KR101535822B1 - Light emitting display and method for driving the same - Google Patents

Abstract

The present invention relates to a light emitting display device and a driving method thereof for stabilizing a driving switching element of light emitting devices provided in a light emitting display panel to improve the image quality of the light emitting display panel, A light emitting display panel including a light emitting element and a pixel driver for driving the light emitting element; A temperature detection circuit section for detecting a temperature of the light emitting display panel through a temperature sensor provided in the light emitting display panel and a stabilization control signal having a pulse width varied corresponding to the detected temperature, And a panel driver for changing the threshold voltage stabilization period of the driving transistor provided in each of the pixel driving units.

An organic light emitting device, a light emitting display panel, a driving transistor, a threshold voltage sensing,

Description

TECHNICAL FIELD [0001] The present invention relates to a light emitting display,

The present invention relates to a light emitting display device, and more particularly, to a light emitting display device and a driving method thereof that stabilize a driving transistor of light emitting devices provided in a light emitting display panel to improve the image quality of the light emitting display panel.

In an active matrix organic light emitting display device, a plurality of pixels are arranged in a matrix form to display an image. As shown in FIG. 1, each pixel of the organic light emitting display includes an organic light emitting diode (OLED) and a pixel driving unit 10 that independently drives the OLED.

The OLED includes a cathode connected to the pixel driver 10, an anode connected to the power source line PL, and an organic layer formed between the anode and the cathode.

The pixel driver 10 includes a gate line GL for supplying a scan signal, a data line DL for supplying a data signal, a power supply line PL for supplying a power supply signal, a gate line GL and a data line DL, And a storage capacitor Cst connected between the power supply line PL and the power supply line PL to drive the OLED.

Such a light emitting display device is driven by being divided into a non-emission period and a light emission period. At this time, the driving transistor T2 is initialized in a non-emission period, and drives the OLED according to a data signal input through a data line DL and a switching transistor T1 during a light emission period.

However, since each of the driving transistors T2 of the conventional light emitting display panel is affected by the threshold voltage level at the ambient temperature change, there is a problem that the display image quality is lowered due to the variation of the threshold voltage Respectively. Specifically, each of the driving transistors T2 for driving the OLED changes its threshold voltage level corresponding to the ambient temperature change, in particular, the temperature change of the light emitting display panel. However, if the threshold voltage level fluctuates as described above, it is impossible to drive the OLED so as to exactly correspond to the data signal level, so that the image quality of the display image is lowered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a light emitting display device and a driving method thereof for stabilizing a driving transistor of light emitting devices provided in a light emitting display panel, .

According to another aspect of the present invention, there is provided a light emitting display including: a light emitting display panel including a light emitting element and a pixel driver for driving the light emitting element in each of a plurality of pixel cells arranged in a matrix; A temperature detection circuit section for detecting a temperature of the light emitting display panel through a temperature sensor provided in the light emitting display panel and a stabilization control signal having a pulse width varied corresponding to the detected temperature, And a panel driver for changing the threshold voltage stabilization period of the driving transistor provided in each of the pixel driving units.

Wherein the pixel driver includes a plurality of switching transistors for controlling on / off timing of the light emitting element, at least one storage capacitor for keeping the driving transistor and the light emitting element on for one frame, The switching transistor of any one of the switching transistors connects the gate electrode and the drain electrode of the driving transistor to each other in response to a stabilization control voltage inputted during a period corresponding to the pulse width of the stabilization control signal, .

The panel driver includes a gate driver for driving the gate lines and the control lines of the light emitting display panel, a data driver for driving the data lines of the light emitting display panel, a power supply for driving the power lines of the light emitting display panel, And a timing controller for generating a control signal to control the data and gate driver and generating a stabilization control signal having a changed pulse width and supplying the generated stabilization control signal to the gate driver.

The timing control unit analyzes the temperature data from the temperature detection circuit unit to determine whether the light emitting display panel is in the normal temperature, the low temperature, or the high temperature state, and adjusts the pulse width corresponding to the normal temperature, And generating a stabilization control signal having a pulse width different from that of the stabilization control signal, and supplying the stabilization control signal to a shift register of the gate driving unit.

The other shift register of the gate driving unit shifts the stabilization control signal to which the pulse width is converted so as to sequentially generate the stabilization control voltage so as to have a pulse width equal to the pulse width of the stabilization control signal, And sequentially supplying the liquid.

