KR102040513B1 - LED lamp drive control apparatus and the control method - Google Patents

Abstract

The present invention, when the LED (LED, light emitting diode) lamp having a ripple removing unit is turned off, the LED lamp is dimly lit by the voltage charged in the capacitor of the LED driving unit (LED power supply circuit) so that the afterimage remains The present invention relates to an LED lamp driving control device and a method of controlling the ripple elimination circuit operating power by sensing a power supply to quickly remove an afterimage, and to turn on a lamp more quickly.
The present invention relates to an LED lamp driving control device using a ripple removing unit for preventing the LED lamp from being lit by the charging voltage of the capacitor when the LED lamp is turned off, the output terminal of the rectifying unit rectifying the voltage received from the commercial power input unit. The first resistor and the seventh capacitor are connected in series, and the third resistor connected in series and one end of the first zener diode are connected to the intermediate point of the first resistor and the seventh capacitor, and the third connected in series One end of the resistor and the first zener diode is connected to one input terminal of the photocoupler, and one end of the LED lamp is connected to one end of the fourth resistor and the second zener diode connected in series, and the fourth resistor and the second connected in series. One end of the photocoupler is connected to the other end of the zener diode, the other output end of the photocoupler is connected to the operating power supply of the ripple removing unit, and the output of the ripple removing unit is an LED. And is connected to the other end of the lamp.

Description

LED lamp drive control apparatus and its control method {LED lamp drive control apparatus and the control method}

According to the present invention, when the LED (LED, light emitting diode) lamp including the ripple removing unit is turned off, the LED lamp is dimly lit by the voltage charged in the capacitor of the LED driving unit (LED power supply circuit) so that an afterimage remains. The present invention relates to an LED lamp driving control device and a method of controlling the ripple elimination circuit operating power by sensing an input power supply to quickly remove an afterimage, and to turn on a lamp more quickly.

In general, a power supply circuit of a light emitting diode mainly uses a method of transferring power to a LED lamp on a secondary side of a transformer through a transformer after performing a pulse width modulation (PWM) control of the rectified voltage. Here, a capacitor is used at both ends of the transformer (or line filter) to protect the LED lamp or to stabilize the voltage input to the LED lamp. However, in order to realize a high power factor, since a smooth electrolytic capacitor is not used on the primary input side, a ripple voltage is largely generated, and a flicker phenomenon of the light emitting diode is generated by the ripple current generated by the ripple voltage. The flicker phenomenon not only affects the lifetime and light efficiency of the light emitting diode, but also causes the user's eyes to easily fatigue.

Therefore, a ripple removal circuit (ripple removal unit) is used to remove ripples. In general, a ripple removal circuit is known, and a ripple cancellation element composed of one chip is also commercially available. As described above, a lot of consideration has been given to removing the ripple using the ripple cancellation circuit in the state where the LED lamp is lit.

In addition, when the LED lamp is turned off, an afterimage in which the LED lamp is dimly lit for a long time by a voltage charged in a capacitor on the input side or the output side of the transformer (or line filter), etc., also remains. It not only affects light efficiency, but also causes fatigue of the user's eyes easily. Conventionally, for this purpose, a discharge is made by using a discharge resistor, which results in a slow lighting due to the discharge of the capacitor discharged by the discharge resistor.

As described above, various methods have been discussed for the LED lamps to be dimly lit by the voltage charged in the capacitor when the LED lamps are turned off, but there are few methods that reliably eliminate these problems.

Therefore, the present invention, after the LED lamp is turned off, the afterimage remains dimly lit for a long time by the voltage charged in the capacitor is left to detect the input power to quickly remove the afterimage by controlling the operating power supply ripple cancellation circuit And LED lamp drive control device and control method that can be turned on quickly when the lighting is proposed.

In the prior art, Korean Patent No. 10-1423966 relates to a ripple removing apparatus of a light emitting diode power circuit.

1 is an equivalent circuit diagram of a driver IC in a ripple removing device of Korean Patent No. 10-1423966, in which a sensed value (input value of a feedback input terminal) is rectified through a regulator so that one input terminal of an operational amplifier is provided. (I.e., input to the feedback input stage) and receive a reference signal (the input value of the reference stage) to the other input terminal (reference stage) of the operational amplifier, and the operational amplifier compares the detected value with the reference signal to the comparison value. Accordingly, the ripple canceling device conducts or turns off the LED connection terminal connected to the LED lamp by the transistor.

The technical problem to be achieved by the present invention is that when the LED lamp having the ripple removing unit is turned off, when the LED lamp is dimly lit by the voltage charged in the capacitor of the LED driving unit (LED power supply circuit) and the afterimage remains, The present invention provides an LED lamp driving control apparatus and a method of controlling the ripple elimination circuit operating power to detect an afterimage and to remove the afterimage quickly and to turn on the LED more quickly.

