Light emitting device and display including same

Abstract

A light emitting device disclosed herein includes: a circuit board; a plurality of light emitting devices connected to the circuit board; and a reflective sheet that reflects light emitted from the plurality of light emitting devices and has a plurality of reflective cells respectively accommodating the plurality of light emitting devices. The plurality of reflective cells include a plurality of low reflection patterns, and the plurality of low reflection patterns decrease in size, chroma, or brightness toward the edge of the reflective sheet.

Description

Light-emitting device and display including same

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

[0002] A display is a device that displays characters, symbols, images, or videos. The display may include a light-emitting device that emits light and a panel that controls the light emitted from the light-emitting device.

[0003] A light-emitting device includes a light-emitting surface from which light is emitted, and light must be emitted evenly across the entire light-emitting surface to enable characters, symbols, images, or images displayed on the display to be displayed more clearly. In other words, the higher the surface luminescence efficiency of the light-emitting device, the clearer the characters, symbols, images, or images displayed on the display can be.

[0004] Conventionally, to improve the surface luminescence efficiency of a light-emitting device, the light-emitting device includes a plurality of light-emitting elements that emit light, and the spacing between the plurality of light-emitting elements is adjusted or a diffusion plate is used to diffuse the light emitted from the light-emitting elements. However, the problem that the center of the light-emitting surface of the light-emitting device is relatively brighter than the edges has not yet been resolved, and thus there has been a limit to improving the surface luminescence efficiency.

[0005] Embodiments of the present invention have been invented against the background described above, and are intended to provide a light-emitting device capable of improving surface luminescence efficiency and a display including the same.

[0006] A light-emitting device according to a first embodiment of the present invention comprises: a circuit board; a plurality of light-emitting elements connected to the circuit board; and a reflective sheet having a plurality of reflective cells formed thereon, each reflecting cell accommodating the plurality of light-emitting elements and reflecting light emitted from the plurality of light-emitting elements, wherein the plurality of reflective cells include a plurality of low-reflection patterns, and the plurality of low-reflection patterns have a size of a pattern disposed closer to an edge of the reflective sheet that is relatively smaller than that of other patterns. Alternatively, the plurality of low-reflection patterns may have a low saturation or low brightness of a pattern disposed closer to an edge of the reflective sheet. Accordingly, a decrease in luminance at an edge of the light-emitting device can be prevented.

[0007] A light-emitting device according to a second embodiment of the present invention comprises: a circuit board; a plurality of light-emitting elements connected to the circuit board; and a reflective sheet that reflects light emitted from the plurality of light-emitting elements and accommodates the plurality of light-emitting elements, wherein the reflective sheet comprises a plurality of low-reflection patterns, and the plurality of low-reflection patterns may have a size of a pattern disposed farther from the light-emitting elements relatively smaller than that of other patterns. Alternatively, the plurality of low-reflection patterns may have a lower saturation or lower brightness of a pattern disposed closer to an edge of the reflective sheet.

[0008] According to a third embodiment of the present invention, a display includes a light-emitting device that emits light; and a panel that controls light emitted from the light-emitting device, wherein the light-emitting device includes: a circuit board; a plurality of light-emitting elements connected to the circuit board; and a reflective sheet having a plurality of reflective cells formed thereon that reflect light emitted from the plurality of light-emitting elements and each accommodate the plurality of light-emitting elements, wherein the plurality of reflective cells include a plurality of low-reflection patterns, and the plurality of low-reflection patterns may have a size of a pattern disposed closer to an edge of the reflective sheet that is relatively smaller than another pattern. Alternatively, the plurality of low-reflection patterns may have a lower saturation or lower brightness of a pattern disposed closer to an edge of the reflective sheet.

[0009] According to a fourth embodiment of the present invention, a light-emitting device comprises: a circuit board; a plurality of light-emitting elements connected to the circuit board; and a reflective sheet that reflects light emitted from the plurality of light-emitting elements and accommodates the plurality of light-emitting elements, wherein the reflective sheet comprises: a main region; a side region arranged around the main region at an angle with respect to the main region; and a low-reflection pattern arranged in the side region, wherein at least a portion of the plurality of light-emitting elements is arranged in a region where a first-direction array region extending in a first direction overlaps the main region, and at least a portion of the low-reflection pattern is arranged in a region where the first-direction array region overlaps the side region, and the first-direction array region is defined as a virtual region extending from the main region and the side region along the first direction, with a length in the second direction that is the same as a length of at least one of the plurality of light-emitting elements in a second direction that is offset from the first direction. Therefore, a difference in luminance between a region of a row where light-emitting elements are arranged and a region of a row where no light-emitting elements are arranged can be reduced.

[0010] A light-emitting device according to a fifth embodiment of the present invention comprises: a circuit board; a plurality of light-emitting elements connected to the circuit board; and a reflective sheet that reflects light emitted from the plurality of light-emitting elements and accommodates the plurality of light-emitting elements, wherein the reflective sheet comprises: a main region; a side region arranged around the main region at an angle with respect to the main region; and a plurality of low-reflection patterns arranged in the side region, wherein at least a portion of the plurality of low-reflection patterns is arranged in a curved shape having a convex shape on one side or the other side in a first direction. Accordingly, the brightness of light emitted in a circumferential direction of the light-emitting elements can be controlled.

[0011] According to a sixth embodiment of the present invention, a display includes a light-emitting device that emits light; and a panel that controls light emitted from the light-emitting device, wherein the light-emitting device includes: a circuit board; a plurality of light-emitting elements connected to the circuit board; and a reflective sheet that reflects light emitted from the plurality of light-emitting elements and accommodates the plurality of light-emitting elements, wherein the reflective sheet includes: a main region; a side region arranged around the main region to be inclined with respect to the main region; and a plurality of low-reflection patterns arranged in the side region, wherein at least a portion of the plurality of light-emitting elements is arranged in a region where a first-direction array region extending in a first direction overlaps the main region, and at least a portion of the plurality of low-reflection patterns is arranged in a region where the first-direction array region overlaps the side region, and the first-direction array region is defined as a virtual region extending from the main region and the side region along the first direction, with a length in the second direction that is the same as a length in the second direction that is offset from the first direction of at least one of the plurality of light-emitting elements.

[0012] According to embodiments of the present invention, there is an effect that the surface light-emitting effect can be improved by making the degree of light reflection increase toward the edge of the light-emitting device.

[0013] In addition, according to embodiments of the present invention, it is intended to provide a light-emitting device capable of improving surface luminescence efficiency and a display including the same.

[0014] FIG. 1 is a drawing showing a part of a cross-section of a display according to a first embodiment of the present invention.

[0015] Fig. 2 is a plan view of the light-emitting device of the display of Fig. 1.

[0016] Figure 3 is an enlarged view of part A of Figure 2.

[0017] Figure 4 is an enlarged view of part B of Figure 3.

[0018] Figure 5 is a cross-sectional view taken along line VV of Figure 4.

[0019] FIG. 6 is a part of a plan view of a first example of a light-emitting device of a display according to a second embodiment of the present invention.

[0020] FIG. 7 is a drawing showing a cross-section of a light-emitting element of a first example of a light-emitting device of a display according to a second embodiment of the present invention.

[0021] FIG. 8 is a drawing showing a cross-section of a light-emitting element of a second example of a light-emitting device of a display according to a second embodiment of the present invention.

[0022] FIG. 9 is a drawing showing a cross-section of a light-emitting element of a third example of a light-emitting device of a display according to a second embodiment of the present invention.

