WO2019078425A1 - 조명 기기의 부품에 전력을 공급하기 위한 회로 및 이를 포함하는 조명 기기 - Google Patents
조명 기기의 부품에 전력을 공급하기 위한 회로 및 이를 포함하는 조명 기기 Download PDFInfo
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- WO2019078425A1 WO2019078425A1 PCT/KR2018/003009 KR2018003009W WO2019078425A1 WO 2019078425 A1 WO2019078425 A1 WO 2019078425A1 KR 2018003009 W KR2018003009 W KR 2018003009W WO 2019078425 A1 WO2019078425 A1 WO 2019078425A1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Definitions
- Technical aspects of the present disclosure relate to a power supply circuit, and more particularly to a power supply circuit included in a lighting apparatus and a lighting apparatus including the same.
- LEDs Light emitting diodes
- an illuminating device using an alternating current (AC) voltage as the power source of the LED may comprise a component for converting the alternating voltage.
- an illuminating device may incorporate peripheral components in order to perform operations such as brightness control, on / off, color temperature control, etc. in response to an external control or a surrounding environment. A power requirement for driving the LED and a power requirement for driving the peripheral component are different, and a method for efficiently satisfying the power requirement is needed.
- the technical idea of the present disclosure is to provide a circuit for efficiently supplying electric power to peripheral components and a lighting apparatus including the same, in a lighting apparatus including an LED.
- an apparatus includes at least a part of LED driving current passing through an LED (light emitting diode) And a converter circuit for receiving a first control signal from the component and outputting a second control signal for controlling the LED drive current by converting the first control signal can do.
- a regulator circuit may include a shunt regulator that generates a first positive supply voltage from at least a portion of the LED drive current.
- the apparatus comprises a dimming off detector for detecting a dimming off state based on a first or second control signal, and a dimming off detector for detecting a dimming off state from an alternating voltage And a current supply circuit for supplying a current generated from the full-wave rectified input voltage to the regulator circuit.
- the shunt regulator in accordance with the detected dimming off state, is turned off and the current provided by the current supply circuit can be provided to the output node of the first positive supply voltage.
- a regulator circuit may include a linear regulator that generates a second positive supply voltage from a first positive supply voltage.
- a regulator circuit may include a reference circuit that generates a reference signal that is provided to at least one of a shunt regulator and a linear regulator from a first positive supply voltage.
- a converter circuit is configured to convert a first control signal having a variable voltage to a second control signal having a variable current, a second control signal having a variable voltage, It can be converted into a control signal.
- the converter circuit may output a second level of control signal when the first control signal exceeds a predetermined upper limit.
- the converter circuit may output a second control signal having a constant level when the first control signal is below a predetermined lower limit.
- the apparatus comprises: an LED drive current generating circuit that generates an LED drive current having a magnitude that follows the magnitude of the input voltage from an input voltage that is full-wave rectified from the AC voltage, LED driver that adjusts the size of the LEDs.
- the LED driver may include a current supply circuit that provides a current generated from the input voltage to the regulator circuit based on the second control signal.
- a component that receives power from at least one positive supply voltage and generates a first control signal from an external signal of the illuminator may be included.
- an illumination device to which an AC voltage is externally supplied includes an LED array including a plurality of LEDs, an LED driver that provides an LED driving current to the LED array, A regulator circuit that generates at least one positive supply voltage from at least a portion of the at least one positive supply voltage, and a digital circuit that is powered from at least one positive supply voltage.
- a component may generate a first control signal for controlling an illuminator based on an external signal of the illuminator, And a converter circuit for outputting a second control signal for controlling the current, and the LED driver can adjust the LED driving current based on the second control signal.
- an LED array may include a plurality of LED sub-arrays each comprising LEDs of different color temperatures, and the LED driver may include a plurality of LED sub-arrays It is possible to adjust the LED driving current supplied to the LED driving circuit.
- a component may include an interface circuit for receiving an external signal via a communication channel.
- the component may include a sensor for acquiring an external signal from an external environment of the illuminator.
- a circuit for supplying power to a component included in a lighting apparatus and a lighting apparatus including the same the power consumption, space, cost, and the like can be significantly reduced.
- a circuit for supplying power to components included in a lighting apparatus and a lighting apparatus including the same can improve the power efficiency for generating a positive supply voltage.
- the circuit for supplying power to the components included in the lighting apparatus and the lighting apparatus including the same can not only miniaturize the lighting apparatus, but also illuminate various active operations It is possible to facilitate implementation of the device.
- Figs. 1A and 1B are block diagrams illustrating luminaire according to comparative examples of exemplary embodiments of the present disclosure. Fig.
- FIG. 2 is a block diagram illustrating a lighting apparatus according to an exemplary embodiment of the present disclosure
- FIG. 3 is a block diagram illustrating an example of a power delivery circuit and peripheral components of FIG. 2 in accordance with an exemplary embodiment of the present disclosure.
- Figure 4 is a block diagram illustrating an example of the regulator circuit of Figure 3 in accordance with an exemplary embodiment of the present disclosure.
- Figures 5A-5C are circuit diagrams illustrating examples of the shunt regulator of Figure 4 in accordance with the exemplary embodiments of the present disclosure.
- Figure 6 is a block diagram illustrating an example of the peripheral components and converter circuit of Figure 3 in accordance with an exemplary embodiment of the present disclosure.
- Figures 7A-7C are graphs illustrating examples of the operation of the limiter of Figure 6 in accordance with the exemplary embodiments of the present disclosure.
- Figure 8A illustrates an example of the LED driver of Figure 2 in accordance with an exemplary embodiment of the present disclosure
- Figure 8B illustrates an example of the operation of the LED driver of Figure 8A in accordance with an exemplary embodiment of the present disclosure.
- Figure 9 is an illustration of an example of the LED driver of Figure 2 in accordance with an exemplary embodiment of the present disclosure.
- Figures 10A and 10B are circuit diagrams illustrating examples of the current supply circuit of Figure 9 in accordance with the exemplary embodiments of the present disclosure.
- Figure 11 is a block diagram illustrating an example of the LED driver of Figure 2 in accordance with an exemplary embodiment of the present disclosure.
- FIG. 12 is a block diagram illustrating an example of the power transfer circuit of FIG. 2 in accordance with an exemplary embodiment of the present disclosure.
- Figures 13A-13C are circuit diagrams illustrating examples of the shunt regulator of Figure 4 in accordance with the exemplary embodiments of the present disclosure.
- Figs. 14A-14C are diagrams illustrating examples for reducing standby power consumption of the Fig. 2 illuminator in accordance with exemplary embodiments of the present disclosure
- Figure 15A is an illustration of an example of the LED driver of Figure 2 in accordance with an exemplary embodiment of the present disclosure
- Figure 15B is an illustration of an example of the current supply circuit of Figure 15A in accordance with an exemplary embodiment of the present disclosure.
- FIG. 16A is a diagram illustrating an example of the power transfer circuit of FIG. 2 in accordance with an exemplary embodiment of the present disclosure
- FIG. 16B is an illustration of an example of the dimming off current supply circuit of FIG. 16A in accordance with an exemplary embodiment of the present disclosure; to be.
- Figs. 17A-17C illustrate examples of the operation of the power transfer circuit of Fig. 16A and the dimming off current supply circuit of Fig. 16B, in accordance with the exemplary embodiments of the present disclosure.
- 18A and 18B are block diagrams illustrating examples of luminaires in accordance with exemplary embodiments of the present disclosure.
- FIG. 19 is a flow diagram illustrating a method of powering peripheral components in an illuminator including an LED in accordance with an exemplary embodiment of the present disclosure
- 20A and 20B are diagrams illustrating luminaire devices according to exemplary embodiments of the present disclosure.
- 21 is a diagram illustrating a home-network including a lighting device according to an exemplary embodiment of the present disclosure
- Figs. 1A and 1B are block diagrams illustrating luminaire according to comparative examples of exemplary embodiments of the present disclosure.
- the lighting devices 10a and 10b may include LED arrays 16a and 16b as light sources and may supply power from the AC voltage V_AC to the LED arrays 16a and 16b.
- 1a includes an AC / DC converter 13a to provide a positive supply voltage V_DD to the peripheral component 14a, while the lighting device 10b of FIG. May include a linear regulator 13b to provide a positive supply voltage V_DD to peripheral component 14b.
- the lighting device 10b of FIG. May include a linear regulator 13b to provide a positive supply voltage V_DD to peripheral component 14b.
- the lighting apparatus 10a includes an EMI filter 11a, a full-wave rectifier 12a, an AC / DC converter 13a, a peripheral component 14a, an LED driver 15a and an LED array 16a .
- the EMI filter 11a can receive the AC voltage V_AC and can remove the high frequency component due to the switching current generated in the AC / DC converter 13a.
- the full-wave rectifier 12a can generate an input voltage V_IN having a full-wave rectified potential with respect to the ground potential GND from an AC voltage V_AC such as a sinusoidal wave. 1A, the input voltage V_IN generated by the full-wave rectifier 12a may be provided to the AC / DC converter 13a and the LED driver 15a.
- the AC / DC converter 13a may generate a positive supply voltage V_DD for peripheral component 14a from input voltage V_IN.
- the AC / DC converter 13a may include a transformer or an inductor and may be a large capacity capacitor, a switch such as a power transistor, And a control integrated circuit for control.
- the AC / DC converter 13a can have a large volume, and consequently can limit the miniaturization of the lighting apparatus 10a, and the EMI filter 11a for the AC / It is possible to further restrict the miniaturization of the battery 10a.
- AC / DC converter 13a generates a supply voltage V_DD of a few volts (e.g., 5V, 3.3V) from an input voltage V_IN of tens to hundreds of volts (e.g., 220Vrms) It can have low power efficiency. For example, power lost due to low power efficiency can be converted into thermal energy and released, thereby deteriorating the characteristics of the lighting apparatus 10a, and as a specification of the lighting apparatus 10a, (lm / W).
- the peripheral component 14a can receive power from the AC / DC converter 13a through the positive supply voltage V_DD and generate and transmit the control signal CTR to the LED driver 15a.
- the peripheral component 14a can control the intensity of light emitted from the LED array 16a through the control signal CTR.
- the LED driver 15a can generate the LED drive current I_LED from the input voltage V_IN and can provide the LED drive current I_LED to the LED array 16a including the plurality of LEDs.
- the LED driver 15a can adjust the LED drive current I_LED to provide to the LED array 16a in response to the control signal CTR.
