Light-emitting device and display device comprising same

Abstract

An aspect of the present invention may provide a light-emitting device comprising: a substrate; a plurality of light-emitting elements including a first light-emitting element and a second light-emitting element disposed on the substrate; and a plurality of refractors disposed on the upper surface of at least one of the plurality of light-emitting elements, wherein the curvature of a first region of a refractor disposed in the first light-emitting element is different from the curvature of a second region of a refractor disposed in the second light-emitting element.

Description

Light-emitting device and display device including the same

[0001] The present invention relates to a light-emitting device and a display device including the same.

[0002] Embodiments of the present invention can provide a light-emitting device capable of efficiently refracting light and a display device including the same.

[0003] Embodiments of the present invention can provide a light-emitting device having a stable structure without damage such as cracking even under heat generation or thermal stress, and a display device including the same.

[0004] Embodiments of the present invention can provide a light-emitting device with improved contrast by minimizing optical interference between light-emitting elements and a display device including the same.

[0005] Embodiments of the present invention can provide a light-emitting device that improves brightness by adjusting the direction of refraction, and a display device including the same.

[0006] Embodiments of the present invention can provide a light-emitting device for a display that can improve color brightness and color reproduction rate.

[0007] Embodiments of the present invention can provide a light-emitting device capable of efficiently refracting light and a display device including the same.

[0008] Embodiments of the present invention can provide a light-emitting device having a stable structure without damage such as cracking even under heat generation or thermal stress, and a display device including the same.

[0009] Embodiments of the present invention can provide a light-emitting device with improved contrast by minimizing optical interference between light-emitting elements and a display device including the same.

[0010] Embodiments of the present invention can provide a light-emitting device that improves brightness by adjusting the direction of refraction, and a display device including the same.

[0011] Embodiments of the present invention can provide a light-emitting device for a display that can improve color brightness and color reproduction rate.

[0012] According to one aspect of the present invention, a light-emitting device may be provided comprising: a substrate; a plurality of light-emitting elements including a first light-emitting element and a second light-emitting element disposed on the substrate; and a plurality of refractors disposed on the upper surface of at least one of the plurality of light-emitting elements, wherein the curvature of a first region of a refractor disposed on the first light-emitting element is different from the curvature of a second region of a refractor disposed on the second light-emitting element.

[0013] Additionally, a light-emitting device may be provided that is configured to allow light generated from the plurality of light-emitting elements to pass through by arranging the plurality of refractors and further includes an optical device that covers the plurality of light-emitting elements.

[0014] Additionally, a light-emitting device may be provided, wherein the first light-emitting element is configured to generate a first light having a first peak wavelength and the second light-emitting element is configured to generate a second light having a second peak wavelength, and the plurality of refractors comprises: a first refractor positioned above the first light-emitting element and formed convexly upward to concentrate the light of the first light-emitting element; and a second refractor positioned above the second light-emitting element and formed convexly upward to concentrate the light of the second light-emitting element.

[0015] In addition, a light-emitting device may be provided in which the radius of curvature of the first refractor is smaller than the radius of curvature of the second refractor.

[0016] In addition, a light-emitting device may be provided in which the center of the radius of curvature of the first refractor is positioned above the center of the radius of curvature of the second refractor.

[0017] Additionally, the plurality of light-emitting elements may further include a third light-emitting element that generates a third light having a third peak wavelength different from the first light-emitting element and the second light-emitting element, and the plurality of refractors may be provided in a light-emitting device in which the refractors are not disposed in a region directly above the third light-emitting element.

[0018] Additionally, a light-emitting device may be provided, wherein the plurality of light-emitting elements further include a third light-emitting element configured to emit light of a different color from the first light-emitting element and the second light-emitting element, and the plurality of refractors further include a third refractor formed convexly upward and positioned above the third light-emitting element to concentrate the light of the third light-emitting element.

[0019] Additionally, a light-emitting device may be provided in which the radius of curvature of the third refractor is greater than the radius of curvature of the first refractor and the radius of curvature of the second refractor, and the radius of curvature of the second refractor is greater than the radius of curvature of the first refractor.

[0020] Additionally, a light-emitting device may be provided in which the center of the radius of curvature of the third refractor is positioned lower than the center of the radius of curvature of the first refractor and the center of the radius of curvature of the second refractor, and the center of the radius of curvature of the second refractor is positioned lower than the center of the radius of curvature of the first refractor.

[0021] Additionally, a light-emitting device may be provided in which the radius of curvature of the first refractor and the radius of curvature of the second refractor are the same, and the radius of curvature of the third refractor is larger than the radius of curvature of the first refractor and the radius of curvature of the second refractor.

[0022] Additionally, a light-emitting device may be provided in which the center of the radius of curvature of the third refractor is positioned lower than the center of the radius of curvature of the first refractor and the center of the radius of curvature of the second refractor.

[0023] In addition, a light-emitting device may be provided in which the height of the third refractor is smaller than the height of the first refractor and the height of the second refractor.

[0024] Additionally, a light-emitting device may be provided, further comprising a first spacer disposed between the first refractor and the first light-emitting element and configured to transmit the first light, and a second spacer disposed between the second refractor and the second light-emitting element and configured to transmit the second light, wherein the center of the radius of curvature of the first refractor is disposed above the first spacer and the center of the radius of curvature of the second refractor is disposed above the second spacer.

[0025] Additionally, a light-emitting device may be provided in which the first refractor, the second refractor, and the third refractor are spaced apart from each other in a horizontal direction, and the distance between the first refractor and the second refractor is the same as the distance between the second refractor and the second refractor.

[0026] Additionally, a light-emitting device may be provided in which the center of the radius of curvature of the third refractor is positioned at the same or higher than the center of the radius of curvature of the first refractor and the center of the radius of curvature of the second refractor.

[0027] Additionally, a light-emitting device may be provided in which the height of the third refractor is equal to or greater than the height of the first refractor and the second refractor.

[0028] Additionally, a light-emitting device may be provided in which the first refractor, the second refractor, and the third refractor are spaced apart from each other in a horizontal direction, and the distance between the first refractor and the second refractor is greater than the distance between the second refractor and the second refractor.

[0029] According to one aspect of the present invention, a light-emitting device may be provided, further comprising a light blocker for blocking light generated from a plurality of light-emitting elements, wherein the light blocker is disposed between the plurality of light-emitting elements and on the outside of the plurality of light-emitting elements.

[0030] According to one aspect of the present invention, a light-emitting device may be provided, comprising: a plurality of light-emitting elements configured to generate light; a plurality of lower refractors disposed above the plurality of light-emitting elements to collect light generated from at least some of the plurality; and a plurality of upper refractors configured to collect light transmitted through the plurality of lower refractors and disposed above the plurality of lower refractors, wherein the curvature of any one of the plurality of lower refractors and the plurality of upper refractors is different from the curvature of another of the plurality of lower refractors and the plurality of upper refractors.

[0031] According to one aspect of the present invention, a display device may be provided comprising: a light-emitting device; and a circuit board on which the light-emitting device is arranged, wherein the light-emitting device comprises a plurality of light-emitting elements configured to generate light; and a plurality of refractors configured to collect light generated from at least some of the plurality of light-emitting elements, and wherein the curvature of one of the plurality of refractors is different from the curvature of another of the plurality of refractors.

[0032] The light-emitting device of a display device according to one embodiment of the present invention can efficiently refract light, so it has the effect of blocking light interference.

[0033] Embodiments of the present invention may have the effect of having a stable structure without damage such as cracks even under heat generation or thermal stress.

[0034] Embodiments of the present invention may have the effect of improving contrast by minimizing light interference between light-emitting elements.

[0035] Embodiments of the present invention may have the effect of improving brightness by adjusting the direction of refraction.

[0036] The embodiments of the present invention may have the effect of increasing extraction efficiency and having high lightness.

[0037] The embodiments of the present invention may have the effect of improving color brightness and color reproduction rate.

[0038] FIG. 1 is an exploded perspective view of a display device according to one embodiment of the present invention.

[0039] Figure 2 is a cross-sectional view of the display device of Figure 1.

[0040] FIG. 3 is an exploded perspective view of a light-emitting device of a display device according to one embodiment of the present invention.

