M423416 2011年Γ2月_8~日修正替換頁 五、新型說明： 【新型所屬之技術領域】 本創作係一種交流LED驅動電路，尤指一種交流|_ED 驅動電路之熱分散動態控制裝置。 【先前技術】 請參圖6所示，係為一種交流|_ED驅動電路，其包含 一全橋整流器50、一 LED單元51、一壓控電晶體52、一 電流檢測單元53及一穩流控制單元54;其中該全橋整流器 50係連接至一交流電源，該交流電源整流成—直流弦波電 源後輸出至该LED單元51，由於該壓控電晶體52及該電 流檢測單元53係串接於直流弦波電源與LED單元μ構成 的電源迴路上，故該穩流控制單元54可藉由該電流檢測單 元53檢知目前LED單元51的電流大小，再依據一參考電 流值判斷目前電流是否過大或過小，再根據判斷結果調整 壓控電晶體52的偏壓’以控制LED單元51電流的電流值 維持一定；是以，該LED單元51可穩定發光。 上述交流LED驅動電路50係為一種非隔離型的驅動電 路’而且未使用電容或電感元件，整體的功率因數是相各 高的’亦具有高轉換效率，具有節省電能功效；^而，1 述驅動電路為使得LED單元51維持穩定電流，而㈣單顆 壓控電晶體52作為控制LED單元的電子元件，於使 數的LED單元51時，該壓控電晶體相當 问 常運作。 相田-易過熱而無法正 3 M423416 2011年12月8日修正替換頁 【新型内容】 有鑑於上述交流LED驅動電路的單顆壓控電晶體在用 於冋瓦數LED單元場合中易因高熱而無法正常運作之技術 缺點’本創作主要目的係提供一種交流LED驅動電路之熱 分散動態控制裝置。 欲達上述目的所使用的主要技術手段係令交流led驅 動電路之熱分散動態控制裝置包含有：一 LED單元、一主 壓控電晶體、複數電源分散單元、一電流檢測單元、一電 壓檢知單元及一穩流控制暨功率運算單元；其中該led單 元、該壓控電晶體及電流檢測單元係串接於一交流電源， 當該穩流控制暨功率運算單元控制壓控電晶體導通時，即 構成一電源迴路；又複數電源分散單元與該壓控電晶體並 聯，各電源分散單元包含有一阻抗性元件及一子壓控電晶 體。 當交流電源輸入時，該穩流控制暨功率運算單元首先 控制該主壓控電晶體導通而構成一電源迴路，檢知該led 單元電壓，並透過電流及電壓檢測單元檢知電源迴路電流 及電壓，計算總功率及目前LED單元功率，再取二者差值 即為目前消耗功率；如此，再依據消耗功率大小開啟對應 功率範圍的電源分散單元之子壓控電晶體，由於階數愈高 的電源分散單元的子壓控電晶體，會有愈多阻抗性元件串 接於電源迴路上，故用於高瓦數LED單元時，可分擔主壓 控電晶體的功率，避免壓控電晶體過熱而無法正常運作。 M423416 20”年12月8曰修正替換頁| 【實施方式】 首先切參閱圖1所示’係為本創.作交流L E D驅動電路 之熱分散動態控制裝置的電路圖，其包含有： 一全橋整流器1 〇，係連接一交流電源，將交流電源轉 換為一直流弦波電源； 一 LED單元11 ’係正極端連接至該全橋整流器1 〇的 全橋整流的正輸出端，該LED單元11係可由複數led元 件串聯及/或並聯而成； 一主壓控電晶體12，其一端連接於該[ED單元11的 負極端；其中該主壓控電晶體12可為MOFET或丨GBT等 功率電晶體’於本實施例中係使用MOFET作為主壓控電晶 體，其包含有閘極、汲極及閘極（控制端）； 複數電源分散單元1 3，係對應不同功率範圍，且並聯 至該主壓控電晶體12的二端，即該M〇SFET的源極及汲 極，其中各電源分散單元彳3係包含有一子壓控電晶體】31 及一串接於該子壓控電晶體131之阻抗性元件132 ;於本 實施例中，該子壓控電晶體131可為一 M0FET或|GBT， 右使用MOSFET時則包含有閘極、汲極及問極（控制端）； 其中該子壓控電晶體！ 31的&極係連接至電阻，32 一端， 而其源極及電阻另-端係連接至該主壓控電晶體12的源極 及汲極；又該阻抗性元件132可為電阻、led元件或其它 類似元件； 電/;IL檢測單疋1 4，係連接至該主壓控電晶體1 2的另 端以及e亥全橋整流器】〇的負輸出端之間，以透過該主壓 控電晶體12或任-電源分散單元與led單元⑴冓成電源 5 M423416 ^2011 日修正替 迴路；於本實施例該電流檢知單元14係為一電阻且為固 定電阻值電阻； 一電壓檢測單元16,係連接至該led單元n與該主 壓控電晶體12連接節點之間，以及各電源分散單元13的 子壓控電晶體131與其阻抗性元件132的連接節點之間， 以取得導通的主壓控電晶體12或任一導通的子壓控電晶體 131的電壓V1〜Vn ; 一穩流控制暨功率運算單元15,係連接至該主壓控電 晶體1 2及各子壓控電晶體，3彳的控制端（閘極），並透過— 低通濾波器1 50連接至該電流檢測單元’ 4，以透過該電流 檢測單元14檢測該LED單元w電流，並檢知導通的主: 控電晶體1 2或任一導通的子壓控電晶體’ 31的電壓後，計 算出目前消耗功率，依目前消耗功率值決定切換至對應功率 範圍的電源分散單元或維持目前導通的主電控制電晶體；同 時依據目前檢知電流，控制該主壓控電晶體12或各子壓控 電晶體131電壓，以維持該LED單元n電源迴路的電^ 為一定。 以下謹進一步說明上述熱分散動態控制裝置的電路動 作，首先當交流電源開啟時，該穩流控制暨功率運算單元 15首先控制該主壓控電晶體12導通，令led單元的電 源迴路得以構成，該穩壓控制單元1 5再透過該電壓檢測單 元1 6檢知該導通後主壓控電晶體彳2到接地的電壓，再透 過電流檢測單元1 6檢知的電源迴路的電流後，即可直接計 异目鈿消耗功率’再判斷目前消耗功率落入任一電源分散 單元1 3對應的功率範圍中。 斷目前消耗功率Pc落入第—階電源分 的功率範圍時（P11<PC<P12)，即關閉 ip , - ^ ^ t Ul的主壓控電晶體 7第一階電源分散單元13,的子屡控電晶體131導 如圖2A所示，在LED單元11的電源迴路中即多串接 ::::件132;是以，消耗功率即可部份由-阻抗性元 。。如圖2B所不’若判斷目前消牦功率落入第二階電源分 散單元13’的功率範圍時（p p p 、 乾固時（P21<Pc<P22)，即關閉圖1的主廢 控電晶體12，而令第-卩由雷，·盾八典。》_ - 弟一阽電源分散早兀13,的子壓控電晶體 _通，在LED單元11的電源迴路中即多宰接二阻抗性 疋件132 ’·是以’消耗功率的部份可由二阻抗性元件⑶ 共同分擔，避免該子壓控電晶體131過熱。 再者’睛配合參閱圖3所示，上述LED驅動電路的電 流檢，單元14,可為一可變電阻，因此上述穩流控制暨功率 運算單it 15無法得知目前電阻值，而無法透過電流檢測單 元14檢知LED單元11的電流；是以，該穩流控制暨功率 ^算單το 1 5進一步透過一切換開關】51連接至該電流檢測 單元14，而該切換開關】51係連接一定電流源彳52。如此， 該穩流控制暨功率運算單元15於欲檢知目前該LED單元 11電流時，先透過該切換開關151將該電流檢測單元14， 連接至该定電流源Ί 52 ’藉由定電流源、，5，及電流檢測單 兀1 4的壓降，即可得知目前電流檢測單元彳4，的電阻值， 而能正常檢知該LED單元11電流。 睛再參閱圖4所示，係為本創作交流LED驅動電路之 熱分散動態控制裝置的另一較佳實施例，其大多結構係與圖 M423416 2011年12月8日修正替換頁 1相同，直接由該穩流控制暨功率運算單元]5a直接連接至 該全橋整流器1 0的輸出端，以取得該直流弦波電源之電壓 Vin ’再内建有一上查表（look-up table)，以建立脈波調變寬 度X與高度y關係，並進一步内建一消耗功率計算程序以 计异消耗功率Pc，凊配合參閱圖5所示，由於該穩流控制 暨功率運算單元1 5係連接至該電流檢測單元’ 4，故可獲得 脈波電流訊號（為直流弦波訊號經LED單元後產生的），而 計算目前脈波電流訊號的脈波調變寬度χ，再以上查表確認 目刚脈波調變寬度對應的高度y，由高度y即可獲得脈波電 流訊號之高度與直流弦波電源波峰之比值，藉以計算出led 早元驅動電壓vLED與直流弦波電源電壓Vin的比值，而得 出LED單元驅動電壓vLED ;再將直流弦波電源電壓Vjn扣 掉驅動電壓vLED即可獲得消耗電壓Vc(Vin_VLED=Vc);最後 將消耗電壓vc乘上電源迴路的電流丨led即可獲得消耗功率 pc，是以，於本實施例中即可不必使用電壓檢測單元，只 要由該該穩流控制暨功率運算單元’ 5a計算目前消耗功率。 综上所述，當交流電源輸入時，本創作的穩流控制暨 功率運算單兀首先控制該主壓控電晶體導通而構成一電源 迖路，檢知泫LED單元電壓，並透過電流及電壓檢測單元 檢知電源迴路電流及電壓，計算總功率及目前lEd單元功 率，再取二者差值即為目前消耗功率；如此，再依據消耗 力率大小開啟對應功率範圍的電源分散單元之子壓控電晶 體由於階數愈尚的電源分散單元的子壓控電晶體，會有 愈夕阻抗性TL件串接於電源迴路上，故用於高瓦數Led單 元吩，可分擔主壓控電晶體的功率，避免壓控電晶體過熱 而無法正常運作 【圖式簡單說明】 圖1 ·係本創作-較佳實施例的電路圖。 