KR20090025583A - Condensing lighting device - Google Patents

Abstract

A condensing lighting device is provided to improve optical focusing efficiency by arranging a plurality of LED(Light Emitting Diode)s in a cylindrical body. A condensing lighting device(100) includes a main body(110), an optical source, a cone reflecting unit(112), and a condenser lens(140,150). The main body has a hollow cylindrical shape. The optical source is arranged in an inner surface(120) of the main body. The cone reflecting unit is arranged in one side of the main body. The cone reflecting unit reflects the light radiated from the optical source to the other side of the main body. The cone reflecting unit is protruded to the inner part of the main body. The optical source includes a plurality of LED substrates(116) and a plurality of LEDs(118). The plurality of LED substrates are extended to the axial direction of the main body. The plurality of LED substrates are arranged along the circumference direction of the inner surface of the main body. The plurality of the LEDs are mounted on respective LED substrate. The condenser lens controls the progressing path of the light reflected from the cone reflecting unit to the main body.

Description

Condensing lighting device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condensing illumination device that collects light generated from a light source such as a light emitting diode (LED), and more particularly, to an LED condensing illumination device that can be used for vehicle headlights.

Background Art Apparatus for concentrating and illuminating light generated from a light source, for example, LEDs, has been widely used in industrial fields that require headlights and local lighting of vehicles.

In particular, in the case of headlights of vehicles, the appearance of the vehicle is an important point in that it attracts consumers. One recognized area known to enhance the attractiveness of a vehicle includes, but is not limited to, headlights, taillights, turn indicators, reverse lights, vehicle rear mounted stop lights, running lights, fog lights, side markers, and the like. It is the appearance and design of various vehicle lights, sometimes referred to as vehicle ornaments.

Current vehicle lights use several types of light sources suitable for different designs and conditions. For example, vehicle light designs use incandescent lamps, neon tubes, halogen lamps, xenon lamps, and the like. Some vehicle light designs use LEDs that are affordable and can provide a variety of colors in small devices. LEDs are generally non-burnable, have good driving performance, and have high brightness, high efficiency and high vibration resistance. LEDs are therefore an attractive target for vehicle lighting.

LEDs emit monochromatic light at wavelengths that depend on the doping properties of the LED semiconductor material. Typically the most efficient LEDs emit red light, green light, or blue light. The white light may be generated by mixing the red, green, and blue, or may be generated through the LED emitting white light.

In the automotive industry, when the LED is used in the headlights of the vehicle, it is necessary to show high efficiency in terms of high opticality compared to the narrow installation space of the vehicle.

The condensing lighting device according to an embodiment of the present invention is to solve the requirements required for the prior art as described above, and the power factor correction for correcting the power factor of the input voltage while efficiently utilizing a narrow space inside the vehicle. By integrating a DC-DC converter circuit to generate the voltage required to drive the circuit and the LED lamps, a condensing lighting device that can simplify the circuit, reduce the space to occupy, and improve its efficiency in terms of optical to provide.

In order to achieve the above object, the condensing lighting device according to an embodiment of the present invention, the hollow cylindrical body; A light source unit disposed on an inner surface of the main body; It is disposed inside the main body includes a reflector for reflecting the light emitted from the light source unit to the open end of the main body.

Here, the bus bar of the cone of the conical reflector is a straight line.

Optionally, the cone of the cone of the conical reflector may be curved.

The back of the conical reflector has a recess along the busbar of the cone.

In addition, circuits mounted on the rear substrate are further disposed inside the concave portion of the conical reflection portion.

Meanwhile, the light source unit includes a plurality of LED substrates having a shape extending in the axial direction of the main body and a plurality of LEDs mounted on the LED substrate.

The LED substrate is disposed in plural along the circumferential direction of the inner surface of the main body.

Here, the LED is disposed in a portion of the inner surface of the main body corresponding to the conical busbar of the conical reflection portion.

The heat dissipation fin is disposed on an outer surface of the main body.

The heat dissipation fins are disposed extending in the axial direction of the main body from the outer surface of the main body.

The heat dissipation fins are spaced apart from the outer surface of the main body along the circumferential direction of the main body.

The heat radiating fins may have a constant length.

Optionally, the lengths of the radiating fins adjacent to each other may be different from each other.

In addition, the condensing illuminator further includes a condenser lens for controlling the course of the light.

A condensing lighting device of another embodiment according to the present invention includes a hollow cylindrical body; A light source unit disposed on an inner surface of the main body; It is disposed inside the main body includes a reflector for controlling the light emitted from the light source unit in the axial direction of the main body.