[0023] FIG. 10 is a drawing showing a part of a cross-section of a display according to a third embodiment of the present invention.

[0024] Fig. 11 is a plan view of the light-emitting device of the display of Fig. 10.

[0025] Figure 12 is an enlarged view of part C of Figure 11.

[0026] Fig. 13 is a plan view of a light-emitting device of a display according to a fourth embodiment of the present invention.

[0027] Figure 14 is an enlarged view of part D of Figure 13.

[0028] Fig. 15 is a plan view of a light-emitting device of a display according to a fifth embodiment of the present invention.

[0029] Fig. 16 is a plan view of a light-emitting device of a display according to a sixth embodiment of the present invention.

[0030] Hereinafter, specific embodiments for implementing the technical concepts of the present invention will be described in detail with reference to the drawings. Furthermore, when describing the present invention, detailed descriptions of known components or functions will be omitted if they are deemed to obscure the gist of the present invention.

[0031] Additionally, when it is said that a component is 'connected to', 'supported by', or 'supplied by' another component, it should be understood that it may be directly connected to, supported by, or supplied to that other component, but there may also be other components present in between.

[0032] The terminology used herein is intended solely to describe specific embodiments and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

[0033] Additionally, please note that the expressions "upper side" and "lower side" in this specification are based on the illustrations in the drawings and may be expressed differently if the orientation of the subject changes. For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted, and the size of each component does not fully reflect the actual size.

[0034] Additionally, terms that include ordinal numbers, such as "first," "second," etc., may be used to describe various components, but these components are not limited by such terms. These terms are used solely to distinguish one component from another.

[0035] The term "comprising" as used in the specification means specifying a particular characteristic, region, integer, step, operation, element and / or component, but does not exclude the presence or addition of other particular characteristics, regions, integers, steps, operations, elements, components and / or groups.

[0036] Hereinafter, a specific configuration of a display (1) according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. The display (1) can display characters, symbols, images, or videos. The display (1) can include a frame (10), a light-emitting device (20), a phosphor layer (30), a film (40), a protective layer (50), and a panel (60).

[0037] The frame (10) can support a light-emitting device (20), a phosphor layer (30), a film (40), a protective layer (50), and a panel (60). In addition, the frame (10) can form the outer shape of the display (1). The light-emitting device (20), a phosphor layer (30), a film (40), a protective layer (50), and a panel (60) can be arranged inside the frame (10).

[0038] The light-emitting device (20) can emit light. The light-emitting device (20) can emit light on a surface. In other words, the light-emitting device (20) can emit light from at least a portion of one surface. For example, the light-emitting device (20) can emit light from at least a portion of the upper surface. The light-emitting device (20) can include a circuit board (100), a light-emitting element (200), a reflective sheet (300), a diffuser (400), and a spacer (500).

[0039] A circuit board (100) may have an electric circuit (not shown) arranged thereon. A plurality of light-emitting elements (200) may be arranged on the circuit board (100) to be connected to the electric circuit. The electric circuit of the circuit board (100) may be electrically connected to a light-emitting diode chip (210) to be described later included in each of the plurality of light-emitting elements (200) to supply electricity to the light-emitting diode chip (210). For example, the circuit board (100) may be a printed circuit board (PCB) on which an electric circuit is printed.

[0040] A plurality of circuit boards (100) may be provided. Some of the plurality of light-emitting elements (200) may be connected to each of the plurality of circuit boards (100). In other words, a predetermined number of light-emitting elements (200) may be connected to each of the plurality of circuit boards (100). The predetermined number of light-emitting elements (200) connected to each of the plurality of circuit boards (100) may be connected in series or in parallel with each other. In addition, the plurality of circuit boards (100) may be connected in parallel with each other. In addition, the predetermined number of light-emitting elements (200) connected to each of the plurality of circuit boards (100) may be connected in parallel with each other. In addition, the plurality of circuit boards (100) may be connected in series with each other. In addition, the plurality of light-emitting elements (200) may independently emit light or control the amount of light in predetermined numbers.

[0041] The light-emitting element (200) can emit light. The light-emitting element (200) can be provided in multiple units. The multiple light-emitting elements (200) can be connected to the circuit board (100). The multiple light-emitting elements (200) can be connected to the circuit board (100) so as to be arranged in a grid shape. In other words, the multiple light-emitting elements (200) can be connected to the circuit board (100) so as to be arranged in a predetermined number of rows and a predetermined number of columns. The light-emitting element (200) accommodated in the reflective cell (310) arranged in the first zone (301) included in the reflective sheet (300), which will be described later, can have a different beam angle, luminous intensity, or peak wavelength from the light-emitting element (200) accommodated in the reflective cell (310) arranged in the third zone (303) included in the reflective sheet (300), which will be described later. The light-emitting element (200) may include a light-emitting diode chip (210). The light-emitting diode chip (210) is connected to an electric circuit of a circuit board (100) and can emit light by electricity supplied through the electric circuit.

[0042] The reflective sheet (300) can reflect light emitted from a plurality of light-emitting elements (200). The reflective sheet (300) can include a first zone (301), a second zone (302), and a third zone (303). The first zone (301) can include a central portion of the reflective sheet (300). In addition, the second zone (302) can be arranged closer to the edge of the reflective sheet (300) than the first zone (301). In addition, the third zone (303) can be arranged closer to the edge of the reflective sheet (300) than the second zone (302). In other words, the first zone (301), the second zone (302), and the third zone (303) can be arranged from the central portion of the reflective sheet (300) toward the edge.

[0043] A plurality of reflective cells (310) may be formed on the reflective sheet (300). In addition, a plurality of light-emitting elements (200) may be accommodated in each of the plurality of reflective cells (310), so that the light emitted from the light-emitting elements (200) may be reflected by the reflective cells (310). The plurality of reflective cells (310) may be arranged in a grid shape. In other words, the plurality of reflective cells (310) may be formed on the reflective sheet (300) so as to be arranged in a predetermined number of rows and a predetermined number of columns. The reflective cells (310) may have a shape that is symmetrical with respect to the horizontal or vertical direction when viewed from above. For example, the reflective cells (310) may have an approximately rectangular or square shape when viewed from above. In addition, the plurality of reflective cells (310) may be arranged so as to be symmetrical with respect to the horizontal and vertical directions when viewed from above. For example, a plurality of reflective cells (310) may be arranged in a rectangular or square shape when viewed from above. The reflective area of ​​a plurality of reflective cells (310) may increase as they are arranged closer to the edge of the reflective sheet (300). The reflective cell (310) may include an element arrangement portion (311), a wall portion (312), and a low-reflection pattern (313).

[0044] A light-emitting element (200) may be placed in the element placement section (311). An element placement hole (311-1) through which at least a portion of the light-emitting element (200) may pass may be formed in the element placement section (311) so that the light-emitting element (200) may be placed. The element placement hole (311-1) may be the same as the low-reflection pattern (313), as will be described later.

[0045] The element placement portion (311) may have a shape that is symmetrical with respect to the horizontal and vertical directions when viewed from above. For example, the element placement portion (311) may have an overall rectangular shape or a square shape when viewed from above. The shapes of the element placement portions (311) arranged in the first zone (301) and the second zone (302) of the reflective sheet (300) may be different from the shape of the element placement portion (311) arranged in the third zone (303) of the reflective sheet (300). As described below, the shapes of the low-reflection patterns (313) arranged in the element placement portions (311) of the first zone (301) and the second zone (302) may be different from the shapes of the low-reflection patterns (313) arranged in the element placement portion (311) of the third zone (303). In addition, the shape of the element placement portion (311) arranged in the first zone (301) and the second zone (302) of the reflective sheet (300) may be different from the shape of the element placement portion (311) arranged in the third zone (303) of the reflective sheet (300). A low-reflection pattern (313) may be arranged in the element placement portion (311).

