KR101756665B1 - Organic light emitting diode display device and method for driving the same - Google Patents

Abstract

The present invention relates to an organic light emitting diode (OLED) display device and a method of driving the organic light emitting diode display device capable of preventing a data voltage loss when driving a data MUX to improve display quality. The OLED display device is characterized by defining pixels at intersections of a plurality of data lines and a plurality of gate lines Display panel; A timing controller for outputting a plurality of gate control signals and a plurality of data control signals; A gate driver for generating a plurality of gate signals including scan signals according to the plurality of gate control signals and supplying the gate signals to the plurality of gate lines; A data driver for generating a data voltage according to the plurality of data control signals and supplying the generated data voltage to a plurality of channel lines; And a switching unit for switching the data voltages provided from the plurality of channel lines and alternately supplying the switched data voltages to odd-numbered data lines and even-numbered data lines; And the pixels neighboring in the horizontal direction receive the scan signals independently of each other.

Description

Technical Field [0001] The present invention relates to an organic light emitting diode (OLED) display device,

The present invention relates to an organic light emitting diode (OLED) display device and a driving method thereof that can prevent a data voltage loss and improve display quality when driving a data MUX.

2. Description of the Related Art [0002] Organic light emitting diodes (OLED) display devices for displaying images by controlling the amount of light emitted from an organic light emitting layer have been spotlighted by a flat panel display capable of reducing weight and volume, which are disadvantages of a cathode ray tube (CRT) .

An OLED display device defines pixel regions at the intersection of a plurality of gate lines and a plurality of data lines. The pixel region includes a pixel driver for independently driving the OLED and the OLED, and the pixel driver includes a plurality of thin film transistors (TFTs) and at least one capacitor. In this pixel driver, control signals for controlling a plurality of TFTs are provided from a plurality of gate lines, and a data voltage is provided from a plurality of data lines.

In general, the pixel driver is largely divided into an initialization period, a period for programming the data voltage, a period for sensing the threshold voltage of the driving TFT, and a light emission period for supplying the driving current to the OLED through the driving TFT.

On the other hand, in order to reduce the number of data accumulation circuits, a data MUX for switching the data voltages output from the data integration circuit in a time division manner and alternately supplying the switched data voltages to the odd-numbered data lines and the even- Drive technology "has been introduced.

The OLED display device to which the data MUX driving technique is applied has a period for charging the data voltage to odd-numbered data lines and even-numbered data lines before the initialization period of the pixel driver. When a data voltage is charged to each data line in this period, each data line has a data voltage and remains in a floating state. At this time, the data voltage held in the floating state is supplied to the pixel driving section in a period of programming the data voltage.

However, there is a problem in that the data voltage charged and floated on each data line is lost due to the current path to the pixel driver during the initialization period (before the programming of the data voltage). As described above, when a data voltage loss occurs in the data line, the data voltage actually programmed in the pixel driver is different from the intended voltage, which causes display quality degradation.

It is an object of the present invention to provide an organic light emitting diode (OLED) display device and a driving method thereof, which can improve display quality by preventing data voltage loss when driving a data MUX.

According to another aspect of the present invention, there is provided an organic light emitting diode display comprising: a display panel defining pixels at intersections of a plurality of data lines and a plurality of gate lines; A timing controller for outputting a plurality of gate control signals and a plurality of data control signals; A gate driver for generating a plurality of gate signals including scan signals according to the plurality of gate control signals and supplying the gate signals to the plurality of gate lines; A data driver for generating a data voltage according to the plurality of data control signals and supplying the generated data voltage to a plurality of channel lines; And a switching unit for switching the data voltages provided from the plurality of channel lines and alternately supplying the switched data voltages to odd-numbered data lines and even-numbered data lines; And the pixels neighboring in the horizontal direction receive the scan signals independently of each other.

A first switch for supplying the data voltage provided from the plurality of channel lines to the odd-numbered data lines in response to a first switching signal; And a second switch for supplying the data voltage provided from the plurality of channel lines to the even-numbered data lines in response to a second switching signal; The first and second switching signals are sequentially output in a 1/2 horizontal period.

