KR101693221B1 - Led lighting device - Google Patents

Abstract

(I) an illumination unit that includes a plurality of LEDs as a light source to generate light; (ii) a housing having an opening on one surface and a light emitting portion for emitting light to the outside on the other surface, the housing having an inner space; (iii) a reflection part installed on the inner surface of the housing (ii) so as to reflect light generated from the illumination part (i) to the light emitting part; And (iv) a heat releasing part provided to be exposed to the outside on the back surface of the illuminating part i to emit heat to the outside, wherein the front surface of the illuminating part i faces toward the inner space of the housing to cover the opening And the light emitting unit is provided to emit light generated from the illumination unit i or to emit light reflected from the illumination unit i through the reflection unit iii.

Description

LED LIGHTING DEVICE {LED LIGHTING DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED lighting apparatus, and more particularly to an LED lighting apparatus having excellent heat dissipation characteristics and easy light distribution control.

Lighting devices using conventional light source means such as incandescent lamps, fluorescent lamps, and the like have problems such as high power consumption and short life span. In consideration of this point, lighting apparatuses using LEDs with low power consumption and long lifetime as light sources are being developed. When the LED is used as a light source, the life time is remarkably increased as compared with the conventional lighting device. As a result, the amount of wastes is greatly reduced and environmental pollution can be prevented. It is also expected that it will contribute to energy saving by reducing power consumption.

However, LEDs have a problem in that they generate a large amount of heat in spite of these advantages. If the heat generated by the LED can not be emitted to the outside, the lifetime of the LED lighting apparatus is shortened, so that the long life effect due to the use of the LED as a light source is hardly developed.

The LED lighting device also requires a switching mode power supply (SMPS) that converts external AC power to DC power and supplies it to the LED. For example, a registered utility model No. 20-0451090 discloses a LED landscape light with a built-in SMPS and a case in which the LED is mounted and the SMPS is positioned to face the support surface. However, SMPS itself generates heat. Therefore, in the LED landscape light, heat generated in the SMPS and heat generated in the LED interact with each other, thereby reducing the lifetime of the SMPS and the LED.

On the other hand, in a high power LED lighting apparatus (typically 100 watt or more) among the LED lighting apparatus, high power LED chips (for example, 1 watt LED chips) are generally used as a light source. This is because a relatively large number of chips must be used (see FIG. 1) in comparison with the high power LED chips (FIG. 2) in the case of low power LED chips (FIG. For example, to provide high power of 100 watts, 100 watt high-power chips are required, but the number of 0.2 watt low-power chips is 500, and the number of light sources increases, making it difficult to control the light distribution. In particular, when a high power illumination is provided within a predetermined area to replace existing lighting, the higher the number of LED chips, the more difficult it is to control the light distribution. For this reason, high power LED chips are used.

However, high-power LED chips require more heat dissipation because they generate more heat than low-power LED chips. As described above, in order to make the light distribution control easier, the high-power LED chip had to be used despite the deterioration of the heat radiation characteristic.

In the case where the high power lighting device is implemented using the high power LED chip as described above, a large heat dissipation means is required to solve the heat dissipation problem, which increases the volume and weight of the device and increases the manufacturing cost. In particular, a floodlight requires a small size and low power consumption because of its large size and high power consumption.

In order to solve the above-described problems, one embodiment of the present invention can easily emit heat generated from an LED, prevent heat generated from the LED from being conducted to the surroundings, And to provide an LED lighting fixture that can be used as a light source.

It is another object of the present invention to provide an LED lighting apparatus capable of interrupting heat conduction between a power supply unit and a lighting unit.

An LED lighting apparatus according to an embodiment of the present invention includes: (i) an illumination unit having a plurality of LEDs as a light source to generate light; (ii) a housing having an opening on one surface and a light emitting portion for emitting light to the outside on the other surface, the housing having an inner space; (iii) a reflection part installed on the inner surface of the housing (ii) so as to reflect light generated from the illumination part (i) to the light emitting part; And (iv) a heat releasing part provided to be exposed to the outside on the back surface of the illuminating part i to emit heat to the outside, wherein the front surface of the illuminating part i faces toward the inner space of the housing to cover the opening And the light emitting unit is installed to emit light generated from the illumination unit i or to emit light reflected from the illumination unit i through the reflection unit iii.

According to another aspect of the present invention, there is provided an LED lighting apparatus comprising: an illumination unit including a substrate on which a plurality of low-power LED chips are mounted; A first inclined surface forming an acute angle with the bottom surface, and a second inclined surface forming an acute angle with the bottom surface and connected to the first inclined surface, wherein the bottom surface, the first inclined surface, A housing to which both ends of the bottom face, the first slope face, and the second slope face are connected to form an internal space with a boundary between the bottom face, the first slope face, and the second slope face; And at least a part of the illumination unit is arranged to face the inner space of the housing so that a part of the first inclined surface Lt; / RTI >

The LED lighting apparatus according to embodiments of the present invention can be applied to various fields because it has excellent heat radiation characteristics, excellent manufacturing efficiency, high productivity, reduced weight and volume of the final product, smooth light distribution control .