- the lighting apparatus 10b may include a full-wave rectifier 12b, a linear regulator 13b, peripheral components 14b, an LED driver 15b, and an LED array 16b.
- the linear regulator 13b generates a positive supply voltage V_IN from the full wave rectified input voltage V_IN from the AC voltage V_AC to provide a positive supply voltage V_DD to the peripheral component 14b, It is possible to generate the voltage V_DD.
- Linear regulator 13b generates a positive supply voltage V_DD of several volts from an input voltage V_IN of tens to hundreds of volts, To provide low power efficiency.
- the power loss generated in the linear regulator 13b can be released as heat, which may degrade the characteristics of the illuminator 10b and cause malfunction, failure, etc. of the linear regulator 13b.
- the AC voltage V_AC is applied to the full-wave rectified input voltage V_IN or AC voltage
- the component that generates a positive supply voltage V_DD from V_AC may degrade the characteristics of the luminaires 10a, 10b. Accordingly, the inclusion of the peripheral components 14a and 14b in the illumination devices 10a and 10b may be restricted, and as a result, the implementation of the illumination devices 10a and 10b that provide various functions may be limited.
- FIG. 2 is a block diagram illustrating a lighting device 100 in accordance with an exemplary embodiment of the present disclosure.
- the lighting device 100 may include an LED array 160 as a light source, and may be included in a lamp for indoor lighting, outdoor lighting, portable lighting, vehicle lighting, and the like as a non-limiting example.
- the luminaires 10a, 10b may be removable from the lamp as an independently distributed unit.
- the lighting apparatus 100 can receive power from the AC voltage V_AC and includes a full wave rectifier 120, a power transfer circuit 130, peripheral components 140, an LED driver 150 ) And an LED array 160.
- two or more components included in the illuminator 100 may be included in one semiconductor package.
- the power transfer circuit 130, the peripheral component 140, and the LED driver 150 may be included in one semiconductor package, two or more of which may be included in one semiconductor package, Packages.
- the full wave rectifier 120 may generate an input voltage V_IN having a full-wave rectified potential with respect to the ground potential GND from an AC voltage V_AC such as a sinusoidal wave. 2, the input voltage V_IN may be provided to the LED driver 150, and the power transfer circuit 130 and the peripheral component 140 may be connected to the ground potential GND.
- the LED array 160 may include at least one LED and may be configured as at least one LED string comprising cascaded LEDs.
- the LED array 160 may include at least one LED having substantially the same color temperature, and may include a plurality of LEDs each having two or more different color temperatures.
- Each of the LED strings included in the LED array 160 can receive at least a portion of the LED drive current I_LED and the intensity of the light emitted according to the magnitude of the current passing therethrough can be determined.
- the LED driver 150 can generate the LED driving current I_LED from the input voltage V_IN and provide the LED driving current I_LED to the LED array 160. Also, as shown in FIG. 2, the LED driver 150 may receive the LED driving current I_LED that has passed through the LED array 160. The LED driver 150 may provide at least a portion I_LED 'of the LED drive current I_LED to the power transfer circuit 130. In some embodiments, current I_LED 'may be substantially equal to LED drive current I_LED. In some embodiments, the current I_LED 'may match the current through some LED strings of the LED array 160, e.g., some LED sub-arrays.
- a positive supply voltage V_DD of the peripheral component 140 can be generated from at least a portion I_LED 'of the LED drive current I_LED, which is provided to the power transfer circuit 130, as described below.
- the LED driver 150 may adjust the LED current I_LED based on the second control signal CTR2 received from the power transfer circuit 130. Examples of the LED driver 150 will be described later with reference to Figs. 8A, 8B, 9, 11, and the like.
- the power transfer circuit 130 may receive at least a portion I_LED 'of the LED drive current I_LED from the LED driver 150 and generate a positive supply voltage V_DD from the current I_LED' (140). That is, instead of being generated directly from the input voltage V_IN, the positive supply voltage V_DD as the power source of the peripheral component 140 may be generated from the LED drive current I_LED used to emit light in the LED array 160 May be generated from at least part (I_LED ').
- the node from which the current I_LED 'moves from the LED driver 150 to the power transfer circuit 130 is reduced from the input voltage V_IN due to the voltage drop by the LED driver 150 and the LED array 160 Lt; / RTI > voltage.
- a positive supply voltage V_DD for the peripheral component 140 can be easily generated without using the switches 13a and 13b of FIG.
- the power transfer circuit 130 may receive a first control signal CTR1 for controlling the lighting device 100 from the peripheral component 140 and may receive the first control signal CTR1, To generate the second control signal CTR2 for adjusting the LED driving current I_LED and provide the second control signal CTR2 to the LED driver 150.
- the first control signal CTR1 output from the peripheral component 140 may have a voltage between the positive supply voltage V_DD and the ground potential GND and accordingly the power transfer circuit 130 may generate the first control signal
- the second control signal CTR2 that can be detected by the LED driver 150 can be generated by converting the first control signal CTR1. Examples of the power transfer circuit 130 will be described later with reference to FIG. 3 and the like.
- the peripheral component 140 may operate based on the power provided by the positive supply voltage V_DD and may generate the first control signal CTR1.
- peripheral component 140 may include digital circuitry and / or analog circuitry to receive a positive supply voltage V_DD.
- the peripheral component 140 may generate a first control signal CTR1 based on an external signal received via a wired or wireless communication channel with an external device.
- peripheral component 140 may include, but is not limited to, a module for wired communication such as Universal Serial Bus (USB), Power Line Communication (PLC) And may include modules for wireless communication such as Bluetooth, ZigBee, TVWS (TV White Space), WiFi, and the like.
- the communication module included in the peripheral component 140 can be operated by the positive supply voltage V_DD and the first control signal CTR1 can be generated based on the command received from the outside via the communication channel.
- the peripheral component 140 may generate the first control signal CTR1 by sensing the external environment of the lighting device 100.
- the peripheral component 140 may include, as a non-limiting example, a sensor that converts a sensed external signal to an electrical signal, such as a temperature sensor, an ambient light sensor, a motion sensor, an infrared sensor, a microphone,
- the first control signal CTR1 may be generated based on the output signal of the sensor.
- the peripheral component 140 may internally generate the first control signal CTR1.
- the peripheral component 140 may include a timer and the like as a non-limiting example, and may generate the first control signal CTR1 based on the output of the timer.
- FIG. 3 is a block diagram illustrating an example of a power transfer circuit 130 and peripheral components 140 of FIG. 2 in accordance with an exemplary embodiment of the present disclosure.
- the power transfer circuit 130 ' may provide a positive supply voltage V_DD to the peripheral component 140' and the peripheral component 140 'may provide the first control signal CTR1, To the power transfer circuit 130 '.
- FIG. 3 will be described with reference to FIG.
- the power transfer circuit 130 ' may include a regulator circuit 132 and a converter circuit 134.
- the regulator circuit 132 may generate a positive supply voltage V_DD from the current I_LED 'provided from the LED driver 150 of FIG. 3, a capacitor C_OUT may be disposed between a node to which a positive supply voltage V_DD is transferred from the regulator circuit 132 to the peripheral component 140 'and a ground potential GND, The capacitor C_OUT can provide an instantaneous load current that occurs at the peripheral component 140 '.
- An example of the regulator circuit 132 will be described below with reference to Fig.
- the converter circuit 134 may generate the second control signal CTR2 by converting the first control signal CTR1 and may provide the second control signal CTR2 to the LED driver 150 of Figure 2 .
- the converter circuit 134 may generate a second control signal CTR2 having a variable voltage or variable current by converting a first control signal CTR1 having a variable voltage. That is, the converter circuit 134 may perform the function of a voltage-voltage or voltage-current converter.
- the converter circuit 134 may generate a second control signal CTR2, which is a non-electrical signal such as an optical signal, for example, by converting the first control signal CTR1, which is an electrical signal.
- An example of the converter circuit 134 will be described later with reference to Fig.
- the regulator circuit 132 'of FIG. 4 may generate a positive supply voltage V_DD from the current I_LED' provided from the LED driver 150 of FIG. 4, the regulator circuit 132 'is capable of generating a plurality of positive supply voltages V_DD1, V_DD2, V_DD3 and includes a shunt regulator 132_2, a reference circuit 132_4 and linear regulators 132_2, (132_6, 132_8).
- a regulator circuit 132 ' including two linear regulators 132_6 and 132_8 is shown in the example of FIG. 4, according to the exemplary embodiments of the present disclosure, the regulator circuit may include one or more linear regulators , And may not include a linear regulator.
- the shunt regulator 132_2 may adjust the supply of current to the load to keep the first positive supply voltage V_DD1 constant. That is, the shunt regulator 132_2 can provide the first positive supply voltage V_DD1 by adjusting the magnitude of the current flowing toward the ground potential GND among the current I_LED '. As shown in FIG. 4, the first positive supply voltage V_DD1 generated by the shunt regulator 132_2 may be provided to other components of the regulator circuit 132 '. Accordingly, the shunt regulator 132_2 may be referred to as a master regulator, and the linear regulators 132_6 and 132_8 may be referred to as slave regulators. Examples of the shunt regulator 132_2 will be described later with reference to Figs. 5A to 5C.
- the reference circuit 132_4 can generate the reference signal REF from the first positive supply voltage V_DD1.
- the reference signal REF may be a reference current having a predetermined magnitude
- the reference signal REF may be a reference voltage having a predetermined magnitude and, in some embodiments, The circuit 132_4 may generate both the reference current and the reference voltage.
- the reference signal REF may be provided to another regulator, that is, the shunt regulator 132_2 and the linear regulators 132_6 and 132_8.
- the reference circuit 132_4 may receive the input voltage V_IN of FIG. For example, when the magnitude of the first positive supply voltage V_DD1 is not sufficient to generate the reference signal REF, the reference circuit 132_4 generates the reference signal REF from the input voltage V_IN .
- Linear regulators 132_6 and 132_8 may receive the first positive supply voltage V_DD1 and the reference signal REF and may generate positive supply voltages V_DD2 and V_DD3. In other words, the first linear regulator 132_6 may generate the second positive supply voltage V_DD2 while the second linear regulator 132_8 may generate the third positive supply voltage V_DD3. Linear regulators 132_6 and 132_8 generate the second and third positive supply voltages V_DD2 and V_DD3 from the first positive supply voltage V_DD1 of several volts provided by the shunt regulator 132_2, Lt; / RTI >
- FIGS. 5A-5C are circuit diagrams illustrating examples of the shunt regulator 132_2 of Figure 4 in accordance with the exemplary embodiments of the present disclosure.
