Display device using light-emitting element

Abstract

The invention provides a display device using a light emitting device, which is suitable for the technical field related to the display device. In a display device implemented by combining a plurality of unit display modules in which a plurality of unit pixel regions are defined, the plurality of unit display modules are combined with each other through interfaces therebetween. Each unit display module includes: an electrode pad arranged in a unit pixel to define a plurality of unit sub-pixels; and a light emitting element electrically connected to the electrode pad. A shortest distance between adjacent pixels including the interface may be greater than a shortest distance between adjacent pixels in the display module.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of Korean Patent Application No. 10-2023-0110433, filed on August 23, 2023, which is incorporated herein by reference as if fully set forth herein. Technical Field

[0002] The present disclosure is applicable to a technical field related to a display device, and relates to, for example, a display device using a light emitting device. Background Art

[0003] Recently, in the field of display technology, display devices having excellent characteristics such as thinness, flexibility, etc. have been developed. On the other hand, currently commercialized main displays are represented by liquid crystal displays (LCDs) and organic light emitting diodes (OLEDs).

[0004] On the other hand, a light emitting diode (LED) is a well-known semiconductor light emitting element that converts electric current into light, and since the commercialization of red LEDs using GaAsP compound semiconductors in 1962, light emitting diodes have been used as light sources for displaying images in electronic devices including information and communication devices, together with GaP:N-based green LEDs.

[0005] Recently, such light emitting diodes (LEDs) have been gradually miniaturized and manufactured into micro LEDs to be used as pixels of display devices.

[0006] When a single large-area display device is implemented, the cost of raw materials is relatively high, and there are limitations in process equipment and technology. Therefore, modular display devices that implement a large-area display device by combining several small-sized display modules are being used.

[0007] Such modular display devices may have various advantages. For example, large-area display devices of various sizes may be realized according to the combination of modules. It may be technically easier to manufacture a single unit display device than to manufacture a single large-area display device. If a problem occurs in a part of the display device, repair and replacement may be easy.

[0008] However, when a display device is realized by connecting a plurality of unit display devices to each other, problems may occur when operating the unit display devices like a single large-area display device. For example, assembly tolerances may occur. In addition, optical loss may occur at the interface between modules. Depending on the viewing angle, the optical loss that may occur at the interface may cause color changes.

[0009] Therefore, solutions to these problems are needed. Summary of the invention

[0010] An embodiment of the present disclosure provides a display device capable of smoothly realizing colors in a modular display device that realizes a single display device by connecting a plurality of unit display devices to each other.

[0011] Embodiments of the present disclosure provide a display device capable of preventing or mitigating unintended optical phenomena at interfaces between modules in a modular display device.

[0012] Embodiments of the present disclosure provide a display device capable of preventing or mitigating optical loss that may occur at an interface between modules in a modular display device.

[0013] According to one aspect of the present disclosure, there is provided a display device implemented by combining a plurality of unit display modules, in which a plurality of unit pixel regions are defined. The plurality of unit display modules are combined with each other through interfaces therebetween, and each unit display module includes: an electrode pad arranged in a unit pixel to define a plurality of unit sub-pixels; and a light-emitting element electrically connected to the electrode pad. The shortest distance between adjacent pixels including the interface may be greater than the shortest distance between adjacent pixels in the display module.

[0014] In an exemplary embodiment, a distance between the interface and the adjacent sub-pixel may be greater than a shortest distance between adjacent sub-pixels in the display module.

[0015] In an exemplary embodiment, a distance between the interface and the adjacent sub-pixel may be greater than half of the shortest distance between adjacent pixels in the display module.

[0016] In an exemplary embodiment, a pixel pitch including the interface may be equal to or less than 1.1 times a pixel pitch in the display module.

[0017] In an exemplary embodiment, a pixel pitch including the interface may be 1.05 to 1.1 times a pixel pitch in a display module.

[0018] In certain example embodiments, an unintended air layer may be located in the interface.

