TWI449465B - Voltage-sensing dimming contorl system and method using the same - Google Patents
Voltage-sensing dimming contorl system and method using the same Download PDFInfo
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Description
本案係關於一種調光控制系統，尤指一種應用於發光二極體照明裝置之電壓感應式調光控制系統。 The present invention relates to a dimming control system, and more particularly to a voltage-sensing dimming control system applied to a lighting diode lighting device.
近年來由於發光二極體(Light Emitting Diode，LED)製造技術的突破，使得發光二極體的發光亮度及發光效率大幅提升，且發光二極體具有節能、環保、壽命長等特性，因而使得發光二極體逐漸取代習用的燈管或燈泡而成為新的照明裝置，廣泛地應用於例如路燈、家用照明裝置、車燈、顯示面板背光源、交通號誌指示燈、指示看板等應用。 In recent years, due to the breakthrough in the manufacturing technology of the light-emitting diode (LED), the light-emitting diode and the light-emitting efficiency of the light-emitting diode have been greatly improved, and the light-emitting diode has the characteristics of energy saving, environmental protection, long life, and the like. Light-emitting diodes have gradually replaced conventional lamps or bulbs as new lighting devices, and are widely used in applications such as street lamps, home lighting devices, vehicle lights, display panel backlights, traffic sign lights, and indicator boards.
現有的道路照明一般採用高壓鈉燈及其適用之電源供應電路來驅動。為達到節能之目的，除了選擇高效能的燈具外，更可利用實施半夜燈的方式來實現，意即在深夜之前維持燈具之正常照明亮度，但當深夜時因道路上行駛的車輛會相對較少，可以利用市電迴路前端的降壓裝置來提供較低的電壓以適當地降低燈具之照明亮度，俾達到節能及延長燈具壽命的目的。然而，如欲以發光二極體照明裝置來直接取代現有的高壓鈉燈，則發光二極體照明裝置除了須使用現有的電源供應電路架構外，且因其無調光功能而 無法達到節能之目的。 Existing road lighting is typically driven by a high pressure sodium lamp and its applicable power supply circuitry. In order to achieve energy-saving purposes, in addition to selecting high-performance lamps, it can also be realized by implementing midnight lights, which means maintaining the normal lighting brightness of the lamps before midnight, but when driving late at night, the vehicles on the roads will be relatively more Less, you can use the step-down device at the front end of the mains circuit to provide lower voltage to properly reduce the illumination brightness of the lamp, to achieve energy saving and extend the life of the lamp. However, if the existing high-pressure sodium lamp is directly replaced by a light-emitting diode lighting device, the light-emitting diode lighting device must use an existing power supply circuit structure and has no dimming function. Can not achieve the purpose of energy saving.
目前為達到調光之功能，發光二極體照明裝置需要依靠一個調光控制信號來對發光二極體照明裝置進行調光操作，因此發光二極體照明裝置便需要額外的調光控制器，來控制發光二極體照明裝置的電源供應器的輸出電流與輸出電壓。如此一來，發光二極體照明裝置便無法利用現有的電源供應電路架構，且增設調光控制器將會使整體的成本增加，且導致電路的設計複雜化。 At present, in order to achieve the function of dimming, the light-emitting diode lighting device needs to rely on a dimming control signal to perform dimming operation on the light-emitting diode lighting device, so the light-emitting diode lighting device needs an additional dimming controller. To control the output current and output voltage of the power supply of the LED lighting device. As a result, the LED lighting device cannot utilize the existing power supply circuit architecture, and the addition of the dimming controller will increase the overall cost and complicate the design of the circuit.
本案之目的在於提供一種應用於發光二極體照明裝置之電壓感應式調光控制系統，其可利用現有路燈的電源供應電路架構而無須增加調光控制器即可實現調光功能，且可以較低成本及簡單線路便達到節能與延長照明裝置使用壽命之功效。 The purpose of the present invention is to provide a voltage-sensing dimming control system for a light-emitting diode lighting device, which can utilize the power supply circuit structure of the existing street lamp without the need to increase the dimming controller to realize the dimming function, and can be compared. Low cost and simple lines achieve energy savings and extend the life of the lighting unit.
