TW201011945A - Light emitting diode driving device and light system - Google Patents
Light emitting diode driving device and light system Download PDFInfo
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201011945 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種發光二極體驅動裝置，且特別是有 5201011945 IX. Description of the Invention: [Technical Field] The present invention relates to a light-emitting diode driving device, and particularly has 5
15 20 關於一種增加保護單元以避免光源模組被燒毀之驅動裝置及 照明系統。 【先前技術】 發光二極體（Light Emitting Diode，簡稱 LED)誕生 在1960年代’從紅光LED、綠光LED ’ 一路開發到藍光LED， 直到1998年才真正看到將LED商品化。LED具有省電、開關 ，度快等功能，目前LED大量應用在指示功能，而該領域也 是LED最先進入的市場，如戶外顯示板、交通號誌燈及平面 照明等。隨著高階手機採用LED當背光源後，LED又打開了 新的應用領域。 目刖，LED的應用範圍相當廣，由早期手機、小型裝置 ^遙控器等，到近年因高亮度LED出現，應用範圍則擴大至 車二照明、戶外大型顯示器等產品。另外，由於LED應用 於顯不光源及背光源具高色彩飽和度、快速啟動、無汞及壽命 長等優點，故顯示器為LED下一步具發展潛力產品。 請參照第4圖，其係繪示習知一種照明系統之電路方 塊圖。此照明系統400係包括驅動裝置4〇6、光源模組4〇8。 而此照明系統4〇〇係透過整流器404接收交流電源4〇2所 =給$流電壓。驅動裝置·包括開關單元412、迴授 ^ 控制單元418、時序同步單元娜以及亮度控制 舟神。鑛所減之交流電壓轉換成時序同 鬥耗接至時序同步單元420，並依據時序 同步^叙時序輸出調整訊號至開關單it 412。開關單元412 25 201011945 515 20 About a drive unit and lighting system that adds a protection unit to prevent the light source module from being burnt. [Prior Art] Light Emitting Diode (LED) was born in the 1960s. From the development of red LEDs and green LEDs to blue LEDs, it was not until 1998 that commercial LEDs were actually commercialized. LEDs have functions such as power saving, switching, and fast. Currently, LEDs are widely used in indicating functions, and this field is also the market where LEDs are the first to enter, such as outdoor display panels, traffic lights, and flat lighting. As high-end phones use LEDs as backlights, LEDs have opened up new applications. It is seen that LEDs have a wide range of applications, from early mobile phones, small devices, remote controls, etc., to high-brightness LEDs in recent years, and the application range has expanded to include car lighting and outdoor large-scale displays. In addition, since the LED is applied to the display light source and the backlight with high color saturation, quick start, no mercury and long life, the display is the next step for the development of LED products. Referring to Figure 4, there is shown a circuit block diagram of a conventional illumination system. The illumination system 400 includes a driving device 4〇6 and a light source module 4〇8. The illumination system 4 receives the AC power supply 4〇2 through the rectifier 404 to give a current voltage. The driving device includes a switching unit 412, a feedback control unit 418, a timing synchronization unit Na, and a brightness control boat god. The AC voltage reduced by the mine is converted into a timing synchronism to the timing synchronization unit 420, and the adjustment signal is output to the switch unit it 412 according to the timing synchronization timing. Switch unit 412 25 201011945 5
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20 耦接於整流器404與光源模組408之間。當開關單元412接收 到此調整訊號後，會依據調整訊號之狀態（亦即邏輯高準位或 邏輯低準位）來決定是否將交流電壓提供至光源模組4〇8，以 使光源模組408產生光源。迴授單元416耦接於光源模組408 與控制單元418之間，並檢測光源模組408之負載狀態（例如 是光源模組408之電流值），再依據檢測結果輸出迴授訊號至 控制單元418。 當控制單元418接收迴授訊號後，會先自亮度控制裝置 422中取得一預設亮度值。此預設亮度值可由使用者視需求自 行調整。之後，控制單元418則將迴授訊號與預設亮度值作比 對’以作為調整訊號之脈寬的依據。 【發明内容】 本發明的目的就是在提供一種發光二極體驅動裝置以 ^照明系統’其係可根據光源模組之負載狀態來決定是否斷開 光源模組與交流電源之間的連結。 本發明的目的就是在提供一種發光二極體驅動裝置以 及=明系統，其係可根據光源模組之負載狀態以及光源模組的 目則亮度來決定是否斷開光源模組與交流電源之間的連結。 本發明提出一種發光二極體驅動裝置，其係電性耦接 $一交流電源與一光源模組，且此交流電源係輸出一交流電 。此發光二極體驅動裝置包括整流器、迴授單元、保護單 1開關單it、時序單元以及控制單元。上述之整流器係°電性 ，，至父流，源與光源模組，以將交流電壓供給至光源模組。 故授單祕電絲接^光賴組’峨觀根據光源模 二一，載狀態產生一迴授訊號，並輸出迴授訊號。上、 迴授單元，且接收迴授訊號，且以迴授: 建之_參考電壓相味，並輸出—切換訊號。上 疋之開關早70具有第一端、第二端與第三端，開關單元之第一 25 201011945 交 =源’開鮮元之第二端係電性麵接至光 早7^第二端係電性墟至保護單元，並接收及 或斷開交流電源與光源模組之連結。上述 門牛.軍^ 接至交流電源，並擷取及對交流電壓作一 ==¾步=上述之控制單元係_ 一調整運算，輯糾辆步訊號作 訾丨 15 m 20 電壓^ _述，賴_、接收-參考 贈、笛、：ri«r制喊匕保護單元包括比較器、第一電晶 以及輸ί端，比ΐΐϊΐ?器係具有第一輸入端、第二輸入端 if:ϊ?接收該參考電壓。上述之第三電阻具有第-端 」電了體端係接收第—控制訊號。上述之第 集極 之第二端，第-係電 地麵接較輸μ ’第—電晶體之射極端係電性耦接至 t流電壓供鞋絲·。上叙峨單⑽、t⑽、接至# 輸出迴授峨。上狀^料轉馳接城3^|20 is coupled between the rectifier 404 and the light source module 408. When the switch unit 412 receives the adjustment signal, it determines whether to provide the AC voltage to the light source module 4〇8 according to the state of the adjustment signal (ie, the logic high level or the logic low level), so that the light source module 408 produces a light source. The feedback unit 416 is coupled between the light source module 408 and the control unit 418, and detects the load state of the light source module 408 (for example, the current value of the light source module 408), and then outputs a feedback signal to the control unit according to the detection result. 418. When the control unit 418 receives the feedback signal, it first obtains a preset brightness value from the brightness control device 422. This preset brightness value can be adjusted by the user as needed. Thereafter, the control unit 418 compares the feedback signal with the preset brightness value as the basis for adjusting the pulse width of the signal. SUMMARY OF THE INVENTION An object of the present invention is to provide a light-emitting diode driving device that can determine whether to disconnect a light source module from an AC power source according to a load state of a light source module. The object of the present invention is to provide a light-emitting diode driving device and a system for determining whether to disconnect the light source module from the AC power source according to the load state of the light source module and the brightness of the light source module. Link. The invention provides a light-emitting diode driving device electrically coupled to an AC power source and a light source module, and the AC power source outputs an AC power. The LED driving device comprises a rectifier, a feedback unit, a protection single switch single it, a timing unit and a control unit. The rectifier described above is electrically connected to the parent, source and light source modules to supply an alternating voltage to the light source module. Therefore, the single secret wire is connected to the light-receiving group. According to the light source mode, the load state generates a feedback signal and outputs a feedback signal. The upper and lower feedback units receive the feedback signal and are fed back: the built-in reference voltage and the output-switching signal. The upper switch 70 has a first end, a second end and a third end, and the first 25 of the switch unit 201011945 cross=source's second end of the fresh element is electrically connected to the light early 7^ second end The electrical market is connected to the protection unit and receives and disconnects the AC power source from the light source module. The above-mentioned door cow. Army ^ is connected to the AC power supply, and draws and makes an AC voltage ==3⁄4 step = the above control unit system _ an adjustment operation, the correction step signal is 訾丨15 m 20 voltage ^ _ , Lai _, receiving - reference gift, flute, : ri «r system shouting protection unit includes a comparator, a first crystal and a ί terminal, the comparator has a first input, a second input if: ϊ? Receive this reference voltage. The third resistor has a first-end electrical terminal that receives the first control signal. At the second end of the collector pole, the first-stage electrical ground is electrically coupled to the emitter pole of the input transistor to the t-stream for the shoe wire. The above-mentioned list (10), t (10), and the # output feedback authorization. The top shape turns to the city 3^|
