KR102613410B1 - Organic Light Emitting Diode display apparatus, timing controller and method for correcting real time sensing data thereof - Google Patents

Abstract

By applying the present invention, it is possible to detect abnormal RS data and correct it to normal data when performing OFF-RS (real time sensing) in an organic light emitting diode display device, thus preventing the occurrence of RS data attributable defects in advance. You can. Therefore, OFF-RS uses AC power (standby power) to perform sensing, and while the AC power is being compensated, the AC power is turned off. As a result, normal RS data cannot be stored in the memory due to external electric shock, and abnormal RS data is stored in the memory. Since it is possible to detect the occurrence of abnormal RS data in advance in a situation where it can be stored, it is possible to block abnormal RS data from being stored in the memory.

Description

Organic light emitting diode display apparatus, timing controller and method for correcting real time sensing data thereof}

The present invention relates to an organic light emitting diode display device, a timing controller thereof, and a method for correcting RS data, and more specifically, to determine whether abnormal RS data is generated when performing OFF-RS (real time sensing) in an organic light emitting diode display device. It relates to an organic light emitting diode display device that detects and corrects to normal RS data using OFF-RS data previously stored for each pixel or block, a timing controller for the same, and a method for correcting the RS data.

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 deviation in the electrical characteristics of the driving TFT between pixels, a method of sensing the threshold voltage (Vth) of the driving TFT between pixels in a timing controller 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 the threshold voltage of the driving TFT when powered off to provide the same image 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 threshold voltage value for each pixel of the entire screen when the screen is turned off.

However, the method of receiving feedback from the voltage value of the organic light emitting diode device of each pixel and providing compensation in the timing controller has the following problems.

Since the voltage value fed back from the organic light emitting diode device of each pixel has a small value of less than 10 mV, it responds sensitively to the noise of the sensing line that receives the voltage feedback from the organic light emitting diode device of each pixel. .

Because of this, when the feedback received data includes noise values, there is a problem that abnormal data is compensated due to deterioration of the organic light emitting diode device.

In the conventional case, when performing OFF-RS, compensation is performed when the OLED TV recognizes the power OFF command. Disadvantages may arise in terms of driving and compensation.

First, in terms of driving, OFF-RS uses AC power (standby power) to perform sensing, so if AC power is turned off during compensation, normal RS data cannot be stored in the memory due to external electric shock and abnormal RS data is lost. Data can be stored. If abnormal RS data is stored in memory, it may cause screen abnormalities and even defects. In this way, defects occurring on the screen by storing abnormal RS data in memory and performing compensation with the abnormal RS data are called RS data-attributable defects.

Conventionally, when an RS-related defect occurs, there is no way to solve the RS data-related defect on the OLED TV itself. Therefore, users who purchased an OLED TV contact the A/S center and have A/C arranged by an employee. The only solution is to visit the site to recover damaged data or replace parts.

In addition, in the case of the conventional OFF-RS, there is a problem in that it is vulnerable to RS data attribution defects because there is no logic for detecting abnormal RS data and compensating for normal data. Therefore, a method is needed to prevent or resolve RS data-related defects in OLED TVs.

The problem that the present invention aims to solve is to detect whether abnormal RS data occurs when performing OFF-RS (real time sensing) in an organic light emitting diode display device, and to detect OFF-RS data pre-stored for each pixel or block. The purpose of the present invention is to provide an organic light emitting diode display device that is used to correct normal RS data, its timing controller, and a method for correcting the RS data.

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.

