KR102286777B1 - Led lighting apparatus - Google Patents

Abstract

The present invention discloses a light emitting diode lighting device, which is connected to a node between a power supply unit and a lighting unit so that a rectified voltage is applied, and when the rectified voltage is less than a first level, a channel unit provides a discharge path to the node so that the dimmer extinguishes the lighting unit In the controlled state, weak lighting of the lighting unit due to the holding current of the dimmer can be prevented.

Description

Light emitting diode lighting device {LED LIGHTING APPARATUS}

The present invention relates to a light emitting diode illuminating device, and more particularly, to a light emitting diode illuminating device that improves weak lighting caused by current when a rectified voltage is controlled to be turned off.

A lighting device has been developed to use a light source having high luminous efficiency with a small amount of energy in order to save energy. A representative light source used in the lighting device may be a light emitting diode (LED).

Light emitting diodes have advantages that differentiate them from other light sources in various factors such as energy consumption, lifetime, and light quality. The light emitting diode has a characteristic of being driven by an electric current. Therefore, a lighting device using a light emitting diode as a light source has a problem in that a lot of additional circuits for driving current are required.

In order to solve the above problems, lighting devices have been developed to provide AC power to light emitting diodes in an AC direct type (AC DIRECT TYPE). A lighting device using an AC direct method converts an AC voltage into a rectified voltage and a light emitting diode emits light by driving a current using the rectified voltage. The rectified voltage means a voltage obtained by full-wave rectification of an AC voltage. The lighting device according to the AC direct method has a good power factor because it uses a rectified voltage without using an inductor and a capacitor. As described above, a lighting device using a light emitting diode and operated by an AC direct method is defined as a light emitting diode lighting device.

The light emitting diode lighting device may employ a dimmer to have a dimming function. The dimmer has a configuration that determines the position at which the phase of the alternating voltage is triggered in response to a change in the charging voltage therein. That is, the dimmer may output a phase-controlled AC voltage, the light emitting diode lighting device generates a rectified voltage using the phase-controlled AC voltage, and the light source including the light emitting diode receives the phase-controlled rectified voltage. light in response.

By controlling the phase angle of the dimmer, the brightness of the light source may be adjusted in a range in which the rectified voltage changes from the dimming-off level for extinction to the maximum value.

In general, a dimmer requires a holding current for stable operation in response to a rectified voltage equal to or less than a dimming off level.

However, when the rectified voltage applied to the light source by the dimmer is controlled to be less than or equal to the dimming off level for quenching, the holding current of the dimmer may flow through some light emitting diodes of the light source.

Even though the rectified voltage is controlled to be below the level for extinction of the light source, if the holding current flows through some light emitting diodes as described above, the light source may be turned on at an undesirably weak level.

The phenomenon in which some light emitting diodes of the light source are weakly lit by the holding current of the dimmer as described above reduces the reliability of the light emitting diode lighting device.

An object of the present invention is to prevent a phenomenon in which some light emitting diodes are weakly lit by the holding current by blocking the holding current flowing to the light emitting diode in a state where the rectified voltage is controlled to extinguish the lighting unit by the dimmer.

A light emitting diode lighting device of the present invention for solving the above technical problem, a power supply unit for providing a rectified voltage obtained by rectifying an AC voltage whose phase is controlled by a dimmer; a lighting unit including a plurality of light emitting diode groups that emit light when the rectified voltage equal to or higher than a first level is applied from the power source; a channel unit connected to a node between the power supply unit and the lighting unit to apply the rectified voltage, and providing a discharge path to the node when the rectified voltage is less than the first level; a driver in which channels respectively connected to the discharge path and the plurality of light emitting diode groups of the channel unit are formed, and a current path for a driving current is formed in one of the channels by comparing a sensing voltage and an internal reference voltage; and a sensing resistor configured to provide a sensing voltage while receiving the driving current output from the current path of the driver, wherein the holding current is formed to drive the dimmer in response to the rectified voltage equal to or less than the first level It is characterized in that the flow to the lighting unit is blocked by the provision of the discharge path of the channel unit.

