200926883 九、發明說明 【發明所屬之技術領域】 本發明有關於一種包含發光二極體（LED )的照明系 統，其中LED在高壓下操作。 【先前技術】 近年來，發光二極體（LED )在許多照明應用中已變 © 成非常有吸引力的一種選擇。其中一個原因是因爲它們比 傳統的白熱燈泡更有能源效率。 發光裝置的能源效率與發光效能有關，該發光效能的 測量單位爲每瓦特多少流明（lm/W )。此値將肉眼對於各 種波長的不同感光度納入考量。傳統的白熱燈泡典型具有 15 lm/W的效能，其比以氮化鎵爲基礎之LED目前所得之 效能少約1 0倍。 此外，LED有非常長的壽命（與白熱照明的1 000小 © 時相比爲1〇〇,〇〇〇小時）且對於驅動電流的改變非常敏 感，允許脈衝式的操作。 現今已有針對所有可見範圍的各種LED。LED固有地 發射單色光。然而，藉由使用磷光體及由氮化鎵製成之紫 外線LED的結合，可製造白光LED。這些，再加上其他 的方面，使得業界在許多不同應用中使用LED，例如汽 車、交通號誌及一般照明。 由於LED係由半導體材料所製成，以LED爲基礎之 照明系統一般需要足夠的冷卻，以確保正常操作及壽命。 -4- 200926883 冷卻系統之設計對於每LED可消耗高達3瓦之高功 率LED特別重要。LED典型安裝於載體上，如pcB或金 屬板，其則連接至殼體。由於這些載體材料的導熱性有 限，它們不適合高功率操作，除非這些板子的厚度保持爲 小。 含有複數個LED之大型發光系統，例如安裝在天花 板上，較佳應爲輕。此種系統之大部分的重量取決於殼 Q 體。例如鋁或其他金屬之金屬或含金屬化合物爲同時符合 熱與重量要求之具有成本效益的解答。 使用金屬殼體會對載體材料產生額外的要求。欲確保 最大安全性，需將導電殼體電性接地。因此載體必須要能 夠承受存在於在其上所載之LED與其下之導電殼體之間 的電場。 因此，應選擇具有高導熱性及高臨界電場之載體材 料。在傳統的LED系統中，使用分別具有0.25及200V大 〇 小之導熱性及臨界電場的載體材料。 許多LED系統內部係以10V至30V大小的相對低壓 操作。目前使用的大部分的載體材料可承受這些電壓同時 仍提供足夠的冷卻。 然而，此方式的一項缺點係有關於從主電源網路之電 壓至低內部電壓的電壓轉換有關。若可省略此步驟’可避 免此步驟所帶來的電力損失。此外，針對特定功率輸出’ 因較高之流動電流使低壓系統比高壓系統有更多歐姆損 失。 -5- 200926883 以LED爲基礎之照明亦可用於溫室中的光合作用照 明，取代傳統高壓鈉燈。雖然這些燈目前具有較高的發光 效能，其光譜輸出對於例如植物的發展並非最佳。以LED 爲基礎的照明系統具有可提供選擇最佳波長的優點。 現有之高壓鈉照明方法不允許有效率的冷卻。大量@ 紅外線輻射加熱系統的不同部份，與以LED爲基礎的系 統相反，以LED爲基礎的系統中，是在LED的半導體材 0 料中之光學主動接面中散發熱量，因此後者更容易加以冷 卻。 傳統溫室照明系統中缺乏適當的冷卻方法會導致非最 佳的生長條件。在溫室中，溫度與照明皆爲需加以控制的 因素。散發於系統中的任何熱量皆可能導致自最佳植物生 長條件偏離。 例如，若溫室外的周圍溫度接近最佳生長溫度，如夏 天時，無法進行傳統光合作用照明，因爲紅外線輻射直接 〇 與間接所產生的熱量的影響會抵銷照明帶來的正面效果。 在以LED爲基礎的系統中，此熱量可轉移到冷卻系 統，以拉長可利用光合作用照明之時間。因此，增加此種 溫室之生產能力，同時降低能源成本》 【發明內容】 有鑑於前述，本發明之一目的在於提供有能源效率之 以LED爲基礎的照明系統，可在高壓下內部操作且可設 有導電殼體。 -6- 200926883 本發明之另一目的在於將此種系統用於植物發展的光 合作用照明。 藉由根據所附之申請專利範圍的系統及使用來達成這 些目的。較佳實施例係界定在附屬項中。 根據第一態樣，本發明提供包含一種照明系統，其包 含電源供應單元、載體及包含安裝在載體上之複數個LED 的照明群組。 φ 電源供應器具有連接至主電源網路的輸入。在此文脈 中，主電源網路對應至存在於大部分建築中的電性網路， 其一般爲230V或110V的網路。 電源供應器之輸出提供經整流之電壓。此電壓較佳爲 在電源供應器之輸入的電壓之經整流過的形式。 載體包含實質上電性隔離之第一層，及導電之第二 層。第二層或其一部份具有界定清楚之電性電位。在此技 藝中，此種層一般稱爲電性非浮置層。 Q 照明群組包含連接至電源供應器及安裝在載體的第一 層上之複數個串連連接之發光二極體（LED ) 。LED通常 具有在約1.2V大小的順向壓降。 一群串連式連接的LED允許更有效率地使用可得的 電壓淨空高度（headroom) » LED —詞通常係指封裝的二極體。對熟悉該項技藝者 很明顯地此種照明群組亦可包括在相同半導體材料上之串 連連接之分離的二極體。 爲了能夠承受高電場，第一層具有實質上大於主電源 200926883 網路之根均方電壓除以該些LED的任一者與第二層之間 的最小距離之臨界電場。 由於照明系統可承受主電源網路之最大電壓程度的電 壓，無須向下轉換電壓，藉此免除典型針對此目的之電路 中所發生的損失。 欲進一步降低耗電量，同時仍維持適合的照明條件， 可使用閃光融合的原理。 0 此有名的原理係根據如人類或植物的生物無法區分穩 定照明情況與迅速交替照明情況或對這兩種情況有不同反 應，只要交替照明的頻率遠超過所謂的閃光融合頻率。 不同生物有不同的此頻率，且甚至可在屬於同種類之 生物間變化。由於在交替情況中散發的熱量小於穩定情 況，可節省能源。 在一較佳實施例中，系統進一步包含連接至電源供應 單元的電子控制單元。 φ 此單元調變至照明群組的電性信號，藉此調變照明群 組的光輸出。此調變的頻率實質上大於該主電源網路之操 作頻率或較佳實質上等於或大於與特定應用相關之閃光融 合頻率。 例如，若系統用於家用照明，則頻率一般在1 00 Hz 或更高的程度，其對應人類之閃光融合頻率。 在另一較佳實施例中，系統進一步包含導電殼體。殼 體尤其提供冷卻及機械穩定性給系統。載體較佳直接接觸 殼體，以確保載體與殼體間之最大熱量交換。 -8 ~ 200926883 在又一實施例中，電源供應單元包含 AC-DC轉換 器，以在該單元的輸出產生DC電壓。 較佳地，AC-DC轉換器包含全波整流器，並接著平坦 過濾器，以實現DC電壓。 可包括額外的過濾器以抑制重新注入到主電源網路之 諧波，且改善功率校準因子。這些電路在此技藝中爲熟 知，因而不進一步詳述。 φ 由於無電壓向下轉換，系統中的電壓典型在主電源網 路之根均方電壓的1.4倍的程度。 在一較佳的實施例中，該些LED的任一者之任一端 子與第二層之間的最大電壓爲至少11 0V。 爲了與在各種主電源網路中遇到的不同電壓相容，載 體之第一層較佳具有適合的臨界電場及導熱性。 在另一較佳的實施例中，電子控制單元以實質上等於 或大於照明下之植物的閃光融合頻率的頻率調變至該照明 〇 群組之該電性信號。此實施例特別適用於溫室中所用的光 合作用照明。 此外，欲將發射之光線的光譜分佈調整至對於植物之 光譜感光度，有效率地使用具有關聯的波長之LED，波長 的範圍從375至500、475至575及/或550至660 nm。 在一較佳的實施例中，載體之該第一及第二層分別包 含鋁層及氧化鋁層。氧化鋁爲具有高導熱性之非常好的絕 緣體。 殻體較佳亦用鋁製成。欲符合安全規定，殼體可電性 -9 - 200926883 接地。其可連接至主電源網路之中性參考點，但較佳連接 至接地。 雖殼體可提供足夠的冷卻，有利地使用連接至殼體之 額外的冷卻機構。 此種機構的一範例爲水冷系統。此種系統爲熟知，因 而省略詳細說明。此種系統可運送自照明系統擷取之熱量 至不同系統，可在該系統重新使用或儲存。例如，白天儲 φ 存在緩衝器中的能源可在晚上用來加熱溫室。 在一較佳的實施例中，可在相同群組中使用具有不同 波長的LED。此種配置可爲不同應用（如家用照明）之具 有吸引力的光源。 針對溫室中的應用，可針對給定波長的LED數量及 這些LED所發射的相對功率兩者來選擇照明群組中的 LED，使其波長分佈對應至植物的最佳光譜亮度。 本發明不排除白光LED中磷光體之組合的使用以達 〇 成相同的目標。 欲增加總光輸出，可將數個照明群組平行放置。這些 群組無需具有相同的波長分佈。相反地，若可由電子控制 單元個別地控制該等群組的一些，則可控制系統的總光譜 分佈。 