[0041] FIG. 4 is a drawing showing a plurality of light-emitting elements and a plurality of refractors of a light-emitting device according to one embodiment of the present invention.

[0042] FIG. 5 is a drawing showing that a plurality of refractors are not arranged in the area directly above the third light-emitting element of a light-emitting device according to one embodiment of the present invention.

[0043] FIG. 6 is a drawing showing a plurality of light-emitting elements and a plurality of refractors of a light-emitting device according to one embodiment of the present invention.

[0044] FIG. 7 is a drawing showing a plurality of light-emitting elements and a plurality of refractors of a light-emitting device according to one embodiment of the present invention.

[0045] FIG. 8 is a drawing showing the appearance of a spacer of a light-emitting device according to one embodiment of the present invention.

[0046] FIG. 9 is a first example of a plurality of refractors and light blockers of a light-emitting device according to one embodiment of the present invention.

[0047] FIG. 10 is a second example of a plurality of refractors and light blockers of a light-emitting device according to one embodiment of the present invention.

[0048] FIG. 11 is a third example of a plurality of refractors and light blockers of a light-emitting device according to one embodiment of the present invention.

[0049] FIG. 12 is a drawing showing the appearance of an auxiliary refractometer of a light-emitting device according to one embodiment of the present invention.

[0050] FIG. 13 is a drawing showing the appearance of a plurality of lower refractors and a plurality of upper refractors of a light-emitting device according to one embodiment of the present invention.

[0051] FIG. 14 is a drawing showing the appearance of a light-emitting device according to one embodiment of the present invention.

[0052] Figure 15 is a drawing showing the light-emitting device of Figure 14 viewed from above.

[0053] Figure 16 is a drawing showing an enlarged view of the refractometer of the light-emitting device of Figure 14.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] A light-emitting device (10) and a display device (1) including the same according to one embodiment of the present invention will be described below.

[0065] Referring to FIGS. 1 and 2, a display device (1) according to one embodiment of the present invention can display characters, symbols, images, or video. Additionally, the display device (1) can be mounted on a vehicle. Such a display device (1) may be included in a taillight, headlight, rear lamp, tail lamp, etc. Additionally, the display device (1) mounted on the vehicle can emit light of a red light spectrum, light of a yellow light spectrum, or light of a white light spectrum to display information such as stop signals or characters to the outside. Additionally, the display device (1) can reduce light interference between a plurality of light-emitting devices (10) to minimize interference between driving areas, thereby having a distinct contrast ratio and realizing a high-quality display device with distinct contrast. The display device (1) may include a light-emitting device (10), a circuit board (20), a cover (30), and an optical sheet (40).

[0066] The cover (30) has a structure with an open top surface and can house a light-emitting device (10), a circuit board (20), and an optical sheet (40) inside. The cover (30) may contain metal and can protect the interior from the external environment.

[0067] The light-emitting module may include a circuit board (20) and at least one light-emitting device (10). The light-emitting module of the present embodiment may have the same features as the light-emitting device (10) described later in FIGS. 3 to 15. The light-emitting module of the display device (1) according to one embodiment may be composed of the light-emitting devices described through FIGS. 3 to 15 or may be formed in various ways by a combination of their components.

[0068] The optical sheet (40) may include at least one of a diffusion sheet, a light-concentrating sheet, and a protective sheet. The optical sheets (40) may each include one or multiple diffusion sheets, light-concentrating sheets, and protective sheets, and may include at least one of a diffusion sheet, light-concentrating sheet, and protective sheet in a number or in a number. For example, the optical sheet (40) may be composed of one diffusion sheet and two light-concentrating sheets, or two diffusion sheets and one light-concentrating sheet. The optical sheet (40) may be arranged parallel to the circuit board (20). This allows for the implementation of an efficient surface light source.

[0069] Referring further to FIG. 3, the light-emitting device (10) can generate light. The light-emitting device (10) may be formed in multiple units and placed in at least one area of ​​the circuit board (20). Additionally, the multiple light-emitting devices (10) may be electrically connected to an electrical circuit placed on the circuit board (20). The electrical circuit may be formed in a multilayer structure and may be formed with different thicknesses depending on the area as needed. The multiple light-emitting devices (10) may be arranged adjacent to each other to generate light. For example, the multiple light-emitting devices (10) may be arranged in N rows and M columns to generate light. In other words, the multiple light-emitting devices (10) may be arranged in N×M matrices to generate light. The number of rows N and the number of columns M of the multiple light-emitting devices (10) may be the same or different. The number of rows N may be smaller than the number of columns M. The number of N rows relative to M columns may be 1.2 to 1.8 times. This allows for a reduction in light deviation in the long and short axis regions of the display device (1). The N×M matrix of the multiple light-emitting devices (10) may be proportional to the magnification of the display device (1). Additionally, each light-emitting device (10) can be individually driven for each region to control brightness or control the light-emitting region. Such light-emitting devices (10) may include a light-emitting element (100), a reflector (200), and an optical device (300). The reflector (200) is arranged in an N×M matrix corresponding to the region of the light-emitting element (100) to control the light generated from each light-emitting element (100). Each of the multiple light-emitting devices (10) may form a dimming zone, a pixel, or a sub-pixel.

[0070] Referring further to FIG. 4, the light-emitting element (100) can emit light. The total thickness of the light-emitting element (100) may be in the range of 5 µm to 200 µm. At least two adjacent light-emitting elements (100) may have different thicknesses. In this case, the difference in thickness may be 10% to 20%. Through this, the direction of refraction between the elements can be controlled to minimize luminance interference. Additionally, the light-emitting element (100) may include one or more of aluminum gallium arsenide (AlGaAs), gallium arsenide phosphide (GaAsP), aluminum gallium indium phosphide (AlGaInP), gallium phosphide (GaP), indium gallium nitride (InGaN), aluminum gallium phosphide (AlGaP), and zinc selenide (ZnSe). The light-emitting element (100) may include a first conductivity semiconductor layer, a second conductivity semiconductor layer, and an active layer.

[0071] The first conductivity-type semiconductor layer may be connected to the thermal conductor 1-1 described below. The first conductivity-type semiconductor layer may contain n-type impurities (e.g., Si, Ge, Sn), and in this case, the first conductivity-type semiconductor layer may be an n-type semiconductor layer. However, this is merely an example, and the first conductivity-type semiconductor layer may contain p-type impurities.

[0072] The active layer can be stacked on the first conductivity semiconductor layer. For example, the active layer can be located between the first conductivity semiconductor layer and the second conductivity semiconductor layer.

[0073] The second conductivity semiconductor layer may be laminated to the active layer and electrically connected to the first and second thermal conductors. The second conductivity semiconductor layer may contain p-type impurities (e.g., Mg, Sr, Ba). In this case, the second conductivity semiconductor layer may be a p-type semiconductor layer. However, this is merely an example, and the second conductivity semiconductor layer may contain n-type impurities.

[0074] The light-emitting element (100) is electrically connected to the electrical circuit of the circuit board (20) and can generate light by receiving electricity from the outside through the electrical circuit. The width of the light-emitting element (100) may be less than or equal to the width of the bottom of the refractor (200), and the light generated from the light-emitting element (100) may sufficiently enter the refractor (200) to increase the light extraction efficiency. At this time, the width of the bottom of the refractor (200) may be at least 1.1 times greater than the width of the light-emitting element (100). The height of the light-emitting element (100) may be smaller than the height of the optical device (300). The height of the optical device (300) may be at least 1.1 times the height of the light-emitting element (100), and the angle of the emitted light can be adjusted by sufficiently securing the length of the light refraction. In addition, the light-emitting element (100) may be formed in multiple units. A plurality of light-emitting elements (100) may be spaced apart from each other along the upper surface of a circuit board (20), and accordingly, refractors (200) may also be spaced apart from each other. At this time, the spacing between the light-emitting elements (100) may be greater than the spacing between the refractors (200). This can reduce optical interference between the spaced-apart light-emitting elements (100). At this time, the difference between the spacing between the light-emitting elements (100) and the spacing between the refractors (200) may be 2% to 20%. If the difference in spacing is greater than this range, the optical uniformity of the light-emitting device may decrease, and if it is smaller than this range, optical interference may occur.

