M261718 八、新型說明： 新型所屬之技術領域 本創作係關於一種背光模組， 模組。 特別是關於一種具有多燈管之背光 先前技術 目前，背光模組已經被廣泛 誠 乜使用在各種電子產品之顯示器上， 例如，液晶顯示器、液晶電視、 -在达、 機面板、以及PDA等。如第i圖所 不’係為習知背光模組1之方境 ..^ ㈤。電容器U係耦接至變壓器之二吹 側π之二次側電感，且燈管13 t 系耦接至電容器12。其中，電容哭 ，、變壓器11係構成一組諧振電 a 东# θ ，自諧振電路之振盪頻率達到諧振頻 率τ ’即可用以啟動相對應之燈管13 Ρ思著顯示器之尺寸的增加，db 曰 月光模組之諧振電路亦須配合燈管13 之數量而增加，相對地增加了電 一 电夺态12之使用量。如第2圖所示，係 顯示為具有多燈管之背光模組2之電路示意圖。其中，複數之變壓器 電各器12係焊接於印刷電路板(printed Circuit Board，PCB)10 上’且燈管13係透過印刷電路板l〇之介面埠（未顯示）耦接至相對應 之諧振電路。 在背光模組2中，電容12大部分係為積層陶瓷電容(MultilayerM261718 8. Description of the new type: The technical field of the new type This creation is about a backlight module, a module. In particular, a backlight with multiple lamps. Prior technology At present, backlight modules have been widely used in displays of various electronic products, such as liquid crystal displays, liquid crystal televisions, LCDs, panels, and PDAs. As shown in Fig. I ', this is the context of the conventional backlight module 1.... ^. The capacitor U is coupled to the secondary-side inductor π of the two blowing sides of the transformer, and the lamp tube 13 t is coupled to the capacitor 12. Among them, the capacitor cries, and the transformer 11 series constitutes a set of resonance power a east # θ, and the oscillation frequency of the self-resonant circuit reaches the resonance frequency τ ', which can be used to start the corresponding lamp tube 13 pp considering the increase in the size of the display, db The resonance circuit of the moonlight module must also be increased in accordance with the number of lamp tubes 13, which relatively increases the use of electricity-to-electricity state 12. As shown in Figure 2, it is a schematic circuit diagram of the backlight module 2 with multiple lamps. Among them, a plurality of transformer electrical devices 12 are soldered on a printed circuit board (PCB) 10, and the lamp tube 13 is coupled to the corresponding resonance through an interface port (not shown) of the printed circuit board 10. Circuit. In backlight module 2, the capacitor 12 is mostly a multilayer ceramic capacitor (Multilayer
Ceramic Capacitor，MLCC)，此 MLCC，例如，為 1808 size 3KV 之 MLCC等。不過，由於積層陶瓷電容之内部係由多層電介質所組成， 且材質較_般材質電容器為脆，因此，在組裝多燈管背光模組1的過 程中MLCC極易受到作業員不小心彎曲印刷電路板(PCB)而折損或損 M261718 傷。除此之外，當MLCC内部之多層電介質受到損傷時，雖背光模組 2仍能正常操作，不過，MLCC因損傷所導致之異常電流，將會連帶 影響變壓器11與燈管13之正常操作特性，而更進一步地縮短變壓器 11與燈管13或背光模組2之使用壽命。 再者，當背光模組2所包括之諧振電路越多時，則MLCC更易受 到印刷電路板(PCB)之彎曲而折損或損傷。 新型内容 有鑑於此，本創作係提出一種具有多燈管之背光模組，係使用PCB 銅箔電容來取代習知之積層陶瓷電容(MLCC)，以克服習知MLCC亦 受到印刷電路板(PCB)之彎曲而折損或損傷所造成的缺點。 因此，本創作係提出一種背光模組，至少包括變壓器，印刷電路 板、電容、以及燈管。變壓器具有一二次側。電容係設置於印刷電路 板(PCB)上，且電容係耦接至變壓器之二次側，而燈管係耦接電容。其 中，電容係由印刷電路板(PCB)上之第一金屬箔及第二金屬箔所構成。 另外，本創作亦提出一種燈管驅動電路，包括變壓器、印刷電路 板、以及電容。變壓器係具有一二次側，而電容係設置於印刷電路板 上，且電容係耦接至變壓器之二次側。其中，電容係由印刷電路板上 之第一金屬箔及第二金屬箔所構成。 實施方式 第3A圖係顯示為本創作實施例之具有多燈管之背光模組3之電 路示意圖。背光模組3至少包括印刷電路板(PCB)IO、變壓器11，、 電容30、以及燈管13。變壓器11具有二次侧。電容30係設置於印刷 M261718 電路板(PCB)IO上，且電容12係經由印刷電路板(PCB)IO之介面埠（未 顯示）耦接至變壓器之二次側，而燈管13係耦接電容30。 另外，變壓器11與電容30係構成一燈管驅動電路，當變壓器11 之漏感與電容30之振盪頻率達到諳振頻率時，則可用以啟動相對應之 燈管13 〇 另外，印刷電路板10之正面係設置或嵌入有一銅箔或金屬箔（陰 影部分），以作為電容30之第一極30a，且在其反面係另設置或嵌入有 另一銅箔或金屬箔，以作為電容30之第二極30b，因此，此電容30 即為典型之PCB銅箔電容。