M43f266 五、新型說明： 【新型所屬之技術領域】 本裝置為一種使用交流電源驅動的發光二極體驅動裝 置，以調整發光二極體燈串之串聯或並聯的方式，讓發光 二極體燈串在交流電源電壓的高低部分都可以導通。這不 僅僅可以提升發光二極體在直接以交流電壓驅動時的使用 率，還可以提升電源的使用效能。在與恆流電路一起使用 φ 時，更可以大量降低因交流電源電壓之變化所引起的發光 量變化。 【先前技術】 目前直接以交流市電驅動的發光二極體裝置，通常是 使用如中華民國專利M265741的方式。專利M265741的作 法是將發光二極體排列成橋式整流的形式或者雙向並聯的 方式，讓正負兩個半週可以直接導通，而且只需要加串一 # 個限流電阻即可。當電壓超過發光二極體的導通電壓 (Ked )之後，多餘的電壓經過限流電阻所產生的電流波 形如第一圖所示。其電流之計算公式如下：M43f266 V. New description: [New technical field] This device is a kind of LED driver driven by AC power supply. It can adjust the series or parallel connection of LED strings to make LEDs. The string can be turned on at the high and low parts of the AC power supply voltage. This not only improves the use of the LED when it is driven directly by AC voltage, but also improves the performance of the power supply. When φ is used together with the constant current circuit, it is possible to greatly reduce the variation in luminescence caused by the change in the AC power supply voltage. [Prior Art] At present, a light-emitting diode device directly driven by an AC mains is usually used in a manner such as the Republic of China patent M265741. The method of the patent M265741 is to arrange the light-emitting diodes in the form of bridge rectification or bidirectional parallel connection, so that the positive and negative two and a half weeks can be directly turned on, and only one string current limiting resistor can be added. When the voltage exceeds the turn-on voltage (Ked) of the light-emitting diode, the current waveform generated by the excess voltage through the current limiting resistor is as shown in the first figure. The formula for calculating the current is as follows:
其中的/為驅動發光二極體的電流值，K為輸入電壓 的瞬間值，則為發光二極體燈串的總導通電壓。 M4J1266 十為了月匕夠吸收大部分的電壓，都會需要串接 <另一個方向來看，這個發光二極 體燈串需要相當高的電壓才能讓發光二極體導通。這樣的 设計除了讓發光二極體的工作週期變低之外，其總發光量 逛很容易受交流電源電壓的變化影響。因為在交流電源電 Ή時’ K的峰值也會跟著下降，但是〜的值卻不會 改夂由上列公式的計算可以得知，絲驅動發光二極體 的電流會明顯的下降，如第二圖所示。第二圖之Μ麵 形的二個半遇分別為交流電源電壓在最高、中等與最低的 正半週波形。這三個波形之峰值的比例差異不大，但是他 們的電抓值差異部是非常大，因此會導致裝置的總發光量 有非常大的差異產生。 如果降低串接之發光二極體的數量，就可以減少裝置 的總發光量受交流電源電壓變化的影響，如第三圖所示。 與第二圖不同的’因為串接之發光二極體的數量已經減 少’所以第三圖的rLED值較低。從第二圖與第三圖的比較 可以發現’在一樣的交流電源電壓變化情形下，採用較少 2光二極體數量設計的驅動電流變化量比較小，亦即這種 沒计的裝置’其總發光量受交流電源電壓變化的影響會比 較小。 在交流電源電壓相同的條件下，採用較多發光二極體 串接數量的設計時，其電源使用效率比較高，如第四圖所 不。在第四圖⑷與第四圖⑻兩個圖之中的區域i與區域 4 Μ43ί266 4 ’其電源瞬間電壓值都低於發光二極體燈串之總導通電壓 厂LED，因此都是屬於發光二極體不導通的範圍。區域2則 都是在限流電阻上的壓降，而區域3則是在發光二極體上 的壓降。由於限流電阻與發光二極體是以串聯的方式連 接，所以會流過相同的電流，因此電壓面積的比值就可以 換异成限流電阻與發光二極體消耗功率的比值。The / is the current value of the driving diode, and K is the instantaneous value of the input voltage, which is the total conduction voltage of the LED string. M4J1266 Ten in order to absorb most of the voltage, it will need to be connected in series. In the other direction, this LED string requires a relatively high voltage to make the LEDs turn on. In addition to making the duty cycle of the LEDs low, such a design is easily affected by changes in the AC power supply voltage. Because the peak value of 'K' will decrease in the AC power supply, but the value of ~ will not change. It can be known from the calculation of the above formula that the current of the wire-driven LED will decrease significantly. The two figures are shown. The two halves of the second figure are the positive, half-cycle waveforms of the highest, medium, and lowest AC power supply voltages. The ratio of the peaks of these three waveforms is not much different, but their difference in the electric grab value is very large, which results in a very large difference in the total amount of illumination of the device. If the number of LEDs connected in series is reduced, the total amount of illumination of the device can be reduced by the variation of the AC supply voltage, as shown in the third figure. Unlike the second figure, 'the number of LEDs in series has been reduced', so the rLED value of the third figure is lower. From the comparison between the second figure and the third figure, it can be found that in the case of the same AC power supply voltage change, the amount of change in the drive current designed with a smaller number of two photodiodes is relatively small, that is, such a device that does not count The total amount of illumination is less affected by changes in the AC supply voltage. Under the condition that the AC power supply voltage is the same, when the design of the number of LEDs connected in series is adopted, the power supply efficiency is relatively high, as shown in the fourth figure. In the fourth picture (4) and the fourth picture (8), the area i and the area 4 Μ43ί266 4 'the instantaneous voltage value of the power supply are lower than the total on-voltage of the LED of the LED string, so they are all illuminated. The range in which the diode is not conducting. Zone 2 is the voltage drop across the current limiting resistor, while Zone 3 is the voltage drop across the LED. Since the current limiting resistor and the light emitting diode are connected in series, the same current flows, so the ratio of the voltage area can be changed to the ratio of the current limiting resistor to the power consumption of the light emitting diode.