In order to solve the above problems, the first embodiment of the present invention is commercially available in the LED lamp drive control apparatus using the ripple removing unit in order to prevent the LED lamp from being lit by the charging voltage of the capacitor when the LED lamp is turned off. The first resistor and the seventh capacitor are connected in series between the output terminal of the rectifier for rectifying the voltage received from the power input, and the third resistor and the first zener connected in series at the midpoint of the first resistor and the seventh capacitor. One end of the diode is connected, and the third resistor and the other end of the first zener diode connected in series are connected to one input terminal of the photocoupler, and one end of the LED lamp is connected to one end of the fourth resistor and the second zener diode connected in series. One end of the photocoupler is connected to the other end of the fourth resistor and the second zener diode connected in series, and the other output end of the photocoupler is the operating power of the ripple removing unit. It is connected to the stage, the output terminal of the ripple removing unit is characterized in that connected to the other end of the LED lamp.

According to a second embodiment of the present invention, in order to prevent the LED lamp from being turned on by the charging voltage of the capacitor when the LED lamp is turned off, the LED lamp driving control device using the ripple removing unit includes a voltage received from a commercial power supply input unit. The first resistor and the seventh capacitor are connected in series between the output terminal of the rectifying rectifier, and the third resistor and one end of the first zener diode connected in series are connected to the intermediate point of the first resistor and the seventh capacitor. The third resistor connected in series and the other end of the first zener diode are connected to the base of the second npn transistor, the collector of the second npn transistor is connected to the base of the first ppn transistor through the fifth resistor, and the second npn transistor of the second npn transistor The emitter is connected to ground, and one end of the LED lamp is connected to one end of the fourth resistor and the second zener diode connected in series, and the fourth resistor and the second zener connected in series. The other one of odd, the second, and the emitter of the 1pnp transistor connections, a and a collector of 1pnp transistor is connected to the operating power supply terminal of the reject ripple claim, the output terminal of the ripple rejection is characterized in that connected to the other end of the LED lamp.

When the power switch of the LED lamp driving control device is turned ON and the voltage charged in the seventh capacitor becomes larger than the breakdown voltage of the first zener diode, power is applied to the operating power terminal of the ripple removing unit so that the ripple removing unit Will be driven.

When the power switch of the LED lamp driving control device is turned OFF and the voltage charged in the seventh capacitor is lower than the breakdown voltage of the first zener diode, the operation of the ripple removing unit is stopped.

A twelfth resistor is further connected between the third resistor connected in series and the other end of the first zener diode and the ground.

One end of the LED lamp is connected to the + end of the third capacitor, and the-end of the third capacitor is connected to the ground of the ripple removing unit.

One end of the first inductor is mounted at the + end of the third capacitor, and one end of the second inductor is mounted at the-end of the third capacitor, and the second end is connected between the other end of the first inductor and the other end of the second inductor. A condenser can be mounted.

The second capacitor may be mounted in parallel with the third capacitor.

The commercial power input unit has a varistor and a commercial power input capacitor installed in parallel between the L-side connection terminal and the N-side connection terminal in contact with the socket, and both ends of the commercial power input unit capacitor are each equipped with an inductor, and the inductor is a rectifying unit. Connected with

In a third embodiment of the present invention, in the LED lamp drive control apparatus having an LED voltage control circuit for detecting the input voltage, in order to prevent the LED lamp from being lit by the charging voltage of the capacitor when the LED lamp is turned off, The output terminal of the rectifier for rectifying the voltage received from the commercial power input unit has a first resistor and a seventh capacitor connected in series, and a third resistor and a first zener diode connected in series at the midpoint of the first resistor and the seventh capacitor. One end of the first resistor is connected in series, and the other end of the first zener diode connected in series is connected to one input terminal of the photocoupler, and one output terminal of the photocoupler is connected to the base of the first transistor. One end of the fifth resistor is connected to the collector, and the other end of the fifth resistor is connected to the second zener diode connected in series and one end of the fourth resistor, and the second zener diode connected in series. The other end of the resistor and the fourth resistor is connected to the base of the first transistor, and a sixth resistor is connected between the base and the emitter of the first transistor, and the other end of the fifth resistor and the emitter of the first transistor are connected. A second capacitor is mounted therebetween.

In a fourth embodiment of the present invention, in order to prevent the LED lamp from being turned on by the charging voltage of the capacitor when the LED lamp is turned off, the LED lamp drive control apparatus having an LED voltage control circuit for sensing the input voltage, The output terminal of the rectifier for rectifying the voltage received from the commercial power input unit has a first resistor and a seventh capacitor connected in series, and a third resistor and a first zener diode connected in series at the midpoint of the first resistor and the seventh capacitor. One end of is connected, the third resistor connected in series and the other end of the first zener diode is connected to the base of the second transistor, the collector of the second transistor is connected to the base of the first transistor, The emitter is connected to ground, one end of the fifth resistor is connected to the collector of the first transistor, and one end of the second zener diode and the fourth resistor connected in series to the other end of the fifth resistor. The other end of the second Zener diode and the fourth resistor connected in series is connected to the base of the first transistor, and the sixth resistor is connected between the base and the emitter of the first transistor, and the other end of the fifth resistor A second capacitor is mounted between one end and the emitter of the first transistor.

