KR20190080036A - Organic light emitting display device and method for driving the organic light emitting display device - Google Patents

Abstract

Embodiments of the present invention relate to an organic light emitting display device and a method for driving the same capable of preventing a line defect or block defect which may be caused by sensing driving. More specifically, the organic light emitting display device comprises: a display panel having a plurality of gate lines, a plurality of gate lines, a plurality of sensing lines, and a plurality of sub pixels disposed thereon; a temperature/humidity measurement unit obtaining temperature information and humidity information of the display panel; at least one sensing unit measuring a sensing voltage from the plurality of sensing lines and outputting sensing data with respect to at least one sub pixel among the plurality of sub pixels; and a controller including a compensation unit configured to receive the sensing data and calculate compensation data for the at least one sub pixel. The controller determines a condensation environment according to the temperature information and the humidity information measured by the temperature/humidity measurement unit and controls the sensing unit to measure the sensing voltage when it is determined that the condensation environment is not created.

Description

TECHNICAL FIELD [0001] The present invention relates to an organic light emitting display device and an organic light emitting display device,

Embodiments of the present invention relate to an organic light emitting display and a driving method thereof.

2. Description of the Related Art [0002] As an information-oriented society develops, there have been various demands for a display device for displaying images. Recently, a liquid crystal display (LCD), a plasma display panel (PDP) And various display devices such as an organic light emitting display (OLED) device are used.

Recently, an organic light emitting diode (OLED) display device that has been well known in the art has an advantage of high response speed, contrast ratio, luminous efficiency, brightness and viewing angle by using an organic light emitting diode (OLED)

Each of the sub-pixels arranged in the organic light emitting display panel of the organic light emitting display device is basically composed of a driving transistor for driving the organic light emitting diode, a switching transistor for transmitting the data voltage to the gate node of the driving transistor, And a capacitor that serves to maintain the capacitor.

On the other hand, the driving transistors in each sub-pixel have characteristic values such as a threshold voltage and a mobility. Such characteristic values may vary from one driving transistor to another due to manufacturing tolerances and the like.

Also, as the driving time becomes longer, the driving transistor is degraded and the characteristic value may be changed. Due to the difference in degree of deterioration of the driving transistor, a characteristic value deviation between the driving transistors may occur.

The organic light emitting diodes in each subpixel may also have a manufacturing tolerance. As the driving time increases, deterioration proceeds, characteristic values such as the threshold voltage may change, and the degree of deterioration between the organic light emitting diodes may be different. A characteristic value deviation between the organic light emitting diodes in the pixel may occur.

The deviation of the characteristic value between the sub-pixels caused by the characteristic value deviation between the driving transistors and the characteristic value deviation between the organic light emitting diodes causes a luminance deviation between the sub pixels, resulting in a screen abnormal phenomenon such as a screen afterimage or a luminance unevenness of the display panel .

Therefore, a technique for compensating a characteristic value deviation between subpixels has been proposed. The compensation method includes a method of storing initial compensation data obtained by measuring a characteristic value deviation between subpixels at the time of manufacture and compensating data to be applied to the subpixel using initial compensation data stored in a memory, Pixels, sensing characteristics of the driving transistor or the organic light emitting diode of the sub-pixel to sense data, sensing the data of the driving transistor or the organic light emitting diode, A method of compensating data to be applied to the subpixel based on the data is used.

However, moisture can be penetrated (vaporized) into the display panel by various factors, and the penetrated moisture can be agglomerated depending on the use environment. If the organic light emitting display device is compensated for sensing driving of the organic light emitting display device in a state where moisture is coagulated, an erroneous compensation or over compensation may be caused due to electrolytic corrosion or a short circuit.

Such erroneous or over-compensation may cause a line defect or a block defect in the display device.

It is an object of embodiments of the present invention to provide an organic light emitting display device and a method of driving the same that can prevent line defects or block defects caused by sensing driving.

It is another object of embodiments of the present invention to provide an organic light emitting display device and a driving method thereof that can perform sensing driving according to use environment conditions.

In one aspect, an organic light emitting diode display according to embodiments of the present invention includes a plurality of gate lines, a plurality of data lines, a plurality of sensing lines, a display panel having a plurality of sub pixels, At least one sensing unit for sensing a sensing voltage from a plurality of sensing lines and outputting sensing data for at least one of the plurality of subpixels and sensing data, And a compensation unit for calculating compensation data for the pixel.

Such a controller can determine the coagulation environment according to the temperature information and the humidity information measured by the temperature / humidity measurement unit, and if not the coagulation environment, the sensing unit can control to measure the sensing voltage.

In the controller, wet bulb temperature information according to temperature and humidity is stored in advance in the form of a look-up table (LUT), and a wet bulb temperature corresponding to temperature information and humidity information is checked in a look-up table , The coagulation environment can be determined.

The controller determines the driving time after the organic light emitting display device is powered on if it is judged to be a coherent environment and controls the sensing section not to measure the sensing voltage if the determined driving time is less than the predetermined reference time.

The temperature / humidity measuring unit may include a plurality of temperature sensors and a plurality of humidity sensors which are dispersedly disposed at predetermined positions on the display panel.

The controller analyzes the temperature information and the humidity information obtained from the plurality of temperature sensors and the plurality of humidity sensors when the drive time exceeds the predetermined reference time to determine the coagulated environment zone where the coagulation environment occurred on the display panel, It is possible to control the sensing unit to measure the sensing voltage with respect to the sensing area except for the cohesive environment area on the display panel.

The controller may compute compensation data for at least one subpixel included in the coherent environment zone in accordance with the compensation data obtained in the area adjacent to the coherent environmental zone in the sensing zone.

The controller can determine the cohesion environment and control the sensing unit during an off-sensing process for calculating compensation data for at least one subpixel after the power off command is received.