1 shows an arrangement of LED chips of an LED lighting apparatus according to an embodiment of the present invention.
2 shows an arrangement of LED chips of an LED lighting apparatus according to another embodiment of the present invention.
3 is an exploded perspective view of an LED lighting apparatus according to an embodiment of the present invention.
4 is a sectional view showing an assembly state of the LED lighting apparatus of Fig.
5 is a cross-sectional view showing the inclination angle of the reflective surface of the LED lighting fixture of FIG.
6 is a plan perspective view of an LED lighting fixture according to an embodiment of the present invention in which a reflector is provided on a side surface.
7 is an exploded perspective view of a fixed frame applied to an LED lighting apparatus according to an embodiment of the present invention.
8 is a perspective view of an LED lighting apparatus according to another embodiment of the present invention.
9 is a side view of the LED lighting fixture of Fig.
10 is a partially enlarged view of the LED lighting fixture of FIG.
11 is a cross-sectional view of an LED lighting apparatus according to an embodiment of the present invention.
12 shows the light emission of the LED lighting apparatus when the inclination angle a is 0 degree.
13 shows the light emission of the LED lighting fixture when the inclination angle a is 45 degrees.
FIG. 14 shows a light distribution chart and a direct lowering chart of the LED lighting apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, LED lighting devices according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is an exploded perspective view of an LED lighting apparatus according to an embodiment of the present invention, and FIG. 4 is a sectional view showing an assembled state of the LED lighting apparatus of FIG.

The LED lighting apparatus according to an embodiment of the present invention includes (i) an illumination unit 100 that includes a plurality of LEDs as a light source to generate light; (ii) a housing (200) having an opening (220) on one surface and a light emitting portion (210) for emitting light to the outside on the other surface and having an internal space; (iii) a reflection unit 230 installed on the inner surface of the housing 200 so as to reflect light generated from the illumination unit 100 to the light emitting unit 210; And (iv) a heat radiating part 120 which is exposed to the outside of the back surface of the illuminating part 100 and emits heat to the outside. In the LED lighting apparatus, a front surface of the illumination unit 100 is installed toward the inner space of the housing 200 so as to cover the opening 220, and the light emission unit 210 generates light from the illumination unit 100 Or emits light that is reflected from the illumination unit 100 through the reflection unit 230.

1. Lighting unit

3, the illumination unit 100 includes a substrate 110, a plurality of LEDs 111 disposed on the substrate 110, and a plurality of LEDs 111 that support the substrate 110 And a metal plate 130. As the LED light source, an LED chip is preferably used. A chip on board (COB) type LED chip can also be used.

The LED chip is preferably a low power LED chip. As a low-power LED chip, a chip of 0.1 watt to 0.6 watt, preferably 0.2 watt to 0.5 watt may be used. Low-power LED chips provide the same output over the same area, while the spacing between neighboring chips is more narrowly distributed because the number of chips used is higher compared to higher power LED chips with higher power.

FIG. 1 and FIG. 2 respectively show a state in which low power LED chips 111 are arranged on a lighting part of an LED lighting device according to an embodiment of the present invention, specifically, a substrate, and a state in which high power LED chips 111 are arranged . As shown in Figures 1 and 2, an LED lighting fixture using low-power LED chips can be arranged with five 0.2 watt LED chips in a unit area (indicated by "A" in the drawings) (Figure 1) LED lighting fixtures using chips can be aligned with a 1 watt LED chip (Figure 2). In this regard, the spacing between low power chips labeled "d1" in FIG. 1 is narrower than the spacing between high power chips labeled "d2" in FIG. Although not shown, the LED lighting fixture according to a modified embodiment of the present invention may be configured to provide 10 0.1 watt LED chips, 4 0.25 watt LED chips, or 0.5 watt Two LED chips can be aligned.

Since each LED chip 111 serves as a heat transfer point and a heat source for transferring heat, the LED lighting apparatuses using the low-power LED chips according to an embodiment of the present invention can more uniformly heat the heat generated from the LED chips to the substrate (Evenly). Low power LED chips are cheaper and consumes less power than high power LED chips and generate less heat than high power LED chips. Low power LED chips also have higher brightness efficiency than high power LED chips. For example, theoretically there is a lumen difference per watt between the light flux of each of the five 0.2 watt LED chips and the light flux of one 1.0 watt LED chip. That is, a 0.2 watt LED chip has about 160 lm / w while a 1.0 watt LED chip has about 140 lm / w, which means that the light efficiency of low power LED chips is higher than that of high power LED chips.

