Tiled display device

Abstract

A tiled display device is disclosed. A tiled display device according to the present specification includes: a plurality of pixels disposed on a display panel; a first pixel region including a first pixel and a second pixel adjacent to each other; and a second pixel region including a first pixel and a third pixel adjacent to each other. A sum of brightness for each color of any one of two pixels selected from a group including the first pixel, the second pixel, and the third pixel is larger than a sum of brightness for each color of each of two pixels between which a distance is relatively smaller than a distance between the two selected pixels. According to the tiled display device based on the present specification, it is possible to improve image quality and visibility and prevent deterioration of color reproducibility.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority and the benefit of Korean Patent Application No. 10 - 2023 - 0184672, filed on December 18, 2023, the disclosure of which is incorporated herein by reference in its entirety. Technical field

[0003] The present invention relates to a tiled display device. Background art

[0004] An organic light - emitting diode (OLED) display device reproduces an image by causing an OLED provided in each pixel to emit light according to an input image signal. Since the OLED display device has a fast response time, high luminous efficiency and brightness, a wide viewing angle, and can exhibit a black gradation with perfect black, the OLED display device has excellent contrast and an excellent color gamut. The OLED display device does not require a backlight unit.

[0005] In recent years, a display device using a light - emitting diode (LED), which is an inorganic light - emitting element, as a light - emitting element of a pixel has attracted attention as a next - generation display device. Since an LED is made of an inorganic material, the LED does not require a separate encapsulation layer to protect the organic material from moisture, and has higher reliability and a longer lifespan than an OLED. In addition, the LED has a fast lighting speed, excellent luminous efficiency, and impact resistance.

[0006] In the case of driving a display device, when the brightness of the display panel and / or the distribution of the peak wavelengths of each light - emitting element is uneven, the quality of the image reproduced on the display panel deteriorates. For example, when the distance between adjacent pixels increases or decreases with respect to the boundary existing between display panel units, a brightness deviation of the entire display panel may occur. Alternatively, when the peak wavelengths of adjacent pixels with respect to the boundary are uneven, color reproducibility may deteriorate. Summary of the invention

[0007] The present invention aims to provide a display device that prevents deterioration of brightness deviation and / or color reproducibility caused by coupling in units of display panels on the screen of a tiled display device and improves image quality.

[0008] The object of this specification is not limited to the above object, and those skilled in the art will be able to clearly understand other objects not mentioned from the following description.

[0009] The tiled display device according to the present specification includes: a plurality of pixels provided on a display panel; a first pixel region including a first pixel and a second pixel adjacent to each other; and a second pixel region including a first pixel and a third pixel adjacent to each other, wherein the luminance of the first color in the first pixel region is substantially the same as the luminance of the first color in the second pixel region, and the sum of the luminance for each color of any one of two pixels selected from the group including the first pixel, the second pixel, and the third pixel is greater than the sum of the luminance for each color of each of two pixels whose distance therebetween is relatively smaller than the distance between the two selected pixels.

[0010] The tiled display device according to the present specification includes: a plurality of pixels provided on a display panel; a first pixel region including a first pixel and a second pixel adjacent to each other; and a second pixel region including a first pixel and a third pixel adjacent to each other, wherein the luminance of the first color in the first pixel region is substantially the same as the luminance of the first color in the second pixel region, and the sum of the luminance for each color of any one of two pixels selected from the group including the first pixel, the second pixel, and the third pixel is smaller than the sum of the luminance for each color of each of two pixels whose distance therebetween is relatively greater than the distance between the two selected pixels.

[0011] The tiled display device according to the present specification includes: a first pixel including a 1-1 sub-pixel and a 1-2 sub-pixel that emit the same light in a wavelength band of a first color; and a second pixel provided to be spaced apart from the first pixel and including a 2-1 sub-pixel and a 2-2 sub-pixel that emit the same light in a wavelength band of the first color, wherein a first pattern and a second pattern alternately appear over time, in the first pattern, the 1-1 sub-pixel and the 2-2 sub-pixel are turned on, and the 1-2 sub-pixel and the 2-1 sub-pixel are turned off, and in the second pattern, the 1-1 sub-pixel and the 2-2 sub-pixel are turned off, and the 1-2 sub-pixel and the 2-1 sub-pixel are turned on.

[0012] The tiled display device according to the present specification includes: a first pixel including a 1-1 sub-pixel and a 1-2 sub-pixel that emit light in a wavelength band of the same color; and a second pixel provided to be spaced apart from the first pixel and including a 2-1 sub-pixel and a 2-2 sub-pixel that emit light in a wavelength band of the same color, wherein the luminance of the first color of the first pixel is substantially the same as the luminance of the first color of the second pixel, and the 1-1 sub-pixel, the 1-2 sub-pixel, and the 2-1 sub-pixel are turned on, and the 2-2 sub-pixel is turned off.

[0013] The tiled display device according to this specification includes: a first pixel including 1-1 sub-pixels and 1-2 sub-pixels that emit light in the same color band; and a second pixel that is disposed to be spaced apart from the first pixel and includes 2-1 sub-pixels and 2-2 sub-pixels that emit light in the same color band, wherein the brightness of the first color of the first pixel is substantially the same as the brightness of the first color of the second pixel, and the 1-1 sub-pixels, 1-2 sub-pixels, 2-1 sub-pixels, and 2-2 sub-pixels are turned on. Description of the Drawings

[0014] Figure 1 is a block diagram schematically showing a display device according to an embodiment.

[0015] Figure 2 is a perspective view showing a tiled display device according to an embodiment.

[0016] Figure 3 is a plan view showing a tiled display device according to an embodiment.

[0017] Figure 4 is a plan view showing a pixel according to an embodiment.

[0018] Figure 5 is a schematic curve graph showing the light emission intensity distribution graphs of a blue light emitting element, a green light emitting element, and a red light emitting element according to their bands.

[0019] Figure 6 and Figure 7 is a schematic curve graph showing the light emission intensity distribution graph of a red light emitting element according to its band.

[0020] Figure 8 is a schematic curve graph showing the light emission intensity distribution graphs of a main light emitting element, an auxiliary light emitting element, and a pixel including the main light emitting element and the auxiliary light emitting element.

[0021] Figure 9 is a partial enlarged view of a tiled display device according to an embodiment.

[0022] Figure 10 (a) and (b) of are curve graphs showing the brightness along the X direction in a tiled display device.

[0023] Figure 10 (c) and (d) of are curve graphs showing the brightness along the Y direction in a tiled display device.

[0024] Figure 11 (a) and (b) of are curve graphs showing the brightness change along the X direction in a tiled display device according to an embodiment.

[0025] Figure 11 Figures (c) and (d) are graphs showing the luminance change in the Y direction in the tiled display device according to an embodiment.

[0026] Figure 12A and Figure 12B are partial enlarged views for describing the dark point compensation of the tiled display device according to an embodiment.

[0027] Figure 13 are partial enlarged views for describing the bright point compensation of the tiled display device according to an embodiment.

[0028] Figure 14 is a flowchart for describing the dark point and bright point compensation algorithms of the tiled display device according to an embodiment.

[0029] Figure 15A and Figure 15B are partial enlarged views showing the light quantity ratio of sub-pixels included in adjacent pixel blocks.

[0030] Figure 16 is a graph for describing the case where flickering is invisible.

[0031] Figure 17A 、 Figure 17B 、 Figure 18A and Figure 18B are partial enlarged views showing the light quantity ratio of sub-pixels.

[0032] Figure 19 is a partial enlarged view showing the light quantity ratio of sub-pixels.

[0033] Figure 20 and Figure 21 are partial enlarged views showing the light quantity ratio of sub-pixels.

[0034] Figure 22 is a partial enlarged view showing the light quantity ratio of sub-pixels.

[0035] Figure 23 and Figure 24 are partial enlarged views showing the light quantity ratio of sub-pixels. Detailed Embodiments

[0036] With reference to the embodiments described in detail below in conjunction with the accompanying drawings, the advantages and features of this specification and the methods for achieving them will become apparent. The present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided only to make the disclosure of the present invention complete and to fully inform those skilled in the art to which the present invention pertains of the scope of the present invention, and the present invention is defined only by the scope of the appended claims.

[0037] In describing the present invention, when it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

[0038] When using the terms "comprising", "including", "having", and "consisting of" described in this specification, other parts can be added unless "only" is used. When a component is expressed in the singular, it can be interpreted as multiple components unless otherwise specifically stated.

[0039] When describing the positional relationship and interconnection relationship between two components (such as "above", "on top of", "below", "next to", "connected or coupled", "crossed or intersected", etc.), one or more other components can be inserted between the components unless the terms "immediately" or "directly" are described.

[0040] When using terms such as "after", "subsequently", "then", "before", etc. to describe the time relationship, it can include non - consecutive cases unless the terms "immediately" or "directly" are used.

[0041] Although terms such as "first", "second", etc. can be used to distinguish components, the function or structure of the components is not limited by the serial number or component name added in front of the components.

