201216767 六、發明說明： 【發明所屬之技術領域】 本發明涉及發光二極體（LED)照明領域，特別是一 種可分級調光的LED燈的調光裝置。 【先前技術】 隨著科學技術的發展，半導體照明因節能、環保、壽 命長等特點而被廣泛應用於各個領域，特別是大功率led 燈。在LED燈的使用過程中，有時候燈光會過強或較暗而 影響到照明效果，需要進行調光。目前的LED燈的照明亮 度大多是固定的，雖然也有一些調光系統，但現有的調光 系統通常比較複雜且價格高，因此不能滿足各種不同的應 用環境的需求。 日本專利申請JP2007207734A公開了 一種可調光的 LED電燈，其中將多個LED連接到A/D轉換器的輸出和/ 或電路的輸出，通過控制多個LED中被點亮的LED的數量 ，來控制LED燈的總發光亮度。該專利申請不能分別調整 各個LED發光管的亮度。 中國發明專利 ZL2008 2 〇〇27042公開了一種可調光 LED路燈，它能夠通過在LED燈安裝板上加工不同角度的 平面來改變LED燈的佈置，可根據燈杆間距、燈杆高度、 路面寬度等來靈活變換所加工的平面折角，從而調節光照 範圍。該專利通過調節LED燈安裝板的結構來調整LED路 燈的光照範圍，而不能調整LED的光輸出。 本申請人的中國發明專利 ZL200510072474.8公開 201216767 了一種分級調光的螢光燈鎭流器，描述的是一種可通過開 關調光的螢光燈鎭流器。但該螢光燈鎭流器不能直接用於 LED 燈。 另外’在現有的技術中，還沒有應用普通電源開關對 LED進行調光的方案。 【發明内容】 本發明的目的在於克服以上缺陷，提供一種可以分級 調光的LED燈調光裝置，該調光裝置可以應用電源開關對 LED進行分級的調光，也可以使用外接的直流信號源輸入 的調光信號對LED進行分級的調光。這兩種調光方式是相 互獨立的，本發明的LED燈調光裝置可以包括其中任意一 種調光方式，也可以包含全部兩種調光方式。 爲了實現上述目的，本發明的LED燈調光裝置包括： 濾波整流線路，通過電源開關與供電電源相連接，將輸入 的交流電轉換爲直流脈動電壓；開關電源線路模組，其一 端與所述濾波整流線路相連接，將直流脈動電壓轉換爲穩 定電壓的直流電，以提供到負載LED燈；回饋電路模組， 其一端連接到所述開關電源線路模組的另一端，用於採樣 負載LED燈的電壓和/或電流信號並且回饋到所述開關電 源線路模組；調光信號產生模組，包括檢測電源開關的瞬 間狀態變化並轉換成調光信號輸出至調光控制器模組的開 關信號檢測線路模組，或者檢測外接信號源輸入的調光信 號並輸出至調光控制器模組的類比信號檢測線路模組，或 其組合；接收上述調光信號的調光控制器模組，其一端與 -4- 201216767 所述回饋電路模組相連接，所述調光控制器模組回應於輸 入的調光信號而產生調光控制信號輸出至所述回饋電路模 組，調節所述回饋電路模組提供到所述開關電源線路模組 的回饋信號，控制所述負載LED燈在預設的工作狀態迴圈 變動，實現分級調光。 根據本發明的LED燈的調光裝置，所述開關信號檢測 線路模組每次檢測到電源開關關斷後在預設時間內重新開 啓，會產生調光信號送到調光控制器模組，使其產生相應 的調光控制信號，控制LED燈按順序變動一個亮度狀態； 不斷地進行開關，其中關斷時間不大於預設時間，LED燈 按順序在預設的多個亮度狀態變動》 其中在調光控制信號的控制下，所述回饋電路模組使 所述開關電源線路模組輸出到負載LED燈的電壓和/或電 流改變，以進行分級調光。 本發明的調光裝置是在LED燈上進行分級調光的技術 方案，可以對LED燈進行預設有兩種或兩種以上的工作狀 態。根據本發明的一個方面，上述調光信號產生模組可以 是一個開關信號檢測線路模組，其中通過檢測電源開關的 瞬間狀態變化進行調光：用開關進行調光，通過識別電源 開關的瞬間狀態變化（例如從關斷到重開的時間）來控制 各個工作狀態的迴圈變動。每次電源關斷後在預設時間內 重新開啓，LED燈就按預定的程式變動一個工作狀態。不 斷地進行開關（關斷時間不大於預設時間），LED燈就按 預定的程式在預設的多個工作狀態迴圈變動。在任何狀態 201216767 ，如果關斷時間大於預設的時間以上重新上電燃點，LED 燈都將自動恢復到最亮或最暗的工作狀態。 根據本發明的另一個方面，所述調光信號產生模組可 以是類比信號檢測線路模組，以實現用外接的調光信號或 利用可變電阻器進行調光。 本發明的上述調光信號產生模組中還可以同時包括開 關信號檢測線路模組和類比信號檢測線路模組，以同時具 有兩種調光功能。 其中，濾波整流線路連接到外部供電電源如2 2 0V民用 交流電源，用來濾去交流信號中進來的雜波並把交流電轉 變爲直流電。在濾波整流線路與供電電源之間含有一個電 源開關，用於導通或關斷與供電電源的連接。 開關電源線路模組與負載LED燈相連接，主要包括 PWM (脈寬調製）控制器和高頻變壓器以及電源輸出線路 ，把上述直流電轉化爲高頻交流電，並通過控制相應的工 作頻率，爲負載LED燈提供合適的電壓，驅動負載LED燈 〇 開關檢測線路模組用來檢測電源開關的狀態變化，並 把檢測結果輸出至單晶片控制線路，從而判定是否需要對 LED燈進行調光。 類比信號檢測線路模組用來檢測外接的直流信號源輸 入的調光信號或通過可變電阻器產生的調光信號，並把檢 測結果輸出到調光控制器模組，從而判定是否需要對LED 燈進行調光。所述調光控制器模組可以由單晶片控制線路 201216767 形成。 模組的輸 比信號， 模組的電 所述單晶 經過負載 實現調光 電路模組 號回饋到 燈正常工 調光時， 而改變電 的調光。 線路模組 ，從而可 源輸入的 工作狀態 燈的分級 直接配合 的改動， 需要。 所述單晶片控制線路可以檢測開關檢測線路 出信號，也可以檢測外接的直流信號源輸入的類 所述單晶片控制線路的輸出連接到開關電源線路 源輸出線路。當識別到需要進行調光的信號時， 片控制線路的輸出調整所述電源輸出線路輸出的 LED燈的電流的大小，從而改變LED燈的亮度， 的目的。 所述回饋電路模組可以是一種恒流穩壓回饋 ，用於將上述輸出電路模組中的電壓和/或電流信 開關電源線路模組，以便對負載LED燈提供LED 作需要的穩定電壓和電流。當需要對LED燈進行 單晶片控制線路通過控制恒流穩壓回饋電路模組 源輸出線路輸出的電流大小，從而實現LE D分級 本發明的有益效果是：通過增加了開關檢測 、類比信號檢測線路模組和單晶片控制線路模組 以檢測電源開關的情況或者檢測外接的直流信號 調光信號’進而通過單晶片控制線路按照預設的 改變LED燈工作狀態的迴圈變動，從而實現LED 調光。使用本發明的調光裝置的LED調光燈可以 普通照明場合的電源開關使用，不需要增加額外 而從可以方便推廣’有益於滿足各種照明場合的 【實施方式】 通常有兩種控制單個LED亮度的方法：—種方法是利 201216767 用人眼的視覺惰性，用脈寬調製方法來實現灰度控制，也 就是週期性改變LED發光脈衝寬度（即負載比），只要這 個重複點亮的週期足夠短（即刷新頻率足夠高），人眼感 覺不到發光組件在閃爍。由於脈寬調製更適合於數位控制 ，所以普遍採用微電腦來提供LED顯示的驅動信號，例如 幾乎所有的LED顯示幕都是採用脈寬調製來控制灰度等級 的；另一種是改變流過LED的電流，即通過控制LED燈電 源的輸出電流，調節LED燈的亮度。除了紅色LED有飽和 現象外，其他顏色LED的亮度基本上與流過的電流成比例 〇 爲實現對LED燈進行穩定和可靠的分級調光，本發明 的對LED燈進行分級調光的裝置包括：濾波整流線路1、 開關電源線路模組2、回饋電路模組3、調光信號產生線路 模組、調光控制器模組5。所述調光信號產生線路模組可 以由開關信號檢測線路模組4或類比信號檢測線路模組6 形成，也可以同時包括兩個線路模組4、6。當本發明的調 光裝置中包含開關信號檢測線路模組4時，本發明可以應 用電源開關對LED燈進行分級調光。 濾波整流電路（在圖1-3中以標號1表示），包括π型濾 波電路和橋式整流器，它通過電源開關（未示出）與民用 交流供電電源連接以濾去高頻干擾電波’及把輸入的交流 電壓轉換爲直流脈動電壓。除了圖1所示的濾波整流電路 1之外，也可以採用本領域已知的其他合適的濾波整流電 路。 201216767 開關電源線路模組（在圖1 -3中以標號2表示），主 要包括PWM控制器和高頻變壓器TR以及相應的電源輸出 電路。從供電電源輸入的電壓經過濾波整流電路以後在電 解電容器C1兩端會得到一個直流的脈動電壓，該直流電壓 輸出給PMW控制器控制的轉換電路並通過高頻變壓器TR 的變壓，輸出低壓的交流電到電源輸出電路中的第二整流 濾波電路201的輸入端，經過該第二整流濾波電路201的 整流濾波後，輸出穩定的低壓直流電提供給負載LE D燈。 所述PWM控制器用於在一定頻率的方波中調整高電 平和低電平的負載比從而控制每個週期中高頻變壓器TR 的電壓電流信號，進而控制所述第二整流濾波電路20 1輸 出的電流的大小，由此調整負載LED燈的亮度。例如，假 設把一個頻率週期分爲1〇個時間等份，如果方波中的高低 電平負載比是1: 9，這時就是一個比較暗的亮度，如果方 波中高低電平負載比是〇 : 1 〇，這時，全部是低電平，燈 是滅的。如果高低電平負載比是5 : 5，就是中間亮度，如 果高低電平負載比是9: 1，是一個比較亮的亮度，如果高 低電平負載比是1〇:〇，這時全部是高電平，LED燈就是 最亮的。將PWM控制器的週期分得越多，所得到LED亮 度等級也越多。例如在LED顯示器中，通過PWM控制可 實現多達256級的亮度調節。對於照明用途來說，一般將 LED燈的亮度分爲10級就足夠了。 回饋線路模組（在圖1 - 3中以標號3表示）優選爲一 種恒流穩壓回饋線路模組，該回饋線路模組3分別與負載 201216767 LED和開關電源線路模組2相連接，對流過負: 流或電壓進行採樣並向PWM控制器回饋，以控 電路201爲負載LED提供穩定的電壓和恒定的 第一光電耦合器U 3提供恒流穩壓回饋線路模糸 3與PWM控制器之間的光電隔離。該恒流穩壓 組的另一個輸入端連接到調光控制器模組5的 應於調光控制器模組5的輸出端的電壓變化， PWM控制器中的負載比，從而改變流過LED煙 到調光的目的。