KR102681064B1 - Organic light emitting diode display device - Google Patents

Abstract

The present invention relates to an organic light emitting display device driven by a double rate driving (DRD) method and a method of driving the same, comprising: an organic light emitting display panel in which a plurality of subpixels defined by a plurality of data lines and a plurality of gate lines are arranged; a data driver driving the plurality of data lines; and a gate driver that drives the plurality of gate lines, wherein the nth subpixel among the plurality of subpixels shares one data line and one reference voltage line with the adjacent n+1th subpixel. One data can be shared by two adjacent sub-pixels to drive them sequentially, and one reference voltage can be shared by two adjacent sub-pixels to sense the characteristic values of the circuit elements of the sub-pixels. The DRD driving type organic light emitting display device and its driving method according to an embodiment can reduce the number of transistors included in each subpixel and sequentially provide scan signals and sensing signals through one gate line.

Description

Organic light emitting display device and method of driving the same {Organic light emitting diode display device}

The present invention relates to an organic light emitting display device and a driving method thereof, and more specifically, to an organic light emitting display device driven by a double rate driving (DRD) method and a driving method thereof.

Flat panel displays (FPD) are used in various types of electronic products, including mobile phones, tablet PCs, and laptops. Flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), organic light emitting displays (OLEDs), and more recently, electrophoretic displays. (EPD: ELECTROPHORETIC DISPLAY) is also widely used.

Liquid crystal displays (LCDs) are devices that display images using the optical anisotropy of liquid crystals, and are widely used because they have advantages such as thinness, small size, low power consumption, and high image quality.

Organic light emitting display devices are attracting attention as next-generation flat panel displays because they have a high-speed response time of 1 ms or less, low power consumption, and do not have problems with viewing angles because they emit light themselves. .

This organic light emitting display device arranges subpixels containing organic light emitting diodes in a matrix form and controls the brightness of the subpixels selected by a scan signal according to the gradation of data.

In such an organic light emitting display panel, each subpixel includes an organic light emitting diode and a driving transistor for driving the organic light emitting diode.

Meanwhile, as the driving time of the organic light emitting display panel increases, degradation of the organic light emitting diode and driving transistor disposed in each subpixel of the organic light emitting display panel may progress.

Depending on the driving of each subpixel of the organic light emitting display panel, the unique characteristics of the organic light emitting diode and driving transistor disposed in each subpixel may change.

The driving time for each subpixel may be different, and because of this, the degree of deterioration of the organic light-emitting diode and driving transistor disposed in each subpixel may also be different. For this reason, the circuit elements (organic light-emitting diode) disposed in each subpixel may vary. , driving transistors), a deviation in characteristic values may occur.

This variation in characteristic values between circuit elements of subpixels can be a major factor in significantly deteriorating image quality by causing luminance variation between subpixels.

The purpose of the present invention is to provide an organic light emitting display device and a method of driving the same, in which two adjacent subpixels share one data line and are sequentially driven.

Another object of the present invention is to provide an organic light emitting display device and a driving method thereof that can reduce the number of transistors included in a subpixel.

Another object of the present invention is to provide an organic light emitting display device and a driving method thereof that sequentially provide scan signals and sensing signals through one gate line.

An organic light emitting display device according to the present invention for achieving this purpose includes an organic light emitting display panel in which a plurality of subpixels defined by a plurality of data lines and a plurality of gate lines are arranged; a data driver driving the plurality of data lines; and a gate driver that drives the plurality of gate lines, wherein the nth subpixel (n is an odd number among natural numbers) among the plurality of subpixels is connected to the adjacent n+1th subpixel, one data line, and one reference line. It is characterized by sharing a voltage line.

A detailed feature of the organic light emitting display device according to the present invention is that the plurality of subpixels include organic light emitting diodes and a first transistor for driving the organic light emitting diode, and a space between the gate electrode of the first transistor and the data line is provided. It consists of a second transistor that is electrically connected.

Another detailed feature of the organic light emitting display device according to the present invention is that the nth subpixel and the n+1th subpixel share one reference voltage line to sense the threshold voltage of the first transistor.

