KR102576937B1 - Organic Light Emitting Diode display apparatus and method for performing off-real time sensing thereof - Google Patents

Abstract

Applying the present invention, when performing OFF-RS of an organic light emitting diode display device, the entire horizontal line of the display panel on which OFF-RS (real time sensing) is to be performed is divided into a plurality of sections. And when performing one RS, only selected section lines are sensed to calculate compensation data, and the calculated compensation data is updated in the lookup table. Updated compensation data is applied to the lookup table for selected section lines, and control signals and data applied to previously stored compensation data are generated for other section lines and provided to the data driver. Accordingly, an organic light emitting diode display device that effectively shortens the OFF-RS time can be implemented.

Description

Organic light emitting diode display apparatus and method for performing off-real time sensing thereof}

The present invention relates to an organic light emitting diode display device and a method of performing OFF-RS thereof. Specifically, when performing OFF-RS (real time sensing) in an organic light emitting diode display device, the entire line is not sensed one line at a time. An organic method that divides the entire line into multiple sections, calculates compensation data by sensing only selected section lines when performing a single RS, and updates the lookup table with the calculated compensation data to effectively shorten the time required for OFF-RS. It relates to a light emitting diode display device and its OFF-RS performance method.

Recently, various flat panel display devices that can reduce the weight and volume, which are disadvantages of cathode ray tubes, are being developed.

These flat display devices include Liquid Crystal Display (LCD), Field Emission Display (FED), Plasma Display Panel (PDP), and Electroluminescence Device (EL). there is.

Electroluminescent devices are roughly divided into inorganic electroluminescent devices and organic electroluminescent devices (hereinafter referred to as “OLED”) depending on the material of the light-emitting layer. They are self-luminous devices that emit light on their own and have the advantages of fast response speed, high luminous efficiency, brightness, and viewing angle. There is.

OLED includes an organic electroluminescent compound layer that emits electroluminescence, and a cathode electrode and an anode electrode that face each other with the organic electroluminescent compound layer interposed therebetween.

OLED produces excitons in the excitation process when holes and electrons injected into the cathode and anode electrodes recombine in the light-emitting layer, and emits light due to the energy from the excitons.

Organic light-emitting diode displays display images by electrically controlling the amount of light generated from the light-emitting layer of OLED.

An organic light emitting diode display device arranges pixels containing OLEDs in a matrix form and controls the brightness of pixels selected by a scan signal according to the gradation of video data.

In other words, an organic light emitting diode display device selects a pixel by selectively turning on the TFT, which is an active element, and maintains the pixel's light emission with a voltage maintained in the storage capacitor.

A pixel of such an organic light emitting diode display device may include an OLED, intersecting data lines and scan lines, a switch TFT, a driving TFT, and a storage capacitor.

The switch TFT turns on in response to a scan signal from the scan line, thereby conducting a current path between its source electrode and drain electrode. The switch TFT applies the data voltage from the data line to the gate electrode of the driving TFT and the storage capacitor during the on-time period.

The driving TFT controls the current flowing to the OLED according to the difference voltage (Vgs) between its gate electrode and source electrode.

The OLED is connected between the source electrode of the driving TFT and a low-potential driving voltage source. The brightness of the pixel is proportional to the current flowing through the OLED, and the current is determined by the difference voltage between the gate voltage and source voltage of the driving TFT, the threshold voltage (Vth) and mobility (μ) of the driving TFT, etc.

In general, non-uniformity in luminance between pixels in an organic light emitting diode display device is due to variations in the electrical characteristics of the driving TFT, including threshold voltage and mobility (μ).

One of the causes of variation in the electrical characteristics of the driving TFT between pixels is that the degree of deterioration of the TFT that progresses as the panel is driven varies for each pixel. Therefore, in order to minimize the difference in electrical characteristics of the driving TFT between pixels, a method of sensing the threshold voltage (Vth) of the driving TFT between pixels and compensating for this has been proposed.

Despite this compensation, variations in electrical characteristics of the driving TFT between pixels occur due to the mobility (μ) of the driving TFT and different parasitic capacitances for each position of the data line, and thus luminance unevenness between pixels continues to occur.

For example, OLED TV compensates for the Vth of the driving TFT when the TV is powered off to provide the same picture quality as the initial image quality after shipment. This is called OFF-RS (real time sensing). OFF-RS is a method of generating and updating compensation data by sensing the Vth of the entire screen while the screen is off.

Figure 1 is a diagram for explaining an OFF-RS performance method of a conventional organic light emitting diode display device.

Referring to Figure 1, in the conventional case, when performing OFF-RS of an organic light emitting diode display, the entire line is sensed one line at a time, and in the case of a UHD model, it takes about 10 minutes.

For products that must be operated continuously, the shorter the time the screen is off, the better, but in the case of conventional products, the OFF-RS sensing period is long, so the screen is off for a long time.

Additionally, as the OFF-RS sensing period becomes longer, there is a risk that incorrect compensation values may be generated and updated if an electrical shock is applied during the process.

The problem that the present invention aims to solve is that when performing OFF-RS (real time sensing) in an organic light emitting diode display device, instead of sensing the entire line one line at a time, the entire line is divided into a plurality of sections and when performing RS once, the entire line is divided into a plurality of sections. Provides an organic light emitting diode display device that can effectively shorten the time required for OFF-RS by sensing only selected section lines to calculate compensation data and update the look-up table with the calculated compensation data, and an OFF-RS performance method thereof. there is.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below. will be.

In the OFF-RS performance method of an organic light emitting diode display device according to one aspect of the present invention, the entire horizontal line of the display panel on which OFF-RS (real time sensing) is to be performed is divided into a plurality of sections. And when performing one RS, only selected section lines are sensed to calculate compensation data, and the calculated compensation data is updated in the lookup table. Updated compensation data is applied to the lookup table for selected section lines, and control signals and data applied to previously stored compensation data are generated for other section lines and provided to the data driver.

