KR102355579B1 - In-cell touch type organic light emitting display device and the method for dirving the same, and organic light emitting display panel, touch circuit and display driver - Google Patents

Abstract

The present embodiments relate to a technology for providing an in-cell touch structure in an organic light emitting display device, have an in-cell type touch electrode structure suitable for an organic light emitting display panel, and display sensing mode in the organic light emitting display panel An in-cell touch type organic light emitting display device having a sensing line structure and a switch structure that allows the sensing line used in the touch sensing mode to be shared and used for the purpose of transmitting touch sensing related signals, a driving method thereof, and a touch circuit and display drivers.

Description

In-cell touch type organic light emitting display device and driving method thereof, organic light emitting display panel, touch circuit and display driver PANEL, TOUCH CIRCUIT AND DISPLAY DRIVER}

The present embodiments relate to an in-cell touch type organic light emitting display device.

These days, the demand for a touch sensing function for a touch input is increasing. To this end, display devices such as TVs, mobile devices, and monitors must include a touch screen panel on which touch electrodes are disposed in addition to a display panel.

However, when the touch screen panel is implemented as an add-on type that is attached to the display panel, there is a problem in that the size of the display device is inevitably increased due to the two panels.

Accordingly, development of an in-cell type touch structure in which a touch screen panel is embedded in a display panel is also being made.

On the other hand, even in an organic light emitting display device, which has advantages of fast response speed, high luminous efficiency, luminance, and viewing angle by using an organic light emitting diode (OLED) that emits light by itself, an in-cell type touch structure can be used. There is a growing demand for application.

However, in the case of an organic light emitting display panel, there is a problem in that it is difficult to embed a touch screen panel, that is, a touch electrode, due to the structural characteristics of the panel. For this reason, an in-cell touch type organic light emitting display device has not been properly developed.

It is an object of the present embodiments to provide an in-cell touch type organic light emitting display device, a driving method thereof, an organic light emitting display panel, a touch circuit, and a display driver.

Another object of the present embodiments is to enable the sensing line used in the display sensing mode to be used for signal transmission between the touch electrode and the touch circuit even in the touch sensing mode in order to sense sub-pixel characteristic values in the organic light emitting display panel. An object of the present invention is to provide a cell touch type organic light emitting display device, a driving method thereof, an organic light emitting display panel, a touch circuit, and a display driver.

Another object of the present embodiments is to provide an in-cell touch type organic device having a switch structure in which a sensing line corresponding to one type of signal line can be used in common as a signal line required for each of the display sensing mode and the touch sensing mode. An object of the present invention is to provide a light emitting display device and a driving method thereof, an organic light emitting display panel, a touch circuit, and a display driver.

Another object of the present embodiments is to provide an in-cell touch type organic light emitting diode (OLED) type in which a sensing line corresponding to one type of signal line can be commonly used as a signal line required for each of the display mode, the display sensing mode, and the touch sensing mode. An object of the present invention is to provide a display device, a driving method thereof, an organic light emitting display panel, a touch circuit, and a display driver.

In one aspect, the present embodiments sequentially apply a plurality of touch electrodes embedded in an organic light emitting display panel on which a plurality of sub-pixels are disposed and a touch driving signal to be sequentially applied to the plurality of touch electrodes during a touch sensing mode period. An in-cell touch type organic light emitting display device including a touch circuit that outputs and two or more sensing lines that sequentially transmit touch driving signals sequentially output from the touch circuit to a plurality of touch electrodes during a touch sensing mode section can provide

In such an in-cell touch type organic light emitting display device, two or more sensing lines sequentially transmit a touch driving signal to a plurality of touch electrodes during a touch sensing mode period, and transmit a touch driving signal to two or more sub-pixels during a display sensing mode period. It may be a common signal line that transmits a display sensing related voltage.

In another aspect, the present exemplary embodiments sequentially apply a plurality of touch electrodes embedded in an organic light emitting display panel on which a plurality of sub-pixels are disposed and a touch driving signal to be sequentially applied to the plurality of touch electrodes during a touch sensing mode period. An in-cell touch type organic light emitting display device including a touch circuit that outputs and two or more sensing lines that sequentially transmit touch driving signals sequentially output from the touch circuit to a plurality of touch electrodes during a touch sensing mode section can provide

In such an in-cell touch type organic light emitting display device, two or more sensing lines sequentially transmit a touch driving signal to a plurality of touch electrodes during a touch sensing mode period, and display as two or more sub-pixels during a display mode period It may be a shared signal line carrying the relevant voltage.

In another aspect, the present exemplary embodiments provide a plurality of touch electrodes built in an organic light emitting display panel on which a plurality of sub-pixels are disposed, two or more signal lines disposed on the organic light emitting display panel, and two or more touch electrodes during a touch sensing mode period. A touch circuit for sensing a touch by sequentially driving a plurality of touch electrodes through the above signal lines, and a display sensing unit for sensing a characteristic value or a characteristic value change for each sub-pixel through two or more signal lines during a display sensing mode section. It is possible to provide an in-cell touch type organic light emitting display device including:

Sensing a characteristic value or a characteristic value change for each of two or more sub-pixels through two or more sensing lines disposed on the organic light emitting display panel during a display sensing mode period, and a touch sensing mode performed before or after the display sensing mode period During the section, it is possible to provide a driving method of an in-cell touch type organic light emitting display device comprising the step of sequentially driving a plurality of touch electrodes built in the organic light emitting display panel through two or more sensing lines to sense the touch. have.

In another aspect, in the present embodiments, during the touch sensing mode period, a touch driving signal to be sequentially applied to a plurality of touch electrodes built in the organic light emitting display panel is sequentially applied through a plurality of sensing lines disposed on the organic light emitting display panel. It is possible to provide a touch circuit including a touch driving unit that outputs a . .

In such a touch circuit, the touch driver and the touch sensing unit may perform signal output and signal reception through two or more sensing lines used for signal transmission even in a section other than the touch sensing mode.

In another aspect, the present embodiments provide at least one display sensing unit configured to sense a characteristic value or a characteristic value change of at least one sub-pixel through at least one sensing line disposed on the organic light emitting display panel during the display sensing mode period. It is possible to provide a display driver including a touch circuit for sensing a touch by touch-driving two or more touch electrodes embedded in the organic light emitting display panel through at least one sensing line during the touch sensing mode section.

In another aspect, in the present embodiments, during the display mode period or the display sensing mode period, the source node or the drain node of the driving transistor in at least one sub-pixel is connected to the source node or the drain node through at least one sensing line disposed on the organic light emitting display panel. A display driver comprising: a display driver supplying a predetermined voltage; and a touch circuit supplying a touch driving signal to at least one touch electrode built in an organic light emitting diode display through at least one sensing line during a touch sensing mode period can provide

In another aspect, in the present embodiments, a plurality of data lines transferring a data voltage, a plurality of gate lines transferring a gate signal, and a plurality of touch electrodes to which a touch driving signal is sequentially applied during a touch sensing mode period And, during the touch sensing mode period, in-cell including two or more sensing lines that transmit a touch driving signal to the plurality of touch electrodes and transmit a signal other than the touch driving signal during a mode period other than the touch sensing mode period It is possible to provide a touch type organic light emitting display panel.

According to the present embodiments as described above, it is possible to provide an in-cell touch type organic light emitting display device and a driving method thereof, an organic light emitting display panel, a touch circuit, and a display driver.

According to the present embodiments, an in-cell allowing a sensing line used in the display sensing mode to be used for signal transmission between the touch electrode and the touch circuit even in the touch sensing mode in order to sense sub-pixel characteristic values in the organic light emitting display panel. It is possible to provide a touch type organic light emitting display device and a driving method thereof, an organic light emitting display panel, a touch circuit, and a display driver.

According to the present embodiments, as a signal line required for each of the display sensing mode and the touch sensing mode, the in-cell touch type organic light emitting display having a switch structure in which a sensing line corresponding to one type of signal line can be used in common. It is possible to provide an apparatus and a driving method thereof, an organic light emitting display panel, a touch circuit, and a display driver.

According to the present embodiments, as a signal line required for each of the display mode, the display sensing mode, and the touch sensing mode, an in-cell touch type organic light emitting display device that can use a sensing line corresponding to one type of signal line in common and a driving method thereof, an organic light emitting display panel, a touch circuit, and a display driver.

1 is a schematic system configuration diagram of an organic light emitting diode display according to example embodiments.
2 is an exemplary diagram of a structure of each sub-pixel disposed in the organic light emitting display panel according to the present exemplary embodiment.
3 is an exemplary diagram of a compensation circuit of an organic light emitting diode display according to the present exemplary embodiment.
4 and 5 are diagrams for explaining a threshold voltage sensing driving and a mobility sensing driving in the organic light emitting diode display according to the present exemplary embodiments.
6 is an exemplary arrangement view of two or more sensing lines disposed on the organic light emitting display panel according to the present embodiments.
7 is a diagram illustrating an operation mode of the organic light emitting diode display according to the present exemplary embodiment.
8 is a diagram schematically illustrating a touch sensing system in the organic light emitting diode display according to the present exemplary embodiments.
9 is a diagram illustrating an interconnection structure of a touch sensing system and a display sensing system in the organic light emitting diode display according to the present exemplary embodiments.
10 is a diagram schematically illustrating a display sensing operation in the organic light emitting diode display according to the present exemplary embodiment.
11 is a diagram schematically illustrating a touch sensing operation in the organic light emitting diode display according to the present exemplary embodiment.
12 is a view for explaining a region of each touch electrode embedded and disposed in the organic light emitting display panel according to the present exemplary embodiment.
13 is a layout view of one touch electrode column and sensing lines disposed corresponding thereto in the organic light emitting display panel according to the present embodiments.
14 is a diagram illustrating a connection structure between one touch electrode and one sensing line in the organic light emitting display panel according to the present embodiments.
15 shows that 3840*2160 sub-pixels are disposed in the organic light emitting display panel according to the present embodiments, one sensing line is shared for every four sub-pixel columns, and one touch electrode includes 20*20 sub-pixels and It is an exemplary view showing one touch electrode column and one touch electrode when they are arranged to correspond.
16 and 17 illustrate a time division driving method for the touch electrode group GR1 connectable to SL #1 and the touch electrode group GR2 connectable to SL #2 in the one touch electrode column illustrated in FIG. 15 . It is a drawing for
18 is a view for explaining a principle of detecting presence or absence of a touch in a touch circuit of an organic light emitting diode display according to the present exemplary embodiment.
19 is a cross-sectional view illustrating a connection point between a touch electrode and a touch detection control transistor in the organic light emitting display panel according to the present exemplary embodiment.
20 is a schematic view illustrating a display sensing system and a touch sensing system when 8 sensing lines and 16 touch electrodes are disposed on the organic light emitting display panel according to the present exemplary embodiments.
21 and 22 are timing diagrams of two types of switch elements for connecting the display sensing mode and the touch sensing mode in the organic light emitting diode display according to the present embodiments.
23 is a block diagram of a touch circuit according to the present embodiments.
24 is a block diagram of a display driver according to the present embodiments.
25 is another block diagram of a display driver according to the present embodiments.
26 is a flowchart of a method of driving an organic light emitting display device according to the present exemplary embodiment.
27 is another flowchart of a method of driving an organic light emitting diode display according to the present exemplary embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It should be understood that each component may be “interposed” or “connected”, “coupled” or “connected” through another component.