[0042] The following embodiments can be partially or fully coupled or combined, and various technical interconnections and drivings are possible. Each embodiment can be implemented independently of each other and can be implemented together in an associated relationship.

[0043] In addition, unless specifically defined and described clearly, the terms (including technical terms and scientific terms) used in the embodiments of this specification can be interpreted as the meanings commonly understood by those skilled in the art to which this specification pertains, and the meanings of commonly used terms can be interpreted by considering the context meaning of related technologies (such as terms defined in a dictionary).

[0044] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0045] Referring to Figure 1 , the display device includes a display panel PN in which a plurality of pixels are disposed on a display area AA and a display panel driving circuit for driving the pixels.

[0046] The display panel PN can be a panel with a rectangular structure, having a length in the X-axis direction, a width in the Y-axis direction, and a thickness in the Z-axis direction. However, the display panel is not limited thereto, and can be a panel with a square structure, where the length in the X-axis direction and the length in the Y-axis direction are the same. The pixel includes a plurality of sub-pixels SP with different colors. The display area AA where the input image is displayed on the display panel PN can be a screen visible on the front surface of the display panel PN.

[0047] The display panel driving circuit includes a data driving unit DD, a gate driving unit GD, and a timing controller TC for controlling the gate driving unit GD and the data driving unit DD.

[0048] The input image is displayed on the sub-pixels SP set in the display area AA of the display panel PN. Each of the sub-pixels SP includes a light-emitting element and a pixel circuit for driving the light-emitting element. The light-emitting element can be a light-emitting diode (LED) or a micro-LED.

[0049] A plurality of scan lines SL and a plurality of data lines DL are arranged to intersect each other on the display panel PN. Each of the sub-pixels SP is connected to the scan line SL and the data line DL. Figure 1 The omitted power lines can be connected to the sub-pixels SP.

[0050] In the display panel PN, a non-display area NA can be set outside the display area AA.

[0051] The gate driving unit GD provides a scan signal to the scan line SL in response to a gate control signal provided from the timing controller TC. The gate driving unit GD can be at least set on the non-display area NA of the display panel PN as shown in Figure 1 or set on the display area AA (not shown).

[0052] The data driving unit DD converts the image data received from the timing controller TC into a gamma compensation voltage in response to a data control signal provided from the timing controller TC, and outputs a data voltage. The data voltage output from the data driving unit DD is provided to the data line DL.

[0053] The timing controller TC arranges the image data input from the outside, and provides the arranged image data to the data driving unit DD. The timing controller TC can generate a gate control signal and a data control signal based on timing signals (such as a dot clock signal, a data enable signal, and a horizontal / vertical synchronization signal) synchronized with the input image signal. The timing controller TC provides the gate control signal to the gate driving unit GD, and provides the data control signal to the data driving unit DD to control the operation timing of the gate driving unit GD and the data driving unit DD.

[0054] The timing controller TC may include a compensation unit (not shown). The compensation unit may detect: a luminance deviation occurring between a boundary between a plurality of coupled display panels PN and the interior of the display panel PN, or a distribution and / or deviation of peak wavelengths at the boundary.

[0055] The target luminance deviation or peak wavelength distribution map embedded in the timing controller TC may be implemented as a look-up table (LUT) and stored in a memory connected to the timing controller TC. The compensation unit may compensate pixel data to be written into each of the sub-pixels or determine a driving method. Specifically, the compensation unit may determine how much pixel data should be compensated for each sub-pixel or how the pixel data should be driven based on the target luminance deviation and / or peak wavelength distribution map of the LUT and the detection data for each sub-pixel.

[0056] Connection lines and pad electrodes for sending signals to the sub-pixels SP of the display area AA may be provided in the non-display area NA. In addition, at least one of the following may be provided in the non-display area NA: a gate driver IC integrating a circuit of the gate driving unit GD and a data driver IC integrating a circuit of the data driving unit DD. The non-display area NA may include the rear surface of the display panel PN, that is, the rear surface without the sub-pixels SP. When an image is displayed on the display panel PN, the non-display area NA may be minimized to be invisible.

[0057] The display panel driving circuit may be connected to the display panel PN in any of various ways. For example, the gate driving unit GD may be provided on the non-display area NA by an in-panel-gate (GIP) method and between the sub-pixels SP in the display area AA by an in-active-area-gate (GIA) method. For example, the data driving unit DD and the timing controller TC may be formed on separate flexible films and printed circuit boards (PCBs), and are electrically connected to the display panel PN by bonding terminals of the flexible film to pad electrodes formed in the non-display area NA of the display panel PN. The flexible film bonded to the display panel PN may be connected to a PCB on which circuit elements are mounted and lines are formed.

[0058] A plurality of display modules may be implemented as a large-screen tiled display device by being coupled on a flat surface. The display modules may be implemented as a single display device by a combination of a plurality of display modules and implemented as a large-screen tiled display device. Each of the display modules may include a display panel PN, a driving circuit of the display panel PN, and circuit components and a module covering member coupled to the rear surface of the display panel PN.

[0059] Refer to Figure 2, the large-screen tiled display device TD includes a plurality of display modules disposed on the XY plane. Each of the display modules includes a display panel PN for reproducing an input image. When the non-display area NA is minimized at the front edge of each display panel PN, a large-screen image without visible seams between adjacent display panels PN can be reproduced.

[0060] The display panel PN can be assembled on a flat surface such that the distance D1 between the outermost pixels PX of one display panel PN and the outermost pixels PX of another display panel PN adjacent to the one display panel PN is substantially the same as the distance D2 between adjacent pixels PX in the display area AA of the display panel PN. As a result, since the distances D1 and D2 between the pixels PX are the same throughout the large-screen display area of the tiled display device TD, the seam area is invisible.

[0061] In the tiled display device TD, a plurality of display modules can share one timing controller TC. A host system can be connected to the plurality of timing controllers TC to send an image signal to be reproduced on all the display panels PN that implement the large screen of the tiled display device TD to the timing controller TC and can synchronize the timing controller TC.

[0062] In the tiled display device TD, the display panels PN can be coupled in units of blocks BL. In the figure, for ease of description, the display panel PN is shown as having four tiled blocks BL, but by applying the same block BL, additional blocks BL extending in the X direction and / or Y direction can be coupled to form the large-screen tiled display device TD.

[0063] In addition, in addition to Figure 2 the structure shown in which rectangular display panels PN are coupled, the tiled display device TD can have a honeycomb structure or a triangular structure.

[0064] In an embodiment, each sub-pixel included in the pixel PX can be a light-emitting diode LED or an inorganic light-emitting element (e.g., a micro-LED).

[0065] A micro-LED is an LED with a size ranging from 10 μm to 100 μm, and can be formed as follows: grow multiple thin films made of inorganic materials such as Al, Ga, N, P, As, or In on a sapphire substrate or a silicon substrate, and then cut and separate the sapphire substrate or the silicon substrate. Since micro-LEDs are formed in extremely small sizes, micro-LEDs can be transferred to a flexible substrate such as plastic, making it possible to manufacture a flexible display device. Different from an organic light-emitting layer, since micro-LEDs are formed by growing thin films made of inorganic materials, the manufacturing process is simplified and the yield is increased. By simply transferring individually separated micro-LEDs onto a large-area substrate, a large-area display device can be manufactured. Compared with LEDs made of organic light-emitting materials, micro-LEDs made of inorganic materials have the advantages of high brightness, long lifespan, and low unit cost.

[0066] Although various types of lines for thin-film transistors provided on a substrate are formed through a photolithography process, a panel PN in which sub-pixels are aggregated can be manufactured through a different process. A micro-LED large-screen tiled display device TD can be manufactured by transferring the panel PN manufactured in blocks through a separate process onto a substrate.

[0067] A method for manufacturing a micro-LED large-screen tiled display device TD may include: forming thin-film transistors (TFTs) and various lines on a substrate, transferring a micro-LED display panel PN manufactured in blocks onto the substrate on which the TFTs and various lines are formed, and tiling a plurality of micro-LED display panels PN, etc.

[0068] In an embodiment, in the case of tiling the panel PN while transferring the panel PN in units of blocks BL, a distance D2 between pixels PX existing within the same display panel PN and a distance D1 between adjacent pixels PX in different coupled display panels PN can be defined. Since the distance D2 between pixels PX included in the same display panel PN in the X direction and / or the Y direction is substantially the same, almost no error may occur.

[0069] When a panel PN is coupled to another panel, a distance D1 between pixels included in different panel PNs can be defined. Although it is preferable that D1 is substantially the same as D2 so that the boundary between panel PNs or blocks BL is invisible, an error may occur due to the mechanical process during transfer. In this case, D1 can have a value smaller than or larger than D2.