The pixel includes a driving switching element for supplying a driving current to the organic light emitting diode according to a potential of a second node; A first switching device for supplying the data voltage to the first node in response to the scan signal; A second switching element for supplying a reference voltage to the first node in response to the light emitting signal; A third switching element for connecting the drain electrode of the driving switching element and the second node to each other in response to the scan signal; A fourth switching element for connecting the drain electrode and a third node connected to the anode electrode of the organic light emitting diode in response to the emission signal; A fifth switching element for supplying the reference voltage to the third node in response to an initialization signal; And a capacitor connected between the first node and the second node.

Wherein the scan signal includes a first scan signal for scanning a pixel connected to the odd data line and a second scan signal for scanning a pixel connected to the even data line, And the scan signals are sequentially output in units of 1/2 horizontal periods.

Wherein the organic light emitting diode display device comprises: a first period during which the first switch signal, the first scan signal, the emission signal, and the initialization signal are output; A second period during which the first switch signal, the first scan signal, and the initialization signal are output; A third period during which the second switch signal, the second scan signal, the emission signal, and the initialization signal are output; A fourth period during which the second switch signal, the second scan signal, and the initialization signal are output; And a fifth period during which the light emission signal is output.

According to another aspect of the present invention, there is provided a method of driving an organic light emitting diode display, including: generating a plurality of gate signals including a scan signal and supplying the gate signals to a plurality of gate lines; Generating and supplying a data voltage to a plurality of channel lines; Switching the data voltages provided from the plurality of channel lines and alternately supplying the switched data voltages to odd-numbered data lines and even-numbered data lines; And independently applying the scan signals to neighboring pixels in the horizontal direction.

Wherein the switching of the data voltage comprises: supplying the data voltage provided from the plurality of channel lines to the odd-numbered data lines in response to a first switching signal; And supplying the data voltage provided from the plurality of channel lines to the even-numbered data lines in response to a second switching signal; The first and second switching signals are sequentially output in a 1/2 horizontal period.

The pixel includes a driving switching element for supplying a driving current to the organic light emitting diode according to a potential of a second node; A first switching device for supplying the data voltage to the first node in response to the scan signal; A second switching element for supplying a reference voltage to the first node in response to the light emitting signal; A third switching element for connecting the drain electrode of the driving switching element and the second node to each other in response to the scan signal; A fourth switching element for connecting the drain electrode and a third node connected to the anode electrode of the organic light emitting diode in response to the emission signal; A fifth switching element for supplying the reference voltage to the third node in response to an initialization signal; And a capacitor connected between the first node and the second node.

Wherein the scan signal includes a first scan signal for scanning a pixel connected to the odd data line and a second scan signal for scanning a pixel connected to the even data line, And the scan signals are sequentially output in units of 1/2 horizontal periods.

Outputting the first switch signal, the first scan signal, the emission signal, and the initialization signal; Outputting the first switch signal, the first scan signal, and the initialization signal; Outputting the second switch signal, the second scan signal, the emission signal, and the initialization signal; Outputting the second switch signal, the second scan signal, and the initialization signal; And outputting the light emission signal.

The present invention can prevent the data voltage loss in driving the data MUX and improve the display quality and increase the time for sensing the threshold voltage Vth of the driving TFT DT so that the threshold voltage Vth of the driving TFT DT ) Can be sensed more accurately.

1 is a configuration diagram of an OLED display device according to an embodiment of the present invention.
Fig. 2 is a configuration diagram of the switching unit 10 shown in Fig.
3 is a configuration circuit diagram of the pixels P1 and P2 shown in Fig.
4 is a driving waveform diagram of the OLED display shown in FIG.
FIG. 5 is a simulation comparing the change in aperture ratio with the addition of a scan signal (SCAN) supply line.
6 is a configuration diagram of an OLED display device according to a comparative example.
7 is a driving waveform diagram of the comparative example shown in Fig.