[0019] According to another aspect of the present disclosure, a display device implemented by combining a first display module and a second display module is provided, wherein a plurality of unit pixel areas are defined in the first display module and the second display module, and an interface is provided between the first display module and the second display module. At least one of the first display module or the second display module includes: an electrode pad arranged in a unit pixel to define a plurality of unit sub-pixels; and a light-emitting element electrically connected to the electrode pad. The distance between the interface and the adjacent sub-pixel may be greater than the shortest distance between adjacent sub-pixels in the first display module or the second display module, or may be greater than half of the shortest distance between adjacent pixels in the first display module or the second display module.

[0020] In an exemplary embodiment, a shortest distance between adjacent pixels including the interface may be greater than a shortest distance between adjacent pixels in the first display module or the second display module.

[0021] In an exemplary embodiment, a pixel pitch including the interface may be equal to or less than 1.1 times a pixel pitch in the first display module or the second display module.

[0022] In an exemplary embodiment, a pixel pitch including the interface may be 1.05 to 1.1 times a pixel pitch in the first display module or the second display module.

[0023] In certain example embodiments, an unintended air layer may be located in the interface.

[0024] In an exemplary embodiment, at least one of the first display module or the second display module may further include: a cover layer on the light emitting element; and an optical film on the cover layer.

[0025] According to the exemplary embodiments of the present disclosure, the following effects can be obtained.

[0026] Colors are smoothly realized in a modular display device that realizes a single display device by connecting a plurality of unit display devices to each other.

[0027] Additionally, unintended optical phenomena at interfaces between modules in a modular display device are prevented or mitigated.

[0028] Additionally, optical losses that may occur at interfaces between modules in a modular display device are prevented or mitigated.

[0029] In addition, even if the observer observes the display module upward or downward at an inclined angle, light from the light emitting element located at the outermost portion of the module may not be lacking, so that fading does not occur, and white light may be normally realized.

[0030] The effects that can be achieved by the present disclosure are not limited to the effects specifically described above, and those skilled in the art will more clearly understand other advantages not described herein from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application. The accompanying drawings illustrate one or more embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. In the drawings:

[0032] Figure 1 is a schematic diagram of a display device using a semiconductor light emitting element according to an embodiment of the present disclosure;

[0033] Figure 2 is a conceptual diagram showing an implementation example of a display device using a semiconductor light emitting element according to an embodiment of the present disclosure;

[0034] Figure 3 is a plan view showing an implementation example of a display device using a semiconductor light emitting element according to an embodiment of the present disclosure;

[0035] Figure 4 is a conceptual diagram showing a color implementation example of a modular display device in an ideal situation or when an embodiment of the present disclosure is applied;

[0036] Figure 5 is a conceptual diagram showing a phenomenon occurring at an interface of a modular display device as a comparative example; and

[0037] Figures 6 to 8 is a conceptual diagram illustrating a light emission form according to a distance between an interface and an adjacent sub-pixel in a modular display device. DETAILED DESCRIPTION

[0038] Reference will now be made in detail to embodiments of the present disclosure, examples of which are shown in the accompanying drawings. Where possible, the same reference numerals will be used throughout the accompanying drawings to refer to the same or similar parts, and redundant descriptions thereof will be omitted. As used herein, the suffixes "module" and "unit" are added or used interchangeably to facilitate the preparation of this specification, and are not intended to imply different meanings or functions. When describing the embodiments disclosed in this specification, the relevant known technologies may not be described in detail so as not to obscure the subject matter of the embodiments disclosed in this specification. In addition, it should be noted that the drawings are only used to easily understand the embodiments disclosed in this specification, and therefore should not be interpreted as limiting the technical spirit disclosed in this specification.

[0039] Furthermore, although the drawings are described individually for simplicity, embodiments implemented by combining at least two or more drawings are also within the scope of the present disclosure.