In addition, the light emitting diode lighting device of the present invention, the dimmer for controlling the phase with respect to the AC voltage; a rectifier circuit for providing a rectified voltage for the phase-controlled AC voltage in the dimmer; a lighting unit including a plurality of light emitting diode groups that emit light when the rectified voltage equal to or greater than a first level is applied; a channel unit connected to a node between the power supply unit and the lighting unit to apply the rectified voltage, and providing a discharge path to the node when the rectified voltage is less than the first level; and channels respectively connected to the discharge path and the plurality of light emitting diode groups of the channel unit, forming a current path for a driving current with respect to the channels, and a sensing voltage by the driving current and an internal reference voltage and a driver for forming the current path in one of the channels by comparing , and a holding current formed for driving the dimmer in response to the rectified voltage equal to or less than the first level passes through the rectifier circuit. It is characterized in that the flow to the lighting unit is blocked by providing the discharge path of the channel unit.

According to the present invention, when the rectified voltage is controlled to be less than the level at which the lighting unit is extinguished, the holding current of the dimmer may be discharged through the discharge path of the channel unit.

That is, when the rectified voltage is controlled to be less than the level at which the lighting unit is extinguished, the holding current of the dimmer may bypass the lighting unit and be discharged.

According to the present invention, it is possible to prevent the holding current from flowing in the lighting part by the action of the channel part, and it is possible to prevent the reliability of the LED lighting device from being deteriorated because some light emitting diodes of the lighting part are weakly turned on.

1 is a circuit diagram showing a preferred embodiment of a light emitting diode lighting device of the present invention.
Fig. 2 is a detailed circuit diagram of the driver of Fig. 1;
Fig. 3 is a waveform diagram for explaining the operation of the embodiment of Fig. 1;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The terms used in the present specification and claims are not limited to a conventional or dictionary meaning, and should be interpreted in a meaning and concept consistent with the technical matters of the present invention.

The configuration shown in the embodiments and drawings described in this specification is a preferred embodiment of the present invention, and does not represent all of the technical spirit of the present invention, so various equivalents and modifications that can be substituted for them at the time of the present application are provided. there may be

An embodiment of the present invention may use a light source having semiconductor light emitting characteristics that converts electrical energy into light energy for illumination, and the light source having semiconductor light emitting characteristics may include a light emitting diode.

And, an embodiment of the present invention is disclosed in an AC direct method. The AC direct method means that the light emitting diode emits light using a rectified voltage converted from AC power. Here, the rectified voltage has a waveform obtained by full-wave rectification of an AC voltage having a sinusoidal waveform as described above. That is, the rectified voltage has a characteristic of having a ripple component in which the voltage level rises and falls in units of a half cycle of the commercial AC voltage.

For the description of the embodiment of the present invention, the current provided to the light emitting diode in response to the rectified voltage converted from the AC power is referred to as a driving current.

1 includes a power supply unit 100 , a lighting unit 200 , a driver 300 , a sensing resistor Rs, and a channel unit 400 .

The power supply unit 100 rectifies the AC voltage of the AC power and outputs the rectified voltage Vrec. The power supply unit 100 rectifies an AC power supply Vs providing an AC voltage, a dimmer 14 controlling a phase angle of the AC voltage, and an AC voltage having a phase angle controlled by the dimmer 14 to obtain a rectified voltage Vrec. It may include a rectifying circuit 12 for outputting.

Here, the AC power source Vs may be a commercial power source.

The dimmer 14 has a configuration for controlling the phase angle of the AC voltage by determining a position at which the phase of the AC voltage is triggered in response to a change in the charging voltage therein. That is, the dimmer 14 outputs an AC voltage whose phase is controlled.

The rectifier circuit 12 outputs a rectified voltage Vrec obtained by full-wave rectification of the AC voltage whose phase angle is controlled by the dimmer 14 . In the embodiment of the present invention, the rise or fall of the rectified voltage Vrec may be understood to mean the rise or fall of the ripple component of the rectified voltage Vrec. The current output from the rectifier circuit 12 in response to the rise or fall of the rectified voltage Vrec corresponds to the above-described driving current Irec.

The lighting unit 200 includes a plurality of light emitting diode groups LED1 , LED2 , and LED3 including series-connected light emitting diodes, and is configured to emit light by a rectified voltage Vrec.

A capacitor CAP connected to the ground is configured at a node between the rectifier circuit 12 and the lighting unit 200 .

The lighting unit 200 sequentially emits and extinguishes light for each light emitting diode group by the increase or decrease of the rectified voltage Vrec provided from the power supply unit 100 .