i?ssP 收迴授訊號，肋輯魏號與倾單 雷 =，並輸出-切換訊號。上述之·單目 元端端:端係電性耦接$交咖，&單 耦接至保護單元，並接收及根據切換訊號用以連I;斷開j流 25 201011945 5i?ssP recovers the signal number, ribs the Wei number and the dumping unit, and outputs the - switching signal. The above-mentioned monocular end: the end is electrically coupled to the $, and the single is coupled to the protection unit, and receives and is connected to the I according to the switching signal; disconnects the j stream 25 201011945 5
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20 電源與光源模組之連結。 依照本發_較佳倾騎述，賴單元係接 壓與迴授峨，且倾單元包括—比較器。此比較器係具^ =入端、第二輸人端以及輸丨端，味^之第—輸又端 至迴授單元，並接收迴授訊號，比較器 端 接收參考電壓。 布刑八峒係 本發明再提出-種發光二極體驅動裝置，其係電性 至交流電源與絲模組，且賴電賴輸蚊流電壓。此 一極體驅動裝置包括整流器、迴授單元、控制單元、^ =及_單元。上狀錢祕電性_至交流電源與光源 才、、且，以將交流電壓供給至光源模組。上述之迴授單元係電性 輕接至光源模纟1，以檢測及根據光源模組之貞載狀態產生迴授 訊號、，並輸_授峨。上狀控鮮元__接至迴授^ 並接收及輸出迴授訊號’且控制單元係以迴授訊號與 值作比較，以產生第—比較絲。上述之健單元係電 J麵，至控财元’並接收峨職錢第—比較結果保護 係以迴授峨與參考電壓相比，以產生第二比較結果，保 ^平凡則根據第-及第二比較結果，以產生及輸出一切換訊 t上述之開關單元具有第—端、第二端與第三端，開關單元 接至交流電源，開關單元之第二端係電性搞 =至先源模組’關單元之第三端係電_接至保護單元，並 2及根據機訊_以連接或_交流電源與光源模組之 連結。 ^發明再提出—種照鳴統，其係電性辆接至交流電源， 且父〜電源係輸出交流電屢。光源系统包括杨模组以及發光°上述之光源模組係電性_至交流電源， 麗。上述之發光二極體驅動裝置係電性耦接至 父〜電源與光賴組，且包括紐器、迴授單元、保護單元以 25 201011945 端係 及開關單70巾，整流⑽電_接至錢 組，以將交流電壓供給至統她。迴料元係電性 源模組’讀麻根觀賴組之貞触㈣生峨訊H 輸出迴授城。保護單元係電性她至迴授單元，收梅 訊號，用⑽碰峨與賴單元内建之—參考賴相U 輸出-切換訊號。開關單元具有第—端、第二端與第 ^ 關單元之第-端係電性雜接至交流電源，開關單^之第幵 並接收及根據切換訊制贿接或斷開交㈣源與^源 組之連結。 為讓本發明之上述和其他目的、舰和優雖更明顯 易懂，下文特舉一較佳實施例，並配合所附圖式，作詳細 說明如下。 v 【實施方式】 ΐ性，f至55·?組，關單元之第三端係電性雛至保護單20 Power and light source module connection. According to the present invention, the preferred unit is coupled to the feedback unit, and the tilt unit includes a comparator. The comparator has a ^=input terminal, a second input terminal and a transmission terminal, and the first and second ends of the comparator are connected to the feedback unit, and receive the feedback signal, and the comparator receives the reference voltage. The present invention further proposes a light-emitting diode driving device which is electrically connected to an alternating current power source and a wire module, and which relies on a mosquito flow voltage. The one-pole driving device includes a rectifier, a feedback unit, a control unit, a ^= and a _ unit. The upper battery is _ to the AC power source and the light source, and the AC voltage is supplied to the light source module. The feedback unit is electrically connected to the light source module 1 to detect and generate a feedback signal according to the load state of the light source module, and to transmit the signal. The upper control unit __ is connected to the feedback ^ and receives and outputs the feedback signal ' and the control unit compares the feedback signal with the value to generate the first comparison wire. The above-mentioned health unit is the J-face, to the control of the financial unit 'and receives the dereliction of duty - the comparison result protection system is compared with the reference voltage to generate the second comparison result, to ensure that the ordinary is based on the - and The second comparison result is to generate and output a switching signal. The switching unit has a first end, a second end, and a third end, and the switch unit is connected to the AC power source, and the second end of the switch unit is electrically connected. The third end of the source module 'off unit is connected to the protection unit, and 2 is connected to the light source module according to the machine_connection or _AC power. ^Invented again - a kind of photo system, which is connected to the AC power supply, and the parent ~ power supply output AC. The light source system includes a Yang module and a light source module. The light source module is electrically connected to an AC power source. The above-mentioned light-emitting diode driving device is electrically coupled to the parent-power source and the light-receiving group, and includes a button, a feedback unit, and a protection unit with 25 201011945 end system and a switch single 70 towel, and rectifies (10) electricity to Money group to supply AC voltage to her. The return element is an electrical source module. The protection unit is electrically connected to the feedback unit, and receives the signal, using (10) touch and the built-in unit - reference to the Lai phase U output-switching signal. The switch unit has a first end, a second end, and a first end of the second switch unit electrically connected to the AC power source, and the switch unit receives and receives and switches or disconnects according to the switching information. ^The link of the source group. In order to make the above and other objects, advantages and advantages of the present invention more apparent, the following detailed description of the preferred embodiments and the accompanying drawings are set forth below. v [Embodiment] ΐ, f to 55·? group, the third end of the unit is electrically connected to the protection list
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模 請參照第1A圖是繪示依照本發明一較佳實施例的一 種照明系統之電路方塊圖。此照明系統1〇〇係包括 極體驅動裝置106以及光源模組1〇8。 _在本發明之較佳實施例中，光源模組108例如是發光 =極體陣列或是單一的發光二極體，其數量自當不以此為 :二另外，發光二極體可以例如是由直流電壓所驅動之發 光二極體或是由交流電壓所驅動之發光二極體。 此發光二極體驅動裝置106包括整流器1〇4、開關單元 一 2、保護單元114、迴授單元116、控制單元118以及時序單 =120。在本實施例中，迴授單元U6係電性耦接至光源模組 與保護單元114，以檢測及根據光源模組1〇8之一負載狀 生一迴授訊號，並輸出迴授訊號。其中，此迴授訊號係例 如是流經光源模組108之電流值。 其中，整流器104係電性耦接至交流電源1〇2，並接 9 25 201011945 收一交流電懕，田 此技藝者可缸在整流過後輸出交流電壓。而如熟悉 被包含在發整流器104可以例如是不需配置、 設計時之需動裝置106之内或之外，其自當視 5 ❿1〇 15 ❹ 20 以迴S二^接=授單元116所傳來之迴授訊號’並 根據比較結果::早建之-參考電壓相比較。接著’ 訊號所代表至開關單元112。其中，若迴授 # r電流值大於參考電壓，可以例如是輸出邏輯低準 間t ί訊號’靖開交流電源102與光源模組 者雷懕3遴、、、°，反之，若迴授訊號所代表之電流值小於參 I l m例如是輸出邏輯高準位（或邏輯低準位）之訊號， 接或保持交流電源102與光源模組108間之電性連結。 11? 具有第—端、第二端與第三端。開關單元 第^鳊係電性耦接至交流電源102 (透過整流器丨〇4)， :19早二―112之第二端係電性輕接至光源模組⑽，開關單元 電性祕至倾單元114，並魏及根據切換 3儿 連接或斷開交流電源102與光源模組1 〇8之連結。 時序單το 120係電性耦接至交流電源1〇2 (透過整流器 1〇^，並根巧一預設週期满取整流器104所輸出之交流電壓。 其次，時序單元120將對所擷取到之交流電壓作一同步運算， 並產生及輸出-時序同步訊號。其巾，時相步峨係欲使光 源模組108工作週期與交流電壓之週期能匹配。 控制單元118係電性柄接至時序單元12〇與保護單元 114，並接收及對時序同步訊號作一調整運算，以&出'二 調整訊號。 其申，開關單元112接收到時序調整訊號時，則根據時序 調整訊號之準位決定斷開整流器104與光源模組1〇8之電性連 結的時序，以調整供給至光源模組108之交流電壓的脈寬。 25 201011945 整流器104係為對交流電源102所傳來之交流電壓作定電 壓與濾波後輸出，以使光源模組108可以在更為穩定之電壓下 工作。其中，整流器104可以例如是橋式整流器，但不以此為 限。 請繼續參照第1A圖，此照明系統之操作方法為整流器104 接收及對交流電源102所供給之交流電壓作濾波整流後輸 出。光源模組108則根據開關單元112是否已與交流電源1〇2 (透過整流器104)作電性連結。若是，則交流電源1〇2_整流 器104-開關單元112-光源模組108-整流器104-交流電源1〇2 #° 將形成一迴路，故只要交流電壓足以驅動光源模組1〇8時，光 源模組108將發光。 此時，當光源模組108被驅動後，迴授單元116將可測得 光源模組108之迴授電流值，並將迴授電流值所相對應之迴授 訊號輸出至保護單元114。保護單元114則以此迴授訊號與内 15 ，之參考電壓相比較，並輸出一切換訊號至開關單元112。