1266277 五、發明說明（1) 【發明所屬之技術領域 種利用電流回授控制之流=是 本發明係有關一種螢光燈管 的管電流控制裝置。 【先前技術】 目前市售桌上型電腦及筆記型 的液晶顯示幕（LCD)所需之光源，，細、PDA、WebPad所用 光燈管（如冷陰極螢光燈管），讓=利用一以高壓驅動的螢 可清楚看出所顯示晝面。 又射至背光板，使用者就 尤其用於LCD TV或附加觸控薄 亮度補償視覺需求，而螢光燈管是顯不幕，需更高 愈高，亮度愈亮，另為加強亮度，當回堊驅動，當官電流 時最重要是負載間管電流是否均勻用夕支螢光燈官，此 組螢光燈管之增加，使驅動點亮的控'^特11誤差小，另多 板體積變大，導致製作上較為不易^ =元數也杧加，電路 螢光燈管來補足亮度及均勻度，因螢 ^加。如使用多支 成螢光燈管間管電流及亮度不均，成為產士誤差，常造 擾或需用更多螢光燈管改善亮度及均^ &選配上之困 力”且也不易製作及調整，以下即針將造成成本增 之管電流控制的方法，敘述如下··對—般使用於發光燈管 壓器14與二螢光 5及1 5’之輸出端1266277 V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Field of the Invention The present invention relates to a tube current control device for a fluorescent tube. [Prior Art] The light source required for the commercially available desktop computer and notebook liquid crystal display (LCD), the light tube used for thin, PDA, and WebPad (such as cold cathode fluorescent tube), let = use one The high-powered firefly can clearly see the displayed surface. Also shot to the backlight board, the user is especially used for LCD TV or additional touch thin brightness compensation visual needs, and the fluorescent tube is not obvious, the higher the higher the brightness, the brighter the brightness, and the other is to strengthen the brightness. Looking back at the drive, when the official current is the most important, whether the current between the load tube is evenly distributed with the fluorescent lamp, the increase of the fluorescent tube of this group makes the control of the driving light '^11 error small, and the other board The volume becomes larger, which makes it harder to make ^^. The number of elements is also increased. The circuit fluorescent tube is used to complement the brightness and uniformity. If the use of multiple fluorescent tubes between the tube current and uneven brightness, become a misconduct error, often cause interference or need to use more fluorescent tubes to improve the brightness and the compatibility of the ^ & Production and adjustment, the following is the method that will increase the cost of the tube current control, as described below. · For general use in the output of the LED tube 14 and the two fluorescent 5 and 15'
=括有·一電源供應器i Ο、一為頻脈波調變器丄丄、一功 率開關1 2、一轉換單元1 3、一壓電變 燈管1 5及1 5’ ；其中二支螢光燈管 第5頁 1266277 五、發明說明（2) 共同連接一電阻1 6 ，並採共接地型態，當輸入電壓時，功 率開關1 2經由一轉換單元1 3驅動壓電變壓器1 4作動經 由逆/正壓電效應產生一高輸出電壓，進而驅動螢光燈管工 5和1 5 ’點亮，此時位於電阻1 6端，由於壓電變壓器1 4會產生一正半週信號與一負半週信號同時驅動螢光燈管 5和1 5，動作，而螢光燈管1 5和1 5 ’輸出的正半週信號 與負半週信號也因共接地而相互抵消，故電阻1 6端並無電 壓降的產生，因此螢光燈管1 5和1 5’輸出端因無電壓 降’而無法回授一電壓信號至高頻脈波調變器1 1 ，所以無 法透過電壓回授迴路控制螢光燈管1 5和1 5，的管電流， 況且習知的螢光燈管1 5和1 5，常因不穩定的電極、氣 ，··等問題’對螢光燈管1 5和1 5，内的管電流造成不正 《的動作（_如功率損耗），但是前述之習知技藝僅以一回授迴 =f f至^頻脈波調變器1 1 ，仍然無法控制螢光燈管1 5 壓點亮，的產因為螢光燈管1 5和1 5，必須經由高電 效應…等，易i向能量的管電流，容易產生高頻雜訊或弧光 損耗或破壞螢=ί ΐ光燈管1 5和1 5，内部所造成的功率 【發明内容】…5和1 5,之情事。 爰是，本發明 缺失存在，本發 主要目的，在於解決上述之缺失，避免 管内之管電流均4在於提出一種以電流回授方式維持螢光燈 本發明之另12的螢光燈管之管電流控制裝置。 管的輸出電流，以Ϊ佳手段係將透過信號處理器感測螢光燈 别出電流補償信號至高頻脈波調變器進行= includes a power supply i Ο, a frequency pulse modulator 丄丄, a power switch 1 2, a conversion unit 1 3, a piezoelectric lamp 1 5 and 1 5 '; two of which Fluorescent Tubes Page 5 1266277 V. Description of the Invention (2) A resistor 16 is connected in common, and a common ground type is adopted. When the voltage is input, the power switch 12 drives the piezoelectric transformer through a conversion unit 13 Actuation produces a high output voltage via the inverse/positive piezoelectric effect, which in turn drives the fluorescent lamp plumber 5 and 15' to illuminate, at this time at the resistor 16 end, since the piezoelectric transformer 14 produces a positive half cycle signal. Simultaneously driving the fluorescent tubes 5 and 15 simultaneously