KR20110101697A - The ac power led illuminating apparatus having supply function of constant current - Google Patents

Abstract

According to the present invention, a plurality of LEDs are connected in series to implement LED lighting to be driven by alternating current by setting the number of LEDs, and the power supplied to the series-connected LED driving units can be constantly supplied at all times. The present invention relates to an AC power LED lighting device having a constant current supply function that can prolong the stable driving and service life of a device by proposing the optimal number of LEDs to allow the LEDs to be driven most stably.
To this end, the present invention, after receiving the AC power that is the driving source of the device, rectified by the bridge rectifier circuit, and applying the rectified power to a plurality of LEDs connected in series, the applied power is dropped to each LED An LED driver for driving the LED as power is applied; When the rectified power is applied to a plurality of LEDs, a constant current supply unit for supplying only the power of the desired current to have a stable power supply function, comprising a; LED to be optimized to drive by the desired constant current It is composed of 27 ~ 87 numbers in series for 100V ~ 240V commercial power.

Description

AC power LED illuminating apparatus having supply function of constant current}

The present invention relates to an AC power LED lighting device having a constant current supply function. In detail, the present invention implements an LED lighting that is driven by alternating current by setting a number of LEDs by connecting a plurality of LEDs, so that the power supplied to the series-connected LED driver can be always constantly supplied, in particular, always constant The present invention relates to an AC power LED lighting device having a constant current supply function that can prolong the stable driving and service life of a device by proposing the optimal number of LEDs to allow the LEDs to be driven most stably under power supply.

In general, the advertising lighting used in the interior, exterior lighting of buildings, especially indoors, outdoor advertising is typically implemented by installing a fluorescent lamp or a halogen in a specific position. Such a fluorescent lamp or a halogen lamp has a high power consumption, and mainly provides only monochromatic lighting.

In order to solve the high power consumption and the monotony of lighting, LED lighting devices have been manufactured and released in order to produce various colors of lighting with lower power consumption than fluorescent lamps or halogen lamps.

The LED lighting device as described above is configured by arranging a plurality of LED modules in which a plurality of LEDs are mounted in a specific arrangement, and installing the LED modules to a ceiling or a wall of a space. In particular, the LED module is applied to a power supply device called an SMPS (Switching Mode Power Supply) in the form of an A / D converter or more advanced by the characteristic that the LED is driven by a DC current of an appropriate voltage.

At this time, the LED lighting device has been proposed to remove the SMPS in a more advanced form in consideration of the complexity of the configuration by the SMPS. As described above, the LED lighting device without SMPS has been proposed to drive LEDs by performing a voltage drop on each LED by connecting a plurality of LEDs in series.

Here, the LED lighting device is a LED driving circuit by the LED part mounted by arranging a plurality of LEDs on the printed circuit board, and the driving circuit part installed on a separate printed circuit board several elements for driving the LED. It is configured and applied.

In particular, the LED is mainly applied to the SMD-type device, which is known that the two or more light emitting chips are connected in parallel in the device is a built-in compact structure.

In the LED lighting apparatus as described above, a considerable overcurrent is frequently applied to the LEDs by a considerable number of module configurations in which a plurality of LEDs are arranged. In other words, the voltage and current applied from the power supply unit are proportional to the distance, so that the LED modules connected in the specific form as described above are more overheated as the adjacent ones of the power supply unit are applied, thereby exposing the LED to overheat. The overheating of the LED generated in this way causes an unstable operation of the LED lighting and at the same time causes a problem of shortening the service life of the LED itself.

The present invention has been invented to solve the above problems.

Accordingly, the present invention provides a configuration for allowing a current of the power input to the LED driver connected to a plurality of LEDs to be always applied in a constant amount, and suggests the number of series connection of the LEDs for each commercial power among the lighting It is an object of the present invention to provide an LED lighting device capable of driving the device stably and extending the service life of the LED.

In order to achieve the above object, the present invention has the following configuration.

The present invention receives an AC power source that is a driving source of the device, rectifies it by a bridge rectifier circuit, and then applies the rectified power source to a plurality of LEDs connected in series, thereby reducing the applied power source. An LED driver for driving the LED as applied; When the rectified power is applied to a plurality of LEDs, a constant current supply unit for supplying only the power of the desired current to have a stable power supply function, comprising a; LED to be optimized to drive by the desired constant current It is composed of 27 ~ 87 numbers in series for 100V ~ 240V commercial power.

