Light-emitting apparatus

Abstract

According to one aspect of the present invention, a light-emitting apparatus comprises: a first light-transmitting layer for transmitting light; a first light-emitting device supported by the first light-transmitting layer to generate light for forming a first image; a second light-transmitting layer stacked on the first light-emitting device to transmit light; and a second light-emitting device supported by the second light-transmitting layer and for generating light for forming a second image at least partially overlapping the first image.

Description

light-emitting device

[0001] The present invention relates to a light-emitting device.

[0002] Light-emitting diodes (LEDs) have been widely used recently. LEDs utilize the properties of compound semiconductors to convert electrical signals into forms of light such as infrared, visible light, and ultraviolet light.

[0003] As the light efficiency of light-emitting diodes increases, light-emitting devices are being applied in various fields, including display devices, lighting fixtures, and vehicles.

[0004] Recently, there has been an increasing need for light-emitting devices that emit light capable of displaying various information.

[0005] Embodiments of the present invention aim to provide a light-emitting device capable of forming three-dimensional images such as shapes, characters, and images.

[0006] Embodiments of the present invention aim to provide a light-emitting device capable of increasing the visibility of a three-dimensional image.

[0007] According to one aspect of the present invention, a light-emitting device may be provided, comprising: a first light-transmitting layer that transmits light; a first light-emitting device supported by the first light-transmitting layer that generates light for forming a first image; a second light-transmitting layer laminated on the first light-emitting device that transmits light; and a second light-emitting device supported by the light-transmitting layer that generates light for forming a second image in which at least a portion overlaps with the first image.

[0008] Additionally, a light-emitting device may be provided, wherein the first light-emitting device comprises a plurality of first light-emitting elements arranged spaced apart from each other in a direction perpendicular to the stacking direction; and a first conductor electrically connected to the plurality of first light-emitting elements, and the second light-emitting device comprises a plurality of first light-emitting elements arranged spaced apart from each other in a direction perpendicular to the stacking direction; and a second conductor electrically connected to the plurality of first light-emitting elements.

[0009] In addition, a light-emitting device may be provided in which the plurality of first light-emitting elements and the first conductor are covered by the second light-transmitting layer.

[0010] Additionally, a light-emitting device may be provided in which the spacing between the plurality of first light-emitting elements is greater than the width of each of the plurality of first light-emitting elements, and the spacing between the plurality of second light-emitting elements is greater than the width of each of the plurality of second light-emitting elements.

[0011] In addition, a light-emitting device may be provided that further includes a molding layer covering the plurality of second light-emitting elements.

[0012] In addition, a light-emitting device may be provided such that, by the first light-emitting device and the second light-emitting device, the relative intensity of light transmitted through the central region of the molding layer is greater than the relative intensity of light transmitted through the edge region of the molding layer.

[0013] In addition, a light-emitting device may be provided in which the molding layer, the first light-transmitting layer, and the second light-transmitting layer comprise the same material.

[0014] Additionally, a light-emitting device may be provided in which the molding layer comprises a material different from the first light-transmitting layer and the second light-transmitting layer.

[0015] In addition, a light-emitting device may be provided in which the molding layer has a refractive index different from that of the first light-transmitting layer and the second light-transmitting layer.

[0016] Additionally, a light-emitting device may be provided in which, when any one of the plurality of first light-emitting elements is projected onto any one of the plurality of second light-emitting elements in a stacking direction, only a portion thereof is arranged to overlap with any one of the plurality of second light-emitting elements.

[0017] Additionally, a light-emitting device may be provided such that when another of the plurality of first light-emitting elements is projected onto another of the plurality of second light-emitting elements in a stacking direction, the edge is arranged to overlap with the edge of the other of the plurality of second light-emitting elements.

[0018] Additionally, a light-emitting device may be provided in which one of the plurality of first light-emitting elements is positioned closer to the edge of the first light-transmitting layer than another of the plurality of first light-emitting elements.

[0019] Additionally, a light-emitting device may be provided in which, when any one of the plurality of first light-emitting elements is projected onto any one of the plurality of second light-emitting elements in a stacking direction, only a portion thereof is arranged to overlap with any one of the plurality of second light-emitting elements.

[0020] In addition, a light-emitting device may be provided in which the relative intensity of light generated from the plurality of first light-emitting elements and the relative intensity of light generated from the plurality of second light-emitting elements are different from each other.

[0021] In addition, a light-emitting device may be provided in which the first image and the second image are the same image.

[0022] In addition, a light-emitting device may be provided in which the edges of the first light-transmitting layer and the edges of the second light-transmitting layer are connected to each other and formed integrally.

[0023] Additionally, a light-emitting device may be provided, further comprising: a third light-transmitting layer that is laminated to the second light-emitting device and transmits light; and a third light-emitting device that is supported by the third light-transmitting layer and generates light to form a third image in which at least a portion is superimposed on the first image and the second image, wherein the first image, the second image, and the third image are the same image.

[0024] In addition, a light-emitting device may be provided in which the third light-transmitting layer, the second light-transmitting layer, and the first light-transmitting layer have different refractive indices.

[0025] Additionally, a light-emitting device may be provided, comprising: a first light-transmitting layer that transmits light; a first light emitter supported by the first light-transmitting layer and generating light to form a first image; a second light-transmitting layer laminated on the first light emitter and transmitting light; a second light emitter supported by the second light-transmitting layer and generating light to form a second image in which at least a portion overlaps with the first image; and a controller that controls the current applied to the first light emitter and the second light emitter so that light is generated from the first light emitter and the second light emitter, wherein the controller controls the current applied to the first light emitter and the current applied to the second light emitter to be formed differently from each other.

[0026] Additionally, a light-emitting device may be provided, comprising: a first light-transmitting layer that transmits light; a first light emitter disposed on the first light-transmitting layer that generates light to form a first image; a second light-transmitting layer laminated on the first light emitter that transmits light; and a second light emitter disposed on the second light-transmitting layer that generates light to form a second image in which at least a portion overlaps with the first image, wherein an overlapping region is formed between the first image and the second image, and the light density of the first light emitter irradiated into the overlapping region and the light density of the second light emitter irradiated into the overlapping region are different.

[0027] One embodiment of the present invention has the effect of maintaining light transmittance when light is not emitted from a plurality of light-emitting elements, and being able to display shapes, characters, emoticons, pictures, etc. three-dimensionally when light is emitted from a plurality of light-emitting elements.

[0028] One embodiment of the present invention has the effect of ensuring visibility because light transmittance can be maintained when light is not generated from a plurality of light-emitting elements.

[0029] One embodiment of the present invention has the effect of improving the visibility of information displayed by a light-emitting module by forming a three-dimensional image.

[0030] One embodiment of the present invention has the effect of giving vividness to the three-dimensional image displayed by the light-emitting module.

[0031] One embodiment of the present invention can form different light densities for forming a stereoscopic image, thereby having the effect of increasing the visibility and spatial sense of the stereoscopic image.

[0032] One embodiment of the present invention has the effect of increasing design freedom because the thickness of a plurality of light emitters is formed thinly, thereby effectively securing the internal space of the light-emitting module.

[0033] One embodiment of the present invention has the effect of reducing light loss and improving light extraction efficiency.

[0034] One embodiment of the present invention has the effect of delaying moisture penetration and improving reliability by increasing the length of the moisture penetration path toward the light-emitting element.

[0035] One embodiment of the present invention has the effect of increasing reliability.

[0036] One embodiment of the present invention has the effect of reducing glare because light leakage can be prevented.

[0037] FIG. 1 is a drawing showing a first example of a light-emitting device according to a first embodiment of the present invention applied to a vehicle.

[0038] FIG. 2 is a drawing showing a second example of a light-emitting device according to the first embodiment of the present invention applied to a vehicle.

[0039] FIG. 3 is a drawing showing a light-emitting module of a light-emitting device according to a first embodiment of the present invention.

[0040] Figure 4 is a drawing showing the first light-emitting layer of the light-emitting module of Figure 3 as viewed from the top.

[0041] FIG. 5 is a drawing showing a light-emitting module of a light-emitting device according to a second embodiment of the present invention.

[0042] Figure 6 is a graph showing the relative intensity of light from each of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer of the light-emitting module of Figure 5.

[0043] FIG. 7 is a drawing showing a light-emitting module of a light-emitting device according to a third embodiment of the present invention.

