201041444 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明為一種可以調整輪出的能量轉換裝置，尤其是一 種LED驅動器。特別適用於LED照明的驅動裝置。 【先前技術】 [0002] 由於LED的電流與電壓關係是成指數性變化，故無法像傳 統的裝置直接以電壓電源供電。至今已經有相當多種LED 驅動器的設計，將一個傳統的電源，轉換成適用於LED負 ^ 載，且在一定範圍的電壓及電流。在這些LED驅動器的設 〇 計中，也提出了相當多的亮度調整方式，譬如說，美國 專利732103所提到的，以一個PWM訊號來控制亮度的方 式。目前市售的LED驅動器，都需要各式各樣的輸入訊號 ，以作為亮度調整的控制訊號。 [0003] 而這個額外的控制訊號，並不存在於傳統的燈具的電源 佈線中。所以會有如，美國專利申請號1 1 /5531 27提出 需要有個開關的需求，而其提出的方案如該申請案的圖 〇 九所示，是將開關裝在燈炮上，或者僅提及需要一個遠 端的控制開關。這些開關，都是在原來電源開關之外的 額外裝置，都無法以既有的照明電源開關來控制。或者 如美國專利申請號11/101，643，如其圖一所示，提出在 傳統的開關、亮度調整開關中，加入一個延伸模組 (expansion module)來將傳統的開關、亮度調整開關 的訊號，轉換出LED驅動器所需的亮度調整訊號。這種方 式，電源和開關並非如傳統方式為串連在一起，一樣需 要改動原有的照明配置設計才能達到。 098116095 表單編號A0101 第3頁/共12頁 0982027272-0 201041444 [0004] 本發明提出一種LED驅動器的設計，使得製作出的燈具， 裝到一般的燈具上，就可以用既有的電源開關達到亮度 調整的設計。 【發明内容】 [0005] 本發明提出一個能量轉換裝置，尤其是一種LED驅動裝置 ，如圖一所示，它包含了一個能量轉換單元100，此單元 100可以由輸入電源300，轉換並輸出適當的電壓、電流 給特定的負載400，如LED。而其輸出更可依據一個調整 參數，進行調整。而此調整參數，在每次電源開關310開 啟或者關閉時會變更，使得其與上次電源開啟時的數值 不同，進而，使得此裝置的輸出能量不同。如此，使用 者就可以，以反覆開啟、關閉的方式來達到調整LED亮度 的目的，使得LED燈具用在傳統的燈具上就具有亮度調整 的功能。 [0006] 本發明也提出，如圖一所示，可以由一個獨立供電單元 20 0來儲存上述之調整參數。此獨立供電單元，可以由一 個獨立的儲能元件220來供給所需的能源。在輸入電源開 關310開啟時，可對此儲能元件220充電。而在輸入電源 開關310關閉時，由儲能元件220供電給獨立供電單元 200，以使其能儲存上述之調整參數。當輸入電源開關再 度打開或關閉時，調整參數會依照特定的規則變化，使 得其數值與上次電源打開時不同。 [0007] 本發明提出一個選擇性的功能，上述之儲能元件220，可 選擇一個有限的、適當的儲存能源的大小。使得當輸入 電源開關310關閉較久的一段時間時，儲能元件22 0的能 098116095 表單編號A010] 第4頁/共12頁 0982027272-0 201041444 量會耗盡，進而引發調整參數的重設。如此，當使用者 在連續的開關中，可以改變LED的亮度，但在較久的關閉 時間後，亮度設定可以重設到原先設定的數值。 [0008] 本發明另提出一個在輸入電源關閉時，儲存調整參數的 方式，就是儲存於非揮發性記憶體，而在每次輸入電源 開啟後，讀取、改變，並儲存此調整參數。 [0009] 本發明提出，此一調整參數可以為亮度調整參數。此參 數的實施方式的方法之一，是做為一個電流調整參數。 〇 另一個實施方式，是能量轉換單元的輸出端，加上一個 開關，而以脈衝調變訊號控制此一開關來達到亮度調整 的目的，而此調整參數，作為改變此一脈衝調變訊號的 負載循環（duty cycle)來達到改變輸出亮度的目的。 【實施方式】 [0010] 〇 [0011] [0012] [0013] 098116095 既有的電源有許多種，而針對某一電源所設計的能量轉 換設計也有許多種。在此僅舉出其中一種，以作為此發 明實施之例。事實上，本#明可實施的方式有很多，在 此，參考圖二，其中包括了 ： 1. 電源300及電源開關31 0。此發明可以適用於各種電源 ，如：交流電源，僅需搭配不同的能量轉換設計即可。 在此為直流電源。 2. 負載400，在此以LED為例。 3. 能量轉換輸出單元100，為一降壓直流轉換器，故負載 400所需電壓需低於電源300的電壓。本發明亦可搭配升 壓轉換器、交流直流轉換器等。在此例中，工作原理為 表單編號A0101 第5頁/共12頁 0982027272-0 201041444 :電阻190為電流設定電阻’由偵測電阻兩端的電壓，來 得知是否符合目標電流。電阻端的電壓，將會由比較器 110比較，比較的結果，將會送到控制邏輯120中，控制 邏輯120依此產生特定的訊號到驅動器130，控制MOS開 關140的開啟與關閉。配合電容180與電感170，可使負 載400流過所欲設定的目標電流。此外，數位類比轉換器 150產生的輸出作為與電阻電壓比較之用，更改其數位輸 入值，也將改變最終的輸出電流。另有一個PWM訊號產生 器160，輸出訊號到控制邏輯120中。當PWM訊號產生器 ❻ 160輸出為高電位’控制邏輯12〇如前述運作，當pwM訊 號產生器160輯輸出為低電位時，控制邏輯120關閉MOS 開關140。如此可以達到輸出能量調整的功能。 [0014] 4.電容220，由電源300充電’儲存之電能供應給電源獨 立單元200。其中二極體260用來當電源開關31〇關閉時 ，防止電容2 0 0的電能會漏電到能量轉換輸出單元1 〇 〇。 齊納二極體270在於控制儲存電壓的上限。電容220的電 容值為適當的選擇，使得當電夢開關310關閉時間小於一 CJ 定時間時，能足夠保持電源獨立單元200的正常運作。 [0015] 5.電源獨立單元200的功能如下：當電源開關31〇打開或 關閉之後，電源偵測電路210偵測到後，發出—個訊號到 邏輯單元2 4 0，邏輯單元2 4 0將依特定規則更改記憶單元 250的數值。而§己憶早元250的數值輸出到能量轉換輸出 單元100的數位類比轉換器150和PWM產生器160，如此， 就會改變負載400LED的亮度。此外，當電源開關31〇關 閉時間很長時，電容220的儲能會耗盡，當源開關31〇重 098116095 表單編號A0101 第6頁/共12頁 0982027272-0 201041444 新開啟時，電源偵測電路230偵測後，發出一個訊號到邏 輯單元240，邏輯單元240將重設記憶單元250的數值。 [0016] 在實作上，可以將能量轉換輸出單元100、電源獨立單元 200、電源偵測電路210中，除了被動元件電阻190、電 容180和電感170以外的所有元件，整合在一個積體電路 之中。 