所述回饋線路模組3可以由運； 與週邊電路構成，所述運算放大器U2本身可以 術中任何適用的運算放大器，例如TSM 103。所 器的一個參考電壓輸入端與調光控制器模組5 連接。 開關檢測線路模組（在圖1和圖3中以標 ，該電路的輸入端與濾波整流電路的輸出端連 流電路1中的點A，而輸出端與第二光電耦合| 端連接。一般來說，照明用的燈裝置經常會與 接後再連接到電源上，本發明的調光裝置中可 關，而是直接利用電源開關。也就是說，濾波 中S1、S2端子與電源開關串聯連接，再連接到 。這時，上述的開關檢測線路模組4可以直接 關的通斷狀態。另一方面，上述調光裝置中也 己的開關，例如當含有所述調光裝置的LED燈 ，這時開關可以位於端子S1或S2處，或者位 K LED的電 制整流濾波 電流，其中 1 ( CC/CV ) 回饋線路模 輸出端，回 相應地調整 的電流，達 i放大器U2 採用現有技 述運算放大 的輸出端相 號4表不） 接於濾波整 5 U4的輸入 電源開關串 以不含有開 整流電路1 供電電源上 檢測電源開 可以包含自 用作臺燈時 於濾波整流 -10- 201216767 電路1中任何合適的位置上。當電源開關或調光裝置 開關瞬間關斷時’ Α點的電壓會瞬間下降，開關檢測 檢測到A點電壓下降時，會輸出一個高電平（或低電 的脈衝信號到光電耦合器U4的輸入腳1，從而改變第 電耦合器U4的輸出腳3的瞬間電平狀態。所述開關檢 路模組可以簡單地由電容與齊納二極體並聯後再串聯 電阻構成，其中電容器的一端接地，另—端接到第二 耦合器U4。 所述調光控制器模組（在圖1 - 3中以標號.5表示 以由現有技術的可程式單晶片U5和相關週邊電路構月 調光控制器模組5的輸入端與第二光電耦合器U4的輸 連接’調光控制器模組5的輸出端與恒流穩壓回饋線 組3的一輸入腳連接。所述可程式單晶片 U5例 PIC12F615單晶片，所述調光控制器模組中還可以含 該單晶片供電的穩壓器U6。在可程式單晶片中寫入合 程式，當單晶片檢測到第二光電耦合器U 4的輸出腳的 變化（由高電平變爲低電平或由低電平變爲高電平） 單晶片控制與恒流穩壓回饋線路模組3連接的輸出腳 壓變化。所述合適的程式可以採用現有技術中任何適 程式，本領域技術人員也可以根據所採用的具體單晶 寫，只要能夠實現上述功能即可。 如上所述，恒流穩壓回饋線路模組3 —般由運算 器和相關電路構成，調光控制器模組5的輸出端的電 化，可以控制恒流穩壓回饋線路模組3中運算放大器 中的 線路 平） 二光 測線 幾個 光電 )可 $，該 出腳 路模 如是 有向 適的 電平 時， 的電 用的 片改 放大 壓變 的參 -11 - 201216767 考電壓’調整第一光電耦合器U3中輸入二極體的發光。恒 流穩壓回饋線路模組3通過第一光電耦合器U3連接到 PWM控制器，經隔離放大控制開關電源線路模組中開關管 的占空係數’通過隔離變壓器TR將不同占空係數的電能隔 離後轉換爲直流脈衝電流，經低通濾波器濾波後轉換爲大 小隨控制信號變化的直流電流，控制開關電源線路模組的 輸出電流，使恒流穩壓回饋線路模組3能夠改變通過負載 LED燈的電流變化，實現分級調光的目的。 本發明的調光信號產生裝置還可以包括類比信號檢測 線路模組6 (在圖2-3中以標號6表示），該類比信號檢測 線路模組6的輸入端與外接直流信號源連接，輸出端與調 光控制器模組5的另一個輸入腳連接。在調光控制器模組 5的單晶片中寫入合適的程式，當單晶片檢測到類比信號 檢測線路模組6輸出的調光信號時，單晶片控制與恒流穩 壓回饋線路模組3連接的輸出腳的電壓變化，從而通過恒 流穩壓回饋線路模組改變通過負載LED燈的電流變化，實 現調光的目的。所述外接直流信號源可以是任何產生直流 電壓信號的信號源。另外，所述類比信號檢測線路6也可 以使用可變電阻器來產生所述的類比信號。這時’類比信 號檢測線路6由可變電阻器和相關的電阻、電容網路構成 ，優選地，它可以由開關電源線路模組2供電。 另一種替換的方案是，本發明的調光裝置只採用類比 信號檢測線路模組6來調節LED發光亮度，而沒有包含開 關檢測線路模組4。這個方案也在本發明的範圍之內。圖 -12- 201216767 1-3中分別顯示了本發明的三種實施方式，圖1中顯示的方 案是調光裝置由開關檢測線路模組4構成；圖2中的方案 是調光裝置由類比信號檢測線路模組6 ;而在圖3的方案 中調光裝置包括開關檢測線路模組4和類比信號檢測線路 模組6，可以將兩種調光方式並存。 將開關檢測線路模組4和/或類比信號檢測線路模組6 以及調光控制器模組5相結合是本發明的創新。開關檢測 線路模組4的採樣點爲直流脈動電壓，當電源開關進行開 關動作時，圖1和圖3中A點電壓瞬間下降，開關檢測線 路模組檢測到A點電壓下降時，會輸出一個高電平（或低 電平）的脈衝信號到第二光電耦合器U4的輸入腳，從而使 第二光電耦合器U4的輸出腳變爲低電平（或高電平），調 光控制器模組5的單晶片輸出腳檢測到第二光電耦合器U4 的輸出腳的電平變化時，會相應地輸出一個電壓信號到恒 流穩壓回饋線路模組3，從而改變通過負載LED的電流大 小，達到調光的目的；類比信號檢測線路6檢測到外接的 直流信號源輸入的調光信號時，會輸出一檢測結果到調光 控制器模組5，從而調光控制器模組5中的單晶片會輸出 一個電壓信號到恒流穩壓回饋線路模組，從而改變通過負 載LED的電流大小，達到調光的目的。 本發明的可分級調光的LED燈調光裝置每次電源關斷 後在預設時間內重新開啓，LED燈就按預定的程式變動一 個工作狀態。不斷地進行開關（關斷時間不大於預設時間 )，LED燈就按預定的程式在預設的多個工作狀態迴圈變 -13- 201216767 動。在任何狀態，關斷時間大於預設的時間以上重新上電 燃點，LED燈都將自動恢復到最亮的工作狀態。根據實際 需要，通常可以選用2-10個工作狀態。而LED燈的迴圈變 動的工作狀態可以是由最亮逐級變暗到最暗，最後直接跳 回最亮；也可以是由最暗逐級變亮到最亮，最後直接跳回 最暗。 上述的“預設時間”可以由開關檢測線路模組4中的電 容器來決定，該電容器的容量的選擇可以區分開關的關斷 時間是否大於“預設時間”。上述預設時間一般選擇爲0-1 0 秒，較佳爲0 . 1 - 3秒，最佳爲0· 2 - 2秒。 另外，通過參數選擇和調整、預設程式的改變，該本 發明還可以實現另一種調光方式··用外接的直流信號源對 LED進行調光，如圖2和3所示，通過類比信號檢測線路 模組6檢測到外接的直流信號源有輸入調光信號時，類比 信號檢測線路6輸入信號檢測結果到調光制器模組5，其 中的單晶片通過回饋線路模組3PWM控制器中的占空係數 ’進而改變電源輸出線路輸出的經過負載LED燈電流的大 小’從而改變LED燈的亮度，實現調光的目的。 最後’上述內容應當被認爲是僅僅用於說明本發明的 原理’申請人不希望將本發明限制爲上面描述和顯示的具 體構造和操作。本領域技術人員可以對本發明的方案進行 大量的修改和變化而不超出本發明的教導，因此所有這些 修改和變化及其等同物也應落入本發明的範圍中。 -14- 201216767 【圖式簡單說明】 圖1是本發明的使用開關分級調光的LED燈調光裝置 的電路連接線路示意圖。 圖2是本發明的使用外接信號或可變電阻器分級調光 的LED燈調光裝置的電路連接線路示意圖。 圖3是本發明的包含上述兩種分級調光方式的LED燈 調光裝置的電路連接線路示意圖。 【主要元件符號說明】 1 濾 波 整 流 線 路 2 開 關 電 源 線 路 模 組 3 回 A由 睛 電 路 模 組 4 開 關 信 號 檢 測 線 路 模 組 5 調 光 控 制 器 模 組 6 類 比 信 號 檢 測 線 路 模 組 20 1 第 二 整 流 濾 波 電 路 C 1 電 解 電 容 器 S 1 , S2 端 子 TR 商 頻 變 壓 器 U2 運 算 放 大 器 U3 第 一 光 電 耦 合 器 U4 第 二 光 電 耦 合 器 U5 可 程 式 單 晶 片 U6 穩 壓 器 -15-201216767 VI. Description of the Invention: [Technical Field] The present invention relates to the field of light-emitting diode (LED) illumination, and more particularly to a dimming device for a gradable dimmable LED lamp. [Prior Art] With the development of science and technology, semiconductor lighting has been widely used in various fields due to its characteristics of energy saving, environmental protection, and long life, especially high-power LED lamps. During the use of LED lights, sometimes the light will be too strong or dark to affect the lighting effect, and dimming is required. The current illumination brightness of LED lamps is mostly fixed. Although there are some dimming systems, the existing dimming systems are usually complicated and expensive, so they cannot meet the needs of various application environments. Japanese Patent Application No. JP2007207734A