KR20180030342A - Compensation application processor, display apparatus having the compensation application processor and method of driving the display apparatus - Google Patents

Abstract

A compensation application processor comprises: a pixel age calculation part calculating pixel age corresponding to a cumulative lifetime of a pixel; a first storage part storing information on a modeling characteristic-age curve indicating characteristic deterioration in accordance with a driving time of a previously modeled reference pixel; a first compensation part receiving sensing characteristic data obtained by sensing a characteristic of a pixel in a sensing mode, determining prediction characteristic data corresponding to the pixel age using the calculated pixel age and modeling characteristic-age curve, and generating first compensation data using raw characteristic data calculated from the sensing characteristic data and the prediction characteristic data; a second storage part storing the first compensation data; and a second compensation part using pixel age and a modeling characteristic-age curve, which are calculated based on image data of a pixel received in a display mode, to determine prediction characteristic data corresponding to the pixel age and generating second compensation data using the first compensation data and the prediction characteristic data.

Description

TECHNICAL FIELD [0001] The present invention relates to a compensation application processor, a display device including the compensation application processor, and a driving method of the display device. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a compensation application processor, a display device including the compensation application processor, and a driving method of the display device, and more particularly, to a compensation application processor for improving display quality, a display device including the compensation application processor, .

The organic light emitting display can display an image using an organic light emitting diode. The characteristics of the organic light emitting diode and the driving transistor for supplying current to the organic light emitting diode may be deteriorated by use. The pixel of the organic light emitting display includes an organic light emitting diode and a driving transistor, and pixel deterioration by the organic light emitting diode and the driving transistor deteriorates display quality.

In order to compensate for such pixel deterioration, the image data of the pixel is corrected based on the sensing value obtained by sensing the deterioration of the pixel. However, in the display mode between the sensing mode and the next sensing mode, a sensing error for pixel deterioration that increases in real time occurs, and the sensing error generates a correction error of the image data. Therefore, the display quality of an image displayed on the organic light emitting display device is deteriorated.

It is an object of the present invention to provide a compensation application processor for real-time compensation of pixel deterioration.

Another object of the present invention is to provide a display device including the compensation application processor.

Another object of the present invention is to provide a method of driving the display device.

In order to achieve the above object, a compensation application processor according to an embodiment of the present invention includes a pixel age calculating unit for calculating a pixel age corresponding to a cumulative lifetime of a pixel, A first storage unit for storing information on a modeling characteristic-age curve, and sensing characteristic data obtained by sensing a characteristic of a pixel in a sensing mode, and calculating the pixel age using the calculated pixel age and the modeling characteristic- And a first compensation unit for determining corresponding prediction characteristic data and generating first compensation data using the raw characteristic data calculated from the sensing characteristic data and the prediction characteristic data.

In one embodiment, the compensation application processor may include a second storage unit for storing the first compensation data, and a second storage unit for storing the pixel age and the modeling characteristic-age curve calculated based on the image data of the pixels received in the display mode, And a second compensation unit that determines prediction characteristic data corresponding to the first compensation data and the second compensation data using the first compensation data and the prediction characteristic data.

In one embodiment, the second compensation unit may generate correction data for correcting the image data of the pixel based on the second compensation data.

In one embodiment, the first compensator calculates the primitive characteristic data of the pixel by subtracting the sensing reference data set in the sensing characteristic data, and the first compensated data is a difference between the primitive characteristic data and the predictive characteristic data Can respond.

In one embodiment, the second compensation data may correspond to a sum of the first compensation data and the prediction characteristic data.

According to an aspect of the present invention, there is provided a display device including a display panel including a plurality of pixels, a sensing unit outputting sensing characteristic data sensing characteristics of the pixels, a plurality of pixels corresponding to a cumulative lifetime of the pixels, A first storage unit for storing information of a modeling characteristic-age curve representing a characteristic deterioration according to the driving time of the base modeled reference pixel, a sensing unit for receiving the sensing characteristic data in a sensing mode, A first compensation unit for determining prediction characteristic data corresponding to the pixel age using the pixel age and the modeling characteristic-age curve, and generating first compensation data using the sensing characteristic data and the prediction characteristic data; Using the pixel age and the modeling characteristic-age curve calculated based on the image data of the pixel received in the display mode, Determining a prediction characteristic data corresponding to a predetermined age, and includes a second compensation unit that generates second compensation data by using the prediction data and the characteristics of the first compensation data.