[0040] In addition, when an element such as a layer, a region or a module is described as being “on” another element, it should be understood that the element can be directly on the other element or intervening elements may be present therebetween.

[0041] The display device described herein is a concept including all display devices that display information using unit pixels or grouped unit pixels. Therefore, the display device can be applied not only to finished products but also to components. For example, a panel corresponding to a part of a digital TV also independently corresponds to the display device in this specification. Finished products include mobile phones, smart phones, laptop computers, digital broadcast terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation systems, tablet PCs, tablet computers, ultrabooks, digital TVs, desktop computers, etc.

[0042] However, it is obvious to those skilled in the art that the configuration according to the embodiments described herein is applicable even to new products to be developed later as display devices.

[0043] In addition, the semiconductor light emitting element mentioned in this specification is a concept including LED, micro LED, etc., and can be used interchangeably with LED, micro LED, etc.

[0044] Figure 1 is a schematic diagram of a display device using a semiconductor light emitting element according to an embodiment of the present disclosure.

[0045] refer to Figure 1 The display device 10 has a separately divided unit pixel region 101 on a wiring substrate 100, and light emitting elements 200 (210, 220 and 230) are respectively installed in a plurality of sub-pixel regions 102, 103 and 104 positioned in the unit pixel region 101.

[0046] Here, each of the light emitting elements 210, 220, and 230 installed in each unit pixel region 101 may substantially correspond to a sub-pixel. For example, three sub-pixels may constitute one pixel. Figure 1 In the figure, the three light emitting elements 210, 220 and 230 may correspond to a red light emitting element, a green light emitting element and a blue light emitting element, respectively.

[0047] The light emitting elements 210, 220, and 230 may be electrically connected to the pair of electrode pads 130 and 140, the pair of electrode pads 131 and 141, and the pair of electrode pads 132 and 142, respectively. Figure 1 The electrode pads 130, 131, and 132 (hereinafter referred to as first electrode pads) arranged in one direction are connected to the first wiring electrodes 121, 122, and 123 (signal electrodes or data electrodes), respectively.

[0048] The electrode pads 140, 141, and 142 (hereinafter referred to as second electrode pads) arranged in another direction may be connected to the second wiring electrode 124 (common electrode or scan electrode). However, the opposite is also possible. Figure 1 , the signal electrodes 121, 122, and 123 and the common electrode 124 are omitted in the arrangement of electrodes and pads.

[0049] In some cases, first electrode pads 130 , 131 , and 132 may correspond to signal electrodes 121 , 122 , and 123 , and second electrode pads 140 , 141 , and 142 may correspond to common electrode 124 .

[0050] Hereinafter, reference numerals for electrode pads and wiring electrodes will be used interchangeably. That is, the same reference numerals may be used to describe electrode pads and wiring electrodes.

[0051] Therefore, a unit sub-pixel may be defined at a point where each of the first wiring electrodes 121 , 122 , and 123 intersects the second wiring electrode 124 .

[0052] When the first wiring electrodes 121, 122, and 123 are signal electrodes (or data electrodes), the first wiring electrodes 121, 122, and 123 or the first electrode pads 130, 131, and 132 may be connected to the TFT layer 120 provided with a thin film transistor (TFT). Therefore, the light emitting elements 210, 220, and 230 may be driven by switching driving of the TFT layer 120.

[0053] exist Figure 1 In the embodiment, although the TFT layer 120 is schematically shown as one layer, the TFT layer 120 may include a plurality of TFT regions capable of performing a switching operation. For example, each TFT region includes a gate electrode, a source electrode, a drain electrode, an insulating layer therebetween, and a through-hole electrode capable of being connected to the first wiring electrodes 121, 122, and 123 (or the first electrode pads 30, 131, and 132). A detailed description thereof will be omitted. These TFT regions may be connected to the light emitting elements 210, 220, and 230, respectively.

[0054] A plurality of light emitting elements 200 ( 210 , 220 , and 230 ) may be electrically connected to wiring electrodes 121 , 122 , 123 , and 124 to form respective sub-pixels.