依據電容之計算公式，如下列式子：Ceramic Capacitor (MLCC). This MLCC is, for example, an MLCC of 1808 size 3KV. However, since the interior of the multilayer ceramic capacitor is composed of a multi-layer dielectric, and the material is more brittle than ordinary capacitors, the MLCC is extremely vulnerable to the operator accidentally bending the printed circuit during the assembly of the multi-lamp backlight module 1. Board (PCB) and break or damage M261718 injury. In addition, when the multilayer dielectric in the MLCC is damaged, although the backlight module 2 can still operate normally, the abnormal current caused by the damage in the MLCC will affect the normal operating characteristics of the transformer 11 and the lamp 13 , And further shorten the service life of the transformer 11 and the lamp tube 13 or the backlight module 2. Furthermore, when the resonant circuit included in the backlight module 2 is more, the MLCC is more likely to be damaged or damaged by bending of the printed circuit board (PCB). In view of this, this creation proposes a backlight module with multiple lamps, which uses PCB copper foil capacitors to replace the conventional multilayer ceramic capacitors (MLCCs) to overcome the conventional MLCCs that are also affected by printed circuit boards (PCBs). Distortion caused by bending or damage. Therefore, this creation proposes a backlight module, which at least includes a transformer, a printed circuit board, a capacitor, and a lamp. The transformer has a primary and a secondary side. The capacitor is disposed on a printed circuit board (PCB), and the capacitor is coupled to the secondary side of the transformer, and the lamp tube is coupled to the capacitor. The capacitor is composed of a first metal foil and a second metal foil on a printed circuit board (PCB). In addition, this work also proposes a lamp driving circuit, which includes a transformer, a printed circuit board, and a capacitor. The transformer system has a secondary side, and the capacitor system is disposed on the printed circuit board, and the capacitor system is coupled to the secondary side of the transformer. The capacitor is composed of a first metal foil and a second metal foil on the printed circuit board. Embodiment 3A is a schematic circuit diagram of a backlight module 3 with multiple lamps according to an embodiment of the present invention. The backlight module 3 includes at least a printed circuit board (PCB) 10, a transformer 11, a capacitor 30, and a lamp tube 13. The transformer 11 has a secondary side. The capacitor 30 is arranged on the printed M261718 circuit board (PCB) IO, and the capacitor 12 is coupled to the secondary side of the transformer through an interface port (not shown) of the printed circuit board (PCB) IO, and the lamp tube 13 is coupled Capacitor 30. In addition, the transformer 11 and the capacitor 30 form a lamp driving circuit. When the leakage inductance of the transformer 11 and the oscillation frequency of the capacitor 30 reach the oscillating frequency, it can be used to start the corresponding lamp 13. In addition, the printed circuit board 10 A copper foil or metal foil (shaded portion) is provided or embedded on the front side as the first pole 30a of the capacitor 30, and another copper foil or metal foil is provided or embedded on the reverse side as the capacitor 30. The second electrode 30b, therefore, this capacitor 30 is a typical PCB copper foil capacitor. According to the calculation formula of the capacitance, such as the following formula:
r A C = ε—r A C = ε—
D 其中，C為PCB銅箔電容30之容值，Α為銅箔面積，D為印刷 電路板之厚度，且^為印刷電路板(PCB)之介電係數。因此，由上述式 子中可知，PCB銅箔電容30之電容量，可利用調整印刷電路板之厚度 D以及第一電極與第二電極之面積A的方式來達成，如第3B圖所示。 依據本創作之實施例，係利用PCB銅箔電容30來取代習知之積 層陶瓷電容(MLCC)。由於PCB銅箔電容30係由單一電介質層所構成 且兩電極係嵌於PCB之中，因此，在組裝具有多燈管之背光模組3時， 較不易因為不小心彎曲PCB板而造成電容折損或損傷之情形，故可顯 著地增進背光模組3之製造品質；此外，更可進一步地增加背光模組 3之使用壽命。 再者，PCB電容30之價錢比MLCC便宜，因此，若以PCB銅箔 電容30來取代習知之MLCC，則更可降低背光模組3之製造成本。 M261718 本創作雖以較佳實施例揭露如上，然其並非用以限定本剑作，在 何熟習此項技藝者’在不麟賴作之精神㈣_，料做些許的5 更動□此本創作之保護範圍當視後附之中請專利範圍所界定 者為準。 M261718 【圖式簡單說明】 第1圖所示係顯示為習知背光模組1之方塊圖。 第2圖係顯示為習知具有多燈管之背光模組2之電路示意圖。 第3A圖係顯示為本創作實施例中具有多燈管之背光模組3 之電路示意圖。 第3B圖係顯示為銅箔電容30之結構示意圖。 【主要元件符號說明】 1、2、3〜背光模組； 20〜諧振電路； 11〜變壓器； 10〜印刷電路板； 12、30〜電容； 13〜燈管； A〜面積； D〜PCB厚度； 3 0a〜第一極； 30b〜第二極。D where C is the capacitance of the PCB copper foil capacitor 30, A is the copper foil area, D is the thickness of the printed circuit board, and ^ is the dielectric constant of the printed circuit board (PCB). Therefore, it can be known from the above formula that the capacitance of the PCB copper foil capacitor 30 can be achieved by adjusting the thickness D of the printed circuit board and the area A of the first electrode and the second electrode, as shown in FIG. 3B. According to the embodiment of the present invention, a PCB copper foil capacitor 30 is used instead of the conventional multilayer ceramic capacitor (MLCC). Since the PCB copper foil capacitor 30 is composed of a single dielectric layer and the two electrodes are embedded in the PCB, when assembling the backlight module 3 with multiple lamps, it is less likely to cause capacitor damage due to careless bending of the PCB board. Or damage, it can significantly improve the manufacturing quality of the backlight module 3; in addition, the life of the backlight module 3 can be further increased. Moreover, the price of the PCB capacitor 30 is cheaper than that of the MLCC. Therefore, if the conventional MLCC is replaced by the PCB copper foil capacitor 30, the manufacturing cost of the backlight module 3 can be further reduced. M261718 Although this work is disclosed as above with a preferred embodiment, it is not intended to limit the work of this sword. Why is the person skilled in this art 'in the spirit of incompetent work?', 5 changes are expected. The scope of protection shall be as defined in the appended patent scope. M261718 [Brief description of the diagram] The block diagram shown in Figure 1 is a conventional backlight module 1. FIG. 2 is a schematic circuit diagram of a conventional backlight module 2 with multiple lamps. FIG. 3A is a schematic circuit diagram of the backlight module 3 with multiple lamps in the embodiment of the present invention. FIG. 3B is a schematic structural view of a copper foil capacitor 30. [Description of main component symbols] 1, 2, 3 ~ backlight module; 20 ~ resonance circuit; 11 ~ transformer; 10 ~ printed circuit board; 12, 30 ~ capacitor; 13 ~ lamp tube; A ~ area; D ~ PCB thickness 30a ~ first pole; 30b ~ second pole.