The + end of the second capacitor is connected to one end of the first inductor, and the-end of the second capacitor is connected to one end of the second inductor, between the other end of the first inductor and the other end of the second inductor, The third capacitor is connected, and the LED lamp is connected between the + end of the third capacitor and the-end of the third capacitor.

 The fifth resistor may include two resistors in parallel, and a twelfth resistor is connected between the third resistor connected in series and the other side of the first zener diode and the ground.

When the power switch of the LED lamp driving control device is turned OFF and the voltage charged in the seventh capacitor becomes lower than the breakdown voltage of the first zener diode, the voltages at both ends of the second zener diode and the base and the emitter of the first transistor are reduced. The discharge is performed by a voltage equal to the intervoltage.

The LED lamp may be mounted in parallel with the second capacitor.

In the LED lamp driving control apparatus and control method thereof of the present invention, when the LED lamp including the ripple removing unit is turned off, the LED lamp is dimly lit by the voltage charged in the capacitor of the LED driving unit (LED power supply circuit) and the afterimage By detecting the remaining input power and controlling the power supply of the ripple elimination circuit, the afterimage can be removed quickly, and the lighting can be made faster. This makes the lifespan of the light emitting diode longer and makes the user's eyes more tired.

In the related art, the present invention solves a problem in that after operation of the ripple removing circuit, the afterimage remains when the light is turned off and the lighting is slowed by charging the capacitor discharged by the discharge resistor.

1 is an equivalent circuit diagram of a driver IC in the ripple removing apparatus of Korean Patent No. 10-1423966.
Fig. 2 shows an LED lamp driving control apparatus using the ripple removing unit of the first embodiment of the present invention.
3 shows an LED lamp driving control apparatus using the ripple removing unit of the second embodiment of the present invention.
4 is an example of a commercial power input unit located in front of the rectifying unit.
FIG. 5 is an overall configuration diagram of an LED lamp driving control apparatus using the ripple removing unit of FIG. 2.
6 shows a LED voltage control circuit for sensing an input voltage according to a third embodiment of the present invention.
FIG. 7 shows another LED voltage control circuit for sensing input voltage in the fourth embodiment of the present invention.
FIG. 8 is an overall configuration diagram of an LED lamp driving control apparatus including the LED voltage control circuit for sensing the input voltage of FIG. 6.

Hereinafter, an LED lamp driving control apparatus and a control method of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows an LED lamp driving control apparatus using a ripple removing unit (ripple removing circuit) to prevent the LED lamp from being turned on by the charging voltage of the capacitor when the LED lamp is turned off. . 2 illustrates a case where the rectifier power supply unit 100 and the LED driver 200 are isolated (insulated) using a photocoupler.
In the LED lamp driving control apparatus using the ripple removing unit of Figure 2, the first resistor between the output terminal of the rectifier 110 for rectifying the voltage received from the commercial power input unit 50 (that is, the output terminal of the bridge diode (BD1)). (R1, R2) and the seventh capacitor C7 are connected in series, the third resistor (R3) and the first connected in series at the midpoint of the first resistor (R1, R2) and the seventh capacitor (C7) One end of the zener diode ZD1 is connected, and the third resistor R3 and the other end of the first zener diode ZD1 connected in series are connected to one input terminal of the photocoupler PC1. In addition, a twelfth resistor R12 is connected between the third resistor R3 and the other end of the first zener diode ZD1 connected in series and the ground.
One end of the LED lamp 170 is connected to one end of the fourth resistor R4 and the second zener diode ZD2 connected in series, and the other of the fourth resistor R4 and the second zener diode ZD2 connected in series is connected. One end of the photocoupler PC1 is connected to one end, the other output end of the photocoupler PC1 is connected to the operation power supply terminal of the ripple removing unit 150, and the output terminal (LED) of the ripple removing unit 150 is an LED. Is connected to the other end of the lamp 170.

The rectifier 110 rectifies the voltage received from the commercial power input unit 50 (that is, the voltage received through the rectifier terminals 1 and 2) by the bridge diode BD1, and the output V1 of the rectifier 110 is The capacitor C7 is charged through the resistors R1 and R2.

When the power is turned on, the rectified voltage is charged to the capacitor C7 through the resistors R1 and R2 via the bridge diode BD1. At this time, when the voltage charged in the capacitor C7 becomes greater than the breakdown voltage of the zener diode ZD1, the zener diode ZD1 conducts and a current flows in the resistor R3. Thus, a current flows in the light emitting diode inside the photocoupler PC1. The phototransistor inside the photocoupler PC1 is ON, that is, conducts. Then, the power is applied to the operation power supply terminal VCC of the ripple removing unit 150 to drive the ripple removing unit 150. As a result, the ripple current flowing through the LED lamp 170 is removed to eliminate flickering. Here, the resistors R1 and R2 may be referred to as first resistors.

