KR102045346B1 - Display panel and organic light emmiting display device inculding the same - Google Patents

Abstract

The present invention discloses an organic light emitting display device. More particularly, the present invention relates to a display panel having an improved aperture ratio of an organic light emitting display device having an internal compensation structure for compensating threshold voltage variations and mobility of a driving thin film transistor, and an organic light emitting display device including the same. will be.
According to an embodiment of the present invention, among the various signal wirings formed across the light emitting region, the reference voltage wiring is omitted, and the power supply voltage or the ground voltage is used as the reference voltage of one subpixel, and the data voltage of the subpixel is remaining. By using the sub-pixel as a reference voltage, the aperture ratio can be improved by removing the area occupied by the reference voltage wiring in the light emitting area of each pixel.

Description

DISPLAY PANEL AND ORGANIC LIGHT EMMITING DISPLAY DEVICE INCULDING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting display device, and more particularly, to a display panel having an improved aperture ratio of an organic light emitting display device having an internal compensation structure for compensating threshold voltage variations and mobility of a driving thin film transistor, and an organic field including the same. A light emitting display device is provided.

As a flat panel display to replace a conventional cathode ray tube display device, a liquid crystal display, a field emission display, and a plasma display panel ) And an organic light-emitting diode display (OLED display).

Among them, the organic light emitting diode of the organic light emitting display device has high brightness and low operating voltage characteristics, and is a self-luminous type that emits light by itself, so that contrast ratio is high and ultra-thin display can be realized. Do. In addition, the response time is a few microseconds (㎲), it is easy to implement a moving picture, there is no limitation of the viewing angle and there is an advantage that it is stable at low temperatures.

Such an organic light emitting display device includes at least one switching transistor and a driving thin film transistor in one pixel, and controls a current flowing through the organic light emitting diode included in the pixel according to the gate-source voltage of the driving thin film transistor to control an image. Implement gradation.

1 is a diagram illustrating an equivalent circuit diagram of one pixel of a conventional organic light emitting display device.

As illustrated, the organic light emitting display device has a scan signal line and a data signal line Vdata intersecting with each other, and wirings for supplying the power voltage VDD spaced apart from each other by a predetermined interval to form one pixel. PX).

In addition, the switching transistor SWT applies the data signal Vdata to the first node N1 in response to the scan signal Scan, and the driving voltage VDD is applied to the source electrode, and the first node N1 is applied. The driving thin film transistor DT for applying a drain current to the organic light emitting diode EL according to the voltage applied to the organic light emitting diode EL, and the voltage applied to the gate electrode of the driving thin film transistor DT for one frame. And a capacitor C1 to hold.

In addition, the organic light emitting diode EL includes an organic light emitting layer formed between an anode electrode of the driving thin film transistor DT, a cathode electrode of the ground VSS, and formed between the cathode electrode and the anode electrode.

The organic light emitting display device described above displays the gray level of an image by controlling the amount of current flowing through the organic light emitting diode by the driving thin film transistor DT, and the image quality is determined by the characteristics of the driving thin film transistor DT. .

However, even within one display panel, the deviation of the threshold voltage (Vth) between the driving thin film transistors between the pixels occurs, and the current flowing through each of the organic light emitting diodes EL changes to cause a problem of failing to achieve a desired gray scale. . In order to solve this problem, as illustrated in FIG. 2, one or more sampling thin film transistors SPT for applying a reference voltage Vref are added to sense a threshold voltage of the driving thin film transistor, and the drain current of the driving thin film transistor is added to the drain current of the driving thin film transistor. An internal compensation pixel structure has been proposed to compensate for threshold voltage deviation and electron mobility by removing the sensed threshold voltage component.

However, as described above, the organic light emitting display device of the internal compensation method should further include a reference voltage wiring and a connection wiring for supplying the reference voltage to each pixel.

FIG. 3 is a diagram illustrating a structure of one pixel of a conventional organic compensation type organic light emitting display device.

Referring to FIG. 3, one pixel PX of the organic light emitting display device includes three sub-pixels R, G, and B that emit three primary colors of red, green, and blue in a conventional internal compensation scheme. The light emitting region L / A is divided into a light emitting region L / A, a transistor region T / A, and a connection wiring region C / A.

The light emitting area L / A is an area in which an emission part of the organic light emitting diode is formed to emit three primary colors in the front direction, thereby realizing an image.