Hereinafter, an organic light emitting diode display according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, the TFT may be configured as a P type or an N type, and in the embodiment, the TFT is configured as a P type for convenience of explanation. Thus, the gate high voltage VGH is a voltage for turning off the TFT, and the gate low voltage VGL is a voltage for turning on the TFT. In describing a pulse-shaped signal, the gate high voltage (VGH) state is defined as "high state", and the gate low voltage (VGL) state is defined as "low state".

1 is a configuration diagram of an OLED display device according to an embodiment of the present invention.

The OLED display device shown in FIG. 1 includes a display panel 2 defining a plurality of data lines DL and pixels P1 and P2 at intersections of a plurality of gate lines GL, a plurality of gate control signals GCS, A plurality of gate lines GL including scan signals SCAN1 and SCAN2 in accordance with a plurality of gate control signals GCS, A data driver 6 for generating a data voltage Vdata according to a plurality of data control signals DCS and supplying the data voltage Vdata to a plurality of channel lines CL, And a switching unit 10 for switching the provided data voltage Vdata and alternately supplying the switched data voltage Vdata to the odd-numbered data line DL_odd and the even-numbered data line DL_even.

The embodiment of the present invention is characterized in that the neighboring pixels P1 and P2 in the horizontal direction are independently supplied with the scan signals SCAN1 and SCAN2. Accordingly, it is possible to prevent the data voltage loss when driving the data MUX, thereby improving the display quality. Before describing the components, the components shown in FIG. 1 will be briefly described.

The timing controller 8 arranges image data (RGB) input from the outside in accordance with the size and resolution of the display panel 2 and supplies the image data to the data driver 6. The timing controller 8 receives a plurality of synchronization signals (e.g., a dot clock DCLK, a data enable signal DE, a horizontal synchronization signal Hsync, and a vertical synchronization signal Vsync) And supplies the gate control signal GCS and the data control signal DCS to the gate driver 4 and the data driver 6, respectively.

The gate driving unit 4 receives a gate control signal GCS from the timing control unit 8 in response to a plurality of clock pulses, a gate start pulse, a gate shift clock, Generates a gate signal and supplies it to the gate line GL. Here, the plurality of gate signals include the scan signals SCAN1 and SCAN2 and the emission signal EM. The scan signals SCAN1 and SCAN2 include a first scan signal SCAN1 for scanning an odd pixel P1 connected to an odd data line DL_odd and a first scan signal SCAN1 for scanning an odd pixel P1 connected to an even data line DL_even And a second scan signal (SCAN2) for scanning the second scan signal (P2). The first and second scan signals SCAN1 and SCAN2 are sequentially output in a 1/2 horizontal period H (see FIG. 4).

 On the other hand, the gate driver 4 may be embedded in the display panel 2 in a gate-in-panel manner.

The data driver 6 receives the data input from the timing controller 8 using a source start pulse and a source shift clock of the data control signal DCS from the timing controller 8, Converts the data (RGB) into the data voltage (Vdata). The data driver 6 supplies the converted data voltage Vdata to the plurality of channel lines CL in response to a source output enable signal.

Fig. 2 is a configuration diagram of the switching unit 10 shown in Fig.

2 includes a first switch SW1 for supplying the data voltage Vdata provided from the channel line CL to the odd-numbered data line DL_odd in response to the first switching signal MUX1, And a second switch SW2 for supplying the data voltage Vdata provided from the channel line CL to the even-numbered data line DL_even in response to the second switching signal MUX2. Here, the first and second switching signals MUX1 and MUX2 for controlling the switching unit 10 are sequentially output in a 1/2 horizontal period (H) (see FIG. 4).

3 is a configuration circuit diagram of the pixels P1 and P2 shown in Fig.

The pixels P1 and P2 shown in FIG. 3 include a pixel driver for independently driving the OLED and the OLED.

Specifically, the pixel driver includes first to fifth TFTs T1 to T5, a driving TFT DT, and a capacitor C. The OLED is connected between the pixel driving part and the low potential driving voltage (VSS) supply line and is equivalently represented by a diode.

