Display device and compensation method thereof

Abstract

A display device and a compensation method thereof are disclosed. The display device includes a display device of a multiplexer and a driving method thereof. The display device includes: a substrate having a red sub-pixel, a first green sub-pixel, a second green sub-pixel and a blue sub-pixel; a driving thin film transistor on the substrate, the driving thin film transistor being located in each of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel; and a light emitting diode connected to the driving thin film transistor and located in each of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel, wherein the light emitting diodes of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel respectively include a red light emitting area, a first green light emitting area, a second green light emitting area and a blue light emitting area, wherein the first green light emitting area has a cross shape.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2020-0186472, filed on December 29, 2020, which is hereby incorporated by reference in its entirety. Technical Field

[0003] The present invention relates to a display device, and more particularly, to a display device including red sub-pixels, green sub-pixels and blue sub-pixels and a method for compensating a display device, wherein the red sub-pixels, green sub-pixels and blue sub-pixels have shapes in which moiré is minimized in camera compensation. Background Art

[0004] With the development of information-oriented society, the demand for display devices for displaying images has increased in various forms. In the field of display devices, cathode ray tubes (CRTs) with relatively large volumes are rapidly replaced by flat panel display (FPD) devices with thin profiles, light weight, and suitable for relatively large sizes. FPD devices include liquid crystal display (LCD) devices, plasma display panels (PDPs), organic light emitting diode (OLED) display devices, and field luminescent display (FED) devices.

[0005] Among FPD devices, OLED display devices use light emitting diodes that emit light corresponding to data voltages to display images. Since the light emitting layer of the light emitting diodes is formed of organic materials, the light emitting diodes have brightness deviation in the display panel, and the brightness deviation causes degradation such as stains.

[0006] In order to solve the above problem, a camera compensation method is proposed, in which position brightness is detected by photographing a display image of a completed display panel with a camera and image data is modulated to compensate for the deviation of the position brightness.

[0007] In the camera compensation method, a captured photographic image has interference fringe such as moire due to interference between multiple sub-pixels of a display panel and multiple sensors of a camera, and degradation such as real stains of the display panel may not be compensated due to the interference fringe.

[0008] In order to prevent the occurrence of disturbing fringes such as moire, the camera compensation method is performed within a range where the modulation transfer function (MTF) representing the reproducibility of the captured photographic image relative to the original display image has a relatively low value. Since an accurate photographic image cannot be obtained, the compensation performance is reduced. As a result, minute stains of the display panel cannot be properly compensated. Summary of the invention

[0009] Accordingly, the present invention is directed to a display device that substantially obviates one or more problems due to limitations and disadvantages of the related art.

[0010] In addition, the present invention is intended to provide a display device and a method for compensating a display device, wherein the high-frequency component of the moire frequency is reduced, the moire is eliminated, and tiny stains are compensated because the light-emitting area of ​​the cross-shaped green sub-pixel has an increased width in the horizontal and vertical directions.

[0011] In addition, the present invention is intended to provide a display device and a method for compensating a display device, wherein the high-frequency component of the moire frequency is reduced due to the light-emitting area of ​​the cross-shaped green sub-pixel having an increased width in the horizontal and vertical directions, the frequency component of the original frequency in the horizontal and vertical directions is reduced, the moire is eliminated, and tiny stains are compensated.

[0012] Additional features and advantages of the present invention will be described in the following description, some of which will be apparent from the description or can be understood through the practice of the present invention. These and other advantages of the present invention can be realized and obtained through the structures specifically pointed out in the specification, claims and drawings.

[0013] To achieve these and other advantages and in accordance with the intent of the present invention, as embodied and broadly described herein, a display device includes: a substrate having a red sub-pixel, a first green sub-pixel, a second green sub-pixel and a blue sub-pixel; a driving thin film transistor on the substrate, the driving thin film transistor being located in each of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel; and a light emitting diode connected to the driving thin film transistor and located in each of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel, wherein the light emitting diodes of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel respectively include a red light emitting area, a first green light emitting area, a second green light emitting area and a blue light emitting area, wherein the first green light emitting area has a cross shape.

[0014] On the other hand, a method for compensating a display device includes: displaying a display image using a display device having a red sub-pixel, a first green sub-pixel, a second green sub-pixel, and a blue sub-pixel; generating a photographic image by capturing the display image using a camera including a plurality of sensors; eliminating moiré from the photographic image using a panel frequency calculated based on a panel period of the first green sub-pixel and the second green sub-pixel and a sensor frequency calculated based on a sensor period of the plurality of sensors; calculating a brightness compensation value by comparing a measured brightness of the photographic image with a target brightness; and generating compensated image data by applying the brightness compensation value to image data.

[0015] On the other hand, a display device includes: a first sub-pixel, a second sub-pixel, and a third sub-pixel that respectively emit light of a first color, light of a second color, and light of a third color; and corresponding light-emitting diodes that are respectively arranged in each of the first sub-pixel, the second sub-pixel, and the third sub-pixel and have a first color light-emitting area, a second color light-emitting area, and a third color light-emitting area, respectively, wherein the first color light-emitting area and the second color light-emitting area have a square shape, and the third color light-emitting area has a cross shape.

[0016] 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

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate various aspects of the invention and together with the description serve to explain the principle of the invention. In the drawings:

[0018] Figure 1 is a view showing a compensation method of a display device according to a first embodiment of the present invention;

[0019] Figure 2 is a cross-sectional view showing a display panel of a display device according to a first embodiment of the present invention;

[0020] Figure 3 is a plan view showing a display panel of a display device according to a first embodiment of the present invention;

[0021] Figure 4 is a plan view showing a display panel of a display device according to a second embodiment of the present invention;

[0022] Figure 5A , 5B 5A and 5B are views showing a light emitting region structure, a brightness profile, and a frequency domain of a sub-pixel according to a first comparative example, respectively;

[0023] Fig. 6A , 6B 6C are views showing a light emitting region structure, a brightness profile, and a frequency domain of a sub-pixel according to a second comparative example, respectively;

[0024] Fig. 7A , 7B 7C are views showing a light emitting region structure, a brightness profile, and a frequency domain of a sub-pixel according to a first embodiment of the present invention, respectively;

