KR102430466B1 - Controller, organic light emitting display panel, organic light emitting display device, and the method for driving the organic light emitting display device - Google Patents

Abstract

The present embodiments relate to sensing and compensation technology in an organic light emitting display device, and more specifically, a sensing driving period for sensing the characteristic value of a driving transistor during image driving in real time is determined as a screen switching period to determine real-time sensing timing. The present invention relates to a controller, an organic light emitting display panel, an organic light emitting display device, and a driving method thereof, which are secured and capable of performing sensing driving in real time at the secured real time sensing timing.

Description

Controller, organic light emitting display panel, organic light emitting display device and driving method thereof

The present embodiments relate to a controller, an organic light emitting display panel, an organic light emitting display device, and a driving method thereof.

Recently, an organic light emitting display device, which has been spotlighted as a display device, 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.

In such an organic light emitting display device, sub-pixels including organic light emitting diodes are arranged in a matrix form, and the brightness of the sub-pixels selected by a scan signal is controlled according to a gray level of data.

Each sub-pixel of the organic light emitting display device may include an organic light emitting diode and a driving transistor driving the same.

Meanwhile, the driving transistor in each sub-pixel has unique characteristics such as threshold voltage and mobility. The unique characteristic value of each of the driving transistors may be changed due to deterioration according to the driving time.

For this reason, depending on the difference in driving time between the driving transistors in each subpixel, a difference in the degree of deterioration between the driving transistors may occur, and a characteristic value deviation between the driving transistors may also occur.

The deviation of the characteristic values between the driving transistors may cause a luminance deviation between the respective sub-pixels, which may be a major factor causing image quality deterioration.

Accordingly, various technologies have been developed for sensing and compensating characteristic values between driving transistors.

On the other hand, it takes a lot of time to sense the characteristic values of the driving transistors in all sub-pixels disposed in the organic light emitting display panel, in particular, the threshold voltage, and therefore it is difficult to select a sensing timing for sensing the characteristic values of the driving transistors. have.

An object of the present embodiments is to secure a real-time sensing timing for sensing the characteristic value of a driving transistor during image driving in real time, and to perform sensing driving at the secured real-time sensing timing, a controller, an organic light emitting display panel, and an organic light emitting display To provide an apparatus and a method for driving the same.

Another object of the present embodiments is to secure a real-time sensing timing by determining a section in which a screen is changed by a user input while driving an image as a sensing driving section, and a controller that enables the sensing operation to be performed in real time at the secured real-time sensing timing. , an organic light emitting display panel, an organic light emitting display device, and a driving method thereof.

Another object of the present embodiments is to secure a real-time sensing timing by determining a screen transition period in which a screen is switched to a black screen as a sensing driving period during image driving, and to perform sensing driving while driving a black frame at the secured real-time sensing timing. The present invention relates to a controller, an organic light emitting display panel, an organic light emitting display device, and a method of driving the same for real-time processing.

In one aspect, the present embodiments provide an organic light emitting display panel in which an organic light emitting diode and a driving transistor are disposed for each sub-pixel, a screen change period determiner determining a screen change period, and characteristic values of the driving transistor during the screen change period a driving control unit for controlling the sensing driving for sensing When sensing data for a pixel is generated, a compensation value may be calculated based on the sensing data for each sub-pixel to provide an organic light emitting diode display including a compensation unit.

The screen change period may be determined by a channel change signal according to a user input or a screen user interface (UI) change signal.

The screen switching section may be a sensing driving section determined according to preset real-time sensing timing information. During this sensing driving period, a predetermined number of black frames may be driven.

In another aspect, the present embodiments provide an organic light emitting display including a screen change period determiner for determining a screen change period, and a driving controller for controlling a sensing driving for sensing a characteristic value of a driving transistor to proceed during the screen change period A controller of the device may be provided.

In another aspect, the present embodiments may provide a driving method of an organic light emitting display device including an organic light emitting display panel in which an organic light emitting diode and a driving transistor are disposed for each sub-pixel. It may include a step of performing , determining a screen change period, and performing a sensing driving for sensing a characteristic value of a driving transistor during the screen change period.

In another aspect, the present embodiments provide an organic light emitting diode, a driving transistor for driving the organic light emitting diode, a sensing transistor connected between a first node of the driving transistor and a sensing line, and a second node and a data line of the driving transistor An organic light emitting display panel including a switching transistor connected therebetween, a storage capacitor connected between the first node and the second node of the driving transistor, and the like can be provided.

In such an organic light emitting display panel, a voltage of a sensing line may increase from a reference voltage according to sensing driving during a screen switching period.

According to the present embodiments as described above, a controller and an organic light emitting display that secure a real-time sensing timing for sensing the characteristic value of a driving transistor in real time during image driving, and perform sensing driving at the secured real-time sensing timing A panel, an organic light emitting display device, and a driving method thereof can be provided.

In addition, according to the present embodiments, a section in which a screen is changed by a user input during image driving is determined as a sensing driving section to secure a real-time sensing timing, and sensing driving can be performed in real time at the secured real-time sensing timing. A controller, an organic light emitting display panel, an organic light emitting display device, and a driving method thereof can be provided.