According to another aspect of the present invention, there is provided a method of driving a light emitting display including a light emitting element in each of a plurality of pixel cells arranged in a matrix, and a pixel driving unit driving the light emitting element, A method of driving a light emitting display device including a display panel, the method comprising: detecting a temperature of the light emitting display panel through a temperature sensor included in the light emitting display panel; Generating a stabilization control signal having a pulse width corresponding to the detected temperature, and changing a threshold voltage stabilization period of the driving transistor included in each of the pixel driving units according to the generated stabilization control signal, do.

Wherein the step of varying the threshold voltage stabilization period of the driving transistor includes the steps of generating a stabilization control voltage input during a period corresponding to the pulse width of the stabilization control signal, And the driving transistor is connected in a diode form by connecting the electrodes to each other.

Wherein the step of generating the stabilization control signal having the changed pulse width comprises the steps of: determining whether the light emitting display panel is at a room temperature, a low temperature, or a high temperature by analyzing a temperature of the light emitting display panel; And changing a pulse width of the stabilization control signal so as to have a pulse width corresponding to a state of the stabilization control signal.

Wherein the step of generating the stabilization control voltage includes shifting a stabilization control signal to which the pulse width is converted so as to correspond to the normal temperature, the low temperature, or the high temperature state, Are sequentially generated.

The light emitting display according to the present invention and the driving method thereof change the threshold voltage sensing period of the driving transistor for driving the light emitting elements according to the temperature of the light emitting display panel, that is, the threshold voltage stabilization period of the driving transistor . As described above, the present invention can stabilize the threshold voltage of the driving transistor by maintaining the threshold voltage of the driving transistor by using the ambient temperature, thereby improving the image quality of the light emitting display panel.

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a circuit diagram showing a light emitting display according to an embodiment of the present invention. 3 is an equivalent circuit diagram showing one sub-pixel of the light emitting display panel shown in FIG.

The light emitting display device shown in FIG. 2 includes a light emitting display panel 1 having a light emitting element and a pixel driver for driving the light emitting element in each of a plurality of pixel cells PXL arranged in a matrix form. A temperature detection circuit part 6 for detecting the temperature of the light emitting display panel 1 through a temperature sensor TSS provided in the light emitting display panel 1 and a temperature sensor part 6 for detecting the temperature of the light emitting display panel 1, Which changes the threshold voltage sensing period of the driving transistor included in each pixel driver 11, that is, the threshold voltage stabilization period, according to the pulse width of the stabilization control signal GVS, And a driving unit.

The light emitting display panel 1 includes a plurality of data lines DL, gate lines GL1 to GLn, control lines CL1 to CLn, power supply lines PL1 to PLn, So that the image is displayed using the pixel cells PXL. Here, the power supply lines PL1 to PLn are also supplied with an AC drive voltage swinging between a high potential power supply (VDD) and a low potential power supply (GND) or a base voltage source. In this case, the high potential voltage source VDD is supplied to each pixel cell PXL during the address and emission period, and the low potential voltage source GND is supplied to each pixel cell PXL during the initialization period (reset period) .

As shown in FIG. 3, each pixel cell PXL includes a light emitting device OLED and a pixel driving unit 11 that independently drives the light emitting device OLED. Specifically, one pixel cell PXL includes a pixel driving unit 11, a pixel driving unit 11 and a pixel driving unit 11 connected to a gate line GL, a data line DL, a control line CL and a power supply line PL, And a light emitting element (OLED) connected between the low potential voltage source (GND) and equivalently represented by a diode.

The pixel driving part 11 turns on the first and second switching transistors ST1 and ST2 for controlling ON / OFF timing of the light emitting element OLED, the driving transistor DT and the light emitting element OLED for one frame The first and second storage capacitors Cst1 and Cst2.

The first and second switching transistors ST1 and ST2 and the driving transistor DT may be PMOS transistors or NMOS transistors. Here, the first and second transistors ST1 and ST2 and the driving transistor DT shown in FIG. 3 are both NMOS transistors and include an amorphous or polysilicon semiconductor layer.

The first switching transistor ST1 supplies a data signal from the data line DL to the first node N1 in response to a gate-on voltage from the gate line GL, for example, a gate high voltage. To this end, the gate terminal of the first switching transistor ST1 is connected to the gate line GL, the source terminal to the data line DL, and the drain terminal to the first node N1.

