KR102163863B1 - Control circuit for led lighting apparatus - Google Patents

Abstract

The present invention discloses a control circuit of a light emitting diode lighting device that controls the light emission of a light composed of light emitting diode channels, and the light emission of the light is controlled by a current regulation operation by a current regulating circuit, and in parallel therewith, an illuminance sensor and operation The light emission is controlled by the detection sensor. Therefore, the functionality of the LED lighting device is improved and a current reduction effect can be expected.

Description

Control circuit of light-emitting diode lighting device {CONTROL CIRCUIT FOR LED LIGHTING APPARATUS}

The present invention relates to a light-emitting diode lighting device, and more particularly, to a control circuit of a light-emitting diode lighting device that controls light emission of a lighting lamp composed of light-emitting diode channels.

Lighting technology is being developed with the trend of adopting a light emitting diode (LED) as a light source to save energy.

High-brightness light-emitting diodes have the advantage of being differentiated from other light sources in various factors such as energy consumption, lifetime, and light quality.

However, the lighting device using the light emitting diode as a light source has a problem that a lot of additional circuits are required due to the characteristic that the light emitting diode is driven by a constant current.

An example developed to solve the above problems is an AC direct type lighting device.

The AC direct type LED lighting device drives the LED by generating a rectified voltage from a commercial AC power source. The AC direct type light emitting diode lighting device has a good power factor because it directly uses a rectified voltage as an input voltage without using an inductor and a capacitor.

A lighting lamp of a light emitting diode lighting device is generally configured to be driven by connecting a large number of light emitting diodes in series.

The above-described light-emitting diode lighting device needs to be developed to have a function of controlling a light-emitting state by actively responding to the surrounding environment.

An object of the present invention is to provide a control circuit for a light emitting diode lighting apparatus having a function of emitting a lighting lamp by providing a rectified voltage by an AC direct method and controlling light emission in response to the illuminance of a location where the lighting lamp is installed.

The present invention provides a rectified voltage by an AC direct method to emit light, senses the movement of a person or animal at a location where the light is installed, and a light emitting diode lighting device having the functionality to control light emission in response to the detected result. Another purpose is to provide a control circuit for

The control circuit of the LED lighting apparatus according to the present invention is characterized in that it is configured to control light emission of a lighting lamp including a plurality of LED channels using a rectified voltage.

In addition, the control circuit of the LED lighting apparatus according to the present invention includes: a sensor unit configured to detect at least one of motion and illuminance for a predetermined area in which the lighting lamp is installed and output a sensing signal corresponding to the detection result; And a control unit for providing a selective current path corresponding to the emission state of the LED channels by using reference voltages allocated for each LED channel, and controlling the emission of the lamp in response to the sensing signal. It is characterized.

Accordingly, according to the present invention, a function capable of controlling light emission by detecting the illumination of a location where a lighting lamp is installed or the movement of a person or animal can be provided, and thus a function suitable for use in places such as street lights or corridors can be provided. There is an effect.

1 is a circuit diagram showing a preferred embodiment of a control circuit of a light emitting diode lighting apparatus according to the present invention.
Fig. 2 is a graph for explaining the operation of the embodiment of Fig. 1;
3 is a circuit diagram illustrating the switching circuit of FIG. 1.
4 is a circuit diagram illustrating receivers of the lighting control unit of FIG. 1.
5 is a circuit diagram showing another embodiment according to the present invention.

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

Since the embodiments described in the present specification and the configurations shown in the drawings are preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, various equivalents and modifications that can replace them at the time of the present application are There may be.

The embodiment of FIG. 1 has a function of regulating current for light emission of the lamp 10, and has a function of controlling light emission in response to the illumination at a location where the lamp 10 is installed or motion of an object.

Referring to FIG. 1, an embodiment according to the present invention includes a lighting lamp 10, a power supply unit providing a rectified voltage converted from commercial power to the lamp 10, and a control unit providing a current path for light emission of the lamp 10. Include.

The lamp 10 includes light-emitting diodes connected in series, and the light-emitting diodes are divided into four light-emitting diode channels CH1, CH2, CH3, and CH4.

In FIG. 1, the lamp 10 includes four LED channels CH1, CH2, CH3, and CH4 connected in series, and the number of the plurality of LED channels may be changed according to the intention of the manufacturer. In addition, each of the LED channels CH1, CH2, CH3, and CH4 may include a plurality of LEDs, and for convenience of description, one diode symbol is used in the drawings. The four light-emitting diode channels CH1, CH2, CH3, and CH4 sequentially emit light for each channel by a ripple component of the rectified voltage provided from the power supply unit.

