CN102762016A - Dimming system and method of dimmable LED lamp for stage - Google Patents

Dimming system and method of dimmable LED lamp for stage Download PDF

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CN102762016A
CN102762016A CN 201210274096 CN201210274096A CN102762016A CN 102762016 A CN102762016 A CN 102762016A CN 201210274096 CN201210274096 CN 201210274096 CN 201210274096 A CN201210274096 A CN 201210274096A CN 102762016 A CN102762016 A CN 102762016A
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CN 201210274096
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庞成兴
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广州方达舞台设备有限公司
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Abstract

The invention discloses a dimming system and method of a dimmable LED lamp for a stage. The dimming system comprises a signal input and processing unit and a plurality of output channels, wherein each output channel corresponds to an LED lamp with one color, the signal input and processing unit comprises a DC power supply module, a substrate temperature signal module, a microcontroller and a DMX signal module, the DC power supply module is connected with each output channel and provides a load voltage and current to each output channel, the substrate temperature signal module and the DMX signal module are respectively connected with the microcontroller, and the output channels are respectively connected with the microcontroller. The dimming method comprises the step that: the microcontroller receives a DMX input signal of each channel, a feedback signal of a current negative feedback module and a temperature signal of an aluminum substrate, and sends control signals after being processed so as to control output voltages and output currents of the output channels so that the corresponding LED lamps generate light with corresponding colors, therefore, multiple channels realize dimming softness of the stage and the bright colors.

Description

舞台用可调光LED灯的调光系统及方法 Stage with adjustable light dimming system and method for LED lamp

技术领域 FIELD

[0001] 本发明涉及舞台灯光控制技术领域,特别涉及一种舞台用可调光LED灯的调光系统及方法。 [0001] The present invention relates to a stage lighting control, and more particularly, to a stage with an adjustable light dimming system and method of the LED lamp.

背景技术 Background technique

[0002] 在照明领域,LED灯具的使用正在形成燎原之势,LED灯具由于具有长寿命和多色彩的优点,正逐步取代普通照明灯具。 [0002] In the field of lighting, use of LED lamps are formed Liaoyuanzhishi, since the LED lamps having a long lifetime and advantages of the multi-color, is gradually replacing general lighting. 目前,LED灯具的使用处于起步阶段,尤其是在舞台照明领域。 Currently, use of LED lamps in its infancy, especially in the field of stage lighting. 在照明的许多场合,基本都是不调光的,只是把不同色彩的LED灯具简单地排列组合。 In many lighting applications, it is substantially not dimmed, but the different colors of LED lamps are arranged in a simple composition. 城市建筑物上色彩缤纷的LED灯具的大量使用便把建筑物装扮的流光溢彩,璀璨夺目;在城市的道路上,大量采用白光LED灯具后,日常维护量大幅降低,能耗大幅减少;这些都使得LED灯具具有广阔的应用前景。 Building on extensive use of city buildings put colorful dress Ambilight LED lamps, bright; later on the city's roads, extensive use of white LED lamps, routine maintenance is greatly reduced, significantly reducing energy consumption; these have made LED lighting has broad application prospects. 但其缺点是价格太高,维护费用太高,不过随着技术的进步,这些问题正在不断地解决。 But its drawback is the price too high, maintenance costs are too high, but as technology advances, these issues are being constantly addressed.