[0044] In the following description, numerous specific details are described for the purpose of explanation and to provide a complete understanding of the various embodiments or implementations of the present disclosure. As used herein, “Embodiments” and “Implementations” are interchangeable terms indicating non-limiting examples of devices or methods utilizing one or more of the concepts of the invention disclosed herein. However, it will be apparent that various embodiments may be implemented without utilizing these specific details or by utilizing one or more equivalent arrangements. In other examples, known structures and devices are illustrated in block diagram form to avoid unnecessarily obscuring the various embodiments. Furthermore, while various embodiments may differ from one another, they do not need to be exclusive. For example, specific shapes, configurations, and characteristics of an embodiment may be used or implemented in other embodiments without departing from the scope of the concept of the invention.

[0045] Unless otherwise specified, the illustrated embodiments should be understood as providing exemplary features of varying details in some ways in which the concept of the present invention can actually be realized. Therefore, unless otherwise specified, features, components, modules, layers, membranes, panels, regions and / or modes of various embodiments (hereinafter referred to individually or collectively as “elements”) may be combined, separated, interchanged, and / or rearranged differently without departing from the scope of the concept of the present invention.

[0046] The use of cross-hatching and / or shading in the attached drawings is generally provided to clarify the boundaries between adjacent elements. As such, the presence or absence of cross-hatching or shading, unless otherwise specified, does not imply or indicate any preference or requirement regarding the specific material, material properties, dimensions, proportions, commonalities between the exemplified elements, or any other features, attributes, and characteristics of the elements. Additionally, in the attached drawings, the size and relative size of the elements may be exaggerated for clarity and / or illustrative purposes. When embodiments are implemented differently, specific process sequences may be performed differently from the described order. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to the described order. Also, the same reference numerals indicate the same elements.

[0047] When an element such as a layer is referred to as being "on", "connected to," or "coupled to" another element or layer, said element may be directly on, connected to, or coupled to the other element or layer, or an interposed element or layer may exist. However, when an element or layer is referred to as being "directly on", "directly connected to," or "directly coupled to" another element or layer, no interposed element or layer exists. To this end, the term "connected" may refer to a physical, electrical, and / or fluid connection with or without an interposed element. Furthermore, the DR1-axis, DR2-axis, and DR3-axis are not limited to the three axes of an orthogonal coordinate system, such as the x, y, and z axes, and may be interpreted in a broader sense. For example, the DR1-axis, DR2-axis, and DR3-axis may be perpendicular to each other, or they may represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “one or more of X, Y, and Z” and “one or more selected from the group consisting of X, Y, and Z” may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as, for example, XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed articles.

[0048] Although terms such as “first,” “second,” etc., may be used herein to describe various forms of elements, these elements shall not be limited by these terms. These terms are used to distinguish one element from another. Therefore, the first element discussed below may be named the second element without departing from the teachings of the present disclosure.

[0049] Spatially relative terms such as “below,” “under,” “immediately below,” “lower,” “above,” “upper,” “upper,” “higher,” and “side” (e.g., as in “side wall”) may be used for descriptive purposes and thereby to describe the relationship between one element and another element(s) as illustrated in the drawings. Spatially relative terms are intended to include different orientations of the device in use, operation, and / or manufacture in addition to the orientations illustrated in the drawings. For example, if the device in the drawings is inverted, the element described as “below” or “under” another element or feature will be oriented “above” the other element or feature. Therefore, the exemplary term “below” may include both upper and lower orientations. Additionally, the device may be oriented differently (e.g., rotated 90° or oriented in a different orientation), and thus, spatially relative descriptors used herein may also be interpreted accordingly.

[0050] The technical terms used in this specification are intended to describe specific embodiments and are not limiting. The singular form used in this specification also includes the plural form unless the context clearly indicates otherwise. Additionally, the terms “comprising,” “comprising,” “comprising,” and / or “comprising” used in this specification specify the presence of the mentioned features, integers, steps, operations, elements, components, and / or groups thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Furthermore, the terms “substantially,” “about,” and other similar terms used in this specification are used to indicate approximation rather than degree, and are used to describe inherent deviations of measured, calculated, and / or provided values ​​that may be recognized by a person of ordinary knowledge in the art.

[0051] Various embodiments are described below with reference to cross-sectional and / or exploded drawings, which are schematic examples of idealized embodiments and / or intermediate structures. As such, variations from the shapes in the drawings may be expected, for example, as a result of manufacturing techniques and / or tolerances. Therefore, the embodiments disclosed herein should not be interpreted as being limited to the shapes of specific illustrated regions, but should be interpreted to include, for example, deviations in shape resulting from manufacturing. In this way, the regions illustrated in the drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and thus are not intended to have a limiting meaning.

[0052] As is customary in the art, some embodiments may be illustrated and described in the accompanying drawings in terms of functional blocks, units, and / or modules. Those skilled in the art will understand that these blocks, units, and / or modules are physically implemented by electronic (or optical) circuits, such as logic circuits, discrete components, microprocessors, wiring circuits, memory elements, and wiring connections, formed using semiconductor-based manufacturing technology or other manufacturing technology. Where blocks, units, and / or modules are implemented by microprocessors or other similar hardware, they may be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and may optionally be driven by firmware and / or software. Additionally, each block, unit, and / or module may be implemented by dedicated hardware, or as a combination of dedicated hardware for performing some functions and a processor for performing other functions (e.g., one or more programmed processors and associated circuits). Additionally, each of the blocks, units, and / or modules of some embodiments may be physically separated into two or more interacting and individual blocks, units, and / or modules without departing from the scope of the concept of the present invention. Additionally, the blocks, units, and / or modules of some embodiments may be physically combined into more complex blocks, units, and / or modules without departing from the scope of the concept of the present invention.

[0053] Unless otherwise defined, all terms used herein (including technical or scientific terms) have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with that meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0054] Hereinafter, a light-emitting device (1) according to the first embodiment of the present invention will be described.

[0055] Referring to FIGS. 1 and 2, the light-emitting device (1) can generate light to form a three-dimensional image with a three-dimensional quality, thereby displaying characters, symbols, and images. The three-dimensional image may include 2D images, 3D images, etc. Additionally, the light-emitting device (1) may be mounted on a vehicle. The light-emitting device (1) may be composed of or include the vehicle's windows, windshield, rear window, taillight, headlight, rear lamp, tail lamp, and interior light. Such a light-emitting device (1) may be manufactured in a preset shape and may emit light according to an applied current signal.

[0056] The light-emitting device (1) can emit light over the entire area of ​​a preset shape or emit light only in a part of the entire area to display various information. As a first example, the light-emitting device (1) can emit light over the entire area to display the hazard lights of a vehicle. As a second example, the light-emitting device (1) can emit light only in a part of the area to display the brake lights by displaying only the bottom edge of the shape displaying the hazard lights of a vehicle. The entire area of ​​the light-emitting device (1) can be divided into multiple areas. For example, the multiple areas may include a first area that emits light to display the hazard lights and a second area that emits light to display the brake lights. The multiple areas can emit light simultaneously or separately without interference with each other.

[0057] In addition, the light-emitting device (1) can be installed and applied in various places composed of plates having light-transmitting properties, such as glass, as well as in vehicles. In other words, the light-emitting device (1) can be applied to subway glass, bus glass, airplane windows, building exterior walls, building windows, outdoor advertisements, etc. For example, the light-emitting device (1) can be installed in a subway window to display subway route map information.

[0058] The light-emitting device (1) may include a light-emitting module (10) and a controller (20).

[0059] Referring further to FIGS. 3 and 4, the light-emitting module (10) can form a three-dimensional image. The three-dimensional image can be formed by overlapping a plurality of images, which will be described later. In other words, the light-emitting module (10) can form a plurality of images that overlap each other. The plurality of images may form the same image, but are not limited thereto. Additionally, the plurality of images may be arranged so that they overlap by at least 50% in a predetermined overlapping area. In other words, any one of the plurality of images may be arranged so that it overlaps by at least 50% with respect to another of the plurality of images in the overlapping area. The overlapping area may be the central area of ​​the three-dimensional image. Such a light-emitting module (10) may include a first light-emitting layer (100), a second light-emitting layer (200), and a molding layer (300).

[0060] The first light-emitting layer (100) can support the second light-emitting layer (200). The relative intensity of the first light-emitting layer (100) may be formed differently from the relative intensity of the second light-emitting layer (200). For example, the relative intensity of the first light-emitting layer (100) may be formed to be greater than the relative intensity of the second light-emitting layer (200), but is not limited thereto. The first light-emitting layer (100) may include a first light-transmitting layer (110) and a first light-emitting device (120).

