KR20230143099A - Lighting device and vehicle lamp - Google Patents

Abstract

A lighting device disclosed in an embodiment of the invention includes a substrate; a plurality of light sources arranged in a second direction on the substrate; a lighting module having a light guide disposed on the substrate and the light sources; An optical lens disposed on the lighting module and having an incident surface having a width greater than a width of the lighting module in a first direction, and an exit surface through which light incident on the incident surface is emitted; and a reflective member having an insertion hole in which the light guide part is disposed, a reflection part extending to both sides of the insertion hole and covering both sides of the light guide part, and a support part supporting a lower edge of the optical lens, the light guide part and The insertion hole may have a width in the first direction smaller than a length in the second direction, and an upper end of the reflecting unit may be positioned higher than an upper end of the light guide unit.

Description

Lighting devices and vehicle lamps {LIGHTING DEVICE AND VEHICLE LAMP}

The embodiment relates to a lighting device having a light source.

The embodiment relates to a vehicle lamp with a lighting device.

Typical lighting applications include backlights for displays and signage, as well as automotive lights. Light-emitting devices, such as light-emitting diodes (LEDs), have advantages such as low power consumption, semi-permanent lifespan, fast response speed, safety, and environmental friendliness compared to existing light sources such as fluorescent lamps and incandescent lamps. These light emitting diodes are applied to various lighting devices such as various display devices, indoor lights, or outdoor lights.

Recently, lamps employing light-emitting diodes have been proposed as light sources for vehicles. Compared to incandescent lamps, light emitting diodes have an advantage in that they consume less power. However, because the emission angle of light emitted from a light emitting diode is small, when a light emitting diode is used as a vehicle lamp, there is a need to increase the light emitting area of the lamp using the light emitting diode. Because light emitting diodes are small in size, they can increase the design freedom of lamps and are economical due to their semi-permanent lifespan.

Embodiments of the invention provide a lighting device with improved light distribution image.

An embodiment of the invention provides a lighting device with a line width and a flexible material for daytime running lights (DRL).

An embodiment of the invention can provide a lamp for a vehicle, such as a moving object, having the above lighting device.

A lighting device according to an embodiment of the invention includes a substrate having a length in a second direction longer than a width in the first direction; a plurality of light sources arranged in a second direction on the substrate; a lighting module having a light guide disposed on the substrate and the light sources; An optical lens disposed on the lighting module and having an incident surface having a width greater than a width of the lighting module in a first direction, and an exit surface through which light incident on the incident surface is emitted; and a reflective member having an insertion hole in which the light guide part is disposed, a reflection part extending to both sides of the insertion hole and covering both sides of the light guide part, and a support part supporting a lower edge of the optical lens, the light guide part and The insertion hole may have a width in the first direction smaller than a length in the second direction, and an upper end of the reflecting unit may be positioned higher than an upper end of the light guide unit.

According to an embodiment of the invention, the exit surface of the optical lens may refract light incident on the entrance surface into parallel light.

According to an embodiment of the invention, it includes a diffusion layer that diffuses light on the light guide part, and the top of the diffusion layer may be located higher than the top of the reflection part.

According to an embodiment of the invention, the diffusion layer is spaced apart from the incident surface of the light guide, the width of the diffusion layer in the first direction is equal to the width of the light guide in the first direction, and the length in the second direction is equal to the width of the light guide in the first direction. It may be equal to the length in two directions.

According to an embodiment of the invention, the incident surface may be any one of a concave curved surface, a convex curved surface, or a flat surface in the minor axis direction.

According to an embodiment of the invention, the emission surface may have a hemispherical shape or a Fresnel lens pattern.

According to an embodiment of the invention, a housing is included under the reflective member, and the reflective member may include a first recess in which the substrate is accommodated and a second recess in which the upper part of the housing is accommodated.

According to an embodiment of the invention, the reflective member may have a concave groove between the support portion and the reflective portion.

According to an embodiment of the invention, the material of the optical lens is PMMA or PC, and the light guide seals the light sources and may be formed of silicon or epoxy material.

According to an embodiment of the invention, the width of the light guide in the first direction may be in the range of 3 mm to 7 mm, and the length of the light guide in the second direction may be 50 times or more than the width in the first direction.

A lighting device according to an embodiment of the invention includes a substrate; a plurality of light sources arranged in one direction on the substrate; a lighting module covering the plurality of light sources and having a light guide portion having a length longer than the width and a diffusion layer disposed on the light guide portion; an optical lens disposed on the lighting module, having an entrance surface having a width greater than that of the lighting module, and an exit surface through which light incident on the entrance surface is emitted; and a reflection member having an insertion hole into which the light guide part is inserted, a reflection part extending on both sides of the insertion hole and disposed along the circumference of the light guide part, and a support part supporting a lower edge of the optical lens, wherein the light guide part and the length of the insertion hole is at least twice as large as the width, the reflection portion of the reflection member is disposed along both long sides and both short sides of the light guide, and the lighting module and the optical lens are located along the length of the lighting module in the longitudinal direction. It can have ductility in the thickness direction and width direction.

According to an embodiment of the invention, the top of the reflector may be located higher than the top of the light guide and lower than the top of the diffusion layer.

According to an embodiment of the invention, the reflective member may have a concave groove between both outer sides of the inner reflective portion and both inner sides of the outer support portion.

According to an embodiment of the invention, the emission surface of the optical lens may emit parallel light.

A lighting device according to an embodiment of the invention includes a substrate whose length in a second direction is longer than its width in the first direction; a plurality of light sources arranged in a second direction on the substrate; a light guide disposed on the substrate and covering the plurality of light sources; a diffusion layer disposed on the light guide part; an optical lens spaced apart from the diffusion layer and having an incident surface having a width greater than a width of the diffusion layer in a first direction, and an exit surface through which light incident on the incident surface is emitted; and a reflection member having an insertion hole in which the light guide part and the diffusion layer are disposed, first and second reflection parts extending to both sides of the insertion hole, and a support part supporting both ends of the optical lens, The upper width of the diffusion layer in the first direction may be smaller than the lower width of the diffusion layer.

According to an embodiment of the invention, the diffusion layer includes a first region having a width equal to the width of the light guide portion, and a second region having a width smaller than the width of the light guide portion on the first region, and the diffusion layer includes a first region having a width less than the width of the light guide portion. The outer surface of area 2 may include a curved or inclined surface.

According to an embodiment of the invention, the thickness of the second area may be greater than the thickness of the first area.

According to an embodiment of the invention, the reflective member includes first and second protrusions protruding inward from one side and the other side of the second area, and the area between the first and second protrusions is an upper surface of the second area. You can expose it.

According to an embodiment of the invention, the width of the incident surface of the optical lens in the first direction may be in the range of 1.5 to 4.5 times the upper width of the diffusion layer.

A vehicle lamp according to an embodiment of the invention includes the lighting device disclosed above, and the lighting device may be arranged as a line-shaped daytime running light.

According to a lighting device according to an embodiment of the invention, luminous intensity and image can be improved, and various light distribution images can be provided.

According to a lighting device according to an embodiment of the invention, lighting having a line width applicable to daytime running lights can be provided. Additionally, it is possible to provide uniform light distribution of line lighting.

Embodiments of the invention improve the light distribution of a lighting device and allow lighting images to be used in various forms.

