KR20230103680A - Display device and method for driving the same - Google Patents

Abstract

The present application relates to a display device and a driving method thereof, which can improve image quality through divided driving of each subpixel. According to an embodiment of the present invention, the display device can expand the bit depth of each subpixel by expressing the grayscale of each subpixel by applying spatial and temporal dithering to a plurality of light emitting areas independently driven in each subpixel.

Description

Display device and its driving method {DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME}

The present specification relates to a display device capable of improving picture quality.

The light emitting display device uses a self-emitting device that emits light through an organic light emitting layer by recombination of electrons and holes, and has advantages of high luminance, low driving voltage, ultra-thin film, and free shape.

In the light emitting display device, luminance variation between subpixels may occur due to variations in characteristics of a light emitting element or a driving thin film transistor (hereinafter referred to as TFT).

In the light emitting display device, low current driving and luminance deviation between sub-pixels reduce the ability to express low gradations when expressing low gradations, and thus uneven luminance may occur.

The content of the background art described above is technical information that the inventor of the present specification possesses to derive examples of the present specification or acquired in the course of deriving examples of the present specification, and must be disclosed to the general public prior to filing the present specification. It cannot be said that it is a well-known technology.

The present specification provides a display device capable of improving image quality through divisional driving of each subpixel and a driving method thereof.

The problems to be solved according to the examples of the present specification are not limited to the above-mentioned problems, and other problems not mentioned are to those skilled in the art from the description below to which the technical spirit of the present specification belongs. will be clearly understood.

A display device according to an embodiment includes a display panel including a plurality of pixels, each of the plurality of pixels including a plurality of subpixels, and each of the plurality of subpixels including a plurality of light emitting regions driven independently; A panel driver driving the panel, and input data respectively corresponding to a plurality of subpixels are converted into a plurality of divided data respectively corresponding to a plurality of light emitting regions of each subpixel, and the converted data is passed through the panel driver to display the panel. It may include a timing controller supplied with.

In order to display a specific grayscale of each subpixel, each of a plurality of light emitting regions of each subpixel may display the same grayscale or different grayscales.

In order to display a specific grayscale of each subpixel, each of the plurality of emission regions of each subpixel may display the same grayscale or different grayscales in the first frame and the second frame.

The timing controller may determine an edge pixel having a luminance difference greater than a specific value and an edge direction using input data of each subpixel, and turn off an outermost light emitting region disposed along the edge direction in the determined edge pixel.

The timing controller determines data of a low grayscale region below a threshold value from the input data of each subpixel, and transfers the determined low grayscale data of each subpixel to at least one light emitting region among a plurality of light emitting regions of each subpixel. It can be converted into data that corresponds to a specific gray level with uniformity characteristics secured and data that turns off the rest of the light emitting regions.

Among the plurality of light emitting areas of each subpixel, a position of a light emitting area displaying the specific gray level may be changed for each frame.

A method of driving a display device according to an exemplary embodiment includes a display panel including a plurality of pixels, each of the plurality of pixels including a plurality of subpixels, and each of the plurality of subpixels including a plurality of light emitting regions that are independently driven. In order to drive, the display driver converts input data corresponding to a plurality of subpixels into a plurality of divided data respectively corresponding to a plurality of light emitting regions of each subpixel, and outputs the converted data to a display panel. can

Specific details according to various examples of the present specification other than the means for solving the problems mentioned above are included in the description and drawings below.

The display device according to an exemplary embodiment may extend bit depth of data by spatially and temporally dithering a plurality of light emitting regions independently driven in each subpixel to express a gray level of each subpixel.

The display device according to an embodiment may improve line expressiveness by turning off the outermost light-emitting areas among a plurality of light-emitting areas of each sub-pixel according to the edge direction in the pixel determined as the edge of the line, and a specific color is visible at the white edge. Color blindness can be prevented.

The display device according to an exemplary embodiment expresses the low gradation of each subpixel as an average combination of specific gradations in which uniformity performance is secured through a plurality of independent light emitting regions, thereby securing uniformity performance of low luminance and improving image quality. can

1 is a block diagram illustrating a configuration of a display device according to an exemplary embodiment.
2 is a diagram illustrating a pixel structure according to an exemplary embodiment.
3 is an equivalent circuit diagram illustrating a configuration of one light emitting region of a subpixel according to an exemplary embodiment.
4 is an equivalent circuit diagram illustrating a configuration of one light emitting region of a subpixel according to an exemplary embodiment.
5 is a diagram illustrating a method of expressing a specific grayscale using spatial and temporal dithering in a display device according to an exemplary embodiment.
6 is a diagram illustrating a method of displaying a line in a first direction in a display device according to an exemplary embodiment.
7 is a diagram illustrating a method of displaying a line in a second direction in a display device according to an exemplary embodiment.
8 and 9 are diagrams illustrating a method of displaying a line in a third direction in a display device according to an exemplary embodiment.
10 and 11 are diagrams illustrating a method of displaying a line in a fourth direction in a display device according to an exemplary embodiment.
12 is a diagram illustrating a low grayscale expression method of a display device according to an exemplary embodiment.
13 is a flowchart illustrating a data processing method among driving methods of a display device according to an exemplary embodiment.

Advantages and features of this specification, and methods of achieving them, will become clear with reference to embodiments described below in detail in conjunction with the accompanying drawings. However, this specification is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments make the disclosure of this specification complete, and common knowledge in the art to which this specification belongs. It is provided to completely inform the person who has the scope of the invention, and this specification is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of this specification are illustrative, so this specification is not limited to the matters shown. Like reference numbers designate like elements throughout the specification. In addition, in describing the present specification, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present specification, the detailed description will be omitted. When "comprises," "has," "consists of," etc. mentioned in this specification is used, other parts may be added unless "only" is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description of the error range, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, when the positional relationship of two parts is described as “on top,” “upper,” “lower,” “next to,” etc., for example, “right” Or, unless "directly" is used, one or more other parts may be located between the two parts.

In the case of a description of a temporal relationship, when a temporal precedence relationship is described with “after,” “next to,” “next to,” “before,” etc., unless “immediately” or “directly” is used, it is not continuous. cases may be included.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present specification.

