M439316 五、新型說明： 【新型所屬之技術領域】 本創作是有關於-種發光二極體的驅動電路，尤指一麵用串 ^方式連接發光二極料元的複數個發光二極體燈條，使得流經發 光二極體單元的複數個發光二減燈條的電流相同的發光二極體^ 驅動電路。 【先前技術】 、—在現有技射，液晶電視或是液晶監視器的背光模組通常具有 複數個發光二極體燈條。因此，液晶電視或是液晶監視器的背光模 ，即可根據複數個發光二極體燈條的開啟與關閉，控制液晶電視或 是液晶監視H㈣光。因為液晶電視或是液晶監視器的背光模板且 有複數個發光二極體燈條，所以發光二極體的驅動電路必須有搞接 於複數個發光二極體燈條的相對應的複數個開關，以控制每一發光 二極體燈條的開啟與關閉。如此，現雜術將有下列缺點：第:、 因為每-發光二極體燈條都有—相對應的開關，所以發光二極體的 驅動電路具有高成本减造耗時；第二、縣每—發光二極體燈條 都有-相對應的開關，所以流經複數個發光二極體燈條的電流之間, 可能具有誤差’導致液晶電視或是液晶監視_背光不易控制；第 二、因為母—發光二極舰條都有—相對應的開關，所以發光二極 體的驅動電路输能^ @此，對於液晶電視或是液晶監視器的背光 模組而言，現紐躺發光二極體雜動電路料是-個好的發光 M439316 二極體的驅動電路。 【新型内容】 本創作的-實施例提供-種發光二極體的驅動電 路包含-功率轉換H與—發光 … 祕動電 收-直流電壓，並升壓該直流電壓 。。疋用以接 二第—開關一二極體及-控制電路。該 第-電谷八有1-端’用以接收該直流電壓，及—第二端，用以 祕於一地端；該線圈具有一第-端，麵接於該第-電容的第-端’ 及-第-端，該第-開關具有—第—端，槠於該線圈的第二端， 一第一端，及一弟三端；該二極體且右座山 H第-端’耦接於該線圈的 第 4一％，用以輸出該輪出電壓；該控制電路罝有一第 -端’祕於該第-開關的第二端，用以根據流經該第—開關的一 電流，產生-控制訊號，以控制該第的開啟與關， 端，·用以偵測該電流厂第三端，及—第四端，用以輸出一調轨 號，該發光一極體單元是耦接該輸出電壓。 本創作提供—種發光二極體的驅動電路。該驅動電路是利用— -轉板或-印刷電路板以-串聯方式連接一發光二極體單元的複數個 發光二極條。因此，流魄發光二極鮮元的複數個發光二極 體燈條的電齡_。料，該鶴電路_—控制電路可根據流 經-第-開關的電流’產生—過電流保護，以及根據—分屋電路^ 產生的第-電壓，產生-過電壓保護。因此，本創作具有下列優點： M439316 第一、因為該複數個發光二極體燈條是以該串聯方式連接，所以該 複數個發光二極體燈條只對應一個第二開關，導致該驅動電路的成 本可被降低且製造簡單；第二、因為流經該發光二極體單元的該複 數個發光二極體燈條的電流相同，所以該複數個發光二極體燈條内 的母發光一極體的壳度相同；第三、因為該複數個發光二極體燈 •條僅有一相對應的第二開關，所以該發光二極體的驅動電路較節 •能；第四、因為該複數個發光二極體燈條僅有一相對應的第二開關， 鲁所以易於標準化該發光二極體的驅動電路。 【實施方式】 請參照第1圖，第1圖是為本創作的一實施例說明一種發光二 極體的驅動電路1〇〇的示意圖。驅動電路1〇〇包含一功率轉換器102 與一發光二極體單元104，其中功率轉換器1〇2是用以接收一直流 電壓VDC，並升壓直流電壓vdc為一輸出電壓ν〇υτ。如第】圖 所示，功率轉換器1〇2包含一第一電容1〇22、一線圈1024、一第一 開關1026、一感測電阻1028、一控制電路1〇3〇、一二極體1〇32及 一第二電容1034。第一電容1022具有一第一端，用以接收直流電 t VDC ’及一第一端，用以搞接於一地端GND，其中第一電容1022 疋用以穩定直流電壓VDC。線圈1〇24具有一第一端，麵接於第一 電容1022的第一端，及一第二端。第一開關1〇26具有一第一端， 耦接於線圈1024的第二端，一第二端，及一第三端。感測電阻1〇28 具有一第一端，耦接於第一開關1026的第三端，及一第二端，耦接 於地端GND ’其中感測電阻208係用以感測流經第一開關1〇26的 M439316 —電流ID。控制電路1030具有一第一端，耦接於第一開關1〇26的 第二端，用以根據流經第一開關206的電流辽）所產生的一感測電壓 vs，產生一控制訊號cs，以控制第一開關1026的開啟與關閉，一 第一端，用以偵測電流ID，一第三端，及一第四端，用以輸出一調 光訊號DS ’其中控制電路1030的型號係可為ld 7889，且控制訊 號CS是為一包含一導通時間與一截止時間的脈衝寬度調變訊號。 二極體1032具有一第一端，耦接於線圈1024的第二端，及一第二 端’用以輸出輸出電壓VOUT至發光二極體單元1〇4的第一端。一 第一電谷1034具有一第一端，麵接於二極體1032的第二端，及一 第二端，耦接於地端GND。 如第1圖所示，其中功率轉換器102另包含一整流器1〇36、一 刀壓電路1038和一第二開關1〇39。整流器1036具有一第一端，搞 接於父流電源SAC的正端，用以接收一交流電壓vac，一第二 端，耦接於第一電容1〇22的第一端，用以輸出直流電壓vdc , 一 第三端，耦接於交流電源SAC的負端，及一第四端，耦接於地端 GND。分壓電路1038具有一第一端’耦接於二極體1〇32的第二端， 第一知，用以根據輸出電壓VOUT，輸出一第一電壓至控制 電路1030的第三端’及一苐三端，耦接於地端GND;第二開關1的9 具有一第一端，耦接於發光二極體單元1〇4的第二端，一第二端， 減於控制電路1030的第四端，用以接吹調光訊號DS，及—第三 端，輕接於地端GND。因為調光訊號Ds是可為一脈衝寬度調變訊 號、-高電位訊號或-低電位訊號，所以第二開關顧即可根據調 M439316 光訊號DS，控制發光二極體單元1〇4的亮度，亦即第二開關1039 可根據調光訊號DS，調整流經發光二極體單元1〇4的電流ILED， 以控制發光二極體單元104的亮度。另外，發光二極體單元1〇4是 以複數個發光二極體燈條(例如5個發光二極體燈條EL1-IL5)串聯而 成’所以流經5個發光二極體燈條IL1_IL5的電流是等於電流 :ILED。如此，5個發光二極體燈條ILi_iL5中的每一發光二極體的 亮度會相同。但本發明並不受限於發光二極體單元1〇4包含5個發， 餐光二極體燈條IL1-IL5。另外，發光二極體單元1〇4是為一直下式發 光二極體單元，亦即發光二極體單元104是設置於一液晶面板的下 方，以及發光二極體單元104是朝上發射光線。另外，5個發光二 極體燈條IL1-IL5的每一發光二極體燈條的跨壓是高於3〇v，且5 個發光二極體燈條IL1-IL5是透過一轉板1〇42以串聯方式連接。在 本發明的另一實施例中’ 5個發光二極體燈條ι〇_ΙΙ5是透過一印刷 電路板1042以串聯方式連接。 如第1圖所示’整流器1036是用以整流交流電壓vac，以產 生及輸出直流電壓VDC至線圈1024。線圈1〇24、第一開關1〇26 和二極體1032是用以升壓直流電壓VDC成為輸出電壓ν〇υτ，其 中輸出電壓VOUT是用以驅動發光二極體單元104。當第一開關 1026根據控制訊號CS開啟時，線圈1024係用以儲存直流電壓 所傳遞的電能’以及第二電容1034係用以釋出第二電容1〇34所儲 存的電能，以驅動發光二極體單元104。亦即當第—開關根據 控制訊號CS開啟時，因為二極體1032是為關閉，所以直流電壓 9 VOTFT斤^的電成是錯存在線圈】G24 ’而不是傳送至輸出電磨 VOUT。如第 1 阁 _ , ^ 不’备第一開關1026根據控制訊號CS關閉時， 係用M釋出所健存的電能’以同時驅動發光二極體單元 I納拉一電容1〇34充電。亦即當第一開關1026根據控制訊號 At因為—極體1032是為開啟，所以線圈1024可根據所儲 子的電H時軸發光二極體單元1G4及對第二電容刪充電。 田電/瓜1D大於—電流預定值時，控制電路1030可產生一過 電流保護；當第_雷厭V·! 1大於一電藶預定值時，控制電路〗〇3〇可 產生一過電壓保護。 