Modular display device and manufacturing method therefor

Abstract

This modular display device may comprise a plurality of display modules. The display modules may be arranged such that the difference between a first optical characteristic value and a second optical characteristic value of each of the display modules varies gradually (e.g. to equal to or less than a designated rate of change). The first optical characteristic value may be measured when each of the display modules displaying a reference image is viewed in a first direction. The second optical characteristic value may be measured when each of the display modules displaying the reference image is viewed in a second direction different from the first direction.

Description

Modular display device and method of manufacturing the same

[0001] The present disclosure relates to a modular display device and a method for manufacturing the same.

[0002] A modular display device may include a plurality of display modules that can be combined in various sizes and shapes. The plurality of display modules can be combined with each other to form a single integrated screen. Each of the plurality of display modules can operate independently of each other or display content together with other modules.

[0003] According to an exemplary embodiment, a modular display device may include a plurality of display modules, wherein the plurality of display modules may be arranged such that the difference between each of the first optical characteristic value and the second optical characteristic value of each of the plurality of display modules changes at a rate less than or equal to a specified rate of change. The first optical characteristic value may be measured when each of the plurality of display modules displaying a reference image is viewed in a first direction. The second optical characteristic value may be measured when each of the plurality of display modules displaying the reference image is viewed in a second direction different from the first direction.

[0004] In an exemplary embodiment, the angle between the first direction and the second direction may be 45 degrees or more and less than 90 degrees.

[0005] In an exemplary embodiment, the first direction may be perpendicular to the screen of each of the plurality of display modules displaying the reference image.

[0006] In an exemplary embodiment, the second direction may be tilted relative to the first direction and directed toward the screen of each of the plurality of display modules.

[0007] In an exemplary embodiment, the first optical characteristic value and the second optical characteristic value may include a chromaticity value.

[0008] In an exemplary embodiment, the first optical characteristic value and the second optical characteristic value may include a chromaticity value of white.

[0009] In an exemplary embodiment, the first optical characteristic value and the second optical characteristic value may include a green chromaticity value.

[0010] In an exemplary embodiment, the first optical characteristic value and the second optical characteristic value may include a luminance value.

[0011] In an exemplary embodiment, the plurality of display modules may include a first set of display modules arranged in order along a first specific direction. The first set of display modules may include first and second display modules located at both ends of the first specific direction; and a third display module located between the first and second display modules. The difference between the first optical characteristic value and the second optical characteristic value of the third display module may be greater than the difference between the first optical characteristic value and the second optical characteristic value of the first display module and smaller than the difference between the first optical characteristic value and the second optical characteristic value of the second display module.

[0012] In an exemplary embodiment, the plurality of display modules have a matrix array, and the first specific direction may be a diagonal direction of the matrix array.

[0013] In an exemplary embodiment, the plurality of display modules may include a fourth display module, a fifth display module, and a sixth display module that are arranged in order along a second specific direction and are adjacent to each other. The difference between the first optical characteristic value and the second optical characteristic value of the fifth display module may be greater than the difference between the first optical characteristic value and the second optical characteristic value of the fourth display module and the difference between the first optical characteristic value and the second optical characteristic value of the sixth display module.

[0014] In an exemplary embodiment, the first specific direction may be parallel to the second specific direction.

[0015] In an exemplary embodiment, the first specific direction may be different from the second specific direction. The fourth display module, the fifth display module, or the sixth display module may be included in the first set of display modules.

[0016] In an exemplary embodiment, the plurality of display modules may include a seventh display module, an eighth display module, and a ninth display module that are arranged in order along a third specific direction and are adjacent to each other. The difference between the first optical characteristic value and the second optical characteristic value of the eighth display module may be smaller than the difference between the first optical characteristic value and the second optical characteristic value of the seventh display module and the difference between the first optical characteristic value and the second optical characteristic value of the ninth display module.

[0017] A method for manufacturing a modular display device comprising a plurality of display modules according to an exemplary embodiment may include: measuring a first optical characteristic value for each of the plurality of display modules displaying a reference image in each first direction; measuring a second optical characteristic value for each of the plurality of display modules displaying the reference image in each second direction different from each first direction; determining an arrangement of the plurality of display modules such that the difference between each of the first optical characteristic value and the second optical characteristic value for each of the plurality of display modules changes at a rate of change less than or equal to a specified rate of change; and assembling the plurality of display modules in the determined arrangement.

[0018] In an exemplary embodiment, the first optical characteristic value may include a first chromaticity value of a specified color along the first axis of the color coordinate system. The second optical characteristic value may include a second chromaticity value of the specified color along the first axis of the color coordinate system.

[0019] In an exemplary embodiment, the first optical characteristic value may include a third chromaticity value of the designated color according to the second axis of the color coordinate system. The second optical characteristic value may include a fourth chromaticity value of the designated color according to the second axis of the color coordinate system. The manufacturing method may further include the steps of: determining an arrangement of the plurality of display modules such that a first difference between the first chromaticity value and the second chromaticity value for each of the plurality of display modules changes at a rate of change less than or equal to a designated rate of change; determining whether, within the determined arrangement, the deviation of the second difference between the third chromaticity value and the fourth chromaticity value between adjacent display modules exceeds a reference value; and assembling the plurality of display modules into the determined arrangement based on the fact that the deviation does not exceed the reference value.