[0070] In an embodiment, the micro LEDs included in different blocks may not have the same light-emitting characteristics. It may be preferable that the light-emitting characteristics of the micro LEDs included in different blocks are substantially the same, such that the boundaries between the panel PN or the blocks BL are not visible. However, for example, in the manufacture of a display panel in units of blocks BL, the wavelengths of the micro LEDs having peak luminous intensities differ on the nm scale, and thus the light-emitting characteristics of the micro LEDs may be different.

[0071] Referring to Figure 3 , the tiled display device TD according to an embodiment may include four display panels PN. Each display panel PN may be manufactured and tiled in units of blocks BL.

[0072] In an embodiment, the tiled display device TD may have four display panels PN coupled in a first direction (e.g., the length (X) direction) and / or a second direction (e.g., the width (Y) direction) intersecting the first direction. The first direction may be interpreted as a row direction (or a row direction), and the second direction may be interpreted as a column direction (or a column direction).

[0073] The tiled display device TD according to an embodiment may include a plurality of pixel blocks BL2 and BL3 disposed along the X direction and the Y direction with respect to one pixel block BL1.

[0074] As an example, Figure 3 illustrates a first pixel block BL1, a second pixel block BL2 disposed along the X direction with respect to the first pixel block BL1, a third pixel block BL3 disposed along the Y direction with respect to the first pixel block BL1, and a fourth pixel block BL4 disposed at a portion where a virtual line extending along the Y direction with respect to the second pixel block BL2 and a virtual line extending along the X direction with respect to the third pixel block BL3 intersect. However, the present invention is not limited thereto, and as described above, as long as pixel blocks can be defined as being disposed in a first direction (e.g., the X direction) and a second direction (e.g., the Y direction) intersecting the first direction with respect to one pixel block, the pixel blocks may be included in the present invention.

[0075] The first pixel block BL1 may include a plurality of pixels PX disposed in the X direction and the Y direction. Figure 3 Illustrated is a first pixel block BL1 represented by 4 rows in the X direction and 3 rows in the Y direction, such that one pixel block BL1 includes 12 pixels PX. However, the present invention is not limited thereto, and since there are pixels having m rows (m is 1 or more) in the X direction and n rows (n is 1 or more) in the Y direction, one pixel block BL may include m×n pixels PX. The size of the pixel block BL is not limited to a specific size and may be set based on the results of an image quality evaluation experiment.

[0076] Each pixel block BL may include pixels that are most adjacent to the pixel blocks existing in the X direction and the pixel blocks existing in the Y direction (hereinafter referred to as "most adjacent pixels").

[0077] "Adjacent" indicates the relationship between pixels in two different pixel blocks or in the same pixel block that are set in the X direction and the pixel blocks, or between pixels where there is no other pixel in the X direction. Alternatively, "adjacent" indicates the relationship between pixels in two different pixel blocks or in the same pixel block that are set in the Y direction and the pixel blocks, or between pixels where there is no other pixel in the Y direction.

[0078] For example, the first pixel block BL1 may include the pixel PX1-(0,0) that is most adjacent to both the pixel block BL2 existing in the X direction and the pixel block BL3 existing in the Y direction.

[0079] The second pixel block BL2 may include the pixel PX2-(0,0) that is most adjacent to both the pixel block BL1 existing in the X direction and the pixel block BL4 existing in the Y direction.

[0080] The third pixel block BL3 may include the pixel PX3-(0,0) that is most adjacent to both the pixel block BL4 existing in the X direction and the pixel block BL1 existing in the Y direction.

[0081] The fourth pixel block BL4 may include the pixel PX4-(0,0) that is most adjacent to both the pixel block BL3 existing in the X direction and the pixel block BL2 existing in the Y direction.

[0082] However, this is a relative concept, and the pixels that are most adjacent to all pixel blocks may vary according to the specific positions of the pixel blocks existing in the X direction and the pixel blocks existing in the Y direction.

[0083] For example, two pixel blocks are provided in the X direction of the first pixel block BL1, and there may be a pixel block set in the +X direction relative to the first pixel block BL1 instead of a pixel block set in the -X direction (the second pixel block BL2). Similarly, two pixel blocks are provided in the Y direction of the first pixel block BL1, and there may be a pixel block set in the +Y direction relative to the first pixel block BL1 instead of a pixel block set in the -Y direction (the third pixel block BL3). As Figure 3 shown, when the first pixel block includes pixels arranged in 3×4, the pixel that is most adjacent to this pixel block is PX1-(3,2).

[0084] Each pixel included in the pixel block is indicated in the form of PXa-(b,c). Here, a represents the pixel block, b represents the reference number of the pixel in the X direction relative to the nearest pixel in the same pixel block, and c represents the reference number of the pixel in the Y direction relative to the nearest pixel in the same pixel block.

[0085] For example, the nearest pixel in the first pixel block is indicated by PX1-(0,0). In the first pixel block, the pixel located at a position that is 3 pixels spaced in the X direction and 2 pixels spaced in the Y direction from PX1-(0,0) is indicated by PX1-(3,2).

[0086] The nearest pixel in the second pixel block is indicated by PX2-(0,0). In the second pixel block, the pixel located at a position that is 0 pixels spaced in the X direction and 1 pixel spaced in the Y direction from PX2-(0,0) is indicated by PX2-(0,1).

[0087] The nearest pixel in the third pixel block is indicated by PX3-(0,0). In the third pixel block, the pixel located at a position that is 1 pixel spaced in the X direction and 0 pixels spaced in the Y direction from PX3-(0,0) is indicated by PX3-(1,0).

[0088] The nearest pixel in the fourth pixel block is indicated by PX4-(0,0). In the fourth pixel block, the pixel located at a position that is 1 pixel spaced in the X direction and 1 pixel spaced in the Y direction from PX4-(0,0) is indicated by PX4-(1,1).

[0089] Referring to Figure 4 , in an embodiment, one pixel may include six sub-pixels. Each of the six sub-pixels may be a main light-emitting element and an auxiliary light-emitting element for a first color, a main light-emitting element and an auxiliary light-emitting element for a second color, and a main light-emitting element and an auxiliary light-emitting element for a third color.

[0090] The first color to the third color may be any one selected from the group including blue, green, and red, and may not overlap with each other. For example, the first color, the second color, and the third color may be red, blue, and green respectively, or may be blue, red, and green respectively, but are not limited thereto.

[0091] Each sub-pixel included in the pixel is indicated in the form of SPad-(b,c) or SP*ad-(b,c).

[0092] Each of SP and SP* is any one selected from a group including a main light-emitting element and an auxiliary light-emitting element of the same color, and they do not overlap with each other. * does not specify any one of the main light-emitting element and the auxiliary light-emitting element, and is instructed to distinguish the main light-emitting element and the auxiliary light-emitting element from each other.

[0093] a represents a pixel block, d represents the color represented by a sub-pixel, b represents the reference number of the pixel in the X direction with respect to the nearest pixel in the pixel block including the pixel containing the sub-pixel, and c represents the reference number of the pixel in the Y direction with respect to the nearest pixel in the pixel block including the pixel containing the sub-pixel.

[0094] For example, referring to Figure 3 and Figure 4 , Figure 4 shows the sub-pixels included in the pixel PX1-(0,0) that is nearest to the first pixel block BL1.

[0095] The main light-emitting element and the auxiliary light-emitting element for the first color are SP11-(0,0) and SP*11-(0,0) or SP*11-(0,0) and SP11-(0,0) respectively, the main light-emitting element and the auxiliary light-emitting element for the second color are SP12-(0,0) and SP*12-(0,0) or SP*12-(0,0) and SP12-(0,0) respectively, and the main light-emitting element and the auxiliary light-emitting element for the third color are SP13-(0,0) and SP*13-(0,0) or SP*13-(0,0) and SP13-(0,0) respectively.

[0096] Sub-pixels for different colors may have different light-emitting characteristics. The light-emitting characteristics of a sub-pixel may indicate the wavelength band of the color indicated by the sub-pixel.

[0097] Referring to Figure 5 , blue, green, and red may have different wavelength bands and exhibit different light-emitting characteristics. For example, blue may have a wavelength band of 450 nm to 495 nm, green may have a wavelength band of 495 nm to 570 nm, and red may have a wavelength band of 620 nm to 750 nm. However, the present invention is not specific, and depending on the operator, there may be differences between the upper limit and the lower limit of the wavelength band for the same color.

[0098] In Figure 5 , the X-axis indicates the range of the wavelength band of the color sensed by the human cone cells (about 380 nm to 750 nm), and the Y-axis indicates the relative value of the light-emitting intensity (in arbitrary units (a.u.)).

[0099] In the following Figures 6 to 8 , except for some differences in the numerical range of the X-axis, the units of the X-axis and the Y-axis are the same as those inFigure 5 Same as that in

[0100] Sub-pixels of the same color may have different light-emitting characteristics. The light-emitting characteristics of a sub-pixel may indicate the light-emitting intensity distribution according to the wavelength band of the color represented by the sub-pixel. Photometric methods known in the art for analyzing the light-emitting intensity distribution may be used, and for example, absorptiometry using Lambert-Beer's law may be used for analysis.