π上所述’本創作所提供的發光二極翻驅動電路是利用轉板 或Ρ刷電路板w串聯方式連接發光二極體單元的複數個發光二極體 ^條因此趣發光二極體單元的複數個發光二極體燈條的電流 職调卿—關的電流， 產生過m以及㈣分壓電路所產生的第—電壓，產生過電 壓保護。因此，本創作具有下列優點：第―、因為複數個發光二極 式連接’所以複數個發光二極體燈條只對應一個 弟-開關’導致驅動電路的成本可被降低且製造簡單；第二、因為 流輕發光二極體單元的複數個發光二極體燈條的電流相同，所以複 數個發光二_燈條内的每—發光二極體的亮度相同；第三、因為 複數個發光二極體燈條僅有一相對應的第二開關，所以發光二極體 的驅動電路較節能；第四、因為複數個發光二極體燈條僅有一相對 應的第二開關’所以易於標準化發光二極體的驅動電路。 M439316 以上所述僅為本創作之較佳實施例，凡依本創作申請專利範圍 所做之均等變化與修飾，皆應屬本創作之涵蓋範圍。 【圖式簡單說明】 第1圖是為本創作的一實施例說明一種發光二極體的驅動電路的示 意圖。 •【主要元件符號說明】 100 驅動電路 102 功率轉換器 104 發光二極體單元 1022 第一電容 1024 線圈 1026 第一開關 1028 感測電阻 1030 控制電路 1032 二極體 1034 第二電容 1036 整流器 1038 分壓電路 ' 1039 第二開關 1042 轉板 11 M439316 cs 控制訊號 DS 調光訊號 GND 地端 ID > ILED 電流 IL1-IL5 發光二極體燈條 SAC 交流電源 VI 第一電壓 VAC 交流電壓 VDC 直流電壓 VOUT 輸出電壓 vs 感測電壓 12M439316 V. New Description: [New Technology Field] This creation is about a kind of driving circuit for a kind of light-emitting diode, especially a plurality of light-emitting diode lamps connected with a light-emitting diode material by a series of ways. The strips are such that the plurality of light-emitting diode strips flowing through the light-emitting diode unit have the same current-emitting diode driving circuit. [Prior Art] - In the prior art, a backlight module of a liquid crystal television or a liquid crystal monitor usually has a plurality of light-emitting diode strips. Therefore, the backlight mode of the liquid crystal television or the liquid crystal monitor can control the liquid crystal television or the liquid crystal to monitor the H (four) light according to the opening and closing of the plurality of light emitting diode strips. Because the backlight of the LCD TV or the LCD monitor has a plurality of LED strips, the driving circuit of the LED must have a corresponding plurality of switches connected to the plurality of LED strips. To control the opening and closing of each LED strip. Thus, the current miscellaneous techniques will have the following disadvantages: No.: Because each-light-emitting diode strip has a corresponding switch, the driving circuit of the LED has high cost and reduced manufacturing time; Each light-emitting diode light bar has a corresponding switch, so there may be an error between the currents flowing through the plurality of light-emitting diode light strips, resulting in LCD TV or liquid crystal monitoring _ backlight is difficult to control; second Because the mother-light-emitting two-pole ship has a corresponding switch, the driving circuit of the light-emitting diode is capable of transmitting power. For this, for the backlight module of the LCD TV or the liquid crystal monitor, the new-lying light is emitted. The diode body circuit is a good driving circuit for the light-emitting M439316 diode. [New Content] The present invention provides a driving circuit for a light-emitting diode comprising - power conversion H and - illuminating - DC voltage, and boosting the DC voltage. .疋 is used to connect the second-switch-diode and the control circuit. The first-electric valley eight has a 1-terminal 'for receiving the DC voltage, and - a second end for secreting a ground end; the coil has a first end, which is connected to the first portion of the first capacitor The end 'and the first end, the first switch has a first end, a second end of the coil, a first end, and a third end; the diode and the right side of the H-end 'coupled to the 4th% of the coil for outputting the wheel-out voltage; the control circuit has a first end-end to the second end of the first switch for passing through the first switch a