Display device and method for driving the same

Abstract

A display device and a method for driving the display device are disclosed. The display device includes a first point, a second point, a third point, and a first dummy point, wherein the first point includes a first shared pixel and a first dedicated pixel, the second point is arranged closest to the first point in a first direction, and the second point includes a second shared pixel and a second dedicated pixel, a third point is arranged from the second point in the first direction, and the third point includes a third shared pixel and a third dedicated pixel, the first dummy point is arranged closest to the third point in the first direction, and the first dummy point includes a first dummy pixel, wherein the first shared pixel and the second shared pixel are configured to emit light with different colors, the first dedicated pixel, the second dedicated pixel, and the third dedicated pixel are configured to emit light with the same color, and the third shared pixel and the first dummy pixel are configured to emit light with different colors.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0055802, filed on May 13, 2019, which is hereby incorporated by reference for all purposes as if fully set forth herein. Technical Field

[0003] Exemplary embodiments of the present invention generally relate to a display device, and more particularly, to a method of driving the display device. Background Art

[0004] With the development of information technology, the importance of display devices used as a connection medium between users and information has been emphasized. Due to the importance of the display device, the use of various display devices such as liquid crystal display (LCD) devices, organic light emitting display devices, and plasma display devices has increased.

[0005] A pixel unit of the display device may include pixels of different colors, and the display device may display an image frame by using a combination of light emitted from the pixels.

[0006] Pixels of different colors may be arranged in a pixel unit while having a predetermined regularity (such as pentile or RGB stripe). However, the regular arrangement of pixels of different colors may cause a color shift phenomenon, so that a specific color appears at the edge (eg, boundary) of the pixel unit.

[0007] The above information disclosed in this Background section is only for understanding the background of the inventive concept and therefore it may contain information that does not constitute prior art. Summary of the invention

[0008] A display device and a method of driving the display device constructed according to exemplary embodiments of the present invention can prevent color shift from occurring at the edge of a pixel unit.

[0009] Additional features of the inventive concept will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the inventive concept.

[0010] According to an exemplary embodiment, a display device includes a first point, a second point, a third point, and a first dummy point, wherein the first point includes a first shared pixel and a first dedicated pixel, the second point is arranged to be closest to the first point in a first direction, and the second point includes a second shared pixel and a second dedicated pixel, a third point is arranged in the first direction from the second point, and the third point includes a third shared pixel and a third dedicated pixel, the first dummy point is arranged to be closest to the third point in the first direction, and the first dummy point includes the first dummy pixel, wherein the first shared pixel and the second shared pixel are configured to emit light with different colors, the first dedicated pixel, the second dedicated pixel, and the third dedicated pixel are configured to emit light with the same color, and the third shared pixel and the first dummy pixel are configured to emit light with different colors.

[0011] The first dummy pixel may be an outermost pixel with respect to the first point in the first direction.

[0012] The display device may further include a fourth point, a fifth point, and a second dummy point, wherein the fourth point is arranged in the second direction from the first point, and the fourth point includes a fourth shared pixel and a fourth dedicated pixel, the fifth point is arranged in the first direction from the fourth point, and the fifth point is arranged in the second direction from the third point, and the fifth point includes a fifth shared pixel and a fifth dedicated pixel, the second dummy point is arranged to be closest to the fifth point in the first direction, and the second dummy point is arranged in the second direction from the first dummy point, and the second dummy point includes a second dummy pixel, wherein the fifth shared pixel and the second dummy pixel may be configured to emit light having different colors.

[0013] The second dummy pixel may be an outermost pixel with respect to the fourth point in the first direction.

[0014] The second dummy pixel may be an outermost pixel with respect to the first dummy point in the second direction, and the fourth dedicated pixel may be an outermost pixel with respect to the first point in the second direction.

[0015] A light emitting area of ​​the first shared pixel may be smaller than a light emitting area of ​​the second shared pixel, and a light emitting area of ​​the first dummy pixel may be smaller than a light emitting area of ​​the third shared pixel.

[0016] The display device may further include a third dummy dot arranged closest to the fourth dot in the second direction, and the third dummy dot includes a third dummy pixel, wherein the fourth shared pixel and the third dummy pixel may be configured to emit light having different colors.

[0017] The display device may further include a fourth dummy point, which is arranged in the first direction from the third dummy point and is arranged to be closest to the fifth point in the second direction, and the fourth dummy point includes a fourth dummy pixel, wherein the fifth shared pixel and the fourth dummy pixel may be configured to emit light having different colors.

[0018] The display device may further include a fifth dummy point, which is arranged to be closest to the fourth dummy point in the first direction and closest to the second dummy point in the second direction, and the fifth dummy point includes a fifth dummy pixel, wherein the fourth dummy pixel and the second dummy pixel may be configured to emit light having the same color, and the fourth dummy pixel and the fifth dummy pixel may be configured to emit light having different colors.

[0019] In the second direction, the third dummy pixel may be the outermost pixel relative to the first point, in the second direction, the fourth dummy pixel may be the outermost pixel relative to the third point, and in the second direction, the fifth dummy pixel may be the outermost pixel relative to the first dummy point, and in the first direction, the fifth dummy pixel is the outermost pixel relative to the third dummy point.

[0020] The light emitting area of ​​the fifth shared pixel may be greater than that of the second dummy pixel, and the light emitting area of ​​the second dummy pixel may be greater than that of the fifth dummy pixel.

[0021] The image frame may include an input gray value of the first point, an input gray value of the second point, and an input gray value of the third point, and the image frame may not include an input gray value of the first dummy point.

[0022] The display device may further include a renderer configured to generate an output grayscale value of a second shared pixel by using an input grayscale value of the same color in the first point and the second point, wherein the renderer may also be configured to generate an output grayscale value of a first dummy pixel by using an input grayscale value of a third point.

[0023] A ratio of the input gray value of the third point applied to the output gray value of the first dummy pixel may be equal to a ratio of the input gray value of the first point applied to the output gray value of the second shared pixel.

[0024] A ratio of the input gray value of the third point applied to the output gray value of the first dummy pixel may be greater than a ratio of the input gray value of the first point applied to the output gray value of the second shared pixel.

[0025] A method for driving a display device according to another exemplary embodiment includes the following steps: receiving respective input grayscale values ​​of a first point, a second point arranged closest to the first point in a first direction, and a third point arranged in the first direction from the second point, generating an output grayscale value of a second shared pixel included in the second point by using input grayscale values ​​of the same color in the first point and the second point, and generating an output grayscale value of a first dummy pixel arranged closest to the third point in the first direction by using the input grayscale value of the third point, wherein in the first direction, the first dummy pixel is the outermost pixel relative to the first point.

[0026] A ratio of the input gray value of the third point applied to the output gray value of the first dummy pixel may be equal to a ratio of the input gray value of the first point applied to the output gray value of the second shared pixel.

[0027] A ratio of the input gray value of the third point applied to the output gray value of the first dummy pixel may be greater than a ratio of the input gray value of the first point applied to the output gray value of the second shared pixel.