- the shunt regulators 132_2a, 132_2b, 132_2c of Figures 5A-5C are adapted to output a first positive supply voltage (I_LED ') from the current I_LED' provided from the LED driver 150 of Figure 2 V_DD1).
- I_LED ' first positive supply voltage
- the shunt regulators 132_2a, 132_2b, 132_2c of FIGS. 5A-5C are only examples, and a shunt regulator of a different structure from the shunt regulators 132_2a, 132_2b, 132_2c may be used.
- the shunt regulator 132_2a may include a zener diode Z51. Accordingly, the first positive supply voltage V_DD1 may substantially coincide with the breakdown voltage of the zener diode Z51.
- the current I_LED ' may be branched into the load current I_LOAD and the shunt current I_SHUNT, and the zener diode Z51 may be turned on when the load current I_LOAD increases,
- the shunt current I_SHUNT decreases and the first positive supply voltage V_DD1 can be kept constant.
- the load current I_LOAD decreases, the shunt current I_SHUNT increases by the decrease,
- One positive supply voltage V_DD1 can be maintained constant.
- a capacitor C51a may be connected to an output node of the shunt regulator 132_2a, that is, a node at which the first positive supply voltage V_DD1 is output.
- the first positive supply voltage V_DD1 may be determined by the reference voltage V_REF and resistors R51 and R52 according to Equation (1).
- the reference voltage V_REF may be provided from the reference circuit 132_4 in FIG. 4, or may be generated within the shunt regulator 132_2b in some embodiments.
- a bipolar npn transistor may be used instead of the NMOS transistor N51.
- the capacitor C51b may be connected to the output node of the shunt regulator 132_2b, that is, to the node where the first positive supply voltage V_DD1 is output.
- the shunt regulator 132_2c may include an operational amplifier A52, a PMOS transistor P51, and resistors R51 and R52. Accordingly, the first positive supply voltage V_DD1 can be determined by the reference voltage V_REF and the resistors R51 and R52 as shown in Equation (1) above.
- the reference voltage V_REF may be provided from the reference circuit 132_4 in FIG. 4 in some embodiments and may be generated within the shunt regulator 132_2c in some embodiments.
- a bipolar pnp transistor may be used instead of the PMOS transistor P51.
- a capacitor C51c may be connected to a node where the output node of the shunt regulator 132_2c, that is, the first positive supply voltage V_DD1 is output.
- the shunt regulators 132_2b and 132_2c are controlled by the operational amplifier A51 so that the currents of the NMOS or PMOS transistors N51 and P51 decrease or increase as the load current increases or decreases.
- a positive supply voltage V_DD1 may be determined as shown in Equation (1).
- FIG. 6 is a block diagram illustrating an example of a peripheral component 140 'and converter circuit 134 of FIG. 3 in accordance with an exemplary embodiment of the present disclosure.
- the peripheral component 140 " of Figure 6 may generate a first control signal CTR1 from an external signal EXT, and the converter circuit 134 '
- the second control signal CTR2 may be generated from the second control signal CTR1.
- the peripheral component 140 " may include a controller 142 and a filter 144.
- the controller 142 receives an external signal EXT generated from the exterior of the lighting device 100 of Fig.
- the controller 142 can generate a pulse width modulation (PWM) signal PWM from the external signal EXT.
- PWM pulse width modulation
- a positive pulse width or a negative pulse width of the pulse width modulation signal PWM can be generated in proportion to the intensity of the light to generate a pulse width modulation signal PWM for adjusting the intensity of light emitted by the apparatus 100 .
- the filter 144 may generate the first control signal CTR1 by filtering the pulse width modulation signal PWM. For example, the filter 144 low-pass-filters the pulse width modulation signal PWM to generate a first control signal CTR1 having a voltage proportional to the positive pulse width of the pulse width modulation signal PWM .
- the filter 144 may include passive components such as resistors, capacitors in some embodiments.
- the controller 142 may generate an analog signal for adjusting the intensity of the light emitted by the illuminator 100 in response to the external signal EXT, Can be increased proportionately.
- the filter 144 may be omitted.
- the converter circuit 134 may include a limiter 134_2 and a converter 134_4.
- the limiter 134_2 can generate the limited signal LIM by limiting the first control signal CTR1 to a predetermined range.
- the limiter 134_2 may have a predetermined upper bound and / or a lower bound according to the variable range of brightness and may compare the first control signal CTR1 with the upper limit and / It is possible to generate a limited signal (LIM). Exemplary operations of the limiter 134_2 will be described below with reference to Figs. 7A to 7C.
- the converter 134_4 may generate the second control signal CTR2 by converting the limited signal LIM.
- the second control signal CTR2 may be provided to the LED driver 150 and the LED driver 150 may have a different reference potential from the peripheral component 140, The signal LIM which is limited so that the second control signal CTR2 has a variable current can be converted by the converter 134_4.
- the first control signal CTR1 and the limited signal LIM may have a voltage that varies according to the information that it encounters, and the converter 134_4 may generate a positive signal LIM from the limited signal LIM having a varying voltage And generate a second control signal CTR2 having a variable voltage based on the supply voltage V_DD. That is, the converter 134_4 can function as a voltage-to-voltage converter.
- the second control signal CTR2 may be provided to the LED driver 150 and the LED driver 150 may have a different reference potential from the peripheral component 140, The signal LIM limited so that the two control signals CTR2 have a variable voltage can be converted by the converter 134_4.
- Figures 7A-7C are graphs illustrating examples of operation of the limiter 134_2 of Figure 6 in accordance with the illustrative embodiments of the present disclosure.
- the limiter 134_2 can generate the limited signal LIM by limiting the first control signal CTR1 based on the predetermined upper limit and / or lower limit.
- the first control signal CTR1 and the limited signal LIM are assumed to have a variable voltage, and the horizontal and vertical axes of the graphs represent the magnitude of the voltage.
- the limiter 134_2 may have an upper limit V_UB and may output a limited signal LIM having a constant voltage V1a when the magnitude of the first control signal CTR1 exceeds the upper limit V_UB, Lt; / RTI >
- the upper limit V_UB may be determined based on the range of the second control signal CTR2 that the LED driver 150 of Fig. 2 is acceptable to.
- the limiter 134_2 may have an upper limit V_UB and a lower limit V_LB and may have a constant voltage V1c when the magnitude of the first control signal CTR1 exceeds the upper limit V_UB While generating a limited signal LIM while generating a limited signal LIM having a constant voltage V2c when it is below the lower limit V_LB.
- the limiter 134_2 when the magnitude of the first control signal CTR1 is smaller than the predetermined lower limit V_LB, the light is emitted from the LED array 160 of FIG. 2 by the limiter 134_2 May generate a limited signal LIM having a constant voltage V2c.
- the limiter 134_2 of the converter circuit 134' may be omitted, and referring to FIG. 2, the LED driver 150 may include a limiter that behaves like the limiter 134_2 , The converter circuit 134 'may provide the second control signal CTR2 to the LED driver 150 only by converting the first control signal CTR1 without limitation of the upper and lower limits.
- the function of the limiter 134_2 that limits the lower and upper limits of the first control signal CTR1 may be implemented separately in the converter circuit 134 'and the LED driver 150, respectively. For example, the first control signal CTR1 of a smaller size than the predetermined lower limit may be processed in the converter circuit 134 ', and the second control signal CTR2 of a size larger than the predetermined upper limit in the LED driver 150 ) May be processed.
- the converter circuit 134 ' may further include a dimming off detector.
- the converter circuit 134 ' may further include a dimming off detector that performs an operation similar to the dimming off detector 151 of FIG. An example of the dimming off detector will be described later with reference to Fig.
- FIG. 8A illustrates an example of the LED driver 150 of FIG. 2 according to an exemplary embodiment of the present disclosure
- FIG. 8B illustrates an example of the operation of the LED driver 150a of FIG. 8A in accordance with an exemplary embodiment of the present disclosure.
- the LED driver 150a may receive the input voltage V_IN and the second control signal CTR2 and may provide the LED drive current I_LED to the LED array 160a .
- the LED driver 150a may provide the input voltage V_IN to the LED array 160a and may adjust the LED drive current I_LED.
- the LED array 160a may include an LED string STR comprising a plurality of LEDs connected in series.
- the LED string STR may include a plurality of LED groups G1 to G4.
- the LED groups G1 to G4 may include at least one LED, a plurality of LEDs may be a cascaded LED configuration, and a plurality of LEDs may be a serial and parallel configuration. As shown in Fig. 8A, both ends of the LED string STR and the coupling points between the LED groups G1 to G4 can be connected to the LED driver 150a.
- the LED driver 150a may include a converter 152a and a plurality of current sources 153a to 156a.
- the converter 152a can generate the dimming signal DIM by converting the second control signal CTR2.
- the second control signal CTR2 may have a variable current or a variable voltage
- the converter 152a may convert the second control signal CTR2 to a variable voltage May generate a dimming signal DIM and may generate a dimming signal DIM having a variable current according to the method of constructing the current sources 153a to 156a.
- converter 152a may include a limiter that limits the second control signal CTR2 to an upper limit and / or a lower limit, similar to limiter 134_2 of FIG. Further, in some embodiments, the converter 152a may be omitted if the second control signal CTR2 converted to a variable voltage corresponds to a dimming signal (DIM) range that can be received by the LED driver 150a .
- the dimming signal DIM may be provided to the plurality of current sources 153a to 156a and may be used to adjust the magnitude of the currents I1 to I4 of the plurality of current sources 153a to 156a.
- the plurality of current sources 153a to 156a may be connected to the ends of the LED string STR and the coupling points between the LED groups G1 to G4, respectively.
- the first current source 153a may provide a first current I1 through the LEDs of the first group G1
- the second current source 154a may provide a first current I2 through the first and second May provide a second current I2 through the LEDs of group G1 and G2
- the third current source 155a may provide a third current I2 through LEDs of the first through third groups G1 through G3 I3
- the fourth current source 156a may provide a fourth current I4 through the LEDs of the first through fourth groups Gl to G4.
- the first to fourth currents I1 to I4 may be output to the outside of the LED driver 150a as the LED drive current I_LED.
- the first to fourth current sources 153a to 156a may respectively adjust the currents I1 to I4 in response to the dimming signal DIM.
- the LED driver 150a of FIG. 8A may generate the LED driving current I_LED having a magnitude that follows the magnitude of the full-wave rectified input voltage V_IN.