為達上述目的，本案提供一種電壓感應式調光控制系統，用以控制照明裝置的亮度，該系統包含：電源電路，包含：電源轉換器，用以電源驅動照明裝置；輸出電流感測器，連接至電源轉換器的輸出端，其係偵測電源轉換器的輸出電流以產生偵測輸出電流；輸入電壓感測器，連接至電源轉換器的輸入端，其係偵測電源轉換器的輸入電壓以產生偵測輸入電壓；以及回授控制電路，連接至輸出電流感測器、輸入電壓感測器及電源轉換器的控制端，其係根據偵測輸出電流以及偵測輸入電壓，輸出調光控制信號以控制電源轉換器的開關切換，藉此調整電源轉換器的輸出電流。其中，回授控制電路係在當電源轉換器的輸入電壓於第一電壓範圍內變化時，輸出具有第一狀態的調光控制信號以控制電源轉換器的開關切換，使得電源轉換器的輸出電流為第一定電流，而在 回授控制電路係在當電源轉換器的輸入電壓於第二電壓範圍內變化時，輸出具有第二狀態的調光控制信號以控制電源轉換器的開關切換，使得電源轉換器的輸出電流為第二定電流。 To achieve the above objective, the present invention provides a voltage-sensing dimming control system for controlling the brightness of a lighting device, the system comprising: a power circuit comprising: a power converter for powering the lighting device; and an output current sensor, Connected to the output of the power converter, which detects the output current of the power converter to generate the detected output current; the input voltage sensor is connected to the input of the power converter, which detects the input of the power converter The voltage is used to generate the detection input voltage; and the feedback control circuit is connected to the control end of the output current sensor, the input voltage sensor and the power converter, and the output is adjusted according to the detected output current and the detected input voltage. The light control signal controls the switching of the power converter to thereby adjust the output current of the power converter. Wherein, the feedback control circuit outputs a dimming control signal having a first state to control switching of the power converter when the input voltage of the power converter changes within the first voltage range, so that the output current of the power converter Is the first constant current, but The feedback control circuit outputs a dimming control signal having a second state to control switching of the power converter when the input voltage of the power converter changes within a second voltage range, so that the output current of the power converter is Two constant current.
為達上述目的，本案另提供一種電壓感應式調光控制系統，用以控制照明裝置的亮度，該系統包含：電源電路，包含：電源轉換器，用以電源驅動照明裝置；輸入電壓感測器，連接至電源轉換器的輸入端，其係偵測電源轉換器的輸入電壓以產生偵測輸入電壓；以及回授控制電路，連接至電源轉換器的輸出端，以偵測電源轉換器的輸出電壓以產生偵測輸出電壓，且回授控制電路連接至輸入電壓感測器及電源轉換器的控制端，其係根據偵測輸出電壓以及偵測輸入電壓，輸出調光控制信號以控制電源轉換器的開關切換，藉此調整電源轉換器的輸出電壓。其中回授控制電路係在當電源轉換器的輸入電壓於第一電壓範圍內變化時，輸出具有第一狀態的調光控制信號以控制電源轉換器的開關切換，使得電源轉換器的輸出電壓為第一定電壓，而在回授控制電路係在當電源轉換器的輸入電壓於第二電壓範圍內變化時，輸出具有第二狀態的調光控制信號以控制電源轉換器的開關切換，使得電源轉換器的輸出電壓為第二定電壓。 In order to achieve the above object, the present invention further provides a voltage-sensing dimming control system for controlling the brightness of the lighting device, the system comprising: a power circuit comprising: a power converter for driving the lighting device; and an input voltage sensor Connected to the input of the power converter, which detects the input voltage of the power converter to generate a detected input voltage; and a feedback control circuit that is connected to the output of the power converter to detect the output of the power converter The voltage is used to generate a detection output voltage, and the feedback control circuit is connected to the control terminal of the input voltage sensor and the power converter, and outputs a dimming control signal to control the power conversion according to the detected output voltage and the detected input voltage. Switching of the switch, thereby adjusting the output voltage of the power converter. The feedback control circuit outputs a dimming control signal having a first state to control switching of the power converter when the input voltage of the power converter changes within the first voltage range, so that the output voltage of the power converter is a certain voltage, and the feedback control circuit outputs a dimming control signal having a second state to control switching of the power converter when the input voltage of the power converter changes within a second voltage range, so that the power supply The output voltage of the converter is a second constant voltage.
為達上述目的，本案再提供一種電壓感應式調光控制系統，用以控制照明裝置的亮度，該系統包含：電源電路，包含：電源轉換器，用以電源驅動照明裝置；以及回授控制電路，連接至電源轉換器的輸出端及控制端，以偵測電源轉換器的輸出電壓以產生回授信號，並且輸出回授信號至電源轉換器的該控制端；以及輸入電壓感測器，連接至電源轉換器的輸入端及控制端，其係偵測電 源轉換器的輸入電壓以產生調光信號至電源轉換器的控制端，使電源轉換器之依據調光信號及回授信號控制電源轉換器的開關切換，以調整電源轉換器的輸出電壓；；其中當電源轉換器的輸入電壓於第一電壓範圍內變化，電源轉換器係依據調光信號及回授信號而輸出輸出電壓為第一定電壓，當電源轉換器的輸入電壓於第二電壓範圍內變化，電源轉換器係依據調光信號及回授信號而輸出輸出電壓為第二定電壓。 In order to achieve the above object, the present invention further provides a voltage-sensing dimming control system for controlling the brightness of the lighting device, the system comprising: a power circuit comprising: a power converter for driving the lighting device; and a feedback control circuit Connected to the output end of the power converter and the control end to detect the output voltage of the power converter to generate a feedback signal, and output a feedback signal to the control end of the power converter; and an input voltage sensor, connected To the input and control terminals of the power converter, which detects the electricity The input voltage of the source converter is used to generate a dimming signal to the control end of the power converter, so that the power converter controls the switching of the power converter according to the dimming signal and the feedback signal to adjust the output voltage of the power converter; When the input voltage of the power converter changes within the first voltage range, the power converter outputs the output voltage as the first constant voltage according to the dimming signal and the feedback signal, when the input voltage of the power converter is in the second voltage range. In the internal change, the power converter outputs the output voltage as the second constant voltage according to the dimming signal and the feedback signal.