接 > 山0…一'… 20 著’關單元112則根據此切換訊號決定是否切斷光源模組 108至交流電源102間之迴路。另外，時序單元12〇則擷取及 根據整流器,1()4所輸出之交流電壓，並於進行同步運算後，輸Modes Referring to Figure 1A, a block diagram of a lighting system in accordance with a preferred embodiment of the present invention is shown. The illumination system 1 includes a polar body driving device 106 and a light source module 1〇8. In the preferred embodiment of the present invention, the light source module 108 is, for example, an illuminating body array or a single illuminating diode. The number of the light source module 108 is not the same as that of the second embodiment. A light-emitting diode driven by a DC voltage or a light-emitting diode driven by an AC voltage. The LED driving device 106 includes a rectifier 1〇4, a switching unit-2, a protection unit 114, a feedback unit 116, a control unit 118, and a timing list=120. In this embodiment, the feedback unit U6 is electrically coupled to the light source module and the protection unit 114 to detect and generate a feedback signal according to the load of one of the light source modules 1 and 8 and output a feedback signal. The feedback signal is, for example, a current value flowing through the light source module 108. Wherein, the rectifier 104 is electrically coupled to the AC power source 1〇2, and is connected to the 9 25 201011945 to receive an AC power, and the technician can output the AC voltage after the rectifier is rectified. As is familiar to be included in the hair rectifier 104, for example, within or outside the demand device 106, which is not required to be configured or designed, it is considered to be 5 ❿ 1 〇 15 ❹ 20 to return to S ^ 接 = to the unit 116 The feedback signal passed from 'and according to the comparison result:: built early - the reference voltage is compared. The signal is then represented to switch unit 112. Wherein, if the current value of the feedback #r is greater than the reference voltage, for example, the output logic low level t ί signal 'Jingkai AC power source 102 and the light source module device Thunder 3遴, ,, °, and vice versa, if the feedback signal The current value represented by the reference is less than the signal of the output logic high level (or logic low level), and the electrical connection between the AC power source 102 and the light source module 108 is connected or maintained. 11? has a first end, a second end and a third end. The switch unit is electrically coupled to the AC power source 102 (through the rectifier 丨〇4), and the second end of the 19th-112 is electrically connected to the light source module (10), and the switch unit is electrically secreted. The unit 114 connects and disconnects the AC power source 102 from the light source module 1 〇8 according to the switch 3. The timing unit το 120 is electrically coupled to the AC power source 1〇2 (through the rectifier 1〇, and the AC voltage outputted by the rectifier 104 is completed by a predetermined period. Next, the timing unit 120 will capture the pair. The AC voltage is used for a synchronous operation, and the output-timing synchronization signal is generated. The towel, the phase step is to match the duty cycle of the light source module 108 with the period of the AC voltage. The control unit 118 is electrically connected. And to the timing unit 12 and the protection unit 114, and receive and adjust the timing synchronization signal to & output the second adjustment signal. When the switch unit 112 receives the timing adjustment signal, the signal is adjusted according to the timing. The timing determines the timing of disconnecting the electrical connection between the rectifier 104 and the light source module 1 8 to adjust the pulse width of the AC voltage supplied to the light source module 108. 25 201011945 The rectifier 104 is transmitted to the AC power source 102. The AC voltage is used as a constant voltage and a filtered output, so that the light source module 108 can operate at a more stable voltage. The rectifier 104 can be, for example, a bridge rectifier, but not limited thereto. Continuing to refer to FIG. 1A, the illumination system is operated by the rectifier 104 receiving and filtering and rectifying the AC voltage supplied from the AC power source 102. The light source module 108 is based on whether the switch unit 112 has been connected to the AC power source 1〇2 ( The electrical connection is made through the rectifier 104. If so, the AC power supply 1〇2_rectifier 104-switch unit 112-light source module 108-rectifier 104-AC power supply 1〇2 #° will form a loop, so as long as the AC voltage is sufficient When the light source module 1〇8 is driven, the light source module 108 will emit light. At this time, after the light source module 108 is driven, the feedback unit 116 can measure the feedback current value of the light source module 108, and feedback The feedback signal corresponding to the current value is output to the protection unit 114. The protection unit 114 compares the feedback signal with the reference voltage of the internal 15 and outputs a switching signal to the switching unit 112. Connected > A '20' 'off unit 112 determines whether to cut off the circuit between the light source module 108 and the AC power source 102 according to the switching signal. In addition, the timing unit 12〇 extracts and outputs according to the rectifier, 1()4. AC voltage, and After synchronization operation, input
此迴授單元116係包括第五電阻以 容C1以及二極體D1。 此第五電阻R5係具有第 第六電阻R6、電 V有第一端與第二 201011945 端。第五電阻R5之第一她及恭以 電阻把之第二端係|性=電性输至光源模組⑽，第五 第-輸入端。電性輪至賴單元114之比較器132之 第六電阻R6具有第—@_ 端係電性耦接至第五電：六電阻R6之第-端係電性耦接至地。 之第一鳊，第六電阻R6之第二 輕接至第五電阻Rf之=與:-端。電容C1之第-端係電性 二極體D1之第一端係電性 &，二極舰之第二端係電_接至地 之第一 阻經第五電阻R5之後，係從第五電 之第麟送絲護單元114之味器132 15 20 號。ίίίϋ4/ι接收參考電壓、第一控制訊號與迴授訊 ，保護早兀114包括比較器132、第一電晶 以i可ΐ電阻i40。其中’比較器132係具有第一輸人 端。比較器132之第一輸入端係電性 ^至迴授單元116之第五電阻R5之第二端，並接收迴】訊 :比較器132之第二輸入端係接收一參考電壓。比較 =參考顏與迴授訊號作比較，並根據比較結 _： 訊唬至第一電晶體134。 权 如熟悉此技藝者可輕易知曉，參考電壓係可以例如是 ίΐί考電壓源所提供，而此參考電壓係等同於上述之ί 可變電阻140係電性雛於比較器132之第二輸入端縣 考電虔之來關。其巾’可魏阻_係為提供㈣者可^康 12 25 201011945 實際需要來調整參考電壓值。當然，可變電卩且 圍所影響之技電壓大小賴是在絲模纟4Q之可調整範 圍之内。 、仙8可承受之範 第一電晶體134具有射極端、基極端以及 晶體134之基極端係電性輕接至比較器132之一電 晶體134之射極端係電性耦接至地，第一電 Ί端’第一電 係電性耦接至開關單元112。 θ 34之集極端 第三電阻R3具有第-端與第二端。第三電 〇( 15 20 係ΪΪΪ一控制訊號’第三電阻R3之第二端係電性耦ΐ至Ϊ -電晶體134之集極端與第二電晶體136之基極 =耦接至第 其中’第一電晶體134聰據比較器132輪 是否被導通’並以此決定第一電晶體134 在本發明之較佳實關中，第—電㈣134可 晶體’但不以此為限。第一控制訊號可以例如 =控制單7G 118所傳來之控制訊號。請繼續參昭第1Β ί 元5係接收第一控制訊號。此襲單係包括第三 、DQ _、㈣阻R2、第二電晶體⑽以 極端T筮“曰。J二電晶體138係具有汲極端、閘極端與源 第二電s曰體138之汲極端係電性耦接至光源模組108， 匕，體138之源極端係電性減至交流電源1〇2 (透過整 流器104)。 番阳ti本實施例中，第一電阻R1具有第一端與第二端。第一 一番R 〇之第一端係電性耦接至第三電晶體138之閘極端，第 筮-i】D之第二端係電性麵接至第三電晶體138之源極端。 雪Λ係二具有第一端與第二端。第二電阻R2之第一端係 係電.