- the first current source 153a may be turned on from the state where the first to fourth current sources 153a to 156a are turned off at a time t81, and accordingly, the LED driving current I_LED is 1 < / RTI > current I1.
- the first current source 153a may be turned off at time t82 and the second current source 154a may be turned on so that the LED driving current I_LED may have the magnitude of the second current I2.
- the third current source 155a and the fourth current source 156a may be sequentially turned on at a time point t83 and at a time point t84, so that the LED driving current I_LED is the magnitude of the third current I3 And the magnitude of the fourth current I4 in sequence.
- the method of driving the LED by generating the current following the magnitude of the input voltage V_IN full-wave rectified from the AC voltage V_AC can be referred to as the AC direct LED driving method, and the AC / DC converters and the like.
- Korean Patent Publication No. 10-1490332 which is incorporated herein by reference in its entirety and is filed by the same applicant as the present application, has proposed the AC direct LED driving method.
- FIG. 9 is a diagram illustrating an example of the LED driver 150 of FIG. 2 in accordance with an exemplary embodiment of the present disclosure.
- the LED driver 150b of Fig. 9 may further include a current supply circuit 158. Fig.
- FIG. 9 the description of FIG. 9 that is the same as the description of FIG. 8A will be omitted.
- the LED driver 150b may include a converter 152b, a plurality of current sources 153b to 156b, and a current supply circuit 158 and may be configured to provide the LED drive current I_LED ). ≪ / RTI >
- the LED driver 150b can adjust the intensity of the light emitted by the LED array 160b by adjusting the LED driving current I_LED according to the second control signal CTR2.
- the second control signal CTR2 corresponding to the low light intensity is received, the magnitude of the LED drive current I_LED may decrease and the current I_LED 'transmitted to the power transfer circuit 130 of FIG. Can also be reduced. Accordingly, when the adjustment range of the light intensity is large, generation of the positive supply voltage V_DD by the power transfer circuit 130 may not be easy.
- the LED driver 150b may include a current supply circuit 158 as described below.
- the current supply circuit 158 can receive the dimming signal DIM and can generate the supplementary current I_SP. For example, the current supply circuit 158 can recognize the magnitude of the LED driving current I_LED through the dimming signal DIM, and when the magnitude of the recognized LED driving current I_LED is lower than a predetermined reference value, It is possible to generate the supplementary current I_SP. In some embodiments, the current supply circuit 158 may generate a supplemental current I_SP that varies in magnitude according to the dimming signal DIM. Examples of the current supply circuit 158 will be described later with reference to Figs. 10A and 10B.
- the LED drive current I_LED and the supplementary current I_SP can be provided to the power transfer circuit 130 as the current I_LED 'in FIG. 2, and the power transfer circuit 130 can generate the current I_LED' It is possible to stably generate the positive supply voltage V_DD.
- the current supply circuit 158 may generate supplementary current I_SP to reduce power consumption and heat generation.
- the current supply circuit 158 may generate a supplemental current I_SP that is inversely proportional to the input voltage V_IN, and may provide a substantially zero complementary current I_SP in a portion of the period of the input voltage V_IN, (I_SP).
- FIG. 10A and 10B are circuit diagrams illustrating examples of the current supply circuit 158 of FIG. 9 in accordance with the exemplary embodiments of the present disclosure.
- the current supply circuits 158a and 158b of Figs. 10A and 10B can generate the supplementary current I_SP in response to the dimming signal DIM, and Figs. 10A and 10B It is possible to generate the supplementary current I_SP from the input voltage V_IN, as shown in Fig.
- the current supply circuit 158a may include operational amplifiers A11a, A12a, A13a, an NMOS transistor N11a, and resistors R11a to R17a.
- the voltages V_A, V_SET, DIM, and V_MAX are voltages based on the node where the supplementary current I_SP is output.
- the voltage V_A of the source of the NMOS transistor N11a can be calculated by Equation (2) below.
- V_A V_SET - DIM "in the case of”
- R13a R15a "in the equation (2)
- the supplementary current I_SP can be calculated as follows.
- the magnitude of the supplementary current I_SP is approximately zero when the voltage of the dimming signal DIM exceeds " V_SET ", while the voltage of the dimming signal DIM is & When the voltage of the dimming signal DIM falls below “V_SET", it may increase.
- "V_SET” can be determined by "V_MAX” and resistors R11a, R12a.
- the current supply circuit 158b includes operational amplifiers A11b, A12b and A13b, NMOS transistors N11b, N12b and N13b, PMOS transistors P11b, P12b, P13b and P14b, (R11b to R16b).
- the voltages V_B, V_SET, DIM, and V_MAX are voltages based on the node from which the supplementary current I_SP is output.
- the drain current I_X of the NMOS transistor N11b and the drain current I_Y of the NMOS transistor N12b can be calculated as shown in Equation (4) below.
- the PMOS transistor pair P11b and P12b can form a current mirror and the PMOS transistor pair P13b and P14b can also form a current mirror. Accordingly, the drain current I_Z of the PMOS transistor P14b can correspond to the difference between the current I_X and the current I_Y, as shown in the following equation (5).
- the source voltage V_B of the NMOS transistor N13b can be calculated as shown in Equation (6) below.
- the magnitude of the supplementary current I_SP is approximately zero when the voltage of the dimming signal DIM exceeds " V_SET ", while the voltage of the dimming signal DIM is < When the voltage of the dimming signal DIM falls below “V_SET", it may increase.
- V_SET can be determined by " V_MAX " and resistors R12b and R13b.
- FIG. 11 is a block diagram illustrating an example of the LED driver 150 of FIG. 2 in accordance with an exemplary embodiment of the present disclosure.
- the LED driver 150c of FIG. 11 may further include a dimming-off detector 151 and a dimming-off current supply circuit 159.
- the dimming- Hereinafter, the description overlapping with the description of FIG. 8A and FIG. 9 in the description of FIG. 11 will be omitted.
- the LED driver 150c includes a converter 152c, a plurality of current sources 153c to 156c, a current supply circuit 158c, a dimming off detector 151 and a dimming off current supply circuit 159 And may provide the LED drive current I_LED to the LED array 160c.
- the LED driver 150c can adjust the intensity of the light emitted by the LED array 160c by adjusting the LED driving current I_LED according to the second control signal CTR2.
- an external signal e. G., A signal
- the power corresponding to the standby state is supplied to the peripheral component 140 while the illumination device 100 of Fig. 2 is turned off, that is, while the light is not emitted from the LED array 160c, .
- the external device EXT which can emit light from the LED array 160c again, is input in the turn-off state of the lighting apparatus 100 of FIG. 2, for example, the first control signal CTR1
- the peripheral component 140 normally receives the external signal EXT and supplies the first control signal CTR1 corresponding to the external signal EXT when the external signal EXT that is greater than the predetermined lower limit V_LB is input. (For example, standby power) can be supplied to the peripheral component 140.
- standby power can be supplied to the peripheral component 140.
- the supplementary current I_SP of the current supply circuit 158c may increase as the dimming signal DIM decreases when the dimming signal DIM is input to a predetermined level or less as described above.
- the supplementary current I_SP of the current supply circuit 158c may follow the input voltage V_IN, similar to the LED drive current I_LED shown in Figure 8b,
- the power consumption of the current supply circuit 158c may be greater than the standby state power consumed by the lighting apparatus 100. [ Therefore, it may be necessary to turn off the current supply circuit 158c to reduce the power consumption in the dimming off state, i.e., the standby state.
- the current I_LED in the dimming off state is approximately zero and the current supply circuit 158c is also off and the supplementary current I_SP is also approximately zero, the current I_LED 'of the lighting apparatus 100 also approximates So that the power transfer circuit 130 may not be easy to supply power to the peripheral component 140.
- the dimming-off current supply circuit 159 can supply the off current (I_OFF) which can reduce the power consumption of the lighting apparatus 100 and at the same time supply standby power to the peripheral component 140.
- the dimming off detector 151 can detect the dimming off state from the dimming signal DIM and output the dimming off signal DIM_OFF in accordance with the detected dimming off state. In some embodiments, the dimming off detector 151 may receive the second control signal CTR2 and output the dimming off signal DIM_OFF in accordance with the second control signal CTR2.
- the dimming off detector 151 may receive a separate signal indicative of a dimming off state from the power delivery circuit 130, such as a dimming off control signal, DIM_OFF).
- DIM_OFF dimming off control signal
- the dimming off signal DIM_OFF is activated, the current supply circuit 158c is turned off so that the supplementary current I_SP can be approximately zero, while the dimming off current supply circuit 159 is turned on Off current (I_OFF) to the power transfer circuit 130 of the lighting apparatus 100.
- the LED driver 150c includes a dimming off detector 151 and a dimming off current supply circuit (not shown) to supply standby power to the peripheral component 140 when the lighting apparatus 100 is in a standby state 159).
- a dimming off detector 151 and a dimming off current supply circuit (not shown) to supply standby power to the peripheral component 140 when the lighting apparatus 100 is in a standby state 159.
- various methods of supplying standby power to peripheral component 140 when illuminator 100 of FIG. 2 is in a dimming off state in accordance with exemplary embodiments of the present disclosure It will be appreciated that these are possible.
- FIG. 12 is a block diagram illustrating an example of the power transfer circuit 130 of FIG. 2 in accordance with an exemplary embodiment of the present disclosure.
- 12 shows a power transfer circuit 130 " that supplies standby power to the peripheral component 140 when the lighting apparatus 100 is in the dimming-off state of Figure 2.
- the power transfer circuit 130 " includes a dimming off detector 131 and a dimming off current supply circuit 159, similar to the dimming off detector 151 and the dimming off current supply circuit 159 included in the LED driver 150c of FIG. Circuit 139.
- the circuit 139 may be a programmable logic controller.
- the power transfer circuit 130 " in Fig. 12 is assumed to be supplied with current from the LED driver 150b in Fig. 9, and Fig. 12 will be described with reference to Fig. A description overlapping with the description of FIG. 3 will be omitted.
- the power transfer circuit 130 " may further include a regulator circuit 132 ', a converter circuit 134', a dimming off detector 131 and a dimming off current supply circuit 139.
- the regulator circuit 132 ' can receive the LED drive current I_LED and the supplementary current I_SP from the LED driver 150b in FIG. 9 and additionally receive the dimming off current supply circuit 139 Off current (I_OFF) can be supplied from the switch SW1.
- the power transfer circuit 130 " has an input voltage V_IN to supply power to the dimming off current supply circuit 139, as compared to the power transfer circuit 130 ' .