According to the condensing lighting device of the present invention, the following effects are expected.

First, the LED may be configured in a cylindrical body to focus brighter light, and additionally focus light by attaching an appropriate optical condenser lens on the front surface.

Second, it has a structure that is easy to dissipate heat generated from the light source.

Third, the entire circuit required for driving can be integrally constructed, which can simplify circuit configuration and efficiently utilize space.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a light collecting apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the condensing lighting device 100 of the present invention includes a hollow cylindrical body 110 having an empty inside, and a light source unit 116 disposed on an inner surface 120 of the main body 110. 118) and other open ends of the main body 110, which are disposed at one end (right rear side in FIG. 1) of both ends of the open end of the main body and irradiated by the light source to be irradiated toward the cylindrical center of the main body 110. It includes a conical reflecting portion 112 protruding inside the main body so as to reflect.

That is, the reflector 112 is disposed inside the main body to control the path of the light irradiated from the light source unit in the axial direction of the cylinder of the main body.

In this case, the light source unit includes a plurality of LED substrates 116 having a strip shape extending in the axial direction of the cylindrical body and a plurality of LEDs 118 disposed on the LED substrate 116. Here, the LED substrate 116 is arranged in plurality in the circumferential direction of the inner surface 120 of the main body, for example, the LED substrate 116 is inside the main body 110 as viewed in the axial direction of the main body. It may be arranged as one side of an octagon or a hexagon. In addition, on the one LED substrate 116, a plurality of LEDs 118 are arranged in succession in the axial direction, that is, the longitudinal direction of the main body 110.

On the other hand, the reflector 112 is conical, it is preferable that the vertices 114 of the conical shape coincide with the virtual axis center of the main body 110.

On the other hand, the rear surface of the conical reflecting portion 112 is provided with a concave portion along the outer shape of the cone of the cone so that the conical reflecting portion becomes hollow cone shape. Accordingly, circuits 132 related to driving and controlling the lighting device may be accommodated in the concave portion of the conical reflection portion. These circuits 132 include a power factor correction circuit for correcting a power factor of an input voltage and a DC-DC converter circuit for generating a voltage of a level required for driving an LED lamp, and these various circuits are integrally configured to The substrate 110 is disposed on the substrate 130 disposed to close one end of the body 110.

Therefore, when the substrate 130 is disposed at one open end of the main body 110, the circuits 132 disposed on the substrate 130 are empty spaces on the rear surface of the reflector 112. It can be inserted into the recess.

On the other hand, the condensing illumination device 100 is a condensing lens 140 for condensing the light by precisely controlling the traveling path after the light generated by the light source is reflected in the central axis direction of the main body 110 from the reflector 112 , 150). The condenser lens 140 is inserted into the main body 110, and the condenser lens 150 is disposed in the forward direction of the light from the condenser lens 140.

The other end of the main body 110 is provided with a cover 160 in which the condenser lens 150 is inserted and mounted. The cover 160 has a hole 162 therein, and the condenser lens 150 is mounted inside the hole 162.

The condenser lens 140 is an assembly of a plurality of convex lenses 142 and 144.

Meanwhile, the heat dissipation fins 122 are attached to the outer surface of the main body 110 in the circumferential direction. For example, the heat dissipation fins 122 have a strip shape extending in the axial direction of the main body from the outer surface of the main body 110.

FIG. 2 is an assembled cross-sectional view of the condensing lighting device shown in FIG. 1.

Referring to FIG. 2, a substrate 130 is disposed at one end (left end in FIG. 2) inside the cylindrical body 110 to close one end of the body 110. On the other hand, the inner side of the main body 110 is disposed at the one end toward the conical reflection portion 112 protruding in the inner direction of the main body is disposed. It is preferable that the vertex 114 of FIG. 1 of the reflecting unit 112 has a cylindrical shape disposed on a central axis of the main body 110.

The rear surface of the reflecting portion 112, that is, the surface opposite to the protruding surface, has a recess 115 along the cone busbar, and a predetermined space is formed on the rear surface of the reflecting portion 112. Accordingly, circuits 132 mounted on the substrate 130 are disposed in the space of the recess 115 formed on the rear surface of the reflector 112.

In general, the circuits protrude from the substrate 130 at a predetermined height, and the circuits 132 are not interfering with the reflector 112 by the space of the recess 115. It can be mounted inside.