口相較於第四圖⑻，第四圖⑷之中的％值比較高那 是因為串接的發光二極體數量比較多，因此其導通電塵也 會比較高，同時在限流電阻上的麼降就會比較低。所以第 四圖⑻之中區域2與區域3的面積比值就會比第四圖⑻之 中區域2與區域3的面積比率要來得低。換句話說，串接 較多發光二極體數量可以擁有較高的電源使用效率。 #反之，因為第四圖⑻之中的發光二極體導通週期會比 ::圖⑻之中,發光二極體導通週期來得高。因為串接的Compared with the fourth figure (8), the lower value of the fourth figure (4) is higher because the number of LEDs connected in series is higher, so the conduction dust will be higher, and at the same time on the current limiting resistor. The drop will be lower. Therefore, the area ratio of the area 2 to the area 3 in the fourth figure (8) is lower than the area ratio of the area 2 to the area 3 in the fourth figure (8). In other words, the number of LEDs connected in series can have higher power efficiency. # Conversely, because the light-emitting diode conduction period in the fourth figure (8) is higher than that in the -picture (8), the light-emitting diode conduction period is high. Because of concatenation
光二極體的工作週期也比較高。、導通週期比“，因此發 率，：了導通週期以便增加發光二極體燈串的使用 華民國專利公告㉟201037213以及 二極二:::=:::;_是__ 應的發光二極體段數導通:這同時分別讓相對 二極體燈串的使用率，類的作法雖然可以提升發光 的問題產生。w使得有不同導通週期 又洛的發光二極體燈串有不 5 Μ43ί266 同=的問題產生，這將會導致燈具上產生明顯的明暗 斑，·文。為了解決這㈣題’心須如同中錢國專利公告 =20广5的作法，以複雜的方式排列所有的發光二極 體，讓不同段落的發光二極體燈串裡的發光二極體均句分 佈’才能避免因為不同段落的不同導通週期產生的明暗斑 紋。然而這種設計不僅僅會增加發光二極體燈具設計的複 雜度’而且還必須㈣在發光二極體數量很多的發光二極 體燈串的條件下。因為在使用數量很少的高功率發光二極 體設計-個料二極體燈具時，要均勾分佈所有的發光量 並不容易。 因此，如能提出一種可以根據交流電壓的變化，以動 態的方式發光二極體燈串的串聯或並聯方式，就可以在提 升發光二極體燈•使用率以及電源使用效能的同時，讓每 一個分段的發光二極體燈串有相同的發光量之外，還可以 讓發光二極體燈具的設計複雜度降低，進而使得交流發光 φ 二極體裝置更適合於使用在照明的應用上。 【新型内容】 本案之主要目的在於提供一種可以直接使用交流電 源電壓驅動的發光二極體燈串驅動裝置，俾提供可以調整 兩個以上之發光二極體燈串之串聯或並聯的組態，以便同 時提升發光二極體燈串的使用週期與電源使用效率。 為此’本創作的主要目的’是提供一種能根據交流電 6 Μ43ί266 源的瞬時電壓之高低，決定兩個以上之二極體燈串的串聯 或並聯組態。當交流電源的瞬時電壓在較低電位時，讓發 光二極體燈串以並聯的方式連結，用以減少總串聯之發光 二極體的數量，進而降低總導通電壓，這樣就可以提升發 光二極體的使用週期。 當交流電源的瞬時電壓在較高電位時，讓發光二極體 燈串以串聯的方式連結，用以增加總串聯之發光二極體的 數量，進而增加總導通電壓，這樣就可以讓所有的電壓都 降在發光二極體燈串，並提升電源的使用效率。因為發光 二極體燈串之串聯或並聯組態的決定是以電壓為依據，所 以與工作頻率無關。因此運用這種技術所設計的發光二極 體交流驅動裝置，不論是在50 Hz、60 Hz或者由電子安定 器等等所產生更高頻的電源條件下，均可以正常動作。 透過橋式整流器的使用，本發光二極體交流驅動裝置 在交流電的正負半週均可驅動發光二極體，因此發光二極 體的使用效率會更高。要達到上述之功能，本發光二極體 交流驅動裝置包含有下列的零件： 一、 提供照明用發光二極體。 二、 橋式整流器，其目的是為了將具有正負的交流電整流 成脈動的直流，才能在正負半週都通過相同的發光二 極體，讓發光二極體的使用效率提昇。 三、 恆流電路，其目的為在發光二極體導通時，提供給發 光二極體穩定的驅動電流。 7 Μ43Γ266 四、 開關電路，其目的在於決定兩個以上的發光二極體燈 串之串聯或並聯的組態。 五、 電壓偵測電路，監測交流電源的瞬間電壓值，在瞬間 電壓值滿足設定的電壓值條件時，調整所有開關電路 的『導通』與『不導通』狀態，用以調整兩個以上之 發光二極體燈串之串聯或並聯的組態。 【實施方式】 實現本案特徵與優點的一些典型實施例，將在後段的 說明中詳細敘述。應理解的是本案能夠在不同的態樣上具 有各種不同的變化’皆不脫離本案的㈣，且其中的說明 及圖不在本貝上係當作本案的說明之用，而非用以限制本 案0The working period of the photodiode is also relatively high. , the conduction cycle ratio ", therefore the rate, the conduction period in order to increase the use of LED strings, the Republic of China patent announcement 35201037213 and the two poles two:::=:::; _ is __ should be the light dipole The number of body segments is turned on: this also allows the use of the relative diode string, although the class can improve the problem of illuminating. w makes the LEDs with different conduction periods and Luo have no 5 Μ43ί266 The problem of = is generated, which will result in obvious light and dark spots on the luminaire. In order to solve this (four) question, the heart must be arranged in a complicated way in accordance with the practice of the Chinese Patent Announcement = 20 Guang 5 The polar body allows the light-emitting diodes in different segments of the light-emitting diode string to be distributed in order to avoid the dark and dark markings caused by the different conduction periods of different paragraphs. However, this design not only increases the light-emitting diode lamps. The complexity of the design 'and must also (4) in the condition of a large number of light-emitting diode strings with a large number of