According to one aspect of the present invention, a method for correcting RS data of an organic light emitting diode display device is provided. According to this method, real time sensing (RS) is performed on each pixel of the display panel of the organic light emitting diode display device. Next, a step of performing RS based on an RS database storing RS data for each pixel and checking whether the first RS data calculated through compensation is within a preset effective range is performed. As a result of the inspection, if it is within a preset effective range, the corresponding first RS data is stored, and if it is not within the effective range, the preset corrected RS data is stored in the non-volatile memory as second RS data. The second RS data stored in the non-volatile memory is stored in the high-speed memory. Control signals and data are generated by applying the second RS data stored in the high-speed memory 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 scan driver, and a timing controller. In the display panel, a plurality of data lines and a plurality of gate lines intersect, and pixels equipped with a driving transistor and an organic light-emitting diode are arranged in each intersection area. The data driver provides data signals through multiple data lines, and the scan driver provides scan signals through the data driver and multiple gate lines. The timing controller performs RS for each pixel of the display panel based on the RS database and calculates first RS data through compensation. The timing controller has an RS database that stores RS data for each pixel. The timing controller determines whether the calculated first RS data is in a valid range based on the RS database. If the determination result is not within the effective range, the timing controller stores the preset correction RS data as second RS data in the non-volatile memory. The timing controller generates control signals and data based on the corrected second RS data and provides them to the data driver.

According to the present invention, when performing OFF-RS (real time sensing) in an organic light emitting diode display device, abnormal RS data can be detected and corrected to normal data, thereby preventing RS data attributable defects from occurring in advance. You can.

Therefore, OFF-RS uses AC power (standby power) to perform sensing, and while the AC power is being compensated, the AC power is turned off. As a result, normal RS data cannot be stored in the memory due to external electric shock, and abnormal RS data is stored in the memory. Since it is possible to detect the occurrence of abnormal RS data in advance in a situation where it can be stored, it is possible to block abnormal RS data from being stored in the memory.

In addition, stable screen operation is possible by correcting with pre-stored normal RS data, so users who purchase OLED TV contact the A/S center and have the A/C staff visit to repair the damaged data. It is possible to prevent or solve problems on your own without going through procedures to repair or replace parts.

1 is a diagram showing an organic light emitting diode display device according to an embodiment of the present invention.
FIG. 2 is a diagram showing the circuit configuration of the pixel of FIG. 1.
FIG. 3 is a diagram illustrating a method for correcting RS data of an organic light emitting diode display device according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating a method for correcting RS data of an organic light emitting diode display device according to an embodiment of the present invention.
Figure 5 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.

1 is a diagram showing an organic light emitting diode display device according to an embodiment of the present invention. FIG. 2 is a diagram showing the circuit configuration of the pixel of FIG. 1. FIG. 2 shows an equivalent circuit of one pixel among external compensation pixels formed on the display panel.

Referring to FIG. 1, the organic light emitting diode display device 100 according to an embodiment of the present invention may include a display panel 110, a scan driver 120, a data driver 130, and a timing controller 140. You can.

In the display panel 110, 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. 2, 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 120 is controlled by a scan control signal generated from the timing controller 140 and provides a scan signal to the scan line SL.

The data driver 130 converts the RGB data provided from the timing controller 140 into an analog data voltage and provides the converted data voltage to the data line DL.

The timing controller 140 writes data in the data driver 130 based on timing signals such as the vertical synchronization signal (Vsync), horizontal synchronization signal (Hsync), dot clock signal (DCLK), and data enable signal (DE). A data control signal for controlling the timing and a scan control signal for controlling the operation timing of the scan driver 120 are generated.

The timing controller 140 performs RS on each pixel of the display panel 110 based on the RS database storing RS data for each pixel, and if the calculated first RS data is not within the effective range, preset correction is performed. The RS data is stored as second RS data in the non-volatile memory, and the timing controller 140 can generate control signals and data based on the second RS data stored in the non-volatile memory and provide them to the data driver 130. there is. To this end, the timing controller 140 may include a data storage unit 141, an RS data calculation unit 142, an RS data correction unit 143, and a control unit 144. To this end, the timing controller 140 may include a data storage unit 141, an RS data calculation unit 142, an RS data correction unit 143, and a control unit 144.