為達上述目的，本案又提供一種電壓感應式調光控制系統，用以控制照明裝置的亮度，系統包含：電源電路，包含：電源轉換器，用以電源驅動照明裝置；輸出電流感測器，連接至電源轉換器的輸出端，其係偵測電源轉換器的輸出電流以產生偵測輸出電流；以及回授控制電路，連接至輸出電流感測器及該電源轉換器的控制端，其係根據一偵測輸出電流以產生回授信號，並且輸出回授信號至電源轉換器的控制端；以及輸入電壓感測器，連接至電源轉換器的輸入端及控制端，其係偵測電源轉換器的輸入電壓以產生調光信號至電源轉換器的控制端，使電源轉換器之依據調光信號及回授信號控制電源轉換器的開關切換，以調整電源轉換器的輸出電壓；其中當電源轉換器的輸入電壓於第一電壓範圍內變化，電源轉換器係依據調光信號及回授信號而輸出輸出電流為第一定電流，當電源轉換器的輸入電壓於第二電壓範圍內變化，電源轉換器係依據調光信號及回授信號而輸出輸出電流為第二定電壓。 To achieve the above purpose, the present invention further provides a voltage-sensing dimming control system for controlling the brightness of the lighting device. The system comprises: a power circuit comprising: a power converter for driving the lighting device; and an output current sensor; Connected to the output of the power converter, which detects the output current of the power converter to generate a detected output current; and a feedback control circuit that is connected to the output current sensor and the control end of the power converter According to a detection output current to generate a feedback signal, and output a feedback signal to the control end of the power converter; and an input voltage sensor connected to the input end and the control end of the power converter, which detects the power conversion The input voltage of the device is used to generate a dimming signal to the control end of the power converter, so that the power converter converts the switching of the power converter according to the dimming signal and the feedback signal to adjust the output voltage of the power converter; The input voltage of the converter changes within a first voltage range, and the power converter outputs output power according to the dimming signal and the feedback signal. For the first constant current when the input voltage of the power converter to changes in the second voltage range, the power converter system according to the dimming signal and the feedback signal and the output current of the second constant voltage.
為達上述目的，本案亦提供一種電壓感應式調光控制方法，用以控制照明裝置的亮度，其中照明裝置係由電源電路之電源轉換器 供電，控制方法包含下列步驟：(a)偵測電源轉換器之輸出電壓或輸出電流，以控制電源轉換器之輸出電壓或輸出電流維持於定電壓或定電流；(b)偵測電源轉換器所接收之輸入電壓的變化；以及(c)依據輸入電壓在不同的電壓範圍內變化時，輸出不同的定電壓之輸出電壓或不同的定電流之輸出電流給照明裝置。 In order to achieve the above object, the present invention also provides a voltage-sensing dimming control method for controlling the brightness of a lighting device, wherein the lighting device is a power converter of the power circuit. The power supply control method comprises the following steps: (a) detecting the output voltage or the output current of the power converter to control the output voltage or the output current of the power converter to be maintained at a constant voltage or a constant current; (b) detecting the power converter And receiving (c) outputting different fixed voltage output voltages or different constant current output currents to the illumination device according to the input voltage varying within different voltage ranges.
10‧‧‧調光控制系統 10‧‧‧ dimming control system
100‧‧‧電源電路 100‧‧‧Power circuit
120‧‧‧電源轉換器 120‧‧‧Power Converter
140‧‧‧回授控制電路 140‧‧‧Feedback control circuit
160‧‧‧輸出電流感測器 160‧‧‧Output current sensor
180‧‧‧輸入電壓感測器 180‧‧‧Input voltage sensor
190‧‧‧電壓解碼器 190‧‧‧Voltage decoder
Vin‧‧‧輸入交流電壓 V in ‧‧‧Input AC voltage
Vout‧‧‧輸出直流電壓 V out ‧‧‧Output DC voltage
Iout‧‧‧輸出直流電流 I out ‧‧‧Output DC current
Vdim‧‧‧調光信號 V dim ‧‧‧ dimming signal
第1圖為本案較佳實施例的電壓感應式調光控制系統的方塊圖。 Figure 1 is a block diagram of a voltage inductive dimming control system in accordance with a preferred embodiment of the present invention.
第2圖為本案另一較佳實施例的電壓感應式調光控制系統的方塊圖。 Figure 2 is a block diagram of a voltage-sensing dimming control system in accordance with another preferred embodiment of the present invention.
第3圖為本案又一較佳實施例的電壓感應式調光控制系統的方塊圖。 FIG. 3 is a block diagram of a voltage-sensing dimming control system according to still another preferred embodiment of the present invention.
第4圖為本案再一較佳實施例的電壓感應式調光控制系統的方塊圖。 Figure 4 is a block diagram of a voltage-sensing dimming control system in accordance with still another preferred embodiment of the present invention.