In addition, according to the present embodiments, real-time sensing timing is secured by determining a screen switching section in which a screen is switched to a black screen as a sensing driving section during image driving, and sensing driving is performed while driving a black frame at the secured real-time sensing timing. It is possible to provide a controller, an organic light emitting display panel, an organic light emitting display device, and a driving method therefor that enable real-time processing.

1 is a system configuration diagram of an organic light emitting display device according to the present exemplary embodiment.
2 is an exemplary diagram of a sub-pixel structure of an organic light emitting diode display according to example embodiments.
3 is an exemplary diagram of another sub-pixel structure and a compensation circuit of the organic light emitting diode display according to the present exemplary embodiment.
4 is a view for explaining a threshold voltage sensing method of the organic light emitting diode display according to the present exemplary embodiment.
5 is a view for explaining a mobility sensing method of an organic light emitting display device according to the present exemplary embodiment.
6 is a diagram illustrating a sensing timing of the organic light emitting diode display according to the present exemplary embodiments.
7 is a diagram illustrating a method for securing a real-time sensing timing of an organic light emitting display device and a sensing system therefor according to the present embodiments.
8 to 10 are diagrams for explaining a method for securing a real-time sensing timing based on user triggering according to the present embodiments.
11 to 15 are diagrams for explaining a method for securing a real-time sensing timing based on system triggering according to the present embodiments.
16 is a diagram illustrating a controller for securing real-time sensing timing according to the present embodiments.
17 is a flowchart illustrating a method of driving an organic light emitting display device for securing real-time sensing timing according to the present embodiments.
18 is a flowchart illustrating a method of driving an organic light emitting display device for securing real-time sensing timing based on user triggering according to the present embodiments.
19 is a flowchart illustrating a method of driving an organic light emitting display device for securing real-time sensing timing based on system triggering according to the present embodiments.

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, when 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 system configuration diagram of an organic light emitting diode display 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 DL1 to DLm and a plurality of gate lines GL1 to GLn are disposed, and a plurality of subpixels SP : an organic light emitting display panel 110 on which sub pixels are disposed, a data driver 120 driving a plurality of data lines DL1 to DLm, and a gate driver driving a plurality of gate lines GL1 to GLn ( 130 , and a controller 140 for controlling the data driver 120 and the gate driver 130 .

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. , 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 DL1 to DLm by supplying data voltages to the plurality of data lines DL1 to DLm. Here, the data driver 120 is also referred to as a 'source driver'.

The gate driver 130 sequentially drives the plurality of gate lines GL1 to GLn by sequentially supplying scan signals to the plurality of gate lines GL1 to GLn. 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 GL1 to GLn 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 DL1 to DLm. .

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 side).

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 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, a vertical synchronization signal (Vsync), a horizontal synchronization signal (Hsync), an input data enable (DE: Data Enable) signal, various types including a clock signal (CLK), etc. Receive timing signals 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 may include 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 the 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 drive a plurality of data lines including at least one source driver integrated circuit (SDIC).

Each source driver integrated circuit SDIC is connected to a bonding pad of the organic light emitting display panel 110 by a tape automated bonding (TAB) method or a chip on glass (COG) method. It may be connected to or directly disposed on the organic light emitting display panel 110 , or may be integrated and disposed on the organic light emitting display panel 110 in some cases. In addition, each source driver integrated circuit SDIC may be implemented in a Chip On Film (COF) method mounted on a film connected to the organic light emitting display panel 110 .

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

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

The gate driver 130 may include at least one gate driver integrated circuit (GDIC).

Each gate driver integrated circuit (GDIC) is connected to a bonding pad of the organic light emitting display panel 110 by a tape automated bonding (TAB) method or a chip-on-glass (COG) method, or a gate in panel (GIP) method. ) type and may be disposed directly on the organic light emitting display panel 110 , or may be integrated and disposed on the organic light emitting display panel 110 in some cases. In addition, each gate driver integrated circuit (GDIC) may be implemented in a chip-on-film (COF) method mounted on a film connected to the organic light emitting display panel 110 .

Each gate driver integrated circuit GDIC may include a shift register, a level shifter, and the like.

The organic light emitting display device 100 according to the present exemplary embodiment includes at least one source printed circuit board (S-PCB) necessary for circuit connection to at least one source driver integrated circuit (SDIC); It may include a control printed circuit board (C-PCB) for mounting control components and various electric devices.

At least one source driver integrated circuit (SDIC) may be mounted on the at least one source printed circuit board (S-PCB), or a film on which at least one source driver integrated circuit (SDIC) is mounted may be connected.

The control printed circuit board (C-PCB) includes a controller 140 for controlling operations of the data driver 120 and the gate driver 130 , the organic light emitting display panel 110 , the data driver 120 , and the gate driver. A power controller for supplying various voltages or currents to 130 or the like or controlling various voltages or currents to be supplied may be mounted.

The at least one source printed circuit board (S-PCB) and the control printed circuit board (C-PCB) may be circuitly connected through at least one connecting member.

Here, the connection member may be a flexible printed circuit (FPC), a flexible flat cable (FFC), or the like.

At least one source printed circuit board (S-PCB) and control printed circuit board (C-PCB) may be implemented by being integrated into one printed circuit board.

