KR101312628B1 - Low Voltage Driving Prevention Apparatus for Light Emitting Diode Lamp - Google Patents

Abstract

Low voltage lighting prevention device of the LED bulb according to the present invention In the low voltage lighting prevention device of an LED (Light emitting diode) light bulb having an AC filter unit and an AC / DC converter, the DC current applied from the AC / DC converter is input and serially connected to any one power line. It is a power circuit using a connected Silicon Controlled Rectifier (SCR) and a Diac (Phase Trigger Device) connected in parallel to the anode and cathode of the input power source while being connected to the gate of the SCR. A configured low voltage lighting prevention unit is configured; The AC filter unit includes a surge absorber (SA) configured in parallel to an AC power input between a power supply and an AC / DC converter, and an overvoltage protection configured in parallel to an AC power input formed at the rear of the surge absorber. Consists of varistors; LED light bulbs are finely lit due to the complete attenuation and absorption of momentary overvoltage or surge current, even when the LED bulb is turned off, when the display lamp is built in the wall switch, when the phase of the commercial power input to the LED bulb is changed, or due to a short circuit. There is no half-fire phenomenon, the power is reduced, the life of the LED bulb is extended, and the use of a relatively short-lived transistor is not used to extend the life and improve the efficiency of the LED bulb.

Description

Low Voltage Driving Prevention Apparatus for LED Bulb {Low Voltage Driving Prevention Apparatus for Light Emitting Diode Lamp}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low voltage lighting prevention device of an LED (Light Emitting Diode) light bulb. Specifically, a silicon controlled rectifier (SCR) which prevents fine lighting or half-burning from occurring in a lighting lamp even when the lighting switch is turned off. : Silicon Controlled Rectifier) The low voltage lighting prevention device of LED bulb which consists of a circuit.

Currently, discharge lamps such as fluorescent lamps, incandescent lamps and halogen lamps are used as light sources for indoor lighting in homes and offices. Since the discharge lamp has a high driving voltage, the energy consumption is large due to the boost of the power, and when discharged, the discharge lamp discharges discharge gas such as mercury, which is harmful to the human body or the environment.

In particular, in the European Union, heavy metals such as lead, mercury, cadmium, hexavalent chromium (Cr6 +), and hazardous substances such as polybrominated diphenyl ether (PBB) and polybrominated diphenyl ether (PBDE) Restoring the use of Hazardous Substances (RoHS) and the Waste Electrical and Electronic Equipment Directive (WEEE) that require producers to bear the costs of recycling waste electrical and electronic products. The law was enacted and has been in effect since July 1, 2006.

Accordingly, the necessity of research and development of a new luminaire that can replace a luminaire such as a fluorescent lamp currently used is emerging.

In addition, as the technology related to LED (Light Emitting Diode) is rapidly developed, white LEDs emitting white light by using blue LEDs and phosphors have emerged. Small size, low power consumption, semi-permanent life, no harmful emissions such as ultraviolet light, no environmentally friendly lighting source without mercury and discharge gas. have.

The low-voltage driving prevention circuit of Fig. 1, which is disclosed in Korean Patent Registration No. 20-0437547,

A condenser 110 connected between the port 105 and the LED bulb 100 connected to the switch operation control unit and a bridge diode 120 connected between the condenser 110 and the LED bulb 100. A bridge diode, a Zener diode 130 connected directly between the bridge diode 120 and the LED bulb 100, and a transistor 140 connected directly between the Zener diode 130 and the LED bulb 100. And an inductor 150 connected in series between the other port 105 'connected to the switch operation control unit and the bridge diode 120, the inductor 150 is connected in parallel to the capacitor 110, Zener diode 130 and the LED bulb 100 is connected in parallel to the bridge diode 120, The condenser 110 is connected between the one side port 105 and the LED bulb 100 so that the condenser 110 is electrically connected between the emergency switch operation control unit and the LED bulb 100.

The transistor 140 connected between the Zener diode 130 and the LED bulb 100 applies a predetermined voltage applied from the Zener diode 130 when a normal prescribed voltage is applied by the emergency switch operation control unit, .

