201249247 六、發明說明： 【發明所扃之技術領域】 本發明是關於-種驅動電路’且特別是關於一種發光二極體 的驅動電路。 【先前技術】 請參照圖1’圖1所繪示為-種習知用於驅動或供電給多個發 光二極體的電路1〇〇。此電路100包括多個怪流電源11〇與多個發 光二極體組12G ’其中每-發光二極體組12G皆由多個發光二極體 122所串聯連接喊’且每一發光二極體組12()皆與—怪流電源 110相串聯。其中’每一發光二極體組12〇所發出的色光可能不同 於其他的發光二極體組120。例如，在圖丨中，由上至下每一發光 ,極體組120所發出的色光分別為白光、紅光、綠光、與藍^。 藉由開« -發光二極體組12G所對應的怪流電源UG，可將該發 光一極體組120點亮或關閉，藉此可調整亮度與色溫。此外，藉 由節奏式的點亮或關閉這些發光二極體組丨2〇，也可給使用者產生 不一樣的視覺效果。 然而，由於每一發光二極體組120皆須連接到一個恆流電源 110，而恆流電源11〇是屬於單價較高的電子元件，這樣會增加電 路100的整體成本。因此，如何設計出一種驅動電路，其可選擇 性地點亮或關閉某些發光二極體且又擁有較低的成本，是值得本 領域具有通常知識者思量地。 【發明内容】 本發明的主要目的在於提供一種驅動電路，此驅動電路可選 擇性地點亮或關閉某些發光二極體且又擁有較低的成本。 201249247 上述目的與其他目的’本發明提供-種發光二極體 的驅動電路。此驅動電路包括：—恆流 體 ’其中恒流電源技所提供的電流能維持值 =:?光二極體燈鍵是由多個發光二極體串聯連接而成，且 怪、了電^疋連接到發光二極體燈鏈的—端。此外，開關j述之 =-發光二極體相並聯’而部分的發光二極體則未與開關相並 個白體的驅動電路中，發光二極體燈鍵包括多 分的“發光二極體相二極體。其中’該開關是與部 體，且開關的個數為多個，每體與多個藍色發光二極 一開關相並聯。 母-顏色_分發光二極體皆與至少 多個 極體與部分轉峨自色發光二 極體與部分的彩色發光二極體皆與至少一開 個白色發ίίϋίΓ触動電路巾，魏二極體燈鍵包括多 且部分的t發^^彩色發光二極體，關的個數為多個， 關相並聯。 二Ϊ體的驅動電路中，更包括-控制 制器可為微控制器、電 器，此控 曰曰體、或繼電器，其是用以控制該開關的 4 201249247 導通與斷開。 極體是與該開關 於上述之發光二極體的驅動電路中，發光二 一同封裝。 根據上述目的與其他目的， 的驅動。舰誠路包括：—㈣電源、-發 t個開'其中，光二極體燈鏈是由多個發光二極體串:連接 成’且怪流賴是連_發光二極體燈_1。而且，每一 開關皆與多個發光二極體相並聯。 母 ㈣發γγγ路是藉由開關的導通與斷開來控制與其 並聯的發先二極體之熄滅與點亮，故於驅動電路中只需怪 而無需如習知般設置多恤流電源，因此整體的縣能 有效降低。 【實施方式】 為讓本發明之上述目的、特徵和優點更能明顯易懂， 下文將以實施例並配合所附圖式，作詳細說明如下。 請參照圖2A ’圖2A所繪示為本發明之第一實施例的發光二 極體的驅動電路200。此驅動電路2〇〇包括一悝流電源21〇與一發 光二極體燈鏈20 (LED chain)，其中發光二極體燈鏈2〇是由多個 發光二極體所串聯連接而成，而恆流電源21〇則是連接到發光二 極體燈鏈20的一端。在本實施例中，發光二極體燈鏈2〇分成白 色發光二極體組220與紅色發光二極體組230，其中白色發光二極 體組220是由多個白色發光二極體222以串聯的方式連接在一起 而成’而紅色發光二極體組230則是由多個紅色發光二極體232 以串聯的方式連接在一起而成。在本實施例_，白色發光二極體 組220的一端是連接到怪流電源210’而另一端則連接到紅色發光 201249247 二極體組230。 請繼續參照圖2A，驅動電路200還包括一開關280與一控制 器290 ’此開關280是與紅色發光二極體組230相並聯，並作為紅 色發光二極體組230的旁路(bypass)電流通路，當開關28〇被導通 後，電流便會流經開關280而不會流經紅色發光二極體232，而告 開關280被斷開後，電流便會流經紅色發光二極體232，而使紅色 發光二極體232點亮。當紅色發光二極體232被點亮後，發光二 極體燈鏈20的整體亮度會提高且整體所展現的顏色也會較趨向於 紅色。因此，藉由開關280的導通與斷開，可以控制發光二極體 燈鏈20的整體亮度及色溫。 在上述實施例中，開關280是與紅色發光二極體232相並聯， 但本領域具有通常知識者也可如圖2B的驅動電路·所示，將開 關280與部分的白色發光二極體222相並聯。或者，也可如圖 的驅動電路200”所示’於驅動電路2〇〇，中設置兩個開關28〇，其 中-個開關280是與紅色發光二極體232相並聯，而另外一個開 關280則是與白色發光沐體222相並聯。在圖2a至圖2c中， 開關280皆是由控制器29〇來控制開關28〇的導通〇n)與斷開 (触〇均’此控彻290例如為：微_器、電晶體、或繼電器 (Relay) 〇 請參照圖3,圖3所繪示為本發明之第二實施例的發光二極體 的驅動電路300。此驅動電路3⑽包括一恨流電源則與一發光二 極^燈鍵3〇 ’其中發光二極體燈鍵30是由多個發光二極體320 =聯連接而成’而怪流電源31〇貝,!是連接到發光二極體燈鏈3〇 胁端。在本實施例中，這些發光二極體32〇皆為白色發光二極 a且。[5分的發光一極體320則並聯有開關3⑼，這些開關 疋由控制器390所控制。藉由導通或斷開部分的開關，可調 6 201249247 整發光二極體燈鏈30整體的亮度。 請參照圖4A，圖4A所緣示為本發明之第三實施例的發光二 極體的驅動電路400。此驅動電路4〇〇包括一怪流電源仙斑一發 光二極體燈鏈40 ’其怖流電源是連接到發光二極體燈鍵4〇 的一端。在本實施例中，發光二極體燈鏈4〇是呈婉蜒曲折的形狀。 在發光二極體燈鍵40中，包括-白色發光二極體組42〇、一紅色 發光二極體組430、一綠色發光二極體組44〇、盥一藍 體組450，其分別是由多個白色發光二鋪似、、多個紅色^二 極體432、多個綠色發光二極體442、與多個藍色發光二極體松 所串聯連接而成。其中，每-發光二極體組皆並聯連接有一個開 關480，亦即在每一發光二極體組中，冑有部分的發光二極體與開 關480相並聯。另外，驅_路4⑻軌括一控制器49〇，此控制 器490可用以控制開關480的導通與斷開。 請繼續參照圖4A ’藉由控制個別的開關，可改變發光二 極體燈鏈4G整體所呈現的亮度與色溫。例如若將紅色發光丄極& 組430旁的部分開關480斷開，則發光二極體燈鍵4〇所呈現的顏 色便會偏、，工或者’若將白色發光二極體組42〇旁的部分開關伽 斷開’則發光二極體燈鍵4〇的整體亮度便會上升。此外，在本實 施例中，由於發光二極贿鏈40是呈婉蜒曲折的形狀，故可將發 光二極體燈鏈40收納在體積較小的燈具中。此外，藉 在圖4A中’每一發光二極體組皆只與一開關480。然而，請 參照圖4B，每一發光二極體組皆與多個_ 480相並聯，例如' 紅色發光二極體組430與三個開關48〇相並聯，而藍色發光二極 體組45〇則與二個開關480相並聯。在圖4B崎示的實施例中， 201249247 由於開關48G的數量較多’故其所呈現出的色彩變換也較多樣。 在上述的實施例中，每-開關皆與多個發光二極體相並聯， 但在發光二極體的數目較少的情況下，本領域 可將每-開關只與-發光二極體相並聯。另外，在‘之 路中’開關可與發光二極體燈鏈封裝在一起。請參照圖5A，圖5a 所繪不為開關與發光二極體組間的連接關係。在此 發光二極體組520皆是設置在電路板5〇上。藉由導線⑼與設置 ^電路板50上的金屬線路7〇,發光二極體522與開關58〇間進而 電性連接在-起。請參照圖5B，於開關58〇與發光二極體組52〇 的上方可設置封膠80，用以保護開關58〇與發光二極體組52〇。 綜上所述’由於本發明之實施例的鱗電路綠由開關 開來控制與其並聯的發光二極體之熄滅與點亮，故於驅動 電路中只需安裝-怪流電源，而無需如f知般設置多恤流電源， 因此整體的成本能有效降低。 ’、 本發明以實施例說明如上，然其並非用以限定本發 ^專利權職圍。其專娜護細當視_之巾請專 ^ ，圍内’所作之更動或潤飾，均屬於本發騎揭示精神下^ 成之等效改變或設計，且應包含在下述之申請專利範圍内。