The OLED display may further include a gate driver for driving the plurality of gate lines and a data driver for driving the plurality of data lines.

The temperature and humidity measuring unit may include at least one temperature sensor and at least one humidity sensor disposed on one side of the display panel where the data driver is connected.

The data driver may include a plurality of source driver integrated circuits driving at least one data line arranged in a corresponding one of the plurality of data lines on the display panel.

The at least one sensing portion may be disposed in each of the plurality of source driver integrated circuits to measure the sensing voltage from at least one sensing line disposed in the data driving region in which the corresponding source driver integrated circuit is driven.

The temperature and humidity measuring unit may include a plurality of temperature sensors and a plurality of humidity sensors disposed adjacent to each of the plurality of pad units electrically connecting the plurality of source driver integrated circuits in the display panel.

In another aspect, a method of driving an organic light emitting display according to embodiments of the present invention includes the steps of acquiring temperature information and humidity information of a display panel, determining a cohesion environment according to temperature information and humidity information, Alternatively, measuring the sensing voltage from a plurality of sensing lines to output sensing data for at least one of the plurality of subpixels, and receiving sensing data to compute compensation data for at least one subpixel . ≪ / RTI >

The step of outputting the sensing data may include the steps of: determining driving time after the organic light emitting display device is turned on when the organic light emitting display device is determined to be a flocculation environment; and if the determined driving time is less than a predetermined reference time, Determining a coagulation environment zone where a coagulation environment occurred on the display panel in accordance with temperature information and humidity information when the driving time exceeds a reference time, and determining a sensing voltage for the sensing zone excluding the coagulation environment zone on the display panel The method may further comprise the step of measuring.

According to embodiments of the present invention as described above, it is possible to provide an organic light emitting display device and a driving method thereof that can prevent a line defect or a block defect due to sensing driving.

According to embodiments of the present invention, it is possible to provide an organic light emitting display device and a driving method thereof that can perform sensing driving according to use environment conditions.

1 is a schematic system configuration diagram of an organic light emitting display according to embodiments.
2 is an exemplary view of a sub-pixel structure of an organic light emitting diode display according to embodiments.
3 is an exemplary diagram of a compensation circuit of an organic light emitting display according to embodiments.
4 is a diagram for explaining a threshold voltage sensing driving method for a driving transistor of an organic light emitting display according to embodiments.
5 is a view for explaining a mobility sensing driving method for a driving transistor of an organic light emitting diode display according to embodiments.
6 is a diagram showing sensing timing of the OLED display according to the embodiments.
7 is a view illustrating an embodiment of an organic light emitting display according to embodiments of the present invention.
8 and 9 are views schematically showing a connection structure of a display panel and a data driver according to embodiments of the present invention.
10 is a view illustrating a pad region and a bonding region of a display panel according to embodiments of the present invention.
11 is a graph illustrating a wet bulb temperature for determining an agglomerating environment according to embodiments of the present invention.
12 is a view illustrating an embodiment of an OLED display according to another embodiment of the present invention.
13 is a diagram for explaining a sensing area and a non-sensing area according to embodiments of the present invention.
FIG. 14 illustrates a method of driving an organic light emitting display according to embodiments of the present invention.

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 embodiments.

Referring to FIG. 1, an OLED display 100 according to embodiments 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 line GL are arranged, a data driver 120 driving a plurality of data lines DL, A gate driver 130 for driving the line GL, a controller 140 for controlling the data driver 120 and the gate driver 130, and the like.

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

The controller 140 starts scanning according to the timing implemented in each frame, 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. In the present invention, the controller 140 may include a compensation unit that performs a compensation process to compensate for a characteristic value deviation between subpixels.

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

Each source driver integrated circuit (SDIC) may include a shift register, a latch circuit, a digital to analog converter (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 driving unit 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 in some cases, depending on the driving 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 timing signals 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.

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

Referring to FIG. 2, in the organic light emitting diode display 100 according to the embodiments, each sub-pixel SP basically includes an organic light emitting diode OLED, a driving transistor 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 the driving transistor DRT; And a storage capacitor (Cst) that holds the corresponding voltage for one frame time.

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.

In the case of the OLED display 100 according to the embodiments, as the driving time of each sub-pixel SP becomes long, deterioration of circuit elements such as 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 .

The organic light emitting diode display 100 according to the 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 a characteristic value for a subpixel in this specification 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, DRT), and organic light emitting diode (OLED)).

In this specification, the compensation of the characteristic value for the subpixel means that the characteristic value or the characteristic value change of the circuit element (drive transistor DRT, organic light emitting diode (OLED)) in the subpixel is changed to a predetermined level, The transistor DRT, and the organic light emitting diode OLED) may be reduced or eliminated.

The organic light emitting diode display 100 according to the embodiments may include a compensation circuit including a sensing and compensation structure and a subpixel structure suitable for providing a sensing function and a compensation function.

As shown in FIG. 2, each sub-pixel disposed in the organic light emitting display panel 110 may further include a second transistor T2 to provide a sensing function and a compensation function.

2, the second transistor T2 is electrically connected between a 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.

By further including the second transistor T2 described above, the voltage state of the second node N2 of the driving transistor DRT in the sub-pixel SP can be effectively controlled.

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 .

Also, the second transistor T2 may be utilized as one of the voltage sensing paths for the second node N2 of the driving transistor DRT.

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

In some cases, the scan signal SCAN and the sense signal SENSE may be the same gate signal. In this case, the scan signal SCAN and the sense signal SENSE may be commonly applied to the gate node of the first transistor T1 and the gate node of the second transistor T2 through the same gate line.

3 is an exemplary diagram of a compensation circuit of the organic light emitting diode display 100 according to the embodiments.