陰至;-電;：S端第二_之第二端 13 25 201011945 5This feedback unit 116 includes a fifth resistor to accommodate C1 and diode D1. The fifth resistor R5 has a sixth resistor R6, and the electric V has a first end and a second end 201011945. The first of the fifth resistor R5 and the second end of the resistor R are electrically connected to the light source module (10) and the fifth first-input terminal. The sixth resistor R6 of the comparator 132 of the electrical wheel to the unit 114 has a first @@ terminal electrically coupled to the fifth electrical: the first end of the six resistor R6 is electrically coupled to ground. First, the second of the sixth resistor R6 is lightly connected to the = and - terminals of the fifth resistor Rf. The first end of the capacitor C1 is electrically connected to the first end of the electric diode D1, and the second end of the dipole is electrically connected to the first resistor of the ground through the fifth resistor R5. No. 132 15 No. 20 of the first lining wire feeding unit 114 of Wudian. The reference voltage, the first control signal and the back-receiving signal are received, and the protection device 114 includes a comparator 132, a first transistor, and an i-resistance resistor i40. Where 'the comparator 132 has a first input terminal. The first input of the comparator 132 is electrically coupled to the second end of the fifth resistor R5 of the feedback unit 116, and is received back to the second input of the comparator 132 to receive a reference voltage. Comparison = The reference color is compared with the feedback signal, and based on the comparison _: signal to the first transistor 134. As is well known to those skilled in the art, the reference voltage system can be provided, for example, by a voltage source, and the reference voltage is equivalent to the above. The variable resistor 140 is electrically connected to the second input of the comparator 132. The county is in charge of the test. Its towel can be used to provide (four) can be Kang 12 25 201011945 The actual need to adjust the reference voltage value. Of course, the variable voltage and the size of the technology affected by the enclosure are within the adjustable range of the wire mold 4Q. The first transistor 134 has an emitter pole, a base terminal, and a base of the crystal 134 is electrically connected to the emitter of the comparator 132. The emitter is electrically coupled to the ground. The first electrical system is electrically coupled to the switching unit 112. The extreme end of θ 34 The third resistor R3 has a first end and a second end. The third terminal (15 20 is a control signal, the second end of the third resistor R3 is electrically coupled to the collector terminal of the transistor 134 and the base of the second transistor 136 is coupled to the first 'The first transistor 134 is based on whether the comparator 132 is turned on' and thereby determines the first transistor 134. In the preferred embodiment of the present invention, the first (four) 134 is crystallizable 'but not limited thereto. The control signal can be, for example, the control signal transmitted by the control unit 7G 118. Please continue to refer to the first control unit. The unit 5 receives the first control signal. The attack system includes the third, DQ _, (4) resistance R2, and the second power. The crystal (10) is electrically coupled to the light source module 108, the source of the body 138, with an extreme T筮 "曰. J two transistor 138 series having a 汲 extreme, a gate terminal and a source second s body 138. The extreme system is reduced to the AC power supply 1〇2 (through the rectifier 104). In this embodiment, the first resistor R1 has a first end and a second end. The first end of the first R 〇 is electrically The second end of the second electrode is connected to the source terminal of the third transistor 138. Λ two lines having a first end and a second end the first end of the second resistor R2 electrically-based system to a female; - electricity;: _ a second end of the second end of the S 13252010119455
1515
20 第二電晶體136係具有射極端、基極端 電晶體136之射極端係電_接至地。其中，第：U t =為=第:電晶體134之集極端的電位決定是否被導通，亦 t备第-電晶體134未被導通時，第一電晶體134之集 的電位則由第-控制訊號所決定；反之，當第一電晶體134 ^ 導通時’第-電晶體134之集極端的電位則為邏輯低準位。 其次’第三電晶體138則根據第二電晶體136之集極端 電位決定是否被導通。 在本發明之較佳實施例中，第二電晶體136可以例如 是雙極性電晶體，而第三電晶體可以例如是P型金屬氧化 物半導體，但均不以此為限。 凊參照第2圖，其係繪示依照本發明另一較佳實施例的 種照明系統之電路方塊圖。第2圖與第ία圖不同之處 在於第2圖之迴授單元係電性辆接至控制單元118與光源 模組108。此照明系統200係包括發光二極體驅動裝置 以及光源模組108。 在本發明之較佳實施例中，光源模組108例如是發光 二極體陣列或是單一的發光二極體，其數量自當不以此為 限0 此發光二極體驅動裝置206包括整流器1〇4、開關單元 112、保護單元114、迴授單元116、控制單元118以及時序單 元120。在本實施例中，迴授單元116係電性耦接至光源模組 108與控制單元us ’以檢測及根據光源模組1〇8之一負載狀 態產生一迴授訊號，並輸出迴授訊號。其中，此迴授訊號係例 如是流經光源模組108之電流值。 其中’整流器104係電性耦接至交流電源102，並接 收一交流電壓，用以在整流過後輸出交流電壓。而如熟悉 25 201011945 羲 ο 15 ❹ 20 此技藝者可輕易知曉，整流器104可以例如是不需配置、 被包含在照明系統200之内或之外，其自當視設計時之兩 求而定。 、而 時序單元120係電性耦接至交流電源1〇2 (透過整流器 104)，並根據一預設週期擷取整流器1〇4所輸出之交流電 其次’時序單元120將對所摘取到之交流電壓作一同步運算， 並產生及輸出一時序同步訊號。其中，時序同步訊號係欲使光 源模組108工作週期與交流電壓之週期能匹配。 控制單元118係電性耦接至時序單元12〇盥迴授 116。控制單元118係接收迴授單元116所傳來之^授訊號， 並接收及輸出迴授訊號。其中，控制單元i丨8係以此迴授訊號 f 一預設亮度值相t匕’並得到第一比較、结果。如熟悉該項技藝 者可以輕易知曉，預設亮度值可以例如是儲存於控制單元118 晶片内之記憶體或是與控制單元118晶片才目連接之記憶體。 另外’控制單元118還接收時序單元12〇所傳來之時序同 並料賴步概作以透過保護單元 114輸出一時序調整訊號。 號係電性麵接至控制單元118，並接收迴授訊 H 迴授輯與保護單元114内狀一參考電 姓果發ί，f 到第二比較結果。接著，根據第一及第二比較 單元112。其中，若迴授訊號所代 考二壓門3如是輸出邏輯低準位⑽ 電性二電源102與光源模組108間之 ~τ、ν α， ’右迴授訊號所代表之電流值小於參考電壓’ 可以例如是輸出邏輯高準位电/嫌J於爹可电魘 或伴拉Μ _(或私低準位）之訊號，以連接 …Μ 原2與光源模組⑽間之電性連結。 則 25 201011945 ❿10 開關單元Π2具有第一端、 112之第一端儀雷极叙垃5吞、治爸 之。，若迴授訊號比預設亮度值小， 訊號為調大交流電壓的脈寬。20 The second transistor 136 has an emitter pole, and the emitter pole of the base pole transistor 136 is electrically connected to ground. Wherein, the first: U t = is = the first potential of the collector of the transistor 134 determines whether it is turned on, and when the first transistor 134 is not turned on, the potential of the set of the first transistor 134 is The control signal is determined; conversely, when the first transistor 134 is turned on, the potential of the collector terminal of the first transistor 134 is at a logic low level. Next, the 'third transistor 138 determines whether or not to be turned on according to the set extreme potential of the second transistor 136. In a preferred embodiment of the present invention, the second transistor 136 may be, for example, a bipolar transistor, and the third transistor may be, for example, a P-type metal oxide semiconductor, but is not limited thereto. Referring to Figure 2, there is shown a block diagram of a lighting system in accordance with another preferred embodiment of the present invention. The difference between Fig. 2 and Fig. 3 is that the feedback unit of Fig. 2 is electrically connected to the control unit 118 and the light source module 108. The illumination system 200 includes a light emitting diode driving device and a light source module 108. In the preferred embodiment of the present invention, the light source module 108 is, for example, a light emitting diode array or a single light emitting diode, the number of which is not limited thereto. The light emitting diode driving device 206 includes a rectifier. 