圖2A:係圖】電路動作的等效電路圖。 圖2 B :你固4 „ ，、圖1另一電路動作的等效電路圖。 圖M423416 2011 Γ February _8~ day correction replacement page V. New description: [New technical field] This creation is an AC LED drive circuit, especially a heat dispersion dynamic control device for AC|_ED drive circuit. [Prior Art] Please refer to FIG. 6 , which is an AC |_ED driving circuit, which comprises a full bridge rectifier 50 , an LED unit 51 , a voltage controlled transistor 52 , a current detecting unit 53 and a steady current control The unit 54 is connected to an AC power source, and the AC power source is rectified into a DC-wave power supply and output to the LED unit 51. The voltage control transistor 52 and the current detecting unit 53 are connected in series. The current control unit 54 can detect the current current of the LED unit 51 by the current detecting unit 53 and determine whether the current current is based on a reference current value. If the voltage is too large or too small, and the bias voltage of the voltage control transistor 52 is adjusted according to the judgment result, the current value of the current of the LED unit 51 is controlled to be constant; that is, the LED unit 51 can stably emit light. The above-mentioned AC LED driving circuit 50 is a non-isolated driving circuit 'and does not use a capacitor or an inductor element, and the overall power factor is high in phase' and also has high conversion efficiency, and has the function of saving electric energy; The driving circuit is such that the LED unit 51 maintains a stable current, and (4) the single voltage-controlled transistor 52 serves as an electronic component for controlling the LED unit. When the number of LED units 51 is used, the voltage-controlled transistor operates quite a bit. Ai Tian - easy to overheat and can not be positive 3 M423416 December 8, 2011 revised replacement page [new content] In view of the above-mentioned AC LED drive circuit, a single voltage-controlled transistor is easy to use due to high heat in the case of wattage LED units Technical shortcomings that cannot function properly' The main purpose of this creation is to provide a thermal dispersion dynamic control device for an AC LED drive circuit. The main technical means used to achieve the above purpose is to make the thermal dispersion dynamic control device of the AC led drive circuit include: an LED unit, a main voltage controlled transistor, a plurality of power distribution units, a current detecting unit, and a voltage detection. a unit and a steady flow control and power calculation unit; wherein the LED unit, the voltage control transistor and the current detection unit are connected in series to an AC power source, and when the steady current control and power operation unit controls the voltage control transistor to be turned on, That is, a power supply circuit is formed; and a plurality of power distribution units are connected in parallel with the voltage control transistor, and each of the power dispersion units includes a resistive element and a sub-voltage controlled transistor. When the AC power input is input, the steady current control and power calculation unit first controls the main voltage control transistor to be turned on to form a power supply circuit, detects the LED unit voltage, and detects the power loop current and voltage through the current and voltage detecting unit. Calculate the total power and the current LED unit power, and then take the difference between the two is the current power consumption; thus, according to the power consumption, the sub-voltage