[0101] In the light-emitting intensity distribution, the light-emitting intensity represents the intensity of light from a light source in a specific direction and may be expressed as luminous intensity. The light-emitting intensity distribution indicates the distribution of the light-emitting intensity according to the wavelength band of light of a specific color.

[0102] Even sub-pixels representing the same color may have different light-emitting characteristics. When the light-emitting intensity distributions are different, the peak wavelengths may be the same or different. The peak wavelength may indicate the wavelength having the highest light-emitting intensity in the wavelength band of a graph showing the light-emitting intensity distribution of a sub-pixel representing a specific color among the first to third colors.

[0103] Figure 6 and Figure 7 shows the shape of the light-emitting intensity distribution graph according to the wavelength band of the red light-emitting element.

[0104] The X-axis indicates wavelengths in the range of approximately 620 nm to 750 nm. The first red light-emitting intensity distribution may have a first peak wavelength, the second red light-emitting intensity distribution may have a second peak wavelength, and the third red light-emitting intensity distribution may have a third peak wavelength.

[0105] The sub-pixels SP11-(0,0) and SP*11-(0,0) included in one pixel PX1-(0,0) and representing the first color (e.g., red) may have a first red light-emitting intensity distribution and a second red light-emitting intensity distribution, respectively. SP11-(0,0) and SP*11-(0,0) may have a first peak wavelength and a second peak wavelength and have different light-emitting characteristics.

[0106] The light quantity may indicate a color and indicate the total light quantity emitted by the light-emitting sub-pixel. The light quantity may be proportional to the value obtained by integrating the light-emitting intensity distribution graph. In Figure 6 , since the Y-axis is in arbitrary units (a.u.), the first red light quantity may be proportional to the light quantity of the light-emitting element having the first red light-emitting intensity distribution.

[0107] Brightness may indicate a color and indicate the light quantity reflected from the target surface in the light-emitting sub-pixel. According to the standard of the target surface, brightness may be proportional to the light quantity.

[0108] When SP11-(0,0) and SP*11-(0,0) with different light-emitting characteristics emit light respectively, their light quantity and / or brightness can be the same. The light quantity ratio of SP11-(0,0) to SP*11-(0,0) can be 1:1.

[0109] When a pixel PX1-(0,0) emits light of only the first color (for example, one of red, green, and blue), only the sub-pixels SP11-(0,0) and SP*11-(0,0) included in the corresponding pixel and having different light-emitting characteristics can emit light. In the case where both SP11-(0,0) and SP*11-(0,0) emit light, the light-emitting characteristics of SP11-(0,0), the light-emitting characteristics of SP*11-(0,0), and the light-emitting characteristics of PX1-(0,0) are different, and the light-emitting characteristics of SP11-(0,0) and SP*11-(0,0) can be different. In addition, the light-emitting intensity distributions and peak wavelengths of these sub-pixels and PX1-(0,0) can be different.

[0110] Referring to Figure 8 , in the case where both the main light-emitting element SP and the auxiliary light-emitting element SP* with different light-emitting intensity distributions emit light, the light-emitting intensity distribution of the pixel PX can be changed by using the light-emitting intensity distributions of SP and SP* as variables.

[0111] Although the sub-pixels SP and SP* included in the pixel PX may not exactly match due to other variables such as constructive interference caused between them when emitting light, the light-emitting intensity of the pixel PX at a specific wavelength can be substantially the same as the sum of the light-emitting intensity of SP at that wavelength and the light-emitting intensity of SP* at that wavelength.

[0112] In addition, since the light-emitting intensity distributions of SP, SP*, and PX are different, their corresponding peak wavelengths can be different. Regarding the above light quantity, unless other variables such as constructive interference caused by the sub-pixels SP and SP* included in the pixel PX when emitting light are considered, the light quantity of PX can be substantially the same as the sum of the light quantity of SP and the light quantity of SP*.

[0113] The first pixel PX1-(0,0) that emits light of only the first color (one of red, green, and blue) can include sub-pixels SP11-(0,0) and SP*11-(0,0) for the first color with different light-emitting intensity distributions. The second pixel PX2-(0,0) that emits light of only the first color can include sub-pixels SP21-(0,0) and SP*21-(0,0) for the first color with different light-emitting intensity distributions.

[0114] The light emission characteristics and / or light intensity distributions of the first pixel PX1-(0,0) and the second pixel PX2-(0,0) that emit light of only the first color (one of red, green, and blue) may be different.

[0115] As described above, the light quantity and / or brightness of SP11-(0,0) and SP*11-(0,0) having different light emission characteristics may be the same. In this case, the light quantity ratio of SP11-(0,0) and SP*11-(0,0) may be 1:1.

[0116] Similarly, when PX1-(0,0) and PX2-(0,0) having different light emission characteristics each emit light of the same color, their light quantity and / or brightness may be the same.

[0117] Referring to Figures 9 to 11 , according to an embodiment, the tiled display device TD may include a screen in which the first pixel block BL1 and the second pixel block BL2 are coupled on the same XY plane. However, the present invention is not limited thereto, and the screen may indicate a component in which at least three of the blocks BL1, BL2, BL3, and BL4 are coupled on the same plane.

[0118] The screen may include a plurality of pixel blocks BL1, BL2, BL3, and BL4, and each pixel block may include a plurality of pixels PX.

[0119] Having referred to Figure 3 The directions in which a plurality of pixel blocks are arranged have been described.

[0120] The first pixel block BL1 may include a pixel PX1-(0,0) that is most adjacent to both the second pixel block BL2 and the third pixel block BL3. PX1-(0,0) may include at least two sub-pixels SP11-(0,0) and SP*11-(0,0) that emit light in a wavelength band of the first color.

[0121] The second pixel block BL2 may include a pixel PX2-(0,0) that is most adjacent to both the first pixel block BL1 and the fourth pixel block BL4. PX2-(0,0) may be set to be spaced apart from PX1-(0,0) in the X direction. PX2-(0,0) may include at least two sub-pixels SP21-(0,0) and SP*21-(0,0) that emit light in a wavelength band of the first color.

[0122] The third pixel block BL3 may include the pixel PX3-(0,0) that is most adjacent to both the first pixel block BL1 and the fourth pixel block BL4. PX3-(0,0) may be set to be spaced apart from PX1-(0,0) in the Y direction and spaced apart from PX4-(0,0) in the X direction. PX3-(0,0) may include at least two sub-pixels SP31-(0,0) and SP*31-(0,0) that emit light in a band of the first color.

[0123] Based on the above description, all sub-pixels may emit light in a band of the same first color.

[0124] In an embodiment, the tiled display device TD may include a first region 12 and a second region 13. The first region 12 includes PX1-(0,0) and PX2-(0,0), and the second region 13 includes PX1-(0,0) and PX3-(0,0). The tiled display device TD may include a distance B1 set between the boundaries of different pixel blocks BL1 and BL2 in the X direction. The tiled display device TD may include a distance B2 set between the boundaries of different pixel blocks BL1 and BL3 in the Y direction.

[0125] The distance D11 between the pixels PX1-(0,0) and PX2-(0,0) included in different pixel blocks BL1 and BL2 in the X direction may be relatively greater than or less than the distance D21 between the pixels PX1-(0,0) and PX1-(1,0) included in the same pixel block BL1.

[0126] When D11 is relatively greater than D21, as shown in (a) of Figure 10 a brightness deviation may occur between the first region 12 and the region including pixels with a relatively smaller distance (e.g., PX1-(0,0) and PX1-(1,0)), and thus dark spots may be visible.

[0127] When D11 is relatively less than D21, as shown in (b) of Figure 10 a brightness deviation may occur between the first region 12 and the region including pixels with a relatively larger distance (e.g., PX1-(0,0) and PX1-(1,0)), and thus bright spots may be visible.

[0128] The distance D12 between the pixels PX1-(0,0) and PX3-(0,0) included in different pixel blocks BL1 and BL3 in the Y direction may be relatively greater than or less than the distance D22 between the pixels PX1-(0,0) and PX1-(0,1) included in the same pixel block BL1.

[0129] When D12 is relatively greater than D22, as shown in Figure 10As shown in (c) thereof, a luminance deviation may occur between the second region 13 and a region including pixels with a relatively small distance (e.g., PX1-(0,0) and PX1-(0,1)), and thus dark spots may be visible.

[0130] When D12 is relatively smaller than D22, as Figure 10 shown in (d) thereof, a luminance deviation may occur between the second region 13 and a region including pixels with a relatively large distance (e.g., PX1-(0,0) and PX1-(0,1)), and thus bright spots may be visible.

[0131] As described above, the light quantity and / or luminance of SP11-(0,0) and SP*11-(0,0) having different light-emitting characteristics may be the same. In this case, the light quantity ratio of SP11-(0,0) to SP*11-(0,0) may be 1:1. When PX1-(0,0) and PX2-(0,0) having different light-emitting characteristics emit light of the same color (e.g., any one of red, green, and blue), their light quantity and / or luminance may be the same.