[0028] The first point may include a first shared pixel and a first dedicated pixel, the second point may further include a second dedicated pixel, the third point may include a third shared pixel and a third dedicated pixel, the first shared pixel and the second shared pixel may be configured to emit light with different colors, the first dedicated pixel, the second dedicated pixel and the third dedicated pixel may be configured to emit light with the same color, and the third shared pixel and the first dummy pixel may be configured to emit light with different colors.

[0029] The first shared pixel may be configured to emit light having a first color, the first dedicated pixel, the second dedicated pixel, and the third dedicated pixel may be configured to emit light having a second color, the second shared pixel may be configured to emit light having a third color, the third shared pixel may be configured to emit light having one of the first color and the third color, and the first dummy pixel may be configured to emit light having the remaining one of the first color and the third color.

[0030] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the concept of the invention.

[0032] Figure 1 is a schematic diagram of a display device according to an exemplary embodiment.

[0033] Figure 2 is a schematic circuit diagram of a pixel according to an exemplary embodiment.

[0034] Figure 3 is an exemplary illustration of the drive Figure 2 Pixel method diagram.

[0035] Figure 4 is a diagram for illustrating electrical connections between pixels.

[0036] Figure 5 is a diagram of a renderer according to an exemplary embodiment.

[0037] Figure 6 is a diagram for illustrating a gamma application unit according to an exemplary embodiment.

[0038] Figure 7 is a diagram for illustrating a rendering calculation unit according to an exemplary embodiment.

[0039] Figure 8 is a diagram for illustrating an inverse gamma application unit according to an exemplary embodiment.

[0040] Fig. 9 is a diagram of a pixel unit according to an exemplary embodiment.

[0041] Fig.10 It is shown Fig. 9 A diagram of a pixel cell where no edge processing is performed.

[0042] Fig.11 It is shown Fig. 9 A diagram of a pixel cell where left and right edge processing has been performed.

[0043] Fig.12 It is shown Fig. 9 A diagram of a pixel cell where left, right, top, and bottom edge processing has been performed.

[0044] Fig.13 is a diagram illustrating a structure of a pixel unit and a rendering method according to an exemplary embodiment.

[0045] Fig.14 It shows that the user feels Fig.13 A diagram of the shape of a pixel unit.

[0046] Fig.15 is a diagram illustrating a structure of a pixel unit and a rendering method according to an exemplary embodiment.

[0047] Fig.16 It shows that the user feels Fig.15 A diagram of the shape of a pixel unit.

[0048] Fig.17 is a diagram for illustrating a rendering calculation unit according to an exemplary embodiment.

[0049] Fig.18 is a diagram illustrating a structure of a pixel unit and a rendering method according to an exemplary embodiment.

[0050] Fig.19 It shows that the user feels Fig.18 A diagram of the shape of a pixel unit.

[0051] Fig. 20 is a diagram illustrating a structure of a pixel unit and a rendering method according to an exemplary embodiment.

[0052] Fig.21 It shows that the user feels Fig. 20 A diagram of the shape of a pixel unit. DETAILED DESCRIPTION

[0053] In the following description, for the purpose of explanation, many specific details are set forth to provide a thorough understanding of various exemplary embodiments or implementations of the present invention. "Embodiment" and "implementation" as used herein are interchangeable words, and these words are non-limiting examples of one or more devices or methods using the inventive concept disclosed herein. However, it is apparent that various exemplary embodiments can be practiced without these specific details or with one or more equivalent arrangements. In other examples, known structures and devices are shown in block diagram form to avoid unnecessary confusion of various exemplary embodiments. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, configuration and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0054] Unless otherwise specified, the exemplary embodiments shown will be understood as providing exemplary features of different details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise specified, the features, components, modules, layers, films, panels, regions and / or aspects of various embodiments (hereinafter individually or collectively referred to as "elements") can be combined, separated, interchanged and / or rearranged in other ways without departing from the inventive concept.

[0055] The use of cross hatching and / or shading in the drawings is generally provided to clarify the boundaries between adjacent elements. Thus, unless otherwise stated, the presence or absence of cross hatching or shading will not convey or indicate any preference or requirement for a particular material, material properties, size, ratio, commonality between the elements shown, and / or any other characteristics, attributes, performance, etc. of the elements. In addition, in the drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and / or description. When the exemplary embodiments can be implemented differently, the specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously or in an order opposite to the described order. In addition, similar reference numerals represent similar elements.

[0056] When an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, the element or layer may be directly on, directly connected to, or coupled to the other element or layer, or there may be intervening elements or layers. However, when an element or layer is referred to as being "directly on," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers. For this purpose, the term "connected" may indicate a physical, electrical, and / or fluid connection with or without intervening elements. In addition, the DR1-axis, DR2-axis, and DR3-axis are not limited to the three axes of a rectangular coordinate system (such as the x-axis, the y-axis, and the z-axis), and may be interpreted in a broader sense. For example, the DR1-axis, DR2-axis, and DR3-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purposes of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as any combination of only X, only Y, only Z, or two or more of X, Y, and Z, for example, XYZ, XYY, YZ, and ZZ. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0057] Although the terms "first", "second", etc. may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another element. Therefore, without departing from the teachings of the present disclosure, the first element discussed below may be referred to as the second element.

[0058] Spatially relative terms such as "beneath," "below," "under," "lower," "above," "upper," "over," "higher," and "side" (e.g., as in "sidewall"), etc., may be used herein for descriptive purposes and, therefore, describe the relationship of one element to another element as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "below" or "beneath" other elements or features would subsequently be oriented to be "above" the other elements or features. Thus, the exemplary term "below" may include both orientations of above and below. Furthermore, the device may be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and thus, the spatially relative descriptions used herein are interpreted accordingly.

[0059] The specialized terms used herein are for the purpose of describing specific embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, as used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms. In addition, when the terms "comprise", "comprising", "include", and / or "including" are used in this specification, they indicate the presence of the stated features, integers, steps, operations, elements, parts, and / or clusters thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or clusters thereof. It is also noted that, as used herein, the terms "substantially", "about", and other similar terms are used as terms of approximation rather than terms of degree, and thus, are used to explain the inherent deviations in measured values, calculated values, and / or provided values ​​that will be recognized by those of ordinary skill in the art.

[0060] As is customary in the art, some exemplary embodiments are shown and described in the accompanying drawings in terms of functional blocks, units and / or modules. Those skilled in the art will appreciate that these blocks, units and / or modules are physically implemented by electronic (or optical) circuits (such as logic circuits, discrete components, microprocessors, hard-wired circuits, memory elements and wiring connections that can be formed using semiconductor-based production techniques or other manufacturing techniques). In the case of blocks, units and / or modules implemented by microprocessors or other similar hardware, they can be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and can be selectively driven by firmware and / or software. It is also contemplated that each block, unit and / or module can be implemented by dedicated hardware, or a combination of dedicated hardware that performs some functions and a processor that performs other functions (e.g., one or more programmed microprocessors and associated circuits). Moreover, without departing from the scope of the inventive concept, each block, unit and / or module of some exemplary embodiments can be physically separated into two or more interactive and discrete blocks, units and / or modules. Furthermore, the blocks, units and / or modules of some exemplary embodiments may be physically combined into more complex blocks, units and / or modules without departing from the scope of the inventive concept.