[0020] In an exemplary embodiment, the manufacturing method may further include the step of assembling by replacing at least some of the display modules determined to exceed the reference value with other display modules when the deviation exceeds the reference value.

[0021] In an exemplary embodiment, each of the first directions may be perpendicular to the screen of each of the plurality of display modules displaying the reference image.

[0022] In an exemplary embodiment, each of the second directions may be inclined toward the screen of each of the plurality of display modules and may be tilted relative to each of the first directions.

[0023] The above and other aspects, features, and advantages of specific embodiments of the present disclosure will become more apparent from the following detailed description, which is taken into account together with the accompanying drawings.

[0024] FIG. 1 is a drawing showing the front view of a modular display device according to one embodiment.

[0025] FIG. 2 is a perspective view of a modular display device according to various embodiments.

[0026] FIG. 3 is a diagram showing the direction for measuring the optical characteristics of a display module according to various embodiments.

[0027] FIG. 4 is a flowchart illustrating an exemplary manufacturing method of a modular display device according to various embodiments.

[0028] FIG. 5 is a flowchart illustrating an exemplary manufacturing method of a modular display device according to various embodiments.

[0029] FIG. 6 is a perspective view showing an exemplary jig for measuring optical properties according to various embodiments.

[0030] FIGS. 7a, FIGS. 7b, and FIGS. 7c are drawings showing an exemplary jig for measuring optical properties according to one embodiment.

[0031] Hereinafter, various exemplary embodiments are described in more detail with reference to the attached drawings. The various exemplary embodiments described in this disclosure may be modified in various ways. Exemplary embodiments may be depicted in the drawings and described in detail in the detailed description. However, the exemplary embodiments disclosed in the attached drawings are merely intended to facilitate understanding of the various embodiments. Accordingly, the technical concept is not limited by the exemplary embodiments disclosed in the attached drawings, and it should be understood that it includes all equivalents or substitutions that fall within the spirit and technical scope of this disclosure.

[0032] In this disclosure, terms including ordinal numbers, such as "first," "second," etc., may be used to describe various components, but these components are not limited by the aforementioned terms. The aforementioned terms are used solely for the purpose of distinguishing one component from another.

[0033] In this disclosure, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this disclosure, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0034] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. When it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0035] In the present disclosure, the term “identical” (or “the same”) may include not only complete agreement but also variations within a processing tolerance range.

[0036] In describing the present disclosure, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the present disclosure, such detailed description may be abbreviated or omitted.

[0037] Identical or similar components in the drawings may be assigned the same reference numerals. Descriptions of components having the same reference numeral may be applied identically or in a corresponding manner when referring to different drawings, unless otherwise noted, and redundant descriptions of components having the same reference numeral may not be repeated. In the following descriptions referring to specific drawings, reference numerals from other drawings may be referenced.

[0038] Various exemplary embodiments of the present disclosure are described in detail below with reference to the attached drawings. However, one embodiment of the present disclosure may be implemented in various different forms and is not limited to the various embodiments of the present disclosure described herein.

[0039] FIG. 1 is a drawing showing the front view of a modular display device according to various embodiments. FIG. 2 is a perspective view of a modular display device according to various embodiments.

[0040] Referring to FIGS. 1 and 2, the modular display device (1) may include a plurality of display modules. Each of the plurality of display modules may be configured to operate independently. Additionally, the plurality of display modules may be configured to be integrated with one another to function as a larger single display. The modular display device (1) including such a plurality of display modules may be applied to display devices such as, for example, without limitation, a PC (personal computer) monitor, a TV, digital signage, an electronic display, etc.

[0041] Each of the above display modules may include a display panel having an inorganic light-emitting diode for image display. For example, the display panel may include a plurality of inorganic light-emitting diodes (e.g., micro LEDs) having a size of about 100 μm or less. The micro LED may be a semiconductor chip (e.g., micro LED chip) capable of emitting light on its own when power is supplied. For example, but not limited to, the micro LED may have a flip-chip structure in which an anode electrode and a cathode electrode are formed on the same surface, and a light-emitting surface is located on the opposite side of the surface where the anode electrode and the cathode electrode are formed. Each of the plurality of display modules of the modular display device (1) may be referred to as a display panel or a display device.

[0042] Each of the plurality of display modules of the modular display device (1) may include a substrate. The substrate may include a glass substrate, a substrate of a synthetic resin series having a flexible material (e.g., PI (polyimide), PET (polyethylene terephthalate), PES (polyether sulfone), PEN (polyethylene naphthalate), or PC (polycarbonate)), or a ceramic substrate.

[0043] The micro LED may be mounted on the substrate. Additionally, a thin film transistor (TFT) circuit for driving the micro LED (or pixels formed by the micro LED) may be formed on the substrate. Furthermore, a data driving driver, a gate driving driver, and a timing controller for controlling each driving driver may be disposed on the substrate. Alternatively, at least one of the data driving driver, the gate driving driver, and the timing controller may be formed on another substrate electrically connected to the substrate.

[0044] The plurality of display modules of the display device (1) may be arranged in a specified form. For example, the plurality of display modules of the display device (1) may include display modules (11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34, 41, 42, 43, and 44) ​​that form a 4x4 matrix array.

[0045] For example, display modules (11, 12, 13, and 14) can be arranged in order in a first direction (d1). The display modules (11, 12, 13, and 14) can define a first row of the matrix arrangement.