Referring to FIG. 3, the OLED display 100 includes at least one sensing unit 310 for sensing and outputting sensing data through voltage sensing to obtain characteristic values of subpixels, A compensation unit 320 for performing a compensation process for compensating a characteristic value of a subpixel based on the characteristic value of the subpixel using the data and a memory unit for storing the compensation data calculated by the compensation unit 320, (330), and the like.

For example, the at least one sensing unit 310 may include an analog to digital converter (ADC). The sensing data output from the sensing unit 310 may be, for example, a Low Voltage Differential Signaling (LVDS) data format.

The at least one sensing unit 310 may be included in each source driver integrated circuit (SDIC) included in the data driver 120 and may be included outside the source driver integrated circuit (SDIC) .

The compensation unit 320 may be included in the controller 140 and may be provided outside the controller 140, as the case may be. The compensation unit 320 may be referred to as a compensation processor.

The memory unit 330 may store sensing data applied from the sensing unit 310 or compensation data calculated by the compensating unit 320. [ The memory unit 330 may be disposed on the display panel 110 before an off-sequence such as power-off occurs when a power off signal of the OLED display 100 is generated. Sense characteristic values of the driving transistors DRT in each sub-pixel, and store the sensing data or the calculated compensation data. The computed compensation data can be subsequently used in driving the organic light emitting display 100. [

Here, the memory unit 330 may be a non-volatile memory.

The memory unit 330 may be included outside the controller 140 and may be included in the controller 140 in some cases. The memory unit 330 may also be included inside or outside the source driver integrated circuit (SDIC).

3, the OLED display 100 according to the exemplary embodiment includes an initialization switch SPRE for controlling whether a reference voltage Vref is applied to a reference voltage line RVL, And a sampling switch (SAM) for controlling whether the RVL and the sensing unit 310 are connected to each other.

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 sensing unit (310).

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 sensing unit 310 can sense the voltage of the connected reference voltage line RVL.

If the sensing unit 310 senses the voltage of the reference voltage line RVL and the second transistor T2 is turned on and the resistance component of the driving transistor DRT can be ignored, ) May correspond to the voltage of the second node N2 of the driving transistor DRT. The voltage sensed by the sensing unit 310 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 sensing unit 310 may be the voltage charged in the line capacitor on the reference voltage line RVL. Here, the reference voltage line RVL is also referred to as a sensing line.

For example, the voltage sensed by the sensing unit 310 may be a voltage value (Vdata-Vth or Vdata-? Vth, including Vthata or Vthata) of the driving transistor DRT, Is a data voltage for sensing driving), or a voltage value for sensing the mobility of the driving transistor DRT.

On the other hand, the reference voltage lines RVL may be arranged one for each sub-pixel column, or one for each of two or more sub-pixel columns.

For example, when one pixel is composed of four subpixels (red subpixel, white subpixel, green subpixel, and blue subpixel), the reference voltage line RVL is divided into four subpixel columns , A white subpixel column, a green subpixel column, and a blue subpixel column).

In the following, the threshold voltage sensing drive and the mobility sensing drive for the driving transistor DRT will be briefly described.

4 is a diagram for explaining a threshold voltage sensing driving method for the driving transistor DRT of the OLED display 100 according to the embodiments.

The threshold voltage sensing drive for the driving transistor DRT may proceed to a sensing process including an initialization step, a tracking step and a sampling step.

The initializing step is a step of initializing the first node N1 and the second node N2 of the driving transistor DRT.

In this initialization step, the first transistor T1 and the second transistor T2 are turned on, and the initialization switch SPRE is turned on.

Thus, the first node N1 and the second node N2 of the driving transistor DRT are initialized to the threshold voltage sensing driving data voltage Vdata and the reference voltage Vref (V1 = Vdata, V2 = Vref).

The tracking step is performed until the voltage V2 of the second node N2 of the driving transistor DRT is turned on until the voltage of the second node N2 of the driving transistor DRT becomes a threshold voltage or a voltage state reflecting the change, .

That is, the tracking step is a step of tracking the voltage of the second node N2 of the driving transistor DRT which can reflect the threshold voltage or the change.

In this tracking step, the initialization switch SPRE is turned off or the second transistor T2 is turned off, and the second node N2 of the driving transistor DRT is floated.

As a result, the voltage V2 of the second node N2 of the driving transistor DRT rises.

The voltage V2 of the second node N2 of the driving transistor DRT rises and the rising width gradually decreases and becomes saturated.

The saturated voltage of the second node N2 of the driving transistor DRT may correspond to the difference between the data voltage Vdata and the threshold voltage Vth or the difference between the data voltage Vdata and the threshold voltage deviation Vth .

When the voltage V2 of the second node N2 of the driving transistor DRT becomes saturated, the sampling step can proceed.

The sampling step is a step of measuring a threshold voltage of the driving transistor DRT or a voltage reflecting the variation thereof so that the sensing unit 310 senses the voltage of the reference voltage line RVL, And sensing the voltage of the node N2.

In this sampling step, the sampling switch SAM is turned on so that the sensing unit 310 is connected to the reference voltage line RVL and supplies the voltage of the reference voltage line RVL, that is, And senses the voltage V2 of the second node N2.

The voltage Vsen sensed by the sensing unit 310 is a voltage Vdata-Vth obtained by subtracting the threshold voltage Vth from the data voltage Vdata or a voltage Vdata-Vth obtained by subtracting the threshold voltage deviation Vth from the data voltage Vdata Vdata -? Vth). Here, Vth may be a positive threshold voltage or a negative threshold voltage.

5 is a view for explaining a mobility sensing driving method for the driving transistor DRT of the OLED display 100 according to the embodiments.

The mobility sensing drive for the driving transistor DRT may proceed to a sensing process including an initialization step, a tracking step and a sampling step.

The initializing step is a step of initializing the first node N1 and the second node N2 of the driving transistor DRT.

