig. 5 is image element circuit shown in Fig. 4;
The organic EL display panel structural representation that Fig. 6 provides for the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of image element circuit, organic EL display panel and display device that the utility model embodiment provides is described in detail.
The utility model embodiment provides a kind of image element circuit, as shown in Figure 3, comprising: charge control module 01, driver module 02, replacement control module 03, light emitting control module 04, and luminescent device 05; Wherein, the control end of charge control module 01 is connected with sweep signal end Gate, and input end is connected with data signal end Data, and output terminal is connected with the first input end resetting control module 03;
The control end resetting control module 03 is connected with threshold voltage signal end VTH, second input end is connected with the input end of driver module 02 with reference signal end VDD respectively, first output terminal is connected with the control end of driver module 02, and the second output terminal is connected with the input end of light emitting control module 04 with the output terminal of driver module 02 respectively;
The control end of light emitting control module 04 is connected with luminous signal end EM, and output terminal is connected with the input end of luminescent device 05; The output terminal of luminescent device 05 is connected with low level signal end VSS;
At replacement and compensated stage, charge control module 01 by data signal end Data and the first input end conducting resetting control module 03, resets control module 03 and carry out reset process and reference voltage compensation deals to the control end of driver module 02 and output terminal under the control of threshold voltage signal end VTH and reference signal end VDD under the control of sweep signal end Gate; In data write phase, the data-signal that data signal end Data inputs is written to the first input end resetting control module 03 by charge control module 01 under the control of sweep signal end Gate; In glow phase, light emitting control module 04 is under the control of luminous signal end EM, and the output terminal of conducting driver module 02 and the input end of luminescent device 05, drive luminescent device 05 luminous.
The above-mentioned image element circuit that the utility model embodiment provides, at replacement and compensated stage, charge control module 01 under the control of sweep signal end Gate by data signal end Data with reset the first input end conducting of control module 03, the data-signal that data signal end Data inputs is input to the first input end resetting module 03, reset control module 03, under the control of threshold voltage signal end VTH and reference signal end VDD, reset process and reference voltage compensation deals are carried out to the control end of driver module 02 and output terminal, namely at reset phase, reference signal end VDD input low level low, replacement control module 03 control end to driver module 02 and output terminal reset, at compensated stage, reference signal end VDD input high level ELVDD, the control end and the output terminal that reset control module 03 pair of driver module 02 charge, complete compensation, in data write phase, the data-signal that data signal end Data inputs is written to the first input end resetting control module 03 by charge control module 01 under the control of sweep signal end Gate, and then resets the control end that data-signal is written to driver module 02 by control module 03, in glow phase, light emitting control module 04 is under the control of luminous signal end EM, the output terminal of conducting driver module 02 and the input end of luminescent device 05, the data-signal being finally written to driver module 02 and the reference voltage signal compensating to driver module 02 are after integrating cancellation power supply voltage signal, drive luminescent device 05 luminous, like this, the drive current and the power supply voltage signal that achieve the luminescence of driving luminescent device have nothing to do, eliminate the decay of the power supply voltage signal owing to being input to image element circuit, on the impact that the luminosity of luminescent device produces, and then ensure that the display effect of display panel.
In the specific implementation, in the above-mentioned image element circuit that the utility model embodiment provides, as shown in Figure 4, reset control module 03, can specifically comprise: the first electric capacity C1, the second electric capacity C2, and the first switching transistor T1; Wherein, the grid of the first switching transistor T1 is connected with threshold voltage signal end VTH, and source electrode is connected with the control end of driver module 02, and drain electrode is connected with the input end of light emitting control module 04 with the output terminal of driver module 02 respectively; First electric capacity C1 is connected between the output terminal of charge control module 01 and the control end of driver module 02; Second electric capacity C2 is connected between the control end of reference signal end VDD and driver module 02.Like this, at reset phase, first switching transistor T1 conducting under the control of threshold voltage signal end VTH, first switching transistor T1 of conducting is by the control end of driver module 02 and output terminal conducting, now, reference signal end input low level low, carries out reset process to the control end of driver module 02 and output terminal; At compensated stage, reference signal end VDD input high level ELVDD, now the first switching transistor T1 is still in conducting state, first switching transistor T1 of conducting, by the control end of driver module 02 and output terminal conducting, completes the compensation to the control end of driver module 02 and the reference voltage of output terminal.
In the specific implementation, in the above-mentioned image element circuit that the utility model embodiment provides, as shown in Figure 4, first switching transistor T1 is P-type crystal pipe, like this, when threshold voltage signal end VTH input low level signal, the first switching transistor T1 is in conducting state, and the first switching transistor T1 of conducting is by the control end of driver module 02 and output terminal conducting.
