RU2648013C2 - Led lighting fixture - Google Patents

Abstract

FIELD: lighting equipment.

SUBSTANCE: present invention relates to an LED (light-emitting diodes) and more particularly to an LED lighting device, which has an excellent heat radiation characteristic and which is simple to control the distribution of light. Claimed LED lighting device comprises a lighting assembly, provided with a plurality of LEDs as a light generating source; a housing, including an opening, provided on the first surface, a light emitting portion, provided on a second surface, that is opposite to the first surface, for the emission of light outward, and the internal space; a reflective part, provided on the inner surface of the housing, to reflect light generated from the lighting assembly, on the light-emitting part; a heat-radiating unit, provided on the rear surface of the lighting unit so, that to be opened to the outside for radiation of heat outside; a closing member, that covers the light-emitting portion; and a mounting frame, that attaches the closure to the body. Moreover, the lighting unit is installed in such a way, as to close the opening so, that its front surface is directed into the inner space of the housing, and the light emitting portion is set to emit light generated from the lighting unit, or to emit light reflected through the reflective portion from the lighting unit.

EFFECT: technical result is the ability to smoothly control of the distribution of light and simplify the design.

29 cl, 14 dwg

Description

FIELD OF THE INVENTION

The present invention relates to an LED (LED) lighting device, and more particularly, to an LED lighting device that has an excellent heat emission characteristic and which is easy to control the distribution of light.

State of the art

Lighting devices using existing means of light sources, such as an incandescent lamp and a fluorescent lamp, have problems of high power consumption and short life, for example. Considering these problems, lighting devices have been developed that use LEDs (LEDs) as a light source, in which LEDs consume little energy and have a long service life. When the LED is used as a light source, the service life can be significantly increased compared to existing lighting devices. As a result, the amount of waste can also be significantly reduced to prevent environmental pollution. In addition, since power consumption is reduced, it is expected that LED lighting devices can contribute to energy savings.

However, despite the advantages described above, the LED has the problem that it generates a large amount of heat. When the heat generated from the LED is not radiated outward, the life of the LEDs of the lighting devices will be reduced, and thus, the long-term effect of using the LEDs as a light source cannot be achieved as expected.

In addition, LED lighting devices require a switching power supply (SMPS), which converts external AC energy (AC) into direct current (DC) energy, which is supplied to the LEDs. For example, Korean Registered Utility Model No. 20-0451090 discloses an SMPS LED landscape lighting lamp in which the substrate on which the LEDs are mounted and the SMPS are arranged so as to be opposed relative to each other, with a supporting surface disposed between them. However, the SMPS itself generates heat. Accordingly, the LED landscape light has a problem in that the heat generated from the SMPS and the heat generated from the LED interact with each other, thus reducing the life of both the SMPS and the LED.

However, among LED lighting devices, in LED lighting devices with high output power (typically generating 100 watts or more), high-power LED crystals (e.g., 1 Watt LED crystals) were used as light sources. That is why the number of LED crystals required when using low-power LED crystals (FIG. 1) should be relatively larger than the number of LED crystals required when using (see FIG. 1) high-power LED crystals (FIG. 2), and, As a result, it becomes difficult to control the distribution of light. For example, when high-power 1-watt LED crystals are used, one hundred LED crystals are required to provide a high output power of 100 watts. When low-power 0.2 watt LED crystals are used, five hundred LED crystals are required, and due to the increase in the number of light sources, it becomes difficult to control the light distribution. In particular, in the case where high output power lighting is provided in a predetermined area to replace existing lighting, controlling the distribution of light becomes more difficult as the number of LED crystals increases. Thus, high-power LED crystals are used.

However, since high-power LED crystals generate a lot of heat compared to low-power LED crystals, more effort is needed to radiate heat. Despite the deterioration of the heat emission characteristics, there was no choice but to use high-power LED crystals for easier control of the distribution of light.

When a lighting device with a high output power is implemented using high-power LED crystals, as described above, a large heat-emitting means is required, and as a result, problems arise in that the volume and weight of the device are increased and production costs also increase significantly. Especially in the case of a transparent lighting device, due to the fact that the lighting device is large and consumes a lot of energy, a lighting device that is compact and consumes little energy is required.

DETAILED DESCRIPTION OF THE INVENTION

Technical challenge

To solve the problems as described above, one embodiment of the present invention is provided to provide an LED lighting device that is capable of easily radiating heat generated from the LEDs, preventing the heat generated from the LEDs from being transferred to the surrounding elements, and controlling the distribution of light in a desired shape .

In addition, one embodiment of the present invention is provided to provide an LED lighting device that is capable of blocking heat conduction between a power source and a lighting unit.

Technical solution

An LED lighting device in accordance with one embodiment of the present invention includes: a lighting unit provided with a plurality of LEDs as a light source for generating light; a housing including an opening provided on one surface, a light emitting part provided on another surface for emitting light to the outside, and the interior; a reflecting portion provided on an inner surface of the housing for reflecting light generated from the lighting unit to the light emitting portion; and a heat emitting unit provided on a rear surface of the lighting unit so as to be open outward to radiate heat outward. The lighting unit is installed so as to close the hole so that its front surface is directed to the interior of the housing, and the light emitting part is installed so as to emit light generated from the lighting unit, or to emit light reflected through the reflective part from the lighting unit .