The pixel driving section is supplied with a gate signal SCAN, EM, and INIT for controlling the data voltage Vdata, the reference voltage Vref, the high potential driving voltage VDD, and the first to fifth TFTs T1 to T5, Is supplied.

Here, the high-potential driving voltage VDD has a potential that is relatively higher than the low-potential driving voltage VSS. The low potential driving voltage VSS can be set to the ground voltage. The reference voltage Vref has a potential between the high potential driving voltage VDD and the low potential driving voltage VSS. The plurality of gate signals SCAN, EM, and INIT include a scan signal SCAN, a light emission signal EM, and an initialization signal INIT.

The first TFT T1 supplies the data voltage Vdata to the first node N1 in response to the scan signal SCAN. Here, the first node N1 is a node to which the output terminals of the first TFT T1 and the second TFT T2 are commonly connected.

The second TFT T2 supplies the reference voltage Vref to the first node N1 in response to the emission signal EM.

The third TFT T3 connects the drain electrode d of the driving TFT DT and the second node N2 to each other in response to the scan signal SCAN. Here, the second node N2 is a node connected to the gate electrode g of the driving TFT DT. Further, the third TFT T3 may be formed in a dual gate structure to reduce a high-temperature leakage current when the OLED emits light.

The fourth TFT T4 connects the drain electrode d of the driving TFT DT and the third node N3 to each other in response to the emission signal EM. Here, the third node N3 is a node connected to the anode electrode of the OLED.

The fifth TFT T5 supplies the reference voltage Vref to the third node N3 in response to the initialization signal INIT.

The driving TFT DT adjusts the amount of emitted light of the OLED by controlling the amount of current supplied to the OLED in accordance with the potential of the second node N2 supplied with the high potential driving voltage VDD to the source electrode s.

The capacitor C is connected between the first node N1 and the second node N2.

The OLED is composed of an anode electrode connected to the pixel driving unit, a cathode electrode supplied with a low potential driving voltage (VSS), and an organic layer formed between the anode electrode and the cathode electrode.

Hereinafter, a method of driving the pixels P1 and P2 including the pixel driver will be described in detail.

4 is a driving waveform diagram of the OLED display shown in FIG.

In FIG. 4, reference numeral " 1 " denotes an initialization period (hereinafter referred to as a first period) of an odd pixel P1, 2 denotes a programming of a odd pixel P2 and a threshold voltage sensing period The programming period of the even pixel P2 and the threshold voltage sensing period (hereinafter referred to as the fourth period), and the period of the light emission of the odd and even pixels P1 and P2 (hereinafter, Fifth period).

In the first period (1), the first switching signal MUX1, the first scan signal SCAN1, the emission signal EM, and the initialization signal INIT are outputted in a low state; The second switching signal MUX2 and the second scan signal SCAN2 are outputted in a high state.

Then, the first switch SW1 is turned on to supply the data voltage Vdata to the odd-numbered data line DL_odd. The first to fifth TFTs T1 to T5 are turned on in the odd pixel P1 so that the first and second nodes N1 and N2 are initialized to the reference voltage Vref.

At this time, the first TFT T1 is turned on to form a current path from the odd-numbered data line DL_odd to the odd-numbered pixel P1, but the loss of the data voltage Vdata in the odd-numbered data line DL_odd is Is not generated. This is because the first switch SW1 continuously supplies the data voltage Vdata to the odd-numbered data line DL_odd.

In the second period (2), the first switching signal MUX1, the first scan signal SCAN1, and the initialization signal INIT are outputted in a low state; The second switching signal MUX2, the second scan signal SCAN2, and the emission signal EM are outputted in a high state.

Then, the first switch SW1 is continuously turned on to supply the data voltage Vdata to the odd-numbered data line DL_odd. And the data voltage Vdata of the odd-numbered data line DL_odd is supplied to the first node N1 of the odd-numbered pixel P1.