【圖式簡單說明】 [0017] 圖一：為應用本發明之方塊圖 〇 [0018] 圖二：為應用本發明之實施案例 【主要元件符號說明】 [0019] 100:能量轉換輸出單元 200:第一電源獨立單元 21 0 :電源偵測電路 220:儲能元件 230 :電源偵測電路 3 0 0 :電源 〇 31 0 :電源開關 400:負載 [0020] 110:比較器 120:控制邏輯 130:驅動器 140:MOS開 150:關數位類比轉換器 160:PWM訊號產生器 098116095 表單編號A0101 第7頁/共12頁 0982027272-0 201041444 170:電感 180:電容 1 9 0 :電流設定電阻 240:邏輯單元 2 5 0 :記憶單元 260:二極體 270:齊納二極體 098116095 表單編號A0101 第8頁/共12頁201041444 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention is an energy conversion device that can adjust wheeling, and in particular, an LED driver. Especially suitable for driving devices for LED lighting. [Prior Art] [0002] Since the current-voltage relationship of an LED is exponentially changed, it cannot be directly supplied with a voltage source like a conventional device. To date, there have been quite a number of LED driver designs that convert a conventional power supply into a voltage load and current for a range of LED loads. A considerable number of brightness adjustment methods have also been proposed in the design of these LED drivers. For example, as described in U.S. Patent No. 732,103, a PWM signal is used to control the brightness. Currently, commercially available LED drivers require a wide variety of input signals to serve as control signals for brightness adjustment. [0003] This additional control signal does not exist in the power wiring of conventional luminaires. Therefore, for example, U.S. Patent Application No. 1 1 /5 531 27 proposes a need for a switch, and the proposed solution is as shown in Figure IX of the application, which is to mount the switch on the light bulb, or only mention A remote control switch is required. These switches, which are all extra devices outside the original power switch, cannot be controlled with the existing lighting power switch. Or, as shown in FIG. 1 of the US Patent Application No. 11/101,643, it is proposed to add an expansion module to the conventional switch and brightness adjustment switch to convert the signal of the conventional switch and the brightness adjustment switch. Converts the brightness adjustment signal required by the LED driver. In this way, the power supply and the switch are not connected in series as in the conventional way, and the original lighting configuration design needs to be changed. 098116095 Form No. A0101 Page 3 / Total 12 Page 0982027272-0 201041444 [0004] The present invention proposes an LED driver design, so that the produced lamp can be mounted on a general lamp, and the brightness can be achieved by using an existing power switch. Adjusted design. SUMMARY OF THE INVENTION [0005] The present invention provides an energy conversion device, particularly an LED driving device, as shown in FIG. 1, which includes an energy conversion unit 100, which can be converted and output by the input power source 300. The voltage and current are given to a specific load 400, such as an LED. The output can be adjusted based on an adjustment parameter. The adjustment parameter is changed each time the power switch 310 is turned on or off, so that it is different from the value when the power was turned on last time, and the output energy of the device is different. In this way, the user can adjust the brightness of the LED by repeatedly turning on and off, so that the LED lamp has the function of brightness adjustment on the conventional lamp. The present invention also proposes that, as shown in FIG. 1, the above adjustment parameters can be stored by an independent power supply unit. This independent power supply unit can be supplied with a required energy source by a separate energy storage