KR20150078753A - Orgainc emitting diode display device and compensating method thereof - Google Patents

Abstract

The present invention relates to an organic light-emitting diode (OLED) display device and a compensation method thereof, wherein a change in a format of compensation information can enhance compensation capability and reduce a sensing time. The compensation method of the present invention comprises the steps of: loading a color gain indicating properties-related correlation of one representative subpixel and each of the remaining subpixels for each pixel, first compensation information for compensating mobility of the representative subpixel and second compensation information for compensating a threshold voltage for each subpixel from an nonvolatile memory; compensating the data to be provided for the representative subpixel by using the first compensation information and compensating the data to be provided for each of the remaining subpixels by using a result from the operation of the first compensation information and the color gain; and compensating the compensated data by using the second compensation information.

Description

TECHNICAL FIELD [0001] The present invention relates to an organic light emitting diode (OLED) display device and a method of compensating the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting diode (OLED) display device, and more particularly, to an OLED display device capable of improving a compensation capability by changing the format of compensation information, ≪ / RTI >

2. Description of the Related Art Recently, flat panel display devices that display images using digital data include liquid crystal displays (LCDs) using liquid crystals, OLED display devices using OLEDs, electrophoretic displays (EPDs) using electrophoretic particles ).

Of these, OLED display devices are self-luminous devices that emit organic light-emitting layers by recombination of electrons and holes, and are expected to be a next-generation display device because of their high luminance, low driving voltage, and ultra thin films.

Each of the plurality of pixels (subpixels) constituting the OLED display device includes an OLED element composed of an organic light emitting layer between the anode and the cathode, and a pixel circuit independently driving the OLED element. The pixel circuit includes at least a switching transistor and a storage capacitor and a driving transistor. The switching transistor charges the storage capacitor with a voltage corresponding to the data signal in response to the scan pulse, and the driving transistor controls the current supplied to the OLED element according to the voltage charged in the storage capacitor to adjust the amount of light emitted from the OLED element. The amount of light emission of the OLED is proportional to the current supplied from the driving transistor.

The OLED display has a problem of luminance non-uniformity among sub-pixels due to various reasons. For example, there are differences in driving characteristics for each subpixel such as a threshold voltage (hereinafter referred to as Vth) and mobility of a driving TFT due to a process variation or the like, and deterioration of the driving TFT and the OLED element The driving characteristic of each pixel is varied, which causes a problem of non-uniformity of luminance with respect to the same data.

In order to solve such a problem, the OLED display device uses an external data compensation method of sensing characteristic information of each sub-pixel and compensating the video data using the sensing information.

The compensation information applied to each subpixel includes first compensation information for compensating the mobility characteristic of the driving TFT and second compensating information for compensating the Vth characteristic of the driving TFT and is stored in a DDR (Double Data Rate) memory .

There is a restriction on the number of bits of the first and second compensation information for each subpixel due to the bandwidth limitation of the DDR memory. Accordingly, there is a disadvantage in that the compensating capability is insufficient at a low gray level due to insufficient resolution and compensation margin in representing compensation information for each sub-pixel.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an OLED display device capable of improving a compensation capability by changing the format of compensation information, Method.

According to an aspect of the present invention, there is provided a method of compensating for an OLED display, comprising: a color gain indicating a characteristic correlation between one representative subpixel and each of the remaining subpixels of each pixel; Loading compensation information for mobility compensation and second compensation information for threshold voltage compensation of each subpixel in a nonvolatile memory; Compensating data to be supplied to the representative subpixel using the first compensation information and compensating data to be supplied to each of the remaining subpixels using a result of calculating the first compensation information and the color gain, ; And compensating the compensated data using the second compensation information.

An OLED display according to an embodiment of the present invention includes: a display panel including a plurality of subpixels each of which constitutes a pixel array, the plurality of subpixels having different colors; A color gain indicating a characteristic correlation between one representative subpixel of each of the pixels and each of the remaining subpixels; compensation information for compensating mobility of the representative subpixel; A memory for storing second compensation information; Wherein data to be supplied to the representative subpixel is compensated using the first compensation information and data to be supplied to each of the remaining subpixels is compensated by using a result of calculating the first compensation information and the color gain; And the compensated data includes a timing controller that compensates using the second compensation information.