[0046] The moon portion (312) may form a boundary with the neighboring reflective cell (310). The moon portion (312) may have a shape that is symmetrical with respect to the horizontal and vertical directions when viewed from above. For example, the moon portion (312) may have an overall rectangular or square shape when viewed from above. The moon portion (312) may have an inclined surface (312-1) that is inclined toward the element arrangement portion (311). In addition, the upper surface or height of the moon portion (312) may be higher than that of the light-emitting element (200).

[0047] The moon portion (312) of the reflective cell (310) arranged in the first zone (301) and the second zone (302) may have a different shape or different area from the shape of the first low-reflection pattern (313-1) included in the reflective cell (310) of the first zone (301) to be described later and the second low-reflection pattern (313-2) included in the reflective cell (310) of the second zone (302) to be described later. For example, the moon portion (312) of the reflective cell (310) arranged in the first zone (301) and the second zone (302) may have an overall rectangular or square shape when viewed from above. In addition, the first low-reflection pattern (313-1) of the reflective cell (310) of the first zone (301) and the second low-reflection pattern (313-2) of the reflective cell (310) of the second zone (302) may have a circular shape. In addition, the moon portion (312) of the reflective cell (310) arranged in the third zone (303) may have a shape corresponding to the shape of the third low-reflection pattern (313-3) included in the reflective cell (310) of the third zone (303), which will be described later. For example, the moon portion (312) of the reflective cell (310) arranged in the third zone (303) may have an overall rectangular shape or a square shape when viewed from above. Additionally, the third low-reflection pattern (313-3) of the reflective cell (310) of the third zone (303) may have a rectangular shape or a square shape.

[0048] The low-reflection pattern (313) can reduce the reflection area of ​​the reflective cell (310). The low-reflection pattern (313) can be arranged in the element arrangement portion (311) around the light-emitting element (200). The low-reflection pattern (313) can be arranged by forming a hole in the element arrangement portion (311) around the light-emitting element (200), or the element arrangement portion (311) around the light-emitting element (200) can be arranged with a pattern having low brightness. The low-reflection pattern (313) can have a lower light reflectance than the light reflectance of the reflective sheet (300). When the low-reflection pattern (313) is arranged by forming a hole in the element arrangement portion (311) around the light-emitting element (200), the low-reflection pattern (313) can serve as the element arrangement hole (311-1). In other words, the low-reflection pattern (313) and the element placement hole (311-1) may be the same.

[0049] The plurality of low-reflective patterns (313) may have a size in which a pattern positioned closer to the edge of the reflective sheet (300) is relatively smaller than the other patterns. Alternatively, the plurality of low-reflective patterns may have a lower saturation or lower brightness than a pattern positioned closer to the edge of the reflective sheet. The plurality of low-reflective patterns (313) may have a smaller size, lower saturation, or lower brightness as they are positioned closer to the edge of the reflective sheet (300). The plurality of low-reflective patterns (313) may also be achromatic. In addition, the element area ratio, which is the ratio of the light-emitting area of ​​the light-emitting element (200) to the area of ​​the low-reflective patterns (313) of the plurality of reflective cells (310), may increase as they are positioned closer to the edge of the reflective sheet (300). In addition, the sum of the areas of the low-reflection patterns (313) of the plurality of reflective cells (310) in the edge row may be smaller than the sum of the areas of the low-reflection patterns (313) of the plurality of reflective cells (310) in the row passing through the center of the reflective sheet (300). In addition, the distance (d1) between the edge of the lumen (312) of the plurality of reflective cells (310) and the edge of the low-reflection pattern (313) may increase as the cells are arranged closer to the edge of the reflective sheet (300). In addition, the distance (d2) between the edge of the light-emitting element (200) of the plurality of reflective cells (310) and the edge of the low-reflection pattern (313) may decrease as the cells are arranged closer to the edge of the reflective sheet (300). The d1 / (d1+d2) value of the first low-reflection pattern (313-1) may be smaller than the d1 / (d1+d2) value of the second low-reflection pattern (313-2). Alternatively, the d1 / (d1+d2) value of the first low-reflection pattern (313-1) may be smaller than the d1 / (d1+d2) value of the third low-reflection pattern (313-3). The d1 / (d1+d2) value of the second low-reflection pattern (313-2) may be smaller than the d1 / (d1+d2) value of the third low-reflection pattern (313-3).On the opposite side of the light-emitting element (200), a distance (d3) between the edge of the lumen (312) and the edge of the low-reflection pattern (313) and a distance (d4) between the edge of the light-emitting element (200) and the edge of the low-reflection pattern (313) can be formed, and d1 / (d1+d2) can have a different value from d3 / (d3+d4). In addition, d2 and d4 can have different values. The plurality of low-reflection patterns (313) can include a first low-reflection pattern (313-1), a second low-reflection pattern (313-2), and a third low-reflection pattern (313-3).

[0050] The first low-reflection pattern (313-1) may be included in the reflective cell (310) arranged in the first zone (301). The shape of the first low-reflection pattern (313-1) may be different from the shape of the light-emitting element (200). For example, the first low-reflection pattern (313-1) may have a circular shape, and the shape of the light-emitting element (200) may have a rectangular shape or a square shape.

[0051] The second low-reflection pattern (313-2) may be included in the reflective cell (310) arranged in the second zone (302). In other words, the second low-reflection pattern (313-2) may be included in the reflective cell (310) arranged around the reflective cell (310) including the first low-reflection pattern (313-1). The first zone (301) including the first low-reflection pattern (313-1) may be surrounded by the second zone (302) including the second low-reflection pattern (313-2). The area of ​​the second low-reflection pattern (313-2) may be smaller than the area of ​​the first low-reflection pattern (313-1). In addition, the curvature of the second low-reflection pattern (313-2) may be larger than the curvature of the first low-reflection pattern (313-1). In addition, the radius of curvature of the second low-reflective pattern (313-2) may be smaller than the radius of curvature of the first low-reflective pattern (313-1). The shape of the second low-reflective pattern (313-2) may be different from the shape of the light-emitting element (200). For example, the second low-reflective pattern (313-2) may have a circular shape, and the shape of the light-emitting element (200) may have a rectangular shape or a square shape.

[0052] The third low-reflection pattern (313-3) may be included in the reflective cell (310) arranged in the third zone (303). In other words, the third low-reflection pattern (313-3) may be included in the reflective cell (310) arranged around the reflective cell (310) including the second low-reflection pattern (313-2). The first zone (301) including the first low-reflection pattern (313-1) may be surrounded by the third zone (303) including the third low-reflection pattern (313-3). Alternatively, the second zone (302) including the second low-reflection pattern (313-2) may be surrounded by the third zone (303) including the third low-reflection pattern (313-3). The area of ​​the third low-reflective pattern (313-3) may be smaller than the area of ​​the second low-reflective pattern (313-2). In addition, the curvature or curvature radius of the third low-reflective pattern (313-3) may be different from the curvature of the first low-reflective pattern (313-1) and the curvature or curvature radius of the second low-reflective pattern (313-2). The shape of the third low-reflective pattern (313-3) may have a shape corresponding to the shape of the light-emitting element (200). For example, the third low-reflective pattern (313-3) may have a rectangular shape or a square shape.