[0046] For example, display modules (21, 22, 23, and 24) may be arranged in order in a first direction (d1). The display modules (21, 22, 23, and 24) may define a second row of the matrix arrangement.

[0047] For example, the display modules (31, 32, 33, and 34) can be arranged in order in a first direction (d1). The display modules (31, 32, 33, and 34) can define a third row of the matrix arrangement.

[0048] For example, the display modules (41, 42, 43, and 44) ​​can be arranged in order in a first direction (d1). The display modules (41, 42, 43, and 44) ​​can define the fourth row of the matrix arrangement.

[0049] For example, display modules (41, 31, 21, and 11) may be arranged in order in a second direction (d2) perpendicular to a first direction (d1). The display modules (41, 31, 21, and 11) may define a first column of the matrix arrangement.

[0050] For example, the display modules (42, 32, 22, and 12) may be arranged in order in a second direction (d2). The display modules (42, 32, 22, and 12) may define a second column of the matrix arrangement.

[0051] For example, the display modules (43, 33, 23, and 13) may be arranged in order in a second direction (d2). The display modules (43, 33, 23, and 13) may define a third column of the matrix arrangement.

[0052] For example, the display modules (44, 34, 24, and 14) can be arranged in order in a second direction (d2). The display modules (44, 34, 24, and 14) can define a fourth column of the matrix arrangement.

[0053] For example, display modules (21 and 12) may be arranged in order in a third direction (d3). The third direction (d3) may be a diagonal direction of the matrix arrangement. For example, the third direction (d3) may be a direction between the first direction (d1) and the second direction (d2). For example, display modules (31, 22, and 11) may be arranged in order in a third direction (d3). For example, display modules (41, 32, 23, and 14) may be arranged in order in a third direction (d3). Display modules (41, 32, 23, and 14) may define the main diagonal of the matrix arrangement. For example, display modules (42, 33, and 24) may be arranged in order in a third direction (d3). For example, the display modules (43 and 34) can be arranged in order in a third direction (d3).

[0054] For example, but not limited to, display modules (11, 12, 13, 14, 21, 22, 23, 24, 31, 32, 33, 34, 41, 42, 43, and 44) ​​may have substantially the same shape and / or size.

[0055] The arrangement of the plurality of display modules of the modular display device (1) is not limited by the illustrated example. For example, the plurality of display modules of the modular display device (1) may have a matrix arrangement other than 4x4. For example, the modular display device (1) may include 81 display modules having a 9x9 matrix arrangement. As another example, the plurality of display modules of the modular display device (1) may have an irregular arrangement other than a matrix arrangement.

[0056] Since the characteristics of the LED and TFT substrate for each grayscale of the plurality of display modules of the modular display device (1) are different, after the assembly of the plurality of display modules, the optical characteristics (e.g., luminance of R, G, and B colors) of each of the display modules may be different. In this case, the modular display device (1) may not appear as a single display.

[0057] To solve this problem, images for each grayscale level can be captured from a specific direction (e.g., the front of the modular display device (1)) and then corrected so that all display modules output the same or substantially the same color. However, when the corrected modular display device (1) is observed from the said specific direction, it may appear as a single display, but when the modular display device (1) is observed from a direction different from the said specific direction (e.g., the side of the modular display device (1)), the images output by each of the plurality of display modules may not be uniform. For example, as shown in FIG. 2, the display modules (22 and 43) may have non-uniform optical characteristics compared to adjacent display modules. This may degrade the uniformity of the modular display device (1) and cause consumer dissatisfaction.

[0058] As such, the deviation in optical characteristics depending on the viewing angle may be due to the fact that the characteristics (e.g., light transmittance according to angle) of the film (e.g., AGLR (anti-glare low-reflection) film) included in each of the plurality of display modules are different from each other, and the LED luminous efficiency according to angle is different from each other.

[0059] To solve the above-mentioned problem, the plurality of display modules of the modular display device (1) may be arranged such that the difference (or difference value) between a first optical characteristic value and a second optical characteristic value of each of the plurality of display modules changes gradually (e.g., changes below a specified rate of change). For example, at least some of the plurality of display modules of the modular display device (1) may be arranged such that the difference between a first optical characteristic value and a second optical characteristic value of each of the display modules increases monotonically. For example, at least some of the plurality of display modules of the modular display device (1) may be arranged such that the difference between a first optical characteristic value and a second optical characteristic value of each of the display modules decreases monotonically. For example, some of the plurality of display modules of the modular display device (1) may be arranged such that the difference between the first optical characteristic value and the second optical characteristic value of each of the display modules increases monotonically, and the remaining portion may be arranged such that the difference between the first optical characteristic value and the second optical characteristic value of each of the display modules decreases monotonically. For example, the plurality of display modules of the modular display device (1) may be arranged such that the difference between the difference values ​​between adjacent display modules is minimized and / or reduced.

[0060] Each of the first optical characteristic value and the second optical characteristic value can be measured for each of the plurality of display modules of the modular display device (1). The first optical characteristic value can be measured when each of the plurality of display modules is viewed in a first direction (e.g., the first direction (D1) of FIG. 3), and the second optical characteristic value can be measured when each of the plurality of display modules is viewed in a second direction different from the first direction (e.g., the second direction (D2) of FIG. 3).