Each sub-pixel SP disposed in the organic light emitting display panel 110 according to the present exemplary embodiments includes an organic light emitting diode (OLED) and circuit elements such as a driving transistor for driving the organic light emitting diode (OLED). is composed of

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.

2 is an exemplary diagram of a sub-pixel structure of the organic light emitting diode display 100 according to the present exemplary embodiments.

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

The organic light emitting diode (OLED) may include a first electrode (eg, an anode electrode), an organic layer, and a second electrode (eg, a cathode 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 as a gate node through the gate line. .

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.

This storage capacitor Cstg is not a parasitic capacitor (eg, Cgs, Cgd) which 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).

Meanwhile, in the case of the organic light emitting diode display 100 according to the present exemplary embodiments, as the driving time of each sub-pixel SP increases, the circuit elements such as the organic light emitting diode (OLED) and the driving transistor (DRT) are reduced. 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 may be used as 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 variation in the characteristic values between the circuit elements causes a variation in luminance between 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 luminance of sub-pixels and deviation of luminance between sub-pixels may cause problems such as lowering the accuracy of the luminance expressive power of sub-pixels or generating screen abnormalities.

Here, the characteristic value of the circuit element (hereinafter also referred to as “sub-pixel characteristic value”) 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 exemplary 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 included.

3 is an exemplary diagram of another sub-pixel structure and a compensation circuit of the organic light emitting diode display 100 according to the present exemplary embodiments.

Referring to FIG. 3 , each sub-pixel 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. 3 , 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.

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 , the organic light emitting diode display 100 according to the present exemplary embodiment senses a change in sub-pixel characteristic values (characteristics of a driving transistor and characteristics of an organic light emitting diode) and/or a deviation between sub-pixel characteristics to obtain sensing data. A sensing unit 310 that outputs (330) 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 330 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, a first switch SW1 and a second switch SW2 may be further included.

Whether the reference voltage Vref is supplied to the sensing line SL may be controlled through the first switch SW1 .

When the first switch SW1 is turned on, the reference voltage Vref is supplied to the sensing line SL and the first node N1 of the driving transistor DRT is supplied through the turned-on sensing transistor SENT. may be authorized as

On the other hand, when the voltage of the first node N1 of the driving transistor DRT becomes a voltage state reflecting 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.

When the voltage of the first node N1 of the driving transistor DRT reaches a voltage state reflecting the sub-pixel characteristic value, the second switch SW2 is turned on, and the sensing unit 310 and the sensing line SL are connected to each other. can be connected

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.

For example, one sensing line SL may be disposed in each subpixel column, or may be disposed one in every two or more subpixel columns.

For example, when one pixel is composed of 4 sub-pixels (red sub-pixel, white sub-pixel, green sub-pixel, and blue sub-pixel), the sensing line SL has 4 sub-pixel columns (red sub-pixel column, One pixel column including a white subpixel column, a green subpixel column, and a blue subpixel column) may be arranged one by one.

When the sensing unit 310 is connected to the sensing line SL, the voltage of the first node N1 of the driving transistor DRT (the voltage of the sensing line SL, or the line capacitor on the sensing line SL) is charged. voltage) is sensed.

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 deviation ΔVth of the driving transistor DRT, or the driving transistor DRT. It may be a voltage value for sensing the mobility of

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

4 is a view for explaining a threshold voltage sensing method of the organic light emitting diode display according to the present exemplary embodiment.

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 is floated according to the OFF of the first switch SW1 .

Accordingly, the voltage of the first node N1 of the driving transistor DRT increases.

The voltage of the first node N1 of the driving transistor DRT rises for a predetermined time, and then becomes saturated after a predetermined time.

The saturated voltage of the first node N1 of the driving transistor DRT may correspond to the difference between the data voltage Vdata and the threshold voltage Vth or the difference between the data voltage Vdata and the threshold voltage deviation 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 Vsen sensed by the sensing unit 310 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).

5 is a view for explaining a mobility sensing method of an organic light emitting display device according to the present exemplary embodiment.

Referring to FIG. 5 , during mobility sensing driving, each of the first node N1 and the second node N2 of the driving transistor DRT is a reference voltage Vref and a data voltage Vdata for mobility sensing driving. is initialized

Thereafter, the first node N1 of the driving transistor DRT floats in response to the first switch SW1 being turned off.

Accordingly, the voltage of the first node N1 of the driving transistor DRT may increase.

The voltage rising rate (the amount of change in the voltage rising value with respect to time ΔV) of the first node N1 of the driving transistor DRT indicates the current capability, ie, mobility, of the driving transistor DRT.

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 may sense the increased voltage of the first node N1 of the driving transistor DRT by sensing the voltage of the sensing line SL after the voltage rises for a predetermined period of time.

According to the above-described threshold voltage sensing driving or mobility sensing driving, the sensing unit 310 converts the sensed voltage Vsen for threshold voltage sensing or mobility sensing into a digital value, and converts the sensed value converted into a digital value. It generates and outputs the sensing data included.

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

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

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 may be grasped. When the characteristic value change 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 characteristic value change of the driving transistor DRT (ie, 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 unit 320, or uses the calculated compensation value as the image data (Data ) may be included.