1 is a schematic system configuration diagram of an organic light emitting display device 100 according to the present exemplary embodiment.

Referring to FIG. 1 , in the organic light emitting diode display 100 according to the present exemplary embodiments, a plurality of data lines DL and a plurality of gate lines GL are disposed, and a plurality of sub-pixels (SP) are disposed. The arranged organic light emitting display panel 110 , the data driver 120 driving the plurality of data lines DL, the gate driver 130 driving the plurality of gate lines GL, and the data driver 120 . ) and a controller 140 for controlling the gate driver 130 and the like.

The controller 140 supplies various control signals to the data driver 120 and the gate driver 130 to control the data driver 120 and the gate driver 130 .

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

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

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

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 referred to as a 'scan driver'.

The gate driver 130 sequentially supplies a scan signal of an on voltage or an off voltage to the 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.

Although the data driver 120 is located only on one side (eg, upper or lower side) of the organic light emitting display panel 110 in FIG. 1 , both sides (eg, the organic light emitting display panel 110 ) according to a driving method and a panel design method. : It may be located on both the upper and lower sides).

Although the gate driver 130 is located only on one side (eg, left or right) of the organic light emitting display panel 110 in FIG. 1 , the gate driver 130 is located on both sides (eg, the left or right side) of the organic light emitting display panel 110 according to a driving method, a panel design method, etc. For example, it can be located on both the left and right side).

The above-described controller 140, along with the input image data, includes a vertical sync signal (Vsync), a horizontal sync signal (Hsync), an input data enable (DE: Data Enable) signal, various types including a clock signal (CLK), etc. Timing signals are received from the outside (eg host system).

The controller 140 converts the input image data input from the outside to match the data signal format used by the data driver 120 and outputs the converted image data, as well as the data driver 120 and the gate driver 130 . In order to control the data driver 120 and the gate driver 130 by receiving a timing signal such as a vertical synchronization signal (Vsync), a horizontal synchronization signal (Hsync), an input DE signal, and a clock signal to generate various control signals output as

For example, in order to control the gate driver 130 , the controller 140 includes a gate start pulse (GSP), a gate shift clock (GSC), and a gate output enable signal (GOE: Various gate control signals (GCS: Gate Control Signal) including Gate Output Enable) are output.

Here, 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 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 controls the data driver 120 , a source start pulse (SSP), a source sampling clock (SSC), and a source output enable signal (SOE: Source Output). Enable) and output various data control signals (DCS: Data Control Signal).

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 sampling timing of data in each of the source driver integrated circuits. The source output enable signal SOE controls the output timing of the data driver 120 .

The data driver 120 may include at least one source driver integrated circuit (SDIC) to drive a plurality of data lines.

Each source driver integrated circuit SDIC may include a shift register, a latch circuit, a digital to analog converter, an output buffer, and the like.

Each source driver integrated circuit SDIC may further include an analog-to-digital converter (ADC) in some cases.

Each subpixel SP disposed in the organic light emitting display panel 110 may include circuit elements such as transistors.

For example, in the organic light emitting display panel 110 , each sub-pixel SP is composed of an organic light emitting diode (OLED) and circuit elements such as a driving transistor for driving the organic light emitting diode (OLED).

The type and number of circuit elements constituting each sub-pixel SP may be variously determined according to a provided function and a design method.

FIG. 2 is a diagram exemplarily showing the structure of each sub-pixel disposed on the organic light emitting display panel 110 according to the present embodiments, and FIG. 3 is the compensation of the organic light emitting display device 100 according to the present exemplary embodiments. It is an example diagram for a circuit.

Referring to FIG. 2 , in the organic light emitting diode display 100 according to the present exemplary embodiments, each sub-pixel basically drives an organic light emitting diode (OLED) and an organic light emitting diode (OLED). A driving transistor (DRT) for transmitting a data voltage to the second node N2 corresponding to a gate node of the driving transistor (DRT) It may be configured to include a storage capacitor (Cstg: Storage Capacitor) that maintains a data voltage or a voltage corresponding thereto for one frame time.

An organic light emitting diode (OLED) may include a first electrode (eg, an anode electrode or a cathode electrode), an organic layer, and a second electrode (eg, a cathode electrode or an anode electrode).

The driving transistor DRT drives the organic light emitting diode (OLED) by supplying a driving current to the organic light emitting diode (OLED).

The first node N1 of the driving transistor DRT may be electrically connected to the first electrode of the organic light emitting diode OLED, and may be a source node or a drain node. The second node N2 of the driving transistor DRT may be electrically connected to a source node or a drain node of the switching transistor SWT, and may be a gate node. The third node N3 of the driving transistor DRT may be electrically connected to a driving voltage line (DVL) supplying the driving voltage EVDD, and may be a drain node or a source node.

The driving transistor DRT and the switching transistor SWT may be implemented as an n-type or a p-type as illustrated in FIG. 2 .

The switching transistor SWT may be electrically connected between the data line DL and the second node N2 of the driving transistor DRT, and may be controlled by receiving the scan signal SCAN through the gate line as a gate node. .

The switching transistor SWT is turned on by the scan signal SCAN to transfer the data voltage Vdata supplied from the data line DL to the second node N2 of the driving transistor DRT.

The storage capacitor Cstg may be electrically connected between the first node N1 and the second node N2 of the driving transistor DRT.

The storage capacitor Cstg is not a parasitic capacitor (eg, Cgs, Cgd) that is an internal capacitor that exists between the first node N1 and the second node N2 of the driving transistor DRT, It is an external capacitor intentionally designed outside the driving transistor (DRT).

On the other hand, in the case of the organic light emitting display device 100 according to the present exemplary embodiments, as the driving time of each subpixel SP increases, the circuit elements such as the organic light emitting diode (OLED) and the driving transistor (DRT) are Degradation may proceed.

Accordingly, unique characteristic values (eg, threshold voltage, mobility, etc.) of circuit elements such as organic light emitting diodes (OLEDs) and driving transistors (DRTs) may change.

A change in the characteristic value of such a circuit element causes a change in luminance of a corresponding sub-pixel. Accordingly, the change in the characteristic value of the circuit element can be used in the same concept as the change in the luminance of the sub-pixel.

In addition, the degree of change in the characteristic value between the circuit elements may be different depending on the difference in the degree of deterioration of each circuit element.

The deviation of the characteristic values between the circuit elements causes the luminance deviation between the sub-pixels. Accordingly, the characteristic value deviation between circuit elements may be used as the same concept as the luminance deviation between sub-pixels.

The above-described change in sub-pixel luminance and luminance deviation between sub-pixels may cause problems such as lowering the accuracy of the luminance expressive power of the sub-pixel or generating a screen abnormality.

Here, the characteristic value (hereinafter, also referred to as “sub-pixel characteristic value”) of the circuit element may include, for example, the threshold voltage and mobility of the driving transistor DRT, and in some cases, the organic light emitting diode (OLED). may include a threshold voltage of

The organic light emitting diode display 100 according to the present exemplary embodiments includes a sensing function for sensing (measuring) a change in sub-pixel luminance and a luminance deviation between sub-pixels (a change in a characteristic value of a circuit element and a deviation in a characteristic value between circuit elements), and a sensing result. A compensation function for compensating for sub-pixel luminance change and sub-pixel luminance deviation can be provided.

The organic light emitting diode display 100 according to the present embodiments includes a sub-pixel structure suitable for the sub-pixel structure and a sensing and compensation structure in order to provide a function of sensing and compensating for a change in sub-pixel luminance and a luminance deviation between sub-pixels. Compensation circuit is included.

Referring to FIG. 2 , each subpixel disposed in the organic light emitting display panel 110 according to the present exemplary embodiments includes, for example, an organic light emitting diode (OLED), a driving transistor (DRT), a switching transistor (SWT), and a storage device. In addition to the capacitor Cstg, a sensing transistor SENT may be further included.

Referring to FIG. 2 , the sensing transistor SENT is electrically connected between the first node N1 of the driving transistor DRT and the sensing line SL supplying a reference voltage Vref, and a gate node It may be controlled by receiving a sensing signal SENSE, which is a kind of raw scan signal.

The sensing transistor SENT is turned on by the sensing signal SENSE and applies the reference voltage Vref supplied through the sensing line SL to the first node N1 of the driving transistor DRT.

Also, the sensing transistor SENT may be used as one of the voltage sensing paths for the first node N1 of the driving transistor DRT.

In the organic light emitting display device 100 according to the present embodiments, the sensing line SL serves to transmit a reference voltage Vref for image display during a display mode period (image display mode period), and display sensing During the mode period (sub-pixel characteristic sensing mode period), it serves to transmit the reference voltage Vref for sensing the sub-pixel characteristic value.

Also, as will be described later, in the organic light emitting display device 100 according to the present exemplary embodiments, the sensing line SL transmits a touch driving signal to the touch electrode TE or transmits the touch sensing signal to the touch circuit during the touch sensing mode section. It is a multi-purpose signal line that can also serve as a transmission of touch-related signals.

