TW201517691A - Light emitting device - Google Patents
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本發明是有關於一種發光裝置，特別是指一種具有高功率因數及定電壓、定電流回授控制機制的發光裝置。 The invention relates to a light-emitting device, in particular to a light-emitting device with high power factor and constant voltage and constant current feedback control mechanism.
一般的發光裝置包含一發光單元，及一用於驅動發光單元的控制電路。控制電路操作時的功率因數(Power Factor；PF)與供電系統的效率有密切的關係。現有的控制電路多有加入功率因數修正電路以提高電路的功率因數。然而，由於一般具有功率因數修正功能的控制電路之電路複雜度高，導致研發及生產成本較高。因此如何發展出一種高功率因數的發光裝置，其結構簡單而能降低成本，同時兼具定電壓、定電流回授控制機制，遂成為本案進一步要探討的主題。 A typical light emitting device includes a light emitting unit and a control circuit for driving the light emitting unit. The power factor (PF) of the control circuit is closely related to the efficiency of the power supply system. Many existing control circuits have added power factor correction circuits to increase the power factor of the circuit. However, since the circuit of the control circuit generally having the power factor correction function has high complexity, the development and production costs are high. Therefore, how to develop a high-power factor light-emitting device, which has a simple structure and can reduce the cost, and has a constant voltage and constant current feedback control mechanism, has become a subject to be further discussed in this case.
因此，本發明之目的，即在提供一種具有高功率因數及定電壓、定電流回授控制機制的發光裝置。 Accordingly, it is an object of the present invention to provide a light emitting device having a high power factor and a constant voltage, constant current feedback control mechanism.
於是，本發明發光裝置，適於接收一交流訊號源產生的一交流電壓訊號，該發光裝置包含一整流電路、 一變壓器、一儲能電容、一發光單元、一共振電容、一共振電感、一開關單元、一回授單元，及一控制單元。 Therefore, the illuminating device of the present invention is adapted to receive an AC voltage signal generated by an AC signal source, and the illuminating device comprises a rectifying circuit, A transformer, a storage capacitor, an illumination unit, a resonance capacitor, a resonance inductor, a switch unit, a feedback unit, and a control unit.
該整流電路電連接於該交流訊號源以接收該交流電壓訊號，並對該交流電壓訊號整流以產生一整流訊號。該變壓器包括一一次側繞組及一二次側繞組。該一次側繞組具有一電連接於該整流電路的第一端，及一第二端。該二次側繞組具有一電連接於該一次側繞組的第二端之第一端，及一第二端。該儲能電容具有一電連接於該一次側繞組的第二端之第一端，及一接地的第二端。 The rectifier circuit is electrically connected to the AC signal source to receive the AC voltage signal, and rectifies the AC voltage signal to generate a rectified signal. The transformer includes a primary side winding and a secondary side winding. The primary side winding has a first end electrically connected to the rectifier circuit and a second end. The secondary winding has a first end electrically connected to the second end of the primary winding and a second end. The storage capacitor has a first end electrically connected to the second end of the primary side winding and a second end connected to the ground.
該發光單元具有一電連接於該一次側繞組的第一端之第一端、一第二端、一第三端及一第四端。該共振電容具有一電連接於該發光單元的第三端之第一端，及一電連接於該發光單元的第四端之第二端。該共振電感具有一電連接於該發光單元的第二端之第一端，及一電連接於該二次側繞組的第二端之第二端。 The light emitting unit has a first end electrically connected to the first end of the primary side winding, a second end, a third end and a fourth end. The resonant capacitor has a first end electrically connected to the third end of the light emitting unit, and a second end electrically connected to the fourth end of the light emitting unit. The resonant inductor has a first end electrically connected to the second end of the light emitting unit, and a second end electrically connected to the second end of the secondary side winding.
該開關單元具有一電連接於該二次側繞組的第二端之第一端、一第二端，及一接收一脈寬調變訊號的控制端，且受該脈寬調變訊號控制使其第一端及第二端切換於導通與不導通之間。該回授單元具有一電連接於該開關單元的第二端之第一端、一第二端，及一接地的接地端。該回授單元能感測該開關單元的第二端之電壓或電流訊號。 The switch unit has a first end, a second end electrically connected to the second end of the secondary winding, and a control end receiving a pulse width modulation signal, and is controlled by the pulse width modulation signal The first end and the second end are switched between conducting and non-conducting. The feedback unit has a first end electrically connected to the second end of the switch unit, a second end, and a grounded ground. The feedback unit can sense a voltage or current signal of the second end of the switch unit.
該控制單元具有一電連接於該儲能電容的第一端之供電端、一接地的接地端、一電連接於該開關單元的控制端之驅動端，及一電連接於該回授單元的第二端以接 收該回授單元的感測結果之感測端。該控制單元能產生該脈寬調變訊號並透過該驅動端輸出至該開關單元的控制端，且該控制單元能根據該供電端的電壓值調整該脈寬調變訊號的責任週期。 The control unit has a power supply end electrically connected to the first end of the storage capacitor, a grounded ground end, a driving end electrically connected to the control end of the switch unit, and an electrical connection to the feedback unit. The second end is connected Receiving the sensing end of the sensing result of the feedback unit. The control unit can generate the pulse width modulation signal and output to the control end of the switch unit through the driving end, and the control unit can adjust the duty cycle of the pulse width modulation signal according to the voltage value of the power supply end.
較佳地，該回授單元包括一感測電阻。該感測電阻具有一電連接於該回授單元的第一端及第二端之第一端，及一電連接於該回授單元的接地端的第二端。該控制單元能透過該回授單元感測該開關單元的第二端的電壓，且當該開關單元的第二端的電壓大於等於一預設臨界值時，該控制單元控制該開關單元的第一端與第二端不導通直到該脈寬調變訊號的下一個週期開始。藉此，透過回授機制有效穩定該發光單元上的電流。 Preferably, the feedback unit includes a sensing resistor. The sensing resistor has a first end electrically connected to the first end and the second end of the feedback unit, and a second end electrically connected to the ground end of the feedback unit. The control unit can sense the voltage of the second end of the switch unit through the feedback unit, and when the voltage of the second end of the switch unit is greater than or equal to a predetermined threshold, the control unit controls the first end of the switch unit It is non-conducting with the second end until the next cycle of the pulse width modulation signal begins. Thereby, the current on the light-emitting unit is effectively stabilized by the feedback mechanism.
