TWI435527B - Light-emitting diode with dimming function - Google Patents
Light-emitting diode with dimming function Download PDFInfo
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本發明係關於一種發光二極體燈具電源供應器，尤指一種可在單級電源轉換電路(AC/DC)架構下提供調光功能的發光二極體燈具電源供應器。The invention relates to a power supply for a light-emitting diode lamp, in particular to a light-emitting diode lamp power supply capable of providing a dimming function under a single-stage power conversion circuit (AC/DC) architecture.
如第三圖所示，係一種已知的發光二極體燈具電源供應器，其包括一交直流(AC/DC)電源轉換器(70)及一直流對直流(DC/DC)轉換器(80)；其中：該交直流電源轉換器(70)包括一變壓器T，變壓器T的一次側分設一濾波電路(71)、一整流電路(72)、一功率開關(73)及一脈寬調變控制器(74)，交流市電經由濾波電路(71)及整流電路(72)作濾波整流為直流電源後送至變壓器T一次側，又變壓器T的一次側係與功率開關(73)連接，其二次側則透過一輸出電路(75)與該直流對直流轉換器(80)連接，而前述功率開關(73)係受脈寬調變控制器(74)控制以決定變壓器T一次側的導通週期，從而由二次側的輸出電路(75)輸出直流電壓，又輸出電路(75)的輸出電流將回授至脈寬調變控制器(74)，由脈寬調變控制器(74)調整功率開關(73)的開關週期，以穩定輸出電壓之目的。As shown in the third figure, there is a known power supply for a light-emitting diode lamp, which comprises an AC/DC power converter (70) and a DC-DC converter ( 80); wherein: the AC/DC power converter (70) includes a transformer T. The primary side of the transformer T is provided with a filter circuit (71), a rectifier circuit (72), a power switch (73), and a pulse width. The modulation controller (74), the AC mains is filtered and rectified into a DC power supply via a filter circuit (71) and a rectifier circuit (72), and then sent to the primary side of the transformer T, and the primary side of the transformer T is connected to the power switch (73). The secondary side is connected to the DC-DC converter (80) through an output circuit (75), and the power switch (73) is controlled by the pulse width modulation controller (74) to determine the primary side of the transformer T. The turn-on period, so that the output voltage (75) of the secondary side outputs a DC voltage, and the output current of the output circuit (75) is fed back to the pulse width modulation controller (74) by the pulse width modulation controller ( 74) Adjust the switching period of the power switch (73) to stabilize the output voltage.
由於發光二極體燈具的輸出亮度和工作電源的電流強度有關，因此必須進一步採用直流對直流轉換器(80)進行穩流。該直流對直流轉換器(80)含有內建脈寬調變(PWM)控制器的控制單元(81)，以進行直流對直流轉換；又前述控制單元(81)進一步提供一調光控制接腳(DIM)，以接受外部送入的PWM形式調光訊號，透過內部邏輯閘的控制，改變輸出至發光二極體燈具的電流大小，以調整發光二極體燈具的亮度。Since the output brightness of the LED lamp is related to the current intensity of the operating power supply, it is necessary to further stabilize the DC-to-DC converter (80). The DC-to-DC converter (80) includes a control unit (81) with a built-in pulse width modulation (PWM) controller for DC-to-DC conversion; and the aforementioned control unit (81) further provides a dimming control pin. (DIM), in order to accept the PWM mode dimming signal sent by externally, through the control of the internal logic gate, change the current output to the LED lamp to adjust the brightness of the LED lamp.
前述發光二極體燈具電源供應器提供了交流市電供電及調光等功能，為了滿足前述功能，必須採用兩級電路，前一級作交直流轉換，後一級作穩流處理及調光功能，但兩級電路都會有能量損耗，無論從整體效率或成本來看，都有可待檢討的空間。The power supply of the above-mentioned light-emitting diode lamp provides functions such as AC mains power supply and dimming. In order to meet the foregoing functions, a two-stage circuit must be used, the first stage is used for AC-DC conversion, and the latter stage is used for steady current processing and dimming function, but Both-stage circuits have energy losses, and there is room for review, both in terms of overall efficiency and cost.
