201125434 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種燈具控制系統，特別係指一種適用公共 場所的可以節能的燈具控制系統。 【先前彳支#ί】 [0002] 目前，大功率發光二極體（LED)憑藉其節能、環保、高 效等特點，已被應用到越來越多的領域當中，如在路燈 、廣告燈、公園、走馬燈、列車等公共場所，都廣泛應 用，而且隨著太陽能等無市電場合的供電方式的普及應 用，將其與公共場所所需的LED燈具相結合，對人們生活 生產將都有很好作用。在這種公共場所，使用燈具的數 量非常龐大，若24小時或者12小時連續全亮使用，特別 在深夜情況下，其浪費較大，同時亮線對人們的休眠也 會產生滋擾，而且長時間的點亮，對燈具的使用壽命影 響也較大。 【發明内容】 [0003] 有鑒於此，有必要提供一種可定時調節照明亮度的燈具 控制系統。 [0004] 一種燈具控制系統，包括連接至燈具的一恒流電路，該 燈具控制系統還包括一連接至該恒流電路的控制電路， 該控制電路包括一計時單元、一控制單元及一 P W Μ信號發 生單元，該計時單元將燈具一次開啟與關閉之間持續使 用的時間作為一個週期設定複數時間段，於計時到每一 時間段終止時發出一時鐘信號至控制單元，控制單元接 收該時鐘信號後控制PWM信號發生單元輸出特定佔空比的 099100499 表單編號Α0101 第4頁/共17頁 0992001081-0 201125434 [0005] PWM信號至恒流電路，該恒流電路接收該特定佔空比的 PWM信號後輸出對應大小的電流至燈具，從而驅動燈具於 每一時間段内以特定的亮度進行照明。 與習知技術相比，該燈具控制系統可以控制燈具於較長 時間連續使用時於不同的時間段内以不同的亮度照明， 使其既可以滿足在實際需求中的照度要求，又可以避免 電能的浪費。 〇 [0006] [0007]201125434 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a lighting control system, and more particularly to an energy-saving lighting control system suitable for use in a public place. [Previously #支#ί] [0002] At present, high-power illuminating diodes (LEDs) have been applied to more and more fields due to their energy saving, environmental protection and high efficiency, such as street lamps, advertising lights, Public places such as parks, lanterns, trains, etc. are widely used, and with the popularization and application of power supply methods such as solar energy, it is combined with the LED lamps required in public places, which will be good for people's life production. effect. In such public places, the number of lamps used is very large. If 24 hours or 12 hours are used continuously, especially in the middle of the night, the waste is large, and the bright lines will also cause nuisance to people's dormancy, and The lighting of time has a great influence on the service life of the lamps. SUMMARY OF THE INVENTION [0003] In view of the above, it is necessary to provide a luminaire control system that can periodically adjust the brightness of illumination. [0004] A lamp control system includes a constant current circuit connected to a lamp, the lamp control system further comprising a control circuit connected to the constant current circuit, the control circuit comprising a timing unit, a control unit and a PW a signal generating unit that sets a time period of continuous use between the lamp on and off as a cycle to set a plurality of time periods, and sends a clock signal to the control unit when the timer expires, and the control unit receives the clock signal. The post-control PWM signal generation unit outputs a specific duty ratio of 099100499 Form No. 1010101 Page 4/Total 17 Page 0992001081-0 201125434 [0005] PWM signal to a constant current circuit, the constant current circuit receives the PWM signal of the specific duty ratio A corresponding amount of current is output to the luminaire, thereby driving the luminaire to illuminate with a specific brightness for each time period. Compared with the prior art, the luminaire control system can control the luminaire to be illuminated with different brightness in different time periods when used continuously for a long time, so that it can meet the illuminance requirement in actual demand and avoid electric energy. Waste. 〇 [0006] [0007]