The transistor region T / A is a region in which a plurality of thin film transistors and capacitors are formed to provide a current corresponding to the gray level of an image to the organic light emitting diode.

In addition, the connection wiring area C / A is connected to distribute a signal such as a power supply voltage VDD and a reference voltage Vref, which are commonly provided to each of the subpixels R, G, and B, from one supply wiring. It is an area where connection wirings and contact holes are formed.

In this internal compensation structure, the area of the transistor area T / A is larger because the number of thin film transistors is larger than that of the general structure, and the area of the light emitting area L / A is relatively small, so that the aperture ratio is low, and the light emitting area is low. In L / A, a power supply voltage VDD, a data voltage Vdata, and a reference voltage Vref are applied to each subpixel R, G, and B between the subpixels R, G, and B. Since various signal wirings are formed to extend to the connection wiring region C / A, the area occupied by the light emitting part that implements the actual image in the light emitting region L / A of one pixel PX is respectively connected to the data wiring ( The area occupied by the DL_R, DL_G, DL_B, the power supply voltage wirings VDDL_R, VDDL_G, VDDL_B, and the reference voltage wiring REFL becomes smaller.

That is, the organic light emitting display device having the internal compensation structure has a problem that the aperture ratio is much lower than that of other structures.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and a display panel having an improved aperture ratio while applying an internal compensation structure having a narrow region for emitting light due to a transistor region and a plurality of signal wirings, and an organic light emitting display device including the same. The purpose is to provide.

In order to achieve the above object, a display panel according to a preferred embodiment of the present invention, in a display panel including red, green, and blue subpixels, includes a plurality of light emitting units, and provides data wiring and a power supply between the light emitting units. A light emitting region through which the voltage supply wiring passes; A transistor region including at least one thin film transistor for controlling the light emitting region; And electrically connect the reference voltage terminal of the selected first subpixel and the power voltage supply wiring among the red, green, and blue subpixels, and electrically connect the data wiring of the first subpixel with the reference voltage terminal of the second subpixel. It includes a connection wiring area including a connection wiring.

In addition, to achieve the above object, an organic light emitting display device according to an embodiment of the present invention, the display panel; A scan driver connected to the scan wiring of the display panel to supply a scan signal; And a data driver connected to the data line to supply a data signal, wherein the data driver includes a data correction circuit configured to correct a data signal of the second subpixel in response to a data signal of the first subpixel. do.

The organic light emitting display device having an internal compensation structure according to an embodiment of the present invention omits the reference voltage supply wiring among various signal wirings formed across the light emitting region and uses the power supply voltage or the ground voltage as the reference voltage of one subpixel. In addition, by using the data voltage of the subpixel as the reference voltage of the remaining subpixels, the aperture ratio can be improved by removing the area occupied by the reference voltage wiring in the emission region of each pixel.

1 is a diagram illustrating an equivalent circuit diagram of one pixel of a conventional organic light emitting display device.
FIG. 2 is a diagram illustrating an equivalent circuit diagram of one pixel of a conventional internal compensation organic light emitting display device.
FIG. 3 is a diagram illustrating a structure of one pixel of a conventional organic compensation type organic light emitting display device.
4 is a diagram illustrating an overall structure of an organic light emitting display device according to an exemplary embodiment of the present invention.
5 is a diagram illustrating a planar structure of one pixel of an organic light emitting display device according to an exemplary embodiment of the present invention.
6A is an equivalent circuit diagram of an example of one subpixel according to an exemplary embodiment of the present invention.
6B is a diagram illustrating an example of a signal waveform applied to the circuit of FIG. 6A.
7A is a diagram illustrating a data correction circuit included in the organic light emitting display device of the present invention.
FIG. 7B is a diagram illustrating a comparison of VI curves of subpixels of a conventional organic light emitting display device and VI curves of subpixels using data voltages corrected by the data correction circuit shown in FIG. 7A.
8 is a diagram illustrating VI curves of sub-pixels of an organic light emitting display device according to another embodiment of the present invention.

Hereinafter, a display panel, an organic light emitting display device including the same, and a driving method thereof will be described with reference to the accompanying drawings.

4 is a diagram illustrating an overall structure of an organic light emitting display device according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the organic light emitting display device 100 of the present invention includes a display panel 110 displaying an image and a plurality of driving units 120 and 140 controlling the same.