[0025] Fig. 8A , 8B 8C are views showing a light emitting region structure, a brightness profile, and a frequency domain of a sub-pixel according to a second embodiment of the present invention, respectively;

[0026] Fig. 9A is a view showing sub-pixels, light emitting region structures and frequency domain coordinates regarding a first comparative example; Fig. 9B is a diagram showing a sub-pixel, an original frequency, and a moire frequency of a light emitting area with respect to a first comparative example; Fig. 9C yes Fig. 9B A magnified image of

[0027] Fig.10 is a view showing processing of a second moire frequency of a compensation method of a display device according to a first embodiment of the present invention;

[0028] Fig.11 is a view showing a process of a third moire frequency of the compensation method of the display device according to the first embodiment of the present invention;

[0029] Fig.12 is a view showing a process of a first moire frequency of a compensation method of a display device according to a first embodiment of the present invention;

[0030] Fig.13 is a view showing a process of a first moire frequency of a compensation method of a display device according to a first embodiment of the present invention;

[0031] Fig.14 is a view showing processing of a first moire frequency of a compensation method of a display device according to first and second embodiments of the present invention;

[0032] Fig.15A and 15B They are views showing states before and after moire elimination through sampling processing of the display devices according to the first and second embodiments of the present invention, respectively. DETAILED DESCRIPTION

[0033] Now will be described in detail with reference to many aspects of the present invention, some examples of which are shown in the accompanying drawings. In the following description, when the detailed description of the known functions or structures related to this article is determined to be unnecessary to blur the main points of the inventive concept, its detailed description will be omitted. The process of the described processing steps and / or operations is an example, and the order of the steps and / or operations is not limited to what is described herein, but can be changed as known in the art, unless the steps and / or operations must occur in a specific order. Similar reference numerals refer to similar elements throughout the text. The names of the elements used in the following description are selected only for the convenience of writing the specification, so these names may be different from those used in the actual product.

[0034] The advantages and features of the present invention and methods for achieving these advantages and features will become clear through the exemplary aspects described below with reference to the accompanying drawings. However, the present invention can be implemented in different forms and should not be construed as being limited to the exemplary aspects set forth herein. Rather, these exemplary aspects are provided to make the disclosure of the present invention sufficient and complete to help those skilled in the art to fully understand the scope of the present invention. In addition, the present invention is limited only by the scope of the appended claims.

[0035] The shapes, sizes, proportions, angles, and quantities disclosed in the accompanying drawings for describing various aspects of the present invention are merely examples. Therefore, the present invention is not limited to the details shown in the drawings. The same reference numerals represent the same elements throughout the application. In the following description of the present invention, when a detailed description of a related known function or structure is determined to unnecessarily obscure the focus of the present invention, the detailed description of such known function or structure may be omitted. In the case of using the terms "including", "having" and "comprising" described in this specification, other components may be added unless more restrictive terms such as "only" are used.

[0036] When explaining an element, the element is interpreted as including an error or tolerance range even if there is no explicit description of such error or tolerance range. When describing a positional relationship, when the positional relationship between two parts is described as, for example, "on", "above", "below", or "after", one or more other parts may be provided between the two parts, unless more restrictive terms such as "immediately" or "directly" are used.

[0037] When describing a temporal relationship, when the temporal order is described as, for example, "after", "subsequently", "next" or "before", discontinuous situations may be included unless more restrictive terms such as "directly", "immediately" or "directly" are used.

[0038] It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from other elements. For example, a first element may be named a second element, and similarly, a second element may be named a first element without departing from the scope of the present invention.

[0039] When describing the elements of the present invention, terms such as "first", "second", "A", "B", "(a)" and "(b)" may be used. These terms are only used to distinguish one element from other elements, and the nature, order, sequence or number of the corresponding elements should not be limited by these terms. In addition, when an element or layer is described as being "connected to", "bonded to" or "adhered to" another element or layer, it may be directly connected or adhered to the other element or layer, and may be indirectly connected or adhered to the other element or layer (with one or more intermediate elements or layers "disposed" between them).

[0040] The term "at least one" should be understood to include any one or all combinations of one or more of the relevant listed items. For example, the meaning of "at least one of the first item, the second item and the third item" means the combination of all items selected from two or more of the first item, the second item and the third item as well as the first item, the second item or the third item.

[0041] When describing various aspects, when one structure is described as being "on or above" or "below or below" another structure, this description should be interpreted as including a case where these structures are in contact with each other and a case where a third structure is disposed therebetween. The size and thickness of each element shown in the drawings are given only for the convenience of description, and various aspects of the present invention are not limited thereto.

[0042] The features of the various embodiments of the present invention may be combined or combined with each other in part or in whole, and may be technically interoperable and driven with each other in various ways, as can be fully understood by those skilled in the art. The various aspects of the present invention may be implemented independently of each other, or implemented together in a mutually dependent relationship.

[0043] Hereinafter, details of the present invention will be described in detail, some examples of which are shown in the accompanying drawings.

[0044] Figure 1 2 is a view showing a compensation method of a display device according to a first embodiment of the present invention. The display device may include an organic light emitting diode (OLED) display device.

[0045] exist Figure 1In the embodiment, the camera 170 is disposed on the display panel 120 of the display device 110 according to the first embodiment of the present invention. The camera 170 captures a displayed image of the display panel 120 to generate a photographic image including positional measured luminance.

[0046] Next, the position brightness compensation value is calculated by comparing the position measured brightness with the target brightness.

[0047] For example, when the measured brightness is less than the target brightness, a position brightness compensation value may be calculated; and when the measured brightness is greater than the target brightness, a negative brightness compensation value may be calculated.

[0048] Next, the calculated positional brightness compensation value is stored in the storage section 154 of the printed circuit board 156 of the display device 110. The driving section 150 of the flexible printed circuit 152 of the display device 110 generates compensated image data by applying the positional brightness compensation value of the storage section 154 to the image data, and provides a data voltage corresponding to the compensated image data to the display panel 120.

[0049] For example, the driving part 150 may generate compensated image data by increasing the grayscale of the image data corresponding to the positive position brightness compensation value and may generate compensated image data by decreasing the grayscale of the image data corresponding to the negative position brightness compensation value.

[0050] As a result, the brightness deviation of the display device 110 is minimized and the display quality of the image is improved by the camera compensation method.