An organic light emitting diode display device according to another aspect of the present invention includes a display panel, a data driver, a scan driver, an RS execution unit, and a control unit. The RS execution unit divides all lines of the display panel into a plurality of sections and calculates compensation data by sensing only the selected section lines during one RS performance. The calculated RS performing unit updates the calculated compensation data in the lookup table and performs OFF-RS (real time sensing). The control unit applies the updated compensation data calculated by the RS execution unit to the lookup table for the selected section lines, and generates control signals and data applying previously stored compensation data to the other section lines and provides them to the data driver. do.

According to the present invention, when performing OFF-RS (real time sensing) in an organic light emitting diode display, instead of sensing the entire line one line at a time, the entire line is divided into a plurality of sections and the selected By sensing only section lines to calculate compensation data and updating the lookup table with the calculated compensation data, the time required for OFF-RS can be effectively shortened.

As the RS sensing period is shortened in this way, concerns about incorrect compensation values being generated and updated when an electric shock is applied during the process can be resolved.

According to the present invention, by dividing the entire line into an odd-numbered section line and an even-numbered section line, when performing RS, the time required for OFF-RS can be reduced to 1/2 compared to the existing time.

According to the present invention, by dividing the entire line into a first section line, a second section line, and a third section line, when performing RS, the time required for OFF-RS can be reduced to 1/3 compared to the existing time.

According to the present invention, the entire line is divided into an odd section line and an even section line, and when performing RS for each subpixel, the time required for OFF-RS can be shortened to 1/8 to 1/16 compared to the existing method.

According to the present invention, the entire line is divided into a first section line, a second section line, and a third section line, and when performing RS for each subpixel, the time required for OFF-RS is reduced to 1/12 to 1/12 compared to the existing method. It can be shortened to /24.

Figure 1 is a diagram for explaining an OFF-RS performance method of a conventional organic light emitting diode display device.
Figure 2 is a diagram showing an organic light emitting diode display device according to an embodiment of the present invention.
FIG. 3 is a diagram showing the circuit configuration of the pixel of FIG. 2.
Figures 4 and 5 are diagrams for explaining a method of performing OFF-RS in an organic light emitting diode display device according to an embodiment of the present invention.
6 and 7 are diagrams for explaining an OFF-RS performance method in an organic light emitting diode display device according to another embodiment of the present invention.
FIG. 8 is a diagram illustrating a lookup table for an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.
9A and 9B are diagrams for explaining an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.
FIG. 10 is a diagram illustrating a lookup table for an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.
11A and 11B are diagrams for explaining an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.
Figure 12 is a diagram for explaining an organic light emitting diode display device according to another embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the attached drawings.

Figure 2 is a diagram showing an organic light emitting diode display device according to an embodiment of the present invention. FIG. 3 is a diagram showing the circuit configuration of the pixel of FIG. 2. FIG. 3 shows an equivalent circuit of one pixel among external compensation pixels formed on the display panel.

Referring to FIG. 2, an organic light emitting diode display device according to an embodiment of the present invention may include a display panel 100, a scan driver 110, a data driver 120, and a timing controller 130.

In the display panel 100, a plurality of data lines (DL) and a plurality of scan lines (SL) intersect, and pixels (P) are arranged in a matrix form in each intersection area. Each of the pixels P is supplied with a high-potential driving voltage (VDD) and a low-potential driving voltage (VSS), and is connected to the data line (DL) and the scan line (SL).

Referring to FIG. 3, each pixel of the display panel includes an organic light emitting diode (OLED) that emits light by an input data current (Ioled) and a pixel circuit (PC) for driving the organic light emitting diode (OLED). Additionally, a plurality of lines are formed on the display panel to supply driving power and signals to the organic light emitting diode (OLED) and the pixel circuit (PC).

Here, the pixel circuit (PC) includes a first switching TFT (ST1), a second switching TFT (ST2), a driving TFT (DT), and a capacitor (Cst). And, the plurality of lines include a data line (DL), a gate line (GL), a driving power line (PL), a sense signal line (SL), and a reference power line (RL).

The first switching TFT (ST1) is switched according to a scan signal (gate driving signal) supplied to the gate line (GL). The first switching TFT (ST1) is turned on and the data voltage (Vdata) supplied to the data line (DL) is supplied to the driving TFT (DT).

The driving TFT (DT) is switched according to the data voltage (Vdata) supplied from the first switching transistor (ST1). The data current (Ioled) flowing to the organic light emitting diode (OLED) is controlled by switching of the driving TFT (DT).

When a scan signal is applied through the gate line (GL), the first switching TFT (ST1) is turned on, and at this time, the signal from the first switching TFT (ST1) is input to the gate electrode of the driving TFT (DT). and the driving TFT (DT) turns on. When the driving TFT (DT) is turned on, the driving current applied through the driving power line (PL) is input to the organic light emitting diode (OLED), causing the organic light emitting diode (OLED) to emit light.

For external compensation, a sense signal line (SL) is formed in the same direction as the gate line (GL). A second switching TFT (ST2) that switches according to the sense signal (sense) applied to the sense signal line (SL) is formed. The data current (Ioled) supplied to the organic light emitting diode (OLED) by switching of the second switching TFT (ST2) is sensed using the analog to digital converter (ADC) of the data drive IC. The data voltage supplied to each pixel is compensated according to the sensing value of each pixel sensed by the ADC to compensate for changes in the threshold voltage (Vth) and mobility characteristics of the driving TFT (DT).

The scan driver 110 is controlled by a scan control signal generated from the timing controller 130 and provides a scan signal to the scan line SL.

The data driver 120 converts the RGB data provided from the timing controller 130 into an analog data voltage and provides the converted data voltage to the data line DL.

The timing controller 130 writes data in the data driver 120 based on timing signals such as the vertical synchronization signal (Vsync), horizontal synchronization signal (Hsync), dot clock signal (DCLK), and data enable signal (DE). It is provided with a control unit 140 that generates a data control signal for controlling the timing and a scan control signal for controlling the operation timing of the scan driver 110.

The timing controller 130 performs RS by sensing the threshold voltage (Vth) and mobility (μ) of the control unit 140 and the driving thin film transistor (T1) provided in the pixel (P) of each display panel 100. Includes part 150.

The control unit 140 sorts RGB signals provided from an external system to the format of the display panel 100 and provides them to the data driver 120.