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 unit 320, or uses the calculated compensation value as the corresponding image data (Data ) may be included.

The compensator 330 may change the image data through a threshold voltage compensation process or a mobility compensation process 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 data supplied from the compensator 330 into a data voltage through the digital-to-analog converter 340 and supplies it to the corresponding sub-pixel, thereby compensating the sub-pixel characteristic (threshold). voltage compensation and mobility compensation) are actually performed.

As such sub-pixel characteristic value compensation is performed, image quality may be improved by reducing or preventing a luminance deviation between sub-pixels.

6 is a diagram illustrating a sensing timing of the organic light emitting display device 100 according to the present exemplary embodiments.

Referring to FIG. 6 , in the organic light emitting diode display 100 according to the present exemplary embodiments, the threshold voltage sensing (Vth Sensing) of the driving transistor DRT is the voltage of the first node N1 of the driving transistor DRT. Since the saturation time is required, it takes a relatively long time compared to the mobility sensing of the driving transistor DRT.

In consideration of this, for example, as shown in FIG. 6 , the threshold voltage sensing of the driving transistor DRT may be performed while the image is not driven after a power-off signal is generated according to a user input or the like.

Mobility sensing of the driving transistor DRT may be performed even after the power-off signal is generated, but may also be performed during image driving in consideration of the short time required.

Accordingly, as shown in FIG. 6 , the mobility sensing of the driving transistor DRT may be performed after the power-on signal is generated.

Also, as shown in FIG. 6 , the movement of the driving transistor DRT may be sensed for each blank time between active times based on the vertical synchronization signal Vsync.

For example, during one blank time, the mobility sensing of the driving transistors DRT in one sub-pixel may be performed, and in some cases, the mobility of the driving transistors DRT in two or more sub-pixels may be sensed. This may proceed.

Meanwhile, after the power-off signal is generated, the screen is displayed in a black state while the sensing driving for sensing characteristic values of all sub-pixels disposed on the organic light emitting display panel 110 is performed.

Accordingly, the user cannot recognize that the sensing operation is in progress.

Accordingly, after the user presses the power-off button and a power-off signal is generated, the AC power in the organic light emitting display device 100 is turned off due to an act of the user unplugging the power plug from the outlet or a problem in the power supply inside the device. In this case, the sensing driving in progress according to the power-off signal may be stopped.

In this case, sensing data for all sub-pixels may not be collected, or an error may occur in sensing data due to an electric shock.

For this reason, the compensation value may not be properly calculated, which may cause screen abnormalities such as a block dim phenomenon and a screen irregularity phenomenon.

On the other hand, even if the AC power in the organic light emitting display device 100 is not turned off after the user presses the power-off button and the power-off signal is generated, since the sensing operation proceeds for a long time, the sensing operation is completely completed even if the user wants to see the screen. It is also inconvenient to have to wait for a long time until it is finished.

Accordingly, the present embodiments disclose a method and a sensing system for securing a real-time sensing timing capable of performing sensing driving before a power-off signal is generated without performing sensing driving after a power-off signal is generated.

6 in that the sensing driving performed in real time in the real-time sensing timing section (ie, the section before the power-off signal is generated) secured according to the method for securing the real-time sensing timing according to the present embodiments is performed in the screen switching section. There is a difference from the sensing operation performed in the blank section in .

The sensing driving performed in real time in the real-time sensing timing section secured according to the method for securing the real-time sensing timing according to the present embodiments may be, for example, a threshold voltage sensing driving, and in some cases, a mobility sensing driving. have.

7 is a diagram illustrating a method for securing a real-time sensing timing of the organic light emitting display device 100 and a sensing system therefor according to the present exemplary embodiments.

Referring to FIG. 7 , the organic light emitting display device 100 according to the present exemplary embodiments includes a sensing system to provide a method for securing a real-time sensing timing.

Such a sensing system includes a screen change period determiner 710 that determines the screen change period CT, and a driving control that controls the sensing driving for sensing the characteristic value of the driving transistor DRT during the screen change period CT to proceed. A sensing line electrically connected to the control unit 720 and each sub-pixel SP in which the organic light emitting diode (OLED) and the driving transistor (DRT) are disposed in the organic light emitting display panel 110 during the screen change period CT When the sensing unit 310 senses the voltage of SL) and generates sensing data based on the sensed voltage Vsen, and the sensing unit 310 generates sensing data for all subpixels SP, each sub A compensation unit 330 and the like are included by calculating a compensation value based on sensing data for each pixel SP.

Here, the screen change period CT exists before the power-off signal is generated, and exists between each image driving period.

Also, the screen transition period CT may not be a blank time period.

The driving control unit 720 includes the data driver 120 and the gate driver ( 130), etc. can be controlled.

If the above-described sensing system is used, there is an advantage in that sensing data can be obtained in real time during image driving by performing sensing driving for each screen change section CT before a power-off signal is generated.

The characteristic value of the driving transistor DRT sensed by the sensing driving performed for each screen change period CT may be, for example, a threshold voltage Vth of the driving transistor DRT in at least one sub-pixel.

As described above, the sensing driving is performed for each screen change period CT, and before the power-off signal is generated, threshold voltages for the driving transistors DRT of all sub-pixels disposed in the organic light emitting display panel 110 are generated. can be sensed.