較佳地，所述的發光裝置還包含一電連接於該整流電路及該交流訊號源之間的濾波電路。該濾波電路接收該交流電壓訊號並對該交流電壓訊號濾波，並將該濾波後的交流電壓訊號傳送給該整流電路。 Preferably, the light emitting device further comprises a filter circuit electrically connected between the rectifier circuit and the AC signal source. The filter circuit receives the AC voltage signal and filters the AC voltage signal, and transmits the filtered AC voltage signal to the rectifier circuit.
更佳地，該交流訊號源具有一第一端及一第二端。該濾波電路具有一電連接於該交流訊號源的第一端之第一端、一第二端，及一電連接於該交流訊號源的第二端之第三端。該整流電路具有一電連接於該濾波電路的第二端之第一端、一電連接於該交流訊號源的第二端之第二端、一電連接於該一次側繞組的第一端與該發光單元的第一端之第三端，及一接地的接地端。 More preferably, the AC signal source has a first end and a second end. The filter circuit has a first end electrically connected to the first end of the AC signal source, a second end, and a third end electrically connected to the second end of the AC signal source. The rectifier circuit has a first end electrically connected to the second end of the filter circuit, a second end electrically connected to the second end of the AC signal source, and a first end electrically connected to the primary side winding a third end of the first end of the light emitting unit and a grounded ground.
更佳地，該濾波電路包括一濾波電感及一濾波 電容。該濾波電感具有一電連接於該濾波電路的第一端之第一端，及一電連接於該濾波電路的第二端之第二端。該濾波電容具有一電連接於該濾波電路的第二端之第一端，及一電連接於該濾波電路的第三端之第二端。 More preferably, the filter circuit includes a filter inductor and a filter capacitance. The filter inductor has a first end electrically coupled to the first end of the filter circuit and a second end electrically coupled to the second end of the filter circuit. The filter capacitor has a first end electrically connected to the second end of the filter circuit, and a second end electrically connected to the third end of the filter circuit.
更佳地，該整流電路包括一第一二極體、一第二二極體、一第三二極體及一第四二極體。該第一二極體的陽極及陰極分別電連接於該整流電路的第一端及第三端。該第二二極體的陽極及陰極分別電連接於該整流電路的接地端及第二端。該第三二極體的陽極及陰極分別電連接於該整流電路的第二端及第三端。該第四二極體的陽極及陰極分別電連接於該整流電路的接地端及第一端。 More preferably, the rectifier circuit includes a first diode, a second diode, a third diode, and a fourth diode. The anode and the cathode of the first diode are electrically connected to the first end and the third end of the rectifier circuit, respectively. The anode and the cathode of the second diode are electrically connected to the ground end and the second end of the rectifier circuit, respectively. The anode and the cathode of the third diode are electrically connected to the second end and the third end of the rectifier circuit, respectively. The anode and the cathode of the fourth diode are electrically connected to the ground end and the first end of the rectifier circuit, respectively.
較佳地，該開關單元包括一電晶體。該電晶體的汲極、源極及閘極分別電連接於該開關單元的第一端、第二端及控制端。 Preferably, the switching unit comprises a transistor. The drain, the source and the gate of the transistor are electrically connected to the first end, the second end and the control end of the switch unit, respectively.
本發明發光裝置，適於接收一交流訊號源產生的一交流電壓訊號，該發光裝置包含一整流電路、一變壓器、一儲能電容、一發光單元、一整流二極體、一開關單元、一回授單元，及一控制單元。 The illuminating device of the present invention is adapted to receive an AC voltage signal generated by an AC signal source, the illuminating device comprising a rectifying circuit, a transformer, a storage capacitor, an illuminating unit, a rectifying diode, a switching unit, and a A feedback unit, and a control unit.
該整流電路電連接於該交流訊號源以接收該交流電壓訊號，並對該交流電壓訊號整流以產生一整流訊號。該變壓器包括一一次側繞組及一二次側繞組。該一次側繞組具有一電連接於該整流電路的第一端，及一第二端。該二次側繞組具有一電連接於該一次側繞組的第二端之第一端，及一第二端。 The rectifier circuit is electrically connected to the AC signal source to receive the AC voltage signal, and rectifies the AC voltage signal to generate a rectified signal. The transformer includes a primary side winding and a secondary side winding. The primary side winding has a first end electrically connected to the rectifier circuit and a second end. The secondary winding has a first end electrically connected to the second end of the primary winding and a second end.
該儲能電容具有一電連接於該一次側繞組的第二端之第一端，及一接地的第二端。該發光單元具有一電連接於該二次側繞組的第二端之第一端，及一第二端。該整流二極體的陽極電連接於該發光單元的第二端，其陰極電連接於該二次側繞組的第一端。 The storage capacitor has a first end electrically connected to the second end of the primary side winding and a second end connected to the ground. The light emitting unit has a first end electrically connected to the second end of the secondary side winding, and a second end. The anode of the rectifier diode is electrically connected to the second end of the light emitting unit, and the cathode thereof is electrically connected to the first end of the secondary winding.
該開關單元具有一電連接於該發光單元的第二端與該整流二極體的陽極之第一端、一第二端，及一接收一脈寬調變訊號的控制端，且受該脈寬調變訊號控制使其第一端及第二端切換於導通與不導通之間。回授單元具有一電連接於該開關單元的第二端之第一端、一第二端，及一接地的接地端。該回授單元能感測該開關單元的第二端之電壓或電流訊號。 The switch unit has a first end electrically connected to the second end of the light emitting unit and an anode of the rectifying diode, a second end, and a control end receiving a pulse width modulation signal, and receiving the pulse The wide-range variable signal control switches the first end and the second end between conduction and non-conduction. The feedback unit has a first end electrically connected to the second end of the switch unit, a second end, and a grounded ground. The feedback unit can sense a voltage or current signal of the second end of the switch unit.