第5圖為第4圖所示之電壓感應式調光控制系統的一變化例。 Fig. 5 is a modification of the voltage inductive dimming control system shown in Fig. 4.
第6圖為本案較佳實施例之控制照明裝置亮度之方法的流程圖。 Figure 6 is a flow chart of a method of controlling the brightness of a lighting device in accordance with a preferred embodiment of the present invention.
第7圖為第6圖所示之控制照明裝置亮度之方法的另一流程圖。 Figure 7 is another flow chart of the method of controlling the brightness of the illumination device shown in Figure 6.
體現本案特徵與優點的典型實施例將在後段的說明中詳細敘述。應理解的是本案能夠在不同的態樣上具有各種的變化，其皆不脫離本案的範圍，且其中的說明及圖式在本質上係當作說明之用，而非用以限制本案。 Exemplary embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It is to be understood that the present invention is capable of various modifications in the various aspects of the present invention, and the description and drawings are intended to be illustrative and not limiting.
第1圖顯示本案較佳實施例的電壓感應式調光控制系統的方塊圖 。如圖所示，電壓感應式調光控制系統10包含電源電路100，其中電源電路100係包含電源轉換器120、輸出電流感測器160、輸入電壓感測器180及回授控制電路140。電源轉換器120係將輸入交流電壓Vin轉換成輸出直流電壓Vout與輸出直流電流Iout，以驅動發光二極體照明裝置(未圖示)。輸出電流感測器160係連接於電源轉換器120的輸出端，用以偵測電源轉換器120的輸出電流的變化並且輸出一偵測輸出電流。輸入電壓感測器180係連接於電源轉換器120的輸入端，用以偵測電源轉換器120的輸入電壓的變化並且輸出一偵測輸入電壓。其中，輸入交流電壓Vin的變化範圍可為例如110-277Vac。回授控制電路140係連接至輸入電壓感測器180、輸出電流感測器160及電源轉換器120，其係架構於接收輸出電流感測器160的偵測輸出電流以及輸入電壓感測器180的偵測輸入電壓，並且根據偵測輸出電流及偵測輸入電壓產生一調光控制信號，並且輸出該調光控制信號至電源轉換器120的控制端(未圖示)，藉此控制電源轉換器120的開關切換以調整電源轉換器120的輸出電壓或輸出電流，以達到調整發光二極體照明裝置的亮度的功能。 Figure 1 is a block diagram showing a voltage inductive dimming control system in accordance with a preferred embodiment of the present invention. As shown, the voltage inductive dimming control system 10 includes a power supply circuit 100, wherein the power supply circuit 100 includes a power converter 120, an output current sensor 160, an input voltage sensor 180, and a feedback control circuit 140. The power converter 120 converts the input AC voltage V in into an output DC voltage V out and an output DC current I out to drive a light-emitting diode illumination device (not shown). The output current sensor 160 is connected to the output of the power converter 120 for detecting a change in the output current of the power converter 120 and outputting a detected output current. The input voltage sensor 180 is connected to the input end of the power converter 120 for detecting a change in the input voltage of the power converter 120 and outputting a detected input voltage. Wherein, the input AC voltage V in can vary, for example, by 110-277V ac . The feedback control circuit 140 is connected to the input voltage sensor 180 , the output current sensor 160 and the power converter 120 , and is configured to receive the detected output current of the output current sensor 160 and the input voltage sensor 180 . Detecting an input voltage, and generating a dimming control signal according to the detected output current and detecting the input voltage, and outputting the dimming control signal to a control end (not shown) of the power converter 120, thereby controlling the power conversion The switching of the switch 120 adjusts the output voltage or output current of the power converter 120 to achieve the function of adjusting the brightness of the LED illumination device.