[0061] For example, referring to FIG. 1, the difference value (which may be abbreviated as "difference value") of the optical characteristic values ​​of each of the display modules (11, 12, 13, and 14) arranged in the first direction (d1) can be gradually changed. For example, the difference value of each of the display modules (11, 12, 13, and 14) can be gradually increased (or decreased) in the first direction (d1). For example, the difference value of each of the display modules (11, 12, 13, and 14) can be gradually increased (or decreased) in the first direction (d1) and then decreased (or increased).

[0062] For example, the difference value of each of the display modules (21, 22, 23, and 24) arranged in the first direction (d1) may change gradually. For example, the difference value of each of the display modules (21, 22, 23, and 24) may increase (or decrease) gradually in the first direction (d1). For example, the difference value of each of the display modules (21, 22, 23, and 24) may increase (or decrease) gradually in the first direction (d1) and then decrease (or increase).

[0063] For example, the difference value of each of the display modules (31, 32, 33, and 34) arranged in the first direction (d1) may change gradually. For example, the difference value of each of the display modules (31, 32, 33, and 34) may increase (or decrease) gradually in the first direction (d1). For example, the difference value of each of the display modules (31, 32, 33, and 34) may increase (or decrease) gradually in the first direction (d1) and then decrease (or increase).

[0064] For example, the difference value of each of the display modules (41, 42, 43, and 44) ​​arranged in the first direction (d1) may change gradually. For example, the difference value of each of the display modules (41, 42, 43, and 44) ​​may increase (or decrease) gradually in the first direction (d1). Also, in the first direction (d1), the difference value of the display module (13) located between the display modules (12 and 14) may be greater than the difference value of the display module (12) and smaller than the difference value of the display module (14).

[0065] For example, the difference value of each of the display modules (41, 42, 43, and 44) ​​may gradually increase (or decrease) in the first direction (d1) and then decrease (or increase).

[0066] For example, the difference value of each of the display modules (41, 31, 21, and 11) arranged in the second direction (d2) may change gradually. For example, the difference value of each of the display modules (41, 31, 21, and 11) may increase (or decrease) gradually in the second direction (d2). For example, the difference value of each of the display modules (41, 31, 21, and 11) may increase (or decrease) gradually in the second direction (d2) and then decrease (or increase).

[0067] For example, the difference value of each of the display modules (42, 32, 22, and 12) arranged in the second direction (d2) may change gradually. For example, the difference value of each of the display modules (42, 32, 22, and 12) may increase (or decrease) gradually in the second direction (d2). For example, the difference value of each of the display modules (42, 32, 22, and 12) may increase (or decrease) gradually in the second direction (d2) and then decrease (or increase).

[0068] For example, the difference value of each of the display modules (43, 33, 23, and 13) arranged in the second direction (d2) may change gradually. For example, the difference value of each of the display modules (43, 33, 23, and 13) may increase (or decrease) gradually in the second direction (d2). For example, the difference value of each of the display modules (43, 33, 23, and 13) may increase (or decrease) gradually in the second direction (d2) and then decrease (or increase).

[0069] For example, the difference value of each of the display modules (44, 34, 24, and 14) arranged in the second direction (d2) may change gradually. For example, the difference value of each of the display modules (44, 34, 24, and 14) may increase (or decrease) gradually in the second direction (d2). For example, the difference value of each of the display modules (44, 34, 24, and 14) may increase (or decrease) gradually in the second direction (d2) and then decrease (or increase).

[0070] For example, the difference value of each of the display modules (21 and 12) arranged in the third direction (d3) can be gradually changed. For example, the difference value of each of the display modules (21 and 12) can be gradually increased (or decreased) in the third direction (d3).

[0071] For example, the difference value of each of the display modules (31, 22, and 13) arranged in the third direction (d3) may change gradually. For example, the difference value of each of the display modules (31, 22, and 13) may increase (or decrease) gradually in the third direction (d3). For example, the difference value of each of the display modules (31, 22, and 13) may increase (or decrease) gradually in the third direction (d3) and then decrease (or increase).

[0072] For example, the difference value of each of the display modules (41, 32, 23, and 14) arranged in the third direction (d3) may change gradually. For example, the difference value of each of the display modules (41, 32, 23, and 14) may increase (or decrease) gradually in the third direction (d3). For example, the difference value of each of the display modules (41, 32, 23, and 14) may increase (or decrease) gradually in the third direction (d3) and then decrease (or increase).

[0073] For example, the difference value of each of the display modules (42, 33, and 24) arranged in the third direction (d3) may change gradually. For example, the difference value of each of the display modules (42, 33, and 24) may increase (or decrease) gradually in the third direction (d3). For example, the difference value of each of the display modules (42, 33, and 24) may increase (or decrease) gradually in the third direction (d3) and then decrease (or increase).

[0074] For example, the difference value of each of the display modules (43 and 34) arranged in the third direction (d3) can be gradually changed. For example, the difference value of each of the display modules (43 and 34) can be gradually increased (or decreased) in the third direction (d3).

[0075] FIG. 3 is a diagram showing the direction for measuring the optical characteristics of a display module according to various embodiments.

[0076] FIG. 3 illustrates a display module (10) having a front surface (10A) on which a screen is displayed. The description of the display module (10) can be applied substantially the same way to each of the plurality of display modules of the modular display device (1).

[0077] Referring to FIG. 3, the first optical characteristic can be measured when the display module (10) (or front (10A)) displaying the reference image is viewed in the first direction (D1).

[0078] The above second optical characteristic can be measured when the display module (10) (or front (10A)) displaying the reference image is viewed in a second direction (D2) different from the first direction (D1).