例如，藉由使用不同調變頻率及/或電壓擺盪，可在 植物的生長程序最佳模式中或開花程序最佳模式中操作系 統。 類似地，在家用照明中，此種應用可用來調整照明情 -10- 200926883 況，如光強度或顏色。甚至可根據周圍環境，如溫度、音 量大小或可得曰光量來作自動調整。 較佳地，所有led係安裝在相同載體上。電子控制 單元及電源供應單元不需要有LED般的冷卻，因爲這些 元件散發少上許多的熱量。因此在不同載體上製造這些元 件會有成本效益。傳統低成本PCB可用在此目的上。 在又一實施例中，可外部調整頻率或振幅。依照此方 φ 式，使用者可調整波長分佈的光強度，而無需打開系統。 在本發明的脈絡內可改變對應至所有照明群組一整個 或個別針對各群組或一組群組的設定。 可用數種方法來改變系統的設定，包括有線、無線或 紅外線。不排除達成相同目標的其他機構。 【實施方式】 在第1圖中，LED 1係安裝在Al2〇3載體2上。LED 〇 設置有連接墊3及3’，用以與A1203載體2電性連接。類 似地，A120 3載體2設有連接墊4及4’。此外，LED及 A1203載體可分別設有導熱墊5及5，，提供可電性啓動之 熱連結。 具有LED之 Al2〇3載體係安裝在鋁片6上。由於 Al2〇3載體之優異隔離性質，可在LED及鋁之間獲得足夠 的電性隔離，同時提供充分的導熱性。因此，可使用高壓 操作（>230V )，減少電壓之向下轉換，藉此免除此種轉 換期間之損失。鋁片6可安裝於冷卻單元11中的溝槽11’BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination system including a light-emitting diode (LED) in which an LED operates at a high voltage. [Prior Art] In recent years, light-emitting diodes (LEDs) have become a very attractive option in many lighting applications. One reason is because they are more energy efficient than traditional incandescent bulbs. The energy efficiency of a luminaire is related to the luminosity, which is measured in units of lumens per watt (lm/W). This 纳入 takes into account the different sensitivities of the various wavelengths to the naked eye. Conventional incandescent bulbs typically have a performance of 15 lm/W, which is about 10 times less efficient than current GaN-based LEDs. In addition, LEDs have a very long life (1 〇〇, 〇〇〇 hours compared to 1 000 pm for white thermal illumination) and are very sensitive to changes in drive current, allowing for pulsed operation. Various LEDs are now available for all visible ranges. The LED inherently emits monochromatic light. However, a white LED can be fabricated by using a combination of a phosphor and an ultraviolet LED made of gallium nitride. These, together with other aspects, have led to the industry using LEDs in many different applications, such as cars, traffic signs and general lighting. Since LEDs are made of semiconductor materials, LED-based lighting systems typically require sufficient cooling to ensure proper operation and longevity. -4- 200926883 The design of the cooling system is especially important for high power LEDs that can consume up to 3 watts per LED. The LEDs are typically mounted on a carrier, such as a pcB or metal plate, which is attached to the housing. Due to the limited thermal conductivity of these carrier materials, they are not suitable for high power operation unless the thickness of these plates is kept small. A large illumination system containing a plurality of LEDs, such as a ceiling panel, should preferably be light. The weight of most of such systems depends on the shell Q body. Metals such as aluminum or other metals or metal-containing compounds are cost-effective solutions that meet both heat and weight requirements. The use of a metal housing creates additional requirements for the carrier material. To ensure maximum safety, the conductive housing needs to be electrically grounded. Therefore, the carrier must be able to withstand the electric field existing between the LEDs carried thereon and the conductive housing underneath. Therefore, a carrier material having high thermal conductivity and a high critical electric field should be selected. In a conventional LED system, a carrier material having a thermal conductivity and a critical electric field of 0.25 and 200 V, respectively, is used. Many LED systems operate at relatively low voltages from 10V to 30V. Most of the carrier materials currently in use can