[0051] The structure of a display panel of a display device will be described below.

[0052] Figure 2 is a cross-sectional view showing a display panel of a display device according to a first embodiment of the present invention; Figure 3 is a plan view showing a display panel of a display device according to a first embodiment of the present invention.

[0053] exist Figure 2 In the display panel 120 of the display device 110 according to the first embodiment of the present invention, the display panel 120 includes a plurality of pixels P, each of which includes a red sub-pixel SPr, a first green sub-pixel SPg1, a second green sub-pixel SPg2, and a blue sub-pixel SPb.

[0054] The gate 124 is located in each of the red sub-pixel SPr, the first green sub-pixel SPg1 , the second green sub-pixel SPg2 , and the blue sub-pixel SPb on the substrate 122 , and a gate insulating layer 126 is disposed on the entire gate 124 and the substrate 122 .

[0055] The semiconductor layer 128 is disposed on the gate insulating layer 126 located above the gate 124 , and the source electrode 130 and the drain electrode 132 are disposed on both ends of the semiconductor layer 128 .

[0056] The gate electrode 124 , the semiconductor layer 128 , the source electrode 130 , and the drain electrode 132 constitute a driving thin film transistor (TFT) Td.

[0057] Although not shown, a plurality of TFTs having the same structure as the driving TFT Td may be provided in each of the red subpixel SPr, the first green subpixel SPg1, the second green subpixel SPg2, and the blue subpixel SPb.

[0058] A passivation layer 134 is disposed on the entire driving TFT Td and the gate insulating layer 126 , and a first electrode 136 is located in each of the red subpixel SPr, the first green subpixel SPg1 , the second green subpixel SPg2 , and the blue subpixel SPb on the passivation layer 134 .

[0059] The passivation layer 134 has a contact hole exposing the drain electrode 132 of the driving TFT Td, and the first electrode 136 is connected to the drain electrode 132 of the driving TFT Td through the contact hole of the passivation layer 134 .

[0060] The bank layer 138 is disposed on the first electrode 136. The bank layer 138 covers the edge portion of the first electrode 136 and has an opening exposing the central portion of the first electrode 136. The light emitting layer 140 is disposed on the first electrode 136 exposed through the opening of the bank layer 138.

[0061] The light emitting layer 140 may be formed of an organic material and may include a hole injection layer, a hole transport layer, a light emitting material layer, an electron transport layer, and an electron injection layer.

[0062] The second electrode 142 is disposed entirely on the light emitting layer 140 and the bank layer 138 .

[0063] The first electrode 136 , the light emitting layer 140 , and the second electrode 142 constitute a light emitting diode De.

[0064] In the light emitting diode De of the display panel 120 , the first electrode 136 and the second electrode 142 respectively provide holes and electrons to the light emitting layer 140 , and the light emitting layer 140 emits light using the holes and the electrons.

[0065] Since the light-emitting layer 140 is set in the opening of the bank layer 138, the light-emitting layer 140 of the red sub-pixel SPr, the first green sub-pixel SPg1, the second green sub-pixel SPg2 and the blue sub-pixel SPb corresponding to the opening of the bank layer 140 can be defined as a red light-emitting area EAr, a first green light-emitting area EAg1, a second green light-emitting area EAg2 and a blue light-emitting area EAb.

[0066] exist Figure 3 In the display panel 120 of the display device 110 according to the first embodiment of the present invention, the display panel 120 includes a plurality of pixels P, each of which includes a red sub-pixel SPr, a first green sub-pixel SPg1, a second green sub-pixel SPg2, and a blue sub-pixel SPb.

[0067] For example, the pixel P may have a diamond shape, and each of the red subpixel SPr, the first green subpixel SPg1, the second green subpixel SPg2, and the blue subpixel SPb may have a diamond shape obtained by dividing each pixel P into four equal parts.

[0068] The red subpixel SPr may be disposed at the right vertex portion of the rhombus shape of the pixel P, and the first green subpixel SPg1 may be disposed at the upper vertex portion of the rhombus shape of the pixel P. The second green subpixel SPg2 may be disposed at the lower vertex portion of the rhombus shape of the pixel P, and the blue subpixel SPg1 may be disposed at the left vertex portion of the rhombus shape of the pixel P.

[0069] The red sub-pixel SPr, the first green sub-pixel SPg1, the second green sub-pixel SPg2, and the blue sub-pixel SPb include a red light emitting region EAr, a first green light emitting region EAg1, a second green light emitting region EAg2, and a blue light emitting region EAb, respectively.

[0070] Each of the red light emitting area EAr and the blue light emitting area EAb has a diamond shape or a square shape inclined in a diagonal direction D. As shown in FIG.

[0071] Each of the first and second green light emitting regions EAg1 and EAg2 has a cross shape or a shape of two bars arranged in the horizontal direction H and the vertical direction V and crossing each other.

[0072] For example, the red light emitting region EAr may have an area smaller than that of the blue light emitting region EAb, and the first and second green light emitting regions EAg1 and EAg2 may have areas equal to each other.

[0073] In the display panel 120, the second frequency component of the original frequency is reduced as the widths of the first green light emitting area EAg1 and the second green light emitting area EAg2 increase in the horizontal direction H and the vertical direction V. As a result, the high frequency component of the moire frequency is reduced, so that the moire is eliminated and the tiny stains are compensated.

[0074] In another embodiment, the high-frequency component of the moire frequency may be further reduced by increasing the randomness of the first green sub-pixel and the second green sub-pixel.

[0075] Figure 4 2 is a plan view showing a display panel of a display device according to a second embodiment of the present invention. Description of the same parts as those of the first embodiment will be omitted.

[0076] exist Figure 4 In the display panel 220 of the display device according to the second embodiment of the present invention, the display panel 220 includes a plurality of pixels P, each of which includes a red sub-pixel SPr, a first green sub-pixel SPg1, a second green sub-pixel SPg2, and a blue sub-pixel SPb.

[0077] For example, the pixel P may have a diamond shape, and each of the red subpixel SPr, the first green subpixel SPg1, the second green subpixel SPg2, and the blue subpixel SPb may have a diamond shape obtained by dividing each pixel P into four equal parts.

