KR20180002092A - Organic light emitting display panel, organic light emitting display device, and the method for driving the organic light emitting display device - Google Patents

Abstract

Embodiments of the present invention relate to an organic light emitting display panel, an organic light emitting display device and a driving method thereof. More specifically, the present invention relates to an organic light emitting display panel, an organic light emitting display device and a driving method thereof, which can display a fake image regardless of an actual image on between each image frame defined by a frame frequency. Embodiments of the present invention seem to be driven at a high speed with a high speed frame frequency even while driving at a low speed with a low speed frame frequency and can improve a video response time and image quality. The organic light emitting display device comprises the organic light emitting display panel which arranges multiple sub pixels defined by multiple data lines and multiple gate lines. Each of the sub pixels includes: an organic light emitting diode; a driving transistor driving the organic light emitting diode; a first transistor delivering data voltage to a first node of the driving transistor; and a storage capacitor electrically connected between the first node and a second node of the driving transistor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting display panel, an organic light emitting display device, and a method of driving the same. BACKGROUND ART [0002]

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

2. Description of the Related Art In recent years, an organic light emitting diode (OLED) display device that has been popular as a display device has advantages of high response speed, high luminous efficiency, high brightness, and wide viewing angle by using an organic light emitting diode (OLED)

Such an organic light emitting display device arranges subpixels including organic light emitting diodes in a matrix form and controls the brightness of subpixels selected by the scan signals according to the gradation of data.

On the other hand, there is a growing demand for high-speed driving for a higher response speed.

However, in order to perform high-speed driving, data input is required to be high speed, which not only requires high performance of the data driver, but also has a limitation in applying high-speed driving because of a large load on the data line at a large area and a high resolution .

The purpose of these embodiments is to provide a fake high-speed drive which makes it appear to drive at a high speed while driving at a low speed.

Another object of the present embodiments is to provide a high-speed fake driving which can improve the video response time and picture quality without raising the frame frequency.

It is another object of the present embodiments to provide a sub-pixel structure that makes it look like high-speed driving without raising the frame frequency.

It is still another object of the present embodiments to provide a high-speed fake driving considering light-emitting efficiency for each color.

It is another object of the present embodiments to independently provide high-speed pake driving for each color or each color group.

Another object of the present embodiments is to prevent image quality deterioration due to high-speed fake driving.

The present embodiments can provide an organic light emitting display panel, an organic light emitting display, and a driving method thereof that make it appear to be driven at a high speed while driving at a low speed.

The present embodiments can provide an organic light emitting display panel, an organic light emitting display, and a driving method thereof that can improve a moving image response time and an image quality without increasing a frame frequency.

The present embodiments can provide an organic light emitting display panel, an organic light emitting display, and a driving method thereof having a subpixel structure that makes high-speed driving possible without increasing the frame frequency.

The present embodiments can provide an organic light emitting display including an organic light emitting display panel in which a plurality of subpixels defined by a plurality of data lines and a plurality of gate lines are arranged.

Each subpixel in the organic light emitting diode display includes an organic light emitting diode, a driving transistor for driving the organic light emitting diode, a first transistor for transmitting a data voltage to a first node of the driving transistor, And a storage capacitor electrically coupled between the first node and the second node.

Such an organic light emitting display device can display a fake image irrespective of an actual image between image frames defined by the frame frequency.

The above-mentioned fake image may be, for example, a black image as an image irrelevant to the actual image displayed in the image frame.

For such an organic light emitting display, the visual frequency of the frame may be higher than the actual frame frequency.

In the organic light emitting display according to the embodiments, during one frame period defined by the frame frequency, each subpixel may have at least one light emission state change.

These embodiments are directed to organic light emitting display devices including a plurality of data lines for supplying data voltages, a plurality of gate lines for supplying scan signals, a plurality of data lines, and a plurality of sub- A light emitting display panel can be provided.

In this OLED display panel, each of the plurality of subpixels includes an organic light emitting diode, a driving transistor for driving the organic light emitting diode, a first transistor for transmitting a data voltage to a first node of the driving transistor, A storage capacitor electrically connected between the first node and the second node may be disposed.

The organic light emitting display panel may further include a fake scan transistor for on / off controlled by a fake scan signal applied to a gate node so as to control the driving of a real image or a fake image in a corresponding sub pixel. .

Such a fake scan transistor is turned on during a period in which a real image is displayed and is turned on during a period in which a fake image is displayed and is turned on to turn off the driving transistor to turn off the organic light- .

In one example, the fake scan transistor may be electrically connected between the first node and the second node of the driving transistor.

Such a fake scan transistor may be in a turn-off state when the first transistor is in a turn-on state.

Such a fake scan transistor may be turned on after the first transistor is turned off. Thus, the organic light emitting diode can be non-emitted.

As another example, the fake scan transistor may be electrically connected between the gate node of the first transistor and the first node of the driving transistor, or between the gate line electrically connected to the gate node of the first transistor and the first node of the driving transistor. .

The present embodiments can provide a method of driving an organic light emitting display including an organic light emitting display panel having a plurality of subpixels defined by a plurality of data lines and a plurality of gate lines and arranged in a matrix type.

The driving method of the OLED display device includes sequentially emitting a plurality of subpixel rows sequentially when i (i is a natural number equal to or greater than 1) frame period starts, and when a predetermined time has elapsed after an i-th frame period starts , Sequentially emitting a plurality of subpixel rows, and sequentially emitting a plurality of subpixel rows when an (i + 1) th frame period starts.

According to the embodiments as described above, it is possible to provide a high-speed fake drive that makes it appear to be driven at a high speed while driving at a low speed.

In addition, according to the present embodiments, it is possible to provide a high-speed fake driving that can improve the video response time and image quality without increasing the frame frequency.

In addition, according to the embodiments, it is possible to provide a sub-pixel structure that makes it look like high-speed driving without raising the frame frequency.

In addition, according to the embodiments, deterioration of the driving transistor can be restored while making the display look like high-speed driving without raising the frame frequency.

Further, according to the present embodiments, it is possible to provide a high-speed fake driving considering the light emission efficiency for each color.

Further, according to the present embodiments, it is possible to independently provide high-speed pake driving for each color or each color group.

In addition, according to the embodiments, deterioration of image quality due to high-speed fake driving can be prevented.

1 is a schematic system configuration diagram of an organic light emitting display according to the present embodiments.
FIG. 2 is a view illustrating a sub-pixel structure of an OLED display according to an embodiment of the present invention. Referring to FIG.
3 is a view illustrating another example of the sub-pixel structure of the OLED display according to the present embodiments.
4 and 5 are two exemplary views of the sub-pixel structure of FIG. 3 of the OLED display according to the present embodiments.
6 is a diagram illustrating low-speed driving and high-speed driving of the organic light emitting diode display according to the present embodiments.
7 is a signal waveform diagram of a data voltage or a scan signal according to the low-speed drive and the high-speed drive of the organic light emitting diode display according to the present embodiments.
FIG. 8 is a diagram illustrating a high-speed driving of a Fake of the organic light emitting diode display according to the present embodiments.
FIGS. 9 and 10 are diagrams illustrating characteristics of a fast fake driving of the organic light emitting diode display according to the present embodiments and screen changes.
11 is a view showing a case where the driving time lengths of the real driving and the fake driving are the same when the fake driving of the organic light emitting display according to the present embodiments is performed at a high speed.
FIG. 12 is a diagram illustrating a case in which the driving time lengths of the real driving and the fake driving are different at the time of high-speed driving of the fakes of the organic light emitting diode display according to the present embodiments.
FIG. 13 is a diagram for explaining a control method for high-speed driving of a pake of the organic light emitting diode display according to the present embodiments.
FIG. 14 is a diagram illustrating a first sub-pixel structure for high-speed driving of a pake in an organic light emitting display according to the present embodiments.
FIGS. 15A, 15B, and 16 are diagrams illustrating a scan signal and a fake scan signal in a first sub-pixel structure for fast fake driving of an organic light emitting display according to the present embodiments.
17 is a diagram illustrating a second sub-pixel structure for high-speed fake driving of the organic light emitting display according to the present embodiments.
FIGS. 18A, 18B, and 19 are diagrams illustrating a scan signal and a fake scan signal in a second sub-pixel structure for high-speed fake driving of the organic light emitting diode display according to the present embodiments.
20 is a view showing subpixels for each color in the OLED display according to the present embodiments.
FIG. 21 is a diagram illustrating a case in which the display time of a fake image of subpixels of each color is the same in the organic light emitting display according to the present embodiments.
22 to 24 are diagrams illustrating a case where at least one of display time of a fake image of each color subpixel is different in the organic light emitting display according to the present embodiments.
25 is a view illustrating simultaneous control of display time of a fake image of subpixels for each color in the organic light emitting diode display according to the present embodiments.
FIGS. 26 to 29 are diagrams showing individual independent control of the display time of the fake images of subpixels for respective colors in the organic light emitting display according to the present embodiments.
FIGS. 30 to 32 are views showing independent control of color groups for the display time of a fake image of each color subpixel in the organic light emitting display according to the present embodiments.
FIGS. 33 and 34 illustrate exemplary configurations of a fake scan transistor for simultaneously controlling the display time of a fake image of each color subpixel in the organic light emitting diode display according to the present embodiments.
FIG. 35 shows a configuration of a fake scan transistor for simultaneous control and independent control (individual independent control, independent control for each color group) of the fake image display time of each color subpixel in the organic light emitting display according to the present embodiments. Fig.
FIG. 36 is a diagram illustrating a configuration of a fake scan transistor for independent control of a color group for a display time of a fake image of each color subpixel in the organic light emitting display according to the present embodiments.
FIG. 37 is a diagram illustrating an example of arrangement of gate lines for transferring a fake scan signal in the OLED display according to the present embodiments.
FIG. 38 is an exemplary view showing the length of a turn-on level voltage section of a fake scan transistor corresponding to each color subpixel in the organic light emitting display according to the present embodiments.
FIG. 39 is an exemplary view showing a fake image display time for subpixels for each color in the OLED display according to the present embodiments.
FIGS. 40 and 41 are views showing an organic light emitting display panel for high-speed pake driving of the organic light emitting display according to the present embodiments.
FIG. 42 is a flowchart of a method of driving the organic light emitting display according to the present embodiments.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

FIG. 1 is a schematic system configuration diagram of an organic light emitting diode display 100 according to the present embodiments.