light-emitting diodes, because the use of a small number of high-power light-emitting diode design - material diode lamp When it is not easy to distribute all the illuminating quantities, it is therefore possible to propose a series or parallel manner in which the diode strings can be illuminated in a dynamic manner according to changes in the alternating voltage, and the illuminating dipole can be raised. The body lamp, the usage rate and the power usage efficiency, so that each segment of the LED lamp string has the same amount of illumination, the design complexity of the LED lamp can be reduced, thereby making the AC illumination The φ diode device is more suitable for use in lighting applications. [New content] The main purpose of this case is to provide a light-emitting diode light string driving device that can be directly driven by an AC power supply voltage, and can provide two or more adjustments. The configuration of the series or parallel connection of the LED strings can be used to simultaneously improve the life cycle and power efficiency of the LED strings. The main purpose of this creation is to provide a source according to the AC 6 Μ43ί266 The instantaneous voltage level determines the series or parallel configuration of two or more diode strings. When the AC power is instantaneous When the voltage is lower, the light-emitting diode strings are connected in parallel to reduce the number of the LEDs in the total series, thereby reducing the total conduction voltage, thereby improving the life cycle of the LEDs. When the instantaneous voltage of the AC power source is at a higher potential, the LED strings are connected in series to increase the total number of LEDs in the series, thereby increasing the total conduction voltage, so that all The voltage drops on the LED string and improves the efficiency of the power supply. Because the decision of the series or parallel configuration of the LED string is based on voltage, it is independent of the operating frequency. The illuminating diode AC drive designed by the technology can operate normally at 50 Hz, 60 Hz or higher frequency power supply conditions generated by electronic ballasts and the like. Through the use of the bridge rectifier, the LED driving device can drive the LEDs in both positive and negative half cycles of the AC, so the use efficiency of the LEDs is higher. In order to achieve the above functions, the LED driving device of the present invention comprises the following components: 1. Providing a light-emitting diode for illumination. Second, the bridge rectifier, the purpose is to rectify the positive and negative alternating current into a pulsating direct current, in order to pass the same light-emitting diode in both positive and negative half cycles, so that the use efficiency of the light-emitting diode is improved. 3. The constant current circuit is designed to provide a stable driving current to the light emitting diode when the light emitting diode is turned on. 7 Μ43Γ266 IV. Switching circuit, the purpose of which is to determine the configuration of series or parallel connection of two or more LED strings. 5. The voltage detection circuit monitors the instantaneous voltage value of the AC power source. When the instantaneous voltage value satisfies the set voltage value condition, the “on” and “non-conduction” states of all the switch circuits are adjusted to adjust two or more illuminations. Configuration of series or parallel connection of diode strings. [Embodiment] Some exemplary embodiments for realizing the features and advantages of the present invention will be described in detail in the following description. It should be understood that the case can have various changes in different aspects', and the descriptions and figures are not used as the description of the case, rather than limiting the case. 0
