TWI242675B - Lamp driving system - Google Patents
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- TWI242675B TWI242675B TW93112211A TW93112211A TWI242675B TW I242675 B TWI242675 B TW I242675B TW 93112211 A TW93112211 A TW 93112211A TW 93112211 A TW93112211 A TW 93112211A TW I242675 B TWI242675 B TW I242675B
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- 239000003990 capacitor Substances 0.000 claims abstract description 53
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims description 20
- 230000006698 induction Effects 0.000 claims description 16
- 230000001939 inductive effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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Abstract
Description
1242675 五、發明說明G) 【發明所屬之技術領域】 本發明係關於一種信號迴授系統，特別是一種應用於 、 背光模組中之電源轉換器之信號迴授系統。 【先前技術】 液晶顯示器已經成為目前主流的顯示設備，不論電腦 設備用的顯示器或是家庭用的電視機，或是應用在其他家 電產品例如電冰箱、電鍋、冷氣機等等，其龐大的市場吸 引的電腦製造商以及家電廠商投入龐大的資源以推出相關 的產品以擴大市場佔有率。 液晶顯示器除了面板的關鍵技術外，其需要用到背光 $ 模組產生光線以點亮液晶，因此，背光模組的良窳與穩定 度，也是影響液晶顯示器的重要因素。此外為了符合大尺 寸顯示器的要求，為了讓亮度提高以及亮度均勻，多燈管 的使用成為一種趨勢。 先前技術所提出的背光燈管控制電路如『第1圖』所 示，係為單一燈管之控制電路，通常由一驅動器1 0、變壓 器T1、脈寬調變（PWM)控制器20以及第一電容C1與第二 電容C 2所組成，燈管3 0別和變壓器ΤΠ、第一電容C 1以及第 二電容C 2並聯。驅動器1 0係將輸入電源V i η處理後送給變 壓器ΤΠ，由變壓器Τ 1將電源升高到啟動燈管3 0所需要的高 電壓。 在PWM控制器20點亮燈管初期，經由第一電容C1和第二 電容C 2的回授信號推動驅動器1 0及變壓器Τ 1，而變壓器Τ 1 輸出高壓點亮燈管，此時第一電容C1大約有1 5 0 0 Vrms以上1242675 V. Description of the invention G) [Technical field to which the invention belongs] The present invention relates to a signal feedback system, especially a signal feedback system for a power converter used in a backlight module. [Previous technology] Liquid crystal displays have become the mainstream display devices at present, whether they are computer monitors or home televisions, or are used in other home appliances such as refrigerators, electric cookers, air conditioners, etc. Computer manufacturers and home appliance manufacturers attracted by the market have invested huge resources to launch related products to expand market share. In addition to the key technology of the LCD panel, the LCD display requires the backlight module to generate light to light up the liquid crystal. Therefore, the quality and stability of the backlight module are also important factors affecting the LCD display. In addition, in order to meet the requirements of large-size displays, and in order to improve brightness and uniform brightness, the use of multiple lamps has become a trend. The backlight tube control circuit proposed in the prior art is a control circuit for a single tube, as shown in "Figure 1", which is generally composed of a driver 10, a transformer T1, a pulse width modulation (PWM) controller 20, and A capacitor C1 and a second capacitor C 2 are formed, and the lamp tube 30 is connected in parallel with the transformer TΠ, the first capacitor C 1 and the second capacitor C 2. The driver 10 is to process the input power V i η and send it to the transformer TΠ, and the transformer T1 will raise the power to the high voltage required to start the lamp 30. In the initial stage of lighting the lamp by the PWM controller 20, the driver 10 and the transformer T1 are driven by the feedback signals of the first capacitor C1 and the second capacitor C2, and the transformer T1 outputs a high-voltage lamp, and at this time the first Capacitor C1 is approximately above 1 5 0 0 Vrms