1, the OLED display 100 according to the present embodiment includes a plurality of data lines DL and a plurality of gate lines GL, a plurality of data lines DL, An OLED display panel 110 in which a plurality of sub pixels (SP) defined by a gate line GL are arranged in a matrix type, a data driver 120 for driving a plurality of data lines DL, A gate driver 130 for driving a plurality of gate lines GL 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, switches the input image data input from the outside according to the data signal format used by the data driver 120, and outputs the converted image data , And controls the data driving at a suitable time according to the scan.

The controller 140 may be a timing controller used in a conventional display technology or a control device including a timing controller to perform other control functions.

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

The data driver 120 drives 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 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) 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), as the case may be.

The gate driver 130 sequentially supplies the scan signals to the plurality of gate lines GL to sequentially drive the plurality of gate lines GL. Here, the gate driver 130 is also referred to as a " scan driver ".

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

Each gate driver IC (GDIC) may include a shift register, a level shifter, and the like.

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 the data voltage to a plurality of data lines DL.

1, the data driver 120 may be located only on one side (for example, on the upper side or the lower side) of the organic light emitting display panel 110, and in some cases, depending on the driving method, And may be located on both sides (e.g., upper and lower sides) of the display panel 110.

1, the gate driver 130 may be located only on one side (e.g., the left side or the right side) of the organic light emitting display panel 110, and depending on the driving method, the panel design method, And may be located on both sides (e.g., left and right sides) of the light emitting display panel 110.

The controller 140 described above is capable of outputting various kinds of signals including the vertical synchronization signal Vsync, the horizontal synchronization signal Hsync, the input data enable signal (DE), and the clock signal (CLK) Timing signals from the outside (e.g., the host system).

The controller 140 receives a timing signal such as a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, an input DE signal, and a clock signal to control the data driver 120 and the gate driver 130, And generates various control signals and outputs them to the data driver 120 and the gate driver 130.

For example, in order to control the gate driver 130, the controller 140 generates a gate start pulse (GSP), a gate shift clock (GSC), a gate output enable signal GOE Gate Output Enable), and the like.

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 the shift timing of the scan signal (gate pulse). The gate output enable signal GOE specifies the timing information of one or more gate driver ICs.

In order to control the data driver 120, the controller 140 may further include a source start pulse (SSP), a source sampling clock (SSC), a source output enable signal (SOE) And outputs various data control signals (DCS: Data Control Signals).

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 for controlling 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.

Each subpixel SP arranged in the organic light emitting display panel 110 includes an organic light emitting diode (OLED), a driving transistor for driving the organic light emitting diode (OLED) And the like.

The types and the number of the circuit elements constituting each subpixel SP can be variously determined depending on the providing function, the design method, and the like.

2 is an exemplary view of a sub-pixel structure of the OLED display 100 according to the present embodiments.

Referring to FIG. 2, in the organic light emitting diode display 100 according to the present embodiment, each of the sub-pixels SP basically includes an organic light emitting diode OLED, a driving circuit for driving the organic light emitting diode OLED A first transistor T1 for transmitting a data voltage to a first node N1 corresponding to a gate node of a driving transistor DRT and a driving transistor DRT; And a storage capacitor (Cst: Storage Capacitor) that holds the voltage corresponding thereto for a predetermined time (e.g., one frame time or half frame time, etc.).

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

A base voltage EVSS may be applied to the second electrode of the organic light emitting diode OLED.

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

The driving transistor DRT has a first node N1, a second node N2, and a third node N3.

The first node N1 of the driving transistor DRT is a node corresponding to a gate node and may be electrically connected to a source node or a drain node of the first transistor T1.

The second node N2 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 third node N3 of the driving transistor DRT may be electrically connected to a driving voltage line DVL that supplies a driving voltage EVDD as a node to which the driving voltage EVDD is applied, Node or source node.

The driving transistor DRT and the first transistor T1 may be implemented as an n-type or a p-type as illustrated in FIG.

The first transistor T1 is electrically connected between the data line DL and the first node N1 of the driving transistor DRT and receives the scan signal SCAN through the gate line have.

The first transistor T1 may be turned on by the scan signal SCAN to transfer the data voltage Vdata supplied from the data line DL to the first node N1 of the driving transistor DRT .

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

The storage capacitor Cst is not a parasitic capacitor (for example, Cgs or Cgd) which is an internal capacitor existing between the first node N1 and the second node N2 of the driving transistor DRT, And is an external capacitor intentionally designed outside the driving transistor DRT.

3 is another example of the sub-pixel structure of the OLED display 100 according to the present embodiments.

Referring to FIG. 3, each sub-pixel disposed in the organic light emitting display panel 110 according to the present exemplary embodiment includes an organic light emitting diode OLED, a driving transistor DRT, a first transistor T1, In addition to the storage capacitor Cst, it may further include a second transistor T2.

3, the second transistor T2 is electrically connected between the second node N2 of the driving transistor DRT and a reference voltage line RVL for supplying a reference voltage Vref And may be controlled by receiving a sensing signal SENSE, which is a kind of a scan signal, to the gate node.

The second transistor T2 is turned on by the sensing signal SENSE and applies a reference voltage Vref supplied through the reference voltage line RVL to the second node N2 of the driving transistor DRT .

The driving transistor DRT, the first transistor T1 and the second transistor T2 may be either an n-type transistor or a p-type transistor.

Referring to FIG. 3, the OLED display 100 according to the present embodiment includes an analog to digital converter (ADC) for measuring the voltage of the reference voltage line RVL and converting the voltage to a digital value, An initialization switch SPRE for controlling whether or not the reference voltage Vref is applied to the second node N2 of the driving transistor DRT and the connection between the reference voltage line RVL and the analogue digital converter ADC And a sampling switch (SAM) for controlling the sampling switch (SAM).

The initialization switch SPRE is connected to the second node N2 of the driving transistor DRT so that the second node N2 of the driving transistor DRT in the sub-pixel SP becomes a voltage state reflecting the characteristic value of the desired circuit element. To the voltage application state.

When the initialization switch SPRE is turned on, the reference voltage Vref is supplied to the reference voltage line RVL and is supplied to the second node N2 of the driving transistor DRT through the second transistor T2, ). ≪ / RTI >

The sampling switch (SAM) is turned on to electrically connect the reference voltage line (RVL) and the analog-to-digital converter (ADC).

The sampling switch SAM is turned on so that the second node N2 of the driving transistor DRT in the subpixel SP turns on when the voltage state reflects the characteristic value of the desired circuit element Respectively.

When the sampling switch (SAM) is turned on, the analog-to-digital converter (ADC) can sense the voltage of the connected reference voltage line (RVL).

If the resistance component of the driving transistor DRT can be ignored when the second transistor T2 is turned on when the analog digital converter ADC senses the voltage of the reference voltage line RVL, The voltage measured by the second transistor ADC may correspond to the voltage of the second node N2 of the driving transistor DRT.

The voltage measured by the analog-to-digital converter (ADC) may be the voltage of the reference voltage line RVL, that is, the voltage of the second node N2 of the driving transistor DRT.

If a line capacitor is present on the reference voltage line RVL, the voltage sensed by the analog to digital converter ADC may be the voltage charged in the line capacitor on the reference voltage line RVL.

In the OLED display 100 according to the present embodiment, as the driving time of each sub-pixel SP becomes longer, the driving voltage of the organic light emitting diode OLED, the driving transistor DRT, Degradation can proceed.

Accordingly, inherent characteristic values of the circuit elements such as the organic light emitting diode (OLED) and the driving transistor (DRT) can be changed. Here, the intrinsic property value of the circuit element may include a threshold voltage of the organic light emitting diode OLED, a threshold voltage of the driving transistor DRT, a mobility of the driving transistor DRT, and the like.

A change in the characteristic value of the circuit element may cause a change in luminance of the corresponding subpixel. Therefore, the change in the characteristic value of the circuit element can be used in the same concept as the change in luminance of the subpixel.

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

Such a difference in degree of characteristic value change between circuit elements may cause a deviation in characteristic value between circuit elements, resulting in luminance deviation between subpixels. Therefore, the characteristic value deviation between the circuit elements can be used in the same concept as the luminance deviation between the subpixels.

Variations in the characteristic values of the circuit elements (luminance variation of the subpixels) and characteristic deviations between the circuit elements (luminance deviation between the subpixels) cause problems such as degradation of the accuracy of luminance expressions of subpixels or occurrence of screen anomalies .

Accordingly, the OLED display 100 according to the present embodiments can provide a sensing function for sensing a characteristic value for a subpixel and a compensation function for compensating a subpixel characteristic value using a sensing result.

Sensing the characteristic value for the subpixel means sensing a characteristic value or a characteristic value change of a circuit element (a driving transistor DRT, an organic light emitting diode (OLED)) in a subpixel or a circuit element (driving transistor DRT) , Organic light emitting diode (OLED)).

In addition, compensating the characteristic value for the subpixel means to change the characteristic value or characteristic value of the circuit element (driving transistor DRT, organic light emitting diode (OLED)) in the subpixel to a predetermined level, DRT), and organic light emitting diode (OLED)).

Driving to make the voltage of the second node N2 of the driving transistor DRT reflect the characteristic value or the change thereof is necessary in order to sense the characteristic value for the subpixel.

After such driving is proceeded, the voltage of the driving transistor DRT is measured through the reference voltage line RVL, and the characteristic value for the subpixel is sensed based on the measured voltage.

In this regard, the voltage measured by the analog-to-digital converter (ADC) is a voltage value (Vdata-Vth or Vdata-? Vth, Vdata-Vth) including the threshold voltage Vth or threshold voltage deviation? : The data voltage for the driving operation), or a voltage value for sensing the mobility of the driving transistor DRT.

3, the second transistor T2 is electrically connected between the second node N2 of the driving transistor DRT and the reference voltage line RVL. Therefore, the sub-pixel structure of the driving transistor DRT Since it is easy to control the voltage state of the second node N2, it is possible to more effectively perform the display driving and the sensing driving, and the second node of the driving transistor DRT, which can reflect the characteristic value of the subpixel through sensing driving, It is easy to measure the voltage of the node N2.