The Zener diode 130 prevents the power supply from being applied to the transistor 140 when a low voltage is applied to the Zener diode 130 in a non-inductive state other than the predetermined voltage for recognizing an emergency situation from the power source, so that the LED bulb 100 of the emergency switch is weak A flickering anti-flame phenomenon is prevented.

Since the prior art prevents the operator from operating the emergency switch by mistaken the situation, it is to prevent various accidents due to the emergency switch malfunction.

The low voltage driving prevention circuit of the prior art has a problem that the transistor is controlled by the internal temperature of the LED bulb and thus the prevention of the half-fire phenomenon is not constant.

In addition, the prior art has a problem that the life of the LED bulb is shortened by the specific components as the transistor dissipates heat beyond the allowance, and the efficiency of the LED bulb due to heat loss during switching of the transistor is reduced. There is a problem that is reduced.

The present invention has been made to solve the above problems, in the low-voltage lighting prevention device of the LED (LED) light bulb is composed of an AC filter unit and AC / DC conversion unit, applied in the AC / DC conversion unit Low voltage consisting of a DC circuit, a silicon controlled rectifier (SCR) connected in series to one of the power lines, and a power circuit using a diac (triac: trigger element for phase control) connected in parallel to the input power. Low voltage lighting prevention device of LED bulb which prevents the LED bulb from finely lighting or semi-lighting due to a short circuit when the phase of commercial power input to the LED bulb is changed even when the LED bulb is turned off by configuring the lighting prevention unit. In providing.

The low voltage lighting preventing device of the LED bulb according to the present invention is a low voltage lighting preventing device of an LED (Light emitting diode) light bulb comprising an AC filter unit and an AC / DC converter, DC current applied from the AC / DC converter To prevent the low-voltage lighting consisting of a power circuit using a Silicon Controlled Rectifier (SCR) connected in series to one of the power lines and a Diac (trigger for phase control) connected in parallel to the input power. It is an additional configuration.

In addition, the present invention is a surge absorber (SA) configured in parallel to the AC power input between the power supply and the AC / DC conversion unit and the low voltage lighting prevention unit, and the AC power is configured and input to the rear of the surge absorber It is composed of varistors (VR1) for overvoltage protection in parallel.

In addition, the present invention further comprises a capacitor 3 in which the low voltage lighting prevention part is connected in parallel to the anode and the cathode of the AC / DC converter.

In addition, the present invention is the silicon control rectifier (SCR) is connected in series to the anode (AC) of the AC / DC converter, and the diac is connected to the gate (gate) of the silicon control rectifier (SCR) while the anode of the AC / DC converter It is connected in parallel to the cathode (Cathode).

In addition, the low-voltage lighting prevention unit is connected to the gate of the diac and silicon control rectifier (SCR) in series at the same time, the resistance 3 is further configured to be connected to the cathode (Cathode) of the AC / DC converter.

In addition, the low voltage lighting prevention unit of the present invention further comprises a resistor 2 connected in parallel to the cathode and the anode of the AC / DC conversion unit, the capacitor 4 is connected in series with the resistor 2 in parallel to the cathode and the anode is further configured The diaak is connected to a power source between the resistor 2 and the capacitor 4.

The low voltage lighting prevention device of the LED bulb according to the present invention, even when the LED bulb is extinguished, the LED bulb is finely lit or semi-lit due to the case where the display lamp is built in the wall switch and the phase of the commercial power input to the LED bulb is changed and a short circuit occurs. There is an effect that does not occur phenomenon.

In addition, the present invention has the effect that the power is reduced and the lifespan of the LED bulb is not generated because the fine lighting or half-light phenomenon does not occur.

In addition, the present invention the surge absorber to block or absorb the initial instantaneous overvoltage or surge current of the alternating current applied from the power source to completely attenuate and absorb the momentary overvoltage or surge current It works.

In addition, according to the present invention, after the current is charged in the condenser 4 by the time constant circuit composed of the resistor 2 and the condenser 4 connected in series, the power supply and the constant time are reduced by the output of the trigger signal to the gate of the silicon controlled rectifier. In addition, by supplying a current to the LED bulb, there is an effect that can protect the LED bulb double.