[0075] A plurality of light-emitting elements (100) may have different directional angles. A plurality of light-emitting elements (100) may include a first light-emitting element (110), a second light-emitting element (120), and a third light-emitting element (130).

[0076] The first light-emitting element (110), the second light-emitting element (120), and the third light-emitting element (130) may have similar wavelengths. In this case, the difference in peak wavelengths between the first to third light-emitting elements (130) may be less than 2 nm. This allows for increased color brightness. Additionally, the difference in full width at half maximum based on the peak wavelengths of the first to third light-emitting elements (130) may be less than 5 nm. This allows for reduced differences in visual sensitivity and improved display quality.

[0077] In addition, the first light-emitting element (110), the second light-emitting element (120), and the third light-emitting element (130) can generate light having different peak wavelengths. For example, the first light-emitting element (110) can generate blue light having a peak wavelength at 400 nm to 490 nm, the second light-emitting element (120) can generate green light having a peak wavelength at 490 nm to 570 nm, and the third light-emitting element (130) can generate red light having a peak wavelength at 600 nm to 750 nm. The first light-emitting element (110) can be configured to generate first light having a first peak wavelength, the second light-emitting element (120) can be configured to generate second light having a second peak wavelength, and the third light-emitting element (130) can be configured to generate third light having a third peak wavelength.

[0078] With these first light-emitting element (110), second light-emitting element (120) and third light-emitting element (130), the light-emitting device (10) can form blue, green, and red light as well as white light.

[0079] When arranged in the order of a first light-emitting element (110), a second light-emitting element (120), and a third light-emitting element (130), the difference between the peak wavelength of an adjacent first light-emitting element (110) and the peak wavelength of a second light-emitting element (120) may be greater than the difference between the peak wavelength of an adjacent second light-emitting element (120) and the peak wavelength of a third light-emitting element (130). The difference between the peak wavelength of the first light-emitting element (110) and the peak wavelength of the second light-emitting element (120) may be 90 nm to 120 nm. The difference between the peak wavelength of the second light-emitting element (120) and the peak wavelength of the third light-emitting element (130) may be 40 nm to 65 nm. The difference between the peak wavelength of the first light-emitting element (110) and the peak wavelength of the second light-emitting element (120) may be 1.5 to 2.5 times longer than the difference between the peak wavelength of the second light-emitting element (120) and the peak wavelength of the third light-emitting element (130). This can increase the clarity of distinction for each color and improve color brightness and color reproduction rate. Additionally, the first light-emitting element (110), the second light-emitting element (120), and the third light-emitting element (130) may have a dominant wavelength different from the peak wavelength. This allows for improved light output by securing more light output while appearing as the same color. At this time, the difference between the peak wavelength and the dominant wavelength may vary for each light-emitting element. The peak wavelength of the first light-emitting element (110) may be longer than the dominant wavelength. For example, the peak wavelength of the first light-emitting element (110) may be 5 nm to 10 nm longer than the dominant wavelength. This allows for securing light intensity while enhancing the visual effect. Additionally, the peak wavelength of the second light-emitting element (120) may be shorter than the frequency. For example, the peak wavelength of the second light-emitting element (120) may be 5 nm to 10 nm shorter than the frequency. This allows for securing light intensity while enhancing the visual effect. Additionally, the peak wavelength of the third light-emitting element (130) may be shorter than the frequency. For example, the peak wavelength of the third light-emitting element (130) may be 1 nm to 8 nm shorter than the frequency.This allows for securing light intensity while enhancing the visual effect. The difference in length between the peak wavelength and the frequency of the third light-emitting element (130) may be smaller than the difference in length between the peak wavelength and the frequency of the first light-emitting element (110). Alternatively, the difference in length between the peak wavelength and the frequency of the third light-emitting element (130) may be smaller than the difference in length between the peak wavelength and the frequency of the second light-emitting element (120). Through this, the difference in visual effect of short-wavelength light, which has relatively low visual sensitivity, can be corrected to improve color reproduction. Additionally, the distance between the first light-emitting element (110), the second light-emitting element (120), and the third light-emitting element (130) may differ from one another. The distance between the first light-emitting element (110) and the second light-emitting element (120), and the distance between the second light-emitting element (120) and the third light-emitting element (130) may differ from one another. Through this, the light uniformity between the elements can be improved.

[0080] The refractor (200) can concentrate light generated from the light-emitting element (100). The refractor (200) may be positioned above the light-emitting element (100). The refractor (200) may have an upwardly convex shape, but is not limited thereto, and may also have a concave shape. The refractor (200) can improve the brightness of the light generated from the light-emitting element (100). The directional angle of the light transmitted through the refractor (200) may be smaller than the directional angle of the light generated from the light-emitting element (100). For example, the refractor (200) can narrow the directional angle of the light generated from the light-emitting element (100) to 4 / 5 or less and emit it outward. The directional angle of the light generated from the light-emitting element (100) and the directional angle of the light emitted through the refractor (200) may differ by more than 20 degrees. The refractor (200) can be formed integrally with the optical device (300), and when manufactured integrally, there is no interface, so light absorption at the interface is reduced, thereby increasing the light extraction efficiency. In addition, the refractor (200) and the optical device (300) can be formed from materials with the same refractive index, and total reflection of the directional angle due to the difference in refractive index can be reduced. For example, the refractor (200) can be formed from silicone together with the optical device (300), but is not limited thereto, and can be formed from various materials with light transparency such as epoxy, glass, and sapphire. The width of the bottom of the refractor (200) can be formed to be greater than the width of the light-emitting element (100). The height of the refractor (200) can be greater than the height of the light-emitting element (100). Additionally, the edges of the refractor (200) may be rounded to have a curved shape in at least one area, thereby reducing corner cohesive stress and reducing physical damage to the refractor (200). The curvature of the rounded edges of the refractor (200) may be greater than the radius of curvature of the center of the refractor (200). This allows for the corner cohesive stress to be reduced efficiently.

[0081] The refractors (200) may be formed in multiple numbers and arranged in the direction in which the multiple light-emitting elements (100) are arranged. The multiple refractors (200) may be spaced apart from each other at equal distances, but are not limited thereto. For example, the spacing distance of some of the multiple refractors (200) may be formed differently from the spacing distance of other of the multiple refractors (200). Through this, the light profiles of the light-emitting elements (100) having different light profiles can be adjusted to be similar. In addition, each of the multiple refractors (200) may be placed above the multiple light-emitting elements (100) to collect light generated from at least some of the multiple light-emitting elements (100). By these multiple refractors (200), the light generated from the multiple light-emitting elements (100) can be efficiently emitted to the outside without total reflection. A plurality of refractors (200) may include a first refractor (210), a second refractor (220), and a third refractor (230).

[0082] The first refractor (210) may be positioned above the first light-emitting element (110) and formed convexly in one direction to concentrate the light of the first light-emitting element (110). The first light-emitting element (110) may be positioned so as to be located inside the first refractor (210) when projected toward the first refractor (210). Additionally, the first refractor (210) may be positioned above the optical device (300). By this first refractor (210), the directional angle of the first light-emitting element (110) may be reduced. For example, the directional angle of the first light-emitting element (110) when the first refractor (210) is removed and the directional angle of the first light-emitting element (110) formed by the first refractor (210) may differ by a predetermined first angle. The first angle may be larger than the second and third angles described later.

[0083] Additionally, when the directional angle of the first light-emitting element (110) is greater than the directional angle of the second light-emitting element (120) or the third light-emitting element (130), the radius of curvature (R1) of the first refractor (210) may be smaller than the radius of curvature (R2) of the second refractor (220) and the radius of curvature (R3) of the third refractor (230). Through this, the directional angle of the first light-emitting element (110), which has a wide directional angle, can be adjusted to be similar to the directional angle of the second and third light-emitting elements (120, 130). This allows for the improvement of the quality of the light-emitting device by increasing brightness uniformity. At least some of the curvature of the first region of the first refractor (210), the curvature of the second region of the second refractor (220), and the curvature of the third region of the third refractor (230) may be formed differently from each other.