[0061] The first light-transmitting layer (110) can support the first light-emitting device (120). The first light-transmitting layer (110) is formed of a light-transmitting material and may include one or more of PMMA (Polymethyl Methacrylate), PC (Polycarbonate) resin, COP (Cyclo Olefin Polymer), acrylic resin, PE (Polyethylene), epoxy resin, glass, and quartz. The first light-transmitting layer (110) may further include a diffusing material or a reflective material to improve the distribution of transmitted light. This first light-transmitting layer (110) may have a thickness of approximately 3 mm to 5 mm. The first light-transmitting layer (110) may be thicker than the first light-emitting element (121) to be described later.

[0062] The first light-transmitting layer (110) may be a single layer. If the first light-transmitting layer (110) is a single layer, the path of light travel can be formed simply, so it may have high transparency. In addition, the first light-transmitting layer (110) may be composed of multiple layers. In other words, the first light-transmitting layer (110) may be a stacked light-transmitting layer in which two or more layers are stacked. Such a stacked first light-transmitting layer (110) may include a high refractive index layer and a low refractive index layer. The low refractive index layer may be stacked on top of the high refractive index layer. For example, a low refractive index light-transmitting layer with a refractive index of 1.4 to 1.55 may be stacked on top of a high refractive index layer with a refractive index of 1.6 or higher. The path of light in such a stacked first light-transmitting layer (110) may change according to the difference in refractive index. In other words, the light path in the stacked first light-transmitting layer (110) can be corrected by adjusting the difference in refractive index.

[0063] Additionally, the first light-transmitting layer (110) may have a lower refractive index than the light-emitting surface of the first light-emitting element (121). The light-emitting surface may be the surface from which light is emitted from the first light-emitting element (121). Additionally, the first light-transmitting layer (110) may be composed of multiple layers with different light transmittances. For example, one region of the first light-transmitting layer (110) may be treated with a translucent surface treatment to form a transmittance of less than 50%, or may contain particles for controlling the transmittance. The first light-transmitting layer (110) may include scattering materials such as TiO2 or SiO2, or metallic materials such as Ag or Cr, for controlling light transmittance. The first light-transmitting layer (110) with such controlled transmittance may serve to block the first light-emitting element (121) from being visible from the outside.

[0064] The first light emitter (120) can generate light to form a first image. The first light emitter (120) can be laminated onto the first light-transmitting layer (110). The first image can be superimposed with the second image of the second light emitter (220), which will be described later, to form a three-dimensional image. The first light emitter (120) can be formed in the shape of a thin film. Such a first light emitter (120) may include a plurality of first light-emitting elements (121) and a first conductor (122).

[0065] A plurality of first light-emitting elements (121) can generate light. A plurality of first light-emitting elements (121) may be arranged spaced apart from each other in a direction perpendicular to the stacking direction (x-axis direction). A plurality of first light-emitting elements (121) may include an N-type semiconductor layer, a P-type semiconductor layer, and an active layer disposed between the N-type semiconductor layer and the P-type semiconductor layer. Additionally, a plurality of first light-emitting elements (121) may generate light of wavelengths such as red, green, blue, cyan, and orange. Furthermore, a plurality of first light-emitting elements (121) may further include a wavelength conversion material for changing the main wavelength. Additionally, a plurality of first light-emitting elements (121) may include a color filter to change the color of the light.

[0066] Additionally, a plurality of first light-emitting elements (121) may be arranged spaced apart from each other in a direction perpendicular to the stacking direction (up and down direction). For example, a plurality of first light-emitting elements (121) may be arranged in the form of N rows and M columns or a matrix so that an image is formed. As another example, a plurality of first light-emitting elements (121) may be arranged in a diagonal or diamond shape. As yet another example, the spacing between the plurality of first light-emitting elements (121) may be formed differently depending on the shape of the first conductor (122), structure, wiring, etc., thereby reducing the decrease in reliability caused by heat or interference generated from the first conductor (122), wiring structure, etc.

[0067] The spacing between these multiple first light-emitting elements (121) can be formed to be larger than the width of each of the multiple first light-emitting elements (121). In other words, the spacing between the multiple first light-emitting elements (121) can be wider than the horizontal or vertical width of the first light-emitting element (121) when viewed in the stacking direction. If the spacing between the multiple first light-emitting elements (121) is formed to be wider than the horizontal or vertical width of the first light-emitting element (121), the number of first light-emitting elements (121) is reduced, thereby reducing costs, and the light transmittance of the first light-transmitting layer (110) can be increased. Additionally, if the horizontal and vertical widths of the first light-emitting elements (121) are the same or similar, the similarity between the viewing angle in the horizontal direction and the viewing angle in the vertical direction can be increased.

[0068] The width and height of the first light-emitting element (121) may be approximately 500 μm or less, and preferably approximately 200 μm or less. Additionally, the spacing between the plurality of first light-emitting elements (121) may be approximately 100 μm or more. The plurality of first light-emitting elements (121) may emit light of the same series of colors or may emit light of different colors. The interior of the plurality of first light-emitting elements (121) may include sub-pixel elements capable of emitting different main wavelengths. The plurality of first light-emitting elements (121) may each be driven individually or driven by being separated by region.

[0069] When one of the plurality of first light-emitting elements (121) is projected in the stacking direction onto one of the plurality of second light-emitting elements (221) to be described later, only a portion of it may be arranged to overlap with one of the plurality of second light-emitting elements (221). The partially overlapped light-emitting element among the plurality of first light-emitting elements (121) arranged to overlap only a portion with the second light-emitting element (221) may emit light to the outer region of the overlap area. Additionally, the partially overlapped light-emitting element among the plurality of first light-emitting elements (121) may be arranged near the edge of the first light-transmitting layer (110). In other words, the first light-emitting element (121) that emits light to the outer region of the overlap area may be arranged closer to the edge of the first light-transmitting layer (110) than the first light-emitting element (121) that emits light to the overlap area.

[0070] When another of the plurality of first light-emitting elements (121) is projected in the stacking direction onto another of the plurality of second light-emitting elements (221), it can be positioned so that its edge overlaps with the edge of another of the plurality of second light-emitting elements (221). In other words, another of the plurality of first light-emitting elements (121) can completely overlap with another of the plurality of second light-emitting elements (221). This other of the plurality of first light-emitting elements (121) can irradiate light into the overlapping area.

[0071] The first conductor (122) is electrically connected to a plurality of first light-emitting elements (121) and can supply current to the plurality of first light-emitting elements (121). The first conductor (122) can be electrically connected to an external power source to supply current to the plurality of first light-emitting elements (121). When current is supplied to the plurality of first light-emitting elements (121) by this first conductor (122), the plurality of first light-emitting elements (121) can generate light. The first conductor (122) can be placed between the first light-transmitting layer (110) and the plurality of first light-emitting elements (121). The first conductor (122) may include one or more of iron, copper, tin, gold, silver, aluminum, metal compounds, metal oxides, graphite, graphene, and anisotropic conductive films.

[0072] Additionally, the first conductor (122) may be formed by extending along the direction in which a plurality of first light-emitting elements (121) are arranged. For example, the first conductor (122) may be formed as a thin plate in the form of a mesh consisting of horizontal rows and vertical columns corresponding to the N-row and M-column arrangement of the first light-emitting elements (121). Furthermore, the first conductor (122) may be a TFT electrode on which a thin-film transistor, a data electrode, and a channel control electrode are formed. The design freedom of the light-emitting device (1) can be increased by such a first conductor (122). Additionally, the shape of the first conductor (122) may be formed in various shapes as needed.

[0073] The first conductor (122) may be a series circuit connecting a plurality of first light-emitting elements (121) in series, or a parallel circuit connecting a plurality of first light-emitting elements (121) in parallel. Additionally, the first conductor (122) may be a series-parallel circuit connecting a plurality of first light-emitting elements (121).

[0074] Additionally, the first conductor (122) may include a transistor and a capacitor. This first conductor (122) may be formed to individually send current to a plurality of first light-emitting elements (121) so that each of the plurality of first light-emitting elements (121) is driven by active matrix addressing. Additionally, the first conductor (122) may apply a voltage waveform to a plurality of first light-emitting elements (121) so that the plurality of first light-emitting elements (121) are driven by passive matrix addressing. Additionally, the first conductor (122) may be a wire for a signal to control the driving of a plurality of first light-emitting elements (121).

[0075] A second light-emitting layer (200) may be laminated onto a first light-emitting layer (100). The relative intensity of the second light-emitting layer (200) may be formed differently from the relative intensity of the first light-emitting layer (100). For example, the relative intensity of the second light-emitting layer (200) may be formed to be smaller than the relative intensity of the first light-emitting layer (100), but is not limited thereto. In other words, the relative intensity of the second light-emitting layer (200) may be the same as the relative intensity of the first light-emitting layer (100). The second light-emitting layer (200) may include a second light-transmitting layer (210) and a second light-emitting device (220).