1〇4, switching unit 112, protection unit 114, feedback unit 116, control unit 118, and timing unit 120. In this embodiment, the feedback unit 116 is electrically coupled to the light source module 108 and the control unit us′ to detect and generate a feedback signal according to a load state of the light source module 1〇8, and output a feedback signal. . The feedback signal is, for example, a current value flowing through the light source module 108. The rectifier 104 is electrically coupled to the AC power source 102 and receives an AC voltage for outputting an AC voltage after rectification. As is well known, the skilled artisan will readily appreciate that the rectifier 104 can be, for example, unconfigured, contained within or outside of the illumination system 200, depending on the design. The timing unit 120 is electrically coupled to the AC power source 1〇2 (through the rectifier 104), and draws the AC power output by the rectifier 1〇4 according to a preset period. Secondly, the timing unit 120 will extract the extracted The AC voltage is synchronized and generates and outputs a timing synchronization signal. The timing synchronization signal is to match the duty cycle of the optical module 108 with the period of the AC voltage. The control unit 118 is electrically coupled to the timing unit 12 〇盥 feedback 116. The control unit 118 receives the received signal from the feedback unit 116 and receives and outputs the feedback signal. The control unit i 丨 8 is configured to feedback the signal f by a predetermined brightness value phase t 匕 ' and obtain a first comparison and result. As is well known to those skilled in the art, the preset brightness value can be, for example, a memory stored in the wafer of the control unit 118 or a memory connected to the control unit 118. In addition, the control unit 118 receives the timing sequenced by the timing unit 12 to output a timing adjustment signal through the protection unit 114. The electrical interface is connected to the control unit 118, and receives the feedback from the feedback H and the protection unit 114 to a second comparison result. Next, according to the first and second comparison units 112. Wherein, if the feedback signal is used to test the second pressure gate 3, if the output logic low level (10) between the electrical two power source 102 and the light source module 108 is ~τ, ν α, the current value represented by the right feedback signal is less than the reference. The voltage ' can be, for example, an output logic high level power/supply signal or a pull-up _ (or private low level) signal to connect... 电 the electrical connection between the original 2 and the light source module (10) . Then 25 201011945 ❿10 switch unit Π2 has a first end, 112 of the first end of the instrument Lei Lei Xu La 5 swallow, treatment dad. If the feedback signal is smaller than the preset brightness value, the signal is the pulse width of the AC voltage.
心的時序’以調整供給至光源模組⑽之交流電壓的脈寬。 則代表第一比較結果之切換 15The timing of the heart is adjusted to adjust the pulse width of the alternating voltage supplied to the light source module (10). Then represents the switch of the first comparison result 15
20 在本發明之較佳實施例中，當第一比較結果與第二比較結 中之一係表示需要調整開關單元112之開關週期時，保護 單元114所輸出之切換訊號即對開關單元112之開關週期作調 整。 整流器104係為對交流電源1〇2所傳來之交流電壓作定電 壓與濾波後輸出，以使光源模組1〇8可以在更為穩定之電壓下 工作。其中，整流器104可以例如是橋式整流器，但不以此為 限。 請繼續參照第2圖，此照明系統之操作方法為整流器ι〇4 接收及對交流電源102所供給之交流電壓作濾波整流後輪 出。光源模組108則根據開關單元112是否已與交流電源1〇2 (透過整流器104)作電袪連結。若是，則交流電源102-整流 器104-開關單元112-光源模組108-整流器104-交流電源1〇2 將形成一迴路，故只要交流電壓足以驅動光源模組108時，光 源模組108將發光。 此時’當光源模組108被驅動後，迴授單元H6將可測得 光源模組108之迴授電流值，並將迴授電流值所相對應之迴授 201011945 訊號輸出至，控解元118與保護單元114 (透過 ϋ則以迪授1*1號舆預設亮度值相比^並得到 號與内建之 結接果，二比較結果触輸出-切換訊號至 Ϊ ’開關單元112則根據此切換訊號決定是 刀模組108至交流電源1〇2間之迴路。另外，時序單 同步運整流器1〇4所輸出之交流電壓’並於進行 開關’以調整供給至光源模、組108之交流電壓 15 Ο 20 f本發明之較佳實施例中，由於第2圖之詳細電路圖 /、第1B圖大致類似，故，在此不再贅述。 會a接著請參照第3A圖，其係繪示依照本發明再一較佳 包例的一種照明系統之電路方塊圖。第3A圖與第1A圖 同之處在於第3A圖沒有控制單元118與時序單元12〇。 照明系統300包括係包括發光二極體驅動裝置3〇6以及 攻^原模組108。 _在本發明之較佳實施例中，光源模組108例如是發光 限 —極體陣列或是單一的發光二極體，其數量自當不以此為 〇 此發光二極體驅動裝置306包括整流器1〇4、開關單元 2、保護單元114、迴授單元116。在本實施例中，迴授單元 δ.係電性耦接至光源模組1〇8與保護單元114，以檢測及根 光源模組108之一負載狀態產生一迴授訊號，並輸出迴授訊 ^。其中’此迴授訊號係例如是流經光源模組1〇8之電流值。 其中’整流器104係電性耦接至交流電源1〇2，並接 17 201011945 =以易=在交流電壓。而如熟悉 在照明系統30。之内或之外，其自當視設;;:需 以:訊號，並 说號所代表之電流值大於參考 :右物 0° 15 20 斷開交 工是輸出邏輯高準位以t準電參 以連接或保持父流電源⑽與光源模組⑽間之電性連結。 112 第一端、第二端與第三端。開關單元 開關m 交流電源1〇2 (透過整流器1〇4)， ϊ耦接至保護單元114，並接收及根據切換 訊號用以連接或斷開交流電源102與光源模組⑽之連結。 朦盥係為對交流電源102所傳來之交流電壓作定電 壓^慮波後輸出，以使光源模組1〇8可以在更為穩定之電麼下 工。其中，整流器1〇4可以例如是橋式整流器，但不以此為 限。 *月繼續參照第3A圖，此照明系統之操作方法為整流器1〇4 ，收及對奴電源102所供給之錢電齡濾波整流後輸 出。光源模組108則根據開關單元112是否已與交流電源1〇2 25 丨透過整流，)作電性連結。若是，則交流電源102-整流 器104-開關單元112-光源模組1〇8_整流器1〇4_交流電源1〇2 將形成一迴路，故只要交流電壓足以驅動光源模組1〇8時，光 源模組108將發光。 201011945 、此時，當光源模組ϊ〇8被驅動後，迴授單元116將可測得 光源模組108之迴授電流值，並將迴授電流值 單元114餐單元114則以此迴授 ，之參考_概較，並輸出—切換訊號至開關單元112。接 m職據此祕減財衫靖光源模組 108至交流電源102間之迴路。 -插圖’其鱗示依照本發明—較佳實施例的 :二係具有第一端與第二端。第七電阻R7工以 至整流模組⑽，第七電阻R7之第二端係電性麵接 容單也元116係包括第五電阻115、第六電阻R6、電 端。第五m。此第五電阻R5係具有第—端與第二 15 20 係電性祕至保護單元114之比較器132之 端係第^^二端。第六電阻R6之第-端係電_接至^ 之第二端’第六電阻R6之第二 耦接ίΪ】1電二端。電容C1之第-端係電性 地。二極體I二㈡第CiJ容之第二端係電性祕至 端，1^3·^第—端係電性輕接至第五電阻R5之第二 第一端係電性耦接至地。 随經第五電阻R5之後，係從第五電 支第一輸。<授訊號傳送至保護單元114之比較器132 25 201011945 0 ο 15 鲁 20 保護單元114係接收參考電壓與迴授訊號。保護單元114 包括比較器132。其中，比較器132係具有第一輸入端、第二 輸入端以及輸出端。比較器132之第一輸入端係電性柄接 授單7L II6之第五電阻R5之第二端，並接收迴授訊號。比較 器I32之第二輸入端係接故-參考電壓。比較器132則以 5與迴授訊號作比較，並根據啸結果輸出—比較訊號‘ =兀112的第二電晶體136之基極端。如熟悉此技藝 輕易知曉，參考電壓係可以例如是由 上 供，而此參考電壓係等同於上述之參考電堅原所& 請繼續參照第3Β圖’開關單元112係接收保 ^比=訊號。此開關單係包括第三電晶體138、第電阻 第一電阻R2以及第二電晶體136。第=電曰、 =組108 ’第三電晶鶴之源極端係電 電源102 (透過整流器1〇4)。 稠接至父流 第二電晶體136係具有射極端、基極 電晶體136之射極端係電性輕接至地 曰2極端。第二 至第三電晶體138之閉以級 否被導通。，第一電晶體136係為根據比較訊號的電^g 第!ΐ二電性耗接至第三“體：:¾端^ 係電性麵接至第二電晶端第二電阻敗之第二; 電以ΆΙΤ。138 _m塌_ <集極端的 20 25 201011945 請參照第5Α圖，其係繪示依照本發明又一較佳實施例 的一種照明系統之電路方塊圖。照明系統500係包括發光 二極體驅動裝置506以及光源模組ι〇8。此光源模組ι〇8 與前述之光源模組相同，故在此不再贅述。 5In a preferred embodiment of the present invention, when one of the first comparison result and the second comparison result indicates that the switching period of the switching unit 112 needs to be adjusted, the switching signal output by the protection unit 114 is the switching unit 112. The switching period is adjusted. The rectifier 104 is configured to apply a voltage and a filtered output to the AC voltage from the AC power source 1〇2, so that the light source module 1〇8 can operate at a more stable voltage. The rectifier 104 can be, for example, a bridge rectifier, but is not limited thereto. Referring to FIG. 2, the illumination system is operated by the rectifier ι 4 receiving and filtering and rectifying the AC voltage supplied from the AC power source 102. The light source module 108 is electrically connected to the AC power source 1〇2 (through the rectifier 104) according to whether the switch unit 112 has been connected. If so, the AC power source 102-rectifier 104-switch unit 112-light source module 108-rectifier 104-AC power source 1〇2 will form a loop, so that as long as the AC voltage is sufficient to drive the light source module 108, the light source module 108 will emit light. . At this time, when the light source module 108 is driven, the feedback unit H6 can measure the feedback current value of the light source module 108, and output the feedback feedback current value corresponding to the 201011945 signal to the control unit. 118 and the protection