In describing the components of the present specification, terms such as first, second, A, B, a, b, etc. may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, order, or number of the corresponding component is not limited by the term. When an element is described as being "connected," "coupled to," or "connected to" another element, that element is directly connected or capable of being connected to the other element, but indirectly unless specifically stated otherwise. It should be understood that other components may be “interposed” between each component that is or can be connected.

“At least one” should be understood to include all combinations of one or more of the associated elements. For example, "at least one of the first, second, and third elements" means not only the first, second, or third elements, but also two of the first, second, and third elements. It can be said to include a combination of all components of one or more.

Each feature of the various embodiments of the present specification can be partially or entirely combined or combined with each other, technically various interlocking and driving are possible, and each embodiment can be implemented independently of each other or can be implemented together in an association relationship. may be

Hereinafter, looking at the embodiments of the present specification through the accompanying drawings and embodiments are as follows. Since the scales of the components shown in the drawings have different scales from actual ones for convenience of explanation, they are not limited to the scales shown in the drawings.

1 is a block diagram illustrating a configuration of a display device according to an exemplary embodiment.

An electroluminescent display using a self-luminous element may be applied to the display device 1000 according to an embodiment. An organic light emitting diode (OLED) display device, a quantum-dot light emitting diode display device, or an inorganic light emitting diode display device may be applied to the electroluminescent display device. . A micro light emitting diode display device may be applied to the display device 1000 according to an embodiment.

Referring to FIG. 1 , a display device 1000 may include a display panel 100, a gate driver 200, a data driver 300, a timing controller 400, a gamma voltage generator 500, and the like. The gate driver 200 and the data driver 300 may be defined as panel drivers that drive the display panel 100 . The gate driver 200, the data driver 300, the timing controller 400, the gamma voltage generator 500, and the like may be defined as a display driver.

The display panel 100 displays an image through a display area in which pixels PX are arranged in a matrix form. The display panel 100 may be a panel to which a touch sensor screen overlapping a pixel array of a display area is embedded or attached.

In the display panel 100, the basic pixels PX include a green (hereinafter referred to as G) subpixel emitting green color light, a red (hereinafter referred to as R) subpixel emitting red color light, and a blue color emitting light. It may include sub-pixels (hereinafter referred to as B). Each of the G, R, and B subpixels is divided into a plurality of light emitting regions, and each of the plurality of light emitting regions may be independently driven.

For example, the G subpixel may include light emitting regions G1 to G4 that are independently driven. The R subpixel may include independently driven R1 to R4 light emitting regions. The B subpixel may include light emitting regions B1 to B4 that are independently driven.

In each pixel PX, light emitting areas G1 to G4 are arranged in a matrix form in the G subpixel area, light emitting areas R1 to R4 are arranged in a matrix form in the R subpixel area, and light emitting areas B1 to B4 are arranged in a B subpixel area. It can be arranged in a matrix form in the area. The R subpixel area and the B subpixel area may be alternately arranged in the first direction (vertical direction). The G subpixel area may be arranged in parallel with the R subpixel area and the B subpixel area.

Each of the light emitting regions G1 to G4, R1 to R4, and B1 to B4 of the G, R, and B subpixels may include a light emitting element and a pixel circuit independently driving the light emitting element. As the light emitting device, organic light emitting diodes, quantum dot light emitting diodes, and inorganic light emitting diodes may be applied. The pixel circuit may include TFTs of various configurations including a driving TFT for driving a light emitting element and a switching TFT for transmitting data signals to the driving TFT, and a storage capacitor for storing a driving voltage of the driving TFT. The pixel circuit may be connected to signal lines including gate lines, data lines, and power lines disposed on the display panel 100 .

The gate driver 200 is controlled according to a plurality of gate control signals supplied from the timing controller 400 and can individually drive the gate lines of the display panel 100 . The gate driver 200 may supply a gate-on voltage scan signal to the corresponding gate line during the driving period of each gate line, and supply a gate-off voltage to the corresponding gate line during the non-driving period of each gate line. The gate driver 200 may be embedded in the bezel area of the display panel 100 in the form of a gate in panel (GIP) formed together with TFTs in the display area.

The gamma voltage generator 500 generates a plurality of reference gamma voltages having different gamma voltage levels and supplies them to the data driver 300 . The gamma voltage generator 500 may generate a plurality of reference gamma voltages corresponding to the gamma characteristics of the display device under the control of the timing controller 400 and supply them to the data driver 300 . The gamma voltage generator 500 may adjust the reference gamma voltage level according to the gamma data supplied from the timing controller 400 and output the adjusted reference gamma voltage level to the data driver 300 . The gamma voltage generator 500 may adjust the high-potential power supply voltage, which is the maximum gamma voltage, according to the peak luminance control from the timing controller 400, and adjust a plurality of standard reference gamma voltages according to the high-potential power supply voltage to drive the data driver. (300).

The data driver 300 is controlled according to the data control signal supplied from the timing controller 400, converts the digital data supplied from the timing controller 400 into an analog data signal through a digital-to-analog converter, and Each data signal may be supplied to each data line Dm. In this case, the data driver 300 may convert digital data into an analog data signal using grayscale voltages in which a plurality of reference gamma voltages supplied from the gamma voltage generator 500 are subdivided.

Additionally, the data driver 300 may supply a reference voltage to the reference line of the panel 100 under the control of the timing controller 400 . The data driver 300 may separately supply reference voltages for display and sensing under the control of the timing controller 400 .

The data driver 300 uses a sensing unit under the control of the timing controller 400 to generate a signal in which driving characteristics of each of the plurality of light emitting regions (G1 to G4, R1 to R4, and B1 to B4) of the subpixel are reflected through a reference line. may be sensed using a voltage sensing method or a current sensing method.

The timing controller 400 may receive source image data and timing control signals from a host system. The host system may be any one of a computer, a TV system, a set-top box, a system of a portable terminal such as a tablet or mobile phone, or a system inside a vehicle. The timing control signals may include a dot clock, a data enable signal, a vertical sync signal, a horizontal sync signal, and the like.

The timing controller 400 may control the gate driver 200 and the data driver 300 using timing control signals supplied from the host system and timing setting information stored therein. The timing controller 400 may generate a plurality of gate control signals for controlling driving timing of the gate driver 200 and supply them to the gate driver 200 . The timing controller 400 may generate and supply a plurality of data control signals for controlling driving timing of the data driver 300 to the data driver 300 .

