KR101839728B1 - LED Lighting Device with Up-Lighting Module and Bottom-Lighting Module - Google Patents

Abstract

The present invention relates to an upward-downward LED lighting device comprising an integrated body of an upward LED module and a downward LED module to emit the lights of LEDs to the top and bottom and simultaneously control the illuminances of the upward and downward LED modules more precisely to a ratio desired by a user. According to the present invention, the upward LED module is attached to the outer circumference at the top of a main housing while the downward LED module is positioned inside the main housing. Thereby, without using additional parts such as connection poles, the integrated upward-downward LED lighting device can be provided. Also, in the lighting device of the present invention, the upward LED module is positioned along the outer circumference of the main housing, thereby sharing a heat sink panel protruding towards the top of the main housing with the downward LED module. In addition, the upward-downward LED lighting device of the present invention is capable of distributing voltages to the downward and upward LED modules precisely according to the brightness desired by a user, using an I2C interface part and multiple resistance connection terminals. Moreover, the upward-downward LED lighting device is capable of swiftly breaking an electric current flowing into the downward and upward LED modules, in case of an overcurrent or a short circuit, using an FET circuit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a lighting device having an up-down LED module,

The present invention relates to a luminaire having an up-down LED module, more specifically, an up-direction LED module and a down-side LED module are integrally formed to simultaneously irradiate LEDs to upper and lower portions, Down LED luminaire capable of dimming more precisely at a desired rate.

In general, LED lamps have very low power consumption compared to conventional bulbs such as fluorescent lamps, incandescent lamps, etc., and have a long life span and small size and volume. Therefore, It is widely used.

LED lighting is widely used not only as a special field such as a traffic signal but also as a lighting fixture having a decoration function for directing various colors of lighting to illuminate the interior of a room luxuriously and luxuriously.

Currently used LEDs are structured such that light is irradiated only downward. When such a downward LED is installed in a ceiling of a room with a very high height such as a hotel, a department store, a museum, a shopping mall, etc., the distance from the ceiling to the floor must be long to increase the power consumption and brightness of the lighting. There is a problem that the ceiling side becomes visually darker because it is not irradiated.

Korean Utility Model Registration No. 20-0468543 of FIG. 1 discloses an LED illumination lamp that can illuminate lights of different colors toward the upper and lower sides, respectively. The registration utility model has a structure in which the downward main board 30 and the upward auxiliary board 40 are spaced apart from each other by a predetermined distance and are coupled through the connecting rod 20, the fastening ring 21 and the fastening hole 22. That is, since the downward LED and the upward LED module are coupled to each other through the connecting rod, the connecting rod 20, the fastening ring 21, and the fastening hole 22 increase in volume, LEDs are installed on each substrate of the lamp, and the main substrate 30 and the auxiliary substrate 40 are spaced apart from each other for heat dissipation.

In addition, in the utility model lighting apparatus, the main board 30 and the auxiliary board 40 are physically separated, and it is difficult to dim the illuminance of the downward LED and the upward LED with a single input power by a user's desired ratio.

The present invention provides an up-down LED lamp which can simplify a luminaire and reduce its volume by integrally forming an upward LED module and a downward LED module without connecting parts.

The present invention provides an up-down LED luminaire capable of simultaneously dissipating the upward LED and the downward LED.

The present invention provides an up-down LED luminaire capable of finely dimming the illuminance of the downward LED and the upward LED at a desired ratio by one input power source.

The present invention provides an up-down LED luminaire capable of rapidly blocking the current flow to the downward LED module and the upward LED module when an overcurrent flows to the output voltage or a short circuit occurs.

In one aspect,

A main housing 10 having a heat radiating portion at an upper portion thereof;

A downward LED module (20) having a plurality of LEDs and attached to a lower portion of the main housing to emit light downward;

An upward LED module (30) provided with a plurality of LEDs and attached to the upper part of the main housing along an outer circumference to irradiate light upward; And

And a converter (40) fixed to the upper side of the main housing and the heat dissipating unit, wherein the luminaire distributes the output voltage of the converter to the lower LED module and the upper LED module, Down LED luminaire that is driven simultaneously.