The color gain is set in advance as a ratio between initial compensation information for compensating initial mobility characteristics of the representative subpixel obtained through modeling and initial compensation information for compensating initial mobility characteristics of each of the remaining subpixels .

The timing controller senses the characteristics of the subpixel through a data driver driving the display panel in at least one of a boot mode at power-on, a real-time mode for a blank period at the time of real-time driving, And updates the first and second compensation information.

Wherein the timing controller updates the first compensation information by sensing only the representative sub-pixel among the pixels in the boot mode; Updating the first and second compensation information by sensing each sub-pixel in the real-time mode, or updating the second compensation information; Sensing the subpixels in the end mode to update the second compensation information; Sensing the voltage distribution by sensing the subpixels of a specific horizontal line before updating the second compensation information and determining a sensing range of the ADC for converting the sensing signal of each subpixel into sensing data in the data driver as a reference range Can be adjusted.

Wherein the sensing range of the ADC is set to an initial sensing range that is greater than the reference range in an initial compensation mode prior to shipment of the product and is used to set initial compensation information for the first and second compensation information and the color gain, Wherein the first compensation information is used when the initial compensation information is updated to the first compensation information and the second compensation information is set to the reference range and the reference range is updated when the first compensation information and the second compensation information are updated in the boot mode, .

The OLED display and its compensation method according to the present invention stores first compensation information for compensating mobility of representative subpixels among the pixels as a representative value and first compensation information of the remaining subpixels stores a color gain and a representative value And calculate and apply them.

Accordingly, the number of bits of the first compensation information can be increased to improve the mobility compensation resolution, and the space occupied by the first compensation information in the memory is reduced so that the first compensation information is reduced to the second space for the Vth compensation By increasing the number of bits of the compensation information, the Vth compensation resolution can also be improved, so that the compensation capability can be improved.

Also, since the first compensation information is detected by sensing only the first subpixel in each pixel in the initial compensation, the sensing time can be reduced compared to the case of sensing all the subpixels in each pixel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a comparison of the number of compensation information bits of each pixel of the OLED display according to the prior art and the present invention.
FIG. 2 is a view showing a comparison of the compensation resolution of the OLED display according to the prior art and the present invention.
3 is a diagram showing a comparison of mobility compensation ranges of the OLED display according to the present invention and the prior art.
4 is a view showing a sensing frame for compensating mobility of an OLED display according to the present invention.
FIG. 5 is a flowchart showing an initial compensation method of an OLED display according to an embodiment of the present invention before shipment.
FIG. 6 is a flowchart illustrating a method of real-time compensation of an OLED display according to an exemplary embodiment of the present invention.
7 is a flowchart illustrating a method of compensating for a termination mode of an OLED display according to an exemplary embodiment of the present invention.
8 is a block diagram schematically showing an OLED display device according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a comparison of the number of compensation information bits of each pixel of the OLED display according to the prior art and the present invention.

The OLED display device stores the first compensation information (alpha) for compensating the mobility characteristic of the driving TFT of each sub pixel and the second compensation information (Vth) for compensating the Vth characteristic of the driving TFT in the DDR memory, External compensation is performed.

Due to the limitation of the bandwidth of the DDR memory, the first compensation information? Of each of the R / W / G / B subpixels is set to X bits and the second compensation information Vth Is set to Y (> X) bits, and compensation information of Z (= X + Y) bits per subpixel is generally stored in the DDR memory.

Alternatively, in the present invention, only the first compensation information? Of the first subpixel among R / W / G / B subpixels is stored as a representative value in the DDR memory and the first compensation information? Calculates and applies the color gain indicating the proportional relation between the first subpixel and the first compensation information of each of the remaining subpixels and the calculation using the representative value alpha.

This is because the first compensation information? Of each R / W / G / B subpixel differs depending on the mobility characteristics of the initial TFTs, but is proportional to each other, is not affected by cumulative electric stress, W / G / B sub-pixel in the initial sensing stage before shipment because the mobility characteristic is changed according to environmental conditions such as lightness and roughness, but maintains the initial proportional relationship and maintains the proportional characteristic even after the driving time has elapsed. It is possible to define the proportional relation to each initial mobility characteristic and define it as color gain and use it.