The timing controller 400 may perform various image processing including image quality correction, deterioration correction, luminance correction to reduce power consumption, etc. on the data of the source image supplied from the host system, and transmit the image-processed data to a data driver. (300).

The timing controller 400 transmits the G, R, and B data respectively corresponding to the G, R, and B subpixels to a plurality of emission areas G1 to G4, R1 to R4, and B1 to B4 of the G, R, and B subpixels. A first data conversion may be performed to convert each into corresponding divided data. The timing controller 400 may extend the bit-depth through spatial and temporal dithering when converting the first data.

For example, the timing controller 400 may convert G input data corresponding to G subpixels into G1 to G4 division data corresponding to G1 to G4 light emitting regions, and spatially/temporally divide the G1 to G4 division data. You can dither. The timing controller 400 may convert R input data corresponding to R subpixels into R1 to R4 divided data corresponding to R1 to R4 light emitting regions, respectively, and spatially/temporally dither the R1 to R4 divided data. . The timing controller 400 may convert B input data corresponding to B subpixels into B1 to B4 division data corresponding to B1 to B4 light emitting regions, and spatially/temporally dither the B1 to B4 division data. .

The timing controller 400 may use the R, G, and B data of each pixel to determine whether the luminance difference between adjacent pixels is an edge greater than a specific value and the direction of the edge. The timing controller 400 may perform second data conversion to turn off the outermost light emitting areas among the light emitting areas of each subpixel according to the determined edge direction in the pixel determined to be an edge. Accordingly, line expressiveness can be improved, and a color bleed phenomenon in which a specific color is seen at a white edge of high luminance can be prevented.

The timing controller 400 may determine the G, R, and B data of the low grayscale region where the low grayscale expressiveness problem occurs. The timing controller 400 may perform third data conversion to convert the determined G, R, and B data of the low grayscale region into divided data of a specific grayscale. The specific gray level may be a minimum value among gray levels for which uniformity performance is secured through a uniformity measurement process. The specific gray level may vary depending on the type of display device. The specific gradation may be an intermediate gradation having excellent uniformity and gradation expressiveness. Accordingly, low luminance uniformity can be improved.

Meanwhile, before outputting the converted data to the data driver 300, the timing controller 400 compensates for the characteristic deviation of each of the plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 stored in the memory. Values can be applied for further correction. In the sensing mode, the timing controller 400 senses the characteristics of each of the plurality of light emitting regions (G1 to G4, R1 to R4, and B1 to B4) of the panel 100 through the data driver 300 and uses the sensing result. Thus, the compensation value of each region stored in the memory may be updated.

As described above, the display device 1000 according to an exemplary embodiment independently drives the plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 constituting each subpixel, and the plurality of light emitting regions G1 to G4. G4, R1 to R4, and B1 to B4) are spatially and temporally dithered to express the gray level of each subpixel, thereby extending the bit depth of data.

The display device 1000 according to an exemplary embodiment turns off outermost light emitting areas among a plurality of light emitting areas G1 to G4, R1 to R4, and B1 to B4 of each subpixel along the edge direction in a pixel determined as an edge. It is possible to improve line expressiveness and prevent a color blemish phenomenon in which a specific color is visible at the white edge.

The display device 1000 according to an exemplary embodiment controls the low gray level of each sub-pixel through a plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 that are independently driven, and uniformity performance is secured at a specific gray level. By reproducing with the average combination of , it is possible to improve image quality by securing uniformity performance of low luminance.

2 is a diagram illustrating a pixel arrangement structure of a display panel according to an exemplary embodiment.

Referring to FIG. 2 , a structure of four pixels PX11, PX12, PX21, and PX22 belonging to two row lines and two column lines of a pixel array of a display panel according to an exemplary embodiment is illustrated.

In the pixels PX11 of the first row line and the first column line and the pixels PX21 of the second row line and the first column line, the light emitting regions G1 to G4 are respectively connected to the data lines DG11 to DG14, and The light emitting region R4 may be connected to data lines DR11 to DR14, respectively, and the light emitting regions B1 to B4 may be connected to data lines DB11 to DB14.

In the pixels PX12 of the first row line and the second column line and the pixels PX22 of the second row line and the second column line, the G1 to G4 light emitting regions are connected to the DG21 to DG24 data lines, respectively, and R1 to The light emitting region R4 may be connected to data lines DR21 to DR24, respectively, and the light emitting regions B1 to B4 may be connected to data lines DB21 to DB24.

In the pixels PX11 and PX12 of the first row line, the plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 are commonly connected to the first gate line G1 or drive the first row line. may be commonly connected to a plurality of gate lines.

In the pixels PX21 and PX22 of the second row line, the plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 are commonly connected to the second gate line G2 or drive the second row line. may be commonly connected to a plurality of gate lines.

Each of the light emitting regions G1 to G4 constituting the G subpixel may be independently driven to display the same gray level or different gray levels to display a specific gray level of the G subpixel. Each of the light emitting regions R1 to R4 constituting the R subpixel may be independently driven to display the same gray level or different gray levels to display a specific gray level of the G subpixel. Each of the light emitting regions B1 to B4 constituting the B subpixel may be independently driven to display the same gray level or different gray levels to display a specific gray level of the B subpixel.

Each of the light emitting regions G1 to G4, R1 to R4, and B1 to B4 of the G, R, and B subpixels may include a light emitting element and a pixel circuit independently driving the light emitting element.

3 is an equivalent circuit diagram illustrating a configuration of one light emitting region of a subpixel according to an exemplary embodiment.

Referring to FIG. 3 , each light emitting region 10A has a first power line PW1 supplying a high potential driving voltage (first driving voltage; EVDD) and a low potential driving voltage (second driving voltage; EVSS). The light emitting element EL connected between the supplying second power line PW2 and the first and second switching TFTs ST1 and ST2 and the driving TFT DT to independently drive the light emitting element EL A pixel circuit including at least a storage capacitor Cst may be provided.