In addition, the present invention has the effect of extending the life of the LED bulb and the efficiency is improved by not using a transistor having a relatively short lifespan and poor efficiency.

In addition, the present invention is configured to supply power to the LED bulb at the initial lighting voltage of the LED bulb greater than the fine lighting voltage by using a silicon controlled rectifier (SCR) has an effect that does not interfere with the lighting of the LED bulb.

1 is a circuit diagram of a conventional low-voltage drive preventing LED bulb;
Figure 2: LED bulb picture with afterglow phenomenon at low voltage of the prior art.
3 is a block diagram of a low voltage lighting prevention device of the LED bulb of the present invention.
4 is a block diagram of a low-voltage lighting prevention device of the LED bulb of the present invention.
5 is a picture of the LED bulb to which the present invention is applied without low light phenomenon at low voltage.

Block diagram of the low voltage lighting prevention device of the LED bulb of the present invention of Figure 3 attached to the configuration and operation according to an embodiment of the present invention, configuration diagram of the low voltage lighting prevention device of the LED bulb of the present invention of Figure 4 and When described in more detail with reference to the LED bulb to which the present invention is applied without a low light phenomenon at low voltage of the following.

In Korea, about 50% of aging buildings are leaking as much as the body does not feel in the aging buildings themselves, and even new buildings are leaking due to moisture in the rainy season.

Due to such a short circuit, a fine current flows to the LED bulb, which causes the LED bulb to be finely lit or a semi-light phenomenon. The present invention is intended to prevent such a phenomenon.

The low-voltage lighting prevention device of the LED bulb of the present invention is composed of an AC filter unit 1 and a low-voltage lighting prevention unit 4 and their detailed configurations to provide a circuit from an instantaneous overvoltage or surge current of an AC current supplied from a power source. Silicon Controlled Rectifier (SCR) to prevent conduction of microcurrent to LED bulbs LP and LM to attenuate and prevent LED bulbs LP and LM from being finely lit or semi-burning. It is a circuit.

The AC filter unit 1 includes a surge absorber (SA1) and a rear of the surge absorber (SA1) configured in parallel to an AC power input between the power source and the AC / DC converter (3). And it is composed of varistor (VR1) for overvoltage protection which is configured in parallel to the AC power input.

The AC filter unit 1 is composed of input protection elements of a circuit of the low voltage lighting prevention device of the LED bulbs LP and LM, and includes an overcurrent protection fuse configured on any one input line ACIN1 of an AC power source. FUSE1, an overvoltage protection surge absorber SA1 configured in parallel to the AC power sources ACIN1 and ACIN2 configured and input behind the fuse FUSE1, and configured and input behind the surge absorber SA1. It consists of the overvoltage protection varistor VR1 comprised in parallel with AC power supply ACIN1 and ACIN2.

The AC filter unit 1 attenuates and absorbs an instantaneous overvoltage or surge current generated from an alternating current applied from a power source to be supplied to a plurality of LED bulbs that are turned on when current flows to generate light. Protects the circuit of the low voltage lighting prevention device of the LED bulbs LP and LM.

The surge absorber SA1 attenuates the initial instantaneous overvoltage or surge current among the instantaneous overvoltage or surge current applied from the power supply, and the varistor VR1 receives the late instantaneous overvoltage or surge current from the instantaneous overvoltage or surge current applied from the power supply. It absorbs and protects the circuit of the low voltage lighting prevention device of the LED bulb.

The surge current is a very short time, but the waveform and amplitude change according to the flow time. Initially, the waveform is high, i.e., the peak is high and the amplitude is small, but as time goes by, the waveform is low and the amplitude is large, and the current component becomes larger toward later stages.

The surge current inputted by the surge absorber SA1 is first attenuated, and the varistor VR1 absorbs the surge current flowing without being attenuated by the surge absorber SA1.

Among the surge currents inputted to the AC filter unit 1, the initial surge current, i.e., the surge current having a high peak and short period, is attenuated by the surge absorber SA1, and the surge current that has a low late peak and a longer period is used. The varistor VR1 absorbs and completely attenuates and absorbs the surge current input to the AC filter unit 1.