In one embodiment, the display apparatus may further include a second storage unit for storing the first compensation data.

In one embodiment, the second compensation unit may correct the image data of the pixel based on the second compensation data and generate correction data of the pixel.

In one embodiment, the first compensator may calculate the raw characteristic data of the pixel by subtracting the sensing reference data set in the sensing characteristic data, and the first compensation data may include a difference between the raw characteristic data and the prediction characteristic data .

In one embodiment, the second compensation data may correspond to a sum of the first compensation data and the prediction characteristic data.

In one embodiment, the pixel may include an organic light emitting diode, a driving transistor coupled to the anode electrode of the organic light emitting diode, and a storage capacitor coupled to the gate electrode of the driving transistor.

In one embodiment, the characteristic of the pixel may be the threshold voltage of the driving transistor.

In one embodiment, the display device is powered off and can be driven in the sensing mode for a set period.

In order to accomplish the above object, a driving method of a display device according to an embodiment of the present invention includes: sensing sensing data obtained by sensing a characteristic of a pixel in a sensing mode; receiving a pixel age and a modeling characteristic- Determining first predictive characteristic data corresponding to the pixel age using the sensing characteristic data and the first predictive characteristic data, and generating first compensation data using the sensing characteristic data and the first predictive characteristic data, And determining second prediction characteristic data corresponding to the pixel age using the pixel age and the modeling characteristic-age curve, and the first compensation data and the second prediction characteristic And generating second compensation data using the data.

In one embodiment, the method may further comprise, in the display mode, correcting the image data based on the second compensation data.

In one embodiment, the method may further comprise, in the sensing mode, storing the first compensation data.

In one embodiment, the method further comprises, in the sensing mode, calculating raw characteristic data of the pixel by subtracting the sensing reference data set in the sensing characteristic data, wherein the first compensation data comprises the raw characteristic data And the difference of the first predictive characteristic data.

In one embodiment, the second compensation data may correspond to a sum of the first compensation data and the second prediction characteristic data.

In one embodiment, the characteristic of the pixel may be the threshold voltage of the driving transistor.

In one embodiment, the display device is powered off and can be driven in the sensing mode for a set period.

According to the embodiments of the present invention as described above, the image data is corrected using the second compensation data obtained by adding the prediction characteristic data according to the pixel age to the first compensation data generated in the sensing mode, The display quality can be improved.

1 is a block diagram of a display device according to an embodiment of the present invention.
2 is a circuit diagram of a pixel according to an embodiment of the present invention.
3 is a block diagram of a compensation application processor in accordance with an embodiment of the present invention.
FIG. 4 is a conceptual diagram for explaining the pixel age calculating unit of FIG. 3; FIG.
5 is a conceptual diagram for explaining a method of real-time compensation of pixel deterioration according to an embodiment of the present invention.
6 is a flowchart illustrating a method of real-time compensation of pixel deterioration according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a display device according to an embodiment of the present invention.

1, the display device includes a display panel 100, a control signal generator 200, a compensation application processor 300, a data driver 400, a scan driver 500, and a sensing unit 600 do.

The display panel 100 includes a plurality of pixels P. The plurality of pixels P may be arranged in a plurality of pixel rows and a plurality of pixel columns. Each pixel P may include an organic light emitting diode, a driving transistor for driving the organic light emitting diode, and a storage capacitor for storing a data voltage.

The control signal generator 200 drives the compensation application processor 300, the data driver 400, the scan driver 500, and the sensing unit 600 using a primitive control signal received from the outside And generates a plurality of control signals.