疋 【圖式簡單說明】201249247 VI. Description of the Invention: [Technical Field] The present invention relates to a drive circuit and particularly to a drive circuit for a light-emitting diode. [Prior Art] Referring to Fig. 1', Fig. 1 shows a circuit 1 for driving or supplying power to a plurality of light-emitting diodes. The circuit 100 includes a plurality of strange power sources 11 〇 and a plurality of light emitting diode groups 12G ′ each of which is connected in series by a plurality of light emitting diodes 12 and each of the light emitting diodes The body group 12() is connected in series with the strange power source 110. The color light emitted by each of the light-emitting diode groups 12 turns may be different from the other light-emitting diode groups 120. For example, in the figure, the color lights emitted by the polar body group 120 are white light, red light, green light, and blue ^, respectively, from top to bottom. The light-emitting diode group 120 can be turned on or off by turning on the strange current source UG corresponding to the light-emitting diode group 12G, whereby the brightness and the color temperature can be adjusted. In addition, by lighting or turning off these light-emitting diode groups 节奏2〇, it is also possible to give the user a different visual effect. However, since each of the light emitting diode groups 120 must be connected to a constant current power source 110, and the constant current power source 11 is a higher unit price electronic component, the overall cost of the circuit 100 is increased. Therefore, how to design a driving circuit that selectively illuminates or turns off certain light-emitting diodes and has a lower cost is worthy of consideration by those skilled in the art. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a driving circuit that selectively illuminates or turns off certain light emitting diodes and has a lower cost. 201249247 The above and other objects are provided. The present invention provides a driving circuit for a light-emitting diode. The driving circuit includes: - a constant current 'where the current can be maintained by the constant current power supply technology =: The optical diode key is formed by connecting a plurality of light emitting diodes in series, and the wiring is connected. To the end of the light-emitting diode chain. In addition, the switch j is described as follows: the light-emitting diodes are connected in parallel and the partial light-emitting diodes are not connected to the switch body in a white body. The light-emitting diode lamp key includes a plurality of "light-emitting diodes". Phase dipole, wherein 'the switch is a part, and the number of switches is multiple, each body is connected in parallel with a plurality of blue light-emitting diodes and switches. The mother-color_minute light-emitting diodes are at least The plurality of polar bodies and the partial turn-on self-coloring light-emitting diodes and the part of the color light-emitting diodes are at least one white hair ίίϋίΓ-touching the circuit towel, and the Wei two-pole light key includes a plurality of parts and a t-shaped ^ ^Color light-emitting diodes, the number of off-phase is multiple, and the phase-off is parallel. In the driving circuit of the two-body, the control system can be a microcontroller, an electric appliance, the control body, or a relay. It is used to control the switch 4 201249247 on and off. The pole body is the same as the switch in the above-mentioned driving diode of the light-emitting diode, and the light-emitting diode is packaged