[0061] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. Unless explicitly defined as such herein, terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense.

[0062] Figure 1 is a schematic diagram of a display device 10 according to an exemplary embodiment.

[0063] Reference Figure 1 , a display device 10 according to an exemplary embodiment may include a timing controller 11 , a data driver 12 , a scan driver 13 , an emission driver 14 , a pixel unit 15 , and a renderer 16 .

[0064] The timing controller 11 may receive input grayscale values ​​and control signals for image frames from an external processor. The renderer 16 may render the input grayscale values ​​to comply with the specification of the display device 10 .

[0065] For example, the image frame may include input grayscale values ​​of each point (e.g., input grayscale values ​​of a first color, input grayscale values ​​of a second color, and input grayscale values ​​of a third color). For example, the first color may be red, the second color may be green, and the third color may be blue. The image frame may not include input grayscale values ​​of dummy points, which will be described in more detail later.

[0066] According to an exemplary embodiment, each point of the pixel unit 15 may include some of the pixels of the first color, the pixels of the second color, and the pixels of the third color. For example, the first point may include only the pixels of the first color and the pixels of the second color, and the second point adjacent to the first point may include only the pixels of the second color and the pixels of the third color. In this case, instead of the first point, the pixels of the third color in the second point may display the input grayscale value of the third color in the first point. That is, the pixels of the third color in the second point may be shared between the second point and the first point. In addition, instead of the second point, the pixels of the first color in the first point may display the input grayscale value of the first color in the second point. That is, the pixels of the first color in the first point may be shared between the first point and the second point. For its part, the pixels of the first color (also referred to as "first color pixels") and the pixels of the third color (also referred to as "third color pixels") may be designated as shared pixels. In addition, the pixels of the second color (also referred to as "second color pixels") may be referred to as "dedicated pixels". Because the first point and the second point each require a second color pixel, when displaying the second color, support from adjacent points may not be required.

[0067] As described above, the process for rearranging input gray values ​​may be referred to as "rendering". The renderer 16 may generate output gray values ​​by rendering the input gray values. The timing controller 11 may provide control signals suitable for their respective specifications to the data driver 12, the scan driver 13, the emission driver 14, etc. to display an image frame.

[0068] The data driver 12 may generate data voltages to be supplied to the data lines D1, D2, D3, ..., and Dn by using the output grayscale value and the control signal. For example, the data driver 12 may sample the output grayscale value by using the clock signal, and may apply the data voltage corresponding to the output grayscale value to the data lines D1 to Dn for each pixel row (e.g., pixels connected to the same scan line). Here, n may be an integer greater than 0.

[0069] The scan driver 13 may receive a clock signal, a scan start signal, etc. from the timing controller 11 , and may then generate a scan signal to be supplied to the scan lines S1 , S2 , S3 , . . . , and Sm. Here, m may be an integer greater than 0.

[0070] The scan driver 13 may sequentially provide scan signals each having an on-level pulse to the scan lines S1, S2, S3, ... and Sm. The scan driver 13 may include a scan stage circuit configured in the form of a shift register. The scan driver 13 may generate a scan signal by sequentially transmitting a scan start signal having an on-level pulse to a next scan stage circuit under the control of a clock signal.

[0071] The emission driver 14 may receive a clock signal, an emission stop signal, etc. from the timing controller 11, and then may generate an emission signal to be provided to the emission lines E1, E2, E3, ... and Eo. For example, the emission driver 14 may sequentially provide emission signals each having an off-level pulse to the emission lines E1 to Eo. According to an exemplary embodiment, each emission stage circuit of the emission driver 14 may be configured in the form of a shift register, and may generate an emission signal in the form of an off-level pulse by sequentially transmitting the emission stop signal to the next emission stage circuit under the control of the clock signal. Here, "o" may be an integer greater than 0.

[0072] The pixel unit 15 may include pixels. Each pixel PXij may be connected to a data line, a scan line, and an emission line corresponding to the pixel PXij. In addition, the pixel PXij may be connected to a first power line and a second power line. Here, "i" and "j" may be integers greater than 0. Each pixel PXij may refer to a pixel to which a scan transistor is connected to the i-th scan line and the j-th data line.

[0073] Figure 2 is a schematic circuit diagram of a pixel PXij according to an exemplary embodiment.

[0074] Reference Figure 2 , the pixel PXij may include a transistor M1 , a transistor M2 , a transistor M3 , a transistor M4 , a transistor M5 , a transistor M6 , and a transistor M7 , a storage capacitor Cst, and a light emitting diode LD.

[0075] Hereinafter, a circuit configured by using a P-type transistor will be described as an example. However, the inventive concept is not limited thereto, and in some exemplary embodiments, the circuit may be configured by using an N-type transistor and changing the polarity of the voltage applied to the gate electrode of each transistor, or by using a combination of a P-type transistor and an N-type transistor. The term "P-type transistor" generally refers to a transistor through which an increased amount of current flows as the voltage difference between the gate electrode and the source electrode increases in a negative direction. The term "N-type transistor" generally refers to a transistor through which an increased amount of current flows as the voltage difference between the gate electrode and the source electrode increases in a positive direction. Each transistor may be implemented as any of various types of transistors, such as a thin film transistor (TFT), a field effect transistor (FET), and a bipolar junction transistor (BJT).

[0076] The transistor M1 has a gate electrode coupled to the first node N1, a first electrode coupled to the second node N2, and a second electrode coupled to the third node N3. The transistor M1 may be designated as a driving transistor.

[0077] The transistor M2 has a gate electrode coupled to the i-th scan line Si, a first electrode coupled to the data line Dj, and a second electrode coupled to the second node N2. The transistor M2 may be designated as a scan transistor.

[0078] The transistor M3 has a gate electrode coupled to the i-th scan line Si, a first electrode coupled to the first node N1, and a second electrode coupled to the third node N3. The transistor M3 may be designated as a diode-connected transistor.

[0079] The transistor M4 has a gate electrode coupled to the i-1th scan line S(i-1), a first electrode coupled to the first node N1, and a second electrode coupled to the initialization line INTL. In some exemplary embodiments, the gate electrode of the transistor M4 may be coupled to another scan line. The transistor M4 may be designated as a gate initialization transistor.

[0080] The transistor M5 has a gate electrode coupled to the i-th emission line Ei, a first electrode coupled to the first power line ELVDDL, and a second electrode coupled to the second node N2. The transistor M5 may be designated as a light emitting transistor. In some exemplary embodiments, the gate electrode of the transistor M5 may be coupled to another emission line.

[0081] The transistor M6 has a gate electrode coupled to the i-th emission line Ei, a first electrode coupled to the third node N3, and a second electrode coupled to the anode of the light emitting diode LD. The transistor M6 may be designated as a light emitting transistor. In some exemplary embodiments, the gate electrode of the transistor M6 may be coupled to another emission line.

[0082] The transistor M7 has a gate electrode coupled to the i-th scan line Si, a first electrode coupled to the initialization line INTL, and a second electrode coupled to the anode of the light emitting diode LD. The transistor M7 may be designated as an anode initialization transistor. In some exemplary embodiments, the gate electrode of the transistor M7 may be coupled to another scan line.