 1B and 1C, the first compensation information?, Which is a representative value among the compensation information spaces (Z * 4 bits) for each pixel, X> (> X) bit only for the pixel and the second compensation information Vth of each of the R / W / G / B subpixels in the remaining space (Z-X ' > Y) bits.

Therefore, the present invention can expand the first compensation information (alpha) and the second compensation information (Vth) to be applied to each subpixel bit without increasing the total size (Z bit) of compensation information for each pixel Therefore, the compensation resolution and the compensation margin can be improved.

2 is a view showing a comparison between the compensation resolution of the second compensation information of the OLED display according to the present invention and the prior art.

2 (a), since the second compensation information Vth can be set to the maximum Y bits in the prior art, the sensing range of the analog-digital converter (hereinafter referred to as ADC) in the digital driver is set to the first voltage D), and the sensing signal including the characteristics of each sub-pixel is converted into Y bit sensing data and transmitted to the timing controller. However, since the timing controller sets the second voltage (E > D), which is larger than the first voltage (D), to compensate for deterioration with the lapse of driving time, the compensation margin is insufficient, And the second compensation information Vth for compensating Vth is set to Y-1 bits within the second voltage (E) compensation range. Therefore, since the second compensation information Vth for compensating the Vth is reduced by 1 bit from the Y bit, the resolution based on the Y-1 bit of the second compensation information Vth is 2/1 And the Vth compensation resolution is insufficient.

On the other hand, as shown in FIG. 2 (b), in the present invention, the sensing range of the ADC is set to a high-resolution third voltage (H = D / 3) and converted into Y-bit sensing data to be transmitted to the timing controller. Since the ADC sensing range is sufficiently small as the third voltage (H = D / 3), the timing controller can compensate for Vth by compensating for the compensation margin even if the Vth compensation range is set to the second voltage 2 compensation information Vth can be set to Y bits in the same manner as the sensing data, so that the resolution of the sensing data can be compensated for at all.

Further, since it is possible to set the second compensation information Vth to the Y 'bit larger than the Y bit, the present invention can increase the Yth bit resolution within the Vth compensation range second voltage E have.

3 is a diagram showing a comparison of mobility compensation ranges of the OLED display according to the present invention and the prior art.

In the prior art, the number of bits of the first compensation information [alpha] for compensating the mobility characteristic for each subpixel is limited to X bits, and the mobility compensation range is limited to -20% to 20% In the case of the left part of the panel, if the mobility is 15-20% and the mobility is increased by 7% per 10 degrees of temperature, if the panel temperature is above 40 degrees, compensation margin is insufficient, I can see the difficulty.

On the other hand, in the present invention, since the number of bits of the first compensation information (alpha) for compensating the mobility characteristic for each subpixel is increased to X 'bits and the mobility compensation range is increased from -50% to 50% It can be seen that low gradation compensation is possible.

4 is a view showing a sensing frame for compensating mobility of an OLED display according to the present invention.

The OLED display device according to the present invention senses only the representative subpixels corresponding to the first color among the plurality of colors of each pixel as shown in FIG. 4 for mobility compensation, the first compensation information for each of the remaining color subpixels in each pixel includes a color gain g indicating a correlation between the representative subpixel and the corresponding subpixel, Is calculated and used by calculation using the value [alpha].

For example, when the R subpixel is set as the representative subpixel, only the R subpixels are sensed for mobility compensation to detect the first compensation information? R as a representative value, and the remaining color subpixels The condition compensation information (? _W,? _G,? _B) for each is detected by multiplying the color gain g_W, g_G, g_B representing the correlation between the reference subpixel and the other subpixel by the representative value? _R.

The color gain g is previously set by calculating the ratio of the representative first subpixel through the modeling to the initial first compensation information of the subpixel at the stage of connecting the initial compensation information before shipment of the product.