[0055] As described above, the light emitting element 200 may include a red light emitting element 210, a green light emitting element 220, and a blue light emitting element 230, and these three light emitting elements 210, 220, and 230 may constitute a single sub-pixel and be repeatedly positioned on the wiring substrate 100. These light emitting elements 210, 220, and 230 may include at least one of an organic LED and an inorganic LED. For example, the light emitting elements 210, 220, and 230 may be inorganic semiconductor LEDs.

[0056] The semiconductor light emitting element 200 may have a size of micrometers (μm). The size of micrometers (μm) may mean that the width of at least one side of the light emitting element 200 has a size of several micrometers (μm) to several hundred micrometers (μm).

[0057] TFT layer 120 may be located on substrate 110, and insulating layer 150 may be coated on TFT layer 120. Insulating layer 150 may cover wiring electrodes 121, 122, 123, and 124, electrode pads 130, 131, 132, 140, 141, and 142, and connection portions between light emitting elements 210, 220, and 230.

[0058] For example, the respective light emitting elements 210, 220, and 230 may be separated from each other by a barrier wall 160. In addition, a cover layer 170 may be positioned on the light emitting elements 210, 220, and 230 and the barrier wall 160.

[0059] As described above, light emitting elements 210, 220, and 230 may be mounted in respective sub-pixel regions 102, 103, and 104 to form respective sub-pixels, and may be repeatedly positioned on wiring substrate 100. For example, each pixel region 101 may be repeatedly arranged on wiring substrate 100.

[0060] In this case, the pixel region 101 may be repeatedly positioned along a row of data electrodes 121, 122, and 123 (first wiring electrodes) or a row of scan electrodes 124 (second wiring electrodes) in the longitudinal direction. Figure 1 In the embodiment, the red light emitting element 210, the green light emitting element 220 and the blue light emitting element 230 can be repeatedly positioned in the left-right direction. For example, the red light emitting element in the adjacent pixel area can be located on the right side of the blue light emitting element 230.

[0061] At the same time, another data electrode (first wiring electrode) line or scanning electrode (second wiring electrode) line adjacent to one data electrode (first wiring electrode) line or scanning electrode (second wiring electrode) line can be positioned in parallel. In this case, another pixel region 101 in which the light-emitting elements 210, 220 and 230 are arranged identically to the pixel region 101 can be located in an adjacent data electrode (first wiring electrode) line or an adjacent scanning electrode (second wiring electrode) line.

[0062] In this case, light-emitting elements having the same color can be positioned adjacent to each other in adjacent pixel regions. For example, when red light-emitting element 210, green light-emitting element 220, and blue light-emitting element 230 are repeatedly formed along a data electrode (first wiring electrode) line or a scanning electrode (second wiring electrode) line, light-emitting elements having the same color can be repeatedly positioned in a direction perpendicular to the data electrode (first wiring electrode) line or the scanning electrode (second wiring electrode) line.

[0063] Figure 2 is a conceptual diagram showing an implementation example of a display device using a semiconductor light emitting element according to an embodiment of the present disclosure. Figure 3 is a plan view showing an implementation example of a display device using a semiconductor light emitting element according to an embodiment of the present disclosure.

[0064] refer to Figure 2 and Figure 3 , a display device is shown by combining a plurality of unit display devices 10, 11, 12, and 13 with each other.

[0065] One display device may be implemented by connecting unit display devices 10, 11, 12, and 13 each having a specific size. In this case, each of the unit display devices 10, 11, 12, and 13 may be referred to as a display module. That is, a modular display device may be manufactured by combining a plurality of unit display devices 10, 11, 12, and 13. Hereinafter, the same reference numerals will be used to describe the unit display device and the display module or modules.