An LED lighting device in accordance with another embodiment of the present invention includes: a lighting unit including a substrate on which a plurality of low-power LED crystals are mounted; a casing including a lower surface, a first inclined surface formed at an acute angle with the lower surface, and a second inclined surface connected to the first inclined surface, the opposite ends of the lower surface, the first inclined surface and the second inclined surface being connected to each other in this way so as to form an inner space defined by a lower surface, a first inclined surface and a second inclined surface as boundaries; and a reflective portion on the inner surface of the housing for reflecting light generated from the lighting unit. At least a portion of the lighting unit is inserted through a portion of the first inclined surface such that low-power LED crystals are directed into the interior of the housing.

Useful benefits

LED lighting devices in accordance with the present invention are applicable to various fields, since they have excellent heat emission characteristics and production efficiency, they can be manufactured with high productivity, they can provide the ability to reduce the total weight and volume of the final product, and they allow smooth light distribution control.

Brief Description of the Drawings

Figure 1 shows the arrangement of LED crystals of an LED lighting device in accordance with one embodiment of the present invention;

figure 2 shows the arrangement of LED crystals LED lighting device in accordance with another embodiment of the present invention;

figure 3 is a perspective view showing an LED lighting device in accordance with one embodiment of the present invention in an exploded state;

FIG. 4 is a sectional view showing the LED lighting device of FIG. 3 in an assembled state;

FIG. 5 is a sectional view showing a tilt angle of a reflective surface of an LED of the lighting device of FIG. 3;

6 is a top view showing an LED lighting device in accordance with one embodiment of the present invention, in which reflective parts are provided on the side surfaces;

Fig. 7 is a perspective view showing a mounting frame applied to an LED lighting device in accordance with one embodiment of the present invention in an exploded state;

Fig. 8 is a perspective view of an LED of a lighting device in accordance with another embodiment of the present invention;

Fig.9 is a side view of the LEDs of the lighting device of Fig.8;

figure 10 is a view showing a portion of the LEDs of the lighting device of figure 9 on an enlarged scale;

11 is a sectional view of an LED lighting device in accordance with one embodiment of the present invention;

12 is a view showing LED light emission of a lighting device in the case where the tilt angle “a” is 0 degrees;

13 is a view showing LED light emission of the lighting device when the tilt angle “a” is 45 degrees; and

14 is a light distribution diagram and a direct downward diagram of LED illumination of an illumination device in accordance with one embodiment of the present invention.

An embodiment of the invention

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

FIG. 3 is a perspective view showing an LED lighting device in accordance with one embodiment of the present invention in an exploded state, and FIG. 4 is a sectional view showing an LED lighting device in FIG. 3 in an assembled state.

An LED lighting device in accordance with one embodiment of the present invention includes: a lighting unit 100 provided with a plurality of LEDs as light sources for generating light; a housing 200 including an opening 220 provided on one surface, a light emitting part 210 provided on another surface for emitting light to the outside, and the interior; a reflecting portion 230 provided on an inner surface of the housing 200 for reflecting light generated from the lighting unit 100 to the light emitting portion 210; and a heat-emitting unit 120 provided on the rear surface of the lighting unit 100 so as to be open to the outside to radiate heat to the outside. In the LED lighting device, the lighting unit 100 is mounted so as to cover the opening 220 so that its front surface is directed toward the interior of the housing 200, and the light emitting part 210 is mounted so as to emit light generated from the lighting unit 100, or so that emit light reflected through the reflecting portion 230 from the lighting unit 100.

1. Lighting unit

As shown in FIG. 3, in accordance with one embodiment of the present invention, the lighting unit 100 includes a substrate 110, a plurality of LEDs 111 disposed on the substrate 110, and a metal plate 130 that supports the substrate 110. With regard to LEDs of light sources, preferably LED crystals are used. COB type LED crystals (Chip On Board, surface mount crystals on board) can also be used.

LED crystals are preferably low-power LED crystals. For low-power LED crystals, crystals from 0.1 watts to 0.6 watts, preferably from 0.2 watts to 0.5 watts, can be used. Since the number of crystals when low-power LED crystals are used is larger than the number of crystals when high-power LED crystals with high power are used to provide the same outputs in the same area, low-power LED crystals are distributed so that the intervals between adjacent crystals are smaller.

Figures 1 and 2 show LED lighting units of lighting devices according to embodiments of the present invention, more specifically, the arrangement of low-power LED crystals 111 and the arrangement of high-power LED crystals 111 on a substrate, respectively. As shown in FIGS. 1 and 2, in an LED lighting device using low-power LED crystals, five 0.2-watt LED crystals can be placed per unit area (parts marked “A” in the drawings) (FIG. 1), wherein in an LED lighting device using high-power LED crystals, one 1-watt LED crystal can be placed per unit area (FIG. 2). Thus, the interval between every two adjacent low-power crystals, which is indicated by “d1” in FIG. 1, is less than the interval between each two adjacent low-power crystals, which is indicated by “d2” in FIG. 2. Although not shown, an LED lighting device according to a modified embodiment of the present invention may include ten 0.1-watt LED crystals, four 0.25-watt LED crystals, or two 0.5-watt LED crystals placed within a unit of area in accordance with the desired design requirements and / or customer requirements.

