1326786 九、發明說明： 【發明所屬之技術領域】 • 本發明係關於一種平面顯示裝置及其背光模組，特別 關於一種液晶顯示裝置及其背光模組。 • 【先前技術】 一般液晶顯示裝置主要係包括一液晶顯示單元及一 ' 背光模組，其中背光模組大致又可分為直下型背光模組以 • 及側光型背光模組兩種類型。 近來隨著液晶顯示裝置之普遍利用以及技術之改 良，其顯示之尺寸也隨之變大，尤其使用在電視上時，目 前最為被消費者接受者大多在27〜42吋之間。而對於作為 大尺寸之液晶顯示裝置而言，其背光模組大多為直下式背 光模組，當然，在直下式背光模組中所需之發光單元數量 係比側光型背光模組所需之發光單元來的多。 .承上所述，不管是何種型態之背光模組，均需要藉由 ® 至少一驅動電路板來加以驅動背光模組中之發光單元，目 - 前最常作為發光單元者係為冷陰極燈管，而用以驅動發光 單元者乃是經由驅動電路板所提供之一高壓驅動訊號來 . 加以驅動。如圖1所示，通常為使發光單元11(冷陰極燈 管）以及驅動電路板13能順利連接以及組裝，業者會於發 光單元11之電極端111、112電連接一耐高壓且具有一連 接端子121之連接線12,再經由連接線12之連接端子121 連結於驅動電路板13之一連接端子131。此時，驅動電路 5 Γ326786 板13所輸出之高壓驅動訊號即可經由連接端子13卜連接 端子121以及連接線12而傳送至發光單元11並加以驅動 • 發光單元11。 就上述背光模組而言，由於驅動電路板13所提供之 - 高壓驅動訊號通常係為仟伏特（KV)等級以上之高壓，因此 當驅動電路板13之連接端子131與連接線12之連接端子 121沒有連接好或是接觸不良時，經常會引發跳火現象 (arcing)，甚至因此而引起巨大災害。另外，由於發光單元 • 11及驅動電路板13之間必須藉由一連接線12連接，因此 在組裝的時候必須藉助人工，換言之，即是無法自動化生 產。又由於連接線12以及連接端子121、連接端子131均 必須要是能耐高壓，因此必須花費較高的成本。此外，由 於流經連接線12之訊號為仟伏特等級之高壓高頻訊號（數 十KHz)，因此連接線12很容易因空間雜散電容產生電容 耦合之漏電現象，進而造成用以驅動發光單元之電流不易 控制。 ® 承上所述，如何提供一種有利於自動化生產且降低成 - 本’同時又能避免跳火現象及漏電現象之液晶顯不裝置及 .· 其背光模組，實為當前重要課題之一。 【發明内容】 有鑑於上述課題，本發明之目的為提供一種避免跳火 現象及漏電現象產生且便於自動化生產之液晶顯示裝置 及其背光模組。 包括緣是，為達上述目的，依據本發明之一種背光模組係 路板至少一發光單元、一功率訊號產生電路板及一控制電 產生一發光單元具有一電極接腳；功率訊號產生電路板係 電連驅動發光單元之功率訊號，發光單元之電極接腳係 路接於功率訊號產生電路板；控制電路板具有一切換迴 控制電路板係產生一切換訊號，俾使切換迴路依據 =換訊號來進行開、關。另外，功率訊號產生電路板係電 接於控制電路板，並依據切換迴路之開、關而產生功率 訊號。 ^承上所述，因依據本發明之一種背光模組之發光單元 係直接與功率訊號產生電路板電連接，換言之，由功率訊 號產生電路板所提供之高壓驅動訊號係直接輸入至發光 單π中，且功率訊號產生電路板與控制電路板之間係屬於 較低壓的電性傳輸，因此可以避免因高壓所產生的跳火現 象。另外，由於發光單元係直接與驅動訊號產生電路板電 連接，因此無須藉由一連接線來連接，換言之，發光單元 與驅動訊號產生電路板之間的連接，可以直接藉由自動化 機器設備來進行，而無須藉由人工作業完成。又，由於發 光單元係直接與驅動訊號產生電路板電連接，因此無須藉 由耐高壓之連接線以及連接端子來連接，換言之，即可省 下尚單價之财高壓連接線及連接端子的成本，同時也可以 避免漏電現象的產生。 另外’依據本發明之一種液晶顯示裝置係具有一背光 模組，而背光模組係包括至少一發光單元、一功率訊號產 1326786 生電路板及一控制電路板。發光單元具有一電極接腳；功 率訊號產生電路板係產生一驅動發光單元之功率訊號，發 光單元之電極接腳係電連接於功率訊號產生電路板；控制 電路板具有一切換迴路，而控制電路板係產生一切換訊 號’俾使切換迴路依據切換訊號來進行開、關β另外，功 率訊號產生電路板係電連接於控制電路板，並依據切換迴 路之開、關而產生功率訊號。 承上所述，於本發明之液晶顯示裝置之背光模組中， • 由於發光單元係直接與驅動訊號產生電路板電連接，換言 之’由驅動訊'號產生電路板所提供之高壓驅動訊號係直接 輸入至發光單元中’且驅動訊號產生電路板與控制電路板 之間係屬於較低壓的電性傳輸，因此可以避免因高壓所產 生的跳火現象。另外，由於發光單元係直接與驅動訊號產 生電路板電連接’因此無須藉由一連接線來連接，換言 之’發光單元與驅動訊號產生電路板之間的連接，可以直 接藉由自動化機器設備來進行’而無須藉由人工作業完 鲁成。又，由於發光單元係直接與驅動訊號產生電路板電連 接，因此無須藉由耐高壓之連接線以及連接端子來連接， 換言之，即可省下高單價之耐高壓連接線及連接端子成 本，同時也可以避免漏電現象的產生。 【實施方式】 以下將參照相關圖式，說明依本發明較佳實施例之液 晶顯示裝置及其背光模組’其中相同的元件將以相同的= 8 1326786 照符號加以說明。 如圖2所示，依據本發明較佳實施例之背光模組係包 括至少一發光單元21、一功率訊號產生電路板22、以及 - 一控制電路板23。 發光單元21具有一電極211及一電極接腳212。本實 施例中，發光單元21係為冷陰極螢光燈管，其係具有兩 個電極211及兩個分別與該等電極211連接之電極接腳 212。另外，發光單元21亦可為一熱陰極螢光燈管或一平 籲 面燈管。 功率訊號產生電路板22係產生一驅動發光單元21之 功率訊號，其中，發光單元21之電極接腳212係電連接 於功率訊號產生電路板22。本實施例中，發光單元21之 電極接腳212係先以焊接方式於功率訊號產生電路板22 上形成一銲接點251，進而與功率訊號產生電路板22電連 接，之後再於電極接腳212及銲接點251上形成一耐高電 '壓之保護層252。當然，發光單元21之電極接腳212亦可 ® 利用其他方式與功率訊號產生電路板22電連接。 控制電路板23具有一切換迴路231，且控制電路板 ；- 23係產生一切換訊號，俾使切換迴路231依據切換訊號來1326786 IX. Description of the Invention: [Technical Field] The present invention relates to a flat display device and a backlight module thereof, and more particularly to a liquid crystal display device and a backlight module thereof. • [Prior Art] A typical liquid crystal display device mainly includes a liquid crystal display unit and a 'backlight module. The backlight module can be roughly divided into a direct type backlight module and a side light type backlight module. Recently, with the general use of liquid crystal display devices and the improvement of technology, the size of the display has also become large, especially