In the present invention, the upward LED module is attached along the outer periphery of the upper portion of the main housing, and the downward LED module is positioned inside the main housing inward to provide an upward-downward LED lamp, which is integrally formed without using a component such as a connecting rod can do.

In addition, the upward-downward LED lamp of the present invention may share a heat sink formed by protruding upward from the main housing as the upward LED module is positioned along the outer periphery of the upper portion of the main housing, by the upward LED module and the downward LED module.

In addition, the up-down LED lighting device of the present invention can distribute the voltage to the downward LED and the upward LED with high precision with the brightness desired by the user by using the I2C interface and the plurality of resistor connection terminals.

In addition, the up-down LED lamp of the present invention can quickly cut off the current flow to the downward LED module and the upward LED module when an overcurrent flows to the output voltage or a short circuit occurs by using the output short-cutoff module.

Figure 1 is an example of a conventional phase-down luminaire.
Fig. 2 is a schematic view of an upper-down LED lighting device of the present invention viewed from above. Fig.
FIG. 3 is a schematic view of the upper-lower LED lighting fixture of the present invention viewed from below.
4 is an exploded view of Fig.
Figure 5 is a block diagram of a circuit system of the present invention.
6 is a block diagram embodying the dimming module.
7 is a block diagram embodying a short prevention module.
8 and 9 are circuit diagrams of the present invention.
Fig. 10 illustrates the dimming circuit in Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the description or drawings of the embodiments below. That is, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprising "or" having ", as used herein, are intended to specify the presence of stated features, integers, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, parts, or combinations thereof.

Also, the terms "part," "module," and the like, which are described in the specification, refer to a unit for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

FIG. 2 is a schematic view of the upper-down LED lighting device of the present invention viewed from above, FIG. 3 is a bottom view, and FIG. 4 is an exploded view of FIG.

2 to 4, the upper-down LED lamp of the present invention includes a main housing 10, a downward LED module 20, an upward LED module 30, and an ADC converter 40.

The main housing 10 has a heat radiating portion 11 at an upper portion thereof, the downward LED module is coupled to a lower portion thereof, and the upward LED module is coupled from an upper portion thereof.

The heat dissipating unit 11 may include a plurality of semicircular radiation plates 111 protruding from the upper portion of the main housing 10.

Preferably, the heat dissipating unit 11 is located on the upper portion of the main housing 10, but is located in an inner region except the outer peripheral side.

The downward LED module 20 includes a plurality of LEDs 1 and is attached to a lower portion of the main housing to irradiate light downward.

The downward LED module 20 includes a lower LED lens unit 21 to which a plurality of LEDs are fixed, a lower PCB substrate 22 to which the lower LED is bonded, and a lower housing 23 to cover and protect the downward LED module .

The lower LED lens unit 21 is bonded to the lower PCB substrate 22. [ The downward LED module 20 is coupled to the main housing 10 through fastening bolts 24.

The upward LED module 30 includes an upper PCB substrate 31 and an upper housing 32.

The upper PCB substrate 31 has a rim with a through hole. Referring to FIG. 3, the upper PCB substrate 31 may be ring-shaped. A plurality of upward LEDs 1 may be bonded to the upper PCB substrate.

That is, the upper PCB substrate 31 may include a rim and an LED.

It is preferable that the rim of the upper PCB substrate 31 is formed to have a larger diameter or a larger radius than the outer surface (outer periphery) of the lower LED lens unit 21. [

When the rim of the upper PCB board 31 is installed in the main housing, the upper LED board can be located further outwards than the downward LED module, so that the upward LED can be prevented from being positioned directly above the downward LED.

An upper PCB board 31 is formed on an upper outer side edge region of the main housing 10 and a heat radiating portion 11 may be located on an inner side region of the main housing 10 except an outer surface.

Since the upward LED module is easily in contact with the heat sink located on the adjacent side and the lower PCB substrate 22 is brought into contact with the heat sink, the lamp of the present invention can share the heat sink with the downward LED module and the upward LED module.