Since each of the LED crystals 111 serves as a heat transfer point that transfers heat and a heat source, LED lighting devices using low-power LED crystals in accordance with one embodiment of the present invention can transfer or radiate heat generated from the LED crystals used, onto the substrate more evenly (uniformly). Low-power LED crystals are cheaper, consume less power and generate less heat than high-power LED crystals. In addition, low-power LED crystals have a higher luminance efficiency than high-power LED crystals. For example, theoretically, there is a difference in luminous flux per watt between the light beam of each of the five 0.2 watt LED crystals and the light beam of one 1.0 watt LED crystal. That is, 0.2 watt LED crystals have about 160 lm / W, while 1.0 watt LED crystals have about 140 lm / W, which means that the optical efficiency of low-power LED crystals is higher than the optical efficiency of high-power LED crystals .

In accordance with one embodiment of the present invention, high-power LED crystals (e.g., LED crystals with a power consumption of about 1 watt) can also be used. When high-power LED crystals are used, the heat generated from the crystals has a relatively high temperature compared to the heat generated from the low-power crystals, which can cause a heat island phenomenon. In addition, since the interval between each two adjacent crystals is larger than the interval in low-power LED crystals on the same area, thermal conductivity may be hindered. As a result, the life of high-power LED crystals can be reduced. Accordingly, the design for heat radiation is much more important in high-power LED crystals. Accordingly, when high-power LED crystals are used, all design factors for heat emission, to be described below, are preferably provided, if possible. Since the amount of heat generated and the light distribution characteristic of the crystals must vary depending on the types of crystals, the configuration and design of the lighting device must be adjusted accordingly.

In one embodiment of the present invention, the lighting unit 100 is detachable from / attached to the housing 200 so that the lighting unit 100 can be easily replaced and repaired. The lighting unit 100 is mounted so as to close the opening 220 of the housing 200 in a state where the front surface on which the LEDs are mounted is directed into the interior of the housing 200. For example, the lighting unit 100 can be installed by inserting in and connecting to the opening 220 of the housing 200.

In one embodiment of the present invention, the metal plate 130 to which the substrate 110 is attached has an inclination angle that is an acute angle with respect to the ground. As a result, the LEDs 110 mounted on the substrate 110 are arranged so as to be tilted relative to the ground. It may be understood that this is intended to increase illumination in the direct downward direction of an LED of a lighting device in accordance with one embodiment of the present invention.

In addition, in one embodiment of the present invention, the metal plate 130 can be manufactured in various ways. The metal plate 130 may be an extruded product that is manufactured by extrusion molding. In the case where the metal plate 130 is an extruded molded product and the housing 200 is an injection molded product, the thermal conductivity of the metal plate 130 is higher than the thermal conductivity of the housing 200, and thus, the heat generated from the LED crystals can conducted quickly through the metal plate 130 rather than through the housing 200.

2. Heat-emitting unit

Referring to FIG. 3, a heat-emitting unit 120 is provided on the rear surface of the lighting unit 100 so as to be open to the outside, thereby radiating heat to the outside. The heat-emitting ribs can preferably be used for the heat-emitting assembly 120. In this case, a plurality of heat-emitting ribs 120 protrudes on the rear surface 130 of the metal plate 130, and the substrate 110 can be fixedly mounted on the front surface of the metal plate 130, as shown in FIG. 4. LED crystals 111 are mounted on the substrate 110 as light sources. When heat is generated from the LED crystals 111, heat can be quickly transferred to the heat-emitting ribs 120 through the metal plate 130. When the heat conductivity of the metal plate 130 is higher than the heat conductivity of the housing 200, as described above, heat transfer to the heat-emitting ribs 120 can be faster. The heat transferred to the heat-emitting fins 120 can be easily radiated through heat exchange with external air from the heat-emitting fins 120. The number, shape and position of the heat-emitting fins 120 can be appropriately selected in accordance with the design requirements and / or customer requirements. For example, heat-emitting ribs 120 may be formed horizontally. In addition, as shown in FIG. 3, heat-emitting ribs 120 may be formed in the vertical direction or in the oblique direction. When the heat-emitting ribs 120 are formed in a vertical direction or in an oblique direction relative to the ground, a foreign material, such as dirt, can fall by gravity, thus a deterioration in the heat emission characteristic caused by the deposition of a foreign material can be prevented. In particular, when heat-emitting ribs 120 are formed in the vertical direction, air convection can be facilitated. That is, when the heat-emitting ribs 120 are formed in the vertical direction, air with heat exchange in the space formed between the heat-emitting ribs 120 can smoothly rise without resistance and form a convection flow. Thus, the heat-emitting ribs 120 are formed, preferably in an oblique direction relative to the ground, more preferably in the vertical direction. At least one of the heat-emitting ribs 120 may be formed in a horizontal direction, and / or at least one of the heat-emitting ribs 120 may be formed in an oblique direction or a vertical direction.