第五圖所示之電路為本創作的第一實施例，本創作的 父流發光二極體驅動裝置2G包含有—個橋式整流η、一 個電壓偵測電路22、兩個恆流電路23、三個開關電路以 从及兩組具有相同串接數量之發光二極體燈串25。 橋式整流器21的正端與負端輸出之間並聯著三組電 弟—組為電㈣測電路22，第二組由上而下則是由第 二：先击:極體燈串25、第一開關電路以與第一，刚路 第Μ第二組由上而下則是由第三開關電路24、 弟-=二極體燈串25與第二值流電路。所串接而成。 在第一組與第二紐雷议+日9 Λ ，，且窀路之間連接著第二開關電路 8 Μ43Γ266 24，第二開關電路24是從第一發光二極體燈串25的下方 連接至第二發光二極體燈串25的上方。電壓偵測電路22 與三個開關電路24之間，分別有不同的控制線連接。 在這個交流發光二極體驅動裝置20啟動之後，不論 交流電源電壓如何變化，電壓偵測電路22會隨時偵測交流 電源電壓經由橋式整流21整流後的脈動直流電壓。在脈動 的直流電壓從0 V開始上升時，由於此時的電壓落在較低 的電壓範圍之中，因此電壓偵測電路22會對第二開關電路 • 24送出不導通的控制訊號，同時也對第一開關電路24與 第三開關電路24送出導通的控制訊號，此時電路的組態會 如同第六圖所示。 在這個組態之中，第一發光二極體燈串25的上方直 接連接至橋式整流21的正（+)端，其下方透過在導通狀 態的第一開關電路24與第一恆流電路23連接之後到達橋 式整流21的負（-)端。至於第二發光二極體燈串25則是 ^ 在其上方透過在導通狀態的第一開關電路24與橋式整流 21的正（+)端連接，其下方直接與第二恆流電路23連接 之後再到達橋式整流21的負（_)端。因此，這個組態的 兩組發光二極體燈事25會以並聯的方式連接，因此可以在 較低的電壓條件下就讓兩組發光二極體燈串25同時導通。 在這樣的工作條件下，就可以讓兩組發光二極體燈串 25的工作週期大幅地增加。換句話說，相較於中華民國專 利M265741的驅動方式，這樣的設計就可以讓發光二極體 9 Μ43Γ266 燈串25的工作週期大幅地提升。 如果U料龍總導通_的方式工作於整 升，以讓發光二極體燈串25的工作週期大幅地提 升可疋其電源的效率會變得非常地低。為了解The circuit shown in FIG. 5 is the first embodiment of the creation. The parent-emitting LED driving device 2G of the present invention includes a bridge rectifier η, a voltage detecting circuit 22, and two constant current circuits 23. The three switching circuits have the same series number of LED strings 25 from the two groups. Between the positive end and the negative end of the bridge rectifier 21, three sets of electric brothers are connected in parallel to the electric (four) measuring circuit 22, and the second group is from the top to the bottom: the first: the first strike: the polar body light string 25, The first switching circuit is connected to the first, the second group from the top to the second, and the third switching circuit 24, the second-second diode string 25 and the second value stream circuit. Made in series. The second switch circuit 8 Μ 43 Γ 266 24 is connected between the first group and the second neon + day 9 , , and the second switch circuit 24 is connected from below the first light-emitting diode string 25 . Up to the top of the second LED string 25. The voltage detecting circuit 22 and the three switching circuits 24 have different control line connections. After the AC LED driving device 20 is activated, the voltage detecting circuit 22 detects the pulsating DC voltage rectified by the AC rectification voltage 21 via the bridge rectification 21 at any time regardless of the change of the AC power supply voltage. When the pulsating DC voltage rises from 0 V, since the voltage at this time falls within a lower voltage range, the voltage detecting circuit 22 sends a non-conducting control signal to the second switching circuit 24, and also The first switching circuit 24 and the third switching circuit 24 send a conduction control signal, and the configuration of the circuit will be as shown in the sixth figure. In this configuration, the upper portion of the first LED array 25 is directly connected to the positive (+) terminal of the bridge rectifier 21, and the lower portion thereof is transmitted through the first switching circuit 24 and the first constant current circuit in the on state. After the connection 23, the negative (-) terminal of the bridge rectifier 21 is reached. As for the second LED array 25, the first switching circuit 24 in the on state is connected to the positive (+) terminal of the bridge rectifier 21, and the lower portion thereof is directly connected to the second constant current circuit 