At this time, when the LED is connected in series with a red LED array, the LED for optimizing the driving by the desired constant current is set in the number of 45 ~ 125 for the commercial power of 100V ~ 200V is configured in series connection.

Here, the constant current supply unit is applied to a constant current regulator (CCR) in the form of a device.

Alternatively, the constant current supply unit may be applied as a constant current supply circuit by connecting a zener diode and another FET to a circuit composed of a control element for controlling the supply of current to the LED driver and a field effective transistor (FET). .

Alternatively, the zener diode and another Bipolar Junction Transistor (BJT) may be connected to a circuit composed of a control element that controls the supply of current to the LED driver, and a field effective transistor (FET). It can also be applied as a constant current supply circuit.

In particular, the number of the LED is configured by calculating one LED each of a single light emitter, or a plurality of light emitting chips installed inside the SMD type LED to one each.

As described above, the present invention is to ensure that a constant amount of current is always supplied to the LED driver to eliminate the overload factor applied to the LED and the driving circuit, so that the driving of the device is stably performed and the service life of the LED is extended. It is effective.

In addition, the present invention proposes the number of series connection of the LED to obtain the most ideal lighting efficiency as a constant amount of current is always supplied to the LED driver to obtain a more stable drive of the device to improve the reliability of the product There is.

1 is a block diagram of an LED lighting apparatus according to the present invention.
2a to 2c is a circuit diagram of the LED lighting apparatus according to the present invention.
Figure 3 is a LED perspective view of the LED lighting apparatus according to the present invention.
Figure 4 is an exemplary view of the internal LED configuration of the LED lighting apparatus according to the present invention.

1 is a block diagram of an LED lighting apparatus according to the present invention, Figures 2a to 2c is a circuit diagram of the LED lighting apparatus according to the present invention, Figure 3 is a perspective view of the LED lighting apparatus according to the present invention, Figure 4 is LED internal configuration example of the LED lighting device.

Referring to the drawings, the LED lighting apparatus according to the present invention comprises an LED driver 10 and a constant current supply unit 20.

The LED driver 10 is provided with a bridge rectifier circuit 11 for receiving and rectifying the AC power that is the driving source of the device, and receives the power rectified by the bridge rectifier circuit 11 in each element A plurality of LEDs (L) are configured in series so that the voltage drop is performed and driven.

Here, the AC power source is a 100V ~ 240V power source commonly used as a Korean standard, the number of LED (L) to be described later is set by these voltage values. At this time, the number of the LED (L) is a voltage drop is generated by the number connected in series, the number of columns of the LED (L) connected in parallel can be variously applied by the number of LED (L) required by the user. have.

The constant current supply unit 20 is electrically connected to the LED driver 10 so that the rectified power by the bridge rectifier circuit 11 is always supplied to the power of the desired current when applied to a plurality of series-connected LED (L). It is a structure for doing so.

2A to 2C show an LED driving circuit driven by a constant current.

2A illustrates a configuration in which the constant current supply unit 20 is applied to a constant current regulator (CCR) 21 in the form of an element.

FIG. 2B shows a zener diode 24 and another FET in a circuit composed of a control element 22 and a field effective transistor (FET) 23 in which the LED driver 10 controls the supply of current. It shows the configuration applied to the constant current supply circuit by connecting 23).

FIG. 2C shows a Zener diode 24 and another BJT in a circuit composed of a control element 22 for controlling the supply of current to the LED driver 10, and a field effective transistor (FET) 23. Bipolar Junction Transistor: A configuration in which a constant current supply circuit is formed by connecting a bipolar junction transistor 25.

The number of series connection of the LED (L) optimized to drive by the constant current supply unit 20 as described above is configured in series number of 27 ~ 87 for commercial power of 100V ~ 240V.

At this time, the LED (L) is specified by setting the voltage drop is generated by the input power to one object to drive light emission. That is, the LED (L) is manufactured in the form of a single light emitting LED (L) or SMD (Surface Mounted Device (Surface Mounted Device)) as shown in FIG. As a single light emitting LED (L) is calculated by itself as one, SMD-type LED (L) is set by calculating each of the light emitting chip (L ') therein as one in Fig. Done.

Experimental Example

25A of the circuit having the constant current supply unit 20 of FIGS. 2A to 2C, the number of LEDs (L) of the above-described commercial power supply and each LED driver 10, and the like are most suitable for driving the LED driver circuit. Maintaining the current at and measuring the constant current at the input and output terminals using a digital meter, the power factor data as shown in Table 1 was obtained.