[0053] The diffuser plate (400) can diffuse light emitted from a plurality of light-emitting elements (200). The diffuser plate (400) can be placed above the plurality of light-emitting elements (200) and the reflective sheet (300).

[0054] A spacer (500) may be placed between the diffuser plate (400) and the reflective sheet (300) so that the diffuser plate (400) and the reflective sheet (300) maintain a predetermined distance therebetween. The spacer (500) may have a columnar or cone shape and may have a circular top surface when viewed from above. The side surface of the spacer (500) may be light reflective. The spacer (500) is not necessarily required, and may not be placed depending on the shape and size of the light-emitting device (20).

[0055] The phosphor layer (30) can implement white light by including a phosphor or quantum dot (QD, quantum dot, not shown) that emits light of a converted color when light is incident. The phosphor layer (30) can be placed above the diffuser plate (400) of the light-emitting device (20).

[0056] However, it is not necessarily limited to this, and in another embodiment, the phosphor layers (30) may be arranged correspondingly to cover each light emitting element (200). Accordingly, the phosphor layers (30) may be arranged in multiple pieces spaced apart by a set interval.

[0057] Alternatively, in another embodiment, a light blocking layer may be disposed on top of a plurality of spaced apart fluorescent layers (30). A plurality of light blocking layers may be disposed corresponding to each fluorescent layer (30). Alternatively, a plurality of light blocking layers may be disposed corresponding to each light emitting element (200). The light blocking layer may include a light reflective material and reflects light generated from the light emitting element (200) from the upper surface of the light emitting element (200) to change the light emission path. When the light blocking layer is disposed, the position of the upper surface of the light blocking layer may be positioned lower than the upper surface of the wall portion (312) of the reflective sheet (300). Therefore, a greater amount of light may be reflected by the reflective sheet (300).

[0058] The film (40) may be positioned above the light emitting element (200) to refract or focus light emitted from the light emitting element (200) to increase the brightness of light on the surface of the backlight. The film (40) may be formed as a single layer or may be formed as two or more layers. The film (40) may include a prism sheet.

[0059] The protective layer (50) is placed between the panel (60) and the film (40), which will be described later, to prevent the material included in the panel (60) from diffusing into the film (40). In addition, it diffuses the viewing angle adjusted by the film (40) to widen the viewing angle, thereby enabling light to be uniformly distributed to the light-emitting device (20).

[0060] The panel (60) may be positioned above the protective layer (50) so that light passing through the protective layer (50) can be incident on the panel (60) and emitted through the panel (60).

[0061] As described above, the light emitting device (20) of the display (1) according to the first embodiment of the present invention can be configured so that the degree of light reflection increases as the reflective sheet (300) moves toward the edge. Therefore, the light emitting device (20) of the display (1) according to the first embodiment of the present invention has the effect of improving the surface light emitting effect.

[0062] Meanwhile, in addition to this configuration, according to the second embodiment of the present invention, a plurality of light-emitting elements (200) may be arranged in one reflective cell (310) in the reflective sheet (300).

[0063] Hereinafter, a second embodiment will be described with reference to FIGS. 6 to 9. In describing the second embodiment of the present invention, compared to the above-described embodiments, there is a difference in that a plurality of light-emitting elements (200) are arranged in one reflective cell (310) in the reflective sheet (300). This difference will be mainly described, and the same descriptions and drawing reference numerals will be used in the above-described embodiments.

[0064] Referring to FIG. 6, a plurality of light-emitting elements (200) can be arranged in one reflective cell (310) in the reflective sheet (300).

[0065] In addition, a plurality of low-reflection patterns (313) may be arranged in adjacent areas of at least some of the light-emitting elements (200) among the plurality of light-emitting elements (200). The plurality of low-reflection patterns (313) may have a size in which a pattern arranged farther from the edge of the reflective sheet (300) is relatively smaller than other patterns. Alternatively, the plurality of low-reflection patterns may have a lower saturation or lower brightness than a pattern arranged closer to the edge of the reflective sheet. The plurality of low-reflection patterns (313) may become smaller in size, have lower saturation, or have lower brightness as they are arranged farther from the light-emitting elements (200). In addition, the distance between the low-reflection patterns (313) may become larger as the plurality of low-reflection patterns (313) are arranged farther from the light-emitting elements (200). Additionally, one of the plurality of low-reflective patterns (313) may be smaller in size than another of the plurality of low-reflective patterns (313).

[0066] Meanwhile, each adjacent region of at least some of the light emitting elements (200) among the plurality of light emitting elements (200) may be named a pattern arrangement region (R). This pattern arrangement region (R) may have a circular shape as shown in FIG. 6. The plurality of low-reflection patterns (313) arranged in one pattern arrangement region (R) may be arranged at different distances depending on the arrangement positions. For example, the distance between the plurality of low-reflection patterns (313) arranged relatively adjacent to the light emitting element (200) among the plurality of low-reflection patterns (313) may be smaller than the distance between the low-reflection patterns (313) arranged relatively spaced apart from the light emitting element (200) among the plurality of low-reflection patterns (313). As a more detailed example, the spacing between multiple low-reflection patterns (313) arranged in one pattern arrangement area (R) may become larger as they are spaced apart from the light-emitting element (200).

[0067] Among the plurality of low-reflection patterns (313) arranged in the pattern arrangement area (R), one or more may have different sizes. For example, among the low-reflection patterns (313) arranged in one pattern arrangement area (R), the size of the low-reflection pattern (313) arranged relatively close to the light-emitting element (200) may be larger than the size of the low-reflection pattern (313) arranged relatively farther away from the light-emitting element (200). As a more detailed example, the plurality of low-reflection patterns (313) arranged in one pattern arrangement area (R) may have a smaller size as they are arranged further away from the light-emitting element (200).

[0068] A plurality of low-reflection patterns (313) arranged in one pattern arrangement area (R) may be arranged at different densities depending on the arrangement position. For example, the density of a low-reflection pattern (313) arranged relatively close to a light-emitting element (200) among the plurality of low-reflection patterns (313) may be greater than the density of a low-reflection pattern (313) arranged relatively spaced apart from the light-emitting element (200) among the plurality of low-reflection patterns (313). Alternatively, a low-reflection pattern (313) surrounding one light-emitting element (200) may have different brightness, different sizes, or different saturations in a part of the low-reflection pattern (313) arranged closest to one light-emitting element (200) and in a part of the low-reflection pattern (313) arranged farthest from one light-emitting element (200).

[0069] Referring to FIG. 7, a light-emitting element (200) may include a light-emitting diode chip (210) and a light-transmitting portion (220). The light-emitting diode chip (210) may be connected to a circuit board (100). In addition, the light-transmitting portion (220) may cover the light-emitting diode chip (210). The light-emitting diode chip (210) may be connected to an electric circuit of the circuit board (100) and may emit light by electricity supplied through the electric circuit. The light-transmitting portion (220) may cover the light-emitting diode chip (210) so that the light-emitting diode chip (210) is sealed from the outside, thereby protecting the light-emitting diode chip (210). In addition, the light-transmitting portion (220) may function as a lens that guides the path of light emitted from the light-emitting diode chip (210) in a predetermined direction.