[0008] 【實施方式】 以下參照附圖，對本發明發光二極體燈具及其控制電路 予以進一步說明。 請參閱圖1，為本發明一實施例中燈具控制系統10的電路 框圖，其包括一交流電源20、一交流/直流恒壓電路30、 一恒流電路40及一控制電路50。該燈具控制系統10用於 控制一燈具60於設定的時間段内以不同的亮度進行照明 。該燈具60連接於該恒流電路40。該燈具60為一發光二 極體（LED)路燈。 該交流/直流恒壓電路30的輸入和輸出分別與交流電源20 和恒流電路40電連接。該交流/直流恒壓電路30接受交流 電源20提供的交流電後，將交流電轉換成直流電並向恒 流電路40輸出電壓恒定的直流電。該恒流電路40為一帶 電壓輸入端的恒流源晶片電路，其可受其輸入電壓脈衝 寬度的影響而輸出不同大小和強度的恒定電流，即在該 恒流源晶片電路的電壓輸入端輸入不同的PWM (脈衝寬度 調節）信號可調節輸入至燈具60中的電流的大小。 099100499 表單編號A0101 第5頁/共17頁 0992001081-0 201125434 [0009] 該控制電路50包括一計時單元51、一控制單元53及一 PWM信號發生單元55。該計時單元51可以從燈具60每次 開啟的瞬間從零開始計時，於計時到一設定時間段屆滿 時發出一次時鐘信號至控制單元53，同時清零後繼續從 零開始計時。以該燈具60從開啟到關閉的同一次連續使 用的時間作為一個週期，該計時單元51將該一個週期分 為複數時間段，於每一時間段屆滿時分別發出一次時鐘 信號。該計時單元51可以為一計時器。該控制單元53分 別與計時單元51和PWM信號發生單元55電連接。該控制單 元53可對應該計時單元51於同一週期内發出的不同次時 鐘信號51而分別輸出不同的控制信號，例如，該控制單 元53接收該時鐘單元51於同一週期内第一次發出時鐘信 號時輸出一第一控制信號至該PWM信號發生單元55，第二 次發出時鐘信號時輸出第二控制信號至該PWM信號發生單 元55，所述第一、第二控制信號控制該PWM信號發生單元 55於對應時間段内向外輸出特定佔空比的PWM信號。該控 制單元53可以為一 CPU晶片。 [0010] 該控制電路50也可以包括一微控制單元（MCU，Microprogrammed Control Unit) ， 其通過於内部設定一程 式來實現上述計時單元51、控制單元53和PWM信號發生單 元5 5的功能。 [0011] 如圖2所示，為該控制電路50實現對該燈具60使用的兩段 式控制的曲線示意圖。其中，橫軸表示一個週期内計時 單元51設定的時間段，縱軸表示控制電路5 0向外輸出的 PWM信號的佔空比大小。假設該燈具60作為路燈應用每天 099100499 表單編號A0101 第6頁/共17頁 0992001081-0 201125434 晚上開啟後需要連續使用的時間為12個小時，第一時間 段為從夜晚6點至夜晚12點之間，該時間段内天由較亮逐 漸進入黑夜，路面上行人和車輛很多，為了保證安全， Ο 燈具60的光強應較大以維持足夠的路面照度；第二時間 段為從夜晚12點至浚晨6點之間，通常該時間段内路面上 的行人和車輛都較少，因此該燈具60的光強可適當減弱 便可滿足行車與行人的需要。因此，該計時單元51將12 個小時作為一個週期，設定兩個時間段，每一時間段為6 個小時進行計時。使用時，燈具60從夜晚6點開啟使用， 計時單元51從零開始計時，直至計時到第一個6小時内完 成之前，PWM信號發生單元55對應輸出100%佔空比的PWM 信號至恒流電路40，恒流電路40接收該PWM信號後輸出強 度較大的電流至燈具60，使得該燈具60的光強較強以能 足夠適用此時間段内的路面照明。當該燈具60使用至夜 晚12點時，計時單元51計時的第一個6小時完成，計時單 元51發出一次時鐘信號至控制單元53，同蔣清零繼續開 始計時，控制單元53接收該時鐘信號後輸出第一控制信 號至PWM信號發生單元55，從而控制該PWM信號發生單元 55輸出50%佔空比的PWM信號至恒流電路40，恒流電路40 接收該PWM信號後輸出強度相對較小的電流至燈具60，使 得該燈具60的光強減弱，即可以適當補償路面照明以保 證路面上那些較少的行人和車輛的安全，同時減少電量 的消耗，達到節能的目的。 [0012] 099100499 該控制電路50通過計時單元51將一個週期分設成不同數 量的時間段還可以形成對燈具60的任意多段式控制。如 表單編號A0101 第7頁/共17頁 0992001081-0 201125434 圖3所示，為該控制電路50對燈具60的使用實現三段式控 制的曲線示意圖。同樣假設該燈具60每天開啟後需要連 續使用的時間為12個小時，第一時間段為從夜晚6點至夜 晚10點之間，該時間段内天由較亮逐漸進入黑夜，路面 上行人和車輛很多；第二時間段為從夜晚10點至浚晨2點 之間，路面上行人和車輛較少；第三時間段為從浚晨2點 至浚晨6點之間，路面上行人和車輛非常稀少。因此，該 控制電路50同樣以該燈具6 0夜晚6點開啟每天點亮12個小 時為前提進行設計，計時單元51將12個小時作為一個循 環週期分成三個時間段，每一時間段為4個小時。使用時 ，計時單元51於燈具60夜晚6點開啟的同時從零開始計時 ，直至第一個4小時完成時，PWM信號發生單元55持續輸 出100%佔空比的PWM信號至恒流電路40。當燈具60使用 至夜晚10點時，計時單元51計時的第一個4小時對應完成 ，計時單元51第一次發出時鐘信號至控制單元53，同時 從零開始第二時間段的計時，控制單元53接收該第一次 時鐘信號後輸出第一控制信號至PWM信號發生單元55，從 而控制該PWM信號發生單元55由輸出1 00%佔空比的PWM信 號轉變成輸出70%佔空比的PWM信號，該PWM信號發生單 元55持續輸出70%佔空比的PWM信號至該恒流電路40直至 計時電路51發出下一次時鐘信號。當燈具60使用至浚晨2 點時，計時單元51計時的第二個4小時對應完成，因此， 計時單元51第二次發出時鐘信號至控制單元53，同時再 次從零開始進入該週期内的第三時間段的計時，控制單 元53接收該第二次時鐘信號後輸出第二控制信號至PWM信 號發生單元55，控制該PWM信號發生單元55由輸出70%佔 099100499 表單編號A0101 第8頁/共17頁 0992001081-0 201125434 匕的PWM仏號轉變成輪出40%佔空比的PWM信號至恒流 電路40。 [0013] 如圖4所示，為播 句艰過該控制電路50對燈具60實現四段式控 &的=線^'圖^其中’計時單元51將丨2個小時作為— 個循壞週期分成了時間長度不相等的四個時間段。第一 時間&為從夜晚6點至夜晚7點之間，該時間段内路面上 私和車輛很多’但由於天還較亮’燈具60的光強可以 #小便此滿足路面照度；第二時間段為夜晚7點至夜晚以 〇 •點之間’此時天已經黑了，且路面上行人和車輛很多； 第三時間段為從耗㈣福晨1點之間，該時間段内行 人和車輛較少；第四時間段為淡晨1點至浚晨6點之間’ 該時間段内行人和車輕稀少 <因此，設定計時單元51 一 個週期内進行計時的第一時間段為1個小時，第二、第三 時間段分別為3個小時，第四時間段為_小時。使用時 ’計時單疋51從零開始計時至1小時内，pWM信號發生單 元55輸出70%佔空比的號至恒流電路;計時單元 〇 51計時到1小時完便發出第一次時鐘信號至控制單元53， 控制單兀53對應輸出第一控制信號至PWM信號發生單元55 以控制其輸出100%佔空比的PWM信號至恒流電路4〇，同 時計時單元51清零開始進入第二時間段的計時；當計時 單元51計時到3小時完時第二次發出時鐘信號至控制單元 53 ’控制單元53接收該第二次時鐘信號後對應輸出第二 控制信號至P W Μ信號發生單元5 5使其輸出7 〇 %佔空比的 PWM信號至恒流電路40，同時計時單元51再次清零開始進 入第二時間段的計時；類似的，當計時單元51計時到3小 099100499 表單編號Α0101 第9頁/共17頁 0992001081-0 201125434 時完第三次發出時鐘信號至控制單元53，控制單元53接 收該第三次時鐘信號後對應輸出第三控制信號至P W Μ信號 發生單元55使其輸出40°/»佔空比的PWM信號至恒流電路40 ，同時計時單元51清零開始進入第四時間段的計時。於 每一時間段内，PWM信號發生單元55總是持續輸出對應佔 空比的PWM信號直至計時單元51發出下一次時鐘信號，如 此控制該恒流單元4 0於對應的時間段内可以穩定地輸出 與該PWM信號的佔空比大小相對應的恒定電流以驅動燈具 60發出不同強度的光線。 [0014] 因此，該控制電路50將燈具60於一次對應的開啟與關閉 之間需要持續使用的時間分成複數時間段，通過於不同 的時間段固定輸出不同的PWM信號至恒流電路40，從而控 制該恒流電源40可於不同時間段内輸出不同大小的電流 至燈具60，使得燈具60可於對應的時間段以特定的亮度 照明，因此該燈具60既能滿足不同時間段的照明需求， 同時也合理地避免了光能的浪費。另外，由於該控制電 路50對燈具60的亮度的控制是通過於不同的時間段輸出 不同的PWM信號至恒流電路40，然後通過恒流電路40驅動 燈具60發光，因此，每一時間段内恒流電路40輸出的電 流大小都是恒定的，因此可以避免ΜΜ信號脈衝頻率過高 而對燈具60内的LED的使用壽命和工作穩定性造成損害。 [0015] 綜上所述，本發明符合發明專利之要件，爰依法提出專 利申請。