Here, the LED (L) was experimented by applying the LED (L) for emitting white light as a device having a driving voltage of 3.0V ~ 3.5V, respectively.

Commercial power Serial CHP Quantity (EA) LED Series Voltage (3.0V to 3.5V) Power factor

100 VAC (141 V) 27 87 0.945 30 97 0.93 33 107 0.915 36 117 0.9 39 126 0.88

110 VAC (155 V) 30 97 0.945 33 107 0.93 36 117 0.915 39 126 0.9 42 136 0.88

120 VAC (169 V) 33 107 0.945 36 117 0.93 39 126 0.915 42 136 0.9 45 146 0.88

220 VAC (310 V) 66 214 0.95 69 224 0.935 72 234 0.92 75 243 0.905 78 253 0.89 81 263 0.87

230 VAC (322 V) 69 224 0.95 72 234 0.935 75 243 0.92 78 253 0.905 81 263 0.89 84 273 0.87

240 VAC (338 V) 72 234 0.95 75 243 0.935 78 253 0.92 81 263 0.905 84 273 0.89 87 283 0.87

The series connection of LED (L) which has the best power factor compared to each commercial power source by the above experiment, that is, the ratio between the active power and the apparent power as close as possible to 1. I could get the count.

At this time, when the number of series connection of the LED (L) for each commercial power shown in Table 1 is small, the current of the supplied power showed an unstable characteristic. On the contrary, when the number of serial connections of LEDs (L) for each commercial power source is large, the current of the supplied power source is somewhat stabilized, but the power factor is rapidly lowered, indicating a low use efficiency for the supplied power source.

<Other Embodiments>

Another embodiment of the present invention proposes a case where the LED (L) for emitting red light is applied differently from the LED (L) applied in the experimental example of the original embodiment. As described above, the LED (L) emitting red light has a lower driving voltage than the LED (L) emitting white light with a driving voltage of 1.8V to 2.0V.

Due to this, when the LED driving circuit is configured as in the above-described experimental example and connected in series by applying the red LED (L) array, the LED (L) for optimizing the driving by the desired constant current is 100V to 200V (red The most stable current is supplied in 45 ~ 125 number for the commercial power of the optimum voltage for driving LED) and has a high power factor of 0.87 ~ 0.95.

10: LED driver 11: bridge rectification circuit
20: constant current supply unit 21: constant current regulator
22: control element 23: FET
24: Zener Diode 25: BJT

Claims (6)

After receiving the AC power that is the driving source of the device, rectifying it by the bridge rectifier circuit 11, and applying the rectified power to a plurality of LEDs (L) connected in series, the applied power drops to each LED ( An LED driver 10 to drive the LED L as power is applied to L); It is configured to include; a constant current supply unit 20 for supplying only the power of the desired current when the rectified power is applied to a plurality of LED (L) to have a stable power supply function;
LED (L) for optimizing the drive by the desired constant current is AC power LED lighting device having a constant current supply function, characterized in that the serial connection in the number of 27 ~ 87 for commercial power of 100V ~ 240V.
The method of claim 1, wherein the LED (L)
In case of series connection in red LED (L) array, LED (L) for optimization of operation by desired constant current is set as 45 ~ 125 number for commercial power of 100V ~ 200V and is connected in series AC power LED lighting device with supply function.
The method of claim 1 or 2, wherein the constant current supply unit 20
AC power LED lighting device having a constant current supply function, characterized in that applied to the constant current regulator (CCR) (21) of the element form.
The method of claim 1 or 2, wherein the constant current supply unit 20
A zener diode 24 and another FET 23 are connected to a circuit composed of a control element 22 and a field effective transistor (FET) 23 for controlling the supply of current to the LED driver 10. AC power LED lighting device having a constant current supply function, characterized in that the constant current supply circuit.
The method of claim 1 or 2, wherein the constant current supply unit 20
Zener diode 24 and another Bipolar Junction Transistor (BJT) in a circuit composed of a control element 22 for controlling the supply of current to the LED driver 10 and a Field Effective Transistor (FET) 23. : AC power supply LED lighting device having a constant current supply function, characterized in that the constant current supply circuit by connecting a junction transistor (25).
The method of claim 1 or 2, wherein the number of LEDs (L) is
Constant current supply function, characterized in that each LED (L) made of a single light emitter or each of the plurality of light emitting chips (L ') installed inside the SMD-type LED (L) is set to one each AC power LED lighting device.

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