Another detailed feature of the organic light emitting display device according to the present invention is that the nth subpixel and the n+1th subpixel share one reference voltage line to sense the threshold voltage of the organic light emitting diode.

Another detailed feature of the organic light emitting display device according to the present invention is that the gate driver sequentially supplies a sensing signal and a scan signal through the first electrode of the second transistor.

In a preferred embodiment of the organic light emitting display device according to the present invention, the second electrode of the second transistor is connected to the data line, and the third electrode is connected to the reference voltage line.

In a preferred embodiment of the organic light emitting display device according to the present invention, the second electrode of the second transistor is connected between the first transistor of an adjacent subpixel and the organic light emitting diode.

In a preferred embodiment of the organic light emitting display device according to the present invention, a capacitor is included between the third electrode of the second transistor and the organic light emitting diode.

In the method of driving an organic light emitting display device according to the present invention, the nth subpixel (n is an odd number among natural numbers) includes an adjacent n+1th subpixel and a subpixel that shares one data line and one reference voltage line. A method of driving an organic light emitting display device comprising: outputting a scan signal for driving an n-th subpixel and a sensing signal for sensing characteristic values of a circuit element of the n-th subpixel using one signal line; It is characterized in that it includes the step of outputting a scan signal signal for driving the adjacent n+1th subpixel and a sensing signal for sensing the characteristic value of the circuit element of the n+1th subpixel using one signal line. .

The method of driving an organic light emitting display device according to the present invention is characterized by sensing the threshold voltage of a driving transistor included in a subpixel or the threshold voltage of an organic light emitting diode.

The organic light emitting display device and its driving method according to the present invention can exhibit the following effects.

First, one data line can be shared by two adjacent subpixels and driven sequentially.

Second, the number of transistors included in a subpixel can be reduced.

Third, scan signals and sensing signals can be provided sequentially through one gate line.

Figure 1 is a schematic system configuration diagram of the organic light emitting display device 100 according to the present embodiments.
Figure 2 is an exemplary diagram of a subpixel circuit of an organic light emitting display device driven by the DRD method according to an embodiment of the present invention.
FIGS. 3A to 3D are exemplary diagrams showing scanning and sensing operations of a subpixel having the configuration of FIG. 2 .
Figure 4 is a circuit diagram showing the configuration of a unit subpixel of an organic light emitting display device according to another embodiment of the present invention.
FIGS. 5A to 5F are exemplary diagrams illustrating signal flows of a scanning operation and a sensing operation of each subpixel of the subpixel having the configuration of FIG. 4 .

With respect to the embodiments of the present invention disclosed in the text, specific structural and functional descriptions are merely illustrative for the purpose of explaining the embodiments of the present invention, and the embodiments of the present invention may be implemented in various forms and are not included in the text. It should not be construed as limited to the described embodiments.

Since the present invention can be subject to various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms such as first, second, etc. may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be referred to as a second component, and similarly, the second component may be referred to as a first component without departing from the scope of the present invention.

When a component is said to be “connected” or “connected” to another component, it is understood that it may be directly connected or connected to the other component, but that other components may exist in between. It should be. On the other hand, when a component is referred to as being “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between. Other expressions that describe the relationship between components, such as "between" and "immediately between" or "neighboring" and "directly adjacent to" should be interpreted similarly.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprises” or “has” are intended to designate the presence of a disclosed feature, number, step, operation, component, part, or combination thereof, and are intended to indicate the presence of one or more other features or numbers, It should be understood that this does not exclude in advance the possibility of the presence or addition of steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as indicating meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an idealized or excessively formal sense. No.

Meanwhile, if an embodiment can be implemented differently, functions or operations specified within a specific block may occur differently from the order specified in the flowchart. For example, two consecutive blocks may actually be performed substantially simultaneously, or the blocks may be performed in reverse depending on the functions or operations involved.

Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings.

Figure 1 is a schematic system configuration diagram of the organic light emitting display device 100 according to the present embodiments.

Referring to FIG. 1, the organic light emitting display device 100 according to the present embodiments has a plurality of data lines DL and a plurality of gate lines GL, and a plurality of data lines DL and a plurality of gate lines An organic light emitting display panel 110 in which a plurality of subpixels (SP: Sub Pixels) defined by (GL) are arranged, a data driver 120 that drives a plurality of data lines (DL), and a plurality of gate lines. It may include a gate driver 130 that drives (GL).