[0076] The second light-transmitting layer (210) can support the second light-emitting device (220). The second light-transmitting layer (210) is formed of a light-transmitting material and may include one or more of PMMA (Polymethyl Methacrylate), PC (Polycarbonate) resin, COP (Cyclo Olefin Polymer), acrylic resin, PE (Polyethylene), epoxy resin, glass, and quartz. The second light-transmitting layer (210) may further include a diffusing material or a reflective material to improve the distribution of transmitted light. This second light-transmitting layer (210) may have a thickness of approximately 3 mm to 5 mm. The second light-transmitting layer (210) may be thicker than the second light-emitting element (221) to be described later.

[0077] The second light-transmitting layer (210) may be a single layer. If the second light-transmitting layer (210) is a single layer, the path of light travel is simple, allowing for higher transparency. Additionally, the second light-transmitting layer (210) may be composed of multiple layers. In other words, the second light-transmitting layer (210) may be a stacked light-transmitting layer comprising two or more layers. Such a stacked second light-transmitting layer (210) may include a high refractive index layer and a low refractive index layer. The low refractive index layer may be stacked on top of the high refractive index layer. For example, a low refractive index light-transmitting layer with a refractive index of 1.4 to 1.55 may be stacked on top of a high refractive index layer with a refractive index of 1.6 or higher. The path of light in such a stacked second light-transmitting layer (210) may change according to the difference in refractive index. In other words, the light path in the stacked second light-transmitting layer (210) can be corrected by adjusting the difference in refractive index.

[0078] The second light-transmitting layer (210) may have a lower refractive index than the light-emitting surface of the second light-emitting element (221). The light-emitting surface may be the surface from which light is emitted from the second light-emitting element (221). Additionally, the second light-transmitting layer (210) may be composed of multiple layers with different light transmittances. For example, one region of the second light-transmitting layer (210) may be treated with a translucent surface treatment to form a transmittance of less than 50%, or may include particles for controlling the transmittance. The second light-transmitting layer (210) may include scattering materials such as TiO2 or SiO2, or metallic materials such as Ag or Cr, for controlling light transmittance. The second light-transmitting layer (210) with such controlled transmittance may serve to block one or more of the second light-emitting element (221) and the first light-emitting element (121) from being visible from the outside.

[0079] Additionally, the second light-transmitting layer (210) can be laminated to the first light-emitting device (120). In other words, the second light-transmitting layer (210) can cover a plurality of first light-emitting elements (121) and a first conductor (122). At least a portion of the second light-transmitting layer (210) can be in contact with the first light-transmitting layer (110). In other words, the second light-transmitting layer (210) and the first light-transmitting layer (110) can be formed integrally. For example, the edge of the second light-transmitting layer (210) and the edge of the first light-transmitting layer (110) can be connected to each other. The first light-emitting device (120) can be more effectively protected between the second light-transmitting layer (210) and the first light-transmitting layer (110).

[0080] The second light-transmitting layer (210) may contain the same material as the first light-transmitting layer (110), but is not limited thereto and may contain different materials. When the second light-transmitting layer (210) and the first light-transmitting layer (110) contain the same material, the bonding strength between the first light-emitting layer (100) and the second light-emitting layer (200) may be increased. When the second light-transmitting layer (210) and the first light-transmitting layer (110) contain the same material, the interface between the second light-transmitting layer (210) and the first light-transmitting layer (110) comes into contact due to the bonding strength of the same material, and the gap between the interfaces is minimized, thereby minimizing damage to the first light-emitting element (121) and the second light-emitting element (221) caused by moisture penetration. In addition, if the second light-transmitting layer (210) and the first light-transmitting layer (110) contain the same material, the peel-off phenomenon between the first light-emitting layer (100) and the second light-emitting layer (200) is minimized, and the reliability of the light-emitting device (1) can be improved.

[0081] The second light-transmitting layer (210) and the first light-transmitting layer (110) may have the same refractive index, but are not limited thereto and may have different refractive indices. Additionally, the second light-transmitting layer (210) and the first light-transmitting layer (110) may have the same light transmittance, but are not limited thereto and may have different light transmittances. For example, the second light-transmitting layer (210) and the first light-transmitting layer (110) may have different light transmittances or different refractive indices so that more light is emitted in either the upward or downward direction of the plurality of first light-emitting elements (121). In other words, the refractive index of the second light-transmitting layer (210) may be formed lower than the refractive index of the first light-transmitting layer (110) so that the relative light intensity of the light emitted upward from the first light-emitting element (121) is formed to be high. As another example, the second light-transmitting layer (210) and the first light-transmitting layer (110) may have different light transmittances or different refractive indices so that the relative light intensity of the light emitted upward and downward from the plurality of first light-emitting elements (121) is formed to be the same.

[0082] The second light emitter (220) can generate light to form a second image that overlaps at least a portion of the first image. The second light emitter (220) can be formed in the shape of a thin film. The second light emitter (220) can be laminated onto the second light-transmitting layer (210). The second image can overlap with the first image to form a three-dimensional image. The second image may be the same image as the first image. The light density of the second light emitter (220) emitted into the overlapping area where the first image and the second image overlap, and the light density of the first light emitter (120) emitted into the overlapping area may be formed differently from each other. In other words, the light density of the first light emitter (120) emitted into the overlapping area may be formed to be greater than the light density of the second light emitter (220) emitted into the overlapping area. This second light emitter (220) may include a plurality of second light-emitting elements (221) and a second conductor (222).

[0083] A plurality of second light-emitting elements (221) can generate light. A plurality of second light-emitting elements (221) may be arranged spaced apart from each other in a direction perpendicular to the stacking direction. A plurality of second light-emitting elements (221) may include an N-type semiconductor layer, a P-type semiconductor layer, and an active layer disposed between the N-type semiconductor layer and the P-type semiconductor layer. A plurality of second light-emitting elements (221) may generate light of wavelengths such as red, green, blue, cyan, and orange. Additionally, a plurality of second light-emitting elements (221) may include a wavelength conversion material for changing the main wavelength. Furthermore, a plurality of second light-emitting elements (221) may further include a color filter to change the color of the light.

[0084] Additionally, a plurality of second light-emitting elements (221) may be arranged spaced apart from each other in a direction perpendicular to the stacking direction. For example, a plurality of second light-emitting elements (221) may be arranged in the form of N rows and M columns or a matrix to form an image. As another example, a plurality of second light-emitting elements (221) may be arranged in a diagonal or diamond shape. As yet another example, the spacing between the plurality of second light-emitting elements (221) may be formed differently depending on the shape of the second conductor (222), structure, wiring, etc., thereby reducing the decrease in reliability caused by heat or interference generated from the second conductor (222), wiring structure, etc.

[0085] The spacing between these multiple second light-emitting elements (221) can be formed to be larger than the width of each of the multiple second light-emitting elements (221). In other words, the spacing between the multiple second light-emitting elements (221) can be wider than the horizontal or vertical width of the second light-emitting element (221) when viewed in the stacking direction. If the spacing between the multiple second light-emitting elements (221) is formed to be wider than the horizontal or vertical width of the second light-emitting element (221), the number of second light-emitting elements (221) is reduced, thereby reducing costs and increasing the light transmittance of the second light-transmitting layer (210). Additionally, if the horizontal and vertical widths of the second light-emitting elements (221) are the same or similar, the similarity between the viewing angle in the horizontal direction and the viewing angle in the vertical direction can be increased.

[0086] The width and height of the second light-emitting element (221) may be approximately 500 μm or less, and preferably approximately 200 μm or less. Additionally, the spacing between the plurality of second light-emitting elements (221) may be approximately 100 μm or more. The plurality of second light-emitting elements (221) may emit colors of the same series or different colors. The interior of the plurality of second light-emitting elements (221) may include sub-pixel elements capable of emitting different main wavelengths. The plurality of second light-emitting elements (221) may each be driven individually or driven by being separated by region.

[0087] Additionally, when one of the plurality of second light-emitting elements (221) is projected onto one of the plurality of first light-emitting elements (121) in the stacking direction, it may be positioned so that only a portion of it overlaps with one of the plurality of first light-emitting elements (121). The partially overlapping light-emitting elements, which are positioned so that only a portion of the plurality of second light-emitting elements (221) overlaps with the first light-emitting element (121), can emit light to an area outside the overlap area. Furthermore, the partially overlapping light-emitting elements among the plurality of second light-emitting elements (221) may be positioned near the edge of the second light-transmitting layer (210). In other words, the second light-emitting element (221) that emits light to the outside of the overlap area may be positioned closer to the edge of the second light-transmitting layer (210) than the second light-emitting element (221) that emits light to the overlap area.