根據本案之構想，發光二極體為一種定電流驅動的發光元件，且輸入交流電壓Vin的來源一般為市電。為了讓電源轉換器120適合外部電壓變化而能夠承受來自市電的寬廣電壓範圍，電源轉換器120的輸出則為定電流或定電壓。並且，電源轉換器120輸出的定電流/定電壓不會受輸入交流電壓Vin的變化而有影響。因此，電源轉換器120可為一定電流的電源供應器，其輸出一恆定輸出電流來電源驅動發光二極體照明裝置。在這種情形下，回授控制電 路140設定為在偵測輸入電壓在第一電壓範圍內變化時，控制電源轉換器120的開關切換以讓電源轉換器120的輸出電流為第一定電流；而在偵測輸入電壓在第二電壓範圍內變化時，控制電源轉換器120的開關切換以使電源轉換器120的輸出電流為第二定電流。舉例來說，當輸入交流電壓Vin在例如110-180Vac的第一電壓範圍內變化時，回授控制電路140會根據所接收的偵測輸入電壓產生一個狀態為低的調光控制信號，並且輸出這個狀態為低的調光控制信號至電源轉換器120的控制端，以使電源轉換器120輸出第一定電流且不對發光二極體照明裝置進行調光控制。當輸入交流電壓Vin在例如180-277Vac的第二電壓範圍內變化時，回授控制電路140會根據所接收的偵測輸入電壓產生一個狀態為高的調光控制信號，並且輸出這個狀態為高的調光控制信號至電源轉換器120的控制端，以使電源轉換器120輸出第二定電流且對發光二極體照明裝置進行調光控制。 According to the concept of the present invention, the light-emitting diode is a constant-current driving light-emitting element, and the source of the input AC voltage V in is generally commercial power. In order for the power converter 120 to adapt to external voltage variations to withstand a wide range of voltages from the mains, the output of the power converter 120 is a constant current or a constant voltage. Moreover, the constant current/constant voltage output by the power converter 120 is not affected by the change of the input AC voltage V in . Therefore, the power converter 120 can be a constant current power supply that outputs a constant output current to drive the LED illumination device. In this case, the feedback control circuit 140 is configured to control the switching of the power converter 120 to switch the output current of the power converter 120 to a first constant current when the detected input voltage changes within the first voltage range; When detecting that the input voltage changes within the second voltage range, the switching of the power converter 120 is controlled such that the output current of the power converter 120 is a second constant current. For example, when the input AC voltage V in varies within a first voltage range of, for example, 110-180V ac , the feedback control circuit 140 generates a dimming control signal having a low state according to the received detected input voltage. And the dimming control signal whose state is low is output to the control end of the power converter 120, so that the power converter 120 outputs the first constant current and does not perform dimming control on the LED illumination device. When the input AC voltage V in is changed within a second voltage range of, for example, 180-277V ac , the feedback control circuit 140 generates a dimming control signal having a high state according to the received detected input voltage, and outputs the state. A high dimming control signal is applied to the control terminal of the power converter 120 to cause the power converter 120 to output a second constant current and dimming control of the LED illumination device.
第2圖顯示本案另一較佳實施例的電壓感應式調光控制系統的方塊圖。本案另外一種可行的實施例為電源轉換器120可為一定電壓的電源供應器，其輸出一恆定輸出電壓來電源驅動發光二極體照明裝置。於此實施例中，電壓感應式調光控制系統10包含電源電路100，其中該電源電路100包含電源轉換器120、輸入電壓感測器180及回授控制電路140。電源轉換器120係將輸入交流電壓Vin轉換成輸出直流電壓Vout與輸出直流電流Iout，以驅動發光二極體照明裝置(未圖示)。輸入電壓感測器180係連接於電源轉換器120的輸入端，用以偵測電源轉換器120的輸入電壓的變化並且輸出一偵測輸入電壓。其中，輸入交流電壓Vin的變化範圍可為 例如110-277Vac。回授控制電路140係連接至電源轉換器120的輸出端，以偵測電源轉換器120的輸出電壓並產生一偵測輸出電壓。回授控制電路140更連接至輸入電壓感測器180及電源轉換器120之一控制端(未圖示)，其係根據偵測輸出電壓及偵測輸入電壓產生一調光控制信號，並且輸出該調光控制信號至電源轉換器120的控制端，藉此控制電源轉換器120的開關切換以調整電源轉換器120的輸出電壓或輸出電流，以達到調整發光二極體照明裝置的亮度的功能。 Figure 2 is a block diagram showing a voltage-sensing dimming control system in accordance with another preferred embodiment of the present invention. Another possible embodiment of the present invention is that the power converter 120 can be a voltage power supply that outputs a constant output voltage to drive the LED illumination device. In this embodiment, the voltage inductive dimming control system 10 includes a power supply circuit 100, wherein the power supply circuit 100 includes a power converter 120, an input voltage sensor 180, and a feedback control circuit 140. The power converter 120 converts the input AC voltage Vin into an output DC voltage V out and an output DC current I out to drive a light-emitting diode illumination device (not shown). The input voltage sensor 180 is connected to the input end of the power converter 120 for detecting a change in the input voltage of the power converter 120 and outputting a detected input voltage. Wherein, the input AC voltage V in can vary, for example, by 110-277V ac . The feedback control circuit 140 is connected to the output of the power converter 120 to detect the output voltage of the power converter 120 and generate a detected output voltage. The feedback control circuit 140 is further connected to one of the input voltage sensor 180 and the power converter 120 (not shown), which generates a dimming control signal according to the detected output voltage and the detected input voltage, and outputs The dimming control signal is sent to the control end of the power converter 120, thereby controlling the switching of the power converter 120 to adjust the output voltage or the output current of the power converter 120 to achieve the function of adjusting the brightness of the LED illumination device. .