又請參閱第四圖所示，揭示有另一種發光二極體燈具電源供應器，其可在單級架構下達成穩定輸出電流之目的，該發光二極體燈具電源供應器包括一變壓器T，變壓器T的一次側分設一濾波電路(91)、一整流電路(92)、一功率開關(93)、一功率因數校正電路(94)及一內建脈寬調變控制器的控制單元(90)，交流市電經由濾波整流及功率因數校正後將直流電源後送至變壓器T一次側，又變壓器T的一次側係與功率開關(93)連接，其二次側則透過一輸出電路(95)與發光二極體燈具(圖中未示)連接，而前述功率開關(93)係受控制單元(90)控制以決定變壓器T一次側的導通週期，從而由二次側的輸出電路(95)輸出直流電壓，又輸出電路(95)的輸出端係透過一穩流穩壓(CC/CV)控制器(96)、一光耦合器(97)回授至控制單元(90)，由控制單元(90)調整功率開關(93)的開關週期，以穩定輸出電壓及電流。Please also refer to the fourth figure, which discloses another power supply device for a light-emitting diode lamp, which can achieve a stable output current under a single-stage architecture. The light-emitting diode lamp power supply includes a transformer T. The primary side of the transformer T is provided with a filter circuit (91), a rectifier circuit (92), a power switch (93), a power factor correction circuit (94) and a control unit of a built-in pulse width modulation controller ( 90) After the AC mains is filtered and rectified and power factor corrected, the DC power is sent to the primary side of the transformer T, and the primary side of the transformer T is connected to the power switch (93), and the secondary side is transmitted through an output circuit (95). ) is connected to a light-emitting diode lamp (not shown), and the power switch (93) is controlled by the control unit (90) to determine the conduction period of the primary side of the transformer T, thereby being outputted by the secondary side (95). The output DC voltage is outputted to the control unit (90) through a steady current regulator (CC/CV) controller (96) and an optocoupler (97). The unit (90) adjusts the switching period of the power switch (93) to stabilize the output voltage and power .
由於前述發光二極體燈具電源供應器的輸出電路(95)透過穩流穩壓控制器(96)回授至控制單元(90)，使控制單元(90)調節功率開關(93)的開關週期，而在單級轉換電路架構下提供穩壓穩流功能。然而該等電源供應器依然不具調光功能，無法滿足目前發光二極體燈具漸被要求具備調光功能的要求。The output circuit (95) of the power supply of the light-emitting diode lamp is fed back to the control unit (90) through the steady-state voltage regulator controller (96), so that the control unit (90) adjusts the switching period of the power switch (93). The voltage regulation and current function is provided under the single-stage conversion circuit architecture. However, these power supplies still do not have a dimming function, and cannot meet the requirements that the current LED lamp is gradually required to have a dimming function.
由上述可知，既有發光二極體燈具電源供應器仍有未盡周延實用之處，故有待進一步檢討，並謀求可行的解決方案。It can be seen from the above that there are still some applications for the power supply of the LED lamp, and it is still necessary to further review and seek a feasible solution.
因此，本發明主要目的在提供一種具調光功能的發光二極體燈具電源供應器，其可在單級電源轉換電路(AC/DC)的架構下，達成調光及穩流目的。Therefore, the main object of the present invention is to provide a power supply for a light-emitting diode lamp with a dimming function, which can achieve dimming and steady current under the structure of a single-stage power conversion circuit (AC/DC).