Additionally, the organic light emitting display device 100 according to the present embodiments may further include a controller 140 that controls the data driver 120 and the gate driver 130.

This controller 140 can control the data driver 120 and the gate driver 130 by supplying various control signals to the data driver 120 and the gate driver 130.

This controller 140 starts scanning according to the timing implemented in each frame, converts the input image data input from the outside to fit the data signal format used by the data driver 120, and outputs the converted image data, Data operation is controlled at an appropriate time according to the scan.

This controller 140 may be a timing controller used in typical display technology, or may be a control device that performs other control functions including a timing controller.

This controller 140 may be implemented as a separate component from the data driver 120, or may be implemented as an integrated circuit together with the data driver 120.

The data driver 120 drives a plurality of data lines DL by supplying a data voltage to the plurality of data lines DL. Here, the data driver 120 is also called a 'source driver'.

This data driver 120 may be implemented including at least one source driver integrated circuit (SDIC). Each source driver integrated circuit (SDIC) may include a shift register, a latch circuit, a digital to analog converter (DAC), an output buffer, etc. . In some cases, each source driver integrated circuit (SDIC) may further include an analog to digital converter (ADC).

The gate driver 130 sequentially drives the plurality of gate lines GL by sequentially supplying scan signals to the plurality of gate lines GL. Here, the gate driver 130 is also called a ‘scan driver’.

This gate driver 130 may be implemented by including at least one gate driver integrated circuit (GDIC: Gate Driver Integrated Circuit).

Each gate driver integrated circuit (GDIC) may include, for example, a shift register and a level shifter.

The gate driver 130 sequentially supplies scan signals of on voltage or off voltage to a plurality of gate lines GL under the control of the controller 140.

When a specific gate line is opened by the gate driver 130, the data driver 120 converts the image data received from the controller 140 into an analog data voltage and supplies it to the plurality of data lines DL.

As shown in FIG. 1, the data driver 120 may be located only on one side (e.g., top or bottom, left or right) of the organic light emitting display panel 110, and in some cases, depending on the driving method, panel design method, etc. Accordingly, they may be located on both sides (e.g., top and bottom, or left and right, etc.) of the organic light emitting display panel 110.

As shown in FIG. 1, the gate driver 130 may be located only on one side (e.g., left or right, or upper or lower) of the organic light emitting display panel 110, and in some cases, may be driven by a driving method or panel design method. Depending on the circumstances, they may be located on both sides (e.g., left and right, or top and bottom) of the organic light emitting display panel 110.

The above-described controller 140 controls various timings including a vertical synchronization signal (Vsync), a horizontal synchronization signal (Hsync), an input data enable (DE) signal, a clock signal (CLK), etc., along with input image data. Signals are received from outside (e.g. host system).

In order to control the data driver 120 and the gate driver 130, the controller 140 receives timing signals such as a vertical synchronization signal (Vsync), a horizontal synchronization signal (Hsync), an input DE signal, and a clock signal, and receives various Control signals are generated and output to the data driver 120 and gate driver 130.

For example, the controller 140 uses a gate start pulse (GSP: Gate Start Pulse), a gate shift clock (GSC), and a gate output enable signal (GOE: Gate) to control the gate driver 130. Outputs various gate control signals (GCS: Gate Control Signal) including Output Enable.

The gate start pulse (GSP) controls the operation start timing of one or more gate driver integrated circuits constituting the gate driver 130. The gate shift clock (GSC) is a clock signal commonly input to one or more gate driver integrated circuits, and controls the shift timing of a scan signal (gate pulse). The gate output enable signal (GOE) specifies timing information of one or more gate driver integrated circuits.

In addition, the controller 140 uses a source start pulse (SSP), a source sampling clock (SSC), and a source output enable signal (SOE) to control the data driver 120. ) outputs various data control signals (DCS: Data Control Signal), etc.