[0003] 随着创新技术在各行各业的迅速普及,专业舞台灯光领域也迅速地进入技术创新时代。 [0003] With the rapid spread of innovative technologies in all walks of life, professional stage lighting field also quickly entered the era of technological innovation. 由于舞台调光的特殊性,它对灯光的要求很高,如:灯具的调光范围越大越好,对DMX512信号响应越快越好,出光越柔和越好,色彩越多越好,色温范围越大越好,寿命越长越好。 Due to the particularity stage dimming lighting demanding it, such as: the lamp dimming range as large as possible, as fast as possible in response to the DMX512 signal, the better the light softer, better color, color temperature range the bigger the better, life as long as possible. 正是这些要求,使得LED灯具在舞台上很难使用。 It is these requirements, making the LED lamps difficult to use on stage. 按照传统的三基色理论,仅需红绿蓝三种色彩的LED灯珠,即可产生256 X 256 X 256种色彩(灯珠受DMX512协议数据控制,其分辨率是256,当每种色彩LED灯珠占用I个DMX512通道时,三种色彩就占用3个通道);但实践证明,红绿蓝三种色彩的LED灯珠根本混色不出某些色彩段,同时调光感觉也不够柔和。 According to the traditional three-color theory, only three colors of red, green and blue LED lamp, can produce 256 X 256 X 256 colors (light beads by DMX512 protocol control data, and its resolution is 256, when each color LED when the lamp beads occupy the I DMX512 channels, three color channels will occupy 3); but proved three colors red, green and blue LED lamp not simply some color mixing section, while dimming feeling soft enough. 一般LED灯具是由多个发不同色彩光的灯珠组成,而每种灯珠仅发出频带极窄的一种光,不同色彩的灯珠的频谱在频谱图上表现为一个个极窄的频带线,其最大效率发光区极窄(发光波长范围很小),波长极易受外部影响而改变(偏色);正是由于灯珠发光的单纯性,加之大功率调光必须采用PWM方法,会使色彩有所变化,同时所发出光的波长随温度的变化而偏移(即色彩有变化),使得三基色理论很难应用于舞台灯光控制,有一些色彩的光用红绿蓝三基色根本混合不出来;另外,红绿蓝三基色LED灯珠所发出的光与传统的红绿蓝三基色有偏差;而红绿蓝三基色LED灯珠之间的差别是,在相同的电流下,三者的发光效率是不同的,不能同时达到最佳发光效率,每种颜色通道驱动灯珠的数量也影响发光效率,常用恒流驱动芯片都存在这个问题,并且目前国内LED灯具 LED lighting is generally made by a plurality of lights of different colors of light beads, beads and each lamp emits only a very narrow band of light, the different colors of the spectrum of light bead appears as a very narrow frequency bands in a spectrum of FIG. line, which is very narrow maximum efficiency light emitting region (emission wavelength range is small), highly susceptible to external influences wavelength change (color cast); because of simple light emitting beads, combined with high power must PWM dimming method, color will vary, while the wavelength of the emitted light changes with temperature shift (i.e. change of color), so that the three primary colors used in stage lighting control theory is difficult, there are red and green color light and blue color It did not come out mixed; Further, the conventional light red, green and blue color emitted by the LED lamp red, green and blue color deviation; the difference between the light beads RGB three-color LED is at the same current , the luminous efficiency of three different, best luminous efficiency can not be achieved at the same time, the number of color channels of each lamp beads drive also influence the light emission efficiency, constant current driver chips commonly have this problem, and the LED lamps currently 都存在这个问题。 All have this problem.