(M_R, m_W, m_G, m_B) of the color-dependent initial first compensation information (? R,? _W,? _G,? _B) in the Nth horizontal line as representative values. G / B subpixel based on the R subpixel as shown below by calculating the ratio of each of the average values m_W, m_G and m_B of the W / G / B subpixels based on the average value m_R of the R subpixels, The color gains g_W, g_G and g_B for the respective colors can be detected.

g_W = m_W / m_R

g_G = m_G / m_R

g_B = m_B / m_R

Accordingly, since only representative sub-pixels of each pixel need to be sensed in order to compensate mobility, the sensing time can be shortened to 1/4 of the prior art that sequentially senses each of R / W / G / B subpixels have.

FIG. 5 is a flow chart showing a method of an initial method before a product is shipped in an OLED display according to an embodiment of the present invention.

The initial compensation step is started in step 2 (S2), the ADC sensing range is set to 3V in step 4 (S4), the representative horizontal line is sensed in step 6 (S6), and the reference voltage Eref and data Voltage and so on.

Initial frame sensing is performed in step 8 (S8), initial initial compensation information for compensating the mobility of each subpixel based on the sensing information of each subpixel in step 10 (S10), and initial initial compensation information for compensating for Vth The second compensation information is set and stored in the DDR memory of the timing controller. Also, the color gain for each of the remaining subpixels indicating the ratio of the initial first compensation information of the representative subpixel to the first initial compensation information of each of the remaining subpixels in each pixel is calculated and stored in the DDR memory. The color gain may be calculated as a ratio of an average value to the first initial compensation information of representative horizontal lines or representative subpixels of each frame and an average value to the first initial compensation information of each of the remaining subpixels.

The ADC sensing range is set to the first voltage (D) in step 12 (S12), the first and second initial compensation information are applied in step 14 (S14), and the compensated data is used to update- In step 16 (S16), the initial first and second compensation information is updated and stored using the update sensing information of each subpixel.

In step S18, other set values (display ON and register lead ratio, gain, setting voltage, etc.) are set, and then the product is shipped (S20).

As described above, the OLED display according to the present invention updates the compensation information by sensing the ADC sensing range by setting the ADC sensing range to the first voltage (D) before updating the product to the third voltage (H) for high resolution, The ADC sensing range is set to the third voltage (H) for the high resolution when the external compensation is performed after the shipment, so that the compensation resolution can be improved.

FIG. 6 is a flowchart illustrating a method of real-time compensation of an OLED display according to an exemplary embodiment of the present invention.

When the power is turned on in step 22 (S22), the ADC sensing range is set to the third voltage (H) for high resolution in step 22 (S24), and the register information from the nonvolatile memory in step 26 And the second compensation information, the color gain, and the reference value (mobility, Vth) to be used in real-time compensation are loaded into the DDR memory.

In step 28 (S28), initial compensation is performed to compensate for mobility characteristics that vary depending on the surrounding environment such as ambient temperature and illumination. The representative value corresponding to the first compensation information of the representative subpixel is updated by sensing only representative subpixels of each pixel with initial compensation.

The display is turned on in step 30 (S30). If the drive mode corresponds to the active period of the vertical synchronizing signal in step 32 (S32), data is compensated by using the first and second compensation information in step 34 (S34) , And the display panel is normally driven using the compensated data. When the data of each subpixel is compensated for using the first compensation information, the data of the representative subpixel of each pixel is compensated by using a representative value, which is the first compensation information of the representative subpixel from the memory, Each data is compensated by using the representative value from the memory and the first compensation information calculated by multiplying the corresponding color gain. The data of each subpixel is compensated using the second compensation information of each subpixel from the memory.

If the sensing mode corresponds to the blanking period of the vertical synchronizing signal in step 36 (S36), the characteristic of each subpixel is sensed in real-time compensation in step 38 (S38) to update the first and second compensation information.

Steps 30 (S30) to 38 (S38) are repeated until the power off signal is input in step 40 (S40), and when the power off signal is input, the process proceeds to the end mode (S42).

7 is a flowchart illustrating a method of compensating in an end mode of an OLED display according to an exemplary embodiment of the present invention.

When the fore-off signal is input in step 40 (S40) of Fig. 6, the end mode is started in step 42 (S42), and is turned off in step 44 (S44).