[0083] A first electrode of the storage capacitor Cst may be coupled to the first power line ELVDDL, and a second electrode thereof may be coupled to the first node N1.

[0084] The light emitting diode LD may have an anode coupled to the second electrode of the transistor M6 and a cathode coupled to the second power line ELVSSL. The light emitting diode LD may be implemented as an organic light emitting diode, an inorganic light emitting diode, a quantum dot light emitting diode, or the like.

[0085] A first power voltage may be applied to the first power line ELVDDL, a second power voltage may be applied to the second power line ELVSSL, and an initialization voltage may be applied to the initialization line INTL.

[0086] Figure 3 is an exemplary illustration of the drive Figure 2 FIG. 1 shows the method for pixels PXij.

[0087] First, a data voltage DATA(i-1)j for an i-1th pixel may be applied to the data line Dj, and a scan signal having a turn-on level (eg, a low level) may be applied to the i-1th scan line S(i-1).

[0088] Here, since a scan signal having an off level (eg, a high level) is applied to the i-th scan line Si, the transistor M2 is in an off state, thereby preventing the data voltage DATA(i-1)j for the i-1-th pixel from flowing into the pixel PXij.

[0089] When the transistor M4 is turned on, the first node N1 may be coupled to the initialization line INTL, and thus, the voltage of the first node N1 may be initialized. Since the emission signal having an off level is applied to the emission line Ei, the transistors M5 and M6 are in an off state, and thus, unnecessary emission of the light emitting diode LD that may be caused by a process for applying an initialization voltage is prevented.

[0090] Next, the data voltage DATAij for the i-th pixel PXij is applied to the data line Dj, and a scan signal having a conduction level is applied to the i-th scan line Si. Accordingly, the transistor M2, the transistor M1, and the transistor M3 are turned on (conducted), and thus, the data line Dj is electrically coupled to the first node N1. As such, a compensation voltage obtained by subtracting the threshold voltage of the transistor M1 from the data voltage DATAij may be applied to the second electrode (e.g., the first node N1) of the storage capacitor Cst, and the storage capacitor Cst maintains a voltage corresponding to the difference between the first power supply voltage and the compensation voltage. Such a period may be designated as a threshold voltage compensation period.

[0091] In this case, since the transistor M7 is in a turned-on state, the anode of the light emitting diode LD is coupled to the initialization line INTL, and the light emitting diode LD is precharged or initialized with charges corresponding to the difference between the initialization voltage and the second power supply voltage.

[0092] Thereafter, when an emission signal having a turn-on level is applied to the emission line Ei, the transistors M5 and M6 may be turned on (conducted). As such, a drive current path may be formed from the first power line ELVDDL to the transistor M5, the transistor M1, the transistor M6, the light emitting diode LD, and the second power line ELVSSL.

[0093] According to the voltage maintained in the storage capacitor Cst, the amount of driving current flowing through the first electrode and the second electrode of the transistor M1 can be adjusted. In this way, the light emitting diode LD can emit light with a brightness corresponding to the amount of driving current. The light emitting diode LD emits light until an emission signal with an off level is applied to the emission line Ei.

[0094] Figure 4 is a diagram for illustrating electrical connections between pixels.

[0095] refer to Figure 4 , a part of the pixel unit 15 is magnified and shown. Pixel A may be a first color pixel, pixel B may be a second color pixel, and pixel C may be a third color pixel.

[0096] exist Figure 4 , the positions of pixels A, B, and C are shown relative to respective light emitting surfaces (e.g., the light emitting (luminescent) material of a light emitting diode). As such, the positions of the pixel circuits of pixels A, B, and C may be similar to those of Figure 4 More specifically, reference will be made later to Figure 4 The position of a pixel described in conjunction with and subsequent drawings indicates the position of a light emitting surface of the pixel.

[0097] For example, when a scan signal with a turn-on level is applied to the i-th scan line Si, the pixel PXi(j-1) may store the data voltage applied to the j-1-th data line D(j-1), the pixel PXij may store the data voltage applied to the j-th data line Dj, and the pixel PXi(j+1) may store the data voltage applied to the j+1-th data line D(j+1).

[0098] The pixels coupled to the i-th scan line Si may be repeatedly arranged in the order of pixel A, pixel B, pixel C, and pixel B along the first direction DR1.

[0099] The pixels connected to the i+1th scan line S(i+1) may be repeatedly arranged in the order of pixel C, pixel B, pixel A, and pixel B along the first direction DR1, and the i+1th scan line S(i+1) is closest to the i-th scan line Si in the second direction DR2. The first direction DR1 and the second direction DR2 may be different directions. For example, the first direction DR1 and the second direction DR2 may be orthogonal to each other.

[0100] The first color, the second color, and the third color may be different colors. For example, the first color may be one of red, green, and blue, the second color may be one of red, green, and blue other than the first color, and the third color may be the remaining one of red, green, and blue other than the first color and the second color. However, the inventive concept is not limited thereto, and in some exemplary embodiments, the first to third colors may be magenta, cyan, and yellow instead of red, green, and blue. Hereinafter, the first color, the second color, and the third color will be exemplarily described as red, green, and blue, respectively.

[0101] Despite Figure 4 In the drawings and subsequent drawings, the light-emitting surfaces of pixel A, pixel B, and pixel C are shown as diamonds, however, the inventive concept is not limited thereto. For example, in some exemplary embodiments, the light-emitting surfaces of pixel A, pixel B, and pixel C may have various shapes, such as a circle, an ellipse, and a hexagon. In addition, although the light-emitting areas of pixel A and pixel C are shown as larger and the light-emitting area of ​​pixel B is shown as smaller in the drawings, in some exemplary embodiments, the light-emitting areas of pixel A, pixel B, and pixel C may be configured differently depending on the efficiency of the light-emitting material.

[0102] The structure of the pixel unit 15, for example Figure 4 As shown in , can be designated as a pentile structure or a diamond pentile structure.

[0103] Figure 5 is a diagram of the renderer 16 according to an exemplary embodiment. Figure 6 is a diagram for illustrating the gamma application unit 161 according to an exemplary embodiment. Figure 7 is a diagram for illustrating the rendering calculation unit 162 according to an exemplary embodiment. Figure 8 is a diagram for illustrating the inverse gamma application unit 163 according to an exemplary embodiment.

[0104] The renderer 16 according to an exemplary embodiment may include a gamma application unit 161 , a rendering calculation unit 162 , and an inverse gamma application unit 163 .

[0105] The gamma application unit 161 may generate a gamma grayscale value GGs by applying a gamma curve GCV to the input grayscale value GIs.

[0106] The gamma value of the gamma curve GCV, for example, gamma of 2.0, gamma of 2.2, or gamma of 2.4, may differ depending on the display device 10. In addition, in some exemplary embodiments, the user may set the gamma value of the gamma curve GCV.

[0107] Since the image frame displayed to the user reflects the gamma curve GCV, it is necessary to render the grayscale value based on the gamma grayscale value GGs reflected by the gamma curve GCV.

[0108] The rendering calculation unit 162 may generate the rendering grayscale value GRs by applying the rendering filter to the gamma grayscale value GGs. For example, the rendering filter may be represented by the following formula (1):

[0109] RF1=[K1 K2 K3] Formula (1).