Meanwhile, the scan signal SCAN and the sensing signal SENSE may be separate gate signals. In this case, the scan signal SCAN and the sensing signal SENSE may be respectively applied to the gate node of the switching transistor SWT and the gate node of the sensing transistor SENT through other gate lines.

In some cases, the scan signal SCAN and the sensing signal SENSE may be the same gate signal. In this case, the scan signal SCAN and the sensing signal SENSE may be commonly applied to the gate node of the switching transistor SWT and the gate node of the sensing transistor SENT through the same gate line.

Referring to FIG. 3 , in the organic light emitting diode display 100 according to the present exemplary embodiments, changes in sub-pixel characteristics (characteristics of driving transistors and characteristics of organic light emitting diodes) and/or sub-pixel characteristics during the display sensing mode period A sensing unit 310 that senses the deviation between the values and outputs the sensed data, a memory 320 that stores the sensed data, and a compensation that compensates for a change in sub-pixel characteristics and/or a deviation between sub-pixel characteristics by using the sensed data It may include a compensation unit 330 that performs the process, and the like.

The sensing unit 310 may be implemented by including at least one analog to digital converter (ADC).

Each analog-to-digital converter (ADC) may be included inside the source driver integrated circuit SDIC, and in some cases, may be included outside the source driver integrated circuit SDIC.

The compensator 320 may be included inside the controller 140 , and in some cases, may be included outside the controller 140 .

The sensing data output from the sensing unit 310 may be, for example, in a low voltage differential signaling (LVDS) data format.

In the organic light emitting diode display 100 according to the present exemplary embodiments, in order to control sensing driving, that is, the voltage application state of the first node N1 of the driving transistor DRT in the sub-pixel SP is determined as a sub-pixel characteristic value. In order to control the state required for sensing, the switching unit SW including at least one type of switch may be further included.

The switching unit SW may include a first switch connecting the sensing line SL and the reference voltage supply node. Whether the reference voltage Vref is supplied to the sensing line SL by the first switch can be controlled.

When the first switch is turned on, the reference voltage Vref is supplied to the sensing line SL to be applied to the first node N1 of the driving transistor DRT through the turned-on sensing transistor SENT. can

On the other hand, when the voltage of the first node N1 of the driving transistor DRT becomes a voltage state that reflects the sub-pixel characteristic value, the sensing line SL that may be at the same potential as the first node N1 of the driving transistor DRT. ) may also be in a voltage state reflecting the sub-pixel characteristic value. In this case, a voltage reflecting the sub-pixel characteristic value may be charged to the line capacitor formed on the sensing line SL.

The switching unit SW may include a second switch connecting the sensing line SL and the sensing unit 310 .

When the voltage of the first node N1 of the driving transistor DRT reaches a voltage state reflecting the sub-pixel characteristic, the second switch is turned on to connect the sensing unit 310 and the sensing line SL. .

Accordingly, the sensing unit 310 senses the voltage of the sensing line SL, which is a voltage state reflecting the sub-pixel characteristic, that is, the voltage of the first node N1 of the driving transistor DRT.

When connected to the sensing line SL, the sensing unit 310 senses the voltage of the first node N1 of the driving transistor DRT.

Here, when the sensing transistor SENT is turned on, the voltage of the first node N1 of the driving transistor DRT is equal to or similar to the voltage of the sensing line SL.

Accordingly, the sensing unit 310 may sense the voltage of the first node N1 of the driving transistor DRT by sensing the voltage of the sensing line SL.

For voltage sensing efficiency, the sensing unit 310 may sense the voltage charged in the line capacitor on the sensing line SL, thereby efficiently sensing the voltage of the first node N1 of the driving transistor DRT.

During the display sensing mode period, the voltage sensed by the sensing unit 310 is a voltage value (Vdata-Vth or Vdata-ΔVth) including a threshold voltage Vth or a threshold voltage change ΔVth of the driving transistor DRT, or , may be a voltage value for sensing the mobility of the driving transistor DRT.

Hereinafter, threshold voltage sensing driving and mobility sensing driving of the driving transistor DRT will be briefly described.

FIG. 4 is a diagram for explaining threshold voltage sensing driving in the organic light emitting diode display 100 according to the present exemplary embodiments, and FIG. 5 is a diagram illustrating movement sensing driving in the organic light emitting display device 100 according to the present exemplary embodiments. It is a drawing for

4 and 5 , it is assumed that the first node N1 and the second node N2 of the driving transistor DRT are a gate node and a source node.

Referring to FIG. 4 , when the threshold voltage sensing driving of the driving transistor DRT is performed, the first node N1 and the second node N2 of the driving transistor DRT are respectively driven by the reference voltage Vref and the threshold voltage sensing driving. It is initialized to the data voltage (Vdata) for use.

Thereafter, the first node N1 of the driving transistor DRT floats and the voltage of the first node N1 of the driving transistor DRT increases.

Referring to FIG. 4 , the voltage of the first node N1 of the driving transistor DRT rises for a predetermined time, and then gradually decreases and becomes saturated.

The saturated voltage Vs of the first node N1 of the driving transistor DRT is the difference between the data voltage Vdata and the threshold voltage Vth (which may be a positive value or a negative value) (Vdata-Vth) or the data voltage ( Vdata) and the difference (Vdata-ΔVth) of the threshold voltage change ΔVth.

When the voltage of the first node N1 of the driving transistor DRT is saturated, the sensing unit 310 senses the saturated voltage of the first node N1 of the driving transistor DRT.

The voltage Vsense sensed by the sensing unit 410 is a voltage Vdata-Vth obtained by subtracting the threshold voltage Vth from the data voltage Vdata or a voltage obtained by subtracting the threshold voltage deviation ΔVth from the data voltage Vdata ( Vdata-ΔVth).

Referring to FIG. 5 , during mobility sensing driving, the first node N1 and the second node N2 of the driving transistor DRT respectively have a reference voltage Vref and a data voltage Vdata+Vth_comp for mobility sensing driving. , Vth_comp is a voltage added by threshold voltage compensation made before mobility sensing).

Thereafter, both the first node N1 and the second node N2 of the driving transistor DRT float to increase the voltage of the first node N1 and the second node N2 of the driving transistor DRT. have.

At this time, the voltage rising rate (the amount of change in the voltage rising value with respect to time ΔV) represents the current capability of the driving transistor DRT, that is, the mobility.

Accordingly, as the driving transistor DRT has a large current capability (mobility), the voltage at the first node N1 of the driving transistor DRT rises more steeply.

The sensing unit 310 increases the voltage Vs of the first node N1 of the driving transistor DRT, that is, the first node N1 of the driving transistor DRT after the voltage rises for a predetermined period of time. ) senses the voltage of the sensing line SL in which the voltage rises with the rise of the voltage.

According to the threshold voltage or mobility sensing driving described above with reference to FIGS. 4 and 5 , the sensing unit 310 converts the sensed voltage Vsense for threshold voltage sensing or mobility sensing into a digital value, and the converted digital It generates and outputs sensing data including values.

The sensing data output from the sensing unit 310 may be stored in the memory 320 or provided to the compensator 330 .

The compensator 330 is configured to perform a characteristic value (eg, threshold voltage, mobility) or a driving transistor (DRT) of a driving transistor (DRT) in a corresponding subpixel based on sensing data stored in the memory 320 or provided from the sensing unit 310 . change in the characteristic value (eg, change in threshold voltage, change in mobility), and perform a characteristic value compensation process.

Here, the change in the characteristic value of the driving transistor DRT may mean that the current sensed data is changed based on the previous sensed data or that the current sensed data is changed based on the reference sensed data.

Here, by comparing a characteristic value or a characteristic value change between the driving transistors DRT, a characteristic value deviation between the driving transistors DRT can be grasped. When the change in the characteristic value of the driving transistor DRT means that the current sensed data is changed based on the reference sensing data, the characteristic value deviation between the driving transistors DRT from the change in the characteristic value of the driving transistor DRT (that is, the sub-pixel luminance deviation) can also figure out

The characteristic value compensation process may include a threshold voltage compensation process for compensating for a threshold voltage of the driving transistor DRT and a mobility compensation process for compensating for mobility of the driving transistor DRT.

The threshold voltage compensation process calculates a compensation value for compensating for a threshold voltage or a threshold voltage deviation (threshold voltage change), and stores the calculated compensation value in the memory 320, or uses the calculated compensation value as the image data (Data) It may include processing to change the .

The mobility compensation process calculates a compensation value for compensating for mobility or mobility deviation (mobility change), and stores the calculated compensation value in the memory 320, or uses the calculated compensation value as the corresponding image data (Data) It may include processing to change the .

The compensator 330 may change the image data through threshold voltage compensation processing or mobility compensation processing and supply the changed data to the corresponding source driver integrated circuit SDIC in the data driver 120 .

Accordingly, the source driver integrated circuit SDIC converts the changed data into a data voltage and supplies it to the corresponding sub-pixel, so that sub-pixel characteristic value compensation (threshold voltage compensation, mobility compensation) is actually performed.

During the display sensing mode period, as the above-described sub-pixel characteristic value compensation is performed, image quality may be improved by reducing or preventing a luminance deviation between sub-pixels.

6 is an exemplary arrangement view of two or more sensing lines SL disposed on the organic light emitting display panel 110 according to the present exemplary embodiment.

Referring to FIG. 6 , two or more sensing lines SL #1, SL #2, ... are reference voltages for a display sensing driving purpose or a display purpose (image display driving purpose) during a display sensing mode period or during a display mode period. It serves as a reference voltage line that transfers (Vref) to the corresponding sub-pixel.

These two or more sensing lines SL #1, SL #2, ... may be disposed parallel to the data line.

The two or more sensing lines SL #1, SL #2, ... may be arranged one for each sub-pixel column, or in some cases, one for every two or more sub-pixel columns.

6 is a layout view exemplifying a case in which two or more sensing lines SL #1, SL #2, ... are arranged one for every four sub-pixel columns.

Referring to FIG. 6 , when one pixel is composed of four sub-pixels (a red sub-pixel, a white sub-pixel, a green sub-pixel, and a blue sub-pixel), two or more sensing lines SL #1, SL #2, ... ) may be arranged one for every one pixel column including four subpixel columns (a red subpixel column, a white subpixel column, a green subpixel column, and a blue subpixel column).