The light emitting element EL may include an anode connected to the source node N2 of the driving TFT DT, a cathode connected to the second power line PW2, and an organic light emitting layer between the anode and the cathode. The anode is independent for each subpixel, but the cathode may be a common electrode shared by all subpixels. In the light emitting element EL, when a driving current is supplied from the driving TFT DT, electrons from the cathode are injected into the organic light emitting layer, and holes from the anode are injected into the organic light emitting layer. By emitting the phosphor, light of brightness proportional to the current value of the driving current can be generated.

The first switching TFT (ST1) is driven by the scan gate signal (SCn) supplied from the gate driver 200 to the first gate line (Gn1) and data supplied from the data driver 300 to the data line (Dm). The voltage Vdata may be supplied to the gate node N1 of the driving TFT DT.

The second switching TFT (ST2) is driven by the sense gate signal (SEn) supplied from the gate driver 200 to the second gate line (Gn2), and the reference is supplied from the data driver 300 to the reference line (Rm). The voltage Vref may be supplied to the source node N2 of the driving TFT DT. Meanwhile, in the sensing mode, the second switching TFT ST2 may provide a current reflecting the characteristics of the driving TFT DT or the light emitting element EL to the reference line Rm.

The first and second switching TFTs ST1 and ST2 may be controlled by different gate lines Gn1 and Gn2 or the same gate line as shown in FIG. 3 .

The storage capacitor Cst connected between the gate node N1 and the source node N2 of the driving TFT DT connects the gate node N1 and the source node ( The difference between the data voltage (Vdata) and the reference voltage (Vref) supplied to N2) is charged as the driving voltage (Vgs) of the driving TFT (DT), and the first and second switching TFTs (ST1, ST2) are turned off. The driving voltage (Vgs) charged during the light emission period is held.

The driving TFT DT can control the light emitting intensity of the light emitting element EL by controlling the current Ids flowing to the light emitting element EL according to the driving voltage Vgs charged in the storage capacitor Cst.

4 is an equivalent circuit diagram illustrating a configuration of one light emitting region of a subpixel according to an exemplary embodiment.

Referring to FIG. 4 , the pixel circuit of each light emitting region 10B includes a light emitting element EL, a driving TFT DT supplying current to the light emitting element EL, a plurality of TFTs T1 to T6, and a storage capacitor ( Cst) may be included. The TFTs of each pixel circuit may be TFTs using any one of a polysilicon semiconductor, an amorphous silicon semiconductor, and an oxide semiconductor.

For example, the driving TFT (DT) and the TFTs (T1 to T3, T5, T6) excluding the compensating TFT (T4) may be composed of P-type channel polysilicon TFTs using high-mobility polysilicon. The compensation TFT (T4) connecting the driving TFT (DT) in a diode structure may be composed of an N-type channel oxide TFT using an oxide semiconductor having a smaller leakage current than polysilicon. During low-speed driving with a relatively slow screen update rate, the fourth switching TFT T4 blocks leakage current to prevent flicker.

The light emitting element EL has an anode connected to the drain electrode of the driving TFT DT through the light emission control TFT T5, a cathode connected to the second power supply electrode 110 supplying the second power supply voltage VSSEL, and , It may be provided with an organic light emitting layer between the anode and the cathode. The light emitting element EL may generate light of brightness proportional to the current value of the driving current supplied from the driving TFT DT.

The compensating TFT (T4) is controlled by the first gate line 104 and has a second node N3 connected to the gate electrode of the driving TFT (DT) and a third node connected to the drain electrode of the driving TFT (DT). (N3) can be connected. The compensating TFT (T4) is turned on by the gate-on voltage of the first gate signal (SC1[n]) supplied through the first gate line 104, and the gate electrode and the drain electrode of the driving TFT (DT) are turned on. By connecting, the driving TFT (DT) can be connected in a diode structure. The first gate line 104 can be shared by two row lines, the n-1th row line and the nth row line (n is an integer greater than or equal to 2), and as a result, is embedded in the bezel area of the display panel 100 The size of the gate driver 200 and the size of the bezel may be reduced.

The switching TFT (T1) is controlled by the second gate line 105 and may connect the data line 102 and the first node N1 connected to the source electrode of the driving TFT (DT). The switching TFT (T1) is turned on by the gate-on voltage of the second gate signal (SC2[n]) supplied through the second gate line 105, and is supplied through the data line 102 to the data voltage ( Vdata) can be supplied to the source electrode of the driving TFT (DT).

The operation control TFT (T2) is controlled by the emission control line 111 and may connect the first power line (VDDEL) and the first node (N1) connected to the source electrode of the driving TFT (DT). The operation control TFT (T2) is turned on by the gate-on voltage of the light emission control signal EM[n] supplied through the light emission control line 111, and the first power supply line 103 supplies the first The power voltage EVDD may be supplied to the source electrode of the driving TFT DT.

The light emission control TFT (T5) is controlled by the light emission control line 111, and a third node N3 connected to the drain electrode of the driving TFT (DT) and a fourth node connected to the anode electrode of the light emitting element EL. (N4) can be connected. The emission control TFT (T5) is turned on by the gate-on voltage of the emission control signal (EM[n]) supplied through the emission control line 111, and the drain electrode of the driving TFT (DT) and the light emitting element (EL) ) can be connected to the anode electrode.

The first initialization TFT T3 may connect a third node N3 controlled by the third gate line 106 and connected to the drain electrode of the driving TFT DT to the first initialization line 108. . The first initialization TFT (T3) is turned on by the gate-on voltage of the second gate signal (SC3[n]) supplied through the third gate line 106, and is connected to the drain electrode of the driving TFT (DT). The first initialization voltage Vini[n] supplied through the first initialization line 108 may be supplied to the third node N3 .

The second initialization TFT T6 is controlled by the fourth gate line 107 and may connect the second initialization line 109 and the fourth node N4 connected to the anode of the light emitting element EL. The second initialization TFT ( T6 ) is turned on by the gate-on voltage of the fourth gate signal ( SC3 [n+1]) supplied through the fourth gate line 107 and serves as an anode electrode of the light emitting element (LED). The second initialization voltage VAR supplied through the second initialization line 109 may be supplied to the fourth node N4 connected to . The fourth gate line 107 may share a third gate line supplying the third gate signal SC3 [n+1] in an n+1th (n is a positive integer) row line.