unit 114 (through the ϋ 以 授 1 1 * * * * * * * 1 1 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并 并According to the switching signal, the circuit between the knife module 108 and the AC power source 1〇2 is determined. In addition, the AC voltage outputted by the timing single synchronous rectifier 1〇4 is adjusted to be supplied to the light source module and the group 108. AC voltage 15 Ο 20 f In the preferred embodiment of the present invention, the detailed circuit diagram and FIG. 1B of FIG. 2 are substantially similar, and therefore will not be described herein. A will then refer to FIG. 3A. A circuit block diagram of an illumination system in accordance with yet another preferred embodiment of the present invention is shown. Figure 3A is identical to Figure 1A in that Figure 3A has no control unit 118 and timing unit 12A. The illumination system 300 includes Light-emitting diode driving device 3〇6 and tapping the original mode 108. In the preferred embodiment of the present invention, the light source module 108 is, for example, a light-emitting limit-pole array or a single light-emitting diode, and the number thereof is not used as the light-emitting diode driving device. 306 includes a rectifier 1〇4, a switch unit 2, a protection unit 114, and a feedback unit 116. In this embodiment, the feedback unit δ is electrically coupled to the light source module 1〇8 and the protection unit 114 to detect And a load state of one of the root light source modules 108 generates a feedback signal, and outputs the feedback signal. The 'receiving signal is, for example, the current value flowing through the light source module 1 。 8. The rectifier 104 is electrically Sexually coupled to the AC power supply 1〇2, and connected to 17 201011945 = easy = in the AC voltage. And if you are familiar with the lighting system 30 or outside, it is self-defeating;;: need to: signal, and The current value represented by the indicator is greater than the reference: Right object 0° 15 20 Disconnected is the output logic high level to connect or maintain the electrical connection between the parent current source (10) and the light source module (10). First end, second end and third end. Switch unit switch m AC power supply 1〇2 (through the whole The current collector 1〇4) is coupled to the protection unit 114, and receives and disconnects the AC power source 102 from the light source module (10) according to the switching signal. The system is connected to the AC power source 102. The AC voltage is set as a constant voltage, and is outputted so that the light source module 1〇8 can be operated under a more stable power. The rectifier 1〇4 can be, for example, a bridge rectifier, but is not limited thereto. *Monthly continue to refer to FIG. 3A. The operation method of the illumination system is a rectifier 1〇4, which is outputted by the battery age filter supplied by the slave power source 102. The light source module 108 is based on whether the switch unit 112 has communicated with the switch unit 112. The power supply is 1〇2 25 丨 through rectification, and is electrically connected. If yes, the AC power supply 102-rectifier 104-switch unit 112-light source module 1〇8_rectifier 1〇4_AC power supply 1〇2 will form a loop, so as long as the AC voltage is sufficient to drive the light source module 1〇8, The light source module 108 will emit light. 201011945, at this time, when the light source module ϊ〇8 is driven, the feedback unit 116 will measure the feedback current value of the light source module 108, and the feedback current value unit 114 the meal unit 114 will be fed back The reference_synthesis, and output-switching signal to the switching unit 112. According to this, the secret is to reduce the loop between the 108-to-AC power source module 108 and the AC power source 102. - Inset </ RTI> in accordance with the invention - a preferred embodiment: the second system has a first end and a second end. The seventh resistor R7 is configured to the rectifier module (10), and the second end of the seventh resistor R7 is electrically connected to the unit 116, and includes a fifth resistor 115, a sixth resistor R6, and an electric terminal. Fifth m. The fifth resistor R5 has a first end and a second end 15 20 electrically connected to the end of the comparator 132 of the protection unit 114. The first end of the sixth resistor R6 is connected to the second end of the second end. The second coupling of the sixth resistor R6 is a two-terminal one. The first end of the capacitor C1 is electrically connected. The second end of the dipole I II (2) CiJ capacitor is electrically connected to the end, and the second end of the first resistor is electrically coupled to the second end of the fifth resistor R5. Ground. After passing through the fifth resistor R5, the first output is from the fifth branch. <Comparison signal transmitted to the protection unit 114 132 25 201011945 0 ο 15 The protection unit 114 receives the reference voltage and the feedback signal. Protection unit 114 includes a comparator 132. The comparator 132 has a first input terminal, a second input terminal, and an output terminal. The first input of the comparator 132 is electrically connected to the second end of the fifth resistor R5 of the 7L II6 and receives the feedback signal. The second input of comparator I32 is coupled to the reference voltage. Comparator 132 compares 5 with the feedback signal and outputs a base signal of the second transistor 136 of the comparison signal '=兀112 according to the whistle result. As is well known in the art, the reference voltage system can be supplied, for example, from the above, and the reference voltage is equivalent to the above-mentioned reference electric source & Please continue to refer to the third drawing 'switching unit 112 receiving the protection ratio = signal . The switch includes a third transistor 138, a first resistance first resistor R2, and a second transistor 136. The first = electric 曰, = group 108 'the third electric crystal crane source is the extreme electric power source 102 (through the rectifier 1 〇 4). The fused to parent flow of the second transistor 136 has an emitter pole, and the emitter pole of the base transistor 136 is electrically connected to the pole 2 pole. The closing of the second to third transistors 138 is turned on. The first transistor 136 is based on the electrical signal of the comparison signal. The second transistor is electrically connected to the third body: the 3⁄4 terminal is electrically connected to the second transistor and the second resistor is defeated. ; 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 138 20 20 25 25 25 25 25 25 25 25 25 25 25 25 25 20 20 20 20 20 25 25 20 25 25 25 20 20 25 20 20 20 20 The light emitting diode driving device 506 and the light source module ι 8 are included. The light source module ι 8 is the same as the foregoing light source module, and therefore will not be described herein.
