M423976 五、新型說明： 【新型所屬之技術領域】 本新型是關於-種㈣照明系統，且特別是 解電容的LED照明系統。 徑…、高电 【先前技術】 近幾年來’ LED的技術突艇進，故其已漸漸取代傳統昭明 螢光燈管、燈泡）而成為照明界的明日之星。咖的生產 ^^膽_祕有雜省碳、伽壽命長等伽，然而在 ^ ，系統中常因設置有電解電容的原故，而使_ *、、、明系統的使用寿命縮短。 為了敎led產生閃制縣’供給LED的電壓必麵定， 統設置電容值較高的電解電容。電解電“容屬 ==動:件’較常見的為銘質電解電容。峨解電容是以 二==醇:丙三醇、猶、和氨水等等所組成的糊 狀物备電解液所製成。相較於陶兜電容，電解電容能承受高電壓 ^具有較❺的電容值，然而電解f容也容易受溫度影響而使 命減低。根據實驗，當操作溫度處於105ΐ時，電解電用I 命約為15G0G小時，而當溫度高㈣操作溫度 ^ 的使用壽命便會辭。 士因此，即使LED照明系統中的LED有將近4萬小時的使用 畢命而由於電料使用壽命遠小於㈣且更換電解電容 也相當不科，故LED _纽驗轉命仙此會被大幅拉 低。此外，鶴電容還有體積大、溫度高時容易職的缺點。也 =識解電容的咖照明系統是值得本領域具有通 【新型内容】 ίΐί ί目的是提供—種LED照m此IED _系統無需 電解電谷’故具有較長的使用壽命。 ? M423976 根據上述目的與其他目的，本新型提供一種LED照明系統， 其包括：一整流器、一降壓式轉換器、一升降壓式轉換器、一 ，列、及一電容。其中，降壓式轉換器的輸入端電性連接於整流 器的輸出端，而升降壓式轉換器的輸入端則電性連接於降屢式轉 換器的輸出端。Lm)陣列電性連接於升降壓式轉換器的輸出端， 而電容則電性連接於升降壓式轉換器與LED陣列之間。 〇於上述之LED照明系統中，升降壓式轉換器為—SEpic轉換 器（Single-ended primary-inductor converter)或一返馳式轉換残 (Flyback converter)。 、〇 於上述之LED照明系統中，整流器為一橋式整流器。 於上述之LED照明系統中，LED陣列與升降壓式轉換器間電 性連接有一陶瓷電容或一 SMD電容。 於上述之LED照明系統中，更包括一功率因數校正器與一控 制1C。其中，功率因數校正器是連接於整流器與降壓式轉換器之 間，而控制1C的輸出端則電性連接於功率因數校正器。控制IC 的輸入端電性連接於升降壓式轉換器的輸出端，且控制IC根據該 升降壓式轉換器所輸出的電壓而控制該功率因數校正器。此外， 功率因數校正器與降壓式轉換器例如是彼此整合在一4。 於上述之LED照明系統中，更包括一穩壓補償電路，穩壓補 償電路電性連接於升降壓式轉換器與控制IC間。 由於電流在經過降壓式轉換器後其電壓值會降低，在較低的 ，壓下陶瓷電容可提供較高的電容值。而且，由於升降壓式轉換 器=輸出電壓已經較為平穩，故藉由陶曼電容之助，便可提供相 J平穩2輸出電壓，以供LED陣列使用。其中，當喊電容的電 容值愈高，則供給LED陣列的電壓便會愈平穩。 為讓本新型之上述目的、雜和伽更能鴨^懂下文將 以實施例並配合所附圖示，作詳細說明如下。 【實施方式】 M423976 凊參照圖l，圖1所繪示為本新型之第一實施例的LED照明 系統的方塊圖。此LED照明系統100包括一整流器11〇、一降壓 式轉換器120、一升降壓式轉換器13〇、與一 LED陣列160。其中， LED陣列160是由多個LED所排列組合而成。 整流器110例如為橋式整流器，其是與一外部電源2〇相連 接。請同時參照圖2A，圖2A所繪示為外部電源2〇的輸出電壓 VI的波形，由圖2A可知此外部電源2〇為一交流電壓源。在本實 施例中’外部電源20的電壓峰值約為264伏特。外部電源20所 提供的交流電壓VI在經過整流器110後成為一脈動直流電壓 • V2 ’整流器110輸出端的電壓V2的波形如圖2B所示。在經過整 流器110後，電壓峰值約為264^伏特。此外，由於整流器11〇 為橋式整流器，故具有將高頻雜訊濾除的功能【橋式整流器應該 沒有高頻雜訊濾除的功能，通常外部電源和橋式整流器之間會加 入EMI濾波器來濾除高頻雜訊】。 此外’降壓式轉換器120的輸入端是連接於整流器ι10的輸 出端，整流器110所輸出的脈動直流電壓V2再輸出到降壓式轉換 器120，此降壓式轉換器12〇是用以將脈動直流電壓V2的電壓值 降低’其輸出端的電壓V3之波形如圖2C所示。在本實施例中， ® 經過降壓式轉換器120後，電壓峰值約降為50伏特 另外’升降壓式轉換器130的輸入端是連接到降壓式轉換器 120的輸出端’降壓式轉換器120所輸出的電壓V3在經過升降壓 式轉換器130後’其電壓值會被調整。在本實施例中，升降壓式 轉換器為一返驰式轉換器或一 SEPIC轉換器。請比較圖2C與圖 2D，原本在升降壓式轉換器130的輸入端，電壓值較高的部分在 經過升降壓式轉換器130後會往下降’而電壓值較低的部分在經 過升降壓式轉換器130後則會往上升。也因此，升降壓式轉換器 130所輪出的電壓V4會較平穩，也就是說漣波(ripple)的幅度較 小’而趨近於理想的直流電壓。 M423976 此外’升降壓式轉換器m的輪出端還裝設有—陶究電容 no ’其是電性連接於升降壓式轉換器13G肖哪陣列16〇間， 並與LE㈣列160並聯。藉由陶竟電容17〇，可大幅降低電壓V4 的漣波(ripple) ’而使陶究電容no的輪出電壓趨近於理想的直流 電壓。相較於電職容，職雜17G具有較高的·壽命，1 使用壽命料下於LED，且喊電容17G的成本也較低。此外了 相較於電解電容’ 陶i電容17〇财耐高賴且無法提供較 南的電容值，故習知的LED照明系統並未使用電容。外而， 在本實施例中’由於電壓V2在經過降壓式轉換器12〇後其電壓值 會降低，故在LED照明系統1〇〇中可安襄較不耐高電壓的陶兗電 谷170。而且，由於升降壓式轉換器13〇的輸出電壓已經相對較為 平穩，故藉由電容值較低的陶瓷電容17〇，便可提供相當平穩的輸 出電壓，以供LED陣列160使用。其中，當陶瓷電容17〇的電容 值愈高’則供給LED陣列160的電壓便會愈平穩。 在本實施例的LED照明系統1〇〇中，由於無需設置電解電 谷，故LED照明系統1〇〇的使用奇命便不會受到電解電容的限 制，故可有較高的使用壽命。另外，也由於無需設置電解電容， LED照明系統1〇〇可具有較低的成本。 在上述的實施例中，是以陶瓷電容做為電容的實施例，但本 領域具有通常知識者也可將陶瓷電容更換為SMD電容，或其他型 態的電容，只要該電容有比電解電容較高的使用壽命即可。 另外，請繼續參照圖1。UED照明系統1〇〇還包括一穩魔補 償電路140、一控制1C 150、與一功率因數校正器180，其中功率 因數校正器180是連接於整流器11〇與降壓式轉換器12〇之間， 其是用以提高功率因數，以增加電力的利用效率。控制JC 15〇則 是根據升降壓式轉換器130所輸出的電壓，以控制功率因數校正 器180。另外’穩壓補償電路14〇則是因應控制1C 150而設計的， 期能確保通過控制1C 150的電壓與電流能穩定。 5月參照圖3’圖3所績示為本新型之第二實施例的LED照明 的方塊圖。相較於第—實施例，在本實施例中的LED照明系 越Z +、’ 1 力率因數校正器與降壓式轉換器是整合在—起，在此 為降壓式功率因數校正轉換器120,。 本新型以實施例說明如上，然其並非用以限定本新型所 之專利權利範圍。其專利保護範圍當視後附之申請專 圍及其等同領域而定。凡本領域具有通常知識者，在 =脫離本專利精神或範圍内，所作之更動或潤飾’均屬於 新型所揭示精神下所完成之等效改變或設計’且應包含 下述之申請專利範圍内。 【圖式簡單說明】 圖1所繪示為本新型之第一實施例的LED照明系統的方塊圖。 圖2A所繪示為外部電源之輸出電壓的波形。 圖2B所繪示為整流器之輸出電壓的波形。 圖2C所繪示為降壓式轉換器之輸出電壓的波形。 圖2D所繪示為升降壓式轉換器之輸出電壓的波形。 圖3所續·示為本新型之第二實施例的LED照明系統的方塊 圖。 【主要元件符號說明】 2〇 :外部電源 100 ' 1〇〇’ ： LED照明系統 110 :整流器 120 :降壓式轉換器 120’ ：降壓式功率因數校正轉換器 130 :升降壓式轉換器 14〇 ·穩麗補償電路 15〇 :控制ic M423976 160 : LED 陣列 170 :陶瓷電容 180 :功率因數校正器M423976 V. New description: [New technical field] The new type is about the (four) lighting system, and especially the LED lighting system for solving the capacitance.