withstand these voltages while still providing sufficient cooling. However, one drawback of this approach is related to the voltage transition from the mains network voltage to the low internal voltage. If you can omit this step, you can avoid the power loss caused by this step. In addition, for a specific power output, the low voltage system has more ohmic losses than the high voltage system due to the higher flow current. -5- 200926883 LED-based lighting can also be used for photosynthesis lighting in greenhouses, replacing traditional high-pressure sodium lamps. Although these lamps currently have a high luminous efficacy, their spectral output is not optimal for, for example, the development of plants. LED-based lighting systems offer the advantage of choosing the optimum wavelength. Existing high pressure sodium lighting methods do not allow for efficient cooling. A large number of @infrared radiant heating systems, in contrast to LED-based systems, in which the heat is dissipated in the optically active junction of the semiconductor material of the LED, so the latter is easier Cool it down. The lack of proper cooling methods in conventional greenhouse lighting systems can lead to non-optimal growth conditions. In the greenhouse, both temperature and lighting are factors that need to be controlled. Any heat that is emitted in the system can cause deviations from optimal plant growth conditions. For example, if the ambient temperature outside the greenhouse is close to the optimal growth temperature, such as in summer, traditional photosynthesis illumination cannot be performed, because the direct effect of the direct radiation and the indirect heat generated by the infrared radiation will offset the positive effect of the illumination. In an LED-based system, this heat can be transferred to the cooling system to lengthen the time available for photosynthesis illumination. Therefore, increasing the production capacity of such a greenhouse while reducing the energy cost" SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide an energy efficient LED-based lighting system that can be operated internally under high pressure and A conductive housing is provided. -6- 200926883 Another object of the present invention is to use such a system for photosynthesis illumination for plant development. These objects are achieved by a system and use in accordance with the scope of the appended claims. The preferred embodiment is defined in the subsidiary item. According to a first aspect, the invention provides a lighting system comprising a power supply unit, a carrier and a lighting group comprising a plurality of LEDs mounted on the carrier. The φ power supply has an input connected to the main power network. In this context, the main power network corresponds to an electrical network that exists in most buildings, typically a 230V or 110V network. The output of the power supply provides a rectified voltage. This voltage is preferably a rectified form of the voltage input to the power supply. The carrier comprises a first layer that is substantially electrically isolated and a second layer that is electrically conductive. The second layer or a portion thereof has a well defined electrical potential. In this technique, such a layer is generally referred to as an electrically non-floating layer. The Q lighting group includes a plurality of series connected light emitting diodes (LEDs) connected to a power supply and mounted on a first layer of the carrier. LEDs typically have a forward voltage drop