In the display panel 110, a plurality of scan lines SL and data lines DL are formed on the glass substrate or the plastic substrate to cross each other, and the pixel PX is defined at the intersection thereof. In addition, an EM signal line EML is formed in a direction parallel to the scan line SL, and a power supply voltage supply line VDDL is formed in a direction parallel to the data line DL to supply a corresponding signal to each pixel PX. Done.

In addition, each pixel PX of the display panel 110 applies a data driver Vdata to the scan driver 120 for supplying a scan signal Vscan to the scan line SL, and the data lines DL. Is connected to the data driver 130. The scan driver 120 may be implemented in the form of a thin film transistor to be mounted in the display panel 110.

Although not shown, the EM signal wiring (EML) and the power voltage supply wiring (VDDL) may be connected to an EM driver and a power supply (not shown) which are separately provided.

The pixel PX connected to each of the signal wires is composed of three sub-pixels (not shown) respectively displaying the three primary colors RGB, and each sub-pixel includes not only a light emitting area including a light emitting unit for the three primary colors, but also at least A thin film transistor region in which one organic light emitting diode, a thin film transistor, and a capacitor is formed is defined. In addition, each subpixel further defines a connection wiring area in which connection wirings for distributing signals to be applied in common among each signal are formed.

On the other hand, the organic light emitting diode includes a first electrode (hole injection electrode), an organic compound layer and a second electrode (electron injection electrode).

The organic compound layer may further include various organic layers for efficiently transferring a carrier of holes or electrons to the light emitting layer in addition to the light emitting layer in which actual light emission is performed. The organic layers may be hole injection layers and hole transport layers positioned between the first electrode and the light emitting layer, and electron injection layers and electron transport layers positioned between the second electrode and the light emitting layer.

In the organic light emitting display device 100 of the present invention, an internal compensation structure including at least a switching thin film transistor, a sampling thin film transistor, a driving thin film transistor, and a capacitor is applied.

The switching thin film transistor is connected to the scan line SL and the data line DL, and drives the data signal Vdata input to the data line DL according to the scan signal Vscan input to the scan line SL. To send. The capacitor is connected to the switching thin film transistor and the power supply voltage supply wiring (VDDL), and is proportional to the difference between the data signal (Vdata) transmitted from the switching thin film transistor and the threshold voltage of the driving thin film transistor sampled through the reference voltage. Save the voltage. The sampling thin film transistor samples the threshold voltage of the driving thin film transistor to be described later according to the reference voltage, and removes the threshold voltage component from the current flowing through the driving thin film transistor.

Here, the reference voltage is a signal of a different potential is applied to each sub-pixel included in the pixel (PX), in the present invention, one selected sub-pixel uses the power supply voltage as a reference voltage, the other two pixels are the one The data signal of the sub-pixel is used as a reference voltage.

Accordingly, the reference voltage supply wiring (REFL of FIG. 3) for supplying a separate reference voltage is omitted in each pixel PX, and the aperture ratio is improved by ensuring the space occupied in the pixel PX.

In addition, the driving thin film transistor is connected to the power supply voltage supply line VDDLL and the capacitor to supply an output current corresponding to the voltage stored in the capacitor to the organic light emitting diode, and the organic light emitting diode emits light. The driving thin film transistor may include a gate electrode, a source electrode, and a drain electrode, and an anode electrode of the organic light emitting diode may be connected to the drain electrode of the driving thin film transistor. A detailed description of the structure of the plurality of thin film transistors will be given later.

The scan driver 120 applies the scan signal Vscan to each pixel PX in units of one horizontal line. The scan driver 120 may be implemented as a shift register having a plurality of channels.

The data driver 130 aligns and converts the image data into a data signal Vdata that can be processed by the pixel PX in response to image data and a timing signal applied from an external system, and drives timing of each pixel PX. Are supplied to the pixel PX through the data line DL in synchronization with the control circuit.

In particular, among the pixels PX, the first sub-pixel does not use a separate reference voltage but uses the power supply voltage VDD, and the second and third sub-pixels use the data signal Vdata of the first sub-pixel. ), The data driver 130 further includes a data correction circuit 140 for correcting the voltages of the remaining second and third subpixels based on the data signal Vdata of the first subpixel. In other words, the data signal Vdata of the second and third subpixels is reflected in the absolute difference between the data signal of the first subpixel and the conventional reference voltage to supply the data signal originally required. Here, it is preferable that the first subpixel is set to a subpixel corresponding to green (G).