Here, the source start pulse (SSP) controls the data sampling start timing of one or more source driver integrated circuits constituting the data driver 120. The source sampling clock (SSC) is a clock signal that controls the sampling timing of data in each source driver integrated circuit. The source output enable signal (SOE) controls the output timing of the data driver 120.

Each subpixel (SP) arranged in the organic light emitting display panel 110 includes an organic light emitting diode (OLED), which is a self-light emitting device, and a driving transistor for driving the organic light emitting diode (OLED). It is composed of circuit elements such as:

The type and number of circuit elements constituting each subpixel (SP) may be determined in various ways depending on the provided function and design method.

Recently, double rate driving (hereinafter simply referred to as 'DRD') has been used to reduce the number of data drivers or data lines (DL) of a display device. In a panel using the DRD method, the number of horizontal gate lines (HGL) is doubled compared to the prior art, but the number of data lines (DL) is reduced by half. In other words, the DRD method is a method that can implement the same resolution while reducing the number of data drives or data lines (DL) required by half.

In a display device using the DRD method, gate drivers may be formed on each of the left and right sides of the panel to supply scan pulses to gate lines formed on the panel.

FIG. 2 is an exemplary diagram of a subpixel circuit of an organic light emitting display device 100 driven by the DRD method according to an embodiment of the present invention. In this embodiment, two adjacent subpixels sharing one data line are shown.

Referring to FIG. 2, the red organic light emitting diode (R _OLED ) is connected to the first driving transistor (DT1), and the gate electrode of the first driving transistor (DT1) supplies a data voltage through the first switching transistor (T11). provided. The green organic light emitting diode (G _OLED ) is connected to the second driving transistor (DT2), and the gate electrode of the second driving transistor (DT2) provides a data voltage through the same data line through the second switching transistor (T21). Receive.

The organic light emitting display device 100 according to the present embodiments may provide a sensing function that senses characteristic values of subpixels and a compensation function that compensates for subpixel characteristic values using the sensing results.

In this specification, sensing a characteristic value for a subpixel means sensing a characteristic value or change in characteristic value of a circuit element (driving transistor (DT), organic light emitting diode (OLED)) within the subpixel, or sensing a change in characteristic value of a circuit element (driving transistor (DRT)) within the subpixel. ), organic light-emitting diode (OLED)), this may mean sensing the difference in characteristic values.

In this specification, compensating the characteristic value for a subpixel means making the characteristic value or change in characteristic value of the circuit element (driving transistor (DT), organic light emitting diode (OLED)) within the subpixel to a predetermined level, or the circuit element (driving transistor (OLED)) This may mean reducing or eliminating the difference in characteristics between (DT) and organic light emitting diode (OLED)).

In order to provide a sensing function and a compensation function, the organic light emitting display device 100 according to the present embodiments may include an appropriate subpixel circuit (subpixel structure) and a compensation circuit including a sensing and compensation configuration.

The scanning and sensing operations of the circuit element configured in this way will be described with reference to FIGS. 3A to 3D.

First, as shown in FIG. 3A, the first switching transistor T11 of the red subpixel is turned on by the first scanning signal (Scan 1) for driving the red organic light emitting diode (R _OLED ) of the red subpixel. Thus, the potential of the node connected to the gate electrode of the first driving transistor DT1 increases.

As shown in FIG. 3B, the second switching transistor T12 of the red subpixel is turned on by the first sensing signal (Sense 1) for measuring the characteristic value of the circuit element (driving transistor or organic light emitting diode) of the red subpixel. -It is turned on and the voltage between the driving transistor (DT1) or the red organic light emitting diode (R _OLED ) is transmitted to the reference voltage line.

As shown in FIG. 3C, the first switching transistor (T21) of the green subpixel is turned on by the second scanning signal (Scan 2) for driving the green organic light emitting diode (G _OLED ), and the second driving transistor (T21) is turned on. The potential of the node connected to the gate electrode of DT1) rises.

As shown in FIG. 3D, the second switching transistor (T22) of the green subpixel is turned on by the second sensing signal (Sense 2) for measuring the characteristic value of the circuit element (driving transistor or organic light emitting diode) of the green subpixel. -It is turned on and the voltage between the driving transistor (DT2) or the green organic light emitting diode (G _OLED ) is transferred to the reference voltage line.

