201142782 JI w 1 .uviC/n 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種照明裝置與其光源控制電路，且 特別是有關於一種發光二極體的照明裝置與其光源控制電 路。 【先前技術】 發光二極體（Light Emitting Diode，簡稱 LED)具有 諸如壽命長、體積小、高抗震性、低熱產生及低功率消耗 等優點’因此已被廣泛應用於家用及各種設備中的指示器 或光源。近年來’發光二極體已朝多色彩及高亮度發展， 因此其應用領域已擴展至大型戶外看板、交通號誌燈及相 關領域。在未來，發光二極體甚至可能成為兼具省電及環 保功能的主要照明光源。 一般來說，發光二極體的控制電路大多都是將先將交 流電壓轉換成直流電壓或電流，之後再利用穩定的直流電 壓或電流來控制發光二極體的光源亮度。換而言之，習知 發光二極體的控制電路大多内嵌一交流/直流轉換器 (AC-DC converter)，或者是必須搭配一變壓器，才能藉由 又流的市電來予以控制。然而，上述控制電路的線路會過 於複雜，並且增加應用於大電壓範圍時的成本。此外，亦 可利用串聯電阻的方式來控制發光二極體的光源亮度，但 此種控制方式的能效太差。 、儿又 ~ 【發明内容】 201142782 J3〇j〇cwf.doc/n 尽知月徒供一種光源控制電路，利用電流匯集單元同 控夕個切換單元的H以藉此降低控制線路的複雜 度。 本么月提供-種照a月裝置，利用光源控制電路來提 %路的整體效能。 ，發月長1出一種光源控制電路’用以控制串接之N個 單：γΓ體’μ正整數，且光源控制電路包括電流供應 供isUlilVl11集單ΡΜΝ個轉單元。電祕應單元提 控制電流。電流匯集單元提供—匯集電流，並依據 自」=的位準而調整匯集電流的大小。則_換單元各 過复所_g^輸额與―電流路#，其+第Η_換單元透 透過傳輸路徑與第1個發光二極體相互並聯，並 外1具有的電流路徑與其餘的切換單元相互串接。此 具有的電、、^換早兀餘_#紐的大小，而導通其所 至電或是傳輸路徑，以將第i個參考電流傳送 源，i為整數^使第1個發光二極體無法產生光 的這些傳貫f例中，上述之則_換單元所具有 致使這此^上公會隨著匯集電流的增加而依序被關閉，以 換單元二極體逐一產生光源。此外，上述^個切 序被導ϋ 啦㈣祕㈣隨紐集電流的增加而依 集:工通，以致使上述Ν個參考電流逐一被導向至電流匯 在本發明之一實施例中’上述之第i個切換單元包括 201142782 .«oc/n 第N型電晶體、第一一 二壓降器1_N 1電晶體、以及第 二極體的陽極端，第—二^日5端電性連接第i個發光 個於# _ t電曰曰體的源極端電性遠技筮. 么光―極體的陰極端’第一 連接第！ 接電流供應單元，並接 曰體的閘極端電性連 Ϊ第=接第一N型電晶體的間極端，且第= 連接第—N型電晶體的源極端。 電晶體的閘極m晶體的汲極端電性連接第-n型 n型電晶體::極第端極:r連接第- N型電晶體的門托#咕 降β的弟一鳊電性連接第二 的=:::及第二Ν型電晶體的源極端她 從另-觀點來看’本發明提出—種㈣ ，-發光二極體與上述之光雜制電路， ^ 其中’所述Ν個第一發光二極體相 一垃砧㈣―日日·， 電源電壓與 一源㈣以控制所述Ν個第 _基於上述，本發明的光源控制電路是利用電流匯集單 凡同時操控多個切換單元的狀態。藉此，隨著電流匯集單 元所供之匯集電流的增加，所述多個切換單元將依^進 行切換，進而致使多個發光二極體逐一產生光源。如此一 來，本發明除了可以降低控制線路的複雜度，並同時兼顧 201142782 j)juj〇L\vf.doc/n 電路的整體效能。 —為讓本發明之上述特徵和優點能更，雜，下文特 舉實施例，並配合所附圖式作詳細說明如下。 【實施方式】 一圖1繪示為依據本發明之一實施例之照明裝置的電路 不意圖。請參照圖1，照縣置丨〇包括多個發光二極體 LDU〜LD„^ LD21〜LD23、-電阻rd、以及一光源控制電 路1〇〇。其中，發光二極體LDU〜LD1N、發光二極體 LD2广LD23與電阻Rd相互串接在電源電壓Vdd與接地端之 間。光源控制電路1〇〇用以控制發光二極體LD^〜LDw的 v通狀態’並藉此調整發光二極體1^〇11〜1^:^與]：1)21〜1^：^ 之間的串接個數。如此一來，照明裝置10將可透過光源控 制電路100來調整其所發出之光源的強弱。 值得一提的是，在實際應用上，發光二極體LDii〜LDin LDu LD23疋用以形成一發光二極體串列。此外，本領 域具有通常知識者可依設計所需，透過光源控制電路1〇〇 來控制發光二極體串列中部份或是全部的發光二極體。舉 例來說’圖1所示的光源控制電路100是用以控制發光二 極體串列中部份的發光二極體。然而，在實際應用上，發 光二極體串列也可僅由發光二極體LDn〜LD1N所構成。藉 此’此時的光源控制電路1〇〇將用以控制發光二極體串列 中全部的發光二極體。 睛繼續參照圖1，光源控制電路100是用以控制串接 201142782 ^^ujviwi..u〇c/n 之N個發光二極體LDll〜LDlN，其中N為正整數。更進一 步來看，光源控制電路1〇〇包括一電流供應單元11〇、一 電流匯集單元120以及N個切換單元13〇—!〜i3〇—n。在 此，電流供應單元i则以提供N個參考電流χ士舉例 來說’電流供應單元110包括Ν個電流源SDi〜SDn，苴中 電流源SDl用以產生參考電流l f流源為帛以產# 考電流12 ’其餘以此類推。 電流匯集單元12〇用以提供-匯集電流Ic，且電流匯 集单兀120係依據-控制電壓Vc的位準來調整匯集電流 Ic的大小。舉例來說’參㈣1，電流轉單元12〇包括 N型電晶體Mc與電阻Rc。其中，N型電晶體竣的没極 端串接切換單幻30一 ，且N型電晶體迹的閘極 端接收控制賴VG。雜Rg的第1紐連接N型電晶 體MC的源極端’且電阻Rc的第二端電性連接至接地端。 在實際操作上，當翻電壓Ve的位準改變時，N型電晶 體Mc之閘-源極端的電壓差將隨之改變，進而致使n型電 晶體Mc產生不同大小的匯集電流Ic。 切換單元130_1具有一傳輸路經pu與一電流路徑 P2〗。此外，切換單元13〇_1透過傳輸路徑Pll與發光二極 體LDU相互並聯’並透過電流路徑Pa與其餘的切換單元 130一2〜130_N相互串接。在實際操作上，隨著匯集電流1(： 的改變，切換單元13〇_1會導通傳輸路徑或是電流路 徑Ρζι。當傳輸路徑Pn關閉且電流路徑P21導通時，切換 單元130_1導通發光二極體LPn ’進而致使發光二極體 201142782 33636twf.doc/n 眾二元原丨。當傳:路徑匕導通且電流路徑〜關閉 12〇。 —1會將參考電流I!傳送至電流匯集單元 體/ΓΓ，厂參照圖1 ’切換單元請」包括N型電晶 21、壓降器⑶-1、以及壓降器132一卜其中， 端I 的沒極端電性連接發光二極體说1的陽極 1邱體1^11的源極端電性連接發光二極體的乙1^ 且N _晶體Mu的_端電性連接電流供應單 遠接Ν’二接日收參考電流11。壓降器131」的第一端電性 的閘極端，且壓降器的第二端 電性連接N型電晶體Μπ的源極端。 - ^型電晶體M21的祕端電性連㈣型電晶體心的 甲"鳊且N型電晶體m21的閘極端電性連接N型電晶體 =的源極端。壓降器132」的第—端電性連接n型電晶 ，M21的閘極端’且壓降器132」的第二端電性連接n型 電晶體m21的源極端。此外，切換單元13〇j透過n型電 晶體Ml 1 _極端以及N型電晶體M2i的源極端來與其餘 的切換單元130—2〜130_N相互串接。 一值得一提的是’在本實施例中，壓降器131j包括齊 納一極體ZD^ZDn。其中，齊納二極體2〇11的陰極端 電性連接N型電晶體Mu的閘極端。此外，齊納二極體 ZD1Z的陽極端電性連接齊納二極體ZDii的陽極端，且齊 納二極體zd1z的陰極端電性連接N型電晶體M"的源ς 端。再者，壓降器132J是由一電阻Ru所構成。然而， 201142782 ^ jxjjwvy x.u〇c/d 在其匕實化例中’壓降盗出」的電路架構不以此為限。 