According to the above-described structure, the pixels PX of the display panel 110 are sequentially driven in the unit of scan lines SL by the scan signal Vscan applied through the scan lines SL, and the data lines DL. The gray level corresponding to the data signal Vdata applied through the plurality of pixels is displayed. Although not shown, each pixel PX includes an organic light emitting diode and a plurality of thin film transistors for driving the same, and each thin film transistor includes a gate line GL, a data line DL, and an EM signal line EML. ) And the gray level according to the signal applied to the power supply wiring (VDDL) and ground supply wiring (VSSL).

In particular, among the pixels PX, the pixel PX in which the capacitor is short-circuited is applied to one electrode of the capacitor by applying a power supply voltage VDD, which is not part of the reference voltage Vref, among the sampling transistors for compensating the threshold voltage. The voltage level of the two electrodes of the capacitor shorted by the foreign material becomes equal to the power supply voltage VDD or the data signal Vdata so that the organic light emitting diode does not emit light and has a dark spot. The technical structure of the present invention will be described in more detail with reference to a planar structure diagram of one pixel of an organic light emitting display according to an example.

5 is a diagram illustrating a planar structure of one pixel of an organic light emitting display device according to an exemplary embodiment of the present invention.

Referring to FIG. 5, one pixel of the organic light emitting display device of the present invention includes three sub-pixels R, G, and B that emit three primary colors of red, green, and blue, and the light emitting area L / is large. A), the transistor region T / A and the connection wiring region C / A.

The light emitting area L / A is an area in which an emission part of an organic light emitting diode corresponding to three primary colors is formed and emits light toward the front, thereby realizing an image, and the transistor area T / A is formed by a plurality of thin film transistors and resistors. An area for providing an organic light emitting diode with a current corresponding to the gray level of an image.

In addition, the connection wiring area C / A includes a connection wiring and a contact hole connected to distribute a signal such as a power supply voltage VDD commonly provided to each subpixel R, G, and B from one supply wiring. This is the area to be formed.

In particular, in the drawing, the reference voltage input terminal supplied to the green subpixel G is electrically connected to the power supply voltage supply wiring VDDL, and the reference voltage input terminal supplied to the red and blue subpixels R and B is connected to the green subpixel. The structure electrically connected with the data line DL_G of (G) is illustrated.

Therefore, only the power supply voltage supply wiring VDDL and the data wirings DL_R, DL_G, and DL_B exist in the signal wiring passing through the light emitting region L / A, and the conventional reference voltage supply wiring (see FIG. 3). REFL) will be omitted. In addition, according to the structure, the portion of the power supply voltage supply line VDDL extending downward in the connection wiring region C / A is referred to as the reference of the green sub-pixel G through the first contact hole h1. It is electrically connected to the voltage input terminal, the data line DL_G of the green subpixel G contacts the connection line 102, and the connection line 102 again opens the second and third contact holes h2 and h3. Are electrically connected to reference voltage input terminals of the red subpixel R and the blue subpixel B, respectively.

In FIG. 5, when the light emission area of the blue subpixel B is extended than before, the aperture ratios of the red, green, and blue subpixels R, G, and B are 25.4%, 25.4%, and 30.4%, respectively (see FIG. 3). In the present invention, the aperture ratios of the red, green, and blue subpixels R, G, and B are 28.9%, 28.9%, and 34.2%, respectively, which are about 12.7% higher.

Hereinafter, a structure of one subpixel of an organic light emitting display device according to an exemplary embodiment of the present invention will be described with reference to the drawings.

6A is an equivalent circuit diagram illustrating an example of one subpixel according to an exemplary embodiment of the present invention, and FIG. 6B is a diagram illustrating an example of a signal waveform applied to the circuit of FIG. 6A.

Referring to FIG. 6A, one subpixel of the internal compensation structure organic light emitting display device according to the present invention includes six thin film transistors, one capacitor, and an organic light emitting diode. In the figure, the case where the thin film transistor is a p-type MOSFET is illustrated, but an n-type MOSFET is also applicable.

That is, the organic light emitting diode EL corresponds to the R, G, and B light emitting regions (L / A) of FIG. 5, and each of the thin film transistors and the capacitors is disposed in the transistor region and the connection wiring regions (T / A, C / A). Corresponding.