In this initialization step, the first transistor T1 and the second transistor T2 are turned on, and the initialization switch SPRE is turned on.

Accordingly, the first node N1 and the second node N2 of the driving transistor DRT are initialized to the mobility sensing driving data voltage Vdata and the reference voltage Vref, respectively (V1 = Vdata, V2 = Vref).

The tracking step is performed until the voltage V2 of the second node N2 of the driving transistor DRT reaches the voltage V2 until the voltage of the second node N2 of the driving transistor DRT becomes the voltage state reflecting the mobility or the change thereof. .

That is, the tracking step is a step of tracking the voltage of the second node N2 of the driving transistor DRT which can reflect the mobility or the change.

In this tracking step, the initialization switch SPRE is turned off or the second transistor T2 is turned off, so that the second node N2 of the driving transistor DRT is floated. At this time, the first transistor T1 is turned off, and the first node N1 of the driving transistor DRT can also be floated together.

As a result, the voltage V2 of the second node N2 of the driving transistor DRT starts to rise.

The rising speed of the voltage V2 of the second node N2 of the driving transistor DRT depends on the current capability (i.e., mobility) of the driving transistor DRT.

The voltage V2 of the second node N2 of the driving transistor DRT increases more sharply as the driving transistor DRT having a higher current capability (mobility) is.

The sampling step may proceed after the tracking step has progressed for a predetermined time period DELTA t, that is, after the voltage V2 of the second node N2 of the driving transistor DRT has risen for a predetermined constant time DELTA t.

During the tracking step, the rising speed of the voltage V2 of the second node N2 of the driving transistor DRT corresponds to the voltage variation? V for a predetermined time? T.

In the sampling step, the sampling switch SAM is turned on, and the sensing unit 310 and the reference voltage line RVL are electrically connected.

Accordingly, the sensing unit 310 senses the voltage of the reference voltage line RVL, that is, the voltage V2 of the second node N2 of the driving transistor DRT.

The voltage Vsen sensed by the sensing unit 310 is a voltage that is increased by the voltage change amount? V for a predetermined time? T from the initialization voltage Vref and is a voltage corresponding to the mobility.

4 and 5, the sensing unit 310 converts the sensed voltage Vsen to a digital value for threshold voltage sensing or mobility sensing according to the threshold voltage or mobility sensing driving as described above, And generates and outputs sensing data including a digital value (sensing value).

The sensing data output from the sensing unit 310 may be provided to the compensating unit 320. In some cases, the sensing data may be provided to the compensation unit 320 through the memory unit 330.

The compensation unit 320 compares the characteristic value (e.g., threshold voltage, mobility) of the driving transistor DRT in the corresponding subpixel or the characteristic value change of the driving transistor DRT Voltage change, and mobility change), and perform characteristic value compensation process.

Here, the change in the characteristic value of the driving transistor DRT means that the current sensing data is changed based on the previous sensing data, or the current sensing data is changed based on the initial compensation data.

Therefore, when comparing the characteristic value or the characteristic value change between the driving transistors DRT, it is possible to grasp the characteristic value deviation between the driving transistors DRT. The characteristic value deviation (i.e., sub-pixel luminance deviation) between the driving transistors DRT from the characteristic value change of the driving transistor DRT when the characteristic value change of the driving transistor DRT indicates that the current sensing data is changed based on the initial compensation data, .

Here, the initial compensation data may be initial setting data set and stored at the time of manufacturing the OLED display.

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

The threshold voltage compensation process calculates compensation data for compensating a threshold voltage or a threshold voltage deviation (threshold voltage change), stores the calculated compensation data in the memory unit 330, or stores the corresponding video data Data ). ≪ / RTI >

The mobility compensation process calculates compensation data for compensating mobility or mobility deviation (mobility change), stores the calculated compensation data in the memory unit 330, or stores the corresponding video data Data ). ≪ / RTI >

The compensation unit 320 may change the image data Data through the threshold voltage compensation process or the mobility compensation process and supply the changed data to the corresponding source driver integrated circuit (SDIC) in the data driver 120. [

Accordingly, the source driver integrated circuit (SDIC) converts the data changed by the compensating unit 320 into a data voltage through a digital-to-analog converter (DAC) and supplies the data voltage to the corresponding subpixel, Compensation (threshold voltage compensation, mobility compensation) is actually performed.

By compensating for the subpixel characteristic value, luminance deviation between the subpixels is reduced or prevented, thereby improving the image quality.

In this case, when one reference voltage line RVL is arranged for each subpixel column, the sensing unit 310 applies a scan signal SCAN to each of the plurality of pixels on the gate line GL driven by the scan signal SCAN, And senses the voltage V2 of the second node N2 of the driving transistor DRT.

For example, when one pixel is composed of four subpixels (a red subpixel, a white subpixel, a green subpixel, and a blue subpixel), the sensing unit 310 may include a gate line The voltage V2 of the second node N2 of the driving transistors DRT of the plurality of red subpixels may be received and sensed through the reference voltage line RVL in the order specified on the reference voltage line GL. Then, the voltage V2 of the second node N2 of the driving transistor DRT of the white subpixel, the green subpixel, and the blue subpixel may be sequentially applied through the reference voltage line RVL.

However, if four reference voltage lines RVL are arranged for each subpixel column corresponding to the number of subpixels constituting each pixel, the sensing unit 310 may sense the gate line GL driven by the scan signal SCAN, It is possible to sense the voltage V2 of the second node N2 of the driving transistor DRT for all the subpixels of the driving transistor DRT at a time.

In other words, the sensing unit 310 may sense one gate line GL driven by the scan signal SCAN according to the number of subpixels constituting one pixel and the number of the corresponding reference voltage lines RVL. A plurality of times of sensing can be performed on the gate line GL. Therefore, the compensation unit 320 for receiving the sensing data from the sensing unit 310 and calculating the compensation data can also calculate the multiple times compensation data for one gate line GL.