15 Φ 20 發光二極體驅動裝置506係係電性耦接至交流電源丨〇2與 光源模組108。發光一極體驅動裝置506係包括整流器1〇4、 第一迴授單元l〇6a、第二迴授單元i〇6b、開關單元112、保 護單元114。 μ 在本實施例中，整流器104係電性耦接至交流電源1〇2與 光源模組108，以將交流電壓供給至光源模組1〇8。 第一迴授單元116a係電性搞接至整流器，以檢測及 根據整流器104輸出之交流電壓產生一第一迴授訊號，並輸出 第-迴授訊號。而第二迴授單^ l16b係電性耗接至光賴組 108，以檢測及根據光源模組1〇8之一負載狀態產生一第二迴 授訊號’並輸出第二迴授訊號。 保護單元114係電性耦接至第一迴授單元丨他與第二迴 I元且接收第一迴授訊號與第二迴授訊號。第一迴 ^^恤係以第-迴授訊號與保護單元⑴内建之一第一 - i w相比第二迴授單元U6b係以第二迴授訊號與保護 訊^。内建之一第二參考電壓相比’並選擇性地輸出一切換 112 Γίη112係具有第一端、第二端與第三端。開關單元 開關單(透過整㈣1〇4) ’ 112 t第一端係電性耦接至光源模組108，開關單元 收及根據^祕至倾軍元114。關科112係接 108之遠α 號用以連接或斷開交流電源102與光源模組 <連結（透過整流器104)。 21 25 201011945 "月參照第5B圖’其係纷示依昭本發明 的-種照日㈣統之部分電；佳實施例 及第二參考電ϋ路圖。此贼^ 114係接收第-電壓第及第二迴授訊號與第-控制訊號。 夕相實施例中’由於第二迴授單元116b、開關單元112 同 ' 故==前述之迴授單元116及開關單元112相 電曰：元J14係包括第二比較器132、第三電阻肋、第- 钃( 15 ❿ 20 器132 端、第二輸入端以及輸出端。第二比較 s端係電性耦接至第二迴授單元_，並接 ΐϊ: η ϊ二比較11132之第二輸入端係接收第二參 壓之來源間技置有—考電 電壓與第二職?_谈巾&啸/二二參考 一*電阻R3係具有第—端與第二端。此第三電阻防之第 if制訊號’第讀且R3之第二端係電性耦 f i之集極端°其中’此第—控制訊號可以例 ^ Φ電壓或控佩號（如賴明系統有配 話）’但不以此為限。 彳干 第1：日日體134係具有射極端、基極端以及集極端。第一 電，體134之基極端係電性耗接至第二比較器132之輸二， ^接ίί二^較訊號。第—電晶體134之射極端係電性麵接至 β ’第一電晶體134係根據第二比較訊號之電位來決定 疋否導通。 端係具有第一輸入端、第二輸入端以及輸出 鈿第比較器152之第-輸入端係電性轉接至第一迴授單元 22 25 201011945 Γ收迴ί:號。第一比較器152之第二輸入端係 接收第-參考電壓。其中，在第一比較器152 第-參考電紅來關更配置有—可㈣阻 j第-比較器152之第二輸入端之第一參考電壓的值係^ 阻值而被調整。其中，第-比較器脱、係 ^第一參考電壓與第二迴授訊號作比較，以輸出—第—比較訊 帝曰!四電晶體154係具有射極端、基極端以及集極端。第四 ο 15 20 至地’第四電晶體154之:: ，，辆接至第一比較器152之輸出端，第四電晶體 係電性耦接至第三電阻⑽之第二端。其中，第— —參考電壓與第—珊訊餅峨，以輸出一第 第九Sid’，第第一，單元116a係包括第八電阻R8與 雷阳第電阻肋具有第一端與第二端，第八 138 * * 姓Π第係電性耦接至第-比較器152之第一於： 電性麵接至地。 第一端’第九電阻R9之第二端係 請繼續參照第5B圖，舲昭 的操作方法為當整流器:出部J電路圖 器152輸出之第一比較壓太大時’第-比較 可以使第三電阻R3二3，„晶體154 ’因此 當第二迴授單元丨丨仙福弟胃厂鳊的電位為低電位。同樣地， 時，第二比較器132 ^出:Π且108之迴授電壓過大 體134，因此可以使第Λ =二通第一電晶 ^ 之第一端的電位為低電位。 ’备第二電阻R3之第二端的電位為低電位時， 23 25 201011945 第二電晶體136不會被導通，故第三電晶體138將不會被 ，通。所以，整流器104輸出之交流電壓將不會被供給至 光源模組108。因此，如圖5B之設計，將可在整流器1〇4 輸出之交流電壓或光源模組108之迴授電壓過大時，即關 閉開關單元112，以保護照明系統。 在本發明之較佳 實施例中，第三電晶體可以例如是P型金屬氧化物半導 體’但不以此為限。 在本發明之較佳實施例中，照明系統100、200、300、 ❹】 15 ❿ 20 5〇〇可以例如是單純的照明系統或為顯示裝置之背 但均不以此為限。 綜合以上所述，本發明之驅動裝置與照明系統，其係 $在流經光源模組的電流值太大或是整流器輸出之交流電 | =時，透過_單元賴光賴纟續交流電源之間的 1避免因電流太大而使光源模組被燒毀。增加 匕保護单7L不但可以調整亮度值，還可保護統模組。 限定ίϊί發，以較佳實施例揭露如上，然其並非用以 純“月Α任何熟習此技藝者，在不脫離本發明之精神 ♦•目4虽可作些許之更動與潤飾，因此本發明之保護 科繼麟私者為準° 系統:二依照本發明-較佳實施例的-種照明 系統ΐ二 照本發明一較佳實施例的一種照明 系統=以依照本發明另一較佳實施例的-種照明 明系=以依照本發明再-較佳實施例的-種照 24 25 201011945 第3B圖是繪示依照本發明再一較佳實施例的一種照 明系統之部分電路圖。 第4圖係習知一種照明系統之電路方塊圖。 第5A圖是繪示依照本發明又一較佳實施例的一種照 5 明系統之電路方塊圖。 第5B圖是繪示依照本發明又一較佳實施例的一種照 明系統之部分電路圖。 【主要元件符號說明】 100、200、300、400 :照明系統 102、402 :交流電源 ® 1G4、4G4 :整流器 106、206、306、406 :發光二極體驅動裝置 108、408 :光源模組 112、412 :開關單元 15 114、414 :保護單元 116、416 :迴授單元 118、418 :控制單元 120、420 :時序單元 132 :比較器 〇〇 134:第一電晶體 136 :第二電晶體 138 :第三電晶體 140 :可變電阻 ' 422 :亮度控制裝置 25 C1 :電容 D1 :二極體 R卜 R2、R3、R4、R5、R6、R7 :電阻 25The Φ 20 LED driver 506 is electrically coupled to the AC power source 丨〇2 and the light source module 108. The light-emitting unit driving device 506 includes a rectifier 1〇4, a first feedback unit 106a, a second feedback unit i〇6b, a switch unit 112, and a protection unit 114. In this embodiment, the rectifier 104 is electrically coupled to the AC power source 1〇2 and the light source module 108 to supply an AC voltage to the light source module 1〇8. The first feedback unit 116a is electrically connected to the rectifier to detect and generate a first feedback signal according to the AC voltage output by the rectifier 104, and output a first feedback signal. The second feedback module l16b is electrically connected to the optical group 108 to detect and generate a second feedback signal according to a load state of the light source module 1〇8 and output a second feedback signal. The protection unit 114 is electrically coupled to the first feedback unit and the second feedback unit and receives the first feedback signal and the second feedback signal. The first feedback unit is combined with the first-i w of the protection unit (1), and the second feedback unit U6b is provided with the second feedback signal and the protection signal. One of the second reference voltages is built in and selectively outputs a switch 112 Γ η 112 having a first end, a second end and a third end. The switch unit switch (through the whole (four) 1〇4) ’ 112 t first end is electrically coupled to the light source module 108, and the switch unit is connected to the armor unit 114. The Guanke 112 is connected to the remote alpha power source 102 for connecting or disconnecting the AC power source 102 to the light source module < coupling (through the rectifier 104). 21 25 201011945 "Monthly refer to Figure 5B', which is a part of the electricity of the invention according to the invention, the best example and the second reference circuit diagram. The thief ^ 114 receives the first voltage and the second feedback signal and the first control signal. In the embodiment, the second feedback unit 116b and the switch unit 112 are the same as the feedback unit 116 and the switch unit 112. The element J14 includes the second comparator 132 and the third resistance rib. , the first - 钃 (15 ❿ 20 132 end, the second input and the output. The second comparison s is electrically coupled to the second feedback unit _, and then: η ϊ second comparison 11132 second The input terminal receives the second reference voltage between the source and the technology. The test voltage and the second job? _ towel & whistle / 22 reference 1 * resistor R3 has a first end and a second end. This third resistor The first if signal is 'read' and the second end of R3 is the set of the electrical coupling fi. The 'this first-control signal can be Φ voltage or control number (such as the Lai Ming system has a phone) However, it is not limited to this. 