In the specific implementation, in the above-mentioned image element circuit that the utility model embodiment provides, as shown in Figure 4, charge control module 01, can specifically comprise: second switch transistor T2; The grid of second switch transistor T2 is connected with sweep signal end Gate, and source electrode is connected with data signal end Data, drains to be connected with the first input end resetting control module 03.Like this, at reset phase and compensated stage, second switch transistor T2 conducting under the control of sweep signal end Gate, the data-signal that data signal end Data inputs by data signal end Data and the first input end conducting resetting control module 03, and then is written to the first input end resetting control module 03 by the second switch transistor T2 of conducting; In data write phase, second switch transistor T2 is still in conducting state, and the reference voltage signal Vref that data signal end Data inputs by the second switch transistor T2 of conducting is written to the first input end resetting control module 03.
In the specific implementation, in the above-mentioned image element circuit that the utility model embodiment provides, as shown in Figure 4, second switch transistor T2 is P-type crystal pipe.Like this, when sweep signal end Gate input low level signal, second switch transistor T2 is in conducting state, and the second switch transistor T2 of conducting is by data signal end Data and the first input end conducting resetting control module 03.
In the specific implementation, in the above-mentioned image element circuit that the utility model embodiment provides, as shown in Figure 4, driver module 02, can specifically comprise: driving transistors D1; The grid of driving transistors D1 is connected with the first output terminal resetting control module 03, source electrode is connected with reference signal end VDD, drain electrode is connected with the input end of light emitting control module 04 with the second output terminal resetting control module 03 respectively, and driving transistors D1 is P-type crystal pipe.Like this, at reset phase, reference signal end input low level signal low, resets to the grid of driving transistors D1, guarantees in the state of compensated stage driving transistors D1 pipe for opening, to complete compensation process.
In the specific implementation, in the above-mentioned image element circuit that the utility model embodiment provides, as shown in Figure 4, light emitting control module 04, can specifically comprise: the 3rd switching transistor T3; The grid of the 3rd switching transistor T3 is connected with luminous signal end EM, and source electrode is connected with the second output terminal resetting control module 03 with the output terminal of driver module 02 respectively, drains to be connected with the input end of luminescent device 05.Like this, in glow phase, 3rd switching transistor T3 conducting under the control of luminous signal end EM, 3rd switching transistor T3 of conducting, by the input end conducting of the output terminal of driver module 02 and illuminator 05, makes driver module 02 drive luminescent device 05 to realize normal luminous function in glow phase.
In the specific implementation, in the above-mentioned image element circuit that the utility model embodiment provides, as shown in Figure 4, the 3rd switching transistor T3 is P-type crystal pipe.Like this, when luminous signal end EM input low level signal, the 3rd switching transistor T3 is in conducting state, and the 3rd switching transistor T3 of conducting is by the input end conducting of the output terminal of driver module 02 and luminescent device 05.
It should be noted that the switching transistor mentioned in the utility model above-described embodiment and driving transistors can be thin film transistor (TFT) (TFT, Thin Film Transistor), also can be metal oxide semiconductor field effect tube (MOS, Metal Oxide Scmiconductor), do not limit at this.In concrete enforcement, source electrode and the drain electrode of these transistors can be exchanged, and do not do concrete differentiation.
The image element circuit provided below in conjunction with the utility model embodiment and the course of work of work schedule to the image element circuit that the utility model embodiment provides are described in detail.With the input and output sequential chart of the Fig. 4 shown in image element circuit as shown in Figure 4 and Fig. 5, the course of work of the image element circuit that the utility model embodiment provides is done to describe.Particularly, the t1 ~ t4 four-stage in input and output sequential chart is as shown in Figure 5 chosen.Represent high level signal with 1 in following description, 0 represents low level signal.
In the t1 stage, VDD=low, VTH=0, Gate=0, Data=DATA, EM=1.Due to VTH=0, Gate=0, therefore the first switching transistor T1 and second switch transistor T2 conducting; Due to EM=1, therefore the 3rd switching transistor T3 ends.First switching transistor T1 of conducting is by the grid of driving transistors D1 and drain electrode conducting, the second switch transistor T2 of conducting is by one end conducting of data signal end Data and the first electric capacity C1, now, reference signal end VDD input low level signal low, therefore the grid of driving transistors D1 and the voltage of drain electrode are low-Vth, wherein Vth is the threshold voltage of driving transistors D1, voltage difference then now between the first electric capacity C1 two ends is DATA-low+Vth, and the voltage difference between the second electric capacity C2 two ends is Vth.The t1 stage is reset phase.