4 and 5 are two exemplary views of the subpixel structure of FIG. 3 of the OLED display 100 according to the present embodiments.

As shown in FIG. 4, the switching operation of the first transistor T1 and the second transistor T2 can be independently controlled.

In this case, the scan signal SCAN applied to the gate node of the first transistor T1 and the sense signal SENSE applied to the gate node of the second transistor T2 may be different gate signals.

That is, the first transistor T1 receives the scan signal SCAN through the first gate line GL1 as a gate node,

The second transistor T2 receives the sensing signal SENSE through the second gate line GL2 to the gate node.

In this case, two gate lines GL1 and GL2 for gate driving must be disposed in the OLED display panel 110. [

As shown in FIG. 5, the switching operation of the first transistor T1 and the second transistor T2 can be simultaneously controlled.

In this case, the scan signal SCAN applied to the gate node of the first transistor T1 and the sense signal SENSE applied to the gate node of the second transistor T2 are the same gate signal.

In this case, the sensing signal SENSE applied to the gate node of the second transistor T2 is referred to as a scan signal SCAN.

That is, the gate node of the first transistor T1 and the gate node of the second transistor T2 are simultaneously connected to one gate line GL to receive the scan signal SCAN at the same time.

In this case, one gate line GL for gate driving may be disposed on the organic light emitting diode display panel 110.

Hereinafter, a driving method for reducing the moving picture response time (MPRT) and improving the picture quality will be described.

Prior to describing this driving method, a case of low-speed driving at a frame frequency corresponding to the first frequency and a case of high-speed driving at a second frequency higher than the first frequency will be described first. Hereinafter, a high-speed fake driving method will be described in which the frame frequency corresponding to the first frequency is actually used to drive at a low speed, but the speed at the second frequency is higher than the first frequency.

In this specification, it is assumed that a first frequency, which is a frame frequency for low-speed driving, is 120 Hz and a second frequency, which is a frame frequency for high-speed driving, is 240 Hz.

This is for convenience of explanation, and the first frequency, which is the frame frequency for low-speed driving, may be 60 Hz, and the second frequency, which is the frame frequency for high-speed driving, may be 120 Hz.

In addition, as long as the second frequency is higher than the first frequency, the first frequency and the second frequency may be any values.

FIG. 6 is a diagram illustrating low-speed driving and high-speed driving of the organic light emitting diode display 100 according to the present embodiment. FIG. 7 is a timing chart showing the operation of the organic light emitting diode display 100 according to the present embodiment, (Vdata) or a scan signal (SCAN).

Referring to FIG. 6, a frame interval is divided by a blank interval.

Referring to FIG. 6, in the case of a low-speed drive driven at a frame frequency corresponding to 120 Hz, subpixel rows are driven sequentially one frame period.

In the case of high-speed driving driven at a frame frequency corresponding to 240 Hz, two sub-pixel rows are sequentially driven for one frame period.

Thus, for a 240 Hz drive driven at a frame frequency of 240 Hz, the data and gate drive must run at twice the speed of 120 Hz drive. That is, the supply (input) of the data voltage and the scan signal must be performed twice as fast.

Therefore, a high-performance data driver 120 and a gate driver 130 are required to reduce the moving picture response time (MPRT) and improve the picture quality.

However, when the organic light emitting display panel 110 is designed with a large area and a high resolution, since the RC load of the data line DL and the gate line GL is large, : 240 Hz).

When the signal waveform shown in FIG. 7 is regarded as a signal waveform of the scan signal SCAN, when the high-speed driving is performed at a frame frequency (for example, 240 Hz) faster than 120 Hz, It can not be done.

Therefore, the voltage of the gate line GL at the driving time point may be lower than the desired voltage value by a constant voltage value? V.

Due to such a voltage error, the gate line GL can not be turned on and off at a normal timing, thereby causing a screen abnormal phenomenon.

When the signal waveform shown in FIG. 7 is taken as a signal waveform of the data voltage (Vdata), data can not be quickly charged when the high-speed driving is performed at a frame frequency (for example, 240 Hz) faster than 120 Hz.

Therefore, the voltage charged in the storage capacitor Cst at the time of driving can be lowered by a certain voltage? V than the desired voltage value.

Due to such a data charging error, a screen image phenomenon such as a screen drag phenomenon or an image overlap phenomenon may occur.

Accordingly, the organic light emitting diode display 100 according to the present embodiments can provide a fake high speed driving method that makes it seem as though the high speed driving is performed with the naked eye, while actually performing the low speed driving .

8 is a diagram illustrating a high-speed fake driving of the OLED display 100 according to the present embodiments.

Referring to FIG. 8, the organic light emitting display 100 according to the present embodiments is driven at a low driving frame frequency (for example, 120 Hz) (Fake High Speed Driving) which makes it appear as though it is driving at a high speed with a high frequency (e.g., Hz).

According to the high-speed fake driving, a fake image which is not related to a real image is displayed between image frames in which a real image is displayed according to an actual frame frequency (for example, 120 Hz) .

In this specification, the actual image is an image expressed by the image data supplied from the controller 140 to the data driver 120, and the fake image is stored in the sub-pixel without supplying the image data from the controller 140 to the data driver 120 Is an image expressed through voltage state control of a node (e.g., N1 node, or N1 and N2 nodes).

In the present specification, a screen on which a fake image is displayed is also referred to as a fake frame.

According to this, the naked eye recognized frame frequency may be a value (e.g. 240 Hz) higher than the actual frame frequency (e.g. 120 Hz).

According to such high-speed fake driving, since a fake image is more visible between the actual image and the actual image in the user's eyes, one frame becomes like two frames (image frame, fake frame). As a result, at high speed driving frame frequency (for example, 240 Hz), high-speed driving seems to be performed visually while driving at a low driving frame frequency (for example, 120 Hz).

According to this pake high-speed driving, during one frame period defined by an actual frame frequency (for example, 120 Hz) corresponding to a low-speed driving frame frequency, each subpixel SP has one of the following light emission state changes Change can be seen.

(1) Light emitting state to non-light emitting state

(2) Non-light emitting state? Light emitting state? Non-light emitting state

(3) Non-light emitting state → light emitting state

(4) Light emission state → non-light emission state → light emission state

(5) Light emitting state to non-light emitting state

In other words, according to the high-speed fake driving, during one frame period defined by the actual frame frequency (for example, 120 Hz) corresponding to the low-speed driving frame frequency, each subpixel SP has at least one light emission state change A change from a light emitting state to a non-light emitting state, or a change from a non-light emitting state to a light emitting state).

As described above, since one sub-pixel changes its emission state more than once during one frame period, one frame period can be seen as two or more frame periods with the naked eye.

The above-mentioned fake image (Fake Image or Fake Picture) is an image that is irrelevant to the actual image (Real Image or Real Picture), and may be, for example, a black image.

In addition, a fake frame can be referred to as a non-light-emitting frame by visualizing a fake image and recognizing it as if it is a single frame in the naked eye.

According to the above description, while the actual image is displayed at the actual frame frequency, by inserting the black image as the fake image between the actual images, the user can feel as if the image is changing at a higher speed. Therefore, high-speed fake driving can be easily implemented through the black image insertion method.

Referring to FIG. 8, the fast fake driving includes real driving for displaying an actual image and fake driving for inserting (displaying) a fake image between actual images.

Referring to FIG. 8, when a first frame period starts, a plurality of sub-pixel rows sequentially emit light. Here, the drive for causing the plurality of sub-pixels SP to emit light in accordance with the start of each frame period is referred to as "real driving ".

When the first frame period starts and a certain time (? T) elapses, a plurality of subpixel rows are sequentially turned off. Here, the drive for sequentially causing non-emission of a plurality of sub-pixel rows is referred to as "Fake Driving ".

When the second frame period starts, a plurality of subpixel rows are sequentially emitted through real driving.

The above-mentioned real driving is a driving method for displaying an actual image, and proceeds as a general driving method of emitting the organic light emitting diode OLDE in the sub pixel of the organic light emitting display panel 110. [

For example, real driving can proceed in the following manner.

The first transistor T1 and the second transistor T2 are both turned on and the data voltage Vdata and the reference voltage Vdata are applied to the first node N1 and the second node N2 of the driving transistor DRT, Vref. Thereafter the first transistor T1 is turned off and the second transistor T2 is turned off or the initialization switch SPRE is turned off so that the first node N1 of the driving transistor DRT, And all of the nodes N2 are floated. As a result, the voltages of the first node N1 and the second node N2 of the driving transistor DRT rise. When the voltage of the second node N2 of the driving transistor DRT rises by a voltage value capable of driving the organic light emitting diode OLED, current flows to the organic light emitting diode OLED, .

Fake driving that enables high-speed fake driving according to the present embodiments is a drive for displaying a fake image and is a separate driving method for displaying a fake image (e.g., a black image) from the data driver 120 Based on the operation of the circuit elements in the sub-pixel, rather than the data-driven operation in which the data voltage is supplied.

For example, when a certain time (? T) has elapsed since the real driving starts, the driving transistors (DRT) in each sub-pixel are sequentially turned off so that the organic light emitting diodes OLED in each sub- .

FIGS. 9 and 10 are diagrams showing the characteristics of fast fake driving of the organic light emitting diode display device 100 according to the present embodiments and the screen change.

As described above, according to the pake high-speed driving according to the present embodiments, during one frame period defined by the actual frame frequency (for example, 120 Hz) corresponding to the low-speed driving frame frequency, each sub- (A change from a light emitting state to a non-light emitting state, or a change from a non-light emitting state to a light emitting state) at least once.

As a result, when the screen is viewed at a specific time point, a real image is displayed in at least one area, and a fake image is displayed in at least one area.

Referring to FIGS. 9 and 10, when the screen 1010 is viewed at t = t1, a real image is displayed in an upper portion of the screen, a fake image (e.g., a black image) is displayed in a center region of the screen, The actual image is displayed in the lower area of the screen.

Referring to FIGS. 9 and 10, when the screen 1020 is viewed at t = t2, an actual image is displayed in an upper portion of the screen, and a fake image (eg, a black image) is displayed in a lower portion of the screen.