[0066] Figure 2 A state in which two unit display devices 10 and 11 are coupled to each other is shown, wherein the sides of the two unit display devices 10 and 11 face each other. In this case, the sides of the two unit display devices 10 and 11 may face each other to form a boundary portion or interface I. Ideally, the interface I should be in contact with each other without a gap, but in reality, due to manufacturing tolerances, etc., an unexpected air layer may be located therebetween. The air layer of the interface I may cause an unexpected change in the optical path between the two modules 10 and 11. For example, depending on the change in the refractive index between the two modules 10 and 11, phenomena such as a change in the color of light may occur. Therefore, a design element (technical feature) may be required to prevent this phenomenon.

[0067] The design elements of the unit display devices 10 and 11 will now be described. The design elements of the respective modules 10 and 11 may include a height h1 of the light emitting elements 210, 220, and 230, a height h2 of the cover layer 170 excluding the height h1 of the light emitting elements 210, 220, and 230, and a distance D between the light emitting elements 210, 220, and 230. Here, the height h2 of the cover layer 170 excluding the height h1 of the light emitting elements 210, 220, and 230 may be a height excluding the height of the optical layer 180.

[0068] Here, since the light emitting elements 210 , 220 , and 230 constitute sub-pixels in each of the modules 10 and 11 , the distance D between the light emitting elements 210 , 220 , and 230 may correspond to the shortest distance between adjacent sub-pixels in the modules 10 and 11 .

[0069] Meanwhile, since the modules 10 and 11 are combined to form a display device, a distance C between the interface I of the modules 10 and 11 and the adjacent sub-pixels 210 and 230 may be considered. Figure 2 An example is shown in which one module includes three light emitting elements 210, 220 and 230, but this is shown for convenience. Figure 3 As shown, one module 10 , 11 , 12 or 13 may include a plurality of light emitting elements 210 , 220 and 230 determined as one pixel 101 according to an implementation example of the display device.

[0070] refer to Figure 3 As an exemplary embodiment, one pixel 101 may include three light emitting elements 210, 220, and 230. The light emitting elements 210, 220, and 230 may be electrically connected to pairs of electrode pads 130 and 140, 131 and 141, and 132 and 142, respectively.

[0071] Additionally, design elements of each of the modules 10 , 11 , 12 , 13 may include a shortest distance A between adjacent pixels 101 within each of the modules 10 , 11 , 12 , and 13 and a shortest distance B between adjacent pixels 101 including the module interface I.

[0072] Here, "A" may correspond to the shortest distance between any two adjacent pixels 101 within each of the modules 10, 11, 12, and 13, and "B" may correspond to the shortest distance between two adjacent pixels 101 including the module interface I. In other words, "B" may correspond to a value obtained by adding the shortest distance between two adjacent pixels 101 to the (unintended) interval of the module interface I.

[0073] As described above, “C” may correspond to the distance between the module interface I and the adjacent sub-pixel. “D” may correspond to the shortest distance between two adjacent sub-pixels within each of the modules 10 , 11 , 12 , and 13 .

[0074] Meanwhile, "E" may correspond to a pixel pitch in each of modules 10, 11, 12, and 13. That is, "E" may correspond to a pixel pitch associated with resolution. Figure 3 In FIG. 1 , “E” is represented as the distance between the centers of two adjacent pixels 101 . However, “E” may also be represented as the distance between the edges of two adjacent pixels 101 .

[0075] refer to Figure 3 , “F” may correspond to a pixel pitch including the module interface I. In other words, “F” may correspond to a value obtained by adding a distance between centers of two adjacent pixels 101 and an (unintended) interval of the module interface I.

[0076] The design elements "A" to "F" in such a unit display module or adjacent display modules have the following exemplary features.

[0077] 1. The shortest distance B between two adjacent pixels 101 including the interface I may be greater than the shortest distance A between adjacent pixels 101 in each display module (B>A).

[0078] 2. The distance C between the interface I and the adjacent sub-pixel may be greater than the shortest distance D between adjacent sub-pixels in the display module (C>D).