- the LED driver 150b May provide LED drive current I_LED and supplemental current I_SP that are approximately zero (e.g., by a dimming off detector similar to the dimming off detector 151 illustratively shown in FIG. 11).
- the dimming off signal (DIM_OFF) of the dimming off detector 131 included in the power transfer circuit 130 " in FIG. 12 may be provided to the LED driver 150b of FIG. 9, Driver 150b may provide LED drive current I_LED and supplemental current I_SP that are approximately zero in response to the dimming off signal DIM_OFF.
- the dimming off detector 131 can detect the dimming off state from the second control signal CTR2 and output the dimming off signal DIM_OFF when the lighting apparatus 100 of Fig. 2 enters the standby state .
- the dimming off detector 131 may receive the first control signal CTR1 and output the dimming off signal DIM_OFF based on the first control signal CTR1.
- the dimming off current supply circuit 139 is turned on and can supply the off current I_OFF to the regulator circuit 132 'of the power transfer circuit 130 ".
- a portion of the regulator circuit 132 e.g., the shunt regulator 132_2 of FIG. 4, may be turned off according to the activated dimming off signal DIM_OFF.
- a shunt regulator included in the regulator circuit 132 ' is activated when the dimming off signal DIM_OFF is activated Can be turned off.
- the shunt regulator included in the regulator circuit 132 ' can receive the current I_LED' and regulate the first positive supply voltage V_DD1.
- the average current of the off current I_OFF of the dimming off current supply circuit 139 is supplied to the shunt regulator of the regulator circuit 132 ' It may be advantageous to reduce the power consumption in the standby state of the lighting apparatus 100.
- the average current of the off current (I_OFF) of the dimming-off current supply circuit 159 in Fig. 11 also completely becomes the supply current necessary for the standby state of the peripheral component 140.
- I_OFF off current
- FIGS. 13A-13C are circuit diagrams illustrating examples of the shunt regulator 132_2 of FIG. 4 in accordance with the exemplary embodiments of the present disclosure. Specifically, FIGS. 13A-13C can receive a dimming off signal DIM_OFF when compared to shunt regulators 132_2a, 132_2b, 132_2c of FIGS. 5A-5C.
- DIM_OFF dimming off signal
- FIGS. 13A to 13C which are the same as those of FIGS. 5A to 5C will be omitted.
- the output G1 of the inverter INV may be low level according to the dimming-off signal DIM_OFF which is activated, that is, high level, and the shunt regulator 132_2a ' Can be turned off. Accordingly, the current passing through the Zener diode Z51 can be cut off, and consequently the shunt regulator 132_2a 'can be turned off.
- the shunt regulators 132_2a ', 132_2b', 132_2c 'described above with reference to FIGS. 13A-13C are illustrative only and may be turned on in response to the dimming off signal DIM_OFF in accordance with the illustrative embodiments of the present disclosure. It will be appreciated that shunt regulators of various configurations that are off may be possible.
- FIGS. 14A-14C are diagrams illustrating examples for reducing standby state power consumption of FIG. 2 lighting device 100, in accordance with exemplary embodiments of the present disclosure.
- FIG. 14A is a graph showing the operating interval of the dimming-off current supply circuits 139 and 159 in FIGS. 11 and 12 and the off period current I_OFF of the dimming-off current supply circuits 139 and 159 according to the exemplary embodiment of this disclosure
- 14B and 14C are graphs illustrating exemplary waveforms of the dimming off current supply circuits 139 and 159 of FIGS. 11 and 12, in accordance with the exemplary embodiments of the present disclosure,
- the dimming-off current supply circuit 139 of FIG. 12 is turned on every cycle of the input voltage V_IN in order to reduce standby power consumption of the lighting apparatus 100 when the dimming-off signal DIM_OFF is activated. It is possible to supply the off current I_OFF by activating the input voltage V_IN every time the input voltage V_IN is smaller than the voltage VIN_H (for example, from t91 to t94).
- the dimming off current supply circuit 139 supplies the maximum off current (IOFFmax) in a section where the input voltage V_IN is larger than the voltage VIN_L but smaller than the voltage VIN_H (for example, from t91 to t92 and from t93 to t94) And the dimming off current supply circuit 139 supplies an off current (hereinafter referred to as " off ") that decreases as the input voltage V_IN decreases in a section where the input voltage V_IN is less than the voltage VIN_L (I_OFF).
- " off "
- the current supply period (for example, the period from t91 to t94) in some embodiments is set so that the average current of the off current (I_OFF) of the dimming off current supply circuit 139 becomes the current required in the standby state of the peripheral component 140,
- the maximum off current IOFFmax may be controlled in a fixed state and the maximum off current IOFFmax may be controlled in a fixed state to control the magnitude of the voltage VIN_H to maintain the current supply period t91 to t94) may be controlled to be extended or shortened.
- the dimming off current supply circuit 139 includes an input voltage level detector 139_1, an error amplifier 139_2, a level shifter 139_3, an off reference circuit 139_4, logic gates INV , OR), an operational amplifier A22, NMOS transistors N22 and N24, and resistors R22 through R24.
- the output SIG2 of the inverter INV may be at the high level and the output SIG3 of the OR_ gate OR may be at the high level in accordance with the deactivated or low level dimming off signal DIM_OFF . Accordingly, the NMOS transistor N24 can be turned on, and the NMOS transistor N22 can be turned off, so that the off current I_OFF can be approximately zero.
- the output SIG2 of the inverter INV may be at the low level and the output SIG3 of the OR_ gate OR may be at the input voltage level (DIM_OFF) depending on the dimming-
- the NMOS transistor N22 may be in an on state, that is, in a state of supplying an off current (I_OFF) or in an off state by being set to a high level or a low level in accordance with the output SIG1 of the detector 139_1.
- the dimming off current supply circuit 139 ' may be capable of normal operation and supply the off current (I_OFF) to the first positive supply voltage (V_DD1) node.
- the error amplifier 139_2 can generate the voltage Ve by comparing and amplifying the reference voltage VREF and the voltage VDIV divided by the resistors R23 and R24 and output it to the level shifter 139_3 .
- the off reference circuit 139_4 may receive the output voltage Ve 'of the level shifter 139_3 and output the generated voltage VREF_OFF based on the first positive supply voltage V_DD1.
- the output voltage Ve of the error amplifier 139_2 is a voltage generated based on the ground voltage while the output voltage VREF_OFF of the off reference circuit 139_4 is generated based on the first positive supply voltage V_DD1
- the output voltage VREF_OFF of the off reference circuit 139_4 can be increased or decreased based on the first positive supply voltage V_DD1 in accordance with the rise or fall of the output voltage Ve of the error amplifier 139_2 , DC level shifting of the output voltage (Ve) may be required.
- the level shifter 139_3 can provide this DC level shifting and can output the DC level shifted voltage Ve 'from the output voltage Ve of the error amplifier 139_2 and can output the DC level shifted voltage Ve' Supply.
- the error amplifier 139_2 can compare the reference voltage VREF with the divided voltage VDIV and amplify the error to output an error voltage Ve that gradually decreases / increases.
- the level shifter 139_3 outputs the error voltage Ve,
- the output voltage Ve 'of the capacitor C can also gradually decrease / increase.
- the output voltage VREF_OFF of the off reference circuit 139_4 can be gradually lowered / raised as the output voltage Ve 'of the level shifter 139_3 gradually decreases or increases.
- the dimming off current supply circuit 139' (I.e., negative feedback) control in the direction of canceling the rise / fall of the supply voltage V_DD1 of the initial first amount can be provided by gradually lowering / raising the maximum off current IOFFmax of the first supply voltage V_DD1. According to this feedback control, the off-current supply circuit 139 'can control the power consumption of the lighting apparatus 100 to be reduced while supplying the standby state current of the peripheral component 140.
- the current supply period (for example, t91 to t94 in FIG. 14A) can be controlled to be extended or shortened So that the average current of the current I_OFF of the dimming off current supply circuit 139 " can be controlled to be the current required in the standby state of the peripheral component 140.
- the off current supply circuit 139 ' includes an input voltage level detector 139_1', an error amplifier 139_2 ', an off reference circuit 139_4', logic gates INV and OR, an operational amplifier A22, N22, and N24, and resistors R22 through R26.
- the input voltage level detector 139_1 ' may include resistors R25 and R26, a subtractor SUB and a comparator COMP.
- the divided voltage VIN_DIV can be generated by dividing the input voltage V_IN by the resistors R25 and R26.
- the subtracter SUB may supply the output voltage VIN_H 'to the comparator COMP by subtracting the divided voltage VIN_DIV from the output voltage Ve of the error amplifier 139_2', and the comparator COMP may output the subtractor SUB
- the output voltage VIN_H ' can be generated by comparing the output voltage VIN_H' with the reference voltage VCMP_R.
- the current supply period of the off current (I_OFF) of the dimming-off current supply circuit 139 "(for example, the period from t91 to t94 in FIG. 14A) can be extended / shortened.
- the output SIG2 of the inverter INV can be at the high level and the output SIG3 of the OR_ gate OR can be at the high level according to the deactivated or low level dimming OFF signal DIM_OFF have.
- the NMOS transistor N24 may be turned on and the NMOS transistor N22 may be turned off so that the off current I_OFF may be approximately zero.
- the output SIG2 of the inverter INV may become low level according to the dimming-off signal DIM_OFF being active, i.e., high level, and the output SIG3 of the OR- Level or low level according to the output SIG1 of the level detector 139_1 'so that the NMOS transistor N22 can be in an ON state, that is, a state in which an off current (I_OFF) is supplied or an OFF state.
- the output SIG1 may become high level
- the NMOS transistor N22 is turned off so that the off current I_OFF can be approximately zero.
- the output voltage VIN_H 'of the subtracter SUB becomes lower than the reference voltage VCMP_R of the comparator COMP while the dimming off signal DIM_OFF is active, the output SIG1 becomes low level And the NMOS transistor N24 can be turned off.
- the dimming off current supply circuit 139 " may be able to operate normally and supply the off current (I_OFF) to the node of the first positive supply voltage (V_DD1).
- the error amplifier 139_2 ' To the voltage VDIV divided by the resistors R23 and R24 and amplifying the error to output the voltage Ve to the subtractor SUB of the input voltage level detector 139_1 '
- the reference circuit 139_4 ' can output a constant voltage VREF_OFF generated based on the first positive supply voltage V_DD1. Therefore, the maximum off current IOFFmax can be calculated as shown in the following equation (8) Lt; / RTI >
- the error amplifier 139_2 can output the error voltage Ve which gradually decreases / increases by comparing the reference voltage VREF with the divided voltage VDIV and amplifying the error.