According to one embodiment of the present invention, a high power LED chip (e.g., LED chips of about 1 watt or more) may be used. When a high power LED chip is used, the heat generated from the chip may have a relatively high temperature as compared with the low power chip, thereby causing a heat island phenomenon. Also, the spacing between neighboring chips within the same area may be farther from the low power LED chips, making thermal conduction difficult. In high power LED chips, these points can shorten the lifetime of the LED chips. Therefore, heat dissipation design is most important in high power LED chips. Therefore, when a high-power LED chip is used, it is desirable to have all of the heat dissipation designs described below as much as possible. Since the heat generation and light distribution characteristics of the chip must be different depending on the type of the chip, the design and the structure of the lighting apparatus must be adjusted to match the same.

In an embodiment of the present invention, the illumination unit 100 can be detachably attached to the housing 200 and can be easily replaced and repaired. The illumination unit 100 is installed toward the inner space of the housing 200 so that the front surface provided with the LED covers the opening 220 of the housing 200. For example, the illumination unit 100 may be inserted into and coupled to the opening 220 of the housing 200.

In an embodiment of the present invention, the metal plate 130 to which the substrate 110 is attached is installed at an acute angle to the ground. Accordingly, the LEDs 110 mounted on the substrate 110 have an inclined structure with respect to the ground. This can be understood to enhance the illuminance of the LED lighting apparatus in the downward direction according to an embodiment of the present invention.

Also, in one embodiment of the present invention, the metal plate 130 may be manufactured by various methods. The metal plate 130 may preferably be an extrudate produced by extrusion molding. In the case where the metal plate 130 is an extruded product and the housing 200 is an injection-molded product, the metal plate 130 has a higher thermal conductivity than the housing 200. Accordingly, heat generated from the LED chip is transmitted to the metal plate 130 Lt; / RTI >

2. Heat-

Referring to FIG. 3, a backside of the illumination unit 100 is provided with a heat emitting unit 120 which is provided to be exposed to the outside and emits heat to the outside. The heat radiating part 120 is preferably a heat radiating fin. In this case, a plurality of heat dissipation fins 120 protrude from the back surface of the metal plate 130, and the substrate 110 may be fixed to the front surface of the metal plate 130 as shown in FIG. The LED chip 111 is mounted on the substrate 110 as a light source. When heat is generated in the LED chip 111, the heat can be rapidly transferred to the heat dissipation fin 120 through the metal plate 130. As described above, when the thermal conductivity of the metal plate 130 is larger than that of the housing 200, heat transfer to the heat radiating fin 120 can be performed more quickly. The heat transmitted to the radiating fins 120 can be easily discharged to the outside through heat exchange with the outside air at the radiating fins 120. The number, shape, and position of the radiating fins 120 may be appropriately selected according to desired design specifications and / or requirements of customers. For example, the radiating fin 120 may be formed horizontally. Also, as shown in FIG. 3, the radiating fin 120 may be formed in a vertical direction or in an inclined direction. When the radiating fins 120 are formed in a vertical direction or at least in a direction inclined with respect to the paper surface, foreign substances such as dust may fall down due to gravity, thereby preventing degradation of heat radiation characteristics due to foreign matter deposition. Particularly, when the radiating fin 120 is formed in a vertical direction, convection of air can be smooth. That is, when the radiating fins 120 are formed in the vertical direction, the heat-exchanged air in the space between the radiating fins 120 can smoothly rise without resistance to form convection. Therefore, it is preferable that the radiating fin 120 is formed in a direction inclined with respect to the paper surface, and more preferably, it is formed in a vertical direction. At least one of the radiating fins 120 may be formed horizontally and / or at least one of them may be formed to be inclined or perpendicular.

In some embodiments, the radiating fins 120 and the metal plate 130 may be formed separately and connected together in a suitable manner. In other embodiments, they may be formed integrally through a process such as extrusion or injection molding. Normally, even if the same material is used, the extruded product has a higher thermal conductivity than the injection molded product. Therefore, the heat dissipation fin 120 and the metal plate 130 are preferably integrally formed, and more preferably, they are formed by extrusion molding. In this case, the thermal conductivity is high and the heat radiation effect is great. The metal plate 130 and the radiating fin 120 are preferably made of a material having a higher thermal conductivity than the housing 110.

3. Housing

According to an embodiment of the present invention, the housing 200 includes a bottom surface, a first inclined surface that forms an acute angle with the bottom surface, and a second inclined surface that forms an acute angle with the bottom surface and is connected to the first inclined surface. The housing 200 is connected to both ends of the bottom surface, the first inclined surface, and the second inclined surface such that an inner space is formed between the bottom surface and the first inclined surface and the second inclined surface. The first inclined surface of the housing 200 is provided with an opening 220 and the bottom surface thereof is provided with a light emitting portion 210. An angle formed by the bottom surface and the first inclined surface, an angle formed by the first inclined surface and the second inclined surface, and an angle formed by the second inclined surface and the bottom surface may be adjusted to satisfy desired design specifications and / Respectively.