The power supply unit has a configuration that outputs a rectified voltage by rectifying an external AC voltage.

The power supply unit may include an AC power source VAC having an AC voltage and a rectifier circuit 12 that rectifies a current generated by the AC power source VAC and outputs a rectified voltage. Here, the AC power supply VAC may be a commercial power supply.

Then, the rectifier circuit 12 outputs a rectified voltage obtained by full-wave rectification of an AC voltage having a sinusoidal waveform of an AC power supply VAC. Accordingly, the rectified voltage has a characteristic of having a ripple component in which the voltage level rises and falls in units of half a period of the AC voltage.

The control unit includes a current regulating circuit, a lighting control unit 40 and a switching circuit 60. Here, the current regulating circuit performs a current regulation operation for light emission of each LED channel (CH1, CH2, CH3, CH4), and the reference voltage providing unit 20 and the four switching circuits 30, 32, 34 , 36).

The control unit may be implemented as a single chip and is configured to provide a current path through an external current detection unit including a current detection resistor Rs whose one end is grounded. The voltage formed in the current detection resistor Rs is referred to as a sensing voltage. The sensing voltage may be varied by the amount of current in the current path that varies according to the light emission state of the lighting lamp 10. In this case, the current flowing through the current detection resistor Rs may be a constant current.

According to the above-described configuration, the embodiment according to the present invention performs a current regulation operation by a current regulating circuit in response to an increase or decrease of the rectified voltage, and as a result, each of the LED channels CH1 and CH2 of the lamp 10 , CH3, CH4) are sequentially emitted or quenched. And, when the rectified voltage rises and reaches the emission voltages (V1 to V4) for each of the LED channels (CH1, CH2, CH3, CH4) sequentially, the switching circuits 30, 32, 34, 36 turn each LED channel ( A current path for light emission of CH1, CH2, CH3, CH4) is provided in sequence.

Here, the light emitting voltage V4 of the LED channel CH4 is defined as a voltage that emits light of all the LED channels CH1, CH2, CH3, and CH4, and the light emitting voltage V3 of the LED channel CH3 Is defined as the voltage that emits light of all the LED channels (CH1, CH2, CH3), and the emission voltage of the LED channel (CH2) is defined as the voltage that emits light of all the LED channels (CH1, CH2). The light emitting voltage of the diode channel CH1 is defined as a voltage that emits only the light emitting diode channel CH1.

Meanwhile, the reference voltage providing unit 20 provides reference voltages VREF1, VREF2, VREF3, and VREF4 to each of the switching circuits 30, 32, 34, and 36, and for this purpose, a plurality of series connected to which a constant voltage VREF is applied. Of the resistances (R1, R2, R3, R4, R5). Unlike this, the reference voltage providing unit 20 may be configured to include a plurality of voltage sources for providing the reference voltages VREF1, VREF2, VREF3, and VREF4.

In the reference voltage providing unit 20, the resistor R1 is connected to the ground, and a constant voltage VREF is applied to the resistor R5. Resistor R5 acts as a load resistor to adjust the output. The resistors R1, R2, R3, and R4 are for outputting reference voltages VREF1, VREF2, VREF3, and VREF4 of different levels. Among the reference voltages VREF1, VREF2, VREF3, and VREF4, the reference voltage VREF1 has the lowest voltage level, and the reference voltage VREF4 has the highest voltage level.

Each resistor (R1, R2, R3, R4) has four reference voltages VREF1, VREF2, VREF3, which have increasingly higher levels in response to fluctuations in the rectified voltage applied to the LED channels CH1, CH2, CH3, CH4, It is preferably set to output VREF4.

Here, the reference voltage VREF1 has a level for turning off the switching circuit 30 when the light emitting diode channel CH2 emits light. More specifically, the reference voltage VREF1 may be set to a level equal to or lower than the sensing voltage formed in the current detection resistor Rs by the emission voltage of the LED channel CH2.

In addition, the reference voltage VREF2 has a level for turning off the switching circuit 32 when the LED channel CH3 emits light. More specifically, the reference voltage VREF2 may be set to a level equal to or lower than the sensing voltage formed in the current detection resistor Rs by the emission voltage of the LED channel CH3.