current, generating a control signal to control the opening and closing of the first end, wherein the third end of the current factory is detected, and the fourth end is configured to output a tuning number, the light emitting body The unit is coupled to the output voltage. This creation provides a driving circuit for a light-emitting diode. The driving circuit is a plurality of light emitting diode strips connected to one light emitting diode unit in a series manner by using - a rotating plate or a printed circuit board. Therefore, the age of the plurality of light-emitting diode strips of the flowing light-emitting diode is _. The hoist circuit _- control circuit can generate over-current protection according to the current flowing through the - switch, and generate - over-voltage protection according to the first voltage generated by the split-unit circuit ^. Therefore, the present invention has the following advantages: M439316 First, because the plurality of LED strips are connected in series, the plurality of LED strips correspond to only one second switch, resulting in the driving circuit. The cost can be reduced and the manufacturing is simple; secondly, since the currents of the plurality of light-emitting diode strips flowing through the light-emitting diode unit are the same, the mother light-emitting light in the plurality of light-emitting diode strips The polar body has the same shell degree; thirdly, because the plurality of light-emitting diode lamps and strips have only one corresponding second switch, the driving circuit of the light-emitting diode is more capable; fourth, because the plural The light-emitting diode light bar has only one corresponding second switch, so it is easy to standardize the driving circuit of the light-emitting diode. [Embodiment] Please refer to Fig. 1. Fig. 1 is a schematic view showing a driving circuit 1 of a light-emitting diode according to an embodiment of the present invention. The driving circuit 1A includes a power converter 102 and a light emitting diode unit 104, wherein the power converter 1〇2 is for receiving the DC voltage VDC, and the boosting DC voltage vdc is an output voltage ν〇υτ. As shown in the figure, the power converter 1〇2 includes a first capacitor 1〇22, a coil 1024, a first switch 1026, a sensing resistor 1028, a control circuit 1〇3〇, and a diode. 1〇32 and a second capacitor 1034. The first capacitor 1022 has a first end for receiving the DC power t VDC ’ and a first end for engaging with a ground GND, wherein the first capacitor 1022 is used to stabilize the DC voltage VDC. The coil 1A has a first end that is connected to the first end of the first capacitor 1022 and a second end. The first switch 1 〇 26 has a first end coupled to the second end of the coil 1024, a second end, and a third end. The sensing resistor 1 〇 28 has a first end coupled to the third end of the first switch 1026, and a second end coupled to the ground GND ′ where the sensing resistor 208 is used to sense the flow through M439316 of a switch 1〇26—current ID. The control circuit 1030 has a first end coupled to the second end of the first switch 1 〇 26 for generating a control signal cs according to a sense voltage vs generated by the current flowing through the first switch 206. To control the opening and closing of the first switch 1026, a first end for detecting the current ID, a third end, and a fourth end for outputting a dimming signal DS ' wherein the control