The storage capacitor Cst may be connected between the first power line 103 and the second node N2 connected to the gate electrode of the driving TFT DT. The storage capacitor Cst connects the first power supply voltage VDDEL supplied through the first power line 103, the switching TFT T2, the driving TFT DT, and the compensation TFT T1 from the data line 102. The difference voltage from the data voltage Vdata supplied to the second node N2 via the second node N2 may be charged. While the driving TFT (DT) is connected in a diode structure through the compensating TFT (T4), the storage capacitor (Cst) can sample and store the threshold voltage (Vth) of the driving TFT (DT). A data voltage (Vdata-Vth) in which the threshold voltage (Vth) is compensated may be provided to the gate electrode. Accordingly, the storage capacitor Cst generates a target voltage difference (VDDEL-Vdata+Vth) between the first power supply voltage VDDEL and the data voltage Vdata obtained by compensating the threshold voltage Vth of the driving TFT DT. It can be charged with a voltage, and the charged target voltage can be provided as a driving voltage (Vgs) between the gate and source electrodes of the driving TFT (DT). Accordingly, the variation in characteristics of the driving TFT (DT) between subpixels can be compensated for.

The driving TFT DT controls the light emitting intensity of the light emitting element EL by controlling the current Ids flowing to the light emitting element EL according to the driving voltage charged in the storage capacitor Cst.

In FIG. 4 , the gate lines 104, 105, 106, and 107 may be driven by the gate driver 200, and the emission control line 111 together with the gate driver 200 may be applied to the bezel area of the display panel 100. It can be driven by a light emission control driver (not shown) disposed on the .

5 is a diagram illustrating a method of expressing a specific grayscale using spatial and temporal dithering in a display device according to an exemplary embodiment.

Referring to FIG. 5 , each of the plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 included in each pixel (PXij, where i is a positive integer and j is a positive integer) has one gate line. (Gi, i is a positive integer) and any one data line (DGjk or DRjk or DBjk, j is a positive integer, k = 1 to 4) and can be independently driven.

In each pixel PXij, the light emitting regions G1 to G4 may display the same gray level or different gray levels, thereby displaying a specific gray level of the G subpixel. The G1 to G4 light emitting regions may receive G1 to G4 data divided and dithered from the G input data by the timing controller 400 . Accordingly, in order to display a specific gray level of the G subpixel, each of the light emitting regions G1 to G4 may display the same or different gray levels, and each of the light emitting regions G1 to G4 in the Nth frame and the N+1th frame The same or different gradations may be displayed.

The light emitting regions R1 to R4 receiving R1 to R4 data from each pixel PXij may display the same or different gray levels, thereby displaying a specific gray level of the R subpixel. The R1 to R4 light emitting regions may receive R1 to R4 data divided and dithered from the R input data by the timing controller 400 . Accordingly, in order to display a specific gray level of the R subpixel, each of the light emitting regions R1 to R4 may display the same or different gray levels, and each of the light emitting regions R1 to R4 in the Nth frame and the N+1th frame The same or different gradations may be displayed.

The light emitting regions B1 to B4 receiving the data B1 to B4 from each pixel PXij may display the same or different gray levels, thereby displaying a specific gray level of the B subpixel. The B1 to B4 light emitting regions may receive B1 to B4 data divided and dithered from B input data by the timing controller 400 . Accordingly, in order to display a specific gray level of the B subpixel, each of the light emitting regions B1 to B4 may display the same or different gray levels, and each of the light emitting regions B1 to B4 in the Nth frame and the N+1th frame The same or different gradations may be displayed.

As described above, the display device 1000 according to an exemplary embodiment independently drives the plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 constituting each subpixel, and the plurality of light emitting regions G1 to G4. G4, R1 to R4, and B1 to B4) are spatially and temporally dithered to express the gray level of each subpixel, thereby extending the bit depth of data.

6 is a diagram illustrating a method of displaying a line edge in a first direction in a display device according to an exemplary embodiment.

Referring to FIG. 6 , the pixels PX11, PX12, PX21, and PX22 display a white luminance line L2 extending in the first direction D1 (vertical direction), and the pixels PX11, PX12, and PX21 , PX22) and other pixels (not shown) adjacent in the second direction D2 (horizontal direction) display black luminance L1 as an example.

The timing controller 400 detects the luminance difference between adjacent pixels by applying an edge detection mask pattern to the G, R, and B data of each frame, thereby discriminating an edge pixel having a luminance difference between adjacent pixels equal to or greater than a specific value, and direction can be identified.

The timing controller 400 may turn off the outermost light emitting region disposed in the edge direction from a pixel having a relatively high luminance among pixels determined as an edge.

Referring to FIG. 6 , the pixels PX11 and PX21 of the first column line and the pixels PX12 and PX22 of the second column line are edge pixels displaying white luminance L1 in the first direction D1. can be determined by Among the pixels PX11 and PX21 of the first column line, the light emitting regions G1 and G3, which are the outermost light emitting regions disposed along the first direction D1, which is the edge direction, are turned off, so that the white edge in the first direction D1 It is possible to prevent the discoloration phenomenon in which the green color is visible. Among the pixels PX12 and PX22 of the second column line, the light emitting regions R2, R4, B2, and B4, which are the outermost light emitting regions disposed along the first direction D1, which is the edge direction, are turned off, thereby turning off the white edge in the first direction. With (D1), it is possible to prevent a discoloration phenomenon in which magenta color is visible.

7 is a diagram illustrating a method of displaying a line edge in a second direction in a display device according to an exemplary embodiment.

Referring to FIG. 7 , the pixels PX11, PX12, PX21, and PX22 display a white luminance line L2 extending in the second direction D2 (horizontal direction), and the pixels PX11, PX12, and PX21 , PX22) and other pixels (not shown) adjacent in the first direction D1 (horizontal direction) display black luminance L1 as an example.

