1-356362 電源供應部110和換流器120兩者相互隔開。 整流部111將交流電的輸入功率轉換為直流電的輸 入功率。由整流部111所轉換的直流電輸入功率會藉由功 ' 率因子校正線圈112調整一功率因子而使直流電的輸入功 ，_率轉換到一預定強度（典型為380V)，這是為了要增強背 . 光組件的功率。由功率因子校正線圈112轉換的直流電源 '則會再藉由直流電/直流電變流器113轉換到另一預定強 度（如24V)以及同時執行電源供應及負荷的隔離。 • 因此，直流電/直流電變流器113輸出具有預定強度 的隔離直流電源至換流器120。 換流器120有一主要功能為控制固定電流以提供給 分別的燈管，當燈管放電時或放電之後，在燈管間的電流 偏差可降至最小。 相應地，換流器120裡多個變壓器122分別的與燈管 130連結，且每個變壓器122不斷地維持一次級輸出電流 以執行上述的功能。 * 然而在傳統的背光組件中，電源供應部110和換流器 120兩者是相互分開的，所以在電路的設計上及生產上是 . 相當困難的。於是，生產量減少以及能源消耗增加。 另外，當一變壓器只有與一燈管相連，則整體的電路 體積增加，且用以驅動傳統背光組件之電源的效率會降 低。此外，當燈管直接與變壓器連接而沒有一平衡電路部 時，傳統之背光組件之發光特性減少。 OPS119-06-142-TW 7 B56362 【發明円容j1-356362 The power supply unit 110 and the inverter 120 are both spaced apart from each other. The rectifying unit 111 converts the input power of the alternating current into the input power of the direct current. The DC input power converted by the rectifying unit 111 adjusts a power factor by the power factor correction coil 112 to convert the input power of the DC power to a predetermined intensity (typically 380V), in order to enhance the back. The power of the optical component. The DC power source 'converted by the power factor correction coil 112' is then switched to another predetermined intensity (e.g., 24V) by the DC/DC converter 113 and simultaneously performs power supply and load isolation. • Therefore, the DC/DC current converter 113 outputs an isolated DC power source having a predetermined intensity to the inverter 120. The inverter 120 has a primary function of controlling a fixed current to be supplied to the respective lamps. When the lamps are discharged or discharged, the current deviation between the lamps can be minimized. Accordingly, a plurality of transformers 122 in the inverter 120 are respectively coupled to the lamp tubes 130, and each of the transformers 122 continuously maintains a primary output current to perform the functions described above. * However, in the conventional backlight assembly, the power supply portion 110 and the inverter 120 are separated from each other, so it is quite difficult in design and production of the circuit. As a result, production is reduced and energy consumption is increased. In addition, when a transformer is connected to only one tube, the overall circuit volume is increased, and the efficiency of the power source for driving the conventional backlight unit is lowered. In addition, when the lamp is directly connected to the transformer without a balance circuit portion, the illumination characteristics of the conventional backlight assembly are reduced. OPS119-06-142-TW 7 B56362
、以本發明之第一方面，一背光組件包含-切換部，用 以根據-控制訊號如刀換—輸人錢之關以輪出 級電壓’·-電壓增強部，用以增強電㈣強部之 接收的初級電愿以於電”強部—第二端形成—次 壓，其中，此電壓增強部之第一端及第二端相互為為電性 隔離的，-反饋連結，用以從第二端提供控制訊號至第一 端；以及一訊號隔離部’位於該反饋連結内，用以從反铲 連結的第二端部分傳送控龍號至祕部，㈣換部與』 饋連結之第-端部分城，此訊號隔離部並用以電性隔離 此反饋連結之第一端部分與第二端部分。 根據本發明之第二方面，一背光組件包含-切換部， 用以根據-控制訊號去切換—直流電壓之開關以輸出一 初級電壓；一電壓增強部，用以增強由電壓增強部之第一 端接收的初級電壓，以於電壓增強部之第二端形成一次級 電壓，其中，該電壓增強部之第—端及第二端相互為電性 隔離的；複數個燈管，以並聯相互連接；一平衡電路部， 係連接此電壓增強部的第二端以及此些燈管，以便均勻地 ，給此些燈管由該次級電壓產生的一交流電，以使此些燈 官的焭度一致；一偵測部，位於該電壓增強部的第二端， 用以偵測此些燈管至少一電壓及電流以輸出一反饋訊 ，，以一致地維持此些燈管的亮度；一控制部，用以接收 從偵測部的反饋訊號，以輸出控制訊號去控制此切換部； 以及一訊號隔離部，用以從電壓增強部的第二端傳送反饋 OPS119-06-142-TW 8 Γ356362 訊號或是控制訊號至位於第一端的控制部，此訊號隔離部 並用以電性隔離位於第一端的切換部及第二端的偵測部。 依據本發明之第三方面，一背光組件包含一切換部， 用以根據一控制訊號去切換一輸入電壓之開關以輸出一 *· _ 初級電壓；一電壓增強部，用以增強其第一端接收的初級 . 電壓以形成次級電壓於此電壓增強部之一第二端，其中， 此電壓增強部之第一端及第二端互為電性隔離的；複數個 燈管，以並聯相互連接；以及一平衡電路部，與電壓增強 • 部的第二端與此些燈管連接，以一致地提供由次級電壓產 生之一交流電至此些燈管，使該些燈管的亮度一致。 本發明所揭露的實施例其目標及優點，將可以立即的 表示出其技術，以下為本發明之實施例作一詳細的說明， 經由簡單的圖示說明完成最佳考慮的發明。當此了解時， 本發明仍有其實施例，以及在不同著眼點下的實施例變 型，其均無背離本發明。因此，後續的圖式及敘述從本發 明的本質上來敘述的，而並不因此而受限。 【實施方式】 ， 在後續的詳細的說明，為了要詳細的說明，而使實施 例有一通盤的了解，在之前已有許多特定的細節說明。這 很明顯的看出，此些實施例也許可無特殊的細節也可實 踐。在其他的例子中，已知的結構及設備則簡單的以圖表 式呈現。 第一實施例 OPS119-06-142-TW 9 1356362 第2圖為依據本發明第一實施例說明一背光組件的 電路圖。 如圖2所示，第一實施例的背光組件包含一切換部 214、一電壓增強部215、一平衡電路部220、一偵測部240、 .一控制部212以及一訊號隔離部213。在此實施例中，一 電源供應部及一換流器建構於一張板材上，由此，藉由切 換部214可直接從電源供應部的一功率因子校正線圈供給 於換流器的電壓增強部215直流電源。 此類的構造可幫助電路的設計及生產，以及使電源 的消耗減少。 如圖1所揭露的，其換流器的主要功能為執行控制固 定的電流，用以提供給分別的燈管，當之後的燈管放電 時，其燈管間的電流偏差可降至最低。 由於燈管點亮前具有高阻抗，所以點亮時需要高放電 的電壓。燈管放電後，其燈管的阻抗遠比尚未放電時小。 此外，每一隻燈管的阻抗均不盡相同，這是因為燈管的放 電、燈管内的電流感應、燈管間的電流偏差等原因。 因此，當具有低阻抗燈管的電流持續的增加，而低阻 抗燈管的阻抗會隨電流的增加而持續的下降，所以就會有 越來越多的電流流經低阻抗燈管。於是假設沒有控制供給 於每一燈管之電流總量，則某些燈管的亮度便會隨阻抗的 降低而持續的增加。結果其他的燈管亮度則會持續的減 少。另外，燈管點亮問題也會隨之產生。 假設此類的問題持續，則低阻抗燈管的壽命將會減少 〇PS119-〇6-142-TW 10 1356362 或者燈管被燒毁，這是因為此類的低阻抗燈管具有負阻抗 特性，而其電壓減少以及電流持續的增加的原因。 為了避免類似的情形，由多個平衡線圈220a所組成 • 之平衡電路部220係與電壓增強部215的一第二端連接。 ·· 然後，藉由第二端的電壓所產生的交流電可一致地供給多 個螢光燈管230，而且此些螢光燈管依照本實施例的佈 局。因此，藉由此些螢光燈管230產生一致性亮度的光來 增強此背光組件的發光特性。其中特別注意的是平衡線圈 • 220a跟普通線圈不同。尤其是，每一個具有電感的普通線 圈均具有單一輸出特性，但在此處的平衡線圈220a依照 本發明中的佈局，則包含了另一個可調整電流平衡的線 圈。因此，依照本發明中的這樣佈局的平衡線圈220a，基 本上會具有變壓器的特性以及結構。更加注意的是，平衡 電路部220並不一定需要包含平衡線圈220a，且平衡線圈 220a並不只是一結構單一的阻抗構件。更確切推斷平衡電 路部220此機構可用以在電流不平衡時維持平衡。舉例來 ® 說，依據線圈型式或維持平衡方法此平衡電路部220可以 其他型式實施，如Jin、Zaulus等。在本發明的範圍内也 包含一平衡電路部220使用電容器、電阻器以及主動元件 等元件。不管此平衡電路部220被安裝之方式為何，其基 '本功能仍為改善螢光燈管230之間因電流偏差所產生的電 流不平衡問題。 包含多個切換元件214a之切換部214對由控制部212 輸出的控制訊號有反應，以便從功率因子校正線圈去切換 OPS119-06-142-TW 11 1356362 開關來輸入直流電源’以及措由開關的控制切換直流電 源’以便轉換為具有固定頻率之電壓。依據另一實施例佈 局，其電壓為一方型波電壓。 其切換元件214a可使用雙载子接面電晶體（bip〇iar .· junction transistor，BJT)、場效電晶體（Field effect transistor,FET)等。 之後敘述將會把焦點放在以場效電晶體作為切換元 件214a上。然而，本發明的發明内容也可應用其他元件 • 做為切換元件214a。雖然，後續焦點著重於場效電晶體 上，但本發明的内容及範圍不受此限。 電壓增強部215至少包含一變壓器，用以接收經由第 一端以切換部214所轉換的方型波電壓，以便將方型波電 壓增強為第二端電壓。此外’藉由一諧振電路（未表示）， 電壓增強部215將已被增強的第二端電壓轉換為正弦波電 壓，以及提供被轉換的第二端正弦波電壓給此些螢光燈管 230。 春 在傳統的背光組件中，電源供應部110以及換流器 120是相互分開的，此電源供應部110中直流電/直流電變 流器113執行一絕緣功能來隔離從負載提供的電源。依據 本發明中第一實施例的佈局’電源供應部以及換流器建構 於一張板材上。因此，電壓增強部215執行一絕緣功能來 隔離第二端及第一端。而本發明的範圍仍包含將電源供應 部及換流器建構於不同的板材上，以提供電壓增強部215 的上述絕緣功能。 12According to a first aspect of the present invention, a backlight assembly includes a switching portion for enhancing a power (four) voltage according to a control signal such as a knife change-input money input to a voltage level booster. The primary electric power received by the ministry is intended to be electrically "strong" - the second end is formed - the secondary voltage, wherein the first end and the second end of the voltage boosting portion are electrically isolated from each other, and the feedback connection is used for Providing a control signal from the second end to the first end; and a signal isolation portion ′ is located in the feedback link for transmitting the control dragon to the secret part from the second end portion of the backhoe connection, and (4) changing the part and the feeding link The first end portion and the second end portion of the feedback connection are electrically isolated from the first end portion. According to the second aspect of the present invention, a backlight assembly includes a switching portion for Controlling the signal to switch - the DC voltage switch to output a primary voltage; a voltage boosting portion for enhancing the primary voltage received by the first end of the voltage boosting portion to form a primary voltage at the second end of the voltage boosting portion, Where the voltage is enhanced The first end and the second end are electrically isolated from each other; a plurality of lamps are connected in parallel to each other; a balance circuit portion is connected to the second end of the voltage boosting portion and the lamps so as to be evenly Providing an alternating current generated by the secondary voltage to the lamps to make the brightness of the lamps uniform; a detecting portion located at the second end of the voltage increasing portion for detecting at least the lamps a voltage and current to output a feedback signal to uniformly maintain the brightness of the lamps; a control unit for receiving a feedback signal from the detecting portion to output a control signal to control the switching portion; and a signal The isolation portion is configured to transmit a feedback OPS119-06-142-TW 8 Γ 356362 signal or a control signal to the control unit at the first end from the second end of the voltage boosting portion, and the signal isolation portion is electrically isolated at the first end According to a third aspect of the present invention, a backlight assembly includes a switching portion for switching an input voltage switch to output a primary voltage according to a control signal; a voltage increase a portion for enhancing a primary voltage received by the first end thereof to form a secondary voltage at a second end of the voltage boosting portion, wherein the first end and the second end of the voltage boosting portion are electrically isolated from each other a plurality of lamps connected in parallel to each other; and a balance circuit portion connected to the lamps at a second end of the voltage enhancement portion to uniformly supply an alternating current generated by the secondary voltage to the lamps The brightness of the lamps is made uniform. The objects and advantages of the embodiments disclosed in the present invention will be