舉例來說，圖2A〜_ 2D分別為依據本發明之另一實施例 之，降器的電路示意圖，其中，如圖2A與圖2B所示，壓 降器132_1可由-齊納二極體咖所構成，或是由反接的 兩齊納-極體ZD2與ZD3所構成。再者，如圖2C與圖 2D所示，壓降器132_!可由串接的多個二極體Di所 構成，或是可由相互並聯的兩二極體串列21〇與22〇所構 成H極财列21G是由二極體串接而成， 且二極體串列220是由二極體D31〜知串接而成。 ，。月繼續參照圖卜在實際操作上，N型電晶體Μ"將 ^形成用以控制發光二極體的LDi導通與否的傳輸路徑 二tN $電晶體M12貝彳可形成將參考電流11導向至電流 =1兀120的電流路徑Ρ21。在此，切換單元13〇一 1是參 的苴電机1C的大小來導通傳輸路徑Pl1與電流路徑P21 的其中之一。 21 ，例來說’—開始，當匯集電流—等於叫，如$ 泛秣1 fDu所不，參考電流11會透過壓降器丨31-1導# 將i通:降器131-1所產生的购 路徑心。相源極端，進而導通· 的陽^ Γ 輸路彳 1 Pn導通時，發光二極體LD. 叫二極端將短路在—起’進而致使發光二極f 將唯持在ίί光/原。另一方面’此時的N型電晶體M: 1在不導通陳態，進而關電流路徑P21。 备匯集電流Ic從零逐漸增加至某一額定值時，如電3 201142782 ^j〇j〇iwf.doc/n 所:此來a二極體串列的電流v會被導向 態=電t體Mu將維持在不導通的狀 Γ^Μ U :机11所產生的電壓差將導通N型電 路徑Ρη將被關閉時，進而致使 X -木體LDd生光源。此外，電流路捏 送至電?匯集單元⑽1。值得注意 ❿ 路徑Pu並導通電流換早^ 13U會持續關閉傳輸 再者，相似地，切換單元13〇—2包括 t壓的降器I2、以及壓降叫 日日體Mlz的及極端電性連接發光二極體^^ =電^从2的源極端電性連接發光二極二吸陰極 -關極端電性連接電流供應單元 n型電12 °餅器13 L2的第-端電性連接 連接N型電晶體^的源極端。-的第-端電f生 閘極體地2的汲極端電性連接N型電晶體〜的 ⑷的源極端型=端電性連接N型電晶體. 體Μ痛_，：二^ -端電性連接N型電晶 =:r極端。此外，切換電型 的切換^:,'則型電晶體M22的源極端來與其餘 器⑶2且有^3〜13〇一N相互串接。此外，麗降 ~ 〇壓降器131j同樣的電路架構，且壓降器 11 201142782 J^o^otwi.aoc/n 1/2_1具有與壓降器132一2同樣的電路架構，故在此不予 贅述。 請繼續參照圖卜在實際操作上，一開始，集電 流Ic約等於G時，如電流方向CD12所示，參考^流12會 ，過壓降器131—2導向至發光二極體串列。此時，傳輸路 徑P12將會因應壓降器131_2所產生的電壓差而被導通， 且此時的電流路# P22是轉在不導通陳態。 流Ic漸增加至某—轉定值時，如電流方向，cd22戶^示，來 自發光二極體串列的電流12,會被導向至電P且Rl2。此時， 傳輸路徑P12將被關閉時，進而致使發光二極體 光源。此外’電流路徑^將被導通，以致 4 被傳送至電趋鮮元12〇。值躲意岐， + I2+V)時，切換單心0」會持續關閉傳輸 並 通電流路徑P21。 11 以此類可以得知’—開始，當匯集電流Ic約等於 〇時，切換單元130一1〜130—N所具有的傳給路^ 、 皆在導通的狀態，且切換單元13U〜13〇；所二^ 路徑P21~P2N皆在不導通(關閉）的狀態。換言之，一開^ S Ϊ11小時’N型電晶體Ml 1〜MlN皆導通:且。N 1電曰曰體21M2N皆不導通。此時，光源控制電路_ 控制的發光二極體LDi皆無法發出光源。 然而，當匯集電流Ic逐漸增加且Ic>(Ii+ v)時，切 換早疋13〇」將進行傳輸路徑Pn與電流路徑P21的切換， 以關閉傳輸路徑Pll並導通電流路徑L。此時=光= 極 12 201142782 33636twf.doc/n 體LD〗i將因應傳輸路徑Pli的關閉而產生光源，且參考電 流1丨將被導向至電流匯集單元120。接著，當匯隹雷 逐漸增加幻㈣，+l2+l2，)時，切換單 打傳輸路徑P!2與電流路徑Pa的切換，以關閉傳輸路徑 Pi2並導通電流路徑P22。此時，發光二極體]^^2將因應傳 輸路徑Pn的關閉而產生光源，且參考電流L將被導向至 電流匯集單元120。201142782 JI w 1 .uviC/n VI. Description of the Invention: [Technical Field] The present invention relates to an illumination device and a light source control circuit thereof, and more particularly to an illumination device for a light-emitting diode and a light source control circuit thereof . [Prior Art] Light Emitting Diode (LED) has advantages such as long life, small size, high shock resistance, low heat generation and low power consumption. Therefore, it has been widely used in households and various devices. Or light source. In recent years, 'light-emitting diodes have developed towards multiple colors and high brightness, so their applications have expanded to large outdoor billboards, traffic lights and related fields. In the future, LEDs may even become the main source of illumination for both power saving and environmental protection functions. In general, most of the control circuits of the light-emitting diodes convert the AC voltage into a DC voltage or current, and then use a stable DC voltage or current to control the brightness of the light source of the LED. In other words, the control circuit of the conventional light-emitting diode is usually embedded with an AC-DC converter, or it must be matched with a transformer to be controlled by the recurrent commercial power. However, the wiring of the above control circuit is too complicated and increases the cost when applied to a large voltage range. In addition, the series resistor can also be used to control the brightness of the light source of the light-emitting diode, but the energy efficiency