The compensation application processor 300 generates first compensation data for real-time compensation of the sensing characteristic data obtained by sensing characteristic deterioration of each pixel in the sensing mode, and adds the prediction characteristic data corresponding to the pixel age to the first compensation data And calculates the second compensation data. The compensation application processor 300 generates correction data in which the image data is corrected based on the second compensation data in the display mode after the sensing mode. The predictive characteristic data is data obtained by measuring the degree of deterioration of the characteristic of the reference pixel modeled according to the driving time.

For example, in the sensing mode, the compensation application processor 300 receives the sensing characteristic data Vth_S corresponding to the deterioration characteristic of the pixel from the sensing unit 600, and based on the sensing characteristic data Vth_S And the first compensation data Vth_C1 is calculated by applying the prediction characteristic data Vth_model_A corresponding to the pixel age to the raw characteristic data Vth_org corresponding to the original characteristic of the pixel .

In the display mode after the sensing mode, the compensation application processor 300 calculates the second compensation data Vth_C2 by applying the prediction characteristic data Vth_model_A corresponding to the pixel age to the first compensation data Vth_C1 . The compensation application processor 300 corrects the image data (DATA) in real time based on the second compensation data (Vth_C2) and outputs correction data (DATA_C).

The data driver 400 converts the correction data DATA_C provided from the compensation application processor 230 into an analog data voltage and outputs the data voltage to the display panel 100. The data driver 300 may output a data voltage corresponding to the correction data DATA_C to the pixel in the display mode and a sensing reference voltage for sensing the pixel deterioration in the sensing mode to the pixel.

 The scan driver 400 generates a plurality of scan signals and sequentially outputs the plurality of scan signals in order to sequentially drive the plurality of pixel rows along the scan direction. The scan driver 400 may sequentially output the plurality of scan signals in the display mode and the sensing mode. The pulse width of the scan signal in the display mode may be different from the pulse width of the scan signal in the sensing mode.

The sensing unit 600 receives a sensing signal corresponding to a characteristic of a pixel, for example, a threshold voltage, in the sensing mode, and converts the sensing signal into digital sensing data Vth_S. The sensing unit 600 provides the sensing characteristic data Vth_S to the compensation application processor 300.

The display device drives the display panel 100 in a sensing mode and a display mode.

The display device may be driven in the sensing mode for a set time when the display device is changed from a power-on state to a power-off state. In the sensing mode, the data driver 400 provides the sensing reference voltage Vref to the pixels P on a pixel row basis, and the scan driver 600 applies the sensing reference voltage Vref And provides a scan signal to the pixels P of the pixel row in synchronism with each other. The sensing unit 600 receives a sensing signal corresponding to a characteristic of a pixel included in a pixel row on a pixel row basis, converts the sensing signal into sensing characteristic data Vth_S, and outputs the sensing characteristic data Vth_S To the compensation application processor 300.

The display device may be driven in the display mode in the power-on state. In the display mode, the compensation application processor 300 generates the correction data DATA_C using compensation data obtained by real-time compensation of the sensing characteristic data Vth_S and the sensing characteristic data Vth_S. The data driver 400 converts the correction data DATA_C into a data voltage and provides the data voltage to the pixel P on a pixel row basis. The scan driver 600 provides a scan signal to a pixel P of a pixel row in synchronization with the data voltage output of the data driver 400.

2 is a circuit diagram of a pixel according to an embodiment of the present invention.

1 and 2, the pixel P may include an organic light emitting diode EL, a driving transistor TR_D, a switching transistor TR_SC, a storage capacitor C_ST, and a sensing transistor TR_SEN.

The organic light emitting diode EL may be connected between the first node N_A and the second power supply voltage ELVSS. The organic light emitting diode EL may emit light based on a driving current transmitted through the driving transistor TR_D.

The driving transistor TR_D may include a first electrode receiving the first power supply voltage ELVDD, a second electrode coupled to the first node N_A, and a gate electrode coupled to the second node N_G. have. The first node N_A may correspond to the anode electrode of the organic light emitting diode EL. The driving transistor TR_D may transmit a driving current to the organic light emitting diode EL in response to the second node voltage V_G of the second node N_G.