6 is a diagram showing sensing timing of the OLED display 100 according to the embodiments.

Referring to FIG. 6, the organic light emitting diode display 100 according to the exemplary embodiment of the present invention can display a characteristic value of a driving transistor DRT in each sub-pixel disposed in the display panel 110 when a power- Can be sensed. This sensing process is referred to as an " on-sensing process ".

When a power off signal is generated, before the off-sequence such as power-off occurs, the characteristic value of the driving transistor DRT in each sub-pixel arranged on the display panel 110 . This sensing process is referred to as an " off-sensing process ".

It is also possible to sense the characteristic value of the driving transistor DRT in each sub-pixel disposed on the display panel 110 at every blank time during the display driving until a power-off signal is generated after the power-on signal is generated. This sensing process is referred to as a " real-time sensing process ".

This real-time sensing process may be performed for each blank time between active times based on the vertical synchronization signal Vsync.

Since the mobility sensing of the driving transistor DRT is required only for a short time, it may be performed before the display driving starts after the power-on signal is generated, or when the display driving can not be performed after the power- .

In addition, the mobility sensing of the driving transistor DRT can be performed in real time using a short blank time even during the display driving.

That is, the mobility sensing of the driving transistor DRT may proceed to an on-sensing process before the display driving starts by generating a power-on signal, and a power-off signal is generated and the display driving is progressed (Off-Sensing Process) during the non-display period, and may proceed to the Real-time Sensing Process every short blank time during the display driving.

In contrast, since the threshold voltage sensing (Vth Sensing) of the driving transistor DRT requires the long voltage saturation time Vsat of the second node N2 of the driving transistor DRT, It takes a relatively long time compared to the mobility sensing.

In consideration of this point, the threshold voltage sensing of the driving transistor DRT must be performed utilizing a timing that does not disturb the user's viewing.

Therefore, in general, the threshold voltage sensing of the driving transistor DRT can be performed while the display is not driven, that is, in a state where the user does not intend to watch, after a power off signal occurs according to user input or the like .

However, as occasion demands, the threshold voltage sensing of the driving transistor DRT may also proceed to an on-sensing process or a real-time sensing process.

7 is a view illustrating an embodiment of an organic light emitting display according to embodiments of the present invention.

Referring to FIG. 7, each gate driver IC (GDIC) of the gate driver 130 may be mounted on a film GF connected to the display panel 110 when implemented in a chip-on-film (COF) have.

On the other hand, each source driver IC (SDIC) of the data driver 120 may be mounted on a film SF connected to the display panel 110 when implemented in a chip-on-film (COF) method.

The display device 100 includes at least one source printed circuit board (SPCB) for controlling the connection between the SDIC and other devices, And a control printed circuit board (CPCB) for mounting the devices.

The film (SF, or substrate) on which the source driver integrated circuit (SDIC) is mounted is electrically connected to the display panel 110 on one side and electrically connected to the source printed circuit board (SPCB) on the other side.

A controller 140 can be mounted on the control printed circuit board (CPCB).

Although not shown, various voltages or currents are supplied to the control printed circuit board (CPCB) to supply or supply various voltages or currents to the display panel 110, the gate driver IC (GDIC) and the source driver IC (SDIC) And a power management IC (PMIC) for controlling the power supply.

The at least one source printed circuit board (SPCB) and the control printed circuit board (CPCB) may be circuitly connected via at least one connection member.

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

At least one source printed circuit board (SPCB) and a control printed circuit board (CPCB) may be integrated into one printed circuit board.

The OLED display 100 according to an embodiment of the present invention further includes a temperature and humidity measurement unit including at least one temperature sensor TS and at least one humidity sensor HS.

At least one temperature sensor (TS) and at least one humidity sensor (HS) measure temperature and humidity, respectively, to obtain temperature information and humidity information.

The at least one temperature sensor TS and the at least one humidity sensor HS may be disposed at predetermined positions on the display panel 110 and may be distributed on the display panel 110 .

Particularly, in the present invention, at least one temperature sensor TS and at least one humidity sensor HS are provided on one side to which a film (SF, or substrate) on which a source driver IC (SDIC) mounted on a display panel 110 is connected .

This is because there is a high possibility that vapor permeability occurs at a position where the display panel 110 and the film (SF, or substrate) on which the source driver integrated circuit (SDIC) is mounted are electrically connected.

However, the present invention is not limited thereto, and at least one temperature sensor TS and at least one humidity sensor HS may be disposed at various positions on the display panel 110. [

Also, in some cases, at least one temperature sensor TS and at least one humidity sensor HS of the temperature / humidity measuring section may be disposed on the source driver integrated circuit (SDIC) or the film SF.

The temperature information and the humidity information acquired by the temperature and humidity measuring unit are transmitted to the controller 140.

The controller 140 determines whether the driving environment of the organic light emitting diode display 100 is a cohesive environment in which the moisture permeable to moisture is cohered according to the temperature information and the humidity information transmitted from the temperature / humidity measuring unit.

In the present invention, the controller 140 can control the sensing unit 310 not to measure the sensing voltage in the case of a cohesive environment in which the moisture-permeable moisture can cohere.

That is, characteristic value compensation for the subpixel may not be performed. A detailed description thereof will be described later.

8 and 9 are views schematically showing a connection structure between a display panel and a data driver according to embodiments of the present invention. FIG. 10 is a cross-sectional view illustrating a pad region and a bonding region of a display panel according to embodiments of the present invention. Fig.

Referring to FIGS. 8 and 9, a display device 100 according to embodiments of the present invention includes a display panel 110 and a data driver 120 connected to the display panel 110. Here, the data driver 120 includes a source driver IC (SDIC) and a film (SF) on which a source driver IC (SDIC) is mounted.