Meanwhile, the organic light emitting diode display 100 according to the present exemplary embodiments includes a display mode for displaying an image (also referred to as a display driving mode or an image display mode) and a display sensing mode for sensing sub-pixel characteristics (sub-pixel characteristic values). It can operate in sensing mode or sub-pixel characteristic compensation mode or display compensation mode).

In addition, the organic light emitting display device 100 according to the present exemplary embodiments may provide a touch input function, and for this purpose, a function of sensing a touch may be provided.

Accordingly, the organic light emitting diode display 100 according to the present exemplary embodiments may operate in a touch sensing mode (also referred to as a touch driving mode).

Hereinafter, with reference to FIG. 7 , the timing at which the organic light emitting diode display 100 according to the present embodiments operates in the display mode, the display sensing mode, and the touch sensing mode will be described as an example.

7 is a diagram illustrating an operation mode of the organic light emitting diode display 100 according to the present exemplary embodiments.

Referring to FIG. 7 , the organic light emitting diode display 100 may operate in a display sensing mode after a power-off signal is generated according to a power-off request of a user.

After the power-off signal is generated, the display sensing mode may be referred to as a mode in which off-sensing is performed.

Also, the organic light emitting diode display 100 may operate in the display sensing mode before the power-off signal is generated, that is, during each display mode period Pd for displaying an image.

As described above, the display sensing mode for each display mode section Pd may be referred to as a mode in which on-sensing is performed.

Referring to FIG. 7 , after the display mode period Pd, a touch sensing mode period Pts may proceed.

Referring to FIG. 7 , between the display mode period Pd and the touch sensing mode period Pts, the display sensing mode period Pds_on corresponding to the on-sensing mode may or may not proceed.

Referring to FIG. 7 , after the power-off signal is generated, the display sensing mode Pds_off corresponding to the off-sensing mode may proceed.

Here, the on-sensing mode may be, for example, a mobility sensing mode, and in some cases may be a threshold voltage sensing mode.

In addition, the off-sensing mode may be, for example, a threshold voltage sensing mode, and in some cases may be a mobility sensing mode.

Hereinafter, a method in which the organic light emitting diode display 100 according to the present embodiments operates in the touch sensing mode and a touch sensing system therefor will be described in detail.

8 is a diagram schematically illustrating a touch sensing system in the organic light emitting diode display 100 according to the present exemplary embodiments.

Referring to FIG. 8 , in the organic light emitting display device 100 according to the present exemplary embodiments, a plurality of touch electrodes TE serving as touch sensors are embedded in the organic light emitting display panel 110 . Cell) may be a touch type.

Referring to FIG. 8 , the touch sensing system of the in-cell touch type organic light emitting display device 100 according to the present embodiments includes a plurality of touch electrodes TE built into the organic light emitting display panel 110 ; During the touch sensing mode period, the touch circuit 800 sequentially outputs the touch driving signals TDS to be sequentially applied to the plurality of touch electrodes TE, and during the touch sensing mode period, the touch circuit 800 sequentially It may include two or more sensing lines SL for sequentially transmitting the output touch driving signal TDS to the plurality of touch electrodes TE.

The plurality of touch electrodes TE may be arranged in a matrix type (x*y) of x columns and y rows.

That is, x*y touch electrodes TE are arranged in a matrix type on the organic light emitting display panel 110 .

Here, the two or more sensing lines SL are signal lines that electrically connect the touch circuit 800 and the plurality of touch electrodes TE, and during the touch sensing mode period, a touch driving signal output from the touch circuit 800 . The TDS may be sequentially transferred to the plurality of touch electrodes TE.

These two or more sensing lines SL are also signal lines used in the display sensing mode or the display mode, as described above with reference to FIGS. 2 and 3 .

That is, the two or more sensing lines SL may transmit display sensing related voltages to the two or more sub-pixels during the display sensing mode period.

Here, the display sensing related voltage may be a reference voltage Vref used to initialize the first node N1 of the driving transistor DRT during threshold voltage sensing or mobility sensing driving.

Also, the two or more sensing lines SL may transmit display-related voltages to the two or more sub-pixels during the display mode period.

Here, the display-related voltage may be a reference voltage Vref used to initialize the first node N1 of the driving transistor DRT for light emission of a corresponding sub-pixel.

As described above, in the display sensing mode, the sensing line SL used for display sensing driving (sub-pixel characteristic sensing driving) is connected to a touch-related signal (eg, TDS, TSS) between the touch circuit 800 and the touch electrode TE. etc.), that is, by using the sensing line SL as a signal line required for the display sensing mode and the touch sensing mode in common, the number of signal lines in the organic light emitting display panel 110 can be reduced. Thereby, it is possible to increase the panel aperture ratio.

As described above, in the organic light emitting diode display 100 , each sub-pixel includes an organic light emitting diode (OLED), a driving transistor (DRT) driving the organic light emitting diode (OLED), and a gate node of the driving transistor (DRT). The switching transistor SWT supplies the data voltage Vdata to the second node N2 corresponding to ) may include a storage capacitor Cstg connected between the gate node N2.

The display sensing-related voltage transferred through the sensing line SL in the display sensing mode section is applied to the first node N1 corresponding to the source node or the drain node of the driving transistor DRT in each of the two or more subpixels. The reference voltage Vref may be used for display sensing (threshold voltage sensing or mobility sensing).

As described above, the two or more sensing lines SL may transmit a display-related voltage to each of the two or more sub-pixels during the display mode period, wherein the display-related voltage is applied to each of the two or more sub-pixels in the display mode period. may be the reference voltage Vref applied to the source node or the drain node of the driving transistor DRT.

As described above, a touch-related signal (eg, TDS, TSS, etc.) is transmitted between the touch circuit 800 and the touch electrode TE through the sensing line SL used for image display driving (display driving) in the display mode. By using it for a purpose, that is, by using the signal lines required for various modes in common, it is possible to easily manufacture the panel and increase the aperture ratio of the panel.

Meanwhile, each sensing line SL may be electrically connected to a first node N1 corresponding to a source node or a drain node of the driving transistor DRT in each subpixel through the sensing transistor SENT.

When the above-described sensing transistor SENT is used, the voltage state of the first node N1 of the driving transistor DRT may be efficiently controlled in the display sensing mode or the display mode. In addition, when the sensing line SL and the touch electrode TE are connected in the touch sensing mode period, the effect of the sub-pixel may be reduced by turning off the sensing transistor SENT.

9 is a diagram illustrating a structure in which a touch sensing system and a display sensing system are connected in the organic light emitting display device 100 according to the present embodiments, and FIG. , a diagram briefly illustrating a display sensing operation, and FIG. 11 is a diagram briefly illustrating a touch sensing operation in the organic light emitting diode display 100 according to the present exemplary embodiment.

Referring to FIG. 9 , the organic light emitting diode display 100 according to the present exemplary embodiments may include a touch sensing system for touch sensing and a display sensing system for display sensing (subpixel characteristic sensing).

The display sensing system includes a driving circuit (a data driver, a gate driver, a controller, etc.) for driving the display sensing of a sub-pixel, a sensing line SL, a display sensing unit ADC, and the like.

The touch sensing system includes a touch circuit 800 , a touch electrode TE, a sensing line SL, and the like.

As such, the sensing line SL is a common component of the touch sensing system and the display sensing system.

Accordingly, the touch sensing system and the display sensing system need to be organically linked and operated.

The organic light emitting diode display 100 according to the present exemplary embodiments may include two types of switch elements for a link operation between the touch sensing system and the display sensing system.

First, referring to FIG. 9 , two types of switch elements for a link operation between the touch sensing system and the display sensing system are a touch detection control transistor TQ for controlling the connection between the touch electrode TE and the sensing line SL. ) may be included.

The touch detection control transistor TQ corresponds to each of the two or more touch electrodes TE. That is, one touch detection control transistor TQ exists for each one touch electrode TE.

Referring to FIG. 11 , the touch detection control transistor TQ may be turned on during the touch sensing mode period to connect one touch electrode TE and one sensing line SL.

Accordingly, the sensing line SL may operate as a signal line in the touch sensing mode.

Accordingly, the touch driving signal TDS output from the touch circuit 800 may be transmitted to the corresponding touch electrode TE through the corresponding sensing line SL, and the corresponding touch electrode TE may be driven.

In addition, according to the driving of the touch electrode TE, the touch sensing signal TSS according to the capacitor change related to the touch electrode TE is transmitted to the touch circuit 800 through the corresponding sensing line SL to perform touch sensing. can

Referring to FIG. 10 , the touch detection control transistor TQ may be turned off in the display sensing mode period.

Accordingly, the sensing line SL may operate as a signal line in the display sensing mode because the touch electrode TE is not connected.

As described above, depending on the turn-on or turn-off of the touch detection control transistor TQ, the sensing line SL operates as a signal line required for the touch sensing mode or operates as a signal line required for the display sensing mode. can

Next, referring to FIG. 9 , as for two types of switch elements for a link operation between the touch sensing system and the display sensing system, the sensing line SL is connected to the display sensing unit ADC or the touch circuit 800 is It may further include a sensing type control switch (STM) for controlling the connection.

Referring to FIG. 10 , the sensing type control switch STM may electrically connect each of the two or more sensing lines SL to the display sensing unit ADC during the display sensing mode section.

Accordingly, the display sensing unit ADC may sense a characteristic value or a characteristic value change of a sub-pixel that is sensing driving among four sub-pixels electrically connected to each sensing line SL through the corresponding sensing line SL. can

At this time, the touch detection control transistor TQ is turned off.

Referring to FIG. 11 , the sensing type control switch STM may electrically connect each sensing line SL to the touch circuit 800 in the touch sensing mode section.

At this time, the touch detection control transistor TQ is turned on.

Accordingly, the touch circuit 800 may drive (touch drive) the desired touch electrode TE through the corresponding sensing line SL and sense the touch electrode TE (touch sensing).

As described above, by using the sensing type control switch STM, display sensing or touch sensing may be performed according to a sensing type selected from display sensing and touch sensing.