According to the method for securing the real-time sensing timing according to the embodiments briefly described above, each sub-pixel SP in which sensing driving is performed for each screen change period CT, as shown in FIG. 3 , is an organic light emitting diode. (OLED), a driving transistor (DRT) for driving the organic light emitting diode (OLED), and a sensing transistor (SENT) connected between the first node (N1) of the driving transistor (DRT) and the sensing line (SL), and driving; The switching transistor SWT is connected between the second node N2 of the transistor DRT and the data line DL, and the storage connected between the first node N1 and the second node N2 of the driving transistor DRT. It may include a capacitor (Cstg) and the like.

Here, according to the sensing driving (threshold voltage sensing driving or mobility sensing driving), the voltage of the sensing line SL is increased from the reference voltage Vref corresponding to the initialization voltage during the screen change period CT.

As described above, it is possible to provide the organic light emitting display panel 110 in which sensing driving can be performed in real time for each screen switching section CT.

Meanwhile, the screen transition period determiner 710 may determine the screen transition period CT in two ways.

A first method for determining the screen transition period CT is a user triggering method.

According to this user triggering method, when a channel change signal, a screen UI (User Interface) change signal, etc. are generated according to a user input, the screen change section determiner 710 detects it and detects the channel change completion time or The time until the screen UI change is completed may be determined as the screen transition period (CT).

The screen transition section CT refers to a section in which the screen before the channel change or the screen UI change is switched to the screen during the channel change or the screen UI change.

That is, the screen state during the screen change section CT is different from the screen state before the screen change, and is a screen state that the user can visually check.

For example, the screen state during the screen transition period CT may be a black screen state or a screen state in which a black screen is overall and simple information, symbols, images, etc. are displayed in some areas.

A second method for determining the screen transition period CT is a system triggering method.

According to this system triggering method, the screen switching section determining unit 710 sets the sensing driving section ST determined according to Real-Time Sensing (RS) timing information, regardless of user input, to the screen switching section ( CT) is determined.

That is, the image driving section DT and the sensing driving section ST are repeatedly time-divided within the real-time sensing timing section predetermined inside the sensing system, and the time-divided sensing driving section ST is determined as the screen switching section CT. do.

The screen state during the screen transition period CT may be a black screen state.

In addition, the screen transition period CT may have a temporal length of one frame or more. That is, during the screen transition period CT, one or more black frames may be driven.

In the black screen or black frame described in the present specification, black may mean a complete black color of 0 (zero) grayscale, but may also be a low grayscale color that appears black or dark gray when viewed with the naked eye.

Hereinafter, a method for securing a real-time sensing timing for each of the two screen switching section determination methods briefly described above will be described in more detail below.

8 to 10 are diagrams for explaining a method for securing a real-time sensing timing based on user triggering according to the present embodiments.

Referring to FIG. 8 , according to the method for securing real-time sensing timing based on user triggering according to the present embodiments, the screen change period CT determined by the screen change period determiner 710 is a channel change generated according to a user input. It is a section determined by a signal or a screen UI change signal.

The screen change section CT determined in this way is regarded as the sensing driving section ST, and sensing driving may be performed under the control of the driving controller 720 .

A section other than the screen switching section CT is an image driving section DT, and image driving is performed.

As described above, when a user input for channel change, screen UI change, etc. occurs and the screen is switched to a screen that the user does not actually see or are not interested in, such as a black screen, the screen transition period (CT) By performing the sensing operation while the power is on, the sensing operation may be performed while the power is turned on without affecting the user's screen viewing at all.

Referring to FIG. 10 , the screen switching section determiner 710 determines whether to switch the screen based on the user input signal ( S1010 ).

As a result of the determination, if it is not determined that the screen will be changed, the driving control unit 720 drives the image (S1020).

As a result of the determination, if it is determined that a screen change is made, the driving control unit 720 performs sensing driving during the screen change period CT (S1030).

On the other hand, since the temporal length of the screen change period CT is too short to perform all the sensing driving for all sub-pixels, sensing driving must be performed every several screen change periods CT to be disposed on the organic light emitting display panel 110 . It is possible to complete the sensing of all sub-pixels.

When sensing data obtained through sensing driving performed for each screen change section CT is collected, and the collection result includes sensing data for all sub-pixels, a compensation value calculation process for each sub-pixel may be performed.

In this regard, according to the method for securing real-time sensing timing based on user triggering according to the present embodiments, the memory unit 320 temporarily stores sensing data obtained through sensing operation performed for each screen change period CT. The temporary memory 910 may be divided into a main memory 920 in which sensing data for all sub-pixels stored in the temporary memory 910 are moved or copied and stored at once.

In other words, referring to FIGS. 9 and 10 , the temporary memory 910 temporarily stores the sensed data output from the sensing unit 310 as sensing driving is performed for each image driving period CT ( S1040 ).

In order to move or copy the sensing data from the temporary memory 910 to the main memory 920 , the memory management unit 900 for checking whether the sensing data for all sub-pixels is stored in the temporary memory 910 may be required.

That is, the memory manager 900 determines whether sensing data for all sub-pixels SP is stored in the temporary memory 910 ( S1050 ).