of this control method is too poor. [Inventive content] 201142782 J3〇j〇cwf.doc/n It is known that the moon is used for a light source control circuit, and the current collecting unit is used to control the H of the switching unit to thereby reduce the complexity of the control circuit. This month provides a kind of a month device, using the light source control circuit to improve the overall efficiency of the % road. A light source control circuit is used to control the N singles of the series: γ Γ 'μ positive integer, and the light source control circuit includes a current supply for the isUlil Vl11 set single turn unit. The electric secret should be controlled by the unit. The current sinking unit provides - collecting current and adjusting the magnitude of the sinking current based on the level of "=". Then _ change unit each over the _g ^ output and "current path #, its + Η _ change unit through the transmission path and the first light-emitting diode in parallel with each other, and the outer 1 has a current path and the rest The switching units are connected in series. The electric, ^, change the size of the _# button, and turn on its power or transmission path to the i-th reference current transmission source, i is an integer ^ to make the first light-emitting diode In these examples of the inability to generate light, the above-mentioned _changing unit has such that the squadron is sequentially turned off as the collecting current increases, and the light source is generated one by one by changing the unit diode. In addition, the above-mentioned cutting sequence is guided by (4) secret (4) according to the increase of the current of the current collector: the work is passed, so that the above reference currents are guided one by one to the current sink in one embodiment of the present invention. The i-th switching unit includes 201142782. «oc/n N-type transistor, first-two voltage drop device 1_N 1 transistor, and anode end of the second polar body, the first two-day 5-terminal electrical connection The i-th illuminating source of the # _ t electric 的 body source extreme electrical technology . の light - the cathode end of the pole body 'first connection! The current supply unit is connected, and the gate terminal of the body is electrically connected to the terminal of the first N-type transistor, and the source terminal of the first-type N-type transistor is connected. The gate of the transistor m crystal is extremely electrically connected to the n-type n-type transistor:: the pole end pole: r connects the gate of the -N-type transistor #咕降β的鳊一鳊electrical connection The second source =::: and the source terminal of the second 电-type transistor. From another point of view, the present invention proposes a species (four), a light-emitting diode and the above-mentioned optical hybrid circuit, ^ where第一 a first light-emitting diode phase, an anvil (four) ―day ·, a power supply voltage and a source (four) to control the first _ based on the above, the light source control circuit of the present invention utilizes current collecting and single control at the same time The status of the switching unit. Thereby, as the collected current supplied by the current collecting unit increases, the plurality of switching units switch, thereby causing the plurality of light emitting diodes to generate the light sources one by one. In this way, the