径..., high power [Prior Art] In recent years, the technology of LED has been introduced, so it has gradually replaced the traditional Zhaoming fluorescent tube and light bulb, and has become the star of the lighting industry. The production of coffee ^^ 胆_秘 has mixed carbon, gamma long life and other gamma, however, in ^, the system often has electrolytic capacitors, so that the service life of _ *,,, and Ming system is shortened. In order to generate a flash voltage in the flashing county's supply LED, the electrolytic capacitor with a higher capacitance value is set. Electrolytic electricity "capacity == movement: piece" is more common is the name electrolytic capacitor. The decompression capacitor is a paste composed of two == alcohol: glycerol, helium, and ammonia, etc. Compared with the ceramic pocket capacitor, the electrolytic capacitor can withstand high voltages ^ has a relatively high capacitance value, but the electrolytic f capacity is also susceptible to temperature and mission reduction. According to the experiment, when the operating temperature is 105 ,, the electrolytic electricity I life is about 15G0G hours, and when the temperature is high (four) operating temperature ^ the service life will be resigned. Therefore, even if the LED in the LED lighting system has nearly 40,000 hours of use and life is due to the material life is much less than (four) and It is also quite unreasonable to replace the electrolytic capacitor, so the LED _ 验 转 仙 仙 仙 仙 仙 仙 仙 仙 仙 仙 仙 。 。 。 。 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤 鹤It is worthy of the field [new content] ίΐ ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω illumination The system includes: a rectifier, a buck converter, a buck-boost converter, a column, and a capacitor, wherein the input end of the buck converter is electrically connected to the output of the rectifier, and The input end of the step-up and step-down converter is electrically connected to the output of the step-down converter. The Lm) array is electrically connected to the output of the buck-boost converter, and the capacitor is electrically connected to the buck-boost converter. Between the LED array and the above LED lighting system, the buck-boost converter is a single-ended primary-inductor converter or a flyback converter. In the LED lighting system, the rectifier is a bridge rectifier. In the above LED lighting system, the LED array and the buck-boost converter are electrically connected to a ceramic capacitor or an SMD capacitor. In the above LED lighting system, A power factor corrector and a control 1C, wherein the power factor corrector is connected between the rectifier and the buck converter, and the output of the control 1C is electrically connected to the power factor The input end of the control IC is electrically connected to the output of the buck-boost converter, and the control IC controls the power factor corrector according to the voltage outputted by the buck-boost converter. In addition, the power factor corrector and the drop The voltage converters are integrated with each other, for example. In the above LED lighting system, a voltage compensating circuit is further included, and the voltage compensating circuit is electrically connected between the buck-boost converter and the control IC. After the buck converter, the voltage value will decrease. At the lower, the ceramic capacitor can provide a higher capacitance value. Moreover, since the buck-boost converter = the output voltage has been relatively stable, the Taman capacitor is used. With the help of, the phase J smooth 2 output voltage can be provided for use in the LED array. Among them, the higher the