The switching transistor TR_SC may include a first electrode coupled to the data line DL, a second electrode coupled to the second node N_G, and a gate electrode receiving the display scan signal SCAN. The switching transistor TR_SC may provide a data voltage or sensing reference voltage applied to the data line DL to the second node N_G in response to the scan signal SCAN.

The storage capacitor C_ST may be connected between the first node N_A and the second node N_G. The storage capacitor C_ST may temporarily store a data voltage supplied through the switching transistor TR_SC.

The sensing transistor TR_SEN may include a first electrode coupled to the sensing line SL, a second electrode coupled to the first node N_A, and a gate electrode receiving the sensing scan signal SENSE . The sensing transistor TR_SEN applies the initialization voltage to the first node N_A or the node voltage V_A of the first node N_A to the sensing line SL in response to the sensing scan signal SENSE. can do. The node voltage V_A may include threshold voltage information of the driving transistor TR_D.

The sensing line SL is coupled to the sensing unit 600 and a sensing signal corresponding to a threshold voltage of the driving transistor TR_D is provided to the sensing unit 600.

Although not shown, the display scan signal and the sensing scan signal may be connected to the same scan line or may be connected to different scan lines, respectively.

3 is a block diagram of a compensation application processor in accordance with an embodiment of the present invention. FIG. 4 is a conceptual diagram for explaining the pixel age calculating unit of FIG. 3; FIG.

1 and 3, the compensation application processor 300 includes a pixel age calculating unit 310, a first storage unit 320, a first compensation unit 330, a second storage unit 340 And a second compensating unit 350. [

Referring to FIG. 4, the pixel age calculating unit 310 receives image data and temperature information of the display panel, and calculates a pixel age of the pixel, that is, a pixel included in the pixel, based on the image data and the temperature information, It is possible to calculate the pixel age corresponding to the cumulative lifetime of electronic devices such as transistors and the like. The cumulative life calculation algorithm may calculate pixel-by-pixel pixel age data using a temperature acceleration coefficient, a gradation acceleration coefficient, a frame rate, and an emission duty dimming based on image data and temperature information. The calculated pixel age data for each pixel may be stored in a memory and updated periodically.

The first storage unit 320 stores information on a modeling characteristic-age curve (Vth_model_curve) indicating the degree of deterioration of the characteristics of the reference pixel modeled according to driving time. The characteristic of the pixel can replace the threshold voltage characteristic of the driving transistor in the pixel.

The first compensation unit 330 includes a first compensation control unit 331 and a first compensation data determination unit 333.

The first compensation controller 331 receives the sensing characteristic data Vth_S of the pixel from the sensing unit 600. The first compensation control unit 331 stores the first compensation data Vth_C1 determined by the first compensation data determination unit 333 in the second storage unit 340. [

The first compensation controller 331 calculates the primitive characteristic data Vth_org indicating the primitive characteristics of the pixel using the sensing reference data corresponding to the sensing characteristic data Vth_S and the sensing reference voltage.

The first compensation data determination unit 333 determines the prediction characteristic data corresponding to the pixel age based on the pixel age provided from the pixel age calculating unit 310 and the modeling characteristic- (Vth_model_A).

The first compensation data determination unit 333 determines the first compensation data Vth_C1 by applying the prediction characteristic data Vth_model_A to the raw characteristic data Vth_org.

The first compensation data (Vth_C1) may be defined as Equation (1).

&Quot; (1) "

The second compensation unit 350 includes a second compensation control unit 351 and a second compensation data determination unit 353.

The second compensation control unit 351 receives the first compensation data Vth_C1 of the pixel from the second storage unit 340 and outputs the first compensation data Vth_C1 to the second compensation data determination unit 353 ).

The second compensation data determination unit 353 determines the second compensation data based on the pixel age provided from the pixel age calculating unit 310 and the prediction characteristic data corresponding to the pixel age based on the modeling characteristic- (Vth_model_A).