[0004]目前在舞台应用的LED灯具基本上还是采用三基色灯珠混色的产品,而其中,有些产品的LED灯具在低端闪光问题都没解决,就已经大量的投产应用,在市场上造成不良的影响。 [0004] In the present stage of the application of LED lamps basically three-color lamp beads color mixing of products, of which, some products LED lamps did not solve the problem in the low-end flash, it has been put into operation a large number of applications, resulting in the market adverse effects. 为解决该问题,目前有些厂家开始考虑采用不同基色的多个灯珠,例如采用4基色灯珠,其混色效果相对好一些。 To solve this problem, some manufacturers began to consider the current use of multiple different color lamp beads, for example, a 4-color lamp beads, its blending effect is relatively better. 然而在实际应用中,其色彩还是不够丰富鲜艳,柔和度还是不够,而其根本原因在于其调节系统没有考虑PWM脉宽和电源电压及温度的影响因素等。 In practice, however, it is not enough rich vibrant colors, the softness is not enough, and the fundamental reason lies in its regulation system PWM pulse width and does not consider factors such as temperature and supply voltage. 另外,目前常用于舞台灯光控制的LED调光器采用由输出电感和输出电容组成的简单的LC滤波器,用于减少低端闪光问题,其结构如图3所示,这种简单的LC滤波器在空载或轻载时极容易出现扰动谐波振荡的问题,容易损坏滤波器,调光器也不稳定。 Further LED dimmer, commonly used to control stage lighting simple by the output LC filter composed of inductor and output capacitor, for reducing the low-end flash problem, the structure shown in FIG, this simple LC filter 3 It is very prone to load or light load when the perturbation harmonic oscillations, easy to damage the filter, the dimmer unstable. 正是以上原因,导致多数LED灯具一般使用三个月后,光衰严重,故障率上升,使人们误解认为LED灯具使用寿命大大小于5万小时。 It is these reasons, resulting in the majority of LED lamps generally after three months, the light fades serious, the failure rate rises, so that people misconception that LED lamp life significantly less than 50,000 hours. 但其实,LED灯具的使用寿命是可达到5万小时以上的,只是需要真正解决上述问题。 But in fact, the service life of LED lamps that can reach more than 50,000 hours, but need to really address the issue.

发明内容 SUMMARY

[0005] 本发明的目的在于克服现有技术的不足,提供一种舞台用可调光LED灯的调光系统,该系统不仅能实现精细调光,而且能使色彩丰富鲜艳,使用寿命延长,最大限度的满足专业舞台的需求。 [0005] The object of the present invention is to overcome the disadvantages of the prior art, there is provided a stage with an adjustable light dimming system of LED lamp, the system not only enables fine dimming, rich and bright colors can extend the service life, the maximum to meet the needs of the professional stage.

[0006] 本发明的另一目的在于提供一种通过上述调光系统实现的舞台用可调光LED灯的调光方法。 [0006] Another object of the present invention is to provide a method of dimming the LED lamp light through the dimming stage system implemented with adjustable.

[0007] 本发明的技术方案为:一种舞台用可调光LED灯的调光系统,包括信号输入及处理单元和多个输出通道,每个输出通道对应一种颜色的LED灯;信号输入及处理单元包括直流电源模块、基板温度信号模块、微控制器和DMX信号模块,直流电源模块与各输出通道连接并分别向各输出通道提供负载电流,基板温度信号模块和DMX信号模块分别与微控制器连接,各输出通道也分别与微控制器连接。 [0007] aspect of the present invention is as follows: Stage one kind of light control dimmable LED light system comprising a signal processing unit and a plurality of input and output channels, each output channel corresponding to one color LED lamp; input signal and a processing unit comprising a DC power supply module, the module substrate temperature signal, the microcontroller module and DMX signal, DC power module is connected to each output channel and the output channel are respectively provided to each of the load current, and a module substrate temperature signals respectively micro DMX signal module the controller is connected to the respective output channels are also connected to the microcontroller.

[0008] 所述每个输出通道的结构相同,分别包括受控稳压器、防振荡功率滤波模块、PWM控制信号受控电位器、电压跟随器、电流负反馈模块、大功率管和电流检测模块;受控稳压器分别与直流电源模块和微控制器连接,受控稳压器的输出端与防振荡功率滤波模块连接,PWM控制信号受控电位器与微控制器连接,PWM控制信号受控电位器的输出端与电压跟随器连接,电压跟随器的输出端与大功率管连接,防振荡功率滤波模块的输出端及大功率管的输出端分别与LED灯连接;大功率管还与电流检测模块连接,电流检测模块的输出端与电流负反馈模块连接,电流负反馈模块的输出端分别与电压跟随器和微控制器连接。 [0008] the same for each output channel structure, each comprising a controlled regulator, anti-filtering module oscillation power, the PWM control signal is controlled by the potentiometer, voltage follower, the current negative feedback module, power and current sense module; controlled regulator connected to the DC power supply and a microcontroller, the output of the regulator and the controlled anti-filtering module connected to the power oscillation, the PWM control signal is controlled by a potentiometer connected to the microcontroller, the PWM control signal controlled potentiometer output of the voltage follower is connected to the output terminal of the voltage follower and the power tube is connected to the power output terminal of the oscillation preventing filter module and an output terminal of the power tube are connected to the LED; high-power tube further connected to the current detection module, the output of the current detection module and a current negative feedback module is connected, the current negative feedback module connected to the output terminal of the voltage follower and the microcontroller.