Further, the reference voltage VREF3 has a level for turning off the switching circuit 34 when the light emitting diode channel CH4 emits light. More specifically, the reference voltage VREF3 may be set to a level equal to or lower than the sensing voltage formed in the current detection resistor Rs by the emission voltage of the LED channel CH4.

In addition, the reference voltage VREF4 is preferably set to a level higher than the sensing voltage formed in the current detection resistor Rs by the upper limit level of the rectified voltage.

The switching circuits 30, 32, 34, 36 are commonly connected to a current detection resistor Rs providing a sensing voltage.

The switching circuits 30, 32, 34, 36 are turned on by comparing the sensing voltage detected by the current detection resistor Rs and the respective reference voltages VREF1, VREF2, VREF3, and VREF4 of the reference voltage providing unit 20. And an optional current path for being turned off to emit light 10.

The switching circuits 30, 32, 34, and 36 receive a higher level of reference voltage as they are connected to the light emitting diode channels CH1, CH2, CH3, and CH4 far from the position where the rectified voltage is applied.

Each of the switching circuits 30, 32, 34, 36 includes a comparator 50 and a switching element, and the switching element is preferably composed of an NMOS transistor 52.

A reference voltage is applied to the positive input terminal (+) of the comparator 50 of each switching circuit (30, 32, 34, 36), a current detection voltage is applied to the negative input terminal (-), and the reference voltage and current are detected by the output terminal. Outputs the result of comparing voltage. Further, the NMOS transistor 52 of each of the switching circuits 30, 32, 34, 36 is turned on or off by the output of each comparator 50 applied to the gate to selectively provide a current path.

With the above-described configuration, the embodiment of FIG. 1 performs an operation for light emission of a lighting lamp. The current regulation operation and the corresponding control operation of a lighting lamp according to the embodiment will be described with reference to FIG. 2. In FIG. 2, ILED refers to a current flowing in a current path formed for light emission of the LED channels, and is preferably a constant current.

When the rectified voltage is in the initial state, the LED channels are quenched. Therefore, the current detection resistor Rs provides a low-level sensing voltage.

When the rectified voltage is in the initial state, each switching circuit 30, 32, 34, 36 is applied to the negative input terminal (-) than the reference voltages (VREF1, VREF2, VREF3, VREF4) applied to the positive input terminal (+). Since it is higher than the sensing voltage, all remain turned on.

After that, when the rectified voltage rises and reaches the light emission voltage V1, the light emitting diode channel CH1 of the lamp 10 emits light. When the LED channel CH1 of the lamp 10 emits light, the switching circuit 30 connected to the LED channel CH1 provides a current path.

As described above, when the rectified voltage reaches the emission voltage V1 and the LED channel CH1 emits light, a current path is formed through the switching circuit 30, and the level of the sensing voltage of the current detection resistor Rs increases. do. However, since the level of the sensing voltage at this time is low, the turn-on state of the switching circuits 30, 32, 34, 36 is not changed.

Thereafter, when the rectified voltage continues to rise and reaches the light emission voltage V2, the light emitting diode channel CH2 of the lamp 10 emits light. When the LED channel CH2 of the lamp 10 emits light, the switching circuit 32 connected to the LED channel CH2 provides a current path. At this time, the light emitting diode channel CH1 also maintains the light emitting state.

As described above, when the rectified voltage reaches the emission voltage V2 and the LED channel CH2 emits light, a current path is formed through the switching circuit 32, and the level of the sensing voltage of the current detection resistor Rs increases. do. 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 30 is turned off by the output of the comparator 50. That is, the switching circuit 30 is turned off, and the switching circuit 32 provides a current path corresponding to the light emission of the LED channel CH2.

Thereafter, the rectified voltage continues to rise to reach the light emission voltage V3, and the light emitting diode channel CH3 of the lamp 10 emits light. When the light emitting diode channel CH3 of the lamp 10 emits light, the switching circuit 34 connected to the light emitting diode channel CH3 provides a current path. At this time, the LED channels CH1 and CH2 also maintain the light emission state.

As described above, when the rectified voltage reaches the emission voltage V3 and the LED channel CH3 emits light, a current path is formed through the switching circuit 34, and the level of the sensing voltage of the current detection resistor Rs increases. do. 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 34 provides a current path corresponding to light emission of the light emitting diode channel CH3.