該控制單元具有一電連接於該儲能電容的第一端之供電端、一接地的接地端、一電連接於該開關單元的控制端之驅動端，及一電連接於該回授單元的第二端以接收該回授單元的感測結果之感測端。該控制單元能產生該脈寬調變訊號並透過該驅動端輸出至該開關單元的控制端，且該控制單元能根據該供電端的電壓值調整該脈寬調變訊號的責任週期。 The control unit has a power supply end electrically connected to the first end of the storage capacitor, a grounded ground end, a driving end electrically connected to the control end of the switch unit, and an electrical connection to the feedback unit. The second end is configured to receive the sensing end of the sensing result of the feedback unit. The control unit can generate the pulse width modulation signal and output to the control end of the switch unit through the driving end, and the control unit can adjust the duty cycle of the pulse width modulation signal according to the voltage value of the power supply end.
較佳地，該回授單元包括一感測電阻。該感測電阻具有一電連接於該回授單元的第一端及第二端之第一端，及一電連接於該回授單元的接地端的第二端。該控制單元能透過該回授單元感測該開關單元的第二端的電壓，且當該開關單元的第二端的電壓大於等於一預設臨界值時 ，該控制單元控制該開關單元的第一端與第二端不導通直到該脈寬調變訊號的下一個週期開始。 Preferably, the feedback unit includes a sensing resistor. The sensing resistor has a first end electrically connected to the first end and the second end of the feedback unit, and a second end electrically connected to the ground end of the feedback unit. The control unit can sense the voltage of the second end of the switch unit through the feedback unit, and when the voltage of the second end of the switch unit is greater than or equal to a predetermined threshold The control unit controls the first end and the second end of the switch unit to be non-conducting until a next cycle of the pulse width modulation signal begins.
較佳地，所述的發光裝置還包含一電連接於該整流電路及該交流訊號源之間的濾波電路。該濾波電路接收該交流電壓訊號並對該交流電壓訊號濾波，並將該濾波後的交流電壓訊號傳送給該整流電路。 Preferably, the light emitting device further comprises a filter circuit electrically connected between the rectifier circuit and the AC signal source. The filter circuit receives the AC voltage signal and filters the AC voltage signal, and transmits the filtered AC voltage signal to the rectifier circuit.
更佳地，該交流訊號源具有一第一端及一第二端，該濾波電路具有一電連接於該交流訊號源的第一端之第一端、一第二端，及一電連接於該交流訊號源的第二端之第三端，該整流電路具有一電連接於該濾波電路的第二端之第一端、一電連接於該交流訊號源的第二端之第二端、一電連接於該一次側繞組的第一端之第三端，及一接地的接地端。 More preferably, the AC signal source has a first end and a second end, and the filter circuit has a first end, a second end electrically connected to the first end of the AC signal source, and an electrical connection a third end of the second end of the AC signal source, the rectifier circuit has a first end electrically connected to the second end of the filter circuit, and a second end electrically connected to the second end of the AC signal source, A third end electrically connected to the first end of the primary winding and a grounded ground.
更佳地，該濾波電路包括一濾波電感及一濾波電容，該濾波電感具有一電連接於該濾波電路的第一端之第一端，及一電連接於該濾波電路的第二端之第二端，該濾波電容具有一電連接於該濾波電路的第二端之第一端，及一電連接於該濾波電路的第三端之第二端。 More preferably, the filter circuit includes a filter inductor and a filter capacitor, the filter inductor has a first end electrically connected to the first end of the filter circuit, and a second end electrically connected to the filter circuit The filter capacitor has a first end electrically connected to the second end of the filter circuit, and a second end electrically connected to the third end of the filter circuit.
更佳地，該整流電路包括一第一二極體、一第二二極體、一第三二極體及一第四二極體，該第一二極體的陽極及陰極分別電連接於該整流電路的第一端及第三端，該第二二極體的陽極及陰極分別電連接於該整流電路的接地端及第二端，該第三二極體的陽極及陰極分別電連接於該整流電路的第二端及第三端，該第四二極體的陽極及 陰極分別電連接於該整流電路的接地端及第一端。 More preferably, the rectifier circuit includes a first diode, a second diode, a third diode, and a fourth diode. The anode and the cathode of the first diode are electrically connected to the second diode. The first end and the third end of the rectifier circuit are electrically connected to the ground end and the second end of the rectifier circuit, respectively, and the anode and the cathode of the third diode are respectively electrically connected At the second end and the third end of the rectifier circuit, the anode of the fourth diode and The cathode is electrically connected to the ground end and the first end of the rectifier circuit, respectively.
較佳地，該開關單元包括一電晶體，該電晶體的汲極、源極及閘極分別電連接於該開關單元的第一端、第二端及控制端。 Preferably, the switch unit includes a transistor, and the drain, the source and the gate of the transistor are electrically connected to the first end, the second end and the control end of the switch unit, respectively.
較佳地，該發光單元為一發光二極體單元，該發光單元包括複數個彼此並聯且分別電連接於該發光單元的第一端及第二端之間的發光二極體燈串。 Preferably, the light emitting unit is a light emitting diode unit, and the light emitting unit comprises a plurality of light emitting diode strings connected in parallel with each other and electrically connected between the first end and the second end of the light emitting unit.
本發明發光裝置，適於接收一交流訊號源產生的一交流電壓訊號，該發光裝置包含一整流電路、一變壓器、一儲能電容、儲能電感、一發光單元、一飛輪二極體、一開關單元、一回授單元，及一控制單元。 The illuminating device of the present invention is adapted to receive an AC voltage signal generated by an AC signal source, the illuminating device comprising a rectifying circuit, a transformer, a storage capacitor, a storage inductor, an illuminating unit, a flywheel diode, and a a switching unit, a feedback unit, and a control unit.