惟以上所述者僅為本發明之較佳實施例，舉凡 熟悉本案技藝之人士，在爰依本發明精神所作之等效修 飾或變化，皆應涵蓋於以下之申請專利範圍内。 099100499 表單編號A0101 第10頁/共17頁 0992001081-0 201125434 【圖式簡單說明】 [0016] 圖1是本發明一實施例中燈具控制系統的電路框圖。 [0017] 圖2是圖1中控制電路的分段式定時控制的第一實施例的 曲線示意圖。 [0018] 圖3是圖1中控制電路的分段式定時控制的第二實施例的 曲線示意圖。 [0019] 圖4是圖1中控制電路的分段式定時控制的第三實施例的 〇 曲線示意圖。 【主要元件符號說明】 [0020] 燈具控制系統：10 [0021] 交流電源：20 [0022] 交流/直流恒壓電路：30 [0023] 恒流電路：40 [0024] 控制電路：50 〇 v [0025] 計時單元：51 [0026] 控制單元：5 3 [0027] PWM信號發生單元：55 [0028] 燈具：60 099100499 表單編號A0101 第11頁/共17頁 0992001081-0[Embodiment] Hereinafter, a light-emitting diode lamp and a control circuit thereof according to the present invention will be further described with reference to the accompanying drawings. 1 is a circuit block diagram of a lamp control system 10 according to an embodiment of the present invention, which includes an AC power source 20, an AC/DC constant voltage circuit 30, a constant current circuit 40, and a control circuit 50. The luminaire control system 10 is operative to control a luminaire 60 to illuminate at different brightnesses for a set period of time. The luminaire 60 is connected to the constant current circuit 40. The luminaire 60 is a light emitting diode (LED) street light. The input and output of the AC/DC constant voltage circuit 30 are electrically connected to the AC power source 20 and the constant current circuit 40, respectively. The AC/DC constant voltage circuit 30 receives the alternating current supplied from the alternating current power source 20, converts the alternating current into direct current, and outputs a constant direct current to the constant current circuit 40. The constant current circuit 40 is a constant current source chip circuit with a voltage input end, which can output a constant current of different magnitude and intensity due to the influence of the input voltage pulse width, that is, the input of the voltage input terminal of the constant current source chip circuit is different. The PWM (Pulse Width Adjustment) signal adjusts the amount of current input to the luminaire 60. 099100499 Form No. A0101 Page 5 of 17 0992001081-0 201125434 [0009] The control circuit 50 includes a timing unit 51, a control unit 53, and a PWM signal generating unit 55. The timing unit 51 can start timing from zero at the moment the luminaire 60 is turned on, and issue a clock signal to the control unit 53 when the timer expires until a set period of time expires, and continues to count from zero after being cleared. The time of the same continuous use of the lamp 60 from on to off is taken as a cycle, and the timing unit 51 divides the one cycle into a plurality of time periods, and respectively issues a clock signal when each time period expires. The timing unit 51 can be a timer. The control unit 53 is electrically connected to the timing unit 51 and the PWM signal generating unit 55, respectively. The control unit 53 can output different control signals respectively for different clock signals 51 that the timing unit 51 sends out in the same cycle. For example, the control unit 53 receives the clock signal 51 for the first time in the same cycle. And outputting a first control signal to the PWM signal generating unit 55, and outputting a second control signal to the PWM signal generating unit 55 when the clock signal is outputted for the second time, the first and second control signals controlling the PWM signal generating unit 55 outputs a PWM signal of a specific duty ratio outward in a corresponding period of time. The control unit 53 can be a CPU chip. [0010] The control circuit 50 may also include a micro control unit (MCU) that