When performing OFF-RS (real time sensing), the RS performing unit 150 determines the threshold voltage (Vth) and mobility (mobility, μ) is sensed. Additionally, the RS performing unit 150 updates the lookup table 160 by calculating compensation data from the threshold voltage (Vth) and mobility (μ) of the sensed driving thin film transistor (T1).

At this time, when performing OFF-RS, the RS performing unit 150 does not sense the entire line one line each time, but divides the entire line into a plurality of sections and senses only the selected section lines when performing one RS to generate compensation data. By updating the lookup table 160, the time required for OFF-RS can be effectively shortened.

The compensation data calculated by the RS performing unit 150 and updated in the lookup table is provided to the control unit 140, and the control unit 140 generates control signals and data to which the newly calculated compensation data is applied. Data is provided to the data driver 120.

As described above, the organic light emitting diode display device according to the present invention calculates compensation data using the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor of the pixel to reduce the characteristic deviation of the driving thin film transistor between pixels. can be minimized.

4 and 5 are diagrams for explaining an OFF-RS performance method of an organic light emitting diode display device according to an embodiment of the present invention.

Referring to FIG. 4, the RS performing unit 150 of the organic light emitting diode display device according to an embodiment of the present invention performs each odd section line (lines 1, 3, and 5) of the display panel 100 at each RS. ), the driving thin film transistor (T1) for R, G, B, W for each pixel (P) for each line in turn for one section line among each even section line (2, 4, 6 lines...) Sensing the threshold voltage (Vth) and mobility (μ).

The RS performing unit 150 sequentially detects R sensed for each pixel (P) for each odd section line (line 1, 3, 5, etc.) and one section line among each even section line at each RS time. The threshold voltage (Vth) and mobility (μ) of the driving thin film transistors (T1) of G, B, and W are stored in the lookup table.

For this purpose, the lookup table includes a pixel data area for odd-numbered section lines and a pixel data area for even-numbered section lines.

Therefore, referring to FIG. 5, when performing the first RS, the RS performing unit 150 sequentially performs R, G for each odd section line (lines 1, 3, and 5) for each line and each pixel (P). , B, and W, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) are sensed and stored in the odd section line pixel data area of the lookup table (S1).

The control unit 140 applies a control signal that applies the compensation data stored in the odd-numbered section line pixel data area calculated when performing the first RS and updated in the lookup table, and the compensation data stored in the even-numbered section line pixel data area stored previously. And data is generated and the generated control signal and data are provided to the data driver 120 (S2).

Meanwhile, when performing the second RS, the RS performing unit 150 sequentially performs R, G, B, and W for each pixel (P) for each even section line (lines 2, 4, and 6). The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) are sensed and stored in the even-numbered line pixel data area of the lookup table (S3).

The control unit 140 generates a control signal that applies the compensation data stored in the even-numbered section line pixel data area calculated when performing the second RS and updated in the lookup table, and the compensation data stored in the odd-numbered section line pixel data area stored previously. And data is generated and the generated control signal and data are provided to the data driver 120 (S4).

Figures 6 and 7 are diagrams for explaining an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.

Referring to FIG. 6, the RS performing unit 150 of the organic light emitting diode display device according to another embodiment of the present invention includes the first section lines (lines 1, 4, 7...) of the display panel 100, Threshold voltage of the driving thin film transistor (T1) provided in the pixel (P) provided in the second section lines (lines 2, 5, 8...) and the third section lines (lines 3, 6, 9...) (Vth) and mobility (μ) can be sensed.

At this time, the RS performing unit 150 performs the first section line (lines 1, 4, 7...), the second section line (lines 2, 5, 8...), and the third section line (lines 2, 5, 8, etc.) each time RS is performed. 3, 6, 9 lines...), the threshold voltage (Vth) of the driving thin film transistor (T1) for R, G, B, W for each pixel (P) for each section line in turn, and Sensing mobility (μ).

When performing each RS, the RS performing unit 150 performs the first section line (lines 1, 4, 7...), the second section line (lines 2, 5, 8...), and the third section line (3, 6, 9 lines...), the threshold voltage (Vth) and movement of the driving thin film transistor (T1) of R, G, B, and W sensed for each pixel (P) for each line in turn for one section line Store mobility (μ) in the lookup table.

For this purpose, the lookup table includes a first section line pixel data area, a second section line pixel data area, and a third section line pixel data area.

Therefore, referring to FIG. 7, when performing the first RS, the RS performing unit 150 performs R, G, B, The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for W are sensed and stored in the first section line pixel data area of the lookup table (S11).

The control unit 140 includes compensation data stored in the first section line pixel data area calculated when performing the first RS and updated in the lookup table, compensation data stored in the second section line pixel data area stored before, and A control signal and data are generated by applying the compensation data stored in the third section line pixel data area, and the generated control signals and data are provided to the data driver 120 (S12).

Meanwhile, when performing the second RS, the RS performing unit 150 operates a driving thin film transistor for R, G, B, and W for each pixel (P) for the second section lines (lines 2, 5, and 8... The threshold voltage (Vth) and mobility (μ) of T1) are sensed and stored in the second section line pixel data area of the lookup table (S13).

The control unit 140 includes compensation data stored in the second section line pixel data area calculated when performing the second RS and updated in the lookup table, compensation data stored in the first section line pixel data area stored before, and A control signal and data are generated by applying the compensation data stored in the third section line pixel data area, and the generated control signal and data are provided to the data driver 120 (S14).

Next, when performing the third RS, the RS performing unit 150 operates the driving thin film transistor for R, G, B, and W for each pixel (P) for the third section line (lines 3, 6, and 9...). The threshold voltage (Vth) and mobility (μ) of (T1) are sensed and stored in the third section line pixel data area of the lookup table (S15).

The control unit 140 stores compensation data stored in the third section line pixel data area calculated when performing the third RS and updated in the lookup table, compensation data stored in the first section line pixel data area stored before, and A control signal and data are generated by applying the compensation data stored in the second section line pixel data area, and the generated control signal and data are provided to the data driver 120 (S16).

FIG. 8 is a diagram illustrating a lookup table for an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.

9A and 9B are diagrams for explaining an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.