The optical reliability of the lighting device according to the embodiment of the invention can be improved.

The reliability of vehicle lamps according to embodiments of the invention can be improved.

Embodiments of the invention can be applied to light units with lighting devices, or to external or internal lighting lamps.

1 is a side cross-sectional view of a lighting device according to an embodiment.
FIG. 2 is a partially enlarged view of the lighting device of FIG. 1.
Figure 3 is an example of a top view of the lighting device of Figure 1.
Figures 4(A)-(C) are diagrams showing examples of optical lenses in the lighting device of Figure 1.
FIG. 5 is a diagram explaining the light extraction path of the lighting device of FIG. 1.
6 to 8 are diagrams showing the shape, luminous intensity, and light distribution image according to each direction or position according to the shape of the optical lens in the lighting device of the invention.
Figure 9 is a diagram comparing the luminous intensity according to the difference in the width of the optical lens in the lighting device according to an embodiment of the invention.
Figures 10 and 11 are diagrams comparing differences in luminance depending on the height of a lighting module in a lighting device according to an embodiment of the invention.
Fig. 12 is a first modified example of the side cross-sectional view of the lighting device of Fig. 1;
Figure 13 is a partial enlarged view of Figure 12.
FIG. 14 is a diagram showing light distribution images according to each direction or position on the optical lens of FIG. 12.
FIG. 15 is a diagram showing the luminous intensity of the lighting device of FIG. 12.
FIG. 16 is a side cross-sectional view showing a second modified example of the lighting device of FIG. 1.
FIG. 17 is a diagram showing light distribution images according to each direction or position on the optical lens of FIG. 16.
FIG. 18 is a diagram showing the luminous intensity of the lighting device of FIG. 16.
FIG. 19 is a side cross-sectional view showing a third modified example of the lighting device of FIG. 1.
FIG. 20 is a diagram showing light distribution images according to each direction or position on the optical lens of FIG. 19.
FIG. 21 is a diagram showing the luminous intensity of the lighting device of FIG. 19.
Figure 22 is a diagram comparing light uniformity according to the height of the lighting module in the lighting device according to an embodiment of the invention.
Figure 23 is a diagram showing a lamp having a lighting device according to an embodiment of the invention.
Figure 24 is an example of the vehicle taillight of Figure 23.
Figure 25 is a diagram for explaining vehicle running lights to which the lighting device of the invention is applied.

Hereinafter, preferred embodiments of the invention will be described in detail with reference to the attached drawings.

The technical idea of the present invention is not limited to some of the described embodiments, but can be implemented in various different forms, and one or more of the components between the embodiments can be selectively combined as long as it is within the scope of the technical idea of the present invention. , can be used as a replacement. In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless specifically defined and described, are generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as meaning, and the meaning of commonly used terms, such as terms defined in a dictionary, can be interpreted by considering the contextual meaning of the related technology. Additionally, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular may also include the plural unless specifically stated in the phrase, and when described as "at least one (or more than one) of A and B and C", it is combined with A, B, and C. It can contain one or more of all possible combinations. Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the essence, order, or order of the component is not determined by the term. And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also is connected to the other component. It may also include cases where other components are 'connected', 'coupled', or 'connected' by another component between them. Additionally, when described as being formed or disposed "above" or "below" each component, "above" or "below" refers not only to cases where two components are in direct contact with each other, but also to one This also includes cases where another component described above is formed or placed between two components. In addition, when expressed as "top (above) or bottom (bottom)", it can include not only the upward direction but also the downward direction based on one component.

The lighting device according to the invention can be applied to various lamp devices that require lighting, such as vehicle lamps, household lighting devices, and industrial lighting devices. For example, when applied to vehicle lamps, head lamps, side mirror lights, side maker lights, fog lights, tail lights, brake lights, daytime running lights, vehicle interior lights, door scars, rear lights. Applicable to combination lamps, backup lamps, etc. The lighting device of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various electric train fields. In addition, it can be applied to all lighting-related fields or advertising-related fields that are currently developed and commercialized or can be implemented in the future according to technological development. It will be said that it is.

<Lighting device>

FIG. 1 is a side cross-sectional view of a lighting device according to an embodiment, FIG. 2 is a partial enlarged view of the lighting device of FIG. 1, FIG. 3 is an example of a top view of the lighting device of FIG. 1, and (A)-( in FIG. 4 C) is a diagram showing examples of optical lenses in the lighting device of FIG. 1, and FIG. 5 is a diagram explaining a light extraction path of the lighting device of FIG. 1.

1 to 5, a lighting device 100 according to an embodiment of the invention includes a lighting module 10 and an optical lens 51. The lighting module 10 may include a substrate 11, a light source 13 arranged on the substrate 11, and a light guide 15 covering the light source 13. The lighting module 10 may further include a diffusion layer 17 on the light guide part 15.

The lighting module 10 may have an upper width D1 in the first direction (X) that is smaller than a length in the second direction (Y). The lighting module 10 may provide line light having a narrow upper width D1 and a long length in the second direction Y, and the line light has an upper width D1 of the lighting module 10 and It has the same width and can emit light with uniform surface light distribution. In the drawing, the X direction may be a first direction, the Y direction may be a second direction orthogonal to the It could be a direction.

The height T1 of the lighting module 10 may be greater than the width D1 in the first direction (X) and less than the length in the second direction (Y). Here, the ratio of the height (T1) and the width (D1) may be arranged from 4:3 to 10:3, and the height (T1) may be 4 mm or more, for example, in the range of 4 mm to 10 mm, The width D1 may be 7 mm or less, for example, in the range of 3 mm to 7 mm or in the range of 4 mm to 6.5 mm. The height T1 may be 1.3 times or more, for example, 1.3 to 3 times or 1.3 to 2.5 times the width D1. Since the lighting module 10 has a thin width D1, the lighting module 10 may have the flexibility to be deformed to be convex or concave in the first direction (X) with respect to the second direction (Y). Additionally, since the lighting module 10 has a low height T1, the lighting module 10 may have the flexibility to be deformed to be convex or concave in the third direction (Z) with respect to the second direction (Y). Additionally, the optical lens 51 and the lighting module 10 may be flexible in the same direction.

The substrate 11 of the lighting module 10 may include a printed circuit board (PCB). The board 11 may include, for example, at least one of a resin-based printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or an FR-4 board. . When the substrate 11 is a flexible PCB, the lighting device 100 having the lighting module 10 can be provided in a flexible manner.

The substrate 11 may be electrically connected to the light source 13. The substrate 11 includes a wiring layer (not shown) on the top, and the wiring layer may be electrically connected to the light source 13. When a plurality of light sources 13 are arranged on the substrate 11, the plurality of light sources 13 may be connected in series, parallel, or series-parallel by the wiring layer. The substrate 11 may function as a base member or support member disposed below the light source 13 and the light guide portion 15.

The upper surface of the substrate 11 may have an X-Y plane. The upper surface of the substrate 11 may be flat or may have a curved surface. The thickness of the substrate 11 may be the height in the vertical direction or the Z direction. When a plurality of light sources 13 are disposed on the substrate 11, they may be arranged in the second direction (Y).