The data storage unit 141 may include a first data storage unit 141a, a second data storage unit 141b, and a third data storage unit 141c.

The first data storage unit 141a stores RS database information for each pixel. RS database information can be used to determine whether the RS data calculated by the RS data calculation unit 142 is normal data.

For this purpose, the RS database can accumulate and store RS data for each pixel. As another example, the RS database can accumulate and store RS data for each pixel for each block. Here, a block refers to grouping a plurality of pixels adjacent to each other in the display panel 110 into one unit. Accordingly, the RS database can be updated by accumulating average RS data calculated from a plurality of pixels included in each block for each block.

In addition, if any first RS data calculated by the RS data calculation unit 142 is not within a preset effective range, the first data storage unit 141a replaces the calculated corresponding RS data with the second data storage unit 141b. ) is storing preset correction RS data to be saved in .

The second data storage unit 141b stores RS data corrected by the correction operation of the RS data correction unit 143 with respect to the first RS data calculated by the RS data calculation unit 142 as second RS data. there is. Accordingly, if any first RS data calculated by the RS data calculation unit 142 is within a preset effective range, the first RS data is stored as second RS data in the second data storage unit 141b. However, if any first RS data calculated by the RS data calculation unit 142 is not within a preset valid range, the preset corrected RS data is stored as second RS data. For this purpose, the second data storage unit 141b may be a non-volatile memory. For example, it may be NAND memory.

The third data storage unit 141c is a high-speed memory. For example, it could be DDR memory. The third data storage unit 141c stores the second RS data read from the second data storage unit 141b by the RS data loading operation of the control unit 144.

The RS data calculation unit 142 performs OFF-RS (real time sensing) and calculates RS data through compensation. To this end, the RS data calculation unit 142 determines the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) provided in the pixel (P) of the display panel 110 when OFF-RS is performed. ) and calculate RS data through compensation based on the sensing data obtained by sensing.

The RS data correction unit 143 accumulates RS data for each pixel in the RS database.

The RS data correction unit 143 groups the RS data for each pixel into an RS database, groups a plurality of adjacent pixels into each block, and accumulates the average RS data calculated from the plurality of pixels included in each block for each block. You can.

The RS data correction unit 143 updates the RS database every time OFF-RS is performed. This updated RS database is used to determine the validity of the RS data calculated by the RS data calculation unit 142 when performing the next OFF-RS. At this time, because the RS database is updated every time OFF-RS is performed, RS data is accumulated as history for each pixel or each block. Therefore, the RS database accumulated for each pixel or each block typically has a Gaussian probability distribution.

The RS data correction unit 143 performs RS based on an RS database storing RS data for each pixel and checks whether the RS data calculated through compensation is within a preset effective range.

To this end, the RS data correction unit 143 can inspect the RS data for each pixel stored in the RS database using a Gaussian model.

As a result of the inspection, if it is within a preset effective range, the RS data correction unit 143 determines the RS data to be normal RS data and stores it in the second data storage unit 141b, which is a non-volatile memory. Here, the preset effective range may be determined to be within the effective range if it exists within the Lower Specification Limit (LSU) and Upper Specification Limit (USL) ranges, for example, using a Gaussian model.

Meanwhile, if the test result is not within the preset effective range, the RS data correction unit 143 determines that the first RS data is abnormal RS data, and replaces the preset corrected RS data in this case with a non-volatile memory. 2 Stored as second RS data in the memory storage unit 141b.

Here, the preset corrected RS data may be set to the average value of the Gaussian model of the RS data for each pixel stored in the RS database. At this time, as the correction RS data is formed for each pixel or each block, it includes a plurality of correction data rather than a single correction RS data. In general, since the corresponding correction data shows a Gaussian distribution, it is desirable to use a multimodal Gaussian probability model.

Meanwhile, the RS data correction unit 143 performs RS on each pixel by the RS data calculation unit 142, and if the RS data calculated through compensation is not within a preset effective range, the RS data is converted into first data. It is stored separately in the storage unit 141a.