discloses a dimmable LED electric lamp in which a plurality of LEDs are connected to an output of an A/D converter and/or an output of a circuit by controlling the number of LEDs that are lit among the plurality of LEDs. Controls the total brightness of the LED light. This patent application cannot separately adjust the brightness of each LED tube. Chinese invention patent ZL2008 2 〇〇 27042 discloses a dimmable LED street lamp, which can change the arrangement of LED lamps by processing planes of different angles on the LED lamp mounting plate, according to the pole spacing, the pole height, and the road width. It is also necessary to flexibly transform the plane chamfer to be processed to adjust the illumination range. This patent adjusts the illumination range of the LED street light by adjusting the structure of the LED lamp mounting plate, and cannot adjust the light output of the LED. The applicant's Chinese invention patent ZL200510072474.8 discloses 201216767 A hierarchical dimming fluorescent lamp choke, which describes a fluorescent lamp choke that can be dimmed by a switch. However, the fluorescent lamp choke cannot be used directly for LED lights. In addition, in the prior art, there is no solution for dimming an LED using a general power switch. SUMMARY OF THE INVENTION An object of the present invention is to overcome the above drawbacks and provide an LED lamp dimming device capable of stepwise dimming, which can be used for dimming LEDs by using a power switch, or by using an external DC signal source. The input dimming signal dims the LEDs hierarchically. The two dimming modes are independent of each other. The LED lamp dimming device of the present invention may include any one of the dimming modes, and may also include all two dimming modes. In order to achieve the above object, the LED lamp dimming device of the present invention comprises: a filter rectification line connected to a power supply through a power switch to convert an input alternating current into a DC ripple voltage; a switching power supply line module, one end thereof and the filtering The rectifying lines are connected to convert the DC ripple voltage into a stable voltage DC power to provide a load LED lamp; the feedback circuit module has one end connected to the other end of the switching power supply line module for sampling the load LED lamp And the voltage and/or current signal is fed back to the switching power supply line module; the dimming signal generating module includes: detecting a transient state change of the power switch and converting the dimming signal output to the dimming controller module for switching signal detection a line module, or an analog signal detecting circuit module for detecting a dimming signal input from an external signal source and outputting to a dimming controller module, or a combination thereof; a dimming controller module receiving the dimming signal, one end thereof Connected to the feedback circuit module of -4-201216767, the dimming controller module is responsive to the input dimming signal And generating a dimming control signal output to the feedback circuit module, adjusting a feedback signal provided by the feedback circuit module to the switching power supply line module, and controlling the load LED lamp to circulate in a preset working state Change to achieve hierarchical dimming. According to the dimming device of the LED lamp of the present invention, the switch signal detecting circuit module re-opens within a preset time after detecting that the power switch is turned off, and generates a dimming signal to be sent to the dimming controller module. The corresponding dimming control signal is generated, and the LED lamp is controlled to change a brightness state in sequence; the switch is continuously performed, wherein the off time is not greater than the preset time, and the LED lamp changes in a preset plurality of brightness states in sequence. Under the control of the dimming control signal, the feedback circuit module changes the voltage and/or current outputted by the switching power supply line module to the load LED lamp to perform hierarchical dimming. The dimming device of the present invention is a technical solution for performing stepwise dimming on an