The substrate 11 may be made of a flexible material, and the flexible substrate may be in close contact with the housing of a lamp in a vehicle. The substrate 11 may include a light-transmissive material that transmits light through the upper and lower surfaces. The light-transmitting material may include at least one of PET (polyethylene terephthalate), PS (polystyrene), and PI (polyimide).

A reflective layer (not shown) may be disposed on the substrate 11. The reflective layer is disposed between the substrate 11 and the light guide part 15 and can reflect incident light. The reflective layer may include a metallic material or a non-metallic material. The metallic material may include metals such as aluminum, silver, and gold. The non-metallic material may include a plastic material or a resin material.

The width of the substrate 11 in the first direction (X) within the lighting module 10 may be greater than the upper width (D1) of the lighting module 10. The width of the substrate 11 in the first direction (X) may be greater than the width (D1) of the lighting module 10. Here, the width of the lighting module 10 may be the upper width of the light guide part 15 or the upper width of the diffusion layer 17.

The light source 13 is disposed between the substrate 11 and the light guide portion 15 and emits light through the top surface or through the top surface and side surfaces. The plurality of light sources 13 may be arranged along the longitudinal direction or the second direction (Y) of the substrate 11. The light source 13 may be disposed below the light guide portion 15, and may be arranged in one row or two rows along the longitudinal direction of the lighting module 10. The light source 13 may be embedded within the light guide portion 15. That is, the light guide portion 15 seals the light source 13. The upper surface of the light source 13 may be disposed above the lower surface of the light guide 15, and multiple side surfaces and upper surfaces of the light source 13 may be in contact with the light guide 15.

The light source 13 emits light with the highest intensity in the third direction (Z) or the optical axis direction. The light source 13 is electrically connected to the substrate 11 and may be provided as an LED chip or a package that covers the surface of the LED chip with resin. The light source 13 is a light-emitting device having a light-emitting diode (LED), and may include a package in which a light-emitting chip is packaged. The light emitting chip may emit at least one of blue, red, green, ultraviolet (UV), or infrared rays, and the light source 13 may emit at least one of white, blue, red, green, or infrared rays. , for example, may emit color such as white, blue, or green.

The light guide portion 15 may be disposed on a portion of the upper surface of the substrate 11 . The lower surface of the light guide portion 15 may face or contact the substrate 11 . The width D1 of the light guide 15 in the first direction (X) may be equal to the width of the lighting module 100 and may be smaller than the width of the substrate 11 in the first direction (X). there is. When a reflective layer is disposed on the upper surface of the substrate 11, the light guide portion 15 may be in contact with the reflective layer.

The length of the light guide part 15 in the second direction (Y) may be equal to or smaller than the length of the substrate 11 in the second direction. The length of the light guide 15 in the second direction (Y) may be the same as the length of the lighting module 10 or may be 80% or more of the length of the lighting module 10 or the substrate 11. As the light guide portion 15 extends long in the longitudinal direction, surface light having a line width can be provided through the lighting module 10. The length of the light guide 15 in the second direction (Y) is at least twice the width (D1) in the first direction (X), for example, in the range of 2 to 200 times or 50 to 200 times. can be provided. The width of the light guide portion 15 in the first direction (X) may be 7 mm or less, for example, in the range of 3 mm to 7 mm or 4 mm to 6.5 mm.

The lower surface area of the light guide part 15 may be smaller than the upper surface area of the substrate 11. Both sides of the light guide portion 15 may be disposed further outside than both sides of the light source 13. Accordingly, the light guide portion 15 can seal the light sources 13, prevent moisture from penetrating, and sufficiently diffuse light. Here, the outer area of the upper surface of the substrate 11 may be exposed from the lower surface of the light guide part 15.

The height or thickness T4 of the light guide part 15 may be 80% or more of the height T1 from the lower surface of the substrate 11 to the upper surface of the diffusion layer 17. That is, the thickness T4 of the light guide portion 15 may be 80% or more and less than 100% of the height T1 of the lighting module 10. Accordingly, the light guide part 15 can guide the light emitted from the light source 13 in the exit direction and improve the diffusion efficiency of light.

Both sides of the light guide portion 15 in the longitudinal direction, that is, the long sides, may be provided as vertical planes. A coating layer of a reflective material may be formed on both sides of the light guide portion 15. The coating layer of the reflective material reflects incident light toward the emission side and can suppress light loss.

The light guide portion 15 may be formed of a transparent material. The light guide portion 15 may include a resin material such as silicon or epoxy. The light guide portion 15 may include a thermosetting resin material, for example, PC, OPS, PMMA, PVC, etc. The light guide portion 15 may be formed of glass, but is not limited thereto. For example, the main material of the light guide portion 15 may be a resin material mainly made of urethane acrylate oligomer.

Since the light guide portion 15 is provided as a resin layer that guides light, it can be provided with a thinner thickness than a glass material and can be provided as a flexible plate. The light guide 15 may emit point light emitted from the light source 13 as line light or surface light having a line width.

The light guide part 15 may include a bead (not shown), and the bead may diffuse and reflect incident light, thereby increasing the amount of light. The bead is composed of one selected from silicon, silica, glass bubble, PMMA (polymethyl methacrylate), urethane, Zn, Zr, Al ₂ O ₃ , and acryl. It can be.

The light guide part 15 can protect the internal light source 13 and reduce the loss of light emitted from the light source 13. The light source 13 may overlap the emission surface of the light guide 15 in a vertical direction.

The diffusion layer 17 may be disposed on the light guide portion 15. The diffusion layer 17 can diffuse the light incident from the light guide part 15. The diffusion layer 17 may contain a diffusion agent therein, and the diffusion agent may include Al ₂ O ₃ , TiO ₂ , It may include at least one of SiO ₂ , ZnO, and ZrO ₂ . The diffusion layer 17 may be formed of transparent resin or translucent resin material. The diffusion agent in the diffusion layer 17 may be 8 wt% or more, for example, in the range of 8 wt% to 20 wt%. If it is less than the above range, hot spots may occur, and if it is larger than the above range, light extraction efficiency may be reduced. .

The thickness T5 or height of the diffusion layer 17 may be smaller than the thickness T4 or height of the light guide part 15, and may be less than 50% of the thickness T4 of the light guide part 15. The thickness (T5) or height of the diffusion layer 17 may be 1.5 mm or less, for example, in the range of 0.8 mm to 1.5 mm. When the diffusion layer 17 is in the above range, the diffusion effect can be improved and the decrease in luminance can be suppressed.

The lower surface of the diffusion layer 17 is adhered to the upper surface of the light guide part 15, and may extend long along the light guide part 15. The width of the diffusion layer 17 in the first direction may be equal to or smaller than the width D1 of the light guide 15 in the first direction, and the length of the second direction may be equal to or smaller than the width D1 of the light guide 15 in the first direction. It may be equal to or smaller than the length of . Since the diffusion layer 17 is disposed on the top of the lighting module 10, the problem of hot spots occurring on the top of the light source 13 can be suppressed.

The top surface of the diffusion layer 17 may have a convex curved surface. For example, the corner between the top surface and the side surface of the diffusion layer 17 may have a curved surface.

Here, the upper surface of the light guide 15 is provided as a flat or horizontal surface, and the upper surface of the diffusion layer 17 is provided as a convex curved surface, so that the incident light is transmitted to the incident surface 53 of the optical lens 51. Light can be transmitted to a wide area.