[0132] Similarly, when the first region 12 and the second region 13 emit light of the same color, their light quantity and / or luminance are the same, and the light-emitting characteristics of the first region 12 and the second region 13 may be different.

[0133] When D11 is greater than D21, the pixels with a relatively large distance between adjacent pixels may be PX1-(0,0) and PX2-(0,0). In this case, the pixels with a relatively small distance may be PX1-(0,0) and PX1-(1,0). When D12 is greater than D22, the pixels with a relatively large distance between adjacent pixels may be PX1-(0,0) and PX3-(0,0). In this case, the pixels with a relatively small distance may be PX1-(0,0) and PX1-(0,1).

[0134] When D11 is less than D21, the pixels with a relatively small distance between adjacent pixels may be PX1-(0,0) and PX2-(0,0). In this case, the pixels with a relatively large distance may be PX1-(0,0) and PX1-(1,0). When D12 is less than D22, the pixels with a relatively small distance between adjacent pixels may be PX1-(0,0) and PX3-(0,0). In this case, the pixels with a relatively large distance may be PX1-(0,0) and PX1-(0,1).

[0135] Referring to Figure 12A, under the condition that the brightness of the first color in the first region 12 is the same as the brightness of the first color in the second region 13, when the distance between adjacent pixels is relatively large (for example, D11 > D21 and D12 > D22), among "any one of the pixels PX1-(0,0) and PX2-(0,0) arranged in the X direction (for example, PX1-(0,0))" and "any one of the pixels PX1-(0,0) and PX3-(0,0) arranged in the Y direction (for example, PX1-(0,0))", the sum of the brightnesses of the sub-pixels (for example, SP11-(0,0) and SP*11-(0,0)) can be greater than the sum of the brightnesses of the sub-pixels (for example, SP11-(1,0) and SP*11-(1,0), and SP11-(0,1) and SP*11-(0,1)) included in the pixels where the distance between adjacent pixels is relatively small (for example, PX1-(1,0) and PX1-(0,1)).

[0136] Therefore, it is possible to compensate for the dark spots caused by the distance deviation between pixels that may occur during the process of transferring the panel in units of blocks. In addition, by increasing the overall brightness of the pixels included in the regions 12 and 13 with a relatively large distance deviation, it is possible to compensate for the dark spots that appear in the X direction and the Y direction that intersect each other and the dark spots that may appear at the intersection IS (see Figure 11 A and Figure 11 C). According to the embodiment, the image quality and visibility of the tiled display device can be improved.

[0137] Referring to Figure 12B , in the embodiment, the light quantity ratio of the sub-pixels (for example, SP11-(0,0) and SP*11-(0,0)) of one of the pixels PX1-(0,0) and PX2-(0,0) with a relatively large distance between adjacent pixels can be different from the light quantity ratio of the sub-pixels (for example, SP11-(1,0) and SP*11-(1,0)) of one of the pixels PX1-(0,0) and PX1-(1,0) with a relatively small distance between adjacent pixels.

[0138] In the embodiment, only any one of the sub-pixels SP11-(1,0) and SP*11-(1,0) of one of the pixels with a relatively small distance between adjacent pixels can emit light. SP11-(1,0) can be in the off state, and SP*11-(1,0) can be in the on state. The light quantity ratio of the sub-pixels SP11-(1,0) and SP*11-(1,0) can be 1:0 or 0:1.

[0139] Since the light quantity ratios of sub-pixels SP11-(0,0) and SP*11-(0,0) of one of the pixels with a relatively large distance between adjacent pixels are different from the above-described light quantity ratios, both sub-pixels SP11-(0,0) and SP*11-(0,0) can emit light under the first condition.

[0140] In an embodiment, in order to compensate for dark spots, while maintaining the light quantity ratio, without additionally increasing the brightness of a previously emitting sub-pixel (e.g., SP11-(0,0)), the light quantity of another sub-pixel (e.g., SP*11-(0,0)) in the same pixel of the same color is additionally increased. Therefore, the lifespan of the sub-pixel can be extended and performance degradation can be prevented.

[0141] In an embodiment, although the light quantity ratios of the sub-pixels included in the pixels arranged in the X direction are described, the light quantity ratios of sub-pixels SP11-(0,0) and SP*11-(0,0) included in pixel PX1-(0,0) which is a pixel arranged in the Y direction and the light quantity ratios of sub-pixels SP11-(0,1) and SP*11-(0,1) included in pixel PX1-(0,1) which is a pixel arranged in the Y direction can be different.

[0142] Refer to Figure 13 , in an embodiment, under the condition that the brightness of the first color in the first region 12 and the brightness of the first color in the second region 13 are the same, when the distance between adjacent pixels is relatively small (e.g., D11 < D21 and D12 < D22), the sum of the brightnesses of the sub-pixels (e.g., SP11-(0,0) and SP*11-(0,0)) included in any one of the pixels arranged in the X direction (e.g., PX1-(0,0)) and the pixels arranged in the Y direction (e.g., PX1-(0,0)) and PX3-(0,0)) (e.g., PX1-(0,0)) can be less than the sum of the brightnesses of the sub-pixels (e.g., SP11-(1,0) and SP*11-(1,0)) included in the pixels with a relatively large distance between adjacent pixels (e.g., PX1-(1,0) and PX1-(0,1)).

[0143] Therefore, in an embodiment, it is possible to compensate for bright spots caused by distance deviations between pixels that may occur during the process of transferring the panel in units of blocks. In addition, by reducing the overall brightness of the pixels included in regions 12 and 13 with relative distance deviations, it is possible to compensate for bright spots that appear in the X direction and the Y direction that intersect each other and bright spots that may appear at the intersection IS (see Figure 11 B and Figure 11 D). According to the embodiment, the image quality and visibility of the tiled display device can be improved.

[0144] In an embodiment, the light quantity ratio of sub-pixels (e.g., SP11-(0,0) and SP*11-(0,0)) of one of pixels PX1-(0,0) and PX2-(0,0) with a relatively small distance between adjacent pixels (e.g., PX1-(0,0)) may be the same as the light quantity ratio of sub-pixels (e.g., SP11-(1,0) and SP*11-(1,0)) of one of pixels PX1-(0,0) and PX1-(1,0) with a relatively large distance between adjacent pixels (e.g., PX1-(1,0)).

[0145] In an embodiment, only any one of sub-pixels SP11-(1,0) and SP*11-(1,0) of one of the pixels with a relatively large distance between adjacent pixels may emit light. SP11-(1,0) may be in an off state, and SP*11-(1,0) may be in an on state. SP11-(1,0) may be in an on state, and SP*11-(1,0) may be in an off state. The light quantity ratio of sub-pixels SP11-(1,0) and SP*11-(1,0) may be 1:0 or 0:1.

[0146] Since the light quantity ratio of sub-pixels SP11-(0,0) and SP*11-(0,0) of one of the pixels with a relatively small distance between adjacent pixels is the same as the above light quantity ratio, only any one of sub-pixels SP11-(0,0) and SP*11-(0,0) may emit light.

[0147] In an embodiment, in order to compensate for bright spots, without additionally driving another sub-pixel (e.g., SP*11-(0,0)) in the same pixel for the same color by only additionally reducing the brightness of the previously emitting sub-pixel (e.g., SP11-(0,0)) while maintaining the light quantity ratio.

[0148] The light quantity ratio of sub-pixels SP11-(0,0) and SP*11-(0,0) of one of the pixels with a relatively small distance between adjacent pixels may be the same as the light quantity ratio of sub-pixels SP11-(1,0) and SP*11-(1,0) of one of the pixels with a relatively large distance between adjacent pixels, and the sum of the brightnesses of the sub-pixels included in each of the pixels may be different. Specifically, the sum of the brightnesses of sub-pixels SP11-(0,0) and SP*11-(0,0) of one of the pixels with a relatively small distance between adjacent pixels may be smaller.

[0149] According to an embodiment, the drive current of the emitting sub-pixel may be reduced, and the power consumption of the tiled display device may be reduced.

[0150] In an embodiment, although the light quantity ratio of the sub-pixels included in the pixels arranged in the X direction is described (seeFigure 13 ) However, the light quantity ratios of the sub-pixels SP11-(0,0) and SP*11-(0,0) included in the pixel PX1-(0,0) which is a pixel set in the Y direction and the light quantity ratios of the sub-pixels SP11-(0,1) and SP*11-(0,1) included in the pixel PX1-(0,1) which is a pixel set in the Y direction can be the same. Specifically, the light quantity ratios can be the same, and the sum of the brightnesses of the sub-pixels included in each of the pixels can be different. More specifically, the sum of the brightnesses of the sub-pixels SP11-(0,0) and SP*11-(0,0) can be relatively small.