1242675 五、發明說明（2) 的高壓，而第二電容C 2做為回授控制信號用，藉此方式達 成點燈的目的。 · 隨著燈管3 0的增多，採用以上技術的控制電路來控制 燈管，其電容的數量也要相對增加，於是造成一個亟待解 決之技術問題。當第一電容C1在穩態時大約有70 OVrms以 上的高壓，如果造成長時間使用第一電容Cl易有放電、冒 煙的危險，而造成控制電路的損壞。特別說明的是，燈管 對於液晶顯示的品質具有決定性因素，一旦控制電路損壞 造成燈管無法啟動，整台液晶顯示器等於作廢。因此，在 燈管數量增加的同時，如何減少電容等高壓元件的數量，$ 以增加系統的穩定度與安全性，遂成為亟待解決之技術問 題。 【發明内容】 鑒於以上的技術問題，本發明的主要目的在於提供一 種燈管驅動系統，藉以解決先前技術所存在的問題或缺 點。 因此，為達上述目的，本發明所揭露之燈管驅動系 統，係不採用電容而以設置於變壓器的感應繞組以感應燈 管電流的迴授訊號，包括有一驅動器，用以輸出一驅動訊 號；一變壓器，具有一初級侧與一次級侧，該初級侧係與 該驅動器相耦接，該次級侧之一端與該燈管相耦接；一感 應繞組，與該變壓器之該次級側之另一端相耦接，用以感 應相應於該燈管之一迴授訊號；以及一脈寬調變控制器， 分別與該燈管與該感應繞組相輕接，用以根據該迴授訊號1242675 V. Description of the invention (2), and the second capacitor C 2 is used as a feedback control signal, thereby achieving the purpose of lighting. · With the increase of 30 tubes, the control circuit of the above technology is used to control the tube, and the number of capacitors also needs to be relatively increased, thus causing a technical problem to be solved urgently. When the first capacitor C1 is at a high voltage of about 70 OVrms or more in a steady state, if the first capacitor Cl is used for a long time, there is a danger of discharge and smoke, which may cause damage to the control circuit. In particular, the lamp has a decisive factor for the quality of the liquid crystal display. Once the control circuit is damaged and the lamp cannot be started, the entire liquid crystal display is void. Therefore, as the number of lamps increases, how to reduce the number of high-voltage components such as capacitors to increase the stability and safety of the system has become an urgent technical issue. [Summary of the Invention] In view of the above technical problems, the main object of the present invention is to provide a lamp driving system to solve the problems or shortcomings of the prior art. Therefore, in order to achieve the above-mentioned object, the lamp driving system disclosed in the present invention does not use a capacitor and uses a feedback signal provided in an induction winding of a transformer to sense a lamp current, and includes a driver for outputting a driving signal; A transformer has a primary side and a primary side, the primary side is coupled to the driver, one end of the secondary side is coupled to the lamp tube, and an induction winding is connected to the secondary side of the transformer. The other end is coupled to sense a feedback signal corresponding to one of the lamp tubes; and a pulse width modulation controller is lightly connected to the lamp tube and the induction winding, respectively, so as to be used according to the feedback signal
1242675 五、發明說明（3) 推動該驅動器以輸出該驅動訊號。 為達上述目的，本發明所揭露之燈管驅動系統，係由 電路板上之上下兩層金屬層形成之電容與設置於變壓器的 感應繞組以感應燈管電流的迴授訊號，以驅動一根以上之 燈管，該燈管驅動系統係設置於一電路板上，該系統包括 有一驅動器，用以輸出一驅動訊號；一變壓器，具有一初 級側與一次級側，該初級侧係與該驅動器相耦接，該次級 側之一端與該燈管相耦接；一感應繞組，與該變壓器之該 次級側之另一端相耦接，用以感應相應於該燈管之一迴授 訊號；一替代電容，係由該電路板上之上下兩層金屬層形 $ 成，該金屬層其中之一與該變壓器之該次級側之一端相耦 接；一迴受電容，與該替代電容相耦接；以及一脈寬調變 控制器，分別與該燈管、該感應繞組以及該迴授電容相搞 接，用以根據該迴授訊號推動該驅動器以輸出該驅動訊 號。 為達上述目的，本發明所揭露之燈管驅動系統，係由 電路板上之上下兩層金屬層形成之電容以減少高壓元件的 使用，以驅動一根以上之燈管，該燈管驅動系統係設置於 一電路板上，該系統包括有：一種燈管驅動系統，用以驅 動一根以上之燈管，該燈管驅動系統係設置於一電路板 上，該系統包括有：一驅動器，用以輸出一驅動訊號；一 變壓器，具有一初級側與一次級側，該初級侧係與該驅動 器相耦接，該次級側之一端與該燈管相耦接；一替代電 容，係由該電路板上之上下兩層金屬層形成，該金屬層其1242675 V. Description of the invention (3) Push the driver to output the driving signal. To achieve the above object, the lamp driving system disclosed in the present invention is a capacitor formed by two metal layers above and below a circuit board and an induction winding provided on a transformer to sense a feedback signal of a lamp current to drive a lamp. For the above lamp tube, the lamp driving system is arranged