The display panel 110 has a pad region 810 on at least one side thereof. In addition, a plurality of panel pads may be disposed in the pad region 810.

The data driver 120 has a bonding area 820 on at least one side thereof. A plurality of circuit pads may be disposed in the bonding region 820.

The display panel 110 and the data driver 120 may be bonded to each other. In detail, a plurality of panel pads provided in the pad region 810 of the display panel 110 and a plurality of circuit pads provided in the bonding region 820 of the data driver 120 may be connected.

Accordingly, the data driver 120 can transmit a signal to the display panel 110.

8, the data driver 120 may be bonded to the upper portion of the display panel 110 and may extend to correspond to the upper surface of the display panel 110. Referring to FIG. Here, the source driver integrated circuit (SDIC) may be mounted on the lower portion of the film SF.

9, the data driver 120 is bonded to the upper portion of the display panel 110, and the display panel 110 is connected to the display panel 110, And may extend in a downward direction. Here, the source driver integrated circuit (SDIC) can be mounted on the film SF.

As described above, the display device 100 according to the embodiments of the present invention can be arranged as shown in FIGS. 8 and 9 by bonding the data driver 120 to the display panel 110.

10, the display panel 110 includes an active area (A / A) in which a plurality of subpixels defined by a plurality of data lines DL and a plurality of gate lines GL are arranged, And a non-active area (N / A) which is an outer area of the display area A / A.

A reference voltage line RVL may be disposed between the plurality of data lines DL in the display area A / A.

For example, one reference voltage line RVL may be disposed between the four data lines DL.

A pad region 810 is provided in the non-display region N / A and a first panel pad 1010 and a second panel pad 1020 are disposed in the pad region 810. The second panel pad 1020 may be disposed between the first panel pads 1010.

The plurality of data lines DL arranged in the display area A / A are electrically connected to the first panel pad 1010, respectively.

Specifically, each of the plurality of data lines DL may extend to the non-display area N / A or may be connected to a plurality of first data lines DL through the corresponding plurality of data link lines DLLK arranged in the non-display area N / And may be connected to the panel pad 1010.

Here, it is assumed that a plurality of data lines DL are electrically connected to a plurality of first panel pads 1010 through a plurality of data link lines (DLLK).

A plurality of reference voltage lines RVL arranged in the display area A / A extend to the non-display area N / A or a reference voltage link line RVLK (Not shown).

A plurality of circuit pads 1030 and 1040 are disposed in a bonding region 820 of the data driver 120. [ The plurality of circuit pads 1030 and 1040 includes a first circuit pad 1030 and a second circuit pad 1040.

The first panel pad 1010 is connected to the first circuit pad 1030 and the second panel pad 1020 is connected to the second circuit pad 1040 when the display panel 110 and the data driver 120 are bonded. .

That is, the first panel pad 1010 and the data line DL1 are connected to the first circuit pad 1010 so that the data voltage is supplied to the plurality of data lines DL through the source driver integrated circuit (SDIC) The data line DL may be driven.

 The second panel pad 1020 and the reference voltage line RVL may be coupled to the second circuit pad 1040 to receive or transmit signals to the source driver integrated circuit (SDIC).

On the other hand, the source driver integrated circuit (SDIC) may include a sensing portion including an analog-to-digital converter.

10, the first panel pad 1010 and the second panel pad 1020 are distinguished from each other according to the connected lines, and the first circuit pad 1030 and the second circuit pad 1040 are distinguished from each other. The first panel pad 1010 and the second panel pad 1020 may be different from each other and the first circuit pad 1030 and the second circuit pad 1040 may be different from each other.

However, the first panel pad 1010, the second panel pad 1020, the first circuit pad 1030 and the second circuit pad 1040 may be implemented in the same manner.

In the bonding process of bonding the display panel 110 and the data driver 120, which are separately manufactured, to each other in the manufacturing process of the organic light emitting diode display device 100, there is a high possibility of moisture permeation.

The gate driver 130 may also be bonded to the display panel 110. The gate driver 130 may provide a scan signal SCAN that simply switches between a high level and a low level, The impact is not significant.

In contrast, in the case of the data driver 120 that supplies the data voltage Vdata for driving a plurality of subpixels SP, the influence of the moisture permeation may be relatively large.

In particular, the reference voltage line RVL is a line for sensing the characteristic value of the sub-pixel SP connected to the plurality of data lines DL. The reference voltage line RVL is a line for sensing the characteristic value of the sub- When the sensing operation is performed in a state where the sensor is in a state of being turned on, an electrolytic corrosion or a short circuit may occur.

Such erroneous or overcorrection may cause line defects or block defects in the display device, and thus should be avoided.

However, in reality, it is difficult to completely prevent breathing. 7, the temperature information and the humidity information are acquired, including the temperature and humidity measurement unit, and the controller 140 performs sensing operation according to the obtained temperature information and the cohesion environment determined from the humidity information Thereby preventing an error compensation and an over compensation from occurring due to the moisture permeation.

At this time, the controller 140 according to the present invention can perform the real-time sensing process in the same manner as the conventional one, but not perform the off-sensing process.

As described above, in the case of the real-time sensing process, since the mobility sensing for the sub-pixels SL arranged on the predetermined number of gate lines GL in one blank time is performed, Line RVL is used.

Therefore, it is unlikely that election will occur.

On the other hand, in the case of the off-sensing process, not only the threshold voltage sensing requiring a relatively longer sensing time than the mobility sensing but also sensing is performed on all the sub-pixels SP on the display panel 110, The reference voltage line (RVL) is used for a very long time, and the possibility of electric discharge is high.

Accordingly, the controller 140 can control the sensing unit 310 and the compensating unit 320 to perform a real-time sensing process, but not an off-sensing process, when the controller 140 determines that the environment is a cohesive environment.