In some embodiments of the present invention, the housing 200 may be formed through a process such as extrusion or injection molding. Preferably, the housing 200 is formed entirely by injection molding. Since the housing 200 as the injection molded product has a relatively low thermal conductivity, heat generated in the LED 111 can be conducted to the power supply 300 or conversely, heat from the power supply 300 can be prevented from being conducted to the LED 111 to be.

In another embodiment of the present invention, it is preferable to use a material having a relatively low thermal conductivity as compared with the metal plate 130 and the radiating fin 120 as the housing 200. It is possible to further reduce heat conduction between the illumination unit 100 and the power supply unit 300 through the housing 200. The first inclined surface provided with the opening 220 is formed to be inclined with respect to the ground so that the injection mold can be formed without using an insert.

According to an embodiment of the present invention, a heat insulating sealing part 140 is disposed between the lighting part 100, particularly, the metal plate 130 having the LED chip mounted thereon and the housing 200. The heat-insulating sealing part 140 is preferably made of a material having a low thermal conductivity. The heat insulating sealing part 140 prevents water from flowing into the housing 200 and prevents the heat generated from the LED 111 from being conducted to the housing 200. Also, Thereby preventing conduction of heat to the illumination unit 100.

4. Reflector

According to an embodiment of the present invention, a reflection unit 230 may be installed on the inner surface of the housing 200 to reflect light generated from the illumination unit 100 to the light emitting unit (refer to FIG. 3).

5, the reflection unit 230 may include a plurality of reflection surfaces 231. Each reflection surface 231 may have a predetermined light distribution characteristic when the light is emitted through the light emission unit 210 (? ₁ ,? ₂ ,? ₃ , ...), different curvatures, different areas, or two or more of them. By using the reflecting portion 230 having a plurality of reflecting surfaces 231 having different degrees of inclination as described above, it is possible to efficiently control the light distribution. Particularly, when a low-power LED chip is used as a light source, that is, even when the number of chips is increased and it is more difficult to control the light distribution, desired light distribution can be easily obtained. The number of the low power LED chips 111 and the interval between the neighboring chips can be adjusted so as to realize the predetermined light distribution characteristic and the structure and the shape of the reflection part 230 can be appropriately designed. For example, the LED chips may be mounted on the illumination unit 100 such that at least a part of the light generated from the LED chips 111 can reach the reflection unit 230. According to an embodiment of the present invention, as shown in FIG. 5, the area of the reflective surface may be narrower as the distance from the illumination unit 100 is closer to that of the illumination unit 100,

The reflector 230 may be formed on the ceiling surface of the inner surface of the housing 200 as shown in FIG. 5 and may be formed on both sides of the housing 200 as shown in FIG. 6, . Figure 6 is a plan perspective view of a luminaire according to an embodiment of the invention. As shown in the figure, the light generated from the LED chip 111 on the substrate 110 is reflected to the side and then emitted to the outside through the light emitting portion 210.

In addition, the reflector 230 is detachably attached to the housing 200, so that the reflector 230 can be easily replaced and repaired, and the light distribution characteristics can be freely adjusted.

Various materials such as aluminum can be used as the reflective portion 230. Various coating methods may also be used to form the reflective portion 230. For example, silver (Ag) may be deposited on a PC (Poly Carbonate) and coated or laminated.

5. Light-

According to one embodiment of the present invention, a cover 240 covering the light emitting portion 210 is provided in the light emitting portion 210. The cover 240 prevents foreign substances such as dust from entering the interior of the housing 200. The cover 240 may be secured to the housing 200 by methods known in the art. The LED lighting apparatus according to an embodiment of the present invention includes a fixing frame 250 that fixes the cover 240. The construction and operation of the fixed frame 250 will be described later in more detail.

6. Power supply

According to an embodiment of the present invention, a power supply unit 300 for supplying power to the illumination unit 100 may be mounted on the outer surface of the housing 200. At least one power supply port 201 is provided on the outer surface of the power supply unit 300 so that power can be supplied to the substrate 110. The power supply unit 300 may be detachably mounted or non-detachably mounted. A detachable type is more preferable from the viewpoint of exchange or repair. 4, the power supply unit 300 is installed on the upper portion of the housing 200, so that the entire outer surface of the power supply unit 300 is exposed to the atmosphere. Therefore, the LED lighting apparatus according to an embodiment of the present invention has excellent heat dissipation characteristics Lt; / RTI > Particularly, as shown in FIG. 4, the power supply unit 300 can be installed to be inclined with respect to the ground, thereby reducing stacking of dust and foreign matter and reducing wind resistance.