Referring to FIG. 8, the RS performing unit 150 of the organic light emitting diode display according to an embodiment of the present invention performs each odd section line (lines 1, 3, and 5) of the display panel 100 at each RS. ), driving one subpixel selected among R, G, B, and W of each pixel (P) for each line in turn for one section line among each even section line (2, 4, 6 lines...) The threshold voltage (Vth) and mobility (μ) of the thin film transistor (T1) are sensed.

The RS performing unit 150 sequentially detects R sensed for each pixel (P) for each odd section line (line 1, 3, 5, etc.) and one section line among each even section line at each RS time. The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) of one of the G, B, and W subpixels are stored in a lookup table.

For this purpose, the lookup table includes a pixel data area for odd-numbered section lines and a pixel data area for even-numbered section lines.

Here, the odd section line pixel data area includes an R subpixel area, a G subpixel area, a B subpixel area, and a W subpixel area. The even section line pixel data area includes an R subpixel area, a G subpixel area, a B subpixel area, and a W subpixel area.

Therefore, referring to FIGS. 9A and 9B, when performing the first RS, the RS performing unit 150 sequentially performs pixel P for each odd section line (lines 1, 3, and 5). By sensing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for one subpixel (e.g., R subpixel) selected from R, G, B, and W, the odd number of the lookup table Each is stored in the corresponding subpixel area (for example, R subpixel area) of the section line pixel data area (S21).

The control unit 140 provides compensation data for the subpixel stored in the corresponding subpixel area (for example, R subpixel area) of the odd section line pixel data area calculated when performing the first RS and updated in the lookup table, and the corresponding subpixel. Applying the previously stored compensation data to other subpixel areas (e.g. G, B, W subpixel areas) excluding the area, and the compensation data stored in the even section line pixel data area previously saved. Control signals and data are generated and the generated control signals and data are provided to the data driver 120 (S22).

Meanwhile, when performing the second RS, the RS performing unit 150 sequentially selects R, G, B, and W of each pixel (P) for each even section line (lines 2, 4, and 6). By sensing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for one subpixel (e.g., R subpixel), the corresponding subpixel area of the even-numbered line pixel data area of the lookup table Store it in (for example, R subpixel area) (S23).

The control unit 140 provides compensation data for the subpixel stored in the corresponding subpixel area (for example, R subpixel area) of the even section line pixel data area calculated when performing the second RS and updated in the lookup table, and the corresponding subpixel. Control that applies the compensation data previously stored in subpixel areas other than the region (e.g. G, B, W subpixel areas) and the compensation data stored in the odd section line pixel data area previously stored. Signals and data are generated and the generated control signals and data are provided to the data driver 120 (S24).

When performing the third RS, the RS performing unit 150 sequentially performs one line selected from R, G, B, and W of each pixel (P) for each odd section line (lines 1, 3, and 5). By sensing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for a subpixel (e.g., G subpixel), the corresponding subpixel area ( For example, each is stored in the G subpixel area (S25).

The control unit 140 stores compensation data of the G subpixel stored in the corresponding subpixel area (for example, G subpixel area) of the odd section line pixel data area calculated when performing the third RS and updated in the lookup table, and the corresponding subpixel. Applying the previously stored compensation data to other subpixel areas (e.g. R, B, W subpixel areas) excluding the area, and the compensation data stored in the even section line pixel data area previously saved. Control signals and data are generated and the generated control signals and data are provided to the data driver 120 (S26).

On the other hand, when performing the fourth RS, the RS performing unit 150 sequentially selects R, G, B, and W of each pixel (P) for each even section line (lines 2, 4, and 6). By sensing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for one subpixel (e.g., G subpixel), the corresponding subpixel area of the even-numbered line pixel data area of the lookup table Store it in (for example, G subpixel area) (S27).

The control unit 140 generates compensation data for the G sub-pixel stored in the corresponding sub-pixel area (for example, G sub-pixel area) of the even section line pixel data area calculated when performing the fourth RS and updated in the look-up table, and the corresponding sub-pixel area. Compensation data previously stored in subpixel areas other than the pixel area (e.g., R, B, W subpixel areas) and compensation data previously stored in the odd section line pixel data area are applied. Control signals and data are generated and the generated control signals and data are provided to the data driver 120 (S28).

As described above, steps S21 and S22 become one set, and when performing the 5th RS, a compensation process is performed using the scanned compensation data after RS scanning in the B subpixel of the odd section line, and when performing the 6th RS, After RS scanning in the B subpixel of the even section line, a compensation process is performed using the scanned compensation data.

Similarly, when performing the 7th RS, the compensation process is performed using compensation data scanned after RS scanning in the W subpixel of the odd section line, and when performing the 8th RS, the compensation process is performed after RS scanning in the W subpixel of the even section line. The compensation process is performed using the received compensation data.

FIG. 10 is a diagram illustrating a lookup table for an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.

11A and 11B are diagrams for explaining an OFF-RS performance method of an organic light emitting diode display according to another embodiment of the present invention.

Referring to FIG. 10, the RS performing unit 150 of the organic light emitting diode display according to an embodiment of the present invention performs each odd section line (lines 1, 3, and 5) of the display panel 100 at each RS. ), driving one subpixel selected among R, G, B, and W of each pixel (P) for each line in turn for one section line among each even section line (2, 4, 6 lines...) The threshold voltage (Vth) and mobility (μ) of the thin film transistor (T1) are sensed.

At this time, when proceeding with odd section lines, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the R subpixel are sensed in line 1, and the driving thin film transistor (T1) for the G subpixel is sensed in line 3. The threshold voltage (Vth) and mobility (μ) of the transistor (T1) are sensed, and in line 5, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the B subpixel are sensed. In line 7, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the W subpixel are sensed, and in line 9, the driving thin film transistor (T1) for the R subpixel is sensed again. ), and in line 11, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the G subpixel are sensed. You can proceed with the sequence in this way.

The RS performing unit 150 sequentially detects R sensed for each pixel (P) for each odd section line (line 1, 3, 5, etc.) and one section line among each even section line at each RS time. The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) of one of the G, B, and W subpixels are stored in a lookup table.

For this purpose, the lookup table includes a pixel data area for odd-numbered section lines and a pixel data area for even-numbered section lines.