23. Then reach the negative (_) end of the bridge rectifier 21 again. Therefore, the two sets of LEDs 25 of this configuration are connected in parallel, so that the two sets of LED strings 25 can be simultaneously turned on at a lower voltage. Under such operating conditions, the duty cycle of the two sets of light-emitting diode strings 25 can be greatly increased. In other words, compared to the driving method of the Republic of China patent M265741, this design can greatly improve the working cycle of the light-emitting diode 9 Μ43Γ266 string 25. If the U-tube is always on, the working period of the LED string 25 is greatly increased, so that the efficiency of the power supply can be extremely low. For understanding
^電^貞測電路22會在脈動的直流電屋上升至足以同時 導、先一極體燈串25與第二發光二極體燈串25串聯 —通的較高電壓範圍時，電㈣測電路22會對第二開關電 路24送出導通的控制訊號， j $也對弟一開關電路24盥 二二=1電路24送出不導通的控制訊號，此時電路的組態 會如同第七圖所示。 在廷個組態之t，第一發光二極體燈串25的上方直 歸接至橋歧流21的正⑴#，其下转過在導通狀 怨的弟二開關電路2 4連接至第二發光二極體燈串2 $的上 方’再透過第二發光二極體燈串25下方的第二值流電路 23連接至橋式整流21的負㈠端。因此，這個組態的兩 組發光二極體燈串25會以串聯的方式連接，因此可以吸收 大部分的電壓，以便提升電源的使用效率。 透過电壓伯測電路22隨時備測交流電源電壓經由橋 式整流21整流後的脈動直流電壓，在不同電壓範圍以控制 三個開關電路24之導通與不導通狀態的方式來決定這兩 組發光二極體燈串25的串聯或並聯狀態之後，在發光二極 體燈串25上的壓降狀態如第八圖所示。 在第八圖之中的區域1與區域5，其電源瞬間電壓值 M43I266 都低於早一發光二極體燈串25之總導通電壓^並，因此 都疋屬於發光二極體燈串25不導通的範圍。區域2、區域 3與區域4則都是在悝流電路23上的壓降，而灰色部㈣ 區域6則是在發光二極體燈串25上的壓降。由於恆流電路 23與發光二極體燈串25是以串聯的方式連接，所以會流 過相同的電流，因此電壓面積的比值就可以換算成怔流電 路23與發光二極體燈串25之消耗功率的比值。 在第八圖之中灰色的部分為呈現在發光二極體燈_ 25上的電壓降。灰色區域之兩側電壓較低的部分，兩個發 光二極體燈串25是以並聯的方式連接，如第六圖所示，因 j發光二極體燈串25所需的導通電壓幻會比較低， 這樣才可以讓發光二極體燈串25獲得較大的工作週期。 在第八圖之中，灰色區域中間電壓較高的部分，兩個 發光二極體燈串25是以串聯的方式連接，如第七圖所示， 因此發光二極體燈串25所需的導通電壓合比較 南’這樣才可以獲得較高的電源使用效率。相較於第四圖 ⑷與第四圖⑻，第人圖之中於發光二極體燈串h的電壓 分佈狀態（灰色部分的區域6)，不僅僅其發光二極體料 25的工作週期較大，而且其電源使用率也比較高。 這種設計最重要的是可以讓兩個發光二極體燈串乃 不論是在低電壓的並聯狀態’或者高電壓的串聯狀態下， 都會有-致的導通週期，因此兩個發光二極體燈串h的發 光量會相同，所以不需要複㈣發光二極體燈串Μ佈局。 M43I266 換句話說’這種作法可以解決中華民國專利公告號 2〇1〇372丨3以及201Η)4915這兩種作法缺點。 第九圖所示之電路為本創作的第二實施例，本創作的 交流發光二極體驅動裝置2〇包含有—個橋式整流21、一 個電壓_電路22、四個恒流電路23、九個開關電路^ 以及四組具有相同串接數量之發光二極體燈串Μ。 橋式整流器21的正端與負端輸出之間並聯著五组電The electrical circuit 22 will rise when the pulsating DC house rises to a higher voltage range in which the first and second body light strings 25 are connected in series with the second light-emitting diode string 25 22 will send a conduction control signal to the second switching circuit 24, j $ also sends a non-conducting control signal to the second switching circuit 24 盥 22 = 24 circuit 24, and the configuration of the circuit will be as shown in the seventh figure. . In the configuration t, the first light-emitting diode string 25 is directly connected to the positive (1) # of the bridge flow 21, and the lower turn is connected to the second switch circuit 2 4 The upper portion of the two-light diode string 2$ is further connected to the negative (one) terminal of the bridge rectifier 21 via the second value stream circuit 23 below the second LED string 25. Therefore, the two sets of LED strings 25 of this configuration are connected in series, so that most of the voltage can be absorbed to improve the efficiency of the power supply. The voltage detection circuit 22 is ready to measure the pulsating DC voltage rectified by the AC power supply voltage via the bridge rectifier 21, and the two groups of LEDs are controlled in different voltage ranges to control the conduction and non-conduction states of the three switching circuits 24. After the series or parallel state of the polar body string 25, the voltage drop state on the light-emitting diode string 25 is as shown in the eighth diagram. In the area 1 and the area 5 in the eighth figure, the power supply instantaneous voltage value M43I266 is lower than the total on-voltage of the first light-emitting