回授控制電路140設定為在偵測輸入電壓在第一電壓範圍內變化時，控制電源轉換器120的開關切換以使電源轉換器120的輸出電壓為第一定電壓；而在偵測輸入電壓在第二電壓範圍內變化時，控制電源轉換器120的開關切換以使電源轉換器120的輸出電壓為第二定電壓。舉例來說，當輸入交流電壓Vin在110-180Vac的第一電壓範圍內變化時，回授控制電路140會根據所接收的偵測輸入電壓產生一個狀態為低的調光控制信號，並且輸出這個狀態為低的調光控制信號至電源轉換器120的控制端，以使電源轉換器120輸出第一定電壓且不對發光二極體照明裝置進行調光控制。當輸入交流電壓Vin在180-277Vac的第二電壓範圍內變化時，回授控制電路140會根據所接收的偵測輸入電壓產生一個狀態為高的調光控制信號，並且輸出這個狀態為高的調光控制信號至電源轉換器120的控制端，以使電源轉換器120輸出第二定電壓且對發光二極體照明裝置進行調光控制。 The feedback control circuit 140 is configured to control the switching of the power converter 120 to switch the output voltage of the power converter 120 to a first constant voltage when detecting that the input voltage changes within the first voltage range; and detecting the input voltage When changing within the second voltage range, the switching of the power converter 120 is controlled such that the output voltage of the power converter 120 is a second constant voltage. For example, when the input AC voltage V in varies within a first voltage range of 110-180V ac , the feedback control circuit 140 generates a dimming control signal having a low state according to the received detected input voltage, and The dimming control signal of this state is output to the control terminal of the power converter 120 such that the power converter 120 outputs the first constant voltage and does not perform dimming control of the LED illumination device. When the input AC voltage V in varies within a second voltage range of 180-277V ac , the feedback control circuit 140 generates a dimming control signal having a high state according to the received detected input voltage, and outputs the state as The high dimming control signal is sent to the control terminal of the power converter 120 to cause the power converter 120 to output a second constant voltage and dimming control of the LED illumination device.
於一些實施例中，如第3圖所示，電壓感應式調光控制系統10之輸入電壓感測器180更可以包含一電壓解碼器(voltage decoder )190，其係架構於對輸入電壓在第一電壓範圍以及第二電壓範圍兩者間的變動次數進行解碼，以當該輸入電壓在第一電壓範圍以及第二電壓範圍兩者間的變動次數於一設定時間內達到一特定次數時，輸出對應的偵測輸入電壓至回授控制電路140，使回授控制電路140輸出對應的調光控制信號至電源轉換器120的控制端，藉此控制電源轉換器120的開關切換以調整電源轉換器120的輸出電壓或輸出電流，以達到調整發光二極體照明裝置的亮度的功能。藉由電壓解碼器190的設置，可避免電壓感應式調光控制系統10因為輸入電壓的浮動變化而產生誤動作。 In some embodiments, as shown in FIG. 3, the input voltage sensor 180 of the voltage inductive dimming control system 10 may further include a voltage decoder (voltage decoder). 190, the system is configured to decode the number of changes of the input voltage between the first voltage range and the second voltage range to change the number of times the input voltage is between the first voltage range and the second voltage range. When a certain number of times is reached within a set time, the corresponding detected input voltage is output to the feedback control circuit 140, so that the feedback control circuit 140 outputs a corresponding dimming control signal to the control end of the power converter 120, thereby controlling The switching of the power converter 120 switches to adjust the output voltage or output current of the power converter 120 to achieve the function of adjusting the brightness of the LED illumination device. By the setting of the voltage decoder 190, the voltage-induced dimming control system 10 can be prevented from malfunctioning due to a floating change in the input voltage.
回授控制電路140根據該偵測輸入電壓判斷當在偵測輸入電壓在第一電壓範圍內變化時，控制電源轉換器120的開關切換以使電源轉換器120的輸出電流為第一定電流；而在偵測輸入電壓在第二電壓範圍內變化時，控制電源轉換器120的開關切換以使電源轉換器120的輸出電流為第二定電流。或者，回授控制電路140根據該偵測輸入電壓判斷當在偵測輸入電壓在第一電壓範圍內變化時，控制電源轉換器120的開關切換以使電源轉換器120的輸出電壓為第一定電壓；而在偵測輸入電壓在第二電壓範圍內變化時，控制電源轉換器120的開關切換以使電源轉換器120的輸出電壓為第二定電壓。 The feedback control circuit 140 determines, according to the detected input voltage, that when the detected input voltage changes within the first voltage range, the switching of the power converter 120 is controlled such that the output current of the power converter 120 is the first constant current; When detecting that the input voltage changes within the second voltage range, the switching of the power converter 120 is controlled such that the output current of the power converter 120 is a second constant current. Alternatively, the feedback control circuit 140 determines, according to the detected input voltage, that when the detected input voltage changes within the first voltage range, the switching of the power converter 120 is controlled to make the output voltage of the power converter 120 be the first Voltage; and when detecting that the input voltage changes within the second voltage range, the switching of the power converter 120 is controlled such that the output voltage of the power converter 120 is a second constant voltage.