[0078] The red subpixel SPr may be disposed at the right vertex portion of the rhombus shape of the pixel P, and the first green subpixel SPg1 may be disposed at the upper vertex portion of the rhombus shape of the pixel P. The second green subpixel SPg2 may be disposed at the lower vertex portion of the rhombus shape of the pixel P, and the blue subpixel SPg1 may be disposed at the left vertex portion of the rhombus shape of the pixel P.

[0079] The red sub-pixel SPr, the first green sub-pixel SPg1, the second green sub-pixel SPg2, and the blue sub-pixel SPb include a red light emitting region EAr, a first green light emitting region EAg1, a second green light emitting region EAg2, and a blue light emitting region EAb, respectively.

[0080] Each of the red light emitting area EAr and the blue light emitting area EAb has a diamond shape or a square shape inclined in a diagonal direction D. As shown in FIG.

[0081] The first green light emitting area EAg1 has a cross shape or a shape of two strips arranged along the horizontal direction H and the vertical direction V and crossing each other, and the second green light emitting area EAg2 has a cross shape inclined along the oblique direction D or a shape of two strips arranged along the oblique direction D and crossing each other.

[0082] For example, the red light emitting region EAr may have an area smaller than that of the blue light emitting region EAb, and the first and second green light emitting regions EAg1 and EAg2 may have areas equal to each other.

[0083] In the display panel 220, the second frequency component of the original frequency decreases as the width of the first green light emitting area EAg1 increases in the horizontal direction H and the vertical direction V. As a result, the high frequency component of the moire frequency decreases, so that the moire is eliminated and the micro stain is compensated.

[0084] In addition, since the randomness of the first green light emitting area EAg1 and the second green light emitting area EAg2 increases due to their positioning in different directions, the high-frequency component of the moire frequency is further reduced, so that the moire is eliminated and the tiny stains are compensated.

[0085] In the present invention, the original frequency and the moire frequency are calculated according to the spatial frequencies of a plurality of sub-pixels of the display panel and the spatial frequencies of a plurality of sensors of the camera, and the moire is eliminated by using the original frequency and the moire frequency.

[0086] Among the red sub-pixel, the green sub-pixel and the blue sub-pixel, the green sub-pixel has a relatively high brightness and thus becomes the biggest cause of the moire. Therefore, the green sub-pixel will be described below as a reference.

[0087] Figure 5A , 5B 5C are views showing a light emitting region structure, a luminance profile, and a frequency domain of a sub-pixel according to a first comparative example, respectively.

[0088] exist Figure 5A The first green light emitting area EAg1 of the first green subpixel SPg1 of the first comparative example has a strip shape arranged along the oblique direction D of +45 degrees, and the second green light emitting area EAg2 of the second green subpixel SPg2 of the first comparative example has a strip shape arranged along the oblique direction D of -45 degrees.

[0089] exist Figure 5B In the figure, the brightness of light emitted from the first green light emitting area EAg1 and the second green light emitting area EAg2 has peak values ​​repeated with panel periods Xp(H), Xp(V) and Xp along the horizontal, vertical and diagonal directions H, V and D in the spatial domain of the light emitting area structure.

[0090] The panel periods Xp(H), Xp(V) and Xp representing repeatability in the spatial domain can be expressed as a panel frequency (spatial frequency) Fp in the frequency domain through Fourier transform. The panel frequency Fp is the reciprocal of the panel periods Xp(H), Xp(V) and Xp, and refers to the number of repetitions of the brightness peak per unit distance at the spatial frequency Fp.

[0091] Although not shown, the camera 170 may include a plurality of sensors arranged in a matrix form. The plurality of sensors may be repeated in horizontal, vertical and diagonal directions H, V and D with a sensor period Ts, which may be represented as a sensor frequency Fs through Fourier transform.

[0092] exist Figure 5C , the second original frequencies Fo2(H) and Fo2(V) in the horizontal and vertical directions H and V and the third original frequency Fo3 in the oblique direction D may be calculated based on the panel frequency Fp of the display panel 110 and the sensor frequency Fs of the camera 170 .

[0093] In the first comparative example, the second original frequencies Fo2(H) and Fo2(V) in the horizontal and vertical directions H and V are respectively set on the X frequency axis Fx and the Y frequency axis Fy, and the third original frequency Fo3 in the oblique direction D is set on a straight line in the oblique direction.

[0094] Fig. 6A , 6B 6C are views showing a light emitting region structure, a brightness profile, and a frequency domain of a sub-pixel according to a second comparative example, respectively.

[0095] exist Fig. 6A , the green light emitting area EAg of the green sub-pixel SPg of the second comparative example has a square shape arranged along the horizontal direction H and the vertical direction V.

[0096] exist Figure 6B In the figure, the brightness of the light emitted from the green light emitting area EAg has peak values ​​that repeat with the panel periods Xp(H) and Xp(V) in the horizontal and vertical directions H and V in the airspace of the light emitting area structure. Since the brightness of the light emitted from the green light emitting area EAg has a relatively narrow peak value along the oblique direction D, the peak value along the oblique direction D has relatively weak repeatability, and the panel period along the oblique direction D is not defined.

[0097] exist Figure 6C , the second original frequencies Fo2 (H) and Fo2 (V) in the horizontal and vertical directions H and V may be calculated based on the panel frequency Fp of the display panel 110 and the sensor frequency Fs of the camera 170 .

[0098] Since the panel period along the oblique direction D is not defined, the third original frequency Fo3 along the oblique direction D is not calculated.

[0099] In the second comparative example, second original frequencies Fo2 (H) and Fo2 (V) in the horizontal and vertical directions H and V are set on the X frequency axis Fx and the Y frequency axis Fy, respectively.

[0100] Fig. 7A , 7B 7A and 7B are views showing a light emitting region structure, a brightness profile, and a frequency domain of a sub-pixel according to the first embodiment of the present invention, respectively.

[0101] exist Fig. 7A In the embodiment, each of the first green light emitting area EAg1 of the first green sub-pixel SPg1 (or the first subset of green sub-pixels) and the second green light emitting area EAg2 of the second green sub-pixel SPg2 (or the second subset of green sub-pixels) has a cross shape oriented along a first direction and a second direction different from the first direction, or a shape of two crossed bars arranged along horizontal and vertical directions H and V, wherein the first direction can be aligned with the horizontal direction and the vertical direction, and the second direction can be aligned with the diagonal directions of 45 degrees and -45 degrees.