On the contrary, when the power supply is turned off, the voltage charged in the capacitor C7 becomes lower than the breakdown voltage of the zener diode ZD1, and the zener diode ZD1 is turned off so that no current flows in the resistor R3. The current does not flow to the internal light emitting diode of the photocoupler PC1, and the phototransistor inside the photocoupler PC1 is turned off. Therefore, power is not applied to the operation power supply terminal VCC of the ripple removing unit 150 through the photocoupler PC1, and thus, the operation of the ripple removing unit 150 is stopped and the ripple removing unit as shown in FIG. As a result, 150 is turned off, and the voltages charged in the capacitors C2 and C3 respectively connected to both ends (ie, the input side and the output side) of the line filter LF2 made of the inductor are blocked from flowing current to the LED.

In this manner, the voltages charged in the capacitors C2 and C3 are controlled.

The capacitors C2 and C3 are polarized capacitors, and the line filter LF2 is composed of two inductors, and one inductor is mounted between the + side of the capacitor C2 and the + side of the capacitor C3, and the-side of the capacitor C2. The other inductor is mounted between and the negative side of capacitor C3. In other words, one end of a different inductor is mounted at each of both ends of the capacitor C2, and the other end of the different inductor is respectively mounted at the input terminal of the rectifying unit.

The line filter is an electromagnetic noise removing filter. In some cases, the line filter LF2 may be omitted, and the capacitors C2 and C3 may be connected in parallel.

In FIG. 2, when the LED lamp is turned off, an afterimage in which the LED lamp is dimly lit by the voltage charged in the capacitor of the LED driving unit (LED power supply circuit) remains, so that the input power is sensed to control the operation of the ripple removing circuit. Not only can the afterimage be removed quickly, but it can be easily turned on quickly.

3 is a second embodiment of the present invention, in order to prevent the LED lamp from being turned on by the charging voltage of the capacitor when the LED lamp is turned off, another LED lamp driving control device using a ripple removing unit (ripple removing circuit) is shown. Indicates. 3 illustrates a case in which the rectifier power supply unit and the LED driving unit are not isolated.
In the LED lamp driving control apparatus of FIG. 3, the first resistors R1 and R2 and the seventh capacitor C7 are connected in series between the output terminals of the rectifier 110 rectifying the voltage received from the commercial power input unit 50. One end of the third resistor R3 and the first zener diode ZD1 connected in series is connected to the intermediate point of the first resistors R1 and R2 and the seventh capacitor C7. The other end of the third resistor R3 and the first zener diode ZD1 is connected to the base of the second npn transistor Q2, and the collector of the second npn transistor Q2 is connected to the first ppn transistor Q1 through the fifth resistor. ) And the emitter of the second npn transistor Q2 is connected to ground. A twelfth resistor R12 is connected between the third resistor R3 and the other end of the first zener diode ZD1 connected in series and the ground.
One end of the LED lamp 170 is connected to one end of the fourth resistor R4 and the second zener diode ZD2 connected in series, and the other of the fourth resistor R4 and the second zener diode ZD2 connected in series is connected. An emitter of the first ppn transistor Q1 is connected at one end, and is connected to an operating power supply terminal VCC of the ripple removing unit 150 at the collector of the first ppn transistor Q1, and an output terminal () of the ripple removing unit 150 is provided. LED) is connected to the other end of the LED lamp 170.

When the power is turned on, the rectified voltage is charged to the capacitor C7 through the resistors R1 and R2 via the bridge diode BD1. At this time, when the voltage charged in the capacitor C7 becomes greater than the breakdown voltage of the zener diode ZD1, the zener diode ZD1 is turned on so that a current flows in the resistor R3, and a current flows in the base of the transistor Q2. ) Is ON, i.e., is conducting. The collector terminal of transistor Q2 is connected to the base of transistor Q1 through resistor R5. When the transistor Q2 is turned on, current flows through the base of the transistor Q1 so that the transistor Q1 is turned on, that is, conducting. Then, power is applied to the operation power supply terminal VCC of the ripple removing unit 150 to drive the ripple removing unit 150, and as a result, the ripple current flowing through the LED lamp is removed to eliminate flickering.

On the contrary, when the power is turned off, the voltage charged in the capacitor C7 becomes lower than the breakdown voltage of the zener diode ZD1, and the zener diode ZD1 is turned off, so that no current flows in the resistor R3. If no current flows through the base of Q2, and the transistor Q2 is turned off, that is, the transistor is turned off, and thus the transistor Q2 is turned off, no current flows through the base of the transistor Q1 and the transistor is turned off. Q1 is turned off, i.e., not turned on. Accordingly, power is not applied to the operation power supply terminal VCC of the ripple removing unit 150 through the transistor Q1 to stop the operation. Therefore, the operation of the ripple removing unit 150 is stopped and the ripple removing unit 150 is turned off as a result, so that the voltages charged in the capacitors C2 and C3 connected to both ends of the line filter LF2 made of the inductor ( Electric current) to block the flow of current to the LED.