[0070] A plurality of light-emitting elements (200) may be provided. The plurality of light-emitting elements (200) may be electrically connected to an electric circuit of a circuit board (100). The plurality of light-emitting elements (200) may be arranged in a main region (3100) included in a reflective sheet (300), which will be described later. The light-emitting element (200) arranged in the center of the main region (3100) of the reflective sheet (300) may have different beam angles, luminous intensity, and peak wavelengths from the light-emitting elements (200) arranged at the edges of the main region (3100).

[0071] The light transmitting portion (220) may function as a lens to guide the path of light emitted from the light emitting diode chip (210) in a predetermined direction. The light transmitting portion (220) may additionally include a wavelength conversion material. Accordingly, light emitted from the light emitting diode chip (210) may be converted by the wavelength conversion material and emitted at a different wavelength. The light transmitting portion (220) may be a molding, resin, lens, or the like.

[0072] Referring to FIG. 8, the light emitting element (200) may further include a package substrate (230), a chip arrangement layer (240), and a fluorescent layer (250). The package substrate (230) may be connected to a circuit board (100). The chip arrangement layer (240) may be disposed on an upper layer than the package substrate (230), and a chip arrangement space (240-1) may be formed. The chip arrangement space (240-1) may be formed such that the area of ​​a cross-section perpendicular to the vertical direction increases as it goes upward. In other words, the side of the chip arrangement space (240-1) may be inclined to form an obtuse angle with the horizontal bottom. The fluorescent layer (250) may be disposed in the chip arrangement space (240-1). The light emitting diode chip (210) may be disposed in the fluorescent layer (250) so as to be connected to the package substrate (230). For example, a light-emitting diode chip (210) can be connected to a package substrate (230) by a wire or the like. The light-transmitting portion (220) can cover the package substrate (230), the chip arrangement layer (240), and the fluorescent layer (250).

[0073] Referring to FIG. 9, the light emitting element (200) may further include a reflective layer (260). The fluorescent layer (250) may be disposed above the package substrate (230). In addition, the light emitting diode chip (210) may be disposed on the fluorescent layer (250). In addition, the reflective layer (260) may be disposed above the fluorescent layer (250).

[0074] Hereinafter, a specific configuration of a display (1) according to a fifth embodiment of the present invention will be described with reference to FIGS. 10 to 12. The display (1) can display characters, symbols, images, or videos. The display (1) can include a frame (10), a light-emitting device (20), a phosphor layer (30), a film (40), a protective layer (50), and a panel (60).

[0075] Referring to FIG. 10, the frame (10) can support a light-emitting device (20), a phosphor layer (30), a film (40), a protective layer (50), and a panel (60). In addition, the frame (10) can form the outer shape of the display (1). The light-emitting device (20), the phosphor layer (30), the film (40), the protective layer (50), and the panel (60) can be arranged inside the frame (10).

[0076] The light-emitting device (20) can emit light. The light-emitting device (20) can emit light on a surface. In other words, the light-emitting device (20) can emit light from at least a portion of one surface. For example, the light-emitting device (20) can emit light from at least a portion of the upper surface. The light-emitting device (20) can include a circuit board (100), a light-emitting element (200), a reflective sheet (300), a diffuser (400), and a spacer (500).

[0077] An electric circuit (not shown) may be arranged on a circuit board (100). A plurality of light-emitting elements (200) may be arranged on the circuit board (100) to be connected to the electric circuit. The electric circuit of the circuit board (100) may be electrically connected to a light-emitting diode chip (210) to be described later included in each of the plurality of light-emitting elements (200) to supply electricity to the light-emitting diode chip (210). For example, the circuit board (100) may be a printed circuit board (PCB) on which an electric circuit is printed.

[0078] A plurality of circuit boards (100) may be provided. At least some of the plurality of light-emitting elements (200) may be connected to each of the plurality of circuit boards (100). In other words, a predetermined number of light-emitting elements (200) may be connected to each of the plurality of circuit boards (100). The plurality of circuit boards (100) may extend in a first direction and be spaced apart from each other in a second direction that is opposite (or intersects) to the first direction. For example, the first direction may be a horizontal direction and the second direction may be a vertical direction. In addition, the circuit board (100) may have a bar shape extending in the first direction.

[0079] Referring to FIG. 11, a reflective sheet (300) reflects light emitted from a plurality of light-emitting elements (200) and can accommodate a plurality of light-emitting elements (200). The reflective sheet (300) may have a rectangular shape having a predetermined length in each of a first direction and a second direction, and the length in the first direction may be formed to be longer than the length in the second direction. The reflective sheet (300) may include a main region (3100), a side region (3200), and a low-reflection pattern (3300).

[0080] The main region (3100) may include a central portion of the reflective sheet (300). A plurality of light-emitting elements (200) may be arranged in the main region (3100). A device arrangement hole (311) through which at least a portion of the light-emitting elements (200) may be formed in the main region (3100) so that the light-emitting elements (200) may be arranged. At least a portion of the plurality of light-emitting elements (200) in the main region (3100) may be arranged in a region where a first direction arrangement region (WR) extending in a first direction overlaps with the main region (3100) of the reflective sheet (300). For example, at least a portion of the plurality of light-emitting elements (200) in the main region (3100) may be arranged in a region where a first direction arrangement region (WR) extending in a horizontal direction overlaps with the main region (3100).

[0081] The first direction array region (WR) may be defined as a virtual region having a width equal to the second direction length of at least one light-emitting element (200) and extending from the main region (3100) of the reflective sheet (300) and the side region (3200) to be described later along the first direction. For example, the first direction array region (WR) may be defined as a virtual region having a width equal to the vertical direction length of at least one light-emitting element (200) and extending from the main region (3100) of the reflective sheet (300) and the first side portion (3210) along the horizontal direction.

[0082] The first direction array regions (WR) may be provided in multiple numbers or as multiple regions. In addition, the plurality of first direction array regions (WR) may be spaced apart from each other in the second direction, and at least a portion of the plurality of light-emitting elements (200) may be arranged in a region where the plurality of first direction array regions (WR) and the main region (3100) overlap. For example, the plurality of first direction array regions (WR) may be spaced apart from each other in the vertical direction, and at least a portion of the plurality of light-emitting elements (200) may be arranged in a region where the plurality of first direction array regions (WR) and the main region (3100) overlap.

[0083] The side region (3200) may be arranged around the main region (3100) at an angle relative to the main region (3100). The side region (3200) may be arranged at an angle such that its height increases as it moves away from the main region (3100). In other words, the side region (3200) may be inclined upward relative to the main region (3100). The side region (3200) may include a first side portion (3210) and a second side portion (3220).

[0084] The first side portion (3210) may be arranged on both sides of the main area (3100) in the first direction. In other words, a plurality of first side portions (3210) may be provided, and the main area (3100) may be arranged between the plurality of first side portions (3210), and one of the first side portions (3210), the main area (3100), and another of the first side portions (3210) may be sequentially arranged along the first direction. For example, one of the first side portions (3210), the main area (3100), and another of the first side portions (3210) may be sequentially arranged along the horizontal direction.

[0085] The second side portion (3220) may be arranged on both sides of the main area (3100) in the second direction. In other words, the second side portion (3220) may be provided in multiple pieces, and the main area (3100) may be arranged between the multiple second side portions (3220), and one second side portion (3220), the main area (3100), and another second side portion (3220) may be sequentially arranged along the second direction. For example, one second side portion (3220), the main area (3100), and another second side portion (3220) may be sequentially arranged along the vertical direction. The reflection area of ​​the second side portion (3220) may be larger than the reflection area of ​​the first side portion (3210).