on a circuit board. The system includes a driver for outputting a driving signal. A transformer has a primary side and a primary side. The primary side is connected to the driver. Phase coupling, one end of the secondary side is coupled to the lamp tube; an induction winding is coupled to the other end of the transformer side of the secondary side to sense a feedback signal corresponding to one of the lamp tubes ; A replacement capacitor is formed by two metal layers above and below the circuit board, one of the metal layers is coupled to one end of the secondary side of the transformer; a return capacitor and the replacement capacitor And a pulse width modulation controller connected to the lamp tube, the inductive winding, and the feedback capacitor, respectively, for driving the driver to output the driving signal according to the feedback signal. To achieve the above object, the lamp driving system disclosed in the present invention is a capacitor formed by two metal layers above and below a circuit board to reduce the use of high-voltage components to drive more than one lamp. The lamp driving system The system is provided on a circuit board. The system includes: a lamp driving system for driving more than one lamp. The lamp driving system is provided on a circuit board. The system includes: a driver, It is used to output a driving signal. A transformer has a primary side and a primary side. The primary side is coupled to the driver. One end of the secondary side is coupled to the lamp. An alternative capacitor is connected by Two metal layers are formed on the circuit board, and the metal layers are
第8頁 1242675 五、發明說明（4) 中之一與該變壓器之該次級側之一端相耦接；一迴受電 容，與該替代電容相耦接；以及一脈寬調變控制器，分別 -與該燈管、該感應繞組以及該迴授電容相耦接，用以根據 該迴授訊號推動該驅動器以輸出該驅動訊號。 本發明的詳細特徵及優點將在實施方式中詳細敘述， 其内容足以使任何熟習相關技藝者了解本發明之技術並據 以實施，且任何與本發明相關之優點及目的係可輕易地從 本說明書所揭露之内容、申請專利範圍及圖示中理解。 以上之關於本發明内容之說明及以下之實施方式之說 明係用以示範與解釋本發明之原理，並且提供本發明之專 $ 利申請範圍更進一步之解釋。 【實施方式】 有關本發明的特徵與實作，茲配合圖示作最佳實施例 詳細說明如下。 關於本發明所揭露之電源轉換器信號迴授系統之第一 實施例請參考『第2圖』，係以一燈管作為說明，係由驅 動器1 0、PWM控制器2 0、變壓器T卜以及一感應繞組4 0所 組成，變壓器T 1的初級侧係與驅動器1 0相耦接，用以接收 驅動器1 0所輸出之驅動訊號，變壓器T 1則將驅動訊號升壓 以驅動點亮燈管3 0。燈管3 0之高壓端係耦接至變壓器T 1次 〇 級侧其中之一端，低壓端耦接至PWM控制器2 0。變壓器T 1 次級側之另一端耦接至PWM控制器2 0。感應繞組4 0之一端 與變壓器T 1之另一端耦接，另一端耦接至接地端。 根據本發明之原理，在此實施例中，藉由變壓器T 1次Page 8 1242675 V. One of the description of the invention (4) is coupled to one end of the secondary side of the transformer; a return capacitor is coupled to the substitute capacitor; and a pulse width modulation controller, Respectively-coupled to the lamp tube, the induction winding and the feedback capacitor, for driving the driver to output the driving signal according to the feedback signal. The detailed features and advantages of the present invention will be described in detail in the embodiments. The content is sufficient for any person skilled in the art to understand and implement the technology of the present invention, and any advantages and objectives related to the present invention can be easily obtained from the present The contents disclosed in the description, the scope of patent application and the illustrations are understood. The above description of the content of the present invention and the description of the following embodiments are used to demonstrate and explain the principle of the present invention, and provide further explanation of the scope of the patent application of the present invention. [Embodiment] With regard to the features and implementation of the present