with a negative half-cycle signal, and the positive half-cycle signal and the negative half-cycle signal outputted by the fluorescent tubes 15 and 15' are also canceled by mutual grounding, so There is no voltage drop at the end of the resistor. Therefore, the output of the fluorescent tube 15 and 15' cannot be returned to the high-frequency pulse modulator 1 1 because there is no voltage drop. The voltage feedback loop controls the tube current of the fluorescent tubes 1 5 and 15 , and the conventional fluorescent tubes 1 5 and 15 are often unstable. The problem of electrodes, gas, etc. 'causes the tube currents in the fluorescent tubes 1 5 and 15 to cause incorrect operation (such as power loss), but the aforementioned conventional techniques are only given back to ^ frequency pulse wave modulator 1 1 , still can not control the fluorescent tube 1 5 pressure lighting, the production of fluorescent tubes 1 5 and 15 must pass the high electric effect, etc. The tube current is prone to high frequency noise or arc loss or damage to the firefly = ί 灯 1 1 1 1 1 1 , , 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部 内部爰 , 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本Current control device. The output current of the tube will be transmitted through the signal processor to sense the fluorescent lamp and the current compensation signal to the high frequency pulse wave modulator.
第6頁 1266277 ------- — 五、發明說明（3) 電流重新分配。Page 6 1266277 ------- - V. Description of the invention (3) Current redistribution.
根據本發明所揭露之螢光燈管之 I 於-高麼驅動的榮光燈管，用 ：二：衣置，應用According to the fluorescent lamp of the present invention, the glory lamp of the I-high-powered lamp is used for: two: clothing, application
均句化，其包含有： 肖彳持^燈官内之管電流的I 振頻脈波調變器’提供電*分配信號，傳送-讀讀 功率開關，用以輸出一驅動信號； 一，換單I接收前述電壓分配信號並作電 二=變壓器’接收前述轉換後電壓並進行變壓動作· 地。 燈官，與前述壓電變壓器相連接，且輸出端接 ^ m之技術特徵在於將螢光燈管區分為正相螢光燈管丨 ” 光燈官，位於正相螢光燈管與反相螢光燈管之輸出 =轉：口；=號至高頻脈波調變器，當榮光燈管接 又轉彳、早兀傳來的正半週及負半週驅動信號之驅動，並由 = 過信號產生器感測螢光燈管的輸出電流，以 輸出一共振頻率控制螢光燈管之管電流變化。 士下有關本發明的較佳實施例與技術内容，茲配合圖式說明| 【實施方式】 一本發明所揭露之螢光燈管之管電流控制裝置，係應用於 一咼壓驅動的螢光燈管，本發明所揭露的管電流控制裝置 控制一螢，燈管内部管電流的正常動作（該螢光燈管係為 冷陰極燈官（CCFL ))，用以避免高壓驅動螢光燈管時在 第7頁 1266277 五、發明說明（4) 常現象對螢光燈管内部管電流造成不正常動作。 首先請參閱「第2圖」所示，係為本發明之管電流控制 電路圖；係應用於一高壓驅動的螢光燈管2 5、2 5 a ，用 以維持螢光燈管2 5、2 5 a内之管電流的均勻化，其包含 有： 一高頻脈波調變器2 1 ，用以接收電源供應器2 0之工 作電壓輸入，並提供電壓分配信號，經由脈衝寬度調變 (PWM)傳送一PWM諧振頻率信號； 一功率開關2 2 、2 2 a，由PWM諧振頻率信號的正、負 半週訊號控制，進而輸出一驅動信號； 一轉換單元2 3、2 3 a，係為一電感，接收功率開關 2 2、2 2 a所傳送的驅動信號，作電壓分配信號及電壓轉 換； 一壓電變壓器24、24a，接收前述轉換單元2 3、 2 3 a轉換後的電壓並進行變壓動作； 一螢光燈管2 5、2 5a，係為一冷陰極螢光燈管，與 前述壓電變壓器2 4、2 4a相連接，兩者輸出端各連接一 電阻2 6、2 6 a再分別接地； 請同時參閱「第3圖」所示，係為本發明之電流信號波 形圖；本發明之技術特徵在於係將螢光燈管2 5、2 5 a區 分為正相螢光燈管2 5與反相螢光燈管2 5a，其中正相螢 光燈管2 5由功率開關2 2傳來的正半週驅動信號2 4 0驅 動時，正相螢光燈管2 5會輸出一第一電流信號2 5 0 ，另 負相螢光燈管2 5 a則由功率開關2 2 a傳來的負半週驅動信All sentenced, including: Xiao Wei holding the tube current of the tube I current frequency pulse wave modulator 'providing electricity * distribution signal, transmission - reading power switch for outputting a driving signal; The change order I receives the voltage distribution signal and makes a power==transformer' receives the converted voltage and performs a voltage-varying operation. The lamp official is connected to the piezoelectric transformer described above, and the technical feature of the output terminal is that the fluorescent tube is divided into a normal phase fluorescent tube. The light lamp is located in the normal phase fluorescent tube and inverted. The output of the fluorescent tube = turn: mouth; = number to the high-frequency pulse wave modulator, when the glory light tube is connected and turned, the positive half-cycle and the negative half-cycle drive