[0086] The low-reflection pattern (3300) may have a lower light reflectance than a portion of the reflective sheet (300) where the low-reflection pattern (3300) is not arranged. The low-reflection pattern (3300) may be provided in multiple pieces, and the multiple low-reflection patterns (3300) may be arranged in the side region (3200). The low-reflection pattern (3300) may be arranged by forming a hole in the side region (3200) or by being colored. Alternatively, the low-reflection pattern (3300) may have a different brightness or color from other regions. At least a portion of the multiple low-reflection patterns (3300) may be arranged in an area where the first direction array area (WR) and the side region (3200) overlap. In addition, another portion of the multiple low-reflection patterns (3300) may be arranged in a side region (3200) other than the first direction array area (WR). In addition, at least a portion of the low-reflection patterns (3300) arranged in an area where the first direction array area (WR) and the side area (3200) overlap may be larger in size, more densely arranged, or have relatively closer spacing between the low-reflection patterns (3300) than the low-reflection patterns (3300) arranged in a side area (3200) other than the first direction array area (WR).

[0087] For example, at least a portion of the plurality of low-reflective patterns (3300) may be arranged in an area where the first direction array region (WR) and the first side portion (3210) overlap in the first side portion (3210). In addition, another portion of the plurality of low-reflective patterns (3300) may be arranged in a first side portion (3210) other than the first direction array region (WR) in the first side portion (3210). In addition, at least a portion of the low-reflective patterns (3300) arranged in an area where the first direction array region (WR) and the first side portion (3210) overlap may be larger in size, arranged more densely, or have relatively closer spacing between the low-reflective patterns (3300). The low-reflection pattern (3300) disposed in the area where the first direction array region (WR) and the first side portion (3210) overlap in the first side portion (3210) may be referred to as a first region inner pattern. In addition, the low-reflection pattern (3300) disposed in the first side portion (3210) other than the first direction array region (WR) in the first side portion (3210) may be referred to as a first region outer pattern. In addition, at least a part of the first region inner pattern may be larger in size than the first region outer pattern, or may be disposed more densely, or the spacing between the patterns may be relatively close.

[0088] A plurality of low-reflective patterns (3300) may be arranged in the side region (3200) so as to be symmetrical with respect to an imaginary first direction center line (CL1) extending in a first direction while passing through the center of the reflective sheet (300). The low-reflective pattern (3300) may include a first pattern (3310) and a second pattern (3320). Alternatively, the plurality of low-reflective patterns (3300) may be arranged in the side region (3200) so as to be symmetrical with respect to a second direction center line (CL2) extending in a second direction while passing through the center of the reflective sheet (300) and being perpendicular to the first direction center line (CL1).

[0089] The first pattern (3310) may be arranged within a predetermined first separation distance (L1) from the main region (3100). For example, the first pattern (3310) may be arranged within a predetermined first separation distance (L1) from the main region (3100) in the first side portion (3210). In addition, the first separation distance (L1) may be less than half of the length of the first side portion (3210) in the first direction. The first separation distance (L1) may be less than half of the length of the first side portion (3210) in the horizontal direction. The number of the first patterns (3310) may be less than the number of the second patterns (3320). Alternatively, the density of the first patterns (3310) may be less than the density of the second patterns (3320). Therefore, the reflectivity of light in the light emitting device (20) may be controlled.

[0090] The second pattern (3320) may be positioned further apart from the main area (3100) by a first distance (L1). For example, the second pattern (3320) may be positioned further apart from the main area (3100) by a first distance (L1) in the first side portion (3210).

[0091] The size of the patterns constituting the low-reflection pattern (3300) may be smaller than the size of the light-emitting element (200). Therefore, the light reflection area can be finely controlled.

[0092] The shape of the patterns constituting the low-reflection pattern (3300) may be the same as the shape of the light-transmitting portion (220). The shape of the patterns constituting the low-reflection pattern (3300) may include a curved area or have a circular shape. The patterns constituting the low-reflection pattern (3300) may have a curvature, and the curvature of the patterns may be greater than the curvature of the light-transmitting portion (220). Alternatively, the patterns constituting the low-reflection pattern (3300) may have a radius of curvature, and the radius of curvature of the patterns may be smaller than the radius of curvature of the light-transmitting portion (220). Therefore, a low-reflection area can be formed evenly. However, the present invention is not necessarily limited thereto, and the patterns constituting the low-reflection pattern (3300) may also have a rectangular shape.

[0093] The diffuser plate (400) can diffuse light emitted from a plurality of light-emitting elements (200). The diffuser plate (400) can be placed above the plurality of light-emitting elements (200) and the reflective sheet (300).

[0094] A spacer (500) may be placed between the diffuser plate (400) and the reflective sheet (300) so that the diffuser plate (400) and the reflective sheet (300) maintain a predetermined distance therebetween. The spacer (500) may reflect light emitted from the light-emitting element (200). The spacer (500) may have a cylindrical shape, a cone-shaped shape, or the like, and may include a material capable of reflecting light, or its surface may be coated with a material capable of reflecting light. The spacer (500) is not necessarily required, and may not be placed depending on the shape and size of the light-emitting device (20).

[0095] The phosphor layer (30) can implement white light by including a phosphor or quantum dot (QD, quantum dot, not shown) that emits light of a converted color when light is incident. The phosphor layer (30) can be placed above the diffuser plate (400) of the light-emitting device (20).

[0096] However, it is not necessarily limited to this, and in another embodiment, the phosphor layers (30) may be arranged correspondingly to cover each light emitting element (200). Accordingly, the phosphor layers (30) may be arranged in multiple pieces spaced apart by a set interval.

[0097] Alternatively, in another embodiment, a light blocking layer may be disposed on top of a plurality of spaced apart fluorescent layers (30). A plurality of light blocking layers may be disposed corresponding to each fluorescent layer (30). Alternatively, a plurality of light blocking layers may be disposed corresponding to each light emitting element (200). The light blocking layer may include a light reflective material and may reflect light generated from the light emitting element (200) from the upper surface of the light emitting element (200) to change the light emission path. When the light blocking layer is disposed, the position of the upper surface of the light blocking layer may be positioned lower than the upper surface of the side region (3200) of the reflective sheet (300). Therefore, a greater amount of light may be reflected by the reflective sheet (300).

[0098] The film (40) may be positioned above the light emitting element (200) to refract or focus light emitted from the light emitting element (200) to increase the brightness of light on the surface of the backlight. The film (40) may be formed as a single layer or may be formed as two or more layers. The film (40) may include a prism sheet.

[0099] The protective layer (50) is placed between the panel (60) and the film (40), which will be described later, to prevent the material included in the panel (60) from diffusing into the film (40). In addition, the viewing angle adjusted by the film (40) is diffused to widen the viewing angle, thereby enabling light to be uniformly distributed to the light emitting device (20).

[0100] The panel (60) may be positioned above the protective layer (50) to control light passing through the protective layer (50).

[0101] As described above, the light emitting device (20) of the display (1) according to the fifth embodiment of the present invention can be configured so that light emitted from a plurality of light emitting elements (200) is reflected onto the reflective sheet (300), but more light is reflected from the side region (3200) of the reflective sheet (300), and light is evenly reflected from the side region (3200). Therefore, the light emitting device (20) of the display (1) according to the fifth embodiment of the present invention has the effect of improving the surface light emitting effect.