- the output voltage VIN_H 'of the subtracter SUB can also gradually decrease / increase. Therefore, the current supply period (for example, the period from t91 to t94 in FIG. 14A) of the off current (I_OFF) of the dimming-off current supply circuit 139 "can be shortened / extended.
- the off current supply circuit 139 " The power consumption of the lighting apparatus 100 can be controlled to be reduced while supplying the standby state current of the lighting apparatus 100.
- FIG. 15A is a diagram illustrating an example of the LED driver 150 of FIG. 2 according to an exemplary embodiment of the present disclosure
- FIG. 15B illustrates an example of a current supply circuit 158d of FIG. 15A in accordance with an exemplary embodiment of the present disclosure
- the LED driver 150d of FIG. 15A may further include an operation period selection circuit 151d as compared with the LED driver 150b of FIG. 9, and the current supply circuit 158d may include an operation period selection circuit It is possible to receive the operation section signal OP_INT from the control section 151d.
- FIG. 15A which is the same as the description of FIG. 8A and FIG. 9 will be omitted.
- the LED driver 150d may include a converter 152d, an operation period selection circuit 151d, a plurality of current sources 153d to 156d, and a current supply circuit 158d, 160d to provide the LED drive current I_LED.
- the operation section selection circuit 151d can receive the dimming signal DIM and the operation section control signal OP_INT_CTR.
- the operation section control signal OP_INT_CTR may indicate an operation period of the input voltage V_IN that can reduce power consumption in the current supply circuit 158d.
- the operation period control signal OP_INT_CTR is a period during which the first current source 153d operates (for example, t81 to t82 and t87 in Fig.
- the operating interval control signal OP_INT_CTR may be activated based on the times when the first through fourth current sources 153d through 156d are turned on or off, May be activated based on size.
- the operating section control signal OP_INT_CTR when the operating section control signal OP_INT_CTR is activated and a dimming signal DIM corresponding to the LED driving current I_LED lower than a predetermined reference value is received, the operating section signal OP_INT is activated , High level).
- the current supply circuit 158d can provide the supplementary current I_SP only during the relatively low period of the input voltage V_IN in response to the activated operation period signal OP_INT, The power consumption can be reduced, and the power consumption and heat generation of the LED driver 150d can be lowered.
- the supplementary current I_SP of the current supply circuit 158d may depend on the dimming signal DIM, for example, as described above with reference to Figs. 10A and 10B, and may follow the input voltage V_IN, May be a current in inverse proportion to the voltage V_IN, may have any current waveform, and may have a constant magnitude independent of the dimming signal DIM.
- the current supply circuit 158d 'of FIG. 15B differs from the current supply circuit 158a of FIG. 10A in that the NMOS transistor N12d and the inverter INV are connected to the current supply circuit 158a of FIG. And may further receive the operation interval signal OP_INT.
- the NMOS transistor N12d can be turned off so that the current supply circuit 158d 'is turned on when the active period signal OP_INT is received, for example, It is possible to supply the same supplementary current I_SP.
- I_SP inactive low level operation period signal
- the current supply circuit 158d 'of FIG. 15b may be implemented within the power transfer circuit 130 of FIG.
- the dimming-off current supply circuit 139 of Fig. 12 can receive the operation section signal OP_INT and perform the same or similar function as the current supply circuit 158d described above with reference to Fig. 15B can do.
- the current supply circuit 158d of FIG. 15A may supply supplemental current I_SP only during the active period of the operating interval signal OP_INT.
- FIG. 16A is a diagram illustrating an example of the power transfer circuit 130 of FIG. 2 according to an exemplary embodiment of the present disclosure
- FIG. 16B is a circuit diagram of the dimming off current supply circuit 139 '' ').
- the power transfer circuit 130 '' 'of FIG. 16A is provided with a dimming-off current that provides a current to the regulator circuit 132' 'even when the LED driving current I_LED is insufficient due to dimming control as well as the dimming-
- the power transfer circuit 130 '' 'of FIG. 16A further includes a dimming level detector 135, as compared to the power transfer circuit 130 " of FIG.
- the dimming level detector 135 and the dimming off current supply circuit 139 '' ' may be included in the dimming off current supply circuit 139 " '.
- the power transfer circuit 130 '' 'of FIG. 16A is assumed to be supplied with the current I_LED from the LED driver 150a of FIG. 8A, and the description of FIG. The content will be omitted.
- the power transfer circuit 130 '' ' includes a regulator circuit 132' ', a converter circuit 134' ', a dimming off detector 131', a dimming off current supply circuit 139 '' ' And a dimming level detector 135.
- the dimming off current supply circuit 139 '' ' may not receive the dimming off signal DIM_OFF so that the off current I_OFF is supplied to the regulator circuit 132' 'regardless of whether the dimming off signal DIM_OFF is activated or not. .
- the dimming off current supply circuit 139 '' ' may provide a current corresponding to the supplemental current I_SP, as described below with reference to Figures 17A-17C.
- the dimming level detector 135 may receive the second control signal CTR2 from the converter circuit 134 " to generate a dimming level signal DIM_LVL, and the dimming off current supply circuit 139 "
- the dimming level detector 135 may receive the first control signal CTR1 to generate the dimming level signal DIM_LVL from the detector 135.
- the dimming level detector 135 When the second control signal CTR2 corresponds to a dimming level equal to or lower than a predefined dimming level, the dimming level detector 135 outputs a dimming level signal DIM_LVL that is activated, for example, a high level, To the dimming off current supply circuit 139 '' ', or to provide a deactivated, eg, low level, dimming level signal DIM_LVL to the dimming off current supply circuit 139' ''.
- the dimming off current supply circuit 139 '' 'of FIG. 16B differs from the dimming off current supply circuit 139' of FIG. 14B in that the dimming level signal DIM_LVL is used instead of the dimming OFF signal DIM_OFF, And may include the same components as the components of the dimming-off current supply circuit 139 'of Fig. 14B, and the corresponding components have the same reference numerals for convenience of explanation.
- the description overlapping with the description of FIG. 14B in the description of FIG. 16b will be omitted.
- the dimming level detector 135 will provide a deactivated, e.g., low level, dimming level signal DIM_LVL . Accordingly, the off current I_OFF can be approximately zero by the turn-on NMOS transistor N24 and the turn-off NMOS transistor N22.
- the dimming level detector 135 outputs the activated dimming level signal DIM_LVL ). ≪ / RTI > Therefore, the off current (I_OFF) can be supplied to the node of the first positive supply voltage (V_DD1) in accordance with the output (SIG1) of the input voltage level detector 139_1.
- the error amplifier 139_2 can output an output voltage Ve that is proportional (e.g., linearly) to the difference between the two inputs VREF and VDIV.
- the output voltage Ve can increase when the divided voltage VDIV is lower than the reference voltage VREF, and may decrease when the divided voltage VDIV is higher than the reference voltage VREF.
- the first positive supply voltage V_DD1 may have a maximum value under full dimming (e.g., 100% dimming) such that the LED drive current I_LED is supplied at the maximum value
- the output voltage Ve of the transistor Tr2 may have a minimum voltage Ve_min. In some embodiments, a non-zero off current I_OFF may be generated, even though the output voltage Ve of the error amplifier 139_2 is the minimum output voltage Ve_min.
- the off current I_OFF may have a pulse waveform, which may degrade characteristics such as electromagnetic interference (EMI).
- EMI electromagnetic interference
- the dimming off current supply circuit 139 " ' May provide an approximately zero off current I_OFF and the dimming level detector 135 may be omitted and the dimming level signal DIM_LVL may always be in an active state, .
- the shunt regulator 132_2 of FIG. 4 needs to receive a current I_LED 'greater than the load current (e.g., I_LOAD in FIG. 5A) to receive a first amount of supply V_DD1_NOM of constant magnitude
- the voltage V_DD1 can be maintained.
- the LED driving current I_LED following the input voltage V_IN is approximately zero or the dimming signal DIM of FIG. 8A indicates that the LED driving current I_LED is low, for example, as shown in FIG. 8B,
- the capacitors for example, C51a, C51b, C51c in Figs.
- V_DD1 the supply voltage of the first amount supplied by the regulator circuit 132 ' (V_DD1) can be maintained at a constant size (V_DD1_NOM).
- the current supply circuit 158 of FIG. 9 may provide a supplementary current I_SP, as described above with reference to FIG. 9, while the power transfer circuit 130 " 'May perform a function similar to that of the current supply circuit 158 of FIG. 9 with dimming off (DIM_OFF) inactive, as described below with reference to FIGS. 17A-17C.
- 17A-17C illustrate examples of the operation of the power transfer circuit 130 '' 'of FIG. 16A and the dimming-off current supply circuit 139' '' of FIG. 16B, in accordance with the illustrative embodiments of the present disclosure .
- 17A to 17C show the operations of the power transfer circuit 130 '' 'and the dimming-off current supply circuit 139' '' according to the dimming level.
- the off current I_OFF 14A it is assumed that the input voltage V_IN has a constant magnitude in a section smaller than a predefined voltage (for example, VIN_H).
- Figs. 17A to 17C will be described with reference to Figs. 16A and 16B.
- an LED drive current I_LED that is approximately zero from the LED driver 150a (e.g., 150a in FIG. 8A)
- the shunt regulator 132_2 e.g., 132_2 in FIG. 4
- V_DD1 the first positive supply voltage
- the average value V_DD1_REG of the first positive supply voltage V_DD1 may be lower than the average value V_DD1_REG of the first positive supply voltage V_DD1 in the period in which the off current (I_OFF)
- the maximum value I_OFF_MAX of the off current I_OFF can be calculated by the feedback control of the OFF current I_OFF_MAX by the negative feedback control of the dimming off current supply circuit 139 ' (I_OFF) is greater than the average of the current supplied to the load of the first positive supply voltage (V_DD1)
- the capacitance of the capacitor C51 can be adjusted such that the linear regulators (e.g., 132_6, 132_8 of FIG. 4) of the regulator circuit 132 " It can be determined to be more than the capacitance to operate.
- the average value of the LED driving current I_LED due to the low dimming level (e.g., 30%) is provided to the load of the first positive supply voltage V_DD1
- the sum of the average (I_OFF_AVG) of the off current (I_OFF_AVG) and the average (I_LED_AVG) of the current I_LED of the LED driver is smaller than the first positive supply voltage (I_LED_AVG)
- the feedback control can be performed so as to coincide with the current supplied to the load of V_DD1.