As described above, a plurality of LED substrates 116 and a plurality of LEDs 118 mounted on the substrate are disposed on the inner surface of the main body 110. That is, a plurality of LEDs 118 are disposed on one LED substrate 116. The LEDs 118 are arranged side by side in the direction of the central axis of the main body on the LED substrate 116.

The LED 118 is directed toward the inner center of the main body 110. Therefore, the light generated by the LED 118 proceeds once in the direction of the central axis of the main body 110.

As exemplarily shown by the arrows in FIG. 2, the light generated by the LED 118 is reflected by the reflective coating 113 formed on the surface of the reflector 112 having a conical shape, and then opened to the other side of the main body 110. Irradiated to the end. In this type of structure, since the LED 118 is disposed on the inner surface of the cylindrical body 110, the surface of the LED substrate 116 on which the LED 118 is mounted is spread out widely on the inner surface of the main body. .

The reflective coating 113 is formed on the surface of the reflector 112. As an optional embodiment, the reflector 112 may be formed of a material capable of totally reflecting light. . The reflector 112 becomes a conical busbar. In the embodiment shown in FIG. 2, the busbar is straight.

Meanwhile, a plurality of condenser lenses 140 and 150 are disposed in front of the reflector 112 to control the path of the reflected light. The condenser lenses 140 and 150 may include a plurality of convex lenses or concave lenses. The condensing lens 140 shown in FIG. 2 has a flat surface and the convex convex lenses are disposed to face each other. The condensing lens 150 has a concave shape on one surface and a flat surface on the other side. Lens. In order to control the course of the light, an additional condenser lens may be arranged, and the condenser lens may be omitted if necessary.

On the other hand, since the LED 118 is disposed in a large space of the inner surface of the cylindrical body 110, the LED 118 can be easily cooled by the air convection. In addition, the attachment area of the LED can be made twice as large as the area irradiated with light.

For example, when the inner diameter of the main body 110 is r and the axial length of the main body 110 in which the LEDs 118 are disposed in the main body 110 is also r, the total area in which the LEDs 118 are disposed is Calculated by the equation

Area where LED is placed = 2πr (circle length of the body) X r (axial length where LED is placed) = 2 (πr²)

As can be seen from the above equation, when the LED 118 is disposed on the inner surface of the cylindrical body 110 in the condenser lens 100 formed to the dimensions as shown in FIG. It can be seen that the area of the LED is doubled if ignoring the reduction of the light by the reflector and the peripheral circuit than when the is disposed. In this case, that is, it becomes possible to use the space where LED is arrange | positioned more efficiently.

In addition, in the case of the embodiment shown in Figure 2, by attaching the lens to the front side of the open one end of the cylindrical body, when focusing the light is the same distance between the lens and the light source is easy to focus light. This shape can be constructed using convex and concave lenses, and can be focused on two convex lenses when longer paths of light are allowed.

On the other hand, since the LED 118 is in contact with a large area of the main body 110 through the LED substrate 116 and the main body 110 is also easy to be exposed to the atmosphere it is a structure that makes the LED easily in contact with the air. . In addition, a plurality of heat dissipation fins 122 are disposed on the outer surface of the main body 110 to quickly and effectively dissipate heat generated from the LEDs.

When using the condensing lighting device using the LED for the headlight of the vehicle, it is possible to have a configuration that the LED 118 is easily cooled by the circulation of the air flowing while the vehicle proceeds.

In this configuration, rather than the headlights using high-power LEDs can be assembled by configuring a low-power LED, it is possible to easily configure a high-brightness optical apparatus by attaching a number of low-power LEDs.

3 is a simplified view of an embodiment of the heat dissipation fin 122 disposed on the outer surface of the cylindrical body 110 when viewed from one end direction of the condensing illumination device.

Referring to FIG. 3, the heat dissipation fins 122 are spaced apart from each other in the circumferential direction on the outer surface of the main body 110, wherein the heat dissipation fins 122 have the same size.

4 is a diagram illustrating a modified embodiment of FIG. 3.

In FIG. 4, adjacent heat dissipation fins of the heat dissipation fins 122 that are spaced apart from the outside of the main body 110 have different structures from each other. When the entire lighting device including the heat radiation fins 122 is mounted on the headlights of the vehicle, the length of the heat radiation fins 122 may be long enough to be inserted into the rectangular spaces if the space of the position where the lighting apparatus is mounted is a cross section of a rectangle. Will be adjusted. In FIG. 4, the outer contour of the full length of the heat dissipation fin 122 is, for example, rectangular in shape. As described above, the outside of the cylindrical body 110 may be configured in the form of a cooling fin having a heat dissipation fin, and the shape of the heat dissipation fin 122 is not limited to the illustrated shape, in order to achieve a desirable heat dissipation effect, Heat sink fin structure may be considered.