when used on televisions, most of the consumers are currently between 27 and 42 inches. For a large-sized liquid crystal display device, the backlight modules are mostly direct-lit backlight modules. Of course, the number of light-emitting units required in the direct-lit backlight module is better than that required for the edge-lit backlight module. There are many light-emitting units coming. According to the above description, no matter what type of backlight module, it is necessary to drive the light-emitting unit in the backlight module by using at least one driving circuit board, and the front-most most used as the light-emitting unit is cold. The cathode lamp, which is used to drive the light-emitting unit, is driven by a high-voltage driving signal provided by the driving circuit board. As shown in FIG. 1 , in order to enable the light-emitting unit 11 (cold cathode fluorescent tube) and the driving circuit board 13 to be smoothly connected and assembled, the electrode terminals 111 and 112 of the light-emitting unit 11 are electrically connected to a high voltage and have a connection. The connection line 12 of the terminal 121 is connected to one of the connection terminals 131 of the drive circuit board 13 via the connection terminal 121 of the connection line 12. At this time, the high-voltage driving signal outputted from the driving circuit 5 Γ 326786 board 13 can be transmitted to the light-emitting unit 11 via the connection terminal 13 and the connection terminal 12 and driven to drive the light-emitting unit 11. In the above backlight module, since the high voltage driving signal provided by the driving circuit board 13 is usually a high voltage above the volts (KV) level, when the connection terminal 131 of the driving circuit board 13 and the connecting line 12 are connected 121 When there is no connection or bad contact, it often causes arcing, and even causes huge disasters. In addition, since the light-emitting unit 11 and the driving circuit board 13 must be connected by a connecting wire 12, it is necessary to use manual work in assembly, in other words, it is impossible to automate the production. Further, since the connecting wire 12, the connecting terminal 121, and the connecting terminal 131 must be capable of withstanding high voltage, it is expensive. In addition, since the signal flowing through the connection line 12 is a high-voltage high-frequency signal (tens of KHz) of a volt-volt level, the connection line 12 is liable to cause a capacitive coupling leakage phenomenon due to the spatial stray capacitance, thereby causing the driving of the light-emitting unit. The current is not easy to control. ® As stated above, how to provide a liquid crystal display device that is conducive to automated production and reduces the occurrence of flashover and leakage is also one of the current important topics. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a liquid crystal display device and a backlight module thereof which are capable of avoiding a flashover phenomenon and a leakage phenomenon and facilitating automated production. In addition, in order to achieve the above object, at least one light emitting unit, a power signal generating circuit board and a control power generating light emitting unit of the backlight module circuit board according to the present invention have an electrode pin; the power signal generating circuit board The electrical connection drives the power signal of the illumination unit, and the electrode pin system of the illumination unit is connected to the power signal generation circuit board; the control circuit board has a switching back control circuit board to generate a switching signal, so that the switching circuit is based on the = change signal To open and close. In addition, the power signal generating circuit board is electrically connected to the control circuit board, and generates a power signal according to the opening and closing of the switching circuit. According to the above description, the illumination unit of the backlight module according to the present invention is directly connected to the power signal generating circuit board. In other words, the high voltage driving signal provided by the power signal generating circuit board is directly input to the light emitting unit π. In the middle, and the power signal generating circuit board and the control circuit board belong to the lower voltage electrical transmission, the flashover phenomenon caused by the high voltage can be avoided. In addition, since the light emitting unit is directly connected to the driving signal generating circuit board, it is not required to be connected by a connecting wire. In other words, the connection between the light emitting unit and the driving signal generating circuit board can be directly performed by an automated machine device. Without having to do it by manual work. Moreover, since the light-emitting unit is directly connected to the driving signal generating circuit board, it is not necessary to be connected by the high-voltage resistant connecting wire and the connecting terminal, in other words, the cost of the high-priced connecting wire and the connecting terminal of the unit price can be saved. At the same time, it can also avoid the occurrence of leakage. Further, a liquid crystal display device according to the present invention has a backlight module, and the backlight module includes at least one light emitting unit, a power signal source 1326786, and a control circuit board. The light emitting unit has an electrode pin; the power signal generating circuit board generates a power signal for driving the light emitting unit, and the electrode pin of the light emitting unit is electrically connected to the power signal generating circuit board; the control circuit board has a switching circuit, and the control circuit The board generates a switching signal '俾, so that the switching circuit is turned on and off according to the switching signal. In addition, the power signal generating circuit board is electrically connected to the control circuit board, and generates a power signal according to the opening and closing of the switching circuit. As described above, in the backlight module of the liquid crystal display device of the present invention, the light-emitting unit is directly connected to the driving signal generating circuit board, in other words, the high-voltage driving signal system provided by the driving signal generating circuit board. Directly input into the light-emitting unit' and the drive signal generating circuit board and the control circuit board are electrically transmitted at a lower voltage, so that the flashover caused by the high voltage can be avoided. In addition, since the light-emitting unit is directly electrically connected to the driving signal generating circuit board, it is not necessary to be connected by a connecting wire. In other words, the connection between the light-emitting unit and the driving signal generating circuit board can be directly performed by an automated machine device. 