of approximately 1.2V. A group of connected LEDs allows for more efficient use of the available headroom. » LED — The word usually refers to the packaged diode. It will be apparent to those skilled in the art that such a lighting group can also include separate diodes connected in series on the same semiconductor material. In order to withstand a high electric field, the first layer has a critical electric field that is substantially greater than the root mean square voltage of the main power supply 200926883 divided by the minimum distance between any of the LEDs and the second layer. Since the lighting system can withstand the voltage of the maximum voltage of the mains network, there is no need to down-convert the voltage, thereby eliminating the losses typically incurred in circuits for this purpose. To further reduce power consumption while still maintaining suitable lighting conditions, the principle of flash fusion can be used. 0 This well-known principle is based on the inability of human or plant organisms to distinguish between stable lighting conditions and rapid alternating lighting conditions or for different situations, as long as the frequency of alternating illumination far exceeds the so-called flash fusion frequency. Different organisms have different frequencies and can even vary between organisms belonging to the same species. Energy savings can be achieved because the amount of heat dissipated in alternating conditions is less than stable. In a preferred embodiment, the system further includes an electronic control unit coupled to the power supply unit. φ This unit modulates the electrical signal to the lighting group, thereby modulating the light output of the lighting group. The frequency of the modulation is substantially greater than the operating frequency of the primary power network or preferably substantially equal to or greater than the flash fusion frequency associated with the particular application. For example, if the system is used for home lighting, the frequency is typically 1 00 Hz or higher, which corresponds to the human flash fusion frequency. In another preferred embodiment, the system further includes a conductive housing. The housing in particular provides cooling and mechanical stability to the system. The carrier preferably contacts the housing directly to ensure maximum heat exchange between the carrier and the housing. -8 ~ 200926883 In yet another embodiment, the power supply unit includes an AC-DC converter to generate a DC voltage at the output of the unit. Preferably, the AC-DC converter comprises a full wave rectifier and then a flat filter to achieve a DC voltage. Additional filters may be included to suppress re-injection into the mains network and improve the power calibration factor. These circuits are well known in the art and will not be described in further detail. φ Since there is no voltage down conversion, the voltage in the system is typically 1.4 times the root mean square voltage of the main power supply network. In a preferred embodiment, the maximum voltage between any of the terminals of the LEDs and the second layer is at least 110V. In order to be compatible with the different voltages encountered in various main power networks, the first layer of the carrier preferably has a suitable critical electric field and thermal conductivity. In another preferred embodiment, the electronic control unit is tuned to the electrical signal of the group of illuminations at a frequency substantially equal to or greater than the flash