為達成前述目的採取的主要技術手段係令前述前述具調光功能的發光二極體燈具電源供應器包括有：一交直流電源轉換模組，主要係於一變壓器的一次側分設一濾波電路、一整流電路、一功率開關、一功率因數校正電路及一內建脈寬調變控制器的控制單元；其中，該功率開關係受控制單元控制以決定變壓器一次側的導通週期；又變壓器的二次側設有一輸出電路，該輸出電路又透過一穩流穩壓控制器與前述控制單元的回授端連接；一調光模組，具有一調光訊號輸入端及一補償電壓輸出端，該補償電壓輸出端係連接至穩流穩壓控制器的回授電流輸入端；前述交直流電源轉換模組是以其輸出電路的輸出端與一發光二極體燈具連接，該調光模組的調光訊號輸入端係與一調光器連接，以接受該調光器輸入的PWM形式調光訊號，當調光模組收到一調光訊號時，將在電壓輸出端產生一對應的補償電壓，並施加在穩流穩壓控制器回授電流輸入端上，藉此改變穩流穩壓控制器自輸出電路取得的回授電流大小，該回授電流經回授至交直流電源轉換模組的控制單元，隨即透過調整功率開關的導通週期，以調整輸出電路輸出至發光二極體燈具的輸出電流，由於發光二極體燈具的亮度與電流強度相關，當交直流電源轉換模組的輸出電流改變，發光二極體燈具的亮度亦同時改變，如此一來，本發明僅採用單級電源轉換電路架構，即兼可達成穩流及調光之目的，就整體效率而言已大幅提升。The main technical means for achieving the foregoing objective is that the foregoing power supply device for the light-emitting diode lamp with dimming function comprises: an AC-DC power conversion module, which is mainly provided with a filter circuit on the primary side of a transformer. a rectifier circuit, a power switch, a power factor correction circuit, and a control unit of a built-in pulse width modulation controller; wherein the power on relationship is controlled by the control unit to determine a conduction period of the primary side of the transformer; The output circuit is connected to the feedback end of the control unit through a steady current regulator controller; the dimming module has a dimming signal input end and a compensating voltage output end. The compensation voltage output end is connected to the feedback current input end of the steady current voltage regulator controller; the AC/DC power conversion module is connected with an LED output lamp at an output end of the output circuit thereof, the dimming module The dimming signal input end is connected to a dimmer to receive the PWM form dimming signal input by the dimmer, and when the dimming module receives a dimming signal, The voltage output terminal generates a corresponding compensation voltage, and is applied to the steady current regulator controller feedback current input terminal, thereby changing the feedback current obtained by the steady current regulator controller from the output circuit, and the feedback current is The control unit that is fed back to the AC/DC power conversion module immediately adjusts the on-period of the power switch to adjust the output current of the output circuit output to the LED lamp. Since the brightness of the LED lamp is related to the current intensity, The output current of the AC/DC power conversion module is changed, and the brightness of the LED lamp is also changed at the same time. Therefore, the invention only adopts a single-stage power conversion circuit architecture, that is, the purpose of achieving steady current and dimming can be achieved. Overall efficiency has increased significantly.
如第一圖所示，本發明包括一交直流電源轉換模組(10)及一調光模組(20)，該交直流電源轉換模組(10)的輸出端是與一發光二極體燈具(30)連接，該調光模組(20)的輸入端則與一無極性調光器(40)連接，以接受該調光器輸入的PWM形式調光訊號；其中：該交直流電源轉換模組(10)主要係於一變壓器T的一次側分設一濾波電路(11)、一整流電路(12)、一功率開關(13)、一功率因數校正電路(14)及一內建脈寬調變控制器的控制單元(15)；其中，該功率開關(13)係受控制單元(15)控制以決定變壓器T一次側的導通週期；又變壓器T的二次側設有一輸出電路(16)，該輸出電路(16)的輸出端分別連接有數個電阻RSENSE 、R2、R3~R5，其中電阻RSENSE 、R2係構成一輸出電流檢出迴路，該電阻R2的輸出節點係連接至一穩流穩壓控制器(17)。As shown in the first figure, the present invention includes an AC/DC power conversion module (10) and a dimming module (20). The output end of the AC/DC power conversion module (10) is coupled to a light emitting diode. The lamp (30) is connected, and the input end of the dimming module (20) is connected to a polarity-free dimmer (40) to receive the PWM form dimming signal input by the dimmer; wherein: the AC/DC power supply The conversion module (10) is mainly provided with a filter circuit (11), a rectifier circuit (12), a power switch (13), a power factor correction circuit (14) and a built-in side on a primary side of a transformer T. a control unit (15) of the pulse width modulation controller; wherein the power switch (13) is controlled by the control unit (15) to determine a conduction period of the primary side of the transformer T; and an output circuit is provided on the secondary side of the transformer T (16), the output end of the output circuit (16) is connected with a plurality of resistors R SENSE , R2 , R3 R R5 , wherein the resistors R SENSE and R2 form an output current detection loop, and the output node of the resistor R2 is connected. To a steady current regulator controller (17).