Referring to FIGS. 9 and 10, when a screen 1030 is viewed at t = t3, a fake image (e.g., a black image) is displayed in an upper area of the screen, an actual image is displayed in a center area of the screen, A fake image (eg, black image) is displayed in the lower area of the screen.

According to the above-described high-speed fake driving, one subpixel, during the temporal length of one frame period as seen from the viewpoint of one subpixel, is progressively driven to display a real image, The fake driving can be performed.

On the other hand, the time during which the actual image is displayed (i.e., the real driving time) is reduced by the fake driving. Therefore, it is necessary to instantaneously increase the luminance by the amount corresponding to the decrease of the time for displaying the actual image according to the fake image display.

Such an instantaneous luminance increase may act as an electrical stress to the organic light emitting diode (OLED), thereby shortening the lifetime of the organic light emitting diode (OLED).

Therefore, it is necessary to appropriately adjust the length of the fake driving time in consideration of a sudden change in luminance due to the fake driving.

11 is a view showing a case where the driving time lengths of the real driving and the fake driving are the same when the organic light emitting diode display 100 according to the present embodiments is driven at a high speed of a fake.

As shown in Fig. 11, the driving time length RT of the real driving and the driving time length FT of the fake driving may be the same. That is, the length RT of the section in which the actual image is displayed may be equal to the length FT of the section in which the fake image is displayed.

Here, in this specification, the drive time length RT of the real drive is also referred to as the length of the section in which the actual image (real image) is displayed, the real drive time length, or the real image display time.

The drive time length FT of the fake drive is also referred to as the length of the section in which the fake image (black image) is displayed, the length of the fake drive time, or the fake image display time (black image display time)

As described above, since the real driving and the fake driving are performed for the same time, the driving timing can be easily controlled.

FIG. 12 is a diagram illustrating a case in which the driving time lengths of the real driving and the fake driving are different when the organic light emitting diode display 100 according to the present embodiments is driven at a high speed of a fake.

As shown in FIG. 12, the driving time length RT of the real driving and the driving time length FT of the fake driving may be different from each other. That is, the length RT of the section in which the actual image is displayed may be different from the length FT of the section in which the fake image is displayed.

For example, as shown in FIG. 12, the driving time length RT of the real driving may be longer than the driving time length FT of the fake driving. That is, the length RT of the section in which the actual image is displayed may be longer than the length FT of the section in which the fake image is displayed.

As described above, by shortening the fake driving time length (FT) compared to the real driving time length (RT), that is, displaying the fake image (black image) in a shorter time than the actual image, It is possible to reduce the electrical stress applied to the circuit elements of the organic light emitting diode (OLED) and the like in spite of the increase of the brightness, thereby preventing the shortening of the life of the circuit elements such as the organic light emitting diode (OLED).

As described above, the fake high-speed driving according to the present embodiments is performed at a low-speed driving, as in the case of high-speed driving in the naked eye, by inserting a fake image (for example, a black image) It is a drive that makes you see.

The embodiments of the present invention are not limited to inserting a fake image (for example, a black image) between actual images through data supply for a fake image, but rather a fake image (e.g., a black image) To be seen.

Hereinafter, a method of inserting a fake image (e.g., a black image) between actual images will be described in detail.

FIG. 13 is a schematic view for explaining a control method for high-speed driving of the organic light emitting diode display 100 according to the present embodiments.

5, a sub-pixel structure is assumed in which the gate node of the first transistor T1 and the gate node of the second transistor T2 are connected to the same gate line GL as shown in FIG. 5 .

Referring to FIG. 13, in a period in which a fake image is displayed (a fake driving period), a plurality of sub-pixels SP are not sequentially emitted.

To this end, the voltage state of the first node N1 of the driving transistor DRT is controlled in the period (the fake driving period) in which the fake image is displayed.

For example, the first node N1 and the second node N2 of the driving transistor DRT may have the same voltage level in a section in which a fake image is displayed (a fake driving period). That is, the potential difference between the first node N1 and the second node N2 of the driving transistor DRT becomes almost zero.

As another example, in a period (a fake driving period) in which a fake image is displayed, the first node N1 of the driving transistor DRT has a turn-off level voltage (for example, it may be a negative potential as VGL) .

According to the above-described two voltage control methods, the driving transistor DRT of each sub-pixel is sequentially turned off during the fake driving period (during the non-emission period), and the organic light emitting diodes OLED of each sub- Emitting state. As a result, a fake image (e.g., a black image) can be displayed.

In the organic light emitting display 100 according to the present embodiment, each of the plurality of subpixels SP is turned off for a period (real driving period) during which an actual image is displayed And may further include a Fake Scan Transistor (TM) that is turned on during a period (a fake driving period) during which a fake image is displayed.

Such a fake scan transistor TM may be turned on to turn off the driving transistor DRT to emit no light to the organic light emitting diode OLED.

According to the above description, the turn-on timing and the turn-on hold time of the fake scan transistor TM can be adjusted to adjust the starting point of the fake driving and the fake driving time length FT. That is, by adjusting the turn-on timing and the turn-on holding time of the fake scan transistor TM, the time at which display of a fake image (e.g., a black image) starts and the length of time at which a fake image You can adjust it.

Accordingly, the organic light emitting diode display 100 according to the present exemplary embodiment can provide an efficient fake high-speed operation through the on-off timing control of the pake scan transistor TM, taking into consideration the video response speed, image quality, Driving can be performed.

The fake scan signal SCAN_TM for controlling on / off of the fake scan transistor TM is output from the gate driver 130 in accordance with the timing of the controller 140.

In the following, two sub-pixel structures corresponding to the two voltage control schemes described above will be described.

FIG. 14 is a diagram illustrating a first sub-pixel structure for high-speed fake driving of the OLED display 100 according to the present embodiments.

14, the fake scan transistor TM disposed in each sub-pixel for fake driving can be electrically connected between the first node N1 and the second node N2 of the driving transistor DRT .

This fake scan transistor TM can be controlled by a scan scan signal SCAN_TM applied to the gate node.

According to the connection structure of the fake scan transistor TM in the first sub-pixel structure, the first node N1 of the driving transistor DRT and the second node N1 of the driving transistor DRT are turned on and off, (The potential difference between both ends of the storage capacitor Cst) of the storage capacitor N2 can be efficiently controlled.

15A, 15B and 16 are diagrams showing a scan signal SCAN and a fake scan signal SCAN_TM in a first sub-pixel structure for high-speed pake driving of the organic light emitting diode display 100 according to the present embodiments. to be.

15A, 15B, and 16 are diagrams for explaining a case where a subpixel (real driving mode) which changes from a light emitting state to a non-light emitting state during one frame period defined by an actual frame frequency (for example, 120 Hz) corresponding to a low- Off control of the first transistor T1 and the fake scan transistor TM included in the sub-pixel in which the real image is displayed and the fake image is displayed through the fake driving.

Referring to FIG. 15A, the real driving time length RT is equal to the fake driving time FT, and the turn-on level voltage section of the fake scan signal SCAN_TM may correspond to the fake driving time FT.

15B, the real drive time length RT is longer than the fake drive time FT, and the turn-on level voltage section of the fake scan signal SCAN_TM is longer than the fake drive time FT ).

In some cases, the turn-on level voltage section of the fake scan signal SCAN_TM may be shorter than the fake drive time FT, as shown in Fig. 16B. In this case, The turn-on level voltage (for example, VGH) may be applied for only a short time during 1-hour (Horizontal Time).

Referring to FIGS. 15A, 15B and 16, when the scan signal SCAN applied to the gate node of the first transistor T1 is a turn-on level voltage (for example, VGH) The fake scan signal SCAN_TM applied to the gate node is a turn-off level voltage (e.g., VGL).

15A, 15B and 16, when the scan signal SCAN applied to the gate node of the first transistor T1 is at a turn-on level voltage (for example, VGH) to a turn-off level voltage (for example, VGL ), The fake scan signal SCAN_TM applied to the gate node of the fake scan transistor TM is changed to a turn-on level voltage (for example, VGH).

Thus, the fake driving starts and the fake image is displayed.

The time point at which the turn-on level voltage (for example, VGH) of the fake scan signal SCAN_TM is applied to the gate node of the fake scan transistor TM corresponds to the start time of the section in which the fake image is displayed (the fake driving section).

On the other hand, the fake scan transistor TM can be turned on at any time after the first transistor T1 is turned off.

In other words, the fake scan transistor TM must be turned off when the first transistor T1 is turned on. However, the turn-on point of the fake scan transistor TM can be freely determined irrespective of the turn-off point of the first transistor T1.

Therefore, regardless of the turn-off point of the first transistor T1, the potential difference between the first node N1 and the second node N2 of the driving transistor DRT becomes zero, TM can be freely adjusted by controlling the turn-on time of the fake image (in FIG. 8, corresponding to the area corresponding to the fake image).

On the other hand, the turn-on level voltage (e.g., VGH or VGL) of the scan signal SCAN and the turn-on level voltage (e.g., VGH or VGL) of the fake scan signal SCAN_TM may be the same voltage value, Value.

The turn-off level voltage (e.g., VGL or VGH) of the scan signal SCAN and the turn-off level voltage (e.g., VGL or VGH) of the fake scan signal SCAN_TM may be the same voltage value have.

17 is a diagram illustrating a second sub-pixel structure for high-speed fake driving of the OLED display 100 according to the present embodiments.

17, the fake scan transistor TM disposed in each subpixel for fake driving is connected between the gate node NG1 of the first transistor T1 and the first node N1 of the driving transistor DRT As shown in FIG.

Alternatively, the fake scan transistor TM arranged in each subpixel for the fake driving is connected to the gate line GL electrically connected to the gate node NG1 of the first transistor T1 and the first gate line GL1 of the driving transistor DRT, And may be electrically connected between the node N1.

This fake scan transistor TM can be controlled by a scan scan signal SCAN_TM applied to the gate node.

According to the connection structure of the fake scan transistor TM in the second sub-pixel structure, the voltage of the first node N1 of the driving transistor DRT can be efficiently . ≪ / RTI >

18A, 18B and 19 are diagrams showing a scan signal SCAN and a fake scan signal SCAN_TM in a second sub-pixel structure for high-speed fake driving of the organic light emitting diode display 100 according to the present embodiments. to be.