present invention can reduce the complexity of the control circuit and at the same time take into account the overall performance of the circuit of 201142782 j)juj〇L\vf.doc/n. - The above-described features and advantages of the present invention will become more apparent, and the following detailed description will be made in the accompanying drawings. [Embodiment] FIG. 1 is a circuit diagram of a lighting device according to an embodiment of the present invention. Referring to FIG. 1, the illuminating diode includes a plurality of light emitting diodes LDU LD LD 221 to LD23, a resistor rd, and a light source control circuit 1 〇〇. Among them, the light emitting diodes LDU LD LD1N, illuminating The diode LD2 wide LD23 and the resistor Rd are connected in series between the power supply voltage Vdd and the ground. The light source control circuit 1 is used to control the v-pass state of the light-emitting diodes LD^~LDw' The number of serials between the polar body 1^〇11~1^:^ and ]:1)21~1^:^. Thus, the illumination device 10 will be permeable to the light source control circuit 100 to adjust the emitted The strength of the light source. It is worth mentioning that, in practical applications, the light-emitting diodes LDii~LDin LDu LD23疋 are used to form a light-emitting diode series. In addition, those skilled in the art can design according to the needs. The light source control circuit 100 is used to control some or all of the light emitting diodes in the LED array. For example, the light source control circuit 100 shown in FIG. 1 is used to control the LED array. a part of the light-emitting diode. However, in practical applications, the LED array can also be The light-emitting diodes LDn to LD1N are configured. Thus, the light source control circuit 1 at this time will control all of the light-emitting diodes in the light-emitting diode series. With continued reference to FIG. 1, the light source control circuit 100 It is used to control N light-emitting diodes LD11 LDLDN LD11~LDlN connected in series 201142782 ^^ujviwi..u〇c/n, where N is a positive integer. Further, the light source control circuit 1 〇〇 includes a current supply unit 11〇, a current collecting unit 120 and N switching units 13〇-!~i3〇-n. Here, the current supply unit i provides N reference currents, for example, 'the current supply unit 110 includes one The current source SDi~SDn, the current source SD1 is used to generate the reference current lf flow source is 帛 to produce the test current 12' and so on. The current collecting unit 12〇 is used to provide the -collecting current Ic, and the current collecting unit The 兀120 system adjusts the magnitude of the sinking current Ic according to the level of the control voltage Vc. For example, the reference numeral (4)1, the current converting unit 12A includes the N-type transistor Mc and the resistor Rc, wherein the N-type transistor is not Extreme series switching single magic 30 one, and N type transistor trace The gate terminal receives the control VG. The first button of the hybrid Rg is connected to the source terminal of the N-type transistor MC and the second terminal of the resistor Rc is electrically connected to the ground. In actual operation, when the level of the voltage V is changed When the voltage difference of the gate-source terminal of the N-type transistor Mc will change, the n-type transistor Mc is caused to generate