The second compensation data determination unit 353 determines the second compensation data Vth_C2 of the pixel by using the first compensation data Vth_C1 and the prediction characteristic data Vth_model_A provided from the second compensation control unit 351 .

The second compensation data (Vth_C2) may be defined by the following equation (2).

&Quot; (2) "

The second compensation data determination unit 353 provides the second compensation data Vth_C2 to the second compensation control unit 351. [

The second compensation controller 351 outputs correction data DATA_C based on the second compensation data Vth_C2 received from the second compensation data determiner 353 on the pixel video data DATA.

The compensation application processor 300 according to the present embodiment generates first compensation data Vth_C1 for real-time compensation of the sensing characteristic data Vth_S in a sensing mode, and supplies the first compensation data Vth_C1 with a pixel age The second compensation data Vth_C2 is calculated by adding the prediction characteristic data Vth_model_A corresponding to the second compensation data Vth_model_A. The compensation application processor 300 generates compensation data DATA_C of the pixel based on the second compensation data Vth_C2 in the display mode after the sensing mode.

Accordingly, compensation data that can compensate for pixel deterioration according to the driving time is calculated, and the display quality according to the pixel can be improved by correcting the video data of the pixel using the compensation data.

5 is a conceptual diagram for explaining a method of compensating pixel deterioration in real time according to an embodiment of the present invention. 6 is a flowchart illustrating a method of real-time compensation of pixel deterioration according to an exemplary embodiment of the present invention.

3, 5 and 6, when the display device is powered off in the first section T1, the display device is driven in the first sensing mode SM1 in the first section T1.

In the first sensing mode SM1, the first compensator 330 may determine the first compensation data of the pixel based on the sensing characteristic data sensed in the first interval T1.

For example, the first compensation control unit 331 receives the sensing characteristic data Vth_S_1 of the pixel from the sensing unit in the first period T1 (step S111). The first compensation controller 331 subtracts the sensing reference data Vref corresponding to the sensing reference voltage from the sensing characteristic data Vth_S_1 to calculate the pixel characteristic data Vth_org_1 (step S113).

The pixel age calculating unit 310 calculates a pixel age A1 corresponding to the first section T1. The first compensation data determiner 333 determines the predictive characteristic data corresponding to the pixel age A1 based on the pixel age A1 and the modeling characteristic-age curve provided by the first storage 320 Vth_model_A1) (step S115).

The first compensation data determiner 333 applies the predictive characteristic data Vth_model_A1 of the pixel age A1 to the primitive characteristic data Vth_org_1 to calculate the first compensation data Vth_model_A1 of the pixel corresponding to the first interval T1 And determines the compensation data Vth_C1_1 (step S117).

The first compensation data (Vth_C1_1) of the pixel corresponding to the first section (T1) can be defined as Equation (3).

&Quot; (3) "

The first compensation data determination unit 333 stores the first compensation data Vth_C1_1 of the first interval T1 in the second storage unit 340 (step S119).

According to the present embodiment, when the display device is powered on after the first sensing mode SM1, the display device is driven in the first display mode DM1. During the first display mode DM1, the second compensation data determination unit 350 may generate second compensation data that compensates for pixel deterioration in real time in accordance with an increase in the pixel age.

For example, referring to the eleventh section T11 of the first display mode DM1, the second compensation controller 351 receives the image data DATA of the pixel (step S121). The second compensation control unit 351 receives the first compensation data Vth_C1_1 of the pixel from the second storage unit 340 and outputs the first compensation data Vth_C1_1 to the second compensation data determination unit 353 (Step S123).

The pixel age calculating unit 310 calculates the pixel age A11 corresponding to the eleventh section T11. The second compensation data determination unit 353 determines the prediction characteristic data Vth_model_A11 corresponding to the pixel age A11 based on the pixel age A11 and the modeling characteristic- (Step S125).

The second compensation data determination unit 353 determines the second compensation data using the first compensation data Vth_C1_1 and the prediction characteristic data Vth_model_A11 provided from the second compensation controller 351, The second compensation data Vth_C2_11 is determined (step S127).