According to an embodiment of the present invention, the power supply unit 300 is provided with a coupling protrusion 310 protruding downward (FIG. 4). The coupling protrusion 310 may be mounted on the outer surface of the housing 200 so as to contact the upper surface of the housing 200 with a gap between the power supply unit 300 and the outer upper surface of the housing 200. Since the power supply unit 300 and the housing 200 are in contact with each other only through the fastening protrusions, thermal conduction between the power supply unit 300 and the housing 200 can be reduced. In addition, there is a space between the power supply part 300 and the housing 200 except the part connected through the fastening protrusion part, so that the heat radiating effect can be enhanced. In another modified embodiment, a heat dissipation unit 320 is provided on the outer surface of the power supply unit 300 as shown in FIG. 4 so that heat is radiated from the power supply unit 300 itself to the outside. As the heat dissipating unit 320, a heat dissipating fin is preferably used. It is preferable that the radiating fin is formed so as to be inclined with respect to the ground, and it is more preferable that the radiating fin is formed in the vertical direction.

In another modified embodiment, the power supply unit 300 may be provided with an antenna 340 for receiving a radio signal to adjust a power supplied to the substrate 110 from an external radio signal (FIG. 3) And a controller for controlling power supply according to a radio signal received through the antenna 340. [

The positions of the outer surface of the housing 200 on which the light emitting portion 210, the opening portion 220, and the power supply portion 300 are mounted can be determined according to desired design specifications and / or customer requirements. For example, in some embodiments, the light emitting portion 210 may be provided on the bottom surface of the housing 200, and the opening portion 200 may be provided from one end of the bottom surface to the top And the outer surface on which the power supply unit 300 is mounted may be formed to be tilted up from the other end of the bottom surface.

7. Fixed frame

FIG. 3 shows a fixed frame 250 applied to an LED lighting apparatus according to an embodiment of the present invention, and FIG. 7 shows a state in which the fixed frame 250 is disassembled.

As shown in FIG. 7, according to an embodiment of the present invention, the fixed frame 250 has a plurality of divided configurations. That is, in the fixed frame 250, a plurality of bending frames 251 and a linear frame 252 are coupled to each other to form a window frame-shaped fixed frame 250 as a whole.

The bending frame 251 contacts the vertex of the cover 240 and the peripheral edge of the vertex of the cover 240 and the linear frame 252 contacts the edge of the cover 240 between the bending frames 251 (see FIGS. 3 and 7) . Further, the bending frame 251 and the straight frame 252 may be coupled to the bottom light emitting portion 210 of the housing 200 through a coupling mechanism such as a bolt, respectively. Particularly, the bending frame 251 and the straight frame 252 can be partially overlapped with each other, and the overlapped portions can be provided with the step portions 253 which are vertically opposite to each other.

In this structure, the bending frame 251 can be coupled to the housing 200 with the cover 240 interposed therebetween, and the straight frame 252 can be coupled to the housing 200. The step 253 formed at one end of the straight frame 252 can be engaged with the step 253 of the bending frame 251 and the edge of the straight frame 252 can be engaged with the bending frame 251 substantially And can be tightly fixed.

The bending frame 251 and the straight frame 252 are fixed to each other by the contact and fixing between the step portions 253 as described above so that the bolts for fixing both ends of the bending frame 251 and both ends of the straight frame 252 It is possible to omit use, shorten the assembling process time and reduce the manufacturing cost.

In the case of the divided fixed frame 250, the length of the linear frame 252 may be changed according to the size of the lighting device. Therefore, the divided type fixed frame 250 does not need to produce various frames for each model, which is advantageous in that manufacturing cost can be reduced. In addition, although the integral type fixed frame may be distorted during storage when manufactured, the split type fixed frame 250 according to an embodiment of the present invention is of a split type, so that there is no possibility of occurrence of distortion. It can also be stored easily by reducing the volume.

8. Other

FIG. 8 is a perspective view of an LED lighting apparatus according to another embodiment of the present invention, FIG. 9 is a side view of the LED lighting apparatus of FIG. 8, and FIG. 10 is a partially enlarged view of the LED lighting apparatus of FIG.

8 to 10, an LED lighting apparatus according to another embodiment of the present invention includes an angle adjusting unit (not shown) coupled to the illumination unit 100 and capable of tilting and rotating the LED lighting apparatus according to the previous embodiment 400).

According to an embodiment of the present invention, the angle adjusting unit 400 includes a first rotating bracket 410 fixed to one end of a back surface of the illuminating unit 100, a second rotating bracket 410 fixed to the other side of the back surface of the illuminating unit 100, A rotating frame 420 having one end pivotally coupled to the first pivotal bracket 410 and the other end pivotally coupled to the second pivotal bracket 410; And an arm socket part 430 detachably coupled to a part of the light socket and to which an arm of a light stem can be coupled (see FIGS. 8 and 9). The arm socket unit 430 can rotate the coupling structure of the illumination unit 100, the housing 200, and the power supply unit 300 according to the coupling angle.