a different current Ic. The switching unit 130_1 has a transmission path through the pu and a current path P2. In addition, the switching unit 13〇_1 is connected in parallel with the light-emitting diode LDU through the transmission path P11 and is connected in series with the remaining switching units 130-2 to 130_N through the current path Pa. In actual operation, the switching unit 13〇_1 turns on the transmission path or the current path when the current 1 (: changes). When the transmission path Pn is turned off and the current path P21 is turned on, the switching unit 130_1 turns on the light-emitting diode. The body LPn 'in turn causes the light-emitting diode 201142782 33636twf.doc/n to be a binary binary. When passing: the path 匕 is turned on and the current path is turned off 12 〇. -1 will transfer the reference current I! to the current collecting unit body / ΓΓ, the factory refers to Figure 1 'switching unit please' includes N-type crystal 21, voltage drop (3)-1, and voltage drop 132. The end I is not extremely electrically connected to the anode of the light-emitting diode 1 The source of the Qiu body 1^11 is electrically connected to the B1 of the light-emitting diode and the _ terminal of the N_ crystal Mu is connected to the current supply. The reference current is 11. The first terminal is electrically connected to the gate terminal, and the second terminal of the voltage drop device is electrically connected to the source terminal of the N-type transistor Μπ. - The terminal end of the ^-type transistor M21 is electrically connected to the (four)-type transistor core "鳊 and the gate terminal of the N-type transistor m21 is electrically connected to the source terminal of the N-type transistor = voltage drop device 1 The first end of 32" is electrically connected to the n-type electric crystal, and the second end of the gate terminal '' and the voltage drop 132' of the M21 is electrically connected to the source terminal of the n-type transistor m21. Further, the switching unit 13〇j transmits n The source M1 1 _ terminal and the source terminal of the N-type transistor M2i are connected in series with the remaining switching units 130-2 to 130_N. It is worth mentioning that in the present embodiment, the voltage drop device 131j includes The nano-polar body ZD^ZDn, wherein the cathode end of the Zener diode 2〇11 is electrically connected to the gate terminal of the N-type transistor Mu. In addition, the anode end of the Zener diode ZD1Z is electrically connected to the Zener II The anode end of the polar body ZDii, and the cathode end of the Zener diode zd1z is electrically connected to the source terminal of the N-type transistor M" Further, the voltage drop device 132J is composed of a resistor Ru. However, 201142782^ Jxjjwvy xu〇c/d In its simplification, the circuit structure of 'pressure drop stealing' is not limited thereto. For example, FIGS. 2A to 2D are respectively according to another embodiment of the present invention, The circuit diagram of the device, wherein, as shown in FIG. 2A and FIG. 2B, the voltage drop device 132_1 can be composed of a Zener diode or a reverse connection. Two Zener-pole bodies ZD2 and ZD3 are formed. Further, as shown in FIG. 2C and FIG. 2D, the voltage drop device 132_! may be composed of a plurality of diodes Di connected in series, or may be connected in parallel with each other. In the polar body