capacitance value of the shout capacitor, the smoother the voltage supplied to the LED array. In order to make the above-mentioned objects, miscellaneous and gamma abilities of the present invention, the following description will be made in detail by way of examples and with the accompanying drawings. [Embodiment] M423976 Referring to FIG. 1, FIG. 1 is a block diagram showing an LED illumination system according to a first embodiment of the present invention. The LED lighting system 100 includes a rectifier 11A, a buck converter 120, a buck-boost converter 13A, and an LED array 160. The LED array 160 is formed by combining a plurality of LEDs. The rectifier 110 is, for example, a bridge rectifier that is connected to an external power source 2A. Please refer to FIG. 2A at the same time. FIG. 2A shows the waveform of the output voltage VI of the external power source 2〇. As shown in FIG. 2A, the external power source 2 is an AC voltage source. In the present embodiment, the voltage peak of the external power source 20 is about 264 volts. The AC voltage VI supplied from the external power source 20 becomes a pulsating DC voltage after passing through the rectifier 110. The waveform of the voltage V2 at the output of the V2' rectifier 110 is as shown in Fig. 2B. After passing through the rectifier 110, the voltage peak is about 264 volts. In addition, since the rectifier 11 is a bridge rectifier, it has the function of filtering high-frequency noise. [The bridge rectifier should have no function of filtering high-frequency noise. Usually, EMI filtering is added between the external power supply and the bridge rectifier. To filter out high frequency noise]. In addition, the input end of the buck converter 120 is connected to the output terminal of the rectifier ι10, and the pulsating DC voltage V2 outputted by the rectifier 110 is output to the buck converter 120, and the buck converter 12 is used for The voltage value of the pulsating DC voltage V2 is lowered, and the waveform of the voltage V3 at the output thereof is as shown in Fig. 2C. In this embodiment, after the buck converter 120, the voltage peak is reduced to about 50 volts. In addition, the input of the buck-boost converter 130 is connected to the output of the buck converter 120. The voltage V3 output by the converter 120 is adjusted after the buck-boost converter 130. In this embodiment, the buck-boost converter is a flyback converter or a SEPIC converter. Comparing FIG. 2C with FIG. 2D, originally at the input end of the step-up and step-down converter 130, the portion having a higher voltage value will fall after passing through the step-up and step-down converter 130, and the portion having a lower voltage value is subjected to the buck-boosting. The converter 130 will then go up. Therefore, the voltage V4 of the step-up/down converter 130 is relatively stable, that is, the amplitude of the ripple is smaller, and the ideal DC voltage is approached. M423976 In addition, the wheel-out terminal of the buck-boost converter m is also equipped with a ceramic capacitor no ’, which is electrically connected to the flip-flop converter 13G and is arranged in parallel with the LE (four) column 160. With a capacitor of 17 陶, the ripple of the voltage V4 can be drastically reduced, and the wheel-out voltage of the ceramic capacitor no is brought closer to the ideal DC voltage. Compared with the electric job, the professional miscellaneous 17G has a higher life, 1 life expectancy is under the LED, and the cost of shouting capacitor 17G is also low. In addition, the conventional LED lighting system does not use a capacitor compared to the electrolytic capacitor 'Tao' capacitor 17 which is highly resistant and cannot provide a relatively large capacitance value. In addition, in the present embodiment, since the voltage value of the voltage V2 is lowered after passing through the buck converter 12, the LED lighting system can be installed in the LED lighting system. 