In the following description, the reference voltage Vref is the power supply voltage VDD when the subpixel is the green subpixel, and the reference voltage Vref is the data signal Vdata of the green subpixel when the red and blue subpixels. .

In the switching thin film transistor SWT, a scan signal Vscan is applied to a gate electrode, a data signal Vdata is applied to a source electrode, and a drain electrode is connected to the first node N1.

In the first sampling thin film transistor SPT1, an EM signal EML is applied to a gate electrode, a reference voltage Vref is applied to a source electrode, and a drain electrode is connected to the first node N1.

In the second sampling thin film transistor SPT2, a scan signal Vscan is applied to the gate electrode, a reference voltage Vref is applied to the source electrode, and a drain electrode is connected to the second node N2.

In the third sampling thin film transistor SPT3, the EM signal EM is applied to the gate electrode, and the source and drain electrodes are connected to the third node N3 and the second node N2, respectively.

In the fourth sampling thin film transistor SPT4, the scan signal Vscan is applied to the gate electrode, and the source and drain electrodes are connected to the third node N3 and the fourth node N4, respectively.

In the driving thin film transistor DT, a gate electrode is connected to the fourth node N4, a power supply voltage VDD is applied to a source, and a drain electrode is connected to the third node N3.

Both electrodes of the capacitor C1 are connected to the first node N1 and the fourth node N4, respectively.

The driving method of the organic light emitting display device of the present invention having the subpixel having such a structure will be described with reference to the signal waveform of FIG. 6B.

First, when the high level scan signal Scan applied to the first period 1T transitions to the low level, the switching thin film transistor SWT and the fourth sampling thin film transistor SPT4 are gradually turned on to form the fourth node. N4) is initialized to the reference voltage (Vref) level.

Subsequently, when the scan signal Vscan completely transitions to a low level in the second period 2T, the EM signal EM transitions to a high level, and at this time, according to the turn-off delay of the second sampling thin film transistor SPT2. The second node N2 maintains the reference voltage level Vref. In addition, as the switching thin film transistor SWT is turned on, the first node N1 becomes the data signal Vdata level, and the fourth node N4 becomes the power supply voltage VDD and the driving thin film transistor DT. The absolute value of the threshold voltage of the difference becomes (VDD- | Vth |) and stored in the capacitor C1.

That is, as illustrated in FIG. 2B, the voltage Vg applied to the gate electrode of the driving thin film transistor DT is increased to a level obtained by subtracting the threshold voltage of the driving thin film transistor DT from the second section 2T.

Next, as the scan signal Scan gradually transitions to the high level in the third section 3T, the switching thin film transistor SWT and the fourth sampling thin film transistor SPT4 are turned off, and the first node N1 is turned off. ) Becomes the reference voltage level Vref, and the voltage of the fourth node N4 is boosted according to Equation 1 according to the voltage change of the first node N1.

Accordingly, the voltage applied to the gate electrode of the driving thin film transistor DT is changed, and according to Equation 1, the current IOLED flowing through the driving thin film transistor DT through the organic light emitting diode EL is According to Equation 2 below.

In Equation 2, Vgs is a gate-source voltage of the driving transistor DT, and Vth is a threshold voltage of the driving transistor DT. K is a characteristic value of the driving transistor DT, and K = u × Cox × W / L.

Therefore, the current flowing through the organic light emitting diode EL is converted as a function of the data signal and the reference voltage Vref, thereby compensating the threshold voltage to improve the luminance deviation of each subpixel. The voltage Vref becomes the power supply voltage VDD level (Vref = VDD), and the reference voltage Vref in the case of the red and green subpixels becomes the data signal Vdata level of the green subpixel for the current horizontal line. (Vref = Vdata (G)).

Meanwhile, according to the pixel structure and the driving method, the organic light emitting display device of the present invention needs to perform correction on red and blue data signals, and for this purpose, the data driver includes a data correction circuit.

FIG. 7A is a diagram illustrating a data correction circuit included in an organic light emitting display device according to an exemplary embodiment of the present invention, and FIG. 7B illustrates a VI curve for subpixels of a conventional organic light emitting display device and a data correction circuit shown in FIG. 7A. The VI curves of subpixels using the corrected data voltages are compared.