implements the functions of the timing unit 51, the control unit 53, and the PWM signal generating unit 55 by internally setting a program. [0011] As shown in FIG. 2, a schematic diagram of the two-stage control used for the luminaire 60 is implemented for the control circuit 50. The horizontal axis represents the time period set by the timer unit 51 in one cycle, and the vertical axis represents the duty ratio of the PWM signal outputted from the control circuit 50. Assume that the luminaire 60 is used as a streetlight application every day. 099100499 Form No. A0101 Page 6 / Total 17 Pages 0992001081-0 201125434 The time required for continuous use after opening at night is 12 hours. The first time period is from 6 pm to 12 pm. During this period of time, the sky gradually enters into the night, and there are many pedestrians and vehicles on the road. In order to ensure safety, the light intensity of the luminaire 60 should be large to maintain sufficient road illumination; the second time period is from 12 o'clock in the evening. Between 6 am and midnight, there are usually fewer pedestrians and vehicles on the road during this time period. Therefore, the light intensity of the luminaire 60 can be appropriately reduced to meet the needs of pedestrians and pedestrians. Therefore, the timing unit 51 sets 12 hours as one cycle, sets two time periods, and each time period is 6 hours for timing. In use, the luminaire 60 is turned on from 6 o'clock in the night, and the timing unit 51 starts counting from zero until the timing is completed in the first 6 hours, and the PWM signal generating unit 55 outputs a PWM signal of 100% duty ratio to the constant current. The circuit 40, after receiving the PWM signal, outputs a high-intensity current to the luminaire 60, so that the illuminance of the luminaire 60 is strong enough to be suitable for road illumination in this period of time. When the luminaire 60 is used until 12 o'clock in the evening, the first 6 hours of the counting unit 51 is completed, the timing unit 51 sends a clock signal to the control unit 53, and continues to start timing with Chiang Qing, and the control unit 53 receives the clock signal. The first control signal is output to the PWM signal generating unit 55, thereby controlling the PWM signal generating unit 55 to output a 50% duty cycle PWM signal to the constant current circuit 40, and the constant current circuit 40 receives the PWM signal and the output intensity is relatively small. The current is applied to the luminaire 60, so that the light intensity of the luminaire 60 is weakened, that is, the road surface illumination can be appropriately compensated to ensure the safety of fewer pedestrians and vehicles on the road surface, and the power consumption is reduced to achieve the purpose of energy saving. [0012] 099100499 The control circuit 50 divides one cycle into a different number of time periods by the timing unit 51, and can also form any multi-segment control of the luminaire 60. For example, Form No. A0101, page 7 / page 17 0992001081-0 201125434 FIG. 3 is a schematic diagram showing the three-stage control of the use of the lamp 60 by the control circuit 50. Also assume that the luminaire 60 needs to be used continuously for 12 hours after being turned on every day. The first time period is from 6 pm to 10 pm, during which time the day is brighter and gradually enters the night, the pedestrians on the road and There are a lot of vehicles; the second time period is from 10:00 pm to 2:00 am, there are fewer pedestrians and vehicles on the road; the third time period is from 2 am to 6 