diode light string 25, and therefore, the light-emitting diode light string 25 does not The scope of conduction. Zone 2, Zone 3 and Zone 4 are both voltage drops across the choke circuit 23, while the Gray section (4) Region 6 is the voltage drop across the LED array 25. Since the constant current circuit 23 and the light-emitting diode lamp string 25 are connected in series, the same current flows, so that the ratio of the voltage area can be converted into the choke circuit 23 and the light-emitting diode string 25 The ratio of power consumed. The gray portion in the eighth figure is the voltage drop presented on the light-emitting diode lamp _25. In the lower part of the gray area, the two light-emitting diode strings 25 are connected in parallel, as shown in the sixth figure, because of the conduction voltage required for the LED light-emitting diode string 25 It is relatively low, so that the LED string 25 can be obtained with a large duty cycle. In the eighth figure, in the portion where the intermediate voltage is higher in the gray region, the two light-emitting diode strings 25 are connected in series, as shown in the seventh figure, so that the light-emitting diode string 25 is required. The turn-on voltage is compared to the south' to achieve higher power usage efficiency. Compared with the fourth figure (4) and the fourth figure (8), the voltage distribution state of the light-emitting diode string h in the first figure (the area 6 of the gray portion), not only the duty cycle of the light-emitting diode material 25 Larger, and its power usage is higher. The most important thing about this design is that the two LED strings can have a conduction period, whether in a low-voltage parallel state or a high-voltage series connection. Therefore, two LEDs are used. The amount of illumination of the light string h will be the same, so there is no need for a complex (four) light-emitting diode string arrangement. M43I266 In other words, this approach can solve the shortcomings of the two methods of the Republic of China Patent Bulletin No. 2〇1〇372丨3 and 201Η)4915. The circuit shown in the ninth figure is the second embodiment of the creation. The AC light-emitting diode driving device 2 of the present invention comprises a bridge rectifier 21, a voltage_circuit 22, and four constant current circuits 23. Nine switch circuits ^ and four sets of LEDs with the same number of series of LEDs. Five sets of electricity are connected in parallel between the positive terminal and the negative terminal of the bridge rectifier 21
路’第-組為電壓偵測電路22 ’第二组由上而下則是由第 一發光二極體燈串25、第-開關電路24與第—惶流電路 所串接而成。第三組由上而下則是由第三開關電路24、 弟二發光二極體燈串25、第四開關電路24與第二恆流電 路23所率接而成。第四組由上而下則是由第六開關電路 I第三發光二極體燈串25、第七開關電路24與第三值 机包路23所串接而成。第五組由上而下則是由第九開關電 路24、第四發光二極體燈串25與第四恒流電路23所串接 而成。 在第二組與第三組電路之間連接著第二開關電路 24’從第—發光二極體燈$ 25的下方連接至第二發光二極 體燈串25的上方。在第三組與第四組電路之間連接著第五 開關電路24,從第二發光二極體燈串25的下方連接至第 三發光二極體燈串25的上方。在第讀㈣聽電路之間 連接者第八開關電路24，從第三發光二極體燈$ 25的下 方連接至第四發光二極體燈串25的上方。電壓偵測電路 M43I266 22與九個開關電路24之間，分別有不同的控制線連接。 第九圖之中的四個發光二極體燈串25，透過電壓偵測 電路22控制所有開關電路24的導通與不導通之狀態，讓 交流電源電壓經由橋式整流21整流後的脈動直流電壓在 低、中與高三個電壓範圍之中，分別構成四並、兩串兩並 以及四串的連結組態，進而同時提升發光二極體燈串25的 工作週期以及電源的使用效率。其中的低電壓範圍為從0 V 到可以讓兩組發光二極體燈串25串聯時導通的電壓，中等 電壓範圍則是介於可以讓兩組發光二極體燈串25串聯時 導通的電壓與可以讓四組發光二極體燈串25串聯時導通 的電壓，至於可以讓四組發光二極體燈串25串聯時導通的 電壓以上之電壓範圍，均屬於高電壓範圍。為了完成上述 之功能，當瞬間電壓分別在低、中與高電壓範圍時，所有 開關電路的導通與不導通狀態如下表所示： SW, sw2 sw3 SW4 SW5 SW6 sw7 sw8 sw9 低範圍 ON OFF ON ON OFF ON ON OFF ON 中範圍 OFF ON OFF ON OFF ON OFF ON OFF 高範圍 OFF ON OFF OFF ON OFF OFF ON OFF 其中：『ON t g代表 『導通t 〇 > r OF F』代表『不马 ^通』。 除了第五圖與第九圖所示，將發光二極體燈串25分 別分成兩組與四組具有相同串接數量之發光二極體燈串25 之外，還可以採用其他的分段方式，以滿足設計之需求。 綜上所述，本案提供一種直接交流驅動之發光二極體 13 M431*266 驅動電路，由於其係無須設置變壓器及高耐壓之大電容， 故具有可減少生產成本之功效。