signal are transmitted by the early , = The signal generator senses the output current of the fluorescent tube to output a resonant frequency to control the tube current change of the fluorescent tube. The preferred embodiment and technical content of the present invention are described in conjunction with the schematic description | [Embodiment] A tube current control device for a fluorescent tube disclosed in the present invention is applied to a pressure-driven fluorescent tube. The tube current control device disclosed in the present invention controls a fluorescent tube and an inner tube of the tube. The normal operation of the current (the fluorescent tube is a cold cathode lamp (CCFL)), to avoid high voltage driving the fluorescent tube on page 7 1266277 V. Description of the invention (4) Frequently on the fluorescent tube The internal tube current causes abnormal operation. First, please refer to "Figure 2" Is a tube current control circuit diagram of the present invention; it is applied to a high-voltage driving fluorescent tube 2 5, 2 5 a for maintaining the uniformity of the tube current in the fluorescent tube 2 5, 25 a, The method includes: a high frequency pulse wave modulator 2 1 for receiving a working voltage input of the power supply 20 and providing a voltage distribution signal for transmitting a PWM resonant frequency signal via pulse width modulation (PWM); The power switch 2 2 , 2 2 a is controlled by the positive and negative half cycle signals of the PWM resonant frequency signal, and further outputs a driving signal; a converting unit 2 3, 2 3 a is an inductor and receives the power switch 2 2. 2 2 a transmitted driving signal for voltage distribution signal and voltage conversion; a piezoelectric transformer 24, 24a, receiving the converted voltage of the conversion unit 2 3, 2 3 a and performing a voltage transformation operation; a fluorescent tube 2 5, 2 5a is a cold cathode fluorescent tube connected to the piezoelectric transformers 24, 24a, and the two ends of the two are connected to a resistor 2 6 and 2 6 a respectively; "Fig. 3" is a waveform diagram of the current signal of the present invention; The technical feature of the invention is that the fluorescent tubes 2 5, 2 5 a are divided into a normal phase fluorescent tube 25 and a reverse fluorescent tube 2 5a, wherein the normal phase fluorescent tube 25 is composed of a power switch 2 2 When the positive half-cycle drive signal is driven by 2 4 0, the positive-phase fluorescent tube 2 5 outputs a first current signal 2 5 0 , and the other negative-phase fluorescent tube 2 5 a is powered by the power switch 2 2 a. Negative half-week drive letter
第8頁 !266277 五、發明說明（5) 7係為/差動整流電路或是一全波整流電路，可i ^ w 第〜電流信號2 5 0和第二電流信號2 5 1經全===述 成前述的電流補償信號2 7 0 (如「第3圖」之雷=机=生 唬2 7 0所示），其經由高頻脈波調變器2 ；[判齡机j =心 共振頻率用以均勻螢光燈管2 5 、2 5 a内部的乾，、’ a出 達避免不正常管電流於螢光燈管2 5 、2 5a内二電流丄而 功率損耗或破壞螢光燈管2 5、2 5 a之情事發1所造、的 綜上所述僅為本發明的實施例而已，並 明之實施範圍。即凡依本發明t請專利範圍之内 唬2 4 1驅動，反相螢光燈管2 5 a則會輸出第二電流信號 2 5 1 ，其中第一電流信號2 5 0處於正半週狀態時，另第 二電流信號2 5 1則處於負半週狀態（如「第3圖」之第 〜、二電流h號2 5 0、2 5 1所示），信號處理器2 7會 處理「第3圖」中正半週狀態之第一電流信號2 5 〇 ，進二 產生一電流補償信號2 7 0 a至高頻脈波調變器2 1 ，由高 頰脈波調變器2 1輸出一共振頻率控制螢光燈管2 5 a之管電流變化，反之第一電流信號2 5 〇處於負半週狀態 4，另第二電流信號2 5 1則處於正半週狀態（如「第3 圖」之第一、二電流信號2 5 〇、2 5 1所示），而f味考 理器2 7會處理「第3圖」中之正半週狀態之第二二= 2 5 1 ，進而產生另一電流補償信號2 7 0 b至高箱 變器2 1 ’由高頻脈波調變器2 1輸出一共振頻率控制<馨周 燈管2 5、2 5 a之管電流變化；前述之第一電流工“ 0與第二電流信號2 5 1相位差為1 8 0。，俨啼口占化 的Page 8! 