'It is not necessary to complete Lu Cheng by manual work. Moreover, since the light-emitting unit is directly electrically connected to the driving signal generating circuit board, it is not required to be connected by the high-voltage resistant connecting wire and the connecting terminal. In other words, the high-priced high-voltage resistant connecting wire and the connecting terminal cost can be saved. It is also possible to avoid the occurrence of leakage. [Embodiment] Hereinafter, a liquid crystal display device and a backlight module thereof according to a preferred embodiment of the present invention will be described with reference to the related drawings, wherein the same elements will be described by the same reference numeral = 8 1326786. As shown in FIG. 2, a backlight module according to a preferred embodiment of the present invention includes at least one light emitting unit 21, a power signal generating circuit board 22, and a control circuit board 23. The light emitting unit 21 has an electrode 211 and an electrode pin 212. In the present embodiment, the light-emitting unit 21 is a cold cathode fluorescent lamp having two electrodes 211 and two electrode pins 212 respectively connected to the electrodes 211. In addition, the light emitting unit 21 can also be a hot cathode fluorescent tube or a flat surface tube. The power signal generating circuit board 22 generates a power signal for driving the light emitting unit 21, wherein the electrode pins 212 of the light emitting unit 21 are electrically connected to the power signal generating circuit board 22. In this embodiment, the electrode pins 212 of the light-emitting unit 21 are first soldered to form a solder joint 251 on the power signal generating circuit board 22, and then electrically connected to the power signal generating circuit board 22, and then to the electrode pins 212. A protective layer 252 resistant to high electric pressure is formed on the solder joint 251. Of course, the electrode pins 212 of the light emitting unit 21 can also be electrically connected to the power signal generating circuit board 22 by other means. The control circuit board 23 has a switching circuit 231, and the control circuit board generates a switching signal, so that the switching circuit 231 is based on the switching signal.
(D . 進行開、關的動作。功率訊號產生電路板22係電連接於 控制電路板23。本實施例中，控制電路板23係可藉由一 連接線（圖未示）而與功率訊號產生電路板22電連接，且功 率訊號產生電路板22係依據切換迴路231之開、關而產 生功率訊號。 9 1326786 請參照圖3所示，依據本發明較佳實施例之背光模組 更可包括一殼體24,其係具有一反射面241。發光單元21 與功率訊號產生電路板22係分別位於反射面241側，且 分別設置於殼體24上。本實施例中，殼體24係為一金屬 殼體。另外，功率訊號產生電路板22係具有一迴路表面 220，其係與反射面241約呈垂直。當然，基於殼體設計 以及應用之考量，在實際實施上，迴路表面220亦可與反 射面241約呈平行（如圖2所示）。 於此，要特別說明的是，由於功率訊號產生電路板22 係位於金屬殼體24之反射面241側，且由金屬殼體24所 屏蔽，因此，可以有效防止由功率訊號產生電路板22之 高壓所產生之電磁干擾(EMI)現象產生。另外，如圖3所 示，由於控制電路板23之操作電壓相較於功率訊號產生 電路板22之操作電壓係較為低，因此，其係可以設置於 殼體24之另一側。 