The lighting unit 200 of FIG. 1 exemplifies that the light emitting diode groups LED1, LED2, and LED3 are connected in series. Each light emitting diode group LED1 , LED2 , LED3 may include one or more light emitting diodes. Among the light emitting diode groups LED1 , LED2 , and LED3 , the light emitting diode group LED1 emits light first when the rectified voltage Vrec increases.

And, in the lighting unit 200, the driving current Irec flows in one direction to the input terminals of the light emitting diode group LED1, the light emitting diode group LED2, and the light emitting diode group LED3 to prevent a reverse current from occurring. Diodes Din, D1, and D2 for each are configured.

The channel unit 400 is connected to the node between the power supply unit 100 and the lighting unit 200 so that the rectified voltage Vrec is applied, and when the rectified voltage Vrec is less than the first level, it is configured to provide a discharge path to the node. . Here, the first level may be understood as a voltage level at which at least one of the light emitting diode groups LED1, LED2, and LED3 of the lighting unit 200 emits light, and in the embodiment of FIG. 1 , the light emitting diode group LED1 is It can be defined as a level that emits light.

More specifically, the Zener diode ZD is connected between the node between the power supply unit 100 and the lighting unit 200 and the channel C1 of the driver 300 to be described later, maintains a normal turn-on state, and the rectified voltage Vrec) Even when the voltage rises, the voltage at both ends acts as a constant voltage source that maintains a preset second level. Here, the second level may be determined at 60 percent or less of the first level.

With the above configuration, the channel unit 400 provides a discharge path for the holding current of the dimmer 14 corresponding to the rectified voltage Vrec of the second level or lower than the first level, and the second level or higher and A discharge path for the driving current Irec corresponding to the rectified voltage Vrec less than the first level is provided.

The driver 300 includes channels C1 to C4 respectively connected to a discharge path of the channel unit 400 and a plurality of light emitting diode groups (LED1 , LED2, LED3) of the lighting unit 200 , and a sensing voltage and an internal It is configured to form a current path for the driving current Irec by the rectified voltage Vrec in one of the channels C1 to C4 by comparing the reference voltages. More specifically, a Zener diode ZD defining the second level is connected to the channel unit 400 to the channel C1, and the light emitting diode groups LED1 and LED2 of the lighting unit 200 are connected to the channels C2 to C4. , the output terminal of LED3) is connected.

The driver 300 includes channels C1 to C4 respectively connected to the discharge path of the channel unit 400 and output terminals of the light emitting diode groups LED1 to LED3, a ground terminal GND for connection to the ground, and a sensing resistor. (Rs) has a connected sensing terminal (Ri). The driver 300 controls a change in a current path between the channels C1 to C4 and the sensing terminal Ri.

The sensing resistor Rs is connected to the sensing terminal Ri of the driver 300 to which the driving current Irec is output, and provides a sensing voltage corresponding to the driving current Irec.

The configuration of the driver 300 among the components of FIG. 1 will be described in more detail with reference to FIG. 2 .

The driver 300 provides a discharge path of the channel unit 400 and a current path for the output terminals of each light emitting diode group (LED12 to LED4), and regulates the driving current Irec flowing from the current path to the sensing resistor Rs. do.

The light emitting diode groups LED1 , LED2 , and LED2 connected in series in the lighting unit 200 sequentially emit or extinguish light in response to a change in the rectified voltage Vrec.

When the rectified voltage Vrec rises and sequentially reaches the light emitting voltage of each of the light emitting diode groups LED1, LED2, and LED3, the driver 300 controls the discharge path of the channel unit 400 or each light emitting diode group LED1, LED2 , provides a current path to the output terminal of LED3) sequentially.

Here, the light emitting voltage V4 for emitting light from the light emitting diode group LED3 is defined as a voltage for emitting light from all of the light emitting diode groups LED1 , LED2 , and LED3 . The light emitting voltage V3 for emitting light from the light emitting diode group LED2 is defined as a voltage for emitting light from all of the light emitting diode groups LED1 and LED2 . The light emitting voltage V2 for emitting light from the light emitting diode group LED1 is defined as a voltage for emitting light from the light emitting diode group LED2 . The emission voltage V2 may be understood as the above-described first level. In addition, the second level, which is the constant voltage formed by the channel unit 400 , is defined as the voltage V1 .

