M348438 • ； 五、新型說明： 【新型所屬之技術領域】 . 本創作是有關於一種多燈管驅動器’且特別是一種採用LIPS架 ，構的多燈管驅動器，其中LIPS為LCD Integrated Power Supply之 簡稱。 【先前技術】 在大尺寸液晶顯示器的應用’如26 p寸以上的液晶電視，因製作 泰成本及電源轉換效率要求，在不影響電路動作特性情況下，已慢慢 轉變為LIPS架構。所謂的LIPS架構就是將傳統燈管驅動器架構中 的DC/DC轉換器省略’因此用來驅動燈管的DC/AC轉換器（或稱為變 流器）之輸入不再是由DC/DC轉換器提供的24V電壓，而是直接取自 功率因數修正(Power Factor Correct ion，簡稱PFC)電路輸出的4〇〇v 電壓。因此，LIPS架構不僅可以省略DC/DC轉換器而降低成本， 可以因減少一級能量轉換而提升電源轉換效率。 圖1為一種習知的採用LIPS架構的多燈管驅動器之電路圖其 使用兩級麵:壓器作為隔離、升壓 '驅動等功能。請參照圖1，多^二 驅動器10包括AC/DC轉換态（或稱為整流器）11、切換式變流哭12 第一級變壓器13、諧振電路14、第二級變壓器151〜15n、電流偵、、貝 電路17以及控制電路18，此驅動器1〇用以接收市電交流信號1 並驅動燈管組161〜16η中的燈管。其中，整流器丨丨—般包’ 整流器111以及濾波電容器Cd，該橋式整流器lu對市^交流=式 Vac進行全波整流後輸出，此輸出通過濾波電容器Cd降低其電^旒 波。但是為了使功率高於75W的大尺寸液晶顯示器符合特璉 電流諧波規範，如歐規EN61000-3-2等，因此整流器n還必噴 3 M348438 功率因數修正(PFC)電路112以降低諧波。另外，電流偵測電路Π 包括全波整流器171〜ι7η、分壓電阻器R1及取以及濾波電容器c。 在多燈管驅動器10中’先由具功率因數修正(PFC)的整流器11 將市電交流信號Vac(典型值為9〇〜264Vrms)轉換為具有良好輸入功 率因數的直流電壓信號Vdc(典型值為4〇〇v)，接著直流電壓信號Vdc 輸入至切換式變流器12。切換式變流器12例如是全橋式、半橋式或 推挽式變流器，可以將直流電壓信號Vdc轉換成交流方波電壓信號 .Vacl後輸入至第一級變壓器13及諧振電路14。諧振電路14包括譜 鲁振電感器Llk及諧振電容器Cp，諧振電感器Llk及諧振電容器Ci 串聯耗接並跨接於第-級變壓器的二次側，而譜振電容器Cp兩 知耗接到所有第二級變壓器151〜15η的-次側串聯柄接後的兩端， 然，這些第二級變壓器⑸〜15η的二次側再分別墟以驅動相翻 燈管組161〜16η。諧振電路14除諧振出燈管所需的工作電壓外，其 電容器Cp還可過渡電壓信號’使交流方波電壓賤咖的波形變 成近似弦波的交流弦波電壓信號Vac2。最後，由電流侧電路^ 侧所有燈管組161〜16η中流it燈管的電流峰值，並提供給控制電 路18 ^為依據以便輸出脈波寬度調變㈣)切換控制信號調整切= 式變流器12的脈波寬度，進而調整流過燈管的電流量。 、 在多燈管驅動器ίο中’一個第二級變壓器15i(其中丨可以 2J3、…、或n)所驅動的燈管組16i包括兩支燈管16il及二 這兩支燈官16il及16ι2的輪出端分触翻全波整流器 極體17U及17l2。例如，第二級變壓器' 151所驅動的的 包括兩支燈管1611及1612,這兩支燈管1611及1612的輸^八 耦接到全波整流器171的二極體1711及1712。對: 15i二次側輸出的交流信號的—個週期而言，在前半週、‘，壓 仙對流過燈管⑻丨㈣流進行半波銳，錢转期^ = 4 M348438 17i2對流過燈管1612的 燈管電流在全波整流器17机進仃半波整’抓，这兩個經過半波整流的 脈動直流電流_制卩^的輸㈣合併成—個脈魅流電流，此 —此脈動直流電流經過1611及1612的電流峰值。然後， •其準位適合㈣電路18= _、錢哺換成脈動直流電壓且 電壓的漣波。 再經過濾、波電谷益c降低其脈動直流 多燈管驅動器1〇兩者差另之多燈管驅動器20和圖1所示之 二半波整流器271的二極體 一支燈管，這支燈管26心=51卿_燈管組測僅包括 極體2711 β ?719 m 的輸出端耦接到半波整流器271的二 的-㈣第二級變㈣151的二次側輸㈣交流信號 電半週期時’二極體27il對流過燈管的 進灯核整流，在後半辦，第二級賴器15 二極體2712完成—迴路，這_期:= =的輸出端合併成一個半波脈動直流電流，此二 電〜的峰值包含流過燈管26il的電流峰值。 彳 机 ”這些習知的採用Lips架構的多燈管驅動器ι〇或2 此在燈管輪出端均使用二極體二取半‘ 或王波整流電流信號。例如，驅動器1〇的每—個燈管輸出需要一個 一極體來抓取半波整流信號，再由兩支燈—一 而 取得全波整流錢，祕動H 2〇的每— ^躺取樣而 來抓取半波整流信號。因此，大尺寸液晶顯:==二： 多，燈管輸出所需要的二極體數量越多，成本當然:燈 5 M348438 個二極體於製造時，由於晶圓上晶體的長成會隨著不同的因素干 擾、，而使得每個生產的二極體均有誤差值，少量的二極體使用上， 决差疋可以被控制的，但當大量使用時，總和誤差將會成倍數的上 、升；另外，使用過多的被動元件於燈管等高壓輸出場合，元件糞 • 性將會是個挑戰。 罪 【新型内容】 - 有鑑於此，摘錢目的就是在提出—㈣辟鶴器，其採 ·= UPS架構且可減少用於偵測燈管電流的元件（如二極體）之使用 哭，成上述目的及其它目的’本創作提出—種多燈管驅動 二SI乂驅▲多支燈官’其包括一切換式變流器、一第一級變壓器、 ς二:變壓器、多個諧振電路、—電流偵測電路以及一控帝;電 輪心電壓信舰將其轉換成交流電壓信號後 _带路#ϋ ⑽。所有第二級變壓器的—次側及電流 電編…其中電流_ 第二級變壓芎的一劣細二峰值母個雜電路耦接於-相應的 包括至=::=一相應的燈管組之間，所述相應的燈管組 之間，肋心二二”接於切赋變流器及電流偵、測電路 /化彳燈㈣電解值峨控制娜式變流器。 二級：器動器因採用f電流偵測電路串接在第 這是因為第二級龍器—次二官電流的元件之使用量。 器-次側的電流均相笼/為串如形式，故流過每個第二級變壓 總和之電流除以莖f對於每個第二級籠器二次侧而言，其 除以弟二級變璧器隨比就是一次側電流，所以可以侦 6 M348438 測第^級變壓ϋ-次織流即可推得第二級變㈣二次側流出去驅 動燈管的電流量。 ^讓本！彳作之上述和其他目的、特徵和優點能更嘯易懂，下 文特舉較佳實_，並配合所關式，作詳細說明如下。 【實施方式】 时圖3為依照本創作—實施例麟示之採用㈣架構的多燈管驅 動器之，路圖’其使用兩級變麗器作為隔離、升壓、驅動等功能， 其憎管例如是冷陰極螢光燈管(CCFL)，但並不僅限於此；例如， 燈㈣y以是金鹵燈（metai halide 或贼燈（sQdi_p〇r am^等。