series 21〇 and 22〇, the H pole financial column 21G is formed by connecting the diodes in series, and the diode series 220 is formed by the diodes D31 to 270. Referring to the drawing, in the actual operation, the N-type transistor Μ<will form a transmission path for controlling the conduction of the LDi of the light-emitting diode. The tN$ transistor M12 can form the reference current 11 to the current= The current path of 1兀120 is Ρ21. Here, the switching unit 13 is a size of the reference motor 1C to turn on one of the transmission path Pl1 and the current path P21. 21 , for example, '- start, when the current is collected - equal to the call, such as $ 秣 1 fDu does not, the reference current 11 will pass through the pressure drop 丨 31-1 lead # will pass i: drop 131-1 The path of purchase. When the phase source is extreme, and then the anode is turned on, when the Pn is turned on, the light-emitting diode LD. The second pole will be short-circuited and then the light-emitting diode f will remain only in the light/origin. On the other hand, the N-type transistor M: 1 at this time is not turned on, and the current path P21 is turned off. When the current Ic is gradually increased from zero to a certain rated value, such as electricity 3 201142782 ^j〇j〇iwf.doc/n: The current v of the diode series will be guided to the state = electric t The body Mu will remain in a non-conducting state. U: The voltage difference generated by the machine 11 will turn on the N-type electric path Ρη will be turned off, thereby causing the X-wood LDd to generate a light source. Further, the current path is pinched to the power collecting unit (10) 1. It is worth noting that the path Pu is turned on and the current is turned on earlier. 13U will continue to turn off the transmission. Similarly, the switching unit 13〇2 includes the voltage drop I2 of the t voltage and the voltage drop is called the day Mlz and the extreme electrical connection. Light-emitting diode ^^ = electric source from 2 source terminal electrical connection light-emitting diode two-suction cathode - off extreme electrical connection current supply unit n-type electric 12 ° cake 13 L2 first-end electrical connection N The source terminal of the type transistor ^. - The first end of the electric gate of the gate body 2 is extremely electrically connected to the N-type transistor ~ (4) source terminal type = terminally electrically connected to the N-type transistor. Body pain _,: two ^ - end Electrical connection N-type electric crystal =: r extreme. In addition, switching of the switching mode ^:, 'the source terminal of the type transistor M22 is connected in series with the remaining devices (3) 2 and having ^3~13〇-N. In addition, the same circuit structure of the 降 ~ 〇 pressure drop device 131j, and the voltage drop device 11 201142782 J^o^otwi.aoc/n 1/2_1 has the same circuit structure as the voltage drop device 132-2, so here is not Give a brief description. Please continue to refer to the figure. In the actual operation, at the beginning, when the current Ic is equal to G, as indicated by the current direction CD12, the reference voltage 12 will be led, and the overvoltage drop 131-2 will be directed to the LED array. At this time, the transmission path P12 is turned on in response to the voltage difference generated by the voltage drop device 131_2, and the current path #P22 at this time is