circuit 1030 is of the type The system can be ld 7889, and the control signal CS is a pulse width modulation signal including an on-time and a off-time. The diode 1032 has a first end coupled to the second end of the coil 1024, and a second end for outputting the output voltage VOUT to the first end of the LED unit 〇4. A first valley 1034 has a first end connected to the second end of the diode 1032 and a second end coupled to the ground GND. As shown in Fig. 1, the power converter 102 further includes a rectifier 1〇36, a knife circuit 1038 and a second switch 1〇39. The rectifier 1036 has a first end connected to the positive end of the parent current power supply SAC for receiving an AC voltage vac, and a second end coupled to the first end of the first capacitor 1 22 for outputting a DC The voltage vdc, a third end, is coupled to the negative terminal of the AC power supply SAC, and a fourth terminal is coupled to the ground terminal GND. The voltage dividing circuit 1038 has a first end 'coupled to the second end of the diode 1 〇 32. The first is configured to output a first voltage to the third end of the control circuit 1030 according to the output voltage VOUT. And a third end, coupled to the ground GND; the second switch 1 has a first end coupled to the second end of the LED unit 1 〇 4, a second end, minus the control circuit The fourth end of the 1030 is used to connect the dimming signal DS, and the third end is connected to the ground GND. Since the dimming signal Ds can be a pulse width modulation signal, a high potential signal or a low potential signal, the second switch can control the brightness of the LED unit 1〇4 according to the M439316 optical signal DS. The second switch 1039 can adjust the current ILED flowing through the LED unit 1〇4 according to the dimming signal DS to control the brightness of the LED unit 104. In addition, the light-emitting diode unit 1〇4 is formed by connecting a plurality of light-emitting diode light strips (for example, five light-emitting diode light strips EL1-IL5) in series, so that five light-emitting diode light strips IL1_IL5 are flowed through. The current is equal to the current: ILED. Thus, the brightness of each of the five light-emitting diode strips ILi_iL5 will be the same. However, the present invention is not limited to the light-emitting diode unit 1〇4, which includes five hair-emitting diode light bars IL1-IL5. In addition, the light emitting diode unit 1〇4 is a direct light emitting diode unit, that is, the light emitting diode unit 104 is disposed under a liquid crystal panel, and the light emitting diode unit 104 emits light upward. . In addition, the cross-voltage of each of the light-emitting diode strips of the five LED strips IL1-IL5 is higher than 3〇v, and the five LED strips IL1-IL5 are transmitted through a rotating plate 1 〇42 are connected in series. In another embodiment of the invention, the five light-emitting diode strips ι〇_ΙΙ5 are connected in series via a printed circuit board 1042. As shown in Fig. 1, the rectifier 1036 is for rectifying the alternating voltage vac to generate and output a direct current voltage VDC to the coil 1024. The coil 1〇24, the first switch 1〇26 and the diode 1032 are used to boost the DC voltage VDC into an output voltage ν〇υτ, wherein the output voltage VOUT is used to drive the LED unit 104. When the first switch 1026 is turned on according to the control signal CS, the coil 1024 is used to