[0079] 3. The distance C between the interface I and the adjacent sub-pixel can be greater than half of the shortest distance between adjacent pixels in the display module (C>0.5A).

[0080] 4. The pixel pitch F including the interface I can be equal to or less than 1.1 times the pixel pitch in the display module (F≤1.1E).

[0081] 5. The pixel pitch F including the interface I can be 1.05 to 1.1 times the pixel pitch in the display module (F=1.05E to 1.1E).

[0082] In this way, in a display device in which a first display module 10 and a second display module 11 defining a plurality of unit pixel regions are coupled via an interface I therebetween, at least one of the above features 1 to 5 can be applied. Obviously, these conditions can also be applied to other display modules 12 and 13.

[0083] For example, the design elements A to F in the first display module 10 and the second display module 11 may have the following features.

[0084] 6. The distance between interface I and the adjacent sub-pixel may be greater than the shortest distance between adjacent sub-pixels in the first display module 10 or the second display module 11 (C>D), and / or may be greater than half of the shortest distance between adjacent pixels in the first display module 10 or the second display module 11 (C>0.5A).

[0085] 7. The shortest distance between adjacent pixels including the interface I may be greater than the shortest distance between adjacent pixels in the first display module 10 or the second display module 11 (B>A).

[0086] 8. The pixel pitch F including the interface I may be equal to or less than 1.1 times the pixel pitch in the first display module 10 or the second display module 11 (F<=1.1E).

[0087] 9. The pixel pitch F including the interface I may be 1.05 to 1.1 times the pixel pitch in the first display module 10 or the second display module 11 (F=1.05E to 1.1E).

[0088] Here, features 6 to 9 may be substantially the same as features 1 to 5 described above.

[0089] Regarding feature 1 or feature 7, in general, B and A may be designed to be the same to eliminate the heterogeneity of the interface I between the modules. However, in this case, the interface I may appear dark due to the optical loss occurring at the interface I. Therefore, feature 1 or feature 7 may be applied to a modular display device.

[0090] Meanwhile, when feature 1 or feature 7 is applied, the feature may not be appropriate depending on the distance between modules (e.g., depending on the tolerance). Therefore, in this case, feature 6, which is a feature excluding the tolerance, may be applied. That is, at least one of feature 2 and feature 3 may be applied.

[0091] When a single large-area display device is implemented, the cost of raw materials is relatively high, and there are limitations in process equipment and technology. However, modular display devices may have several advantages. For example, large-area display devices of various sizes may be implemented according to the combination of modules. It may be technically easier to manufacture a single unit display device than a single large-area display device. If a problem occurs in a part of the display device, repair and replacement may be easy.

[0092] However, when one display device is realized by connecting a plurality of unit display devices 10, 11, 12, and 13 to each other, various factors may be considered in order to make the unit display devices operate like a single large-area display device. For example, assembly tolerances may occur. In addition, optical loss may occur at the interface I between the modules. The optical loss that may occur at the interface may cause color changes depending on the viewing angle of the display.

[0093] Therefore, when these technical features are applied to a display device, it is possible to exclude unexpected optical phenomena due to the interface I. For example, phenomena such as changes in the color of light according to changes in the refractive index between the two modules 10 and 11 as described above can be eliminated or mitigated.

[0094] Figure 4 is a conceptual diagram showing a color implementation example of a modular display device in an ideal case or when an embodiment of the present disclosure is applied. Figure 5 : is a conceptual diagram showing a phenomenon occurring at an interface of a modular display device as a comparative example.

[0095] First, refer to Figure 5 Description is given. When viewing from above the display modules 1 and 2, the red light emitted by the red light emitting element 3 as the outermost light source may not be visible at a certain angle. This may be a phenomenon caused by the difference in refractive index at the interface of the modules 1 and 2. For example, due to the lack of color (fading phenomenon) caused by the red light, the color that should appear white may appear cyan (green light + blue light), resulting in visible cyan lines.