The sensing voltage is set in step 46 (S46), and the specific lines are sensed in step 48 (S48). For example, three horizontal lines are sensed.

In step 50 (S50), the voltage distribution of the sensing signals is compared to detect the sensing voltage range.

If the sensing voltage range is not less than the third voltage H for high resolution in step 52 (S52), the ADC voltage range is set back to the third voltage H for high resolution in step 54 (S54).

If the sensing voltage range is the third voltage H for high resolution in step 52 (S52), the sensing of the end mode is performed in step 56 (S56) to update the compensation information (e.g., second compensation information) The power is turned off at 58 (S58).

8 is a block diagram schematically showing an OLED display device according to an embodiment of the present invention.

The OLED display device shown in Fig. 8 includes a timing controller 10, a data driver 20, a gate driver 30, a gamma voltage generator 40, a display panel 50, a NAND flash memory 60, and a DDR memory 70).

In NAND flash memory 60, which is a non-volatile memory, compensation information and color gain are preset and stored together with various control information to be used in the timing controller 10. [ Various information stored in the NAND flash memory 60 is loaded into the DDR memory 70 which is a volatile memory at boot time when the power of the OLED display device is turned on and used by the timing controller 10.

The compensation information is preset before shipment of the product, and the first compensation information for compensating the mobility characteristics of representative sub-pixels among the R / G / B or R / W / G / And does not include the first compensation information for the remaining color subpixels. In addition, the compensation information includes second initial compensation information for compensating the threshold voltage characteristic of each subpixel.

The color gain representing the proportional relationship between the representative subpixel and each of the remaining color subpixels is determined through pre-shipment modeling.

The timing controller 10 generates a data control signal and a gate control signal for controlling the driving timings of the data driver 20 and the gate driver 30 using a plurality of synchronous signals inputted from the outside, And the gate driver 30.

The timing controller 10 modulates an input image through various data modulation methods for improving image quality and power consumption, and outputs the modulated data to the data driver 20. [

The timing controller 10 compensates the data using the compensation information stored in the DDR memory 70 and outputs the compensated data. When the data of each subpixel is compensated for using the first compensation information, the data of the representative subpixel of each pixel is compensated by using a representative value, which is the first compensation information of the representative subpixel from the memory, Each data is compensated by using the representative value from the memory and the first compensation information calculated by multiplying the corresponding color gain. The data of each subpixel is compensated using the second compensation information of each subpixel from the memory.

In addition, the timing controller 10 updates the compensation information by performing compensation of the boot mode at the time of power-on, real-time compensation of the blank period, and compensation of the power-off termination mode. In the compensation of the boot mode, the first compensation information (representative value) for compensating mobility sensitive to the surrounding environment is updated by sensing only representative sub-pixels among the respective pixels. The real-time compensation of the blank period updates each of the first and second compensation information by sensing each sub-pixel, or updates only the second compensation information. In the end mode, the ADC sensing range is checked and adjusted to a reference range (1V) corresponding to the third voltage (H) for high resolution, and each sub-pixel is sensed to update the second compensation information for Vth compensation.

The timing controller 10 determines the peak luminance according to the image characteristic information such as the average picture level (APL) detected from the input image, adjusts the gamma high potential power according to the determined peak luminance, And supplies the power source to the gamma voltage generating unit 40.

The gamma voltage generator 40 generates and supplies a gamma voltage set including a plurality of gamma voltages having different levels to the data driver 20. The gamma voltage generator 40 divides the high gamma voltage by a resistor string to generate and output a gamma voltage set including a plurality of gamma voltages. The gamma voltage generator 40 may be embedded in the data driver 20.

The data driver 20 converts the digital data from the timing controller 10 into an analog data signal in response to a data control signal from the timing controller 10 and supplies it to a plurality of data lines of the display panel 50. At this time, the data driver 20 subdivides the gamma voltage set from the gamma voltage generator 40 into gradation voltages corresponding to the gradation values of the data, and then uses the subdivided gradation voltages to convert the digital data into analog data signals . The data driver 20 is driven under the control of the timing controller 10 in a sensing mode for external compensation and a display mode for display driving.