[0084] Additionally, the center of the radius of curvature (R1) of the first refractor (210) may be positioned above the center of the radius of curvature (R2) of the second refractor (220) or the center of the radius of curvature (R3) of the third refractor (230), thereby sufficiently securing the light refraction path to increase brightness uniformity and improve the quality of the light-emitting device.

[0085] Additionally, the width (w1) of the lower surface of the first refractor (210) may be formed to be smaller than the width (w2) of the lower surface of the second refractor (220) or the width (w3) of the lower surface of the third refractor (230). By reducing the light intended to be emitted to the side, the uniformity of brightness can be increased, thereby improving the quality of the light-emitting device.

[0086] The height (h1) of the first refractor (210) may be greater than the height (h2) of the second refractor (220) or the height (h3) of the third refractor (230), and the quality of the light-emitting device can be improved by sufficiently securing the light refraction path and increasing the uniformity of brightness.

[0087] The second refractor (220) may be positioned above the second light-emitting element (120) and formed convexly in one direction to concentrate light from the second light-emitting element (120). The second light-emitting element (120) may be positioned so as to be located inside the second refractor (220) when projected toward the second refractor (220). Additionally, the second refractor (220) may be positioned above the optical device (300). By this second refractor (220), the directional angle of the second light-emitting element (120) may be reduced. For example, the directional angle of the second light-emitting element (120) when the second refractor (220) is removed and the directional angle of the second light-emitting element (120) formed by the second refractor (220) may differ by a predetermined second angle. The second angle may be greater than the third angle.

[0088] Additionally, when the directional angle of the second light-emitting element (120) is smaller than the directional angle of the first light-emitting element (110) or larger than the directional angle of the third light-emitting element (130), the radius of curvature (R2) of the second refractor (220) may be larger than the radius of curvature (R1) of the first refractor (210) and smaller than the radius of curvature (R3) of the third refractor (230), thereby allowing the directional angles of the first light-emitting element (110), the second light-emitting element (120), and the third light-emitting element (130) to be adjusted to be equal. Additionally, the center of the radius of curvature (R2) of the second refractor (220) may be positioned lower than the center of the radius of curvature (R1) of the first refractor (210) and higher than the center of the radius of curvature (R3) of the third refractor (230). Through this, the light travel path can be optimized and the brightness uniformity can be increased to improve the quality of the light-emitting device. Additionally, the width (w2) of the lower surface of the second refractor (220) can be formed to be larger than the width (w1) of the lower surface of the first refractor (210) and smaller than the width (w3) of the lower surface of the third refractor (230), and the emission angle can be adjusted by controlling the travel path of the side light of the second light-emitting element (120). The height (h2) of the second refractor (220) can be smaller than the height (h1) of the first refractor (210) and larger than the height (h3) of the third refractor (230), and the emission angle can be optimized by securing the light travel path.

[0089] A third refractor (230) may be positioned above the third light-emitting element (130) and formed convexly in one direction to concentrate light from the third light-emitting element (130). The third light-emitting element (130) may be positioned so as to be located inside the third refractor (230) when projected toward the third refractor (230). Additionally, the third refractor (230) may be positioned above the optical device (300). By this third refractor (230), the directional angle of the third light-emitting element (130) may be reduced. For example, the directional angle of the third light-emitting element (130) when the third refractor (230) is removed and the directional angle of the third light-emitting element (130) formed by the third refractor (230) may differ by a predetermined third angle. The third angle may be smaller than the first angle and the second angle.

[0090] Additionally, when the directional angle of the third light-emitting element (130) is smaller than the directional angle of the first light-emitting element (110) or the second light-emitting element (120), the radius of curvature (R3) of the third refractor (220) may be larger than the radius of curvature (R1) of the first refractor (210) and the radius of curvature (R2) of the second refractor (220). Furthermore, the center of the radius of curvature (R3) of the third refractor (230) may be positioned lower than the center of the radius of curvature (R1) of the first refractor (210) and the center of the radius of curvature (R2) of the second refractor (220). For example, the width (w3) of the lower surface of the third refractor (220) may be formed to be larger than the width (w1) of the lower surface of the first refractor (210) and the width (w2) of the lower surface of the second refractor (220). The height (h3) of this third refractor (220) may be smaller than the height (h1) of the first refractor (210) and the height (h2) of the second refractor (220), and the emitted light can be adjusted by controlling the refraction distance of the light. Through this, the quality of the light-emitting device can be improved by increasing the uniformity of brightness.

[0091] Additionally, the separation distance (d1) between the first refractor (210) and the second refractor (220) can be formed to be almost similar to the separation distance (d2) between the second refractor (220) and the second refractor (220), thereby enabling the implementation of a light-emitting device with uniform pixel spacing when viewed from the top surface. At this time, the difference between the separation distance (d1) and the separation distance (d2) may be less than 10%.

[0092] The optical device (300) is formed to allow light generated from a plurality of light-emitting elements (100) to pass through and may be a molding that covers the plurality of light-emitting elements (100). Additionally, a plurality of refractors (200) may be arranged on one side of the optical device (300). Such an optical device (300) may be formed integrally with the plurality of refractors (200). For example, the optical device (300) may be formed from the same material as the plurality of refractors (200). Thus, it is possible to prevent delamination between the plurality of refractors (200) and the optical device (300) due to heat generated from the light-emitting elements (100). However, this is not necessarily limited to this, and depending on the light profile to be implemented, the plurality of refractors (200) and the optical device (300) may be formed from different materials, and may be formed from materials having different refractive indices to control the refraction angle. For example, the refractor (200) may be made of a different material from the optical device (300) so that its refractive index is higher than that of the optical device (300). This can lower the difficulty of the design. Additionally, the optical device (300) may be formed in multiple units and spaced apart from each other. The height of the optical device (300) may be greater than the height of one or more of the light-emitting element (100) and the refractor (200). This allows for sufficient securing of the light path of the light-emitting element (100), thereby increasing brightness uniformity and improving the quality of the light-emitting device. Furthermore, the light transmittance of the optical device (300) may have a different light transmittance than that of the refractor (200). For example, the light transmittance of the optical device (300) may be lower than that of the refractor (200). This allows for an increase in the amount of light extracted through the refractor (200), thereby improving brightness. At this time, the difference in transmittance between the optical device (300) and the refractometer (200) may be 10% or more. This allows the path of light to be easily adjusted.

[0093] An electrical circuit may be placed on the circuit board (20). A plurality of light-emitting devices (10) may be placed on the circuit board (20) so as to be connected to the electrical circuit. The electrical circuit of the circuit board (20) may supply electricity to a plurality of light-emitting elements (100) of each of the plurality of light-emitting devices (10). For example, the circuit board (20) may be a printed circuit board (PCB) substrate on which the electrical circuit is printed. The circuit board (20) may be referred to as a substrate. Additionally, the circuit board (20) may be a thin-film transistor (TFT) backplane that forms a transistor circuit in which the gate voltage is adjusted on a thin film to control the flow of current by moving electrons or holes from the source to the drain through an active layer.

[0094] The cover (30) can support the circuit board (20) and protect the circuit board (20) and components from the external environment. Additionally, the cover (30) may include a high-density material with high thermal conductivity to improve the reliability of the display device (1). The cover (30) can protect the light-emitting device (10), the circuit board (20), and the optical sheet (40) from the external environment and may have a higher hardness than the adjacent optical sheet (40).

[0095] An optical sheet (40) is positioned on the upper side of a circuit board (20) to diffuse and adjust light generated from a plurality of light-emitting devices (10). The optical sheet (40) may include at least one of a diffusion sheet, a polarization sheet, or a color conversion sheet. The optical sheet (40) may additionally include a diffusion sheet for light diffusion, a prism sheet for increasing light efficiency, etc.

[0096] Hereinafter, with reference to FIG. 5, a light-emitting device (10) and a display device (1) including the same according to an embodiment of the present invention will be described. Compared to the above-described embodiment, there is a difference in that at least one of the plurality of refractors (200) does not concentrate light, and this difference will be explained mainly.