immediately described, and the following is a detailed description of the embodiments of the present invention, which is completed by simple illustration. Best regards of the invention. As will be apparent to this invention, the present invention is still in its embodiments, as well as the embodiment variants in the different aspects of the present invention, without departing from the invention. Thus, the following drawings and descriptions from the essence of the invention It is described above and is not limited by this. [Embodiment] In the following detailed description, for the sake of detailed explanation, there is a general understanding of the embodiment, and there have been many specific details. It will be apparent that these embodiments may be practiced without special details. In other examples, known structures and devices are simply presented graphically. First Embodiment OPS119-06-142-TW 9 1356362 Fig. 2 is a circuit diagram showing a backlight assembly in accordance with a first embodiment of the present invention. As shown in FIG. 2, the backlight assembly of the first embodiment includes a switching portion 214, a voltage enhancement portion 215, a balancing circuit portion 220, a detecting portion 240, a control portion 212, and a signal isolation portion 213. In this embodiment, a power supply unit and an inverter are constructed on a single plate, whereby the voltage applied to the inverter directly from a power factor correction coil of the power supply unit by the switching unit 214 is enhanced. Department 215 DC power supply. This type of construction can help with the design and production of the circuit and reduce the power consumption. As disclosed in Fig. 1, the main function of the inverter is to perform a controlled fixed current for supplying the respective lamps, and when the subsequent lamps are discharged, the current deviation between the lamps can be minimized. Since the lamp has a high impedance before lighting, a high discharge voltage is required for lighting. After the lamp is discharged, the impedance of the lamp is much smaller than when the lamp is not discharged. In addition, the impedance of each lamp is different, which is due to the discharge of the lamp, the current sensing in the lamp, and the current deviation between the lamps. Therefore, as the current with the low-impedance lamp continues to increase, and the impedance of the low-impedance lamp continues to decrease as the current increases, more and more current flows through the low-impedance lamp. Thus, assuming that the total amount of current supplied to each of the lamps is not controlled, the brightness of some of the lamps continues to increase as the impedance decreases. As a result, the brightness of other lamps will continue to decrease. In addition, the problem of lamp lighting will also occur. Assuming that such problems persist, the life of the low-impedance lamp will be reduced by 〇PS119-〇6-142-TW 10 1356362 or the lamp will be burnt because of the negative impedance characteristics of such low-impedance lamps. And its voltage is reduced and the current continues to increase. In order to avoid a similar situation, the balance circuit portion 220 composed of a plurality of balance coils 220a is connected to a second end of the voltage boosting portion 215. Then, the alternating current generated by the voltage at the second end can be uniformly supplied to the plurality of fluorescent tubes 230, and the fluorescent tubes are arranged in accordance with the present embodiment. Therefore, the light-emitting characteristics of the backlight assembly are enhanced by the light of the fluorescent tubes 230 to produce uniform brightness. Of particular note is the balance coil • 220a is different from the normal coil. In particular, each of the conventional coils having inductance has a single output characteristic, but the balance coil 220a herein includes another adjustable current balance coil in accordance with the layout of the present invention. Therefore, the balance coil 220a thus arranged in accordance with the present invention will basically have the characteristics and structure of the transformer. It is more noted that the balancing circuit portion 220 does not necessarily need to include the balancing coil 220a, and the balancing coil 220a is not just a single structural impedance member. More precisely, the balancing circuit