In the t2 stage, VDD=ELVDD, VTH=0, Gate=0, Data=DATA, EM=1.Due to VTH=0, Gate=0, therefore the first switching transistor T1 and second switch transistor T2 conducting; Due to EM=1, therefore the 3rd switching transistor T3 ends.First switching transistor T1 of conducting is by the grid of driving transistors D1 and drain electrode conducting, the second switch transistor T2 of conducting is by one end conducting of data signal end Data and the first electric capacity C1, now, reference signal end VDD input high level signal ELVDD, therefore the grid of driving transistors D1 is charged by driving transistors D1 and the first switching transistor T1, when the gate charges of driving transistors D1 is to ELVDD-Vth, driving transistors D1 ends and complete charge.Now, the voltage that driving transistors D1 drains is similarly ELVDD-Vth, then the voltage difference now between the first electric capacity C1 two ends is DATA-ELVDD+Vth, and the voltage difference between the second electric capacity C2 two ends is Vth.The t2 stage is compensated stage.
In the t3 stage, VDD=ELVDD, VTH=1, Gate=0, Data=Vref, EM=1.Due to Gate=0, therefore second switch transistor T2 conducting; Due to VTH=1, EM=1, therefore the first switching transistor T1 and the 3rd switching transistor T3 ends.The second switch transistor T2 of conducting is by one end conducting of data signal end Data and the first electric capacity C1, now, reference signal end VDD input high level signal ELVDD, the data-signal of data signal end Data input is Vref, therefore the voltage of the grid of driving transistors D1 is ELVDD-Vth-DATA+Vref, and the voltage of driving transistors D1 maintains voltage ELVDD-Vth on last stage.The t3 stage is data write phase.
In the t4 stage, VDD=ELVDD, VTH=1, Gate=1, Data=0, EM=0.Due to EM=0, therefore the 3rd switching transistor T3 conducting; Due to VTH=1, Gate=1, therefore the first switching transistor T1 and second switch transistor T2 ends.3rd switching transistor T3 of conducting, by the input end conducting of the drain electrode of driving transistors D1 and luminescent device 05, makes driving transistors D1 drive luminescent device 05 to realize normal luminous function.The t4 stage is glow phase.
In the t4 stage, the voltage of driving transistors D1 grid is ELVDD-Vth-DATA+Vref, and the voltage of drain electrode is ELVDD-Vth, drives the drive current I=K (Vgs-Vth) of luminescent device 05 luminescence
2=K (Vref – DATA-Vth)
2, wherein, K is the constant relevant with physical dimension with the technological parameter of driving transistors D1, and Vgs is the voltage difference between the grid of driving transistors D1 and source electrode.As the above analysis, the On current of luminescent device 05 really and reference voltage end VDD power supply voltage signal have nothing to do, thus eliminate the decay of the power supply voltage signal owing to being input to image element circuit, on the impact that the luminosity of luminescent device 05 produces.
Conceive based on same utility model, the utility model embodiment provides a kind of organic EL display panel, comprises the above-mentioned image element circuit that the utility model embodiment provides.The principle of dealing with problems due to this organic EL display panel is similar to image element circuit, and therefore the enforcement of this organic EL display panel see the enforcement of above-mentioned image element circuit, can repeat part and repeat no more.
In the specific implementation, in the organic EL display panel that the utility model embodiment provides, as shown in Figure 6, can by grid electrode drive module respectively to the reference signal end VDD in image element circuit, sweep signal end Gate, threshold voltage signal end VTH, and luminous signal end EM provides corresponding control signal, provides data-signal DATA and Vref by source drive module in different phase respectively to data signal end Data.
Conceive based on same utility model, the utility model embodiment provides a kind of display device, and this display device can be applied to any product or parts with Presentation Function such as mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.The principle of dealing with problems due to this display device is similar to picture organic EL display panel, and therefore the enforcement of this display device see the enforcement of above-mentioned organic EL display panel, can repeat part and repeat no more.