controlled transistor of the power dispersing unit corresponding to the power range is turned on, because the power supply with higher order In the sub-voltage controlled transistor of the dispersing unit, more and more resistive elements are connected in series to the power supply circuit, so when used in a high wattage LED unit, the power of the main voltage controlled transistor can be shared to avoid overheating of the voltage controlled transistor. Not working properly. M423416 20" December 8th Correction Replacement Page | [Embodiment] First, refer to the circuit diagram of the thermal dispersion dynamic control device for the AC LED drive circuit shown in Figure 1, which includes: The rectifier 1 is connected to an alternating current power source to convert the alternating current power into a continuous stream power supply; an anode unit of the LED unit 11' is connected to the positive output of the full bridge rectifier of the full bridge rectifier 1 , the LED unit 11 The plurality of led elements may be connected in series and/or in parallel; a main voltage controlled transistor 12 having one end connected to the negative end of the [ED unit 11; wherein the main voltage controlled transistor 12 may be a power of MOFET or 丨GBT In the present embodiment, a transistor is used as a main voltage-controlled transistor, which includes a gate, a drain and a gate (control terminal); a plurality of power dispersion units 13 are corresponding to different power ranges, and are connected in parallel to The two ends of the main voltage controlled transistor 12, that is, the source and the drain of the M〇SFET, wherein each power dispersing unit 彳3 includes a sub-voltage controlled transistor 31 and a series connected to the sub-voltage control unit Impedance element 132 of crystal 131; In an embodiment, the sub-voltage controlled transistor 131 can be a M0FET or a |GBT, and when the MOSFET is used right, a gate, a drain, and a gate (control terminal) are included; wherein the sub-voltage controlled transistor! 31 & The pole is connected to the resistor, one end of the 32, and the source and the resistor are connected to the source and the drain of the main voltage controlled transistor 12; and the resistive element 132 can be a resistor, a led component or the like. Similar element; electric /; IL detection unit 14 is connected between the other end of the main voltage control transistor 12 and the negative output end of the e-full bridge rectifier to pass through the main voltage control transistor 12 or any-power dispersing unit and led unit (1) into a power supply 5 M423416 ^2011 day correction circuit; in this embodiment, the current detecting unit 14 is a resistor and is a fixed resistance value resistor; a voltage detecting unit 16, Is connected between the LED unit n and the connection node of the main voltage control transistor 12, and between the sub-voltage controlled transistor 131 of each power distribution unit 13 and the connection node of the impedance element 132 thereof to obtain the conduction main pressure. Voltage V1 of the control transistor 12 or any of the turned-on sub-voltage controlled transistors 131 ~Vn ; a steady flow control and power calculation unit 15 is connected to the main voltage control transistor 1 2 and each sub-voltage controlled transistor, 3 彳 control terminal (gate), and through - low pass filter 1 50 is connected to the current detecting unit '4 to detect the LED unit w current through the current detecting unit 14, and detect the conduction of the main: the control transistor 12 or the voltage of any of the turned-on sub-voltage controlled transistors '31 After that, the current power consumption is calculated, and