[0009] 所述受控稳压器包括相连接的可控稳压器和第一受控电位器,可控稳压器设于直流电源模块的输出端,第一受控电位器的输出端与防振荡功率滤波模块连接。 [0009] The controlled regulator comprises a controllable voltage regulator is connected to a first and a controlled potentiometer controllable voltage regulator module provided in the DC power supply output terminal, the output terminal of the first controlled potentiometer preventing oscillation power is connected to the filtering module.

[0010] 所述可控稳压器和第一受控电位器之间的连接线路上还设有相连接的肖特基二极管和储能电感,第一受控电位器的输出端设有滤波电容器。 [0010] The controllable connection line between the regulator and the first controlled potentiometer and further provided with a Schottky diode connected to the inductor, the output of the first filter is provided with controlled potentiometer capacitor.

[0011] 所述防振荡功率滤波模块包括相串联的功率电阻和功率电容器,防振荡功率滤波模块与滤波电容器相连接;防振荡功率滤波模块和受控稳压器构成可控谐振阻尼LC输出滤波器。 [0011] The anti-oscillation power module comprises a power filter and a power capacitor a resistor connected in series, the anti-oscillation power filtering module is connected to the filter capacitor; anti-filtering module and the controlled oscillation power regulator configured damping controllable resonant LC output filter device.

[0012] 所述PWM控制信号受控电位器包括相连接的电阻器和第二受控电位器,第二受控电位器两端分别设置电阻器。 [0012] The PWM control signal is controlled by a potentiometer including a resistor and a second controlled potentiometer connected to both ends of the second controlled potentiometer resistor are provided.

[0013] 所述电压跟随器、大功率管、电流检测模块和电流负反馈模块依次连接组成电流负反馈环节;电流负反馈环节的电路中设有两个高速运算放大器和一个功率场效应管,两个高速运算放大器和一个功率场效应管循环连接。 [0013] The voltage follower, power management, the current detection module and a current negative feedback modules are sequentially connected to form a negative current feedback loop; provided with two high-speed operational amplifiers and power in a negative feedback loop circuit current FET, and two high-speed operational amplifiers connected to a power FET cycle.

[0014] 上述系统结构中,微控制器可采用16位以上的耐高温高抗扰无外接晶振的高性能微控制器,配合本系统中高速化的PWM波调制,可实现精细调光,使输出的灯光细腻柔和。 [0014] The above-described system configuration, the microcontroller 16 may be used in the above high-temperature high-performance microcontroller immunity without external oscillator, with the present system the speed of a PWM wave modulation, fine dimming can be achieved, so that delicate soft light output.

[0015] 本发明通过上述调光系统实现一种舞台可调光LED灯的调光方法,包括以下步骤:[0016] (I)信号输入及处理单元中,微控制器分别接收来自DMX信号模块的各输出通道控制信号、来自基板温度信号模块的温度信号和来自各个输出通道中电流负反馈模块的电流信号,然后对各输出通道控制信号、温度信号和电流信号进行处理,对各输出通道输出相应的控制信号; [0015] The present invention is achieved by the dimming system for dimming stage tunable light LED lamp, comprising the steps of: [0016] (I) and the input signal processing unit, the microcontroller receives from block DMX signal each output channel control signal, the temperature signal from the temperature of the substrate the signal module and the current signal from the current negative feedback module each output channel, and the control signal, the temperature signal and the current signal is processed for each output channel, the output for each output channel corresponding control signal;