In some embodiments, heat-emitting ribs 120 and a metal plate 130 may be formed separately and mutually connected to each other by an appropriate method. In other embodiments, heat emitting ribs 120 and a metal plate 130 may be integrally formed by a process such as extrusion molding or injection molding. Typically, even with the same material, an extruded molded product has a higher thermal conductivity than the thermal molded product. Thus, the heat-emitting ribs 120 and the metal plate 130 are preferably formed integrally, more preferably by extrusion molding. In this case, the effect of heat radiation is high due to the high thermal conductivity. In addition, the metal plate 130 and the radiating fins 120 are preferably made of a material having a thermal conductivity higher than the thermal conductivity of the housing 200.

3. Case

In accordance with one embodiment of the present invention, the housing 200 includes a lower surface, a first inclined surface forming an acute angle with the lower surface, and a second inclined surface forming an acute angle with the lower surface and connected to the first inclined surface. In the housing 200, the ends of the lower surface, the first inclined surface and the second inclined surface are connected to each other so as to form an inner space defined by the lower surface, the first inclined surface and the second inclined surface as boundaries. A hole 220 is provided through a first inclined surface of the housing 200, and a light emitting portion 210 is provided on the bottom surface. The angle formed by the lower surface and the first inclined surface, the angle formed by the first inclined surface and the second inclined surface, and the angle formed by the second inclined surface and the lower surface are set so as to satisfy the desired design requirements and / or customer requirements.

In some embodiments of the present invention, the housing 200 may be formed by a process such as extrusion molding or injection molding. Preferably, the housing 200 is generally formed by injection molding. This is because the housing 200 in the form of an injection molded product has a relatively low thermal conductivity, so that the heat generated from the LEDs 111 to the power source 300, or vice versa, the heat generated from the power source 300 to the LEDs 111 can decrease .

In another embodiment of the present invention, the material has a relatively low thermal conductivity compared to the metal plate 130, and the heat-emitting fins 120 are preferably used for the housing 200. This is because the heat transfer between the lighting unit 100 and the power source 300 through the housing 200 can go down further. To enable molding without using an insert in the injection mold, a first inclined surface provided with an opening 220 is formed so as to be inclined relative to the ground.

In accordance with one embodiment of the present invention, in the lighting unit 100, in particular between the metal plate 130 on which the LED crystals are mounted, and the housing 200, a heat-insulating sealing unit 140 is placed. The heat-insulating sealing unit 140 is preferably made of a material having a low thermal conductivity. The heat-insulating seal assembly 140 prevents water from seeping into the interior of the housing 200 and, at the same time, blocks the heat from being generated from the LEDs 111 to the housing 200. In addition, the heat-insulating seal assembly 140 blocks the heat from being generated from the power source 300 to the lighting assembly 100.

4. The reflecting part

In accordance with one embodiment of the present invention, a reflective portion 230 may be mounted on the inner surface of the housing 200 to reflect light generated from the lighting unit 100 onto the light emitting portion (see FIG. 3).

As shown in FIG. 5, a reflective portion 230 may be formed of a plurality of reflective surfaces 231, the corresponding reflective surfaces 231 having different angles θ1, θ2, θ3, .., tilt, different curvatures, different areas, or at least two of of these features, in order to embody a predetermined light distribution characteristic when light is emitted through the light emitting part 210. By using a reflective part 230 having a plurality of reflective surfaces 231 with different angles of inclination, the light distribution but can be effectively managed. In particular, even in the case where low-power LED crystals are used as light sources, i.e. in the case where the number of crystals is further increased so that the light distribution is difficult to control, the desired light distribution can be easily obtained. To implement the predetermined light distribution characteristic, as described above, the number of low-power LED crystals 111 and the interval between each two adjacent crystals can be adjusted. Moreover, the design and shape of the reflective portion 230 may be performed in a preferred manner. For example, LED crystals can be mounted on the lighting unit 100 so that at least a portion of the light generated from the LED crystals 111 can reach the reflective portion 230. In accordance with one embodiment of the present invention, as shown in FIG. 5, reflective surfaces can be performed in such a way that a reflective surface closer to the lighting unit 100 has a smaller area, and a reflective surface more distant from the lighting unit has a larger area.

As shown in FIG. 5, a reflective portion 230 may be formed on an upper portion in the housing 200, on opposite side surfaces of the housing 200, or on an upper portion and opposite side surfaces of the housing 200. FIG. 6 is a plan view of a lighting device in accordance with one embodiment of the present invention. As shown, the light generated from the LED crystals 111 on the substrate 110 is laterally reflected and then radiated outward through the light emitting portion 210.

In addition, since the reflecting portion 230 is configured to be attachable to / detachable from the housing 200, replacement and repair are easily performed and, furthermore, the light distribution characteristic can be freely adjusted.

Various materials, such as aluminum, can be used for reflective portion 230. In addition, various coating methods can be used to form reflective portion 230. For example, a method for spraying silver (Ag) onto polycarbonate (PC) that is coated or that can be used it is laminated.

5. The light emitting part

In accordance with one embodiment of the present invention, the cover member 240 is mounted on the light emitting part 210 so as to cover the light emitting part 210. The cover member 240 prevents foreign material, such as dirt, from entering the housing 200. The closure member 240 may be attached to the housing 200 by a method known in the relevant field of technology. An LED lighting device in accordance with one embodiment of the present invention includes a mounting frame 250 that secures the closure member 240. The configuration and operation of the mounting frame 250 will be described in more detail below.