該穩流穩壓控制器(17)內具有兩組OP1,OP2，分別執行穩流穩壓控制，其中一OP2係執行穩壓控制，其正端輸入連接一稽納二極體，以提供一2.5V的參考電壓，其負端透過分壓電阻R7,R8自輸出電路(16)輸出端的電阻R3上檢出一輸出電壓Vout；而另一OP1係執行穩流控制，其正端係一參考電壓端，本實施例中，該參考電壓端上的參考電壓Vref’係由OP2正端提供2.5V的參考電壓Vref經電阻R4、R5分壓後所供應，其負端係構成一回授電流輸入端(A)，並與前述輸出電流檢出迴路連接；再者，兩OP1,OP2的輸出端係共同透過一光耦合器(18)與控制單元(15)的回授端連接，藉以將自輸出電路(16)檢出的輸出電流、輸出電壓回授至控制單元(15)，以調節輸出電流/電壓，達到穩流與穩壓之目的。The steady current regulator controller (17) has two sets of OP1 and OP2, respectively performing steady current voltage stabilization control, wherein an OP2 system performs voltage regulation control, and a positive terminal input is connected with a sigma diode to provide a The reference voltage of 2.5V, the negative terminal passes through the voltage dividing resistor R7, R8 detects an output voltage Vout from the resistor R3 at the output end of the output circuit (16); and the other OP1 performs steady current control, and the positive terminal is a reference In the present embodiment, the reference voltage Vref' on the reference voltage terminal is supplied by the reference voltage Vref of 2.5V provided by the positive terminal of the OP2, and is divided by the resistors R4 and R5, and the negative terminal thereof constitutes a feedback current. The input terminal (A) is connected to the output current detecting circuit; in addition, the outputs of the two OP1 and OP2 are commonly connected to the feedback terminal of the control unit (15) through an optical coupler (18), thereby The output current and output voltage detected from the output circuit (16) are fed back to the control unit (15) to regulate the output current/voltage to achieve steady current and voltage regulation.
該調光模組(20)具有一調光訊號輸入端(23)及一補償電壓輸出端(24)，其中，調光訊號輸入端(23)係與一外部的無極性調光器(40)連接，以接受無極性調光器(40)所送入脈寬調變(PWM)形式的調光訊號，又該補償電壓輸出端(24)係連接至穩流穩壓控制器(17)的回授電流輸入端(A)上，於本實施例中，該補償電壓輸出端(24)產生的補償電壓VC6係透過分壓電阻R1,R2分壓後施加在穩流穩壓控制器(17)的回授電流輸入端(A)上，藉以視無極性調光器(40)送出的調光訊號產生一對應的補償電壓VC6，進而使控制單元(15)調整輸出電路(16)的輸出電流，從而改變發光二極體燈具的亮度，進而達到調光的目的。The dimming module (20) has a dimming signal input end (23) and a compensating voltage output end (24), wherein the dimming signal input end (23) is coupled to an external polarity-free dimmer (40). ) is connected to receive a dimming signal in the form of a pulse width modulation (PWM) fed by the polarity-free dimmer (40), and the compensation voltage output terminal (24) is connected to the steady current regulator controller (17) In the feedback current input terminal (A), in the embodiment, the compensation voltage VC6 generated by the compensation voltage output terminal (24) is transmitted through the voltage dividing resistor R1, R2 and then applied to the steady current regulator controller ( 17) is fed back to the current input terminal (A), whereby the dimming signal sent by the polarity-free dimmer (40) generates a corresponding compensation voltage VC6, so that the control unit (15) adjusts the output circuit (16). The output current is used to change the brightness of the light-emitting diode lamp, thereby achieving the purpose of dimming.