The converter (40) is fixed to the upper side of the main housing to provide a DC voltage to the LED lamp. The converter (40) can use a known rectifying device without limitation.

The up-down LED lamp of the present invention can distribute the output voltage of the converter to the downward LED module and the upward LED module to simultaneously drive the downward LED and the upward LED.

FIG. 5 is a block diagram of a circuit system of the present invention, FIG. 6 is a block diagram embodying a dimming module, FIG. 7 is a block diagram embodying a short prevention module, FIGS. 8 and 9 are circuit diagrams of the present invention, The circuit diagram of the dimming module (Fig. 8) and the short-circuit prevention module (Fig. 9) is indicated by a dotted line in the system, and Fig. 10 embodies the dimming circuit in Fig.

5 to 10, the upper-down LED lighting device of the present invention includes a dimming module 50, a DC converter 60, a short-circuit prevention module 70, and a circuit including a sensing part (sensing IC) System.

The dimming module 50 may adjust the illuminance of the downward LED module and the upward LED module to a desired ratio.

The DC converter 60 provides a voltage to the downward LED module and the upward LED module according to the illuminance ratio inputted from the dimming module. When the short-circuit prevention module 70 is operated, It is possible to block the output of

6, 8, and 10, the dimming module 50 includes a communication unit 51, a processor 52, a plurality of resistor connection terminals 53, and an I2C interface unit 54.

The communication unit 30 can receive illumination control information from a user. The communication unit may use a Wi-Fi module, a ZigBee module, and a Bluetooth module.

The processor 52 detects the input illuminance information, receives the output voltage of the converter (ADC), senses the current flowing to the downstream LED module and the upstream LED module through the sensing unit 80, Can be output as an I2C interface type digital control signal.

Referring to FIGS. 8 and 10, a plurality of resistors WR1 to WR50 are arranged in parallel in a plurality of resistor connection terminals. The plurality of resistors may be formed so that the resistance values are different from each other, and the resistance value between adjacent resistors is increased or decreased in proportion to a predetermined ratio. For example, 50 resistors (WR1 to WR50) can be designed to have a resistance ratio difference of 2%. That is, WR1, WR2, ... WR50 can be set to increase the resistance ratio by 2% based on the maximum output voltage of the luminaire. When the WR25 terminal is connected using the resistance ratio of WR1 = 2%, the DC converter 60 receives the current corresponding to the resistance value, and outputs a voltage corresponding to 50% of the maximum voltage .

The dimming module uses an I2C interface method (a communication method for transferring control information using two lines). The I2C interface method of the present invention includes a line (SCL_SEL) for selecting the Up / Down and a line (SCL_SEL) for selecting Pulse Data corresponding to the resistors (for example, WR1 to WR50) (SCL_UD) to implement the resistance-voltage required for the dimming ratio by the user's request.

More specifically, the I2C interface unit 54 of the present invention can transmit a signal pulse that connects any one of a plurality of resistor connection terminals in accordance with the digital control signal (I2C_SEL, I2C_UD) received from the processor .

The signal pulse transmission of the I2C interface unit 54 can be performed as follows. For example, when you want to output 50W (50% of resistance) at rated output (when LED output is 100W), you need to connect resistor terminal of WR25 (2% × 25 = 50%) so that I2C_SEL signal is set to I2C_UD The pulse is transmitted 25 times.

That is, when lower pulse is applied to I2C_SEL and 25pulse is applied to the count of I2C_UD, the resistor connection terminal 53 connects the resistor WR25 to the output The corresponding current value is input to the DC converter 60 and the DC converter 60 can supply an output voltage that is reduced by 50% (50W if the current output voltage is 100W) using the input current value.

When the output of the downward LED module (present output 50W) is increased to 70W, the high pulse is applied to I2C_SEL and the I2C_UD count is set to 10pulse, the resistor connection terminal 53 is connected to the resistor WR10, The corresponding current value is input to the DC converter 60 and the DC converter 60 can supply an output voltage increased by 20% (60W if the current output voltage is 50W) using the input current value.