In FIG. 7 , the pixels PX11 and PX12 of the first row line and the pixels PX21 and PX22 of the second row line are determined as edge pixels displaying the white luminance L1 in the second direction D2. can Among the pixels PX11 and PX12 of the first row line, the light emitting regions G1, G2, R1, and R2, which are the outermost light emitting regions disposed along the second direction D2, which is the edge direction, are turned off, so that the second direction from the white edge It is possible to prevent a color fading phenomenon in which yellow color of (D2) is visible. Among the pixels PX21 and PX22 of the second row line, the light emitting areas G3, G4, B3, and B4, which are the outermost light emitting areas disposed along the second direction D2, which is the edge direction, are turned off, so that the second direction from the white edge With (D2), it is possible to prevent a discoloration phenomenon in which cyan color is seen.

8 and 9 are diagrams illustrating a method of displaying a line in a third direction in a display device according to an exemplary embodiment.

Referring to FIGS. 8 and 9 , the pixels PX11, PX12, PX21, and PX22 display white luminance lines extending in a third direction (D3, a first diagonal direction), and the pixels PX11 and PX12 , PX21, PX22) and other pixels (not shown) adjacent in the fourth direction (D4, the second diagonal direction) display black luminance as an example.

In FIG. 8 , the first to third pixels PX11 , PX12 , and PX21 may be determined as edge pixels displaying white luminance in the third direction D3 . all light-emitting areas of the first pixel PX11, which is an outermost light-emitting area disposed along the third direction D3, which is the edge direction, among the white edge pixels PX11, PX12, and PX21 in the third direction D3; The light-emitting regions G1, G2, and R1 of the second pixel PX12 and the light-emitting regions G1, G2, and R1 of the third pixel PX21 are turned off, thereby improving white edge expression in the third direction D3. .

In FIG. 9 , the second to fourth pixels PX12 , PX21 , and PX22 may be determined as edge pixels displaying white luminance in the third direction D3 . all light-emitting areas of the fourth pixel PX22, which is an outermost light-emitting area disposed along the third direction D3, which is the edge direction, among the white edge pixels PX12, PX21, and PX22 in the third direction D3; By turning off the light emitting areas B2, B3, and B4 of the second pixel PX12 and the light emitting areas B2, B3, and B4 of the third pixel PX21, the expressiveness of the white edge in the third direction D3 may be improved. .

10 and 11 are diagrams illustrating a method of displaying a line in a fourth direction in a display device according to an exemplary embodiment.

10 and 11, the pixels PX11, PX12, PX21, and PX22 display a white luminance line extending in a fourth direction (D4, a second diagonal direction), and the pixels PX11 and PX12 , PX21, PX22) and other pixels (not shown) adjacent in the third direction (D3, first diagonal direction) display black luminance as an example.

In FIG. 10 , the first, third, and fourth pixels PX11 , PX21 , and PX22 may be determined as edge pixels displaying white luminance in the fourth direction D4 . all light emitting areas of the third pixel PX21, which is an outermost light emitting area disposed along the fourth direction D4, which is an edge direction, among the white edge pixels PX11, PX21, and PX22 in the fourth direction D4; The light emitting regions G3, G4, and B3 of the first pixel PX12 and the light emitting regions G3, G4, and B3 of the fourth pixel PX22 are turned off, thereby improving white edge expression in the fourth direction D4. .

In FIG. 11 , the first, second, and fourth pixels PX11 , PX12 , and PX22 may be determined as edge pixels displaying white luminance in the fourth direction D4 . all light emitting areas of the second pixel PX12, which is an outermost light emitting area disposed along the fourth direction D4, which is an edge direction, among the white edge pixels PX11, PX12, and PX22 in the fourth direction D4; The R1, R2, and R4 light-emitting regions of the first pixel PX12 and the R1, R2, and R4 light-emitting regions of the fourth pixel PX22 are turned off, thereby improving white edge expression in the fourth direction D4. .

As described above, the display apparatus 1000 according to an exemplary embodiment includes the outermost light emitting area among the plurality of light emitting areas G1 to G4, R1 to R4, and B1 to B4 of each subpixel according to the edge direction in the pixel determined as the edge. By turning them off, it is possible to improve line expressiveness and prevent a color smudge phenomenon in which a specific color is seen at the white edge.

12 is a diagram illustrating a low grayscale expression method of a display device according to an exemplary embodiment.

The timing controller 400 may determine the G, R, and B data of the low grayscale region where the low grayscale expressiveness problem occurs. The timing controller 400 may perform third data conversion to convert the determined G, R, and B data of the low grayscale region into divided data of a specific grayscale having excellent uniformity characteristics.

Accordingly, when the pixels PX11, PX12, PX21, and PX22 display a low gradation, at least one light emitting area among the plurality of light emitting areas G1 to G4, R1 to R4, and B1 to B4 has uniformity characteristics. An excellent specific gradation can be displayed and a low gradation can be displayed as an average combination of the specific gradations.

For example, when each of the pixels PX11, PX12, PX21, and PX22 expresses G, R, and B data of 8 gray levels, as shown in FIG. 12, a plurality of light emitting regions of G, R, and B subpixels Among (G1~G4, R1~R4, B1~B4), one light emitting area for each color displays 32 gradations with excellent uniformity characteristics, and the other light emitting areas can be turned off and display 32 gradations for each frame. this may vary.

In the Nth frame, the G1, R1, and B1 light emitting areas among the plurality of light emitting areas (G1 to G4, R1 to R4, and B1 to B4) of the G, R, and B subpixels display 32 gradations with excellent uniformity characteristics, and the rest The light emitting regions G2 to G4, R2 to R4, and B2 to B4 may be turned off.

In the Nth frame, the G2, R2, and B2 light emitting areas among the plurality of light emitting areas (G1 to G4, R1 to R4, and B1 to B4) of the G, R, and B subpixels display 32 gradations with excellent uniformity characteristics, and the rest The light emitting regions G1 , G3 , G4 , R1 , R3 , R4 , B2 , B3 , and B4 may be turned off.

As described above, the display apparatus 1000 according to an exemplary embodiment secures uniformity of low gradation of each subpixel through a plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 that are independently driven. By reproducing the average combination of specific gray levels, it is possible to improve image quality by securing uniformity performance at low luminance.

13 is a flowchart illustrating a data processing method of a display device according to an exemplary embodiment.

The data processing method of the display device illustrated in FIG. 13 may be performed by the timing controller 400 illustrated in FIG. 1 .