[0102] Meanwhile, in addition to this configuration, according to the sixth embodiment of the present invention, at least some of the plurality of light-emitting elements (200) may be arranged in an area where the first direction array area (WR), the second direction array area (LR) extending in the second direction, and the main area (3100) overlap, and other some of the plurality of low-reflection patterns (3300) may be arranged in an area where the second direction array area (WR) and the side area (3200) overlap.

[0103] Hereinafter, a sixth embodiment will be described with reference to FIGS. 13 and 14. In describing the sixth embodiment of the present invention, compared to the above-described embodiments, there is a difference in that at least some of the plurality of light-emitting elements (200) are arranged in an area where the first direction array area (WR), the second direction array area (LR) extending in the second direction, and the main area (3100) overlap, and other parts of the plurality of low-reflection patterns (3300) are arranged in an area where the second direction array area (WR) and the side area (3200) overlap. The description will focus on these differences, and the same description and drawing reference numerals refer to the above-described embodiments.

[0104] Referring to FIGS. 13 and 14, at least a portion of the plurality of light-emitting elements (200) may be arranged in an area where a first direction array area (WR), a second direction array area (LR) extending in a second direction, and a main area (3100) overlap. For example, in the main area (3100), at least a portion of the plurality of light-emitting elements (200) may be arranged in an area where a first direction array area (WR) extending in a horizontal direction, a second direction array area (LR) extending in a vertical direction, and a main area (3100) overlap.

[0105] The second direction array region (LR) may be defined as a virtual region that has the same width as the first direction length of at least one light emitting element (200) and extends from the main region (3100) and the side region (3200) along the second direction. For example, the second direction array region (LR) may be defined as a virtual region that has the same width as the horizontal direction length of at least one light emitting element (200) and extends from the second side portion (3220) of the main region (3100) and the side region (3200) along the vertical direction.

[0106] The second direction array regions (LR) may be provided in multiple numbers or as multiple regions. In addition, the multiple second direction array regions (LR) are spaced apart from each other in the first direction, and at least a portion of the multiple light emitting elements (200) may be arranged in a region where the multiple first direction array regions (WR), the multiple second direction array regions (LR), and the main region (3100) overlap. In addition, the number of the second direction array regions (LR) may be greater than the number of the first direction array regions (WR).

[0107] Another portion of the plurality of low-reflective patterns (3300) may be arranged in an area where the second directional array area (LR) and the side area (3200) overlap. For example, another portion of the plurality of low-reflective patterns (3300) may be arranged in an area where the second directional array area (LR) and the second side area (3220) overlap in the second side portion (3220).

[0108] Another part of the plurality of low-reflective patterns (3300) may be arranged in a side area (3200) other than the second direction array area (LR). In addition, at least a part of the low-reflective patterns (3300) arranged in an area where the second direction array area (LR) and the side area (3200) overlap may be larger in size or may be arranged more densely than the low-reflective patterns (3300) arranged in the side area (3200) other than the second direction array area (LR). For example, another part of the plurality of low-reflective patterns (3300) may be arranged in an area where the second direction array area (LR) and the second side area (3220) overlap in the second side portion (3220). In addition, another part of the plurality of low-reflective patterns (3300) may be arranged in a second side portion (3220) other than the second direction array area (LR) in the second side portion (3220). In addition, at least a portion of the low-reflection pattern (3300) arranged in an area where the second direction array area (LR) and the second side portion (3220) overlap may be larger in size or arranged more densely than the low-reflection pattern (3300) arranged in the second side portion (3220) other than the second direction array area (LR).

[0109] The low-reflection pattern (3300) disposed in the area where the second direction array area (LR) and the second side area (3220) overlap in the second side portion (3220) may be referred to as a second region inner pattern. In addition, the low-reflection pattern (3300) disposed in the second side portion (3220) other than the second direction array area (LR) in the second side portion (3220) may be referred to as a second region outer pattern. In addition, at least a portion of the second region inner pattern may be larger in size or disposed more densely than the second region outer pattern.

[0110] The average area of ​​the low-reflection pattern (3300) arranged on the first side portion (3210) may be larger than the average area of ​​the low-reflection pattern (3300) arranged on the second side portion (3220). In addition, the ratio of the sum of the areas of the low-reflection patterns (3300) arranged on the first side portion (3210) to the total area of ​​the first side portion (3210) may be larger than the ratio of the sum of the areas of the low-reflection patterns (3300) included in the second side portion (3220) to the total area of ​​the second side portion (3220).

[0111] The low-reflection pattern (3300) may further include a third pattern (3330) and a fourth pattern (3340). The third pattern (3330) may be arranged within a second distance (L2) from the main area (3100) in the second side portion (3220). In addition, the second distance (L2) may be half of the length of the second side portion (3220) in the second direction. The second distance (L2) may be half of the length of the second side portion (3220) in the vertical direction. The number of the third patterns (3330) may be less than the number of the fourth patterns (3340). In addition, the density of the third patterns (3330) may be less than the density of the fourth pattern (3340). The fourth pattern (3340) may be placed at a distance from the main area (3100) greater than the second distance (L2) in the second side section (3220).

[0112] Meanwhile, in addition to this configuration, according to the fifth embodiment of the present invention, at least some of the plurality of low-reflection patterns (3300) may be arranged in a curved shape having a convex shape on one side or the other side in the first direction.

[0113] Hereinafter, a fifth embodiment will be described with reference to FIG. 15. In describing the fifth embodiment of the present invention, compared to the above-described embodiments, there is a difference in that at least some of the plurality of low-reflection patterns (3300) are arranged in a curved shape having a convex shape on one side or the other side in the first direction. This difference will be mainly described, and the same description and drawing reference numerals will be used in the above-described embodiments.

[0114] Referring to FIG. 15, at least some of the plurality of low-reflective patterns (3300) may be arranged in a curved shape having a convex shape on one side or the other side in the first direction. For example, at least some of the plurality of low-reflective patterns (3300) may be arranged in a curved shape having a convex shape on one side or the other side in the horizontal direction on the first side portion (3210). In addition, at least some of the plurality of low-reflective patterns (3300) may be arranged in a curved shape having a convex shape on one side or the other side in the first direction and spaced apart from each other in the first direction. For example, at least some of the plurality of low-reflective patterns (3300) may be arranged in a curved shape having a convex shape on one side or the other side in the horizontal direction and spaced apart from each other in the horizontal direction on the first side portion (3210).

[0115] A plurality of low-reflective patterns (3300) may be arranged in the side region (3200) so as to be symmetrical with respect to a virtual first direction center line (CL1) extending in a first direction while passing through the center of the reflective sheet (300). For example, a plurality of low-reflective patterns (3300) may be arranged in the first side portion (3210) of the side region (3200) so as to be symmetrical with respect to a virtual first direction center line (CL1) extending in a horizontal direction while passing through the center of the reflective sheet (300). In addition, a plurality of low-reflective patterns (3300) may be arranged in the side region (3200) so as to be symmetrical with respect to a virtual second direction center line (CL2) extending in a second direction while passing through the center of the reflective sheet (300). For example, a plurality of low-reflection patterns (3300) may be arranged on the first side portion (3210) of the side region (3200) so as to be symmetrical with respect to a virtual second direction center line (CL2) extending vertically through the center of the reflective sheet (300).

[0116] Meanwhile, in addition to this configuration, according to the sixth embodiment of the present invention, the size of the plurality of low-reflection patterns (3300) may become smaller as the distance from the light-emitting element (200) increases.