However, when the off-sensing process is not performed, the threshold voltage compensation for the sub-pixel SP is not performed. However, since the coherent environment is an environmental factor generated by temperature and humidity, there is no possibility that the coherent environment will again occur when the organic light emitting diode display 100 is driven and turned off.

Accordingly, the controller 140 can normally perform the off-sensing process in a state where no coherent environment is generated.

11 is a graph illustrating a wet bulb temperature for determining an agglomerating environment according to embodiments of the present invention.

Wet-bulb temperature means the temperature of the air that has been adiabatically cooled until it reaches 100% humidity and then condensed at atmospheric pressure prior to cooling. That is, the wet bulb temperature indicates the relationship between temperature and humidity for the coagulating environment in which moisture can flocculate.

As shown in Fig. 11, the wet bulb temperature defining the coagulation environment may vary depending on temperature and humidity.

In FIG. 11, the upper and left regions of the curve representing the wet bulb temperature can be regarded as corresponding to the cohesive environment, and the region marked separately on the lower side corresponds to the sensing environment capable of sensing.

In Fig. 11, the area between the curve of the wet bulb temperature and the sensing environmental area is the margin area.

In FIG. 11, the wet bulb temperature defining the cohesion environment is shown graphically for the sake of convenience. However, the OLED display 100 of the present invention can display the wet bulb temperature information in the form of a look-up table As shown in FIG.

The LUT may be stored in a memory device separately provided in the OLED display 100 and may be stored in the controller 140. [

12 is a view illustrating an embodiment of an OLED display according to another embodiment of the present invention.

7, only one temperature sensor TS and one humidity sensor HS are arranged in FIG. 7, but in FIG. 12, a plurality of temperature sensors TS and A plurality of humidity sensors (HS) are arranged.

12, a plurality of temperature sensors TS and a plurality of humidity sensors HS are connected to a plurality of films (SFs or substrates) to which a source driver integrated circuit (SDIC) mounted on a display panel 110 is mounted And are disposed adjacent to each of the bonding regions 820.

A temperature sensor TS and a humidity sensor HS are disposed at positions where the display panel 110 and the plurality of films SF are connected to each other.

Accordingly, the controller 140 can obtain the temperature information and the humidity information for each of the positions where the plurality of films SF are connected separately.

The controller 140 may divide the display panel 110 into a plurality of regions according to the acquired temperature information and humidity information, and determine whether to perform sensing for each of the divided regions.

13 is a diagram for explaining a sensing area and a non-sensing area according to embodiments of the present invention.

13, when the organic light emitting diode display 100 includes a plurality of source driver integrated circuits (SDIC), a plurality of source driver integrated circuits (SDIC) .

Each of the plurality of source driver ICs (SDIC) may drive a plurality of data lines (DL) included in corresponding areas in the display panel 110.

In recent years, the number of source driver integrated circuits (SDIC) included in organic light emitting display devices has been increasing as organic light emitting display devices have become larger and higher in resolution.

In a large-sized organic light emitting display device, temperature and humidity may be different depending on each position.

Also, as the driving time of the organic light emitting display increases, the temperature of the organic light emitting display also increases due to heat generation. Such a temperature rise is different according to the displayed image, The aggregation environment is not often generated in the region.

Therefore, it is not desirable to perform compensation for all the subpixels on the display panel 110 due to the occurrence of a cohesive environment at a specific position.

In the organic light emitting display 100 shown in FIG. 12 and FIG. 13, the controller 140 controls the temperature and the temperature of each of the plurality of independently driven source driver integrated circuits (SDIC) Humidity, and sets the remaining area excluding the position where the coagulating environment is generated to be the sensing area (SA), so that the sensing driving can be performed.

And the non-sensing area NSA in which no sensing is performed does not perform sensing driving.

If sensing is performed only for the sensing area SA to compensate for the non-sensing area NSA and then compensation is not performed for the sensing area NSA, the sensing area SA and the non- (NSA) may result in differences in the images being displayed.

In order to minimize such a problem, the controller 140 uses the compensation data for the sensing area SA adjacent to the non-sensing area NSA in the sensing area SA, And may perform compensation for the pixel SP.

As a result, it is possible to prevent the occurrence of the electromagnetism by not performing the sensing drive for the area in which the cohesion environment is generated, and perform the compensation using the compensation data in the adjacent area, .

FIG. 14 illustrates a method of driving an organic light emitting display according to embodiments of the present invention.

Referring to FIG. 14, the organic light emitting display device is driven (S1110). Then, the controller 140 determines whether a power off command is received (S1115).

If at least one temperature sensor (TS) and at least one humidity sensor (HS) of the temperature and humidity measuring unit measure temperature and humidity under the control of the controller (140) Information is acquired (S1120).

The controller 140 receives the temperature information and the humidity information obtained from the temperature / humidity measuring unit, and determines whether or not the cohesion environment exists by referring to the LUT regarding the previously stored wetness temperature (S1125).

If it is determined that it is not a cohesive environment, the controller 140 performs an off-sensing process to acquire compensation data for a plurality of sub-pixels SP (S1130).

However, if it is determined that the environment is a cohesive environment, the controller 140 confirms the driving time until the power-off command is received after the OLED display 140 is powered on (S1135).

Then, it is determined whether the determined driving time is less than a preset reference time (S1140).

If it is determined that the driving time is less than or equal to the reference time (for example, one hour), the controller 140 does not perform the off-sensing process and turns off the OLED display 100.

This is because, when the driving time is short, it can be considered that the characteristic change of the subpixel due to the driving of the organic light emitting display 100 is not large.

In particular, in the case of an off-sensing process, since it is performed at power-off, substantially after that, the compensation data is obtained in order to perform the compensation in case of power-on again, State.

Therefore, in the case where the driving time is short, the problem of image quality does not occur largely even if the off-sensing process is not performed.