portion 220 can be used to maintain balance during current imbalance. For example, the balance circuit unit 220 can be implemented in other types according to the coil type or the maintenance balance method, such as Jin, Zaulus, and the like. It is also within the scope of the present invention to include a balancing circuit portion 220 using components such as capacitors, resistors, and active components. Regardless of the manner in which the balancing circuit portion 220 is mounted, its function is to improve the current imbalance caused by current deviation between the fluorescent tubes 230. The switching unit 214 including the plurality of switching elements 214a is responsive to the control signal output by the control unit 212 to switch the OPS119-06-142-TW 11 1356362 switch from the power factor correction coil to input the DC power supply and the switch Control switching the DC power supply' to convert to a voltage with a fixed frequency. According to another embodiment, the voltage is a one-wave voltage. The switching element 214a can use a bipolar junction transistor (BJT), a field effect transistor (FET), or the like. The following description will focus on the field effect transistor as the switching element 214a. However, other elements of the invention may be applied as the switching element 214a. Although the subsequent focus is on the field effect transistor, the content and scope of the present invention are not limited thereto. The voltage boosting portion 215 includes at least a transformer for receiving the square wave voltage converted by the switching portion 214 via the first end to enhance the square wave voltage to the second terminal voltage. Further, by a resonant circuit (not shown), the voltage boosting portion 215 converts the enhanced second terminal voltage into a sinusoidal voltage, and provides the converted second-end sinusoidal voltage to the fluorescent tubes 230. . In the conventional backlight assembly, the power supply unit 110 and the inverter 120 are separated from each other, and the DC/DC converter 113 of the power supply unit 110 performs an insulation function to isolate the power supplied from the load. According to the layout of the first embodiment of the present invention, the power supply unit and the inverter are constructed on a single sheet. Therefore, the voltage boosting portion 215 performs an insulating function to isolate the second end and the first end. However, the scope of the present invention still includes constructing the power supply unit and the inverter on different boards to provide the above-described insulating function of the voltage boosting unit 215. 12
OPS119-06-142-TW Γ356362 電壓增強部215所提供的次級電壓為一正弦波第二 端電壓，且其於此些燈管230兩端之最大位準及最小位準 之差值是相等的，以及所提供的正弦波第二端電壓具有正 電壓位準及負電壓位準，其於此些螢光燈管230的兩端係 - 相同。此外，電壓增強部215藉由增強第二端電壓產生的 _ 交流電會經由平衡電路部220提供給每個螢光燈管230的 一端。而此些螢光燈管230的另一端為接地的。 此變壓器執行增強一脈寬調變方型波（PWM-shaped 鲁 square-wave)電壓功能，而其脈寬調頻方型波電壓會藉由 切換部214轉換為第二端電壓。只需使用一至二個變壓 器。然而在此實施例中，只使用一個變壓器。在此特殊的 佈局中，脈寬調變用以控制換流器的輸出以及螢光燈管 230的亮度。然而，也不排除其他亮度控制之方法。 在此實施例中，此些燈管230以並聯的方式相互連接 而可以一變壓器驅動。因此，可以減少整體大量的電路， 以及增加提供電源給背光組件驅動之效率。 ® 可以藉由一個變壓器去驅動以並聯方式連接的螢光 燈管230之原因就在於使用平衡電路部220持續地控制每 一燈管内的電流。 位於電壓增強部215的第二端内之偵測部240會偵侧 '數個螢光燈管230内的電壓或電流，以便輸出反饋訊息來 維持亮度的一致。此外，偵測部240從數個螢光燈管230 偵側到至少一異常狀態，便輸出一斷線訊號使電路中斷。 在此實施例之佈局中，偵測部240包含一個或更多電流以 OPS119-06-142-TW 13 Γ356362 相互隔離 該原因如下。一家庭使用電子產品之第一端部分會形 成一迴路，以及電子產品之第二端部分會予人所操作且在 各產品中係獨立形成。因此，假使第一端及第二端的接地 - 部分並不是相互分開的，在一產品中發生的問題（如電磁 . 干擾、功率因子、電壓突波以及類似的情形）會被導引到 鄰近的電子產品上，此外，因為第二端電源是由人所操作 的，也可能發生如電震以及類似的安全問題。 • 為了避免此類的問題，依據第一實施例此背光組件包 含訊號隔離部213，其不僅可從控制部212輸出一控制訊 號至切換部214，也可以隔離位於第二端的控制部212及 位於第一端的切換部214。 訊號隔離部213可由一光耦合器或變壓器所組成。 為了改善包含於切換部214内多數的場效電晶體的 驅動效能，依據第一實施例，背光組件可包含切換元件驅 動部216，其中切換元件驅動部216可增強從訊號隔離部 ® 213輸出之控制訊號，以及輸出此已增強的控制訊號至切 換部214之多個場效電晶體214a。 第二實施例 第3圖為根據本發明第二實施例說明一背光組件的 電路圖。 如圖3所示，背光組件包含一部切換部314、一電壓 OPS119-06-142-TW 15 1356362 增強部315、一平衡電路部320、一偵測部340、一控制部 312以及一訊號隔離部313。在此實施例中，電源提供部 以及換流器建構於同一張板材上，以及因此，電源供應部 的功率因子校正線圈之直流電源直接經由切換部314供給 於電壓增強部315的換流器。 而此類構造可幫助電路的設計及生產，且可使電源的 消耗減少。 與第一實施例相似，由多個平衡線圈320a所組成的 • 平衡電路部320是與電壓增強部315的第二端連接，以控 制與燈管特性相關之燈管電流。於是，藉由第二端的電壓 產生之交流電流可均勻地提供給多個螢光燈管330。因 此，由多個螢光燈管330產生之一致性亮度來增強背光組 件的發光特性。 包含多個切換元件314a之切換部314對由控制部312 輸出的控制訊號有反應，以便從功率因子校正線圈去切換 開關來輸入直流電源，以及藉由開關的控制切換直流電 ® 源，以便轉換為具有固定頻率之電壓。依照此實施例的佈 局，此處的電壓為一方型波電壓。 其切換元件314a可使用雙載子接面電晶體、場效電 晶體等。 ' 之後敘述將會把焦點放在以場效電晶體作為切換元 件314a上。然而，本發明的發明内容也可應用其他元件 做為切換元件314a。雖然，後續焦點著重於場效電晶體 上，但本發明的内容與範圍不受此所限。 