[0110] Here, RF1 may represent a rendering filter, K1 may represent a coefficient to be multiplied by the gamma grayscale value of a left point (e.g., a point in a direction opposite to the first direction DR1), K2 may represent a coefficient to be multiplied by the gamma grayscale value of a target point, and K3 may represent a coefficient to be multiplied by the gamma grayscale value of a right point (e.g., a point in the first direction DR1).

[0111] The rendering filter to be applied to the gamma gray value of the first color and the rendering filter to be applied to the gamma gray value of the third color may be independent of each other. The rendering filter may not be applied to the gamma gray value of the second color.

[0112] For example, the rendering calculation unit 162 can generate the rendering gray value of the shared pixel C12 of the third color by adding the value obtained by multiplying K1 by the gamma gray value of the third color in the point DT11, the value obtained by multiplying K2 by the gamma gray value of the third color in the point DT12, and the value obtained by multiplying K3 by the gamma gray value of the third color in the point DT13.

[0113] Similarly, the rendering calculation unit 162 can generate a rendering gray value of the shared pixel A13 of the first color by adding a value obtained by multiplying K1 by the gamma gray value of the first color in point DT12, a value obtained by multiplying K2 by the gamma gray value of the first color in point DT13, and a value obtained by multiplying K3 by the gamma gray value of the first color in point DT14.

[0114] For example, the rendering calculation unit 162 may generate rendering grayscale values ​​of dedicated pixels B11, B12, B13, and B14 so that they are the same as the gamma grayscale values ​​of the second color of dedicated pixels B11, B12, B13, and B14.

[0115] For example, K1 may be 0.25, K2 may be 0.5, and K3 may be 0.25. However, due to the blurring problem, K1 may be set to 0.5, K2 may be set to 0.5, and K3 may be set to 0. As long as K1+K2+K3=1 is satisfied, K1, K2, and K3 may be set to various values.

[0116] The inverse gamma application unit 163 may generate output gray values ​​GOs by applying an inverse gamma curve IGCV to the input gray values ​​GIs.

[0117] Since the data driver 12 generates the data voltage by using the gamma voltage reflected by the gamma curve GCV, the gamma curve GCV should be prevented from being doubly reflected. The inverse gamma value of the inverse gamma curve IGCV may be the inverse of the gamma value of the gamma curve GCV.

[0118] Fig. 9 is a diagram of a pixel unit 15 according to an exemplary embodiment.

[0119] Reference Fig. 9 , the pixel unit 15 according to an exemplary embodiment may include dots DT1, DT2, DT3, DT4, and DT5. Each of the dots DT1, DT2, DT3, DT4, and DT5 may include one of the second color pixel B, the second color pixel B1, the second color pixel B2, the second color pixel B3, the second color pixel B4, and the second color pixel B5, and may also include one of the first color pixel A, the first color pixel A1, and the first color pixel A5 and one of the third color pixel C, the third color pixel C2, the third color pixel C3, and the third color pixel C4.

[0120] The first point DT1 may include a first shared pixel A1 and a first dedicated pixel B1. In a direction opposite to the first direction DR1, relative to the third point DT3, the first point DT1 may be the outermost point of the pixel unit 15. In a direction opposite to the first direction DR1, relative to the third point DT3, the first shared pixel A1 may be the outermost pixel of the pixel unit 15.

[0121] The second point DT2 may be disposed closest to the first point DT1 in the first direction DR1 and may include a second shared pixel C2 and a second dedicated pixel B2.

[0122] In the first direction DR1, the third point DT3 may be arranged from the second point DT2, and the third point DT3 may include a third shared pixel C3 and a third dedicated pixel B3. In the first direction DR1, the third point DT3 may be the outermost point of the pixel unit 15 relative to the first point DT1. In the first direction DR1, the third dedicated pixel B3 may be the outermost pixel of the pixel unit 15 relative to the first point DT1.

[0123] In the second direction DR2, a fourth point DT4 may be set from the first point DT1, and the fourth point DT4 may include a fourth shared pixel C4 and a fourth dedicated pixel B4. In the second direction DR2, relative to the first point DT1, the fourth point DT4 may be the outermost point of the pixel unit 15. In the second direction DR2, relative to the first point DT1, the fourth dedicated pixel B4 may be the outermost pixel of the pixel unit 15.

[0124] In the first direction DR1, the fifth point DT5 may be arranged from the fourth point DT4, and in the second direction DR2, the fifth point DT5 may be arranged from the third point DT3, and the fifth point DT5 may include a fifth shared pixel A5 and a fifth dedicated pixel B5. In the second direction DR2, relative to the third point DT3, the fifth point DT5 may be the outermost point of the pixel unit 15. In the second direction DR2, relative to the third point DT3, the fifth dedicated pixel B5 may be the outermost pixel of the pixel unit 15.

[0125] exist Fig. 9 In FIG. 1 , a pattern is displayed on the illuminated pixels based on the assumption that the edges of the pixel cells 15 are indicated as white.

[0126] Fig.10 It is shown Fig. 9 FIG. 15 is a diagram of a pixel unit 15 without edge processing, however, the edge of the pixel unit is indicated as white.

[0127] As used herein, the term "edge processing" refers to a process for reducing an output grayscale value of an outermost pixel, or a process for reducing a brightness value of an outermost pixel by an additional method.

[0128] When the left edge of the pixel unit 15 is properly mixed with the first color, the second color, and the third color, the left edge may be indicated as white.

[0129] However, in this case, the deviation of the second color may appear in the right edge of the pixel unit 15. For example, when the rendering filter [0.5 0.5 0] is applied to the third point DT3, there is no method capable of displaying the input grayscale value of the first color provided to the third point DT3. That is, the input grayscale value of the first color provided to the third point DT3 may be lost. In addition, when the rendering filter [0.5 0.5 0] is applied to the fifth point DT5, there is no method capable of displaying the input grayscale value of the third color provided to the fifth point DT5. That is, the input grayscale value of the third color provided to the fifth point DT5 may be lost. As such, the deviation of the second color may appear relatively strongly in the right edge of the pixel unit 15.

[0130] Fig.11 It is shown Fig. 9FIG. 15 is a diagram of a pixel cell 15 when left and right edge processing has been performed, however the edges of the pixel cell are indicated in white.

[0131] The timing controller 11 may process the right edge of the pixel unit 15 so that the brightness of the third dedicated pixel B3 is reduced while the brightness of the third shared pixel C3 in the third point DT3 is maintained. Similarly, the timing controller 11 may process the right edge of the pixel unit 15 so that the brightness of the fifth dedicated pixel B5 is reduced while the brightness of the fifth shared pixel A5 in the fifth point DT5 is maintained. Accordingly, at Fig.11 At the right edge of Fig.10 Compared with the case where the second color is not shown in FIG. 1 , the deviation of the second color can be alleviated (or weakened).