Meanwhile, in one sensing line SL, a plurality of touch detection control transistors TQ may be sequentially turned on to be sequentially connected to a plurality of touch electrodes TE belonging to one touch electrode column.

In consideration of this, the sensing type control switch STM is synchronized with the timing at which each sensing line SL is sequentially connected to the plurality of touch electrodes TE during the touch sensing mode period, and each sensing line SL ) may be sequentially connected to the touch circuit 800 .

In this case, the plurality of touch detection control transistors TQ sequentially connecting each sensing line SL with the plurality of touch electrodes TE are synchronized with the turn-on timing and the turn-off timing, respectively, so that the sensing type The control switch STM may repeat turn-on and turn-off.

That is, the turn-on voltage level section for the control signal (gate signal) of the sensing type control switch STM corresponds to the turn-on voltage level section of each of the plurality of touch detection control transistors TQ.

According to another on-off method of the sensing type control switch STM, in the sensing type control switch STM, during the touch sensing mode period, one sensing line SL is sequentially connected to the plurality of touch electrodes TE. During the connection time, one sensing line SL may be continuously connected to the touch circuit 800 .

In this case, the turn-on voltage level section for the control signal (gate signal) of the sensing type control switch STM may correspond to the total length of each turn-on voltage level section of the plurality of touch detection control transistors TQ. can

As described above, by controlling the sensing type control switch (STM), during the touch sensing mode period, the operation speed of the touch circuit 800 or other switching elements for a process such as touch sensing driving or touch sensing is taken into consideration. , it is possible to enable efficient touch driving and touch sensing for a plurality of touch electrodes TE connectable to one sensing line SL.

As described above, during the display sensing mode period, the touch detection control transistor TQ is turned off, and the sensing line SL is connected to the display sensing unit ADC by the sensing type control switch STM.

Accordingly, the display sensing unit ADC senses a characteristic value or a characteristic value change for each of two or more sub-pixels to which the display sensing related voltage Vref is transmitted through the corresponding sensing line SL during the display sensing mode period. It can be sensed through the line SL.

As described above, during the touch sensing mode period, the touch detection control transistor TQ is turned on, and the sensing line SL is connected to the touch circuit 800 by the sensing type control switch STM.

Accordingly, the touch circuit 800 receives the touch sensing signal TSS from the touch electrode TE to which the touch driving signal TDS is applied through the sensing line SL during the touch sensing mode section. ) can be sensed.

As described above, the organic light emitting diode display 100 according to the present exemplary embodiments can efficiently operate in the touch sensing mode and the display sensing mode in different time intervals.

Hereinafter, the touch sensing system described above will be described in more detail.

12 is a view for explaining a region of each touch electrode TE embedded in the organic light emitting display panel 110 according to the present exemplary embodiment.

As shown above with reference to FIG. 8 , x*y touch electrodes TE built in the organic light emitting display panel 110 according to the present embodiments are arranged in a matrix type with x columns and y rows. (at least one of x and y is a natural number greater than or equal to 2).

Here, x is the number of touch electrode columns in the organic light emitting display panel 110 . y is the number of touch electrode rows in the organic light emitting display panel 110 .

Meanwhile, referring to FIG. 12 , each of the x*y touch electrodes TE corresponds to a subpixel area arranged in m columns and y rows (m and n may be natural numbers greater than or equal to 1, and may be the same or different from each other). value).

That is, an area of one touch electrode TE corresponds to an area occupied by m*n sub-pixels.

Accordingly, in the subpixel region arranged in m columns and y rows, it can be said that there are m subpixel columns, or it can be said that there are n subpixel rows.

Here, m is the number of subpixel columns disposed in an area occupied by one touch electrode TE. n is the number of subpixel rows disposed in an area occupied by one touch electrode TE. m and n may be the same or different values.

Accordingly, the size of the area of one touch electrode TE may be equal to or greater than the sum of area sizes occupied by m*n subpixels.

As described above, the area of each touch electrode TE may correspond to the area of one sub-pixel or may correspond to the area of two or more sub-pixels. According to the desired efficiency of touch driving and touch sensing, one The number of sub-pixels corresponding to the area of the touch electrode TE may be adjusted.

On the other hand, when two or more sensing lines SL are disposed in the organic light emitting display panel 110 according to the present embodiments, one for every four sub-pixel columns, an area occupied by one touch electrode column is m/4 Five sensing lines SL may be disposed.

That is, as shown in FIG. 12 , m/4 sensing lines SL #1, SL #2, ..., SL #m/4 are formed in an area occupied by one touch electrode TE.

Accordingly, (1/4)×m×x sensing lines SL may be disposed in the entire organic light emitting display panel 110 according to the present exemplary embodiments.

As described above, a suitable number or size of the touch electrodes TE may be designed according to touch driving and touch sensing efficiency (eg, touch sensing speed, etc.).

Meanwhile, according to the above description, the number of sensing lines SL corresponding to one touch electrode column may be less than the number y (the number of touch electrode rows) of the touch electrodes TE constituting one touch electrode column.

In this case, one sensing line SL should be sequentially connected to two or more touch electrodes.

Accordingly, the touch circuit 800 must time-division and drive k (k is a natural number greater than or equal to 2) touch electrodes TE through one sensing line SL.

Here, k is the number of touch electrodes TE connectable to one sensing line SL and time-divisionally driven, and may be the number of time-division driven touch electrodes TE of one sensing line SL.

Such k may be set as a natural number satisfying Equation 1 below.

In Equation 1, m is the number of subpixel columns disposed in the area occupied by one touch electrode TE, and x is the number of touch electrode columns in the organic light emitting display panel 110 . Accordingly, m*x is the total number of sub-pixel columns in the organic light emitting display panel 110 , and (1/4)*m*x is the total number of sensing lines SL in the organic light emitting display panel 110 . And, y is the number of touch electrode rows in the organic light emitting display panel 110 . x*y is the total number of touch electrodes TE in the organic light emitting display panel 110 .

As described above, the number (m/4) of the sensing lines SL corresponding to one touch electrode column is higher than the number (y, y = number of touch electrode rows) of the touch electrodes TE constituting one touch electrode column. In a small case, that is, compared to the total number (x*y) of the touch electrodes TE in the organic light emitting display panel 110 , the total number ((1/4)*m*x) of the sensing lines SL is Even in a small case, touch driving and touch sensing may be normally performed.

In this specification, one touch electrode TE is defined as corresponding to m*n sub-pixels, m is defined as the number of sub-pixel columns disposed in an area occupied by one touch electrode TE, and n is It was defined as the number of sub-pixel rows arranged in an area occupied by one touch electrode TE.

Unlike this sub-pixel perspective, from the pixel perspective, one touch electrode TE is defined as corresponding to m*n pixels, and m is the number of pixel columns disposed in the area occupied by one touch electrode TE. , and n may be defined as the number of pixel rows disposed in an area occupied by one touch electrode TE. In this case, Equation 1 may be changed to m*x*k ≥ x*y.

Also, in the touch sensing mode section, each sensing line SL used for touch driving and touch sensing may be disposed to correspond to one subpixel column or two or more subpixel columns.

As described above, in consideration of the arrangement characteristics of the sensing lines SL, the number of sensing lines SL may be adjusted according to a desired touch driving and touch sensing efficiency in the touch sensing system according to the present embodiments.

13 is a layout view of one touch electrode column and sensing lines SL #1, SL #2, ..., SL #m/4 disposed corresponding thereto in the organic light emitting display panel 110 according to the present exemplary embodiments. As a diagram, one touch electrode column among the x number of touch electrode columns in FIG. 8 is shown. 14 is a diagram illustrating a connection structure of one touch electrode TE and one sensing line SL.

Referring to FIG. 13 , m/4 sensing lines SL #1, SL #2, ..., SL #m/4 are disposed in one touch electrode column including y touch electrodes TE.

According to Equation 1, when the k value is set, the touch circuit 800 time-divisionally drives the k touch electrodes TE through one sensing line.

In this case, touch electrodes that are time-division driven together through one sensing line are referred to as one touch electrode group.

Referring to FIG. 13 , k touch electrodes that are time-division driven together through the sensing line SL #1 belong to the touch electrode group GR1. The k touch electrodes that are time-division driven together through the sensing line SL #2 belong to the touch electrode group GR2. The k touch electrodes that are time-division driven together through the sensing line SL #m/4 or the number of touch electrodes smaller than k belong to the touch electrode group GRm/4.

Referring to FIG. 13 , according to Equation 1, when the value obtained by dividing x*y by (1/4)*m*x is not a natural number, the touch electrode that is time-division driven together through the sensing line SL #m/4 The number may be a number smaller than k.

Referring to FIG. 13 , each touch electrode TE is connected to a corresponding sensing line SL at a contact point CNT through a touch detection control transistor TQ.

Referring to FIG. 14 , each touch detection control transistor TQ is turned on by a touch detection control signal Vdet applied to the gate node according to the touch sensing timing within the touch sensing mode section, and the corresponding sensing line ( SL) and the corresponding touch electrode TE may be connected.

Accordingly, the sensing line SL commonly used in the touch sensing mode section and the display sensing mode section may or may not be connected to the touch electrode TE according to each of the touch sensing mode section and the display sensing mode section.

Referring to FIG. 14 , during the display sensing mode period, the touch detection control transistor TQ is turned off by the low level voltage of the touch detection control signal Vdet. Accordingly, the display sensing unit ADC operates through the sensing line SL, a first sub-pixel including four sub-pixels OLED1, DRT1, SENT1, and the like, a second sub-pixel including OLED2, DRT2, SENT2, etc., OLED3 , DRT3, SENT3, etc., and the fourth sub-pixel including OLED4, DRT14, SENT4, etc.) of one sub-pixel) or a characteristic value change may be sensed.

Hereinafter, the structure of the touch sensing system will be exemplarily described with reference to FIGS. 15 to 17 , taking the case in which the organic light emitting display panel 110 is designed with 3840*2160 sub-pixels as an example.

15 shows that 3840*2160 sub-pixels are arranged in the organic light emitting display panel 110 according to the present embodiments, one sensing line SL is shared for every four sub-pixel columns, and one touch electrode TE ) is an exemplary view showing one row of touch electrodes TE and one touch electrode TE when they are arranged to correspond to 20 * 20 sub-pixels.