The second switching transistor T12 of the red subpixel and the second switching transistor T22 of the green subpixel are connected to the same reference voltage line. Each driving transistor (DT1, DT2) and each organic light emitting diode (R _OLED , A capacitor (Cst) is placed between the G _OLED ). This capacitor (Cst) is not a parasitic capacitor (e.g., Cgs, Cgd), which is an internal capacitor that exists between the gate electrode and drain electrode of each driving transistor (DT1, DT2), but a capacitor of the driving transistor (DT1, DT2). It is an external capacitor intentionally designed externally.

A driving voltage (Vdd) may be applied to the first electrode of each driving transistor (DT1, DT2). A base voltage (Vss) may be applied to the second electrode of the organic light emitting diode (OLED).

Each driving transistor (DT1, DT2) is connected to each organic light emitting diode (R _OLED , By supplying driving current to G _OLED ), each organic light emitting diode (R _OLED , G _OLED ) is driven.

It goes without saying that the transistors (T11, DT1, T12, DT2, T21, T22) included in each subpixel may be implemented as an n type, as shown in the example of FIG. 2, or may also be implemented as a p type.

Meanwhile, the first scan signal (SCAN1) and the second scan signal (SCAN2) are transmitted through different gate lines to the gate electrode of the first transistor (T11) of the red subpixel and the first transistor (T21) of the green subpixel. Each may be applied to the gate electrode. That is, the first scan signal (SCAN 1) and the second scan signal (SCAN 2) may be separate gate signals. In some cases, the first scan signal (SCAN 1) and the second scan signal (SCAN 2) may be the same gate signal. In this case, the first scan signal (SCAN 1) and the second scan signal (SCAN 2) are connected to the gate electrode of the first transistor (T11) of the red subpixel and the first transistor (T21) of the green subpixel through the same gate line. It may also be commonly applied to the gate electrode of .

Figure 4 is a circuit diagram showing the configuration of a unit subpixel of an organic light emitting display device according to another embodiment of the present invention.

In the OLED display device according to the present invention, each subpixel is configured to share one data line with an adjacent subpixel and a reference suppression line with another adjacent subpixel.

Unlike the organic light emitting display device according to the embodiment of FIG. 2, one subpixel is provided with driving transistors (DT, DT2, DT3) that transmit a driving voltage to each organic light emitting diode, and each driving transistor (DT3) is provided by receiving a scan signal. It includes switching transistors (T31, T32, T33) that provide a data voltage provided through a data line to the gate electrodes of DT, DT2, and DT3. Additionally, the switching transistors T31, T32, and T32 of each subpixel share the reference voltage line of the adjacent subpixel. In this example diagram, the switching transistors (T32 and T33) are shown sharing one reference voltage line, but this is shown to represent a subpixel forming one pixel among a plurality of subpixels, so the switching transistor (T31) ) may share a reference voltage line with a switching transistor (not shown) of an adjacent subpixel (not shown).

For example, the red subpixel includes a red organic light emitting diode (R _OLED ) and a first transistor (DT1), which is a driving transistor for driving the red organic light emitting diode (R _OLED ), and the first transistor (DT1) ) and a second transistor (T31) electrically connected between the gate electrode and the data line (Data [n]).

The green subpixel includes a red organic light emitting diode (G _OLED ) and a first transistor (DT2), which is a driving transistor for driving the green organic light emitting diode (G _OLED ), and a gate electrode of the first transistor (DT2). and a second transistor (T32) electrically connected between the data line (Data [n]).

The blue subpixel includes a red organic light emitting diode (B _OLED ) and a first transistor (DT3), which is a driving transistor for driving the blue organic light emitting diode (B _OLED ), and a gate electrode of the first transistor (DT3). and a second transistor (T33) electrically connected between the data line (Data [n+1]).

For example, the second transistors (T32 and T33) sharing one reference voltage line (Ref[n]) each sense the threshold voltage of the first transistors (DT1 and DT2) or use one reference voltage line ( By sharing Ref[n]), the threshold voltage of the organic light emitting diode (R _OLED , G _OLED ) of each subpixel can be sensed.