The angle at which the light emitted from the LED 111 is reflected through the reflecting portion 230 and the angle at which the light emitted from the light emitting portion 210 is emitted can be adjusted by rotating the pivoting frame 420 ). 10, the rotation bracket 410 includes a rotation axis portion 412 fixed to a side surface of the illumination portion 100 through a part of the rotation frame 420 at the center thereof. The pivot bracket 410 is provided with an arc-shaped penetration portion 411 around the rotation axis portion 412. Accordingly, the fixing bolt 421 coupled to the rotation bracket 410 is tightened through the penetration part 411 in a state where the rotation angle of the rotation frame part 420 is appropriately adjusted to prevent the rotation frame part 420 from rotating Can be fixed.

The pivot bracket 410 has a shape of 'C' in a plan view, and the arm socket unit 430 can be coupled to a surface parallel to the illumination unit 100. The arm socket portion 430 may be replaced with a socket or a fastening member having various shapes or shapes as necessary.

The light emitting direction can be adjusted regardless of the installation position by using the angle adjusting part 400 having the above-described configuration through the lighting device according to the embodiment of the present invention (FIG. 8). Accordingly, the LED lighting apparatus according to an embodiment of the present invention can be applied to various fields including a street lamp, a ceiling, a port, a park, and the like. That is, the LED lighting apparatus according to an embodiment of the present invention may be installed on an arm of a streetlight support, or may be installed on a wall, a ceiling, or the like. The LED lighting apparatus according to an embodiment of the present invention can be freely adjusted up and down so as to achieve appropriate light distribution. For example, it can be adjusted from -70 degrees to 110 degrees.

11 is a cross-sectional view of an LED lighting apparatus according to an embodiment of the present invention.

Referring to FIG. 11, the LED lighting apparatus according to an embodiment of the present invention is configured such that the metal plate 130 is inclined with respect to the ground, and the light emitting unit 210 has an angle a . As described above, the inclination angle a takes into consideration the illuminance in the downward direction of the light emitting portion 210, and the range of the inclination angle a can be appropriately adjusted through a predetermined light distribution design specification.

If the inclination angle a is too small, the amount of light directly emitted from the LED 111 chip to the light emitting portion 210 is too small to obtain desired light distribution. For example, as shown in FIG. 12, when the inclination angle a is 0 degree, most of the emitted light is reflected light through the reflecting portion 230, and the direct emitted light from the illuminating portion is only a part, so that it is difficult to obtain appropriate light distribution. On the other hand, if the inclination angle a is too large, the amount of light directly emitted to the light emitting portion 210 is too large to obtain desired light distribution. For example, as shown in FIG. 13, when the inclination angle a is 45 degrees, most of the emitted light is direct light directly emitted to the light emitting portion 210, and the reflected light through the reflecting portion 230 is only a part, . According to an embodiment of the present invention, the inclination angle a is non-limiting and may range from greater than 0 degrees to less than 45 degrees. The limitation of the inclination angle a is that the present invention considers that the use of a low power LED makes it possible to use a larger number of LEDs than the conventional LED and to control the light distribution accordingly.

According to an embodiment of the present invention, when the height (x) and x from the light emitting portion 210 to the peak of the reflecting portion 231 are represented by a straight line, the light emitting portion 210 and the straight line meet The ratio of the length y to the point also affects the light distribution characteristics of the present invention (Fig. 11). For example, as compared with the lighting apparatus of FIG. 12, it can be seen that the lighting apparatus of FIG. 13 has a relatively larger ratio of y / x, and thus, the light distribution characteristic is completely different. The length (y) and height (x) are preferably set to achieve a predetermined light distribution characteristic when light is emitted through the light emitting portion 210. It is particularly desirable that the length y of the reflecting portion 231 is designed to be more than twice the height x and less than 7 times the height x. Within this range of aspect ratio, the light distribution characteristic becomes better.

According to a preferred embodiment of the present invention, the light flux (direct light) directly distributed from the light source and the light flux of the light (reflected light) reflected through the reflector may be adjusted in a range of 4: 6 to 6: 4 .

Fig. 14 shows a light distribution chart and direct chart of a lighting apparatus according to an embodiment of the present invention. The lighting device uses a 0.2 watt low power LED chip, consumes 300 watts, and has a luminous flux ratio of 51.4: 48.6. The light distribution ratios shown in FIG. 14, the direct lowering chart, and the light flux ratios of the direct light and the reflected light can be obtained by adjusting the ratios of the inclination angles a, y / x and the like as described above.