[0017] (2)来自微控制器的控制信号经过PWM控制信号受控电位器进行分压后,送入电压跟随器,电压跟随器同时接受电流负反馈模块的电流信号;电压跟随器根据电流信号对分压后的控制信号进行进一步处理后,最终的控制信号通过大功率管以负载电流的形式输送至LED灯处;电流检测模块实时检测大功率管输出端的电流,电流负反馈模块将得到的电流信号分别反馈至微控制器和电压跟随器; [0017] (2) a control signal from the microcontroller via a PWM control signal controlled potentiometer for dividing, into a voltage follower, the voltage follower current negative feedback module while receiving a current signal; a voltage follower according to the current after the control signal obtained by dividing the signal for further processing, the final control signal to the LED lights in the form of a load current through the power tube; real-time detection output of current high-power tube current detection module, the resulting current negative feedback module a current signal fed back to the microcontroller and the voltage follower;

[0018] (3)受控稳压器接收来自微控制器的控制信号后,对来自直流电源模块的电压进行稳压处理,经过防振荡功率滤波模块后以负载电压的形式输送至LED灯处。 After [0018] (3) controlled regulator receives control signals from the microcontroller, the voltage from the DC power supply is regulated process, after filtering module oscillation preventing power delivered to the LED lights in the form of a load voltage .

[0019] 本发明相对于现有技术,具有以下有益效果: [0019] The present invention with respect to the prior art, has the following advantages:

[0020] 本调光系统是在现有调光系统的基础上,通过采用微调多种色彩的灯珠的控制信号和受控稳压器来补偿因温度变化及PWM占空比变化造成的色彩偏移,从而实现细腻柔和的精细调光,同时方便地实现色彩丰富鲜艳。 [0020] The present color light control system is based on conventional dimming system, compensated for by using a plurality of colors of light beads trimming control signals and regulator controlled by a temperature change caused by the change in the PWM duty cycle and offset, thereby achieving a fine delicate soft dimming, while conveniently achieved rich vibrant colors. 除可以应用在舞台外,还可以广泛地应用于其他场合。 In addition to be applied to the stage, but also can be widely applied to other applications.

[0021] 本调光系统通过设置多个输出通道,可连接多种不同色彩的LED灯珠(实践证明,七种色彩可使输出光达到最佳),由于不同色彩的LED灯珠的工作电压(或LED灯珠正向压降)不同,而且其发光的波长会随温度上升向紫端偏移,并且PWM脉宽变化,颜色也有偏移变化,因而每种色彩LED灯珠的输出通道设置受控稳压器及防振荡功率滤波模块,使各种色彩的LED灯珠都可适用相同的直流电源输入,同时在相同的控制信号下发出相同比例强度的光,矫正了偏移的波长。 [0021] The present system by providing a plurality of dimmer output channels can be connected to a plurality of different colors of LED lamps (proven seven colors can best light output), the operating voltage since the different colors of LED lamp (or LED lamp forward voltage drop) different, and its emission wavelength shift with temperature rise to the purple end, and the PWM pulse width changes, the color offset changes, and thus each color LED lamp set output channel controlled oscillation power regulators and anti-filtering module, so that various colors of the LED lamp may be suitable for the same DC input power source, while the same ratio of intensity of light emitted at the same control signal, a wavelength shift correction. 防振荡功率滤波模块的采用,使灯珠避免了高频振荡过电流的冲击,延长灯珠的使用寿命;同时,也延长了直流电源和整个控制系统的寿命;从而延长了灯具的使用寿命。 Filtering with anti-oscillation power module, the lamp life of beads to avoid high-frequency oscillating current of a shock, to extend the lamp beads; while also extending the life of the DC power supply and the entire control system; thus extending the life of the lamp.

[0022] 由于本调光系统与现有调光系统相比,可实现更多色彩LED灯珠的混色,因此混色后舞台灯光的色彩更丰富多彩;同时,采用高性能微控制器对各路色彩的LED灯珠进行调光,使LED灯输出的灯光更为柔和细腻。 [0022] As the dimming system compared with the conventional dimmer system can achieve more color mixing LED lamp, so after mixing more colorful the color of the stage lights; Meanwhile, high-performance microcontroller brightest color LED lamp dimming, the LED lamp so that the light output is more soft and delicate.