[0096] On the other hand, when viewed from below the display modules 1 and 2, the blue light emitted from the blue light emitting element 5 as the external light source may not be visible at a certain angle. This may be a phenomenon caused by the difference in refractive index at the interface of the modules 1 and 2. For example, due to the lack of color (fading phenomenon) caused by the blue light, the color that should appear white may appear yellow (red light + green light), resulting in visible yellow lines.

[0097] However, if at least one of the above-mentioned features of the present disclosure is applied, such as Figure 4 As shown, even when the display modules 10 and 11 are observed from above or below, there are no defects in the red light of the red light emitting element 210 and the blue light of the blue light emitting element 230, so that white light can be normally realized.

[0098] Figures 6 to 8 is a conceptual diagram illustrating a light emission form according to a distance between an interface and an adjacent sub-pixel in a modular display device.

[0099] Figures 6 to 8 The paths of incident light and reflected light according to Snell's law are schematically shown, that is, the paths of incident light and reflected light according to the distance C between the interface I and the adjacent sub-pixel in the modular display device are shown.

[0100] Snell's law is a law that expresses the relationship between the angle of incidence, the angle of reflection, and the angle of refraction when light is obliquely incident on the interface of different media.

[0101] refer to Figures 6 to 8 , the refractive index inside the display modules 10 and 11 is denoted as n2. As an example, the light paths for the refractive index of the cover layer 170 and the refractive index of the outside (in air) are shown.

[0102] Figure 6 The relationship between the incident light P1 and the refracted light R1 is shown when the distance C between the interface I between the display modules 10 and 11 and the adjacent sub-pixel (e.g., the red light emitting element 230) is an ideal distance C1. In this case, the height of the interface I is H. The incident angle of the incident light P1 is θ2, and the refraction angle of the refracted light R1 is θ1.

[0103] exist Figure 6 In the case where the distance between interface I and the sub-pixel adjacent to interface I (for example, the red light-emitting element 230) is C1, light P1 emitted from the edge of the red light-emitting element 230 located at the outermost part of module 10 reaches the outer surface (emitting surface) of module 10 or reaches the outer surface (emitting surface) between modules 10 and 11 before reaching interface I.

[0104] Therefore, the light P1 emitted from the edge of the red light emitting element 230 does not pass through the interface or is not refracted at the interface I, but is partially refracted at the outer surface (emitting surface) between the modules 10 and 11 or refracted at a constant refraction angle θ1 to generate refracted light R1. Therefore, even if the display modules 10 and 11 are observed at an inclined angle, fading does not occur.

[0105] Figure 7 Corresponding to the case where the distance between the interface I and the adjacent sub-pixel (for example, the red light emitting element 230) is C2, C2 is Figure 6 The distance C1 is small.

[0106] In this case, light P2 emitted from the edge of the red light emitting element 230 located at the outermost portion of the module 10 reaches the interface I before reaching the outer side surface (emitting surface) of the module 10. Therefore, light P1 emitted from the edge of the red light emitting element 230 is refracted again to the inside of the module 10 at the interface I, and is refracted again at the outer side surface (emitting surface) of the module 10 to generate refracted light R2.

[0107] In this way, if the distance between the sub-pixel adjacent to the interface I and the interface I is insufficient, the light P2 emitted from the edge of the red light emitting element 230 located at the outermost portion of the module 10 may not be emitted to the adjacent module 11, and may be refracted again and emitted to the module 10. Therefore, when the observer observes the display module at an oblique angle, the color of the corresponding sub-pixel may not be visible, and thus fading may occur.

[0108] exist Figure 8In the example, the distance between the interface I and the adjacent sub-pixel (for example, the red light emitting element 230) is C3, and C3 is Figure 6 The distance C1 in is large. For example, Figure 8 It can correspond to the case where the above features are applied. In particular, Figure 8 The situation may correspond to feature 2, feature 3 or feature 6 in the above-mentioned technical features.