Referring to FIGS. 1 and 13 , the timing controller 400 receives G, R, and B data respectively corresponding to the G, R, and B subpixels, and receives a plurality of light emitting regions (G1 to G1 to B) of the G, R, and B subpixels. A first data conversion for converting into divided data corresponding to G4, R1 to R4, and B1 to B4, respectively, may be performed (S402 and S404).

The timing controller 400 may convert G input data corresponding to G subpixels into G1 to G4 division data corresponding to G1 to G4 light emitting regions, and spatially/temporally dither the G1 to G4 division data. . The timing controller 400 may convert R input data corresponding to R subpixels into R1 to R4 divided data corresponding to R1 to R4 light emitting regions, respectively, and spatially/temporally dither the R1 to R4 divided data. . The timing controller 400 may convert B input data corresponding to B subpixels into B1 to B4 division data corresponding to B1 to B4 light emitting regions, and spatially/temporally dither the B1 to B4 division data. .

The timing controller 400 may determine whether an edge has a luminance difference between adjacent pixels greater than a specific value and the direction of the edge by using the R, G, and B data of each pixel (S406). The timing controller 400 may perform second data conversion to turn off the outermost light emitting areas among the light emitting areas of each subpixel according to the determined edge direction in the pixel determined as an edge (S408).

The timing controller 400 may determine the G, R, and B data of the low grayscale region where the low grayscale expressiveness problem occurs (S412). The timing controller 400 may perform a third data conversion of converting the determined G, R, and B data of the low grayscale region into divided data of a specific grayscale having uniformity characteristics (S414).

The timing controller 400 may output the converted data to the data driver 300 (S410).

As described above, the display device 1000 according to an exemplary embodiment independently drives the plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 constituting each subpixel, and the plurality of light emitting regions G1 to G4. G4, R1 to R4, and B1 to B4) are spatially and temporally dithered to express the gray level of each subpixel, thereby extending the bit depth of data.

The display device 1000 according to an exemplary embodiment turns off outermost light emitting areas among a plurality of light emitting areas G1 to G4, R1 to R4, and B1 to B4 of each subpixel along the edge direction in a pixel determined as an edge. It is possible to improve line expressiveness and prevent a color blemish phenomenon in which a specific color is visible at the white edge.

The display device 1000 according to an exemplary embodiment controls the low gray level of each sub-pixel through a plurality of light emitting regions G1 to G4, R1 to R4, and B1 to B4 that are independently driven, and uniformity performance is secured at a specific gray level. By reproducing with the average combination of , it is possible to improve image quality by securing uniformity performance of low luminance.

A display device according to the present specification can be applied to all electronic devices. For example, the display device according to the present specification includes a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, and a rollable device ( rollable device), bendable device, flexible device, curved device, electronic notebook, e-book, portable multimedia player (PMP), personal digital assistant (PDA), MP3 player, Mobile medical device, desktop PC, laptop PC, netbook computer, workstation, navigation, vehicle navigation, vehicle display, television, wallpaper display, It can be applied to a shiny signage device, a game device, a laptop computer, a monitor, a camera, a camcorder, and home appliances.

Features, structures, effects, etc. described in various examples of the above-described specification are included in at least one example of the present specification, and are not necessarily limited to only one example. Furthermore, the features, structures, effects, etc. illustrated in at least one example in this specification can be combined or modified with respect to other examples by those skilled in the art to which the technical idea of this specification belongs. Therefore, contents related to these combinations and variations should be construed as being included in the technical scope or scope of rights of this specification.

The present specification described above is not limited to the foregoing embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes are possible within a range that does not deviate from the technical spirit of the present specification. It will be clear to those who have knowledge of Therefore, the scope of the present specification is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present specification.

100: display panel 200: gate driver
300: data driver 400: timing controller
500: gamma voltage generator 1000: display device

Claims (26)