Here, if the RS data correction unit 143 is not within a preset effective range, the corresponding RS data is separately stored in order to avoid excluding the possibility that it may actually be normal RS data.

That is, changes may occur in the installation environment of the organic light emitting diode display device 100. In this case, it is normal for a difference to occur between the RS data previously stored in the RS database and the RS data actually calculated by the RS data calculation unit 142.

Therefore, if the number of times the RS data calculated by the RS data calculation unit 142 is not within the preset effective range is accumulated and repeated, there is a possibility that a change has occurred in the installation environment of the organic light emitting diode display device 100. You can.

To this end, when the cumulative number of times that the RS data calculated by the RS data calculation unit 142 is not within the preset valid range exceeds the standard value, the first data storage unit 141a You can start building a new RS database stored in .

The RS data correction unit 143 builds a new RS database including the RS data separately stored in the first data storage unit 141a, and when the RS database construction is completed, the RS data base is previously stored in the first data storage unit 141a. ) replace the RS database stored in the RS database with a newly constructed RS database.

The control unit 144 sorts the RGB signals provided from an external system to the format of the display panel 110 and provides them to the data driver 130.

Meanwhile, the control unit 144 reads the RS data corrected by the RS data correction unit 142 and stored in the second data storage unit 141b, generates control signals and data accordingly, and sends them to the data driver 130. to provide.

To this end, the control unit 144 reads the second RS data stored in the second data storage unit 141b, which is a non-volatile memory, and stores it in the third data storage unit 141c, which is a high-speed memory. High-speed memory has the characteristic of being able to be accessed quickly from the control unit 144 and is volatile memory. Therefore, it refers to a state in which the second RS data is stored to enable high-speed access to the third data storage unit 141c, which is a high-speed memory, and systematically means that the second RS data is loaded in the third data storage unit 141c. It is also expressed.

The control unit 144 generates control signals and data applying the second RS data stored in the third data storage unit 141c and provides them to the data driver.

3 and 4 are diagrams for explaining a RS data correction method of an organic light emitting diode display device according to an embodiment of the present invention.

Referring to FIG. 3, RS database information and corrected RS data for each pixel are stored in the first data storage unit 141a (S1).

The RS database may be stored by accumulating RS data for each pixel for each pixel, or may be stored by accumulating RS data for each pixel for each block.

The corrected RS data is preset to be stored in the second data storage unit 141b to replace the corresponding RS data calculated when any RS data calculated by the RS data calculation unit 142 is not within the preset effective range. This is RS data.

For example, the corrected RS data may be set to the average value of the Gaussian model of the RS data for each pixel stored in the RS database. At this time, as the correction RS data is formed for each pixel or each block, it includes a plurality of correction data rather than a single correction RS data. In general, since the corresponding correction data shows a Gaussian distribution, it is desirable to use a multimodal Gaussian probability model.

When the OFF-RS execution condition is met, the RS data calculation unit 142 performs OFF-RS (real time sensing) and calculates first RS data through compensation (S2).

To this end, the RS data calculation unit 142 determines the threshold voltage (Vth) and mobility (μ) of the driving thin film transistor (T1) provided in the pixel (P) of the display panel 110 when OFF-RS is performed. ) and calculate RS data through compensation based on the sensing data obtained by sensing.

The RS data correction unit 143 performs RS based on an RS database storing RS data for each pixel and checks whether the first RS data calculated through compensation is within a preset effective range (S3).

Here, the RS data correction unit 143 can inspect the RS data for each pixel stored in the RS database using a Gaussian model.

As a result of the inspection, if it is within the preset effective range, the RS data correction unit 143 determines the first RS data to be normal RS data and stores it as the second RS data in the second data storage unit 141b, which is a non-volatile memory ( S4).