the power distribution unit that switches to the corresponding power range is determined according to the current power consumption value or the main power control transistor that maintains the current conduction is maintained; and the main voltage control transistor 12 is controlled according to the current detection current. Each sub-voltage controlled transistor 131 voltage is maintained to maintain the power of the LED unit n power supply circuit. The circuit operation of the heat dispersion dynamic control device is further described below. First, when the AC power is turned on, the steady current control and power calculation unit 15 first controls the main voltage control transistor 12 to be turned on, so that the power supply circuit of the LED unit is configured. The voltage regulator control unit 15 further detects the voltage of the main voltage-controlled transistor 彳2 after the conduction to the ground through the voltage detecting unit 16, and then transmits the current of the power circuit detected by the current detecting unit 16. The power consumption is directly calculated to determine that the current power consumption falls within the power range corresponding to any of the power distribution units 13. When the current power consumption Pc falls within the power range of the first-order power source (P11 < PC < P12), the sub-voltage control unit 7 of the main voltage-controlled transistor 7 of ip, - ^ ^ t Ul is turned off. As shown in FIG. 2A, the controllable transistor 131 is connected in series in the power supply loop of the LED unit 11 :::: 132; that is, the power consumption can be partially caused by the -impedance element. . As shown in FIG. 2B, if it is judged that the current power consumption falls within the power range of the second-order power dispersing unit 13' (ppp, dry-solid (P21 < Pc < P22), the main waste control transistor of FIG. 1 is turned off. 12, and the first - 卩 by Lei, · Shield Eight Code." _ - Brother 阽 阽 阽 阽 阽 , , , , , , , , , , , , , , 子 子 子 子 子 子 子 子 子 子 子 子 子 子 子 子 子 子 子 子 子The element 132'· is that the part that consumes power can be shared by the two-resistance element (3) to prevent the sub-voltage-controlled transistor 131 from overheating. Further, the eye is matched with the current of the LED driving circuit shown in FIG. The detection unit 14 can be a variable resistor. Therefore, the steady current control and power calculation unit it 15 cannot know the current resistance value, and cannot detect the current of the LED unit 11 through the current detecting unit 14; The flow control and power calculation unit το 1 5 is further connected to the current detecting unit 14 through a switch 51, and the switch 51 is connected to a constant current source 彳 52. Thus, the steady current control and power operation unit 15 When you want to detect the current current of the LED unit 11, first pass through The switch 151 connects the current detecting unit 14 to the constant current source Ί 52 ' by the constant current source, 5, and the voltage drop of the current detecting unit 14 to obtain the current detecting unit 彳 4 The resistance value of the LED unit 11 can be detected normally. The eye is further shown in FIG. 4, which is another preferred embodiment of the thermal dispersion dynamic control device for creating an alternating current LED driving circuit, and most of the structures are It is the same as the correction replacement page 1 of FIG. M423416 on December 8, 2011, and is directly connected to the output end of the full-bridge rectifier 10 by the steady current control and power calculation unit 5a to obtain the voltage Vin of the DC sine wave power supply. 