fusion frequency of the plant under illumination. This embodiment is particularly suitable for use in photosynthesis lighting used in greenhouses. In addition, to adjust the spectral distribution of the emitted light to spectral sensitivity to plants, LEDs with associated wavelengths are used efficiently, ranging in wavelengths from 375 to 500, 475 to 575, and/or 550 to 660 nm. In a preferred embodiment, the first and second layers of the carrier comprise an aluminum layer and an aluminum oxide layer, respectively. Alumina is a very good insulator with high thermal conductivity. The housing is preferably also made of aluminum. To comply with safety regulations, the housing can be electrically grounded -9 - 200926883. It can be connected to the neutral reference point of the mains network, but is preferably connected to ground. While the housing provides sufficient cooling, an additional cooling mechanism coupled to the housing is advantageously employed. An example of such a mechanism is a water cooling system. Such a system is well known and detailed description is omitted. Such systems can carry the heat extracted from the lighting system to different systems where they can be reused or stored. For example, the energy stored in the buffer during the day can be used to heat the greenhouse at night. In a preferred embodiment, LEDs having different wavelengths can be used in the same group. This configuration provides an attractive source of light for different applications, such as home lighting. For applications in the greenhouse, the LEDs in the illumination group can be selected for both the number of LEDs of a given wavelength and the relative power emitted by these LEDs, with their wavelength distribution corresponding to the optimal spectral brightness of the plant. The present invention does not exclude the use of a combination of phosphors in white LEDs to achieve the same goal. To increase the total light output, several lighting groups can be placed in parallel. These groups do not need to have the same wavelength distribution. Conversely, if some of the groups are individually controlled by the electronic control unit, the overall spectral distribution of the system can be controlled. For example, by using different modulation frequencies and/or voltage swings, the system can be operated in the plant's growth program optimal mode or in the flowering program best mode. Similarly, in home lighting, such an application can be used to adjust lighting conditions, such as light intensity or color. It can even be adjusted automatically according to the surrounding environment, such as temperature, volume, or available amount of light. Preferably, all of the led systems are mounted on the same carrier. The electronic control unit and power supply unit do not require LED-like cooling because these components emit a small amount of heat. It is therefore cost effective to manufacture these components on different carriers. Traditional low cost PCBs are available for this purpose. In yet another embodiment, the frequency or amplitude can be externally adjusted. According to this formula, the user can adjust the light intensity of the wavelength distribution without opening the system. The settings corresponding to all or individually for each group or group of groups can be changed within the context of the present invention. There are several ways to change the system settings, including wired, wireless or infrared. Other agencies that achieve the same goal are not excluded. [Embodiment] In