[0132] Meanwhile, when only the brightness at the right edge of the pixel unit 15 is reduced, a brightness difference between the left edge and the right edge of the pixel unit 15 may occur. As such, it may be necessary to reduce the brightness at the left edge of the pixel unit 15. Accordingly, while maintaining the brightness of the first dedicated pixel B1 in the first point DT1, the timing controller 11 may reduce the brightness of the first shared pixel A1. Similarly, while maintaining the brightness of the fourth dedicated pixel B4 in the fourth point DT4, the timing controller 11 may reduce the brightness of the fourth shared pixel C4. In this case, a slight deviation of the second color may additionally appear in Fig.11 At the left edge of the pixel unit 15 shown in .

[0133] Fig.12 It is shown Fig. 9 FIG. 15 is a diagram of a pixel unit 15 when left, right, upper and lower edge processing is performed, however, the edges of the pixel unit are indicated in white.

[0134] Fig.12 In addition to the reference Fig.11 In addition to the left and right edge processing shown, there is also a case where upper and lower edge processing is performed on the pixel unit 15. Since the brightness of each of the first shared pixel A1, the second shared pixel C2, and the third shared pixel C3 is reduced at the upper edge, a slight deviation of the second color may additionally appear in the upper edge of the pixel unit 15. In addition, since the brightness of each of the dedicated pixel B, the dedicated pixel B4, and the dedicated pixel B5 is reduced at the lower edge, a slight deviation of the combination of the first color and the third color may appear in the lower edge of the pixel unit 15.

[0135] Fig.13 is a diagram illustrating a structure of a pixel unit 15 a and a rendering method according to an exemplary embodiment.

[0136] Reference Fig.13According to the exemplary embodiment, the pixel unit 15a has a dummy point DDT1 and a dummy point DDT2 added to Fig. 9 1 and 2. The pixel unit 15a of the illustrated exemplary embodiment is substantially similar to the pixel unit 15 described above except for the dummy dots DDT1 and DDT2, and thus repeated description of substantially the same elements will be omitted to avoid redundancy. Each of the dummy dots DDT1 and DDT2 does not include a second color pixel.

[0137] The first dummy dot DDT1 may be arranged closest to the third dot DT3 in the first direction DR1 and may include a first dummy pixel AD1. The first dummy pixel AD1 may be an outermost pixel with respect to the first dot DT1 in the first direction DR1.

[0138] The second dummy dot DDT2 may be arranged closest to the fifth dot DT5 in the first direction DR1, and may be arranged from the first dummy dot DDT1 in the second direction DR2, and may include a second dummy pixel CD2. The second dummy pixel CD2 may be the outermost pixel relative to the fourth dot DT4 in the first direction DR1.

[0139] One or more dummy dots may be inserted between the first dummy dot DDT1 and the second dummy dot DDT2. Colors of adjacent dummy pixels may be different from each other.

[0140] The first shared pixel A1 and the second shared pixel C2 may be pixels of different colors, and the first dedicated pixel B1, the second dedicated pixel B2 and the third dedicated pixel B3 may be pixels of the same color. The third shared pixel C3 and the first dummy pixel AD1 may be pixels of different colors. The fifth shared pixel A5 and the second dummy pixel CD2 may be pixels of different colors.

[0141] The second dummy pixel CD2 may be the outermost pixel with respect to the first dummy dot DDT1 in the second direction DR2. The fourth dedicated pixel B4 may be the outermost pixel with respect to the first dot DT1 in the second direction DR2.

[0142] The light emitting area of ​​the first dummy pixel AD1 may be substantially the same as the light emitting area of ​​the first shared pixel A1. The light emitting area of ​​the second dummy pixel CD2 may be substantially the same as the light emitting area of ​​the fourth shared pixel C4.

[0143] For example, when the rendering filter [0.5 0.5 0] is applied to the pixel unit 15a, the renderer 16 may generate an output grayscale value of the second shared pixel C2 by using the input grayscale values ​​of the same color (e.g., the third color) in the first point DT1 and the second point DT2. In this case, a ratio (e.g., a ratio) of the input grayscale value of the first point DT1 applied to the output grayscale value of the second shared pixel C2 may be 0.5, and a ratio of the input grayscale value of the second point DT2 applied thereto may be 0.5.

[0144] In addition, the renderer 16 may generate an output gray value of the first dummy pixel AD1 by using the input gray value of the third point DT3. In this case, the ratio of the input gray value of the third point DT3 applied to the output gray value of the first dummy pixel AD1 may be 0.5, and the ratio of the input gray value of the first dummy point DDT1 applied thereto may be 0.5. Since the image frame does not include the input gray value of the first dummy point DDT1, the output gray value of the first dummy pixel AD1 may be affected only by the input gray value of the third point DT3.

[0145] More specifically, the ratio of the input gray value of the third point DT3 applied to the output gray value of the first dummy pixel AD1 may be the same as the ratio of the input gray value of the first point DT1 applied to the output gray value of the second shared pixel C2. That is, since the pixel unit 15a may use the same rendering filter [0.5 0.5 0] as the pixel unit 15 without change, the renderer 16 may not need to be reorganized even if the display device 10 adopts the pixel unit 15a.

[0146] In this way, the input grayscale value of the first color supplied to the third point DT3 can be displayed by the first dummy pixel AD1. In addition, the input grayscale value of the third color supplied to the fifth point DT5 can be displayed by the second dummy pixel CD2. As such, even if edge processing is not performed in the pixel unit 15a according to the illustrated exemplary embodiment, such as Fig.10 As such, since edge processing itself is not required, no color shift such as Fig.11 and Fig.12 Color cast shown.

[0147] Fig.14 It shows that the user feels Fig.13 FIG. 1 is a diagram showing the shape of the pixel unit 15 a.

[0148] Reference Fig.14 , which can be split Fig.14The pixel unit 15a shown in FIG. 1 defines a virtual point VDTa, which can be a point that the user can actually feel (or see). Each virtual point VDTa can represent a fine pattern with the same image quality based on the dedicated pixel B, dedicated pixel B1, dedicated pixel B2, dedicated pixel B3, dedicated pixel B4 and dedicated pixel B5 of the second color.

[0149] In addition, the thicknesses of the left and right edges may be uniformly indicated by a virtual point VDTa.

[0150] Fig.15 is a diagram illustrating a structure and a rendering method of a pixel unit 15 a ′ according to an exemplary embodiment.

[0151] Reference Fig.15 , the pixels and dummy pixels in the pixel unit 15a' may be arranged in parallel with Fig.13 At the same position of pixel unit 15a.

[0152] However, in the pixel unit 15a' according to the example shown, the light-emitting areas of the pixel A', pixel A1', pixel C' and pixel C4' arranged at the left edge and the right edge of the pixel unit 15a' and the dummy pixel AD', dummy pixel AD1', dummy pixel CD' and dummy pixel CD2' may be smaller than those of the shared pixel A and the shared pixel C which are not arranged at the edge.

[0153] For example, the light emitting area of ​​the first shared pixel A1' may be smaller than the light emitting area of ​​the second shared pixel C2. In addition, the light emitting area of ​​the first dummy pixel AD1' may be smaller than the light emitting area of ​​the third shared pixel C3. For example, the light emitting area of ​​the first shared pixel A1' may be about half of the light emitting area of ​​the second shared pixel C2. In addition, the light emitting area of ​​the first dummy pixel AD1' may be about half of the light emitting area of ​​the third shared pixel C3.