according to the above purpose and other purposes. Cheng Road includes: - (four) power, - send t open ' among them, light The polar body light chain is composed of a plurality of light-emitting diode strings: connected as 'and the strange flow is connected to the light-emitting diode lamp_1. Moreover, each switch is connected in parallel with a plurality of light-emitting diodes. The γγγ road is controlled by the conduction and disconnection of the switch to control the extinction and illuminating of the first diode in parallel with the switch. Therefore, it is only necessary to blame in the drive circuit without setting the power supply of the multi-shirt flow as is conventional, so the whole [Embodiment] The above described objects, features, and advantages of the present invention will become more apparent from the embodiments of the invention. 2A is a driving circuit 200 for a light emitting diode according to a first embodiment of the present invention. The driving circuit 2A includes a trickle power source 21A and a light emitting diode chain 20 (LED chain), wherein The light-emitting diode lamp chain 2 is formed by connecting a plurality of light-emitting diodes in series, and the constant current power source 21 is connected to one end of the light-emitting diode lamp chain 20. In this embodiment, the light-emitting diode 2 The polar body light chain 2 is divided into a white light emitting diode group 220 and a red light emitting diode The group 230, wherein the white light emitting diode group 220 is connected by a plurality of white light emitting diodes 222 in series, and the red light emitting diode group 230 is composed of a plurality of red light emitting diodes 232. Connected together in series. In this embodiment, one end of the white light emitting diode set 220 is connected to the strange current power source 210' and the other end is connected to the red light emitting 201249247 diode set 230. Please continue Referring to FIG. 2A, the driving circuit 200 further includes a switch 280 and a controller 290. The switch 280 is connected in parallel with the red LED group 230 and serves as a bypass current path for the red LED group 230. When the switch 28 is turned on, the current will flow through the switch 280 without flowing through the red LED 232, and after the switch 280 is turned off, the current will flow through the red LED 232. The red light emitting diode 232 is lit. When the red LED 232 is illuminated, the overall brightness of the LED chain 20 will increase and the overall color will tend to be red. Therefore, the overall brightness and color temperature of the light-emitting diode chain 20 can be controlled by the on and off of the switch 280. In the above embodiment, the switch 280 is connected in parallel with the red LED 232. However, those skilled in the art can also display the switch 280 and a portion of the white LED 222 as shown in the driving circuit of FIG. 2B. Parallel. Alternatively, as shown in the driving circuit 200" shown in the figure, in the driving circuit 2, two switches 28A are disposed, wherein one of the switches 280 is in parallel with the red LED 232, and the other switch 280 Then, it is connected in parallel with the white light-emitting body 222. In Figures 2a to 2c, the switch 280 is controlled by the controller 29〇 to control the conduction 〇n) and the disconnection of the switch 28〇 (the touch is both 290) For example, it is a micro-device, a transistor, or a relay. Referring to FIG. 3, FIG. 3 illustrates a driving circuit 300 