element 220. This energy storage component 220 can be charged when the input power switch 310 is turned on. When the input power switch 310 is turned off, the energy storage element 220 supplies power to the independent power supply unit 200 to enable it to store the above adjustment parameters. When the input power switch is turned on or off again, the adjustment parameters will change according to specific rules, so that the value is different from the last time the power was turned on. The present invention proposes an optional function, the energy storage component 220 described above, which can select a limited, suitable storage energy source. When the input power switch 310 is turned off for a long period of time, the energy storage element 22 0 can be 098116095 Form No. A010] Page 4 / Total 12 page 0982027272-0 201041444 The amount is exhausted, which causes the reset parameter to be reset. Thus, when the user is in a continuous switch, the brightness of the LED can be changed, but after a longer off time, the brightness setting can be reset to the previously set value. [0008] The present invention further provides a way to store adjustment parameters when the input power is turned off, that is, stored in non-volatile memory, and read, change, and store the adjustment parameters after each input power is turned on. [0009] The invention proposes that the adjustment parameter can be a brightness adjustment parameter. One of the methods of implementing this parameter is as a current adjustment parameter. Another embodiment is an output end of the energy conversion unit, and a switch is added, and the switch is controlled by a pulse modulation signal to achieve brightness adjustment, and the adjustment parameter is used as a change of the pulse modulation signal. The duty cycle is used to achieve the purpose of changing the output brightness. [Embodiment] [0010] [0013] [0013] 098116095 There are many types of power sources available, and there are many types of energy conversion designs designed for a certain power source. Only one of them will be mentioned here as an example of the implementation of this invention. In fact, there are many ways in which this can be implemented. Here, referring to Figure 2, it includes: 1. Power supply 300 and power switch 31 0. The invention can be applied to various power sources, such as an AC power source, and only needs to be matched with different energy conversion designs. Here is the DC power supply. 2. Load 400, here taking LED as an example. 3. The energy conversion output unit 100 is a step-down DC converter, so the voltage required by the load 400 needs to be lower than the voltage of the power source 300. The present invention can also be combined with a boost converter, an AC-DC converter, and the like. In this example, the working principle is Form No. A0101 Page 5 / Total 12 Page 0982027272-0 201041444: Resistor 190 is the current setting resistor 'The voltage across the detection resistor is used to know whether the target current is met. The voltage at the resistor terminal will be compared by comparator 110. The result of the comparison will be sent to control logic 120, which in turn generates a specific signal to driver 130 to control the turn-on and turn-off of MOS switch 140. The