invention, the preferred embodiment will be described in detail with reference to the drawings. Regarding the first embodiment of the power converter signal feedback system disclosed in the present invention, please refer to "Figure 2", which uses a lamp as an illustration, which is composed of a driver 10, a PWM controller 20, a transformer T, and An induction winding 40 is formed. The primary side of the transformer T 1 is coupled to the driver 10 to receive the driving signal output by the driver 10. The transformer T 1 boosts the driving signal to drive the lighting tube. 3 0. The high-voltage terminal of the lamp tube 30 is coupled to one of the transformer T 1 times, and the low-voltage terminal is coupled to the PWM controller 20. The other end of the secondary side of the transformer T 1 is coupled to the PWM controller 20. One end of the induction winding 40 is coupled to the other end of the transformer T 1, and the other end is coupled to the ground terminal. According to the principle of the present invention, in this embodiment, the transformer T is used once
第9頁 1242675 五、發明說明（5) 級側經線圈感應一迴授訊號接到PWM控制器2 0，而PWM控制 器2 0經由此一迴授訊號可做為推動驅動器1 0及變壓器T 1高 壓輸出信號。根據本發明之原理，在此實施例中，係直接 減少高壓元件，例如電容，並藉由感應繞組感應迴授訊 號，以減少高壓元件的使用。 關於本發明所揭露之電源轉換器信號迴授系統之第二 實施例請參考『第3圖』，係由驅動器1 0、PWM控制器2 0、 變壓器T卜以及一感應繞組4 0所組成，變壓器T 1的初級侧 係與驅動器1 0相耦接，用以接收驅動器1 0所輸出之驅動訊 號，變壓器T 1則將驅動訊號升壓以驅動點亮燈管3 0。燈管 φ 3 0之高壓端係耦接至變壓器T 1次級側其中之一端，例如圖 中之A端，低壓端耦接至PWM控制器2 0。變壓器T 1次級側之 另一端，例如圖中之B端，耦接至PWM控制器2 0。感應繞組 4 〇之一端與變壓器T 1之另一端（B端）耦接，另一端耦接 至接地端。 與第一實施例不同之處在於第二實施例仍然設置兩個 電容，分別為替代電容SC與迴授電容FC。替代電容SC係設 置於電路板（PCB)之上，亦即在電路板上設置上下兩層 金屬層，利用兩層金屬產生電容效應，以作為替代電容使 用，如此可減少高壓元件的使用。此金屬層，舉例來說， 可為銅箔。 如圖所示，替代電容SC之一側，例如圖中之C端，電 性耦接至電壓器T 1次級側其中之一端，替代電容SC之另一 侧，例如圖中之D端，電性耦接至迴授電容F C。迴授電容Page 9 1242675 V. Description of the invention (5) The level side receives a feedback signal from the PWM controller 20 through the coil, and the PWM controller 20 can use this feedback signal to drive the driver 10 and the transformer T. 1 high voltage output signal. According to the principle of the present invention, in this embodiment, the high-voltage components such as capacitors are directly reduced, and the feedback signal is induced by the induction winding to reduce the use of the high-voltage components. For the second embodiment of the power converter signal feedback system disclosed in the present invention, please refer to "Figure 3", which is composed of a driver 10, a PWM controller 20, a transformer Tb, and an induction winding 40. The primary side of the transformer T 1 is coupled to the driver 10 to receive the driving signal output by the driver 10, and the transformer T 1 boosts the driving signal to drive the lighting tube 30. The high-voltage terminal of the lamp φ 30 is coupled to one of the secondary terminals of the transformer T 1, such as the A terminal in the figure, and the low-voltage terminal is coupled to the PWM controller 20. The other end of the secondary side of the transformer T 1, such as the B end in the figure, is coupled to the PWM controller 20. One end of the induction winding 4 is coupled to the other end (B end) of the transformer T 1, and the other end is coupled to a ground terminal. The difference from the first embodiment is that two capacitors are still provided in the second embodiment, which are a replacement capacitor SC and a feedback capacitor FC. The replacement capacitor SC is placed on a circuit board (PCB), that is, two upper and lower metal layers are