KR-102963762-B1 - LIGITH EMITTING MOUDLE, LIGHTING DEVICE HAVING THEREOF, AND TAILLAMP

KR102963762B1KR 102963762 B1KR102963762 B1KR 102963762B1KR-102963762-B1

Abstract

The lighting device disclosed in an embodiment of the invention comprises a substrate; a reflective member disposed on the substrate; a plurality of light-emitting elements disposed on the substrate; a resin layer disposed on the reflective member; and an optical pattern portion having a plurality of concave portions formed concavely on the upper surface of the resin layer, wherein the plurality of light-emitting elements are spaced apart in a first direction in which light is emitted, and the optical pattern portion may include a pattern portion in which the width of the concave portions is reduced in a first direction at a position overlapping with the center of each of the plurality of light-emitting elements, and the optical pattern portion may include a pattern portion in which the width of the concave portions is reduced in both directions from the center of the optical pattern portion to a second direction.

Inventors

임의진
진경일

Assignees

엘지이노텍 주식회사

Dates

Publication Date: 20260513
Application Date: 20200520

Claims (10)

Substrate; A reflective member disposed on the above substrate; A plurality of light-emitting elements disposed on the above substrate; A resin layer disposed on the above-mentioned reflective member; and It includes a plurality of optical pattern portions having a plurality of concave portions formed concavely on the upper surface of the resin layer, and The plurality of light-emitting elements are spaced apart in a first direction in which light is emitted, and The plurality of optical pattern portions are spaced apart in the first direction, and Each of the above plurality of optical pattern portions is positioned at a location that overlaps in a vertical direction with the center of each of the plurality of light-emitting elements, and includes a first pattern portion including a first concave portion. Each of the plurality of optical pattern portions includes a second pattern portion that is spaced apart from the first pattern portion in the first direction or in a second direction orthogonal to the first direction and includes a second concave portion having a width smaller than the width of the first concave portion. The above vertical direction is a direction from the lower surface of the substrate toward the upper surface of the resin layer, and Each of the above plurality of light-emitting elements has an emission surface that emits light of the highest intensity toward the first direction, and A lighting device in which the position of the emission surface of each of the plurality of light-emitting elements is positioned adjacent to one side of the first direction of each optical pattern part, rather than the position overlapping with the center of each optical pattern part in the vertical direction.
In paragraph 1, The first pattern portion has a plurality of first concave portions arranged in the first and second directions, and A lighting device having a plurality of second concave portions arranged in the first and second directions, wherein the second pattern portion is a second pattern portion.
In paragraph 2, The first pattern portion includes a first convex portion disposed between the plurality of first concave portions, and A lighting device comprising a second pattern portion including a second convex portion disposed between the plurality of second concave portions.
In paragraph 3, A lighting device in which the first pattern portion adjacent to each of the above-mentioned light-emitting elements has a width of each of the first concave portions greater than the width of the first convex portion.
In paragraph 3, A lighting device in which the second pattern portion, which is the most spaced from the center of each light-emitting element among the first and second pattern portions, has a width of each of the second concave portions that is equal to or smaller than the width of the second convex portion.
In any one of paragraphs 1 through 5, A lighting device in which the plurality of first and second concave portions disposed in each of the above optical pattern portions have the same depth.
In any one of paragraphs 1 through 5, The plurality of first and second concave portions disposed in each of the above optical pattern portions have different depths, and A lighting device in which the depths of the first and second concave portions are such that the first concave portion of the first pattern portion positioned above each light-emitting element is the largest, and the depths of the second concave portions of the second pattern portion positioned on the outer edge of each optical pattern portion are the smallest.
In any one of paragraphs 1 through 5, A lighting device in which the first and second concave portions are polygonal columns or columns having a curved surface on the lower side.
In any one of paragraphs 1 through 5, A lighting device in which each of the above optical pattern sections has a maximum length in the first direction that is smaller than the maximum length in the second direction.
In any one of paragraphs 1 through 5, Each of the above optical pattern portions is respectively positioned on the upper part of each of the light-emitting elements, and A lighting device in which the area of each optical pattern portion is in the range of 6 to 18 times the area of each light-emitting element.

Description

Light Emitting Module, Lighting Device Having Thereof, and Taillamp An embodiment of the invention relates to a lighting module having a plurality of light sources and a lighting device having the same. Lighting applications include not only automotive lighting but also backlights for displays and signage. Light-emitting devices, such as light-emitting diodes (LEDs), have advantages over conventional light sources like fluorescent lamps and incandescent lamps, including low power consumption, a semi-permanent lifespan, fast response speed, safety, and environmental friendliness. These light-emitting diodes are applied in various lighting devices, such as display devices, indoor lights, or outdoor lights. Lamps employing light-emitting diodes (LEDs) as automotive light sources are being proposed. Compared to incandescent bulbs, LEDs offer advantages in terms of lower power consumption; their small size allows for greater design freedom, and their semi-permanent lifespan provides economic benefits. However, because the emission angle of light from LEDs is small, there is a need to increase the light-emitting surface area when using LEDs for automotive lamps. FIG. 1 is an example of a plan view of a lighting device according to an embodiment of the invention. Figure 2 is a partial enlarged view of the resin layer of Figure 1. FIG. 3 is a drawing showing an example of a concave portion of an optical pattern portion according to an embodiment of the invention. FIG. 4 is a drawing showing an example of deformation of the concave portion of the optical pattern portion according to an embodiment of the invention. FIG. 5 is an example of a side cross-sectional view in the first direction of the lighting device of FIG. 1. Figure 6 is an enlarged view of area A1 of Figure 5. FIG. 7 is a first example of the optical pattern portion of the invention, showing the region A2 of FIG. 2 and FIG. 5 viewed in a planar view. Figure 8 is a side cross-sectional view of A-A' of Figure 7, which is the A2 area of Figure 5. Figure 9 is an example of a side cross-sectional view of B-B' in Figure 7. FIG. 10 is a drawing showing an example of a lighting module having a resin layer having a second example of an optical pattern portion of the invention. FIG. 11 is a cross-sectional view along the C-C' side of FIG. 10. FIG. 12 is a cross-sectional view along the D-D' side of FIG. 10. FIG. 13 is a drawing showing an example of a lighting module having a resin layer having a third example of the optical pattern portion of the invention. FIG. 14 is a cross-sectional view along the E-E' side of FIG. 13. FIG. 15 is a cross-sectional view along the F-F' side of FIG. 13. FIG. 16 is a fourth example of the optical pattern portion of the invention, and is an example of a cross-sectional view along A-A' in FIG. 5. FIG. 17 is a fourth example of the optical pattern portion of the invention, and is an example of a cross-sectional view along B-B' in FIG. 5. Figure 18 (a) is a light distribution of a comparative example, and (b), (c), and (d) are diagrams showing the light distribution in examples of optical pattern parts. FIG. 19 is a drawing showing an example of a plan view of a vehicle having the lighting device of the invention. Figure 20 is an example of a taillight of a vehicle to which the lighting device of Figure 19 is applied. Hereinafter, preferred embodiments of the invention will be described in detail with reference to the attached drawings. The technical concept of the present invention is not limited to the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted. Furthermore, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a meaning generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms used generally, such as those defined in advance, may be interpreted by considering their meaning in the context of the relevant technology. Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention. In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C. In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the component from other components and do not determine the essence, order, or sequence of the component. Furthermore, when it is stated th