for a light-emitting diode according to a second embodiment of the present invention. The driving circuit 3 (10) includes a Hate flow power is connected with a light-emitting diode 2 light button 3 〇 'where the light-emitting diode light button 30 is connected by a plurality of light-emitting diodes 320 = and the strange power source 31 mussels! In the present embodiment, the light-emitting diodes 32 are all white light-emitting diodes a. [5-minute light-emitting diodes 320 are connected in parallel with switches 3 (9), these switches疋 is controlled by controller 390. By turning on or off part of the switch, adjustable 6 201249247 full-light diode chain 30 Referring to FIG. 4A, FIG. 4A shows a driving circuit 400 for a light-emitting diode according to a third embodiment of the present invention. The driving circuit 4 includes a strange power supply, a sensation-light emitting diode. The lamp chain 40' is connected to the end of the light-emitting diode lamp key 4〇. In the embodiment, the light-emitting diode lamp chain 4 is in a meandering shape. The key 40 includes a white light emitting diode group 42〇, a red light emitting diode group 430, a green light emitting diode group 44〇, and a first blue body group 450, which are respectively composed of a plurality of white light emitting diodes a plurality of red-diodes 432, a plurality of green light-emitting diodes 442, and a plurality of blue light-emitting diodes are connected in series, wherein each of the light-emitting diode groups is connected in parallel There is a switch 480, that is, in each group of light emitting diodes, a part of the light emitting diodes are connected in parallel with the switch 480. In addition, the drive 4 (8) rail includes a controller 49, and the controller 490 is available. To control the conduction and disconnection of the switch 480. Please continue to refer to Figure 4A 'by controlling individual switches, The brightness and color temperature exhibited by the entire LED lamp chain 4G. For example, if the partial switch 480 of the red light-emitting diode & group 430 is turned off, the color of the light-emitting diode key 4〇 will be If the partial switch of the white light-emitting diode group 42 is turned off, the overall brightness of the light-emitting diode key 4〇 will rise. Further, in this embodiment, due to the light emission The two-pole briber chain 40 is in a meandering shape, so that the light-emitting diode lamp chain 40 can be housed in a small-sized lamp. In addition, in Figure 4A, each of the light-emitting diode groups is only A switch 480. However, referring to FIG. 4B, each of the light emitting diode groups is connected in parallel with a plurality of _480, for example, 'the red light emitting diode group 430 is connected in parallel with the three switches 48 ,, and the blue light emitting two The polar body group 45 is connected in parallel with the two switches 480. In the embodiment shown in Fig. 4B, 201249247 has a variety of colors due to the large number of switches 48G. In the above embodiments, each switch is connected in parallel with a plurality of light emitting diodes. However, in the case where the number of light emitting diodes is small, each switch can only be combined with the light emitting diode. in parallel. In addition, the 'in the road' switch can be packaged with the light-emitting diode lamp chain. Referring to FIG. 5A, FIG. 5a illustrates the connection relationship between the switch and the LED group. Here, the light emitting diode group 520 is disposed