OPS119-06-142-TW 16 Γ356362 電壓增強部315至至包含一變壓器，用以接收經由第 一端以切換部314所轉換的方型波電壓，且此方型波電壓 為，以便將方型波電壓增強為第二端電壓。此外，藉由一 • 諧振電路（未表示），電壓增強部315將已被增強的第二端 - 電壓轉換為正弦波電壓，以及提供被轉換的第二端正弦波 電壓給此些螢光燈管330。 . 在傳統的背光組件中，電源供應部110和換流器120 是相互分開，電源供應部110的直流電/直流電變流器113 • 執行一隔離功能來隔離從負載提供的電源。依據本發明中 第二實施例的佈局，電源供應部與及換流器是建構於一張 板材上。因此，電壓增強部315執行一絕緣功能來隔離第 一端及第二端。而本發明的範圍内仍包含將電源供應部與 換流器建構於不同板材上，以提供電壓增強部315完成上 述的隔離功能。 電壓增強部315所提供的次級電壓為一正弦波第二 端電壓，且其於此些燈管330兩端之最大位準及最小位準 ® 之差值是相等的，以及所提供的正弦波第二端電壓具有正 電壓位準及負電壓位準，且於此些螢光燈管330的兩端係 _ 相同。此外，電壓增強部315藉由增強第二端電壓產生的 交流電會經由平衡電路部320提供給每個螢光燈管330的 每一端。而此些螢光燈管330的另一端為接地的。 此變壓器執行增強一脈寬調變方型波電壓功能，而其 脈寬調變方型波電壓會藉由切換部314轉換為第二端電 壓。只需使用一至兩個變壓器。然而在此實施例中，只使 OPS119-06-142-TW 17 Γ356362 用一個變壓器。 在此實施例中，此些燈管330以並聯的方式相互連接 而可以一變壓器驅動。因此，可以減少整體大量電路，以 ' 及增加提供電源給背光組件驅動之效率。。 -_ 可以藉由一個變壓器去驅動相互以並聯方式連接的 _ 螢光燈管330之原因就在於使用平衡電路部320持續地控 制每一燈管内的電流。 位於電壓增強部315的第二端内之偵測部240會偵測 • 此些螢光燈管330内的電壓或電流，以便輸出反饋訊號來 維持一致的亮度。此外，偵測部340從數個螢光燈管330 偵測到至少一個異常狀態，便輸出一斷線訊號使電路中 斷。在此實施例裡的佈局，偵測部340包含一個或多個電 流及（或）電壓偵測器。其他的偵測區間340的佈局，亦不 排除。 偵測部340可以與電壓增強部315的第二級輸出級或 者平衡電路部320的輸出級相連。 ® 控制部312與第一實施例的控制部212的相異為座落 於電壓增強部315的變壓器之第一端，以及從偵測區間340 接收一反饋訊號以及（或者）電路中斷訊號以便輸出一操 縱訊號來控制切換部314。 ' 如上所述，直流電/直流電變流器，在傳統的背光組 件可做為隔離從負載的電源供應，而在此處是被去除的。 因此，電壓增強部315之第一端及第二端的接地部分則需 彼此相互分離，這與第一實施例相似。 OPS119-06-142-TW 18 1356362 、該原因如下。一家庭使用電子產品之第一端部分會形 成一迴圈，以及電子產品之第二端部分會予人所操作且在 各產品中係獨立形成。因此，假使第一端及第二端的接地 部分並不是相互分開的，在一產品中發生的問題（如電磁 干擾、功率因子、電壓突波以及類似的情形）會被導引到 鄰近的電子產品上，此外，因為第二端電源是由人所操作 的，也可旎發生如電震以及類似的安全問題 為了避免此類問題，依據第二實施例的背光組件包含 訊號隔離部313，其不僅可從伯測部34〇輸出一反饋訊^ 以及（或者）電路中斷訊號至控制部312，以及同時隔離位u 於第一鈿的偵測部340和位於第一端的控制部312。 訊號隔離部313也可由-光搞接器或一變壓器所組 成。訊號隔離部313也可輸出-開/關訊號以及（或者）模 糊訊说（由外部所提供的，用來控制燈的亮度）至第一端的 控制312。依照此實施例替代的佈局方式，該開/關訊號及 (或）模糊sfl號可以直接的方式給予控制部312。 既然控制部312可以類比的方式輸出控制訊號，即必 包含一數位/類比轉換器(未標示），而可使從訊號隔離部 313在訊號輸出源的脈寬調變的模糊訊號轉換為一類比訊 號。在控制裝置部212的其他佈局所輸出的訊號，若為數 位訊號或為數位與類比合併的訊號，則亦不排除。。 為了促進包含於切換部314内多個場效電晶體3丨“ 的驅動效能’依據第二實施例之背光組件包含—切換元件 驅動部316 ’用以增強從控制部312的控制訊號輪出源以The secondary voltage provided by the voltage boosting unit 215 is a sinusoidal second terminal voltage, and the difference between the maximum level and the minimum level of the two ends of the lamp tube 230 is equal. And the provided second sinusoidal voltage has a positive voltage level and a negative voltage level, which are the same at both ends of the fluorescent tube 230. Further, the _ alternating current generated by the voltage boosting portion 215 by enhancing the second terminal voltage is supplied to one end of each of the fluorescent tubes 230 via the balancing circuit portion 220. The other ends of the fluorescent tubes 230 are grounded. The transformer performs a PWM-shaped square-wave voltage function, and its pulse width modulated square wave voltage is converted to a second terminal voltage by the switching portion 214. Just use one or two transformers. In this embodiment, however, only one transformer is used. In this particular layout, the pulse width modulation is used to control the output of the inverter and the brightness of the fluorescent tube 230. However, other methods of brightness control are not excluded. In this embodiment, the lamps 230 are connected to each other in parallel and can be driven by a transformer. Therefore, it is possible to reduce the overall large number of circuits and increase the efficiency of supplying power to the backlight assembly. The reason why the fluorescent tubes 230 connected in parallel can be driven by a transformer is to continuously control the current in each of the lamps using the balancing circuit portion 220. The detecting portion 240 located in the second end of the voltage amplifying portion 215 detects the voltage or current in the plurality of fluorescent tubes 230 to output a feedback message to maintain the brightness uniformity. In addition, the detecting unit 240 detects from the plurality of fluorescent tubes 230 to at least one abnormal state, and outputs a disconnection signal to interrupt the circuit. In the layout of this embodiment, the detecting portion 240 contains one or more currents isolated from each other by OPS119-06-142-TW 13 Γ 356362 for the following reasons. The first end of a household using electronic products forms a loop, and the second end of the electronic product is operated by humans and formed independently in each product. Therefore, if the ground-portions of the first and second ends are not separated from each other, problems occurring in a product (such as electromagnetic interference, power factor, voltage surge, and