18A, 18B, and 19 are diagrams for explaining a case where a subpixel (real driving mode) which changes from a light emitting state to a non-light emitting state during one frame period defined by an actual frame frequency (for example, 120 Hz) corresponding to a low- Off control of the first transistor T1 and the fake scan transistor TM included in the sub-pixel in which the real image is displayed and the fake image is displayed through the fake driving.

18A, the real driving time length RT corresponding to the length of the section in which the actual image is displayed and the fake driving time FT corresponding to the length of the section in which the fake image is displayed may be the same. In this case, , The turn-on level voltage section of the fake scan signal SCAN_TM may correspond to the fake driving time FT.

18B, the real driving time length RT corresponding to the length of the section in which the actual image is displayed is smaller than the fake driving time FT corresponding to the length of the section in which the fake image is displayed It is long. In this case, the turn-on level voltage section of the fake scan signal SCAN_TM may correspond to the fake drive time FT.

19, the turn-on level voltage section of the fake scan signal SCAN_TM may be shorter than the fake drive time FT. In this case, the turn-on level voltage section of the fake scan signal SCAN_TM may be shorter than the fake drive time FT. The turn-on level voltage (for example, VGH) may be applied for only a short time during 1-hour (Horizontal Time).

Referring to FIGS. 18A, 18B and 19, when the scan signal SCAN applied to the gate node of the first transistor T1 is a turn-on level voltage (for example, VGH) The fake scan signal SCAN_TM applied to the gate node is a turn-off level voltage (e.g., VGL).

Referring to FIGS. 18A, 18B and 19, the scan signal SCAN applied to the gate node of the first transistor Tl is turned on at a turn-on level voltage (for example, VGH) ), The fake scan signal SCAN_TM applied to the gate node of the fake scan transistor TM is changed to a turn-on level voltage (for example, VGH).

Thus, the fake driving starts and the fake image is displayed.

The time point at which the turn-on level voltage (for example, VGH) of the fake scan signal SCAN_TM is applied to the gate node of the fake scan transistor TM corresponds to the start time of the section in which the fake image is displayed (the fake driving section).

On the other hand, the fake scan transistor TM can be turned on at any time after the first transistor T1 is turned off.

In other words, the fake scan transistor TM must be turned off when the first transistor T1 is turned on. However, the turn-on time of the fake scan transistor TM can be determined freely irrespective of the turn-off time of the first transistor T1.

Therefore, regardless of the turn-off point of the first transistor T1, the potential of the first node N1 of the drive transistor DRT becomes the turn-off level voltage (e.g., VGL) By controlling the turn-on point, it is possible to freely adjust the length of time (in FIG. 8, corresponding to the area corresponding to the fake image) in which the fake image is displayed.

18 and 19, when the fake scan transistor TM is turned on by the fake scan signal SCAN_TM of the turn-on level voltage when the first transistor Tl is in the turn-off state, The scan transistor TM applies a turn-off level voltage (e.g., VGL) of the scan signal SCAN applied to the gate node of the first transistor T1 to the first node N1 of the drive transistor DRT I can do it.

Here, the turn-off level voltage (e.g., VGL) of the scan signal SCAN may have a negative voltage value.

In this manner, the turn-off level voltage (e.g., VGL) of the scan signal SCAN having a negative voltage value is input to the first node N1 corresponding to the gate node of the driving transistor DRT to perform the fake driving , It is possible to obtain an additional effect of restoring (recovering) deterioration of the driving transistor DRT.

On the other hand, the turn-on level voltage (e.g., VGH or VGL) of the scan signal SCAN and the turn-on level voltage (e.g., VGH or VGL) of the fake scan signal SCAN_TM may be the same voltage value, Value.

The turn-off level voltage (e.g., VGL or VGH) of the scan signal SCAN and the turn-off level voltage (e.g., VGL or VGH) of the fake scan signal SCAN_TM may be the same voltage value have.

20 is a diagram showing subpixels for each color in the OLED display 100 according to the present embodiments.

The plurality of subpixels arranged in the organic light emitting display panel 110 according to the present embodiments may be subpixels corresponding to N (N is a natural number equal to or greater than 3) colors.

For example, a plurality of subpixels arranged in the organic light emitting display panel 110 according to the present embodiment may include subpixels (R, G, B) corresponding to 3 (N = 3) ).

As another example, a plurality of subpixels arranged in the organic light emitting display panel 110 according to the present embodiments may include subpixels (R, W) corresponding to 4 (N = 4) , G, B).

(R, W, G, and B) corresponding to four colors (red, white, green, and blue) are formed on the organic light emitting display panel 110 according to the present embodiment for convenience of explanation. .

21 shows a case where the fake image display times FTr, FTw, FTg and FTb of the subpixels R, W, G and B for each color are the same in the OLED display 100 according to the present embodiment Fig.

21, the fake image display times FTr, FTw, FTg and FTb of the subpixels R, W, G and B for each color can be the same.

Thus, when the fake image display time FTr, FTw, FTg, FTb of each color subpixel R, W, G, B is the same, the subpixels R, W, G, So that it can be easily and efficiently driven (fake driving).

22 to 24 are schematic diagrams for explaining the fake image display time FTr, FTw, FTg, FTb of each color subpixel R, W, G, B in the OLED display 100 according to the present embodiment At least one of which is different.

22 to 24, in the organic light emitting diode display 100 according to the present embodiment, the fake image display time FTr, FTw, FTw, FTg, FTb) may be different.

Accordingly, the fake image display time of the sub-pixel corresponding to at least one color may be shorter than the fake image display time of the sub-pixel corresponding to the other color.

22, the fake image display time FTb of the sub-pixel B corresponding to the blue color is different from the fake image display time FTr, FTw, FTg of the sub-pixels R, W, ).

23, the fake image display times FTr and FTb of the red and blue subpixels R and B correspond to the fake image display times FTw and FTb of the subpixels W and G corresponding to the different colors, , FTg).

24, the fake image display time FTb of the sub-pixel B corresponding to the blue color is different from the fake image display time FTr, FTw, FTg of the sub-pixels R, W, ).

The fake image display time FTr and FTg of the subpixels R and G corresponding to red and green among the colors other than blue (red, white and green) May be shorter than the time FTw.

According to the above description, the display time of the real image can be made longer by shortening the display time of the fake image of the sub-pixel corresponding to the color having the relatively low luminous efficiency, which can complement the relatively low luminous efficiency, The image quality can be improved.

In the above-described examples, the fake image display time FTr, FTw, FTg of the subpixels R, W, G corresponding to the different colors of the fake image display time FTb of the subpixel B corresponding to the blue color, .

Thus, by shortening the display time of the fake image of a sub-pixel corresponding to blue having a relatively low luminous efficiency, it is possible to further increase the display time of the real image. Thus, in the sub-pixel corresponding to blue, It is possible to compensate the relatively low luminous efficiency, thereby improving the overall image quality.

25 is a timing chart showing the simultaneous control of the display time (FTr, FTw, FTg, FTb) of the subpixels R, W, G and B for each color in the OLED display 100 according to the present embodiment. Fig.

25, the fake image display time FTr, FTw, FTg, FTb of each color subpixel R, W, G, B can be controlled simultaneously.

This simultaneous control is suitable when the fake image display times (FTr, FTw, FTg, FTb) of the subpixels (R, W, G, B)

Here, the simultaneous control means that the fake image display time FTr, FTw, FTg, FTb of each color subpixel (R, W, G, B) And G and B are simultaneously driven and the on / off operation of one or the number of color scan transistors T 1 corresponding to each color subpixel R, W, G, .

Unlike the above-described simultaneous control, the fake image display time FTr, FTw, FTg, FTb of each color subpixel R, W, G, B may be independently controlled independently for each color. This is called individual independent control or color independent control.

Alternatively, the fake image display time FTr, FTw, FTg, FTb of each color subpixel R, W, G, B may be independently controlled for each color group. This is called independent control by color group.

As described above, the fake image display time FTr, FTw, FTg, FTb of each color subpixel R, W, G, B can be independently controlled for each color (independent independent control) When independently controlling (independent control for each color group), it is possible to provide more accurate control for each color characteristic.

On the other hand, the fake image display periods FTr, FTw, FTg and FTb of the subpixels R, W, G and B for each color are achieved by controlling the length of the turn- .

That is, the controller 140 controls the timing and length of the turn-on level voltage section of the fake scan signal SCAN_TM applied to the gate node of the fake scan transistor TM, Pixel display time of the corresponding subpixel or subpixel group by supplying the fake scan signal SCAN_TM to the gate node of the corresponding fake scan transistor TM.

26 to 29 are diagrams for explaining the operation of the organic light emitting display 100 according to the present embodiment in the case where the fake image display time FTr, FTw, FTg, FTb of the subpixels R, W, G, ≪ / RTI >

Referring to FIG. 26, individual independent control for individually and independently controlling the fake image display time (FTr, FTw, FTg, FTb) of each color subpixel (R, W, G, B) The display time of the fake images FTr, FTw, FTg, FTb of the subpixels R, W, G and B for each color must be controlled in the same manner.

Referring to FIG. 27, individual independent control for individually and independently controlling the fake image display time (FTr, FTw, FTg, FTb) of each color subpixel (R, W, G, B) The fake image display time FTb of the sub pixel B corresponding to blue among the fake image display times FTr, FTw, FTg and FTb of the subpixels R, W, G and B for each color is three (FTr, FTw, FTg) of the subpixels (R, W, G) corresponding to the color.

28, the individual independent control for individually and independently controlling the fake image display time (FTr, FTw, FTg, FTb) of each color subpixel (R, W, G, B) The fake image display time FTr of the subpixels R and B corresponding to red and blue among the fake image display periods FTr, FTw, FTg and FTb of the subpixels R, W, FTb should be controlled to be shorter than the fake image display time FTw, FTg of the sub-pixels W, G corresponding to the remaining two colors.

29, the individual independent control for individually and independently controlling the fake image display time (FTr, FTw, FTg, FTb) of each color subpixel (R, W, G, B) The fake image display time FTb of the sub pixel B corresponding to blue among the fake image display periods FTr, FTw, FTg and FTb of the subpixels R, W, G and B for each color is the shortest, The fake image display time FTr and FTg of the red and green subpixels R and G are shortest next and the fake image display time FTwg of the white subpixel W is the longest It can be applied to the case where it should be.