該整流電路電連接於該交流訊號源以接收該交流電壓訊號，並對該交流電壓訊號整流以產生一整流訊號。該變壓器包括一一次側繞組及一二次側繞組。該一次側繞組具有一電連接於該整流電路的第一端，及一第二端。該二次側繞組具有一電連接於該一次側繞組的第二端之第一端，及一第二端。 The rectifier circuit is electrically connected to the AC signal source to receive the AC voltage signal, and rectifies the AC voltage signal to generate a rectified signal. The transformer includes a primary side winding and a secondary side winding. The primary side winding has a first end electrically connected to the rectifier circuit and a second end. The secondary winding has a first end electrically connected to the second end of the primary winding and a second end.
該儲能電容具有一電連接於該一次側繞組的第二端之第一端，及一接地的第二端。該儲能電感具有一電連接於該二次側繞組的第二端之第一端，及一第二端。該發光單元具有一電連接於該儲能電感的第二端之第一端，及一第二端。該飛輪二極體的陽極電連接於該發光單元的第二端，其陰極電連接於該儲能電感的第一端。 The storage capacitor has a first end electrically connected to the second end of the primary side winding and a second end connected to the ground. The energy storage inductor has a first end electrically connected to the second end of the secondary side winding, and a second end. The light emitting unit has a first end electrically connected to the second end of the energy storage inductor, and a second end. The anode of the flywheel diode is electrically connected to the second end of the light emitting unit, and the cathode thereof is electrically connected to the first end of the energy storage inductor.
該開關單元具有一電連接於該發光單元的第二 端之第一端、一第二端，及一接收一脈寬調變訊號的控制端，且受該脈寬調變訊號控制使其第一端及第二端切換於導通與不導通之間。該回授單元具有一電連接於該開關單元的第二端之第一端、一第二端，及一接地的接地端。該回授單元能感測該開關單元的第二端之電壓或電流訊號。 The switch unit has a second electrically connected to the light emitting unit a first end, a second end, and a control end receiving a pulse width modulation signal, and controlled by the pulse width modulation signal, the first end and the second end are switched between conducting and non-conducting . The feedback unit has a first end electrically connected to the second end of the switch unit, a second end, and a grounded ground. The feedback unit can sense a voltage or current signal of the second end of the switch unit.
該控制單元具有一電連接於該儲能電容的第一端之供電端、一接地的接地端、一電連接於該開關單元的控制端之驅動端，及一電連接於該回授單元的第二端以接收該回授單元的感測結果之感測端。該控制單元能產生該脈寬調變訊號並透過該驅動端輸出至該開關單元的控制端，且該控制單元能根據該供電端的電壓值調整該脈寬調變訊號的責任週期。 The control unit has a power supply end electrically connected to the first end of the storage capacitor, a grounded ground end, a driving end electrically connected to the control end of the switch unit, and an electrical connection to the feedback unit. The second end is configured to receive the sensing end of the sensing result of the feedback unit. The control unit can generate the pulse width modulation signal and output to the control end of the switch unit through the driving end, and the control unit can adjust the duty cycle of the pulse width modulation signal according to the voltage value of the power supply end.
較佳地，該回授單元包括一感測電阻，該感測電阻具有一電連接於該回授單元的第一端及第二端之第一端，及一電連接於該回授單元的接地端的第二端，該控制單元能透過該回授單元感測該開關單元的第二端的電壓，且當該開關單元的第二端的電壓大於等於一預設臨界值時，該控制單元控制該開關單元的第一端與第二端不導通直到該脈寬調變訊號的下一個週期開始。 Preferably, the feedback unit includes a sensing resistor having a first end electrically connected to the first end and the second end of the feedback unit, and an electrical connection to the feedback unit The second end of the grounding end, the control unit can sense the voltage of the second end of the switching unit through the feedback unit, and when the voltage of the second end of the switching unit is greater than or equal to a predetermined threshold, the control unit controls the The first end and the second end of the switch unit are non-conducting until the next cycle of the pulse width modulation signal begins.
較佳地，所述的發光裝置還包含一電連接於該整流電路及該交流訊號源之間的濾波電路，該濾波電路接收該交流電壓訊號並對該交流電壓訊號濾波，並將該濾波後的交流電壓訊號傳送給該整流電路。 Preferably, the light-emitting device further includes a filter circuit electrically connected between the rectifier circuit and the AC signal source, the filter circuit receiving the AC voltage signal and filtering the AC voltage signal, and filtering the filter The AC voltage signal is transmitted to the rectifier circuit.
較佳地，該交流訊號源具有一第一端及一第二 端，該濾波電路具有一電連接於該交流訊號源的第一端之第一端、一第二端，及一電連接於該交流訊號源的第二端之第三端，該整流電路具有一電連接於該濾波電路的第二端之第一端、一電連接於該交流訊號源的第二端之第二端、一電連接於該一次側繞組的第一端之第三端，及一接地的接地端。 Preferably, the AC signal source has a first end and a second The filter circuit has a first end electrically connected to the first end of the AC signal source, a second end, and a third end electrically connected to the second end of the AC signal source, the rectifying circuit having a first end electrically connected to the second end of the filter circuit, a second end electrically connected to the second end of the AC signal source, and a third end electrically connected to the first end of the primary side winding, And a grounded ground.
更佳地，該濾波電路包括一濾波電感及一濾波電容，該濾波電感具有一電連接於該濾波電路的第一端之第一端，及一電連接於該濾波電路的第二端之第二端，該濾波電容具有一電連接於該濾波電路的第二端之第一端，及一電連接於該濾波電路的第三端之第二端。 More preferably, the filter circuit includes a filter inductor and a filter capacitor, the filter inductor has a first end electrically connected to the first end of the filter circuit, and a second end electrically connected to the filter circuit The filter capacitor has a first end electrically connected to the second end of the filter circuit, and a second end electrically connected to the third end of the filter circuit.