請參照圖3 ’多燈管驅動器30包括具PFC的整流器3卜 切換式變流器32、第-級變壓器33、第二級懸器341〜施、鎌 電路351 35η電流偵測電路以及控制電路犯，此驅動器刈用 以接收市電交流信號Vac，並驅動燈管組361〜施中的燈管。燈管 組361(其中1可以為卜2、3、...、包括至少—支燈管，例如 ，計成如圖1的燈管組161所示包括兩支燈管1611及i6i2(即一個 弟-級變壓驅動兩支燈管），或設計成如圖2的燈管組制所示僅 包括-支燈官2611(即-個第二級變壓器驅動—支燈管），甚至於設 计成一個第二級變壓器驅動三支以上的燈管。 將市器3〇中’先由具功率因數修正㈣）的整流器31 將市電乂Vac(典型值為9〇〜264Vrms)轉換為具有良好輸入功 率因數的直流電壓信號Vdc(典型值為棚v)，其 (P=的整流H 31可如圖丨所示包括—橋式整流器、 及-濾波電容器。接著，直流電壓信號Mc輸入至切換式變 u 32。切換式變流ϋ 32例如是全橋式、半橋式或推 产哭， 但並不僅限於此，其可以將直流電壓信號恤轉換成交流^波電壓 7 M348438 信號Vacl後輸入至第一級變壓器33的一次侧。所有第二級變壓器 341〜34η的一次侧及電流偵測電路37串聯耦接並跨接於第一級變 Μ器33的二次側，在本實施例中，電流偵測電路37位於第—級變 '壓器33及第二級變壓器34η之間，但並不僅限於此；例如，電流偵 - 測電路37可以位於第二級變壓器341及342之間。 每個諧振電路35i耦接於相應的第二級變壓器34i的二次側及 -相應的燈管組36i之間，而每個諧振電路35i可以設計成如圖i所 •示之谐振電路14 一樣，皆包括譜振電感器Lik及譜振電容器&，其 Φ中諧振電感器可以是外接式電感器或相應的第二級變壓器34土 的二次侧賴電感ϋ。諧振魏35i用⑽振出燈管所需的工作電 壓’且其電容器Cp還可過攄電壓信號，使分壓到第二級變壓哭祕 -次側的技讀電壓信號Vael’的波形魏近_波的交^ ，壓㈣後驅動燈官組36ι。最後’由電流偵測電路37偵測所有燈 g組361〜36η巾流過燈官的電流蜂值，並提供給控制電路3 ==脈Ϊ寬度調變峰刀換控制信號調整切換式變流器 32的脈波寬度，進蝴整流過燈管的電流量。 阻'^本二例中套，电流伯測電路37包括全波整流器37卜分壓電 阻益1^、R2以及濾波電容器c。 所有第二級變壓器341〜34n的^；=37ϊ的感測電阻器R和 n r -xa-, 側為串聯形式，故流過感測電阻 盗R的電机與流過每個第二級賴器 二 者，對於每個第二級變壓哭、34· _ 0人側⑽均相等。再 壓器跖ϋ數比就是-次°側電流=側而言，其電流除以第二級變 -次側電流即可推得第二級變遷二可^貞測第二級變愿器34i 36i的燈管之電流量。 σ 41 —次側流出去驅動燈管組 燈管電流平均約為3mA〜8πιΑ， 支’每個第二級變壓器34i所 舉例來說，於點亮穩態條件下， 假設燈管電流為5mA，燈管數共有32 8 M348438 » t 驅動的燈管組36i包括兩支燈管，且每個第二級變壓器撕的限數 比均為1 . p(其中p大於1)。那麼所有第二級變壓器341〜3如的一 次側總和之電流應為5mAx32/2=80mA，因此映射回第二級變壓器 〜34η的一次侧的電流應為80mAxp。當由第二級變壓器341〜一 次側映射回一次側的電流流經感測電阻器R，即會於感測電阻^1 兩端產生-電縣’其為8GmAxpx(感測電阻器R的電阻值），此電芦 .差先經過二極體D卜D2全波整流後就可崎其峰值來峨流過^ •的電流峰值，當然之前還是須經過分壓電阻龍、R2分壓而得至H 鲁當的準位，並經過舰電容H降低漣波。值躲意的是知^ 驅動器10的電流綱電路17於偵測時，須採用半波整流 取電騎值，因此f要兩支燈絲完成—麵__，但= 之驅動器30因為使用耦接到燈管的變壓器（即第二級變壓器）的 側取樣，因此不管是驅動幾支燈管都可以取得一個週期的&樣。夂 圖4為依照本創作另-實施例所緣示之採用ups架構产其 驅動器之電路@ ’其使用兩級變壓器作為隔離、升壓、驅^。 請同時參闕3及圖4，圖4所示之多燈管驅動器4()和圖= ^燈管驅動器30兩者差別僅在電流债測電路。在多燈管·動哭仙 中，電流偵測電路47的全波整流器471是採用變壓器τ中間抽頭 ^ 器。當然地，本創作之多燈管驅動器的電流偵測電路中 、、王波m碰了如圖3所示的全波整流器371及如圖 之外2可以是利用比流器間接地擷取絲到燈管的 交I态（即苐二級變壓器）的一次側電流。 綜上所述，本餅之技管驅動關採㈣驗_電路串接 ^弟一級㈣器的—次側而可減少用於偵測燈管電流的元件使用 i二ί7第二級變壓器—次側為串聯形式’故流過每個第二級 為--人側的電流均相等，但對於每個第二級變壓器二次側而 9 M348438 舌，其總和之電流除以第二級變壓純 級變壓器—次側電流即可推得流: 出去驅動燈管的電流量 所以 第二級變壓器二次側流 雖然本創作已以較佳實施例揭露如上 作，任何熟習此技藝者，在不脫離本創作之=並=用以限定本創 些許之更動與潤飾，因士^ /月神和範圍内’當可作 圍所界定者為準。'之呆4乾圍當視後附之申請專利範 【圖式簡單說明】 圖，ups架構的多燈管驅動器之電路 圃八便用兩級k壓為作為隔離、升壓、驅動等功能。 4皆為依照本創作實施例所綠示之採用ups架構的多 =動◎之電路圖’其使用兩級㈣ϋ作她離、升壓、驅動等 功月&。 π 【主要元件符號說明】 10、 20、30、40 :多燈管驅動器 11、 31:具功率因數修正(PFC)的整流器 111 ·橋式整流器 112 :功率因數修正(pFC)電路 Cd :濾波電容器 12、 32 .切換式變流器 13、 33 :第一級變壓器 14、 351〜35η :諧振電路 M348438M348438 • ; 5, new description: [New technology field]. This creation is about a multi-lamp driver' and especially a multi-lamp driver with LIPS frame, LIPS is LCD Integrated Power Supply Abbreviation. [Prior Art] In the application of large-size liquid crystal displays, such as LCD TVs with a size of 26 p or more, due to the requirements of manufacturing cost and power conversion efficiency, the LIPS architecture has been gradually changed without affecting the circuit operation characteristics. The so-called LIPS architecture is to omit the DC/DC converter