[0088] One of the multiple second light-emitting elements (221) can be positioned so that when projected in a stacking direction onto another of the multiple first light-emitting elements (121), its edge overlaps with the edge of the other of the multiple first light-emitting elements (121). In other words, the other of the multiple second light-emitting elements (221) can completely overlap with the other of the multiple first light-emitting elements (121). The other of these multiple second light-emitting elements (221) can irradiate light into the overlapping area.

[0089] Additionally, when the light-emitting module (10) is viewed from below, any one of the plurality of second light-emitting elements (221) and any one of the plurality of second light-emitting elements (221) may be arranged to overlap each other by more than 50%. When the light-emitting module (10) is viewed from above, any one of the plurality of second light-emitting elements (221) and any one of the plurality of second light-emitting elements (221) may be arranged to completely overlap each other. When the light-emitting module (10) is viewed from the side, any one of the plurality of first light-emitting elements (121) and any one of the plurality of second light-emitting elements (221) may be arranged to overlap each other by more than 50%. Since a sense of depth and spatiality can be imparted to the plurality of images through the arrangement relationship between the plurality of first light-emitting elements (121) and the plurality of second light-emitting elements (221), a three-dimensional image to be realized can be formed.

[0090] The second conductor (222) is electrically connected to a plurality of second light-emitting elements (221) and can supply current to the plurality of second light-emitting elements (221). The second conductor (222) can be electrically connected to an external power source to supply current to the plurality of second light-emitting elements (221). When current is supplied to the plurality of second light-emitting elements (221) by this second conductor (222), the plurality of second light-emitting elements (221) can generate light. The second conductor (222) can be placed between the second light-transmitting layer (210) and the plurality of second light-emitting elements (221). The second conductor (222) may include one or more of iron, copper, tin, gold, silver, aluminum, metal compounds, metal oxides, graphite, graphene, and anisotropic conductive films.

[0091] Additionally, the second conductor (222) may be formed by extending along the direction in which a plurality of second light-emitting elements (221) are arranged. For example, the second conductor (222) may be formed as a thin plate in the form of a mesh consisting of horizontal rows and vertical columns corresponding to the N-row and M-column arrangement of the second light-emitting elements (221). Furthermore, the second conductor (222) may be a TFT electrode in which a thin-film transistor, a data electrode, and a channel control electrode are formed. The design freedom of the light-emitting device (1) can be increased by such a second conductor (222). Additionally, the shape of the second conductor (222) may be formed in various shapes as needed.

[0092] The second conductor (222) may be a series circuit connecting multiple second light-emitting elements (221) in series, or a parallel circuit connecting multiple second light-emitting elements (221) in parallel. Additionally, the second conductor (222) may be a series-parallel circuit connecting multiple second light-emitting elements (221).

[0093] Additionally, the second conductor (222) may include a transistor and a capacitor. This second conductor (222) may be formed to individually send current to a plurality of second light-emitting elements (221) so that each of the plurality of second light-emitting elements (221) is driven by active matrix addressing. Additionally, the second conductor (222) may apply a voltage waveform to a plurality of second light-emitting elements (221) so that the plurality of second light-emitting elements (221) are driven by passive matrix addressing. Additionally, the second conductor (222) may be a wire for a signal to control the driving of a plurality of second light-emitting elements (221).

[0094] The molding layer (300) may be laminated onto the second light-emitting layer (200). Meanwhile, the molding layer (300) may be a separate light-transmitting layer. This molding layer (300) may cover a plurality of second light-emitting elements (221) and a second conductor (222). For example, the molding layer (300) may be manufactured in a shape that encloses a portion of the second light-emitting element (221). This molding layer (300) can improve reliability by increasing the length of the moisture penetration path toward the second light-emitting element (221) to delay moisture penetration. Additionally, the molding layer (300) may include an adhesive material. At least one surface of the molding layer (300) may have a higher adhesive strength than the first light-transmitting layer (110) and the second light-transmitting layer (210). For example, the molding layer (300) may include materials such as polyimide, epoxy molding compound, and silicone. This molding layer (300) may be formed into various shapes by a thermoplastic resin.

[0095] The molding layer (300) may have a predetermined refractive index to adjust the light emission angle and light path, or to increase light extraction efficiency. The molding layer (300) may have a different refractive index from the first light-transmitting layer (110) and the second light-transmitting layer (210). For example, the molding layer (300) may have a lower transmittance than the first light-transmitting layer (110) and the second light-transmitting layer (210). For another example, the molding layer (300) may have a higher transmittance than the first light-transmitting layer (110) and the second light-transmitting layer (210). For yet another example, the molding layer (300) may have a lower refractive index than the first light-emitting element (121) and the second light-emitting element (221) to increase light extraction efficiency.

[0096] The molding layer (300) may include low-transparency materials such as chromium, carbon pigment, iron tetroxide (Fe3O4), and graphite so that the path of light travels only in a certain direction, thereby increasing the visibility of the three-dimensional image or increasing color purity. Additionally, the molding layer (300) may include pigments such as BaSO4, TiO2, ZnO, and 2PbCO3·Pb(OH2)2 to increase reflectivity, thereby reflecting light in a certain direction and controlling the angle of light emission.

[0097] The molding layer (300) may contain a material different from the first light-transmitting layer (110) and the second light-transmitting layer (210), or may contain the same material as the first light-transmitting layer (110) and the second light-transmitting layer (210). If the molding layer (300) contains the same material as the first light-transmitting layer (110) and the second light-transmitting layer (210), the bonding strength between the plurality of second light-emitting elements (220) and the second light-transmitting layer (210) can be increased. Due to this bonding strength between the molding layer (300) and the second light-transmitting layer (210), the interface between the molding layer (300) and the second light-transmitting layer (210) comes into contact, and the gap between the interfaces is minimized, thereby minimizing damage to the first light-emitting element (121) and the second light-emitting element (221) caused by moisture penetration. In addition, by minimizing the peel-off phenomenon of the molding layer (300), the reliability of the light-emitting device (1) can be improved.

[0098] Light from the first light emitter (120) and the second light emitter (220) can be transmitted through this molding layer (300). The relative intensity of the light transmitted through the central region of the molding layer (300) and the light transmitted through the outer region of the central region can be formed differently from each other. In other words, the relative intensity of the light transmitted through the central region of the molding layer (300) can be formed to be greater than the relative intensity of the light transmitted through the edge region of the molding layer (300). The light transmitted through the central region of the molding layer (300) may be the light irradiated into the aforementioned overlapping region.

[0099] The controller (20) can control the light-emitting module (10). In other words, the controller (20) can control the current supplied to a plurality of first light-emitting elements (121) and a plurality of second light-emitting elements (221) to drive the first light-emitting element (120) and the second light-emitting element (220) simultaneously or individually. The controller (20) can make the magnitude of the current applied to the first light-emitting element (120) and the magnitude of the current applied to the second light-emitting element (220) different from each other. In other words, the controller (20) can control the current so that the magnitude of the current applied to the first light-emitting element (120) is greater than the magnitude of the current applied to the second light-emitting element (220). By this controller (20), the light density of the first light emitter (120) irradiated into the overlapping area by the controller (20) can be formed to be greater than the light density of the second light emitter (220) irradiated into the overlapping area. Additionally, since the light intensity of the first light emitter (120) can be formed to be greater than the light intensity of the second light emitter (220) by the controller (20), the visibility of the three-dimensional image can be improved.

[0100] Hereinafter, the operation and effects of the light-emitting device (1) according to the first embodiment of the present invention are described.

[0101] A controller (20) of a light-emitting device (1) according to a first embodiment of the present invention can supply current to a first light-emitting device (120) and a second light-emitting device (220) so that light is generated from the first light-emitting device (120) and the second light-emitting device (220). The first light-emitting device (120) can form a first image, and the second light-emitting device (220) can form a second image that is superimposed on the first image. The first image and the second image can be superimposed on each other to form a three-dimensional image. Additionally, the magnitude of the current supplied to the first light-emitting device (120) and the second light-emitting device (220) can be formed differently by the controller (20). By this controller (20), the relative intensity of light of either the first light emitter (120) or the second light emitter (220) can be formed to be greater than the relative intensity of light of the other of the first light emitter (120) and the second light emitter (220).

[0102] When light is not emitted from the light-emitting module (10), it maintains transparency, and when light is emitted from the light-emitting module (10), three-dimensional images such as shapes, characters, emoticons, and pictures can be displayed.