As a result of the determination, if it is determined that the sensing data for all sub-pixels SP are stored in the temporary memory 910 , the memory management unit 900 stores the sensing data for the mode sub-pixels SP stored in the temporary memory 910 . It is stored in the main memory 920 (S1060).

When the movement or copying of the sensing data from the temporary memory 910 to the main memory 920 is completed by the memory management unit 900 , the compensator 330 performs all subpixels ( Compensation values for all sub-pixels SP may be calculated based on the sensing data for SP ( S1070 ).

When the above-described memory management method is used, it is possible to effectively compensate the characteristic values of the driving transistors of all sub-pixels disposed in the organic light emitting display panel 110 through sensing driving performed for each screen change period CT.

Meanwhile, steps S1050 and S1060 may be performed after the power-off signal is generated.

In this case, after the power-on signal is generated and the organic light emitting display device 100 is turned on, the compensation unit 330 may apply compensation by driving the image using the compensation value calculated in step S1070 .

In the above, a user triggering-based real-time sensing timing securing method and real-time sensing driving using the same have been described. Hereinafter, a system triggering-based real-time sensing timing securing method and real-time sensing driving using the same will be described.

11 to 15 are diagrams for explaining a method for securing a real-time sensing timing based on system triggering according to the present embodiments.

11 and 12 , according to the method for securing a real-time sensing timing based on system triggering according to the present embodiments, the screen change period CT determined by the screen change period determiner 710 is a preset real-time sensing method. It may be a sensing driving period ST determined according to timing information.

A real-time sensing timing section is defined by preset real-time sensing timing information.

In the real-time sensing timing section, one or more image driving sections DT and one or more screen switching sections CT are alternately formed.

In addition, each screen switching section CT corresponds to the sensing driving section ST.

Meanwhile, the screen transition period CT corresponding to the sensing driving period ST has a temporal length of one or more frames.

12 and 13 , the screen transition period CT corresponding to the sensing driving period ST may have a temporal length of 3 frames.

Accordingly, in the real-time sensing timing section, the image driving section DT of one frame length and the sensing driving section ST of the three frame length are repeatedly performed.

In addition, three frames in the screen change period CT corresponding to the sensing driving period ST may correspond to black frames.

According to this, normal image driving is performed for 1 frame length, and sensing driving is performed while a black screen is displayed for 3 frame lengths.

Accordingly, the driving control unit 720 controls so that a predetermined number (three in the case of the example of FIG. 13 ) of black frames are driven during the screen change period CT corresponding to the sensing driving period ST, The sensing operation for sensing the characteristic value of the transistor DRT may be controlled to proceed.

As described above, regardless of user input, by determining the screen transition period CT defined as the sensing driving period ST according to real-time sensing timing information set inside the sensing system, the sensing operation is performed in real time during image driving. can

As described above, during the screen transition period CT corresponding to the sensing driving period ST, a predetermined number of black frames (three in the case of the example of FIG. 13 ) are driven, so that a certain number of black frames are driven between normal image screens. A black screen of (three in the case of the example of FIG. 13 ) frames is displayed.

Referring to FIG. 13 , a black screen of 3 frames displayed between normal video screens should not be recognized by the user.

Accordingly, during the screen change period CT corresponding to the sensing driving period ST, the number of continuously driven black frames may be determined according to a driving frequency at which the user cannot perceive the black screen.

Here, the driving frequency at which a black screen cannot be recognized corresponds to a driving frequency for driving an image in the real-time sensing timing period (this is referred to as an “RS driving frequency”, Fs), and may be a preset value.

In addition, the basic driving frequency Fn in a general section other than the real-time sensing timing section, that is, in a section in which sensing driving is not performed, may be an integer (n) times the RS driving frequency Fs.

Accordingly, the RS driving frequency Fs is a value obtained by dividing the basic driving frequency Fn by the integer n.

n is a value obtained by dividing the basic driving frequency (Fn) by the RS driving frequency (Fs), and corresponds to an image frame period. That is, one frame is image driven for every n frames.

Accordingly, n-1 corresponds to the number of continuously driven black frames during the screen change period CT corresponding to the sensing driving period ST.

For example, when the basic driving frequency Fn is 120 Hz and the RS driving frequency Fs is preset to 30 Hz, the integer n corresponding to the image frame period becomes 120 Hz / 30 Hz = 4, and the sensing driving period During the screen change period CT corresponding to ST, the number n-1 of the black frames continuously driven is 3.

Accordingly, one image frame is driven for every 4 frames, and sensing driving is performed while 3 black frames are driven.

That is, one image frame (FR #1) is image driven, and sensing driving is performed while three black frames (FR #2, FR #3, FR #4) are driven. Again, one image frame FR #5 is image driven, and then the sensing driving is performed while three black frames FR #6, FR #7, FR #8 are driven.

As described above, during the screen transition period CT corresponding to the sensing driving period ST, the number of black frames is reduced in a range in which the user cannot perceive the black screen despite the sensing driving while displaying the black screen. Because it is adjusted, real-time sensing can be performed without user inconvenience.

Referring to FIG. 14 , sensing driving is performed for each image driving section CT, and the sensing unit 310 generates sensing data for a corresponding subpixel and stores the generated data in the memory unit 320 .