In this manner, the voltages charged in the capacitors C2 and C3 are controlled. When the power is turned on again, the capacitors C2 and C3 are partially charged, thereby eliminating the delay caused by the charging of the capacitors C2 and C3, thereby facilitating quick lighting upon re-lighting.

4 is an example of a commercial power input unit located at the front end of the rectifying unit 110.

As shown in FIG. 4, the commercial power input unit 50 positioned at the front end of the rectifying unit 110 in the first and second embodiments includes a plurality of connection terminals, that is, L contacting sockets (not shown). From the side connection terminals L and L and the N connection terminals N and N, a commercial power supply (for example, 220 V) is input through the fuse F1, and the L side connection terminals L and L and the N side connection terminals. The varistor VA1 and the commercial power input capacitor CX1 are mounted between (N, N), and both ends of the commercial power input capacitor CX1 are connected with one end of a different inductor and the other end of the different inductors. Is connected to the rectifier 110. Here, different inductors form a line filter LF1. That is, the line filter LF1 is disposed between both ends of the commercial power input capacitor CX1 and the rectifier 110.

FIG. 5 is an overall configuration diagram of an LED lamp driving control apparatus using the ripple removing unit of FIG. 2. That is, FIG. 5 shows an overall circuit diagram of an LED lamp driving control apparatus including a ripple removing unit when the rectifying power supply unit and the LED driving unit are isolated (insulated) using a photocoupler.

The LED lamp driving control apparatus of FIG. 5 includes the commercial power input unit of FIG. 4 and the LED driving unit 200 of FIG. 2.

The commercial power input unit 50 is a means for receiving a power signal from a commercial power supply (for example, 220V) and generating a power signal for driving the LED.

The rectifier 110 rectifies the power signal received from the commercial power input unit 50 and transmits the rectified power signal to the LED driver 200 and the PWM switching unit 400.

The PWM switching unit 400 provides a pulse width modulation (PWM) signal from the power signal to the LED lamp by using a PWM driver formed of a dedicated driving IC. The PWM driver can use a dedicated driver IC (PWM-IC) or LED driver IC for pulse width modulation control as a PWM driver.

The LED driver 200 drives the LED 170 by the PWM switching unit 400. In particular, when the power is turned on, the ripple removing unit 150 is driven to cause the ripple to flow through the LED lamp 170. The current is eliminated to eliminate flickering, and when the power is turned off, current flows to the LED by the voltage charged in the capacitors C2 and C3 connected to the two inductors forming the line filter LF2. do.

In FIG. 5, A, B, and C represent points connected to each other.

6 shows a LED voltage control circuit for sensing an input voltage according to a third embodiment of the present invention. FIG. 6 illustrates a case in which the rectifier power supply unit 100 and the LED driving unit 200 are isolated (insulated) using a photocoupler.
In the LED lamp driving control apparatus having an LED voltage control circuit for detecting the input voltage of FIG. 6, the output terminal of the rectifying unit 110 rectifying the voltage received from the commercial power input unit 50 (that is, the bridge diode BD1). Output stage) is a third resistor connected in series with the first resistor (R1, R2) and the seventh capacitor (C7), the third resistor connected in series at the midpoint of the first resistor (R1, R2) and the seventh capacitor (C7) One end of R3 and the first zener diode ZD1 are connected, and the other end of the third resistor R3 and the first zener diode ZD1 connected in series is connected to one input terminal of the photocoupler PC1. . A twelfth resistor R12 is connected between the third resistor R3 and the other end of the first zener diode ZD1 connected in series and the ground.
One output terminal of the photocoupler PC1 is connected to the base of the first transistor Q1, one end of the fifth resistor R5 is connected to the collector of the first transistor Q1, and the other of the fifth resistor R5 is connected to the base of the first transistor Q1. One end of the second zener diode ZD2 and the fourth resistor R4 connected in series is connected, and the other end of the second zener diode ZD2 and the fourth resistor R4 connected in series is connected to the first transistor (1). The sixth resistor R6 is connected between the base of the first transistor Q1 and the emitter.
The second capacitor C2 is mounted between the other end of the fifth resistor R5 and the emitter of the first transistor Q1. The + end of the second capacitor C2 is connected to one end of the first inductor (inductor connected to 2 and 3 of LF2), and the-end of the second capacitor C2 is connected to 1 and 4 of the second inductor LF2. One end of an inductor connected to the third inductor, and a third capacitor C3 is connected between the other end of the first inductor and the other end of the second inductor, and the + end and the third end of the third capacitor C3 are connected to each other. The LED lamp 170 is connected between the-ends of the three capacitors.