前述調光模組(20)的具體構造及工作原理謹進一步詳述如后：於本實施例中，該調光模組(20)包括一整流電路(21)、一驅動電路(22)及一充放電容C6，該整流電路(21)係由一橋式整流器構成，其輸入端係與無極性調光器(40)連接，其輸出端係連接至驅動電路(22)，本實施例中，該驅動電路(22)的驅動電源端P係與前述穩流穩壓控制器(17)其中一OP2的正端取得2.5V的工作電源，藉此可無須再另外提供一輔助電源。又驅動電路(22)係由一NPN電晶體Q18、一PNP電晶體Q17組成，兩電晶體Q18,Q17的基極係分別透過一電阻R45、R53連接至整流電路(21)的輸出端，NPN電晶體Q18射極與PNP電晶體Q17集極的連接節點則連接至充放電容C6，又NPN電晶體Q18、PNP電晶體Q17係分別操作在飽和區與截止區，以決定充放電容C6的充放電，當NPN電晶體Q18導通時，充放電容C6的電容電壓VC6上升，又當PNP電晶體Q17導通時，充放電容C6的電容電壓VC6則下降，藉此，該充放電容C6的電容電壓VC6可隨PWM調光訊號之週期(duty)寬度所決定，平均值在0~2.5V(忽略BJT之VCE)。The specific configuration and working principle of the aforementioned dimming module (20) are further described in detail. In this embodiment, the dimming module (20) includes a rectifying circuit (21), a driving circuit (22), and a charging and discharging capacitor C6, the rectifying circuit (21) is composed of a bridge rectifier, the input end of which is connected to the non-polarity dimmer (40), and the output end thereof is connected to the driving circuit (22), in this embodiment The driving power terminal P of the driving circuit (22) and the positive terminal of one of the OP2 voltage regulator controllers (17) obtain a working power of 2.5V, thereby eliminating the need to provide an auxiliary power source. The driving circuit (22) is composed of an NPN transistor Q18 and a PNP transistor Q17. The bases of the two transistors Q18 and Q17 are respectively connected to the output end of the rectifier circuit (21) through a resistor R45 and R53, NPN. The connection node of the transistor Q18 emitter and the PNP transistor Q17 collector is connected to the charging and discharging capacitor C6, and the NPN transistor Q18 and the PNP transistor Q17 are respectively operated in the saturation region and the cutoff region to determine the charging and discharging capacitance C6. During charging and discharging, when the NPN transistor Q18 is turned on, the capacitor voltage VC6 of the charging and discharging capacitor C6 rises, and when the PNP transistor Q17 is turned on, the capacitor voltage VC6 of the charging and discharging capacitor C6 decreases, whereby the charging and discharging capacitor C6 The capacitor voltage VC6 can be determined by the duty width of the PWM dimming signal, and the average value is 0~2.5V (ignoring the VCE of BJT).
當PWM調光訊號的Duty=0，亦即未執行調光功能，該穩流穩壓控制器(17)回授電流輸入端(A)上的電壓(VSENSE )由輸出電流I0 *電阻RSENSE 決定，由於穩流穩壓控制器(17)內部一OP1係以負端與前述回授電流輸入端(A)連接，其正端則透過分壓電阻R4、R5取得一參考電壓Vref’，由於OP1負端的穩態值必須等於正端之參考電壓，藉此達到穩定電流之功能。When the PWM dimming signal has Duty=0, that is, the dimming function is not performed, the steady current regulator controller (17) returns the voltage on the current input terminal (A) (V SENSE ) by the output current I 0 * resistor R SENSE determines that since the OP1 system of the steady current regulator controller (17) is connected to the feedback current input terminal (A) with a negative terminal, the positive terminal thereof obtains a reference voltage Vref through the voltage dividing resistors R4 and R5. Since the steady state value of the negative terminal of OP1 must be equal to the reference voltage of the positive terminal, the function of stabilizing current is achieved.