Here, the odd section line pixel data area includes an R subpixel area, a G subpixel area, a B subpixel area, and a W subpixel area. The even section line pixel data area includes an R subpixel area, a G subpixel area, a B subpixel area, and a W subpixel area.

Therefore, referring to FIGS. 11A and 11B, when performing the first RS, the RS performing unit 150 sequentially performs pixel P for each odd section line (lines 1, 3, and 5). By sensing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for one subpixel selected from R, G, B, and W, the corresponding sub in the odd section line pixel data area of the lookup table Each is stored in the pixel area (S31).

At this time, when proceeding with odd section lines, the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the R subpixel are sensed and stored in line 1, and the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the R subpixel are sensed and stored in line 3. The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) are sensed and stored, and in line 5, the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the B subpixel are sensed and stored. mobility, μ) is sensed and stored, in line 7, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the W subpixel are sensed and stored, and in line 9, the R subpixel is again sensed and stored. The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the pixel are sensed and stored, and in line 11, the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the G subpixel are sensed and stored. The order is carried out by sensing and storing the mobility (μ).

The control unit 140 stores compensation data for each subpixel stored in the corresponding subpixel area of the odd section line pixel data area calculated when performing the first RS and updated in the lookup table, and other subpixel areas excluding the corresponding subpixel area. In relation to this, control signals and data are generated by applying the previously stored compensation data and the previously stored compensation data stored in the even-numbered section line pixel data area, and the generated control signals and data are provided to the data driver 120. Do it (S32).

Meanwhile, when performing the second RS, the RS performing unit 150 sequentially selects R, G, B, and W of each pixel (P) for each even section line (lines 2, 4, and 6). By sensing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for one subpixel (e.g., R subpixel), the corresponding subpixel area of the even-numbered line pixel data area of the lookup table Store it in (for example, R subpixel area) (S33).

At this time, when proceeding with even-numbered sections, line 2 senses and stores the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the R subpixel, and in line 4, the threshold voltage (Vth) and mobility (mobility, μ) for the G subpixel are sensed and stored. The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) are sensed and stored, and in line 6, the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the B subpixel are sensed and stored. mobility, μ) is sensed and stored, in line 8, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the W subpixel are sensed and stored, and in line 10, the R sub pixel is again sensed and stored. The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the pixel are sensed and stored, and in line 12, the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the G subpixel are sensed and stored. The order is carried out by sensing and storing the mobility (μ).

The control unit 140 stores compensation data for each subpixel stored in the corresponding subpixel area of the even section line pixel data area calculated when performing the second RS and updated in the lookup table, and other subpixel areas excluding the corresponding subpixel area. Control signals and data are generated by applying the previously stored compensation data and the compensation data stored in the previously stored odd section line pixel data area, and the generated control signals and data are provided to the data driver 120. (S34).

When performing the third RS, the RS performing unit 150 performs the first RS in R, G, B, and W of each pixel (P) for each odd section line (lines 1, 3, and 5) in turn. By sensing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the next subpixel of the selected subpixel during execution, the corresponding subpixel in the odd section line pixel data area of the lookup table Store them in each area (S35). For example, when performing the first RS on the corresponding line, the R subpixel is selected, and when performing the third RS, the next sequence starts from the G subpixel.

For example, when performing odd section lines, the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the G subpixel are sensed and stored in line 1, and the B subpixel is sensed and stored in line 3. Sensing and storing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the The mobility (μ) is sensed and stored, and in line 7, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the R subpixel are sensed and stored, and in line 9, the The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the G subpixel are sensed and stored, and in line 11, the threshold voltage (Vth) of the driving thin film transistor (T1) for the B subpixel is sensed and stored. ) and mobility (μ) are sensed and stored to proceed with the sequence.

The control unit 140 calculates when performing the third RS and updates the lookup table for the compensation data of the subpixel stored in the corresponding subpixel area of the odd section line pixel data area and the subpixel area other than the corresponding subpixel area. Control signals and data are generated by applying the previously stored compensation data and the previously stored compensation data stored in the even section line pixel data area, and the generated control signals and data are provided to the data driver 120. (S36).

Meanwhile, when performing the fourth RS, the RS performing unit 150 sequentially performs operations in R, G, B, and W of each pixel (P) for each even-numbered section line (lines 2, 4, and 6...). 2 Sensing the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the next subpixel of the selected subpixel when performing RS, the corresponding line pixel data area of the even section of the lookup table Each is stored in the subpixel area (S37). For example, when performing the second RS on the corresponding line, the R subpixel is selected, but when performing the fourth RS, the next sequence starts from the G subpixel.

For example, when proceeding with an even section line, the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the G subpixel are sensed and stored in line 2, and the B subpixel is sensed and stored in line 4. Sensing and storing the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the The mobility (μ) is sensed and stored, and in line 8, the threshold voltage (Vth) and mobility (mobility, μ) of the driving thin film transistor (T1) for the R subpixel are sensed and stored, and in line 10, the The threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) for the G subpixel are sensed and stored, and in line 12, the threshold voltage (Vth) of the driving thin film transistor (T1) for the B subpixel is sensed and stored. ) and mobility (μ) are sensed and stored to proceed with the sequence.

The control unit 140 stores the compensation data of the subpixel stored in the corresponding subpixel area of the even section line pixel data area calculated when performing the fourth RS and updated in the lookup table, and the compensation data of the subpixel stored in the corresponding subpixel area except for the corresponding subpixel area. Control signals and data are generated by applying previously stored compensation data and compensation data stored in the previously stored odd section line pixel data area, and the generated control signals and data are provided to the data driver 120 ( S38).

As described above, steps S31 and S32 are a set, and when performing the 5th RS, starting from the B subpixel in the 1st line for odd section lines, performing RS scanning and then performing a compensation process using the scanned compensation data. , When performing the 6th RS, starting from the B subpixel in the 2nd line for the even-numbered section lines, the RS is scanned, and then the compensation process is performed using the scanned compensation data.

Similarly, when performing the 7th RS, a compensation process is performed using the scanned compensation data after RS scanning starting from the W subpixel in the first line for odd-numbered section lines, and when performing the 8th RS, the compensation process is performed for the even-numbered section lines. Starting from the W subpixel in the second line, RS is scanned, and then a compensation process is performed using the scanned compensation data.