[0103] In addition, if light is not generated from the light-emitting module (10), light transparency can be maintained, so a field of view can be secured.

[0104] In addition, since the light-emitting module (10) can form a three-dimensional image, the visibility of the information displayed by the light-emitting module (10) can be increased.

[0105] In addition, since the density of light generated in the first light-emitting layer (100) and the density of light generated in the second light-emitting layer (200) can be formed differently from each other, the visibility and spatial sense of the three-dimensional image can be increased.

[0106] In addition, since the thickness of the first light emitter (120) and the second light emitter (220) can be formed thinly, the internal space of the light-emitting module (10) can be effectively secured and the degree of design freedom can be increased.

[0107] Additionally, the light-emitting module (10) can be configured such that the length of the moisture permeability path toward the first light-emitting element (121) and the second light-emitting element (221) is long, thereby delaying moisture permeability and improving reliability.

[0108] Hereinafter, with reference to FIGS. 5 and FIGS. 6, a light-emitting device (1) according to a second embodiment of the present invention will be described. In describing the second embodiment, there is a difference in that it further includes a third light-emitting layer (400), and this difference will be explained mainly.

[0109] A third light-emitting layer (400) may be laminated onto a second light-emitting layer (200). The relative intensity of the third light-emitting layer (400) may be formed differently from the relative intensity of the second light-emitting layer (200) and the relative intensity of the first light-emitting layer (100). The relative intensity of the third light-emitting layer (400) may be formed to be smaller than the relative intensity of the first light-emitting layer (100) and the second light-emitting layer (200), but is not limited thereto. In other words, the relative intensity of the third light-emitting layer (400) may be the same as the relative intensity of the first light-emitting layer (100) and the second light-emitting layer (200). The third light-emitting layer (400) may include a third light-transmitting layer (410) and a third light-emitting device (420).

[0110] The third light-transmitting layer (410) can support the third light-emitting device (420). The third light-transmitting layer (410) is formed of a light-transmitting material and may include one or more of PMMA (Polymethyl Methacrylate), PC (Polycarbonate) resin, COP (Cyclo Olefin Polymer), acrylic resin, PE (Polyethylene), epoxy resin, glass, and quartz. The third light-transmitting layer (410) may further include a diffusing material or a reflective material to improve the distribution of transmitted light. This third light-transmitting layer (410) may have a thickness of approximately 3 mm to 5 mm. The third light-transmitting layer (410) may be thicker than the third light-emitting element (421) to be described later.

[0111] The third light-transmitting layer (410) may be a single layer. If the third light-transmitting layer (410) is a single layer, the path of light travel is simple, allowing for higher transparency. Additionally, the third light-transmitting layer (410) may be composed of multiple layers. In other words, the third light-transmitting layer (410) may be a stacked light-transmitting layer comprising two or more layers. Such a stacked third light-transmitting layer (410) may include a high refractive index layer and a low refractive index layer. The low refractive index layer may be stacked on top of the high refractive index layer. For example, a low refractive index light-transmitting layer with a refractive index of 1.4 to 1.55 may be stacked on top of a high refractive index layer with a refractive index of 1.6 or higher. The path of light in such a stacked third light-transmitting layer (410) may change according to the difference in refractive index. In other words, the light path in the stacked third light-transmitting layer (410) can be corrected by adjusting the difference in refractive index.

[0112] The third light-transmitting layer (410) may have a lower refractive index than the light-emitting surface of the third light-emitting element (421). The light-emitting surface may be the surface from which light is emitted from the third light-emitting element (421). Additionally, the third light-transmitting layer (410) may be composed of multiple layers with different light transmittances. For example, one region of the third light-transmitting layer (410) may be treated with a translucent surface treatment to form a transmittance of less than 50%, or may contain particles to control the transmittance. The third light-transmitting layer (410) may include scattering materials such as TiO2 or SiO2 to control light transmittance, or metallic materials such as Ag or Cr. The third light-transmitting layer (410) with such controlled transmittance may serve to block one or more of the second light-emitting element (221), the first light-emitting element (121), and the third light-emitting element (421) from being visible from the outside.

[0113] Additionally, the third light-transmitting layer (410) may be laminated to the second light-emitting device (220). In other words, the third light-transmitting layer (410) may cover a plurality of second light-emitting elements (221) and a second conductor (222). At least a portion of the third light-transmitting layer (410) may be in contact with the second light-transmitting layer (210). In other words, the third light-transmitting layer (410), the second light-transmitting layer (210), and the first light-transmitting layer (110) may be formed integrally. For example, the edges of the third light-transmitting layer (410), the edges of the second light-transmitting layer (210), and the edges of the first light-transmitting layer (110) may be connected to each other. The second light-emitting device (220) can be more effectively protected between the third light-transmitting layer (410) and the second light-transmitting layer (210).

[0114] The third light-transmitting layer (410) may contain the same material as the second light-transmitting layer (210) and the first light-transmitting layer (110), but is not limited thereto and may contain different materials. When the third light-transmitting layer (410), the second light-transmitting layer (210), and the first light-transmitting layer (110) contain the same material, the bonding strength of the first light-emitting layer (100), the second light-emitting layer (200), and the third light-emitting layer (400) may be increased. When the third light-transmitting layer (410), the second light-transmitting layer (210), and the first light-transmitting layer (110) contain the same material, the interface between the third light-transmitting layer (410) and the second light-transmitting layer (210) comes into contact due to the bonding strength of the same material, and the gap between the interfaces is minimized, thereby minimizing damage to the second light-emitting element (221) and the third light-emitting element (421) caused by moisture penetration. In addition, if the third light-transmitting layer (410), the second light-transmitting layer (210), and the first light-transmitting layer (110) contain the same material, the peel-off phenomenon between the first light-emitting layer (100), the second light-emitting layer (200), and the third light-emitting layer (400) is also minimized, and the reliability of the light-emitting device (1) can be improved.

[0115] The third light-transmitting layer (410) and the second light-transmitting layer (210) may have the same refractive index, but are not limited thereto and may have different refractive indices. Additionally, the third light-transmitting layer (410) and the second light-transmitting layer (210) may have the same light transmittance, but are not limited thereto and may have different light transmittances. For example, the third light-transmitting layer (410) and the second light-transmitting layer (210) may have different light transmittances or different refractive indices so that more light is emitted in either the upward or downward direction of the plurality of second light-emitting elements (221). In other words, the refractive index of the third light-transmitting layer (410) may be formed lower than the refractive index of the second light-transmitting layer (210) so that the light intensity of the light emitted upward from the second light-emitting element (221) is formed to be high. As another example, the third light-transmitting layer (410) and the second light-transmitting layer (210) may have different light transmittances or different refractive indices so that the light intensity of the light emitted upward and downward from the plurality of second light-emitting elements (221) is formed to be the same.

[0116] The third light emitter (420) can generate light to form a third image that overlaps at least a portion of the first image and the second image. The third light emitter (420) can be formed in the shape of a thin film. The third light emitter (420) can be laminated onto the third light-transmitting layer (410). The third image can overlap the first image and the second image to form a three-dimensional image. The third image may be the same image as the first image and the second image. The light density of the third light emitter (420) emitted into the overlapping area where the first image, the second image, and the third image overlap, the light density of the first light emitter (120) emitted into the overlapping area, and the light density of the second light emitter (220) emitted into the overlapping area may be formed differently from each other. In other words, the light density of the third light emitter (420) emitted into the overlapping region can be formed to be smaller than the light density of the first light emitter (120) and the second light emitter (220). Such a third light emitter (420) may include a plurality of third light-emitting elements (421) and a third conductor (422).

[0117] A plurality of third light-emitting elements (421) can generate light. A plurality of third light-emitting elements (421) may be arranged spaced apart from each other in a direction perpendicular to the stacking direction. A plurality of third light-emitting elements (421) may include an N-type semiconductor layer, a P-type semiconductor layer, and an active layer disposed between the N-type semiconductor layer and the P-type semiconductor layer. A plurality of third light-emitting elements (421) may generate light of wavelengths such as red, green, blue, cyan, and orange. Additionally, a plurality of third light-emitting elements (421) may further include a wavelength conversion material for changing the main wavelength. Additionally, a plurality of third light-emitting elements (421) may further include a color filter to change the color of the light.