After that, the rectified voltage continues to rise to reach the light emission voltage V4, and the light emitting diode channel CH4 of the lamp 10 emits light. When the LED channel CH4 of the lamp 10 emits light, the switching circuit 36 connected to the LED channel CH4 provides a current path. At this time, the LED channels CH1, CH2, and CH3 also maintain the light emission state.

As described above, when the rectified voltage reaches the emission voltage V4 and the LED channel CH4 emits light, a current path is formed through the switching circuit 36, and the level of the sensing voltage of the current detection resistor Rs increases. do. 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 34 is turned off by the output of the comparator 50. That is, the switching circuit 34 is turned off, and the switching circuit 36 provides a selective current path corresponding to the light emission of the light emitting diode channel CH2.

Thereafter, even if the rectified voltage continues to rise, the reference voltage VREF4 provided to the switching circuit 36 has a higher level than the sensing voltage formed in the current detection resistor Rs by the upper limit level of the rectified voltage, so switching The circuit 36 remains turned on.

When the rectified voltage passes the upper limit level, it starts to fall.

When the rectified voltage falls and falls below the light emission voltage V4, the light emitting diode channel CH4 of the lamp 10 is quenched.

When the light emitting diode channel CH4 of the lamp 10 is quenched, light emission of the light emitting diode channels CH3, CH2, CH1 is maintained, and the light emitting diode channel CH3 is transmitted to the switching circuit 34 in response to the light emitting state. A current path is provided.

After that, when the rectified voltage continues to decrease and falls below the light emission voltage V3, the light emission voltage V2, and the light emission voltage V1, the light emitting diode channels CH3, CH2, CH1 of the lamp 10 are sequentially It is quenched.

When the light emitting diode channels CH3, CH2, and CH1 of the lamp 10 are sequentially quenched, a current path is sequentially provided to the switching circuits 34, 32, and 30.

As described above, the lamp 10 may be sequentially emitted and quenched by each LED channel (CH1, CH2, CH3, CH4) according to the rectified voltage, and a current path for light emission is selectively provided by the current regulation operation. do.

On the other hand, an embodiment according to the present invention includes the lighting control unit 40 and the switching circuit 60 as described above. The lighting control unit 40 may be connected to the illuminance sensor 50 and the motion detection sensor 52, the illuminance sensor 50 may be illustrated as being configured with a CdS (cadmium sulfide) sensor, and the motion detection sensor 52 It may be exemplified that the infrared sensor PIR (Passive Infra Red) sensor is configured. The illuminance sensor 50 is a sensor that senses the brightness of light, that is, illuminance, and the motion sensor is a sensor that senses movement of a person or an animal.

As shown in FIG. 3, the switching circuit 60 may be configured using a triac that operates by switching by the output of the lighting control unit 40.

In addition, the lighting control unit 40 includes a receiving unit 42 receiving a sensing signal from the illuminance sensor 50, a receiving unit 44 receiving a sensing signal from the motion detection sensor 52, and signals of the receiving units 42, 44 It may include a holding control unit 46 that provides a switching signal corresponding to.

Here, the receiving units 42 and 44 may be configured as shown in FIG. 4.

The receiving unit 42 receiving the sensing signal of the illuminance sensor 50 may include a filter 43 and a comparator 45 having hysteresis operation characteristics.

Here, the filter 43 receives the sensing signal of the illuminance sensor 50, performs noise filtering, and outputs a signal corresponding to the sensing signal, and the comparator 45 includes a reference voltage Vs1 set to a specific level and a filter The signal of 43 is compared and a signal corresponding to the comparison result is provided to the holding control unit 46. Here, the comparator 45 has a hysteresis operation characteristic. Therefore, the comparator 45 converts the output signal from a negative level to a positive level when the signal of the filter 43 is input at a voltage higher than the reference voltage Vs1 by a predetermined level, and a voltage lower than the reference voltage Vs1 by a predetermined level. Hereinafter, when a signal from the filter 43 is input, the output signal is converted from a positive level to a negative level.

In addition, the receiving unit 44 for receiving the sensing signal of the motion detection sensor 52 may include a filter 47 and a comparator 49.

Here, the filter 47 receives the sensing signal from the motion detection sensor 52, performs noise filtering, and outputs a signal corresponding to the sensing signal, and the comparator 49 includes a reference voltage Vs2 set to a specific level and The signal of the filter 47 is compared and a signal corresponding to the comparison result is provided to the holding control unit 46. Therefore, when the signal of the filter 43 is input above the reference voltage Vs1, the comparator 45 outputs the output signal at a positive level, and when the signal of the filter 43 is input below the reference voltage Vs1, the output signal Is output as a negative level.