in the traditional lamp driver architecture. Therefore, the input of the DC/AC converter (or converter) used to drive the lamp is no longer converted by DC/DC. The 24V voltage provided by the device is directly taken from the 4〇〇v voltage of the Power Factor Correction (PFC) circuit output. Therefore, the LIPS architecture not only omits the DC/DC converter but also reduces the cost, and can improve the power conversion efficiency by reducing the primary energy conversion. Figure 1 is a circuit diagram of a conventional multi-lamp driver using a LIPS architecture. It uses a two-stage surface: a voltage regulator for isolation, boosting, and the like. Referring to FIG. 1, the multi-driver 10 includes an AC/DC conversion state (or referred to as a rectifier) 11, a switching-type converter 12, a first-stage transformer 13, a resonant circuit 14, a second-stage transformer 151~15n, and current sensing. And a circuit 17 and a control circuit 18 for receiving the mains AC signal 1 and driving the lamps in the lamp groups 161 to 16n. Among them, the rectifier 丨丨-package' rectifier 111 and the filter capacitor Cd, the bridge rectifier lu is full-wave rectified and outputted by the city AC = type Vac, and the output is reduced by the filter capacitor Cd. However, in order to make the large-size liquid crystal display with power higher than 75W comply with the special current harmonic specification, such as the European standard EN61000-3-2, the rectifier n must also spray 3 M348438 power factor correction (PFC) circuit 112 to reduce the harmonics. . In addition, the current detecting circuit Π includes a full-wave rectifier 171 to ι7 η, a voltage dividing resistor R1, and a fetching capacitor c. In the multi-lamp driver 10, the mains AC signal Vac (typically 9〇~264Vrms) is first converted by a power factor correction (PFC) rectifier 11 into a DC voltage signal Vdc with a good input power factor (typical value) 4〇〇v), then the DC voltage signal Vdc is input to the switching converter 12. The switching converter 12 is, for example, a full-bridge, half-bridge or push-pull converter, and can convert the DC voltage signal Vdc into an AC square wave voltage signal. After being input to the first-stage transformer 13 and the resonant circuit 14 . The resonant circuit 14 includes a spectral lug inductor Llk and a resonant capacitor Cp. The resonant inductor Llk and the resonant capacitor Ci are connected in series and connected across the secondary side of the first-stage transformer, and the spectral capacitor Cp is fused to all. The two ends of the second-stage transformers 151 to 15n are connected to the ends of the second-stage transformers. However, the secondary sides of the second-stage transformers (5) to 15n are respectively driven to drive the phase-turning lamp groups 161 to 16n. In addition to the operating voltage required to resonate the lamp, the capacitor Cp can also transition the voltage signal 