[0097] Multiple refractors (200) may not be placed in the area directly above the third light-emitting element (130). For example, each of the multiple refractors (200) may be placed only in the area directly above the first light-emitting element (110) and the second light-emitting element (120). In other words, a refractor (200) having curvature may not be placed in one area of ​​the third light-emitting element. Furthermore, the difference in the directional angle of the light-emitting element (100) depending on the presence or absence of the refractor (200) may be formed least in the third light-emitting element (130), and since the third angle, which is the difference in directional angle depending on the presence or absence of the refractor of the third light-emitting element (130), may be smaller than the first angle and the second angle, the light of the third light-emitting element (130) can be efficiently emitted to the outside even if it is not concentrated by the refractor (200) on the upper side of the third light-emitting element (130). At this time, the directional angle of the third light-emitting element (130) may be smaller than that of the first light-emitting element (110) and the second light-emitting element (120). Additionally, since the refractometer (200) is not positioned above the third light-emitting element (130) which has the smallest directional angle, the light emission profile of the third light-emitting element (130) can be improved, thereby increasing brightness uniformity and improving the quality of the light-emitting device (10). At this time, a portion of the optical device (300) positioned above the third light-emitting element (130) may have roughness. For example, a portion of the optical device (300) positioned above the third light-emitting element (130) may include irregularities, grooves, etc. Through this, the light extraction efficiency of the third light-emitting element (130) can be improved.

[0098] Hereinafter, with reference to FIG. 6, a light-emitting device (10) according to one embodiment of the present invention and a display device (1) including the same will be described.

[0099] Compared to the embodiments described above, there is a difference in that the radius of curvature (R1) of the first refractor (210) and the radius of curvature (R2) of the second refractor (220) are the same but may be smaller than the radius of curvature (R3) of the third refractor (230), and this difference will be explained mainly.

[0100] The curvature of the first refractor (210) and the curvature of the second refractor (220) can be formed to be the same. The height (h1) of the first refractor (210) and the height (h2) of the second refractor (220) can be formed to be the same. Additionally, the width (w1) of the lower surface of the first refractor (210) and the width (w2) of the lower surface of the second refractor (220) can be formed to be the same.

[0101] The curvature of the third refractor (230) may be smaller than the curvature of the first refractor (210) and the curvature of the second refractor (220), and the path of light emitted from the third light-emitting element (130) may be bent less. The radius of curvature (R3) of the third refractor (230) may be formed to be larger than the radius of curvature (R1) of the first refractor (210) and the radius of curvature (R2) of the second refractor (220). Additionally, the center of the radius of curvature (R3) of the third refractor (230) may be positioned lower than the center of the radius of curvature (R1) of the first refractor (210) and the center of the radius of curvature (R2) of the second refractor (220), so that even with a large radius of curvature, it can be designed so as not to encroach upon the areas of the first refractor (210) and the second refractor (220). Additionally, the width (w3) of the lower surface of the third refractor (230) can be formed to be longer than the width (w1) of the lower surface of the first refractor (210) and the width (w2) of the lower surface of the second refractor (220).

[0102] Additionally, the separation distance (d1) between the first refractor (210) and the second refractor (220) may be substantially the same as the separation distance (d2) between the second refractor (220) and the third refractor (230), and light uniformity may be improved by having equal spacing in the pixel area. At this time, the difference between the separation distance (d1) and the separation distance (d2) may be less than 10%.

[0103] Hereinafter, with reference to FIG. 7, a light-emitting device (10) and a display device (1) including the same according to an embodiment of the present invention will be described. Compared to the embodiments described above, there is a difference in that the height (h3) of the third refractor (230) can be formed to be greater than the height (h1) of the first refractor (210) and the height (h2) of the second refractor (220), and this difference will be explained mainly.

[0104] The curvature of the first refractor (210) and the curvature of the second refractor (220) can be formed to be the same. The height (h1) of the first refractor (210) and the height (h2) of the second refractor (220) can be formed to be the same. In addition, the width (w1) of the lower surface of the first refractor (210) and the width (w2) of the lower surface of the second refractor (220) can be formed to be the same. At this time, the first light-emitting element (110) and the second light-emitting element (120) can have similar directional angles. In addition, the directional angle of the emitted light from the first refractor (210) and the second refractor (220) can be similar. In addition, the first angle, which is the difference in directional angle between the first refractor (210) and the first light-emitting element (110), and the second angle, which is the difference in directional angle between the second refractor (220) and the second light-emitting element (120), may be similar to each other.

[0105] The curvature of the third refractor (230) may be smaller than the curvature of the first refractor (210) and the curvature of the second refractor (220). The radius of curvature (R3) of the third refractor (230) may be formed to be larger than the radius of curvature (R1) of the first refractor (210) and the radius of curvature (R2) of the second refractor (220), thereby forming a third angle between the third refractor (230) and the third light-emitting element (130). The third angle may be smaller than the first angle, which is the difference in the angle between the first refractor (210) and the first light-emitting element (110), and the second angle, which is the difference in the angle between the second refractor (220) and the second light-emitting element (120). Additionally, the center of the radius of curvature (R3) of the third refractor (230) can be positioned at a height similar to the center of the radius of curvature (R1) of the first refractor (210) and the center of the radius of curvature (R2) of the second refractor (220), and can be positioned at the same location as the multiple light-emitting elements (100) or on the upper surface to increase light extraction efficiency. Furthermore, the width (w3) of the lower surface of the third refractor (230) can be formed to be longer than the width (w1) of the lower surface of the first refractor (210) and the width (w2) of the lower surface of the second refractor (220), thereby expanding the light emission area.

[0106] Additionally, the separation distance (d1) between the first refractor (210) and the second refractor (220) may be formed differently from the separation distance (d2) between the second refractor (220) and the third refractor (230). For example, the separation distance (d1) between the first refractor (210) and the second refractor (220) may be formed to be larger than the separation distance (d2) between the second refractor (220) and the third refractor (230), thereby reducing optical interference between the first refractor (210) and the second refractor (220), which have the same beam angle, compared to the third refractor (230), which has a different beam angle.

[0107] Hereinafter, with reference to FIG. 8, a light-emitting device (10) and a display device (1) including the same according to an embodiment of the present invention will be described. Compared to the embodiments described above, there is a difference in that a plurality of spacers (400) may be additionally included, and this difference will be explained mainly.

[0108] A plurality of spacers (400) are placed between a plurality of refractors (200) and optical devices (300) to allow light to pass through. The plurality of spacers (400) may be formed integrally with the plurality of refractors (200) and optical devices (300). Such spacers (400) can increase structural reliability by reducing delamination between the refractors (200) and optical devices (300). For example, the plurality of spacers (400), the plurality of refractors (200), and the optical devices (300) may be formed of the same material, thereby reducing the number of open surfaces and increasing structural stability. The plurality of spacers (400) may include a first spacer (410) and a second spacer (420).

[0109] The first spacer (410) is positioned between the first refractor (210) and the first light-emitting element (110) to refract light from the first light-emitting element (110). The width (s1) of the first spacer (410) may be equal to the width (w1) of the lower surface of the first refractor (210). The center of the radius of curvature (R1) of the first refractor (210) may be positioned on one side of the first spacer (410) or above it, thereby extending the light refraction path and efficiently narrowing the emission angle.

[0110] The second spacer (420) is positioned between the second refractor (220) and the second light-emitting element (120) so that light from the second light-emitting element (120) can be refracted. The width (s2) of the second spacer (420) may be the same as the width (w2) of the lower surface of the second refractor (220). The center of the radius of curvature (R2) of the second refractor (220) may be positioned on one side of the second spacer (420) or above it, thereby extending the light refraction path and efficiently narrowing the emission angle.

[0111] The spacing distance (d1) between the first spacer (410) and the second spacer (420) and the spacing distance (d2) between the second spacer (420) and the third refractor (230) may be substantially the same, thereby allowing the pixel spacing to appear similar when viewed from the top surface. The difference between the spacing distance (d1) and the spacing distance (d2) may be less than 10%.

[0112] Hereinafter, with reference to FIGS. 9 to 11, a light-emitting device (10) and a display device (1) including the same according to an embodiment of the present invention will be described. Compared to the embodiments described above, there is a difference in that a light blocker (500) may be further included, and this difference will be explained mainly.