FIG. 5 shows another embodiment of the condensing lighting device shown in FIG. 2. As in the case of FIG. 2, the condensing lighting device 200 has a cylindrical body 210. The substrate 230 is disposed at one end (left end in FIG. 5) inside the cylindrical body 210 to close one end of the main body 210.

On the other hand, the conical reflection portion 212 protruding in the inner direction of the main body toward the one end portion inside the main body 210 is disposed. Here, the conical mother bus is curved in cross section. The vertex of the reflector 212 is preferably disposed on the central axis of the cylindrical body 210.

The rear surface of the reflecting portion 212, that is, the surface opposite to the protruding surface, has a concave portion 215 along the cone busbar, and a predetermined space is formed on the rear surface of the reflecting portion 212. Therefore, circuits 232 mounted on the substrate 230 are disposed in the space of the recess 215 formed on the rear surface of the reflector 212.

The condensing illumination device 200 includes an LED substrate 216 on the inner surface of the main body 210 and a plurality of LEDs 218 disposed on the LED substrate 216, and vertices of the reflecting unit 212. A plurality of condenser lenses 240 and 250 are disposed in the front direction, and a cover 260 is finally disposed at the other opening end of the main body 210.

Here, the cone-shaped bus bar is curved on the cross section of the reflecting unit 212, so that the light generated by the LED 218 is reflected on the surface of the reflecting unit 212 as compared with the case shown in FIG. You can change the path.

In FIG. 5, the reflector 212 has a structure in which the bus bar is curved to protrude toward the center of the cone shape, but is not limited thereto, and the bus bar is curved to protrude from the center of the cone shape to control the path of light. It may be a structure forming a. At this time, the radius of the curve is designed to precisely control the traveling path of the light.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

The present invention can be used in the field of an illumination device for collecting and irradiating light.

1 is an exploded perspective view of a focusing lighting apparatus according to an embodiment of the present invention.

FIG. 2 is an assembled longitudinal cross-sectional view of the light collecting illuminator of FIG. 1.

3 is a cross-sectional view of a temporary example of a heat dissipation fin coupled to a main body of the condensing illumination device of FIG. 1.

4 is a cross-sectional view showing a modified example of FIG.

5 is an assembled longitudinal sectional view of a light collecting apparatus according to another embodiment of the present invention.

<Brief description of symbols for the main parts of the drawings>

100: condensing lighting device 110: main body

112: reflector 114: vertex

116: LED substrate 118: LED

120: inner surface 130: substrate

132: circuits

Claims (15)

A hollow cylindrical body; A light source unit disposed on an inner surface of the main body; And a conical reflector disposed at one end of the main body and protruding into the main body to reflect light emitted from the light source to the other open end of the main body. The method of claim 1, Condensing illumination device, characterized in that the busbar of the cone of the conical reflector is a straight line. The method of claim 1, Condensing illumination device, characterized in that the busbar of the cone of the conical reflector is curved. The method of claim 2 or 3, The back surface of the conical reflector is a condensing illumination device, characterized in that it has a recess along the busbar of the cone. The method of claim 4, wherein Condensing lighting device, characterized in that the circuits mounted on the back substrate is further disposed inside the concave portion of the conical reflector. The method of claim 1, The light source unit includes a plurality of LED substrates of the shape extending in the axial direction of the main body and a plurality of LED mounted on the LED substrate. The method of claim 6, And a plurality of LED substrates arranged along a circumferential direction of the inner surface of the main body. The method of claim 7, wherein And the LED is disposed at a portion of the inner surface of the main body corresponding to the conical busbar of the conical reflector. The method of claim 1, Condensing lighting device, characterized in that the heat radiation fin is disposed on the outer surface of the main body. The method of claim 9, The heat dissipation fins are arranged to extend in the axial direction of the main body from the outer surface of the main body. The method of claim 10, The heat dissipation fins are arranged on the outer surface of the main body spaced apart along the circumferential direction of the main body. The method of claim 11, Condensing lighting device, characterized in that the heat radiation fin is a constant length. The method of claim 11, Condensing lighting device, characterized in that the length of the radiating fins adjacent to each other are different from each other. The method of claim 1, A condensing illuminating device further comprising a condensing lens for controlling the course of light. A hollow cylindrical body; A light source unit disposed on an inner surface of the main body; And a reflecting unit disposed inside the main body to axially control the light emitted from the light source unit.

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