In FIG. 6, when the power is turned on, the rectified voltage is charged to the capacitor C7 through the resistors R1 and R2 via the bridge diode BD1. At this time, when the voltage charged in the capacitor C7 becomes greater than the breakdown voltage of the zener diode ZD1, the zener diode ZD1 conducts and a current flows in the resistor R3. Thus, a current flows in the light emitting diode inside the photocoupler PC1. The phototransistor inside the photocoupler PC1 is ON, that is, conducts. Then, the emitter and the base of the transistor (Q1 in FIG. 6) are short-circuited so that the voltage between the emitter and the base of the transistor Q1 is close to 0V, and the transistor Q1 is turned off.

On the contrary, when the power supply is turned off, the voltage charged in the capacitor C7 becomes lower than the breakdown voltage of the zener diode ZD1, and the zener diode ZD1 is turned off so that no current flows in the resistor R3. The current does not flow to the internal light emitting diode of the photocoupler PC1, and the phototransistor inside the photocoupler PC1 is turned off. The resistor R6 is applied between the base and the emitter of the transistor Q1. Then, the voltages charged to the capacitors C2 and C3 are applied to the resistors R5 and R51 and the transistor Q1 by the voltages across the LEDs (LED V / F), and the transistor Q1 is turned on. As a result, current flows to discharge the voltage equal to the voltage of both the zener diode ZD2 and the voltage VBE between the base and the emitter of the transistor Q1. As a result, control is made to discharge the voltage charged in the capacitors C2 and C3.

When the power is turned on again, the capacitors C2 and C3 are partially charged, thereby eliminating the delay caused by the charging of the capacitors C2 and C3, thereby facilitating quick lighting upon re-lighting.

That is, when the power is turned on, the transistor Q1 is turned off and has no influence on the circuit of FIG. 6. When the power is turned off, the transistor Q1 is turned on to charge the capacitors C2 and C3. Discharge the discharged voltage.

Particularly, in the third embodiment, when there is no forced voltage control circuit, afterimages of the LED lamp 170 are turned off while the LED lamp 170 is turned off, the image remaining dimly lights up for a long time remains. By controlling the charging voltage, it is possible to remove the afterimage quickly and to easily turn on the lighting.

FIG. 7 shows another LED voltage control circuit for sensing input voltage in the fourth embodiment of the present invention. 7 illustrates a case in which the rectifier power supply unit and the LED driving unit are not isolated.
In the LED lamp driving control apparatus having the LED voltage control circuit for detecting the input voltage of FIG. 7, the output terminal of the rectifying unit BD1 rectifying the voltage received from the commercial power input unit 50 is the first resistor (R1, R2) And the seventh capacitor C7 are connected in series, and the third resistor R3 and the first zener diode ZD1 connected in series to the intermediate points of the first resistors R1 and R2 and the seventh capacitor C7 are connected in series. One end of is connected, and the third resistor R3 and the other end of the first zener diode ZD1 connected in series are connected to the base of the second transistor Q2. A twelfth resistor R12 is connected between the third resistor R3 and the other end of the first zener diode ZD1 connected in series and the ground.
The collector of the second transistor Q2 is connected to the base of the first transistor Q1 and the emitter of the second transistor Q2 is connected to ground. One end of the fifth resistor R5 is connected to the collector of the first transistor Q1 and one end of the second zener diode ZD2 and the fourth resistor R4 connected in series to the other end of the fifth resistor R5. The other end of the second zener diode ZD2 and the fourth resistor R4 connected in series is connected to the base of the first transistor Q1, and between the base and the emitter of the first transistor Q1. The sixth resistor R6 is connected.
The second capacitor C2 is mounted between the other end of the fifth resistor R5 and the emitter of the first transistor Q1. The + end of the second capacitor C2 is connected to one end of the first inductor (inductor connected to 2 and 3 of LF2), and the-end of the second capacitor C2 is connected to 1 and 4 of the second inductor LF2. One end of the inductor connected to the third inductor, and a third capacitor C3 is connected between the other end of the first inductor and the other end of the second inductor, and the + end and the third end of the third capacitor C3 are connected. The LED lamp 170 is connected between the-ends of the three capacitors.

In FIG. 7, when the power is turned on, the rectified voltage is charged to the capacitor C7 through the resistors R1 and R2 via the bridge diode BD1. At this time, when the voltage charged in the capacitor C7 becomes greater than the breakdown voltage of the zener diode ZD1, the zener diode ZD1 is turned on so that a current flows in the resistor R3, and a current flows in the base of the transistor Q2. ) Is ON, i.e., is conducting. The collector terminal of transistor Q2 is connected to the base of transistor Q1. When transistor Q2 is ON, the short circuit between the base and emitter of transistor Q1 causes the voltage between the emitter and base of transistor Q1 to be close to 0V, whereby transistor Q1 is turned off. (OFF).