更佳地，該整流電路包括一第一二極體、一第二二極體、一第三二極體及一第四二極體，該第一二極體的陽極及陰極分別電連接於該整流電路的第一端及第三端，該第二二極體的陽極及陰極分別電連接於該整流電路的接地端及第二端，該第三二極體的陽極及陰極分別電連接於該整流電路的第二端及第三端，該第四二極體的陽極及陰極分別電連接於該整流電路的接地端及第一端。 More preferably, the rectifier circuit includes a first diode, a second diode, a third diode, and a fourth diode. The anode and the cathode of the first diode are electrically connected to the second diode. The first end and the third end of the rectifier circuit are electrically connected to the ground end and the second end of the rectifier circuit, respectively, and the anode and the cathode of the third diode are respectively electrically connected The anode and the cathode of the fourth diode are electrically connected to the ground end and the first end of the rectifier circuit, respectively, at the second end and the third end of the rectifier circuit.
較佳地，該開關單元包括一電晶體，該電晶體的汲極、源極及閘極分別電連接於該開關單元的第一端、第二端及控制端。 Preferably, the switch unit includes a transistor, and the drain, the source and the gate of the transistor are electrically connected to the first end, the second end and the control end of the switch unit, respectively.
較佳地，該發光單元為一發光二極體單元，該發光單元包括複數個彼此並聯且分別電連接於該發光單元的第一端及第二端之間的發光二極體燈串。 Preferably, the light emitting unit is a light emitting diode unit, and the light emitting unit comprises a plurality of light emitting diode strings connected in parallel with each other and electrically connected between the first end and the second end of the light emitting unit.
本發明之功效在於藉由當該開關單元不導通時，對該儲能電容充電的電流與該交流電壓訊號同步，從而能使發光裝置具有高功率因數。此外，藉由該控制單元根據其供電端的電壓值及該開關單元的第二端的電壓調整該脈寬調變訊號，該發光裝置具定電壓、定電流回授控制機制。 The effect of the invention is that the current charged by the storage capacitor is synchronized with the alternating voltage signal when the switching unit is not conducting, so that the lighting device can have a high power factor. In addition, the control unit adjusts the pulse width modulation signal according to the voltage value of the power supply end and the voltage of the second end of the switch unit, and the light emitting device has a constant voltage and constant current feedback control mechanism.
100‧‧‧發光裝置 100‧‧‧Lighting device
VAC‧‧‧交流訊號源 V AC ‧‧‧Communication source
1‧‧‧整流電路 1‧‧‧Rectifier circuit
D1‧‧‧第一二極體 D 1 ‧‧‧First Diode
D2‧‧‧第二二極體 D 2 ‧‧‧Secondary
D3‧‧‧第三二極體 D 3 ‧‧‧third diode
D4‧‧‧第四二極體 D 4 ‧‧‧fourth dipole
2‧‧‧變壓器 2‧‧‧Transformers
N1‧‧‧一次側繞組 N 1 ‧‧‧ primary winding
N2‧‧‧二次側繞組 N 2 ‧‧‧ secondary winding
CS‧‧‧儲能電容 C S ‧‧‧ storage capacitor
3‧‧‧發光單元 3‧‧‧Lighting unit
31‧‧‧發光二極體燈串 31‧‧‧Lighting diode string
CR‧‧‧共振電容 C R ‧‧‧Resonance Capacitor
LR‧‧‧共振電感 L R ‧‧‧Resonance Inductance
4‧‧‧開關單元 4‧‧‧Switch unit
M‧‧‧電晶體 M‧‧‧O crystal
5‧‧‧控制單元 5‧‧‧Control unit
6‧‧‧濾波電路 6‧‧‧Filter circuit
LF‧‧‧濾波電感 L F ‧‧‧Filter Inductor
CF‧‧‧濾波電容 C F ‧‧‧Filter Capacitor
7‧‧‧回授單元 7‧‧‧Responsible unit
RS‧‧‧感測電阻 R S ‧‧‧resistance resistor
DR‧‧‧整流二極體 D R ‧‧‧Rected Diode
VN1、VN2‧‧‧電壓 V N1 , V N2 ‧‧‧ voltage
LS‧‧‧儲能電感 L S ‧‧‧ storage inductor
DF‧‧‧飛輪二極體 D F ‧‧‧Flywheel diode
本發明之其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是本發明發光裝置的第一較佳實施例的一電路圖；圖2是本發明發光裝置的第二較佳實施例的一電路圖；及圖3是本發明發光裝置的第三較佳實施例的一電路圖。 Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: Figure 1 is a circuit diagram of a first preferred embodiment of the light-emitting device of the present invention; A circuit diagram of a second preferred embodiment; and FIG. 3 is a circuit diagram of a third preferred embodiment of the illumination device of the present invention.
在本發明被詳細描述之前，應當注意在以下的說明內容中，類似的元件是以相同的編號來表示。 Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.
參閱圖1，是本發明發光裝置100之第一較佳實施例。發光裝置100適於接收一交流訊號源VAC產生的一交流電壓訊號。發光裝置100包含一整流電路1、一變壓器2、一儲能電容CS、一發光單元3、一共振電容CR、一共振電感LR、一開關單元4、一控制單元5、一回授單元7，及一濾波電路6。 Referring to Figure 1, there is shown a first preferred embodiment of a light emitting device 100 of the present invention. The illuminating device 100 is adapted to receive an AC voltage signal generated by an AC signal source V AC . The illuminating device 100 includes a rectifying circuit 1, a transformer 2, a storage capacitor C S , an illuminating unit 3, a resonant capacitor C R , a resonant inductor L R , a switching unit 4, a control unit 5, and a feedback Unit 7, and a filter circuit 6.