arranged on the circuit board, and the two layers of metal are used to generate a capacitive effect as a substitute capacitor, which can reduce the use of high-voltage components. This metal layer may be, for example, a copper foil. As shown in the figure, one side of the replacement capacitor SC, such as the C terminal in the figure, is electrically coupled to one of the secondary sides of the voltage transformer T 1, and the other side of the replacement capacitor SC, such as the D terminal in the figure, Electrically coupled to the feedback capacitor FC. Feedback capacitor
第10頁 1242675 五、發明說明（6) FC將有一產生一迴受信號迴授至PWM控制器20中。 藉由變壓器T1次級侧B端經感應線圈4 0感應一信號及 替代電容SC之D端感應一回授信號接到PWM控制器，而PWM 控制器經由此信號可做為推動驅動器2 0及變壓器T 1高壓輸 出信號，達成減少高壓元件的使用。 關於本發明所揭露之電源轉換器信號迴授系統之第二 實施例請參考『第4圖』，係由驅動器1 0、PWM控制器2 0、 變壓器T 1所組成，變壓器T 1的初級侧係與驅動器1 0相耦 接，用以接收驅動器1 0所輸出之驅動訊號，變壓器T 1則將 驅動訊號升壓以驅動點亮燈管3 0。 第三實施例與第二實施例相較，並未設置感應線圈 4 0，其餘之組成均與功能均與第二實施例相同。 第三實施例藉由設置於電路板上之替代電容S C之D端 感應一回授信號接到PWM控制器20，而PWM控制器20經由此 信號可做為推動驅動器1 0及變壓器T 1高壓輸出信號，達成 減少高壓元件的使用。 關於以上實施例所述之電路結構與先前技術之電氣特 性比較，請參考『第5A圖』至『第6B圖』，『第5A圖』係 為高壓點燈的電壓，由圖中可知此電壓為1568Vrms，『第 5 B圖』係為燈管正常工作時的電壓，由圖中可知此電壓為 71 6Vrms。『第56A圖』係為應用本發明所揭露之燈管驅動 系統之高壓點燈的電壓，由圖中可知此電壓為1 5 9 4 V r m s， 『第6 B圖』係為用本發明所揭露之燈管驅動系統之燈管正 常工作時的電壓，由圖中可知此電壓為738rms。比較兩圖Page 10 1242675 V. Description of the invention (6) The FC will generate a feedback signal to the PWM controller 20. The B terminal on the secondary side of the transformer T1 senses a signal through the induction coil 40 and the D terminal of the substitute capacitor SC senses a feedback signal to the PWM controller. The PWM controller can use this signal to drive the driver 2 0 and Transformer T 1 high-voltage output signal to reduce the use of high-voltage components. For the second embodiment of the power converter signal feedback system disclosed in the present invention, please refer to "Figure 4", which is composed of a driver 10, a PWM controller 20, and a transformer T1. The primary side of the transformer T1 It is coupled with the driver 10 to receive the driving signal output by the driver 10, and the transformer T1 boosts the driving signal to drive the lighting tube 30. Compared with the second embodiment, the third embodiment is not provided with an induction coil 40, and the remaining components and functions are the same as those of the second embodiment. In the third embodiment, a feedback signal is sensed by the D terminal of the replacement capacitor SC provided on the circuit board and is connected to the PWM controller 20, and the PWM controller 20 can drive the high voltage of the driver 10 and the transformer T 1 through this signal. Output signals to reduce the use of high-voltage components. Regarding the electrical characteristics of the circuit structure described in the above embodiment compared with the prior art, please refer to "Figure 5A" to "Figure 6B". "Figure 5A" is the voltage of the high-voltage lighting, which can be seen from the figure It is 1568Vrms. "Figure 5B" is the voltage when the lamp is working normally. It can be seen from the figure that this voltage is 71 6Vrms. [Figure 56A] is the voltage of the high-voltage lighting using the lamp tube driving system disclosed in the present invention. It can be seen from the figure that this voltage is 1 5 9 4 V rms. "Figure 6B" is used by the present invention. The voltage of the exposed lamp tube driving system during normal operation, it can be seen from the figure that this voltage is 738rms. Compare two pictures