The data driver 20 supplies the precharge data to the data line to drive the subpixel, and then senses a signal (voltage or current) including the characteristics of the subpixel through the sensing channel and converts it into a digital sensing signal through the ADC To the timing controller (10). The sensing range of the ADC is set to the third voltage (H) for high resolution. The sensing channel may be a reference line for supplying a reference voltage for driving each sub-pixel, a data line for supplying test data, or a sensing line (or a lead-out line) separately provided therefrom.

The data driver 20 includes at least one data drive IC and is mounted on a circuit film such as a tape carrier package (TCP), a chip on film (COF), or a flexible printed circuit (FPC) (Tape Automatic Bonding) method, or on a non-display area of the display panel 50 by a COG (Chip On Glass) method.

The gate driver 30 sequentially drives a plurality of gate lines of the display panel 50 in response to a gate control signal from the timing controller 10. [ The gate driver 30 supplies a gate-on voltage to the respective gate lines in response to the gate control signal, and supplies a gate-off voltage in the remaining periods. The gate driver 30 may receive a gate control signal directly from the timing controller 10 or may receive a gate control signal from the timing controller 10 via the data driver 20. [

The gate driver 30 is composed of at least one gate drive IC and is mounted on a circuit film such as TCP, COF, FPC or the like to be attached to the display panel 50 in a TAB manner, Area. ≪ / RTI > Alternatively, the gate driver 30 may be formed in a non-display area of the TFT substrate together with the TFT array formed in the pixel array of the display panel 50, thereby forming a gate in panel (GIP) type built in the display panel 50 .

The display panel 50 includes a pixel array in the form of a matrix. Each pixel of the pixel array implements a desired color with a combination of red (R), green (G), and blue (B) subpixels, and further has white (W) subpixels for luminance enhancement.

Each sub-pixel has an OLED element and a pixel circuit for driving the OLED element. The pixel circuit includes first and second switching TFTs ST1 and ST2, a driving TFT DT and a storage capacitor Cst. The pixel circuit further includes first and second gate lines GLn1 and GLn2 for controlling the first and second switching TFTs ST1 and ST2 respectively and a data line for supplying a data signal to the first switching TFT ST1 A reference line RLm for supplying a reference voltage Vref to the second switching TFT ST2, an ELVDD line for supplying a high potential power supply ELVDD to the driving TFT DT, And is connected to an ELVSS line that supplies a low potential power supply (ELVSS).

The first switching TFT ST1 charges the storage capacitor Cst with a voltage corresponding to the data signal from the data line DL in response to the control of the first gate line GLn1. At this time, the second switching TFT ST2 supplies the reference voltage Vref from the reference line RLm to the connection node between the driving TFT DT and the OLED element in response to the control of the second gate line GLn2 . The driving TFT DT controls the current supplied to the OLED element according to the voltage charged in the storage capacitor Cst to adjust the amount of light emitted from the OLED element. On the other hand, the second switching TFT ST2 can be used as a path for supplying the pixel current output to the reference line RLm according to the driving characteristic of the pixel circuit in the sensing mode.

As described above, the OLED display according to the present invention and the compensation method thereof store first compensation information for compensating mobility of representative sub-pixels among the pixels as representative values, and the first compensation information of the remaining sub- And calculating and applying the representative value.

Accordingly, the number of bits of the first compensation information can be increased to improve the mobility compensation resolution, and the space occupied by the first compensation information in the memory is reduced so that the first compensation information is reduced to the second space for the Vth compensation By increasing the number of bits of the compensation information, the Vth compensation resolution can also be improved, so that the compensation capability can be improved.