on the circuit board 5A. The light-emitting diode 522 and the switch 58 are electrically connected to each other by the wire (9) and the metal line 7 of the circuit board 50. Referring to FIG. 5B, a seal 80 may be disposed above the switch 58A and the LED group 52A to protect the switch 58A and the LED group 52A. In summary, since the scale circuit green of the embodiment of the present invention controls the extinguishing and lighting of the light-emitting diodes connected in parallel by the switch, it is only necessary to install the strange power source in the drive circuit, without It is known to set up a multi-shirt power supply, so the overall cost can be effectively reduced. The present invention is described above by way of example, but it is not intended to limit the scope of the patent. The special care of the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .疋 [Simple description]
圖1所繪示為-種習知用於驅動或供電給多個發光二極 電路。 J 圖2A所綠示為本發明之第一實施例的發光二極體的驅動 丄圖2B所綠示為本發明之第一實施例的其中一變形；圖 繪不為本發明之第一實施例的另外一變形。 8 201249247 圖3所繪示為本發明之第二實施例的發光二極體的驅動電 路。 圖4A所繪示為本發明之第三實施例的發光二極體的驅動電 路；圖4B所繪示為本發明之第三實施例的變形。 圖5A所繪示為開關與發光二極體組間的連接關係，圖5B所 繪示為覆蓋在開關與發光二極體組上的封膠。 【主要元件符號說明】 100 :電路 110 :恆流電源 120 :發光二極體組 122 :發光二極體 20 :發光二極體燈鏈 200、200’、200” ：驅動電路 210 :恆流電源 220 :白色發光二極體組 222 :白色發光二極體 230 :紅色發光二極體組 232 :紅色發光二極體 280 :開關 290 :控制器 30 :發光二極體燈鏈 9 201249247 300 :驅動電路 310 :恆流電源 320 :發光二極體 380 :開關 390 :控制器 40 :發光二極體燈鏈 400 :驅動電路 410 :恆流電源 420 :白色發光二極體組 422 :白色發光二極體 430 :紅色發光二極體組 432 :紅色發光二極體 440 :綠色發光二極體組 442 :綠色發光二極體 450 :藍色發光二極體組 452 :藍色發光二極體 480 :開關 490 :控制器 50 :電路板 520 :發光二極體組 201249247 522 :發光二極體 580 :開關 60 :導線 70 :金屬線路 80 :封膠Figure 1 illustrates a conventional use for driving or powering a plurality of light emitting diode circuits. Figure 2A shows the driving of the light-emitting diode according to the first embodiment of the present invention. Figure 2B shows a modification of the first embodiment of the present invention; the drawing is not the first embodiment of the present invention. Another variation of the example. 8 201249247 FIG. 3 is a diagram showing a driving circuit of a light emitting diode according to a second embodiment of the present invention. Fig. 4A is a view showing a driving circuit of a light emitting diode according to a third embodiment of the present invention; Fig. 4B is a view showing a modification of the third embodiment of the present invention. FIG. 5A illustrates the connection relationship between the switch and the LED group, and FIG. 5B illustrates the encapsulant over the switch and the LED group. [Description of Main Components] 100: Circuit 110: Constant Current Power Supply 120: Light Emitting Diode Group 122: Light Emitting Diode 20: Light Emitting Diode Light Chain 200, 200', 200": Driving Circuit 210: Constant Current Power Supply 220: white light-emitting diode group 222: white light-emitting diode 230: red light-emitting diode group 232: red light-emitting diode 280: switch 290: controller 30: light-emitting diode light chain 9 201249247 300: drive Circuit 310: constant current power source 320: light emitting diode 380: switch 390: controller 40: light emitting diode lamp chain 400: driving circuit 410: constant current power source 420: white light emitting diode group 422: white light emitting diode Body 430: Red LED Group 432: Red LED Diode 440: Green LED Group 442: Green LED 220: Blue LED Group 452: Blue LED 480: Switch 490: Controller 50: Circuit Board 520: Light Emitting Diode Group 201249247 522: Light Emitting Diode 580: Switch 60: Conductor 70: Metal Line 80: Sealant