6. Power Supply

According to one embodiment of the present invention, a power source 300 that supplies power to the lighting unit 100 is mounted on the outer surface of the housing 200. At least one power source port 201 is provided on the outer surface of the power source 300 so as to supply power to the substrate 110. The power source 300 may be removably or permanently mounted. In terms of replacement or repair, a detachable type is more preferable. As shown in FIG. 4, since the power source 300 is mounted on the upper portion of the housing 200 so that the entire outer surface of the power source 300 is exposed to the atmosphere, the LED lighting device in accordance with one embodiment of the present invention may have an excellent heat emission characteristic. In particular, the power supply 300 can be mounted so as to be tilted relative to the ground, as shown in FIG. 4, and as a result, the deposition of foreign material, such as dirt, and wind resistance can be reduced.

In accordance with one embodiment of the present invention, the power supply 300 is provided with mounting tabs 310 protruding downward (FIG. 4). The mounting tab 310 may be mounted on the outer surface of the housing 200 so as to be in contact with the upper surface of the housing 200, with a gap provided between the power source 300 and the outer upper surface of the housing 200. Since the power source 300 and the housing 200 are in contact with each other with the other, only through the fixing tabs, the heat conduction between the power source 300 and the housing 200 can be reduced. In addition, there is a space between the power source 300 and the housing 200 with the exception of the portion connected through the mounting tabs, the effect of heat radiation can be improved. In another modified embodiment, as shown in FIG. 4, a heat emitting part 320 is also provided on the outer surface of the power supply 300 so that heat can be radiated from the power supply 300 itself to the outside. As for the heat-emitting part 320, preferably, heat-emitting fins can be used. The heat-emitting ribs are preferably formed so as to be inclined relative to the ground, more preferably in the vertical direction.

In another modified embodiment, the power source 300 may be provided with an antenna 340 that receives a wireless signal, so that the power supplied to the substrate 110 can be controlled wirelessly from the outside (FIG. 3), and may include a controller that controls power supply in accordance with a wireless signal received through the antenna 340.

The positions of the light emitting part 210, the holes 220, and the power source 300 mounted on the outer surface of the housing 200 may be determined depending on the design requirements and / or customer requirements. For example, in some embodiments, as shown in FIGS. 3 and 4, a light emitting portion 210 may be provided on a lower surface of the housing 200, and an opening 220 may be formed so as to be inclined from one end of the lower surface toward the upper side , and the outer surface on which the power supply 300 is mounted may be formed so as to be inclined from the other end of the lower surface toward the upper side.

7. Fixing frame

FIG. 3 shows a mounting frame 250 applied to an LED lighting device in accordance with one embodiment of the present invention, and FIG. 7 shows a mounting frame 250 in a disassembled state.

As shown in FIG. 7, in accordance with one embodiment of the present invention, the mounting frame 250 has a configuration that is divided into a plurality of frames. That is, the mounting frame 250 is formed, in a general sense, with the shape of the window frame by assembling a plurality of bent frames 251 and linear frames 252 with each other.

The bent frames 251 come into contact with the vertices of the closure element 240 and the edges around the vertices, respectively, and the linear frames 252 come into contact with the edges of the closure element 240 between the bent frames 251, respectively (see FIGS. 3 and 7). In addition, each of the bent frames 251 and the linear frames 252 is connected around the lower light emitting part 210 of the housing 200 by means of connecting mechanisms, for example bolts. In particular, the bent frames 251 and the linear frames 252 may be partially overlapped, and the overlapping parts may be provided with stepped portions 253 having complementary shapes to be engaged with each other.

In this design, the bent frames 251 may be assembled with the housing 200, with the closure member 240 being placed between them, and the linear frames 252 may be assembled with the housing 200. Moreover, a stepped portion 253 formed at each end portion of the linear frame 252 may be in contact with the corresponding stepped portion 253 of the bent frame 251 to be engaged with the stepped portion 253, and the edge of the linear frame 252 may be substantially in direct contact with the bent frame 251 to be attached.

Since the bent frames 251 and the linear frames 252 are attached to each other by direct contact and fastening between the stepped sections 253, the use of bolts to fasten the opposite end sections of the bent frames 251 and the opposite end sections of the linear frames 252 can be eliminated. Thus, the time required for the assembly process can be reduced, and production costs can be reduced.

In the case of a split mounting frame 250, as described above, even if a lighting device with a different size is replaced, the mounting frame 250 can simply be used by changing the lengths of the linear frames 252 so that they are suitable for a given size. Thus, with the split mounting frame 250, it is not necessary to produce various frames according to the models, so production costs can be reduced. In addition, although the mounting frame made with a single mold may be deformed during storage, the split mounting frame 250 in accordance with one embodiment of the present invention does not tend to deform, since it is divided. In addition, the split mounting frame 250 can be easily stored by reducing its volume.

8. Other

Fig. 8 is a perspective view of the LEDs of the lighting device in accordance with another embodiment of the present invention; Fig. 9 is a side view of the LEDs of the lighting device of Fig. 8; Fig. 10 is a view showing a portion of the LEDs of the lighting device of Fig. 9 in enlarged scale.

Referring to FIGS. 8 and 10, the LED lighting device in accordance with another embodiment of the present invention further includes an angle adjusting unit 400 connected to the lighting unit 100 so as to tilt and rotate the LED lighting device in accordance with the above embodiments .