當PWM調光訊號的Duty不等於0，故將執行調光功能，前述執行穩定電流的OP1正端仍透過分壓電阻R4、R5取得參考電壓Vref’，由於OP1負端電壓VSENSE 之穩態值必須等於正端的參考電壓Vref’，而原本OP1負端的電壓VSENSE 為Io*RSENSE ，但在PWM調光訊號加入後，驅動電路(22)導通後使充放電容C6充放電，故有一電壓(VC6(R2/(R1+R2))施加在OP1的負端上，此時OP1的負端電壓即為When the duty of the PWM dimming signal is not equal to 0, the dimming function will be performed. The positive terminal of the OP1 that performs the stable current still obtains the reference voltage Vref' through the voltage dividing resistors R4 and R5, due to the steady state of the negative voltage V SENSE of the OP1. The value must be equal to the reference voltage Vref' of the positive terminal, and the voltage V SENSE of the negative terminal of the original OP1 is Io*R SENSE , but after the PWM dimming signal is added, the driving circuit (22) is turned on to charge and discharge the charging and discharging capacitor C6, so there is a The voltage (VC6(R2/(R1+R2)) is applied to the negative terminal of OP1. At this time, the negative voltage of OP1 is
V’SENSE =VC6(R2/(R1+R2))+Io*RSENSE ，且V’SENSE >VSENSE 。V' SENSE = VC6(R2/(R1+R2))+Io*R SENSE and V' SENSE >V SENSE .
在前述狀況下，穩流穩壓控制器(17)回授至控制單元(15)的訊號將使控制單元(15)判斷輸出電流Io為過高的狀態，因而將調降輸出電路(16)的輸出電流(透過改變輸出電壓)，進而調整了發光二極體燈具(30)的亮度，由於調光模組(20)輸出的補償電壓值(即VC6)係根據PWM調光訊號的週期大小而有不同，故輸出的補償電壓值不同，即可將發光二極體燈具(30)調整至不同亮度。利用前述設計，本發明可以在單級的交直流電源轉換電路架構下兼具穩流與調光功能。Under the foregoing conditions, the signal fed back to the control unit (15) by the steady current regulator controller (17) will cause the control unit (15) to judge that the output current Io is too high, thereby lowering the output circuit (16). The output current (by changing the output voltage), and then adjust the brightness of the LED (30), because the compensation voltage value (ie VC6) output by the dimming module (20) is based on the period of the PWM dimming signal However, if the output compensation voltage is different, the LED (30) can be adjusted to different brightness. With the foregoing design, the present invention can have both steady current and dimming functions under a single-stage AC/DC power conversion circuit architecture.
再者，在前述實施例中，調光模組(20)中驅動電路(22)的工作電源、穩流穩壓控制器(17)中穩流用OP1的參考電壓Vref’均是來自穩流穩壓控制器(17)中穩壓用OP2的參考電壓端所供應，如是狀況下，即無須基於前述工作電源及參考電壓的需求而另外提供一輔助電源，故具有降低成本、簡化電路構造的效果。另外，當穩流穩壓控制器(17)中穩壓用OP2的參考電壓端所供應的參考電壓較低時，則無須經過電阻R4,R5分壓，即可供應參考電壓Vref給OP1；另一方面，補償電壓輸出端(24)的補償電壓亦可無須經過電阻R1,R2分壓，即可直接施加在穩流穩壓控制器(17)的回授電流輸入端(A)上。Furthermore, in the foregoing embodiment, the operating voltage of the driving circuit (22) in the dimming module (20) and the reference voltage Vref' of the steady current using the OP1 in the steady-state voltage regulator controller (17) are all from steady flow stability. In the voltage controller (17), the voltage regulator is supplied with the reference voltage terminal of the OP2. If the condition is not required, the auxiliary power supply is additionally provided based on the requirements of the working power supply and the reference voltage, so that the cost is reduced and the circuit configuration is simplified. . In addition, when the reference voltage supplied by the reference voltage terminal of the voltage regulator OP2 in the steady current regulator controller (17) is low, the reference voltage Vref can be supplied to the OP1 without dividing the resistor R4 and R5; On the one hand, the compensation voltage of the compensation voltage output terminal (24) can also be directly applied to the feedback current input terminal (A) of the steady current regulator controller (17) without being divided by the resistors R1 and R2.