On the contrary, when the power is turned off, the voltage charged in the capacitor C7 becomes lower than the breakdown voltage of the zener diode ZD1, and the zener diode ZD1 is turned off, so that no current flows in the resistor R3. Since no current flows through the base of Q2, the transistor Q2 is turned off, that is, turned off, and the resistor R6 is applied between the base and the emitter of the transistor Q1. Then, the voltages charged to the capacitors C2 and C3 are divided by the resistors R5 and R51 and the transistor Q1 by a value obtained by dividing the voltage across the LED by the frequency provided to the LED (LED V / F), and the transistor Q1 is turned on. (ON), and the current flows to discharge the voltage equal to the voltage of both the zener diode ZD2 plus the voltage VBE between the base and emitter of the transistor Q1. As a result, control is made to discharge the voltage charged in the capacitors C2 and C3.

When the power is turned on again, the capacitors C2 and C3 are partially charged, thereby eliminating the delay caused by the charging of the capacitors C2 and C3, thereby facilitating quick lighting upon re-lighting.

In the fourth embodiment, when there is no forced voltage control circuit, when the LED lamp 170 is turned off, a residual image remaining dimly lit for a long time by the voltage charged in the capacitor remains. By controlling the, it is possible to remove the afterimage quickly and to easily turn on the lighting.

FIG. 8 is an overall configuration diagram of an LED lamp driving control apparatus including the LED voltage control circuit for sensing the input voltage of FIG. 6. That is, FIG. 8 shows the overall circuit diagram of the LED lamp driving control apparatus including the LED voltage control circuit when the rectifying power supply and the LED driving unit are isolated (insulated) using the photocoupler.

The LED lamp driving control apparatus of FIG. 8 includes the commercial power input unit of FIG. 4 and the LED driving unit 200 of FIG. 6. The LED lamp driving control apparatus of FIG. 8 is the same as that of FIG. 5 except that the LED driving unit 200 of FIG. 6 is provided. That is, the commercial power input unit 50, the rectifier 110, the PWM switching unit 400 is the same as that of FIG.

In FIG. 8, A, B, and C represent points connected to each other.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Therefore, the spirit of the present invention should be grasped only by the claims set out below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

50: commercial power input unit 100: rectified power supply
110: rectifying unit 110 150: ripple removing unit
170: LED lamp 200: LED driver

Claims (17)