The source electrode of the second transistor T31, T32, and T33 of each subpixel is connected to the data line (Data [n] or Data [n+1]). At this time, the second transistors (T31, T32) share the data line (Data [n]), and the second transistor (T33) shares the data line (Data [n+1]) with an adjacent subpixel (not shown). Share.

Meanwhile, the drain electrodes of the second transistors T32 and T33 are connected to the reference voltage line Ref[n] and share the same reference voltage line.

Meanwhile, the source electrode of the second transistor (T31, T32, T33) is connected between the first transistor (DT1, DT2, DT3) of the adjacent subpixel and the organic light emitting diode (R _OLED , G _OLED , B _OLED ) . For example, the source electrode of the second transistor T32 of the green subpixel is connected to the connection node of the first transistor DT1 of the red subpixel and the organic light emitting diode R _OLED . The source electrode of the second transistor T33 of the blue subpixel is connected to the connection node of the first transistor DT2 of the green subpixel and the organic light emitting diode (G _OLED ).

Meanwhile, a storage capacitor (Cst) is disposed between the drain electrode of the second transistor (T31, T32, T33) of each subpixel and the organic light emitting diode (R _OLED , G _OLED , B _OLED ).

The gate driver according to the present invention sequentially supplies a sensing signal and a scan signal through the first electrode of the second transistor. Figures 5A to 5D below are exemplary diagrams showing the signal flow of the scan operation and sensing operation of each subpixel.

FIG. 5A shows a scanning operation of supplying a data voltage to the gate electrode of the driving transistor DT1 of the red subpixel. When the scan signal (Scan 1[n]) is provided to the gate electrode of the second transistor (T31) of the red subpixel, the second transistor (T31) of the red subpixel is turned on to output the data voltage line (Data [n]). ) is transmitted to the gate electrode of the driving transistor (DT1) of the red subpixel.

FIG. 5B shows an operation of sensing characteristic values of the driving transistor (DT1) of the red subpixel or the red organic light emitting diode (R _OLED ). When the sensing signal (Sense 1[n]) is transmitted to the gate electrode of the second transistor (T32) of the green subpixel, the second transistor (T32) of the green subpixel is turned on, and the driving transistor ( The potential of the connection node of DT1) and the red organic light emitting diode (R _OLED ) is transmitted to the reference voltage line (Ref [n]).

Meanwhile, Figure 5c shows a scanning operation of supplying a data voltage to the gate electrode of the driving transistor DT2 of the green subpixel. When the scan signal (Scan 2[n]) is provided to the gate electrode of the second transistor (T32) of the green subpixel, the second transistor (T32) of the green subpixel is turned on to generate the data voltage line (Data [n]). ) is transmitted to the gate electrode of the driving transistor (DT2) of the green subpixel.

FIG. 5D shows an operation of sensing characteristic values of the driving transistor (DT2) of the green subpixel or the green organic light emitting diode (G _OLED ). When the sensing signal (Sense 2[n]) is transmitted to the gate electrode of the second transistor (T33) of the blue subpixel, the second transistor (T33) of the blue subpixel is turned on, and the driving transistor ( The potential of the connection node of DT2) and the green organic light emitting diode (G _OLED ) is transmitted to the reference voltage line (Ref [n]).

Figure 5e shows a scanning operation of supplying a data voltage to the gate electrode of the driving transistor DT3 of the blue subpixel. When the scan signal (Scan 1[n+1]) is provided to the gate electrode of the second transistor (T33) of the blue subpixel, the second transistor (T33) of the blue subpixel is turned on and the data voltage line (Data [ The data voltage provided through [n+1]) is transmitted to the gate electrode of the driving transistor (DT3) of the blue subpixel.

Figure 5f shows an operation of sensing the characteristic values of the driving transistor (DT3) of the blue subpixel or the blue organic light emitting diode (B _OLED ). When the sensing signal (Sense 2[n+1]) is transmitted to the gate electrode of the second transistor (T34) of the red subpixel (not shown) of the adjacent pixel, the second transistor (Sense 2[n+1]) of the red subpixel (not shown) of the adjacent pixel T34) is turned on and transfers the potential of the connection node of the driving transistor (DT3) of the blue subpixel and the blue organic light emitting diode (B _OLED ) to the reference voltage line (Ref [n+1]).