又請參閱第二圖所示，係本發明又一較佳實施例，其整體架構與前一實施例大致相同，不同處在於：該調光模組(20)的補償電壓輸出端上進一步並聯設有一類比式有極性調光器(50)，如此一來，本發明的發光二極體燈具電源供應器除可接受無極性的調光訊號執行調光功能外，亦可接受類比式且有極性的調光訊號執行調光。Please refer to the second embodiment, which is another preferred embodiment of the present invention. The overall structure is substantially the same as that of the previous embodiment, except that the compensation voltage output terminal of the dimming module (20) is further connected in parallel. A type of polar dimmer (50) is provided. In this way, the power supply of the LED lamp of the present invention can be analogized and can be analogized except that the dimming signal can be dimmed. The dimming signal of the polarity performs dimming.
(10)．．．交直流電源轉換模組(10). . . AC and DC power conversion module
(11)．．．濾波電路(11). . . Filter circuit
(12)．．．整流電路(12). . . Rectifier circuit
(13)．．．功率開關(13). . . Power switch
(14)．．．功率因數校正電路(14). . . Power factor correction circuit
(15)．．．控制單元(15). . . control unit
(16)．．．輸出電路(16). . . Output circuit
(17)．．．穩流穩壓控制器(17). . . Steady current regulator
(18)．．．光耦合器(18). . . Optocoupler
(20)．．．調光模組(20). . . Dimming module
(21)．．．整流電路(twenty one). . . Rectifier circuit
(22)．．．驅動電路(twenty two). . . Drive circuit
(23)．．．調光訊號輸入端(twenty three). . . Dimming signal input
(24)．．．補償電壓輸出端(twenty four). . . Compensation voltage output
(30)．．．發光二極體燈具(30). . . Light-emitting diode lamp
(40)．．．無極性調光器(40). . . Non-polar dimmer
(50)．．．類比式有極性調光器(50). . . Analog type polar dimmer
(70)．．．交直流電源轉換器(70). . . AC and DC power converter
(71)．．．濾波電路(71). . . Filter circuit
(72)．．．整流電路(72). . . Rectifier circuit
(73)．．．功率開關(73). . . Power switch
(74)．．．脈寬調變控制器(74). . . Pulse width modulation controller
(75)．．．輸出電路(75). . . Output circuit
(80)．．．直流對直流轉換器(80). . . DC to DC converter
(81)．．．控制單元(81). . . control unit
(90)．．．控制單元(90). . . control unit
(91)．．．濾波電路(91). . . Filter circuit
(92)．．．整流電路(92). . . Rectifier circuit
(93)．．．功率開關(93). . . Power switch
(94)．．．功率因數校正電路(94). . . Power factor correction circuit
(95)．．．輸出電路(95). . . Output circuit
(96)．．．穩流穩壓控制器(96). . . Steady current regulator
(97)．．．光耦合器(97). . . Optocoupler
第一圖：係本發明一較佳實施例的詳細電路圖。First Figure: A detailed circuit diagram of a preferred embodiment of the present invention.
第二圖：係本發明又一較佳實施例的詳細電路圖。Second Figure: A detailed circuit diagram of still another preferred embodiment of the present invention.
第三圖：既有兩級式發光二極體燈具電源供應器的詳細電路圖。Figure 3: Detailed circuit diagram of a two-stage LED power supply.