[0109] In this way, if the distance C3 between interface I and the adjacent sub-pixel (for example, the red light-emitting element 230) is large enough, the light P3 emitted from the edge of the red light-emitting element 230 located at the outermost part of the module 10 reaches the outer surface (emitting surface) of the module 10 before reaching the interface I.

[0110] Therefore, the light P1 emitted from the edge of the red light emitting element 230 is partially refracted at the outer surface (emitting surface) between the modules 10 and 11, or is refracted at a constant refraction angle θ1 to generate refracted light R3. Therefore, even if the observer observes the display modules 10 and 11 at an inclined angle, a fading phenomenon of lack of color does not occur.

[0111] As described above, if at least one of the features of the present disclosure described above is applied, even if the observer observes the display modules 10 and 11 upward or downward at an inclined angle, there is no lack of red light emitted by the red light emitting element 210 located at the outermost portion of the module or blue light emitted by the blue light emitting element 230. Therefore, the fading phenomenon may not occur, and thus white light may be normally realized.

[0112] The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present disclosure and should not be limited to one embodiment. In addition, the features, structures, effects, etc. described in the various embodiments may even be combined or modified by those skilled in the art relative to other embodiments, and therefore, such combinations and modifications should be interpreted as being within the scope of the present disclosure.

[0113] Although the present disclosure has been specifically shown and described with reference to the exemplary embodiments of the present disclosure, these embodiments are presented for illustrative purposes only and do not limit the present disclosure, and it is obvious to those skilled in the art that various changes can be made in form and detail without departing from the basic features of the embodiments set forth herein. For example, the corresponding configurations set forth in the embodiments can be modified and applied. In addition, the differences in these modifications and applications should be interpreted as falling within the scope of the present disclosure as defined by the appended claims.

Claims

1. A display device implemented by combining a plurality of unit display modules, wherein a plurality of unit pixel regions are defined in the plurality of unit display modules, in, The plurality of unit display modules are combined with each other through interfaces therebetween, Wherein, each unit display module includes: an electrode pad arranged in a unit pixel to define a plurality of unit sub-pixels; and a light emitting element electrically connected to the electrode pad, and Wherein, the shortest distance between adjacent pixels including the interface is greater than the shortest distance between adjacent pixels in the display module.

2. The display device according to claim 1, wherein: The distance between the interface and the adjacent sub-pixel is greater than the shortest distance between adjacent sub-pixels in the display module.

3. The display device according to claim 1, wherein: The distance between the interface and the adjacent sub-pixel is greater than half of the shortest distance between adjacent pixels in the display module.

4. The display device according to claim 1, wherein: The pixel pitch including the interface is equal to or less than 1.1 times the pixel pitch in the display module.

5. The display device according to claim 1, wherein: The pixel pitch including the interface is 1.05 to 1.1 times the pixel pitch in the display module.

6. The display device according to claim 1, wherein: An unintended air layer is located in the interface.

7. A display device implemented by combining a first display module and a second display module, wherein a plurality of unit pixel regions are defined in the first display module and the second display module, and an interface is provided between the first display module and the second display module. in, At least one of the first display module or the second display module includes: an electrode pad arranged in a unit pixel to define a plurality of unit sub-pixels; and a light emitting element electrically connected to the electrode pad, and The distance between the interface and the adjacent sub-pixel is greater than the shortest distance between adjacent sub-pixels in the first display module or the second display module, or greater than half of the shortest distance between adjacent pixels in the first display module or the second display module.

8. The display device according to claim 7, wherein: The shortest distance between adjacent pixels including the interface is greater than the shortest distance between adjacent pixels in the first display module or the second display module.

9. The display device according to claim 7, wherein: A pixel pitch including the interface is equal to or less than 1.1 times a pixel pitch in the first display module or the second display module.

10. The display device according to claim 7, wherein: The pixel pitch including the interface is 1.05 to 1.1 times the pixel pitch in the first display module or the second display module.

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