1237803 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種反流器驅動電路，尤指一種藉由應用於變壓單元在 標準正弦波頻率驅動信號下作動之電路。 【先前技術】 目前市售桌上及筆記型電腦、PDA、Webpad所用的液晶顯示螢幕(LCD)， 都是利用-種驅動裝置輸出高電壓，透過陶兗變壓器用以點亮冷陰極燈管 (CCFL)，以下即針對習知技藝之驅動裝置茲分述如下： 凊參閱「第1一1圖」所示，傳動壓電反流器驅動電路係利用電源單 元14輸入電力訊號至脈波調變器1〇與功率開關13 (m〇S F E 丁）， 而脈波调變器1〇輸出共振頻率操控功率開關13的作動，功率開關13 係由一 f型半導體(P—M0SFET) i 3 !與Ν型半導體(N—M〇SFET)丄3 2所組 成，即疋推挽式放大器（push-pull amplifier)，當脈波調變器1 〇輸出之 正相頻率信號波形1 1推動到P型半導體i 3 1時，p型半導體i 3丄會於1237803 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a inverter drive circuit, especially a circuit that operates under a standard sine wave frequency drive signal by applying to a transformer unit. [Prior technology] At present, the liquid crystal display screens (LCD) used in commercially available desktops, notebook computers, PDAs, and Webpads all use a kind of driving device to output high voltage and use a ceramic transformer to light up the cold cathode lamp ( CCFL), the following is the driving device of the conventional technology is described below: 凊 Refer to "Figure 1-11", the drive circuit of the piezoelectric piezo inverter uses the power unit 14 to input the power signal to the pulse wave modulation 10 and the power switch 13 (m0SFE D), and the pulse wave modulator 10 outputs the resonance frequency to control the operation of the power switch 13, the power switch 13 is an f-type semiconductor (P-MOSFET) i 3! And It is composed of N-type semiconductor (N-MOSFET) 丄 3, which is a push-pull amplifier. When the normal-phase frequency signal waveform 11 output by the pulse wave modulator 10 is pushed to P-type When the semiconductor i 3 1, the p-type semiconductor i 3
正相頻耗舰形丨丨下緣處導H正相鮮信號波形丨2獅動到N 型半導體1 3 2，N型半導體1 3 2於正相頻率信號波形1 2上緣處導通， 由於傳統功率關1 3輸出之工作電壓波形係為方波啟舰號，故功率開 關1 3輸出之驅動信號必須連接一電感i 忽里略轉_後，形成準正 弦波電壓波形後才輸人至變壓單元丨6作動產生壓電效應並輸出電力至負 載17但疋’ 4參照第1 - 2圖所示，由於前述之正相j言號波形11、 1 2之間具有時間差，即為停止時間(Dead心別工工，停止時間1 1 1 之目的在避免p型半導體丨3丨與卩型半導體13 2_起導通時所產生的 過載短路(〇ver shQrt)會造成p型半導體i 3丨及N型半導體丨Μ燒毀 之情事發生，因此經電感丨5修正後之弦波電驗形並無法完全形成標準 正弦波波形，而傳統反流II驅動電路必須以脈波調變器i 〇、功率開關1 3、電感15才能完成電力訊號驅動作業，所須電子零件多而容易造成實 際產生功率減損。 、 1237803 【發明内容】 係簡化傳統脈波===上$缺失，避免缺失的存在，本發明 之驅動線路1接以—弦波“二頻率輸出及工作電驗形轉換 動線路，本發_由弦波㈣產° =—信號放大11域Μ單元之驅 號至《放大^接力訊號並輸出—弦波頻率訊 動輸出°電力訊單元接收該驅動訊號共振作 關（瞧）a) 聰（簡）、功率開 ，， 兀作動頻率之弦波鮮訊號，因料會有波形訊號轉 工=能知失’讓變壓早元在標準正弦波頻率驅動信號下作動可發揮最^圭 【實施方式】 有關本發明之詳細朗及技_容，職配合圖歧明如下·· 請參閱『第2圖所示』，係本發明反流器驅動電路示意圖，如圖所示： 本發明係接收電源單元20輸入之電力訊號观後輸出一高壓電力訊號驅動 負載24a作動，此處之電源單元2()係指交流電經整流之直流電，該輸入之 電力訊號201可為經過功率因數調整器修正之直流訊號（依現有技術多為 1 2 V〜4 8 V) ’或者為直接整流之脈衝直流訊號（依現有技術為1 5 5 V )，而該反流器驅動電路具有一弦波信號產生器21a，該弦波信號產生器 2ja係接收该電力訊號2〇1並輸出一弦波頻率訊號211，基於弦波信號產生 器 21a(functi〇n generat〇r)本身為—信號源(signal s〇urce)，其内部設 有波形電路，故弦波信號產生器21a不須另外增設脈波調變器而可直接輸 出一共振頻率波形訊號，且該弦波頻率信號係直接為一正弦波頻率信號， 此時’再於弦波頻率訊號211傳送至一信號放大器22a(Power Amplifier)， 號放大器22a係接收邊弦波頻率訊號211後增益放大輸出一驅動訊號 221，其增益放大訊號除獲得線性的電壓訊號增益外，也同步帶動電流訊號 放大，當變壓單元23a接收該驅動訊號221後，變壓單元23a將共振作動 輸出電力訊號201驅動負載24a作動，負載24a並輸出回授訊號241至弦 1237803 2就產生為21a’基於弦波頻率訊號211及驅動訊號221 6為正弦波波形 ’因此’本發明之變壓單元23a $會產生如像统功率開關之停止時間 =曰之作動間斷情事’且正弦波波形直接對應變壓單元咖之共振頻率而 ，料會有如傳統方波轉換為正弦波之神減損情事發生，因此， 支f單7L 23a在正常作動下，本發明將比傳統脈波調變器、功率開關及電 感。又相更能發揮其最佳工作效能，而電子零件數減少，更可有利於電子 線路佈局’更可據此減少整體電路板體積。（本發明所稱變壓單元伽係可 為繞線式變㈣或壓電式變壓器，各圖式則單以壓電式變㈣為實施例說 明，至於繞線式變壓器之驅動電路相同，將不另繪圖說明。） 請參閱『第3圖所示』，本發明應用於多負載24a、24b之電路示意圖， 如圖所示·在多負載24a、24b之電子產品上（例如多支冷陰極燈管之液晶 顯示屏），本發明同樣適用，如圖為例，本發明之弦波信號產生器2ia、2化、 信號放大器22a、22b及變壓單元23a、23b對應負載24a、24b數量而為多 組配置，其電壓及訊號驅動方式同於上述，並取決於信號放大器之放 ^功率及變壓單元23a、23b所須功率而定，如第4圖所示，本發明之弦波 虎產生态21a及信號放大器22a為單組配置，而輸出驅動訊號221將可 同步驅動兩路之變壓單元23a、23b及負載24a、24b。 請參閱『第5圖所示』，係本發明應用於推挽式變壓單元23a、23b之 電路示意圖’如圖所示：與第4圖之實施態樣不同點在於，基於負載施 所須功率較大（例如長燈管），因此，必須採用二個以上之變壓單元23a、 23b採推挽式（PUSH-PULL)輸出功率推動負載24a，而變壓單元23a、23b 前端連接之弦波信號產生器21a及信號放大器22a同樣適用於此電路架構。 綜上所述僅為本發明的較佳實施例而已，並非用來限定本發明之實施 範圍。即凡依本發明申請專利範圍之内容所為的等效變化與修飾，皆應為 本發明之技術範疇。 乂 1237803 【圖式簡單說明】 第1一1、1一2圖，係傳統反流器驅動電路示意圖 第2圖，係本發明反流器驅動電路示意圖 第3、4圖，係本發明應用於多負載之電路示意圖 第5圖，係本發明應用於推挽式變壓單元之電路示意圖 【主要元件符號說明】 10.............脈波調變器 11、12...........正相頻率ί言號波形 111...........·· ·停止時間 13 .............功率開關 131 .............Ρ型半導體 132 .............Ν型半導體 14 .............電源單元 15 .............電感 16 .............變壓單元 17 .............負載 20.............電源單元 201.............電力訊號 21a...........弦波信號產生器 211.............弦波頻率訊號 22a、22b...........