[0151] In an embodiment, the distance between adjacent pixels can correspond to all pixels where the distance between adjacent pixels is relatively large and / or the distance between adjacent pixels is relatively small. For example, when the distance between the pixels set in the X direction (e.g., PX1-(0,0) and PX2-(0,0)) is relatively large and the distance between the pixels set in the Y direction (e.g., PX1-(0,0) and PX3-(0,0)) is relatively large, there may be a deviation in each of the sums of the brightnesses of the sub-pixels set in the pixels set in the X direction and the Y direction.

[0152] Alternatively, for example, when the distance between the pixels set in the X direction (e.g., PX1-(0,0) and PX2-(0,0)) is relatively large and the distance between the pixels set in the Y direction (e.g., PX1-(0,0) and PX3-(0,0)) is relatively small, there may be a deviation in each of the sums of the brightnesses of the sub-pixels set in the pixels set in the X direction and the Y direction.

[0153] Alternatively, when the distance between the pixels set in the X direction (e.g., PX1-(0,0) and PX2-(0,0)) is relatively small and the distance between the pixels set in the Y direction (e.g., PX1-(0,0) and PX3-(0,0)) is relatively large, there may be a deviation in each of the sums of the brightnesses of the sub-pixels set in each of the pixels set in the X direction and the Y direction..

[0154] Alternatively, when the distance between the pixels set in the X direction (e.g., PX1-(0,0) and PX2-(0,0)) is relatively small and the distance between the pixels set in the Y direction (e.g., PX1-(0,0) and PX3-(0,0)) is relatively small, there may be a deviation in each of the sums of the brightnesses of the sub-pixels set in each of the pixels set in the X direction and the Y direction.

[0155] Therefore, it is possible to compensate for the dark dots that appear in the X direction and the Y direction intersecting each other and the dark dots that may appear at the intersection IS. Since the dark dots and bright dots are compensated in the first direction, the second direction, and the direction between the first direction and the second direction of the tiled display device, it is possible to improve the image quality in the entire region including the boundaries between the blocks of the display device and improve color reproducibility.

[0156] Referring to Figure 14 , the dark dot and bright dot compensation algorithm of the tiled display device measures the brightness of the tiled display device and determines whether a dark dot or a bright dot appears. When no dark dot or bright dot appears, the algorithm ends. In the case of being classified as a dark dot, the brightness of the sub-pixel included in one of the adjacent pixels is increased. In the case of being classified as a bright dot, the brightness of the sub-pixel included in one of the adjacent pixels is decreased. In order to determine whether the dark dot and the bright dot still exist, the brightness of the tiled display device with the corrected brightness is re-measured. In the case of not appearing, the algorithm ends, and in the case of appearing, the process corresponding to the case classified as a dark dot or a bright dot is repeated.

[0157] As described above with reference to Figures 6 to 8 , sub-pixels having different luminous intensity distributions may have the same or different peak wavelengths, and the peak wavelength may indicate the wavelength having the highest luminous intensity in the luminous intensity distribution of the sub-pixel representing a specific color. In this case, although the same color is represented, even when the same color is achieved, due to different wavelengths, there are deviations in the saturation and / or brightness of the color, and when the observer recognizes the deviation, the color reproducibility may be reduced.

[0158] The first pixel PX1-(0,0) may include at least two sub-pixels SP11-(0,0) and SP*11-(0,0) that emit light in a band of a first color (e.g., red). The second pixel PX2-(0,0) that is set to be spaced apart from the first pixel PX1-(0,0) in the X direction and adjacent to the first pixel may include at least two sub-pixels SP21-(0,0) and SP*21-(0,0) that emit light in the red band.

[0159] SP21-(0,0) may be set to be spaced apart from SP11-(0,0) in the X direction, and SP*21-(0,0) may be set to be spaced apart from SP*11-(0,0) in the X direction.

[0160] Referring to Figure 15A, in the first pattern, under the condition that the luminance of the first color of the first pixel PX1-(0,0) is the same as the luminance of the first color of the second pixel PX2-(0,0), SP11-(0,0) and SP*21-(0,0) can be in the on state, and SP*11-(0,0) and SP21-(0,0) can be in the off state. Under the condition that the luminance of the first color of the first pixel PX1-(0,0) is the same as the luminance of the first color of the second pixel PX2-(0,0), the first pattern can be the following pattern: where the light quantity ratio of SP11-(0,0) to SP*11-(0,0) is 1:0 and the light quantity ratio of SP21-(0,0) to SP*21-(0,0) is 0:1. Refer to Figure 15B , in the second pattern, under the condition that the luminance of the first color of the first pixel PX1-(0,0) is the same as the luminance of the first color of the second pixel PX2-(0,0), SP11-(0,0) and SP*21-(0,0) can be in the off state, and SP*11-(0,0) and SP21-(0,0) can be in the on state. Under the condition that the luminance of the first color of the first pixel PX1-(0,0) is the same as the luminance of the first color of the second pixel PX2-(0,0), the second pattern can be the following pattern: where the light quantity ratio of SP11-(0,0) to SP*11-(0,0) is 0:1, and the light quantity ratio of SP21-(0,0) to SP*21-(0,0) is 1:0.

[0161] Hereinafter, when the light quantity ratio of a certain sub-pixel to another sub-pixel is 1:0, the sub-pixel with a light quantity ratio of 1 can be regarded as being in the on state, and the sub-pixel with a light quantity ratio of 0 can be regarded as being in the off state.

[0162] In the tiled display device according to the embodiment, the first pattern and the second pattern can be driven alternately in time. In the embodiment, different sub-pixels SP11-(0,0) and SP*11-(0,0) included in the same pixel (e.g., PX1-(0,0)) can be driven at different times. The different time driving conditions are: the flicker that occurs when driving sub-pixels representing the same color alternately in time is invisible. It will be described in detail with reference to Figure 16 It will be described in detail.

[0163] Refer to Figure 16 , when any one of the first pattern and the second pattern appears in a frame, when driving the sub-pixels at 60 Hz or higher, the flicker may be invisible. When the luminance of the sub-pixels is low (e.g., 0.004 cd / m 2 or lower), when driving the sub-pixels alternately at 20 Hz or higher, the flicker of the sub-pixels may be invisible.

[0164] By driving sub-pixels alternately in time as described above, the deviation with respect to the target peak wavelength in the tiled display device can be reduced. Therefore, the deviation in brightness or color / saturation that appears at the boundary of the tiled display device may be invisible, thereby improving color reproducibility and the image quality of the display device.

[0165] Figure 17A 、 Figure 17B 、 Figure 18A and Figure 18B show exemplary driving patterns of corresponding sub-pixels in the embodiment. Different numbers of pixels are shown compared to Figure 16 .

[0166] Referring to Figure 17A and Figure 17B , in the embodiment, the first pattern may be a pattern where the light quantity ratio of SP11-(0,0) to SP*11-(0,0), the light quantity ratio of SP11-(0,1) to SP*11-(0,1), the light quantity ratio of SP11-(0,2) to SP*11-(0,2), and the light quantity ratio of SP11-(0,3) to SP*11-(0,3) is 1:0, and the light quantity ratio of SP21-(0,0) to SP*21-(0,0), the light quantity ratio of SP21-(0,1) to SP*21-(0,1), the light quantity ratio of SP21-(0,2) to SP*21-(0,2), and the light quantity ratio of SP21-(0,3) to SP*21-(0,3) is 0:1 (see Figure 17A ). The second pattern may be a pattern where the light quantity ratio of SP11-(0,0) to SP*11-(0,0), the light quantity ratio of SP11-(0,1) to SP*11-(0,1), the light quantity ratio of SP11-(0,2) to SP*11-(0,2), and the light quantity ratio of SP11-(0,3) to SP*11-(0,3) is 0:1, and the light quantity ratio of SP21-(0,0) to SP*21-(0,0), the light quantity ratio of SP21-(0,1) to SP*21-(0,1), the light quantity ratio of SP21-(0,2) to SP*21-(0,2), and the light quantity ratio of SP21-(0,3) to SP*21-(0,3) is 1:0 (see Figure 17B ).

[0167] Referring to Figure 18A and Figure 18B, in an embodiment, the first pattern may be a pattern where the light quantity ratio of SP11-(0,0) to SP*11-(0,0), the light quantity ratio of SP11-(2,0) to SP*11-(2,0), the light quantity ratio of SP31-(0,0) to SP*31-(0,0), and the light quantity ratio of SP31-(2,0) to SP*31-(2,0) is 1:0, and the light quantity ratio of SP11-(1,0) to SP*11-(1,0), the light quantity ratio of SP11-(3,0) to SP*11-(3,0), the light quantity ratio of SP31-(1,0) to SP*31-(1,0), and the light quantity ratio of SP31-(3,0) to SP*31-(3,0) is 0:1 (see Figure 18A ). The second pattern may be a pattern where the light quantity ratio of SP11-(0,0) to SP*11-(0,0), the light quantity ratio of SP11-(2,0) to SP*11-(2,0), the light quantity ratio of SP31-(0,0) to SP*31-(0,0), and the light quantity ratio of SP31-(2,0) to SP*31-(2,0) is 0:1, and the light quantity ratio of SP11-(1,0) to SP*11-(1,0), the light quantity ratio of SP11-(3,0) to SP*11-(3,0), the light quantity ratio of SP31-(1,0) to SP*31-(1,0), and the light quantity ratio of SP31-(3,0) to SP*31-(3,0) is 1:0 (see Figure 18B ).