In addition, the holding control unit 46 provides a switching signal to the switching circuit 60 in response to the signal output from the receiving units 42 and 44, and the holding control unit 46 is output from the receiving units 42 and 44. If the signal is to extinguish a lamp, the level of the switching signal is changed after a certain holding time has elapsed. The holding control unit 46 may include a timer or a delay circuit using a capacitor or a latch inside to apply a holding time when the lighting lamp is quenched. In addition, the holding control unit 46 may determine a time point at which the signal of the receiving units 42 and 44 is converted from a high level to a low level as a time point at which the lighting lamp is extinguished.

As described above, the embodiment according to the present invention may be configured, and the embodiment according to the present invention is applied to the sensing signals of the illuminance sensor 50 and the motion detection sensor 52 while performing the light emission operation by the current regulation operation. The corresponding light emission control operation is performed.

More specifically, in the case of daytime, the illuminance sensor 50 outputs a high-level voltage to extinguish the lamp 10, and at night, the illuminance sensor 50 outputs a low-level voltage to emit the lamp 10. Can be configured to output.

If it is daytime and the illuminance at the location where the lamp 10 is installed is high, the illuminance sensor 50 outputs a high-level voltage, and the receiver 42 outputs a positive-level signal to the holding control unit 46 in response thereto. At this time, the receiving unit 42 outputs a signal reflecting the hysteresis operation characteristics of the comparator 45. The holding control unit 46 provides a switching signal for turning on the switching circuit 60 by a signal from the receiving unit 42, and as a result, the switch 60 is turned on to block supply of the rectified voltage to the lamp 10. do.

Conversely, when the illumination at the location where the lighting lamp 10 is installed is low at night, the illumination sensor 50 outputs a low-level voltage, and the reception unit 42 responds to it and transmits a negative level signal to the holding control unit 46 Print. At this time, the receiving unit 42 outputs a signal reflecting the hysteresis operation characteristics of the comparator 45. The holding control unit 46 provides a switching signal for turning off the switching circuit 60 by a signal from the reception unit 42, and as a result, the switch 60 is turned off so that the rectified voltage is normally provided to the lighting lamp 10. Can be.

In this way, light emission of the lighting lamp 10 may be controlled in response to the sensing signal of the illuminance sensor 50. The holding control unit 46 may apply a holding time to block supply of the rectified voltage to the lighting lamp 10 in response to a signal output from the receiving unit 42, and the holding time may be variously implemented by the manufacturer. have.

As described above, in the embodiment according to the present invention, the lighting lamp 10 may continuously emit light by the current regulation operation at night, and the lamp 10 is extinguished during the day.

However, when the lighting lamp 10 is installed as a street lamp, a staircase lamp, or a corridor, the lighting of the lighting lamp 10 in the absence of a person causes power waste. Therefore, the embodiment according to the present invention detects the movement of a person by a sensing signal of the motion detection sensor 52, and when a person is not detected, the rectified voltage provided to the lamp 10 is blocked to turn off the lamp 10. Can be quenched. That is, the embodiment according to the present invention can be controlled so that the lighting lamp 10 emit light by limiting when a person is detected.

More specifically, when a person's motion is not detected, the motion detection sensor 52 outputs a high-level voltage to extinguish the lamp 10, and when a person's motion is detected, the motion detection sensor 52 May be configured to output a low level voltage in order to emit light 10.

When a human motion is not detected, the motion detection sensor 52 outputs a high-level voltage, and the receiving unit 44 outputs a positive-level signal to the holding control unit 46 in response thereto. The holding control unit 46 provides a switching signal for turning on the switching circuit 60 by a signal from the receiving unit 44, and as a result, the switch 60 is turned on to block the supply of the rectified voltage to the lamp 10. do.

Conversely, when a person's motion is sensed, the motion detection sensor 52 outputs a low-level voltage, and the receiver 44 outputs a negative-level signal to the holding control unit 46 in response thereto. The holding control unit 46 provides a switching signal for turning off the switching circuit 60 by a signal from the receiving unit 44, and as a result, the switch 60 is turned off so that the rectified voltage is normally provided to the lamp 10. Can be.