'to convert the waveform of the alternating square wave voltage into an alternating sine wave voltage signal Vac2 that approximates the sine wave. Finally, the current peak value of the lamp tube flows from all the lamp tube groups 161 16 16 n on the current side circuit side, and is supplied to the control circuit 18 for the output pulse width modulation (4). The switching control signal is adjusted to the cut mode converter. The pulse width of the device 12, in turn, adjusts the amount of current flowing through the tube. In the multi-lamp driver ίο 'a second-stage transformer 15i (where 丨 can be 2J3, ..., or n), the lamp tube group 16i includes two lamps 16il and two lamps 16il and 16i2 The wheel end taps the full wave rectifier pole bodies 17U and 1712. For example, the second stage transformer '151 is driven by two lamps 1611 and 1612, and the two lamps 1611 and 1612 are coupled to the diodes 1711 and 1712 of the full-wave rectifier 171. For: 15i secondary signal output of the secondary side, in the first half of the cycle, ', the pressure on the flow through the tube (8) 丨 (four) flow half-wave sharp, money transfer period ^ = 4 M348438 17i2 convection through the tube The lamp current of the 1612 is in the full-wave rectifier 17 machine, and the two-wave rectification is carried out. The two pulsating DC currents that have undergone half-wave rectification are combined into a pulse current, which is the pulse. The DC current passes through the current peaks of 1611 and 1612. Then, • its level is suitable for (four) circuit 18 = _, money is fed into the pulsating DC voltage and the voltage is chopped. After filtering, the wave is reduced, and the pulsating DC multi-lamp driver 1 is different from the other two-tube driver 20 and the diode of the two-wave rectifier 271 shown in FIG. Lamp tube 26 heart = 51 _ _ tube group test only includes the output of the pole body 2711 β 719 m m coupled to the second half of the half wave rectifier 271 - (four) second stage change (four) 151 secondary side (four) AC signal During the electrical half cycle, the diode 27il rectifies the incoming lamp core flowing through the lamp. In the latter half, the second stage device 15 is completed by the diode 2112. The output of the _ phase: = = is merged into one and a half. The wave pulsates the direct current, and the peak of the second voltage includes the current peak flowing through the lamp tube 26il. "The downtime" of these conventional multi-lamp drivers using the Lips architecture, ι〇 or 2, uses diodes to take half or 'Wave wave rectified current signals at the output end of the lamp wheel. For example, each of the drives 1〇 The output of the lamp requires a one-pole body to capture the half-wave rectified signal, and then two lamps - one to obtain full-wave rectification money, and each of the secret H 2 取样 is sampled to capture the half-wave rectified signal. Therefore, the large-size liquid crystal