In this way, when sensing data for all sub-pixels disposed on the organic light emitting display panel 110 is stored in the memory unit 320 , the compensator 330 , at an appropriate time, stores all the sub-pixels stored in the memory unit 320 . Compensation values for all sub-pixels SP may be calculated based on the sensing data for the pixels SP.

The method for securing the real-time sensing timing based on the system triggering described above and the real-time sensing method using the same will be briefly described with reference to FIG. 15 .

Referring to FIG. 15 , when a real-time sensing timing section according to real-time sensing timing information starts, real-time sensing starts ( S1510 ).

Accordingly, the RS driving frequency Fs is determined according to the real-time sensing timing information (S1520).

At this time, the length (ie, the number of frames) of each of the screen transition period CT corresponding to the image driving period DT and the sensing driving period ST is determined. That is, the number of black frames (n-1) in the screen transition period CT corresponding to the sensing driving period ST is determined.

When the RS driving frequency Fs is determined, the image frame and the black frame are alternately driven according to the RS driving frequency Fs, and sensing driving is performed in the black frame driving section (S1530).

When sensing data for all sub-pixels is obtained through step S1530, real-time sensing is terminated (S1540), and the image frame is driven according to the basic driving frequency Fn (S1550).

16 is a diagram illustrating the controller 140 for securing real-time sensing timing according to the present embodiments.

Referring to FIG. 16 , the controller 140 for securing real-time sensing timing according to the present embodiments includes a screen transition period determiner 710 that determines a screen transition period CT, and a screen transition period CT during the screen transition period CT. , and a driving controller 720 for controlling the sensing driving for sensing the characteristic value of the driving transistor DRT to proceed.

When the above-described controller 140 is used, the sensing driving is performed at each screen change section CT before the power-off signal is generated, so that the sensing driving can be performed in real time during the image driving.

The screen change period determiner 710 may determine the screen change period CT according to a channel change signal according to a user input or a screen user interface (UI) change signal.

As described above, when a user input for channel change, screen UI change, etc. occurs and the screen is switched to a screen that the user does not actually see or are not interested in, such as a black screen, the screen transition period (CT) By performing the sensing operation while the power is on, the sensing operation may be performed while the power is turned on without affecting the user's screen viewing at all.

Meanwhile, the screen change section determiner 710 may determine the sensing driving section ST determined according to preset real-time sensing timing information as the screen change section CT.

Accordingly, the driving controller 720 may control the sensing driving to proceed while continuously driving a predetermined number of black frames during the screen change period CT.

As described above, regardless of user input, the screen transition section CT defined as the sensing driving section ST is determined according to the real-time sensing timing information set inside the sensing system, and the sensing drive can be performed in real time during image driving. have.

In addition, during the screen transition period CT corresponding to the sensing driving period ST, the number of black frames is adjusted in a range in which the user cannot perceive the black screen in spite of the sensing operation being performed while displaying the black screen. When driving is performed, real-time sensing can be performed without the user's recognition of the black screen.

17 to 19 are flowcharts of a driving method of the organic light emitting display device 100 for securing real-time sensing timing according to the present embodiments.

Referring to FIG. 17 , the driving method of the organic light emitting display device 100 for securing the real-time sensing timing according to the present embodiments includes the steps of driving an image ( S1710 ) and determining the screen transition period (CT). It may include a step S1720 and a step S1730 of performing a sensing driving for sensing a characteristic value of the driving transistor DRT during the screen change period CT ( S1730 ).

According to the above-described driving method, sensing driving may be performed in real time during image driving by performing sensing driving for each screen change period CT before the power-off signal is generated.

As shown in FIG. 18 , when real-time sensing timing is secured based on user triggering, in step S1720 of determining the screen transition period (CT), a channel change signal or screen UI (User input) generated according to a user input Interface) may determine the screen transition period CT according to the change signal.

According to this, when a user input for channel change, screen UI change, etc. occurs and the screen is changed to a screen that the user does not actually see or is not interested in, such as a black screen, sensing is performed during the screen transition period CT. By proceeding with the driving, the sensing driving can be performed while the power is turned on without affecting the user's screen viewing at all.

As shown in FIG. 19 , when real-time sensing timing is secured based on system triggering, in step S1720 of determining the screen transition period (CT), a sensing driving period determined according to preset real-time sensing timing information ( ST) may be determined as the screen transition period CT.

In addition, while sensing driving is in progress, a predetermined number of black frames are continuously driven and displayed in a range in which the user does not recognize the black screen.

According to this, the screen switching section CT defined as the sensing driving section ST can be determined according to the real-time sensing timing information set in the sensing system, and the sensing driving can be performed in real time while the image is being driven.

In addition, during the screen transition period CT corresponding to the sensing driving period ST, the number of black frames is adjusted in a range in which the user cannot perceive the black screen in spite of the sensing operation being performed while displaying the black screen. When driving is performed, real-time sensing can be performed without the user's recognition of the black screen.

According to the present embodiments as described above, a controller 140 that secures a real-time sensing timing for sensing the characteristic value of the driving transistor in real time during image driving, and enables sensing driving at the secured real-time sensing timing; It is possible to provide an organic light emitting display panel 110 , an organic light emitting display device 100 , and a driving method thereof.