Figure 12 is a diagram for explaining an organic light emitting diode display device according to another embodiment of the present invention.

12, the organic light emitting diode display 200 includes at least one controller 210 having, for example, a processor 214 and a memory 215, both coupled to a local interface 216. . Local interface 216 may include a data bus with an accompanying address/control bus or other bus structure, for example, as will be appreciated.

Memory 215 stores both data and various components that can be executed by processor 214. In particular, stored in memory 215 and executable by processor 214 may be sectional RS application 215a, and other potential applications. If any of the components discussed herein are implemented in the form of software, for example, C, C++, C#, Object C, Java, JavaScript, Perl, PHP, Visual Basic, Python, Ruby, Delphi, Flash, Or any one of a number of programming languages, such as another programming language, may be used.

A number of software components may be stored in memory 215 and executable by processor 214. In this respect, the term “executable” refers to a program file that is ultimately in a form that can be executed by processor 214. Examples of executable programs include, for example, a compiled program that can be loaded into a random access portion of memory 215 and translated into machine code in a format that can be executed by processor 214, generating instructions in the random access portion of memory 215 for execution by processor 214, or source code that can be expressed in a suitable format, such as object code, that can be loaded into the access portion and executed by processor 214; It may be source code that can be interpreted by another executable program. An executable program can be stored on, for example, random access memory (RAM), read-only memory (ROM), a hard drive, solid-state drive, USB flash drive, memory card, compact disk (CD), or digital versatile disk (DVD). It may be stored in any portion or component of memory 215, including an optical disk, floppy disk, magnetic tape, or other memory component.

Memory 215 is defined to include both volatile and non-volatile memory and data storage components.

A volatile component is one that does not retain its data value upon loss of power. Non-volatile components are what retain data in the event of power loss. Accordingly, memory 215 may include, for example, random access memory (RAM), read only memory (ROM), a hard disk drive, a solid state drive, a USB flash drive, a memory card accessed via a memory card reader, and an associated floppy disk. Includes a floppy disk accessed through a drive, an optical disk accessed through an optical disk drive, a magnetic tape accessed through an appropriate tape drive, and/or other memory components, or a combination of any two or more of these memory components. can do. Additionally, RAM may include, for example, static random access memory (SRAM), dynamic random access memory (DRAM), or magnetic random access memory (MRAM) and other such devices. ROM may include, for example, programmable read only memory (PROM), erasable programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), or other similar memory devices.

Additionally, the processor 214 may represent a plurality of processors 214 and the memory 215 may represent a plurality of memories 215 each operating in a parallel processing circuit. In this case, local interface 116 may be used to provide communication between any two of the number of processors 214, communication between any of the processors 214 and any of the memories 215, or any of the memories 215. It may be an appropriate network that facilitates communication between two. Local interface 216 may include additional systems designed to coordinate such communications, including, for example, performing load balancing. Processor 214 may be electrical or of some other possible configuration.

As noted above, the controller 210, and various other systems described herein, may be implemented in software or code executed by general-purpose hardware, but alternatively the same may be implemented in dedicated hardware, or in software/general-purpose hardware and dedicated hardware. It can also be implemented in combination. When implemented in dedicated hardware, each may be implemented as a circuit or state machine using any one or combination of several techniques. These techniques may include, but are not limited to, discrete logic circuits with logic gates for implementing multiple logic functions upon application of one or more data signals, custom integrated circuits with appropriate logic gates, or other components. there is. These techniques are generally well known to those skilled in the art and consequently are not described in detail herein.

The controller 210 may provide the memory 215 with a lookup table including a pixel data area for odd-numbered section lines and a pixel data area for even-numbered section lines to perform RS for each section as described in FIGS. 4 and 5 .

Therefore, when performing the first RS, the controller 210 sequentially operates the driving thin films for R, G, B, and W for each pixel (P) for each odd section line (lines 1, 3, and 5). The threshold voltage (Vth) and mobility (μ) of the transistor (T1) are sensed and stored in the odd section line pixel data area of the lookup table.

The controller 210 provides a control signal that applies the compensation data stored in the odd-numbered section line pixel data area calculated when performing the first RS and updated in the lookup table, and the compensation data stored in the even-numbered section line pixel data area stored previously. and data may be generated and the generated control signals and data may be provided to the display panel.

Meanwhile, when performing the second RS, the controller 210 operates the driving thin films for R, G, B, and W for each pixel (P) for each even section line (lines 2, 4, and 6) in turn. The threshold voltage (Vth) and mobility (μ) of the transistor (T1) are sensed and stored in the even-numbered line pixel data area of the lookup table.

The controller 210 provides a control signal that applies the compensation data stored in the even-numbered section line pixel data area calculated when performing the second RS and updated in the lookup table, and the compensation data stored in the odd-numbered section line pixel data area stored previously. and data may be generated and the generated control signals and data may be provided to the display panel.

Meanwhile, the controller 210 is provided with a lookup table in the memory 215 including a first section line pixel data area, a second section line pixel data area, and a third section line pixel data area, as shown in FIGS. 6 and 7. RS can be performed for each section as described in .

Therefore, when performing the first RS, the controller 210 drives the driving thin film transistor (T1) for R, G, B, and W for each pixel (P) for each first section line (lines 1, 4, and 7...). ) of the threshold voltage (Vth) and mobility (mobility, μ) are sensed and stored in the first section line pixel data area of the lookup table.

The controller 210 includes compensation data stored in the first section line pixel data area calculated when performing the first RS and updated in the lookup table, and compensation data stored in the second section line pixel data area stored previously, Control signals and data may be generated by applying compensation data stored in the third section line pixel data area, and the generated control signals and data may be provided to the display panel.

Meanwhile, when performing the second RS, the controller 210 drives the driving thin film transistor (T1) for R, G, B, and W for each pixel (P) for the second section lines (lines 2, 5, and 8...). The threshold voltage (Vth) and mobility (μ) are sensed and stored in the second section line pixel data area of the lookup table.

The controller 210 stores compensation data stored in the second section line pixel data area calculated when performing the second RS and updated in the lookup table, and compensation data stored in the first section line pixel data area stored before that, and Control signals and data may be generated by applying compensation data stored in the third section line pixel data area, and the generated control signals and data may be provided to the display panel.