In the LED lamp drive control device using the ripple removing unit, in order to prevent the LED lamp from being lit by the charging voltage of the capacitor when the LED lamp is turned off,
The first resistor and the seventh capacitor are connected in series between the output terminal of the rectifying unit rectifying the voltage received from the commercial power input unit,
One end of the third resistor and the first zener diode connected in series is connected to the intermediate point of the first resistor and the seventh capacitor, and the other end of the third resistor and the first zener diode connected in series is one input terminal of the photocoupler. Connected to,
One end of the LED lamp is connected to one end of the fourth resistor and the second zener diode connected in series, and one output terminal of the photocoupler is connected to the other end of the fourth resistor and the second zener diode connected in series. The output terminal is connected to the operating power terminal of the ripple removing unit,
The output end of the ripple removing part is connected to the other end of the LED lamp,
One end of the LED lamp is connected to the + end of the third capacitor, the-end of the third capacitor is connected to the ground of the ripple removing unit,
One end of the first inductor is mounted to the + end of the third capacitor, one end of the second inductor is mounted to the-end of the third capacitor,
The second capacitor is mounted between the other end of the first inductor and the other end of the second inductor,
When the power switch of the LED lamp driving control device is turned ON and the voltage charged in the seventh capacitor becomes larger than the breakdown voltage of the first zener diode, power is applied to the operating power terminal of the ripple removing unit so that the ripple removing unit LED lamp drive control device using a ripple removing unit, characterized in that the drive. In the LED lamp drive control device using the ripple removing unit, in order to prevent the LED lamp from being lit by the charging voltage of the capacitor when the LED lamp is turned off,
The first resistor and the seventh capacitor are connected in series between the output terminal of the rectifying unit rectifying the voltage received from the commercial power input unit,
A third resistor connected in series and one end of the first zener diode are connected to the intermediate point of the first resistor and the seventh capacitor, and the third resistor connected in series and the other end of the first zener diode are connected to the base of the second npn transistor. The second npn transistor is connected to the base of the first ppn transistor, and the emitter of the second npn transistor is connected to ground.
One end of the LED lamp is connected to one end of the fourth resistor and the second zener diode connected in series, and the emitter of the first ppn transistor is connected to the other end of the fourth resistor and the second zener diode connected in series and the first ppn transistor is connected. Collector is connected to the operating power terminal of the ripple removing unit,
The output end of the ripple removing part is connected to the other end of the LED lamp,
One end of the LED lamp is connected to the + end of the third capacitor, the-end of the third capacitor is connected to the ground of the ripple removing unit,
One end of the first inductor is mounted to the + end of the third capacitor, one end of the second inductor is mounted to the-end of the third capacitor,
The second capacitor is mounted between the other end of the first inductor and the other end of the second inductor,
When the power switch of the LED lamp driving control device is turned ON and the voltage charged in the seventh capacitor becomes larger than the breakdown voltage of the first zener diode, power is applied to the operating power terminal of the ripple removing unit so that the ripple removing unit LED lamp drive control device using a ripple removing unit, characterized in that the drive. delete The method according to claim 1 or 2,
When the power switch of the LED lamp driving control device is turned OFF and the voltage charged in the seventh capacitor becomes lower than the breakdown voltage of the first zener diode, the ripple removing unit is configured to stop. LED lamp drive control device using the removal unit. The method according to claim 1 or 2,
And a twelfth resistor is further connected between the third resistor connected in series and the other end of the first zener diode and the ground. delete delete delete The commercial power input unit of claim 1, wherein the commercial power input unit includes:
The varistor and the commercial power input capacitor are mounted in parallel between the L-side connection terminal and the N-side connection terminal in contact with the socket, and both ends of the commercial power input capacitor are mounted with inductors, respectively, and the inductor is connected with the rectifier. LED lamp drive control device using a ripple removing unit. In the LED lamp drive control device having an LED voltage control circuit for detecting the input voltage, in order to prevent the LED lamp from being lit by the charging voltage of the capacitor when the LED lamp is turned off,
In the output terminal of the rectifying unit rectifying the voltage received from the commercial power input unit, the first resistor and the seventh capacitor are connected in series,
One end of the third resistor and the first zener diode connected in series is connected to the intermediate point of the first resistor and the seventh capacitor, and the other end of the third resistor and the first zener diode connected in series is one input terminal of the photocoupler. Connected to,
One output terminal of the photocoupler is connected to the base of the first transistor, one end of the fifth resistor is connected to the collector of the first transistor, and one end of the second zener diode and the fourth resistor connected in series to the other end of the fifth resistor. The other one end of the second zener diode and the fourth resistor connected in series is connected to the base of the first transistor, and the sixth resistor is connected between the base and the emitter of the first transistor.
A second capacitor is mounted between the other end of the fifth resistor and the emitter of the first transistor.
The + end of the second capacitor is connected to one end of the first inductor, the-end of the second capacitor is connected to one end of the second inductor,
A third capacitor is connected between the other end of the first inductor and the other end of the second inductor, and the LED lamp is connected between the + end of the third capacitor and the-end of the third capacitor, LED lamp drive control device having an LED voltage control circuit for sensing the input voltage. In the LED lamp drive control device having an LED voltage control circuit for detecting the input voltage, in order to prevent the LED lamp from being lit by the charging voltage of the capacitor when the LED lamp is turned off,
In the output terminal of the rectifying unit rectifying the voltage received from the commercial power input unit, the first resistor and the seventh capacitor are connected in series,
The third resistor connected in series and one end of the first zener diode are connected to the intermediate point of the first resistor and the seventh capacitor, and the third resistor connected in series and the other end of the first zener diode are connected to the base of the second transistor. Is connected to the base of the first transistor, the emitter of the second transistor is connected to ground,
One end of the fifth resistor is connected to the collector of the first transistor, and the second zener diode and one end of the fourth resistor connected in series are connected to the other end of the fifth resistor, and the second zener diode and the fourth resistor connected in series are connected. The other end of the first transistor is connected to the base of the first transistor, a sixth resistor is connected between the base and the emitter of the first transistor,
A second capacitor is mounted between the other end of the fifth resistor and the emitter of the first transistor.
The + end of the second capacitor is connected to one end of the first inductor, the-end of the second capacitor is connected to one end of the second inductor,
A third capacitor is connected between the other end of the first inductor and the other end of the second inductor, and the LED lamp is connected between the + end of the third capacitor and the-end of the third capacitor, LED lamp drive control device having an LED voltage control circuit for sensing the input voltage. delete The method according to any one of claims 10 or 11,
The fifth resistor is an LED lamp drive control device having an LED voltage control circuit for detecting the input voltage, characterized in that the two resistors in parallel. The method according to any one of claims 10 or 11,
And a twelfth resistor is further connected between the third resistor connected in series and the other side of the first zener diode and the ground, wherein the LED lamp driving control device having the LED voltage control circuit for input voltage sensing. The method according to any one of claims 10 or 11,
When the power switch of the LED lamp driving control device is turned OFF and the voltage charged in the seventh capacitor becomes lower than the breakdown voltage of the first zener diode, the voltages at both ends of the second zener diode and the base and the emitter of the first transistor are reduced. An LED lamp driving control device having an LED voltage control circuit for sensing the input voltage, characterized in that the discharge is made by the voltage of the inter-voltage voltage. The method according to any one of claims 10 or 11,
LED lamp driving control device having an LED voltage control circuit for detecting the input voltage, characterized in that the LED lamp is mounted in parallel with the second capacitor. The method according to claim 10 or 11, wherein the commercial power input unit,
The varistor and the commercial power input capacitor are mounted in parallel between the L-side connection terminal and the N-side connection terminal in contact with the socket, and both ends of the commercial power input capacitor are mounted with inductors, and the inductors are connected with the rectifier. An LED lamp drive control device having an LED voltage control circuit for sensing the input voltage.

Images