According to one embodiment of the present invention, the angle adjusting unit 400 includes a first pivoting bracket 410 attached to one side end of the rear surface of the lighting unit 100, a second pivoting bracket 410 attached to the other side end of the rear surface of the lighting unit 100, pivoting a frame 420 pivotally connected to a first pivoting bracket 410 at one end and pivotally connected to a second pivoting bracket 410 at the other end, and a cantilever socket 430, connected ennoe to the pivotal frame portion 420 so as to be attachable / detachable, and connected to the mast lighting (see. Figures 8 and 9). The cantilever socket 430 provides the ability to rotate the assembled design of the lighting unit 100, the housing 200 and the power source 300 in accordance with the connection angle.

By turning the pivoting frame 420, the angle of reflection of light emitted from the LEDs 111 through the reflection portion 230 and the angle of light emission through the light emitting portion 210 can be adjusted (see FIG. 9). As shown in FIG. 10, the pivoting brackets 410 include a pivot shaft 412 at their centers, the pivoting shaft extending into a portion of the pivoting frame 420 so as to attach to a side surface of the lighting unit 100. Each of the pivoting brackets 410 is provided with an arc shape the circumference of the penetration portion 411 with the rotational shaft 412 as the center. Thus, the pivoting frame 420 can be secured so as not to pivot by tightening the fastening bolt 421 connected to one or each of the pivoting brackets 410 via the penetration portion 411, in a state where the pivoting angle of the pivoting frame 420 is properly adjusted.

The pivoting frame 420 has a “U” shape in a plan view, and the cantilever socket 430 can be attached to the surface of the pivoting frame 420, which is parallel to the lighting unit 100. The cantilever socket 430 can be replaced by sockets or fasteners having different shapes or profiles, if nessesary.

When the angle adjusting unit 400, made as described above, is used with a lighting device in accordance with one embodiment of the present invention, the direction of light emission can be adjusted regardless of the installation position (Fig. 8). As a result, LED lighting devices in accordance with embodiments of the present invention are applicable to various fields, including a street lamp, a ceiling lamp, a port lamp, and a park lamp. That is, LED lighting devices in accordance with embodiments of the present invention can be mounted on a mast of a street lamp, wall or ceiling, for example. The LED lighting device in accordance with one embodiment of the present invention can be freely vertically adjusted to achieve proper light distribution. For example, an LED lighting device can be adjusted from 70 degrees to 110 degrees.

11 is a sectional view of an LED lighting device in accordance with one embodiment of the present invention.

Referring to FIG. 11, in accordance with one embodiment of the present invention, in the LED lighting device, the metal plate 130 is tilted relative to the ground, as described above, and tilted by an angle “a” with respect to the direction perpendicular to the light emitting part 210. As described above , the inclination angle “a” is determined taking into account the illumination in the directly downward direction of the light emitting part 210, and the range of the inclination angle “a” can be appropriately adjusted with respect to design requirements such as The definite distribution of light.

When the tilt angle “a” is too small, the amount of light directly emitted from the LED crystals 111 to the light emitting part 210 is too small to obtain the desired light distribution. For example, when the tilt angle “a” is zero (0) degrees, as shown in FIG. 12, most of the emitted light will be light reflected through the reflecting portion 230, and only a portion of the emitted light will be directly emitted from the lighting unit. Thus, it will be difficult to obtain a suitable light distribution. Moreover, when the tilt angle “a” is too large, the amount of light directly emitted from the light emitting part 210 will be too large to obtain the desired light distribution. For example, when the tilt angle “a” is 45 degrees, as shown in FIG. 13, most of the emitted light will be direct light directly emitted to the light emitting part 210, and the light reflected through the reflecting part 230 will be only a part emitted light, so it is difficult to obtain the required light distribution. In accordance with one embodiment of the present invention, the tilt angle “a” may be, but is not limited to, greater than zero (0) degrees and less than 45 degrees. This limitation of the tilt angle “a” is determined taking into account the fact that due to the use of low power LEDs, the present invention uses more LEDs than the prior art, and thus the need for controlling the light distribution is high.

According to one embodiment of the present invention, when a straight line is indicated vertically from the peak of the reflecting part 230 from the light emitting part 210, the relationship between the height "x" of the peak of the reflecting part 230 from the light emitting part 210 and the length "y" from the point of intersection between the reflecting part 230 and the light emitting part 210 to the point of intersection of the light emitting part 210 and the straight line also affects the light distribution characteristic of the present invention (FIG. 11). For example, it can be seen that the y / x ratio in the lighting device of FIG. 13 is relatively large compared to the ratio in the lighting device of FIG. 12, and thus, the lighting devices become different from each other in terms of light distribution characteristic. The length "y" and the height "x" can preferably be set so as to embody a predetermined light distribution characteristic when the light is emitted through the light emitting part 210. In particular, it is preferable that the reflecting part 230 is configured so that the length " y "exceeds two heights" x "and less than seven heights" x ". A better light distribution characteristic can be obtained in this aspect.

In accordance with one embodiment of the present invention, the ratio in the luminous flux between the light directly distributed from the light sources (direct light) and the light distributed through reflection through the reflecting portion (reflected light) can be adjusted in the range 4: 6-6: four.