The surge absorber SA1 causes the current to flow through the surge absorber SA1 itself when the AC power sources ACIN1 and ACIN2 input from the power supply exceed a predetermined voltage so that the voltage drop generated from the load is excessive. Protects the load by preventing it from rising.

In other words, when a surge current enters the low-voltage lighting prevention device of the LED bulb, a surge current flows through a passage of low impedance, that is, a surge absorber SA1, that is, it becomes a bypass by itself. To prevent circuit failure.

The varistor VR1 does not attenuate the surge absorber SA1 when the AC power inputs ACIN1 and ACIN2 that flow into the input exceeds a predetermined voltage, thereby lowering the resistance value to flow a current, that is, bypassing itself (by-pass path). To prevent circuit failure.

That is, the varistor VR1 is configured to suppress the instantaneous voltage and discharge the high voltage current, and exhibits a high resistance value up to a predetermined constant voltage, but when the voltage exceeds the set voltage, the resistance suddenly decreases to flow a large current to input AC power ACIN1 and ACIN2. Protect the circuit from momentary overvoltage or surge current.

The fuse FUSE1 is configured to short-circuit to protect the circuit when any one of the allowable voltage or the allowable current exceeds the allowable value, and configure the fuse FUSE1 at the rear of the surge absorber SA1 or the varistor VR1. However, in this case, since the surge absorber SA1 and the varistor VR1 are difficult to protect even if the fuse FUSE1 is shorted, it is necessary to configure the fuse FUSE1 in front of the surge absorber SA1 and the varistor VR1. desirable.

The varistor VR1 may be any one of a symmetrical varistor whose resistance is determined by the magnitude of a voltage and an asymmetrical varistor whose polarity depends on the polarity of the applied voltage, irrespective of the polarity of the applied voltage.

Meanwhile, a voltage adjusting unit 2 may be configured between the AC filter unit 1 and the AC / DC converting unit 3, and the voltage adjusting unit 2 is applied from the AC filter unit 1. Input the AC current (ACIN1, ACIN2) to drop the voltage and adjust the input AC current (ACIN1, ACIN2).

The voltage regulator 2 is connected to a plurality of capacitors C1 and C2 configured in parallel with the input line ACIN1 connected to the fuse FUSE1 and serially connected to the input line ACIN1 connected to the fuse FUSE1. Consists of a resistor (R1: Resistance) for the discharge of the capacitor (C1, C2) is composed of an RC power supply circuit for generating a power supply voltage for the LED bulb to operate properly by the capacitor (C1, C2).

The voltage adjusting unit 2 is a component for dropping the AC input voltage with the capacitor C1 as the main shaft, and can adjust the voltage value falling according to the capacity of the capacitor. It consists of a plurality of capacitors.

The alternating current applied to the voltage regulator 2 is stored and charged in the capacitor C1, and the excess current remaining after being charged in the capacitor C1 is stored and charged in the capacitor C2.

That is, the AC current applied to the voltage adjusting unit 2 is sequentially charged in the order of the capacitor (C1) → capacitor (C2) ... capacitor (Cn-1) → capacitor (Cn) and the capacitor (C1, C2) AC current in the state of charging) does not flow, so the AC current does not flow.

At this time, when the AC current charged in the capacitors C1 and C2 becomes equal to or greater than a predetermined value, the resistor R1 connects the positive and negative terminals of the capacitors C1 and C2 while the capacitors C1 and C2 conduct A current flows and the current charged in the capacitors C1 and C2 is discharged.

The AC / DC converter 3 inputs an alternating current applied from the voltage adjusting unit 2 to convert it into a direct current, and a bridge rectifier circuit composed of rectifying diodes D1, D2, D3, and D4 (Diode). Bridge Rectifier).

The AC / DC converter 3 is a bridge rectifier circuit using rectification diodes D1, D2, D3, and D4, and converts the AC current dropped from the voltage regulator 2 into a DC current, and the bridge rectifier circuit. The cathode part of the diode D1 and the diode D3 is configured with the + part of the direct current, and is connected to the + part F1 and the LED + of the LED bulb, and the diode D2 and the diode D4 Anode part is composed of-part of DC current and is connected to-part (F2, LED-) of LED bulb.

