KR101714495B1 - Compact LED flood light using IC module - Google Patents

Abstract

In the case of a small light projecting using an LED array, the present invention comprises: a main body 20 rotatably coupled on a holder 22; LED light source means 30 having a plurality of LED modules 35 on the main body 20 and connecting a plurality of LED chips 31 in series and in parallel on the LED module 35; And control means (40) for controlling the power supply to turn on and off the LED modules (35) of the LED light source means (30) in the set order.
Accordingly, it is possible to realize a compact structure by reducing the depth and lightness, eliminating the converter, and improving the comfort by reducing the glare while satisfying the reference roughness with low power.

Description

(Compact LED flood light using IC module)

More particularly, the present invention relates to a small-sized LED floodlight using an IC module that is installed on a lashing bridge of a cabinet and can satisfy the illumination condition.

Due to the energy saving policies and environmental regulations of each country, LED lamps are replacing traditional LED lamps such as fluorescent lamps, incandescent lamps, and halogen lamps with high efficiency and low power consumption. In the case of ships, there is a tendency to replace voyage lights, searchlights, floodlights, and traffic lights, which are indispensable for voyages as well as indoor and outdoor fluorescent lights, with LED lighting.

For example, a 70W metal halide lamp of a conventional W company is used as a floodlight for a lashing bridge in a container ship. It has a total luminous flux of 2,000 (lm), a light source life of 6,000 hrs, a depth of 200m, a weight of 7.3kg, and a degree of protection IP of 67. On the other hand, when an LED, which is a high-brightness semiconductor light source, is applied, it can be expected to save energy and long life, as well as miniaturization of less than 180 mm in depth.

Korean Patent Registration No. 1475518 (Prior Art 1) and Korean Patent Registration No. 1211188 (Prior Art 2) are known as prior art documents relating to LED illumination.

In the LED lighting module for a light projector including a plurality of LED chips integrated on a PCB substrate, a predetermined output voltage is distributed to a plurality of LED chips integrated on the PCB substrate, A constant voltage IC to induce irradiation; And a plurality of heat dissipation coating portions printed on the upper surface of the PCB substrate to correspond to the LED chips and the number of the constant voltage ICs. As a result, it is expected that the light is irradiated with a uniform luminance to improve the light emitting performance.

In the prior art document 2, a metal PCB with an LED chip, a plate-shaped heat pipe and a pin-type heat sink are directly connected to each other without any heat conductor interposed therebetween. Waterproof frame is not used, so weight is minimized, and it is expected to realize light weight that is essential for marine and marine use.

However, according to the prior art document 1, there is a limitation in securing flexibility by applying the light to the ship, and according to the prior art document 2, the waterproofing and moisture-proofing properties are weakened and it is difficult to install the lashing bridge on the ship.

1. Korean Registered Patent No. 1475518 entitled " LED Lighting Module for Floodlight with Safety Circuit "(Published on October 17, 2014) 2. Korean Registered Patent No. 1211188 entitled " LED Floodlight "(Published on December 12, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the prior art by providing an IC module for realizing a lightweight and miniaturized structure while satisfying illuminance as compared with a flood light for a container lashing bridge using a conventional metal halide lamp And a small LED floodlight used.

In order to achieve the above object, the present invention provides a light emitting diode (LED) array, comprising: a base (22); a case (21) rotatably coupled to the base (22); a plurality A protection net 27 disposed on the front surface of the case 21 to protect the LED light source 30 and an LED module 30 disposed on the bottom of the case 21, A heat sink 32 connected to the LED light source 30, a heat radiating fin 33 partially exposed to the outside of the case 21, A heat pipe 38 disposed between the heat sink 32 and the radiating fin 33 to increase the amount of heat radiation and an LED module 35 of the LED light source unit 30 are turned on and off in the set order Wherein the LED module (35) comprises a plurality of LED chips (31) arranged in an annular shape, And at least one of the plurality of LED chips 31 is disposed closer to the center of the annular shape than the remaining LED chips 31.