當然，電壓感應式調光控制系統內之電路的連接關係及作動方式並不侷限於如第2圖所示，於一些實施例中，如第4圖所示，電壓感測器180亦可由電源電路100內獨立出來，而與電源電路100構成電壓感應式調光控制系統10，其中輸入電壓感測器180與電源轉換器120的輸入端以及電源轉換器120之控制端電連接，用以 偵測電源轉換器120的輸入電壓的變化並且輸出一調光信號Vdim至電源轉換器120的控制端，此外，回授控制電路140則改僅與電源轉換器120之輸出端及一控制端連接，其係根據偵測電源轉換器120輸出電壓產生一回授信號，並且輸出該回授信號至電源轉換器120的控制端，如此一來，電源轉換器120之控制器便依據該調光信號Vdim及該回授信號而控制電源轉換器120的開關切換，藉此調整電源轉換器120的輸出電壓，以達到調整發光二極體照明裝置的亮度的功能，此外，當調光信號Vdim反應輸入電壓在第一電壓範圍內變化時，電源轉換器120係藉由控制開關切換而使電源轉換器120的輸出電壓為第一定電壓；而當調光信號Vdim輸入電壓在第二電壓範圍內變化時，電源轉換器120係藉由控制開關切換以使電源轉換器120的輸出電流為第二定電壓，如此一來，便維持電源轉換器120的輸出為定電壓。當然上述實施例亦可如第1圖所示增加輸出電流感測器160，藉此來達成電源轉換器120的輸出為定電流，於此不再贅述。於上述實施例中，調光信號Vdim的電壓值可為但不限於設定於0~10V變動，此外，亦可為但不限於為一脈衝寬度調變信號。 Of course, the connection relationship and the operation mode of the circuit in the voltage-sensing dimming control system are not limited to those shown in FIG. 2. In some embodiments, as shown in FIG. 4, the voltage sensor 180 may also be powered by the power source. The circuit 100 is self-contained, and the power supply circuit 100 constitutes a voltage inductive dimming control system 10, wherein the input voltage sensor 180 is electrically connected to the input end of the power converter 120 and the control end of the power converter 120 for detecting The change of the input voltage of the power converter 120 is measured and a dimming signal V dim is outputted to the control end of the power converter 120. In addition, the feedback control circuit 140 is only connected to the output end of the power converter 120 and a control terminal. And generating a feedback signal according to detecting the output voltage of the power converter 120, and outputting the feedback signal to the control end of the power converter 120, so that the controller of the power converter 120 is based on the dimming signal. V dim and said feedback signal to control the power converter switch 120, thereby adjusting the output voltage of the power converter 120 to achieve the function of adjusting the brightness of the light emitting diode lighting device, In addition, when the input voltage varies within a first voltage range dimming signal V dim reaction system by the power converter 120 controls switching so that the output voltage of the power converter 120 is a first constant voltage; and when the dimming signal When the V dim input voltage changes within the second voltage range, the power converter 120 is switched by controlling the switch so that the output current of the power converter 120 is the second constant voltage, so that the output of the power converter 120 is maintained. For constant voltage. Of course, the above embodiment can also increase the output current sensor 160 as shown in FIG. 1 , thereby achieving the output of the power converter 120 as a constant current, which will not be described herein. In the above embodiment, the voltage value of the dimming signal V dim may be, but not limited to, set to 0 to 10 V fluctuations, and may be, but not limited to, a pulse width modulation signal.
於其他實施例中，第4圖所示之電源電路100亦可包含如第1圖所示之輸出電流感測器160，亦即如第5圖所示，電流感測器160係連接於電源轉換器120之輸出端及回授控制電路140，用以偵測電源轉換器120的輸出電流的變化並且輸出一偵測輸出電流，使回授控制電路140改依據該偵測輸出電流而產生一回授信號，並且輸出該回授信號至電源轉換器120的控制端，如此一來，電源轉換器120之控制器便依據該調光信號Vdim及該回授信號而控制電源 轉換器120的開關切換，藉此調整電源轉換器120的輸出電流，以達到調整發光二極體照明裝置的亮度的功能，此外，當調光信號Vdim反應輸入電壓在第一電壓範圍內變化時，電源轉換器120係藉由控制開關切換而使電源轉換器120的輸出電流為第一定電流；而當調光信號Vdim輸入電壓在第二電壓範圍內變化時，電源轉換器120係藉由控制開關切換以使電源轉換器120的輸出電流為第二定電流。 In other embodiments, the power circuit 100 shown in FIG. 4 may also include an output current sensor 160 as shown in FIG. 1, that is, as shown in FIG. 5, the current sensor 160 is connected to the power source. The output of the converter 120 and the feedback control circuit 140 are configured to detect a change in the output current of the power converter 120 and output a detected output current, so that the feedback control circuit 140 generates a signal according to the detected output current. The feedback signal is output, and the feedback signal is output to the control end of the power converter 120. Thus, the controller of the power converter 120 controls the power converter 120 according to the dimming signal V dim and the feedback signal. Switching, thereby adjusting the output current of the power converter 120 to achieve the function of adjusting the brightness of the LED illumination device, and further, when the dimming signal V dim reflects the input voltage changes within the first voltage range, the power conversion the control system 120 by switching the output current of the power converter 120 is a first constant current; and when the dimming signal V dim input voltage within the second voltage range, the power converter 120 by control lines Off switch so that the output current of the power converter 120 is a second constant current.