In this way, light emission of the lighting lamp 10 may be controlled in response to a sensing signal of the motion detection sensor 52. The holding control unit 46 may apply a holding time to block supply of the rectified voltage to the lighting lamp 10 in response to a signal output from the receiving unit 44, and the holding time may be variously implemented by the manufacturer. have.

The holding control unit 46 may operate independently or are combined with the signals of the receiving unit 42 and the receiving unit 44 to output a switching signal.

That is, in the case of night, the holding control unit 46 receives a sensing signal from the illuminance sensor 50 for light emission of the lighting lamp 10. However, the holding control unit 46 may output a switching signal for turning off the switching circuit 60 by ignoring the sensing signal of the illuminance sensor 50 when the motion detection sensor 52 does not detect the movement of a person. have.

In addition, in the case of daytime, the holding control unit 46 is a switching signal for turning on the switching circuit 60 in response to the sensing signal of the illuminance sensor 50 regardless of the sensing signal of the motion detection sensor 52 of the lamp 10 Can be printed.

In the embodiment of FIG. 1 according to the present invention, as described above, a sensor unit including one or more sensors such as light emission control of the illumination lamp 10 and an illumination sensor 50 and a motion detection sensor 52 by a current regulation operation. Light emission control corresponding to the sensing signal may be performed in parallel, and as a result, an effect of reducing power consumption while having functionality may be expected.

In addition, in the present invention, by controlling the current path of the current regulating circuit as shown in FIG. 5, light emission control corresponding to the sensing signal of the sensor unit including one or more sensors such as the illuminance sensor 50 and the motion detection sensor 52 is performed. It can be configured to be.

In the embodiment of FIG. 5, a switching circuit 70 for receiving a switching signal from the holding control unit 46 is configured, and the switching circuit 70 includes four NMOS transistors Q1, Q2, Q3, and Q4. The gates of each of the NMOS transistors Q1, Q2, Q3, and Q4 receive a switching signal from the holding control unit 46 in common. And, each of the NMOS transistors (Q1, Q2, Q3, Q4) of the NMOS transistor 52 of each switching circuit (30, 32, 34, 36) corresponding to each of the LED channels (CH1, CH2, CH3, CH4) It is configured to switch between the ground and the node between the gate and the comparator 50.

In FIG. 5, the configuration and operation of the current regulating circuit for the current regulating operation are the same as those of the embodiment of FIG. 1, and thus redundant description thereof will be omitted.

In addition, since the configuration and operation of the lighting control unit 40 in FIG. 5 are the same as in the embodiment of FIG. 1, a redundant description thereof will be omitted.

According to the embodiment of FIG. 5, the switching signal output from the holding control unit 46 is applied to the gates of each of the NMOS transistors Q1, Q2, Q3, and Q4. Each of the NMOS transistors Q1, Q2, Q3, and Q4 is turned on when a high-level switching signal is applied to the gate and turned off when a low-level switching signal is applied to the gate.

When each of the NMOS transistors Q1, Q2, Q3, and Q4 is turned on, the gate potential of each NMOS transistor 52 is fixed to a low level. That is, the NMOS transistor 52 of each switching circuit 30, 32, 34, 36 is turned off.

Conversely, when each of the NMOS transistors Q1, Q2, Q3, and Q4 is turned off, the gate potential of each NMOS transistor 52 changes according to the output of the comparator 50. That is, the NMOS transistor 52 of each switching circuit 30, 32, 34, 36 performs a selective switching operation to provide a current path corresponding to the light emission of the LED channels CH1, CH2, CH3, CH4. do.

More specifically, when the illumination at the location where the lighting lamp 10 is installed is high because it is daytime, the illumination sensor 50 outputs a high level voltage, and the reception unit 42 holds a positive level signal in response thereto. Output as The holding control unit 46 provides a switching signal for turning on the switching circuit 70 by a signal from the reception unit 42, and as a result, each of the NMOS transistors 52 of the switching circuits 30, 32, 34, 36 It is turned off to block the current path for the illumination lamp 10 to emit light.

Conversely, when the illumination at the location where the lighting lamp 10 is installed is low at night, the illumination sensor 50 outputs a low-level voltage, and the reception unit 42 responds to it and transmits a negative level signal to the holding control unit 46 Print. The holding control unit 46 provides a switching signal for turning off the switching circuit 70 by a signal from the receiving unit 42, and as a result, each NMOS transistor 52 of the switching circuits 30, 32, 34, 36 Provides a current path by the output of the comparator 50.