the like) are directed to adjacent ones. In electronics, in addition, because the second-end power supply is operated by humans, such as electric shock and similar safety issues may occur. In order to avoid such a problem, the backlight assembly includes a signal isolation portion 213 according to the first embodiment, which can not only output a control signal from the control portion 212 to the switching portion 214, but also isolate the control portion 212 located at the second end. The switching unit 214 at the first end. The signal isolation portion 213 may be composed of an optical coupler or a transformer. In order to improve the driving performance of a plurality of field effect transistors included in the switching portion 214, according to the first embodiment, the backlight assembly may include a switching element driving portion 216, wherein the switching element driving portion 216 may enhance the output from the signal isolation portion 213 The control signal is output, and the enhanced control signal is output to the plurality of field effect transistors 214a of the switching portion 214. SECOND EMBODIMENT Fig. 3 is a circuit diagram showing a backlight assembly in accordance with a second embodiment of the present invention. As shown in FIG. 3, the backlight assembly includes a switching portion 314, a voltage OPS119-06-142-TW 15 1356362 enhancement portion 315, a balancing circuit portion 320, a detecting portion 340, a control portion 312, and a signal isolation. Part 313. In this embodiment, the power supply unit and the inverter are constructed on the same sheet, and therefore, the DC power of the power factor correction coil of the power supply unit is directly supplied to the inverter of the voltage boosting unit 315 via the switching unit 314. Such a configuration can help design and manufacture the circuit and reduce power consumption. Similar to the first embodiment, the balancing circuit portion 320 composed of a plurality of balancing coils 320a is connected to the second end of the voltage boosting portion 315 to control the lamp current associated with the lamp characteristics. Thus, the alternating current generated by the voltage at the second end can be uniformly supplied to the plurality of fluorescent tubes 330. Therefore, the uniform brightness produced by the plurality of fluorescent tubes 330 enhances the illumination characteristics of the backlight assembly. The switching unit 314 including the plurality of switching elements 314a is responsive to the control signal outputted by the control unit 312 to switch the switch from the power factor correction coil to input the DC power source, and to switch the DC power source by the control of the switch to be converted into A voltage with a fixed frequency. According to the layout of this embodiment, the voltage here is a one-wave type voltage. The switching element 314a can use a bipolar junction transistor, a field effect transistor, or the like. The following description will focus on the field effect transistor as the switching element 314a. However, other aspects of the invention may be applied to the switching element 314a. Although the subsequent focus is on the field effect transistor, the content and scope of the present invention are not limited thereto. The OPS119-06-142-TW 16 Γ356362 voltage boosting section 315 includes a transformer for receiving the square wave voltage converted by the switching section 314 via the first end, and the square wave voltage is such that the square type is The wave voltage is boosted to the second terminal voltage. In addition, the voltage boosting unit 315 converts the enhanced second terminal-voltage into a sine wave voltage and provides the converted second-end sine wave voltage to the fluorescent lamps by a resonant circuit (not shown). Tube 330. In the conventional backlight assembly, the power supply portion 110 and the inverter 120 are separated from each other, and the DC/DC current converter 113 of the power supply portion 110 performs an isolation function to isolate the power supplied from the load. According to the layout of the second embodiment of the present invention, the power supply unit and the inverter are constructed on a single sheet. Therefore, the voltage boosting portion 315 performs an insulating function to isolate the first end and the second end. However, the scope of the present invention