[0168] According to the embodiment, since the first pattern and the second pattern can appear alternately in time, image quality deterioration caused by deviation of the peak wavelength of sub-pixels at the boundary between the first pixel block BL1 and the second pixel block BL2 and / or at the boundary between the first pixel block BL1 and the third pixel block BL3 can be prevented. Therefore, the visibility of the tiled display device can be improved.

[0169] In an embodiment, under the condition that the brightness of the first color of PX1-(0,0) is the same as the brightness of the first color of PX2-(0,0), the light quantity ratio of SP11-(0,0) to SP*11-(0,0) can be in the range of 1:0.1 to 0.1:1, and the light quantity ratio of SP21-(0,0) to SP*21-(0,0) can be in the range of 1:0 to 0:1. SP11-(0,0) and SP*11-(0,0) can be driven simultaneously.

[0170] Referring to Figure 19When the light quantity ratio of SP21-(0,0) to SP*21-(0,0) is 1:0 or 0:1, it can correspond to the case where only any one of the sub-pixels (e.g., SP*21-(0,0)) emits light. When the light quantity ratio of SP21-(0,0) to SP*21-(0,0) is 1:0 or 0:1, it can correspond to the state where only any one of the sub-pixels (e.g., SP*21-(0,0)) is turned on.

[0171] When only any one of the sub-pixels (e.g., SP11-(0,0)) included in the same pixel (e.g., PX1-(0,0)) emits light to generate a wavelength distribution, the image quality of the display device may deteriorate.

[0172] When driving the sub-pixels, sub-pixels (e.g., SP*11-(0,0)) having a wavelength similar to that of the light-emitting sub-pixels among SP21-(0,0) and SP*21-(0,0)) can be additionally driven. The light quantity ratio between SP11-(0,0) and SP*11-(0,0) can be in the range of 1:0.1 to 0.1:1. Hereinafter, when the light quantity ratio of a certain sub-pixel to another sub-pixel is 1:0.1, the sub-pixel with a light quantity ratio of 1 can be regarded as being in the on state, and the sub-pixel with a light quantity ratio of 0.1 can be regarded as being in the on state. The deviation of the peak wavelengths of the previously driven SP11-(0,0) and SP*21-(0,0) can be reduced by the additionally driven SP*11-(0,0). According to an embodiment, deterioration of the image quality due to the wavelength deviation of the sub-pixels at the boundary can be prevented. Therefore, the visibility of the tiled display device can be improved and the color reproducibility can be improved.

[0173] The relationship between sub-pixels having "similar wavelengths" can mean that the absolute value of the difference between the peak wavelengths is 0 nm or more and 5 nm or less. By additionally driving sub-pixels having similar wavelengths among the sub-pixels included in adjacent pixels, the wavelength mixing effect can be improved. Therefore, the image quality of the display device can be further improved.

[0174] The brightness of simultaneously driven SP11-(0,0) and SP*11-(0,0) can be half of the brightness of normal driving.

[0175] The "brightness of normal driving" of SP11-(0,0) can indicate the brightness of SP11-(0,0) that emits light when the corresponding display device is driven. The "brightness of normal driving" of SP*11-(0,0) can indicate the light-emitting brightness of SP*11-(0,0) when the corresponding display device is driven while SP*11-(0,0) emits light.

[0176] Since two or more sub-pixels representing a specific color in a pixel PX1-(0,0) can emit light to rapidly increase brightness, according to an embodiment, SP*11-(0,0) can be additionally driven, and a bright spot that may appear between PX1-(0,0) and PX2-(0,0) can be prevented.

[0177] Figure 20 and Figure 21 shows an exemplary driving pattern of corresponding sub-pixels in an embodiment. Compared with Figure 19 the number of pixels shown is different.

[0178] Figure 20 shows sub-pixels (e.g., SP11-(0,2) and SP21-(0,2) or SP*11-(0,2) and SP*21-(0,2)) (hereinafter referred to as "corresponding sub-pixels") among sub-pixels representing a first color included in pixels (e.g., PX1-(0,2) and PX2-(0,2)) that are spaced the same distance from the most adjacent pixels (PX1-(0,0) and PX2-(0,0)) in the Y direction, and the most adjacent pixels (PX1-(0,0) and PX2-(0,0)) are reference points in each of pixel blocks BL1 and BL2, in the X direction.

[0179] Referring to Figure 20 , in a tiled display device according to an embodiment, when the peak wavelength is similar to SP*11-(0,0) which is a sub-pixel corresponding to SP*21-(0,0), both SP11-(0,0) and SP*11-(0,0) are driven, and when the peak wavelength is not similar to SP*11-(0,1) which is a sub-pixel corresponding to SP*21-(0,1), any one of SP11-(0,0) and SP*11-(0,0) can be driven.

[0180] The embodiment describes sub-pixels included in pixel blocks BL1 and BL2 arranged in the X direction, but as Figure 21 shown, the embodiment can also be applied to pixel blocks BL1 and BL3 arranged in the Y direction.

[0181] As described above, the light-emitting characteristics and / or light-emitting intensity distributions of the first pixel PX1-(0,0) and the second pixel PX2-(0,0) that emit only light of the same color may be different. When SP*11-(0,0) having a wavelength similar to that of SP*21-(0,0) is additionally driven, even when the brightness of the two pixels is the same, the light-emitting intensity distribution of PX1-(0,0) for the first color and the light-emitting intensity distribution of PX2-(0,0) for the first color may be different.

[0182] Refer to Figure 22 In an embodiment, under the condition that the luminance of the first color of PX1-(0,0) is the same as the luminance of the first color of PX2-(0,0), the light quantity ratio of SP11-(0,0) to SP*11-(0,0) can be in the range of 1:0.1 to 0.1:1, and the light quantity ratio of SP21-(0,0) to SP*21-(0,0) can be in the range of 1:0.1 to 0.1:1. Specifically, the sub-pixels SP21-(0,0) and SP*21-(0,0) of the first color of PX2-(0,0) can both emit light.

[0183] When driving all sub-pixels with different wavelengths, the deviation caused by the distribution of peak wavelengths can be reduced, and the image quality of the display device can be improved. In addition, the visibility can be improved and the color performance or reproducibility can be made uniform.

[0184] In one embodiment, under the condition that the luminance of the first color of PX1-(0,0) is the same as the luminance of the first color of PX2-(0,0) (PX2-(0,0) and PX1-(0,0) are adjacent), the light quantity ratio of SP11-(0,0) to SP*11-(0,0) can be the same as the light quantity ratio of SP21-(0,0) to SP*21-(0,0). Specifically, the light quantity ratio of SP11-(0,0) to SP*11-(0,0) can be the same as the light quantity ratio of SP21-(0,0) to SP*21-(0,0). Therefore, the drive current for adjusting the light quantity of the display device can be easily and simply adjusted, thereby reducing the power consumption of the display device.

[0185] Figure 23 and Figure 24 shows an exemplary drive pattern of corresponding sub-pixels in an embodiment. Compared with Figure 22 , the number of pixels shown is different.

[0186] Refer to Figure 23 , in the tiled display device according to the embodiment, all corresponding sub-pixels representing the same color in adjacent pixels included in different pixel blocks can be driven.

[0187] The embodiment describes the sub-pixels included in the pixel blocks BL1 and BL2 arranged in the X direction, but as Figure 24 shown, the embodiment can also be applied to the pixel blocks BL1 and BL3 arranged in the Y direction.

[0188] According to the embodiment, it is possible to compensate for dark spots and / or bright spots caused by the distance deviation between pixels that may occur during the process of transferring the panel in units of blocks.

[0189] According to an embodiment, dark spots and / or bright spots that may be generated at intersections formed by coupling four or more pixel blocks can be compensated for.

[0190] According to an embodiment, the image quality and visibility of the tiled display device can be improved, and deterioration of color reproducibility can be prevented.

[0191] According to an embodiment, the power consumption of the tiled display device can be reduced.

[0192] Since the content of the specification described in the above technical problems, technical solutions, and beneficial effects does not specify the basic features of the claims, the scope of the claims is not limited by the items described in the content of the specification.

[0193] Although embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not necessarily limited to the embodiments, and various modifications can be made without departing from the technical spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to describe it, and the scope of the technical spirit of the present invention is not limited by the embodiments. It should be understood that the above embodiments are illustrative in all respects and not restrictive. The scope of the present invention should be construed in accordance with the appended claims, and all technical spirits within the equivalent scope should be construed as being included within the scope of the present invention.