以下將以第6圖並配合第1-5圖來示範性地說明本案用來控制照明裝置的亮度之方法，如第6圖所示，首先，執行步驟S1，即利用回授控制電路140來偵測電源轉換器120之輸出電流或是輸出電壓，藉此控制電源轉換器120之運作，使電源轉換器120之輸出電流或是輸出電壓維持於定電流或定電壓，接著，執行步驟S2，即藉由輸入電壓感測器180偵測電源轉換器120所接收之輸入電壓的變化，最後執行步驟S3，即依據輸入電壓在不同的電壓範圍內變化時，輸出不同的定電壓之輸出電壓或不同的定電流之輸出電流給照明裝置。 The method for controlling the brightness of the illumination device in the present case will be exemplarily described with reference to FIG. 6 and FIG. 1-5. As shown in FIG. 6, first, step S1 is performed, that is, the feedback control circuit 140 is used. Detecting the output current or the output voltage of the power converter 120, thereby controlling the operation of the power converter 120, maintaining the output current or the output voltage of the power converter 120 at a constant current or a constant voltage, and then performing step S2. That is, the input voltage sensor 180 detects the change of the input voltage received by the power converter 120, and finally performs step S3, that is, outputs different constant voltage output voltages according to the input voltage changes in different voltage ranges or The output current of different constant currents is given to the lighting device.
當然，於其他實施例中，如第7圖所示，於步驟S3中，更可利用例如第3圖所示之電壓解碼器190而將輸入電壓在不同的電壓範圍內變動次數進行解碼，以當輸入電壓在不同的電壓範圍內變動次數於一設定時間內達到一特定次數時，輸出不同的定電壓之輸出電壓或不同的定電流之輸出電流給照明裝置。 Of course, in other embodiments, as shown in FIG. 7, in step S3, for example, the voltage decoder 190 shown in FIG. 3 can be used to decode the input voltages in different voltage ranges for different times. When the input voltage changes within a different voltage range for a certain number of times, a different constant voltage output voltage or a different constant current output current is output to the illumination device.
綜合上述，本案提出一種電壓感應式調光控制系統及其控制方法，用以控制發光二極體照明裝置的亮度。本案的電壓感應式調光控制系統可以讓發光二極體照明裝置的電源供應器的輸入交流電 壓在不同的電壓範圍內變化時，輸出不同的定電壓或定電流給發光二極體照明裝置，藉此控制發光二極體照明裝置的亮度而達到調整發光二極體照明裝置的亮度的功能。因此，本案的電壓感應式調光控制系統可利用現有路燈的電源供應電路架構而無須增加調光控制器即可實現調光功能，且可以較低成本及簡單線路便達到節能與延長照明裝置使用壽命之功效。 In summary, the present invention proposes a voltage-sensing dimming control system and a control method thereof for controlling the brightness of a light-emitting diode lighting device. The voltage-sensing dimming control system of the present invention can make the input AC of the power supply of the LED lighting device When the voltage changes within different voltage ranges, different constant voltages or constant currents are output to the light-emitting diode illumination device, thereby controlling the brightness of the light-emitting diode illumination device to achieve the function of adjusting the brightness of the light-emitting diode illumination device. . Therefore, the voltage-sensing dimming control system of the present invention can realize the dimming function by using the power supply circuit structure of the existing street lamp without adding a dimming controller, and can achieve energy saving and extended lighting device use at a lower cost and a simple line. The effect of life.
本案得由熟習此技術之人士任施匠思而為諸般修飾，然皆不脫如附申請專利範圍所欲保護者。 This case has been modified by people who are familiar with the technology, but it is not intended to be protected by the scope of the patent application.
10‧‧‧調光控制系統 10‧‧‧ dimming control system
100‧‧‧電源電路 100‧‧‧Power circuit
120‧‧‧電源轉換器 120‧‧‧Power Converter
140‧‧‧回授控制電路 140‧‧‧Feedback control circuit
160‧‧‧輸出電流感測器 160‧‧‧Output current sensor
180‧‧‧輸入電壓感測器 180‧‧‧Input voltage sensor
Claims (10)
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Citations (4)
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|---|---|---|---|---|
| US6275397B1 (en) * | 2000-06-27 | 2001-08-14 | Power-One, Inc. | Power factor correction control circuit for regulating the current waveshape in a switching power supply |
| TW201023685A (en) * | 2008-08-28 | 2010-06-16 | Lemnis Lighting Patent Holding B V | Method and circuit for controlling an LED load |
| JP2011014348A (en) * | 2009-07-01 | 2011-01-20 | Minebea Co Ltd | Light-emitting diode lighting device |
| CN201839200U (en) * | 2010-11-02 | 2011-05-18 | 华南理工大学 | Power factor correction circuit with variable duty cycle control |
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2011
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6275397B1 (en) * | 2000-06-27 | 2001-08-14 | Power-One, Inc. | Power factor correction control circuit for regulating the current waveshape in a switching power supply |
| TW201023685A (en) * | 2008-08-28 | 2010-06-16 | Lemnis Lighting Patent Holding B V | Method and circuit for controlling an LED load |
| JP2011014348A (en) * | 2009-07-01 | 2011-01-20 | Minebea Co Ltd | Light-emitting diode lighting device |
| CN201839200U (en) * | 2010-11-02 | 2011-05-18 | 华南理工大学 | Power factor correction circuit with variable duty cycle control |
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