信號放大器 221.............驅動訊號 23a、23b...........變壓單元 231.............電力訊號 24a、24b...........負載 241.............回授訊號Positive-phase frequency-consuming ship shape 丨 丨 H-phase fresh signal waveform at the lower edge 丨 2 Lion moves to N-type semiconductor 1 2 3, N-type semiconductor 1 3 2 is turned on at the upper edge of the normal-phase frequency signal waveform 12 because The working voltage waveform output by the traditional power switch 1 3 is the square wave starter. Therefore, the driving signal output by the power switch 13 must be connected to an inductor i after turning slightly _ to form a quasi-sine wave voltage waveform. The transformer unit 丨 6 operates to generate a piezoelectric effect and output power to the load 17. However, referring to Figures 1 and 2, as the normal phase j signal waveforms 11 and 12 have a time difference between them, it is a stop. Time (Dead work, stop time 1 1 1 The purpose is to avoid p-type semiconductors 丨 3 丨 and short-circuit overload (〇ver shQrt) generated when conducting conduction with 卩 -type semiconductor 13 2_ will cause p-type semiconductor i 3丨 and N-type semiconductors 丨 burn-out occurred, so the sine wave electric shape after the correction 丨 5 can not completely form a standard sine wave waveform, and the traditional back current II drive circuit must use a pulse wave modulator i 〇 、 Power switch 1 3 、 Inductor 15 can complete the electric signal driving operation. There are many electronic parts and it is easy to cause actual power loss. 1237803 [Content of the invention] To simplify the traditional pulse wave === missing on the $, to avoid the existence of the missing, the drive circuit 1 of the present invention is connected to-sine wave "two frequency output and The working electric shape-converting moving circuit is produced by a sine wave. ° = —Signal amplification of the 11-domain M unit ’s driver to “Amplify the ^ relay signal and output—Sine wave frequency agitation output.” The power signal unit receives the drive. Signal resonance is off (see) a) Satoshi (simplified), power is on, and the sine wave signal of the operating frequency is expected, because it is expected that there will be a waveform signal. Rework = can't know what's wrong, let the transformer early element at the standard sine wave frequency The operation can be performed under the driving signal. [Embodiment] The detailed description and technical details of the present invention are as follows. Please refer to [shown in Figure 2], which is the inverter drive circuit of the present invention. Schematic, as shown in the figure: The present invention receives a power signal input from the power supply unit 20 and outputs a high-voltage power signal to drive the load 24a. The power supply unit 2 () here refers to AC power rectified DC power. The input power No. 201 may be a DC signal modified by a power factor regulator (mostly 12 V to 4 8 V according to the prior art) or a directly rectified pulsed DC signal (1 5 5 V according to the prior art), and the inverse The current generator driving circuit has a sine wave signal generator 21a. The sine wave signal generator 2ja receives the power signal 201 and outputs a sine wave frequency signal 211. Based on the sine wave signal generator 21a (functión generat.) r) itself is a signal source (signal source), which has a waveform circuit inside, so the sine wave signal generator 21a can directly output a resonance frequency waveform signal without adding a pulse modulator, and the string The wave frequency signal is directly a sine wave frequency signal. At this time, the sine wave frequency signal 211 is transmitted to a signal amplifier 22a (Power Amplifier). The amplifier 22a receives the side sine wave frequency signal 211 and gains and outputs a drive. In addition to gaining a linear voltage signal gain, the gain amplification signal of the signal 221 also simultaneously drives the amplification of the current signal. When the voltage transformation unit 23a receives the driving signal 221, the voltage transformation unit 23a outputs resonance operation The force signal 201 drives the load 24a to actuate, and