The second switching transistor ST2 connects the gate electrode and the drain electrode of the driving transistor DT to each other in response to the stabilization control voltage supplied through the control line CL to connect the driving transistor DT in a diode form. Here, the stabilization control voltage is a voltage input during a period corresponding to the pulse width of the stabilization control signal GVS. For this operation, the gate terminal of the second switching transistor ST2 is connected to the control line CL, the source terminal to the second node N2, and the drain terminal to the third node N3.

The driving transistor DT controls the amount of current flowing to the light emitting element OLED in response to the voltage on the second node N2. To this end, the gate terminal of the driving transistor DT is connected to the second node N2, the source terminal to the third node N3, and the drain terminal to the low potential voltage source VSS.

The first storage capacitor Cst1 is connected between the first and second nodes N1 and N2. The first storage capacitor Cst1 stably maintains the voltages of the second nodes N1 and N2 and prevents the voltages of the first and second nodes N1 and N2 from being mixed with each other.

The second storage capacitor Cst2 is connected between the low potential voltage (VSS) source and the first node N1. This second storage capacitor Cst2 prevents the voltage of the first node N1 from changing when the first switching transistor ST1 is turned off and the first node N1 is brought into a floating state.

The light emitting device OLED includes an anode electrode connected to the power supply line PL, a cathode electrode connected to the pixel driver 114, and an organic light emitting layer formed between the anode electrode and the cathode electrode. The light emitting device OLED emits light by the current from the driving transistor DT of the pixel driver 114. [

2 detects the temperature of the light emitting display panel 1 through a temperature sensor TSS provided in the light emitting display panel 1 and outputs the digital temperature data TVS) and supplies it to the timing control unit 5 described above. More specifically, the temperature detection circuit unit 6 receives the temperature detection signal TS from the temperature sensor TSS of the light emitting display panel 1, digitizes the received temperature detection signal TS, and outputs the temperature data TVS ).

The temperature sensor TSS may be separately formed on the front surface or the back surface of the light emitting display panel 1 and may be formed in the form of a transistor embedded in a video display portion of the light emitting display panel 1 or a non-display portion. The temperature sensor TSS detects the ambient temperature, in particular, the amount of current corresponding to the temperature of the light emitting display panel 1, and supplies the temperature detection circuit 6 with the temperature detection signal TS in accordance with the amount of the current. Then, the temperature detection circuit unit 6 generates the temperature data TVS by analog-to-digital conversion (A / D conversion) of the inputted temperature detection signal TS and supplies it to the timing control unit 5.

The panel driver of the present invention includes a gate driver 2 for driving the gate lines GL1 to GLn and the control lines CL1 to CLn, a data driver 3 for driving the data lines DL1 to DLm, A power supply unit 4 for applying a low potential and a high potential voltage source VDD and GND to the power supply lines PLn to PLm and an RGB data RGB input from the outside to the display panel 1 in size and resolution And a timing controller 5 for controlling the data and gate drivers 3 and 2 by generating data and gate control signals DVS and GVS and supplying the data and gate control signals DVS and GVS to the data driver 3. The timing controller 5 supplies the gate driver 2 with the stabilization control signal GVS having the changed pulse width and the gate driver 2 outputs the stabilization control signal GWS, And a stabilization control voltage having a pulse width equal to the pulse width of the gate control signal GVS, and sequentially supplies the stabilization control voltage to the control lines CL1 to CLn.

The gate driver 2 may be formed in a form embedded in a non-display portion of the light emitting display panel 1, that is, in the form of a gate in panel (GIP). The gate driver 2 includes at least one shift A register, a level shifter, and the like.

One of the shift registers of the gate driving unit 2 configured as described above receives a gate control signal GVS from the timing control unit 5 such as a gate start pulse GSP and a gate shift clock GSC Gate Shift clock), and controls the pulse width of the gate-on signal according to a gate output enable (GOE) signal. Then, the gate-on signals are sequentially supplied to the gate lines GL1 to GLn. Here, the gate-off voltage is supplied during a period in which the gate-on voltage is not supplied to the gate lines GL1 to GLn.

On the other hand, the other shift register of the gate driver 2 shifts the stabilization control signal GVS to which the pulse width is converted and inputted from the timing controller 5 so as to have the same pulse width as the stabilization control signal GVS And sequentially supplies the stabilization control voltage to the control lines CL1 to CLn. The gate-off voltage is supplied during a period in which the stabilization control voltage is not supplied to the control lines CL1 to CLn.