[0154] For example, when the rendering filter [0.5 0.5 0] can be applied to the pixel unit 15a' in the same manner, the same driving current as that of the pixel unit 15a can be provided to the pixels A', A1', C', and C4' and the dummy pixels AD', AD1', CD', and CD2' arranged at the left and right edges. In this case, in each of the pixels A', A1', C', and C4' and the dummy pixels AD', AD1', CD', and CD2' arranged at the left and right edges of the pixel unit 15a', the increase in brightness per unit area can be compensated by the brightness reduced from its smaller light emitting area. As such, for example, even if the rendering filter [0.5 0.5 0] is applied to the pixel unit 15a' in the same manner, the pixel unit 15a' according to the illustrated exemplary embodiment can be displayed similarly to the display in the pixel unit 15a.

[0155] In some exemplary embodiments, when the points DT2, DT3, and DT5 located in the remaining area except the edge of the pixel unit 15a' are designated as target points, the rendering filter [0.5 0.5 0] may be applied. However, when the points DT1' and DT4' located at the left edge and the right edge and the dummy points DDT1' and DDT2' are designated as target points, the rendering filter [11 0] may be applied. More specifically, the ratio of the input gray value of the third point DT3 applied to the output gray value of the first dummy pixel AD1' (e.g., K1=1) may be greater than the ratio of the input gray value of the first point DT1' applied to the output gray value of the second shared pixel C2 (e.g., K1=0.5). In this case, the output of the amplifier that applies the data voltage to the data line connected to the dummy pixel AD', the dummy pixel AD1', the dummy pixel CD', and the dummy pixel CD2' may be less than the output of the amplifier that applies the data voltage to the data line connected to the second shared pixel C2 (e.g., 1 / 2). The amplifier may be included in the buffer unit of the data driver 12 .

[0156] The above description is equally applicable to shared pixels A', A1', C', and C4' at the left edge. As such, the pixel unit 15a' according to the illustrated exemplary embodiment can prevent pixels and dummy pixels at the left and right edges from being degraded due to overcurrent.

[0157] Fig.16 It shows that the user feels Fig.15 FIG. 1 is a diagram showing the shape of the pixel unit 15 a ′.

[0158] Reference Fig.16 , which can be split Fig.16The pixel unit 15a' is used to define a virtual point VDTa', which can be a point that the user can actually feel. Each virtual point VDTa' can represent a fine pattern with the same image quality based on the dedicated pixel B, dedicated pixel B1, dedicated pixel B2, dedicated pixel B3, dedicated pixel B4 and dedicated pixel B5 of the second color.

[0159] In addition, the areas of the respective virtual points VDTa' of the pixel unit 15a' may be substantially the same as each other. As such, the pixel unit 15a' according to the illustrated exemplary embodiment may accurately represent a fine pattern.

[0160] Fig.17 is a diagram for illustrating the rendering calculation unit 162 according to an exemplary embodiment.

[0161] The rendering calculation unit 162 may use a rendering filter, such as shown in the following formula (2):

[0162]

[0163] Here, RF2 may be a rendering filter, L5 may be a coefficient to be multiplied by the gamma grayscale value of the target point, L1 may be a coefficient to be multiplied by the gamma grayscale value of the upper left point, L2 may be a coefficient to be multiplied by the gamma grayscale value of the upper point, L3 may be a coefficient to be multiplied by the gamma grayscale value of the upper right point, L4 may be a coefficient to be multiplied by the gamma grayscale value of the left point, L6 may be a coefficient to be multiplied by the gamma grayscale value of the right point, L7 may be a coefficient to be multiplied by the gamma grayscale value of the lower left point, L8 may be a coefficient to be multiplied by the gamma grayscale value of the lower point, and L9 may be a coefficient to be multiplied by the gamma grayscale value of the lower right point.

[0164] For example, L1=0, L2=0.125, L3=0, L4=0.125, L5=0.5, L6=0.125, L7=0, L8=0.125, and L9=0 may be satisfied. However, in order to prevent the above-mentioned fuzzy problem, L1=0.25, L2=0.25, L3=0, L4=0.25, L5=0.25, L6=0, L7=0, L8=0, and L9=0 may be satisfied. However, the inventive concept is not limited thereto, and L1 to L9 may be set to various values ​​as long as the relationship of L1+L2+L3+L4+L5+L6+L7+L8+L9=1 is satisfied.

[0165] The process for applying the rendering filter is the same as above. Figure 7 The processes shown are similar, and therefore, a repeated description thereof will be omitted.

[0166] Fig.18 is a diagram illustrating a structure and a rendering method of a pixel unit 15b according to an exemplary embodiment.

[0167] Reference Fig.18 , the pixel unit 15b according to the exemplary embodiment shown includes an Fig.13 The pixel unit 15a of the exemplary embodiment shown in FIG. 1 is provided with dummy dots DDT3, DDT4 and DDT5 at the lower edge of the pixel unit 15a. Fig.13 The pixel units 15a of FIG. 1 are substantially the same, and thus, repeated description of substantially similar elements will be omitted to avoid redundancy. Each of the dummy dots DDT3, DDT4, and DDT5 may not include a second color pixel.

[0168] In the second direction DR2, the third dummy dot DDT3 may be arranged closest to the fourth dot DT4, and the third dummy dot DDT3 may include the third dummy pixel AD3. The fourth shared pixel C4 and the third dummy pixel AD3 may be pixels of different colors.

[0169] In the first direction DR1, the fourth dummy dot DDT4 may be arranged from the third dummy dot DDT3, and in the second direction DR2, the fourth dummy dot DDT4 may be arranged closest to the fifth dot DT5, and the fourth dummy dot DDT4 may include a fourth dummy pixel CD4. The fifth shared pixel A5 and the fourth dummy pixel CD4 may be pixels of different colors.

[0170] In the first direction DR1, the fifth dummy dot DDT5 may be arranged closest to the fourth dummy dot DDT4, and in the second direction DR2, the fifth dummy dot DDT5 may be arranged closest to the second dummy dot DDT2, and the fifth dummy dot DDT5 may include a fifth dummy pixel AD5. The fourth dummy pixel CD4 and the second dummy pixel CD2 may be pixels of the same color. The fourth dummy pixel CD4 and the fifth dummy pixel AD5 may be pixels of different colors.

[0171] The third dummy pixel AD3 may be the outermost pixel relative to the first point DT1 in the second direction DR2. The fourth dummy pixel CD4 may be the outermost pixel relative to the third point DT3 in the second direction DR2. The fifth dummy pixel AD5 may be the outermost pixel relative to the first dummy point DDT1 in the second direction DR2, and the fifth dummy pixel AD5 may be the outermost pixel relative to the third dummy point DDT3 in the first direction DR1.

[0172] According to an exemplary embodiment, loss of input grayscale values ​​that may occur when a rendering filter such as that shown in formula (2) is applied to the pixel unit 15b can be prevented, and thus, color shift can be avoided. Since the configuration and operation of the pixel unit 15b according to the illustrated exemplary embodiment are similar to those of the reference Fig.13 The configuration and operation of the illustrated pixel unit 15 a are substantially similar, and therefore, a repeated description thereof will be omitted.