[0113] The light blocker (500) can block or reflect light. To efficiently block light, the light blocker (500) may contain fine particles such as carbon, titanium dioxide (TiO2), barium sulfate (BaSO4), silica, zirconium dioxide (ZrO2), alumina (Al2O3), carbon black, iron oxide (Fe2O3), NiO, CoO, Nd2O3, Sm2O3, etc. Additionally, it may contain pigments such as carbon black for light absorption. The light blocker (500) may be placed between a plurality of light-emitting elements (100) and on the outside of a plurality of light-emitting elements (100). The height of the light blocker (500) may be higher than the height of the plurality of light-emitting elements (100), and light interference between the plurality of light-emitting elements can be reduced to enable clear pixel separation and clear colors.

[0114] Referring to FIG. 9, in a first example, a light blocker (500) may be positioned to contact at least one area of ​​a plurality of light-emitting elements (100) and may absorb or reflect light in at least one area. In this case, an optical device (300) may not be included. If an optical device (300) is not included, the light blocker (500) may be positioned between a plurality of refractors (200) so that the plurality of refractors (200) are spaced apart from each other. If an optical device (300) is included, the optical device (300) may be positioned on the upper surface of the light blocker (500) and may extend the moisture penetration path to delay the degradation of reliability caused by moisture. Additionally, the height of the optical device (300) may be smaller than the height of the light blocker (500), and light diffraction may be reduced to reduce light emission in unnecessary areas.

[0115] Referring to FIG. 10, in a second example, a light blocker (500) may be placed on the upper surface of an optical device (300). Additionally, the light blocker (500) may be placed between a plurality of refractors (200), and the light extraction efficiency may be increased by minimizing the area that absorbs light. The upper surface of the refractor (200) may be placed above the upper surface of the light blocker (500). This allows for efficient increase in contrast while reducing interference in the optical path. Furthermore, the height of the light blocker (500) may be lower than the maximum height of the refractor (200). In other words, the height of the light blocker (500) may be lower than the height of the first refractor (210). Additionally, the height of the light blocker (500) may be lower than the minimum height of the refractor (200). For example, the height of the light blocker (500) may be lower than the height of the third refractor (230). This allows for improved contrast while minimizing the impact on the extraction direction. By increasing the light extraction efficiency, light interference can be efficiently reduced. In this case, the width (g) of the cross-section of the light blocker (500) may be greater than the distance between the refractors (200). In other words, the width (g) of the cross-section of the light blocker (500) may be greater than the distance (d1) between the first refractor (210) and the second refractor (220). The width (g) of the cross-section of the light blocker (500) may be greater than the distance (d2) between the second refractor (220) and the third refractor (230). This allows for efficient blocking of light. Conversely, the width (g) of the cross-section of the light blocker (500) may be smaller than the width of the refractor (200). In other words, the width (g) of the cross-section of the light blocker (500) may be smaller than the width (w1) of the lower surface of the first refractor (210), the width (w2) of the lower surface of the second refractor (220), and the width (w3) of the lower surface of the third refractor (230). This allows for an increase in light intensity by increasing the light extraction efficiency. This also allows for an increase in light extraction efficiency by reducing interference in the optical path of the refractor (200).

[0116] Referring to FIG. 11, in a third example, a light blocker (500) may be positioned between a plurality of optical devices (300) and on the outside of a plurality of optical devices (300). For example, the light blocker (500) may be positioned to contact an area on at least one side of a plurality of optical devices (300). In this case, since the plurality of optical devices (300) may be separated from each other by the light blocker (500), light interference between a plurality of light-emitting elements (100) can be reduced, thereby enabling clear color and high contrast.

[0117] The width of the light blocker (500) placed between the plurality of optical devices (300) may be equal to the spacing d1 to d2 between the plurality of optical devices (300). This can reduce interference in the optical path.

[0118] Alternatively, the width of the light blocker (500) placed between the plurality of optical devices (300) may be narrower than the spacing d1 to d2 between the plurality of optical devices (300). Since the light blocker (500) may be placed spaced apart from the plurality of light-emitting elements (100), the light extraction efficiency can be improved by allowing side light to be emitted through one area of ​​the optical device (300).

[0119] Alternatively, the width of the light blocker (500) placed between the plurality of optical devices (300) may be wider than the spacing d1 to d2 between the plurality of optical devices (300). In addition, since the plurality of optical devices (300) can be bonded to at least one side of the light-emitting element (100), the light-emitting device having high directional properties can be realized by efficiently blocking side light.

[0120] At this time, the height of the plurality of light blockers (500) may be higher than the height of the light-emitting element (100). This reduces light interference between the plurality of light-emitting elements (100), thereby increasing color clarity. Additionally, the height of the light blockers (500) may be lower than the height from the upper surface of the circuit board (20) to the upper surface of the optical device (300). This does not affect the light path to the optical device (300), thereby increasing light extraction efficiency. Conversely, the height from the upper surface of the circuit board (20) to the upper side of the light blockers (500) may be higher than the height from the upper surface of the light-emitting element (100) to the highest upper side of the refractometer (200). This allows for increased contrast.

[0121] Hereinafter, with reference to FIG. 12, a light-emitting device (10) and a display device (1) including the same according to an embodiment of the present invention will be described. Compared to the embodiments described above, there is a difference in that an auxiliary refractor (600) may be further included between a plurality of refractors (200), and this difference will be explained mainly.

[0122] The auxiliary refractor (600) may be placed between the first refractor (210) and the second refractor (200), and between the second refractor (220) and the third refractor (230). The height of the auxiliary refractor (600) may be smaller than the height of the first refractor (210), the second refractor (200), and the third refractor (230). Since this auxiliary refractor (600) can propagate light directed between multiple refractors (200), it can prevent light between adjacent light-emitting elements (100) from mixing or interfering with each other, and the color distinction between light-emitting elements (100) can be made clearer. The upper surface of the auxiliary refractor (600) may be spaced apart from the upper surface of the first refractor (210), the upper surface of the second refractor (220), and the upper surface of the third refractor (230). This allows for reducing optical interference between each dimming zone. The radius of curvature of the auxiliary refractor (600) may be smaller than the radius of curvature (R1) of the first refractor (210), the radius of curvature (R2) of the second refractor (200), and the radius of curvature (R3) of the third refractor (230). This reduces the amount of light directed toward the auxiliary refractor (600), thereby reducing interference between dimming zones. The radius of curvature of the auxiliary refractor (600) may be smaller than the separation distance (d1, d2).

[0123] Hereinafter, with reference to FIG. 13, a light-emitting device (10) according to one embodiment of the present invention and a display device (1) including the same will be described. The above-described plurality of refractors (200) are referred to as a plurality of lower refractors (200), and the optical device (300) is referred to as a lower optical device (300). Furthermore, in describing the eighth embodiment, there is a difference in that a plurality of upper refractors (700) and an upper optical device (800) may be additionally included when compared to the above-described embodiments, and this difference will be explained mainly.

[0124] Multiple upper refractors (700) are positioned above multiple lower refractors (200) to collect light transmitted through the multiple lower refractors (200). Multiple upper refractors (700) may be formed convexly toward the downward direction. Additionally, multiple upper refractors (700) may be positioned at a predetermined distance upward from the multiple lower refractors (200) to adjust the light focal length, but are not limited thereto. For example, multiple upper refractors (700) and multiple lower refractors (200) may be connected. Furthermore, the curvature of any one of the multiple lower refractors (200) and the multiple upper refractors (700) may be formed differently from the curvature of the other of the multiple lower refractors (200) and the multiple upper refractors (700).

[0125] A plurality of upper refractors (700) may include a first upper refractor (710), a second upper refractor (720), and a third upper refractor (730).

[0126] The first upper refractor (710) is positioned above the first lower refractor (210) and can collect light that has passed through the first lower refractor (210). The first upper refractor (710) may be formed convexly toward the first lower refractor (210). At this time, the distance between the first upper refractor (710) and the first lower refractor (210) may be closer than the distance between the lower optical unit (300) and the upper optical unit (800), thereby allowing the light to be collected efficiently.