另外，於上述說明中，發光單元21係為一 U型之冷 陰極螢光燈管，而當發光單元21’為直型之冷陰極螢光燈 管，且需要雙邊（雙高壓）驅動時，如圖4所示，發光單元 21 ’之兩端係可分別設置一功率訊號產生電路板22’來加以 驅動發光單元21’，而控制電路板23’則係分別與設置於發 光單元21’兩端之功率訊號產生電路板22電連接。 請再參照圖5所示，其係顯示功率訊號產生電路板22 及控制電路板23之切換迴路231之一具體構成。切換迴 路231係依據控制電路板23所產生之一組切換訊號, 1326786 PU、Pib來進行開、關。功率訊號產生電路板22係包括 一升屋迴路221，其係與控制信號電路板23之切換迴路 231電連接，而升壓迴路221則係藉由切換迴路231之開、 • 關而產生功率訊號。本實施例中，功率訊號產生電路板22 之升壓迴路221係包括一變壓器τΐ及一電容器c卜 變壓器T1係為一中間抽頭的變壓器，即是具有將一 直流訊號DC輸入之端子；而控制電路板23之切換 迴路231係包括兩電晶體qi、q2，該等電晶體qi、 鲁Q2係分別電連接於電容器Ci之一端，而該等電晶 體Ql、Q2係分別依據切換訊號Pia ' Pib來進行開、 關的動作。當然’升壓迴路221亦可利用一壓電 (Piezoelectric)元件來組成。 另外，請再參照圖6所示，功率訊號產生電路板22 及控制電路板23亦可為另一構成。亦即升壓迴路夏， 係包括一變壓器T2 ;而切換迴路23 1 ’係包括兩電晶 鲁體Q3、Q4 ’該等電晶體Q3、Q4係分別電連接於變 壓器T2之一次線圈側，而該等電晶體q3、q4係分 別依據切換訊號Pia、Pib來進行開、關。本實施例中， 電晶體Q1〜Q4係可為場效電晶體（FET)，例如係為 E-MOSFET或係為D-MOSFET。一般而言，在背光模組運 作的情況下，切換迴路231(231 ’）因電晶體的關係，經常是 熱能產生的來源之一。 承上所述，因依本發明之背光模組之發光單元係直 接與驅動訊號產生電路板電連接，換言之，由驅動訊號產 11 1326786 生電路板所提供之高壓驅動訊號係直接輸人至發光时元 中，且驅動訊號產生電路板與控制電路板之間係 壓的電性傳輸，因此可以避免因高壓所產生的跳火現-此外’由於發光單it係直接與驅動訊號產 接’因此無須再藉由-連接線來連接，換言之 3連 與驅動訊號產生電路板之間的連接，可以直接 =70 機器設備來進行，而無須藉由人工作業完成。乂 = 光單元係直接與驅動訊號產生電路板電連接，因此無項 由-耐高廢之連接線及連接端子來連接，換言之，即、= 接線及連接端子之成本，同時也可以 避免漏電現象產生。再者，將較容易發熱之切換 ==之控制電路板上’而遠離功率訊號產:電 路板之升壓轉，亦可以較容_提⑲熱 說明^上係針對依本發明較佳實施例之背光模組之詳細 以下，蔣針對本發明之液晶顯示裝置来做說明。 ，據本發明較佳實施例之液晶顯示裝置m要包括 ϋ顯示單元及一背光模組。由於本發明較佳實施例之 S顯示裝置之背光模組之特點係如同前述，故於此不再 啻U…电崎极心。發光單元具有一 腳212 ;功率訊號產生電路板22係產生一驅動發光 示劈J7。月再參照® 2所示’依本發明較佳實施例之液晶顯 產生係包括至少一發光單元21、-功率訊號 電搞姑以及一控制電路板23。發光單元具有 电極接磁7 01 Ο · —L +_____ Φ 12 1326786 I疋21之功率訊號，發光單元21之電極接腳2i2係電連 接於功率訊號產生電路板22 ;控制電路板23具有一切換 迴路231，而控制電路板23係產生一切換訊號，俾使切換 迴路231依據切換訊號來進行開、關。另外，功率訊號產 生電路板22係電連接於控制電路板23，並依據切換迴路 之開、關動作而產生功率訊號。(D. The operation of turning on and off. The power signal generating circuit board 22 is electrically connected to the control circuit board 23. In this embodiment, the control circuit board 23 is connected to the power signal by a connecting line (not shown). The circuit board 22 is electrically connected, and the power signal generating circuit board 22 generates a power signal according to the opening and closing of the switching circuit 231. 9 1326786 Referring to FIG. 3, the backlight module according to the preferred embodiment of the present invention may further The housing 24 includes a reflective surface 241. The light emitting unit 21 and the power signal generating circuit board 22 are respectively disposed on the side of the reflecting surface 241, and are respectively disposed on the housing 24. In the embodiment, the housing 24 is provided. In addition, the power signal generating circuit board 22 has a circuit surface 220 which is approximately perpendicular to the reflecting surface 241. Of course, based on the housing design and application considerations, in actual implementation, the circuit surface 220 It may also be parallel to the reflecting surface 241 (as shown in FIG. 2). Here, it is particularly noted that the power signal generating circuit board 22 is located on the side of the reflecting surface 241 of the metal casing 24, and is made of a metal casing. 