Meanwhile, if the test result is not within the preset effective range, the RS data correction unit 143 determines that the first RS data is abnormal RS data, and replaces the preset corrected RS data in a non-volatile memory in this case. 2 Store it as second RS data in the memory storage unit 141b (S5).

The control unit 144 reads the second RS data stored in the second data storage unit 141b, which is a non-volatile memory, and stores it in the third data storage unit 141c, which is a high-speed memory (S6).

The control unit 144 generates a control signal and data applying the second RS data stored in the third data storage unit 141c and provides them to the data driver (S7).

Referring to FIG. 4, each time RS is performed, the RS data correction unit 143 accumulates and updates the second RS data stored in the second data storage unit 141b for each pixel in the RS database (S8).

Meanwhile, the RS data correction unit 143 performs RS on each pixel by the RS data calculation unit 142, and if the first RS data calculated through compensation is not within a preset effective range, the corresponding first RS data These are separately stored as third RS data in the first data storage unit 141a (S9).

The RS data correction unit 143 determines whether the accumulated number of times that the first RS data calculated by the RS data calculation unit 142 is not within a preset effective range exceeds the reference value (S10).

As a result of the determination, if the cumulative number of times that the first RS data calculated by the RS data calculation unit 142 is not within the preset effective range exceeds the standard value, the RS data correction unit 143 is configured to operate the first data storage unit ( A new RS database is constructed including the third RS data separately stored in 141a) (S11).

When the construction of a new RS database including the third RS data separately stored in the first data storage unit 141a is completed, the RS data correction unit 143 stores the data previously stored in the first data storage unit 141a. Replace the existing RS database with a newly constructed RS database (S12).

The RS data correction unit 143 applies the third RS data when performing the next OFF-RS and determines whether the first RS data is within a preset effective range based on the updated RS database.

Figure 5 is a diagram for explaining an organic light emitting diode display device according to another embodiment of the present invention.

5, 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 RS data correction 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 216 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 performs real time sensing (RS) on each pixel of the display panel of the organic light emitting diode display device and calculates first RS data through compensation.

The controller 210 performs RS based on an RS database storing RS data for each pixel and checks whether the first RS data calculated through compensation is within a preset effective range.

As a result of the test, if it is within the preset effective range, the controller 210 stores the first RS data as second RS data in the non-volatile memory. If it is not within the effective range, the controller 210 stores the preset corrected RS data as second RS data in the non-volatile memory.

The controller 210 reads the second RS data stored in the non-volatile memory and stores it in the high-speed memory.

The controller 210 may generate control signals and data using the second RS data stored in the high-speed memory and provide them to the data driver.

Each time RS is performed, the controller 210 may accumulate and update the second RS data stored in the non-volatile memory for each pixel in the RS database.

Each time RS is performed, the controller 210 groups a plurality of adjacent pixels into each block and updates the average RS data calculated from the plurality of pixels included in each block by accumulating them in the RS database for each block. You can.

When checking whether the calculated RS data is within a preset effective range, the controller 210 may use a Gaussian model of the RS data for each pixel stored in the RS database.

The controller 210 may use the average value of the Gaussian model of the RS data for each pixel stored in the RS database as the preset corrected RS data.

If the calculated first RS data is not within a preset valid range, the controller 210 may store the corresponding first RS data as third RS data. If the accumulated number of times that the calculated first RS data is not within a preset valid range exceeds the standard value, the controller 210 may update the RS database by applying the third RS data.

When checking whether the calculated RS data is within a preset effective range, the controller 210 applies the third RS data to determine whether the first RS data calculated based on the updated RS database is within the preset effective range. You can check whether or not.