As shown in FIG. 2 , the driver 300 includes switching circuits 31 to 34 providing current paths for the channels C1 to C4 and a reference voltage supply unit 20 for providing reference voltages VREF1 to VREF4. includes

The reference voltage supply unit 20 may be implemented by providing reference voltages VREF1 to VREF4 of various different levels according to the intention of the manufacturer.

For example, the reference voltage supply unit 20 includes a plurality of series-connected resistors to which the constant voltage VDD is applied, and may be configured to output reference voltages VREF1 to VREF4 of different levels for each node between the resistors. Unlike the above configuration, the reference voltage supply unit 20 may be configured to include independent voltage supply sources that respectively provide reference voltages VREF1 to VREF4 of different levels. In addition, the reference voltage supply unit 20 shares a ground with the sensing resistor Rs and is connected to the ground terminal GND for this purpose.

In reference voltages VREF1 to VREF4 of different levels, the reference voltage VREF1 has the lowest voltage level, the reference voltage VREF4 has the highest voltage level, and in the order of the reference voltages VREF1, VREF2, VREF3, and VREF4, the reference voltages gradually increase to higher levels. can be set to have

Here, the reference voltage VREF1 has a level for turning off the switching circuit 31 when the light emitting diode group LED1 emits light. More specifically, the reference voltage VREF1 may be set to a level lower than a sensing voltage formed in response to light emission of the light emitting diode group LED1 .

In addition, the reference voltage VREF2 has a level for turning off the switching circuit 32 when the light emitting diode group LED2 emits light. More specifically, the reference voltage VREF2 may be set to a level lower than a sensing voltage formed in response to light emission of the light emitting diode group LED2 .

In addition, the reference voltage VREF3 has a level for turning off the switching circuit 33 when the light emitting diode group LED3 emits light. More specifically, the reference voltage VREF3 may be set to a level lower than a sensing voltage formed in response to light emission of the light emitting diode group LED3 .

In addition, the level of the reference voltage VREF4 is preferably set to be regulated even in the region of the upper limit level of the rectified voltage Vrec.

Meanwhile, the switching circuits 31 to 34 are commonly connected to the sensing resistor Rs through the sensing terminal Ri for current regulation and current path formation.

The switching circuits 31 to 34 compare the sensing voltage of the sensing resistor Rs with the respective reference voltages VREF1 to VREF4 of the reference voltage generating circuit 20 to form current paths for the channels C1 to C4. do.

Each of the switching circuits 31 to 34 includes a comparator 50 and a switching element, and the switching element is preferably composed of an NMOS transistor 52 .

The comparator 50 of each switching circuit 31 to 34 applies a reference voltage to a positive input terminal (+), a sensing voltage is applied to a negative input terminal (-), and compares the reference voltage with the sensing voltage as an output terminal. print out

In addition, the NMOS transistor 52 of each of the switching circuits 31 to 34 performs a switching operation for controlling the flow of the driving current Irec according to the output of each comparator 50 applied to the gate.

The operation of the embodiment of the present invention may be described with reference to FIG. 3 . FIG. 3 shows a waveform of the driving current Irec corresponding to the rectified voltage Vrec whose phase angle is controlled to have a full angle by the dimmer 14 .

In the description of the embodiment, the driving current Irec means a current corresponding to the rectified voltage Vrec of the second level or higher, and the holding current is a dimmer ( 14) means the current discharged to maintain the stable operation.

When the dimmer 14 controls the phase angle of the rectified voltage Vrec to the dimming-off level to extinguish the lighting unit 200, the rectified voltage Vrec is at a level less than the light emitting voltage V2 of the light emitting diode group LED1. may be maintained, or a voltage V1 or less, which is a constant voltage formed by the Zener diode ZD of the channel unit 400 , may be maintained.

The case in which the rectified voltage Vrec is in the initial state may be defined as a case in which the rectified voltage Vrec is less than the second level, that is, the voltage V1.

As described above, the initial state of the rectified voltage Vrec is included when the phase angle of the rectified voltage Vrec is controlled to the dimming-off level by the dimmer 14 , and a holding current for stable operation of the dimmer 14 . It can be understood as a case where the discharge of

When the rectified voltage Vrec is in an initial state, the reference voltages VREF1 to VREF4 are higher than the sensing resistance of the sensing resistor Rs. Therefore, the NMOS transistor 52 of each of the switching circuits 31 to 34 of the voltage driver 300 remains turned on.