According to another embodiment of the present invention, there is provided an illumination device including a substrate on which a plurality of low-power LED chips are mounted; A first inclined surface forming an acute angle with the bottom surface, and a second inclined surface forming an acute angle with the bottom surface and connected to the first inclined surface, wherein the bottom surface, the first inclined surface, A housing to which both ends of the bottom face, the first slope face, and the second slope face are connected to form an internal space with a boundary between the bottom face, the first slope face, and the second slope face; And at least a part of the illumination unit is arranged to face the inner space of the housing so that a part of the first inclined surface The LED lighting apparatus according to claim 1,

The LED lighting fixtures according to the above-described embodiments of the present invention have various advantages. For example, the illumination portion and the power supply portion can be thermally insulated from each other and can individually emit heat (diverge), thereby preventing thermal conduction between the illumination portion and the power supply portion and preventing shortening of life span. Further, the housing can be made of a material having a relatively low thermal conductivity through injection molding, thereby preventing heat conduction between the illumination part and the power supply part. Further, the heat-insulating sealing portion configured to block the heat conduction is disposed between the illumination portion and the housing, thereby preventing heat conduction between the illumination portion and the housing (and the power supply portion). In addition, since the housing has a deformed frame in which a cover covering the light emitting surface is fixed, deformation and damage of the frame can be prevented, and productivity can be improved.

In addition, the lighting unit and the power supply unit can be manufactured in the form of separate pieces, thereby realizing optimized weight and structure. Particularly, the housing, the lighting unit, and the power supply unit can be manufactured in the form of separate pieces, thereby increasing productivity in mass production and reducing manufacturing costs.

In addition, the LED lighting apparatus according to some embodiments may further include an angle adjusting unit that is pivotally coupled to the illumination unit, and the structure and shape of the arm socket to be assembled together with the rotation bracket of the angle adjusting unit may vary, , The lighting direction can be maintained regardless of the installation position of the lighting apparatus such as the wall. Therefore, LED lighting fixtures can be applied to various lighting fields and can be used for various purposes. Also, LED lighting apparatuses can obtain desired light distribution even when low-power LED chips are used, reduce the heat that can be caused by the use of high-power LED chips, and can reduce weight and volume. Also, the LED lighting apparatus according to some embodiments can control the lighting by wireless, so that operation is very convenient.

The lighting apparatus according to an embodiment of the present invention can be used as a high power illumination of 100 watt or more, and particularly as floodlighting. Floodlight is a lighting device that collects light emitted from a light source and emits a beam to illuminate a distant place. It is mainly used to illuminate distant places such as a vehicle or a ship, or to illuminate an outer wall of a building, an outdoor workshop, or a sports facility. In particular, outdoor floodlighting is so large that resources and power consumption are very large, and therefore the consumption of resources and electric power must be minimized. The lighting apparatus according to an embodiment of the present invention can obtain desired heat radiation characteristics and light distribution characteristics with a relatively small size and can be used more effectively in flood lighting.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims. You can see that you can.

100: illumination unit 110: substrate
111: LED (chip) 120: heat releasing portion, heat radiating fin
130: metal plate 140: heat insulating sealing part
200: housing 210: light emitting portion
220: opening, insertion hole 230:
240: cover 250: fixed frame
251: Bending frame 252: Straight frame
253: step 300: power supply
310: fastening protrusion 320: heat releasing portion,
330: antenna 400:
410: Rotation bracket 411:
412: rotating shaft part 420: rotating frame part
421: fixing bolt 430: arm socket part

Claims (31)