Accordingly, in the second period (2), the odd pixel P1 can receive the data voltage Vdata whose distortion due to the voltage loss is minimized. Accordingly, the embodiment of the present invention can prevent the deterioration of the image quality due to the distortion of the data voltage (Vdata) applied to the odd-numbered pixels P1, thereby improving the display quality.

On the other hand, in the second period (2), the odd pixel P1 senses the threshold voltage Vth of the driving TFT DT. Specifically, in the second period (2), the fourth TFT T4 is turned off in the odd pixel P1, and the current flowing in the driving TFT DT flows into the second node N2. The potential of the second node N2 is set such that the potential difference between the gate electrode g and the source electrode s of the driving TFT DT is lower than the potential of the driving TFT DT And rises until it reaches the threshold voltage (Vth).

That is, when the potential of the second node N2 converges to VDD + Vth from the reference voltage Vref in the second period (2) and the potential of the second node N2 becomes VDD + Vth, The TFT DT is turned off.

In the third period (3), the second switching signal MUX2, the second scan signal SCAN2, the emission signal EM, and the initialization signal INIT are outputted in a low state; The first switching signal MUX1 and the first scan signal SCAN1 are outputted in a high state.

Then, the first switch SW1 is turned off and the second switch is turned on to supply the data voltage Vdata to the even-numbered data line DL_even. The first to fifth TFTs T1 to T5 are turned on so that the first and second nodes N1 and N2 are initialized to the reference voltage Vref.

At this time, the first TFT T1 is turned on to form a current path from the even-numbered data line DL_even to the even-numbered pixel P2, but the loss of the data voltage Vdata in the even-numbered data line DL_even Is not generated. This is because the second switch SW2 continuously supplies the data voltage Vdata to the even-numbered data line DL_even.

In the fourth period (4), the second switching signal MUX2, the second scan signal SCAN2, and the initialization signal INIT are outputted in a low state; The first switching signal MUX1, the first scan signal SCAN1, and the emission signal EM are outputted in a high state.

Then, the second switch SW2 is continuously turned on to supply the data voltage Vdata to the even-numbered data line DL_even. And the data voltage Vdata of the even-numbered data line DL_even is supplied to the first node N1 of the even-numbered pixels P2.

Accordingly, in the fourth period (4), the even-numbered pixel P2 can receive the data voltage Vdata whose distortion due to the voltage loss is minimized. Accordingly, the embodiment of the present invention can prevent degradation in image quality due to distortion of the data voltage (Vdata) applied to the even-numbered pixels P2, thereby improving the display quality.

On the other hand, in the fourth period (4), the even-numbered pixel P2 senses the threshold voltage Vth of the driving TFT DT, Is the same as the method of sensing the threshold voltage Vth.

In the fifth period (5), the light emission signal EM is outputted in a low state; The first and second switching signals MUX1 and MUX2 and the first and second scan signals SCAN1 and SCAN2 and the initialization signal INIT are outputted in a high state.

Then, the first and second switches SW1 and SW2 are turned off, and the odd-numbered pixel P1 and the even-numbered pixel P2 neighboring in the horizontal direction simultaneously emit light. Since the operation of emitting the odd pixel P1 and the even pixel P2 in the fifth period (5) is the same, only the operation of the odd pixel P1 will be described below.

In the fifth period (⑤), the odd-numbered pixels P1 are turned on when the second and fourth TFTs T2 and T4 are turned on and the first, third and fifth TFTs T1, T3 and T5 are turned off do. Thus, the reference voltage Vref is supplied to the first node N1 through the fourth TFT T4. At this time, if the potential of the first node N1 changes from the data voltage Vdata to the reference voltage Vref, the potential of the second node N2 becomes "VDD + Vth" due to the coupling phenomenon of the capacitor C, Quot; VDD + Vth + {C1 / (C1 + C _TFT )} x (Vref-Vdata) " Here, "C1" represents the capacitance of the first capacitor (C), and "C _TFT " represents the parasitic capacitance of the driver TFT (DT). At this time, since the fourth TFT T4 is turned on, a driving current is supplied to the OLED, and the OLED emits light.