Also, since the first compensation information is detected by sensing only the first subpixel in each pixel in the initial compensation, the sensing time can be reduced compared to the case of sensing all the subpixels in each pixel.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, Can be carried out within a range. Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

10: timing controller 20: data driver
30: gate driver 40: gamma voltage generator
50: Display panel 60: NAND flash memory
70: DDR memory

Claims (16)

A method of compensating an OLED display device, wherein each of the pixels constituting the pixel array includes a plurality of sub-pixels having different colors,
A color gain indicating a characteristic correlation between one representative subpixel of each of the pixels and each of the remaining subpixels; compensation information for compensating mobility of the representative subpixel; Loading the second compensation information from the non-volatile memory;
Compensating data to be supplied to the representative subpixel using the first compensation information and compensating data to be supplied to each of the remaining subpixels using a result of calculating the first compensation information and the color gain, ;
And compensating the compensated data using the second compensation information. ≪ RTI ID = 0.0 > 31. < / RTI > The method according to claim 1,
The color gain is set in advance as a ratio between initial compensation information for compensating initial mobility characteristics of the representative subpixel obtained through modeling and initial compensation information for compensating initial mobility characteristics of each of the remaining subpixels Wherein the OLED display comprises a plurality of pixels. The method according to claim 1,
The first and second compensation information
Wherein at least one mode of the power-on boot mode, the real time mode of the blank period, and the power off mode is updated by sensing the subpixel in at least one mode. The method of claim 3,
Wherein the first compensation information is updated by sensing only the representative sub-pixels among the pixels in the boot mode. The method of claim 3,
Wherein the first compensation information is updated or the second compensation information is updated by sensing each subpixel in the real-time mode. The method of claim 3,
In the end mode
And the second compensating information is updated by sensing each of the sub-pixels. The method of claim 6,
The sensing range of the ADC that senses the subpixels of a specific horizontal line to obtain the voltage distribution and converts the sensing signal of each subpixel into sensing data is adjusted to a reference range before updating the second compensation information Of the OLED display. The method of claim 7,
The sensing range of the ADC is
The initial compensation range being set to an initial sensing range that is greater than the reference range in an initial compensation mode before shipment of the product and is used to set initial compensation information and the color gain for the first and second compensation information,
Wherein the first compensation information is used when the initial compensation information is updated to the first compensation information and the second compensation information,
Wherein the reference range is used when updating the first and second compensation information in the boot mode, the real time mode, and the end mode. A display panel including a plurality of subpixels each of which constitutes a pixel array has a different color;
A color gain indicating a characteristic correlation between one representative subpixel of each of the pixels and each of the remaining subpixels; compensation information for compensating mobility of the representative subpixel; A memory for storing second compensation information;
Wherein data to be supplied to the representative subpixel is compensated using the first compensation information and data to be supplied to each of the remaining subpixels is compensated by using a result of calculating the first compensation information and the color gain; Wherein the compensated data includes a timing controller that compensates for the compensated data using the second compensation information. The method of claim 9,
The color gain is set in advance as a ratio between initial compensation information for compensating initial mobility characteristics of the representative subpixel obtained through modeling and initial compensation information for compensating initial mobility characteristics of each of the remaining subpixels Characterized by an OLED display. The method of claim 9,
The timing controller
Pixels in a mode of at least one of a power-on boot mode, a real time mode of a blank period in a real time driving mode, and an end mode in a power off mode, the data driver driving the display panel, Lt; RTI ID = 0.0 > 2 < / RTI > compensation information. The method of claim 11,
The timing controller
And updates the first compensation information by sensing only the representative sub-pixels among the pixels in the boot mode. The method of claim 11,
The timing controller
Wherein the first and second compensation information are updated by sensing each of the subpixels in the real-time mode or updating the second compensation information. The method of claim 11,
The timing controller
And the second compensation information is updated by sensing each sub-pixel in the end mode. 15. The method of claim 14,
The timing controller
Sensing the voltage distribution by sensing the subpixels of a specific horizontal line before updating the second compensation information and determining a sensing range of the ADC for converting the sensing signal of each subpixel into sensing data in the data driver as a reference range The OLED display device comprising: 16. The method of claim 15,
The sensing range of the ADC is
The initial compensation range being set to an initial sensing range that is greater than the reference range in an initial compensation mode before shipment of the product and is used to set initial compensation information and the color gain for the first and second compensation information,
Wherein the first compensation information is used when the initial compensation information is updated to the first compensation information and the second compensation information,
Wherein the reference range is used when updating the first and second compensation information in the boot mode, the real time mode, and the end mode.

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