am, the road pedestrians and The car is very rare. Therefore, the control circuit 50 is also designed on the premise that the lamp 60 is turned on for 12 hours per day at 6 o'clock in the night, and the timing unit 51 divides 12 hours as one cycle into three time segments, each time period is 4 Hours. In use, the timing unit 51 starts from zero while the luminaire 60 is turned on at 6 o'clock in the night, and until the first 4 hours are completed, the PWM signal generating unit 55 continues to output the PWM signal of the 100% duty ratio to the constant current circuit 40. When the luminaire 60 is used until 10 o'clock in the evening, the first 4 hours of the timing unit 51 is correspondingly completed, and the timing unit 51 first issues a clock signal to the control unit 53, while timing the second period from zero, the control unit After receiving the first clock signal, the first control signal is output to the PWM signal generating unit 55, thereby controlling the PWM signal generating unit 55 to convert from a PWM signal outputting a 100% duty ratio to a PWM outputting a 70% duty ratio. The signal, the PWM signal generating unit 55 continues to output a 70% duty cycle PWM signal to the constant current circuit 40 until the timing circuit 51 issues the next clock signal. When the luminaire 60 is used until 2 o'clock in the morning, the second 4 hours of the timing unit 51 is correspondingly completed. Therefore, the timing unit 51 issues a clock signal to the control unit 53 for the second time, and simultaneously enters the cycle from zero again. The timing of the third time period, the control unit 53 receives the second clock signal and outputs the second control signal to the PWM signal generating unit 55, and controls the PWM signal generating unit 55 to output 70% of the 099100499 form number A0101 page 8 / A total of 17 pages 0992001081-0 201125434 匕 PWM 仏 is converted into a 40% duty cycle PWM signal to the constant current circuit 40. [0013] As shown in FIG. 4, the control circuit 50 implements a four-stage control &=^^^ for the luminaire 60, wherein the chronograph unit 51 takes 丨2 hours as a circumstance. The period is divided into four time periods in which the lengths of time are not equal. The first time & is from 6 pm to 7 pm, during which time there are many private cars on the road and 'but because the day is still brighter' light intensity of the luminaire 60 can urinate this to meet the road illuminance; second The time period is from 7:00 pm to the night of the night. Between the two points, the sky is already dark, and there are many pedestrians and vehicles on the road. The third time period is between the consumption (4) and the morning, between 1 and 1 during the time. There are fewer vehicles; the fourth time period is between 1 am and 6 am 'Pedestrians and cars are light and rare during this time period< therefore, the first time period in which the timing unit 51 is set to count in one cycle is 1 hour, the second and third time periods are respectively 3 hours, and the fourth time period is _ hours. When used, the timer unit 51 counts from zero to 1 hour, and the pWM signal generating unit 55 outputs a 70% duty ratio number to the constant current circuit; the timing unit 〇51 counts up to 1 hour to issue the first clock signal. To the control unit 53, the control unit 53 outputs a first control signal to the PWM signal generating unit 55 to control the PWM signal outputting the 100% duty ratio thereof to the constant current circuit 4〇, and the timing unit 51 is cleared to start to enter the second Timing of the time period; when the timing unit 51 counts up to 3 hours, the clock signal is sent to the control unit 53 for the second time. The control unit 53 receives the second clock signal and correspondingly outputs the second control signal to the PW signal generating unit 5. 