24 screens Therefore, it is possible to effectively prevent electromagnetic interference (EMI) generated by the high voltage of the power signal generating circuit board 22. Further, as shown in FIG. 3, since the operating voltage of the control circuit board 23 is compared with the power signal generating circuit The operation voltage of the board 22 is relatively low, and therefore, it can be disposed on the other side of the casing 24. In addition, in the above description, the light-emitting unit 21 is a U-shaped cold cathode fluorescent tube, and when the light is emitted The unit 21' is a straight type cold cathode fluorescent lamp, and when bilateral (double high voltage) driving is required, as shown in FIG. 4, a power signal generating circuit board 22' can be respectively disposed at both ends of the light emitting unit 21'. The light-emitting unit 21' is driven, and the control circuit board 23' is electrically connected to the power signal generating circuit board 22 disposed at both ends of the light-emitting unit 21'. Referring to FIG. 5, the power signal generating circuit is displayed. One of the switching circuit 231 of the board 22 and the control circuit board 23 is specifically configured. The switching circuit 231 is turned on and off according to a group switching signal generated by the control circuit board 23, 1326786 PU, Pib. The circuit board 22 includes a liter housing circuit 221 electrically connected to the switching circuit 231 of the control signal circuit board 23, and the boosting circuit 221 generates a power signal by switching the switching circuit 231 on and off. The boosting circuit 221 of the power signal generating circuit board 22 includes a transformer τ ΐ and a capacitor c. The transformer T1 is a middle tapped transformer, that is, a terminal having a DC signal input to the DC signal; and the control circuit board 23 The switching circuit 231 includes two transistors qi, q2, which are respectively electrically connected to one end of the capacitor Ci, and the transistors Q1 and Q2 are respectively opened according to the switching signal Pia 'Pib. , off the action. Of course, the boost circuit 221 can also be constructed using a piezoelectric element. In addition, referring to FIG. 6, the power signal generating circuit board 22 and the control circuit board 23 may have another configuration. That is, the booster circuit summer includes a transformer T2; and the switching circuit 23 1 ' includes two electro-crystals Q3, Q4 'the transistors Q3 and Q4 are electrically connected to the primary coil side of the transformer T2, respectively. The transistors q3 and q4 are turned on and off according to the switching signals Pia and Pib, respectively. In this embodiment, the transistors Q1 QQ4 may be field effect transistors (FETs), such as E-MOSFETs or D-MOSFETs. In general, in the case of a backlight module operation, the switching loop 231 (231 ') is often one of the sources of thermal energy generation due to the relationship of the transistors. As described above, the light-emitting unit of the backlight module according to the present invention is directly connected to the driving signal generating circuit board. In other words, the high-voltage driving signal provided by the driving signal 11 11326786 circuit board is directly input to the light emitting unit. In the time element, and the driving signal generates a voltage transmission between the circuit board and the control circuit board, it is possible to avoid the flashover caused by the high voltage - in addition, since the light emitting unit is directly connected to the driving signal, It is no longer necessary to connect by means of a connection line, in other words, the connection between the connection 3 and the drive signal generating circuit board can be carried out directly by the machine device without manual work.