The data driver 3 is connected to the timing controller 5 using a source start pulse SSP and a source shift clock SSC among data control signals DVS from the timing controller 5. [ To the analog voltage, that is, the data voltage. In response to a source output enable (SOE) signal, a data voltage is supplied to each data line DL1 to DLm. Specifically, the data driver 3 latches the extended RGB data (MData) input according to the SSC, and then outputs the horizontal (1) horizontal scanning signal And supplies the data voltages of the lines to the data lines DL1 to DLm.

The power supply unit 4 supplies a high potential voltage source VDD and a low potential voltage source GND to each pixel cell PXL of the light emitting display panel 1. [ Here, the high potential voltage source VDD means a driving voltage for driving the light emitting device OLED, and the low potential voltage source GND means a ground voltage or a base voltage source. Due to the difference between the high potential voltage source VDD and the low potential voltage source GND, a current corresponding to the data signal can flow in each pixel cell PXL.

The timing controller 5 arranges the image data RGB input from the outside in accordance with the size and resolution of the light emitting display panel 1 and supplies the aligned image data Data to the data driver 3. The timing controller 5 generates gate and data control signals GVS and DVS using externally input synchronous signals MCLK, DE, Hsync and Vsync and supplies them to the gate driver 2 and the data driver 3 .

In addition, the timing control section 5 generates the stabilization control signal GVS so as to have a pulse width corresponding to the temperature data TVS, using the digitally converted temperature data TVS input from the temperature detection circuit section 6 . Specifically, the timing control unit 5 analyzes the temperature data TVS from the temperature detection circuit unit 6 to analyze whether the temperature of the light emitting display panel 1 is a room temperature state, a low temperature state, or a high temperature state. At this time, the temperature state of the light emitting display panel 1 is determined by comparing a plurality of preset reference temperature data with the input temperature data TVS and determining whether the temperature data is in a room temperature, a low temperature, or a high temperature according to the comparison result. The timing controller 5 uses the unshown level shifter or the like to adjust the pulse width of the stabilization control signal GVS so as to have a pulse width corresponding to the normal temperature, the low temperature, or the high temperature state of the determined light emitting display panel 1 And supplies it to one of the shift registers of the gate driver 2. [

The threshold voltage Vth of the driving transistor DT provided in each pixel cell PXL of the light emitting display panel 1 varies depending on the temperature state of the light emitting display panel 1, . For example, the threshold voltage Vth2 of the driving transistor HT (DT), which is measured when the light emitting display panel 1 is in a high temperature state of 50 占 폚 or more, Is measured to be lower than the threshold voltage (Vth1) of the driving transistor (LT (DT)). That is, the threshold voltage Vth of the driving transistor DT provided in each pixel cell PXL is measured higher when the light emitting display panel 1 is at a low temperature, and is measured lower when the light emitting display panel 1 is at a high temperature.

The stabilization control signal GVS supplied to the second switching transistor ST2 of the pixel driver 11 according to the temperature state of the light emitting display panel 1 has the pulse width of the stabilization control signal GVS The supply period is adjusted. The second switching transistor ST2 connects the gate electrode and the drain electrode of the driving transistor DT to each other in response to the stabilization control voltage supplied through the control line CL, So that the period during which the threshold voltage Vth is stabilized can be adjusted. Thus, when the driving transistor DT is connected in a diode form, the voltage applied to the driving transistor DT becomes equal to the voltage applied to the first storage capacitor Cst1 and the second node N2 The threshold voltage Vth of the driving transistor DT can be stabilized.

5 is a waveform diagram for explaining a driving method of a light emitting display according to the present invention. 3 will be described with reference to FIG.

The driving period of the light emitting display shown in FIG. 5 is divided into an initializing period T1, a sampling period T2, and an address and light emitting period T4.

In the initialization period T1, a low potential voltage GND or a preset gate low voltage vgl may be supplied to the data line DL and the power supply line PL. Likewise, a low potential voltage (GND) is supplied to the control line (CL), and a gate low voltage (vgl) is supplied to the gate line (GL).