the load 24a outputs the feedback signal 241 to the string 12378803 2 to generate 21a 'based on the sine wave frequency signal 211 and the drive signal 2216. It is a sine wave waveform'. Therefore, the transformer unit 23a of the present invention $ Will produce such as the stop time of the power switch of the traditional system = said to act intermittently, and the sine wave waveform directly responds to the resonance frequency of the strain compression unit, and it is expected that the degenerative situation will occur, such as the conversion of a traditional square wave to a sine wave, Under normal operation, the branch f 7L 23a will be better than the traditional pulse wave modulator, power switch and inductor. In addition, it can better exert its best working efficiency, and the reduction of the number of electronic components can be more beneficial to the electronic circuit layout ', and the overall circuit board volume can be reduced accordingly. (The gamma system of the transformer unit in the present invention may be a winding transformer or a piezoelectric transformer, and each diagram is described by taking the piezoelectric transformer as an example. As for the driving circuit of the winding transformer, the same Please refer to "shown in Figure 3", the circuit diagram of the present invention applied to multiple loads 24a, 24b, as shown in the figure · on electronic products with multiple loads 24a, 24b (such as multiple cold cathodes) The liquid crystal display screen of the lamp tube), the present invention is also applicable. As shown in the figure, the sine wave signal generators 2ia, 2b, signal amplifiers 22a, 22b and the transformer units 23a, 23b of the present invention correspond to the number of loads 24a, 24b. For multiple sets of configurations, the voltage and signal driving methods are the same as above, and depend on the power of the signal amplifier and the power required by the transformer units 23a and 23b. As shown in Figure 4, the sine wave tiger of the present invention The generated state 21a and the signal amplifier 22a are configured in a single group, and the output driving signal 221 can synchronously drive the two transformer units 23a, 23b and the loads 24a, 24b. Please refer to "shown in Fig. 5", which is a schematic circuit diagram of the present invention applied to the push-pull transformer units 23a, 23b. 'As shown in the figure: The difference from the implementation of Fig. 4 lies in the fact that The power is large (such as a long tube), so two or more transformer units 23a and 23b must be used to push the load 24a with push-pull output power, and the strings connected to the front end of the transformer units 23a and 23b The wave signal generator 21a and the signal amplifier 22a are also suitable for this circuit architecture. In summary, the above are merely preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the scope of patent application of the present invention shall be the technical scope of the present invention.乂 1237803 [Brief description of the diagrams] Figures 1-11, 1-12 are schematic diagrams of the conventional inverter drive circuit. Figure 2 is a schematic diagram of the inverter drive circuit of the present invention. Figures 3 and 4 are the invention applied to. Multi-load circuit diagram Figure 5 is a circuit diagram of the present invention applied to a push-pull transformer unit [Description of the main component symbols] 10 ............. Pulse wave modulator 11, 12 ............. Normal phase frequency signal waveform 111 .............. · Stop time 13 ............. Power switch 131 ......... P-type semiconductor 132 ......... N-type semiconductor 14 ......... Power supply unit 15 ......... Inductance 16 ......... Transformer unit 17 ......... Load 20 ............. Power supply unit 201 ............. Power signal 21a .............. Sine wave signal generator 211. ............ Sine wave frequency signals 22a, 22b ........... Signal amplifier 221 ............. Drive signals 23a, 23b .............. Transformer unit 231 ............. Power signals 24a, 24b ........... Load 241 ... .......... feedback signal