交流訊號源VAC具有一第一端及一第二端。濾 波電路6電連接於整流電路1及交流訊號源VAC之間。濾波電路6接收該交流電壓訊號並對該交流電壓訊號濾波，並將該濾波後的交流電壓訊號傳送給整流電路1。濾波電路6具有一電連接於交流訊號源VAC的第一端之第一端、一第二端，及一電連接於該交流訊號源VAC的第二端之第三端。在本實施例中，濾波電路6包括一濾波電感LF及一濾波電容CF。濾波電感LF具有一電連接於濾波電路6的第一端之第一端，及一電連接於濾波電路6的第二端之第二端。濾波電容CF具有一電連接於濾波電路6的第二端之第一端，及一電連接於濾波電路6的第三端之第二端。 The AC signal source V AC has a first end and a second end. The filter circuit 6 is electrically connected between the rectifier circuit 1 and the AC signal source V AC . The filter circuit 6 receives the AC voltage signal and filters the AC voltage signal, and transmits the filtered AC voltage signal to the rectifier circuit 1. The filter circuit 6 has a first end electrically connected to the first end of the AC signal source V AC , a second end, and a third end electrically connected to the second end of the AC signal source V AC . In this embodiment, the filter circuit 6 includes a filter inductor L F and a filter capacitor C F . The filter inductor L F has a first end electrically connected to the first end of the filter circuit 6 and a second end electrically connected to the second end of the filter circuit 6. The filter capacitor C F has a first end electrically connected to the second end of the filter circuit 6 and a second end electrically connected to the third end of the filter circuit 6.
整流電路1電連接於濾波電路6以接收該濾波後的交流電壓訊號，並對該濾波後的交流電壓訊號整流以產生一整流訊號。整流電路1具有一電連接於濾波電路6的第二端之第一端、一電連接於交流訊號源VAC的第二端之第二端、一電連接於變壓器2與發光單元3之第三端，及一接地的接地端。整流電路1包括一第一二極體D1、一第二二極體D2、一第三二極體D3及一第四二極體D4。第一二極體D1的陽極及陰極分別電連接於整流電路1的第一端及第三端。第二二極體D2的陽極及陰極分別電連接於整流電路1的接地端及第二端。第三二極體D3的陽極及陰極分別電連接於整流電路1的第二端及第三端。第四二極體D4的陽極及陰極分別電連接於整流電路1的接地端及第一端。 The rectifier circuit 1 is electrically connected to the filter circuit 6 to receive the filtered AC voltage signal, and rectifies the filtered AC voltage signal to generate a rectified signal. The rectifier circuit 1 has a first end electrically connected to the second end of the filter circuit 6, a second end electrically connected to the second end of the AC signal source V AC , and an electrical connection between the transformer 2 and the light emitting unit 3 Three ends, and a grounded ground. The rectifier circuit 1 includes a first diode D 1 , a second diode D 2 , a third diode D 3 and a fourth diode D 4 . The anode and the cathode of the first diode D 1 are electrically connected to the first end and the third end of the rectifier circuit 1, respectively. The anode and the cathode of the second diode D 2 are electrically connected to the ground end and the second end of the rectifier circuit 1, respectively. The anode and the cathode of the third diode D 3 are electrically connected to the second end and the third end of the rectifier circuit 1, respectively. The anode and the cathode of the fourth diode D 4 are electrically connected to the ground end and the first end of the rectifier circuit 1, respectively.
變壓器2包括一一次側繞組N1及一二次側繞組 N2。一次側繞組N1具有一電連接於整流電路1的第三端之第一端，及一第二端。二次側繞組N2具有一電連接於一次側繞組N1的第二端之第一端，及一第二端。儲能電容CS具有一電連接於一次側繞組N1的第二端之第一端，及一接地的第二端。 The transformer 2 includes a primary side winding N 1 and a secondary side winding N 2 . The primary side winding N 1 has a first end electrically connected to the third end of the rectifier circuit 1 and a second end. The secondary side winding N 2 has a first end electrically connected to the second end of the primary side winding N 1 and a second end. The storage capacitor C S has a first end electrically connected to the second end of the primary side winding N 1 and a second end connected to the ground.
發光單元3具有一電連接於一次側繞組N1的第一端之第一端、一第二端、一第三端及一第四端。本實施例的發光單元3係受高頻交流訊號驅動，發光單元3可以是交流式螢光燈(如日光燈)或交流式氣體放電燈(如交流式高強度氣體放電(High-intensity discharge；HID)燈)及與其相配合的高壓點燈電路。共振電容CR具有一電連接於發光單元3的第三端之第一端，及一電連接於發光單元3的第四端之第二端。共振電感LR具有一電連接於發光單元3的第二端之第一端，及一電連接於二次側繞組N2的第二端之第二端。 3 having a light-emitting unit is electrically connected to a first terminal of the primary winding N 1 of the first end, a second end, a third end and a fourth end. The light-emitting unit 3 of the embodiment is driven by a high-frequency alternating current signal, and the light-emitting unit 3 can be an AC fluorescent lamp (such as a fluorescent lamp) or an AC gas discharge lamp (such as an AC-type high-intensity discharge (HID). ))) and the high-voltage lighting circuit that works with it. The resonant capacitor C R has a first end electrically connected to the third end of the light emitting unit 3 and a second end electrically connected to the fourth end of the light emitting unit 3. The resonant inductor L R has a first end electrically connected to the second end of the light emitting unit 3 and a second end electrically connected to the second end of the secondary side winding N2.
開關單元4具有一電連接於二次側繞組N2的第二端之第一端、一第二端，及一接收一脈寬調變(pulse width modulation；PWM)訊號的控制端，且受該脈寬調變訊號控制使其第一端及第二端切換於導通與不導通之間。本實施例的開關單元4包括一電晶體M，該電晶體M的汲極(drain)、源極(source)及閘極(gate)分別電連接於開關單元4的第一端、第二端及控制端。 The switch unit 4 has a first end electrically connected to the second end of the secondary winding N 2 , a second end, and a control end receiving a pulse width modulation (PWM) signal, and is controlled by The pulse width modulation signal controls that the first end and the second end are switched between conducting and non-conducting. The switch unit 4 of the present embodiment includes a transistor M. The drain, the source and the gate of the transistor M are electrically connected to the first end and the second end of the switch unit 4, respectively. And the control terminal.