The optical lens 51 may be disposed on the lighting module 10. The optical lens 51 may be disposed on the diffusion layer 17 of the lighting module 10. The optical lens 51 may include an entrance surface 53 and an exit surface 55. A portion of the incident surface 53 faces the lighting module 10, and light emitted from the lighting module 10 is incident thereon. The incident surface 53 may be a concave curved surface, a convex curved surface, or a horizontal plane in the minor axis direction.

The exit surface 55 can refract the light incident through the entrance surface 53 when it is guided through the interior. The emission surface 55 can irradiate or condense parallel light. The emission surface 55 may be provided in a convex hemispherical shape or a shell shape. As another example, the emission surface 55 may include a Fresnel lens pattern. The optical lens 51 may be composed of a condenser lens, a parallel light lens, a collimator lens, or a Fresnel lens.

The incident surface 53 of the optical lens 51 is disposed on the upper part of the light guide part 15 and may face the upper surface of the diffusion layer 17. The incident surface 53 may be spaced apart from the upper surface of the diffusion layer 17. As the entrance surface 53 of the optical lens 51 is spaced apart from the upper surface of the diffusion layer 17, light diffused through the diffusion layer 17 can be incident on a wide area of the entrance surface 53. The gap G1 between the incident surface 53 and the diffusion layer 17 may be 0.01 mm or more, for example, in the range of 0.01 mm to 0.5 mm.

Here, the width D2 of the incident surface 53 is the width of the lower surface of the optical lens 51 and may be larger than the upper width D1 of the lighting module 10. It may be 1.5 times or more, for example, 1.5 to 10 times or 2 to 10 times the width (D1). The maximum width D2 of the optical lens 51 in the first direction (X) may be smaller than or different from the height T2. When the maximum width D2 of the optical lens 51 in the first direction (X) is greater than the height T2, the luminous intensity may decrease and the line width may increase. When the maximum width D2 of the optical lens 51 in the first direction (X) is smaller than the height T2, the luminous intensity may increase and the line width may decrease. Accordingly, the maximum width (D2) and height (T2) of the optical lens 51 in the first direction (X) can be adjusted to suit the light distribution image.

The length of the optical lens 51 in the second direction (Y) may be equal to or greater than the length of the lighting module 10. Accordingly, when viewed from the outside of the lighting device 100, the surface of the optical lens 51 is exposed, and the upper structure of the lighting module 10 may not be exposed.

The optical lens 51 may include a light-transmitting material, for example, PC, OPS, PMMA, PVC, etc. The optical lens 51 may include a resin material such as silicone or epoxy, or a thermosetting material. The refractive index of the optical lens 51 may be in the range of 1.4 to 1.6. Since the optical lens 51 has the above-mentioned material and refractive index, the incident light can be refracted in the target direction without loss.

The optical lens 51 may emit surface light having a line width of 30 mm or less in the first direction (X) and a long length in the second direction (Y). Accordingly, the external image of the lighting device 100 may be provided as an image having the above line width. That is, light can be emitted as an image with a line width, as shown in FIG. 24.

4 (A)-(C), the optical lens 51 has a concave curved shape based on the longitudinal direction, is provided in a convex curved shape, or has one end and the other end of the optical lens 51. They can have shapes twisted in opposite directions.

As shown in Figure 4 (A), the incident surface 53A of the optical lens 51 has a convex curved surface having a first radius of curvature in the minor axis direction, and as in (B), the incident surface 53B has a convex curved surface in the minor axis direction. In this case, it has a second radius of curvature that is larger than the first radius of curvature and has a convex curved surface. As shown in (C), the incident surface 53C has a third radius of curvature in the minor axis direction and has a concave curved surface. The first and second radii of curvature have a difference of 20 mm or more and have a positive radius of curvature, and the third radius of curvature has a negative radius of curvature and may have a difference of 20 mm or more from the first radius of curvature in absolute value. . The first radius of curvature is 50 mm or more, and the second and third radii of curvature are less than 50 mm and may be the same or have a difference of 5 mm or less.

The lighting device 100 may include at least one or both of a housing 31 and a reflective member 40 in order to be coupled to a moving object such as a vehicle. The housing 31 may support the lighting module 10 and the reflective member 40. The housing 31 supports the lower surface of the substrate 11 of the lighting module 10, and the extension parts 32 and 33 on both sides extending in width support the outer lower portion of the reflective member 40. The housing 31 may be a heat dissipation member.

The reflective member 40 has an insertion hole R1 therein and includes first and second bottom portions 41 and 41A disposed on both sides of the substrate 11. The first and second bottom portions 41 and 41A may be connected to each other on both short sides of the lighting module 10 in the longitudinal direction. The reflection member 40 includes first and second reflection parts 42 and 43 on both sides of the insertion hole R1, and the first and second reflection parts 42 and 43 are inside the insertion hole ( R1) and may protrude from the inside of the first and second bottom portions 41 and 41A toward the incident surface 53. The width of the insertion hole R1 in the first direction (X) may be smaller than the length of the insertion hole (R1) in the second direction (Y). The width of the insertion hole R1 in the first direction may correspond to the width of the light guide part 15 in the first direction, and the length of the insertion hole R1 in the second direction may correspond to the length of the light guide part 15 in the second direction. there is. The insertion hole R1 has a line shape in top view.

The first and second reflection units 42 and 43 may be disposed on both long sides of the light guide unit 15 . The first and second reflectors 42 and 43 may extend to both sides of the insertion hole R1. Accordingly, the first and second reflection parts 42 and 43 can reflect light incident on both long sides of the light guide part 15 and re-enter it into the light guide part 15. The first and second reflection parts 42 and 43 may be connected to each other on both short sides of the light guide part 15 in the longitudinal direction.

The reflective member 40 includes a concave portion C0 that is recessed, and the concave portion C0 may include an area lower than the incident surface 53 of the optical lens 51. The concave portion CO may be provided with a central interval G1 between the diffusion layer 17 and the incident surface 53. The gap G1 is a distance spaced apart in the vertical direction, the width of the area having the gap G1 is smaller than the width of the lower surface of the diffusion layer 17 in the first direction (X), and the length is in the second direction (Y ) may be equal to the length of the diffusion layer 17.

The top height G4 of the first and second reflection parts 42 and 43 is the height from the bottom of the first and second concave grooves C1 and C2, and can be placed higher than the top of the light guide part 15. there is. Accordingly, the first and second reflection parts 42 and 43 reflect light leaking through the side of the light guide part 15, thereby improving the light extraction efficiency of the lighting module 10. The first and second grooves C1 and C2 may be disposed on both sides of the concave portion C0. The first and second grooves C1 and C2 may be disposed on both sides of the concave portion C0 in the first direction (X). The first and second grooves C1 and C2 may be disposed on both sides of the concave portion C0 in the first and second directions.

The top height G4 of the first and second reflection parts 42 and 43 of the reflection member 40 may be disposed lower than the top of the diffusion layer 17. That is, the gap G2 between the first and second reflection parts 42 and 43 and the incident surface 53 may be larger than the gap G1 between the diffusion layer 17 and the incident surface 53. . Accordingly, the first and second reflection parts 42 and 43 reflect light incident through the side of the light guide part 15 and enable light to be emitted through the side of the diffusion layer 17. Additionally, the upper surfaces of the first and second reflection units 42 and 43 may reflect light emitted through the diffusion layer 17 to the incident surface 53 of the optical lens 51.