[0079] For example, the angle between the first direction (D1) and the second direction (D2) may be greater than about 45 degrees and less than about 90 degrees. For example, the first direction (D1) may be perpendicular to the display module (10) (or the front (10A)). For example, the normal direction (n) of the front (10A) and the first direction (D1) may be parallel to each other.

[0080] The second direction (D2) may face the front (10A) and be oblique to the normal direction (n). For example, the angle between the second direction (D2) and the normal direction (n) may be about 45 degrees or more and less than 90 degrees.

[0081] For example, the first optical characteristic value and the second optical characteristic value may include chromaticity values. For example, the first optical characteristic value and the second optical characteristic value may include a chromaticity value of white. In this case, the reference image displayed by the display module (10) may be a white screen with a specified luminance (e.g., about 250 nit). For example, each of the first optical characteristic value and the second optical characteristic value may include a chromaticity value of white along the first axis (e.g., x-axis) of the color coordinate system and / or a chromaticity value of white along the second axis (e.g., y-axis) of the color coordinate system. The color coordinate system may include, for example, the CIE (commission internationale de l'Eclairage) 1931 color coordinate system, but is not limited to.

[0082] The first optical characteristic value and the second optical characteristic value may include a green chromaticity value. For example, each of the first optical characteristic value and the second optical characteristic value may include a green chromaticity value along the first axis (e.g., x-axis) of the color coordinate system and / or a green chromaticity value along the second axis (e.g., y-axis) of the color coordinate system.

[0083] The first optical characteristic value and the second optical characteristic value may include a luminance value.

[0084] In a comparative example, the arrangement of display modules of a modular display device (1) can be determined using only one of the first optical characteristic value and the second optical characteristic value. When display modules are assembled in such an arrangement, the optical characteristics of each display module may vary depending on conditions (e.g., temperature, voltage, etc.), and accordingly, the uniformity of the modular display device (1) may be compromised.

[0085] Since the difference value between the first optical characteristic value and the second optical characteristic value is an inherent characteristic of the LED and the film, it may not be affected by external factors such as temperature and voltage. Therefore, the modular display device (1) assembled in an arrangement determined based on the difference value can maintain uniformity even after assembly. The modular display device (1) assembled in an arrangement determined based on the difference value can maintain uniformity even when viewed from different directions (e.g., front and side).

[0086] FIG. 4 is a flowchart illustrating an exemplary manufacturing method of a modular display device according to various embodiments.

[0087] Referring to FIG. 4, in step (410), the first optical characteristic value of each of the display modules can be measured in a first direction. For example, referring to FIG. 3, the first optical characteristic value of the display module (10) displaying the reference image can be measured in a first direction (D1).

[0088] In step (420), the second optical characteristic value of each of the display modules may be measured in a second direction different from the first direction. For example, referring to FIG. 3, the second optical characteristic value of the display module (10) displaying the reference image may be measured in a second direction (D2). Although step (420) is depicted as being performed after step (410), unlike the depiction, step (420) may be performed substantially simultaneously with step (410) or before step (410).

[0089] In step (430), the arrangement of the display modules can be determined using the difference value between the first optical characteristic value and the second optical characteristic value of each of the display modules. For example, the arrangement of the plurality of display modules can be determined such that the difference value between the first optical characteristic value and the second optical characteristic value for each of the plurality of display modules of the modular display device (1) gradually changes.

[0090] In step (440), display modules can be assembled in a determined arrangement. For example, the display modules can be assembled to have the arrangement determined in step (430).

[0091] FIG. 5 is a flowchart illustrating an exemplary manufacturing method of a modular display device according to various embodiments.

[0092] Referring to FIG. 5, in step (510), a first optical characteristic value of each of the display modules can be measured in a first direction. In step (510), the first optical characteristic value may include a first chromaticity value along a first axis (e.g., y-axis) of a color coordinate system and a second chromaticity value along a second axis (e.g., x-axis). For example, referring to FIG. 3, the first chromaticity value and the second chromaticity value of the display module (10) displaying the reference image can be measured in a first direction (D1).

[0093] In step (520), the second optical characteristic value of each of the display modules may be measured in a second direction different from the first direction. In step (520), the second optical characteristic value may include a third chromaticity value along the first axis (e.g., y-axis) of the color coordinate system and a fourth chromaticity value along the second axis (e.g., x-axis) of the color coordinate system. For example, referring to FIG. 3, the third chromaticity value and the fourth chromaticity value of the display module (10) displaying the reference image may be measured in the second direction (D2). Although step (520) is depicted as being performed after step (510), step (520) may be performed substantially simultaneously with step (510) or before step (510).

[0094] In step (530), the arrangement of the display modules can be determined using a first difference value between a first chromaticity value and a third chromaticity value for each of the display modules. For example, the arrangement of the plurality of display modules can be determined such that the difference value between the first chromaticity value and the third chromaticity value for each of the plurality of display modules of the modular display device (1) gradually changes.

[0095] In step (540), it can be determined whether the deviation of the second difference value between the second chromaticity value and the fourth chromaticity value between adjacent display modules within the determined array exceeds a reference value. For example, referring to FIG. 1, it can be determined whether the deviation of the second difference value of the display module (11) and the second difference value of the display module (12) adjacent to the display module (11) exceeds a reference value. In step (540), if it is determined that the deviation of the second difference value does not exceed the reference value (step (540): No), step (550) may be performed, and if not (step (540): Yes), step (560) may be performed.