Claims

1. A tiled display device, comprising: A plurality of pixels disposed on a display panel; a first pixel region, the first pixel region including a first pixel and a second pixel adjacent to each other; as well as a second pixel region, the second pixel region including the first pixel and the third pixel adjacent to each other, wherein the brightness of the first color of the first pixel region is the same as the brightness of the first color of the second pixel region, and The sum of the brightness for each color of any one pixel selected from the group including the first pixel, the second pixel and the third pixel is greater than the sum of the brightness for each color of each of the two pixels whose distance is relatively smaller than the distance between the two selected pixels.

2. The tiled display device according to claim 1, further comprising: a first pixel block, the first pixel block including the first pixels, the first pixels being configured to emit light in a wavelength band of the first color; a second pixel block including the second pixels, the second pixels being disposed to be spaced apart from the first pixels in a first direction and configured to emit light in a wavelength band of the first color; as well as A third pixel block includes the third pixels, the third pixels are disposed to be spaced apart from the first pixels in a second direction intersecting the first direction and are configured to emit light in a wavelength band of the first color.

3. The tiled display device according to claim 2, wherein: The distance between adjacent first pixels and second pixels is greater than the distance between adjacent pixels in the first pixel block or the second pixel block, and The distance between adjacent first pixels and third pixels is greater than the distance between adjacent pixels in the first pixel block or the third pixel block.

4. The tiled display device according to claim 3, wherein: The first pixel includes a 1-1 sub-pixel and a 1-2 sub-pixel that emit light in the wavelength band of the first color, The second pixel includes a 2-1 sub-pixel and a 2-2 sub-pixel that emit light in the wavelength band of the first color, The third pixel includes a 3-1 sub-pixel and a 3-2 sub-pixel that emit light in the wavelength band of the first color, and The first color is any one of red, green and blue.

5. The tiled display device according to claim 4, wherein: The light amount ratio of the sub-pixel included in any one of the two selected pixels for the first color is different from the light amount ratio of the sub-pixel included in any one of the two pixels whose distance is relatively smaller than the distance between the two selected pixels.

6. A tiled display device, comprising: A plurality of pixels disposed on a display panel; a first pixel region, the first pixel region including a first pixel and a second pixel adjacent to each other; as well as a second pixel region, the second pixel region including the first pixel and the third pixel adjacent to each other, wherein the brightness of the first color of the first pixel region is the same as the brightness of the first color of the second pixel region, and The sum of the brightness for each color of any one pixel selected from the group including the first pixel, the second pixel and the third pixel is smaller than the sum of the brightness for each color of each of the two pixels whose distance is relatively greater than the distance between the two selected pixels.

7. The tiled display device according to claim 6, further comprising: a first pixel block, the first pixel block including the first pixels, the first pixels being configured to emit light in a wavelength band of the first color; a second pixel block including the second pixels, the second pixels being disposed to be spaced apart from the first pixels in a first direction and configured to emit light in a wavelength band of the first color; as well as A third pixel block includes the third pixels, the third pixels are disposed to be spaced apart from the first pixels in a second direction intersecting the first direction and are configured to emit light in a wavelength band of the first color.

8. The tiled display device according to claim 7, wherein: The distance between adjacent first pixels and second pixels is smaller than the distance between adjacent pixels in the first pixel block or the second pixel block, and The distance between adjacent first pixels and third pixels is smaller than the distance between adjacent pixels in the first pixel block or the third pixel block.

9. The tiled display device according to claim 8, wherein: The first pixel includes a 1-1 sub-pixel and a 1-2 sub-pixel that emit light in the wavelength band of the first color, The second pixel includes a 2-1 sub-pixel and a 2-2 sub-pixel that emit light in the wavelength band of the first color, The third pixel includes a 3-1 sub-pixel and a 3-2 sub-pixel that emit light in the wavelength band of the first color, and The first color is any one of red, green and blue.

10. The tiled display device according to claim 9, wherein: The light amount ratio of the sub-pixel included in any one of the two selected pixels for the first color is the same as the light amount ratio of the sub-pixel included in any one of the two pixels whose distance is relatively larger than the distance between the two selected pixels.

11. A tiled display device, comprising: a first pixel including a 1-1 sub-pixel and a 1-2 sub-pixel emitting the same light in a wavelength band of a first color; as well as a second pixel disposed to be spaced apart from the first pixel and including a 2-1 sub-pixel and a 2-2 sub-pixel emitting the same light in the wavelength band of the first color, The first pattern and the second pattern appear alternately in time. In the first pattern, the 1-1 sub-pixel and the 2-2 sub-pixel are turned on, and the 1-2 sub-pixel and the 2-1 sub-pixel are turned off. In the second pattern, the 1-1 sub-pixel and the 2-2 sub-pixel are turned off, and the 1-2 sub-pixel and the 2-1 sub-pixel are turned on.

12. The tiled display device according to claim 11, wherein: The 2-1 sub-pixel is disposed to be spaced apart from the 1-1 sub-pixel in the first direction, and the 2-2 sub-pixel is disposed to be spaced apart from the 1-2 sub-pixel in the first direction.

13. The tiled display device according to claim 11, further comprising: a first pixel block including the first pixel; as well as the second pixel block including the second pixel, the second pixel being arranged to be spaced apart from the first pixel in a first direction and adjacent to the first pixel, wherein the first pattern is a pattern in which the brightness of the first color of the first pixel is the same as the brightness of the first color of the second pixel, the light quantity ratio of the 1-1 sub-pixel to the 1-2 sub-pixel is 1:0, and the light quantity ratio of the 2-1 sub-pixel to the 2-2 sub-pixel is 0:1, and The second pattern is a pattern in which the brightness of the first color of the first pixel is the same as the brightness of the first color of the second pixel, the light amount ratio of the 1-1 sub-pixel to the 1-2 sub-pixel is 0:1, and the light amount ratio of the 2-1 sub-pixel to the 2-2 sub-pixel is 1:

0.

14. A tiled display device, comprising: a first pixel including a 1-1 sub-pixel and a 1-2 sub-pixel emitting light in a same color band; as well as a second pixel disposed to be spaced apart from the first pixel and including a 2-1 sub-pixel and a 2-2 sub-pixel emitting light in a wavelength band of the same color, wherein the brightness of the first color of the first pixel is the same as the brightness of the first color of the second pixel, and The 1-1 sub-pixel, the 1-2 sub-pixel, and the 2-1 sub-pixel are turned on, and the 2-2 sub-pixel is turned off.

15. The tiled display device according to claim 14, wherein: A light quantity ratio between the 1-1 sub-pixel and the 1-2 sub-pixel is in a range of 1:0.1 to 0.1:

1.

16. The tiled display device according to claim 14, further comprising: a first pixel block including the first pixel; as well as a second pixel block including the second pixel, the second pixel being arranged to be spaced apart from the first pixel in a first direction and adjacent to the first pixel, The light intensity ratio between the 2-1 sub-pixel and the 2-2 sub-pixel is 1:

0.

17. The tiled display device according to claim 16, wherein: An absolute value of a difference between a peak wavelength of the first color of any one of the 1-1 sub-pixel and the 1-2 sub-pixel and a peak wavelength of the first color of the 2-1 sub-pixel is greater than or equal to 0 nm and less than or equal to 5 nm. 18 . The tiled display device according to claim 17 , wherein the luminous intensity distribution of the first pixel for the first color is different from the luminous intensity distribution of the 1-1 sub-pixel for the first color or the luminous intensity distribution of the 1-2 sub-pixel for the first color.

19. A tiled display device, comprising: a first pixel including a 1-1 sub-pixel and a 1-2 sub-pixel emitting light in a same color band; as well as a second pixel disposed to be spaced apart from the first pixel and including a 2-1 sub-pixel and a 2-2 sub-pixel emitting light in a wavelength band of the same color, wherein the brightness of the first color of the first pixel is the same as the brightness of the first color of the second pixel, and The 1-1 sub-pixel, the 1-2 sub-pixel, the 2-1 sub-pixel, and the 2-2 sub-pixel are turned on.

20. The tiled display device according to claim 19, wherein: A light quantity ratio of the 1-1 sub-pixel to the 1-2 sub-pixel is in a range of 1:0.1 to 0.1:1, and a light quantity ratio of the 2-1 sub-pixel to the 2-2 sub-pixel is in a range of 1:0.1 to 0.1:

1.

21. The tiled display device according to claim 19, further comprising: a first pixel block including the first pixel; as well as A second pixel block includes the second pixel, the second pixel being disposed to be spaced apart from the first pixel in a first direction and adjacent to the first pixel.

22. The tiled display device according to claim 21, wherein: A light quantity ratio between the 1-1 sub-pixel and the 1-2 sub-pixel is the same as a light quantity ratio between the 2-1 sub-pixel and the 2-2 sub-pixel.

23. The tiled display device according to claim 22, wherein: The light amount of the 1-1 sub-pixel is the same as the light amount of the 1-2 sub-pixel.

Images