The AC / DC converter 3 converts an AC voltage supplied from the voltage controller 2 into a DC voltage by using a bridge diode and outputs the DC voltage.

That is, even if the supply voltage supplied to the AC / DC converter 3 is a DC voltage or an AC voltage, the DC voltage is output by the bridge diode, and even if the polarity of the DC voltage is reversed inadvertently by the user's carelessness. The voltage output via the bridge diode has a DC voltage.

According to the present invention, the low voltage lighting prevention unit 4 is configured to prevent the LED bulbs LP and LM from being turned on due to the low voltage. The low voltage lighting prevention unit 4 includes an AC / DC conversion unit 3 and an LED bulb. A configuration between (LP, LM), i.e., a DC current applied from the AC / DC converter 3, and a silicon controlled rectifier (SCR1) connected in series to any one of the power lines and a diaak connected in parallel to the input power. It is composed of a power circuit using ((Diac: phase control trigger element: TD1) to prevent LED bulbs LP and LM from being finely lit or generating a half-fire phenomenon.

The silicon controlled rectifier SCR1 is connected in series with the anode of the AC / DC converter 3, and the diaak TD1 is connected to the gate of the silicon controlled rectifier SCR1 while being connected to the anode of the AC / DC converter 3. The diaak TD1 sends a trigger signal to the gate of the silicon controlled rectifier SCR1 so that the current flows to the gate of the silicon controlled rectifier SCR1 so that the main current is conducted.

The silicon controlled rectifier (SCR1) acts to open the gate when the anode and cathode are forward while current flows in the forward direction when the cathode and the gate turn-on voltage are applied to the gate. In this case, the current flows in the forward direction until the positive and negative voltages are lost or the reverse voltage is applied.

When the silicon control rectifier SCR1 is turned on by a gate pulse, that is, a trigger pulse, it can be regarded as a switch-on action by maintaining a conduction state. (Turn off) method should disconnect the power.

The low voltage lighting prevention unit 4 is configured to simultaneously connect the gate of the diac TD1 and the silicon controlled rectifier SCR1 in series, and includes a resistor 3 (R3) connected to the cathode of the AC / DC converter 3. The resistor 3 (R3) bypasses the trigger signal to the cathode while suppressing and controlling the operation of the diaak TD1.

The low voltage lighting prevention unit 4 includes a resistor 2 (R2) connected in parallel with the cathode and the anode of the AC / DC converter 3, and is connected in series with the resistor 2 (R2), but the AC / DC converter The condenser 4 (C4) connected in parallel with the cathode and anode of (3) is comprised.

The diaak TD1 of the low voltage lighting prevention unit 4 is connected to a power source between the resistor 2 (R2) and the capacitor 4 (C4) so that the current is initially supplied to the capacitor 4 (C4) by the resistor 2 (R2). After filling, the diaak TD1 sends a trigger signal to the gate of the silicon controlled rectifier SCR1.

The low voltage lighting prevention unit 4 further includes a capacitor 3 (C3) connected in parallel to the anode and the cathode of the AC / DC conversion unit 3, so that the capacitor 3 (C3) is a diaak ( The noise component that may be generated by the trigger signal of the TD1) is removed to provide a stable current to the LED bulbs LP and LM.

The diaak TD1 is a device in which a current flows while being turned on instantaneously when the voltage is higher than a certain degree, and is charged in a triangular waveform and the charged voltage is a turn on voltage, that is, a brake over voltage. When it is turned, the current is instantaneously discharged in the pulse waveform.

The diaak TD1 is a device capable of flowing current in both directions during normal operation, and is composed of two terminals, an anode and a cathode, and conducts when any polarity at both ends of the two terminals reaches a starting voltage. And turns off when the current falls below the holding current.

The operation of the low voltage lighting prevention unit 4 is controlled by the silicon control rectifier SCR1 because the trigger signal is not present at the gate of the silicon control rectifier SCR1 even when power is input through the AC / DC converter 3 at the initial stage of lighting. (Turn on) state, that is, the current is not energized to the LED bulb (LP, LM) is maintained as the LED bulb (LP, LM) is not lit.