第干1: The 134 series of the Japanese body has an emitter extreme, a base extreme, and a collector extreme. The first electrical, the base of the body 134 is electrically exhausted to the second comparator 132. , ^ ί ί ί ^ ^ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The bit has a first input end, a second input end, and the first input end of the output comparator 152 is electrically transferred to the first feedback unit 22 25 201011945 ΓRetraction ί: The second input end of the first comparator 152 receives the first reference voltage, wherein the first comparator 152 is configured with a first-reference electrical red The value of the first reference voltage at the input end is adjusted according to the resistance value, wherein the first comparator is decoupled, and the first reference voltage is compared with the second feedback signal to output - the first comparison message! The fourth transistor 154 has an emitter terminal, a base terminal, and a collector terminal. The fourth ο 15 20 to the ground 'fourth transistor 154:: , is connected to the output end of the first comparator 152, and the fourth electro-crystalline system The first end of the third resistor (10) is electrically coupled to the second end of the third resistor (10). The first reference voltage and the first signal are output to a ninth Sid'. First, the unit 116a includes an eighth resistor R8. The first rib and the second end of the Leiyang first resistance rib have the first end and the second end, and the eighth 138** surname Π is electrically coupled to the first-comparison The first end of the device 152 is: the electrical surface is connected to the ground. The second end of the first end of the ninth resistor R9 is continued with reference to FIG. 5B. The operation method of the first step is the rectifier: the output of the output J circuit diagram 152 When the first comparison voltage is too large, the 'first comparison can make the third resistance R3 two 3, „crystal 154'. Therefore, when the second feedback unit 丨丨仙福弟 stomach factory 鳊, the potential is low. Similarly, when The second comparator 132 outputs: 回 and the feedback voltage of 108 is oversized 134, so that the potential of the first end of the second 二 first transistor can be made low. When the potential of the second terminal of the second resistor R3 is low, 23 25 201011945, the second transistor 136 is not turned on, so the third transistor 138 will not be turned on. Therefore, the AC voltage output from the rectifier 104 will not be supplied to the light source module 108. Therefore, as shown in Fig. 5B, the switching unit 112 can be turned off when the AC voltage output from the rectifier 1〇4 or the feedback voltage of the light source module 108 is excessively large to protect the illumination system. In a preferred embodiment of the invention, the third transistor may be, for example, a P-type metal oxide semiconductor 'but is not limited thereto. In the preferred embodiment of the present invention, the illumination system 100, 200, 300, 15 15 20 can be, for example, a simple illumination system or a back of the display device, but not limited thereto. In summary, the driving device and the illumination system of the present invention are between the current value of the current flowing through the light source module or the alternating current output of the rectifier | Avoid burning the light source module due to too much current. Adding 匕 Protection Sheet 7L not only adjusts the brightness value, but also protects the system module. The invention is disclosed in the preferred embodiment, but it is not intended to be purely "anyone who is familiar with the art, without departing from the spirit of the invention", although it can be modified and retouched, the present invention The protection system is based on the following: a system for illuminating a system according to a preferred embodiment of the invention - a lighting system according to a preferred embodiment of the invention = in accordance with another preferred embodiment of the present invention - illumination illumination = in accordance with a further embodiment of the invention - 24 24 201011945 Figure 3B is a partial circuit diagram of an illumination system in accordance with still another preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5A is a circuit block diagram of a system according to another preferred embodiment of the present invention. FIG. 5B is a block diagram showing another preferred embodiment of the present invention. Partial circuit diagram of an illumination system of an embodiment. [Description of main component symbols] 100, 200, 300, 400: illumination system 102, 402: AC power supply 1G4, 4G4: rectifiers 106, 206, 306, 406: light-emitting diode Drive device 108, 4 08: light source module 112, 412: switching unit 15 114, 414: protection unit 116, 416: feedback unit 118, 418: control unit 120, 420: timing unit 132: comparator 134: first transistor 136 : second transistor 138 : third transistor 140 : variable resistor ' 422 : brightness control device 25 C1 : capacitor D1 : diode R R R2 , R3 , R4 , R5 , R6 , R7 : resistor 25
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| TW97135124A TWI398963B (en) | 2008-09-12 | 2008-09-12 | Light emitting diode driving device and light system |
| US12/392,434 US8044603B2 (en) | 2007-06-11 | 2009-02-25 | Light emitting diode driving device and light system |
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| TW97135124A TWI398963B (en) | 2008-09-12 | 2008-09-12 | Light emitting diode driving device and light system |
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| TW200816608A (en) * | 2006-09-26 | 2008-04-01 | Beyond Innovation Tech Co Ltd | DC/DC converter |
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