30 to 32 illustrate a case in which the fake image display time FTr, FTw, FTg, FTb of each color subpixel R, W, G, B in the OLED display 100 according to the present embodiment And FIG.

30, the independent control for each color group is, for example, independent control for each 3: 1 color group. As shown in FIG. 22, the fake image display time (R, W, G, B) W, and G corresponding to the remaining three colors (red, white, green) of the fake image display time FTb of the subpixel B corresponding to blue among the subpixels FTr, FTr, FTw, FTg, FTr, FTw, and FTg of the video image display time (FTr, FTw, FTg).

Referring to FIG. 30, when subpixels (R, W, G) corresponding to red, white and green are viewed as a first color group and subpixels (B) corresponding to blue are regarded as a second color group, The fake image display periods FTr, FTw and FTg of the one color group R, W and G are controlled simultaneously and can be controlled independently of the fake image display time FTb of the second color group B .

That is, the fake image display time (FTr, FTw, FTg) of the first color group (R, W, G) and the fake image display time (FTb) of the second color group (B) can be independently controlled.

The fake image display time FTr of the sub pixel R corresponding to the red color belonging to the first color group R, W and G and the fake image display time FTw of the sub pixel W corresponding to the white color group R, And the fake image display time FTg of the sub-pixel G corresponding to green can be simultaneously controlled.

31, the independent control for each color group is, for example, independent control for each 2: 2 color group. As shown in FIG. 23, the fake image display time (R, W, G, B) (F, FTb) of the subpixels (W, G) corresponding to the remaining two colors of the fake image display time (FTr, FTb) of the subpixels (R, B) Can be applied to a case where the display time is to be controlled to be shorter than the display time (FTw, FTg).

31, when subpixels (R, B) corresponding to red and blue are viewed as a first color group and subpixels (W, G) corresponding to white and green are viewed as a second color group, The fake image display periods FTr and FTb of the one color group R and B can be controlled independently of the fake image display periods FTw and FTg of the second color groups W and G .

That is, the fake image display times FTr and FTb of the first color groups R and B and the fake image display periods FTw and FTg of the second color groups W and G can be independently controlled.

However, the fake image display time FTr of the sub pixel R corresponding to the red color belonging to the first color group R and the fake image display time FTb of the sub pixel B corresponding to the blue color are simultaneously Lt; / RTI >

Referring to FIG. 32, the independent control for each color group includes, for example, 1: 2: 1 independent color group control. As shown in FIG. 24, The fake image display time FTb of the subpixel B corresponding to blue among the time FTr, FTw, FTg and FTb is the shortest and the fake image display time of the subpixels R and G corresponding to red and green (FTr, FTg) is next shortest and the fake image display time (FTwg) of the sub pixel W corresponding to white is to be controlled to be the longest.

Referring to FIG. 32, the subpixels W corresponding to white are regarded as a first color group, the subpixels (R, G) corresponding to red and green are regarded as a second color group, The fake image display time FTw of the first color group W and the fake image display time FTr and FTg of the second color group R and G are compared with the fake image display time FTw of the first color group W, The fake image display time FTb of the third color group B can be controlled independently.

The fake image display time FTr of the sub pixel R corresponding to the red color belonging to the second color group R and G and the fake image display time FTg of the sub pixel G corresponding to the green color are simultaneously Lt; / RTI >

In the above description, the relationship between the size of the fake image display time (FTr, FTw, FTg, FTb) of each color subpixel (R, W, G, B) (R, W, G, and B) of each color are described below. The control method (simultaneous control, individual independent control, and color group independent control) for the fake image display time (FTr, FTw, FTg, FTb) (Simultaneous control, individual independent control, color group independent control) for the fake image display time (FTr, FTw, FTg, FTb) of the fake scan transistor (TM) ).

As described above, the OLED display 100 according to the present embodiments may include a fake scan transistor TM to control the fake driving and control the fake image display time.

Such a fake scan transistor TM can be controlled to be turned on or off by a fake scan signal SCAN_TM applied to a gate node so as to be an actual image drive or a fake image drive in a corresponding sub-pixel.

Also, the fake scan transistor TM may be in a turn-off state during a period in which the actual image is displayed, and may be turned on during a period in which the fake image is displayed.

This Fake Scan transistor TM is turned on to turn off the driving transistor DRT to turn off the organic light emitting diode OLED so that the corresponding sub pixel does not emit light, Video so that the user can feel as though the frame frequency is higher than the actual frame frequency.

One such fake scan transistor TM may be arranged for each sub-pixel, or one for each of two or more sub-pixels.

According to the above description, one fake scan transistor (TM) may be designed to be shared by two or more subpixels depending on whether the fake image display time of two or more subpixels is controlled simultaneously or individually, (TM) may exist for each sub-pixel.

In accordance with the control method (simultaneous control, individual independent control, color group independent control) for the fake image display time (FTr, FTw, FTg, FTb) of each color subpixel (R, W, G, B) The connection structure and control (on-off control) of the fake scan transistor (TM) will be described.

14, a first connection structure in which a pake scan transistor TM is connected between a first node N1 and a second node N2 of the driving transistor DRT, 17, among the second connection structure in which the fake scan transistor TM is connected between the first node N1 of the driving transistor DRT and the gate node NG1 of the first transistor T1 or the gate line, The connection structure is mainly described.

For convenience of explanation, the fake scan transistor TM is briefly shown.

For convenience of explanation, the structure of each subpixel is briefly shown by omitting the circuit elements (T1, T2, Cst, OLED) other than the driving transistor.

FIGS. 33 and 34 are exemplary configurations of a fake scan transistor TM for simultaneous control of display time of a fake image of each color subpixel in the organic light emitting diode display 100 according to the present embodiments.

Referring to FIG. 33, a plurality of subpixels may be composed of n (n is 3 or more) color subpixels (R, W, G, B).

n is the number of kinds of colors of light emitted from the sub-pixels, and may be a natural number of 3 or more, and in the following, n is four.

That is, in the following, the subpixels arranged in the organic light emitting display panel 110 are assumed to be composed of four color subpixels including red, white, green and blue.

Referring to FIG. 33, when n subpixels (R, W, G, B) corresponding to n colors (red, white, green and blue) are referred to as one subpixel group, The n subpixels R, W, G and B belonging to the same are shared by the n fake scan transistors TMr, TMw, TMg and TMb receiving the same fake scan signal SCAN_TM as gate nodes, Can be controlled.

As described above, n pake scan transistors TMr, TMw, TMg and TMb corresponding to n subpixels R, W, G and B are arranged, and n pake scan transistors TMr, TMw and TMg And TMb are controlled to be one common fake scan signal SCAN_TM, it is possible to increase the control efficiency for the fake driving and the fake video display time, and also to reduce the number of gate lines.

21, the gate driving structure and the control method for controlling ON / OFF of the n pake scan transistors TMr, TMw, TMg, and TMb using one common fake scan signal SCAN_TM, FTr, FTw, FTg, FTb of the subpixels (R, W, G, B) for each color are the same.

34, n subpixels (R, W, G, B) belonging to one subpixel group are commonly controlled by one pake scan transistor TM to display a fake image It is possible.

As described above, by using one common fake scan transistor TM to commonly control the fake driving and fake image display time of each of the n sub-pixels R, W, G and B, The control efficiency with respect to the video display time can be improved, and the number of transistors and the number of gate lines can be considerably reduced.

Such a gate driving structure and a control method are suitable for application when the fake image display times FTr, FTw, FTg, FTb of the subpixels R, W, G, Do.

FIG. 35 is a block diagram of an organic light emitting diode display 100 according to an embodiment of the present invention. In FIG. 35, a fake scan for simultaneous control and independent control (individual independent control, independent control for each color group) FIG. 8 is a configuration example of a transistor TM; FIG.

35, a plurality of subpixels are formed of n subpixels (R, W, G, B) corresponding to n colors (red, white, N) corresponding to n subpixels (R, W, G, and B) belonging to one subpixel group, when the subpixels R, W, , TMg, TMb) can be independently performed.

In this case, the gate nodes of the n fake scan transistors TMr, TMw, TMg and TMb corresponding to the n subpixels R, W, G and B belonging to one subpixel group are connected to n gate lines GLr , GLw, GLg, and GLb.

Accordingly, the gate nodes of the n number of the pake scan transistors TMr, TMw, TMg, and TMb can receive n pake scan signals SCAN_TMr, SCAN_TMw, SCAN_TMg, and SCAN_TMb.

As described above, the ON-OFFs of the n number of the pake scan transistors TMr, TMw, TMg and TMb corresponding to the n subpixels R, W, G and B are independently controlled independently of each other, (R, W, G, and B) corresponding to the red, green, and blue subpixels (R, W, G, and B) can be independently and individually controlled. This makes it possible to control more precisely.

FIG. 36 is a diagram illustrating a configuration of a fake scan transistor TM for independent control of each color group with respect to a fake image display time of each color subpixel in the OLED display 100 according to the present embodiments.

In FIG. 35, as an example for explaining independent control by color group, the independent control by 3: 1 color group illustrated in FIG. 30 is exemplified. That is, when the subpixels (R, W, G) corresponding to red, white and green are regarded as the first color group and the subpixel (B) corresponding to the blue color is regarded as the second color group, A case in which the fake image display time FTr, FTw, FTg of the first color group R, W, G is controlled simultaneously but is controlled independently of the fake image display time FTb of the second color group B is exemplified.

36, a plurality of subpixels are formed of n subpixels (R, W, G, B) corresponding to n colors (red, white, (For example, blue) of n subpixels (R, W, G, B) belonging to one subpixel group when one subpixel group is referred to as a subpixel group The on-off control of the fake scan transistor TMb corresponding to the sub-pixel B and the operation of the fake scan transistors TMr, TMw, and TMg corresponding to sub-pixels corresponding to different colors ) Can be independently performed.

Here, at least one color (e.g., blue) belongs to one color group, and the other colors (e.g., red, white, green) belong to another color group or to two or more color groups .