When performing the third RS, the controller 210 sets the threshold of the driving thin film transistor (T1) for R, G, B, and W for each pixel (P) for the third section lines (lines 3, 6, and 9...). The voltage (Vth) and mobility (μ) are sensed and stored in the third section line pixel data area of the lookup table.

The controller 210 includes compensation data stored in the third section line pixel data area calculated when performing the third RS and updated in the lookup table, and compensation data stored in the first section line pixel data area stored before that, The control signal and data may be generated by applying the compensation data stored in the second section line pixel data area, and the generated control signal and data may be provided to the display panel.

Likewise, the controller 210 is provided with a lookup table in the memory 215 including a first section line pixel data area, a second section line pixel data area, and a third section line pixel data area, as shown in FIGS. 8 and 9A. And the RS for each section described in FIG. 9b can be performed.

Likewise, the controller 210 is provided with a lookup table in the memory 215 including a first section line pixel data area, a second section line pixel data area, and a third section line pixel data area, as shown in FIGS. 10 and 11A. And the RS for each section described in FIG. 11b can be performed.

When the functions and implementation operations of some of the above-described controller 210 are implemented in software, each function and implementation operation is a module, segment, or part of code containing program instructions that implement the specified logical function(s). can represent. Program instructions may be in the form of source code containing human-readable statements written in a programming language, or machine code containing numerical instructions recognizable by a suitable execution system, such as processor 214 in a computer system or other system. It can be implemented. Machine code can be converted from source code, etc. When implemented in hardware, each block may represent a circuit or multiple interconnected circuits to implement a specified logical function(s).

Additionally, any logic or application described herein, including the section-by-section RS application 215a comprising software or code, may be integrated into an instruction execution system, e.g., processor 214 of a computer system or other system. It may be embodied in any non-transitory computer-readable medium for use or in connection therewith. In this sense, logic may include statements, including instructions and declarations, that can be fetched, for example, from a computer-readable medium and executed by an instruction execution system. In the context of this disclosure, a “computer-readable medium” may be any medium that can contain, store, or retain the logic or program described herein for use in or in connection with an instruction execution system. Computer-readable media may include any of a number of physical media, such as, for example, magnetic, optical, or semiconductor media.

More specific examples of suitable computer-readable media include, but are not limited to, magnetic tapes, magnetic floppy diskettes, magnetic hard drives, memory cards, solid state drives, USB flash drives, or optical disks. Additionally, the computer-readable medium may be random access memory (RAM), including, for example, static random access memory (SRAM), dynamic random access memory (DRAM), or magnetic random access memory (MRAM). Computer-readable media may also include read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or other types of memory. It may be a memory device.

Although embodiments according to the present invention have been described above, they are merely illustrative, and those skilled in the art will understand that various modifications and equivalent scope of embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the following patent claims.

Claims (13)