In addition, according to the present embodiments, a section in which a screen is changed by a user input during image driving is determined as a sensing driving section to secure a real-time sensing timing, and sensing driving can be performed in real time at the secured real-time sensing timing. The controller 140 , the organic light emitting display panel 110 , the organic light emitting display device 100 , and a driving method thereof may be provided.

In addition, according to the present embodiments, real-time sensing timing is secured by determining a screen switching section in which a screen is switched to a black screen as a sensing driving section during image driving, and sensing driving is performed while driving a black frame at the secured real-time sensing timing. It is possible to provide the controller 140, the organic light emitting display panel 110, the organic light emitting display device 100, and a driving method thereof that enable the process to be performed in real time.

The above description and the accompanying drawings are merely illustrative of the technical idea 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. Therefore, 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 equivalent range 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

Claims (16)

an organic light emitting display panel in which an organic light emitting diode and a driving transistor are disposed for each sub-pixel;
a screen change section determining unit for determining a screen change section;
a driving control unit for controlling a sensing driving for sensing a characteristic value of the driving transistor to proceed during the screen change period;
a sensing unit sensing a voltage of a sensing line electrically connected to each sub-pixel during the screen change period and generating sensing data based on the sensed voltage; and
a compensator for calculating a compensation value based on the sensing data for each sub-pixel when sensing data for all sub-pixels is generated;
The sensing line is an organic light emitting display device in which a voltage is increased from a reference voltage during the screen switching period. According to claim 1,
The screen transition section is
An organic light emitting display device determined by a channel change signal or a screen UI (User Interface) change signal according to a user input. 3. The method of claim 2,
a temporary memory configured to store the sensing data output from the sensing unit; and
It is determined whether the sensing data for all sub-pixels are stored in the temporary memory, and when it is determined that the sensing data for all sub-pixels is stored in the temporary memory, the sensing data for all sub-pixels stored in the temporary memory are stored in the main memory. Further comprising a memory management unit to store in,
The compensation unit,
An organic light emitting display device for calculating compensation values for all sub-pixels based on sensing data for all sub-pixels stored in the main memory. According to claim 1,
The screen transition section is
An organic light emitting display device that is a sensing driving section determined according to preset real-time sensing timing information. 5. The method of claim 4,
The drive control unit,
During the screen transition period,
Controls the number of black frames to be driven,
An organic light emitting diode display for controlling a sensing driving for sensing the characteristic value of the driving transistor. 6. The method of claim 5,
During the screen transition period, the number of continuously driven black frames is
An organic light emitting display device determined according to a driving frequency at which a user does not perceive a black screen. According to claim 1,
The characteristic value of the driving transistor is a threshold voltage. In the controller of the organic light emitting display device,
The organic light emitting display device,
an organic light emitting display panel in which a plurality of sub-pixels including an organic light emitting diode and a driving transistor are disposed, and a sensing line electrically connected to the plurality of sub-pixels is disposed,
The controller of the organic light emitting display device,
a screen change section determining unit for determining a screen change section; and
a driving control unit for controlling the sensing driving for sensing the characteristic value of the driving transistor to proceed during the screen change period;
A controller of the organic light emitting display device for controlling the voltage level of the sensing line to rise from a reference voltage during the screen switching period. 9. The method of claim 8,
The screen switching section determining unit,
A controller of an organic light emitting display device that determines the screen switching period by a channel change signal or a screen UI (User Interface) change signal according to a user input. 9. The method of claim 8,
The screen switching section determining unit,
A controller of an organic light emitting display device that determines a sensing driving section determined according to preset real-time sensing timing information as the screen switching section. 11. The method of claim 10,
The drive control unit,
During the screen transition period,
A controller of an organic light emitting display device that controls the sensing driving to proceed while a predetermined number of black frames are continuously driven. In the driving method of an organic light emitting display device comprising: an organic light emitting diode and a driving transistor for each sub-pixel, and an organic light emitting display panel on which a sensing line electrically connected to each of the sub-pixels is disposed, the method comprising:
performing image driving;
determining a screen transition period; and
and performing a sensing driving for sensing the characteristic value of the driving transistor during the screen change period,
In the sensing driving step, a voltage level of the sensing line increases from a reference voltage during the screen switching period. 13. The method of claim 12,
In the step of determining the screen transition period,
A method of driving an organic light emitting display device for determining the screen switching period according to a channel change signal or a screen UI (User Interface) change signal generated according to a user input. 13. The method of claim 12,
In the step of determining the screen transition period,
A method of driving an organic light emitting display device for determining a sensing driving section determined according to preset real-time sensing timing information as the screen switching section. 15. The method of claim 14,
A driving method of an organic light emitting display device in which a predetermined number of black frames are continuously driven and displayed while the sensing driving is performed. organic light emitting diodes;
a driving transistor for driving the organic light emitting diode;
a sensing transistor connected between the first node of the driving transistor and a sensing line;
a switching transistor connected between the second node of the driving transistor and a data line; and
a storage capacitor connected between the first node and the second node of the driving transistor;
The sensing line is an organic light emitting display panel in which a voltage rises from a reference voltage during a screen switching period.

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