The gate node of the fake scan transistor TMb corresponding to the subpixel B corresponding to at least one color (e.g., blue) of the n subpixels (R, W, G, B) belonging to one subpixel group. And the gate nodes of the fake scan transistors (e.g., TMr, TMw, TMg) corresponding to the subpixels corresponding to the different colors (e.g., red, white, green) are connected to different gate lines (e.g., GLb and GLrwg) Can be connected.

In the example of FIG. 36, since the subpixels (R, W, G) corresponding to red, white and green are regarded as the first color group and the subpixel (B) corresponding to the blue color is regarded as the second color group , The gate node of the fake scan transistor TMb corresponding to the blue subpixel B among the n subpixels R, W, G, and B belonging to one subpixel group is connected to the gate line GLb The gate nodes of the fake scan transistors TMr, TMw and TMg corresponding to the sub-pixels R, W and G corresponding to the remaining three colors (red, white and green) are connected to one another gate line GLrwg do.

Accordingly, the gate node of the fake scan transistor TMb corresponding to the subpixel B corresponding to the blue color receives the fake scan signal SCAN_TMb through the gate line GLb. The gate nodes of the fake scan transistors TMr, TMw and TMg corresponding to the sub-pixels R, W and G corresponding to the remaining three colors (red, white, and green) SCAN_TMrwg.

Accordingly, the sub-pixels R, W, and G corresponding to the three colors (red, white, and green) belonging to the first color group are simultaneously controlled for the fake driving and the fake image display time.

The fake driving and fake image display time of the sub pixel B corresponding to the blue color belonging to the second color group and the sub pixels R, W and G corresponding to the remaining three colors (red, white, green) Can be independently controlled.

According to the above description, it is possible to provide a gate structure and a gate driving method that are suitable for controlling the fake driving and the fake image display time and are efficient in performing independent control for each color group.

On the other hand, gate lines for on / off control of the fake scan transistors of each subpixel arranged in each subpixel row may be arranged for each subpixel row.

Alternatively, as illustrated in FIG. 37, gate lines for on-off control of the fake scan transistors of each subpixel arranged in each subpixel row may be arranged for two or more subpixel rows .

37 is a diagram illustrating an example of arrangement of gate lines for transferring a scan scan signal SCAN_TM in the OLED display 100 according to the present embodiments.

Referring to FIG. 37, in a first sub pixel row and a second sub pixel row adjacent to each other in the column direction, subpixels R, Corresponding to the gate nodes of the fake scan transistors TMr, TMw, TMg and TMb corresponding to the sub-pixels W, G and B and the sub-pixels R, W, G and B arranged in the second sub- The gate nodes of the transistors TMr, TMw, TMg, TMb may be connected in common to one gate line GLrwg, GLb.

As described above, the structure in which the gate lines for transferring the pixel scan signals for on-off control of the fake scan transistors of each subpixel arranged in two or more subpixel rows are shared in two or more subpixel rows The aperture ratio of the organic light emitting display panel 110 can be increased as the number of gate lines is reduced.

38 is an exemplary view showing the length of a turn-on level voltage section of the fake scan transistor TM corresponding to each color subpixel in the OLED display 100 according to the present embodiment, FIG. 8 is a diagram illustrating a fake image display time for subpixels for each color in the OLED display 100 according to the present embodiments.

38 and 39, a plurality of subpixels are composed of n subpixels for each color (n is 3 or more), and n subpixels corresponding to n colors (e.g., red, white, green, and blue) At least one of the n subpixels (e.g., R, W, G, B) belonging to one subpixel group (e.g., R, W, G and B) The turn-on level voltage section length Ton1 of the fake scan signal SCAN_TM applied to the gate node of the fake scan transistor (for example, TMb) corresponding to the sub-pixel (for example, blue) (E.g., SCAN_TMr, SCAN_TMw, SCAN_TMg, SCAN_TMrwg) applied to the gate nodes of the fake scan transistors (e.g., TMr, TMw, TMg) corresponding to the subpixels corresponding to the different colors (e.g., red, , Or SCAM_TM such as SCAN_TMrb) and the turn-on level voltage section length (Ton2).

(E.g., blue) corresponding to at least one of n subpixels (e.g., R, W, G, B) corresponding to n colors (e.g., red, white, green, blue) By controlling the turn-on level voltage section length Ton1 of the fake scan signal SCAN_TM applied to the gate node of the fake scan transistor (for example, TMb) corresponding to the sub-pixel (for example, B) It is possible to control the real driving, the fake driving, the real video display time and the fake video display time in accordance with the luminous efficiency of each color even if there is an efficiency deviation, thereby improving image quality You can.

As a more specific example, a subpixel corresponding to a subpixel (e.g., B) corresponding to at least one color (e.g., blue) of n subpixels (e.g., R, W, G, The turn-on level voltage section length Ton1 of the fake scan signal SCAN_TM applied to the gate node of the fake scan transistor (for example, TMb) is set to a subpixel corresponding to another color (e.g., red, white, or green) (E.g., SCAM_TMr, SCAN_TMw, SCAN_TMg, SCAN_TMrwg, or SCAN_TMrb) applied to the gate node of the corresponding fake scan transistor (e.g., TMr, TMw, TMg) and the turn- Ton2) (Ton1 < Ton2).

Here, the turn-on level voltage section length corresponds to the fake image display time.

Accordingly, the display time of the fake image of the sub-pixel corresponding to at least one color having a relatively low luminous efficiency can be shortened, thereby realizing a longer real-image display time. Accordingly, the relatively low luminous efficiency in the sub-pixel corresponding to at least one color having a relatively low luminous efficiency can be compensated, thereby improving the overall image quality.

The at least one color that shortens the turn-on level voltage section length may include, for example, blue having a relatively low luminous efficiency as compared to other colors.

Accordingly, by shortening the fake image display time FTb of the sub-pixel B corresponding to blue having a relatively low luminous efficiency, it is possible to make the real image display time longer, The relatively low luminous efficiency in the sub-pixel B can be compensated for, thereby improving the overall image quality.

40 is a view illustrating an organic light emitting display panel 110 for high-speed pake driving of the OLED display 100 according to the present embodiments.

Referring to FIG. 40, the organic light emitting display panel 110 for high-speed pake driving of the OLED display 100 according to the present invention includes a plurality of data lines DL for supplying a data voltage Vdata, A plurality of gate lines GL for supplying a scan signal SCAN and a plurality of subpixels SP defined and arranged by a plurality of data lines DL and a plurality of gate lines GL.

Each of the plurality of subpixels SP basically includes an organic light emitting diode OLED, a driving transistor DRT for driving the organic light emitting diode OLT, a first node N1 of the driving transistor DRT, And a storage capacitor Cst electrically connected between the first node N1 and the second node N2 of the driving transistor DRT are arranged .

In some cases, each of the plurality of sub-pixels SP may further include a second transistor T2 electrically connected between the second node N2 of the driving transistor DRT and the reference voltage line RVL .

40, each of the plurality of sub-pixels SP is further provided with a fake scan transistor TM electrically connected between the first node N1 and the second node N2 of the driving transistor DRT .

The fake scan transistor TM may be in a turn-off state when the first transistor T1 is in a turn-on state.

The fake scan transistor TM may be turned on to turn off the organic light emitting diode OLED which is emitting light after the first transistor T1 is turned off.

The organic light emitting display panel 110 described above has a subpixel structure including a fake scan transistor TM for controlling a potential difference between the first node N1 and the second node N2 of the driving transistor DRT Therefore, a fake image according to non-light emission can be displayed between the actual image and the actual image. As a result, it can be visually made to appear to be driven at a high-speed driving frequency (for example, 240 Hz) higher than an actual low-speed driving frame frequency (for example, 120 Hz).

FIG. 41 is another diagram showing an organic light emitting display panel 110 for high-speed pake driving of the OLED display 100 according to the present embodiments.

41, the organic light emitting display panel 110 for high-speed pake driving of the OLED display 100 according to the present invention includes a plurality of data lines DL for supplying a data voltage Vdata, A plurality of gate lines GL for supplying a scan signal SCAN and a plurality of subpixels SP defined and arranged by a plurality of data lines DL and a plurality of gate lines GL.

Each of the plurality of subpixels SP basically includes an organic light emitting diode OLED, a driving transistor DRT for driving the organic light emitting diode OLT, a first node N1 of the driving transistor DRT, And a storage capacitor Cst electrically connected between the first node N1 and the second node N2 of the driving transistor DRT are arranged .

In some cases, each of the plurality of sub-pixels SP may further include a second transistor T2 electrically connected between the second node N2 of the driving transistor DRT and the reference voltage line RVL .

41, each of the plurality of subpixels SP is electrically connected between the gate node NG1 of the first transistor T1 and the first node N1 of the driving transistor DRT, A fake scan transistor TM electrically connected between the gate line GL electrically connected to the gate node NG1 of the transistor T1 and the first node N1 of the driving transistor DRT may further be arranged .

The fake scan transistor TM may be in a turn-off state when the first transistor T1 is in the turn-on state.

The fake scan transistor TM may be turned on to turn off the organic light emitting diode OLED after the first transistor T1 is turned off.

Since the organic light emitting display panel 110 has the subpixel structure including the fake scan transistor TM for controlling the voltage of the first node N1 of the driving transistor DRT, So that a fake image corresponding to the non-light emission can be displayed. As a result, it can be visually made to appear to be driven at a high-speed driving frequency (for example, 240 Hz) higher than an actual low-speed driving frame frequency (for example, 120 Hz).

FIG. 42 is a flowchart of a driving method of the OLED display 100 according to the present embodiments.

42, an organic light emitting display panel 110 including an organic light emitting display panel 110 defined by a plurality of data lines DL and a plurality of gate lines GL and having a plurality of subpixels SP arranged in a matrix type, The driving method of the display apparatus 100 includes a step S4210 of sequentially emitting a plurality of subpixel rows when the i-th frame period starts, a step S4210 of, when a certain time period? Step S4220 of sequentially luminescing a plurality of sub-pixel rows, step S4230 of sequentially emitting a plurality of sub-pixel rows when the (i + 1) th frame period starts, and the like.

Step S4220 is started before all the subpixel rows emit in the i-th frame period.