turned on. When the current Ic is gradually increased to a certain value, such as the current direction, the cd22 indicates that the current 12 from the LED series is directed to the power P and Rl2. At this time, when the transmission path P12 is turned off, the light-emitting diode light source is caused. In addition, the 'current path ^ will be turned on so that 4 is transferred to the electric fresh element 12 〇. When the value is hidden, + I2+V), switching single center 0" will continue to close the transmission and pass current path P21. 11 can be known as '-starting, when the collecting current Ic is approximately equal to 〇, the switching units 130-1 to 130-N have the transmitting path ^, all in the on state, and the switching units 13U~13〇 The two paths P21 to P2N are in a non-conducting (closed) state. In other words, one open ^ S Ϊ 11 hours 'N-type transistors Ml 1 ~ MlN are all turned on: and. N 1 electric body 21M2N is not conductive. At this time, none of the light-emitting diodes LDi controlled by the light source control circuit _ can emit a light source. However, when the sinking current Ic gradually increases and Ic > (Ii + v), the switching of the transmission path Pn and the current path P21 is performed to turn off the transmission path P11 and turn on the current path L. At this time = light = pole 12 201142782 33636twf.doc / n body LD〗 i will generate a light source in response to the closing of the transmission path Pli, and the reference current 1丨 will be directed to the current collecting unit 120. Next, when the 隹 隹 雷 gradually increases the magic (4), +l2+l2,), the switching of the single-pass transmission path P!2 and the current path Pa is switched to turn off the transmission path Pi2 and turn on the current path P22. At this time, the light-emitting diodes ^^2 will generate a light source in response to the turning off of the transmission path Pn, and the reference current L will be directed to the current collecting unit 120.
以此類推，切換單元130J〜130_N所具有的這些傳輸 路徑Ριι〜P1N會隨者匯集電流ic的增加而依序被關閉，以 致使發光一極體LDU〜LD1N逐一產生光源。此外，切換單 元130—1〜130_N所具有的這些電流路徑會隨著匯 集電流Ic的增加而依序被導通，以致使參考電流^〜^逐 一被導向至電流匯集單元12〇。值得一提的是，倘若參考 電流Ii用以表示第i個參考電流，且電流^，用以表示由發 光二極體串列導向至第i個切換單元的電流，則第k個切 換單元130—k進行傳輸路徑plk與電流路徑&的切換的條 件如式(1)所示： ”By analogy, the transmission paths Ρι1 to P1N of the switching units 130J to 130_N are sequentially turned off in accordance with the increase in the collection current ic, so that the light-emitting ones LDU to LD1N generate light sources one by one. In addition, the current paths of the switching units 130-1 to 130_N are sequentially turned on as the sink current Ic increases, so that the reference currents are collectively directed to the current collecting unit 12A. It is worth mentioning that if the reference current Ii is used to represent the i-th reference current and the current ^ is used to indicate the current guided by the LED array to the i-th switching unit, the k-th switching unit 130 -k The condition for switching the transmission path plk and the current path & is as shown in equation (1):