[0173] Fig.19 It shows that the user feels Fig.18 FIG. 1 is a diagram showing the shape of the pixel unit 15b.

[0174] Reference Fig.19 , which can be split Fig.19 The virtual point VDTb is defined by the pixel unit 15b of the second color, and the virtual point VDTb can be a point that the user can actually feel. Each virtual point VDTb can represent a fine pattern with the same image quality based on the dedicated pixel B, dedicated pixel B1, dedicated pixel B2, dedicated pixel B3, dedicated pixel B4 and dedicated pixel B5 of the second color.

[0175] In addition, the thicknesses of the upper side edge, the lower side edge, the left side edge, and the right side edge of the pixel unit 15 b may be uniformly indicated.

[0176] Fig. 20 is a diagram illustrating a structure and a rendering method of a pixel unit 15 b ″ according to an exemplary embodiment.

[0177] Reference Fig. 20 , the pixels and dummy pixels of the pixel unit 15b' according to the illustrated exemplary embodiment may be arranged in parallel with Fig.18 At substantially the same position of pixel unit 15b.

[0178] However, in the pixel unit 15b", the light emitting areas of the pixels A", C", C2", C3", C4" and the dummy pixels AD", CD", CD2", CD4" arranged at the upper edge, lower edge, left edge and right edge of the pixel unit 15b" may be smaller than those of the shared pixels A and C which are not arranged at the edge. In addition, the light emitting areas of the pixels A", C", C2", C3", C4" and the dummy pixels AD", CD", CD2", CD4" may be smaller than those of the shared pixels A and C which are not arranged at the edge. Fig. 20 The light-emitting areas of the pixel A1” at the corner of the pixel unit 15b” and the dummy pixel AD1”, dummy pixel AD3” and dummy pixel AD5” may be smaller than those of the pixel A”, pixel C”, pixel C2”, pixel C3” and pixel C4” and the dummy pixel AD”, dummy pixel CD”, dummy pixel CD2” and dummy pixel CD4” arranged at the upper edge, lower edge, left edge and right edge.

[0179] For example, the light emitting area of ​​the fifth shared pixel A5 may be greater than that of the second dummy pixel CD2 ″, and the light emitting area of ​​the second dummy pixel CD2 ″ may be greater than that of the fifth dummy pixel AD5 ″.

[0180] A rendering filter that is the same as or different from that of the pixel unit 15b may be applied to the pixel unit 15b'. As such, a related description thereof will be omitted.

[0181] Fig.21 It shows that the user feels Fig. 20 FIG. 15 is a diagram showing the shape of pixel unit 15b”.

[0182] Reference Fig.21 , which can be split Fig.21 The pixel unit 15b" is used to define a virtual point VDTb", which can be a point that the user can actually feel. Each virtual point VDTb" can represent a fine pattern with the same image quality based on a dedicated pixel B, a dedicated pixel B1, a dedicated pixel B2, a dedicated pixel B3, a dedicated pixel B4 and a dedicated pixel B5 of the second color.

[0183] In addition, the areas of the respective virtual points VDTb" of the pixel unit 15b" are substantially the same as each other, and the pixel unit 15b" according to the illustrated exemplary embodiment can accurately represent a fine pattern.

[0184] A display device and a method of driving the display device according to exemplary embodiments may prevent color shift from occurring at an edge of a pixel unit.

[0185] Although certain exemplary embodiments and implementations have been described herein, other embodiments and variations will be apparent from this description. Accordingly, it will be apparent to those skilled in the art that the inventive concept is not limited to these embodiments, but to the broader scope of the appended claims and various obvious variations and equivalent arrangements.

Claims

1. A display device, comprising: a first point, the first point comprising a first shared pixel and a first dedicated pixel; a second point, the second point being arranged closest to the first point in the first direction, and the second point including a second shared pixel and a second dedicated pixel; a third point, arranged from the second point in the first direction, and including a third shared pixel and a third dedicated pixel; as well as a first dummy point, the first dummy point being arranged closest to the third point in the first direction, and the first dummy point comprising a first dummy pixel; in: The first shared pixel and the second shared pixel are configured to emit light having different colors; The first dedicated pixel, the second dedicated pixel, and the third dedicated pixel are configured to emit light having a same color; The third shared pixel and the first dummy pixel are configured to emit light having different colors; In the first direction, relative to the first point, the first dummy pixel is the outermost pixel; The image frame includes the input grayscale value of the first point, the input grayscale value of the second point and the input grayscale value of the third point, and the image frame does not include the input grayscale value of the first dummy point; The display device further includes a renderer configured to generate an output grayscale value of the second shared pixel by using input grayscale values ​​of the same color in the first point and the second point, and the renderer is further configured to generate an output grayscale value of the first dummy pixel by using the input grayscale value of the third point; and A first ratio of the input gray value of the third point applied to the output gray value of the first dummy pixel is greater than a second ratio of the input gray value of the first point applied to the output gray value of the second shared pixel.

2. The display device according to claim 1, further comprising: a fourth point, arranged in a second direction from the first point, and including a fourth shared pixel and a fourth dedicated pixel; a fifth point, the fifth point being arranged in the first direction from the fourth point and in the second direction from the third point, the fifth point including a fifth shared pixel and a fifth dedicated pixel; as well as a second dummy point, the second dummy point being arranged closest to the fifth point in the first direction, and the second dummy point being arranged in the second direction from the first dummy point, the second dummy point including a second dummy pixel, The fifth shared pixel and the second dummy pixel are configured to emit light having different colors.

3. The display device according to claim 2, wherein: In the first direction, the second dummy pixel is an outermost pixel relative to the fourth point.

4. The display device according to claim 3, wherein: In the second direction, the second dummy pixel is an outermost pixel relative to the first dummy point; and In the second direction, the fourth dedicated pixel is the outermost pixel relative to the first point.

5. The display device according to claim 1, wherein: A light emitting area of ​​the first shared pixel is smaller than a light emitting area of ​​the second shared pixel; and A light emitting area of ​​the first dummy pixel is smaller than a light emitting area of ​​the third shared pixel.

6. The display device according to claim 3, further comprising: a third dummy point, the third dummy point being arranged closest to the fourth point in the second direction, and the third dummy point including a third dummy pixel; The fourth shared pixel and the third dummy pixel are configured to emit light having different colors.

7. A method for driving a display device, comprising: receiving respective input grayscale values ​​of a first point, a second point arranged closest to the first point in a first direction, and a third point arranged from the second point in the first direction; generating an output gray value of a second shared pixel included in the second point by using input gray values ​​of the same color in the first point and the second point; as well as generating an output grayscale value of a first dummy pixel of a first dummy point arranged closest to the third point in the first direction by using the input grayscale value of the third point, wherein, in the first direction, relative to the first point, the first dummy pixel is an outermost pixel; The image frame includes the input grayscale value of the first point, the input grayscale value of the second point, and the input grayscale value of the third point, and the image frame does not include the input grayscale value of the first dummy point; and A first ratio of the input gray value of the third point applied to the output gray value of the first dummy pixel is greater than a second ratio of the input gray value of the first point applied to the output gray value of the second shared pixel.

Images