display: == two: more, the more the number of diodes required for the output of the lamp, the cost of course: the lamp 5 M348438 diodes are manufactured, because the growth of the crystal on the wafer will follow Different factors interfere with each other, so that each produced diode has an error value. A small number of diodes can be used, and the coefficient can be controlled. However, when used in large quantities, the total error will be multiplied. In addition, using too many passive components in high-voltage output such as lamps, component manure will be a challenge. Crime [new content] - In view of this, the purpose of the money is to propose - (4) It adopts ·= UPS architecture and can be used to reduce the detection light The use of tube current components (such as diodes) to cry, for the above purposes and other purposes 'this creation proposes - a multi-lamp drive two SI 乂 ▲ multi-lamp official' which includes a switching converter, a The first-level transformer, the second transformer: a transformer, a plurality of resonant circuits, a current detecting circuit, and a control unit; the electric wheel core voltage ship converts it into an AC voltage signal, and then leads to #ϋ (10). All second-stage transformers - the secondary side and the current electric series ... wherein the current _ the second stage of the transformer 一 a subtle two-peak parent circuit is coupled to - the corresponding includes to =:: = a corresponding lamp group, Between the corresponding lamp group, the rib core 22" is connected to the cut-off converter and the current detection and measurement circuit / the xenon lamp (4) electrolysis value 峨 control Na-type converter. Level 2: The actuator is connected in series by the f current detection circuit. This is because the second stage of the dragon-secondary-current component is used. The current-phase current cage is in the form of a string, so the current flowing through the sum of each second-stage transformer is divided by the stem f. For each secondary side of the second-stage cage, it is divided by the brother. The secondary converter is the primary current, so you can detect the current level of the second stage (4) secondary side flow to drive the lamp by detecting the 6 M348438. ^ Let this! The above and other objects, features and advantages of the present invention are more succinct and easy to understand. The following is a detailed description of the present invention. [Embodiment] FIG. 3 is a multi-lamp driver adopting the structure of (4) according to the present invention. The road map uses a two-stage converter as an isolation, boosting, driving, etc. For example, it is a cold cathode fluorescent lamp (CCFL), but it is not limited to this; for example, the lamp (4) y is a metal halide lamp (metai halide or thief lamp (sQdi_p〇r am^, etc. Please refer to Fig. 3 'multi-lamp driver) 30 includes a rectifier 3 with a PFC, a switching converter 32, a