The reflective member 40 includes first and second lens supports 45 and 46, and the first and second lens supports 45 and 46 may be disposed along the outer edge of the optical lens 51. . The first and second lens supports 45 and 46 have stepped structures 45A and 46A that are concavely stepped inward from the top, and the stepped structures 45A and 46A form an outer edge of the optical lens 51. I will support it. As shown in FIG. 3 , the first and second lens supports 45 and 46 may further include stepped structures 45B and 46B that support the outer edges of the optical lens 51 on short sides.

The upper ends of the first and second lens supports 45 and 46 may be positioned higher than the lower end or outer edge of the entrance surface 53 of the optical lens. Accordingly, the lower edge of the optical lens 51 may be coupled along the inner upper ends of the first and second lens supports 45 and 46. At this time, the lower edge of the optical lens 51 may be attached to the stepped structures 45A and 46A with adhesive. The height G3 of the stepped structures 45A and 46A may be smaller than the height to the top of the first and second lens supports 45 and 46 and greater than the height to the top of the diffusion layer 17. Since the height G4 from the substrate 11 to the stepped structures 45A and 46A is located higher than the top surface of the diffusion layer 17, the incident surface 53 of the optical lens 51 and The diffusion layers 17 can be spaced apart.

The width D3 of the reflective member 40 in the first direction (X) may be larger than the bottom width D2 of the optical lens 51. The height T3 from the bottom of the substrate 11 to the top of the optical lens 51 may be equal to or greater than the width D3 of the reflective member 40 in the first direction. In this case, the optical lens 51 may have a hemispherical exit surface. As another example, the height T3 from the bottom of the substrate 11 to the top of the optical lens 51 may be equal to or smaller than the width D3 of the reflective member 40 in the first direction. In this case, the emission surface 55 of the optical lens 51 may include a Fresnel lens pattern.

The reflective member 40 includes first and second recesses R2 and R3 at the bottom of the bottom, and the upper part of the housing 31 can be accommodated or combined with the second recess R3. A first recess (R2) is included inside the second recess (R3), and the substrate 11 can be inserted or received in the first recess (R2). The first recess (R2) has a depth from the second recess (R3) equal to or greater than the thickness of the substrate 11, so that the lower surface of the substrate 11 is in contact with the first recess (R2). It can have a depth that does not protrude to the outside of. The substrate 11 may be adhered to the housing 31 with an adhesive or may be adhered to the reflective member 40 within the first recess R2.

The width of the first recess (R2) may be smaller than the width of the second recess (R3), and the width of the second recess (R3) is the upper surface width of the housing 31, and the optical lens The housing 31 can be supported at the lower part of the lighting device 100 by being equal to or greater than 80% of the bottom width D2 of (51). As another example, when the housing 31 is a heat dissipation member made of metal or non-metal, heat transferred from the substrate 11 can be effectively dissipated.

The upper ends of the extension parts 32 and 33 on both sides of the housing 31 may be in contact with or combined with the lower ends on both sides of the reflective member 40, and may prevent the reflective member 40 from being pushed or tilted downward. You can.

The reflective member 40 may include a first groove (C1) on one side of the concave portion (C0) and a second groove (C2) on the other side. The first groove C1 is concavely disposed between the first reflector 42 and the first lens supporter 45, and the second groove C2 is formed between the second reflector 43 and the first lens supporter 45. It may be disposed concavely between the second lens supports 46. The width D4 of each of the first and second grooves C1 and C2 is disposed in an area equal to or larger than the width D1 of the light guide portion 15, and the The surface may reflect light reflected through the incident surface 53 of the optical lens 51. The first and second grooves C1 and C2 extend long along the long side of the light guide 15 and may be connected to each other on the short side of the light guide 15 .

For the description of FIGS. 6 to 8, each optical lens will be defined and described as a first to sixth lens. Figure 6 (A) shows the shape of a first lens having a convex entrance surface and a convex exit surface having a first radius of curvature, and (B) shows the shape of a second lens having a convex entrance surface and a convex exit surface having a second radius of curvature. This is the shape of the lens. Figure 7 (A) shows the shape of the third lens having a concave entrance surface and a convex exit surface with a third radius of curvature, and (B) shows the shape of the fourth lens having a flat entrance surface and an exit surface of a Fresnel lens pattern. It is the shape of (A) in Figure 8 is a fifth lens having a flat entrance surface and a convex exit surface, and (B) is the shape of a sixth lens having the same shape as the fifth lens but made of a different material.

The first to fifth lenses are made of PMMA, and the sixth lens is made of PC. The difference between the first and second radii of curvature is less than 20 mm, the first radius of curvature may be 50 mm or more, for example, in the range of 50 mm to 90 mm, and the second radius of curvature may be less than 50 mm, for example, 10 mm to 90 mm. It may be in the 49 mm range. The third radius of curvature has a negative radius of curvature, and may be smaller than the first lens radius by 20 and less than 50 mm in absolute value, for example, in the range of 10 mm to 49 mm.

The luminous intensity of the third lens may be greater than that of the first, second, fourth, fifth, and sixth lenses, and the second lens may be the smallest. It can be seen that the brightness of the sixth lens is lower than that of the first, third, fourth, and fifth lenses. Accordingly, it can be seen that if the optical lens is made of PMMA and has a concave or flat entrance surface and a convex exit surface, the luminance is high.

6 to 8, when the lighting device disclosed above is applied to the front, rear, side, or inside of the moving object, 10U (Up) is 10 based on the intersection point where the horizontal and vertical intersect with respect to the lighting device of the moving object. 5U (Up) is a view from 5 degrees above, HV is a view from the intersection of horizontal and vertical positions, and 10L (Left), 20L, 40L, 60L, 80L are 10 degrees, 20 degrees. This is a view from the left at 40 degrees, 60 degrees, and 80 degrees.

6 to 8, it can be seen that the light distribution image at 10U (Up) shows that the first lens, third lens, fifth lens, and sixth lens have uniform light distribution. The light distribution image at 5U (Up) shows that the light distribution of the first lens, third lens, fourth lens, and fifth lens appears uniform. The light distribution image in HV shows the 4th, 5th, and 6th lenses in uniform distribution, and the 10L (Left), 20L, 40L, 60L, and 80L light distribution images show the 4th and 5th lenses being different lenses. It can be seen that it has a more uniform distribution. Accordingly, it can be seen that the light distribution image and luminance of the first, third, or fifth lens appear higher than those of other lenses. This can provide a uniform distribution of light distribution images by using a lens having a concave or convex entrance surface with a radius of curvature in the width direction of less than 50 and a convex exit surface.

(A) in Figure 9 represents the luminous intensity when the width of the lighting module is 3 mm, (B) represents the luminous intensity when the width of the lighting module is 4 mm, and in the case of 3 mm, the HV point and its surroundings (H5L, H5R ), it can be seen that it is higher than 4 mm. H5L and H5R are the luminance measured horizontally from the center and vertically 5 degrees to the left, and H5R is the luminance measured horizontally from the center and vertically 5 degrees to the right.

(A) in Figure 10 represents the luminous intensity when the height of the lighting module is 6 mm, and (B) represents the luminous intensity when the height of the lighting module is 5 mm. In the case of 5 mm and 6 mm, the luminous intensity is in all areas. It can be seen that it appears above the standard value.