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In the detailed configuration of the present invention, the control means maintains the cumulative lighting time for each LED module in the same range through the switching unit and the driving unit.

According to another modification of the present invention, the control means further includes a power factor compensating unit of a valley-fill type between the switching unit and the driving unit.

As described above, according to the present invention, it is possible to reduce the weight, reduce the depth of the projector, reduce the size, and satisfy the reference illuminance with low power, thereby reducing the glare and improving the comfort.

BRIEF DESCRIPTION OF THE DRAWINGS Fig.
Fig. 2 is a diagram showing the LED floodlight according to the present invention in plan view
FIG. 3 is a configuration diagram showing an LED module such as a LED floodlight according to the present invention
4 is a block diagram showing a circuit connection of LED floodlight and the like according to the present invention

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

The present invention proposes a small light projection using an LED array or the like. For example, a plurality of LED-type floodlights are installed at the upper end of a lashing bridge for supporting a container of a container ship. The lighting conditions of the lashing bridge shall be 10 lux for the access way and 50 Lux for the lashing top area. An LED array refers to an LED array applied to an LED floodlight or the like to realize the directivity and light distribution characteristics suitable for the lashing bridge, but it is not necessarily limited to the lashing bridge.

According to the present invention, the main body 20 is rotatably coupled to the cradle 22. The case 21 of the main body 20 is a closed type enclosure having resistance to flammability, weatherability, and wind resistance to conform to the lashing bridge of the container line. The holder 22 is formed as a "C" -shaped structure as shown in Fig. 1 as a portion fixed to the lashing bridge. The case 21 is rotatably coupled to the cradle 22 via a hinge 23. Accordingly, it is easy to change the light distribution characteristic of the LED floodlight according to the container shipping situation on the lashing bridge.

On the other hand, a waterproof type wiring box 25 for connecting to the outside is provided on the bottom surface of the case 21, and a protection net 27 for protecting the LED light from the external impact is provided on the front surface of the case 21. The terminal box 25 is provided with a terminal block for connection of internal and external circuits.

According to the present invention, the LED light source means 30 includes a plurality of LED modules 35 on the main body 20, and a plurality of LED chips 31 are connected in series and in parallel on the LED module 35 It has one structure. The LED module 35 basically applies a COB (Chip On Board) method, which is a semiconductor device. In the case of the COB, a large number of LED chips 31 are densely packed and driven by a single power source, but the light source is narrowly distributed, which is highly glare. 3, the LED chip 31 of the LED module 35 is preferably annularly distributed. However, all of the LED chips 31 are connected in a series-parallel circuit without being connected in series. Fig. 1 illustrates a state in which eight LED modules 35 are installed in two rows in the vertical direction on one case 21. Fig.

At this time, it is preferable that each LED module 35 is connected to the case 21 by a connector method or by using a terminal block of the above-mentioned wiring box 25 for convenience of maintenance.

The LED light source means 30 includes a heat sink 32 coupled to the LED module 35 and a radiating fin 33 partially exposed to the outside of the main body 20 . The heat sink 32 may be coupled to replace at least a portion of the substrate forming the LED module 35. The heat radiating fins 33 are disposed adjacent to the heat sink 32 and partially exposed to the outside such as the upper surface, side surface, and rear surface of the case 21. [ In the case of the LED floodlight or the like installed on the lashing bridge of the ship, cooling by the heat sink 32 and the radiating fin 33 is easy even without forced cooling, but the fan is not excluded.

As a modification of the present invention, a heat pipe 38 is further provided between the heat sink 32 and the radiating fin 33 to increase the amount of heat radiation. The heat pipe 38 is filled with a working fluid such as alcohol in the inside of the pipe, and is coupled to the heat sink 32 and the heat radiating fin 33, respectively. The working fluid comes into contact with the radiating fins (33), condenses into liquid phase, generates heat, and contacts with the heat sink (32) to absorb heat while evaporating in a vapor phase. Therefore, the heat generated by the LED module 35 can be efficiently discharged without a blower fan, thereby maintaining performance and service life.