[0096] In step (550), display modules can be assembled in a determined arrangement. For example, the display modules can be assembled to have the arrangement determined in step (530).

[0097] In step (560), the display modules can be assembled by replacing at least some of the display modules so that the deviation does not exceed a reference value. For example, if it is determined in step (540) that the deviation between the second difference value of the display module (11) and the second difference value of the display module (12) adjacent to the display module (11) exceeds a reference value, in step (560), the display modules can be assembled after replacing the display module (11) and / or the display module (12) with other display modules so that the reference value does not exceed a reference value.

[0098] FIG. 6 is a perspective view showing an exemplary jig for measuring optical properties according to various embodiments. In FIG. 6, a jig (60) is shown that is used to measure the second optical properties in the second direction (D2) described above.

[0099] Referring to FIG. 6, the jig (60) may include a base (61) and a bracket (62) attached to the base (61). A tube (63) may be formed in the bracket (62). The base (61) may be attached to the front (10A) of the display module (10). A measuring device, although not shown, may be attached to the bracket (62) of the jig (60) so as to receive light through the tube (63). With the base (61) attached to the display module (10), the measuring device attached to the bracket (62) may look toward the front (10A) of the display module (10) in a second direction (D2) through the tube (63). Light emitted from the display module (10) may be transmitted to the measuring device through the tube (63). Accordingly, the measuring device can measure the second optical characteristic according to the second direction (D2). The measuring device may include a chromaticity meter or a luminance meter capable of measuring chromaticity (e.g., when the second optical characteristic includes a chromaticity value).

[0100] FIGS. 7a, 7b, and 7c are drawings illustrating exemplary jigs for measuring optical properties according to various embodiments. In FIGS. 7a, 7b, and 7c, a jig (70) used for measuring the first optical property in the first direction (D1) and the second optical property in the second direction (D2), as described above, is illustrated.

[0101] Referring to FIGS. 7a, 7b, and 7c, the jig (70) may include a base (71) and a bracket (72) attached to the base (71). A measuring device (75) may be attached to the bracket (72).

[0102] For example, the bracket (72) can be fixed to the base (71) through a fastening member such as a screw. When the fastening member is released, the bracket (72) can move along guide rails (74) formed on the base (71). Accordingly, the bracket (72) and the measuring device (75) attached to the bracket (72) can be arranged at various angles relative to the base (71).

[0103] A base (71) can be attached to the front (10A) of a display module (10). For example, referring to FIG. 7a, with the base (71) attached to the display module (10), a bracket (72) can be arranged at a first angle relative to the base (71), and a measuring device (75) attached to the bracket (72) can look toward the front (10A) of the display module (10) in a second direction (D2). Accordingly, the second optical characteristic can be measured according to the second direction (D2).

[0104] Referring to FIG. 7b, with the base (71) attached to the display module (10), the bracket (72) can be arranged at a second angle different from the first angle with respect to the base (71), and the measuring device (75) attached to the bracket (72) can look at the front (10A) of the display module (10) in the first direction (D1). Accordingly, the first optical characteristic according to the first direction (D1) can be measured.

[0105] The measuring device (75) may include a colorimeter or a luminance meter capable of measuring color (e.g., when the first optical characteristic and the second optical characteristic include a color value).

[0106] Various embodiments of the present disclosure are described below.

[0107] According to an exemplary first embodiment, a modular display device (1) may include a plurality of display modules. The plurality of display modules may be arranged such that the difference between a first optical characteristic value and a second optical characteristic value of each of the plurality of display modules gradually changes. The first optical characteristic value may be measured when each of the plurality of display modules displaying a reference image is viewed in a first direction (D1). The second optical characteristic value may be measured when each of the plurality of display modules displaying the reference image is viewed in a second direction (D2) different from the first direction (D1).

[0108] In an exemplary second embodiment, the angle between the first direction (D1) and the second direction (D2) according to the first embodiment may be 45 degrees or more and less than 90 degrees.

[0109] In an exemplary third embodiment, according to the first embodiment or the second embodiment, the first direction (D1) may be perpendicular to the screen (10A) of each of the plurality of display modules displaying the reference image.

[0110] In an exemplary fourth embodiment, according to the third embodiment, the second direction (D2) may be tilted toward the screen (10A) of each of the plurality of display modules and with respect to the first direction (D1).

[0111] In an exemplary fifth embodiment, according to any one of the first to fourth embodiments, the first optical characteristic value and the second optical characteristic value may include a chromaticity value.

[0112] In an exemplary sixth embodiment, the first optical characteristic value and the second optical characteristic value according to the fifth embodiment may include a chromaticity value of white.

[0113] In an exemplary seventh embodiment, the first optical characteristic value and the second optical characteristic value according to the fifth embodiment or the sixth embodiment may include a green chromaticity value.

[0114] In an exemplary eighth embodiment, according to any one of the first to seventh embodiments, the first optical characteristic value and the second optical characteristic value may include a luminance value.

[0115] In an exemplary ninth embodiment, the plurality of display modules according to any one of the first to eighth embodiments may include a first set of display modules arranged in order in a first specific direction. The first set of display modules may include first and second display modules located at both ends of the first specific direction; and a third display module located between the first and second display modules. The difference value of the third display module may be greater than the difference value of the first display module and smaller than the difference value of the second display module.