Therefore, in response to the rectified voltage Vrec in the initial state, the holding current for the stable operation of the dimmer 14 is the discharge path of the channel unit 400, the current path through the channel C1 of the driver 300, and sensing. It is discharged through the resistor Rs.

Thereafter, when the rectified voltage Vrec rises to reach the first level voltage V1 , the first level voltage V1 , that is, the constant voltage is applied to both ends of the channel unit 400 .

At this time, the light emitting diode groups LED1 , LED2 , and LED3 maintain the extinction state, and the driving current corresponding to the rectified voltage Vrec is the discharge path of the channel unit 400 and the channel C1 of the driver 300 . through the current path and through the sensing resistor (Rs).

At this time, since the level of the sensing voltage is low, the turn-on state of the switching circuits 31 to 34 is not changed.

Then, while the rectified voltage Vrec reaches the emission voltage V2 , the driving current Irec is regulated to maintain a constant amount by the operation of the switching circuit 31 .

When the rectified voltage Vrec reaches the light emitting voltage V2, the light emitting diode group LED1 emits light. Then, when the light emitting diode group LED1 emits light, the switching circuit 32 connected to the light emitting diode group LED12 through the channel C2 provides a current path.

When the light emitting diode group LED1 emits light, the driving current Irec starts to flow in the rectification path by the switching circuit 32 , and the level of the sensing voltage at this time is higher than the reference voltage VREF1 . Therefore, the NMOS transistor 52 of the switching circuit 31 is turned off by the output of the comparator 50 . That is, the switching circuit 31 is turned off, and the switching circuit 32 provides a current path corresponding to light emission of the light emitting diode group LED1 .

After that, while the rectified voltage Vrec reaches the emission voltage V3 , the driving current Irec is regulated to maintain a constant amount by the operation of the switching circuit 32 .

When the rectified voltage Vrec reaches the light-emitting voltage V3, the light-emitting diode group LED2 emits light. When the light emitting diode group LED3 emits light, the switching circuit 33 connected to the light emitting diode group LED2 provides a current path. At this time, the light emitting diode groups LED1 also maintain a light emitting state.

When the light emitting diode group LED2 emits light, the driving current Irec starts flowing in the rectification path by the switching circuit 33 , and the level of the sensing voltage at this time is higher than the reference voltage VREF2 . Therefore, the NMOS transistor 52 of the switching circuit 32 is turned off by the output of the comparator 50 . That is, the switching circuit 32 is turned off, and the switching circuit 33 provides a current path corresponding to light emission of the light emitting diode group LED2 .

Then, while the rectified voltage Vrec reaches the emission voltage V4 , the driving current Irec is regulated to maintain a constant amount by the operation of the switching circuit 33 .

When the rectified voltage Vrec reaches the light emitting voltage V4, the light emitting diode group LED3 emits light. When the light emitting diode group LED3 emits light, the switching circuit 34 connected to the light emitting diode group LED3 provides a current path. At this time, the light emitting diode groups LED1 and LED2 also maintain a light emitting state.

When the light emitting diode group LED3 emits light, the driving current Irec starts to flow in the current path by the switching circuit 34 , and the level of the sensing voltage at this time is higher than the reference voltage VREF3 . Therefore, the NMOS transistor 52 of the switching circuit 33 is turned off by the output of the comparator 50 . That is, the switching circuit 33 is turned off, and the switching circuit 34 provides a current path corresponding to light emission of the light emitting diode group LED3 .

After that, the rectified voltage Vrec rises to the upper limit level and then starts to fall.

While the rectified voltage Vrec reaches the upper limit level, the driving current Irec is regulated to maintain a constant amount by the operation of the switching circuit 34 .

Conversely, when the rectified voltage Vrec is gradually decreased from the upper limit level to the emission voltages V4, V3, V2, and the voltage V1 or less, the LED groups LED3, LDD2, and LED1 are sequentially extinguished. In addition, the driving current Irec is also gradually reduced in response to the extinction of the light emitting diode groups LED4 , LDD3 , and LED12 .

As described above, the driver 300 may change and provide a current path in response to a change in the light emitting state of the light emitting diode groups LED1 , LED2 , and LED3 .

In the embodiment of the present invention, the light emitting diode group LED1 in the lighting unit 200 first emits light in response to the rise of the rectified voltage Vrec.