LED lamp, and two or more types of operation states can be preliminarily provided for the LED lamp. According to an aspect of the invention, the dimming signal generating module may be a switch signal detecting circuit module, wherein dimming is performed by detecting a transient state change of the power switch: dimming with a switch, and identifying a momentary state of the power switch Changes (such as the time from turn-off to re-opening) control the loop changes for each operating state. Each time the power is turned off, it is turned back on within the preset time, and the LED light changes according to the predetermined program. The switch is continuously turned off (the off time is not longer than the preset time), and the LED lamp changes in a predetermined plurality of operating states in accordance with a predetermined program. In any state 201216767, if the turn-off time is greater than the preset time, the LED will automatically return to the brightest or darkest working state. According to another aspect of the invention, the dimming signal generating module can be an analog signal detecting circuit module for dimming with an external dimming signal or with a variable resistor. The dimming signal generating module of the present invention may further include a switch signal detecting circuit module and an analog signal detecting circuit module to simultaneously have two dimming functions. The filter rectification line is connected to an external power supply such as a 2200V civil AC power source to filter out incoming clutter from the AC signal and convert the AC power to DC power. A power switch is included between the filter rectifier circuit and the power supply to turn on or off the connection to the power supply. The switching power supply line module is connected with the load LED lamp, and mainly comprises a PWM (pulse width modulation) controller, a high frequency transformer and a power output line, which converts the above direct current into high frequency alternating current, and controls the corresponding working frequency as a load. The LED lamp provides a suitable voltage to drive the load LED lamp. The switch detection circuit module is used to detect the state change of the power switch, and output the detection result to the single-chip control circuit to determine whether the LED lamp needs to be dimmed. The analog signal detection circuit module is configured to detect a dimming signal input from an external DC signal source or a dimming signal generated by a variable resistor, and output the detection result to the dimming controller module to determine whether the LED is needed. The lamp is dimmed. The dimming controller module can be formed by a single chip control circuit 201216767. The transmission ratio signal of the module, the single crystal of the module is subjected to the load, and the dimming circuit module number is fed back to the normal light dimming of the lamp, and the electric dimming is changed. The line module, thus the source of the input working state, the grading of the light directly matches the changes needed. The single-chip control circuit can detect the signal of the switch detection line, and can also detect the input of the external DC signal source. The output of the single-chip control line is connected to the switching power supply line source output line. When the signal requiring dimming is recognized, the output of the slice control line adjusts the magnitude of the current of the LED lamp outputted by the power output line, thereby changing the brightness of the LED lamp. The feedback circuit module may be a constant current voltage stabilization feedback for applying a voltage and/or current in the output circuit module to a switching power supply line module to provide a required voltage for the LED of the load LED lamp. Current. When the single-wafer control line of the LED lamp needs to be controlled by controlling the current output of the constant-current regulated feedback circuit module source output line, the LE D classification is achieved. The beneficial effects of the present invention are: by adding switch detection and analog signal detection lines. The module and the single-chip control circuit module detect the power switch or