14 is a light distribution diagram and a direct downward diagram of illumination of a lighting device in accordance with one embodiment of the present invention. The lighting device used low-power LED crystals with a power of 0.2 watts, the power consumption of the lighting device was 300 watts, and the ratio in the luminous flux between direct light and reflected light was 51.4: 48.6. The light distribution diagram and the directly downward illumination diagram shown in FIG. 14 and the luminous flux relationship between direct light and reflected light can be obtained by properly adjusting, for example, the tilt angle “a” and the y / x ratio, as described above .

Yet another embodiment of the present invention provides an LED lighting device including: a lighting unit including a substrate on which a plurality of low-power LED crystals are mounted; a casing including a lower surface, a first inclined surface formed at an acute angle with the lower surface, and a second inclined surface connected to the first inclined surface, the opposite ends of the lower surface, the first inclined surface and the second inclined surface being connected to each other in this way so as to form an inner space defined by a lower surface, a first inclined surface and a second inclined surface as boundaries; and a reflective portion on the inner surface of the housing for reflecting light generated from the lighting unit. At least a portion of the lighting unit is inserted through a portion of the first inclined surface such that low-power LED crystals are directed into the interior of the housing.

LED lighting devices in accordance with the above-described embodiments of the present invention have various advantages. For example, each of the lighting unit and the power source can be thermally isolated from other structural elements and separately emit (emit) heat in such a way that the thermal conductivity between the lighting unit and the power source and, therefore, a decrease in the service life can be restrained. In addition, since the housing can be made of a material having a relatively low thermal conductivity by injection molding, the thermal conductivity between the lighting unit and the power source can be suppressed. Moreover, since a heat-insulating sealing assembly configured to block thermal conductivity is located between the lighting assembly and the housing, the thermal conductivity between the lighting assembly and the housing (and the power source) may be suppressed. In addition, since the case includes a modified type of frame that secures a cover member that covers the light-emitting surface, deformation and damage to the frame can be prevented, thereby increasing productivity.

In addition, since the lighting unit and the power source can be manufactured as separate parts, optimized weight and design can be implemented. In particular, since the housing, the lighting unit, and the power source can be manufactured in separate parts, productivity can increase during mass production, and therefore production costs can decrease.

[96] Furthermore, LED lighting devices of some embodiments may further include an angle adjusting assembly pivotally coupled to the lighting assembly, in which, since the design or shape of the cantilever socket assembled with the rotary bracket of the angle adjusting assembly is variable , the direction of lighting can be maintained regardless of the installation position of the lighting device, for example, ground, ceiling or wall. Accordingly, LED lighting devices may be applicable to various lighting areas and may be used for various purposes. In addition, even if low power LED crystals are used, LED lighting devices can obtain the desired light distribution, heat generation caused by the use of high power LED crystals can be reduced, and the weight and volume of LED lighting devices can be reduced. In addition, since LED lighting devices can be controlled wirelessly in terms of lighting, it is very convenient to manipulate LED lighting devices.

A lighting device in accordance with one embodiment of the present invention can be used for a floodlight device with high power lighting of 100 watts or more. A floodlight device refers to a lighting device that collects light emitted from a light source in such a way as to illuminate a remote place and is mainly used as a lamp for a vehicle or ship that illuminates a remote place or lamps for the exterior walls of a building outdoor work area or sports facility, for example. In particular, the outdoor floodlight device is large and consumes a very large amount of resources and energy. Thus, it is necessary to reduce the consumption of resources and energy as much as possible. Lighting devices in accordance with embodiments of the present invention can achieve the desired characteristics of heat radiation and light distribution with an appropriate size, and, thus, can be used in a more efficient way in floodlighting.

Although the present invention has been described with reference to embodiments, it will be understood by one of ordinary skill in the art to which the present invention is concerned, that the present invention is not limited to the embodiments, and may be varied or modified in various ways without departing from the scope of the present invention. .

[Reference Positions]

100: lighting unit

110: substrate

111: LED (crystal)

120: heat radiating unit, heat radiating rib

130: metal plate

140: heat insulating sealing assembly

200: housing

210: light emitting part

220: hole, insertion hole

230: reflective part

240: closing element

250: mounting frame

251: bent frame

252: linear frame

253: stepped section

300: power supply

310: mounting foot

320: heat radiating unit, heat radiating rib

330: antenna

400: angle adjusting unit

410: swivel bracket

411: penetration part

412: rotary shaft

420: swing frame

421: mounting bolt

430: console socket

Claims (48)