[0023] 本调光系统与传统LED灯具的最大区别在于在于微控制器的控制,微控制器接收所有通道的DMX输入控制信号及电流负反馈信号和铝基板的温度信号,根据采用的方案经过自学习及最优化处理,以最佳控制策略(包括多种自动控制方法,依据实际情况选用最适合的)对各个通道产生不同的PWM控制信号,并且调节受控电位器实现PWM恒流驱动的微调,同时对受控稳压器调整改变输出电压,使得每种色彩的LED灯珠在正常受DMX控制之夕卜,使灯珠随PWM变化偏色和温度变化偏色及多种灯珠混色偏色得到有效补偿。 [0023] The maximum difference between the present system and the traditional dimmer LED lamp is characterized in that the control of the microcontroller, the microcontroller receives all channels DMX input control signal and a current negative feedback signal and the temperature signal of the aluminum substrate, in accordance with the program through the use of self-learning and optimization process, optimal control strategy (including a variety of automatic control method, based on the actual selection of the most appropriate case) generate different PWM control signals for each channel, and adjust the PWM controlled potentiometer constant current drive trimming, while the controlled adjustment of the regulator changes the output voltage, so that each color of the LED lamp in normal subjects Bu Xi DMX control of the PWM with lamp beads changes and temperature changes cast cast more light beads and mixing cast effective remedy. 同时,另外增加了不同颜色通道的协调联动机制。 Also, an additional linkage mechanism coordinating the different color channels.

附图说明 BRIEF DESCRIPTION

[0024] 图I为本调光系统控制单个输出通道时的结构示意图。 [0024] Figure I a schematic structural view of an optical system controlling a single output channel of the present tone.

[0025] 图2为本调光系统控制单个输出通道时的电路原理示意图。 [0025] FIG. 2 is a schematic view of the principle of the system control circuit when the light output of the single tone channel.

[0026] 图3为传统LC滤波器的原理示意图。 [0026] FIG. 3 is a simplified schematic of a conventional LC filter. [0027] 图4为本调光系统中可控谐振阻尼LC输出滤波器的原理示意图。 [0027] FIG. 4 is a schematic diagram of a dimming system damping principle controllable resonant LC output filter.

具体实施方式 Detailed ways

[0028] 下面结合实施例及附图,对本发明作进一步的详细说明,但本发明的实施方式不限于此。 [0028] The following embodiments and the accompanying drawings in conjunction with embodiments of the present invention will be further described in detail, but the embodiment of the present invention is not limited thereto.