[0102] exist Figure 7B In the embodiment, the brightness of the light emitted from the first green light emitting area EAg1 and the second green light emitting area EAg2 has a peak value that repeats with the panel period Xp(H) and Xp(V) along the horizontal and vertical directions H and V in the airspace of the light emitting area structure. Since the brightness of the light emitted from the first green light emitting area EAg1 and the second green light emitting area EAg2 has a relatively narrow peak value along the oblique direction D, the peak value along the oblique direction D has relatively weak repeatability, and the panel period along the oblique direction D is not defined.

[0103] exist Figure 7C , the second original frequencies Fo2 (H) and Fo2 (V) in the horizontal and vertical directions H and V may be calculated based on the panel frequency Fp of the display panel 110 and the sensor frequency Fs of the camera 170 .

[0104] Since the panel period along the oblique direction D is not defined, the third original frequency Fo3 along the oblique direction D is not calculated.

[0105] In the first embodiment of the present invention, the second original frequencies Fo2(H) and Fo2(V) in the horizontal and vertical directions H and V are respectively set on the X frequency axis Fx and the Y frequency axis Fy.

[0106] Fig. 8A , 8B8C are views showing a light emitting region structure, a brightness profile, and a frequency domain of a sub-pixel according to a second embodiment of the present invention, respectively.

[0107] exist Fig. 8A In the figure, the first green light emitting area EAg1 of the first green sub-pixel SPg1 according to the second embodiment of the present invention has a cross shape or a shape of two crossed bars arranged along the horizontal and vertical directions H and V, and the second green light emitting area EAg2 of the second green sub-pixel SPg2 according to the second embodiment of the present invention has an inclined cross shape or a shape of two inclined crossed bars arranged along the horizontal and vertical directions H and V.

[0108] exist Figure 8B In the embodiment, the brightness of the light emitted from the first green light emitting area EAg1 and the second green light emitting area EAg2 has a first peak value repeated with the panel periods Xp(H) and Xp(V) and a second peak value each having a relatively narrow width in the horizontal and vertical directions H and V in the airspace of the light emitting area structure. The brightness of the light emitted from the first green light emitting area EAg1 and the second green light emitting area EAg2 has a relatively narrow peak value along the oblique direction D.

[0109] As a result, the second peaks along the horizontal and vertical directions H and V and the peak along the oblique direction D have relatively weak repeatability, and the panel period corresponding to the second peaks along the horizontal and vertical directions H and V and the peak along the oblique direction D is not defined.

[0110] exist Figure 8C , the second original frequencies Fo2 (H) and Fo2 (V) in the horizontal and vertical directions H and V may be calculated based on the panel frequency Fp of the display panel 110 and the sensor frequency Fs of the camera 170 .

[0111] Since the panel period along the oblique direction D is not defined, the third original frequency Fo3 along the oblique direction D is not calculated.

[0112] In the second embodiment of the present invention, the second original frequencies Fo2(H) and Fo2(V) in the horizontal and vertical directions H and V are respectively set on the X frequency axis Fx and the Y frequency axis Fy.

[0113] A method of calculating the original frequency and the moiré frequency will be described with reference to the accompanying drawings.

[0114] Fig. 9A is a view showing sub-pixels, light emitting region structures and frequency domain coordinates regarding a first comparative example; Fig. 9B is a diagram showing a sub-pixel, an original frequency, and a moire frequency of a light emitting area with respect to a first comparative example; Fig. 9C yes Fig. 9B Magnified image of .

[0115] exist Fig. 9A In the figure, the first green light-emitting area EAg1 of the first green sub-pixel SPg1 of the first comparison example has a strip shape arranged along the oblique direction D of +45 degrees, and the second light-emitting area EAg2 of the second green sub-pixel SPg2 of the first comparison example has a strip shape arranged along the oblique direction D of -45 degrees in the airspace of the light-emitting area structure.

[0116] The first green light emitting area EAg1 and the second green light emitting area EAg2 have a horizontal vertical panel period Xp in the horizontal and vertical directions H and V and have a horizontal vertical panel period Xp in the oblique direction D in the space domain of the light emitting area structure. times the slope period (i.e. Xp).

[0117] The original shapes of the first green light emitting area EAg1 and the second green light emitting area EAg2 are set at the origin (0, 0) of the frequency domain and correspond to the first original frequency Fo1 defined by the following equation (1):

[0118] Fo1=0 Equation (1)

[0119] The panel period Xp of the first and second green light emitting areas EAg1 and EAg2 in the horizontal and vertical directions H and V is set at (Fp, 0) and (0, Fp) in the frequency domain and corresponds to the second original frequency Fo2 defined by the following equation (2).

[0120] Fo2 = Fp / Fs = 1 / Ratio Equation (2)

[0121] Among them, Fp is the panel frequency calculated by Fourier transform of the horizontal and vertical panel period (i.e., panel period) Xp of the first green light-emitting area EAg1 and the second green light-emitting area EAg2 of the display panel, Fs is the sensor frequency calculated by Fourier transform of the sensor period of multiple sensors of the camera, and Ratio is the number of multiple sensors of the camera corresponding to one sub-pixel of the display panel.

[0122] The oblique line period along the oblique line direction D of the first green light emitting area EAg1 and the second green light emitting area EAg2 is Xp is set at (Fp / 2, 0) and (0, Fp / 2) in the frequency domain, and corresponds to the third original frequency Fo3 defined by the following equation (3).

[0123] Fo3 = (Fp / Fs)*(1 / 2) = 1 / (2Ratio) Equation (3)

[0124] Since the photographic image of the analysis object is obtained based on multiple sensors of the camera, the sensor frequency Fs can be set to 1, and the second original frequency Fo2 can be the same as the panel frequency Fp (Fo2=Fp).

[0125] exist Fig. 9B and 9C In the embodiment of the present invention, when a sampling process (sensing process) is performed on the first to third original frequencies Fo1 to Fo3 according to the sampling theorem, a shape that replicates and shifts the first to third original frequencies Fo1 to Fo3 is generated. The shape generated by the sampling process is defined as the first to third moire frequencies Fm1 to Fm3 represented by the following equations (4) to (6).