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 RS data correction application 215a, comprising software or code, may be implemented in 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 (14)

Performing real time sensing (RS) on each pixel of a display panel of an organic light emitting diode display device and calculating first RS data through compensation;
performing the RS based on an RS database storing RS data for each pixel and checking whether first RS data calculated through compensation is within a preset effective range;
As a result of the inspection, if it is within a preset effective range, storing the first RS data as second RS data in a non-volatile memory; if it is not within the effective range, storing the preset corrected RS data as second RS data;
reading second RS data stored in the non-volatile memory and storing it in a high-speed memory; and
generating control signals and data applying the second RS data stored in the high-speed memory and providing them to a data driver; Including,
The step of checking whether the calculated RS data is within a preset effective range is:
The RS data for each pixel stored in the RS database is inspected using a Gaussian model,
The preset correction RS data is an average value of a Gaussian model of RS data for each pixel stored in the RS database.
delete delete The RS data of an organic light emitting diode display device according to claim 1, further comprising the step of accumulating and updating the second RS data stored in the non-volatile memory for each pixel in the RS database each time the RS is performed. How to calibrate.
According to paragraph 1,
Each time the RS is performed, a plurality of adjacent pixels are grouped into each block, and the average RS data calculated from the plurality of pixels included in each block is accumulated and updated in the RS database for each block. RS data correction method for an organic light emitting diode display device comprising:
delete delete According to claim 1,
If the calculated first RS data is not within a preset effective range, storing the first RS data as third RS data;
When the accumulated number of times that the calculated first RS data is not within a preset effective range exceeds a reference value, updating the RS database by applying the third RS data. RS data correction method.
The method of claim 8, wherein the step of checking whether the calculated RS data is within a preset effective range includes:
An RS data correction method for an organic light emitting diode display device that checks whether the calculated first RS data is within a preset effective range based on an RS database updated by applying the third RS data.
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; and
Based on the RS database storing RS data for each pixel, if the first RS data calculated by performing RS on each pixel of the display panel is not within the valid range, preset corrected RS data is stored in the non-volatile memory. 2 RS data, and a timing controller that generates control signals and data based on the second RS data stored in the non-volatile memory and provides them to the data driver,
The timing controller is,
an RS data calculation unit that performs real time sensing (RS) for each pixel of the display panel and calculates RS data through compensation;
Based on the RS database storing RS data for each pixel, it is checked whether the calculated first RS data is within a preset effective range, and if the test result is within the preset effective range, the corresponding first RS data is valid. an RS data correction unit that stores preset correction RS data as second RS data in a non-volatile memory if it is not within the range; and
A control unit that controls the data driver and the scan driver, generates a control signal and data based on second RS data stored in the non-volatile memory, and provides the control signal and data to the data driver,
Whether the calculated RS data is within a preset valid range is checked using a Gaussian model of the RS data for each pixel stored in the RS database,
The preset corrected RS data is an average value of a Gaussian model of RS data for each pixel stored in the RS database.
delete an RS data calculation unit that performs real time sensing (RS) for each pixel of the display panel and calculates first RS data through compensation;
Based on the RS database storing RS data for each pixel, it is checked whether the calculated first RS data is within a preset effective range, and if the test result is within the preset effective range, the corresponding first RS data is valid. an RS data correction unit that stores preset correction RS data as second RS data in a non-volatile memory if it is not within the range; and
Controlling a data driver that provides a data signal to a plurality of data lines arranged in the display panel and a scan driver that provides a scan signal to a plurality of gate lines arranged in the display panel, the second RS stored in the non-volatile memory It includes a control unit that generates control signals and data based on data and provides them to the data driver,
Whether the calculated RS data is within a preset valid range is checked using a Gaussian model of the RS data for each pixel stored in the RS database,
The timing controller of an organic light emitting diode display device, wherein the preset corrected RS data is an average value of a Gaussian model of RS data for each pixel stored in the RS database.
The timing controller of claim 12, wherein the RS database accumulates and stores RS data for each pixel.
According to clause 12,
The RS database is an organic light emitting diode that groups the pixel-specific RS data into each block and stores the average RS data calculated from the plurality of pixels included in each block for each block. Timing controller of the display device.

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