detect the external DC signal dimming signal', and then change the loop change of the working state of the LED lamp through a single-chip control circuit, thereby realizing LED dimming . The LED dimming lamp using the dimming device of the invention can be used for the power switch of the general lighting occasion, and can be conveniently promoted without adding extras. [Effectively satisfying various lighting occasions] Embodiments There are generally two kinds of control LED brightness. The method: the method is the 201216767 with the visual inertia of the human eye, using the pulse width modulation method to achieve gray control, that is, periodically changing the LED illumination pulse width (ie, the load ratio), as long as the cycle of repeated lighting is short enough (ie, the refresh frequency is high enough), the human eye does not feel that the light-emitting component is flickering. Since pulse width modulation is more suitable for digital control, a microcomputer is generally used to provide driving signals for LED display. For example, almost all LED display screens use pulse width modulation to control gray scale; the other is to change the flow of LEDs. The current, that is, the brightness of the LED lamp is adjusted by controlling the output current of the LED lamp power supply. In addition to the saturation of the red LED, the brightness of the other color LEDs is substantially proportional to the current flowing through. In order to achieve stable and reliable step dimming of the LED lamp, the apparatus for hierarchically dimming the LED lamp of the present invention includes The filter rectifier circuit 1, the switching power supply circuit module 2, the feedback circuit module 3, the dimming signal generation circuit module, and the dimming controller module 5. The dimming signal generating circuit module may be formed by the switch signal detecting circuit module 4 or the analog signal detecting circuit module 6, or may include two circuit modules 4, 6. When the dimming device of the present invention includes the switch signal detecting circuit module 4, the present invention can perform stepwise dimming of the LED lamp using the power switch. A filter rectifier circuit (indicated by reference numeral 1 in FIGS. 1-3) includes a π-type filter circuit and a bridge rectifier, which is connected to a civilian AC power supply through a power switch (not shown) to filter out high-frequency interference waves' and Convert the input AC voltage to DC ripple voltage. In addition to the filter rectifier circuit 1 shown in Fig. 1, other suitable filter rectifier circuits known in the art may be employed. The 201216767 switching power supply line module (indicated by the number 2 in Figure 1-3) mainly includes the PWM controller and the high frequency transformer TR and the corresponding power output circuit. After the voltage input from the power supply through the filter rectifier circuit, a DC ripple voltage is obtained at both ends of the electrolytic capacitor C1, and the DC voltage is output to the conversion circuit controlled by the PMW controller and is outputted through the high voltage transformer TR to output a low voltage. The input end of the second rectifying and filtering circuit 201 in the power supply output circuit is rectified and filtered by the second rectifying and filtering circuit 201, and the output of the stable low-voltage direct current is supplied to the load LE D lamp. The PWM controller is configured to adjust a load ratio of a high level and a low level in a square wave of a certain frequency to thereby control a voltage current signal of the high frequency transformer TR in each period, thereby controlling the output of the second rectifying and filtering circuit 20 1 The magnitude of the current, thereby adjusting the brightness of the load LED lamp. For example, suppose that a frequency cycle is divided into 1 time equal parts. If the high-low load ratio in the square wave is 1:9, then it is a darker brightness. If the high-low load ratio of the square wave is 〇 : 1 〇, at this time, all are low and the light is off. If the high-low load ratio is 5:5, it is the intermediate brightness. If the high-low load ratio is 9: 1, it is a brighter brightness. If the high-low load ratio