'There is a built-in look-up table to establish the pulse width modulation width X and the height y relationship, and further built a power consumption calculation program to calculate the power consumption Pc, which is referred to FIG. It is shown that since the steady current control and power calculation unit 15 is connected to the current detecting unit '4, a pulse current signal (generated after the DC string signal is transmitted through the LED unit) can be obtained, and the current pulse current is calculated. Signal pulse Width χ, then check the table to confirm the height y corresponding to the modulation width of the pulse wave. From the height y, the ratio of the height of the pulse current signal to the peak of the DC sine wave power source can be obtained, thereby calculating the led early element driving voltage vLED. The ratio of the DC sine wave power supply voltage Vin is obtained, and the LED unit driving voltage vLED is obtained; then the DC sine wave power supply voltage Vjn is deducted from the driving voltage vLED to obtain the consumption voltage Vc (Vin_VLED=Vc); finally, the consumption voltage vc is multiplied. The current consumption circuit pc can obtain the power consumption pc. Therefore, in this embodiment, it is not necessary to use the voltage detecting unit, as long as the current power consumption is calculated by the steady current control and power computing unit '5a. In summary, when the AC power input, the current steady flow control and power calculation unit first controls the main voltage control transistor to conduct to form a power supply circuit, detect the voltage of the LED unit, and transmit current and voltage. The detecting unit detects the current and voltage of the power supply loop, calculates the total power and the current lEd unit power, and then takes the difference between the two as the current power consumption; thus, according to the power consumption rate, the sub-voltage control of the power dispersing unit corresponding to the power range is turned on. The transistor has a step-by-step voltage-controlled transistor of the power dispersing unit, and the TL device is connected in series to the power supply circuit, so it is used for the high-wattage Led unit phen, which can share the main voltage-controlled transistor. The power of the voltage-controlled transistor is prevented from overheating and cannot operate normally. [Simplified description of the drawings] Fig. 1 is a circuit diagram of the present invention. Figure 2A: Diagram of the equivalent circuit diagram of the circuit operation. Figure 2 B: You are solid 4 „ , and the equivalent circuit diagram of another circuit operation in Figure 1.
0 係本創作另一穩流控制暨功率運算單元的電路 圖4係本創作另一較佳實施例的電路圖。 圖5:係本創作直流弦波電源與脈波電流訊號的波形 圖6 :係即有交流led驅動電路圖。 【主要元件符號說明】 10全橋整流器 1 1 LED單元 12主壓控電晶體 13、13’電源分散單元 131子壓控電晶體 132電阻 14、14’電流檢測單元1 5、1 5a穩流控制暨功率運算 早兀 150低通濾波器 1 52定電流源 51 LED單元 5 3電流檢測單元 151切換開關 50全橋整流器 52壓控電晶體 54穩流控制單元 90 is a circuit for creating another steady current control and power operation unit. Fig. 4 is a circuit diagram of another preferred embodiment of the present invention. Figure 5: The waveform of the DC sine wave power supply and the pulse current signal is shown in Figure 6. Figure 6 shows the AC drive circuit diagram. [Main component symbol description] 10 full bridge rectifier 1 1 LED unit 12 main voltage control transistor 13, 13' power dispersion unit 131 sub voltage control transistor 132 resistance 14, 14' current detection unit 1 5, 1 5a steady flow control Cum power calculation early 150 low pass filter 1 52 constant current source 51 LED unit 5 3 current detection unit 151 switch 50 full bridge rectifier 52 voltage control transistor 54 steady flow control unit 9