Thus, the first and second switching transistors ST1 and ST2 and the driving transistor DT maintain their turn-off states in response to the gate-low voltage vgl and the low-potential voltage GND. The parasitic capacitor (not shown) of the light emitting device OLED formed between the power supply line PL for maintaining the low potential voltage GND and the third node N3 during the setup period T1, (N3) also maintains the low potential voltage (GND).

The initialization voltage Vini is supplied to the data line DL, the gate high voltage vgh is supplied to the gate line GL and the low potential voltage GND is applied to the power line PL and the control line CL. Is supplied. The initializing voltage Vini is precharged to the data line DL so that the initializing voltage Vini is sufficiently charged to the desired voltage level. The first switching transistor ST1 is turned on in response to the gate high voltage vgh and the second switching transistor ST2 is turned off in response to the low potential voltage GND.

The initializing voltage Vini from the data line DL is supplied to the first node N1 through the first switching transistor ST1 turned on so that the first node N1 is charged to the initializing voltage Vini. At this time, since the voltage of the second node N2 is raised by the first storage capacitor Cst1 between the first and second nodes N1 and N2, the driving transistor DT connected to the second node N2 Turn on. The third node N3 is initialized by supplying the base voltage VSS to the third node N3 through the turned-on driving transistor DT.

The voltage charged in the first storage capacitor Cst1 connected to the drain electrode of the first switching transistor ST1 is lower than the voltage charged in the data line DL because the base voltage or the voltage of OV is supplied to the data line DL at the end of the initialization period T1. And is discharged to 0 V or the ground voltage on line DL.

Next, a base voltage or a low potential voltage source GND is supplied to the power supply line PL and a gate high voltage vgh is supplied to the gate line GL in the sampling period T3. At this time, the stabilization control voltage TVS whose pulse width is changed is supplied to the control line CL. The first stabilization control voltage TVS1 supplied during two horizontal periods 2H is supplied to the control line CL when the temperature of the light emitting display panel 1 is at room temperature, The second stabilization control voltage TVS2 supplied during the 3 horizontal periods 3H may be supplied when the temperature state is low and one horizontal period 1H may be provided when the temperature state of the light emitting display panel 1 is high. The second stabilization control voltage TVS3 may be supplied.

The second switching transistor ST2 is turned on in response to a stabilization control voltage supplied to the control line CL among the first to third stabilization control voltages TVS1, TVS2 and TVS3, The first switching transistor ST1 is also turned on.

The gate terminal and the source terminal of the driving transistor DT are connected to each other through the second switching transistor ST2 turned on according to any one of the stabilization control voltages of the first to third stabilization control voltages TVS1, TVS2 and TVS3. Since the second and third nodes N2 and N3 are short-circuited by the turned-on second switching transistor ST2, the gate terminal and the source terminal of the driving transistor DT become equal to each other and the driving transistor DT is turned on. The threshold voltage of the turned-on driving transistor DT is stored in the second and third nodes N2 and N3.

The high voltage VDD or the high gate voltage vgh is supplied to the power supply line PL and the low potential GND is supplied to the control line CL during the address and light emission period T4.

The gate high voltage vgh is sequentially supplied to the first to nth gate lines GL1 to GLn and the data voltages D1 to Dm are also applied to the first to mth data lines DL1 to DLm. , DN) are sequentially supplied.

On the other hand, the time point when the voltage supplied to the power supply line PL swings from the low potential GND to the high potential VDD is before the gate high voltage vgh is supplied to the first gate line GL1.

The data voltage is charged to the first node N1 through the turned-on first switching transistor ST1. The voltage of the first node N1 charged with the data voltage and the voltage of the second node N2 connected through the first storage capacitor Cst1 rise by the voltage charged in the first node N1. That is, the threshold voltage Vth of the driving transistor DT charged during the sampling period rises to the voltage to which the data voltage supplied to the first node N1 is added to the second node N2. The driving transistors DT are sequentially turned on in the horizontal line unit by the voltage supplied to the second node N2. The turned-on driving transistor DT generates a driving current, and the light emitting element OLED emits light with a luminance corresponding to the magnitude of the driving current.

As described above, the present invention adjusts the supply period of the stabilization control voltage TVS supplied to the second switching transistor ST2 of the pixel driver 11 according to the temperature state of the light emitting display panel 1 do. Since the second switching transistor ST2 connects the gate electrode and the drain electrode of the driving transistor DT in response to the input period of the stabilization control voltage TVS, the threshold voltage Vth of the driving transistor DT is stabilized Can be adjusted.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. Will be clear to those who have knowledge of.