Referring to FIG. 15 , when 3840*2160 sub-pixels are disposed in the organic light emitting display panel 110 and one sensing line is disposed in every 4 sub-pixel columns, the organic light emitting display panel 110 has 960 ( =3840/4) of the sensing line SL exists.

15 , when one touch electrode TE corresponds to 20 * 20 sub-pixels, that is, when m and n are 20, the organic light emitting display panel 110 has 192 * 108 touch electrodes ( TE) exists.

That is, there are 192 rows of touch electrodes in the organic light emitting display panel 110 . Also, it can be said that 108 rows of touch electrodes exist in the organic light emitting display panel 110 (x=3840/20=192, y=2160/20=108).

Referring to FIG. 15 , one touch electrode column includes 108 touch electrodes TE 1 , TE 2 , ... , TE 108 .

The number of sensing lines arranged to correspond to one touch electrode column is 5 (=m/4=20/5).

Referring to FIG. 15 , five sensing lines SL #1, SL #2, SL #3, SL #4, and SL #5 are disposed in an area occupied by one row of touch electrodes.

Referring to FIG. 15 , one touch electrode column includes 108 touch electrodes TE 1 , TE 2 , ... , TE 108 , but in the area occupied by one touch electrode column, five sensing lines SL #1, Only SL #2, SL #3, SL #4, SL #5) are placed.

Accordingly, according to Equation 1, k, which is the number of touch electrodes that one sensing line can process, becomes 22.

Referring to FIG. 15 , through the sensing line SL #1, 22 touch electrodes TE 1 , ... , TE 22 belonging to GR1 are time-division driven. That is, the sensing line SL #1 is connected to the 22 touch electrodes TE 1, ... , TE 22) and sequentially connected.

Referring to FIG. 15 , through the sensing line SL #2, 22 touch electrodes TE 23 , ... , TE 44 belonging to GR2 are time-division driven. That is, the sensing line SL #2 has 22 touch electrodes TE 23, ... , TE 44) and sequentially connected.

Referring to FIG. 15 , through the sensing line SL #3, 22 touch electrodes TE 45, ..., TE 66 belonging to GR3 are time-division driven. That is, the sensing line SL #3 is the 22 touch electrodes TE 45, ... through the 22 contact points CNT 45, ..., CNT 66 according to the sequential turn-on of the 22 touch detection control transistors TQ. , TE 66) and sequentially connected.

Referring to FIG. 15 , through the sensing line SL #4, 22 touch electrodes TE 67, ..., TE 88 belonging to GR4 are time-division driven. That is, the sensing line SL #4 is connected to the 22 touch electrodes TE 67, ... , TE 88) and sequentially connected.

Referring to FIG. 15 , through the sensing line SL #5, 20 touch electrodes TE 89, ..., TE 108 belonging to GR5 are time-division driven. That is, the sensing line SL #5 is connected to the 20 touch electrodes TE 89, . , TE 108) and sequentially connected.

16 and 17 show time division driving of the touch electrode group GR1 connectable to SL #1 and the touch electrode group GR2 connectable to SL #2 in the one touch electrode TE column illustrated in FIG. 15 . It is a drawing for explaining the method.

Referring to FIG. 16 , through the sensing line SL #1, 22 touch electrodes TE 1 , TE 2 , TE 3 , ... , TE 22 belonging to GR1 are time-division driven. That is, the sensing line SL #1 has 22 contact points (CNT 1, CNT 2, CNT) according to the sequential turn-on of the 22 touch detection control transistors (TQ 1, TQ 2, TQ 3, ..., TQ 22). 3, ..., CNT 22) are sequentially connected to the 22 touch electrodes TE 1, TE 2, TE 3, ..., TE 22.

Referring to FIG. 16 , through the sensing line SL #2, 22 touch electrodes TE 23 , TE 24 , TE 25 , ... , TE 44 belonging to GR2 are time-division driven. That is, the sensing line SL #2 has 22 contact points (CNT 23, CNT 24, CNT) according to the sequential turn-on of the 22 touch detection control transistors (TQ 23, TQ 24, TQ 25, ..., TQ 44). 25, ..., CNT 44) are sequentially connected to the 22 touch electrodes TE 23, TE 24, TE 25, ..., TE 44.

Referring to FIG. 17 , in the touch driving and sensing period for the touch electrode group GR1 connectable to SL #1, the gates of 22 touch detection control transistors TQ 1 , TQ 2 , TQ 3 , ... , TQ 22 . Twenty-two touch detection control signals Vdet 1, Vdet 2, Vdet 3, ..., Vdet 22 are sequentially applied to the node.

When the touch driving and sensing period for the touch electrode group GR1 connectable to SL #1 is completed, the touch driving and sensing period for the touch electrode group GR2 connectable to SL #2 is performed.

During the touch driving and sensing period for the touch electrode group GR2 connectable to SL #2, the gate nodes of the 22 touch detection control transistors TQ 23, TQ 24, TQ 25, ..., TQ 44 detect 22 touches. Control signals Vdet 23, Vdet 24, Vdet 25, ..., Vdet 44 are sequentially applied.

In the above, it has been described that the touch detection control signal is sequentially applied, but in some cases, it may be applied non-sequentially.

18 is a diagram for explaining the principle of detecting the presence or absence of a touch by the touch circuit 800 of the organic light emitting display device 100 according to the present exemplary embodiment.

Referring to FIG. 18 , in the touch sensing mode section, when the touch electrode TE and the sensing line SL are connected by the time-divided touch detection control signal Vdet, the touch circuit 800 connects the sensing line SL. A touch driving signal (touch detection signal) is applied to the touch electrode TE through the

Referring to FIG. 18 , due to the capacitor Cts formed between the touch electrode TE and the sensing line SL, the potential difference VREF across the parasitic capacitor Cp of the sensing line SL may vary.

A potential difference variation ΔVREF across the parasitic capacitor Cp of the sensing line SL is expressed by Equation 2 below.

In Equation 2, Cts is a capacitor between the touch electrode TE and the sensing line SL, Ct is a capacitor by touch, Cp is a parasitic capacitor of the sensing line SL, and VREF is the potential difference between both ends of the parasitic capacitor.

The touch circuit 800 may detect the presence or absence of a touch based on the total position variation ΔVREF.

19 is a cross-sectional view of a connection point between the touch electrode TE and the touch detection control transistor TQ in the organic light emitting display panel 110 according to the present exemplary embodiment.

Referring to FIG. 19 , the source-drain electrode 1917 of the touch detection control transistor TQ is disposed on a different layer from the touch detection control transistor TQ through the corresponding touch electrode TE and the contact hole CNT. may be electrically connected.

19 exemplarily shows a formation method for each of the touch electrode TE and the touch detection control transistor TQ. The touch electrode TE and the touch detection control transistor TQ may be formed in various ways. will be.

Referring to FIG. 19 , a touch electrode TE may be positioned on a substrate 1901 corresponding to a user viewing direction, and a buffer layer 1903 may be positioned on the touch electrode TE.

On the buffer layer 1903 , a light blocking layer 1905 is provided corresponding to a position where the touch detection control transistor TQ is to be formed.

Another buffer layer 1907 is positioned on the light blocking layer 1905 , and an active layer 1909 is positioned thereon.

Both sides of the active layer 1909 may be conductive and serve as source-drain nodes, and the non-conductive portion of the active layer 1909 may serve as a channel.

A gate insulating layer 1911 is positioned on the non-conductive portion of the active layer 1909 , and a gate electrode 1913 is positioned thereon.

In this way, the touch detection control transistor TQ is formed.

An interlayer insulating film 1915 is disposed thereon, and the source-drain electrodes 1917 are in contact with the source-drain nodes of both sides conducted in the active layer 1909 through the interlayer insulating film hole.

Again on top of this, a passivation layer 1919 is located.

Referring to FIG. 19 , one of the source-drain electrodes 1917 corresponding to the touch detection control transistor TQ is connected to the touch electrode TE through the multilayer contact hole CNT.

Referring to FIG. 19 , the other of the source-drain electrodes 1917 corresponding to the touch detection control transistor TQ is connected to the sensing line SL.

As described above, it may be a method for forming the touch electrode TE and the touch detection control transistor TQ on the organic light emitting display panel 110 .

20 shows eight sensing lines SL #1, SL #2, ..., SL #8 and 16 touch electrodes TE 11, TE 12, TE 13 in the organic light emitting display panel 110 according to the present exemplary embodiments. , TE 14, TE 21, TE 22, TE 23, TE 24, TE 31, TE 32, TE 33, TE 34, TE 41, TE 42, TE 43, TE 44) display sensing system and touch It is an exemplary diagram briefly showing a sensing system.

Referring to FIG. 20 , the in-cell touch type organic light emitting display device 100 according to the present exemplary embodiments includes 16 touch electrodes TE embedded in the organic light emitting display panel 110 in which a plurality of sub-pixels are disposed. 11, TE 12, TE 13, TE 14, TE 21, TE 22, TE 23, TE 24, TE 31, TE 32, TE 33, TE 34, TE 41, TE 42, TE 43, TE 44) and organic Eight sensing lines SL #1, SL #2, ..., SL #8 disposed on the light emitting display panel 110, and during the touch sensing mode period, eight sensing lines SL #1, SL #2, ... , SL #8) through 16 touch electrodes (TE 11, TE 12, TE 13, TE 14, TE 21, TE 22, TE 23, TE 24, TE 31, TE 32, TE 33, TE 34, TE 41 , TE 42, TE 43, TE 44) sequentially driving the touch circuit 800 for sensing a touch, and during the display sensing mode period, a display sensing unit (ADC 1) for sensing a characteristic value or a characteristic value change for each sub-pixel , ADC 2) and the like.