回授單元7具有一電連接於開關單元4的第二端之第一端、一第二端，及一接地的接地端。回授單元7 能感測開關單元4的第二端之電壓或電流訊號。本實施例的回授單元7包括一感測電阻RS。感測電阻RS具有一電連接於回授單元7的第一端及第二端之第一端，及一電連接於回授單元7的接地端的第二端。 The feedback unit 7 has a first end electrically connected to the second end of the switch unit 4, a second end, and a grounded ground. The feedback unit 7 can sense the voltage or current signal of the second end of the switch unit 4. The feedback unit 7 of this embodiment includes a sensing resistor R S . The sensing resistor R S has a first end electrically connected to the first end and the second end of the feedback unit 7 and a second end electrically connected to the ground end of the feedback unit 7.
控制單元5具有一電連接於儲能電容CS的第一端之供電端、一接地的接地端、一電連接於開關單元4的控制端之驅動端，及一電連接於回授單元7的第二端以接收回授單元7的感測結果之感測端。控制單元5能產生該脈寬調變(PWM)訊號並透過其驅動端輸出至開關單元4的控制端，從而控制開關單元4的第一端及第二端導通或不導通，即控制開關單元4導通或不導通。 The control unit 5 has a power supply end electrically connected to the first end of the storage capacitor C S , a grounded ground end, a drive end electrically connected to the control end of the switch unit 4 , and an electrical connection to the feedback unit 7 . The second end of the second end receives the sensing end of the sensing result of the feedback unit 7. The control unit 5 can generate the pulse width modulation (PWM) signal and output it to the control end of the switch unit 4 through its driving end, thereby controlling the first end and the second end of the switch unit 4 to be turned on or off, that is, the control switch unit 4 conduction or non-conduction.
當控制單元5控制開關單元4導通時，變壓器2的二次側繞組N2產生一電壓VN2，一次側繞組N1感應出一電壓VN1。VN1+VN2形成能驅動發光單元3的共振電壓源。其中由於共振電壓源VN1+VN2電壓值大於交流訊號源VAC的交流電壓訊號，因此變壓器2不接收交流訊號源VAC的交流電壓訊號。由於此共振電壓源VN1+VN2較現有技術用以驅動發光單元3的電壓高，因此能有效縮短點亮發光單元3的時間。 When the control unit 5 controls the switching unit 4 to be turned on, the secondary side winding N 2 of the transformer 2 generates a voltage V N2 , and the primary side winding N 1 induces a voltage V N1 . V N1 + V N2 forms a resonant voltage source capable of driving the light-emitting unit 3. Because the voltage value of the resonant voltage source V N1 + V N2 is greater than the AC voltage signal of the AC signal source V AC , the transformer 2 does not receive the AC voltage signal of the AC signal source V AC . Since the resonant voltage source V N1 +V N2 is higher than the voltage used to drive the light-emitting unit 3 in the prior art, the time for lighting the light-emitting unit 3 can be effectively shortened.
當控制單元5控制開關單元4不導通時，發光單元3同樣受反向之VN1+VN2的共振電壓源驅動，且一次側繞組N1所儲存的能量朝儲能電容CS釋放，且儲能電容CS同時受交流訊號源VAC充電，也就是說儲能電容CS受VAC+VN1的電壓充電。當交流電壓訊號低於儲能電容CS的 電壓時儲能電容CS亦能被充電，進而使交流電壓訊號與對儲能電容CS充電的電流同步，藉此能使發光裝置100具有高功率因數。此外，由於從一次側繞組N1流至濾波電路6的電流會由高頻電流降為與交流訊號源VAC相同的低頻電流，並與交流訊號源VAC同步，藉此亦能使發光裝置100具有高功率因數。 When the control unit 5 controls the switching unit 4 to be non-conducting, the lighting unit 3 is also driven by the resonant voltage source of the reverse V N1 + V N2 , and the energy stored in the primary winding N 1 is released toward the storage capacitor C S , and The storage capacitor C S is simultaneously charged by the AC signal source V AC , that is, the storage capacitor C S is charged by the voltage of V AC +V N1 . When the AC voltage signal is lower than the voltage of the storage capacitor C S C S storage capacitor can also be charged, and thus the alternating current voltage signal is synchronized with the energy storage capacitor C S is charged, whereby the light emitting device 100 can have a high Power factor. Further, since the N 1 from the primary winding current will flow to the filtering circuit 6 is reduced by the high frequency current signal source AC V AC same low frequency current and synchronized with the AC signal V AC source, whereby the light emitting device can also 100 has a high power factor.
值得一提的是，控制單元5能透過回授單元7感測開關單元4的第二端的電壓。當開關單元4的第二端的電壓大於等於一預設臨界值時，控制單元5控制開關單元4的第一端與第二端不導通直到該脈寬調變訊號的下一個週期開始。透過控制單元5與回授單元7的感測電阻RS的配合能控制流過開關單元4的電流的大小，從而產生穩定電流的效果。 It is worth mentioning that the control unit 5 can sense the voltage of the second end of the switching unit 4 through the feedback unit 7. When the voltage of the second end of the switch unit 4 is greater than or equal to a predetermined threshold, the control unit 5 controls the first end and the second end of the switch unit 4 to be non-conducting until the next cycle of the pulse width modulation signal begins. The magnitude of the current flowing through the switching unit 4 can be controlled by the cooperation of the control unit 5 and the sensing resistor R S of the feedback unit 7, thereby producing the effect of stabilizing the current.
此外，控制單元5能根據其供電端的電壓值調整該脈寬調變訊號的責任週期，藉此，透過電壓回授的機制穩定供電端的電壓值。 In addition, the control unit 5 can adjust the duty cycle of the pulse width modulation signal according to the voltage value of the power supply terminal, thereby stabilizing the voltage value of the power supply terminal through a voltage feedback mechanism.
參閱圖2，是本發明發光裝置100之第二較佳實施例。第二較佳實施例與第一較佳實施例相近，主要的差異說明如下。 Referring to Figure 2, there is shown a second preferred embodiment of the illumination device 100 of the present invention. The second preferred embodiment is similar to the first preferred embodiment, and the main differences are explained below.