[0118] Additionally, a plurality of third light-emitting elements (421) may be arranged spaced apart from each other in a direction perpendicular to the stacking direction. For example, a plurality of third light-emitting elements (421) may be arranged in the form of N rows and M columns or a matrix to form an image. For another example, a plurality of third light-emitting elements (421) may be arranged in a diagonal or diamond shape. As yet another example, the spacing between the plurality of third light-emitting elements (421) may be formed differently depending on the shape of the third conductor (422), structure, wiring, etc., thereby reducing the decrease in reliability caused by heat or interference generated from the third conductor (422), wiring, structure, etc.

[0119] The spacing between these multiple third light-emitting elements (421) can be formed to be larger than the width of each of the multiple third light-emitting elements (421). In other words, the spacing between the multiple third light-emitting elements (421) can be wider than the horizontal or vertical width of the third light-emitting element (421) when viewed in the stacking direction. If the spacing between the multiple third light-emitting elements (421) is formed to be wider than the horizontal or vertical width of the third light-emitting element (421), the number of third light-emitting elements (421) can be reduced, thereby reducing costs and increasing the light transmittance of the third light-transmitting layer (410). Additionally, if the horizontal and vertical lengths of the third light-emitting elements (421) are the same or similar, the similarity between the viewing angle in the horizontal direction and the viewing angle in the vertical direction can be increased.

[0120] The width and height of the third light-emitting element (421) may be approximately 500 μm or less, and preferably approximately 200 μm or less. Additionally, the spacing between the plurality of third light-emitting elements (421) may be approximately 100 μm or more. The plurality of second light-emitting elements (221) may emit light of the same series of colors or may emit light of different colors. The interior of the plurality of third light-emitting elements (421) may include sub-pixel elements capable of emitting different main wavelengths. The plurality of third light-emitting elements (421) may each be driven individually, or they may be driven by dividing the area and driving each area separately.

[0121] Additionally, when one of the plurality of third light-emitting elements (421) is projected onto one of the plurality of third light-emitting elements (421) in the stacking direction, it may be positioned so that only a portion of it overlaps with one of the plurality of second light-emitting elements (221). The partially overlapping light-emitting element, which is positioned so that only a portion of the plurality of third light-emitting elements (421) overlaps with the second light-emitting element (221), can emit light to the outer region of the overlap area. Furthermore, the partially overlapping light-emitting element among the plurality of third light-emitting elements (421) may be positioned near the edge of the third light-transmitting layer (410). In other words, the third light-emitting element (421) that irradiates light to the outer region of the overlap area may be positioned closer to the edge of the third light-transmitting layer (410) than the third light-emitting element (421) that irradiates light to the overlap area.

[0122] Additionally, when another of the plurality of third light-emitting elements (421) is projected onto another of the plurality of second light-emitting elements (221) in the stacking direction, it may be positioned so that its edge overlaps with the edge of another of the plurality of second light-emitting elements (221). In other words, another of the plurality of third light-emitting elements (421) may completely overlap with another of the plurality of second light-emitting elements (221). This other of the plurality of third light-emitting elements (421) may irradiate light into the overlapping area.

[0123] When the light-emitting module (10) is viewed from below, any one of the plurality of third light-emitting elements (421) and any one of the plurality of second light-emitting elements (221) may be arranged so that they overlap by more than 50%. When the light-emitting module (10) is viewed from above, any one of the plurality of third light-emitting elements (421) and any one of the plurality of second light-emitting elements (221) may be arranged so that they completely overlap. When the light-emitting module (10) is viewed from the side, any one of the plurality of third light-emitting elements (421) and any one of the plurality of third light-emitting elements (421) may be arranged so that they overlap by more than 50%. Since a sense of depth and spatiality can be imparted to the plurality of images through the arrangement relationship between the plurality of third light-emitting elements (421) and the plurality of second light-emitting elements (221), a three-dimensional image to be realized can be formed.

[0124] The third conductor (422) is electrically connected to a plurality of third light-emitting elements (421) and can supply current to the plurality of third light-emitting elements (421). The third conductor (422) can be electrically connected to an external power source to supply current to the plurality of third light-emitting elements (421). When current is supplied to the plurality of third light-emitting elements (421) by this third conductor (422), the plurality of third light-emitting elements (421) can generate light. The third conductor (422) can be placed between the third light-transmitting layer (410) and the plurality of third light-emitting elements (421). The third conductor (422) may include one or more of iron, copper, tin, gold, silver, aluminum, metal compounds, metal oxides, graphite, graphene, and anisotropic conductive films.

[0125] Additionally, the third conductor (422) may be formed by extending along the direction in which a plurality of third light-emitting elements (421) are arranged. For example, the third conductor (422) may be formed as a thin plate in the form of a mesh consisting of horizontal rows and vertical columns corresponding to the N-row and M-column arrangement of the third light-emitting elements (421). Furthermore, the third conductor (422) may be a TFT electrode on which a thin-film transistor, a data electrode, and a channel control electrode are formed. The design freedom of the light-emitting device (1) can be increased by such a third conductor (422). Additionally, the shape of the third conductor (422) may be formed in various shapes as needed.

[0126] The third conductor (422) may be a series circuit connecting multiple third light-emitting elements (421) in series, or a parallel circuit connecting multiple third light-emitting elements (421) in parallel. Additionally, the third conductor (422) may be a series-parallel circuit connecting multiple third light-emitting elements (421).

[0127] Additionally, the third conductor (422) may include a transistor and a capacitor. This third conductor (422) may be formed to individually send current to a plurality of third light-emitting elements (421) so that each of the plurality of third light-emitting elements (421) is driven by active matrix addressing. Additionally, the third conductor (422) may apply a voltage waveform to a plurality of third light-emitting elements (421) so that a plurality of second light-emitting elements (221) are driven by passive matrix addressing. Additionally, the third conductor (422) may be a wire for a signal to control the driving of a plurality of third light-emitting elements (421).

[0128] The molding layer (300) can be laminated onto the third light-emitting layer (400). In other words, the molding layer (300) can cover a plurality of third light-emitting elements (421) and third conductors (322). For example, the molding layer (300) can be manufactured in a shape that encloses a portion of the third light-emitting element (421). Such a molding layer (300) can improve reliability by increasing the length of the moisture penetration path toward the third light-emitting element (421) to delay moisture penetration. At least one surface of the molding layer (300) can have a higher adhesive strength than the third light-transmitting layer (310).

[0129] Additionally, the molding layer (300) may have a different refractive index from the third light-transmitting layer (310). For example, the molding layer (300) may have a lower transmittance than the third light-transmitting layer (310). For another example, the molding layer (300) may have a higher transmittance than the third light-transmitting layer (310). For yet another example, the molding layer (300) may have a lower refractive index than the third light-emitting element (421) to increase light extraction efficiency.

[0130] The molding layer (300) may contain a material different from the third light-transmitting layer (310) or the same material as the third light-transmitting layer (310). If the molding layer (300) contains the same material as the third light-transmitting layer (410), the bonding strength between the third light-emitting element (420) and the third light-transmitting layer (410) can be increased. Due to this bonding strength between the molding layer (300) and the third light-transmitting layer (410), the interface between the molding layer (300) and the third light-transmitting layer (410) comes into contact, and the gap between the interfaces is minimized, thereby minimizing damage to the third light-emitting element (421) caused by moisture penetration.

[0131] The controller (20) can further control the third light-emitting layer (400). In other words, the controller (20) can drive the first light emitter (120), the second light emitter (220), and the third light emitter (420) simultaneously or individually. The controller (20) can make the magnitude of the current applied to the third light emitter (420), the magnitude of the current applied to the second light emitter (220), and the magnitude of the current applied to the first light emitter (120) different from each other. In other words, the controller (20) can control the current so that the magnitude of the current applied to the first light emitter (120) is greater than the magnitude of the current applied to the second light emitter (220), and the magnitude of the current applied to the second light emitter (220) is greater than the magnitude of the current applied to the third light emitter (420). By this controller (20), the light density of the third light emitter (420) irradiated into the overlapping area by the controller (20) is formed to be lower than the light density of the second light emitter (220) and the first light emitter (120), so that the visibility of the three-dimensional image can be improved.

[0132] Hereinafter, the operation and effect of the light-emitting device (1) according to the second embodiment of the present invention will be described.

[0133] A controller (20) of a light-emitting device (1) according to a second embodiment of the present invention can supply current to a first light-emitting device (120), a second light-emitting device (220), and a third light-emitting device (320) so that light is generated in the first light-emitting device (120), the second light-emitting device (220), and the third light-emitting device (320). The first light-emitting device (120) can form a first image, the second light-emitting device (220) can form a second image that is superimposed on the first image, and the third light-emitting device (320) can form a third image that is superimposed on the first image and the second image. The first image, the second image, and the third image can form a three-dimensional image by superimposing each other. Additionally, the magnitude of the current supplied to the first light-emitting device (120), the second light-emitting device (220), and the third light-emitting device (320) can be formed differently by the controller (20). The first light emitter (120), the second light emitter (220), and the third light emitter (320) can be formed differently from each other by this controller (20).