As described above, by using the sensing line SL as a signal line required for the display sensing mode and the touch sensing mode in common, the number of signal lines in the organic light emitting display panel 110 can be reduced, and accordingly, the panel aperture ratio can be decreased. can elevate

Referring to FIG. 20 , the in-cell touch type organic light emitting display device 100 according to the present exemplary embodiments includes eight sensing lines SL #1, SL #2, …, SL # in the touch sensing mode section. 8) of 16 touch electrodes (TE 11, TE 12, TE 13, TE 14, TE 21, TE 22, TE 23, TE 24, TE 31, TE 32, TE 33, TE 34, TE 41, TE 42, 16 touch detection control transistors (TQ #1a, TQ #1b, TQ #2a, TQ #2b, TQ #3a, TQ #3b, TQ #4a, TQ #4b) for sequentially connecting to TE 43, TE 44) , TQ #5a, TQ #5b, TQ #6a, TQ #6b, TQ #7a, TQ #7b, TQ #8a, TQ #8b) may be further included.

As described above, the number of touch detection control transistors TQ #1a, TQ #1b, TQ #2a, TQ #2b, TQ #3a, TQ #3b, TQ #4a, TQ #4b, TQ # Depending on the turn-on or turn-off of 5a, TQ #5b, TQ #6a, TQ #6b, TQ #7a, TQ #7b, TQ #8a, TQ #8b), multiple sensing lines SL #1, SL #2, … , SL #8) may operate as a signal line required for the touch sensing mode or operate as a signal line required for the display sensing mode.

Referring to FIG. 20, eight sensing lines SL #1, SL #2, . , SL #8) are sequentially connected to the touch circuit 800, and eight sensing lines SL #1, SL #2, … are connected in the display sensing mode section. , SL #8 may further include sensing type control switches STM #1, STM #2, ..., STM #8 as many as the number of sensing lines connecting the display sensing units ADC 1 and ADC 2 .

As described above, by using the sensing type control switches (STM #1, STM #2, ..., STM #8) as many as the number of sensing lines, display sensing or touch sensing according to one sensing type selected from display sensing and touch sensing Sensing can be done.

21 and 22 are timing diagrams of two types of switch elements (touch detection control transistor, touch type control switch) for connecting the display sensing mode and the touch sensing mode in the organic light emitting diode display according to the present embodiments. . However, for convenience of description, the sensing line SL #1 will be described.

Referring to FIG. 21 , during the touch sensing mode period, the sensing type control switch STM #1 has a sensing line SL #1 connected to two touch electrodes by two touch detection control transistors TQ #1a and TQ #1b. (TE 11, TE 21) is synchronized with the timing to be sequentially connected, it is possible to repeatedly connect and disconnect the sensing line SL #1 to the touch circuit 800.

In this case, the timing and turn-on of the plurality of touch detection control transistors TQ #1a and TQ #1b sequentially connecting the sensing line SL #1 to the two touch electrodes TE 11 and TE 21 are turned on. Synchronized with the off timing, the sensing type control switch STM #1 may repeat turn-on and turn-off.

That is, the turn-on voltage level section for the control signal (gate signal) of the sensing type control switch STM #1 is the turn-on voltage level of each of the two touch detection control transistors TQ #1a and TQ #1b. corresponding to the section.

Referring to FIG. 22 , according to another switch element on-off method, in the sensing type control switch STM #1, during the touch sensing mode period, one sensing line SL #1 connects two touch electrodes TE 11 . , TE 21 ), one sensing line SL #1 may be continuously connected to the touch circuit 800 .

In this case, the turn-on voltage level section for the control signal (gate signal) of the sensing type control switch STM #1 is the turn-on voltage of each of the two touch detection control transistors TQ #1a and TQ #1b. It may correspond to the total length of the level section.

In the in-cell type organic light emitting display device 100 according to the embodiments described above, the touch circuit 800 may be implemented separately from other drivers such as the data driver 120 in the form of a chip, and the data It may be implemented in the form of a chip together with the driver 120 or other drivers.

23 is a block diagram of the touch circuit 800 according to the present embodiments.

Referring to FIG. 23 , in the touch circuit 800 according to the present embodiments, a touch driving signal to be sequentially applied to a plurality of touch electrodes TE built in the organic light emitting display panel 110 during the touch sensing mode section A touch driving unit 2310 that sequentially outputs TDS through a plurality of sensing lines SL disposed on the organic light emitting display panel 110, and a plurality of touch electrodes to which a touch driving signal TDS is sequentially applied ( The touch sensing unit 2320 may include a touch sensing unit 2320 that sequentially receives a touch sensing signal TSS from TE) through a plurality of sensing lines SL and senses a touch.

During a mode period other than the touch sensing mode (eg, the display sensing mode or the display mode), the touch driving unit 2310 and the touch sensing unit 2320 include two or more sensing lines SL that are not connected to the plurality of touch electrodes TE. ) and may not be connected.

As described above, in the structure in which the sensing line SL is commonly used as a signal line required in each of the touch sensing mode section, the display mode section, and the display sensing mode section, the touch circuit 800 that enables touch driving and touch sensing ) can be provided.

24 is a block diagram of a display driver 2400 according to the present exemplary embodiment.

Referring to FIG. 24 , the display driver 2400 according to the present embodiments provides at least one sub-pixel through at least one sensing line SL disposed on the organic light emitting display panel 110 during the display sensing mode period. At least one display sensing unit (ADC) for sensing a characteristic value or a change in characteristic value, and two or more touch electrodes embedded in the organic light emitting display panel 110 through at least one sensing line SL during the touch sensing mode section It may include a touch circuit 800 that senses a touch by driving the TE, and the like.

As described above, the display driver 2400 that enables both the display sensing mode and the touch sensing mode may be provided.

Referring to FIG. 24 , the display driver 2400 connects at least one sensing line SL to at least one display sensing unit ADC in the display sensing mode section, and at least one sensing line in the touch sensing mode section. A sensing type control switch STM for connecting the SL to the touch circuit 800 may be further included.

According to the above-described switching operation of the sensing type control switch STM, the display driver 240 may perform display sensing or touch sensing.

25 is another block diagram of the display driver 2400 according to the present embodiments.

Referring to FIG. 25 , the display driver 2400 according to the present embodiments performs at least one sensing line SL disposed on the organic light emitting display panel 110 during the display mode section or the display sensing mode section, a display driver 2510 for supplying a predetermined voltage (eg, a reference voltage for a display mode or a reference voltage for a display sensing mode) to a source node or a drain node of the driving transistor (DRT) in at least one subpixel; and a touch sensing mode During the period, the touch circuit 800 for supplying the touch driving signal TDS to the at least one touch electrode TE built in the organic light emitting display device 100 through the at least one sensing line SL. can

The display driver 2400 connects the sensing line SL to the display driver 2510, the display sensing unit ADC, or the touch circuit ( 800) and may further include switch elements M1, M2, and M3 for connecting them.

As described above, the display driver 2400 that enables all of the display mode, the display sensing mode, and the touch sensing mode may be provided.

The above-described display driver 2400 may provide a data driving function of the data driver 120 .

In the method of driving the organic light emitting display device 100 according to the present exemplary embodiments described above, two or more sub-pixels through two or more sensing lines SL disposed on the organic light emitting display panel 110 during the display sensing mode section During the step of sensing a characteristic value or a change in characteristic value for each and a touch sensing mode section performed before or after the display sensing mode section, a plurality of embedded in the organic light emitting display panel 110 through two or more sensing lines SL The method may further include the step of sequentially driving the touch electrodes TE to sense the touch, and the like.

In the method of driving the organic light emitting display device 100 according to the present exemplary embodiments, a reference voltage Vref for driving light emission of two or more sub-pixels is applied to two or more sub-pixels through two or more sensing lines SL during a display mode period. The method may further include supplying a source node or a drain node of the driving transistor DRT in each pixel.

By using the driving method of the organic light emitting display device 100 according to the present embodiments, the touch sensing mode, the display sensing mode, and the display mode can be efficiently provided through the sensing line SL corresponding to the common signal line. .

26 is a flowchart of a driving method of the organic light emitting display device 100 according to the present exemplary embodiments.

Referring to FIG. 26 , in the method of driving the organic light emitting display device 100 according to the present exemplary embodiments, a reference voltage ( Vref) to the source node or drain node of the driving transistor DRT in each of the two or more sub-pixels (S2610), and during the touch sensing mode period, the organic light emitting display panel ( Step (S2620) of sequentially driving a plurality of touch electrodes (TE) built in 110) to sense a touch, and two or more sensing lines (SL) disposed on the organic light emitting display panel 110 during the display sensing mode section The step of sensing a characteristic value or a characteristic value change of each of two or more sub-pixels ( S2630 ) may be performed.

27 is another flowchart of a method of driving the organic light emitting display device 100 according to the present exemplary embodiments.

Referring to FIG. 26 , in the method of driving the organic light emitting display device 100 according to the present exemplary embodiments, a reference voltage ( Vref) to the source node or drain node of the driving transistor DRT in each of the two or more sub-pixels (S2710), and two or more sensing lines disposed on the organic light emitting display panel 110 during the display sensing mode period Sensing the characteristic value or characteristic value change of each of the two or more sub-pixels through the SL (S2720), and during the touch sensing mode period, the organic light emitting display panel 110 is embedded through the two or more sensing lines SL. The step of sensing a touch by sequentially driving the plurality of touch electrodes TE ( S2730 ) may proceed.

In step S2630 of the flowchart of FIG. 26 , the display sensing mode section may be a section for off-sensing that is performed after the power-off signal is generated.

In step S2720 of the flowchart of FIG. 27 , the display sensing mode section may be a section for on-sensing that is performed before the power-off signal is generated.

According to the present embodiments as described above, the in-cell touch type organic light emitting display device 100 and its driving method, and the organic light emitting display panel 110 , the touch circuit 800 and the display driver 2400 . can provide

According to the present embodiments, the in-cell enabling the sensing line used in the display sensing mode to be used for signal transmission between the touch electrode and the touch circuit even in the touch sensing mode in order to sense sub-pixel characteristic values in the organic light emitting display panel. It is possible to provide a touch type organic light emitting display device 100 and a driving method thereof, and an organic light emitting display panel 110 , a touch circuit 800 and a display driver 2400 .

According to the present embodiments, as a signal line required for each of the display sensing mode and the touch sensing mode, the in-cell touch type organic light emitting display having a switch structure in which a sensing line corresponding to one type of signal line can be used in common. It is possible to provide the device 100 and a driving method thereof, and an organic light emitting display panel 110 , a touch circuit 800 , and a display driver 2400 .