- the maximum value I_OFF_M of the off current I_OFF_M can be determined to be a value such that "I_OFF_AVG + I_LED_AVG" coincides with the current supplied to the load of the first positive supply voltage V_DD1.
- the NMOS transistor N22 when the dimming level is equal to or higher than a predetermined dimming level (for example, 90%), the NMOS transistor N22 may be turned off according to the deactivated, low level dimming level signal DIM_LVL ,
- the off current (I_OFF) can be approximately zero.
- the average current of the current I_LED received from the LED driver (e.g., 150a in FIG. 8A) due to the very high dimming level may be much larger than the load current I_LOAD, (E.g., 132_2 in FIG. 4) of the shunt regulator can operate normally, and the first positive supply voltage V_DD1 can maintain a constant magnitude (V_DD1_NOM).
- FIGS. 18A and 18B are block diagrams illustrating examples of luminaires in accordance with exemplary embodiments of the present disclosure. Specifically, FIGS. 18A and 18B illustrate exemplary illuminators 200 and 300 that include a plurality of LED sub-arrays, each including LEDs having different color temperatures. Hereinafter, redundant contents in the description of Figs. 18A and 18B will be omitted.
- the lighting device 200 is supplied with the AC voltage V_AC and is connected to the full-wave rectifier 202, the first and second power transfer circuits 213 and 223, the peripheral components 214, 1 and second LED drivers 215, 225, first and second LED sub-arrays 216, 226, respectively.
- the first and second LED sub-arrays 216 and 226 may each include LEDs of different color temperatures.
- the first LED sub-array 216 may include LEDs having a color temperature of about 2500K
- the second LED sub-array 226 may include LEDs having a color temperature of about 6500K.
- the first power transfer circuit 213 can receive at least a portion I_LED1 'of the first LED drive current I_LED from the first LED driver 215 and generate a positive supply voltage V_DD have.
- the first and second power transfer circuits 213 and 223 may have the same or similar structure as the power transfer circuit 130 'of FIG.
- the peripheral component 214 may generate first control signals CTR11 and CTR12 to adjust the intensity of light emitted by the first and second LED subarrays 216 and 226, (CTR11) may be transmitted to the first power transfer circuit 213 while the other one (CTR12) may be transferred to the second power transfer circuit 223.
- the first and second power transfer circuits 213 and 223 can generate the second control signals CTR21 and CTR22 by converting the first control signals CTR11 and CTR12, (215, 225), respectively.
- the lighting apparatus 300 is supplied with the AC voltage V_AC and includes a full-wave rectifier 302, a power transfer circuit 313, peripheral components 314, first and second LED drivers 315, 325, first and second LED sub-arrays 316, 326, respectively.
- the illuminator 300 of Fig. 18B may include one power transfer circuit 313.
- the power transfer circuit 313 receives both at least part (I_LED1 ') of the first LED driving current I_LED1 and at least part (I_LED2') of the second LED driving current I_LED2 And can generate a positive supply voltage V_DD from the currents I_LED1 ', I_LED2'.
- the power transfer circuit 313 may receive only the current corresponding to one LED sub-array 316 (e.g., I_LED1 'or I_LED2'), as shown in Figure 18B.
- the power transfer circuit 313 may generate two or more second control signals CTR21, CTR22 from one or more first control signals CTR1.
- the power transfer circuit 313 may provide the second control signals CTR21 and CTR22 to the first and second LED drivers 315 and 325, respectively.
- the first and second LED driving currents I_LED1 and I_LED2 can be adjusted according to the two control signals CTR21 and CTR22.
- the illuminator may include three or more LED sub-arrays .
- the lighting device may include three LED sub-arrays each including a red LED, a green LED, and a blue LED, and the LED drive currents supplied to each of the three LED sub-arrays may be independently Lt; / RTI >
- the combination of the power transfer circuit, the LED driver, and the LED sub-array shown in Figs. 18A and 18B is merely an example, and a lighting apparatus including a different combination from Figs. 18A and 18B is also included in the scope of the technical scope of the present disclosure Will be understood.
- FIG. 19 is a flow diagram illustrating a method of powering peripheral components in an illuminator including an LED in accordance with an exemplary embodiment of the present disclosure; For example, the method of FIG. 19 may be performed by the power transfer circuit 130 of FIG. Referring to FIG. 19, a method of operating a lighting apparatus may include steps S200, S400, and S600, and FIG. 19 will be described below with reference to FIG.
- step S200 an operation of receiving at least a part of the LED driving current may be performed.
- the power transfer circuit 130 may receive at least a portion (I_LED ') of the LED drive current I_LED from the LED driver 150 through the LED array 160.
- step S400 an operation of generating at least one positive supply voltage and supplying it to peripheral components may be performed.
- the power transfer circuit 130 may generate a positive supply voltage V_DD from the current I_LED 'provided from the LED driver 150.
- the power transfer circuit 130 may generate a plurality of positive supply voltages.
- the peripheral component 140 may be operated by a positive supply voltage provided from the power transfer circuit 130.
- step S600 it is possible to perform an operation of converting the control signal received from the peripheral component and providing it to the LED driver.
- the power transfer circuit 130 may receive a first control signal CTR1 for controlling the illumination device 100 from the peripheral component 140, and may convert the first control signal CTR1, It is possible to generate the second control signal CTR2 for controlling the drive current I_LED.
- the power transfer circuit 130 may convert the first control signal CTR1 having a variable voltage to a second control signal CTR2 having a variable voltage or variable current, Signal to the second control signal CTR2.
- the LED driver 150 may provide the LED drive current I_LED to the LED array 160 in response to the second control signal CTR2.
- FIGS. 20A and 20B are diagrams illustrating lighting devices 400a and 400b in accordance with the exemplary embodiments of the present disclosure.
- redundant contents of the description of Figs. 20A and 20B will be omitted.
- the lighting apparatus 400a may include a socket 410a, a power source 420a, a heat dissipation unit 430a, a light source 440a, and an optical unit 450a.
- the socket 410a may be configured to be replaceable with a legacy lighting device. Electric power supplied to the lighting apparatus 400a may be applied through the socket 410a, for example, an AC voltage may be applied to the socket 410a.
- the power supply unit 420a may be separately assembled into the first power supply unit 421a and the second power supply unit 422a.
- the first power supply unit 421a may include the full-wave rectifier 120 of FIG. 2
- the second power supply unit 422a may include at least a part of the LED driver 150.
- FIG. 1a and 1b components (e.g., 11a and 13a in FIG. 1a or 13b in FIG.
- the volume of the power supply unit 420a may increase and the characteristics of the lighting apparatus 400a may be deteriorated due to heat generation of the power supply unit 420a.
- a positive supply voltage for a peripheral component from at least a portion of the LED drive current in accordance with the exemplary embodiments of the present disclosure e.g., the first power supply section 421a or
- the volume of the power source unit 420a can be reduced by omitting the second power source unit 422a, and deterioration of characteristics of the lighting apparatus 400a due to heat generation can also be solved.
- the heat dissipation unit 430a may include an internal heat dissipation unit 431a and an external heat dissipation unit 432a and the internal heat dissipation unit 431a may be directly connected to the light source 440a and / So that heat can be transmitted to the external heat radiating portion 432a. Due to the reduced heat generation in accordance with the exemplary embodiment of the present disclosure, the internal heat radiating portion 431a and the external heat radiating portion 432a may be reduced or at least partially removed.
- the optical portion 450a may include an inner optical portion (not shown) and an outer optical portion (not shown), and may be configured to evenly distribute the light emitted by the light source 440a.
- the light source 440a may receive power from the power source unit 420a and emit light to the optical unit 450a.
- the light source 440a may include a plurality of LED packages 441a, a circuit board 442a and at least one integrated circuit package 443a.
- At least one integrated circuit package 443a may include at least some of the power delivery circuitry, peripheral components, and LED drivers in accordance with the exemplary embodiments of the present disclosure.
- the plurality of LED packages 441a may be of the same type that emits light of the same wavelength. Or may be configured in a variety of different types that generate light of different wavelengths.
- the LED package 441a may be configured to include at least one of a light emitting element that emits white light by combining a phosphor of yellow, green, red, or orange color and a purple, blue, green, .
- the lighting device 400a can adjust the color rendering index (CRI) from the sodium (Na) light to the solar light level, and the color temperature can generate various white light from the candle 1500K to the blue sky 12000K, If necessary, the illumination color can be adjusted to the ambient atmosphere or mood by generating visible light of purple, blue, green, red, or orange or infrared light. It may also generate light of a special wavelength that can promote plant growth.
- CRI color rendering index
- Na sodium
- the lighting apparatus 400b may include a socket 410b, a heat dissipation unit 430b, a light source 440b, and an optical unit 450b.
- the lighting device 400b of FIG. 20B may include a light source 440b implemented as a DOB (Driver On Board).
- the light source 440b may include a circuit board 442b and may include at least one LED package 441b, an integrated circuit package 444b and a passive element 442b mounted on the circuit board 442b, (445b).
- the DOB is a structure that can benefit from the productivity, weight, and the like of the lighting device 400b, and the circuit for supplying power to peripheral components according to the exemplary embodiment of the present disclosure as described below facilitates the implementation of the DOB .
- the circuit for supplying power to the peripheral components included in the illuminator 400b provides reduced power consumption, space, and thus is mounted on the circuit board 442b of the DOB .
- circuitry for powering peripheral components and peripheral components may be included in the same integrated circuit package 444b as shown in FIG. 14B.
- the light source 440b may include two or more integrated circuit packages, and circuits for powering peripheral components and peripheral components may be included in different integrated circuit packages, respectively.
- the size of the passive element 445b mounted on the circuit board 442b in accordance with the exemplary embodiments of the present disclosure may also be reduced.
- the lighting device 400b may include a heat dissipation unit And in some embodiments the lighting device 400b may not include a heat dissipation portion. That is, according to the exemplary embodiments of the present disclosure, the power consumption of the illumination device 400b may be reduced, so that the heat dissipating portion 430b may be reduced or eliminated.
- FIG. 21 is a diagram illustrating a home-network that includes a lighting device 520 in accordance with an exemplary embodiment of the present disclosure.
- Other devices such as a wall switch 530, a wireless router 540, a home appliance 570, a door lock 580, a garage door 590, and the like, utilizing home wireless communication (ZigBee, WiFi, And can communicate with each other through the wireless communication hub 500.