The second compensation data Vth_C2_11 of the pixel corresponding to the eleventh section T11 may be defined as Equation (4).

&Quot; (4) "

The second compensation control unit 351 receives the video data DATA of the pixel and receives the second compensation data Vth_C2_11 of the pixel from the second compensation data determination unit 353. [ The second compensation controller 351 corrects the image data (DATA) of the pixel based on the second compensation data (Vth_C2_11) (step S129).

Next, when the display device is powered off in the second section T2, the display device is driven in the second sensing mode SM2 in the second section T2.

In the second sensing mode SM2, the first compensation controller 331 receives the sensing characteristic data Vth_S_2 of the pixel in the second section T2 (step S111). The first compensation controller 331 subtracts the sensing reference data Vref from the sensing characteristic data Vth_S_2 to calculate the pixel characteristic data Vth_org_2 (step S113).

The pixel age calculating unit 310 calculates a pixel age A22 corresponding to the second section T2. The first compensation data determiner 333 determines the predictive characteristic data corresponding to the pixel age A2 based on the pixel age A2 and the modeling characteristic-age curve provided in the first storage 320 Vth_model_A2) (step S115).

The first compensation data determiner 333 applies the predictive characteristic data Vth_model_A2 of the pixel age A2 to the raw characteristic data Vth_org_2 to calculate the first compensation data Vth_model_A2 of the pixel corresponding to the second section T2, And determines the compensation data Vth_C1_2 (step S117).

The first compensation data (Vth_C1_2) of the pixel corresponding to the second section (T2) can be defined by the following equation (5).

Equation (5)

The first compensation data determination unit 333 stores the first compensation data Vth_C1_2 of the pixel corresponding to the second section T2 in the second storage unit 340 (step S119).

According to the present embodiment, when the display device is powered on after the second sensing mode SM2, the display device is driven in the second display mode DM2. During the second display mode DM2, the second compensation data determination unit 350 may generate second compensation data that compensates for pixel deterioration in real time in accordance with an increase in the pixel age.

For example, referring to the twenty-second section T22 of the second display mode DM2, the second compensation controller 351 receives the image data DATA of the pixel (step S121). The second compensation control unit 351 receives the first compensation data Vth_C1_2 of the pixel from the second storage unit 340 and outputs the first compensation data Vth_C1_2 to the second compensation data determination unit 353 (Step S123).

The pixel age calculating unit 310 calculates the pixel age A22 corresponding to the twenty-second section T22. The second compensation data determining unit 353 determines the pixel age A22 based on the pixel age A22 calculated from the pixel age calculating unit 310 and the modeling characteristic- age curve provided in the first storage unit 320. [ The predictive characteristic data (Vth_model_A22) corresponding to the predictive characteristic data (Step S125).

The second compensation data determination unit 353 determines the second compensation data using the first compensation data Vth_C1_2 and the prediction characteristic data Vth_model_A22 provided from the second compensation control unit 351, The second compensation data Vth_C2_22 is determined (step S127).

The second compensation data Vth_C2_22 of the pixel corresponding to the twenty-second section T22 may be defined as Equation (6).

&Quot; (6) "

The second compensation control unit 351 receives the video data DATA of the pixel and receives the second compensation data Vth_C2_22 of the pixel from the second compensation data determination unit 353. The second compensation controller 351 corrects the image data (DATA) of the pixel based on the second compensation data (Vth_C2_22) (step S129).

Next, when the display device is powered off in the third period T3, the display device is driven in the third sensing mode SM3 in the third period T3.

In the third sensing mode SM3, the first compensation controller 331 receives the sensing characteristic data Vth_S_3 of the pixel in the third period T3 (step S111). The first compensation controller 331 subtracts the sensing reference data Vref from the sensing characteristic data Vth_S_3 to calculate the primitive characteristic data Vth_org_3 of the pixel (step S113).