According to the present embodiments, as a signal line required for each of the display mode, the display sensing mode, and the touch sensing mode, an in-cell touch type organic light emitting display device that can use a sensing line corresponding to one type of signal line in common ( 100 ) and a driving method thereof, an organic light emitting display panel 110 , a touch circuit 800 , and a display driver 2400 may be provided.

The above description and the accompanying drawings are merely illustrative of the technical spirit of the present invention, and those of ordinary skill in the art to which the present invention pertains can combine configurations within a range that does not depart from the essential characteristics of the present invention. , various modifications and variations such as separation, substitution and alteration will be possible. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: organic light emitting display device
110: organic light emitting display panel
120: data driver
130: gate driver
140: controller
800: touch circuit
2400: display driver

Claims (30)

a plurality of touch electrodes embedded in an organic light emitting display panel on which a plurality of sub-pixels are disposed;
a touch circuit for sequentially outputting touch driving signals to be sequentially applied to the plurality of touch electrodes during a touch sensing mode period; and
and two or more sensing lines for sequentially transmitting the touch driving signals sequentially output from the touch circuit to the plurality of touch electrodes during the touch sensing mode section;
The two or more sensing lines,
During the touch sensing mode period, the touch driving signal is sequentially transmitted to the plurality of touch electrodes,
An in-cell touch type organic light emitting display device that transmits a display sensing related voltage to two or more sub-pixels during a display sensing mode period. According to claim 1,
Each sub-pixel is
An organic light emitting diode, a driving transistor for driving the organic light emitting diode, a switching transistor for supplying a data voltage to a gate node of the driving transistor, and a source node or drain node of the driving transistor and a gate node of the driving transistor connected storage capacitors;
The display sensing related voltage is
An in-cell touch type organic light emitting display device that is a reference voltage applied to a source node or a drain node of the driving transistor in each of the at least two subpixels in the display sensing mode period. 3. The method of claim 2,
The two or more sensing lines,
During the display mode period, a display-related voltage is transmitted to each of the two or more sub-pixels,
The display-related voltage is
An in-cell touch type organic light emitting display device that is a reference voltage applied to a source node or a drain node of the driving transistor in each of the at least two subpixels in the display mode period. 3. The method of claim 2,
Each sub-pixel is
The in-cell touch type organic light emitting display device further comprising a sensing transistor electrically connected between a source node or a drain node of the driving transistor and a corresponding sensing line. According to claim 1,
Each region of the plurality of touch electrodes corresponds to regions of two or more sub-pixels in an in-cell touch type organic light emitting display device. According to claim 1,
Each of the sensing lines is disposed to correspond to one sub-pixel column or two or more sub-pixel columns. According to claim 1,
The in-cell touch type organic light emitting display device in which the number of sensing lines disposed to correspond to one touch electrode column is less than the number of touch electrodes constituting one touch electrode column. According to claim 1,
An in-cell touch type organic light emitting display device in which one sensing line is sequentially connected to two or more touch electrodes. 9. The method of claim 8,
The in-cell touch type organic light emitting display device further comprising a touch detection control transistor corresponding to each of the two or more touch electrodes and connecting one touch electrode and one sensing line during the touch sensing driving mode period. 10. The method of claim 9,
The touch detection control transistor,
An in-cell touch type organic light emitting display device that is turned on by a touch detection control signal applied to a gate node according to a touch sensing timing within the touch sensing mode section to connect a corresponding sensing line and a corresponding touch electrode. 11. The method of claim 10,
A source node or a drain node of the touch detection control transistor comprises:
An in-cell touch type organic light emitting display device electrically connected to a corresponding touch electrode positioned on a different layer from the touch detection control transistor through a contact hole. According to claim 1,
Further comprising a display sensing unit electrically connected to the two or more sensing lines during the display sensing mode section,
The display sensing unit,
During the display sensing mode period, a characteristic value or a characteristic value change of each of the two or more sub-pixels to which the display sensing-related voltage is transmitted through the two or more sensing lines is sensed through the two or more sensing lines,
The touch circuit is
During the touch sensing mode period, a touch sensing signal is sequentially sensed through the two or more sensing lines from the plurality of touch electrodes to which the touch driving signal is sequentially applied through the two or more sensing lines. An in-cell touch type organic light emitting display device. 13. The method of claim 12,
Further comprising a sensing type control switch electrically connecting each sensing line to the display sensing unit in the display sensing mode section and electrically connecting each sensing line to the touch circuit in the touch sensing mode section In- Cell touch type organic light emitting display device. 14. The method of claim 13,
The sensing type control switch,
During the touch sensing mode period, the respective sensing lines are synchronized with the timing at which they are sequentially connected to the plurality of touch electrodes to sequentially connect the respective sensing lines to the touch circuit;
An in-cell touch type organic light emitting display device for continuously connecting each of the sensing lines to the touch circuit during a period in which the respective sensing lines are sequentially connected to the plurality of touch electrodes during the touch sensing mode period. According to claim 1,
The plurality of touch electrodes are arranged in x columns and y rows, each of the plurality of touch electrodes corresponds to an area of subpixels arranged in m columns and y rows, and the two or more sensing lines are four subpixels. One in-cell touch type organic light emitting display device disposed one by one in each column, and wherein the two or more sensing lines are (1/4) × m × x. 16. The method of claim 15,
When the touch circuit time-divisionally drives k touch electrodes through one sensing line, k is a natural number set according to the following equation.

a plurality of touch electrodes embedded in an organic light emitting display panel on which a plurality of sub-pixels are disposed;
a touch circuit for sequentially outputting touch driving signals to be sequentially applied to the plurality of touch electrodes during a touch sensing mode period; and
and two or more signal lines for sequentially transferring the touch driving signals sequentially output from the touch circuit to the plurality of touch electrodes during the touch sensing mode section;
The two or more signal lines are
During the touch sensing mode period, the touch driving signal is sequentially transmitted to the plurality of touch electrodes,
An in-cell touch type organic light emitting display device that transmits a display-related voltage to two or more sub-pixels during a display mode period. 18. The method of claim 17,
The display-related voltage is
An in-cell touch type organic light emitting display device that is a reference voltage applied to a source node or a drain node of a driving transistor in each of the at least two subpixels in the display mode period. a plurality of touch electrodes embedded in an organic light emitting display panel on which a plurality of sub-pixels are disposed;
two or more signal lines disposed on the organic light emitting display panel;
a touch circuit for sensing a touch by sequentially driving the plurality of touch electrodes through the two or more signal lines during a touch sensing mode period; and
and a display sensing unit configured to sense a characteristic value or a characteristic value change of each sub-pixel through the two or more signal lines during a display sensing mode period. 20. The method of claim 19,
The in-cell touch type organic light emitting display device further comprising a touch detection control transistor sequentially connecting the two or more signal lines to the plurality of touch electrodes in the touch sensing mode section. 20. The method of claim 19,
Further comprising a sensing type control switch sequentially connecting the two or more signal lines to the touch circuit in the touch sensing mode section, and connecting the two or more signal lines to the display sensing unit in the display sensing mode section In- Cell touch type organic light emitting display device. In the driving method of an in-cell touch type organic light emitting display device,
sensing a characteristic value or a characteristic value change of each of two or more sub-pixels through two or more sensing lines disposed on an organic light emitting display panel during a display sensing mode period; and
During a touch sensing mode section performed before or after the display sensing mode section, sequentially driving a plurality of touch electrodes embedded in the organic light emitting display panel through the two or more sensing lines to sense a touch; A method of driving an in-cell touch type organic light emitting display device. 23. The method of claim 22,
During the display mode period, the method further comprising the step of supplying a reference voltage for driving light emission of the two or more sub-pixels to a source node or a drain node of a driving transistor in each of the two or more sub-pixels through the two or more sensing lines - A method of driving a cell touch type organic light emitting display device. a touch driving unit for sequentially outputting touch driving signals to be sequentially applied to a plurality of touch electrodes built into the organic light emitting display panel through two or more sensing lines disposed on the organic light emitting display panel during the touch sensing mode period; and
and a touch sensing unit configured to sense a touch by sequentially receiving touch sensing signals from the plurality of touch electrodes to which the touch driving signal is sequentially applied through the two or more sensing lines,
The touch driving unit and the touch sensing unit,
A touch circuit for outputting a signal and receiving a signal through the two or more sensing lines used for signal transmission even in a mode section other than the touch sensing mode. at least one display sensing unit configured to sense a characteristic value or a characteristic value change of at least one sub-pixel through at least one sensing line disposed on the organic light emitting display panel during the display sensing mode period; and
and a touch circuit for sensing a touch by touch-driving two or more touch electrodes embedded in the organic light emitting display panel through the at least one sensing line during a touch sensing mode section. 26. The method of claim 25,
A sensing type control switch for connecting the at least one sensing line to the at least one display sensing unit in the display sensing mode section, and connecting the at least one sensing line to the touch circuit in the touch sensing mode section. display driver. a display driver configured to supply a predetermined voltage to a source node or a drain node of a driving transistor in at least one subpixel through at least one sensing line disposed on the organic light emitting display panel during the display mode period or the display sensing mode period; and
and a touch circuit for supplying a touch driving signal to at least one touch electrode built in the organic light emitting display panel through the at least one sensing line during a touch sensing mode section. a plurality of data lines carrying data voltages;
a plurality of gate lines transmitting gate signals;
a plurality of touch electrodes to which a touch driving signal is sequentially applied during a touch sensing mode period; and
Two or more sensing lines for transmitting the touch driving signal to the plurality of touch electrodes during the touch sensing mode section, and transmitting a signal other than the touch driving signal during a mode section other than the touch sensing mode section An in-cell touch type organic light emitting display panel. 29. The method of claim 28,
The number of the two or more sensing lines is less than the number of the plurality of touch electrodes in an in-cell touch type organic light emitting display panel. 29. The method of claim 28,
The in-cell touch type organic light emitting display panel further comprising a touch detection control transistor corresponding to each of the two or more touch electrodes and connecting one touch electrode and one sensing line during the touch sensing driving mode period.

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