11 (A) represents the luminous intensity when the height of the lighting module is 7 mm, and (B) represents the luminous intensity when the height of the lighting module is 4 mm. Even if there is a difference in module height, each lighting module It can be seen that the luminance in the area appears above the standard value.

Hereinafter, modified examples of FIG. 1 will be described. The configuration of the modified examples is the same as that of the embodiment disclosed above and can be selectively applied, and redundant description will be omitted. This lighting module may have soft characteristics depending on the soft characteristics of the optical lens, and may optionally include the housing shown in FIG. 1.

FIG. 12 is a first modified example of the side cross-sectional view of the lighting device of FIG. 1, FIG. 13 is a partial enlarged view of FIG. 12, and FIG. 14 is a diagram showing a light distribution image according to each direction or position on the optical lens of FIG. 12, FIG. 15 is a diagram showing the luminous intensity of the lighting device of FIG. 12.

12 and 13, the lighting device 100A includes a lighting module 10 and an optical lens 51. The lighting module 10 may include a substrate 11, a light source 13 arranged on the substrate 11, and a light guide 15 covering the light source 13. The lighting module 10 may further include a diffusion layer 17 on the light guide part 15.

The width D1 of the light guide part 15 in the first direction (X) may be equal to the bottom width and the top width. The diffusion layer 17 is disposed on the light guide portion 15 and may be spaced apart from the incident surface 53 of the optical lens 51 at a predetermined distance G1.

The diffusion layer 17 may have an upper width D5 in the first direction (X) smaller than a lower width (eg, D1). By making the top width D5 of the diffusion layer 17 in the first direction (X) narrower than the width, the diffusion layer 17 can provide higher luminous intensity. In addition, by providing the upper width of the diffusion layer 17 to be narrower than the lower width, hot spots in the light emitted through the optical lens 51 can be prevented. That is, when the upper width of the diffusion layer 17 is equal to the lower width, the light emitted from the edge portion of the diffusion layer 17 in the first direction is emitted as a surface light image through the optical lens 51. In this case, A hot spot may occur on one side or along an edge of the surface-illuminated image.

Accordingly, in a modified example of the invention, the upper width of the diffusion layer 17 is provided to be narrower than the width of the light guide portion 15, thereby preventing hot spots caused by light traveling to the edge of the diffusion layer 17.

In the diffusion layer 17, the thickness T51 of the first region 17B having a lower width D1 may be smaller than the thickness T52 of the second region 17C having a width smaller than the lower width D1. there is. The first area 17B is an area adhered to the upper surface of the light guide portion 15, and the second area 17C is an inclined surface, a convex curve, or a vertical surface from the top of the first area 17B. It may include at least one of the stepped surfaces. Preferably, the outer area of the second area 17C may include an inclined surface or a curved surface.

The upper surface 17A of the diffusion layer 17 may be provided as a flat surface or the highest surface between both upper ends of the second region 17C. As another example, the upper surface 17A of the diffusion layer 17 may have a concavo-convex structure. The upper width D5 of the diffusion layer 17 is the width of the area exposed to the upper part R11 of the through hole R1 and may be larger than the width D6 of the upper surface 17A. In addition, since the width D6 of the upper surface 17A of the diffusion layer 17 is provided in the second region 17C smaller than the width (i.e., D5) of the upper surface R11 of the through hole R1, the diffusion layer ( The light traveling to the bottom edge of 17) can be guided in the center direction or the optical axis direction.

The width D1 of the light guide portion 55 may be 7 mm or less, for example, in the range of 3 mm to 7 mm or in the range of 4 mm to 6.5 mm. The width of the lower surface of the diffusion layer 17 may be 7 mm or less, for example, in the range of 3 mm to 7 mm or 4 mm to 6.5 mm. The upper width D5 of the diffusion layer 17 may be 6 mm or less, for example, in the range of 3 mm to 6 mm or 4 mm to 5.5 mm. The top width D6 of the diffusion layer 17 may have a difference of 1 mm or less from the top width D5.

The width D2 of the incident surface 53 of the optical lens 51 in the first direction (X) is 1.5 times or more than the upper width of the lighting module 10 or the upper width D5 of the diffusion layer 17. For example, it may be in the range of 1.5 times to 2.5 times or in the range of 1.7 times to 2.3 times. This can reduce the upper width D5 of the diffusion layer 17, thereby reducing the width D2 of the entrance surface 53 of the optical lens 51. The width D2 of the incident surface 53 of the optical lens 51 in the first direction (X) may be greater than 5 mm.

The lighting device 100A may include at least one or both of a housing (31 in FIG. 1) and a reflective member 40 in order to be coupled to a moving object such as a vehicle. The housing (31 in FIG. 1) may support the lighting module 10 and the reflective member 40.

The reflective member 40 includes a concave portion C0 that is recessed at the top, and the concave portion C0 may include an area lower than the incident surface 53 of the optical lens 51. The concave portion CO may be provided with a central interval G1 between the diffusion layer 17 and the incident surface 53. The gap G1 is a distance spaced apart in the vertical direction, the width of the area having the gap G1 is smaller than the width of the lower surface of the diffusion layer 17 in the first direction (X), and the length is in the second direction (Y ) may be equal to the length of the diffusion layer 17.

The reflection member 40 may have an insertion hole R1 therein, and may include first and second reflection parts 42A and 43A on both sides of the insertion hole R1. The first and second reflection parts 42A and 43A have the insertion hole R1 therein and may protrude toward the incident surface 53 of the optical lens 51. The width of the insertion hole R1 in the first direction (X) may be smaller than the length of the insertion hole (R1) in the second direction (Y). The width of the insertion hole R1 in the first direction may correspond to the width of the light guide part 15 in the first direction, and the length of the insertion hole R1 in the second direction may correspond to the length of the light guide part 15 in the second direction. there is. The insertion hole R1 has a top view shape of a long line in the second direction.

The first and second reflection units 42A and 43A may be disposed on both long sides of the light guide unit 15 . The first and second reflection parts 42A and 43A may extend to both sides of the insertion hole R1. Accordingly, the first and second reflection parts 42A and 43A can reflect light incident on both long sides of the light guide part 15 and re-enter it into the light guide part 15. The first and second reflection parts 42A and 43A may be connected to each other on both short sides of the light guide part 15 in the longitudinal direction.

The upper width (that is, D5) of the insertion hole (R1) in the first direction (X) may be smaller than the lower width (eg, D1). Here, the reflective member 40 may include a first protrusion (P1) and a second protrusion (P2) that protrude inward from the top of the insertion hole (R1). The first protrusion P1 may extend obliquely inward from an upper end of one side of the first region 17B of the diffusion layer 17. The second protrusion P2 may extend obliquely inward from the upper end of the other side of the first region 17B of the diffusion layer 17 .

The second area 17C of the diffusion layer 17 may be exposed as an area between the first and second protrusions P1 and P2. The upper surface 17A of the diffusion layer 17 is the same plane as the upper surface of the first and second protrusions (P1 and P2), or is within a range of 0.5 ± mm based on the upper surfaces of the first and second protrusions (P1 and P2). can be placed. The protrusion length D7 of each of the first and second protrusions P1 and P2 is the distance between the inner surface and a straight line extending the side surface of the light guide portion 15, and may be in the range of 0.5 mm ± 0.1 mm. By reducing the upper width of the diffusion layer 17 using this protrusion length D7, hot spots can be prevented.