(i) an illumination unit that includes a plurality of LEDs as a light source to generate light;
(ii) a housing having an opening on one surface and a light emitting portion for emitting light to the outside on the other surface, the housing having an inner space;
(iii) a reflection part provided on the inner surface of the housing (ii) so as to reflect light generated from the illumination part (i) to the light emitting part, wherein the closer to the illumination part the narrower the area, The reflective portion having a plurality of reflective surfaces provided so as to have an increased area;
(iv) a heat releasing part provided to be exposed to the outside on the back surface of the illuminating part (i) and emitting heat to the outside; And
(v) a power supply unit mounted on an outer surface of the housing (ii) and detachably attached to the housing, the power supply unit supplying power to the illumination unit (i)
The illuminating unit is disposed so as to cover the opening and the front surface of the illuminating unit i faces the inner space of the housing ii and the back surface of the illuminating unit i is detachably attached to the opening to be exposed to the outside of the housing. Respectively,
The light emitting unit is installed to emit light generated from the illumination unit i or to emit light reflected from the illumination unit i through the reflection unit iii,
Wherein the housing is made of a material having a thermal conductivity lower than that of the power supply unit and the illumination unit.
The method according to claim 1,
The illumination unit (i) includes a substrate, a plurality of LEDs disposed on the substrate, and a metal plate for supporting the substrate. The method according to claim 1,
Wherein the light source is a low power LED of 0.2 to 0.5 watts. The method of claim 3,
The low-power LEDs are arranged to be distributed more narrowly at a narrower interval than the high-power LEDs on the same area basis, in order to provide the same output in the same area as the high-power LEDs having higher power than the low-power LEDs LED lighting fixtures.
The method according to claim 1,
Wherein the light source is a chip on board (COB) type LED. 3. The method of claim 2,
Wherein the metal plate is installed at an angle of more than 0 degrees and less than 45 degrees with respect to a direction perpendicular to the light emitting portion. delete The method according to claim 1,
Wherein each of the reflection surfaces is provided with at least one of different inclination angles and different curvatures so as to realize a predetermined light distribution characteristic when light is emitted through the light emitting portion, LED lighting fixture formed. The method according to claim 1,
The reflector (iii) is installed on both sides of the housing (ii). The method according to claim 1,
The reflector (iii) can be detachably attached to the housing (ii). The method according to claim 1,
Wherein a ratio of a light beam directly emitted from the light source and a light beam reflected through the reflection section (iii) is 4: 6 to 6: 4. The method according to claim 1,
When the height (x), x from the light emitting portion to the peak of the reflecting portion iii is represented by a straight line, the light emitting portion and the reflecting portion iii are in contact with each other from a point where the light emitting portion meets the straight line Wherein the length (y) to the point is set so as to adjust a light distribution, a direct illuminance, and a light flux ratio of the direct light and the reflected light when light is emitted through the light emitting portion. 13. The method of claim 12,
Wherein the ratio of the length (y) / height (x) is more than 2 times to less than 7 times. The method according to claim 1,
And the lighting unit (i) is inserted and coupled to the opening. The method according to claim 1,
A cover for covering the light emitting portion,
And a fixing frame for fixing the cover to the housing (ii). 16. The method of claim 15,
Wherein the fixed frame is divided into a plurality of sections, and each of the divided frames is provided with a step to be engaged with both ends thereof. The method according to claim 1,
The housing (ii) is an injection molded article. The method according to claim 1,
Further comprising an insulating sealing part between the housing (ii) and the illumination part (i). The method according to claim 1,
Wherein the heat emitting portion (iv) includes a plurality of heat dissipating fins. 20. The method of claim 19,
Wherein the radiating fin is formed so as to be inclined with respect to the ground. 3. The method of claim 2,
Wherein the thermal conductivity of the metal plate and the thermal conductivity of the heat emitting portion (iv) are greater than the thermal conductivity of the housing (ii). 3. The method of claim 2,
Wherein the metal plate and the heat releasing portion (iv) are extruded products. delete The method according to claim 1,
The power supply unit v includes a fastening protrusion which is in contact with the upper surface of the housing ii with a gap between the power supply unit v and the outer upper surface of the housing ii. Is mounted on the outer surface of the housing (ii). The method according to claim 1,
And a heat releasing portion on the outside of the power supply portion (v). The method according to claim 1,
Wherein the heat emitting portion is formed so as to be inclined with respect to the ground. An LED lighting fixture further comprising an angle adjuster for tilting and rotating the LED lighting fixture according to any one of claims 1 to 6, 8 to 22, 24 to 26. 28. The method of claim 27,
Wherein the angle-
A first rotation bracket fixed to one end of a back surface of the illumination unit i;
A second rotation bracket fixed to the other side of the rear surface of the illumination unit i;
A rotary frame having one end pivotally coupled to the first pivotal bracket and the other end pivotably coupled to the second pivotal bracket; And
And an arm socket portion detachably coupled to a part of the rotation frame. 29. The method of claim 28,
And the arm socket portion is detachably coupled to a part of the rotation frame portion. The method according to claim 1,
An antenna mounted outside the power supply unit v for receiving a radio signal to adjust power supplied to the illumination unit,
A controller for controlling power supply according to a radio signal received through the antenna,
Wherein the LED lighting apparatus further comprises: (i) an illumination section including a substrate on which a plurality of low-power LED chips are mounted;
(ii) a housing having a bottom surface, a first inclined surface forming an acute angle with the bottom surface, and a second inclined surface forming an acute angle with the bottom surface and connected to the first inclined surface, wherein the bottom surface, A housing to which both ends of the bottom face, the first slope face, and the second slope face are connected to form an internal space around the second slope face;
(iii) a reflector installed on the inner surface of the housing (ii) so as to reflect light generated from the illuminator, the reflector having a plurality of The reflective portion having a reflective surface;
(iv) a heat releasing part provided to be exposed to the outside on the back surface of the illuminating part (i) and emitting heat to the outside; And
(v) a power supply unit mounted on an outer surface of the housing (ii) and detachably attached to the housing, the power supply unit supplying power to the illumination unit (i)
Wherein at least a portion of the illumination portion i is inserted through a portion of the first inclined surface such that the low power LED chips face the interior space of the housing ii, And the housing is made of a material having a thermal conductivity lower than that of the power supply unit and the illumination unit, and the housing is detachably attached to the housing so as to be exposed to the outside.

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