[0029] 实施例 [0029] Example

[0030] 本实施例一种舞台用可调光LED灯的调光系统,包括信号输入及处理单元和多个输出通道,每个输出通道对应一种颜色的LED灯;信号输入及处理单元包括直流电源模块、基板温度信号模块、微控制器和DMX信号模块,直流电源模块与各输出通道连接并分别向各输出通道提供负载电流,基板温度信号模块和DMX信号模块分别与微控制器连接,各输出通道也分别与微控制器连接。 [0030] The present embodiment of a stage light control system dimmable LED lamp includes a signal processing unit and a plurality of input and output channels, each output channel corresponding to one color LED lamp embodiment; processing unit comprises a signal input and DC power module, the module substrate temperature signal, the microcontroller module and DMX signal, DC power module is connected to each output channel and the output channel are respectively provided to each of the load current, and a substrate temperature signal DMX signal module are connected to the microcontroller module, each output channel is also connected to the microcontroller. [0031] 每个输出通道的结构相同,当本调光系统控制单个输出通道时,其结构如图I所示,输出通道包括受控稳压器、防振荡功率滤波模块、PWM控制信号受控电位器、电压跟随器、电流负反馈模块、大功率管和电流检测模块;受控稳压器分别与直流电源模块和微控制器连接,受控稳压器的输出端与防振荡功率滤波模块连接,PWM控制信号受控电位器与微控制器连接,PWM控制信号受控电位器的输出端与电压跟随器连接,电压跟随器的输出端与大功率管连接,防振荡功率滤波模块的输出端及大功率管的输出端分别与LED灯连接;大功率管还与电流检测模块连接,电流检测模块的输出端与电流负反馈模块连接,电流负反馈模块的输出端分别与电压跟随器和微控制器连接。 [0031] the same for each output channel structure, when the present control system dimming a single output channel, the structure shown in FIG. I, the output channel comprising a controlled regulator, anti-filtering module oscillation power, the PWM control signal is controlled potentiometer, voltage follower, the current negative feedback module, power management and a current detection module; controlled regulator connected to the DC power supply and a microcontroller, the output of the regulator and the controlled oscillation power anti filtering module connection, the PWM control signal is controlled by a potentiometer connected to the microcontroller, the PWM control signal is controlled by the potentiometer output terminal of the voltage follower is connected to the output terminal of the voltage follower is connected with the high-power tube, preventing the oscillation output power of the filter module and the power output side are connected to the tube LED lights; high-power tube further connected to the current detection module, a current detection module and a current output terminal connected to the negative feedback module, the module current negative feedback output terminal of the voltage follower, respectively, and The microcontroller is connected.

[0032] 其中,受控稳压器的输入端连接直流电源模块,受控稳压器的受控端连接微控制器,受控稳压器的输出端连接防振荡功率滤波模块;防振荡功率滤波模块的输出端连接LED灯的高端输入(即高电压侧);PWM控制信号受控电位器的输入端连接微控制器的PWM输出端,PWM控制信号受控电位器的受控输入端连接微控制器的控制输出端,PWM控制信号受控电位器的输出端连接电压跟随器的正输入端;电压跟随器的负输入端连接电流负反馈模块的输出端,电压跟随器的输出端连接大功率管的输入端;大功率管的输出端连接LED灯的低端输入(即低电压侧),大功率管的另一输出端连接电流检测模块的输入端;电流检测模块的输出端连接电流负反馈模块的输入端;电流负反馈模块的输出端还连接到微控制器的输入端。 [0032] wherein the regulator input terminal is connected to a controlled DC power supply, the controlled terminal connected microcontroller controlled regulator, controlled regulator connected to the output of the chattering preventing power filtering module; anti-oscillation power filtering module connected to the output terminal of the LED lamp input end (i.e., the high-voltage side); controlled input terminal of the PWM output terminal connected to the microcontroller, the PWM control signal controlled potentiometer PWM control signal is connected to the controlled potentiometer control output of the microcontroller, PWM outputs, a control signal terminal connected to the controlled potentiometer voltage follower positive input; the negative input of the voltage follower is connected to the negative current feedback module output terminal, the output terminal of the voltage follower are connected input power tube; power output of the LED lamp tube is connected the lower end of input (i.e., the low voltage side), connected to an input terminal of the current detection module power output terminal of the other tube; output of the current detection module are connected current feedback module of the negative input terminal; current negative feedback module output terminal is also connected to an input of the microcontroller.