[0126] Fm1 = Fo1±(Fs-2Fo2) = Fo1±(1-(2 / Ratio)) Equation (4)

[0127] Fm2 = Fo2±(Fs-2Fo2) = Fo2±(1-(2 / Ratio)) Equation (5)

[0128] Fm3 = Fo2±(Fs-2Fo2) = Fo3±(1-(2 / Ratio)) Equation (6)

[0129] As a result, in the frequency domain, the first original frequency Fo1 is set at the origin (0,0); the second original frequency Fo2 is set at (+Fp / Fs,0), ​​(0,+Fp / Fs), (0,-Fp / Fs), (0,-Fp / Fs) separated from the first original frequency Fo1 by Fp / Fs along the X and Y frequency axes; and the third original frequency Fo3 is set at (+Fp / 2Fs,+Fp / 2Fs), (-Fp / 2Fs,+Fp / 2Fs), (-Fp / 2Fs,-Fp / 2Fs), (+Fp / 2Fs,-Fp / 2Fs) separated from the first original frequency Fo1 by Fp / 2Fs along the oblique direction D.

[0130] In the frequency domain, a first moire frequency Fm1 is set at eight points separated from the first original frequency Fo1 by Fs-2Fo2 along the X and Y frequency axes and the oblique direction D, a second moire frequency Fm2 is set at eight points separated from the second original frequency Fo2 by Fs-2Fo2 along the X and Y frequency axes and the oblique direction D, and a third moire frequency Fm3 is set at eight points separated from the third original frequency Fo3 by Fs-2Fo2 along the X and Y frequency axes and the oblique direction D.

[0131] In the frequency domain, the first to third moire frequencies Fm1 to Fm3 adjacent to the first to third original frequencies Fo1 to Fo3 may cause interference fringe such as moire.

[0132] The occurrence of moire due to the first to third moire frequencies Fm1 to Fm3 will be described below.

[0133] Fig.10 FIG. 1 is a diagram showing the processing of the second moire frequency of the compensation method of the display device according to the first embodiment of the present invention. Figures 9A to 9C The processing of the second moiré frequency is described.

[0134] exist Fig.10 In the embodiment, the input photographic image has a size of 6576×4384 in the spatial domain corresponding to the resolution of multiple sensors of the camera 170, and the photographic image includes a display image of the display panel 120.

[0135] Since the photographic image outside the display image is not necessary, the display image having a size of 2532X1170 corresponding to the resolution of the first green light emitting area EAg1 and the second green light emitting area EAg2 of the display panel 120 is retained, and the other parts of the photographic image are eliminated through crop processing.

[0136] The clipping process in the spatial domain corresponds to the low-pass filtering (LPF) process in the frequency domain.

[0137] In the frequency domain, the input photographic image has a first original frequency Fo1 at the origin, a second original frequency Fo2 at four points separated from the first original frequency Fo1 by Fp / Fs along the X and Y frequency axes, and a third original frequency Fo3 at four points separated from the first original frequency Fo1 by Fp / 2Fs along the diagonal direction D.

[0138] In the frequency domain, the input photographic image has a first moire frequency Fm1 at eight points separated from the first original frequency Fo1 by Fs-2Fo2 along the X and Y frequency axes, a second moire frequency Fm2 at eight points separated from the first original frequency Fo1 by Fs-2Fo2 along the X and Y frequency axes, and a third moire frequency Fm3 at eight points separated from the first original frequency Fo1 by Fs-2Fo2 along the X and Y frequency axes.

[0139] Through the clipping process, the moire frequencies of the square including the third original frequency Fo3 corresponding to the low frequency range are retained, and other moire frequencies outside the square including the third original frequency Fo3 are eliminated.

[0140] For example, in the frequency domain, the first moire frequency Fm1 and a portion of the third moire frequency Fm3 may be retained, and the second moire frequency Fm2 may be eliminated.

[0141] Fig.11FIG. 1 is a diagram showing the processing of the third moire frequency of the compensation method of the display device according to the first embodiment of the present invention. Figures 9A to 9C The processing of the third moiré frequency is described.

[0142] exist Fig.11 , the third moire frequency Fm3 is set around the third original frequency Fo3 based on the width in the oblique direction D of the green light emitting area of ​​the green sub-pixel along the display panel 120. As a result, when the third original frequency Fo3 is eliminated by reducing the width in the oblique direction D of the light emitting area of ​​the sub-pixel, the third moire frequency Fm3 can also be eliminated.

[0143] For example, the green light emitting region of the green sub-pixel in the inclined stripe shape may have a relatively large width along the oblique direction D, and the third original frequency Fo3 may be set closest to the first original frequency Fo1.

[0144] The green light emitting area of ​​the green sub-pixel of a medium shape obtained by reducing the width along the oblique direction D of the green light emitting area of ​​the green sub-pixel (increasing the width along the horizontal and vertical directions of the green light emitting area of ​​the green sub-pixel) has a reduced width along the oblique direction D. As a result, although the third original frequency Fo3 closest to the first original frequency Fo1 is eliminated, the third original frequency Fo3 next close to the first original frequency Fo1 remains and becomes a potential factor of the third moire frequency Fm3.

[0145] The green light emitting area of ​​the green sub-pixel in a square shape obtained by further reducing the width along the oblique direction D of the green light emitting area of ​​the green sub-pixel (further increasing the width along the horizontal and vertical directions of the green light emitting area of ​​the green sub-pixel) has a further reduced width along the oblique direction D. As a result, the third original frequency Fo3 is completely eliminated, and thus the third moire frequency Fm3 is completely eliminated.

[0146] Fig.12 FIG. 1 is a diagram showing a process of a first moire frequency of a compensation method for a display device according to a first embodiment of the present invention. Figures 9A to 9C The processing of the first moiré frequency is described.

[0147] exist Fig.12 , the first moire frequency Fm1 depends on the first original frequency Fo1, the second original frequency Fo2 and the sensor frequency Fs according to equation (4). The first original frequency Fo1 is a component generated without considering the shape of the green light emitting area of ​​the green sub-pixel of the display panel 120, and complete elimination of the first original frequency Fo1 is impossible.