selecting the entire horizontal line of the display panel on which OFF-RS (real time sensing) is to be performed and dividing it into a plurality of distinct sections; and
When performing one RS, only the selected section lines are sensed to calculate compensation data, the calculated compensation data is updated in the lookup table, and the updated compensation data is applied to the lookup table for the selected section lines, For other section lines, it includes generating control signals and data applying previously stored compensation data and providing them to the data driver,
The step of dividing into the plurality of sections is,
The entire horizontal line of the display panel is selected and divided into odd section lines and even section lines, or first section lines (lines 1, 4, 7...) and second section lines (lines 2, 5, 8. ..), selected and divided into the third section lines (lines 3, 6, 9...),
The first section line starts from the first line and corresponds to every three lines, the second section line starts from the second line and corresponds to every three lines, and the third section line starts from the third line and corresponds to every three lines. OFF-RS performance method for each corresponding organic light emitting diode display device.
The method of claim 1, wherein generating the control signal and data and providing them to a data driver comprises:
When performing the first RS, the compensation data calculated through sensing of the R, G, B, and W subpixels for each odd section line for each pixel in turn is stored in the odd section line pixel data area of the lookup table. Steps to update;
Generating and providing control signals and data to a data driver by applying compensation data stored in an odd section line pixel data area updated in the lookup table and compensation data stored in an even section line pixel data area previously stored;
When performing the second RS, compensation data calculated through sensing of R, G, B, and W sub-pixels for each even-numbered section line in order for each line and each pixel is stored and updated in the even-numbered line pixel data area of the lookup table. steps; and
Generating and providing control signals and data to the data driver by applying compensation data stored in the even-numbered section line pixel data area updated in the lookup table and compensation data stored in the odd-numbered section line pixel data area previously stored. OFF-RS performance method of an organic light emitting diode display device comprising a.
According to claim 1,
The step of dividing into the plurality of sections is,
The entire horizontal line of the display panel is divided into first section lines (lines 1, 4, 7...), second section lines (lines 2, 5, 8...), and third section lines (3, 6, 9). Separated by lines...),
The step of generating the control signal and data and providing them to the data driver,
When performing the first RS, storing compensation data calculated through sensing of R, G, B, and W subpixels for each pixel for each first section line in the first section line pixel data area of the lookup table;
Compensation data stored in the first section line pixel data area updated in the lookup table, compensation data stored in the previously stored second section line pixel data area, and compensation data stored in the third section line pixel data area An OFF-RS performance method for an organic light emitting diode display device comprising the step of generating applied control signals and data and providing the generated control signals and data to the data driver.
According to clause 3,
The step of generating the control signal and data and providing them to the data driver,
When performing the second RS, storing and updating compensation data calculated through sensing in the R, G, B, and W subpixels for each pixel for the second section line in the second section line pixel data area of the lookup table. ; and
Compensation data stored in the second section line pixel data area updated in the lookup table, compensation data stored in the previously stored first section line pixel data area, and compensation data stored in the third section line pixel data area An OFF-RS performance method for an organic light emitting diode display device further comprising generating applied control signals and data and providing them to the data driver.
According to clause 4,
The step of generating the control signal and data and providing them to the data driver,
When performing the third RS, storing compensation data calculated through sensing of R, G, B, and W subpixels for each pixel for the third section line in the third section line pixel data area of the lookup table. ;
Compensation data stored in the third section line pixel data area updated in the lookup table, compensation data stored in the previously stored first section line pixel data area, and compensation data stored in the second section line pixel data area An OFF-RS performance method for an organic light emitting diode display device further comprising generating a control signal and data applied and providing them to the data driver.
According to paragraph 1.
The step of generating the control signal and data and providing them to the data driver,
When performing the first RS, the compensation data calculated through sensing of one subpixel selected among the R, G, B, and W subpixels of each pixel for each odd section line is sequentially applied to the odd section line of the lookup table. Storing each in the corresponding subpixel area of the pixel data area; and
Compensation data for the subpixel stored in the corresponding subpixel area of the odd section line pixel data area updated in the lookup table, compensation data previously stored for other subpixel areas excluding the corresponding subpixel area, and compensation data previously stored for the subpixel area other than the corresponding subpixel area. An OFF-RS performance method of an organic light emitting diode display device comprising generating a control signal and data applying compensation data stored in an even section line pixel data area stored in and providing the control signal and data to the data driver.
According to clause 6,
The step of generating the control signal and data and providing them to the data driver,
When performing the second RS, compensation data calculated through sensing of one subpixel selected among the R, G, B, and W subpixels of each pixel for each even-numbered section line is sequentially applied to the even-numbered line of the lookup table. Updating by storing in a corresponding sub-pixel area of the pixel data area;
Sub-pixel compensation data stored in the corresponding sub-pixel area of the even section line pixel data area updated in the look-up table, compensation data previously stored in other sub-pixel areas excluding the corresponding sub-pixel area, and previously An OFF-RS performance method for an organic light emitting diode display further comprising generating a control signal and data applying compensation data stored in an odd section line pixel data area and providing the control signal and data to the data driver.
According to claim 1,
The step of generating the control signal and data and providing them to the data driver,
When performing the first RS, it is calculated through sensing of one subpixel selected among the R, G, B, and W subpixels of each pixel for each odd section line (lines 1, 3, and 5) in turn. Comprising the step of storing and updating the compensated data in the corresponding subpixel area of the odd section line pixel data area of the lookup table,
When performing odd section lines, sensing is performed on the R subpixel in line 1, sensing is performed on the G subpixel in line 3, sensing is performed on the B subpixel in line 5, and sensing is performed on the W subpixel in line 7. An OFF-RS performance method of an organic light emitting diode display device, characterized in that sensing is performed on a pixel, sensing is again performed on an R subpixel on line 9, and sensing is performed on a G subpixel on line 11.
According to clause 8,
The step of generating the control signal and data and providing them to the data driver,
When performing the second RS, it is calculated through sensing of one subpixel selected among the R, G, B, and W subpixels of each pixel for each even section line (lines 2, 4, and 6) in turn. Comprising the step of storing and updating the compensated data in the corresponding sub-pixel area of the even-numbered section line pixel data area of the lookup table,
When proceeding with an even section line, sensing is performed on the R subpixel in line 2, sensing is performed on the G subpixel in line 4, sensing is performed on the B subpixel in line 6, and sensing is performed on the W subpixel in line 8. An OFF-RS performance method of an organic light emitting diode display device, characterized in that sensing is performed on a pixel, sensing is again performed on an R subpixel on line 10, and sensing is performed on a G subpixel on line 11.
According to clause 9,
The step of generating the control signal and data and providing them to the data driver,
When performing the 3rd RS, it is calculated through sensing of one subpixel selected among the R, G, B, and W subpixels of each pixel for each odd section line (lines 1, 3, and 5) in turn. Comprising the step of storing and updating the compensated data in the corresponding subpixel area of the odd section line pixel data area of the lookup table,
For each odd-numbered section line, the compensation data calculated by sensing the subpixel next to the subpixel selected when performing the first RS is looked up in the R, G, B, and W subpixels of each pixel for each line in turn. A method of performing OFF-RS in an organic light emitting diode display device that stores and updates each sub-pixel area of the odd section line pixel data area of a table.
According to claim 10,
The step of generating the control signal and data and providing them to the data driver,
When performing the fourth RS, the compensation data calculated through sensing of one subpixel selected among the R, G, B, and W subpixels of each pixel for each even section line is sequentially applied to the odd section line of the lookup table. Including the step of storing and updating each in the corresponding sub-pixel area of the pixel data area,
For each even-numbered section line, the compensation data calculated through sensing of the subpixel next to the subpixel selected when performing the second RS is looked up in the R, G, B, and W subpixels of each pixel for each line in turn. A method of performing OFF-RS in an organic light-emitting diode display device that stores and updates each sub-pixel area of the even-numbered section line pixel data area of the table.
a display panel in which a plurality of data lines and a plurality of gate lines intersect and pixels including a driving transistor and an organic light emitting diode are arranged in each intersection area;
a data driver providing data signals to the plurality of data lines;
a scan driver providing scan signals to the plurality of gate lines;
The entire horizontal line of the display panel is divided into a plurality of sections by selecting each section, and when performing one RS, only the selected section lines are sensed to calculate compensation data and update the lookup table to OFF-RS. RS execution unit that performs (real time sensing); and
Controlling the data driver and scan driver, applying compensation data calculated by the RS execution unit and updated to the lookup table to selected section lines, and applying previously stored compensation data to other section lines. It includes a control unit that generates signals and data and provides them to the data driver,
The RS performing unit selects and divides the entire horizontal line of the display panel into odd-numbered section lines and even-numbered section lines, or divides them into first section lines (lines 1, 4, 7...) and second section lines (2, 5, 8 lines...), and the third section line (3, 6, 9 lines...)
The first section line starts from the first line and corresponds to every three lines, the second section line starts from the second line and corresponds to every three lines, and the third section line starts from the third line and corresponds to every three lines. Each corresponding organic light emitting diode display device.
The method of claim 12, wherein the RS performing unit senses the threshold voltage and mobility of the driving thin film transistor provided in the pixel of the display panel when performing OFF-RS, and calculates the threshold voltage and mobility from the sensed threshold voltage and mobility of the driving thin film transistor. An organic light emitting diode display device that updates the lookup table by calculating the compensation data.

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