first-stage transformer 33, a second-stage suspension 341~, a 镰 circuit 351 35n current detecting circuit and a control circuit, the driver is used to receive the mains The signal Vac is exchanged, and the lamp tube group 361 is applied to the lamp tube. The lamp tube group 361 (where 1 may be a breeze 2, 3, ..., including at least a lamp tube, for example, as shown in FIG. 1 The lamp tube group 161 includes two lamp tubes 1611 and i6i2 (ie, one brother-stage transformer driving two lamps), or is designed to include only the lamp officer 2611 as shown in the lamp group system of FIG. 2 ( That is, a second-stage transformer drive-branch tube, even designed to drive a second-stage transformer for more than three The lamp 31. The mains 乂Vac (typically 9〇~264Vrms) is converted into a DC voltage signal Vdc with a good input power factor by a rectifier 31 in the middle of the market. The shed v), (the rectification H 31 of P= may include a bridge rectifier, and a filter capacitor as shown in Fig. 。. Then, the DC voltage signal Mc is input to the switching type u 32. The switching converter ϋ 32, for example It is a full-bridge, half-bridge or push-production crying, but it is not limited to this. It can convert the DC voltage semaphore into an AC voltage 7 M348438 signal Vacl and input it to the primary side of the first-stage transformer 33. The primary side of the secondary transformers 341 to 34n and the current detecting circuit 37 are coupled in series and connected across the secondary side of the first stage converter 33. In this embodiment, the current detecting circuit 37 is located at the first stage. Between the presser 33 and the second stage transformer 34n, but not limited thereto; for example, the current sense circuit 37 can be located between the second stage transformers 341 and 342. Each of the resonant circuits 35i is coupled to the corresponding Secondary side of secondary transformer 34i and corresponding lamp group Between 36i, each resonant circuit 35i can be designed as the resonant circuit 14 shown in Fig. i, including the spectral inductor Lik and the spectral capacitor & the Φ resonant inductor can be an external inductor The secondary side of the corresponding second stage transformer 34 is the inductance ϋ. The resonant Wei 35i uses (10) to vibrate the required operating voltage of the lamp 'and its capacitor Cp can also pass the voltage signal to make the voltage division to the second stage. Transforming and crying--the waveform of the sub-technical reading voltage signal Vael' is Wei near_wave crossing, pressing (four) and driving the lamp group 36. Finally, the current detecting circuit 37 detects all the lights g group 361~36η The towel flows through the lamp's current bee value and is supplied to the control circuit 3 == pulse width modulation peak knife change control signal adjusts the pulse width of the switching converter 32 to rectify the amount of current