170. Moreover, since the output voltage of the step-up/down converter 13 is relatively stable, a relatively stable output voltage can be supplied by the ceramic capacitor 17 having a low capacitance value for use in the LED array 160. Among them, the higher the capacitance value of the ceramic capacitor 17 ’, the smoother the voltage supplied to the LED array 160. In the LED illumination system 1 of the present embodiment, since it is not necessary to provide an electrolytic cell, the use of the LED illumination system 1 is not limited by the electrolytic capacitor, so that it has a high service life. In addition, since there is no need to provide an electrolytic capacitor, the LED lighting system can have a lower cost. In the above embodiments, a ceramic capacitor is used as the capacitor. However, those skilled in the art can also replace the ceramic capacitor with an SMD capacitor or other type of capacitor, as long as the capacitor has a smaller electrolytic capacitor than the electrolytic capacitor. High service life can be. In addition, please continue to refer to Figure 1. The UED illumination system 1 further includes a stabilization compensation circuit 140, a control 1C 150, and a power factor corrector 180, wherein the power factor corrector 180 is connected between the rectifier 11 and the buck converter 12A. It is used to increase the power factor to increase the efficiency of power utilization. The control JC 15 is based on the voltage output from the buck-boost converter 130 to control the power factor corrector 180. In addition, the 'regulator compensation circuit 14' is designed to control the 1C 150, which ensures that the voltage and current of the 1C 150 can be stabilized by the control. A block diagram of the LED illumination of the second embodiment of the present invention will be described with reference to Fig. 3' Fig. 3 in May. Compared with the first embodiment, the LED illumination system in this embodiment is integrated with the Z +, ' 1 force rate factor corrector and the buck converter, and here is a buck power factor correction conversion. 120,. The present invention is described above by way of example, but it is not intended to limit the scope of the patent claims. The scope of patent protection is subject to the scope of the application and its equivalent. Those of ordinary skill in the art, within the spirit or scope of the patent, are modified or modified to be equivalent to the equivalent changes or designs made under the spirit of the novel disclosure and shall include the following claims. . BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an LED lighting system of a first embodiment of the present invention. FIG. 2A illustrates the waveform of the output voltage of the external power source. Figure 2B shows the waveform of the output voltage of the rectifier. Figure 2C shows the waveform of the output voltage of the buck converter. FIG. 2D illustrates the waveform of the output voltage of the buck-boost converter. Figure 3 is a block diagram showing the LED lighting system of the second embodiment of the present invention. [Main component symbol description] 2〇: External power supply 100 ' 1〇〇' : LED lighting system 110 : Rectifier 120 : Buck converter 120 ' : Buck power factor correction converter 130 : Buck-Boost converter 14 〇·Vanity Compensation Circuit 15〇: Control ic M423976 160 : LED Array 170 : Ceramic Capacitor 180 : Power Factor Corrector