The pixel age calculating unit 310 calculates a pixel age A3 corresponding to the third section T3. The first compensation data determiner 333 determines the predictive characteristic data corresponding to the pixel age A3 based on the pixel age A3 and the modeling characteristic- Vth_model_A3) (step S115).

The first compensation data determiner 333 applies the predictive characteristic data Vth_model_A3 of the pixel age A3 to the raw characteristic data Vth_org_3 to calculate the first compensation data Vth_model_A3 of the pixel corresponding to the third section T3 And determines the compensation data Vth_C1_3 (step S117).

The first compensation data Vth_C1_3 of the pixel corresponding to the third section T3 may be defined as Equation (7).

&Quot; (7) "

The first compensation data determination unit 333 stores the first compensation data Vth_C1_3 of the pixel corresponding to the third period T3 in the second storage unit 340 (step S119).

As shown in the figure, the first compensation data Vth_C1_3 of the pixel in the third period T3 may be negative.

According to the present embodiment, when the display device is powered on after the third sensing mode SM3, the display device is driven in the third display mode DM3. During the third display mode DM3, the second compensation data determination unit 350 may generate second compensation data to compensate for pixel deterioration in real time in accordance with an increase in the pixel age.

For example, referring to the 33nd section T33 of the third display mode DM3, the second compensation controller 351 receives the image data DATA of the pixel (step S121). The second compensation control unit 351 receives the first compensation data Vth_C1_3 of the pixel from the second storage unit 340 and outputs the first compensation data Vth_C1_3 to the second compensation data determination unit 353 (Step S123).

The pixel age calculating unit 310 calculates the pixel age A33 corresponding to the 33nd time interval T33. The second compensation data determination unit 353 determines the pixel age A33 based on the pixel age A33 calculated from the pixel age calculating unit 310 and the modeling characteristic-age curve provided from the first storage unit 320, (Vth_model_A33) corresponding to the predictive characteristic data (Vth_model_A33) (step S125).

The second compensation data determination unit 353 determines the second compensation data Vth_C1_3 and Vth_model_A33 using the first compensation data Vth_C1_3 and the prediction characteristic data Vth_model_A33 provided from the second compensation controller 351, And determines the second compensation data Vth_C2_33 of the pixel (step S127).

The second compensation data (Vth_C2_33) of the pixel corresponding to the thirty-third section (T33) can be defined by the following equation (8).

&Quot; (8) "

The second compensation control unit 351 receives the image data DATA of the pixel and receives the second compensation data Vth_C2_33 of the pixel from the second compensation data determination unit 353. [ The second compensation controller 351 corrects the image data (DATA) of the pixel based on the second compensation data (Vth_C2_33) (step S129).

According to the embodiments described above, it is possible to improve the display quality of the image displayed on the pixel by correcting the image data using the second compensation data obtained by adding the prediction characteristic data according to the pixel age to the first compensation data generated in the sensing mode .

The present invention can be applied to a display device and various devices and systems including the same. Therefore, the present invention can be applied to a mobile phone, a smart phone, a PDA, a PMP, a digital camera, a camcorder, a PC, a server computer, a workstation, a notebook, a digital TV, a set- And the like can be usefully used in various electronic devices.

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 present invention as defined by the following claims. It will be understood.

100: display panel 200: control signal generator
300: Compensation Application Processor
400: Data driver 500:
600: sensing unit 310: pixel age calculating unit
320: first storage unit 340: second storage unit
330: first compensation unit 331: first compensation control unit
333: First compensation data determination unit
350: second compensation unit 351: second compensation control unit
353: second compensation data determination unit

Claims (20)