The utility model embodiment provides a kind of image element circuit, organic EL display panel and display device, at replacement and compensated stage, charge control module in image element circuit under the control of sweep signal end by data signal end with reset the first input end conducting of control module, reset control module, under the control of threshold voltage signal end and reference signal end, reset process and reference voltage compensation deals carried out to the control end of driver module and output terminal; In data write phase, the data-signal that data signal end inputs is written to the first input end resetting control module by charge control module under the control of sweep signal end; In glow phase, light emitting control module is under the control of luminous signal end, the output terminal of conducting driver module and the input end of luminescent device, the data-signal being input to driver module the most at last and the reference voltage signal compensating to driver module are integrated, driving luminescent device is luminous, like this, the drive current and the power supply voltage signal that achieve the luminescence of driving luminescent device have nothing to do, eliminate the decay of the power supply voltage signal owing to being input to image element circuit, on the impact that the luminosity of luminescent device produces, and then ensure that the display effect of display panel.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (11)
1. an image element circuit, is characterized in that, comprising: charge control module, driver module, replacement control module, light emitting control module, and luminescent device; Wherein,
The control end of described charge control module is connected with sweep signal end, and input end is connected with data signal end, and output terminal is connected with the first input end of described replacement control module;
The control end of described replacement control module is connected with threshold voltage signal end, second input end is connected with the input end of reference signal end with described driver module respectively, first output terminal is connected with the control end of described driver module, and the second output terminal is connected with the input end of described light emitting control module with the output terminal of described driver module respectively;
The control end of described light emitting control module is connected with luminous signal end, and output terminal is connected with the input end of described luminescent device; The output terminal of described luminescent device is connected with low level signal end;
At replacement and compensated stage, described charge control module is by the first input end conducting of described data signal end and described replacement control module under the control of described sweep signal end, and described replacement control module carries out reset process and reference voltage compensation deals to the control end of described driver module and output terminal under the control of described threshold voltage signal end and described reference signal end; In data write phase, the data-signal that described data signal end inputs is written to the first input end of described replacement control module by described charge control module under the control of described sweep signal end; In glow phase, described light emitting control module is under the control of described luminous signal end, and the output terminal of driver module described in conducting and the input end of described luminescent device, drive described luminescent device luminous.
2. image element circuit as claimed in claim 1, it is characterized in that, described replacement control module, specifically comprises: the first electric capacity, the second electric capacity, and the first switching transistor; Wherein,
The grid of described first switching transistor is connected with threshold voltage signal end, and source electrode is connected with the control end of described driver module, and drain electrode is connected with the input end of described light emitting control module with the output terminal of described driver module respectively;
Described first electric capacity is connected between the output terminal of described charge control module and the control end of described driver module;
Described second electric capacity is connected between described reference signal end and the control end of described driver module.
3. image element circuit as claimed in claim 2, it is characterized in that, described first switching transistor is P-type crystal pipe.
4. image element circuit as claimed in claim 1, it is characterized in that, described charge control module, specifically comprises: second switch transistor;
The grid of described second switch transistor is connected with described sweep signal end, and source electrode is connected with described data signal end, drains to be connected with the first input end of described replacement control module.
5. image element circuit as claimed in claim 4, it is characterized in that, described second switch transistor is P-type crystal pipe.
6. image element circuit as claimed in claim 1, it is characterized in that, described driver module, specifically comprises: driving transistors;
The grid of described driving transistors is connected with the first output terminal of described replacement control module, and source electrode is connected with described reference signal end, and drain electrode is connected with the input end of described light emitting control module with the second output terminal of described replacement control module respectively.
7. image element circuit as claimed in claim 6, it is characterized in that, described driving transistors is P-type crystal pipe.
8. image element circuit as claimed in claim 1, it is characterized in that, described light emitting control module, specifically comprises: the 3rd switching transistor;
The grid of described 3rd switching transistor is connected with described luminous signal end, and source electrode is connected with the second output terminal of described replacement control module with the output terminal of described driver module respectively, drains to be connected with the input end of described luminescent device.
9. image element circuit as claimed in claim 8, it is characterized in that, described 3rd switching transistor is P-type crystal pipe.
10. an organic EL display panel, is characterized in that, comprises the image element circuit as described in any one of claim 1-9.
11. 1 kinds of display device, is characterized in that, comprise organic EL display panel as claimed in claim 10.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409051A (en) * | 2014-12-24 | 2015-03-11 | 京东方科技集团股份有限公司 | Pixel circuit, organic electroluminescent display panel and display device |
| CN108492770A (en) * | 2018-03-27 | 2018-09-04 | 京东方科技集团股份有限公司 | A kind of pixel compensation circuit, its driving method and display panel, display device |
| CN111044874A (en) * | 2019-12-31 | 2020-04-21 | 武汉天马微电子有限公司 | Display module, detection method and electronic equipment |
-
2014
- 2014-12-24 CN CN201420833497.0U patent/CN204288766U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409051A (en) * | 2014-12-24 | 2015-03-11 | 京东方科技集团股份有限公司 | Pixel circuit, organic electroluminescent display panel and display device |
| CN108492770A (en) * | 2018-03-27 | 2018-09-04 | 京东方科技集团股份有限公司 | A kind of pixel compensation circuit, its driving method and display panel, display device |
| US11158250B2 (en) | 2018-03-27 | 2021-10-26 | Boe Technology Group Co., Ltd. | Pixel compensation circuit, method for driving the same, display panel, and display device |
| CN111044874A (en) * | 2019-12-31 | 2020-04-21 | 武汉天马微电子有限公司 | Display module, detection method and electronic equipment |
| CN111044874B (en) * | 2019-12-31 | 2022-05-24 | 武汉天马微电子有限公司 | Display module, detection method and electronic equipment |
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