is 1〇:〇, then all is high. Flat, the LED light is the brightest. The more the PWM controller's period is divided, the more LED brightness levels are obtained. For example, in an LED display, up to 256 levels of brightness adjustment can be achieved by PWM control. For lighting purposes, it is usually sufficient to divide the brightness of the LED lamp into 10 levels. The feedback circuit module (indicated by reference numeral 3 in FIG. 1-3) is preferably a constant current regulated feedback circuit module, and the feedback circuit module 3 is respectively connected with the load 201216767 LED and the switching power supply line module 2, and convection Over-voltage: The current or voltage is sampled and fed back to the PWM controller, and the control circuit 201 provides a stable voltage and constant for the load LED. The first photocoupler U 3 provides a constant current regulated feedback circuit module 3 and a PWM controller. Optical isolation between. The other input end of the constant current regulator group is connected to the voltage change of the dimming controller module 5 at the output end of the dimming controller module 5, the load ratio in the PWM controller, thereby changing the flow of the LED smoke. To the purpose of dimming. The feedback line module 3 can be implemented by a peripheral circuit, and the operational amplifier U2 itself can be used in any suitable operational amplifier, such as the TSM 103. A reference voltage input of the device is connected to the dimming controller module 5. The switch detection circuit module (in FIG. 1 and FIG. 3, the input end of the circuit and the output end of the filter rectifier circuit are connected to the point A in the circuit 1 and the output end is connected to the second optocoupler | terminal. In other words, the lighting device for lighting is often connected to the power source after being connected, and the dimming device of the present invention can be turned off, and the power switch is directly used. That is, the S1 and S2 terminals are connected in series with the power switch in the filtering. Connected, then connected. At this time, the above-mentioned switch detects that the line module 4 can be directly turned off. On the other hand, the switch of the above-mentioned dimming device also has, for example, an LED lamp containing the dimming device, At this time, the switch can be located at the terminal S1 or S2, or the electric rectified filter current of the bit K LED, wherein 1 (CC/CV) is fed back to the line mode output terminal, and the correspondingly adjusted current is returned to the i-amplifier U2 using the prior art operation. The amplified output phase number 4 is not). The input power switch string connected to the filter 5 U4 does not contain the open rectifier circuit. 1 The power supply on the power supply can be included in the filter rectification when it is used as a desk lamp. - 201216767 Any suitable position in circuit 1. When the power switch or dimmer switch is turned off momentarily, the voltage at the Α point will drop instantaneously. When the switch detects that the voltage at point A drops, it will output a high level (or a low-voltage pulse signal to the photocoupler U4). Input pin 1, thereby changing the instantaneous level state of the output pin 3 of the electric coupler U4. The switch quarantine module can be simply composed of a capacitor connected in parallel with the Zener diode and then a series resistor, wherein one end of the capacitor Grounded, otherwise connected to the second coupler U4. The dimming controller module (shown in Figure 1-3 with reference numeral 5 to form a monthly adjustment from the prior art programmable single chip U5 and related peripheral circuits The input end of the optical controller module 5 and the output connection of the second photocoupler U4 are connected to an input pin of the constant current regulated feedback line group 3. The programmable terminal is connected. The chip U5 is a PIC12F615 single chip, and the dimming controller module can also include the single-chip power supply voltage regulator U6. The program is written in the programmable single chip, and the second photocoupler is detected when the single chip is detected. U 4 output pin change (by The level