through the lamp. In the case of the two examples, the current beta circuit 37 includes a full-wave rectifier 37, which is divided into piezoelectric resistors 1^, R2 and a filter capacitor c. The sensing resistors R and nr -xa- of the second-stage transformers 341 to 34n are connected in series, so that the motor flowing through the sensing resistor R flows through each second-level circuit. Both of them are equal to each second-stage transformer, and the 34· _ 0 person side (10) are equal. The re-pressor turns ratio is - the secondary side current = side, the current divided by the second-order variable-secondary current can be used to derive the second-order transition two can detect the second-order changer 34i The amount of current in the 36i lamp. σ 41—the secondary side flow out to drive the lamp group lamp current is about 3mA~8πιΑ, and each of the second-stage transformers 34i is, for example, under the steady state of lighting, assuming that the lamp current is 5mA. The number of lamps is 32 8 M348438 » t The lamp group 36i is driven by two lamps, and the limit ratio of each second-stage transformer is 1. p (where p is greater than 1). Then, the current of the primary side sum of all the second-stage transformers 341 to 3 should be 5 mA x 32 / 2 = 80 mA, so the current mapped to the primary side of the second-stage transformer 〜 34 η should be 80 mA xp. When the current mapped from the second-stage transformer 341 to the primary side back to the primary side flows through the sensing resistor R, it will be generated at both ends of the sensing resistor ^1, which is 8GmAxpx (the resistance of the sensing resistor R) Value), this electric reed. The difference is first passed through the diode D D2 full-wave rectification, then the peak of the current can flow through the peak of ^ ^, of course, it must be through the voltage divider resistor, R2 partial pressure Go to the level of H Ludang and pass the ship capacitor H to reduce the chopping. The value of the hiding circuit is that the current circuit 17 of the driver 10 must use a half-wave rectification to take the electric riding value when detecting. Therefore, f needs two filaments to complete the surface __, but the driver 30 is coupled due to the use. The side of the transformer (ie, the second-stage transformer) of the lamp is sampled, so that one cycle of the lamp can be taken regardless of whether several lamps are driven. 4 is a circuit for producing a driver using the ups architecture in accordance with another embodiment of the present invention, which uses a two-stage transformer as an isolation, boost, and drive. Please refer to Fig. 3 and Fig. 4 at the same time. The difference between the multi-lamp driver 4 () and the diagram = ^ lamp driver 30 shown in Fig. 4 is only in the current debt measuring circuit. In the multi-lamp tube, the full-wave rectifier 471 of the current detecting circuit 47 is a transformer τ intermediate