第四圖：既有單級式發光二極體燈具電源供應器的詳細電路圖。Figure 4: Detailed circuit diagram of the power supply for single-stage LED light fixtures.
(10)．．．交直流電源轉換模組(10). . . AC and DC power conversion module
(11)．．．濾波電路(11). . . Filter circuit
(12)．．．整流電路(12). . . Rectifier circuit
(13)．．．功率開關(13). . . Power switch
(14)．．．功率因數校正電路(14). . . Power factor correction circuit
(15)．．．控制單元(15). . . control unit
(16)．．．輸出電路(16). . . Output circuit
(17)．．．穩流穩壓控制器(17). . . Steady current regulator
(18)．．．光耦合器(18). . . Optocoupler
(20)．．．調光模組(20). . . Dimming module
(21)．．．整流電路(twenty one). . . Rectifier circuit
(22)．．．驅動電路(twenty two). . . Drive circuit
(23)．．．調光訊號輸入端(twenty three). . . Dimming signal input
(24)．．．補償電壓輸出端(twenty four). . . Compensation voltage output
(30)．．．發光二極體燈具(30). . . Light-emitting diode lamp
(40)．．．無極性調光器(40). . . Non-polar dimmer
Claims (9)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW099111045A TWI435527B (en) | 2010-04-09 | 2010-04-09 | Light-emitting diode with dimming function |
| CN201020174936.3U CN201682668U (en) | 2010-04-09 | 2010-04-26 | Power supply with light adjusting function for LED (light-emitting diode) lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW099111045A TWI435527B (en) | 2010-04-09 | 2010-04-09 | Light-emitting diode with dimming function |
| CN201020174936.3U CN201682668U (en) | 2010-04-09 | 2010-04-26 | Power supply with light adjusting function for LED (light-emitting diode) lamp |
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| TW201136126A TW201136126A (en) | 2011-10-16 |
| TWI435527B true TWI435527B (en) | 2014-04-21 |
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| US9030122B2 (en) | 2008-12-12 | 2015-05-12 | O2Micro, Inc. | Circuits and methods for driving LED light sources |
| US9386653B2 (en) | 2008-12-12 | 2016-07-05 | O2Micro Inc | Circuits and methods for driving light sources |
| US9232591B2 (en) | 2008-12-12 | 2016-01-05 | O2Micro Inc. | Circuits and methods for driving light sources |
| US9253843B2 (en) | 2008-12-12 | 2016-02-02 | 02Micro Inc | Driving circuit with dimming controller for driving light sources |
| US8508150B2 (en) | 2008-12-12 | 2013-08-13 | O2Micro, Inc. | Controllers, systems and methods for controlling dimming of light sources |
| US8378588B2 (en) | 2008-12-12 | 2013-02-19 | O2Micro Inc | Circuits and methods for driving light sources |
| CN103391006A (en) | 2012-05-11 | 2013-11-13 | 凹凸电子（武汉）有限公司 | Light source driving circuit and controller and method for controlling power converter |
| US8698419B2 (en) | 2010-03-04 | 2014-04-15 | O2Micro, Inc. | Circuits and methods for driving light sources |
| CN102665344B (en) * | 2012-05-08 | 2014-08-27 | 浙江英飞特节能技术有限公司 | Dimming circuit |
| CN103052223A (en) * | 2012-12-14 | 2013-04-17 | 浙江明烁电子科技有限公司 | LED (light-emitting diode) lamp control circuit and tent lamp |
| CN105338689B (en) * | 2014-08-14 | 2018-07-24 | 欧普照明股份有限公司 | A kind of LED tonings control circuit |
| TWI703897B (en) * | 2019-05-07 | 2020-09-01 | 益力半導體股份有限公司 | Self-adaptive dimming drive system |
| CN110513615A (en) * | 2019-07-29 | 2019-11-29 | 厦门普为光电科技有限公司 | Adjustable light lamp tube |
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2010
- 2010-04-09 TW TW099111045A patent/TWI435527B/en not_active IP Right Cessation
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| TW201136126A (en) | 2011-10-16 |
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