According to the present invention, the control means (40) has a structure for controlling the power supply to turn on and off the LED modules (35) of the LED light source means (30) in the set order. The control means 40 is basically based on correct voltage and current control to ensure light output and lifetime for the COB LED module 35. In order to exclude the converter from the control means 40, it is preferable to apply an IC module which operates by an AC power source, which will be described later. 4 illustrates a state in which the AC power source unit 41, the rectifying unit, the switching unit 45, and the driving unit 48 are formed in the control means 40. [ The surge protection unit 42 is connected to the AC power supply unit 41 to enhance the power stability against disturbance. The rectification part is configured as needed, and the bridge circuit can be used without excluding the converter. The switching unit 45 includes a known IC module (switching regulator) for interrupting the power supply for turning on and off the LED modules 35. [ As an example, Seoul Semiconductor's model name "ACRICH2" enables 220Vac driving and 8.5W power consumption.

The control means 40 maintains the cumulative lighting time for each of the LED modules 35 in the same range through the switching unit 45 and the driving unit 48. [ 1, when eight LED modules 35 are installed in the LED floodlight and the like, the switching unit 45 repeats turning on and off two, four, six, and eight lights according to the sinusoidal waveform of the AC power source unit 41 . In other words, all eight are turned on in the maximum voltage region and lighted in a constant "fixed pattern" The difference in the cumulative lighting time between the LED modules 35 is large, resulting in shortening of the life span. In order to reduce the cumulative lighting time deviations, an order is alternately determined in partial lighting (2, 4, 6, etc.) and driven in a "variation pattern". For example, the first and second LED modules 35, the second & third LED module 35, the third & 4 LED module 35, and the like are alternated in the area where the two LED modules 35 are lit.

In order to implement such logic, a separate IC module may be further included in the switching unit 45 and the driving unit 48.

The control unit 40 may further include a power factor compensator 46 of a valley-fill type between the switching unit 45 and the driving unit 48 do. A valley-fill type power factor compensator 46 is composed of a current conversion diode and a capacitor, and compensates the power factor of the pulse current of the switching circuit. For example, when the power factor is kept at 0.9 or more, the power consumption is reduced and the external shape of the LED floodlight is reduced.

 Of course, the selection of the circuitry of the switching unit 45 and the driving unit 48 in the control means 40 can be changed in a manner conforming to the use of the lighting product.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

20: main body 21: case
22: Cradle 23: Hinge
25: Wiring box 27: Protective net
30: LED light source means 31: LED chip
32: heat sink 33: heat sink pin
35: LED module 38: heat pipe
40: Control means 41: AC power source
42: surge protection unit 45: switching unit
46: Power Factor Compensation Unit 48:

Claims (5)

For small light projections using LED arrays:
A holder 22;
A case 21 rotatably coupled to the cradle 22;
LED light source means (30) comprising a plurality of LED modules (35) arranged in the case (21);
A protection net (27) disposed on a front surface of the case (21) and protecting the LED light source means (30);
A waterproof type connection box 25 disposed on the bottom surface of the case 21 for connection to the outside;
A heat sink (32) coupled to the LED light source means (30);
A radiating fin (33) partially exposed to the outside of the case (21);
A heat pipe (38) disposed between the heat sink (32) and the radiating fin (33) to increase the amount of heat radiation; And
And control means (40) for controlling the power supply to turn on and off the LED modules (35) of the LED light source means (30) in the set order,
The LED module 35 includes a plurality of LED chips 31 arranged in an annular shape,
At least one of the LED chips 31 is a small LED floodlight using an IC module disposed closer to the center of the annular shape than the remaining LED chips 31. delete delete The method according to claim 1,
Wherein the control means (40) maintains the cumulative lighting time for each LED module (35) in the same range through the switching unit (45) and the driving unit (48). The method according to claim 1,
The control unit 40 further includes a power factor compensator 46 of a valley-fill type between the switching unit 45 and the driving unit 48. .

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