As described above, the DRD driving type organic light emitting display device and its driving method according to an embodiment of the present invention can be sequentially driven by sharing one data with two adjacent subpixels, and can drive one reference voltage to the two adjacent subpixels. By sharing the subpixels, the characteristic values of the circuit elements of the subpixels can be sensed. In addition, the DRD driving type organic light emitting display device and its driving method according to another embodiment of the present invention can reduce the number of transistors included in each subpixel and sequentially provide scan signals and sensing signals through one gate line. there is.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art may make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

100: Organic light emitting display device 110: Organic panel
120: data driver 130: gate driver
140: controller

Claims (11)

An organic light emitting display panel in which a plurality of subpixels defined by a plurality of data lines and a plurality of gate lines are arranged;
a data driver driving the plurality of data lines; and
Includes a gate driver that drives the plurality of gate lines,
Among the plurality of subpixels, the nth subpixel (n is an odd number among natural numbers) shares one data line and one reference voltage line with the n+1th subpixel adjacent in the direction in which the gate line extends,
The plurality of subpixels include an organic light emitting diode, a first transistor for driving the organic light emitting diode, and a second transistor electrically connected between a gate electrode of the first transistor and a data line,
The gate driver sequentially supplies a sensing signal and a scan signal through the first electrode of the second transistor,
The second electrode of the second transistor of the n-th subpixel is connected to the data line, and the third electrode of the second transistor of the n-th subpixel is connected to the first electrode of the first transistor,
The second electrode of the second transistor of the n+1th subpixel is connected to the data line, and the third electrode of the second transistor of the n+1th subpixel is connected to the reference voltage line.
The gate driver supplies a scan signal (Scan1[n]) through the first electrode of the second transistor of the n-th subpixel, and then through the first electrode of the second transistor of the n+1-th subpixel. An organic light emitting display device characterized by supplying a sensing signal (Sense1[n]) and then supplying a scan signal (Scan2[n]) through the first electrode of the second transistor of the n+1th subpixel. . delete The organic light emitting display device of claim 1, wherein the nth and n+1th subpixels share one reference voltage line to sense the threshold voltage of the first transistor. The organic light emitting display device of claim 1, wherein the nth and n+1th subpixels share one reference voltage line to sense the threshold voltage of the organic light emitting diode.
delete delete The organic light emitting display device of claim 1, wherein the second electrode of the second transistor is connected between the first transistor of an adjacent subpixel and the organic light emitting diode. The organic light emitting display device of claim 7, further comprising a capacitor between the third electrode of the second transistor and the organic light emitting diode. An organic light emitting display device in which the nth subpixel (n is an odd number among natural numbers) includes the n+1th subpixel adjacent in the direction in which the gate line extends and a subpixel that shares one data line and one reference voltage line. In the driving method,
Outputting a scan signal for driving the n-th subpixel and a sensing signal for sensing characteristic values of a circuit element of the n-th subpixel using one signal line;
A step of outputting a scan signal for driving an adjacent n+1-th subpixel and a sensing signal for sensing characteristic values of a circuit element of the n+1-th subpixel using one signal line,
The second electrode of the second transistor of the n-th subpixel is connected to the data line, and the third electrode of the second transistor of the n-th subpixel is connected to the first electrode of the first transistor,
The second electrode of the second transistor of the n+1th subpixel is connected to the data line, and the third electrode of the second transistor of the n+1th subpixel is connected to the reference voltage line.
The gate driver supplies a scan signal (Scan1[n]) through the first electrode of the second transistor of the nth subpixel, and then senses it through the first electrode of the second transistor of the n+1th subpixel. A method of driving an organic light emitting display device by supplying a signal (Sense1[n]) and then supplying a scan signal (Scan2[n]) through the first electrode of the second transistor of the n+1-th subpixel. The method of claim 9, wherein the characteristic value of the circuit element is a threshold voltage of a driving transistor included in a subpixel. The method of claim 9, wherein the characteristic value of the circuit element is a threshold voltage of an organic light emitting diode included in a subpixel.

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