[0116] For example, the first set of display modules may include display modules (11; 12; 13; 14) arranged in order along a first direction (d1), the first display module may be a display module (11), the second display module may be a display module (14), and the third display module may be a display module (12 and / or 13).

[0117] For example, the first set of display modules may include display modules (41; 31; 21; 11) arranged in order along a second direction (d2), the first display module may be a display module (41), the second display module may be a display module (11), and the third display module may be a display module (31 and / or 21).

[0118] For example, the first set of display modules may include display modules (41; 32; 23; 14) arranged in order along a third direction (d3), the first display module may be a display module (41), the second display module may be a display module (14), and the third display module may be a display module (32 and / or 23).

[0119] In an exemplary tenth embodiment, the plurality of display modules according to the ninth embodiment have a matrix array, and the first specific direction may be a diagonal direction of the matrix array. For example, the first specific direction may be a third direction (d3).

[0120] In an exemplary eleventh embodiment, according to any one of the first to tenth embodiments, the plurality of display modules may include a fourth display module, a fifth display module, and a sixth display module that are arranged in order along a second specific direction and are adjacent to each other. The difference value of the fifth display module may be greater than the difference value of the fourth display module and the difference value of the sixth display module.

[0121] In the exemplary 12th embodiment, the first specific direction according to the 11th embodiment may be parallel to the second specific direction. For example, the first set of display modules may include display modules (11; 12; 13; 14) arranged in order along the first direction (d1), and in this case, the fourth display module, the fifth display module, and the sixth display module may be display modules (21, 22, 23; 22, 23, 24; 31, 32, 33; 32, 33, 34; 41, 42, 43; 42, 43, 44) arranged in order along the first direction (d1).

[0122] For example, the first set of display modules may include display modules (41; 31; 21; 11) arranged in order along the second direction (d2), and in this case, the fourth display module, the fifth display module, and the sixth display module may include display modules (42, 32, 22; 32, 22, 12; 43, 33, 23; 33, 23, 13; 44, 34, 24; 34, 24, 14) arranged in order along the second direction (d2).

[0123] For example, the first set of display modules may include display modules (41; 32; 23; 14) arranged in order along a third direction (d3), and in this case, the fourth display module, the fifth display module, and the sixth display module may include display modules (31, 22, 13; 42, 33, 24).

[0124] In the exemplary 13th embodiment, the first specific direction according to the 11th embodiment may be different from the second specific direction. The fourth display module, the fifth display module, or the sixth display module may be included in the first set of display modules. For example, if the first specific direction is the first direction (d1), the second specific direction may be the second direction (d2) or the third direction (d3). For another example, if the first specific direction is the second direction (d2), the second specific direction may be the first direction (d1) or the third direction (d3). For another example, if the first specific direction is the third direction (d3), the second specific direction may be the first direction (d1) or the second direction (d2).

[0125] For example, if the first specific direction is the first direction (d1) and the second specific direction is the second direction (d2), the first set of display modules may include display modules (11, 12, 13), and each of the fourth display module, the fifth display module, and the sixth display module may be display modules (32, 22, 12).

[0126] For example, if the first specific direction is the first direction (d1) and the second specific direction is the third direction (d3), the first set of display modules may include display modules (11, 12, 13), and each of the fourth display module, the fifth display module, and the sixth display module may be display modules (31, 22, 13).

[0127] For example, if the first specific direction is the second direction (d2) and the second specific direction is the first direction (d1), the first set of display modules may include display modules (32, 22, 12), and each of the fourth display module, the fifth display module, and the sixth display module may be display modules (11, 12, 13).

[0128] For example, if the first specific direction is the second direction (d2) and the second specific direction is the third direction (d3), the first set of display modules may include display modules (32, 22, 12), and each of the fourth display module, the fifth display module, and the sixth display module may be display modules (31, 22, 13).

[0129] For example, if the first specific direction is the third direction (d3) and the second specific direction is the first direction (d1), the first set of display modules may include display modules (41, 32, 23, 14), and each of the fourth display module, the fifth display module, and the sixth display module may be display modules (31, 32, 33).

[0130] For example, if the first specific direction is the third direction (d3) and the second specific direction is the second direction (d2), the first set of display modules may include display modules (41, 32, 23, 14), and each of the fourth display module, the fifth display module, and the sixth display module may be display modules (42, 32, 22).

[0131] In an exemplary 14th embodiment, the plurality of display modules according to any one of the 1st to 13th embodiments may include a 7th display module, an 8th display module, and a 9th display module that are arranged in order along a third specific direction and are adjacent to each other. The difference value of the 8th display module may be smaller than the difference value of the 7th display module and the difference value of the 9th display module. For example, the third specific direction may be a 1st direction (d1), a 2nd direction (d2), or a 3rd direction (d3).

[0132] A method for manufacturing a modular display device (1) comprising a plurality of display modules according to an exemplary 15th embodiment may include: a step (410; 510) of measuring a first optical characteristic value for each of the plurality of display modules displaying a reference image in a first direction (D1); a step (420; 520) of measuring a second optical characteristic value for each of the plurality of display modules displaying the reference image in a second direction (D2) different from the first direction (D1); a step (430; 530) of determining an arrangement of the plurality of display modules such that the difference value between the first optical characteristic value and the second optical characteristic value for each of the plurality of display modules gradually changes; and a step (440; 550) of assembling the plurality of display modules in the determined arrangement.