Specifically, " Vgs "represents a potential difference between the gate electrode g and the source electrode s of the driving TFT DT, and" Vth " Represents a threshold voltage of the driving TFT DT, and "? &Quot; represents a constant value determined by the mobility of the driving TFT DT and the parasitic capacitance.

Accordingly, the OLED driving current is summarized as shown in Equation (2).

Referring to Equation 2, it can be seen that the OLED driving current is not influenced by the threshold voltage Vth of the driving TFT DT and the high potential driving voltage VDD.

Therefore, the embodiment of the present invention compensates for the change of the threshold voltage Vth of the driving TFT DT and the change of the high-potential driving voltage VDD due to the deterioration that may be generated during the manufacturing process or the image display, It is possible to provide brightness and improve display quality.

On the other hand, in the embodiment, the number of scan signal (SCAN) supply lines is increased in order to independently apply the scan signal (SCAN) to the neighboring pixels (P1, P2) in the transverse direction, but the decrease in the aperture ratio is small.

More specifically, FIG. 5 is a simulation comparing the change in aperture ratio with the addition of the scan signal (SCAN) supply line.

Referring to FIG. 5, when the scan signal SCAN supply line is added according to the embodiment, the aperture ratio reduction is about 1.5% (29.3% -> 27.8%), which is a negligible value.

On the other hand, the embodiment of the present invention can sufficiently secure the threshold voltage (Vth) sensing time of the driving TFT DT and accurately sense the threshold voltage (Vth) of the driving TFT (DT).

Hereinafter, the effect of the embodiment of the present invention (the increase in the threshold voltage (Vth) sensing time of the driving TFT DT) will be examined through a comparative example in which the pixels adjacent in the horizontal direction are all supplied with the same scan signal.

6 is a configuration diagram of an OLED display device according to a comparative example. And Fig. 7 is a driving waveform diagram of the comparative example shown in Fig.

The comparison example shown in FIG. 6 differs from the embodiment of FIG. 1 in that the neighboring pixels P1 and P2 in the transverse direction are all given the same scan signal SCAN.

As shown in FIG. 7, the comparative example includes an A period (a) for charging the odd data line DL_odd with a data voltage (Vdata) in response to the first switching signal MUX1, a second switching signal A B period (b) for charging the data voltage Vdata to the even-numbered data line DL_even in response to the MUX2, a C period (c) for initializing each of the pixels P1 and P2, A period D for programming the data voltage Vdata and sensing the threshold voltage of the driving TFT DT and an E period E for the pixels P1 and P2 to emit light.

If the OLED display according to the comparative example has a full HD resolution (1920 x 1080) and is driven at 60 Hz, one horizontal period (H) becomes about 15.4 us. On the other hand, the time required to charge the data voltage Vdata to each data line DL is affected by the output characteristics of the data driver 6, which is about 5 us. Therefore, when the data voltage Vdata is alternately charged to the odd-numbered data line DL_odd and the even-numbered data line DL, about 10 us is required. That is, the lengths of the A and B periods are about 10 us.

Therefore, the OLED display according to the comparative example has a period (C) in which each pixel (P1, P2) initializes during 5.4 us except for the A and B periods at 15.4 us which is one horizontal period (H) (D) of sensing the threshold voltage (Vth)

On the other hand, the embodiment of the present invention does not need to have a period for separately charging the data line DL, as shown in Fig. Therefore, in the case of the odd-numbered pixel P1, the initialization period (1) and the period (2) for sensing the threshold voltage (Vth) of the driving TFT (DT) And the period (4) for sensing the threshold voltage (Vth) of the driving TFT (DT) during the initialization period (3) for about 7.7 us period in which the even pixel (P2) is also the 1/2 horizontal period (H).

Thus, in the embodiment of the present invention, the initialization period (2) and the period (3) for sensing the threshold voltage of the driving TFT (DT) are increased by about 42% (5.4 us -> 7.7 us) Able to know. This means that the sensing time of the threshold voltage (Vth) of the driving TFT DT is increased by about 42% even though the same driving method is 60 Hz.