still includes constructing the power supply portion and the inverter on different plates to provide the voltage enhancement portion 315 for performing the above-described isolation function. The secondary voltage provided by the voltage boosting unit 315 is a sinusoidal second terminal voltage, and the difference between the maximum level and the minimum level of the lamps 330 is equal, and the provided sine is provided. The second terminal voltage of the wave has a positive voltage level and a negative voltage level, and the ends of the fluorescent tubes 330 are _ the same. Further, the alternating current generated by the voltage boosting portion 315 by enhancing the second terminal voltage is supplied to each end of each of the fluorescent tubes 330 via the balancing circuit portion 320. The other ends of the fluorescent tubes 330 are grounded. The transformer performs an enhancement of a pulse width modulation square wave voltage function, and its pulse width modulation square wave voltage is converted to a second terminal voltage by the switching portion 314. Just use one or two transformers. In this embodiment, however, only one transformer is used for the OPS119-06-142-TW 17 Γ356362. In this embodiment, the lamps 330 are connected to each other in parallel and can be driven by a transformer. Therefore, it is possible to reduce the overall number of circuits to 'and increase the efficiency of supplying power to the backlight assembly. . The reason why the _ fluorescent tube 330 which can be connected to each other in parallel by a transformer is that the balance circuit portion 320 is used to continuously control the current in each of the lamps. The detecting portion 240 located in the second end of the voltage enhancing portion 315 detects the voltage or current in the fluorescent tubes 330 to output a feedback signal to maintain a uniform brightness. In addition, the detecting unit 340 detects at least one abnormal state from the plurality of fluorescent tubes 330, and outputs a disconnection signal to interrupt the circuit. In the layout of this embodiment, the detecting portion 340 includes one or more current and/or voltage detectors. The layout of other detection intervals 340 is not excluded. The detecting section 340 may be connected to the second stage output stage of the voltage boosting section 315 or the output stage of the balancing circuit section 320. The control unit 312 is different from the control unit 212 of the first embodiment in that it is located at the first end of the transformer of the voltage boosting unit 315, and receives a feedback signal and/or a circuit interrupt signal from the detecting section 340 for output. A steering signal is used to control the switching portion 314. As mentioned above, DC/DC converters can be used as isolation power supplies from the conventional backlight assembly and are removed here. Therefore, the ground portions of the first end and the second end of the voltage boosting portion 315 need to be separated from each other, which is similar to the first embodiment. OPS119-06-142-TW 18 1356362, the reason is as follows. The first end of a household using electronic products forms a loop, and the second end of the electronic product is manipulated and formed independently in each product. Therefore, if the grounded portions of the first end and the second end are not separated from each other, problems occurring in a product (such as electromagnetic interference, power factor, voltage surge, and the like) are directed to adjacent electronic products. In addition, because the second-end power source is operated by a person, such as electric shock and similar safety problems may occur, in order to avoid such problems, the backlight assembly according to the second embodiment includes a signal isolation portion 313, which not only A feedback signal and/or a circuit interrupt signal may be output from the detection unit 34A to the control unit 312, and the detection unit 340 of the first port and the control unit 312 at the first end are simultaneously isolated. The signal isolation portion 313 can also be composed of a photo splicer or a transformer. The signal isolation portion 313 can also output an on/off signal and/or a smudge command (provided by the outside to control the brightness of the lamp) to the first end of the control 312. According to the layout mode instead of this