In addition, when a human motion is not detected, the motion detection sensor 52 outputs a high-level voltage, and the receiving unit 44 outputs a positive-level signal to the holding control unit 46 in response thereto. The holding control unit 46 provides a switching signal for turning on the switching circuit 70 by a signal from the receiving unit 44, and as a result, each of the NMOS transistors 52 of the switching circuits 30, 32, 34, 36 It is turned off to block the current path for the illumination lamp 10 to emit light.

Conversely, when a person's motion is sensed, the motion detection sensor 52 outputs a low-level voltage, and the receiver 44 outputs a negative-level signal to the holding control unit 46 in response thereto. The holding control unit 46 provides a switching signal for turning off the switching circuit 70 by a signal from the reception unit 44, and as a result, each NMOS transistor 52 of the switching circuits 30, 32, 34, 36 Provides a current path by the output of the comparator 50.

The embodiment of FIG. 5 according to the present invention is a sensor unit including one or more sensors such as light emission control of the lighting lamp 10 by a current regulation operation and an illuminance sensor 50 and a motion detection sensor 52 as described above. Light emission control corresponding to the sensing signal may be performed in parallel, and as a result, an effect of reducing power consumption while having functionality may be expected.

10: lighting 12: rectifier circuit
14: control unit 16: rectified voltage sensing unit
20: reference voltage providing unit 30, 32, 34, 36: switching circuit
40: lighting control unit 42 44: receiver
46: holding control unit 50: illuminance sensor
52: motion detection sensor 60: switching circuit
70: switching circuit

Claims (10)

In the control circuit of a light emitting diode lighting apparatus for controlling light emission of a lighting lamp including a plurality of light emitting diode channels using a rectified voltage,
A sensor unit configured to detect motion and illumination in a predetermined area in which the lighting lamp is installed and output a sensing signal corresponding to a detection result; And
Controls light emission by providing a selective current path corresponding to the emission state of the LED channels using reference voltages allocated for each LED channel, and blocking or providing the current path in response to the sensing signal Includes;
The control unit,
The switching device includes switching elements connected to the output terminals of each of the LED channels and forming the current path, by comparing the reference voltages allocated for each LED channel with a sensing voltage corresponding to the amount of current in the current path. A current regulating circuit that selectively provides the current path by switching elements;
A lighting control unit receiving the sensing signal and providing a switching signal corresponding to the sensing signal; And
And a switching circuit for controlling provision and blocking of the current path by turning on or off the switching elements in response to the switching signal. The method of claim 1,
The control circuit of a light emitting diode lighting apparatus including at least one of an illuminance sensor and a motion sensor. delete delete delete The method of claim 1, wherein the current regulating circuit,
The switching elements connected to the output terminals of each of the light emitting diode channels and performing a switching operation for selectively providing the current path; And
Comparators for controlling switching of the switching elements by comparing the reference voltage corresponding to each of the light emitting diode channels and the sensing voltage corresponding to the current amount of the current path and outputting the comparison result; and
The switching circuit controls the provision and interruption of the current path by changing the level of the comparison results of the comparators provided to the switching elements in response to the switching signal. The method of claim 6,
The switching circuit is connected to the input terminals of the switching elements, and a control circuit for a light emitting diode lighting apparatus comprising a MOS transistor for performing a switching operation in response to the switching signal. The method of claim 1, wherein the lighting control unit,
A control circuit of a light emitting diode lighting apparatus for changing the switching signal after a holding time of a predetermined time elapses after receiving the sensing signal corresponding to the extinction condition of the lighting lamp. The method of claim 1, wherein the lighting control unit,
A receiver having a hysteresis operation characteristic, receiving the sensing signal, and outputting a signal reflecting the hysteresis operation characteristic with respect to the sensing signal; And
A holding control unit that outputs the switching signal in response to a signal output from the receiving unit, and changes the switching signal after a holding time of a predetermined time has elapsed when the lighting lamp is extinguished in response to the signal output from the receiving unit; Control circuit of a light emitting diode lighting device comprising. The method of claim 1, wherein the lighting control unit,
A receiver configured to receive the sensing signal and adjust and output a gain of the sensing signal; And
A holding control unit that outputs the switching signal in response to a signal output from the receiving unit, and changes the switching signal after a holding time of a predetermined time has elapsed when the lighting lamp is extinguished in response to the signal output from the receiving unit; Control circuit of a light emitting diode lighting device comprising.

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