[0127] The second upper refractor (720) is positioned above the second lower refractor (220) and can collect light that has passed through the second lower refractor (220). The second upper refractor (720) may be formed convexly toward the second lower refractor (220). At this time, the distance between the second upper refractor (720) and the second lower refractor (220) may be closer than the distance between the lower optical unit (300) and the upper optical unit (800), thereby allowing the light to be collected efficiently.

[0128] The third upper refractor (730) is positioned above the third lower refractor (230) and can collect light that has passed through the third lower refractor (230). The third upper refractor (730) may be formed convexly toward the third lower refractor (230). At this time, the distance between the third upper refractor (730) and the third lower refractor (230) may be closer than the distance between the lower optical unit (300) and the upper optical unit (800), thereby allowing the light to be collected efficiently.

[0129] The curvatures of the first upper refractor (710), the second upper refractor (720), and the third upper refractor (730) may be formed identically. When light is transmitted through these first upper refractors (710), the second upper refractor (720), and the third upper refractor (730), they can refract light while maintaining the deviation between the directional angles adjusted in the lower refractor (200), so that the deviation between the final exit angles transmitted through the multiple upper refractors (700) can be maintained constant. In the lower refractor (200), the difference in directional angles is improved so that the directional angles of the first light-emitting element (110), the second light-emitting element (120), and the third light-emitting element (130) are similar, and in the upper refractor (700), the deviation between the improved directional angles can be maintained. The curvature of any one of the first upper refractor (710), the second upper refractor (720), and the third upper refractor (730) can be formed differently from the curvature of the other of the first upper refractor (710), the second upper refractor (720), and the third upper refractor (730), thereby allowing adjustments to be made to have different projection areas for each pixel at the final stage as needed. For example, the light emitted from the first light-emitting element (110) in a car headlamp may be a low beam having a wide projection area, and the light emitted from the third light-emitting element (130) may be a high beam having a narrow and far projection area.

[0130] Additionally, the first upper refractor (710), the second upper refractor (720), and the third upper refractor (730) are formed with the same height, and when light is transmitted, the light can be refracted while maintaining the deviation between the directional angles adjusted in the lower refractor (200), so that the deviation of the final emission angles can be maintained constant, but is not limited thereto. In the lower refractor (200), the difference in directional angles is improved so that the directional angles of the first light-emitting element (110), the second light-emitting element (120), and the third light-emitting element (130) are similar, and in the upper refractor (700), the deviation between the improved directional angles can be maintained. Additionally, the height of any one of the first upper refractor (710), the second upper refractor (720), and the third upper refractor (730) may be formed differently from the height of the other of the first upper refractor (710), the second upper refractor (720), and the third upper refractor (730), and may be light guided to have different projection areas. For example, in a car headlamp, the light emitted from the first light-emitting element (110) may be a low beam having a wide projection area, and the light emitted from the third light-emitting element (130) may be a high beam having a narrow and far projection area.

[0131] Additionally, the first upper refractor (710) may be formed in the same way as the first lower refractor (210), the second upper refractor (720) may be formed in the same way as the second lower refractor (220), and the third upper refractor (730) may be formed in the same way as the third lower refractor (230).

[0132] The upper optical unit (800) is positioned on the upper surface of a plurality of upper refractors (700) so that light passing through the plurality of upper refractors (700) can be transmitted. This upper optical unit (800) may be formed integrally with the plurality of upper refractors (700). For example, the upper optical unit (800) may be formed of the same material as the plurality of upper refractors (700). Thus, delamination between the plurality of upper refractors (700) and the upper optical unit (800) can be prevented. However, this is not necessarily limited thereto, and depending on the light profile to be implemented, the plurality of upper refractors (700) and the upper optical unit (800) may be formed of different materials.

[0133] Referring to FIGS. 14 to 16, a light-emitting device (10) and a display device (1) including the same according to an embodiment of the present invention will be described. There is a difference in that a plurality of light-emitting elements (100) can be arranged below a single refractometer (200), and this difference will be explained mainly.

[0134] Referring to FIG. 14, a plurality of light-emitting elements (100) may be placed below a single refractor (200). A plurality of light-emitting elements (100) may share a single refractor (200). For example, a plurality of light-emitting elements (100) may be placed below a first refractor (210), and a plurality of light-emitting elements (100) may be placed below a second refractor (220). The distance between the plurality of light-emitting elements (100) sharing the refractor (200) may be closer than the distance between the light-emitting elements (100) that do not share the refractor (200). For example, the spacing between a plurality of light-emitting elements (100) placed below the first refractor (210) may be shorter than the spacing between the light-emitting element (100) placed below the first refractor (210) and the light-emitting element (100) placed below the second refractor (220). The spacing between a plurality of light-emitting elements (100) that do not share the refractor (200) may be 3 to 12 times wider than the distance between light-emitting elements (100) that share the refractor (200). This may result in the effect of improving contrast by minimizing light interference between light-emitting elements (100) that do not share the refractor (200). At this time, the plurality of light-emitting elements (100) that share the refractor (200) may have different wavelengths. This may result in the effect of improving color brightness and color reproduction rate. Additionally, each of the plurality of light-emitting elements (100) sharing the refractor (200) may have a different height relative to the light-emitting surface of the refractor (200) in the vertical direction. The plurality of light-emitting elements (100) sharing the refractor (200) may include a first light-emitting element (110), a second light-emitting element (120), and a third light-emitting element (130).For example, the light-emitting surface (200a) is formed as a curved surface, so that the first vertical separation distance (l1) in the vertical direction between the first light-emitting element (110) and the light-emitting surface (200a), the second vertical separation distance (l2) in the vertical direction between the second light-emitting element (130) and the light-emitting surface (200a), and the third vertical separation distance (l3) in the vertical direction between the third light-emitting element (130) and the light-emitting surface (200a) can be formed differently from each other. Here, the vertical direction may be a direction perpendicular to the surface of the circuit board (20). The second vertical separation distance (l2) may be longer than the first vertical separation distance (l1) and the third vertical separation distance (l3). Through this, the light extraction efficiency of the second light-emitting element (120) can be improved and the color reproduction rate can be increased. The first vertical separation distance (l1) may be 2% to 9% lower than the second vertical separation distance (l2). Additionally, the third vertical separation distance (l3) may be 3% to 8% lower than the second vertical separation distance (l2). The second light-emitting element (120) may have a peak wavelength at a shorter wavelength than the first light-emitting element (110) or the third light-emitting element (130).

[0135] Referring further to FIG. 15, the horizontal separation distance between the side of a plurality of light-emitting elements (100) and the emission surface of a refractometer (200) can be formed differently based on the horizontal direction. The horizontal direction may be a direction extending along the surface of the circuit board (20) and perpendicular to the direction in which the plurality of light-emitting elements (100) are arranged. For example, the emission surface (200a) is formed as a curved surface, so the first horizontal separation distance (k1) in the horizontal direction between the first light-emitting element (110) and the emission surface (200a), the second horizontal separation distance (k2) in the vertical direction between the second light-emitting element (130) and the emission surface (200a), and the third horizontal separation distance (k3) in the vertical direction between the third light-emitting element (130) and the emission surface (200a) can be formed differently. The second horizontal separation distance (k2) may be larger than the first horizontal separation distance (k1) and the horizontal separation distance (k3). For example, the second horizontal separation distance (k2) may be 3% to 12% longer than the first horizontal separation distance (k1) or the third horizontal separation distance (k3). This may have the effect of improving the light extraction efficiency of the second light-emitting element (120), thereby improving color brightness and color reproduction rate.

[0136] Referring further to FIG. 16, the curvature of the refractor (200) may vary by region. The curvature of the refractor (200) may have the greatest curvature in a side region (R) that is lower than the height of the light-emitting element (100). This allows the side light to be adjusted toward the front direction to increase brightness. Additionally, the curvature of the refractor (200) may have the smallest curvature in a central region positioned directly above the light-emitting element (100). This allows the vertical light extraction efficiency of the light-emitting element (100) to be improved, thereby increasing brightness. The curvature of the refractor (200) may have the largest radius of curvature in the central region. For example, the curvature of the refractor (200) may have the largest radius of curvature in a region positioned directly above the second light-emitting element (120) among the plurality of light-emitting elements (100). Through this, the light extraction efficiency of the second light-emitting element (120) with low luminous intensity can be improved, thereby improving the light uniformity.