乂 = The optical unit is directly connected to the drive signal generating circuit board, so there is no connection between the high-to-high-resistance connecting line and the connecting terminal. In other words, the cost of the wiring and the connecting terminal can also avoid leakage. produce. Furthermore, the switch on the control circuit board that is more prone to heat generation == and away from the power signal generation: the boosting of the circuit board can also be compared to the preferred embodiment of the present invention. The details of the backlight module will be described below with respect to the liquid crystal display device of the present invention. The liquid crystal display device m according to the preferred embodiment of the present invention includes a ϋ display unit and a backlight module. Since the backlight module of the S display device of the preferred embodiment of the present invention is characterized by the foregoing, it is no longer 啻U...Electricity. The lighting unit has a foot 212; the power signal generating circuit board 22 generates a driving illumination indicator J7. Referring to the second embodiment, the liquid crystal display system according to the preferred embodiment of the present invention includes at least one light emitting unit 21, a power signal, and a control circuit board 23. The light-emitting unit has a power signal of the electrode 7101 Ο · L +_____ Φ 12 1326786 I 疋 21, the electrode pin 2i2 of the light-emitting unit 21 is electrically connected to the power signal generating circuit board 22; the control circuit board 23 has a The circuit 231 is switched, and the control circuit board 23 generates a switching signal to enable the switching circuit 231 to turn on and off according to the switching signal. In addition, the power signal generating circuit board 22 is electrically connected to the control circuit board 23, and generates a power signal according to the opening and closing operations of the switching circuit.
承上所述，於本發明之液晶顯示裴置及其背光模組 中，由於發光單元係直接與功率訊號產生電路板電連接， 換言之’由功率訊號產生電路板所提供之高壓功率訊號係 直接輸入至發光單元中，且功率訊號產生電路板與控制電 路板之_屬於較低壓的傳輸，因此可以避免因高壓 所產生的跳火現象。另外，由於發光單元係直接與功率訊 號產生電路板電連接’因此無須藉由一連接線來連接，換 言之，發光單it與功率訊號產生電路板之間的連接，可以 直接藉由自動化機器⑽來進行，而無賴由人工作業完 成。又’由於發光單元係直接與功率訊號產生電路板電連 接’因此無須藉由-耐高壓之連接線及連接端子來連接， 換言之，即可省下高單價之耐高壓連接線及連接端子之成 本，同時也可以避免漏電現象。再者，將較容易發執之切 換迴路設置於所處"較大之控制電路板上，而遠離功率 訊號產生電路板之升壓Μ，亦可崎容易地提升散熱效 率。 以上所述僅為舉例性，而非兔阳 非為限制性者。任何未脫離 本發明之㈣與a，Μ魏叙粒修改㈣更，均 13 1326786 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1為一示意圖，顯示習知背光模組之要部構成； 圖2為一示意圖，顯示依本發明較佳實施例之背光模 組之要部構成， 圖3為一示意圖，顯示依本發明較佳實施例之背光模 組之另一要部構成，其中，功率訊號產生電路板之一迴路 ¥ 表面係與殼體之反射面垂直； 圖4為一示意圖，顯示依本發明較佳實施例之背光模 組之又一要部構成，其中，發光單元兩側係分別設置有一 功率訊號產生電路板； 圖5為一示意圖，顯示依本發明較佳實施例之背光模 組之功率訊號產生電路板及控制電路板之要部元件構 成；以及 圖6為一示意圖，顯示依本發明較佳實施例之背光模 • 組之之功率訊號產生電路板及控制電路板之另一要部元 件構成。 