本實施例的發光裝置100不包含共振電容CR及共振電感LR。在本實施例中，發光單元3的第一端電連接於二次側繞組N2的第二端，發光單元3的第二端電連接於開關單元4的第一端。本實施例的發光單元3係受直流電壓驅動，其為一發光二極體單元。發光單元3包括複數個 彼此並聯且分別電連接於發光單元3的第一端及第二端之間的發光二極體燈串31。各發光二極體燈串31具有複數個彼此串接的發光二極體。發光裝置100還包含一整流二極體DR，其陽極電連接於發光單元3的第二端，其陰極電連接於二次側繞組N2的第一端。 The light-emitting device 100 of the present embodiment does not include the resonant capacitor C R and the resonant inductor L R . In this embodiment, the first end of the light emitting unit 3 is electrically connected to the second end of the secondary side winding N 2 , and the second end of the light emitting unit 3 is electrically connected to the first end of the switch unit 4 . The light-emitting unit 3 of the present embodiment is driven by a direct current voltage, which is a light-emitting diode unit. The light emitting unit 3 includes a plurality of light emitting diode strings 31 connected in parallel with each other and electrically connected between the first end and the second end of the light emitting unit 3, respectively. Each of the light-emitting diode strings 31 has a plurality of light-emitting diodes connected in series with each other. The illuminating device 100 further includes a rectifying diode D R having an anode electrically connected to the second end of the illuminating unit 3 and a cathode electrically connected to the first end of the secondary winding N 2 .
參閱圖3，是本發明發光裝置100之第三較佳實施例。第三較佳實施例與第二較佳實施例相近，主要的差異說明如下。 Referring to Figure 3, a third preferred embodiment of the illumination device 100 of the present invention is shown. The third preferred embodiment is similar to the second preferred embodiment, and the main differences are explained below.
本實施例的發光裝置100不包含整流二極體DR。發光裝置100還包含一儲能電感LS及一飛輪二極體DF。儲能電感LS具有一電連接於二次側繞組N2的第二端之第一端，及一第二端。發光單元3的第一端電連接於儲能電感LS的第二端，發光單元3的第二端電連接於開關單元4的第一端。飛輪二極體DF的陽極電連接於發光單元3的第二端，其陰極電連接於儲能電感LS的第一端。透過儲能電感LS及飛輪二極體DF的相互配合能減少流經發光單元3的電流之漣波成分。 The light-emitting device 100 of the present embodiment does not include the rectifying diode D R . The light emitting device 100 further includes a storage inductor L S and a flywheel diode D F . The energy storage inductor L S has a first end electrically connected to the second end of the secondary side winding N 2 and a second end. The first end of the light emitting unit 3 is electrically connected to the second end of the storage inductor L S , and the second end of the light emitting unit 3 is electrically connected to the first end of the switch unit 4 . The anode of the flywheel diode D F is electrically connected to the second end of the light emitting unit 3, and the cathode thereof is electrically connected to the first end of the energy storage inductor L S . The chopping component of the current flowing through the light-emitting unit 3 can be reduced by the mutual cooperation of the energy storage inductor L S and the flywheel diode D F .
綜上所述，本發明發光裝置100藉由控制單元5、開關單元4、變壓器2、整流電路1、濾波電路6及儲能電容CS的相互配合，使對該儲能電容CS充電的電流與該交流電壓訊號同步，從而能使發光裝置100具有高功率因數，再者，透過控制單元5與回授單元7的感測電阻RS的相互配合，能有效產生穩定發光單元3上的電流的效果，此外，藉由控制單元根據其供電端的電壓值調整該脈寬調 變訊號的責任週期，能產生電壓回授機制以穩定供電端的電壓值，故確實能達成本發明之目的。 In summary, the present invention is a light emitting device 100 by the control unit 5, the switching unit 4, a transformer 2, a rectifier circuit, a filter circuit 6 and cooperating storage capacitor C S, and the charging of the storage capacitor C S The current is synchronized with the AC voltage signal, so that the light-emitting device 100 has a high power factor. Furthermore, the interaction between the control unit 5 and the sensing resistor R S of the feedback unit 7 can effectively generate the stable light-emitting unit 3. The effect of the current, in addition, by the control unit adjusting the duty cycle of the pulse width modulation signal according to the voltage value of the power supply terminal, a voltage feedback mechanism can be generated to stabilize the voltage value of the power supply terminal, so the object of the present invention can be achieved.
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。 The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.
100‧‧‧發光裝置 100‧‧‧Lighting device
VAC‧‧‧交流訊號源 V AC ‧‧‧Communication source
1‧‧‧整流電路 1‧‧‧Rectifier circuit
D1‧‧‧第一二極體 D 1 ‧‧‧First Diode
D2‧‧‧第二二極體 D 2 ‧‧‧Secondary
D3‧‧‧第三二極體 D 3 ‧‧‧third diode
D4‧‧‧第四二極體 D 4 ‧‧‧fourth dipole
2‧‧‧變壓器 2‧‧‧Transformers
N1‧‧‧一次側繞組 N 1 ‧‧‧ primary winding
N2‧‧‧二次側繞組 N 2 ‧‧‧ secondary winding
CS‧‧‧儲能電容 C S ‧‧‧ storage capacitor
3‧‧‧發光單元 3‧‧‧Lighting unit
CR‧‧‧共振電容 C R ‧‧‧Resonance Capacitor
LR‧‧‧共振電感 L R ‧‧‧Resonance Inductance
4‧‧‧開關單元 4‧‧‧Switch unit
M‧‧‧電晶體 M‧‧‧O crystal
5‧‧‧控制單元 5‧‧‧Control unit
6‧‧‧濾波電路 6‧‧‧Filter circuit
LF‧‧‧濾波電感 L F ‧‧‧Filter Inductor
CF‧‧‧濾波電容 C F ‧‧‧Filter Capacitor
7‧‧‧回授單元 7‧‧‧Responsible unit
RS‧‧‧感測電阻 R S ‧‧‧resistance resistor
VN1、VN2‧‧‧電壓 V N1 , V N2 ‧‧‧ voltage
Claims (23)
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