[0134] Since these first, second, and third images can overlap each other, the visibility of the stereoscopic image can be further increased.

[0135] In addition, since the light density generated in the first light-emitting layer (100), the light density generated in the second light-emitting layer (200), and the light density generated in the second light-emitting layer (200) can be formed differently from each other, the visibility and spatial sense of the three-dimensional image can be further increased.

[0136] Hereinafter, with reference to FIG. 7, a light-emitting device (1) according to a third embodiment of the present invention will be described. In describing the third embodiment, there is a difference in that it further includes a reflective layer (500), and this difference will be explained mainly.

[0137] The reflective layer (500) can reflect light generated from a plurality of light-emitting elements. The reflective layer (500) can be formed in multiple numbers. A plurality of light-emitting elements can be arranged between the plurality of reflective layers (500). Additionally, the plurality of reflective layers (500) can have different transmittances. The plurality of reflective layers (500) may include a first reflective layer (510) and a second reflective layer (520).

[0138] The first reflective layer (510) can reflect light generated from a plurality of light-emitting elements toward the molding layer (300). The first reflective layer (510) may be a total reflection layer. The first reflective layer (510) may be positioned below the first light-emitting element (121), the second light-emitting element (221), and the third light-emitting element (421) to reflect light generated from the first light-emitting element (121), the second light-emitting element (221), and the third light-emitting element (421) upward. As an example, the first reflective layer (510) may be positioned below the first light-transmitting layer (110). As another example, the first reflective layer (510) may be positioned between the first light-emitting element (121) and the first light-transmitting layer (110), but is not limited thereto.

[0139] The second reflective layer (520) can reflect some of the light generated from a plurality of light-emitting elements toward the first reflective layer (510) and transmit other parts of the light generated from the plurality of light-emitting elements. The second reflective layer (520) may be a half-reflective layer. In other words, the second reflective layer (520) is positioned above the first light-emitting element (121), the second light-emitting element (221), and the third light-emitting element (421) to reflect some of the light generated from the first light-emitting element (121), the second light-emitting element (221), and the third light-emitting element (421) downward. For example, the second reflective layer (520) may be laminated to the molding layer (300). As another example, the second reflective layer (520) may be positioned between the molding layer (300) and the third light-emitting element (421), but is not limited thereto.

[0140] Hereinafter, the operation and effect of the light-emitting device (1) according to the third embodiment of the present invention will be described.

[0141] The second reflective layer (520) of the light-emitting device (1) according to the third embodiment can reflect some of the light generated from a plurality of light-emitting elements toward the first reflective layer (510) and transmit other parts. The first reflective layer (510) can reflect the light reflected from the second reflective layer (520) and the light generated from the plurality of light-emitting elements toward the second reflective layer (520).

[0142] Since at least some of the light generated from these multiple light-emitting elements can be reflected multiple times in the first reflective layer (510) and the second reflective layer (520), the three-dimensional effect, perspective, and spatial effect of the three-dimensional image can be improved, and the visibility of the three-dimensional image can be increased.

[0143] Although the embodiments of the present invention have been described above as specific embodiments, they are merely examples and the present invention is not limited thereto, but should be interpreted as having the broadest scope in accordance with the technical concept disclosed in this specification. Those skilled in the art may implement patterns of shapes not specified by combining or substituting the disclosed embodiments, and this also does not deviate from the scope of the present invention. Furthermore, those skilled in the art may easily modify or alter the disclosed embodiments based on this specification, and it is evident that such modifications or alterations also fall within the scope of the rights of the present invention.

Claims

1. A first light-transmitting layer that transmits light; A first light emitter supported on the first light-transmitting layer and generating light to form a first image; A second light-transmitting layer laminated to the first light-emitting device and transmitting light; and A second light emitter supported on the light-transmitting layer and generating light for forming a second image in which at least a portion overlaps with the first image, Light-emitting device.

2. In Paragraph 1, The above-mentioned first light emitter is, A plurality of first light-emitting elements arranged spaced apart from each other in a direction perpendicular to the stacking direction; and It includes a first conductor electrically connected to the plurality of first light-emitting elements, and The above second light emitter is, A plurality of first light-emitting elements arranged spaced apart from each other in a direction perpendicular to the stacking direction; and A second conductor electrically connected to the plurality of first light-emitting elements, Light-emitting device.

3. In Paragraph 2, The plurality of first light-emitting elements and the first conductor are covered by the second light-transmitting layer, Light-emitting device.

4. In Paragraph 2, The spacing between the plurality of first light-emitting elements is greater than the width of each of the plurality of first light-emitting elements, and The spacing between the plurality of second light-emitting elements is greater than the width of each of the plurality of second light-emitting elements. Light-emitting device.

5. In Paragraph 2, A molding layer further comprising a plurality of second light-emitting elements covering the above-mentioned second light-emitting elements Light-emitting device.

6. In Paragraph 5, By the first light emitter and the second light emitter, the relative intensity of light transmitted through the central region of the molding layer is greater than the relative intensity of light transmitted through the edge region of the molding layer. Light-emitting device.

7. In Paragraph 5, The above molding layer, the above first light-transmitting layer, and the above second light-transmitting layer comprise the same material, Light-emitting device.

8. In Paragraph 5, The above molding layer comprises a material different from the first light-transmitting layer and the second light-transmitting layer, Light-emitting device.

9. In Paragraph 5, The above molding layer has a refractive index different from that of the first light-transmitting layer and the second light-transmitting layer, Light-emitting device.

10. In Paragraph 2, One of the plurality of first light-emitting elements above When projected onto any one of the plurality of second light-emitting elements in the stacking direction, arranged so that only a portion overlaps with any one of the plurality of second light-emitting elements, Light-emitting device.

11. In Paragraph 10, Among the plurality of first light-emitting elements mentioned above, another When projected onto another of the plurality of second light-emitting elements in the stacking direction, the edge is arranged to overlap with the edge of the other of the plurality of second light-emitting elements. Light-emitting device.

12. In Paragraph 11, One of the plurality of first light-emitting elements is positioned closer to the edge of the first light-transmitting layer than the other of the plurality of first light-emitting elements, Light-emitting device.

13. In Paragraph 2, One of the plurality of first light-emitting elements above When projected onto any one of the plurality of second light-emitting elements in the stacking direction, arranged so that only a portion overlaps with any one of the plurality of second light-emitting elements, Light-emitting device.

14. In Paragraph 2, The relative intensity of light generated from the plurality of first light-emitting elements and the relative intensity of light generated from the plurality of second light-emitting elements are different from each other. Light-emitting device.

15. In Paragraph 1, The first image and the second image are the same image, Light-emitting device.

16. In Paragraph 1, The edges of the first light-transmitting layer and the second light-transmitting layer are connected to each other and formed integrally. Light-emitting device.

17. In Paragraph 1, A third light-transmitting layer that is laminated to the second light-emitting device and transmits light; and It further includes a third light emitter that is supported by the third light-transmitting layer and generates light to form a third image in which at least a portion overlaps the first image and the second image. The first image, the second image, and the third image are the same image. Light-emitting device.

18. In Paragraph 17, The above third light-transmitting layer, second light-transmitting layer, and first light-transmitting layer have different refractive indices. Light-emitting device.

19. A first light-transmitting layer that transmits light; A first light emitter supported on the first light-transmitting layer and generating light to form a first image; A second light-transmitting layer laminated to the first light-emitting device and transmitting light; and A second light emitter supported by the second light-transmitting layer and generating light to form a second image in which at least a portion overlaps with the first image; and It includes a controller that controls the current applied to the first light emitter and the second light emitter so that light is generated from the first light emitter and the second light emitter, The above controller is, Controlling the magnitude of the current applied to the first light emitter and the magnitude of the current applied to the second light emitter so that they are formed differently from each other, Light-emitting device.

20. A first light-transmitting layer that transmits light; A first light emitter disposed in the first light-transmitting layer and generating light to form a first image; A second light-transmitting layer laminated to the first light-emitting device and transmitting light; and It includes a second light emitter disposed in the second light-transmitting layer and generating light to form a second image in which at least a portion overlaps with the first image, and An overlapping region is formed in the first image and the second image that overlaps with each other, and The light density of the first light emitter irradiated into the overlapping region and the light density of the second light emitter irradiated into the overlapping region are different from each other. Light-emitting device.

Images