The regulated current passes through the resistor 2 (R2) while limiting and adjusting the current applied from the AC / DC converter 3 to a current value suitable for the diaak TD1 in the resistor 2 (R2). Starts to charge, and as the current is continuously charged in the capacitor 4 (C4), the voltage of the capacitor 4 (C4) increases.

When the voltage of the condenser 4 (C4) reaches the trigger start voltage of the diaak (TD1), the diaak (TD1) is turned on momentarily (Turn on) to discharge the pulse waveform current, the discharged pulse waveform current The silicon control rectifier SCR1 is turned on by being sent to the gate of the silicon control rectifier SCR1 to become a trigger signal for turning the gate on.

When the gate of the silicon control rectifier SCR1 is turned on, the current input from the AC / DC converter 3 reaches the LED bulbs LP and LM while the current flows in the forward direction of the cathode from the anode to the LED bulb LP. LM) lights up.

When the gate of the silicon controlled rectifier (SCR1) is connected once, the current flows in the forward direction until the positive and negative voltages are lost or the reverse voltage is applied. Therefore, the trigger operation of the diaak (TD1) blocks the commercial voltage of the input. Since it is maintained continuously until the silicon control rectifier (SCR1) is also maintained in the conduction (Turn on) mode, the LED bulb (LP, LM) is continuously lit.

Since the silicon control rectifier SCR1 is electrically turned off by the trigger signal and then turned off by disconnecting the power supply, the interruption of the trigger signal turns off the LED bulbs LP and LM.

Therefore, when the LED bulbs LP and LM are turned off, that is, when the power switch of the LED bulbs LP and LM is turned off, the trigger signal is cut off.

 As a result of our own experiments, the 5W LED bulb showed fine lighting or afterglow at 35V current, and the 10W LED bulb showed fine lighting or afterglow at 50V.

In general, the LED bulb is not required to turn on the LED bulb at a voltage of 35 ~ 120V, so if the LED bulb is configured not to turn on in this section, the LED bulb does not generate fine lighting or afterglow.

When the starting voltage of the diaak TD1 is configured to operate at 120V or more, that is, the lighting voltage of the LED bulbs LP and LM, the LED when the trigger starting voltage of the diaak TD1 is 120V or less. Light bulbs LP and LM do not light up.

In other words, when the phase of the commercial power input to the LED bulb is changed, the current or the leakage current is much lower than 120V and the human body does not feel the low voltage, which does not reach the trigger starting voltage of the DIAC TD1. , The LM is not turned on so that the LED bulbs LP and LM are prevented from being turned on by the low voltage, and thus the fine lighting or the half-light phenomenon does not occur.

As a result of self-testing, when a current of 62V flows in a 10W LED bulb, the LED bulb of the prior art has a afterglow phenomenon as shown in FIG. 2, but the LED bulb to which the present invention is applied has a afterglow phenomenon as shown in FIG. 5. It did not occur.

Therefore, it is possible to sufficiently prevent fine lighting or afterglow phenomenon even in a 15W LED bulb or the like.

The resistor 3 (R3) is configured to control the output of the diaak (TD1) by inhibiting the operation of the diaak (TD1) serves to bypass the trigger signal to the cathode in accordance with the resistance value.

That is, the resistor 3 (R3) is controlled by limiting the current output from the diaak (TD1), and the current smaller than the resistance value, that is, the trigger signal smaller than the resistance value is bypassed to the negative electrode of the silicon control rectifier (SCR1) The gate is not turned on and a current larger than the resistance value, that is, a trigger signal greater than the resistance value is sent to the gate of the silicon controlled rectifier SCR1 so that the gate of the silicon controlled rectifier SCR1 is turned on. The driving current is supplied to the LED bulbs LP and LM so that the LED bulbs LP and LM are turned on.

Therefore, by using the resistor 3 (R3) it is possible to control the resistance value of the resistor 3 (R3) so that the silicon control rectifier (SCR1) is turned on to the desired voltage can be increased the initial lighting voltage. .