1. An LED lighting device comprising: a lighting unit provided with a plurality of LEDs as a light source for generation; a housing including an opening provided on the first surface, a light emitting part provided on the second surface, which is opposite relative to the first surface, for emitting light to the outside, and the inner space; a reflecting portion provided on an inner surface of the housing for reflecting light generated from the lighting unit to the light emitting portion; a heat emitting unit provided on a rear surface of the lighting unit so as to be open outward to radiate heat outward; a closing element that covers the light emitting part; and a mounting frame that secures the closure element to the housing, moreover, the lighting unit is installed so as to close the hole so that its front surface is directed to the inner space of the housing, and the light-emitting part is installed so as to emit light generated from the lighting unit, or to emit light reflected through the reflective part from the lighting node. 2. The LED lighting device according to claim 1, wherein the lighting unit includes a substrate, a plurality of LEDs disposed on the substrate, and a metal plate that supports the substrate. 3. The LED lighting device according to claim 1, wherein the plurality of LEDs provided as a light source are low power LEDs of 0.2-0.5 watts. 4. The LED lighting device according to claim 3, wherein the plurality of low-power LEDs are arranged so as to be spaced less than the interval of the plurality of high-power LEDs, which provide an output equal to the output of the low-power LEDs for the same area, with a power greater than the power low power LEDs. 5. The LED lighting device according to claim 1, wherein the plurality of LEDs of the light source are COB type LEDs (Chip On Board, surface mount crystals on a board). 6. The LED lighting device according to claim 2, in which the metal plate is installed at an angle that exceeds zero (0) degrees and less than 45 degrees, relative to the direction perpendicular to the light emitting part. 7. The LED lighting device according to claim 1, in which the lighting unit is detachable from / attached to the housing. 8. The LED lighting device according to claim 1, wherein the reflective portion includes a plurality of reflective surfaces and the reflective surfaces have different angles of inclination, different areas, different curvatures, or at least two of these, respectively, for implementing a predetermined light distribution characteristic when light is emitted through the light emitting part and is formed on the inner upper part of the housing. 9. The LED lighting device according to claim 1, wherein the reflective portion is mounted on each of the opposite side surfaces of the housing. 10. The LED lighting device according to claim 1, in which the reflective portion is detachable from / attached to the housing. 11. The LED lighting device according to claim 1, in which the ratio in the luminous flux between the light directly distributed from the light source and the light distributed by reflection through the reflecting part is 4: 6-6: 4. 12. The LED lighting device according to claim 1, wherein the straight line is indicated vertically from the peak of the reflecting part from the light emitting part, the height "x" to the peak of the reflecting part from the light emitting part and the length "y" from the point of intersection of the light emitting part and the straight line to the point where the reflecting part and the light emitting part are in contact with each other, are set so as to embody a predetermined light distribution characteristic when the light is emitted through the light emitting part. 13. The LED lighting device according to item 12, in which the ratio of the length "y" / height "x" is more than two and less than seven. 14. The LED lighting device according to claim 1, wherein the lighting unit is inserted into and connected to the hole. 15. The LED lighting device according to claim 1, in which the mounting frame is divided into many frames and each of the divided frames has stepped sections at its opposite ends so that one stepped section of one divided frame is engaged with another divided frame to be assembled with one split frame. 16. The LED lighting device according to claim 1, in which the housing is a molded product. 17. The LED lighting device according to claim 1, further comprising a heat-insulating sealing assembly between the housing and the lighting assembly. 18. The LED lighting device according to claim 1, wherein the heat-emitting unit includes a plurality of heat-emitting fins. 19. The LED lighting device according to claim 18, wherein the plurality of heat-emitting ribs are configured to form a tilt with respect to the ground. 20. The LED lighting device according to claim 2, in which the metal plate and the heat-emitting unit have a thermal conductivity higher than the thermal conductivity of the housing. 21. The LED lighting device according to claim 2, in which the metal plate and the heat-emitting unit are molded by extrusion of the product. 22. The LED lighting device according to claim 1, further comprising a power source that is mounted on the outer surface of the housing so as to be detachable / removable, and supplies power to the lighting unit. 23. The LED lighting device according to claim 22, wherein the power source includes a mounting tab that is mounted on the outer surface of the housing so as to be in contact with the outer upper surface of the housing with a gap provided between the power source and the outer upper surface of the housing . 24. The LED lighting device according to claim 22, further comprising a heat emitting assembly outside the power source. 25. LED lighting device according to item 22, in which the heat-emitting node is made so as to be inclined relative to the ground. 26. The LED lighting device according to claim 1, additionally containing a node for adjusting the angle, which allows the tilt and rotation of the LED lighting device. 27. LED lighting device according to p, in which the node for adjusting the angle includes: a first pivot bracket attached to one side end of a rear surface of the lighting unit; a second swivel bracket attached to the other side end of the rear surface of the lighting unit; a pivoting frame pivotally connected to a first pivoting bracket at one end and pivotally connected to a second pivoting bracket at the other end; and cantilever socket attached to a part of the swing frame so as to be removable / removable. 28. LED lighting device according to item 22, further comprising: an antenna mounted outside the power source for receiving a wireless signal for regulating the power supplied to the lighting unit; and a controller that controls the power supply in accordance with the wireless signal received through the antenna. 29. An LED lighting device comprising: a lighting unit including a substrate on which a plurality of low-power LED crystals are mounted; a housing including a lower surface, a first inclined surface formed at an acute angle with the lower surface, and a second inclined surface connected to the first inclined surface, while the opposite ends of the lower surface, the first inclined surface and the second inclined surface are connected to each other so in such a way as to form an inner space defined by a lower surface, a first inclined surface and said second surface as boundaries; a reflecting portion on an inner surface of the housing for reflecting light generated from the lighting unit; a closing element that covers the light emitting part of the housing; and a mounting frame that secures the closure element to the housing, at least part of the lighting unit is inserted through part of the first inclined surface so that low-power LED crystals are directed into the interior of the housing.

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