元件符號說明： 11 發光單元 111、112 電極端 12 連接線 121、131 連接端子 1326786As described above, in the liquid crystal display device and the backlight module of the present invention, since the light emitting unit is directly connected to the power signal generating circuit board, in other words, the high voltage power signal provided by the power signal generating circuit board is directly Input into the lighting unit, and the power signal generating circuit board and the control circuit board are lower-voltage transmission, so that the flashover caused by the high voltage can be avoided. In addition, since the light-emitting unit is directly connected to the power signal generating circuit board, it is not required to be connected by a connecting wire. In other words, the connection between the light-emitting unit and the power signal generating circuit board can be directly connected by the automatic machine (10). Conducted, and rogues are done by manual work. In addition, since the light-emitting unit is directly connected to the power signal generating circuit board, it is not necessary to be connected by the high-voltage-resistant connecting line and the connecting terminal. In other words, the cost of the high-priced high-voltage connecting line and the connecting terminal can be saved. At the same time, it can also avoid leakage. Furthermore, it is easy to increase the heat dissipation efficiency by setting the switching circuit that is easier to implement on the larger control circuit board and away from the power signal generating board. The above description is only exemplary, and not the rabbit is not a limitation. Any modification of (4) and a, ΜWeiwei granules (4), which are not deviated from the present invention, are all included in the scope of the appended patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the main components of a conventional backlight module; FIG. 2 is a schematic view showing the main components of a backlight module according to a preferred embodiment of the present invention, and FIG. FIG. 4 is a schematic diagram showing another main part of a backlight module according to a preferred embodiment of the present invention, wherein a surface of the power signal generating circuit board is perpendicular to a reflecting surface of the housing; FIG. 4 is a schematic view showing In another embodiment of the backlight module of the preferred embodiment of the present invention, a power signal generating circuit board is disposed on each side of the light emitting unit. FIG. 5 is a schematic view showing a backlight module according to a preferred embodiment of the present invention. The power signal generating circuit board of the group and the main components of the control circuit board; and FIG. 6 is a schematic view showing the power signal generating circuit board and the control circuit board of the backlight module according to the preferred embodiment of the present invention. A main component is formed. Symbol description: 11 Light unit 111, 112 Electrode end 12 Connection line 121, 131 Connection terminal 1326786
13 驅動電路板 21、 21’ 發光單元 211 電極 212 電極接腳 22 > 22， 功率訊號產生電路板 220 迴路表面 221 升壓迴路 23、 23， 控制電路板 231 切換迴路 24 殼體 241 反射面 251 銲接點 252 保護層 Cl 電容器 T1、 T2 變壓器 Q1-Q4 電晶體 Pia ' Pib 切換訊號 DC 直流訊號 1513 drive circuit board 21, 21' light-emitting unit 211 electrode 212 electrode pin 22 > 22, power signal generating circuit board 220 circuit surface 221 boost circuit 23, 23, control circuit board 231 switching circuit 24 housing 241 reflective surface 251 Solder Joint 252 Protective Layer Cl Capacitor T1, T2 Transformer Q1-Q4 Transistor Pia ' Pib Switching Signal DC DC Signal 15