[0117] Hereinafter, a sixth embodiment will be described with reference to FIG. 16. In describing the sixth embodiment of the present invention, there is a difference in that, compared to the above-described embodiments, the size of the plurality of low-reflection patterns (3300) becomes smaller as the distance from the light-emitting element (200) increases. Therefore, the description will focus on this difference, and the same description and drawing reference numerals will be used in the above-described embodiments.

[0118] Referring to Fig. 16, the size of the plurality of low-reflective patterns (3300) may become smaller as the distance from the light-emitting element (200) increases. For example, the plurality of low-reflective patterns (3300) may have a convex shape on one side or the other side in the horizontal direction and may be arranged in a plurality of curved shapes spaced apart from each other in the horizontal direction on the first side portion (3210), and the size of the plurality of low-reflective patterns (3300) may become smaller as the distance from the light-emitting element (200) increases. The plurality of low-reflective patterns (3300) may be arranged in a fan shape. The plurality of low-reflective patterns (3300) may form one area, and the widths of both sides of one area may be shaped to widen as they go toward the outer edge of the reflective sheet (300). Therefore, the reflectivity may be adjusted depending on the distance from the light-emitting element (200).

[0119] Although the embodiments of the present invention have been described as specific embodiments, these are merely examples, and the present invention is not limited thereto, but should be construed to have the widest scope in accordance with the technical concept disclosed in this specification. Those skilled in the art may implement a low-reflection pattern of an unspecified shape by combining / substituting the disclosed embodiments, but this also does not depart from the scope of the present invention. In addition, those skilled in the art may easily modify or alter the disclosed embodiments based on this specification, and it is clear that such modifications or alterations also fall within the scope of the present invention.

Claims

1. Circuit board; a plurality of light emitting elements connected to the circuit board; and It includes a reflective sheet that reflects light emitted from the plurality of light-emitting elements and has a plurality of reflective cells formed thereon, each of which accommodates the plurality of light-emitting elements. The above plurality of reflective cells include a plurality of low-reflection patterns, The above plurality of low-reflection patterns have a size of a pattern positioned close to the edge of the reflective sheet that is relatively smaller than that of other patterns. Light-emitting device.

2. In paragraph 1, The reflection area of ​​the above plurality of reflective cells increases as they are positioned closer to the edge of the reflective sheet. Light-emitting device.

3. In paragraph 1, The element area ratio, which is the ratio of the light-emitting area of ​​the light-emitting element to the area of ​​the low-reflection pattern of the plurality of reflective cells, increases as it is arranged closer to the edge of the reflective sheet. Light-emitting device.

4. In paragraph 1, The above light-emitting element and the above reflective cell are arranged in a grid shape, The sum of the areas of the above low-reflection patterns of the above reflective cells in the edge row is, A plurality of the areas of the low-reflection patterns of the above reflective cells passing through the center of the above reflective sheet are smaller than the sum of the areas of the above reflective cells. Light-emitting device.

5. In paragraph 1, The above reflective sheet is, Zone 1; a second zone positioned closer to the edge of the reflective sheet than the first zone; and Including a third zone arranged closer to the edge of the reflective sheet than the second zone; The above multiple low-reflection patterns are, A first low-reflection pattern included in the reflective cell arranged in the first zone; A second low-reflection pattern included in the reflective cell arranged in the second zone; and Includes a third low-reflection pattern included in the reflective cell arranged in the third zone, The area of ​​the third low-reflection pattern is smaller than the area of ​​the second low-reflection pattern, and the area of ​​the second low-reflection pattern is smaller than the area of ​​the first low-reflection pattern. Light-emitting device.

6. In paragraph 5, The curvature of the first low-reflection pattern and the curvature of the second low-reflection pattern are different from the curvature of the third low-reflection pattern. Light-emitting device.

7. In paragraph 5, The above reflective cell is, A device arrangement section in which the light-emitting device is arranged; and Further comprising a portion forming a boundary with the adjacent reflective cell, The portion of the reflective cell arranged in the first zone and the second zone has a shape or area different from the shape of the first low-reflection pattern and the second low-reflection pattern, The above-mentioned portion of the reflective cell arranged in the above-mentioned third zone has a shape corresponding to the shape of the above-mentioned third low-reflection pattern, The third low-reflection pattern has a shape corresponding to the light-emitting element. Light-emitting device.

8. In paragraph 7, The above-mentioned portion has a sloped surface that is inclined at the above-mentioned element arrangement portion. Light-emitting device.

9. In paragraph 7, The upper surface or height of the above-mentioned portion is higher than that of the light-emitting element. Light-emitting device.

10. In paragraph 7, The distance between the edge of the above-mentioned portion of the above-mentioned plurality of reflective cells and the edge of the above-mentioned low-reflection pattern increases as the distance between the edge ... Light-emitting device.

11. In paragraph 1, The distance between the edge of the light emitting element accommodated in the plurality of reflective cells and the edge of the low-reflection pattern becomes smaller as it is arranged closer to the edge of the reflective sheet. Light-emitting device.

12. In paragraph 5, The light emitting element accommodated in the reflective cell arranged in the first zone has a different beam angle, luminous intensity, or peak wavelength from the light emitting element accommodated in the reflective cell arranged in the third zone. Light-emitting device.

13. Circuit board; a plurality of light emitting elements connected to the circuit board; and A reflective sheet is included that reflects light emitted from the plurality of light-emitting elements and accommodates the plurality of light-emitting elements. The above reflective sheet comprises a plurality of low-reflective patterns, The above plurality of low-reflection patterns have a size of a pattern positioned farther away from the light-emitting element that is relatively smaller than that of other patterns. Light-emitting device.

14. In paragraph 13, The distance between the plurality of low-reflection patterns increases as they are positioned farther away from the light-emitting element. Light-emitting device.

15. In paragraph 13, One of the plurality of low-reflective patterns is smaller in size than another one of the plurality of low-reflective patterns. Light-emitting device.

16. In paragraph 13, The density of the low-reflection pattern arranged relatively adjacent to the light-emitting element among the plurality of low-reflection patterns is greater than the density of the low-reflection pattern arranged relatively spaced from the light-emitting element among the plurality of low-reflection patterns. Light-emitting device.

17. In paragraph 13, The above light emitting element, A light emitting diode chip connected to the above circuit board; and Including a light-transmitting portion covering the light-emitting diode chip, Light-emitting device.

18. In paragraph 13, The above light emitting element, A package substrate connected to the above circuit board; A chip arrangement layer positioned above the above package substrate and having a chip arrangement space formed therein; A fluorescent layer arranged in the above chip arrangement space; A light emitting diode chip arranged on the fluorescent layer so as to be connected to the package substrate; and Including a light-transmitting portion covering the above package substrate, the chip arrangement layer, and the fluorescent layer. Light-emitting device.

19. In paragraph 15, The above light emitting element, A package substrate connected to the above circuit board; A fluorescent layer positioned above the package substrate; A light emitting diode chip arranged on the fluorescent layer so as to be connected to the package substrate; and Including a reflective layer positioned above the fluorescent layer, Light-emitting device.

20. A light-emitting device that emits light; and A panel for controlling light emitted from the light emitting device is included, The above light emitting device, circuit board; a plurality of light emitting elements connected to the circuit board; and It includes a reflective sheet that reflects light emitted from the plurality of light-emitting elements and has a plurality of reflective cells formed thereon, each of which accommodates the plurality of light-emitting elements. The above plurality of reflective cells include a plurality of low-reflection patterns, The above multiple low-reflection patterns become smaller in size, have lower saturation, or have lower brightness as they are positioned closer to the edge of the reflective sheet. display.

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