[0148] The second original frequency Fo2 is twice (i.e., 2*Fo2) is a high frequency component. By increasing the width of the green light emitting area of ​​the green sub-pixel along the display panel 120 in the horizontal and vertical directions H and V, the second original frequency Fo2 is twice (i.e., 2*Fo2) is reduced and the first moire frequency Fm1 is reduced.

[0149] For example, in a green light emitting area of ​​a green sub-pixel having a square shape with relatively small widths along the horizontal and vertical directions H and V, the first original frequency Fo1 may be set at the origin, and the second original frequency Fo2 and twice the second original frequency Fo2 (i.e., 2*Fo2) may be set at the X and Y frequency axes. Twice the second original frequency Fo2 (i.e., 2*Fo2) may have a relatively strong intensity.

[0150] In a green light emitting area of ​​a green sub-pixel having a relatively large width along the horizontal and vertical directions H and V by increasing the width along the horizontal and vertical directions H and V, the first original frequency Fo1 may be set at the origin, and the second original frequency Fo2 and twice the second original frequency Fo2 (i.e., 2*Fo2) may be set at the frequency axes X and Y. Twice the second original frequency Fo2 (i.e., 2*Fo2) may have a relatively weak intensity.

[0151] In the green light emitting area of ​​the green sub-pixel having a relatively large width along the horizontal and vertical directions H and V by smoothing the edges of the square shape, the first original frequency Fo1 may be set at the origin, the second original frequency Fo2 and twice the second original frequency Fo2 (i.e., 2*Fo2) may be set at the X and Y frequency axes. Twice the second original frequency Fo2 (i.e., 2*Fo2) may have the minimum intensity, and the first moire frequency Fm1 may be minimized.

[0152] When the width of the green light emitting area of ​​the green sub-pixel in the horizontal and vertical directions H and V increases, the light emitting area ratio of the red, green, and blue sub-pixels may change and the color of the display image of the display device 110 may change unintentionally. As a result, the green light emitting area of ​​the green sub-pixel is limited to be formed in a square shape with a relatively large width.

[0153] However, when the green light-emitting area of ​​the green sub-pixel is formed to have a cross shape (wherein the width along the horizontal direction H is partially increased and the width along the vertical direction V is partially increased), twice the second original frequency Fo2 (i.e., 2*Fo2) and the first moiré frequency Fm1 can be reduced while the aperture ratio and the light-emitting area ratio of the green sub-pixel remain unchanged.

[0154] Fig.13 FIG. 1 is a diagram showing a process of a first moire frequency of a compensation method for a display device according to a first embodiment of the present invention. Figures 9A to 9CThe processing of the first moiré frequency is described.

[0155] exist Fig.13 In the green light-emitting area of ​​the green sub-pixel having an inclined strip shape of ±45 degrees relative to the horizontal and vertical directions H and V, even if the randomness of the inclination angle of the strip shape increases, the first original frequency Fo1, the second original frequency Fo2 and twice the second original frequency Fo2 (i.e., 2*Fo2) will not be eliminated.

[0156] However, when the green light emitting area of ​​the green sub-pixel is formed to have a cross shape by partially increasing the width along the horizontal direction H and partially increasing the width along the vertical direction V and has a partially inclined cross shape by assigning a degree of randomness to the cross shape, twice the second original frequency Fo2 (i.e., 2*Fo2) and the first moiré frequency Fm1 can be further reduced while the aperture ratio and the light emitting area ratio of the green sub-pixel remain unchanged.

[0157] Fig.14 FIG. 1 is a diagram showing the processing of the first moire frequency of the compensation method of the display device according to the first and second embodiments of the present invention. Figures 9A to 9C The processing of the first moiré frequency is described.

[0158] exist Fig.14 In the embodiment of the present invention, when the shape of the first green light emitting area EAg1 of the first green sub-pixel SPg1 and the second green light emitting area EAg2 of the second green sub-pixel SPg2 is changed from a square shape to a cross shape in which the widths along the horizontal and vertical directions H and V are partially increased, twice the second original frequency Fo2 (i.e., 2*Fo2) and the first moiré frequency Fm1 can be reduced while the aperture ratio and the light emitting area ratio of the first green light emitting area EAg1 of the first green sub-pixel SPg1 and the second green light emitting area EAg2 of the second green sub-pixel SPg2 remain unchanged.

[0159] When the shapes of the first green light emitting area EAg1 of the first green sub-pixel SPg1 and the second green light emitting area EAg2 of the second green sub-pixel SPg2 according to the second embodiment of the present invention are changed from a cross shape to an inclined cross shape with a degree of randomness assigned to the cross shape, twice the second original frequency Fo2 (i.e., 2*Fo2) and the first moiré frequency Fm1 can be further reduced under the condition that the aperture ratio and the light emitting area ratio of the first green light emitting area EAg1 of the first green sub-pixel SPg1 and the second green light emitting area EAg2 of the second green sub-pixel SPg2 remain unchanged.

[0160] Interference fringes such as moire are eliminated by performing a sampling process on the first and second green light emitting regions EAg1 and EAg2 having a cross shape.

[0161] Fig.15A and 15B They are views showing states before and after moire elimination through sampling processing of the display devices according to the first and second embodiments of the present invention, respectively.

[0162] exist Fig.15A and 15B In the embodiment, the display device 110 according to the first embodiment of the present invention includes a first green light emitting area EAg1 and a second green light emitting area EAg2 having a cross shape, and the display device according to the second embodiment of the present invention includes a first green light emitting area EAg1 and a second green light emitting area EAg2 having an inclined cross shape.

[0163] exist Fig.15A , before the sampling process is performed, moire appears in region A and minute stains appear in region B of the display device according to the first and second embodiments of the present invention.

[0164] Since moire and minute stains are not clearly distinguished in the frequency domain, it is difficult to detect minute stains. As a result, minute stains may not be correctly compensated.

[0165] exist Fig. 15B In the example, after the sampling process is performed, the moiré appearing in the region A is eliminated, and the minute stains appearing in the region B are retained.

[0166] Since the clarity of the displayed image remains equal without distortion in the case where the micro stain is eliminated by the sampling process, the moire and the micro stain are clearly distinguished in the frequency domain. As a result, the micro stain can be easily detected and can be correctly compensated.