The inner surfaces of the first and second protrusions P1 and P2 may include an inclined surface or a concave curved surface. The minimum gap between the first and second protrusions P1 and P2 may be larger than the upper width D6 of the diffusion layer 17 and may be equal to the upper width D5 of the diffusion layer 17. The minimum gap between the first and second protrusions (P1, P2) is a width to expose the upper part of the diffusion layer 17, and the second region 17C is located at the upper part R11 of the insertion hole R1. It may be the width of exposure.

The reflective member 40 has first and second lens supports 45 and 46 on both sides of the concave portion C0, and has a structure in which the first and second grooves C1 and C2 shown in FIG. 1 can be removed. . The entire area of the concave portion C0 of the reflective member 40 faces the incident surface 53 of the optical lens 51 at regular intervals, thereby reducing light loss within the concave portion CO. .

The first lens support 45 may extend or protrude above the first reflector 42A, and the second lens support 46 may extend or protrude above the second reflector 43A. It can be.

The width D2 of the incident surface 53 of the optical lens 51 in the first direction (X) may be greater than the height T2. The length of the incident surface 53 of the optical lens 51 in the second direction (Y) is greater than the width D2, and the lengths of the incident surface 53 and the exit surface 55 in the second direction may be the same. there is. As another example, the length of the entrance surface 53 in the second direction may be greater than the length of the exit surface 55.

As shown in FIG. 14, when the lighting device of FIG. 12 is applied to the front, rear, side, or inside of a moving object, 2U (Up) is 2 degrees upward based on the intersection point where the horizontal and vertical intersect with respect to the lighting device of the moving object. It is a drawing viewed from , 10U(Up) is a drawing viewed from 10 degrees upward, 20U(Up) is a drawing viewed from 20 degrees upward, and H-V is a drawing viewed from the intersection of horizontal and vertical positions. As shown in these figures, the lighting device can be provided as a line image with a constant width, and the line width can be smaller when viewed at 10 or 20 degrees rather than at 2 degrees. As shown in FIG. 15, it can be seen that the difference between the center luminance and the edge luminance in the luminous intensity of the lighting device of FIG. 12 is not large, and the full width at half maximum (FWHM) of the luminous intensity is 40 degrees or more, for example, about 45 ± 2 degrees.

FIG. 16 is a side cross-sectional view showing a second modified example of the lighting device of FIG. 1, FIG. 17 is a view showing a light distribution image according to each direction or position on the optical lens of FIG. 16, and FIG. 18 is a view of the lighting device of FIG. 16. This is a diagram showing luminosity. The second modification example is structurally the same as the first modification example, and is an example in which the width of the incident surface 51 of the optical lens 51 is increased.

Referring to FIG. 16, the lighting device 100A includes a lighting module 10 and an optical lens 51. The lighting module 10 may include a substrate 11, a light source 13 arranged on the substrate 11, and a light guide 15 covering the light source 13. The lighting module 10 may further include a diffusion layer 17 on the light guide part 15.

The width D1 of the light guide part 15 in the first direction (X) may be equal to the bottom width and the top width. The diffusion layer 17 is disposed on the light guide portion 15 and may be spaced apart from the incident surface 53 of the optical lens 51 at a predetermined distance G1.

The width D2 of the incident surface 53 of the optical lens 51 in the first direction It may be a range.

The lighting device 100A may include at least one or both of a housing (31 in FIG. 1) and a reflective member 40 in order to be coupled to a moving object such as a vehicle. The housing (31 in FIG. 1) may support the lighting module 10 and the reflective member 40.

As shown in FIG. 17, when the lighting device of FIG. 16 is applied to the front, rear, side, or inside of a moving object, 2U (Up) is 2 degrees upward based on the intersection point where the horizontal and vertical intersect with respect to the lighting device of the moving object. It is a drawing viewed from , 10U(Up) is a drawing viewed from 10 degrees upward, 20U(Up) is a drawing viewed from 20 degrees upward, and H-V is a drawing viewed from the intersection of horizontal and vertical positions. As shown in these figures, the lighting device can be provided as a line image with a constant width, and the line width can be smaller when viewed at 10 or 20 degrees than at 2 degrees. As shown in FIG. 18, it can be seen that the difference between the center luminance and the edge luminance in the luminous intensity of the lighting device of FIG. 16 is not large, and the full width at half maximum (FWHM) of the luminous intensity is less than 40 degrees, for example, about 34 ± 2 degrees.

FIG. 19 is a side cross-sectional view showing a third modified example of the lighting device of FIG. 1, FIG. 20 is a view showing a light distribution image according to each direction or position on the optical lens of FIG. 19, and FIG. 21 is a view of the lighting device of FIG. 19. This is a diagram showing luminosity. The third modified example is structurally the same as the first modified example, and consists of increasing the width of the entrance surface 51 of the optical lens 51, due to the increase in the width of the entrance surface 51 of the optical lens 51. This is an example in which the shape of the reflection member 40 is modified.

Referring to FIG. 19, the lighting device 100A includes a lighting module 10 and an optical lens 51. The lighting module 10 may include a substrate 11, a light source 13 arranged on the substrate 11, and a light guide 15 covering the light source 13. The lighting module 10 may further include a diffusion layer 17 on the light guide part 15.

The width D1 of the light guide part 15 in the first direction (X) may be equal to the bottom width and the top width. The diffusion layer 17 is disposed on the light guide portion 15 and may be spaced apart from the incident surface 53 of the optical lens 51 at a predetermined distance G1. The width D2 of the incident surface 53 of the optical lens 51 in the first direction It may range from 4.5 times.

The lighting device 100A may include at least one or both of a housing (31 in FIG. 1) and a reflective member 40 in order to be coupled to a moving object such as a vehicle. The housing (31 in FIG. 1) may support the lighting module 10 and the reflective member 40.

As shown in FIG. 20, when the lighting device of FIG. 19 is applied to the front, rear, side, or inside of a moving object, 2U (Up) is 2 degrees upward based on the intersection point where the horizontal and vertical intersect with respect to the lighting device of the moving object. It is a drawing viewed from , 10U(Up) is a drawing viewed from 10 degrees upward, 20U(Up) is a drawing viewed from 20 degrees upward, and H-V is a drawing viewed from the intersection of horizontal and vertical positions. As shown in this figure, the lighting device can be provided as a line image with a constant width, the line width can be smaller when viewed at 10 degrees than at 2 degrees, and the line width can be reduced by less than 50% when viewed at 20 degrees. You can. As shown in FIG. 21, it can be seen that the difference between the center luminance and the edge luminance in the luminous intensity of the lighting device of FIG. 19 is not large, and the full width at half maximum (FWHM) of the luminous intensity is less than 30 degrees, for example, about 27 ± 2 degrees.

(A) in Figure 22 represents the light uniformity when the height of the lighting module disclosed above is 7 mm, and (B) represents the light uniformity when the height of the lighting module is 4 mm, both showing 120000 cd/m2. can be seen.

FIG. 23 is a plan view of a vehicle to which a lighting device according to an embodiment is applied, and FIG. 24 is a view showing an example of a tail light of the vehicle of FIG. 23.