Accordingly, when the second half of the i &lt; th &gt; frame period is reached, step S4220 is started. Accordingly, the first sub-pixel row which is already in the light emitting state in the first half of the i-th frame period sequentially emits no light.

Before the step S4220 ends, the step S4230 is started.

Accordingly, when the subpixel row located at the center portion starts to emit light according to the step S4220, the step S4230 starts and sequentially emits light from the first subpixel row.

By using the driving method of the organic light emitting diode display 100 described above, a non-emission state is created between the actual image and the actual image so that a high-speed driving frame frequency (for example, : 240 Hz).

According to the embodiments as described above, it is possible to provide a high-speed fake drive that makes it appear to be driven at a high speed while driving at a low speed.

In addition, according to the present embodiments, it is possible to provide a high-speed fake driving that can improve the video response time and image quality without increasing the frame frequency.

In addition, according to the embodiments, it is possible to provide a sub-pixel structure that makes it look like high-speed driving without raising the frame frequency.

In addition, according to the embodiments, deterioration of the driving transistor DRT can be restored while making the driving frequency of the driving transistor DRT seem high-speed without raising the frame frequency.

Further, according to the present embodiments, it is possible to provide a high-speed fake driving considering the light emission efficiency for each color.

Further, according to the present embodiments, it is possible to independently provide high-speed pake driving for each color or each color group.

In addition, according to the embodiments, deterioration of image quality due to high-speed fake driving can be prevented.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: organic light emitting display
110: organic light emitting display panel
120: Data driver
130: gate driver
140: controller

Claims (32)

An organic light emitting display panel in which a plurality of subpixels defined by a plurality of data lines and a plurality of gate lines are arranged,
Each of the sub-
An organic light emitting diode,
A driving transistor for driving the organic light emitting diode,
A first transistor for transferring a data voltage to a first node of the driving transistor,
And a storage capacitor electrically connected between a first node and a second node of the driving transistor,
And displays a fake image that is independent of an actual image between image frames defined by the frame frequency. The method according to claim 1,
Wherein the fake image is a black image as an image independent of the actual image. The method according to claim 1,
Wherein the frame frequency recognized by the naked eye is higher than the frame frequency. The method according to claim 1,
The length of the section in which the actual image is displayed is,
And the length of a section in which the fake image is displayed. The method according to claim 1,
The length of the section in which the actual image is displayed is,
And the length of the section in which the fake image is displayed is longer than the length of the section in which the fake image is displayed. The method according to claim 1,
In the section in which the fake image is displayed,
Wherein the first node and the second node of the driving transistor have the same voltage level. The method according to claim 1,
In the section in which the fake image is displayed,
And a first node of the driving transistor has a turn-off level voltage. The method according to claim 1,
The display time of the fake image of each color subpixel is the same. The method according to claim 1,
The display time of the fake image of the sub-pixel corresponding to at least one color,
Pixel display time of a sub-pixel corresponding to another color. 10. The method of claim 9,
The display time of the fake image of the sub pixel corresponding to the blue color,
Pixel display time of a sub-pixel corresponding to another color. The method according to claim 1,
The fake image display time of each color sub-
An organic light emitting diode (OLED) display unit, and an OLED display unit. The method according to claim 1,
Further comprising a Fake Scan Transistor controlling ON / OFF by a fake scan signal applied to a gate node so as to be an actual image driving or a fake image driving in a corresponding sub pixel,
The fake scan transistor includes:
Off state during a period in which the actual image is displayed,
On state during a period in which the fake image is displayed,
And turns off the driving transistor to turn off the organic light emitting diode. 13. The method of claim 12,
The fake scan transistor includes:
Wherein the driving transistor is electrically connected between a first node and a second node of the driving transistor. 14. The method of claim 13,
When the scan signal applied to the gate node of the first transistor is a turn-on level voltage, the fake scan signal is a turn-off level voltage,
After the scan signal applied to the gate node of the first transistor is switched to the turn-off level voltage, the fake scan signal turns into a turn-on level voltage,
Wherein a time point at which the turn-on level voltage of the fake scan signal is applied corresponds to a start time point of a period in which the fake image is displayed. 13. The method of claim 12,
The fake scan transistor includes:
A first node of the driving transistor and a gate node of the first transistor,
Wherein the organic light emitting diode is electrically connected between a gate line electrically connected to a gate node of the first transistor and a first node of the driving transistor. 16. The method of claim 15,
When the scan signal applied to the gate node of the first transistor is a turn-on level voltage, the fake scan signal is a turn-off level voltage,
After the scan signal applied to the gate node of the first transistor is switched to the turn-off level voltage, the fake scan signal turns into a turn-on level voltage,
Wherein a time point at which the turn-on level voltage of the fake scan signal is applied corresponds to a start time point of a period in which the fake image is displayed. 16. The method of claim 15,
When the first transistor is in the turn-off state, when the fake scan transistor is turned on,
The fake scan transistor includes:
And applies a turn-off level voltage of a scan signal applied to a gate node of the first transistor to a first node of the drive transistor. 13. The method of claim 12,
Wherein the fake scan transistors are arranged one by one for each subpixel or one for every two or more subpixels. 13. The method of claim 12,
Wherein the plurality of subpixels comprises n (n is at least 3) subpixels for each color,
When n subpixels corresponding to n colors are referred to as one subpixel group,
And the n subpixels belonging to one subpixel group are commonly controlled to display a fake image by one pake scan transistor. 13. The method of claim 12,
Wherein the plurality of subpixels comprises n (n is at least 3) subpixels for each color,
When n subpixels corresponding to n colors are referred to as one subpixel group,
Wherein the n subpixels belonging to one subpixel group are commonly controlled to display a fake image by n fake scan transistors receiving the same fake scan signal to the gate node. 13. The method of claim 12,
Wherein the plurality of subpixels comprises n (n is at least 3) subpixels for each color,
When n subpixels corresponding to n colors are referred to as one subpixel group,
And on / off control of n number of pake scan transistors corresponding to n subpixels belonging to one subpixel group is performed independently. 13. The method of claim 12,
Wherein the plurality of subpixels comprises n (n is at least 3) subpixels for each color,
When n subpixels corresponding to n colors are referred to as one subpixel group,
On-off control of a fake scan transistor corresponding to a subpixel corresponding to at least one color among n subpixels belonging to one subpixel group and on-off control of a fake scan transistor corresponding to a subpixel corresponding to another color, Off control is performed independently. 13. The method of claim 12,
Wherein the plurality of subpixels comprises n (n is at least 3) subpixels for each color,
When n subpixels corresponding to n colors are referred to as one subpixel group,
A turn-on level voltage section length of a fake scan signal applied to a gate node of a fake scan transistor corresponding to a subpixel corresponding to at least one color among n subpixels belonging to one subpixel group,
And a turn-on level voltage section length different from a fake scan signal applied to a gate node of a fake scan transistor corresponding to a sub-pixel corresponding to another color. 24. The method of claim 23,
A turn-on level voltage section length of a fake scan signal applied to a gate node of a fake scan transistor corresponding to a subpixel corresponding to at least one color among n subpixels belonging to one subpixel group,
And a scan scan signal applied to a gate node of a fake scan transistor corresponding to a sub-pixel corresponding to another color is shorter than a turn-on level voltage section length. 25. The method of claim 24,
Wherein the at least one color comprises blue. 13. The method of claim 12,
Wherein the plurality of subpixels comprises n (n is at least 3) subpixels for each color,
When n subpixels corresponding to n colors are referred to as one subpixel group,
And gate nodes of n number of fake scan transistors corresponding to n subpixels belonging to one subpixel group are connected to and connected to n gate lines. 13. The method of claim 12,
Wherein the plurality of subpixels comprises n (n is at least 3) subpixels for each color,
When n subpixels corresponding to n colors are referred to as one subpixel group,
A gate node of a fake scan transistor corresponding to a subpixel corresponding to at least one color among n subpixels belonging to one subpixel group and a gate node of a fake scan transistor corresponding to a subpixel corresponding to another color, And an organic light emitting display connected to the gate lines. 13. The method of claim 12,
In the first subpixel row and the second subpixel row adjacent to each other in the column direction,
A gate node of a fake scan transistor corresponding to a subpixel arranged in the first subpixel row and a gate node of a fake scan transistor corresponding to a subpixel arranged in the second subpixel row are common to one gate line And the organic light emitting diode is connected to the organic light emitting diode. A plurality of data lines for supplying a data voltage;
A plurality of gate lines for supplying scan signals; And
A plurality of subpixels defined and arranged by the plurality of data lines and the plurality of gate lines,
In each of the plurality of subpixels,
An organic light emitting display comprising: an organic light emitting diode; a driving transistor for driving the organic light emitting diode; a first transistor for transmitting a data voltage to a first node of the driving transistor; and a second transistor electrically connected between the first node and the second node of the driving transistor. Connected storage capacitors are placed,
Further comprising a Fake Scan Transistor controlling ON / OFF by a fake scan signal applied to a gate node so as to be an actual image driving or a fake image driving in a corresponding sub pixel,
The fake scan transistor includes:
Off state during a period in which the actual image is displayed,
On state during a period in which the fake image is displayed,
And turns off the driving transistor to turn off the organic light emitting diode. 30. The method of claim 29,
The fake scan transistor includes:
And a second node electrically connected between the first node and the second node of the driving transistor,
The fake scan transistor includes:
When the first transistor is in a turn-on state, it is in a turn-off state,
And the organic light emitting display panel is turned on after the first transistor is turned off. 30. The method of claim 29,
The fake scan transistor includes:
A first node of the driving transistor and a gate node of the first transistor,
Wherein the organic light emitting display panel is electrically connected between a gate line electrically connected to a gate node of the first transistor and a first node of the driving transistor. A method of driving an organic light emitting display including an organic light emitting display panel defined by a plurality of data lines and a plurality of gate lines and a plurality of subpixels arranged in a matrix type,
sequentially emitting a plurality of subpixel rows when i (i is a natural number equal to or greater than 1) frame period starts;
Sequentially emitting the plurality of subpixel rows when a predetermined time elapses after the i &lt; th &gt; frame period starts; And
and sequentially emitting the plurality of subpixel rows when an (i + 1) th frame period starts.

Images