The capacitor 3 (C3) is to remove noise components that may occur during turn-on in the silicon controlled rectifier SCR1 and serves to stabilize the DC level of the power supply.

That is, the capacitor 3 (C3) is a silicon control rectifier (SCR1) is a current flows or cuts in accordance with the operation of the gate, so the gate of the silicon control rectifier (SCR1) is a switch action, so that the gate conducts by the trigger signal ( Capacitor 3 (C3) accumulates the noise that may occur when the switch is turned on, thereby lowering the noise voltage, thereby stabilizing the DC current that is input from the AC / DC converter 3.

The resistors 2 (R2), resistors 3 (R3), capacitors 3 (C3), and capacitors 4 (C4) can be configured in a plurality in parallel to be more finely adjusted, in the case of configuring a plurality of resistors (R2) The current applied from the AC / DC converter (3) is limited in resistance 2-₁ (R2-₁) and sequentially in the order of resistance 2-₂ (R2-₂) ... resistance 2-n (R2-n) When the resistor 3 (R3) is composed of a large number, the trigger signal is limited at the resistance 3-₁ (R3-₁) and the resistance 3-₂ (R3-₂) ... resistance 3 -n (R3-n) is controlled in order, and when capacitor 3 (C3) is configured in plural, noise generated by trigger signal is charged from capacitor 3-₁ (C3-₁), and capacitor 3- ₂ (C3-₂) ... charged sequentially in the order of 3-n (C3-n), and the current applied from AC / DC converter 3 when condenser 4 (C4) Is charged in condenser 4-₁ (C4-₁) and condenser 4-₂ (C4-₂) ... In the order of 4-n (C4-n) it is sequentially charged.

According to the present invention, even when the lamp is turned off, the LED bulb is not finely lit or the half-lit phenomenon due to the case where the display lamp is built in the wall switch and the phase of the commercial power input to the LED bulb is changed, and the short circuit does not occur. It saves power and extends the life of the LED bulb, and the surge absorber blocks or absorbs the initial instantaneous overvoltage or surge current of the AC current during the late instantaneous overvoltage or surge current. It has the effect of completely attenuating and absorbing.

 Although the present invention has been described in detail with reference to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by equivalents to the appended claims, as well as the appended claims.

1: AC filter unit 2: Voltage control unit
3: AC / DC converter 4: Low voltage lighting prevention part

Claims (6)

In the low-voltage lighting prevention device of the LED (Light emitting diode) light bulb is composed of an AC filter unit and an AC / DC conversion unit,
Input DC current applied from the AC / DC converter, and connect capacitor 3 (C3) connected in parallel to the anode and cathode of the power line, and parallel to the cathode and anode of the AC / DC converter. A resistor 2 (R2), a capacitor 4 (C4) connected in series with the resistor 2 (R2) in parallel with the cathode and the anode, and a silicon controlled rectifier (SCR1) connected in series with the anode of the AC / DC converter. Is connected to the gate of the silicon controlled rectifier (SCR1) and connected in parallel to the anode and the cathode of the AC / DC converter and connected to a power source between the resistor 2 (R2) and the capacitor 4 (C4): Diac: The low voltage of the power circuit consisting of a phase control trigger element and a resistor 3 (R3) connected at the same time in series with the gate of the DIAC (TD1) and the silicon controlled rectifier (SCR1) and connected to the cathode of the AC / DC converter. The prevention part is configured;
The capacitor 3 (C3) stabilizes the DC level of the power supply by removing a noise component that may occur when the gate is turned on due to the trigger signal of the diaak (TD1), and is turned on by the resistor 2 (R2). After the current is filled in the capacitor 4 (C4), the diaak TD1 sends a trigger signal to the gate of the silicon controlled rectifier SCR1, and the diaak TD1 triggers to the gate of the silicon controlled rectifier SCR1. Current is flowed to the gate of the silicon controlled rectifier (SCR1) to conduct the main current, and resistor 3 (R3) bypasses the trigger signal to the cathode while suppressing and controlling the operation of the diamond (TD1). Low-voltage lighting preventing device of the LED bulb, characterized in that the bulb is not finely lit or half-burning occurs.
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