As described above, the dimming module of the present invention can adjust the dimming ratio value very precisely (for example, 1 to 2% ratio) by using a plurality of resistor terminals.

5 and 7, when the overcurrent flows to the output voltage of the up-facing LED module or the down-facing LED module or a short occurs, the short-circuit prevention module 70 causes the overcurrent (overvoltage) of the sensing unit 80 Can be operated. When the short-circuit prevention module 70 is operated, the DC converter 60 can cut off the output to the upward LED module or the downward LED module.

Referring to FIGS. 5 and 7, the short-circuit prevention module 70 may use a switching transistor Q4 or an FET.

Referring to the circuit diagram of FIG. 8, when the output current flows 120% to 150% or more of the set current during operation of the LED lamp, the overcurrent is supplied to the base of the transistor. In this case, the transistor Q4 turns on when the difference between the emitter set voltage of the transistor Q4 and the voltage applied to the base due to the overcurrent is equal to or higher than a predetermined voltage (for example, 0.7 V). Therefore, since the transistor Q4 is grounded and has a voltage of 0V, a low level is inputted to the EN terminal of the DC converter 60, so that the DC converter stops the output to the LED module. 8, even when the transistor Q4 is in the switch-on state, the present invention can be achieved by continuously supplying a predetermined voltage (3.3 V) to the collector of the transistor Q4 through the rectifying section D4 The collector voltage can be maintained) and the output stop state can be maintained even after the base voltage fluctuation.

As described above, since the up-down LED lamp of the present invention senses the output voltage supplied to the upper and lower LED modules in operation in real time, it can quickly shut off the circuit when the output is overloaded and the short circuit occurs, have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will readily appreciate that various changes, modifications, and variations may be made without departing from the spirit and scope of the invention, the foregoing description and the annexed drawings.

Claims (5)

A main housing 10 having a heat dissipating portion at an upper portion thereof, a downward LED module 20 attached to a lower portion of the main housing to irradiate light downward, and a plurality of LEDs, An ADC converter 40 fixed to the main housing and the upper side of the heat dissipation unit, and a controller 40 for controlling the illuminance of the downward LED module and the upward LED module, The current value generated by the dimming module 50 and the dimming module 50 which adjusts the output voltage of the downward LED module and the up-facing LED module 50 using the inputted current value, And a DC converter (60) for supplying a DC voltage
The dimming module 50 includes a communication unit 51 for receiving illuminance information from a user, a processor 52 for outputting the input illuminance information as a digital control signal of the I2C interface scheme, (SCL_SEL) for selecting up / down and a pulse data (Pulse Data) corresponding to a resistance terminal to be switched among the plurality of resistor connection terminals, a plurality of resistor connection terminals (53) And an I2C interface unit 54 for transmitting a signal pulse for connecting any one of a plurality of resistance connection terminals according to the digital control signal I2C_SEL and I2C_UD received from the processor, Lt; / RTI >
The lamp includes a short prevention module (70) operated by an overcurrent of the sensing part (80) when an overcurrent flows to the output voltage or a short circuit occurs, the short prevention module (70) is a switching transistor,
When the sensing unit 80 senses an overcurrent, the switching transistor is switched on and a low level is input to the EN terminal of the DC converter 60 so that the DC converter 60 is turned on Wherein the lamp stops supplying the predetermined voltage to the collector of the transistor Q4 through the rectifying part D4 to maintain the output stop state even when the base voltage fluctuates. The LED module of claim 1, wherein the downward LED module (20)
A lower LED lens portion 21 to which a plurality of LEDs are fixed;
And a lower PCB substrate (22) to which the lower LED is bonded,
The upward LED module (30)
And an upper PCB substrate (31) having a diameter larger than the outer periphery of the lower LED lens portion (21) and having a larger radius than the outer periphery of the lower LED lens portion (21);
And an upper housing (32) covering and protecting the upper PCB substrate (31).
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