PgW式⑴ 換言之，如式(2)所示： Σι； i=l k+1 + Ii?< Ic< ^(2) i=l 當匯集電流Ic符合式(2)所示的條件時，第i至第k個切換 單元130_1〜130_k將進行傳輸路徑與電流路徑的切換，而 第(k+Ι)至第N個切換單元130_1〜13〇_1<：則是將傳輸路徑 13 201142782 j j v w w »· τ»*, v»o g/h 與電流路徑維持在原先的狀態，k為不小於丨之整數。也 就是，此時的傳輸路徑Pll〜Pik將被切換至不導通的狀態， 1傳輸路徑p1〇c+1广p1N則將維持在導通的狀態。此外广此 時的電流路徑hi〜將被切換至導通的狀態，而電流路徑 P2(k+1广Ρ2Ν則將維持在不導通的狀態。 一綜上所述，本發明的光源控制電路是利用電流匯集單 70同時操控多個切換單元的狀態。藉此，隨著電流匯集單 π所提供之匯集電流的增加，所述多個切換單元將依序進 行切換，進而致使多個發光二極體逐一產生光源。如此一 Φ 末本發月除了可以降低控制線路的複雜度，並同時兼顧 電路的整體效能。 雖然本發明已以實施例揭露如上，然其並非用以限定 本發明，任何所屬技術領域中具有通常知識者，在不脫離 本^明之精神和範圍内’當可作些許之更動與潤飾，故本 發明之保簡圍當視後附之申請專職圍所界定者為準。 【圖式簡單說明】 · 一土圖1繪示為無據本發明之一實施例之照明裝置的電路 /¾ 圖。 固2八〜圖2D分別為依據本發明之另一實施例之壓降 器的電路示意圖。 【主要元件符號說明】 10 :照明裴置 14 201142782 jj〇j〇iwf.doc/n 100 :光源控制電 110 :電流供應單元 120 :電流匯集單元 130_1〜130_N :切換單元 LDu〜LDin、LD21〜LD23 :發光二極體PgW (1) In other words, as shown in the formula (2): Σι; i=l k+1 + Ii?<Ic< ^(2) i=l When the collecting current Ic satisfies the condition shown by the formula (2), The i-th to kth switching units 130_1~130_k will perform switching between the transmission path and the current path, and the (k+Ι)th to the Nth switching units 130_1~13〇_1<: are the transmission path 13 201142782 jjvww »· τ»*, v»og/h and the current path are maintained in the original state, and k is an integer not less than 丨. That is, the transmission paths P11 to Pik at this time are switched to the non-conducting state, and the transmission path p1 〇 c+1 wide p1N is maintained in the on state. In addition, the current path hi~ at this time will be switched to the on state, and the current path P2 (k+12Ρ will remain in a non-conducting state. In summary, the light source control circuit of the present invention utilizes The current collecting unit 70 simultaneously controls the state of the plurality of switching units. Thereby, the plurality of switching units are sequentially switched as the current collecting current π provides an increase in the collecting current, thereby causing the plurality of light emitting diodes The light source is generated one by one. Such a Φ last month can not only reduce the complexity of the control circuit, but also take into account the overall performance of the circuit. Although the invention has been disclosed in the above embodiments, it is not intended to limit the invention, any technology Those who have ordinary knowledge in the field, and who can make some changes and refinements without departing from the spirit and scope of this invention, shall be subject to the definition of the application for full-time enclosure attached to the warranty of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a lighting device according to an embodiment of the present invention. Solid 2-8 to FIG. 2D are respectively according to another embodiment of the present invention. Schematic diagram of the dropper. [Main component symbol description] 10: Illumination device 14 201142782 jj〇j〇iwf.doc/n 100: Light source control device 110: Current supply unit 120: Current collection unit 130_1~130_N: Switching unit LDU ~LDin, LD21~LD23: Light-emitting diode
Rd、Rc、Rn〜Rin .電阻 V〇d :電源電壓 SDi〜SDn ·.電流源 Ιι〜In .參考電流Rd, Rc, Rn~Rin. Resistance V〇d: power supply voltage SDi~SDn ·. Current source Ιι~In. Reference current
Ic :匯集電流Ic: Collecting current
Vc :控制電壓 Μ。、Μ!广Μιν、Μ〗ι〜M2N . N型電晶體 131_1〜131—N、132—1-132—N :壓降器 ZDii〜ZDni、ZD12〜ZDn2、ZD1〜ZD3 .齊納二極體 Ριι〜Pin :傳輸路徑 ?21〜？2N .電流路控 CD!i、CD12、CD21、. CD22 .電流方向 D!广D13、D21 〜D23、D31 〜D33 .二極體 210、220 :二極體串列 15Vc : Control voltage Μ. Μ Μ Μ Μ Μ Μ Μ ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι ι N ι N N N N N N N N N N N N N N N N N N N N N N N N N Ριι~Pin: Transmission path? 21~? 2N . Current path control CD!i, CD12, CD21, CD22. Current direction D! Wide D13, D21 ~ D23, D31 ~ D33. Diode 210, 220: Diode series 15