此外，藉由將發光二極體 燈串25分段成多組具有相同串接數量之發光二極體燈串 25的方式與配合恆流電路的使用，不僅僅可以提升發光二 極體燈串25的工作週期，更可以提升電源的使用效率。是 以，本案之發光二極體驅動電路極具產業之價值，爰依法 提出申請。 本案得由熟知此技術之人士任施匠思而為諸般修飾， 然皆不脫如附申請專利範圍所欲保護者。 【圖式簡單說明】 第一圖、在輸入交流電源電壓穩固定時，經由橋式整流器 整流輸出之電壓波形圖V與採用限流電阻所產生之 驅動電流I。 第二圖、在輸入交流電源電壓不穩定以及使用較多發光二 極體串接時，經由橋式整流器整流輸出之電壓波形 V與採用限流電阻所產生之驅動電流波形I。 第三圖、在輸入交流電源電壓不穩定以及使用較少發光二 極體串接時，經由橋式整流器整流輸出之電壓波形 V與採用限流電阻所產生之驅動電流波形I。 第四圖、相同交流電源電壓在不同發光二極體串接數量 時，分佈於限流電阻與發光二極體的電壓。 第五圖、本創作之第一實施例。 第六圖、本創作之第一實施例之電源電壓瞬間值在較低電 壓範圍時的並聯組態。 第七圖、本創作之第一實施例之電源電壓瞬間值在較高電 壓範圍時的串聯組態。 第八圖、本創作之第一實施例在發光二極體上電壓降狀態。 第九圖、本創作之第二實施例。 Μ43Γ266 【主要元件符號說明】 20:交流發光二極體驅動裝置 21 :橋式整流器 22 :電壓偵測電路 23 :開關電路 24 :恆流電路 25 :發光二極體燈串 φ SW,:第一開關電路 SW2 :第二開關電路 SW3 :第三開關電路 SW4 :第四開關電路 SW5 :第五開關電路 SW6 :第六開關電路 SW7 :第七開關電路 SW8 :第八開關電路 ® SW9 :第九開關電路 CC,:第一恆流電路 CC2 :第二恆流電路 CC3 :第三恆流電路 CC4 ··第四恆流電路 LEDSi :第一發光二極體燈串 UEDS2:第二發光二極體燈串 16 Μ43Ϊ266 LEDS3 :第三發光二極體燈串 LEDS4 :第四發光二極體燈串The second group of voltage detection circuits 22' is composed of a first LED array 25, a first switching circuit 24 and a first choke circuit. The third group is formed by the third switch circuit 24, the second light-emitting diode string 25, the fourth switch circuit 24 and the second constant current circuit 23 from top to bottom. The fourth group is formed by connecting the third switch circuit I, the third light-emitting diode string 25, the seventh switch circuit 24, and the third check-in path 23 from top to bottom. The fifth group is formed by connecting the ninth switching circuit 24, the fourth LED array 25 and the fourth constant current circuit 23 from top to bottom. A second switching circuit 24' is connected between the second group and the third group of circuits to be connected from below the first light-emitting diode lamp $25 to the second light-emitting diode string 25. A fifth switch circuit 24 is connected between the third group and the fourth group of circuits, and is connected from above the second light-emitting diode string 25 to the upper side of the third light-emitting diode string 25. The eighth switch circuit 24 of the connector between the first (four) listening circuits is connected from the lower side of the third light-emitting diode lamp $25 to the upper side of the fourth light-emitting diode string 25. The voltage detection circuit M43I266 22 and the nine switch circuits 24 have different control line connections. The four LED arrays 25 in the ninth diagram, the voltage detecting circuit 22 controls the conduction and non-conduction states of all the switching circuits 24, and the pulsating DC voltage rectified by the AC power supply voltage via the bridge rectifier 21 Among the three voltage ranges of low, medium and high, respectively, four, two, two and four strings are connected, thereby simultaneously improving the working period of the light-emitting diode string 25 and the use efficiency of the power source. The low voltage range is from 0 V to the voltage that can be turned on when the two sets of LED strings 25 are connected in series, and the medium voltage range is the voltage that is turned on when the two sets of LED strings 25 are connected in series. The voltage that is turned on when the four groups of the light-emitting diode strings 25 can be connected in series, and the voltage range above which the voltages of the four groups of the light-emitting diode strings 25 are connected in series are all in the high voltage range. In order to perform the above functions, when the instantaneous voltage is in the low, medium and high voltage ranges, the conduction and non-conduction states of all the switching circuits are as follows: SW, sw2 sw3 SW4 SW5 SW6 sw7 sw8 sw9 Low