5, it outputs a PWM signal of 7 〇% duty ratio to the constant current circuit 40, and the timing unit 51 is cleared again to start the timing of the second time period; similarly, when the timing unit 51 counts to 3 small 099100499, the form number Α 0101 Page 9/17 pages 0992001081-0 201125434 The third time the clock signal is sent to the control unit 53, the control unit 53 receives the third clock signal and outputs the third control signal to the PW. Signal generation unit 55 has its output 40 ° / »duty ratio of the PWM signal to the constant current circuit 40, and clears the timer unit 51 starts to enter the fourth period of the timer. During each time period, the PWM signal generating unit 55 always outputs the PWM signal corresponding to the duty cycle until the timing unit 51 sends out the next clock signal, so that the constant current unit 40 can be controlled to be stably in the corresponding time period. A constant current corresponding to the duty cycle of the PWM signal is output to drive the luminaire 60 to emit light of different intensities. [0014] Therefore, the control circuit 50 divides the time required for the luminaire 60 to be continuously used between a corresponding opening and closing to be divided into a plurality of time periods, and fixedly outputs different PWM signals to the constant current circuit 40 through different time periods, thereby The constant current power source 40 can be controlled to output different magnitudes of current to the luminaire 60 in different time periods, so that the luminaire 60 can be illuminated with a specific brightness for a corresponding period of time, so that the luminaire 60 can meet the lighting requirements of different time periods. At the same time, the waste of light energy is reasonably avoided. In addition, since the control circuit 50 controls the brightness of the lamp 60 by outputting different PWM signals to the constant current circuit 40 at different time periods, and then driving the lamp 60 to emit light through the constant current circuit 40, therefore, each time period The magnitude of the current output by the constant current circuit 40 is constant, so that the frequency of the chirp signal pulse can be prevented from being excessively high to damage the service life and operational stability of the LED in the lamp 60. [0015] In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims. 099100499 Form No. A0101 Page 10 of 17 0992001081-0 201125434 [Simple Description of the Drawings] [0016] FIG. 1 is a circuit block diagram of a lighting control system in accordance with an embodiment of the present invention. 2 is a schematic diagram of a first embodiment of a segmented timing control of the control circuit of FIG. 1. 3 is a schematic diagram of a second embodiment of the segmented timing control of the control circuit of FIG. 1. 4 is a schematic diagram of a 曲线 curve of a third embodiment of the segmented timing control of the control circuit of FIG. 1. [Main component symbol description] [0020] Luminaire control system: 10 [0021] AC power supply: 20 [0022] AC/DC constant voltage circuit: 30 [0023] Constant current circuit: 40 [0024] Control circuit: 50 〇v [0025] Timing unit: 51 [0026] Control unit: 5 3 [0027] PWM signal generating unit: 55 [0028] Luminaire: 60 099100499 Form No. A0101 Page 11 / Total 17 Page 0992001081-0