tap. Of course, in the current detecting circuit of the multi-lamp driver of the present invention, Wang Bom touches the full-wave rectifier 371 as shown in FIG. 3 and the outside of the figure 2 can use the current-conductor to indirectly draw the wire to The primary current of the I-state of the lamp (ie, the secondary transformer). In summary, the technical control of the cake drive (four) inspection _ circuit serial connection ^ the first (four) of the - secondary side can reduce the components used to detect the lamp current using i ί 7 second-stage transformer - times The side is in series - so the flow through each second stage is - the human side is equal, but for each secondary side of the second stage transformer and 9 M348438 tongue, the sum of the current divided by the second stage of the pressure Pure-stage transformer - the secondary current can be pushed to flow: the amount of current that drives out the lamp, so the second-stage transformer secondary side flow. Although this creation has been disclosed in the preferred embodiment, any skilled person is not Deviation from this creation = and = to limit the creation of a few changes and refinements, because the person / moon and the scope of the 'who can be defined as the enclosure. 'The four patents are attached to the patent application model. [Figure is a simple description] Figure, the circuit of the multi-lamp driver of the ups architecture. The two-stage k-voltage is used as the function of isolation, boost, and drive. 4 is a circuit diagram of the use of the ups architecture according to the green of the present embodiment. The circuit diagram of the mobile device is used for two phases (four), and the power, the boost, the driver, and the like are used. π [Description of main component symbols] 10, 20, 30, 40: Multi-lamp driver 11, 31: Rectifier 111 with power factor correction (PFC) · Bridge rectifier 112: Power factor correction (pFC) circuit Cd: Filter capacitor 12, 32. Switching converter 13, 33: first stage transformer 14, 351~35η: resonant circuit M348438
Llk :諧振電感器 Cp :諧振電容器 151〜15η、341〜34η :第二級變壓器 161 〜16η、261 〜26η、361 〜36η :燈管組 1611、1612、2611、3611、3612 :燈管 17、 27、37、47 :電流偵測電路 171〜17η、371、471 :全波整流器 271〜27η :半波整流器 1711、1712、271卜 2712、Dl、D2 :二極體Llk: resonant inductor Cp: resonant capacitors 151 to 15n, 341 to 34n: second-stage transformers 161 to 16n, 261 to 26n, 361 to 36n: tube groups 1611, 1612, 2611, 3611, 3612: lamp 17, 27, 37, 47: Current detecting circuits 171 to 17n, 371, 471: full-wave rectifiers 271 to 27n: half-wave rectifiers 1711, 1712, 271, 2722, Dl, D2: diode
Rl、R2 :分壓電阻器 C :濾波電容器 R :感測電阻器 Τ :變壓器 18、 38 :控制電路 Vac :市電交流信號 Vdc :直流電壓信號Rl, R2: voltage dividing resistor C: filter capacitor R: sensing resistor Τ: transformer 18, 38: control circuit Vac: mains AC signal Vdc: DC voltage signal
Vacl、Vacl’ ：交流方波電壓信號Vacl, Vacl': AC square wave voltage signal
Vac2 :交流弦波電壓信號Vac2: AC sine wave voltage signal