range ON OFF ON ON OFF ON ON OFF ON Medium range OFF ON OFF ON OFF ON OFF ON OFF High range OFF ON OFF OFF ON OFF OFF ON OFF Where: "ON tg stands for "Conduction t 〇> r OF F" stands for "不马^通" . In addition to the fifth and ninth diagrams, the light-emitting diode string 25 is divided into two groups and four groups of light-emitting diode strings 25 having the same number of series, and other segmentation methods can be adopted. To meet the needs of the design. In summary, the present invention provides a direct AC driven LED 13 M431*266 driving circuit, which has the effect of reducing the production cost because it does not need to be provided with a transformer and a large capacitor with high withstand voltage. In addition, by segmenting the LED array 25 into a plurality of sets of LEDs 25 having the same number of series and the use of a constant current circuit, not only the LED string can be improved. The working cycle of 25 can improve the efficiency of power supply. Yes, the light-emitting diode drive circuit of this case is of great industrial value, and the application is made according to law. This case has been modified by people who are familiar with the technology, and is not intended to be protected by the scope of the patent application. [Simple description of the diagram] The first figure shows the voltage waveform V of the rectified output via the bridge rectifier and the driving current I generated by the current limiting resistor when the input AC power supply voltage is stable. In the second figure, when the input AC power supply voltage is unstable and a plurality of light-emitting diodes are connected in series, the voltage waveform V of the output is rectified via the bridge rectifier and the drive current waveform I generated by the current limiting resistor. In the third figure, when the input AC power supply voltage is unstable and the LEDs are connected in series, the voltage waveform V of the output is rectified via the bridge rectifier and the drive current waveform I generated by the current limiting resistor. In the fourth figure, the same AC power supply voltage is distributed between the current limiting resistor and the light emitting diode when the number of different light emitting diodes is serially connected. Fifth figure, a first embodiment of the present creation. Fig. 6 is a diagram showing the parallel configuration of the instantaneous value of the power supply voltage in the first embodiment of the present invention in the lower voltage range. Fig. 7 is a series configuration of the power supply voltage instantaneous value of the first embodiment of the present invention in a higher voltage range. The eighth figure, the first embodiment of the present invention, is in a voltage drop state on the light emitting diode. The ninth figure, the second embodiment of the present creation. Μ43Γ266 [Description of main component symbols] 20: AC LED driver 21: Bridge rectifier 22: Voltage detection circuit 23: Switching circuit 24: Constant current circuit 25: LED string φ SW, first Switch circuit SW2: second switch circuit SW3: third switch circuit SW4: fourth switch circuit SW5: fifth switch circuit SW6: sixth switch circuit SW7: seventh switch circuit SW8: eighth switch circuit® SW9: ninth switch Circuit CC, first constant current circuit CC2: second constant current circuit CC3: third constant current circuit CC4 · fourth constant current circuit LEDSi: first light emitting diode string UEDS2: second light emitting diode lamp String 16 Μ43Ϊ266 LEDS3: Third LED Diode String LEDS4: Fourth LED Diode String
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