capacitor 180 and the inductor 170 are coupled to cause the load 400 to flow through the desired target current. In addition, the output generated by the digital analog converter 150 is used as a comparison with the resistance voltage. Changing the digital input value will also change the final output current. There is also a PWM signal generator 160 that outputs a signal to the control logic 120. When the PWM signal generator ❻ 160 outputs a high potential 'control logic 12' as described above, when the pwM signal generator 160 outputs a low level, the control logic 120 turns off the MOS switch 140. This can achieve the function of output energy adjustment. [0014] 4. The capacitor 220 is charged by the power source 300 and the stored electrical energy is supplied to the power supply independent unit 200. The diode 260 is used to prevent the electric energy of the capacitor 200 from leaking to the energy conversion output unit 1 when the power switch 31 is turned off. Zener diode 270 is in controlling the upper limit of the storage voltage. The capacitance value of the capacitor 220 is appropriately selected so that when the power-off switch 310 is turned off for less than a CJ time, it is sufficient to maintain the normal operation of the power supply independent unit 200. [0015] 5. The function of the power independent unit 200 is as follows: after the power switch 31 is turned on or off, after the power detecting circuit 210 detects, a signal is sent to the logic unit 240, and the logic unit 2404 will The value of memory unit 250 is changed according to specific rules. While the value of the early element 250 is output to the digital analog converter 150 and the PWM generator 160 of the energy conversion output unit 100, the brightness of the load 400 LED is changed. In addition, when the power switch 31 is turned off for a long time, the energy storage of the capacitor 220 is exhausted. When the source switch 31 is 098116095, the form number A0101 is 6th, and the 12th page is 0982027272-0 201041444. After the circuit 230 detects, a signal is sent to the logic unit 240, and the logic unit 240 resets the value of the memory unit 250. [0016] In practice, all components except the passive component resistance 190, the capacitor 180, and the inductor 170 can be integrated into an integrated circuit in the energy conversion output unit 100, the power supply independent unit 200, and the power detection circuit 210. Among them. BRIEF DESCRIPTION OF THE DRAWINGS [0017] FIG. 1 is a block diagram for applying the present invention. [0018] FIG. 2: Embodiments for applying the present invention [Description of main component symbols] [0019] 100: Energy conversion output unit 200: The first power independent unit 21 0 : power detecting circuit 220 : energy storage element 230 : power detecting circuit 3 0 0 : power 〇 31 0 : power switch 400: load [0020] 110: comparator 120: control logic 130: Driver 140: MOS On 150: Off Digital Analog Converter 160: PWM Signal Generator 098116095 Form No. A0101 Page 7 of 12 0982027272-0 201041444 170: Inductor 180: Capacitor 1 9 0 : Current Setting Resistor 240: Logic Unit 2 5 0 : Memory unit 260: Diode 270: Zener diode 098116095 Form number A0101 Page 8 of 12
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