changes to a low level or changes from a low level to a high level. The single chip controls the output pin voltage change connected to the constant current regulated feedback line module 3. The suitable program can be any suitable in the prior art. The program can also be written by a person skilled in the art according to the specific single crystal used, as long as the above functions can be realized. As described above, the constant current regulated feedback circuit module 3 is generally composed of an arithmetic unit and related circuits, and is dimmed. The electrification of the output of the controller module 5 can control the line in the operational amplifier of the constant current regulated feedback circuit module 3). The two optical measuring lines can be used for a certain amount of electricity. Usually, the electric piece is modified to amplify the pressure change of the reference -11 - 201216767 test voltage 'adjust the illuminance of the input diode in the first photocoupler U3. The constant current regulated feedback circuit module 3 is connected to the PWM controller through the first photocoupler U3, and the duty ratio of the switching tube in the switching power supply line module is isolated and amplified to pass the electric energy of different duty ratios through the isolation transformer TR. After isolation, it is converted into DC pulse current, filtered by a low-pass filter and converted into a DC current whose magnitude varies with the control signal, and the output current of the switching power supply line module is controlled, so that the constant current regulated feedback circuit module 3 can change the load through the load. The current change of the LED lamp achieves the purpose of grading dimming. The dimming signal generating device of the present invention may further include an analog signal detecting circuit module 6 (indicated by reference numeral 6 in FIG. 2-3), and the input end of the analog signal detecting circuit module 6 is connected to an external DC signal source, and the output is output. The terminal is connected to another input pin of the dimming controller module 5. A suitable program is written in the single chip of the dimming controller module 5, and when the single chip detects the dimming signal outputted by the analog signal detecting circuit module 6, the single chip control and constant current regulated feedback circuit module 3 The voltage of the connected output pin changes, so that the current change through the load LED lamp is changed by the constant current regulated feedback circuit module to achieve the purpose of dimming. The external DC signal source can be any signal source that generates a DC voltage signal. Alternatively, the analog signal detecting circuit 6 can also use a variable resistor to generate the analog signal. At this time, the analog signal detecting circuit 6 is constituted by a variable resistor and an associated resistor and capacitor network. Preferably, it can be powered by the switching power supply line module 2. Alternatively, the dimming device of the present invention uses only the analog signal detection circuit module 6 to adjust the LED illumination brightness without including the switch detection line module 4. This solution is also within the scope of the invention. FIG. 12 - 201216767 1-3 respectively show three embodiments of the present invention, and the scheme shown in FIG. 1 is that the dimming device is constituted by the switch detecting circuit module 4; the solution in FIG. 2 is that the dimming device is analogous signal The circuit module 6 is detected; in the solution of FIG. 3, the dimming device comprises a switch detection circuit module 4 and an analog signal detection circuit module 6, and two dimming modes can be coexisted. Combining the switch detection line module 4 and/or the analog signal detection line module 6 and the dimming controller module 5 is an innovation of the present invention. The sampling point of the switch detection circuit module 4 is a DC ripple voltage. When the power switch performs the switching action, the voltage at point A in FIG. 1 and FIG. 3 instantaneously drops, and when the switch detection circuit module detects the voltage drop at point A, a switch is output. a