Fig. 1, an LED 1 is mounted on an Al2〇3 carrier 2. The LED 〇 is provided with connection pads 3 and 3' for electrically connecting to the A1203 carrier 2. Similarly, the A120 3 carrier 2 is provided with connection pads 4 and 4'. In addition, the LED and the A1203 carrier can be provided with thermal pads 5 and 5, respectively, to provide an electrically connectable thermal connection. An Al2〇3 carrier having an LED is mounted on the aluminum sheet 6. Due to the excellent isolation properties of the Al2〇3 carrier, sufficient electrical isolation between the LED and the aluminum is achieved while providing sufficient thermal conductivity. Therefore, high voltage operation (>230V) can be used to reduce the down conversion of the voltage, thereby eliminating the loss during such conversion. The aluminum sheet 6 can be mounted to the groove 11' in the cooling unit 11.
❹ 200926883 中，將連同第3圖討論。 第2圖顯示安裝在鋁冷卻單元11上的LED陣 LED陣列包含四個子陣列7-7”’，各具有串連的12 LED。由對應的一條電線8-8”’餽送各子陣列。爲使圖开 楚，僅顯示電線與子陣列之連結點。由電線9提供共局 回路徑。電線連接至電性驅動器見第4圖。 第3圖描繪第2圖之冷卻單元11的剖面圖。在 中，爲了清楚而省略了安裝在鋁片6上的具有LED Al2〇3載體2，銘片6可安插在冷卻單元11中的溝槽 中。如所示，由LED所產生的熱量係運送到冷卻單元 側壁。電性驅動器1 〇係納入相同的殻體中。 第4圖顯示電性驅動器的一部分。驅動器係3 至電性網路之主電源（L =相位、N =零位、E =接地）。 橋式整流器B1整流來自主電源網路的電壓。共模線 TR1，加上電容器C1 ’用來將電性驅動器中產生的任何 換暫態與主電源隔離。電容器C2及C3用來整平經整浦 電壓，而電感器L1及L2用來補償這些電容器感生之 移。C2、C3、L1及L2之組合增加功率因數。 產生之電壓係餽送至電感器L3’其串聯式連接至 數個LED ( LED-1…LED-12 )。馳返式二極體D1放置 與此串連連結平行’使得對應的二極體’如LED-1 D1 ’爲反向平行。在LED-12的陰極側，以CON4表示 串連-平行組合係連接至n通道M〇SFET T1。電阻器 與T1串連且用於在T1的「啓通」狀態期間測量流 個 :清 丨返 .圖 之 11， 的 :接 由 圈 .切 ，的 相 複 成 及 ， R1 經 -12- 200926883 LED-1的電流，於後敘述。 T1的閘極係由電晶體-驅動器IC1驅動，如來自莫來 克斯 （Melexis ) 的 MLX1 0803 或來自超泰克斯 (Supertex )的HV 9910。在第4圖中所示的實施例中，使 用MLX10803，因此僅顯示MLX10803的相關接腳名稱。 接著，將詳細討論照明系統的操作。 作爲開始條件，假設T1爲開啓，如低歐姆。電流會 0 流經L3、LED-1..LED-12、T1及R1至接地。由於L3的 本質，此電流會逐漸增加，藉此在電感中儲存電磁能量。 使用R1上之電壓來感測流經LED-1的電流。此電壓係餽 送至IC1之Rsense接腳。一旦電流超過特定預定限度 (可用施加至 Vref接腳的電壓來調整此限度），電晶體 驅動器關閉T1。因此，電感會用流經LED-1..LED-12、D1 並回到L3之電流來開始釋放其磁性能量。 可使用IC1外部的構件及/或施加至接腳Vref的電壓 Φ 來調整最大電流以及將T1置於「關閉」狀態的時間。 在第4圖中，齊納二極體D2、電容器C4及電阻器 R2提供12V供應電壓給IC1。可調整分別連接至Irefl及 Iref2的外部構件C5與R3及C6與R4，以最佳化照明系 統之溫度特性。藉由構件C7與R5，可選擇IC1的振盪頻 率。此外，二極體D3可用來放電T1的閘極。可從1C 1之 應用註解中找到更多細節，因此相信無須更詳細說明。 最後，應注意到對熟悉該項技藝者明顯地可施加各種 修改及變更至連同本發明所述的實施例，而不背離在所附 -13- 200926883 之申請專利範圍中提出的本發明之範疇。 【圖式簡單說明】 參照附圖更詳細討論了本發明之實施例，圖中： 第1圖描繪跟劇本發明之LED-A1203載體-冷卻單元 總成之爆炸剖面圖； 第2圖顯示安裝在冷卻單元上之LED陣列的透視 〇 圖； 第3圖描繪第2圖之冷卻單元的剖面圖； 第4圖描繪第2圖之LED陣列用之電性電路的一部 分。 【主要元件符號說明】❹ 200926883 will be discussed in conjunction with Figure 3. Figure 2 shows an array of LED arrays mounted on an aluminum cooling unit 11 comprising four sub-arrays 7-7"', each having 12 LEDs connected in series. Each sub-array is fed by a corresponding one of the wires 8-8"'. To make the diagram open, only the connection points of the wires and subarrays are displayed. A common path is provided by the wires 9. Connect the wires to the electrical drive as shown in Figure 4. Fig. 3 is a cross-sectional view showing the cooling unit 11 of Fig. 2. In the above, the LED Al2 3 carrier 2 mounted on the aluminum sheet 6 is omitted for clarity, and the name sheet 6 can be inserted in the groove in the cooling unit 11. As shown, the heat generated by the LEDs is delivered to the side walls of the cooling unit. The electrical drive 1 is housed in the same housing. Figure 4 shows a portion of an electrical drive. Drive 3 is the mains supply to the electrical network (L = phase, N = zero, E = ground). The bridge rectifier B1 rectifies the voltage from the mains network. The common mode line TR1, plus capacitor C1', is used to isolate any switching transients