266277 V. Invention Description (5) 7 is a / differential rectifier circuit or a full-wave rectifier circuit, i ^ w first ~ current signal 2 5 0 and second current signal 2 5 1 through all = == described as the current compensation signal 2 7 0 (as shown in "Fig. 3" = machine = 唬 2 7 0), which is passed through the high frequency pulse wave modulator 2; [judge machine j = The resonance frequency of the heart is used to evenly dry the inside of the fluorescent tube 2 5 , 2 5 a, and the ' a is used to avoid the abnormal current of the tube current in the fluorescent tube 2 5 , 2 5a and the power loss or damage to the firefly The above description of the light tube 2 5, 2 5 a is only an embodiment of the present invention, and the scope of implementation is clarified. That is, according to the invention, the range of 专利2 4 1 is driven, and the inverted fluorescent tube 2 5 a outputs a second current signal 2 5 1 , wherein the first current signal 2 5 0 is in a positive half cycle state. At the same time, the second current signal 2 5 1 is in a negative half cycle state (as shown in the "Fig. 3", the second current h number 2 5 0, 2 5 1), and the signal processor 27 will process " In Fig. 3, the first current signal of the positive half cycle state is 2 5 〇, and a current compensation signal 2 7 0 a is generated to the high frequency pulse wave modulator 2 1 , which is output by the high buccal pulse wave modulator 2 1 A resonant frequency controls the tube current change of the fluorescent tube 2 5 a, whereas the first current signal 2 5 〇 is in the negative half cycle state 4, and the second current signal 2 5 1 is in the positive half cycle state (such as "3rd The first and second current signals of the figure are shown as 2 5 〇 and 2 5 1 ), and the f-flavor controller 27 will process the second half of the positive half-cycle state in "Fig. 3" = 2 5 1 . Further generating another current compensation signal 2 7 0 b to the high box transformer 2 1 'the output of a resonance frequency control by the high frequency pulse wave modulator 2 1 < the tube current change of the Xinhuan tube 2 5, 2 5 a; The aforementioned A current I "0 and the second current signal 251 to the phase difference 0. 18, accounting mouth of Yan cry
第9頁 1266277 五、發明說明（6) 效變化與修飾，皆應為本發明之技術範轉。 1266277 圖式簡單說明 第1圖，為習知管電流控制電路。 第2圖，為本發明之管電流控制電路。 第3圖，為本發明之電流信號波形圖。 【圖式符號說明】 10 ........電源供應器 11 ........高頻脈波調變器 12 ........功率開關 13 ........轉換單元 14 ........壓電變壓器 15、15，........螢光燈管 16........電阻 2 0........電源供應器 2 1........高頻脈波調變器 2 2 、2 2 a.....功率開關 2 3、2 3 a.....轉換單元 24、 24a.....壓電變壓器 2 4 0 .......正半週驅動信號 2 4 1.......負半週驅動信號 25、 25a.....螢光燈管 2 5 0 .......第一電流信號 2 5 1.......第二電流信號 26、 26a........電阻 2 7........信號處理器 電流補償信號 270、27 0a、27 Ob.....Page 9 1266277 V. INSTRUCTIONS (6) Effect changes and modifications should be the technical paradigm of the present invention. 1266277 Brief description of the diagram Figure 1 shows a conventional tube current control circuit. Fig. 2 is a tube current control circuit of the present invention. Figure 3 is a waveform diagram of the current signal of the present invention. [Description of Symbols] 10 ........Power Supply 11 ........ High Frequency Pulse Modulator 12 ........ Power Switch 13 .... ....conversion unit 14 ........piezoelectric transformer 15,15,........fluorescent tube 16........resistance 2 0.... ....Power Supply 2 1........High Frequency Pulse Modulator 2 2, 2 2 a..... Power Switch 2 3, 2 3 a..... Conversion Unit 24, 24a..... Piezoelectric transformer 2 4 0 ....... positive half cycle drive signal 2 4 1....... negative half cycle drive signal 25, 25a..... Light tube 2 5 0 .......first current signal 2 5 1.......second current signal 26, 26a........resistance 2 7..... ...signal processor current compensation signal 270, 27 0a, 27 Ob.....
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