Referring to FIGS. 23 and 24 , the front lamp 2100 in the moving object or vehicle 2000 may include one or more lighting modules, and the operating timing of these lighting modules is individually controlled to function as a typical headlamp as well as , when the driver opens the vehicle door, additional functions such as welcome lights or celebration effects can be provided. The lamp may be applied to daytime running lights, high beams, low beams, fog lights, or turn signal lights.

In the vehicle 2000, the tail lights 2200 and 800 may be arranged as a plurality of lamp units 810, 812, 814 and 816 supported by a housing. For example, the lamp units 810, 812, 814, and 816 include a first lamp unit 810 disposed on the outside, a second lamp unit 814 disposed around the inside of the first lamp unit 810, and the second lamp unit 814. ) may include third and fourth lamp units 814 and 816 respectively disposed inside. The first to fourth lamp units (810, 812, 814, 816) can selectively apply the lighting device disclosed in the embodiment, and a red lens cover or a white lens cover is provided on the outside of the lighting device for the lighting characteristics of the lamp units (810, 812, 814, 816). can be placed. The lighting device disclosed in the embodiment applied to the lamp units 810, 812, 814, and 816 may emit surface light in a uniform distribution.

The first and second lamp units 810 and 812 may be provided in at least one of a curved shape, a straight shape, an angled shape, an inclined shape, or a flat shape, or a mixed structure thereof. The first and second lamp units 810 and 812 may be arranged one or more in each taillight. The first lamp unit 810 may be provided as a tail light, the second lamp unit 812 may be provided as a brake light, and the third lamp unit 814 may be provided as a reverse light. The fourth lamp unit 816 may be provided as a turn signal lamp. These lighting lamps can provide higher light intensity in the rear direction than in the side direction, so they can comply with light distribution regulations such as stop lamps or tail lamps.

As shown in FIG. 24, a plurality of lighting devices 100 and 100A may be arranged as daytime running lights in the front of the vehicle, and may be provided in a line shape each having a convex curved surface.

The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the above description has been made focusing on the examples, this is only an example and does not limit the present invention, and those skilled in the art will understand the above examples without departing from the essential characteristics of the present embodiment. You will be able to see that various modifications and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

10: Lighting module
11: substrate
13: light source
17: diffusion layer
31: housing
40: Reflection member
51: optical lens

Claims (20)

a substrate having a length in a second direction longer than a width in the first direction; a plurality of light sources arranged in a second direction on the substrate; a lighting module having a light guide disposed on the substrate and the light sources;
An optical lens disposed on the lighting module and having an incident surface having a width greater than a width of the lighting module in a first direction, and an exit surface through which light incident on the incident surface is emitted; and
It includes a reflection member having an insertion hole in which the light guide part is disposed, a reflection part extending to both sides of the insertion hole and covering both sides of the light guide part, and a support part supporting a lower edge of the optical lens,
The light guide portion and the insertion hole have a width in the first direction less than a length in the second direction,
A lighting device wherein the top of the reflection portion is located higher than the top of the light guide portion. According to claim 1,
A lighting device wherein the exit surface of the optical lens refracts light incident on the incident surface into parallel light. According to claim 1,
It includes a diffusion layer that diffuses light on the light guide part,
A lighting device wherein the top of the diffusion layer is located higher than the top of the reflection portion. According to clause 3,
The diffusion layer is spaced apart from the incident surface of the light guide,
A lighting device wherein the width of the diffusion layer in the first direction is equal to the width of the light guide in the first direction, and the length of the second direction is equal to the length of the light guide in the second direction. According to any one of claims 1 to 4,
A lighting device wherein the incident surface is one of a concave curved surface, a convex curved surface, or a flat surface in the minor axis direction. According to any one of claims 1 to 4,
A lighting device wherein the emission surface has a hemispherical shape or a Fresnel lens pattern. According to any one of claims 1 to 4,
It includes a housing below the reflective member,
The reflective member includes a first recess in which the substrate is accommodated and a second recess in which the upper part of the housing is accommodated. According to any one of claims 1 to 4,
A lighting device wherein the reflective member has a concave groove between the support portion and the reflective portion. According to any one of claims 1 to 4,
The material of the optical lens is PMMA or PC,
A lighting device in which the light guide seals the light sources and is made of silicon or epoxy material. According to any one of claims 1 to 4,
The width of the light guide portion in the first direction is in the range of 3 mm to 7 mm,
A lighting device wherein the length of the light guide in the second direction is 50 times or more than the width of the light guide in the first direction. Board; a plurality of light sources arranged in one direction on the substrate; a lighting module covering the plurality of light sources and having a light guide portion having a length longer than the width and a diffusion layer disposed on the light guide portion;
an optical lens disposed on the lighting module, having an entrance surface having a width greater than that of the lighting module, and an exit surface through which light incident on the entrance surface is emitted; and
It includes a reflection member having an insertion hole into which the light guide part is inserted, a reflection part extending on both sides of the insertion hole and disposed along the circumference of the light guide part, and a support part supporting a lower edge of the optical lens,
The length of the light guide portion and the insertion hole is at least twice as large as the width,
The reflective portion of the reflective member is disposed along both long sides and both short sides of the light guide portion,
A lighting device wherein the lighting module and the optical lens have flexibility in a thickness direction and a width direction of the lighting module with respect to the longitudinal direction. According to claim 11,
A lighting device wherein the top of the reflection portion is higher than the top of the light guide portion and lower than the top of the diffusion layer. According to claim 11,
A lighting device wherein the reflective member has a concave groove between both outer sides of the inner reflective portion and both inner sides of the outer support portion. The method according to any one of claims 11 to 13,
A lighting device wherein the exit surface of the optical lens refracts light incident on the incident surface into parallel light. a substrate having a length in a second direction longer than a width in the first direction;
a plurality of light sources arranged in a second direction on the substrate;
a light guide disposed on the substrate and covering the plurality of light sources;
a diffusion layer disposed on the light guide part;
an optical lens spaced apart from the diffusion layer and having an incident surface having a width greater than a width of the diffusion layer in a first direction, and an exit surface through which light incident on the incident surface is emitted; and
It includes a reflection member having an insertion hole in which the light guide part and the diffusion layer are disposed, first and second reflection parts extending to both sides of the insertion hole, and a support part supporting both ends of the optical lens,
A lighting device wherein the diffusion layer has an upper width in the first direction smaller than a lower width. According to claim 15,
The diffusion layer includes a first region having a width equal to the width of the light guide portion, and a second region having a width less than the width of the light guide portion on the first region,
A lighting device wherein the outer surface of the second region of the diffusion layer includes a curved or inclined surface. According to claim 16,
A lighting device in which the thickness of the second area is greater than the thickness of the first area. According to claim 16,
The reflective member includes first and second protrusions protruding inward from one side and the other side of the second region,
A lighting device wherein the area between the first and second protrusions exposes the upper surface of the second area. According to claim 16,
A lighting device wherein the width of the incident surface of the optical lens in the first direction is 1.5 to 4.5 times the upper width of the diffusion layer. Comprising a vehicle lamp having a lighting device according to any one of claims 1, 11 or 15,
The lighting device is a vehicle lamp arranged as a line-shaped daytime running light.

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