第11頁 1242675 五、發明說明（7) 可以發現，應用本發明所揭露之燈管驅動系統，在減少高 壓元件的使用，並以設置於電路板上的替代電容替代，其 電氣特性與先珂技術相當。由此可證明應用本發明所揭露 之燈管驅動系統於背光模組中，其電氣特性不受影響。 以下說明替代電容SC的設計原則。 當背光模組中的燈管要被點亮正常工作，以 LGPHILIPSLCD面板（LM181E1-H2MN)在 〇°c 時需要 1550Vrms 的咼壓點燈’作為設計依據。採用變壓器τ 1繞組：丨_ 2二 50Τ’ 3-4=2700T， Vin=28.7V， Cl=l〇PF， C2=1500PF。 由圈數筆可得 V3-4 = 28· 7x (2700/5) = 1550V。 由分壓定理可得 VC2 = 1 5 5 0x [l〇/( i 5 0 0 0 + 1 0 )]二ι· 〇3V 故上述計算當點燈初期電容C 1需受1 5 5 0 V的高壓電， 再經由分壓信號做P關控制器的檢知信號推動驅動器和變 壓器。達到點亮燈管的目的，對於C丨長時間的使用會有壽 命的疑慮易造成放電、冒煙。 本發明所揭露之第一實施例、第二實施例以及第三實 施例之電容值之設計準則如下。 採用變壓器 T1繞組：1-2二50T， 3-4=2700T， 4-5=3T， Vin: 2 8 · 7，替代電容SC以電路板上下兩層金屬間之電容值完 成，F015000PF。採用FR4基板材質，板厚1.6mm，銅泊厚 度 〇·07mm， 當面積為：0·5χ 0.5 = 0.25(1111112)可得3?厂； 1· 〇x 1. 0 = 1. 00(mm2)可得 6PF; 1· 5χ 1· 5 = 2· 25(πιιώ2)可得 1 〇PF，Page 11 1242675 V. Description of the invention (7) It can be found that the application of the lamp driving system disclosed in the present invention reduces the use of high-voltage components and replaces it with a replacement capacitor provided on the circuit board. Its electrical characteristics and advantages The technology is comparable. Therefore, it can be proved that the electrical characteristics of the lamp tube driving system disclosed in the present invention are not affected in the backlight module. The design principles of the replacement capacitor SC are described below. When the light tube in the backlight module is to be lighted and work normally, the LGPHILIPSLCD panel (LM181E1-H2MN) needs 1550Vrms of pressure-pressing lighting at 0 ° C as the design basis. Transformer τ 1 winding is used: 丨 _ 2 22 50T ′ 3-4 = 2700T, Vin = 28.7V, Cl = 10PF, C2 = 1500PF. V3-4 = 28 · 7x (2700/5) = 1550V from the number of turns. According to the voltage division theorem, VC2 = 1 5 5 0x [l〇 / (i 5 0 0 0 + 1 0)] 2 m 〇 3 V, so the above calculation when the initial capacitance C 1 of the lighting is subject to 1 5 5 0 V The high voltage, and then the detection signal of the P-off controller is driven by the divided voltage signal to drive the driver and the transformer. To achieve the purpose of lighting the tube, there is a doubt about the life of C 丨 for a long time, which may cause discharge and smoke. The design criteria for the capacitance values of the first embodiment, the second embodiment, and the third embodiment disclosed in the present invention are as follows. The transformer T1 winding is used: 1-2 220T, 3-4 = 2700T, 4-5 = 3T, Vin: 2 8 · 7, the replacement capacitor SC is completed by the capacitance value between the two layers of metal on the circuit board, F015000PF. FR4 substrate material, plate thickness 1.6mm, copper poise thickness 〇07mm, when the area is: 0 · 5χ 0.5 = 0.25 (1111112) can get 3 factories; 1 · 〇x 1. 0 = 1. 00 (mm2) 6PF can be obtained; 1 · 5χ 1 · 5 = 2 · 25 (πιώ 2) can get 1 〇PF,
第12頁 1242675 五、發明說明（8) 2 . Ox 2 . 0 = 4 · 〇 〇 (mm2 )可得 1 5PF ; 3.0x 3.0 = 9.00(1111112)可得30??。 由於燈管點亮為1 5 5 0 V r m s，根據變壓器圈數得知： V3-4 = 28· 7x ( 2 7 0 0 / 2 0 )二 1 5 5 0V，Page 12 1242675 V. Description of the invention (8) 2. Ox 2. 0 = 4 · 〇 〇 (mm2) can get 15PF; 3.0x 3.0 = 9.00 (1111112) can get 30 ??. As the lamp lights up to 1550 V r m s, according to the number of transformer turns: V3-4 = 28 · 7x (2 7 0 0/2 0) two 1 5 5 0V,
V4-5=1550x (3/2700)=1. 72V 再根據電路板1 a y 〇 u t方法完成之替代電容，當面積= 2. 25(mm2)可得 10PF。V4-5 = 1550x (3/2700) = 1.72V and then substitute the capacitor according to the circuit board 1 a y 〇 t method, when the area = 2. 25 (mm2) can get 10PF.