[0133] In an exemplary 16th embodiment, the first optical characteristic value according to the 15th embodiment may include a first chromaticity value of a specified color along the first axis of the color coordinate system. The second optical characteristic value may include a second chromaticity value of the specified color along the first axis of the color coordinate system.

[0134] In an exemplary 17th embodiment, the first optical characteristic value according to the 16th embodiment may include a third chromaticity value of the designated color according to the second axis of the color coordinate system. The second optical characteristic value may include a fourth chromaticity value of the designated color according to the second axis of the color coordinate system. The manufacturing method may further include the step (530) of determining an arrangement of the plurality of display modules such that a first difference value between the first chromaticity value and the second chromaticity value for each of the plurality of display modules gradually changes; the step (540) of determining whether the deviation of the second difference value between the third chromaticity value and the fourth chromaticity value between adjacent display modules within the determined arrangement exceeds a reference value; and the step (550) of assembling the plurality of display modules in the determined arrangement if the deviation does not exceed the reference value.

[0135] In the exemplary 18th embodiment, the manufacturing method according to the 17th embodiment may further include the step (560) of replacing at least some of the display modules determined to exceed the reference value with other display modules when the deviation exceeds the reference value.

[0136] In the exemplary 19th embodiment, according to any one of the 15th to 18th embodiments, the first direction (D1) may be perpendicular to the screen (10A) of each of the plurality of display modules displaying the reference image.

[0137] In an exemplary 20th embodiment, according to any one of the 15th to 19th examples, the second direction (D2) may be directed toward the screen (10A) of each of the plurality of display modules and may be tilted relative to the first direction (D1).

[0138] Although the present disclosure has been illustrated and described above with reference to various exemplary embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the present disclosure, including the appended claims and their equivalents. It will also be understood that any embodiment(s) described herein may be used in combination with any other embodiment(s) described herein.

Claims

1. In a modular display device, It includes multiple display modules, The above display modules are arranged such that the difference between each of the first optical characteristic value and the second optical characteristic value of each of the above display modules changes at a rate of change less than or equal to a specified rate of change, and The above first optical characteristic value is measured when each of the display modules displaying a reference image is viewed in a first direction, and The above second optical characteristic value is measured when each of the display modules displaying the reference image is viewed in a second direction different from the first direction. Modular display device.

2. In Claim 1, The angle between the first direction and the second direction is 45 degrees or more and less than 90 degrees. Modular display device.

3. In Claim 1, The first direction is perpendicular to the screen of each of the display modules displaying the reference image. Modular display device.

4. In Claim 3, The second direction is oriented toward the screen of each of the display modules and is tilted with respect to the first direction. Modular display device.

5. In Claim 1, The first optical characteristic value and the second optical characteristic value include a chromaticity value. Modular display device.

6. In Claim 5, The first optical characteristic value and the second optical characteristic value include a chromaticity value of white. Modular display device.

7. In Claim 5, The first optical characteristic value and the second optical characteristic value include a green chromaticity value. Modular display device.

8. In Claim 1, The first optical characteristic value and the second optical characteristic value include a luminance value. Modular display device.

9. In Claim 1, The above display modules include a first set of display modules arranged in order along a first specific direction, and The first set of display modules above are: First and second display modules located at both ends of the first specific direction; and It includes a third display module located between the first and second display modules, and The difference between the first optical characteristic value and the second optical characteristic value of the third display module is greater than the difference between the first optical characteristic value and the second optical characteristic value of the first display module and smaller than the difference between the first optical characteristic value and the second optical characteristic value of the second display module. Modular display device.

10. In Claim 9, The above display modules have a matrix array, The first specific direction mentioned above is the diagonal direction of the matrix array, Modular display device.

11. In Claim 10, The above display modules include fourth, fifth, and sixth display modules that are arranged in order along a second specific direction and are adjacent to each other, and The difference between the first optical characteristic value and the second optical characteristic value of the fifth display module is greater than the difference between the first optical characteristic value and the second optical characteristic value of the fourth display module and the difference between the first optical characteristic value and the second optical characteristic value of the sixth display module. Modular display device.

12. In Claim 11, The first specific direction is parallel to the second specific direction. Modular display device.

13. In Claim 11, The above-mentioned first specific direction is different from the above-mentioned second specific direction, and The above-mentioned fourth display module, the above-mentioned fifth display module, or the above-mentioned sixth display module is included in the above-mentioned first set of display modules, Modular display device.

14. In Claim 1, The above display modules include seventh, eighth, and ninth display modules that are arranged in order along a third specific direction and are adjacent to each other, and The difference between the first optical characteristic value and the second optical characteristic value of the eighth display module is smaller than the difference between the first optical characteristic value and the second optical characteristic value of the seventh display module and the difference between the first optical characteristic value and the second optical characteristic value of the ninth display module. Modular display device.

15. A method for manufacturing a modular display device comprising a plurality of display modules, A step of measuring a first optical characteristic value for each of the display modules displaying a reference image in a first direction; A step of measuring a second optical characteristic value for each of the display modules displaying the reference image in a second direction different from the first direction; A step of determining the arrangement of the display modules such that the difference between the first optical characteristic value and the second optical characteristic value for each of the display modules changes at a rate of change less than or equal to a specified rate of change; and A step comprising assembling the display modules based on the above-determined arrangement, Manufacturing method.

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