high-level (or low-level) pulse signal to the input pin of the second photocoupler U4, thereby causing the output pin of the second photocoupler U4 to become a low level (or high level), the dimming controller When the single-chip output pin of the module 5 detects the level change of the output pin of the second photocoupler U4, a voltage signal is correspondingly outputted to the constant current regulated feedback circuit module 3, thereby changing the current through the load LED. The size is up to the purpose of dimming; when the analog signal detection circuit 6 detects the dimming signal input by the external DC signal source, a detection result is output to the dimming controller module 5, thereby modulating the controller module 5 The single chip will output a voltage signal to the constant current regulated feedback circuit module, thereby changing the current through the load LED to achieve the purpose of dimming. The gradable dimming LED lamp dimming device of the present invention is re-opened within a preset time after each power-off, and the LED lamp changes a working state according to a predetermined program. The switch is continuously turned on (the off time is not longer than the preset time), and the LED lamp is looped in the preset multiple working states according to the predetermined program -13-201216767. In any state, if the off time is greater than the preset time and the power is turned on again, the LED light will automatically return to the brightest working state. According to actual needs, 2-10 working states can usually be selected. The working state of the loop of the LED lamp can be changed from the brightest to the darkest, and finally jumps back to the brightest; it can be brightened from the darkest to the brightest, and finally jumps back to the darkest. . The "preset time" described above can be determined by the capacitor in the switch detection line module 4, and the capacity of the capacitor can be selected to distinguish whether the off time of the switch is greater than the "preset time". The above preset time is generally selected to be 0-1 0 seconds, preferably 0.1 to 3 seconds, and most preferably 0·2 - 2 seconds. In addition, the present invention can also realize another dimming mode by parameter selection and adjustment, and a preset program change. · Dimming the LED with an external DC signal source, as shown in FIGS. 2 and 3, through the analog signal. When the detection circuit module 6 detects that the external DC signal source has an input dimming signal, the analog signal detection circuit 6 inputs the signal detection result to the dimming controller module 5, wherein the single chip passes through the feedback circuit module 3 PWM controller. The duty factor 'in turn changes the magnitude of the load LED lamp current output by the power output line' to change the brightness of the LED lamp for dimming purposes. The above description is to be considered as merely illustrative of the principles of the invention. A person skilled in the art can make various modifications and changes to the embodiments of the present invention without departing from the scope of the present invention, and all such modifications and variations and equivalents thereof are also included in the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a circuit connection circuit of an LED lamp dimming device using switch level dimming of the present invention. Fig. 2 is a schematic view showing the circuit connection circuit of the LED lamp dimming device of the present invention using an external signal or a variable resistor for stepwise dimming. Fig. 3 is a schematic view showing the circuit connection circuit of the LED lamp dimming device of the present invention comprising the above two hierarchical dimming modes. [Main component symbol description] 1 Filter rectifier circuit 2 Switching power supply line module 3 Back A eye circuit module 4 Switch signal detection circuit module 5 Dimming controller module 6 Analog signal detection circuit module 20 1 Second rectification Filter circuit C 1 Electrolytic capacitor S 1 , S2 Terminal TR Commercial frequency transformer U2 Operational amplifier U3 First optocoupler U4 Second optocoupler U5 Programmable single chip U6 Regulator -15-