Referring to FIG. 7A, the data correction circuit 140 of the present invention may be embedded in the data driver 130 (in FIG. 5), and the line memory unit 141 may temporarily store the aligned and converted data signals therefrom. And data correction units 142 and 143 for correcting the data signal based on the specific data signal.

The n-th data signal Vdata (Rn), Vdata (Gn), and Vdata (Bn) corresponding to red, green, and blue are input to the data correction circuit 140, and the line memory unit 141 is input. ) Temporarily stores the n-th green data signal Vdata (Gn-1). At this time, a preset default value is stored before the first green data signal Vdata (Gn-1) (when n = 1).

In addition, the R data corrector 142 and the B data corrector 143 read the previous green data signal Vdata (Gn-1) stored in the line memory 141 to output the nth red and blue data signals. (Vdata (Rn) and Vdata (Bn)) are corrected to output the corrected nth red and blue data signals Vdata (Rn ', Vdata (Bn)' to the corresponding subpixel.

That is, the red and blue subpixels use the green data signal Vdata (Gn) as the reference voltage Vref, and thus correct the red and blue data signals Vdata (Rn, Vdata (Bn) by reflecting them. Done.

7B is a view showing V-I curves of sub-pixels of the organic light emitting display device according to the related art and the exemplary embodiment of the present invention.

In the conventional organic light emitting display device, all three sub-pixels use the same level of reference voltage Vref, and thus, V-I characteristics shown in FIG. 7B appear when 256 gray levels are represented. Here, the V-I curve G_CV of the green subpixel has a smaller gradation voltage range than the other subpixels due to the color characteristics. Accordingly, in the present invention, the green data signal Vdata is set as the reference voltage.

That is, the organic light emitting display device of the present invention uses the data signal of the green subpixel as a reference voltage for the red and green subpixels, so that the VI curve G_CV of the green subpixels starts from the power supply voltage VDD. Is set. According to the reference voltage set as described above, if the data signal of the green subpixel in the previous horizontal line has a random value P1, the VI curve R_CV of the red subpixel is set based on P1, and the red subpixel The data signal is determined by P2. In addition, the V-I curve B_CV of the blue subpixel is also set based on P1 and has P3. P1 to P3 may be voltages corresponding to 256 gray levels.

In the above embodiment, the data signal of the green subpixel having the smallest gradation value range is set as the reference voltage of the other two subpixels, but a method of setting the reference signal by sequentially referring to the data signals for each color is also applicable.

8 is a diagram illustrating V-I curves of sub-pixels of an organic light emitting display device according to another exemplary embodiment of the present invention.

Referring to FIG. 8, in another embodiment of the present invention, the power supply voltage VDD is used as a reference voltage for the green subpixel, from which the V-I curve G_CV of the green subpixel is set. Next, the V-I curve R_CV of the red subpixel is set using the data signal P1 of the previous green subpixel as the reference voltage. Further, the V-I curve B_CV of the blue subpixel is set based on the data signal P2 of the previous red subpixel, and the data signal P3 is determined within the range.

That is, the reference voltage of the green subpixel is set as the power supply voltage, the reference voltage of the red subpixel is set as the data signal of the green subpixel of the n-th horizontal line, and the reference voltage of the blue subpixel is n-. The data signal of the red subpixel of the first horizontal line is set.

According to another exemplary embodiment, the data correction circuit 140 shown in FIG. 7A may include a data signal corresponding to the n-th horizontal line of the green subpixel and the red subpixel. Temporarily stores the data signal corresponding to the n-1 th horizontal line, and the R data correction unit 142 performs the n-1 th horizontal of the red sub pixel through the data signal of the green sub pixel stored in the line memory unit 141. The data signal corresponding to the line is corrected, and the B data correction unit 143 corrects the data signal corresponding to the nth horizontal line of the blue subpixel through the data signal of the red subpixel stored in the line memory unit 141. Should be changed to

Many details are set forth in the foregoing description but should be construed as illustrative of preferred embodiments rather than to limit the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

SL: Scan Wiring EML: EM Signal Wiring
VDDL: Power Supply Voltage DL: Data Connection
PX: Pixel VDD: Power Supply Voltage
Vscan: Scan Signal Vdata: Data Signal
100: organic light emitting display device 110: display panel
120: scan driver 130: data driver
140: data correction circuit

Claims (16)