generated in the electrical driver from the mains. Capacitors C2 and C3 are used to level the puddle voltage, while inductors L1 and L2 are used to compensate for the induced shift of these capacitors. The combination of C2, C3, L1 and L2 increases the power factor. The resulting voltage is fed to inductor L3' which is connected in series to a number of LEDs (LED-1...LED-12). The reciprocating diode D1 is placed in parallel with the series connection such that the corresponding diodes such as LED-1 D1 ' are antiparallel. On the cathode side of LED-12, a series-parallel combination is shown as CON4 connected to the n-channel M〇SFET T1. The resistor is connected in series with T1 and is used to measure the flow during the "on" state of T1: clearing back. Fig. 11,: connecting by circle, cutting, and recombination, R1 by -12-200926883 The current of LED-1 will be described later. The gate of T1 is driven by transistor-driver IC1, such as MLX1 0803 from Melexis or HV 9910 from Supertex. In the embodiment shown in Fig. 4, the MLX 10803 is used, so only the associated pin names of the MLX 10803 are displayed. Next, the operation of the lighting system will be discussed in detail. As a starting condition, assume that T1 is on, such as low ohms. The current will flow through L3, LED-1..LED-12, T1 and R1 to ground. Due to the nature of L3, this current is gradually increased, thereby storing electromagnetic energy in the inductor. The voltage across R1 is used to sense the current flowing through LED-1. This voltage is fed to the Rsense pin of IC1. Once the current exceeds a certain predetermined limit (the voltage applied to the Vref pin can be used to adjust this limit), the transistor driver turns off T1. Therefore, the inductor begins to discharge its magnetic energy with a current flowing through LED-1..LED-12, D1 and back to L3. The maximum current can be adjusted using the external components of IC1 and/or the voltage Φ applied to pin Vref and the time when T1 is placed in the "off" state. In Fig. 4, Zener diode D2, capacitor C4 and resistor R2 provide a 12V supply voltage to IC1. The external components C5 and R3 and C6 and R4, respectively connected to Iref1 and Iref2, can be adjusted to optimize the temperature characteristics of the illumination system. With the components C7 and R5, the oscillation frequency of IC1 can be selected. In addition, diode D3 can be used to discharge the gate of T1. More details can be found in the 1C 1 application note, so I don't think there is a need for more details. In the end, it should be noted that various modifications and changes can be made to the embodiments of the present invention without departing from the scope of the invention as set forth in the appended claims. . BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the present invention are discussed in more detail with reference to the accompanying drawings in which: FIG. 1 depicts an exploded cross-sectional view of the LED-A1203 carrier-cooling unit assembly of the present invention; A perspective view of the LED array on the cooling unit; Fig. 3 depicts a cross-sectional view of the cooling unit of Fig. 2; and Fig. 4 depicts a portion of the electrical circuit for the LED array of Fig. 2. [Main component symbol description]
1 : LED 2 :載體 〇 3、3’、 4、4:連接墊 5、導熱墊 6 :鋁片 7-7”’ ：子陣列 8_8”’、9 :電線 :電性驅動器 11 :冷卻單元 11’ ：溝槽 -14-1 : LED 2 : Carrier 〇 3, 3', 4, 4: Connection pad 5, Thermal pad 6: Aluminum plate 7-7"': Sub-array 8_8"', 9: Wire: Electrical drive 11: Cooling unit 11 ' : Groove-14-