In addition, since the possibility of continuous occurrence of the cohesive environment is not large, the characteristic change of the uncompensated subpixel can be compensated again by performing the off-sensing process at the next power-off time.

However, if it is determined that the driving time exceeds the reference time, the controller 140 determines temperature information and humidity information for each position on the display panel 110 (S1145).

12 and 13, the temperature and humidity measuring unit may include a plurality of temperature sensors TS and a plurality of humidity sensors HS, and may include a plurality of temperature sensors TS and a plurality of humidity sensors HS, May be disposed adjacent to each of a plurality of bonding regions 820 to which a plurality of films (SF, or substrates) mounted with a source driver integrated circuit (SDIC) are connected.

Accordingly, the controller 140 can distinguish the cohesion environment for each position according to temperature information and humidity information obtained from the plurality of temperature sensors TS and the plurality of humidity sensors HS.

The controller 140 can distinguish the non-sensing area NSA where the cohesion environment is generated and the sensing area SA where the cohesion environment is not generated in the display panel 110 and determines whether or not a sensing area, (S1150).

If it is determined that the sensing area exists, the controller 140 performs an off-sensing process on the determined sensing area SA to perform selective compensation (S1155)

For the non-sensing area NSA in which the off-sensing process is not performed, compensation can be performed using the compensation data obtained in the adjacent sensing area SA.

Therefore, the driving method of the organic light emitting diode display according to the embodiments of the present invention can prevent the sensing operation from being performed depending on the cohesive environment, or the sensing operation to only a part of the sensing area, It is possible to prevent line defects or block defects from occurring due to compensation or over-compensation.

14, it is assumed that the controller 140 determines whether or not the off-sensing process is performed according to whether or not the coherent environment exists. However, in the present invention, the controller 140 determines whether or not the coherent environment , And may decide whether to perform.

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: Timing controller

Claims (10)

A display panel in which a plurality of gate lines, a plurality of data lines, a plurality of sensing lines, and a plurality of subpixels are arranged;
A temperature and humidity measurement unit for obtaining temperature information and humidity information of the display panel;
At least one sensing unit measuring a sensing voltage from the plurality of sensing lines and outputting sensing data for at least one of the plurality of subpixels; And
And a compensation unit for receiving the sensing data and calculating compensation data for the at least one subpixel,
The controller comprising:
Wherein the sensing unit discriminates the cohesion environment according to the temperature information and the humidity information measured by the temperature and humidity measurement unit and controls the sensing unit to measure the sensing voltage when the cohesion is not in the cohesion environment. The method according to claim 1,
The controller comprising:
Information on wet bulb temperature according to temperature and humidity is stored in advance in the form of a look-up table (LUT)
And the wet bulb temperature corresponding to the temperature information and the humidity information is identified in the look-up table to determine the coagulation environment. The method according to claim 1,
The controller comprising:
The organic light emitting display device may determine the driving time after the organic light emitting display device is powered on,
And controls the sensing unit not to measure the sensing voltage if the determined driving time is less than a predetermined reference time. The method of claim 3,
The temperature /
A plurality of temperature sensors and a plurality of humidity sensors dispersedly disposed at predetermined positions on the display panel,
The controller comprising:
When the drive time exceeds a predetermined reference time, the temperature information and humidity information obtained from the plurality of temperature sensors and the plurality of humidity sensors are analyzed to determine a coagulation environment zone where the coagulation environment occurred on the display panel ,
And controls the sensing unit to measure the sensing voltage with respect to a sensing area excluding the coagulated area on the display panel. 5. The method of claim 4,
The controller comprising:
And compute compensation data for at least one subpixel included in the coherent environment zone according to the compensation data obtained in the sensing zone adjacent to the coherent environment zone. 6. The method of claim 5,
The controller comprising:
Wherein the control unit determines the cohesion environment and controls the sensing unit in an off-sensing process for calculating compensation data for the at least one sub-pixel after the power-off command is received. The method according to claim 1,
The organic light emitting display device
A gate driver for driving the plurality of gate lines; And
And a data driver for driving the plurality of data lines,
The temperature /
And at least one temperature sensor and at least one humidity sensor disposed on one side of the display panel to which the data driver is connected. 8. The method of claim 7,
The data driver may include:
And a plurality of source driver integrated circuits for driving at least one data line disposed in a corresponding one of the plurality of data lines on the display panel,
Wherein the at least one sensing unit comprises:
A sense voltage is measured from at least one sensing line disposed in each of the plurality of source driver integrated circuits and arranged in a data driving zone in which the corresponding source driver integrated circuit is driven,
The temperature /
And a plurality of temperature sensors and a plurality of humidity sensors arranged adjacent to each of a plurality of pad portions electrically connecting the plurality of source driver integrated circuits in the display panel. A method of driving an organic light emitting display including a display panel having a plurality of gate lines, a plurality of data lines, a plurality of sensing lines and a plurality of sub pixels, a temperature and humidity measuring unit, at least one sensing unit,
Obtaining temperature information and humidity information of the display panel;
Determining a coagulation environment according to the temperature information and the humidity information;
Measuring a sensing voltage from the plurality of sensing lines and outputting sensing data for at least one of the plurality of subpixels, if it is not the cohesive environment; And
And receiving the sensing data to compute compensation data for the at least one subpixel. 10. The method of claim 9,
Wherein the step of outputting the sensing data comprises:
Determining whether the organic light emitting display device is powered on;
If the sensed driving time is less than a predetermined reference time, the sensing unit does not measure the sensing voltage;
Determining a coagulation environment zone where the coagulation environment occurred on the display panel according to the temperature information and the humidity information when the driving time exceeds the reference time; And
Further comprising the step of measuring the sensing voltage with respect to a sensing area excluding the coagulated area on the display panel.

Images