A display panel comprising red, green, and blue subpixels,
A light emitting area including a plurality of light emitting parts, through which data wiring and power voltage supply wiring pass between the light emitting parts;
A transistor region including at least one thin film transistor for controlling the light emitting region; And
Among the red, green, and blue subpixels, the reference voltage terminal of the selected first subpixel is electrically connected to the power supply voltage supply wiring, and the data wiring of the first subpixel is electrically connected to the reference voltage terminal of the second subpixel. Connection wiring area including connection wiring
Display panel comprising a. The method of claim 1,
And the first subpixel is a green subpixel. The method of claim 2,
The connection wiring,
And a data line of the first subpixel is electrically connected to a reference voltage terminal of the third subpixel. The method of claim 2,
The connection wiring,
And a data line of the second subpixel is electrically connected to a reference voltage terminal of the third subpixel. The method according to any one of claims 3 and 4,
And the second subpixel and the third subpixel are red subpixels and blue subpixels, respectively. The method of claim 1,
The power supply voltage supply wiring,
And a light emitting part of the red subpixel and the green subpixel. The method of claim 1,
The red, green and blue subpixels are
Organic light emitting diodes;
A switching thin film transistor applying a data signal to an output terminal in response to the scan signal;
A capacitor for storing a voltage corresponding to the data signal;
A driving thin film transistor configured to determine a current flowing through the organic light emitting diode; And
A plurality of sampling thin film transistors for removing the threshold voltage component of the driving thin film transistor from the voltage stored in the capacitor through the voltage applied to the reference voltage terminal according to the EM signal and the scan signal
Display panel comprising a. A light emitting region through which data and power supply voltage supply wirings pass between the plurality of light emitting units, a transistor region including at least one thin film transistor controlling the light emitting region, and a first subpixel selected from among red, green, and blue subpixels; A display panel including a connection wiring area electrically connected to a reference voltage terminal of the power supply line and a power supply voltage supply wiring, and a connection wiring electrically connecting a data wiring of the first subpixel to a reference voltage terminal of a second subpixel;
A scan driver connected to the scan wiring of the display panel to supply a scan signal; And
A data driver connected to the data line to supply a data signal;
The data driver,
A data correction circuit for correcting a data signal of the second subpixel in response to a data signal of the first subpixel
An organic light emitting display device comprising a. The method of claim 8,
The data correction circuit,
A line memory unit for temporarily storing a data signal corresponding to the n−1 (n is a natural number) horizontal line of the first subpixel; And
First and second data correctors configured to correct data signals corresponding to an nth horizontal line of the second subpixel and the third subpixel through the data signals stored in the line memory unit;
An organic light emitting display device comprising a. The method of claim 8,
The data correction circuit,
And correcting the data signal of the third sub-pixel in response to the data signal of the second sub-pixel. The method of claim 10,
The data correction circuit,
A line memory unit configured to temporarily store a data signal corresponding to the n-th horizontal line of the first sub-pixel and a data signal corresponding to the n-th horizontal line of the second sub-pixel;
A first data correcting unit correcting a data signal corresponding to the n−1 th horizontal line of the second subpixel through the data signal of the first subpixel stored in the line memory unit; And
A second data corrector configured to correct a data signal corresponding to an nth horizontal line of the third subpixel through a data signal of a second subpixel stored in the line memory unit;
An organic light emitting display device comprising a. The method according to any one of claims 9 and 11,
And the first to third subpixels are green, red, and blue subpixels, respectively. A first subpixel and a second subpixel having a reference voltage terminal and a power supply voltage terminal;
A power supply voltage supply wiring connected to a reference voltage terminal of the first subpixel, a power supply voltage terminal of the first subpixel, and a power supply voltage terminal of the second subpixel; And
And a connection line connecting the data line of the first subpixel to a reference voltage terminal of the second subpixel. The method of claim 13,
And a third subpixel having a reference voltage terminal and a power supply voltage terminal.
A power supply voltage terminal of the third subpixel is connected to the power supply voltage supply line,
The reference voltage terminal of the third subpixel is connected to a data line of the second subpixel. The method of claim 14,
Wherein the first subpixel is a green subpixel, the second subpixel is a red subpixel, and the third subpixel is a blue subpixel. The method of claim 15,
The power supply voltage supply wiring
And a display panel arranged to communicate between the light emitting units of the red subpixel and the green subpixel.

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