- the mobile phone 550 and the like may be connected to the wireless communication hub 500 through a network 560 such as the Internet.
- the lighting device 520 may include peripheral components for connection to the hub 500 and peripheral components may be provided with a positive supply voltage from the power delivery circuit in accordance with the exemplary embodiment of the present disclosure.
- peripheral components included in the lighting device 520 may support the Internet of Things (IOT).
- IOT Internet of Things
- the brightness of the illumination by the lighting device 520 can be automatically adjusted according to the operating conditions of the bedroom, living room, porch, warehouse, household appliances, and the surrounding environment / situation or can be adjusted by the user's control.
- the brightness of the lighting device 520 can be automatically adjusted according to the type of TV program output from the TV 510 or the screen brightness of the TV 510.
- the color temperature can be lowered and the color tone can be adjusted to match the lighting.
- the color temperature can be increased and the white light of the blue color system can be adjusted.
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Abstract
Description
Claims (19)
- 조명 기기에 포함되는 부품에 전력을 공급하기 위하여, LED(light emitting diode)를 통과한 LED 구동 전류 중 적어도 일부로부터 적어도 하나의 양의 공급 전압을 생성하도록 구성된 레귤레이터 회로; 및상기 부품으로부터 제1 제어 신호를 수신하고, 상기 제1 제어 신호를 변환함으로써 상기 LED 구동 전류를 제어하기 위한 제2 제어 신호를 출력하도록 구성된 컨버터 회로를 포함하는 장치.
- 청구항 1에 있어서,상기 레귤레이터 회로는, 상기 LED 구동 전류 중 상기 적어도 일부로부터 제1 양의 공급 전압을 생성하도록 구성된 션트(shunt) 레귤레이터를 포함하는 것을 특징으로 하는 장치.
- 청구항 2에 있어서,상기 제1 또는 제2 제어 신호에 기초하여, 디밍(dimming) 오프 상태를 검출하는 디밍 오프 검출기; 및검출된 상기 디밍 오프 상태에 따라, 교류 전압으로부터 전파 정류된 입력 전압으로부터 생성된 전류를 상기 레귤레이터 회로에 제공하도록 구성된 전류 공급 회로를 더 포함하는 것을 특징으로 하는 장치.
- 청구항 3에 있어서,검출된 상기 디밍 오프 상태에 따라, 상기 션트 레귤레이터는 턴-오프되고, 상기 전류 공급 회로가 제공하는 상기 전류가 상기 제1 양의 공급 전압의 출력 노드로 제공되는 것을 특징으로 하는 장치.
- 청구항 2에 있어서,상기 제1 또는 제2 제어 신호에 기초하여, 디밍 레벨을 검출하는 디밍 레벨 검출기; 및검출된 상기 디밍 레벨에 따라, 교류 전압으로부터 전파 정류된 입력 전압으로부터 생성된 전류를 상기 레귤레이터 회로에 제공하도록 구성된 전류 공급 회로를 더 포함하는 것을 특징으로 하는 장치.
- 청구항 2에 있어서,상기 레귤레이터 회로는, 상기 제1 양의 공급 전압으로부터 제2 양의 공급 전압을 생성하도록 구성된 선형 레귤레이터를 포함하는 것을 특징으로 하는 장치.
- 청구항 6에 있어서,상기 레귤레이터 회로는, 상기 제1 양의 공급 전압으로부터 상기 션트 레귤레이터 및 상기 선형 레귤레이터 중 적어도 하나에 제공되는 기준 신호를 생성하도록 구성된 레퍼런스 회로를 포함하는 것을 특징으로 하는 장치.
- 청구항 1에 있어서,상기 컨버터 회로는, 가변 전압을 가지는 상기 제1 제어 신호를 가변 전류를 가지는 상기 제2 제어 신호, 가변 전압을 가지는 상기 제2 제어 신호 또는 가변 빛의 세기를 가지는 상기 제2 제어 신호로 변환하도록 더 구성된 것을 특징으로 하는 장치.
- 청구항 1에 있어서,상기 컨버터 회로는, 상기 제1 제어 신호가 미리 정해진 상한을 초과하는 경우, 일정한 레벨의 상기 제2 제어 신호를 출력하도록 더 구성된 것을 특징으로 하는 장치.
- 청구항 1에 있어서,상기 컨버터 회로는, 상기 제1 제어 신호가 미리 정해진 하한에 미달하는 경우, 일정한 레벨을 가지는 상기 제2 제어 신호를 출력하도록 더 구성된 것을 특징으로 하는 장치.
- 청구항 1에 있어서,교류 전압으로부터 전파 정류된 입력 전압으로부터 상기 입력 전압의 크기를 추종하는 크기를 가지는 상기 LED 구동 전류를 생성하고, 상기 제2 제어 신호에 기초하여 상기 LED 구동 전류의 크기를 조절하도록 구성된 LED 드라이버를 더 포함하는 장치.
- 청구항 11에 있어서,상기 LED 드라이버는, 상기 제2 제어 신호에 기초하여 상기 입력 전압으로부터 생성된 보충 전류를 상기 레귤레이터 회로에 제공하도록 구성된 전류 공급 회로를 포함하는 것을 특징으로 하는 장치.
- 청구항 12에 있어서,상기 LED 드라이버는, 상기 입력 전압 및 상기 LED 구동 전류 중 적어도 하나에 기초하여 동작 구간 신호를 생성하는 동작 구간 선택 회로를 더 포함하고,상기 전류 공급 회로는, 활성화된 상기 동작 구간 신호에 응답하여 상기 보충 전류를 출력하는 것을 특징으로 하는 장치.
- 청구항 1에 있어서,상기 적어도 하나의 양의 공급 전압으로부터 전력을 공급받고, 상기 조명 기기의 외부 신호로부터 상기 제1 제어 신호를 생성하도록 구성된 상기 부품을 포함하는 장치.
- 외부로부터 교류 전압이 공급되도록 구성된 조명 기기로서,적어도 하나의 LED를 포함하는 LED 어레이;상기 LED 어레이에 LED 구동 전류를 제공하도록 구성된 LED 드라이버;상기 LED 어레이를 통과한 상기 LED 구동 전류 중 적어도 일부로부터 적어도 하나의 양의 공급 전압을 생성하도록 구성된 레귤레이터 회로; 및상기 적어도 하나의 양의 공급 전압으로부터 전력을 공급받도록 구성된 회로를 포함하는 부품을 포함하는 조명 기기.
- 청구항 15에 있어서,상기 부품은, 상기 조명 기기의 외부 신호에 기초하여 상기 조명 기기를 제어하기 위한 제1 제어 신호를 생성하도록 더 구성되고,상기 조명 기기는, 상기 제1 제어 신호를 변환함으로써 상기 LED 구동 전류를 제어하기 위한 제2 제어 신호를 출력하도록 구성된 컨버터 회로를 더 포함하고,상기 LED 드라이버는 상기 제2 제어 신호에 기초하여 상기 LED 구동 전류를 조절하도록 더 구성된 것을 특징으로 하는 조명 기기.
- 청구항 16에 있어서,상기 LED 어레이는, 상이한 색온도의 LED들을 각각 포함하는 복수의 LED 서브어레이들을 포함하고,상기 LED 드라이버는 상기 제2 제어 신호에 기초하여 상기 복수의 LED 서브어레이들 각각에 공급되는 LED 구동 전류를 조절하도록 더 구성된 것을 특징으로 하는 조명 기기.
- 청구항 16에 있어서,상기 부품은, 통신 채널을 통해서 상기 외부 신호를 수신하도록 구성된 인터페이스 회로를 포함하는 것을 특징으로 하는 조명 기기.
- 청구항 16에 있어서,상기 부품은, 상기 조명 기기의 외부 환경으로부터 상기 외부 신호를 획득하도록 구성된 센서를 포함하는 것을 특징으로 하는 조명 기기.
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CN201880054421.9A CN111052864B (zh) | 2017-10-17 | 2018-03-14 | 向照明设备的部件供电的电路以及包括该电路的照明设备 |
US16/634,678 US10785842B1 (en) | 2017-10-17 | 2018-03-14 | Circuit for supplying power to components of lighting apparatus, and lighting apparatus including the same |
KR1020197034188A KR102108514B1 (ko) | 2017-10-17 | 2018-03-14 | 조명 기기의 부품에 전력을 공급하기 위한 회로 및 이를포함하는 조명 기기 |
JP2020509066A JP6836015B2 (ja) | 2017-10-17 | 2018-03-14 | 照明機器の部品に電力を供給するための回路、及びそれを含む照明機器 |
EP18868093.8A EP3700303B1 (en) | 2017-10-17 | 2018-03-14 | Circuit for supplying power to components of lighting apparatus, and lighting apparatus including same |
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KR20170134813 | 2017-10-17 | ||
KR10-2017-0134813 | 2017-10-17 |
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US (1) | US10785842B1 (ko) |
EP (1) | EP3700303B1 (ko) |
JP (1) | JP6836015B2 (ko) |
KR (1) | KR102108514B1 (ko) |
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Cited By (1)
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US10785842B1 (en) * | 2017-10-17 | 2020-09-22 | Wellang Co., Ltd. | Circuit for supplying power to components of lighting apparatus, and lighting apparatus including the same |
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EP3993249A1 (en) * | 2020-10-28 | 2022-05-04 | NXP USA, Inc. | Advanced power supply to insure safe behavior of an inverter application |
KR102296219B1 (ko) * | 2020-12-21 | 2021-09-01 | 주식회사 웰랑 | 조명 기기의 부품에 전력을 공급하기 위한 장치 및 이를 포함하는 조광가능 조명 기기 |
KR102381384B1 (ko) * | 2021-09-13 | 2022-04-01 | 주식회사 웰랑 | 높은 전력 효율을 제공하는 led 구동 장치 및 이를 포함하는 조명 기기 |
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Also Published As
Publication number | Publication date |
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EP3700303A4 (en) | 2021-06-23 |
US20200305252A1 (en) | 2020-09-24 |
KR102108514B1 (ko) | 2020-05-08 |
KR20190139992A (ko) | 2019-12-18 |
EP3700303B1 (en) | 2023-07-05 |
JP6836015B2 (ja) | 2021-02-24 |
JP2020537805A (ja) | 2020-12-24 |
CN111052864B (zh) | 2021-05-11 |
CN111052864A (zh) | 2020-04-21 |
US10785842B1 (en) | 2020-09-22 |
EP3700303A1 (en) | 2020-08-26 |
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