When the rectified voltage Vrec is less than or equal to a level at which the light emitting diode group LED11 can emit light, a holding current for stable operation of the dimmer 14 or a driving current Irec by the rectified voltage Vrec is applied to the channel unit 400 ), a current path through the channel C1 of the driver 300, and the sensing resistor Rs.

Therefore, before light emission of the first light-emitting diode group LED1 , that is, when the rectified voltage Vrec is less than the level at which the lighting unit 200 is extinguished, the embodiment of the present invention includes the light-emitting diode groups LED1, LED2, and LED3. It is possible to prevent the reliability of the light emitting diode lighting device from being deteriorated because a current flows through a portion of the light emitting diode 200 so that the lighting unit 200 is weakly lit.

Claims (11)

a power supply unit providing a rectified voltage obtained by rectifying an AC voltage whose phase is controlled by a dimmer;
a lighting unit including a plurality of light emitting diode groups that sequentially emit light when the rectified voltage equal to or higher than a first level is applied from the power source;
a channel unit connected to a node between the power supply unit and the lighting unit to apply the rectified voltage, and providing a discharge path to the node when the rectified voltage is less than the first level;
Channels respectively connected to the discharge path and the plurality of light emitting diode groups of the channel unit are formed, and a current path for a driving current for one of the channels by comparing a sensing voltage and preset internal reference voltages for each channel driver to form; and
a sensing resistor connected to the current path of the driver and providing a sensing voltage corresponding to the driving current output from the current path;
The first level is a voltage level at which at least one of the plurality of light emitting diode groups of the lighting unit emits light,
A holding current formed for driving the dimmer in response to the rectified voltage below the first level flows to the plurality of light emitting diode groups of the lighting unit to provide the discharge path of the channel unit and the current path of the driver Light emitting diode lighting device, characterized in that blocked by. According to claim 1,
The channel unit includes a constant voltage source. 3. The method of claim 2,
The constant voltage source is a light emitting diode lighting device including a Zener diode. According to claim 1,
The channel portion is a light emitting diode lighting device that acts as a constant voltage source for the rectified voltage equal to or greater than a second level determined to be less than the first level and 60 percent or less of the first level. According to claim 1,
The channel portion is the discharge path for the holding current corresponding to the rectified voltage of a second level lower than the first level and the driving current corresponding to the rectified voltage above the second level and less than the first level A light emitting diode lighting device that provides According to claim 1,
The driver is configured to maintain a normal turn-on state for the channels, and regulates the driving current flowing through the current path by comparing the sensing voltage with the reference voltage. According to claim 1,
The driver regulates the driving current input through the discharge path of the channel unit by comparing the sensing voltage with the reference voltage. a dimmer to control the phase for alternating voltage;
a rectifying circuit for providing a rectified voltage for the phase-controlled AC voltage in the dimmer;
a lighting unit including a plurality of light emitting diode groups that sequentially emit light when the rectified voltage of a first level or higher is applied;
a channel unit connected to a node between the rectifying circuit and the lighting unit to apply the rectified voltage, and providing a discharge path to the node when the rectified voltage is less than the first level; and
Channels respectively connected to the discharge path and the plurality of light emitting diode groups of the channel part are formed, a current path for a driving current is formed for the channel, and a sensing voltage by the driving current and an internal preset for each channel a driver for forming the current path with respect to one of the channels by comparing the reference voltages of
The first level is a voltage level at which at least one of the plurality of light emitting diode groups of the lighting unit emits light,
A holding current formed for driving the dimmer in response to the rectified voltage equal to or less than the first level flows to the plurality of light emitting diode groups of the lighting unit through the rectifier circuit, the discharge path of the channel unit and the driver A light emitting diode lighting device, characterized in that it is blocked by providing the current path. 9. The method of claim 8,
The channel portion is a light emitting diode lighting device that acts as a constant voltage source for the rectified voltage equal to or greater than a second level determined to be less than the first level and 60 percent or less of the first level. 9. The method of claim 8,
The channel portion is the discharge path for the holding current corresponding to the rectified voltage of a second level lower than the first level and the driving current corresponding to the rectified voltage above the second level and less than the first level A light emitting diode lighting device that provides 9. The method of claim 8,
The driver is configured to maintain a normal turn-on state for the channels, and regulates the driving current flowing through the current path by comparing the sensing voltage with the reference voltage.

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