embodiment, the on/off signal and/or the fuzzy sfl number can be given to the control unit 312 in a straightforward manner. Since the control unit 312 can output the control signal in an analogous manner, that is, a digital/analog converter (not shown) must be included, and the fuzzy signal modulated from the signal isolation source 313 at the pulse width of the signal output source can be converted into an analogy. Signal. The signals outputted by other layouts of the control unit 212 are not excluded if they are digital signals or signals that are combined with analog and analog. . In order to facilitate the driving performance of the plurality of field effect transistors 3 included in the switching portion 314, the backlight assembly according to the second embodiment includes a switching element driving portion 316' for enhancing the output of the control signal wheel from the control portion 312. Take
OPS119-06-142-TW 19 1356362 及輸出已增強的控制訊號至切換部314之多個場效電晶體 314a 0 依據本發明已揭露的實施例之背光組件的佈局，電源 供應部與換流器為建構在一板材上。因此，電路設計與生 產變得容易且降低電源的消耗。 此外，當本發明中被揭露之實施例中，平衡線圈在進 一步的背光組佈局中使用，而可有效的增強背光組件的發 光特性。 • 另外，在本發明中被揭露之實施例中背来+ 的佈局，複數個螢光燈光以並聯的方式相互連接可藉由二 個變壓器即可驅動，而這即可有效的減少整體大量=電路 以及增強驅動背光組件的電源供應效能。 再者，如果電源供應部及換流器建構於一張板材上， 則有隔離電源供應與負荷的需求。不過，則可使用光耦合 器或變壓器的訊號隔離部，一個簡單構件來滿足此需求: 但需與本發明中被揭露之實施例與進一步佈局一致。 鲁雖然只有幾個實施例於一般的發明内^中表示及敘 述，本發明所屬技術領域中具有通常知識者，在離本 發明之精神和範圍内，當可作各種之更動與潤傳。因此， 本發明之保護範圍當視後附之㈣專利範圍所界定者為 準。OPS119-06-142-TW 19 1356362 and outputting the enhanced control signal to the plurality of field effect transistors 314a of the switching portion 314. The layout of the backlight assembly according to the disclosed embodiment of the present invention, the power supply portion and the inverter For construction on a plate. Therefore, circuit design and production become easy and power consumption is reduced. Moreover, in the embodiment disclosed in the present invention, the balance coil is used in a further backlight group layout, and the light-emitting characteristics of the backlight assembly can be effectively enhanced. In addition, in the embodiment disclosed in the present invention, the layout of the +, a plurality of fluorescent lights connected in parallel can be driven by two transformers, and this can effectively reduce the overall amount = The power supply performance of the circuit and the enhanced drive backlight assembly. Furthermore, if the power supply unit and the inverter are constructed on a single sheet, there is a need to isolate the power supply and load. However, an optical coupler or signal isolation portion of the transformer can be used, a simple component to meet this need: but consistent with the disclosed embodiment and further layout of the present invention. Although only a few embodiments are shown and described in the general invention, those skilled in the art will be able to make various changes and modifications within the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is subject to the definition of (4) the scope of the patent attached.
OPS119-06-142-TW 20 【圖式簡單說明】 為了全盤的了解本發明所揭露的實施例本質的目的， 圖1為一傳統之背光組件示意圖。 圖2為根據本發明第一實施例說明一背光組 路圖。 圖3為根據本發明說明第二實施例一背光組件的番 路圖。 电 【主要元件符號說明】 100 :背光組件 U0 :電源供應部 111 :整流部 112 :功率因子校正線圈 113 :直流電/直流電變流器 120 :換流器 121 :控制器 122 :變壓器 130 :燈管單元 212、 312 :控制部 213、 313 :訊號隔離部 214、 314 :切換部 214a、314a ;切換元件 215、 315 :電壓增強部 216、 316 :切換元件驅動部 OPS119-06-142-TW 21 1356362OPS119-06-142-TW 20 [Simple Description of the Drawings] In order to fully understand the essentials of the embodiments of the present invention, FIG. 1 is a schematic diagram of a conventional backlight assembly. Fig. 2 is a block diagram showing a backlight according to a first embodiment of the present invention. Figure 3 is a perspective view of a backlight assembly in accordance with a second embodiment of the present invention. [Main component symbol description] 100: backlight unit U0: power supply unit 111: rectification unit 112: power factor correction coil 113: DC/DC converter 120: inverter 121: controller 122: transformer 130: tube Units 212, 312: control units 213, 313: signal isolation units 214, 314: switching units 214a, 314a; switching elements 215, 315: voltage enhancement unit 216, 316: switching element drive unit OPS119-06-142-TW 21 1356362
220、320 :平衡電路部 220a、320a :平衡線圈 230、330 :螢光燈管 240、340 :偵測部 OPS119-06-142-TW 22220, 320: balance circuit unit 220a, 320a: balance coil 230, 330: fluorescent tube 240, 340: detection unit OPS119-06-142-TW 22