[0167] Therefore, in the display device and the method for compensating the display device according to the first and second embodiments of the present invention, the first green light emitting area EAg1 of the first green sub-pixel SPg1 and the second green light emitting area EAg2 of the second green sub-pixel SPg2 have a cross shape or a mixed shape of the cross shape and the inclined cross shape. As a result, twice the second original frequency Fo2 (i.e., 2*Fo2) and the first moire frequency Fm1 are reduced under the condition that the aperture ratio and the light emitting area ratio of the first green light emitting area EAg1 of the first green sub-pixel SPg1 and the second green light emitting area EAg2 of the second green sub-pixel SPg2 remain unchanged. As a result, the moire is eliminated and the minute stain is compensated.

[0168] It will be clear to those skilled in the art that various modifications and changes can be made in the present invention without departing from the spirit or scope of the present invention. Therefore, the present invention is intended to cover all modifications and changes to the present invention within the scope of the appended claims and their equivalents.

Claims

1. A display device, comprising: a substrate having a red sub-pixel, a first green sub-pixel, a second green sub-pixel, and a blue sub-pixel; a driving thin film transistor on the substrate, the driving thin film transistor being located in each of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel; as well as a light emitting diode connected to the driving thin film transistor and located in each of the red sub-pixel, the first green sub-pixel, the second green sub-pixel, and the blue sub-pixel, The light-emitting diodes of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel include a red light-emitting region, a first green light-emitting region, a second green light-emitting region and a blue light-emitting region, respectively. wherein the first green light emitting region has a cross shape, wherein the second green light emitting region has one of a cross shape and an inclined cross shape, The red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel form a rhombus-shaped pixel. The red sub-pixel is arranged at the right vertex part of the pixel, the first green sub-pixel is arranged at the upper vertex part of the pixel, the second green sub-pixel is arranged at the lower vertex part of the pixel, and the blue sub-pixel is arranged at the left vertex part of the pixel. 2 . The display device according to claim 1 , wherein each of the red light emitting area and the blue light emitting area has a square shape.

3. The display device according to claim 1, Each of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel has a diamond shape.

4. The display device according to claim 1, wherein the light emitting diode comprises: connected to the first electrode of the driving thin film transistor; a light emitting layer located on the first electrode exposed through the opening of the bank layer; as well as a second electrode on the light-emitting layer, The red light-emitting area, the first green light-emitting area, the second green light-emitting area and the blue light-emitting area are respectively defined as the light-emitting layer of the red sub-pixel, the light-emitting layer of the first green sub-pixel, the light-emitting layer of the second green sub-pixel and the light-emitting layer of the blue sub-pixel corresponding to the opening of the embankment layer.

5. A method for compensating a display device, the method comprising: Displaying a display image using a display device having a red sub-pixel, a first green sub-pixel, a second green sub-pixel, and a blue sub-pixel; generating a photographic image by capturing the displayed image using a camera including a plurality of sensors; removing moire from the photographic image using a panel frequency calculated based on a panel period of the first green sub-pixel and the second green sub-pixel and a sensor frequency calculated based on a sensor period of the plurality of sensors; calculating a brightness compensation value by comparing the measured brightness of the photographic image with a target brightness; as well as generating compensated image data by applying the brightness compensation value to the image data, The light-emitting diodes of the red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel include a red light-emitting region, a first green light-emitting region, a second green light-emitting region and a blue light-emitting region, respectively. wherein the first green light emitting area and the second green light emitting area have a cross shape or a mixed shape of a cross shape and an inclined cross shape, The red sub-pixel, the first green sub-pixel, the second green sub-pixel and the blue sub-pixel form a rhombus-shaped pixel. The red sub-pixel is arranged at the right vertex part of the pixel, the first green sub-pixel is arranged at the upper vertex part of the pixel, the second green sub-pixel is arranged at the lower vertex part of the pixel, and the blue sub-pixel is arranged at the left vertex part of the pixel.

6. The method according to claim 5, wherein eliminating moire comprises: The first original frequency Fo1, the second original frequency Fo2 and the third original frequency Fo3 are calculated based on the panel period and the sensor period according to the following equations (1), (2) and (3), Fo1=0 Equation (1), Fo2=Fp / Fs Equation (2), Fo3=(Fp / Fs)*(1 / 2) Equation (3), Fp is the panel frequency calculated by Fourier transform of the panel period, and Fs is the sensor frequency calculated by Fourier transform of the sensor period.

7. The method according to claim 6, wherein eliminating the moire further comprises: The first moire frequency Fm1, the second moire frequency Fm2 and the third moire frequency Fm3 are calculated based on the first original frequency Fo1, the second original frequency Fo2 and the third original frequency Fo3 according to the following equations (4), (5) and (6): Fm1=Fo1±(Fs-2Fo2) Equation (4), Fm2=Fo2±(Fs-2Fo2) Equation (5), Fm3=Fo2±(Fs-2Fo2) Equation (6).

8. A display device, comprising: a first sub-pixel, a second sub-pixel, and a third sub-pixel that emit light of a first color, light of a second color, and light of a third color, respectively; as well as a corresponding light emitting diode which is respectively arranged in each of the first sub-pixel, the second sub-pixel and the third sub-pixel and has a first color light emitting area, a second color light emitting area and a third color light emitting area, The first color light emitting area and the second color light emitting area have a square shape, and the third color light emitting area has a cross shape. The first color is blue, the second color is red, and the third color is green. wherein the third subpixel has a first subset, or the third subpixel has a first subset and a second subset, wherein the first subset has a third color light emitting area in a cross shape oriented along a first direction, and the second subset has a third color light emitting area in a cross shape oriented along a second direction different from the first direction, The first sub-pixel, the second sub-pixel and the third sub-pixel form a rhombus-shaped pixel, The first sub-pixel is arranged at the left vertex part of the pixel, the second sub-pixel is arranged at the right vertex part of the pixel, and the third sub-pixel is arranged at the upper vertex part and the lower vertex part of the pixel. 9 . The display device according to claim 8 , wherein the first direction is aligned with a horizontal direction and a vertical direction, and the second direction is aligned with oblique directions of 45 degrees and −45 degrees.

10. The display device according to claim 8, Each of the first sub-pixel, the second sub-pixel and the third sub-pixel has a diamond shape.

Images