[0137] Meanwhile, an imaginary line passing through the center of the second light-emitting element (120) in the vertical direction is called the element center line (X). Among the refractors (200), the curvature of the region arranged within a predetermined angle range (θ) based on the element center line (X) can be formed to be greater than the curvature of the center region of the refractor (200). Here, the angle range (θ) can be 60° or more and 80° or less. Through this, light with a viewing angle of 60° or more and 80° or less can be refracted to increase the brightness of the light-emitting device (10).

[0138] Additionally, the regions that overlap the upper surface of the first light-emitting element (110), the upper surface of the second light-emitting element (120), and the upper surface of the third light-emitting element (130) in the refractor (200) may each have different curvatures. The region overlapped with the upper surface of the first light-emitting element (110) in the refractor (200) is called the first refractory region (A), the region overlapped with the upper surface of the second light-emitting element (120) in the refractor (200) is called the second refractory region (B), and the region overlapped with the upper surface of the third light-emitting element (130) in the refractor (200) is called the third refractory region (C). The curvature of the first refractory region (A) and the third refractory region (C) may be greater than the curvature of the second refractory region (B). For example, the refractor (200) can be formed such that the tangent of the first refractive region (A) and the tangent of the third refractive region (C) are inclined more than the tangent of the second refractive region (B) with respect to the surface of the circuit board (20).

[0139] Through this, the directional angle of the first light-emitting element (110) can be reduced. For example, the directional angle of the first light-emitting element (110) when the refractor (200) is removed and the directional angle of the first light-emitting element (110) formed by the refractor (200) may differ by a predetermined first angle. Additionally, the directional angle of the second light-emitting element (120) when the refractor (200) is removed and the directional angle of the second light-emitting element (120) formed by the refractor (200) may differ by a predetermined second angle. The first angle may be greater than the second angle. Furthermore, the directional angle of the third light-emitting element (130) when the refractor (200) is removed and the directional angle of the third light-emitting element (130) formed by the refractor (200) may differ by a predetermined third angle. The third angle may be greater than the second angle. At this time, the first refractive region (A), the second refractive region (B), and the third refractive region (C) can be arranged within an angle range of -45° to 45° centered on the element center line (X). Through this, the difference in directional angle between light-emitting elements can be overcome, making it possible to achieve clearer color realization.

[0140] At least a portion of the upper surface of the first light-emitting element (110), the upper surface of the second light-emitting element (120), and the upper surface of the third light-emitting element (130) may be positioned at an angle relative to the circuit board (20). Each of the plurality of light-emitting elements (100) may be tilted to match the curved surface of the light-emitting surface (200a) of the refractor (200). For example, the upper surface of the first light-emitting element (110) may be tilted to the left along the direction in which the tangent of the first refractive region (A) is tilted. Additionally, the upper surface of the third light-emitting element (130) may be tilted to the right along the direction in which the tangent of the third refractive region (C) is tilted. Through this, the angle formed with the upper surface of the refractor (200) can be adjusted to efficiently control the emission angle.

[0141] 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

Substrate; A plurality of light-emitting elements including a first light-emitting element and a second light-emitting element disposed on the substrate; and It includes a plurality of refractors disposed on the upper surface of at least one of the plurality of light-emitting elements, and The curvature of the first region of the refractor disposed in the first light-emitting element is different from the curvature of the second region of the refractor disposed in the second light-emitting element. Light-emitting device. In Article 1, A plurality of refractors are arranged and configured to allow light generated from the plurality of light-emitting elements to pass through, and further comprising an optical device covering the plurality of light-emitting elements. Light-emitting device. In Article 1, The first light-emitting element is configured to generate a first light having a first peak wavelength, and The above second light-emitting element is configured to generate second light having a second peak wavelength, and The above plurality of refractors, A first refractor positioned above the first light-emitting element and formed convexly upward to concentrate the light of the first light-emitting element; and A second refractor disposed above the second light-emitting element and formed convexly upward to concentrate light from the second light-emitting element, Light-emitting device. In Paragraph 3, The radius of curvature of the first refracting device is smaller than the radius of curvature of the second refracting device. Light-emitting device. In Article 4, The center of the radius of curvature of the first refractor is positioned above the center of the radius of curvature of the second refractor. Light-emitting device. In Paragraph 3, The above plurality of light-emitting elements are, It further includes a third light-emitting element that generates a third light having a third peak wavelength different from the first light-emitting element and the second light-emitting element, and The plurality of refractors above are not disposed in the region directly above the third light-emitting element, Light-emitting device. In Paragraph 3, The above plurality of light-emitting elements are, It further includes a third light-emitting element configured to emit light of a different color from the first light-emitting element and the second light-emitting element, and The above plurality of refractors, A third refractor further comprising a third refractor positioned above the third light-emitting element and formed convexly upward to concentrate light from the third light-emitting element. Light-emitting device. In Article 7, The radius of curvature of the third refractor is greater than the radius of curvature of the first refractor and the radius of curvature of the second refractor, and The radius of curvature of the second refractor is larger than the radius of curvature of the first refractor. Light-emitting device. In Article 8, The center of the radius of curvature of the third refractor is positioned lower than the center of the radius of curvature of the first refractor and the center of the radius of curvature of the second refractor, and The center of the radius of curvature of the second refractor is positioned lower than the center of the radius of curvature of the first refractor. Light-emitting device. In Article 7, The radius of curvature of the first refractor and the radius of curvature of the second refractor are the same, The radius of curvature of the third refractor is larger than the radius of curvature of the first refractor and the radius of curvature of the second refractor. Light-emitting device. In Article 10, The center of the radius of curvature of the third refractor is positioned lower than the center of the radius of curvature of the first refractor and the center of the radius of curvature of the second refractor. Light-emitting device. In Article 11, The height of the third refractor is smaller than the height of the first refractor and the height of the second refractor. Light-emitting device. In Article 11, A first spacer disposed between the first refracting element and the first light-emitting element and configured to transmit the first light, and It further includes a second spacer disposed between the second refracting element and the second light-emitting element and configured to transmit the second light, The center of the radius of curvature of the first refractor is positioned above the first spacer, and The center of the radius of curvature of the second refractor is positioned above the second spacer, Light-emitting device. In Article 11, The first refractor, the second refractor, and the third refractor are spaced apart from each other in the horizontal direction, and The separation distance between the first refractor and the second refractor is the same as the separation distance between the second refractor and the second refractor. Light-emitting device. In Article 10, The center of the radius of curvature of the third refractor is positioned at the same or higher than the center of the radius of curvature of the first refractor and the center of the radius of curvature of the second refractor. Light-emitting device. In Article 15, The height of the third refractor is equal to or greater than the height of the first refractor and the height of the second refractor. Light-emitting device. In Article 15, The first refractor, the second refractor, and the third refractor are spaced apart from each other in the horizontal direction, and The separation distance between the first refractor and the second refractor is greater than the separation distance between the second refractor and the second refractor. Light-emitting device. In Article 7, It further includes a light blocker configured to block light generated by a plurality of light-emitting elements, and The light blocker is positioned between a plurality of light-emitting elements and on the outside of the plurality of light-emitting elements. Light-emitting device. A plurality of light-emitting elements configured to generate light; A plurality of lower refractors disposed above the plurality of light-emitting elements to collect light generated from at least some of the plurality; and It is configured to concentrate light transmitted through the plurality of lower refractors and includes a plurality of upper refractors positioned above the plurality of lower refractors. The curvature of any one of the plurality of lower refractors and the plurality of upper refractors is different from the curvature of another of the plurality of lower refractors and the plurality of upper refractors. Light-emitting device. light-emitting device; and It includes a circuit board for arranging the above-mentioned light-emitting device, and The above-mentioned light-emitting device is, A plurality of light-emitting elements configured to generate light; and It includes a plurality of refractors configured to concentrate light generated from at least some of the plurality of light-emitting elements, and The curvature of any one of the plurality of refractors is different from the curvature of another of the plurality of refractors, Display device.

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