store the power transmitted by the DC voltage 'and the second capacitor 1034 is used to release the stored energy of the second capacitor 1 〇 34 to drive the light-emitting two. Polar body unit 104. That is, when the first switch is turned on according to the control signal CS, since the diode 1032 is turned off, the electric current of the direct current voltage 9 VOTFT is misplaced in the coil 】G24 ′ instead of being transmitted to the output electric grinder VOUT. For example, when the first switch 1026 is turned off according to the control signal CS, the stored electric energy is released by M to simultaneously drive the light-emitting diode unit I to pull the capacitor 1〇34 to charge. That is, when the first switch 1026 is turned on according to the control signal At because the body 1032 is turned on, the coil 1024 can charge the diode unit 1G4 according to the stored electric H axis and charge the second capacitor. When the field power/melon 1D is greater than the current predetermined value, the control circuit 1030 can generate an overcurrent protection; when the first _ 厌 厌 V·! 1 is greater than a predetermined value of the power, the control circuit 〇3〇 can generate an overvoltage protection. The above-mentioned illuminating two-pole flip driving circuit provided by the present invention is a plurality of light-emitting diodes connected to the light-emitting diode unit by a rotating plate or a brushing circuit board w in series, so the interesting light-emitting diode unit The current of the plurality of LED strips is the current of the off-state, which generates the first voltage generated by the m and (4) voltage divider circuits to generate overvoltage protection. Therefore, the present invention has the following advantages: first, because a plurality of light-emitting diodes are connected 'so that a plurality of light-emitting diode strips correspond to only one brother-switch', the cost of the driving circuit can be reduced and the manufacturing is simple; Because the currents of the plurality of light-emitting diode strips of the light-emitting diode unit are the same, the brightness of each of the plurality of light-emitting diodes is the same; third, because of the plurality of light-emitting diodes The pole light bar has only one corresponding second switch, so the driving circuit of the light emitting diode is more energy-saving; fourth, because a plurality of light emitting diode light strips have only one corresponding second switch', it is easy to standardize the light emitting two The driving circuit of the polar body. M439316 The above is only the preferred embodiment of this creation. All changes and modifications made in accordance with the scope of patent application of this creation should be covered by this creation. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a driving circuit of a light-emitting diode according to an embodiment of the present invention. • [Main component symbol description] 100 drive circuit 102 power converter 104 light-emitting diode unit 1022 first capacitor 1024 coil 1026 first switch 1028 sense resistor 1030 control circuit 1032 diode 1034 second capacitor 1036 rectifier 1038 partial pressure Circuit ' 1039 second switch 1042 rotating plate 11 M439316 cs control signal DS dimming signal GND ground terminal > ILED current IL1-IL5 LED light bar SAC AC power VI first voltage VAC AC voltage VDC DC voltage VOUT Output voltage vs sense voltage 12