由分壓得知 VC2 = 1 5 5 0x [1(^( 1 5 0 0 0 + 1 0 )] =1.03VVC2 = 1 5 5 0x [1 (^ (1 5 0 0 0 + 1 0)] = 1.03V
故由變壓器T 1圈數比的分壓和電路板1 a y 〇 U ^方法的達 成’都可做為PWM控制器的檢知信號，推動驅動器及變壓 器，減少高壓元件使用。 本發明所揭露的燈管驅動 電容’以減少高壓元件的使用 因為高壓元件而損毀之機率， 系統的穩定度。此外，本發明 電氣特性經實驗驗證，並未受 在減少高壓元件使用的情況下 動系統仍然具有相同的電氣特 雖然本發明以前述之較佳 用以限定本發明。在不脫離本 之更動與潤飾，均屬本發明之 所界定之保護範圍請參考所附 系統’在電路板上直接設置 ’使得電路板在使用上減少 提高背光模組以及電源供應 所揭露的燈管驅動系統，其 到任何的影響，也就是說， ’本發明所揭露之的燈管驅 性。 1施例揭露如上，然其並非 發明之精神和範圍内，所為 專利保護範圍。關於本發明 之申請專利範圍。Therefore, the voltage division ratio of the transformer T 1 turns and the realization of the circuit board 1 a y 〇 U ^ method can be used as the detection signal of the PWM controller, driving the driver and the transformer, reducing the use of high voltage components. The driving capacity of the lamp tube disclosed in the present invention reduces the use of high-voltage components and reduces the probability of damage due to the high-voltage components, and the stability of the system. In addition, the electrical characteristics of the present invention have been experimentally verified and have not been affected by the reduction of the use of high-voltage components. The dynamic system still has the same electrical characteristics. Without departing from the changes and retouching, which are all within the protection scope defined by the present invention, please refer to the attached system 'Directly set on the circuit board', so that the circuit board can be used in a reduced way to improve the backlight module and the lights exposed by the power supply. The tube driving system has any influence, that is, the lamp driving property disclosed by the present invention. 1 The example is disclosed as above, but it is not within the spirit and scope of the invention, and it is the scope of patent protection. Regarding the patentable scope of the present invention.
第13頁 1242675 圖式簡單說明 第1圖係為先前技術所揭露之燈管驅動系統； 第2圖係為本發明揭露之燈管驅動系統之第一實施例； 、 第3圖係為本發明揭露之燈管驅動系統之第一實施例； 第4圖係為本發明揭露之燈管驅動系統之第一實施例； 第5 A圖係為先前技術所揭露之燈管驅動系統之點燈電壓； 第5 B圖係為先前技術所揭露之燈管驅動系統之燈管正常工 作電壓； 第6 A圖係為本發明所揭露之燈管驅動系統之點燈電壓；及 第6 B圖係為本發明所揭露之燈管驅動系統之燈管正常工作 電壓。 Φ 【圖式符號說明】 10 驅動器 20 脈寬調變控制器 30 燈管 4 0 感應繞組 T1 變壓器 C1 第一電容 C2 第二電容 SC 替代電容 FC 迴授電容 〇Page 13 1242675 Brief description of the diagram. The first diagram is the lamp driving system disclosed in the prior art. The second diagram is the first embodiment of the lamp driving system disclosed in the present invention. The third diagram is the present invention. The first embodiment of the disclosed lamp driving system; FIG. 4 is the first embodiment of the lamp driving system disclosed in the present invention; and FIG. 5A is the lighting voltage of the lamp driving system disclosed in the prior art Figure 5B is the normal working voltage of the lamp driving system disclosed in the prior art; Figure 6A is the lighting voltage of the lamp driving system disclosed in the present invention; and Figure 6B is Normal working voltage of the lamp of the lamp driving system disclosed in the present invention. Φ [Illustration of Symbols] 10 Drivers 20 Pulse Width Modulation Controller 30 Lamp 4 4 Induction Winding T1 Transformer C1 First Capacitor C2 Second Capacitor SC Replacement Capacitor FC Feedback Capacitor 〇
第14頁Page 14
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| TW93112211A TWI242675B (en) | 2004-04-30 | 2004-04-30 | Lamp driving system |
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| TW93112211A TWI242675B (en) | 2004-04-30 | 2004-04-30 | Lamp driving system |
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| CN108738192A (en) * | 2017-04-19 | 2018-11-02 | 赤多尼科两合股份有限公司 | A kind of light adjusting circuit |
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| CN108738192A (en) * | 2017-04-19 | 2018-11-02 | 赤多尼科两合股份有限公司 | A kind of light adjusting circuit |
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