1 is a circuit diagram showing one pixel of a conventional light emitting display device.

2 is a circuit diagram illustrating a light emitting display according to an embodiment of the present invention.

3 is an equivalent circuit diagram showing one sub-pixel of the light emitting display panel shown in FIG.

4 is a graph showing a change in threshold voltage of a driving transistor according to a temperature change.

5 is a waveform diagram for explaining a driving method of a light emitting display according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

1: light emission display panel 2: gate driver

3: Data driver 4: Power supply

5: timing control unit 6: temperature detection circuit unit

TSS: Temperature sensor PXL: Pixel cell

ST1, ST2: first and second switching transistors DT: driving transistor

OLED: Light emitting element

Claims (9)

A light emitting display panel including a light emitting element and a pixel driver for driving the light emitting element in each of a plurality of pixel cells arranged in a matrix form; A temperature detection circuit unit for detecting a temperature of the light emitting display panel through a temperature sensor included in the light emitting display panel; And And a panel driver for generating a stabilization control signal whose pulse width is changed to correspond to the detected temperature and changing a threshold voltage stabilization period of the driving transistor included in each of the pixel driving units according to the generated stabilization control signal, Device. The method according to claim 1, Wherein the pixel driver comprises: A plurality of switching transistors for controlling the on / off timing of the light emitting element; and at least one storage capacitor for keeping the driving transistor and the light emitting element on for one frame, Wherein one of the plurality of switching transistors A gate electrode is connected to one of a plurality of control lines positioned to be parallel to a gate line of the light emitting display panel, And a gate electrode and a drain electrode of the driving transistor are connected to each other in response to a stabilization control voltage input through the control line during a period corresponding to a pulse width of the stabilization control signal, thereby connecting the driving transistor in a diode- . 3. The method of claim 2, Wherein the panel- A gate driver for driving gate lines and control lines of the light emitting display panel, A data driver for driving the data lines of the light emitting display panel, A power supply unit for driving power supply lines of the light emitting display panel, And a timing controller for generating a data and gate control signal to control the data and gate driver and generating a stabilization control signal having a changed pulse width and supplying the generated stabilization control signal to the gate driver. The method of claim 3, The timing control unit The temperature of the light emitting display panel is determined by analyzing the temperature data from the temperature detection circuit unit to determine whether the light emitting display panel is at a room temperature, a low temperature, or a high temperature, Wherein the control signal is generated by changing the pulse width of the control signal and supplied to a shift register of the gate driver. 5. The method of claim 4, The other shift register of the gate driver includes: And sequentially generates the stabilization control voltage so as to have a pulse width equal to the pulse width of the stabilization control signal by sequentially shifting the stabilization control signal to which the pulse width is converted and inputted to sequentially supply the stabilization control voltage to the control lines. A method of driving a light emitting display device including a light emitting display panel including a light emitting element and a pixel driver for driving the light emitting element in each of a plurality of pixel cells arranged in a matrix, Detecting a temperature of the light emitting display panel through a temperature sensor included in the light emitting display panel; Generating a stabilization control signal whose pulse width is changed to correspond to the detected temperature; And And changing the threshold voltage stabilization period of the driving transistor included in each of the pixel driving units according to the generated stabilization control signal. The method according to claim 6, Wherein the step of changing the threshold voltage stabilization period of the driving transistor comprises: Generating a stabilization control voltage input during a period corresponding to the pulse width of the stabilization control signal, and Wherein the driving transistor is connected in a diode form by connecting the gate electrode and the drain electrode of the driving transistor to each other in response to the stabilization control voltage. 8. The method of claim 7, Wherein the step of generating the stabilization control signal, Analyzing the temperature of the light emitting display panel to determine whether the light emitting display panel is at a normal temperature, a low temperature, or a high temperature; Generating a stabilization control signal having a pulse width corresponding to a normal temperature, a low temperature, or a high temperature state of the light-emitting display panel; 9. The method of claim 8, Wherein the step of generating the stabilization control voltage comprises: Wherein the stabilization control signal is generated by sequentially shifting a stabilization control signal having a pulse width converted to correspond to the normal temperature, the low temperature, or the high temperature state, thereby to have the same pulse width as the stabilization control signal, Driving method.

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