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.

SCAN1: first scan signal SCAN2: second scan signal

Claims (10)

A display panel that defines pixels at intersections of a plurality of data lines and a plurality of gate lines;
A timing controller for outputting a plurality of gate control signals and a plurality of data control signals;
And a second scan signal for scanning a pixel connected to an odd-numbered data line and a first scan signal for scanning a pixel connected to the odd-numbered data line according to the plurality of gate control signals, and a second scan signal for scanning pixels connected to the even- A gate driver for generating a plurality of gate signals, each of which includes a scan signal, a scan signal, and a reset signal, the scan signal being sequentially output in units of 1/2 horizontal periods independently of each other;
A data driver for generating a data voltage according to the plurality of data control signals and supplying the generated data voltage to a plurality of channel lines; And
A first switch for supplying the data voltage to the odd-numbered data lines in response to a first switching signal, and a second switch for supplying the data voltage to the even-numbered data lines in response to a second switching signal, And a switching unit for switching the data voltages supplied from the plurality of channel lines and alternately supplying the switched data voltages to odd-numbered data lines and even-numbered data lines, respectively, by 1/2 horizontal periods; And
A first period during which the first switching signal, the first scan signal, the emission signal, and the initialization signal are output;
A second period during which the first switching signal, the first scan signal, and the initialization signal are output;
A third period during which the second switching signal, the second scan signal, the emission signal, and the initialization signal are output;
A fourth period during which the second switching signal, the second scan signal, and the initialization signal are output; And
And a fifth period during which the emission signal is output.
delete The method according to claim 1,
The pixel
A driving switching element supplying a driving current to the organic light emitting diode according to the potential of the second node;
A first switching device for supplying the data voltage to the first node in response to the scan signal;
A second switching element for supplying a reference voltage to the first node in response to the light emitting signal;
A third switching element for connecting the drain electrode of the driving switching element and the second node to each other in response to the scan signal;
A fourth switching element for connecting a drain electrode of the driving switching element and a third node connected to the anode electrode of the organic light emitting diode in response to the light emitting signal;
A fifth switching element for supplying the reference voltage to the third node in response to an initialization signal; And
And a capacitor connected between the first node and the second node.

delete delete And a second scan signal for scanning a pixel connected to the odd-numbered data line and a pixel connected to the odd-numbered data line, and a second scan signal for scanning pixels connected to the even-numbered data line, Generating a plurality of gate signals including a scan signal, a light emission signal, and an initialization signal, the plurality of gate signals sequentially outputting the plurality of gate signals periodically;
Generating and supplying a data voltage to a plurality of channel lines; And
Numbered data lines in response to a first switching signal and supplies the data voltages from the plurality of channel lines to supply the data voltages to the even-numbered data lines in response to a second switching signal And sequentially alternately supplying the switched data voltages to odd-numbered data lines and even-numbered data lines, respectively, by 1/2 horizontal periods,
Outputting the first switching signal, the first scan signal, the emission signal, and the initialization signal;
Outputting the first switching signal, the first scan signal, and the initialization signal;
Outputting the second switching signal, the second scan signal, the emission signal, and the initialization signal;
Outputting the second switching signal, the second scan signal, and the initialization signal; And
And driving the organic light emitting diode display through the step of outputting the light emitting signal.
delete The method according to claim 6,
The pixel
A driving switching element supplying a driving current to the organic light emitting diode according to the potential of the second node;
A first switching device for supplying the data voltage to the first node in response to the scan signal;
A second switching element for supplying a reference voltage to the first node in response to the light emitting signal;
A third switching element for connecting the drain electrode of the driving switching element and the second node to each other in response to the scan signal;
A fourth switching element for connecting a drain electrode of the driving switching element and a third node connected to the anode electrode of the organic light emitting diode in response to the light emitting signal;
A fifth switching element for supplying the reference voltage to the third node in response to an initialization signal; And
And a capacitor connected between the first node and the second node.
delete delete

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