a display panel including a plurality of pixels, each of the plurality of pixels including a plurality of subpixels, and each of the plurality of subpixels including a plurality of light emitting regions independently driven;
a panel driver driving the display panel; and
and a timing controller converting input data corresponding to the plurality of subpixels into a plurality of divided data respectively corresponding to the plurality of light emitting regions of each subpixel and supplying the converted data to the panel driver. Device. The method of claim 1,
In order to display a specific grayscale of each subpixel, each of the plurality of light emitting regions of each subpixel displays the same grayscale or different grayscales. The method of claim 1,
In order to display a specific grayscale of each subpixel, each of the plurality of light emitting regions of each subpixel displays the same grayscale or different grayscales in a first frame and a second frame. The method of claim 1,
The timing controller
Using the input data of each subpixel, an edge pixel having a luminance difference between adjacent pixels of a specific value or more and an edge direction are discriminated;
A display device that turns off outermost light emitting regions disposed along the edge direction in the determined edge pixel. The method of claim 1,
The timing controller
discriminating data of a low grayscale region below a threshold value from the input data of each subpixel;
A display that converts the determined low grayscale data of each subpixel into a specific grayscale corresponding to at least one light emitting region among a plurality of light emitting regions of each subpixel and ensuring uniformity characteristics, and data for turning off the remaining light emitting regions. Device. The method of claim 5,
The display device of claim 1 , wherein a location of a light emitting area displaying the specific gray level among a plurality of light emitting areas of each subpixel is different for each frame. The method of claim 1,
each pixel
green sub-pixels including first to fourth green emission regions that are independently driven;
red subpixels including first to fourth red light emitting regions that are independently driven; and
A display device including blue subpixels including first to fourth blue light emitting regions that are independently driven. The method of claim 7,
the first to fourth green light-emitting regions are individually connected to first to fourth data lines and commonly connected to a first gate line;
the first to fourth red light emitting regions are individually connected to sixth to eighth data lines and commonly connected to the first gate line;
The first to fourth blue light emitting regions are individually connected to ninth to twelfth data lines and commonly connected to the first gate line. The method of claim 7,
The red subpixel and the blue subpixel are arranged side by side in a first direction;
The green subpixel is disposed parallel to the rev subpixel and the blue subpixel in a second direction orthogonal to the first direction. The method of claim 9,
A plurality of first pixels disposed along the first direction display a first luminance line extending in the first direction, adjacent to the plurality of first pixels in the second direction, and along the first direction. When the plurality of second pixels disposed display a second luminance lower than a specific value or more than the first luminance,
The display device of claim 1 , wherein outermost light-emitting regions of the plurality of first pixels that are most adjacent to the plurality of second pixels and disposed along the first direction are turned off. The method of claim 10,
In the plurality of first pixels, among the green subpixels adjacent to the plurality of second pixels, first and third green emission regions closest to the plurality of second pixels and disposed along the first direction are turned off. become,
In the plurality of first pixels, the second and fourth green emission regions of the green subpixels, the first to fourth red emission regions of red subpixels, and the first to fourth blue emission regions of blue subpixels A display device in which regions emit light to display the first luminance. The method of claim 10,
In the plurality of first pixels, among red and blue subpixels adjacent to the plurality of second pixels, second and fourth red emission regions are most adjacent to the plurality of second pixels and disposed along the first direction. and the second and fourth blue light emitting regions are turned off;
In the plurality of first pixels, the first and third red light emitting regions of the red subpixels, the first and third blue light emitting regions of the blue subpixels, and the first to fourth green light emitting regions of green subpixels A display device in which light emitting regions emit light to display the first luminance. The method of claim 9,
A plurality of first pixels disposed along the second direction display a first luminance line extending in the second direction, adjacent to the plurality of first pixels in the first direction, and along the second direction. When the plurality of second pixels disposed display a second luminance lower than a specific value or more than the first luminance,
The display device of claim 1 , wherein outermost light emitting regions that are most adjacent to the plurality of second pixels in the plurality of first pixels and disposed along the second direction are turned off. The method of claim 13,
In the plurality of first pixels, among green and red subpixels adjacent to the plurality of second pixels, first and second green emission regions are most adjacent to the plurality of second pixels and disposed along the second direction. and the first and second red light emitting regions are off,
In the plurality of first pixels, third and fourth green emission regions of the green subpixels, third and fourth red emission regions of the red subpixels, and first to fourth blue emission regions of blue subpixels A display device in which light emitting regions emit light to display the first luminance. The method of claim 13,
third and fourth green light emitting regions most adjacent to the plurality of second pixels among green and blue subpixels adjacent to the plurality of second pixels in the plurality of first pixels and disposed along the second direction; and, the third and fourth blue light emitting regions are turned off;
In the plurality of first pixels, first and second green emission regions of the green subpixels, first and second blue emission regions of the blue subpixels, and first to fourth red emission regions of red subpixels A display device in which light emitting regions emit light to display the first luminance. The method of claim 9,
A plurality of first pixels arranged along a diagonal direction between the first and second directions display a line of a first luminance extending in the diagonal direction, and the plurality of first pixels and the first diagonal direction When a plurality of second pixels adjacent in another orthogonal diagonal direction and disposed along the diagonal direction display a second luminance lower than a specific value or more than the first luminance,
The display device of claim 1 , wherein outermost light-emitting regions of the plurality of first pixels that are most adjacent to the plurality of second pixels and disposed along the first diagonal direction are turned off. The method of claim 16
In the plurality of first pixels, among green and red subpixels adjacent to the plurality of second pixels, first and second green emission regions most adjacent to the plurality of second pixels and disposed along the diagonal direction and the first red light emitting regions are turned off;
In the plurality of first pixels, the third and fourth green emission regions of the green subpixels, the second to fourth red emission regions of the red subpixels, and the first to fourth blue emission regions of blue subpixels A display device in which light emitting regions emit light to display the first luminance. The method of claim 16
second to fourth blue light emitting regions most adjacent to the plurality of second pixels and disposed along the diagonal direction, among blue subpixels adjacent to the plurality of second pixels in the plurality of first pixels, are turned off;
In the plurality of first pixels, the first blue light emitting regions of the blue subpixels, the first to fourth green light emitting regions of green subpixels, and the first to fourth red light emitting regions of red subpixels emit light. to display the first luminance. The method of claim 16
In the plurality of first pixels, among green and blue subpixels adjacent to the plurality of second pixels, third and fourth green light-emitting regions are most adjacent to the plurality of second pixels and disposed along the diagonal direction. and the third blue light emitting regions are turned off;
In the plurality of first pixels, first and second green emission regions of the green subpixels, first, second and fourth blue emission regions of the blue subpixels, and first to second emission regions of red subpixels A display device displaying the first luminance by emitting light from fourth red light emitting regions. The method of claim 16
Among the red subpixels adjacent to the plurality of second pixels in the plurality of first pixels, first, second, and fourth red light emitting regions most adjacent to the plurality of second pixels and disposed along the diagonal direction are off,
In the plurality of first pixels, third red light emitting regions of the red subpixels, first to fourth green light emitting regions of green subpixels, and first to fourth blue light emitting regions of blue subpixels emit light. to display the first luminance. In order to drive a display panel including a plurality of pixels, each of the plurality of pixels including a plurality of subpixels, each of the plurality of subpixels including a plurality of light emitting regions driven independently,
In a display driver, a display device that converts input data corresponding to each of the plurality of subpixels into a plurality of divided data respectively corresponding to a plurality of light emitting regions of each of the subpixels and outputs the converted data to the display panel. driving method. The method of claim 21,
In order to display a specific grayscale of each subpixel, each of the plurality of light emitting regions of each subpixel displays the same grayscale or different grayscales. The method of claim 21,
In order to display a specific gray level of each sub-pixel, each of the plurality of light emitting regions of each sub-pixel displays the same gray level or different gray levels in a first frame and a second frame. The method of claim 21,
In the display driver,
Using the input data of each subpixel, an edge pixel having a luminance difference between adjacent pixels of a specific value or more and an edge direction are discriminated;
A method of driving a display device of turning off outermost light emitting regions disposed along the edge direction in the determined edge pixel. The method of claim 11,
In the display driver,
discriminating data of a low grayscale region below a threshold value from the input data of each subpixel;
A display that converts the determined low grayscale data of each subpixel into a specific grayscale corresponding to at least one light emitting region among a plurality of light emitting regions of each subpixel and ensuring uniformity characteristics, and data for turning off the remaining light emitting regions. How to drive the device. The method of claim 25
A method of driving a display device in which a position of a light emitting region displaying the specific gray level among a plurality of light emitting regions of each subpixel is changed for each frame.

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