A pixel age calculating unit for calculating a pixel age corresponding to a cumulative lifetime of the pixel;
A first storage unit for storing information on a modeling characteristic-age curve representing a characteristic deterioration according to driving time of a base modeled reference pixel; And
The sensing characteristic data sensing the characteristic of the pixel in the sensing mode, determining the prediction characteristic data corresponding to the pixel age using the calculated pixel age and the modeling characteristic-age curve, And a first compensation unit for generating first compensation data using the raw characteristic data and the prediction characteristic data. The apparatus of claim 1, further comprising: a second storage for storing the first compensation data; and
Determining a prediction characteristic data corresponding to the pixel age using a pixel age and a modeling characteristic-age curve calculated based on the image data of the pixel received in the display mode, and using the first compensation data and the prediction characteristic data And a second compensation unit for generating second compensation data by the second compensation unit. The compensation application processor according to claim 2, wherein the second compensation unit generates correction data for correcting the image data of the pixel based on the second compensation data. 3. The apparatus of claim 2, wherein the first compensation unit
Calculating the raw characteristic data of the pixel by subtracting the sensing reference data set in the sensing characteristic data,
Wherein the first compensation data corresponds to a difference between the raw characteristic data and the prediction characteristic data. 3. The compensation application processor according to claim 2, wherein the second compensation data corresponds to a sum of the first compensation data and the prediction characteristic data. A display panel including a plurality of pixels;
A sensing unit for outputting sensing characteristic data obtained by sensing a characteristic of a pixel;
A pixel age calculating unit for calculating a pixel age corresponding to a cumulative lifetime of the pixel;
A first storage unit for storing modeling characteristic-age curve information indicative of characteristic deterioration according to a driving time of the base modeled reference pixel;
Determining the prediction characteristic data corresponding to the pixel age by using the calculated pixel age and the modeling characteristic-age curve in a sensing mode, and using the sensing characteristic data and the prediction characteristic data A first compensation unit for generating first compensation data; And
Determining a prediction characteristic data corresponding to the pixel age using a pixel age and a modeling characteristic-age curve calculated based on the image data of the pixel received in the display mode, and using the first compensation data and the prediction characteristic data And a second compensation unit for generating second compensation data. The display device of claim 6, further comprising a second storage unit for storing the first compensation data. The display device according to claim 6, wherein the second compensation unit corrects the image data of the pixel based on the second compensation data and generates correction data of the pixel. 7. The apparatus of claim 6, wherein the first compensation unit
Calculating the raw characteristic data of the pixel by subtracting the sensing reference data set in the sensing characteristic data,
Wherein the first compensation data corresponds to a difference between the raw characteristic data and the prediction characteristic data. The display device according to claim 6, wherein the second compensation data corresponds to a sum of the first compensation data and the prediction characteristic data. The method of claim 6,
Organic light emitting diodes;
A driving transistor connected to an anode electrode of the organic light emitting diode; And
And a storage capacitor connected to a gate electrode of the driving transistor. 12. The display device according to claim 11, wherein a characteristic of the pixel is a threshold voltage of the driving transistor. 7. The display device according to claim 6, wherein the display device is driven in the sensing mode for a set time after being powered off. The sensing characteristic data sensing the characteristic of the pixel is received and the first predictive characteristic data corresponding to the pixel age is determined using the pixel age and the modeling characteristic-age curve of the pixel, And generating first compensation data using the first prediction characteristic data; And
Calculating a pixel age of the pixel based on the image data of the received pixel in the display mode, determining second predictive characteristic data corresponding to the pixel age using the pixel age and the modeling characteristic-age curve, And generating second compensation data using the first compensation data and the second prediction characteristic data. 15. The driving method of a display device according to claim 14, further comprising the step of correcting the image data based on the second compensation data in the display mode. 15. The method of claim 14, further comprising the step of storing the first compensation data in the sensing mode. 15. The method of claim 14, further comprising the step of calculating raw characteristic data of the pixel by subtracting the sensing reference data set in the sensing characteristic data in the sensing mode,
Wherein the first compensation data corresponds to a difference between the raw characteristic data and the first predictive characteristic data. 15. The driving method of a display device according to claim 14, wherein the second compensation data corresponds to a sum of the first compensation data and the second prediction characteristic data. 15. The method according to claim 14, wherein a characteristic of the pixel is a threshold voltage of the driving transistor. 15. The method according to claim 14, wherein the display device is driven in the sensing mode for a set time after being powered off.

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