[0033] 如图2所示,受控稳压器包括相连接的可控稳压器Ul和第一受控电位器P2,可控稳压器设于直流电源模块的输出端,第一受控电位器的输出端与防振荡功率滤波模块连接;可控稳压器和第一受控电位器之间的连接线路上还设有相连接的肖特基二极管Dl和储能电感L2,第一受控电位器P2的输出端设有滤波电容器C2 ;第一受控电位器是一个受微控制器控制阻值的电位器,其作用是在微控制器控制下,使可控稳压器产生合适的输出电压。 [0033] As illustrated, the controlled regulator comprises a controllable voltage regulator Ul and a first controlled potentiometer P2 is connected to the controllable voltage regulator 2 is provided on the DC power supply output terminal, a first receiving the output of the potentiometer and the prevention and control oscillation power filter module connector; controllable connection line between the regulator and the first controlled potentiometer and further provided with a Schottky diode Dl is connected to the inductor L2, the a controlled output terminal of the potentiometer P2 is provided with a filter capacitor C2; a first potential is controlled by a microcontroller to control the resistance of the potentiometer, which is acting under the control of the microcontroller, so that a controllable voltage regulator generating appropriate output voltage. 防振荡功率滤波模块包括相串联的功率电阻Rl和功率电容器C3,防振荡功率滤波模块与滤波电容器相连接,防振荡功率滤波模块一端连接受控稳压器输出到LED灯的电源线上,另一端连接到地线上,其作用是在有较大功率电感和电容的情况下、在轻载或无载时使整个系统稳定不产生振荡,并且输出电压更稳定;防振荡功率滤波模块和受控稳压器构成可控谐振阻尼LC输出滤波器。 Preventing oscillation power module includes a filter coupled in series power resistor Rl and power capacitors C3, preventing oscillation power filtering module is connected to the filter capacitor, the oscillation preventing filter module power regulator output end connected to a controlled power supply line of the LED lamp, the other one end connected to the ground line, and its role in the larger power inductor and capacitor case, the entire system at light load or no load when no stable oscillation, and the output voltage is more stable; anti-filtering module and receiving the oscillation power controllable resonant regulator controller configured damped LC output filter. PWM控制信号受控电位器包括相连接的电阻器RP1、RP2和第二受控电位器P1,第二受控电位器两端分别设置电阻器;PWM控制信号受控电位器把较大幅度的PWM控制信号分压成较小幅度的PWM控制信号,以输出到电压跟随器中;第二受控电位器是一个受微控制器控制阻值的电位器,由它分压出合适幅度的PWM控制信号通过电流负反馈模块的稳定环节得到对应的负载(LED灯)电流值,也就是说,LED灯的电流值是受微控制器控制的。 Controlled PWM control signal comprises a potentiometer connected to a resistor RP1, RP2, and a second controlled potentiometer P1, the second ends are respectively controlled potentiometer setting resistor; a PWM control signal to the controlled potentiometer more substantial dividing the PWM control signal to the PWM control signal of a smaller amplitude to output to the voltage follower; a second potentiometer is controlled by a microcontroller to control the resistance of the potentiometer, from which the magnitude of the partial pressure of a suitable PWM current negative feedback control signal module stabilizing give the corresponding load (LED lamp) current, i.e., the current value of the LED lamp is controlled by a microcontroller. 电压跟随器、大功率管、电流检测模块和电流负反馈模块依次连接组成电流负反馈环节;电流负反馈环节的电路中设有两个高速运算放大器AMPA和AMPB和一个功率场效应管M1,两个高速运算放大器和一个功率场效应管循环连接。 A voltage follower, power management, the current detection module and a current negative feedback modules are sequentially connected to form a negative current feedback loop; current negative feedback loop circuit is provided with two high-speed operational amplifiers AMPA and AMPB and a power FET M1, two and a high-speed operational amplifiers connected loop power FET. 电流负反馈环节使得检测到的电流(其实就是负载LED灯的电流)总是跟随PWM控制信号及受控电位器输出的给定PWM幅度而变化,LED灯上的电流稳定了,受LED灯变化情况的影响很小,则LED灯的发光波长就稳定,即色彩稳定,它只随控制信号的变化而变化,也就是说,LED灯的负载电流值是受微控制器控制的。 Given the magnitude PWM current negative feedback loop is changed so that the current is detected (in fact, the LED lamp load current) is always followed by a PWM control signal and the controlled output of the potentiometer, the LED lamp current stabilized, the LED changes by Effects of the case is small, the LED light emission wavelength is stabilized, i.e., color stability, it only varies with changes in the control signal, i.e., the LED lamp load current value is controlled by the microcontroller.

[0034] 上述系统结构中,微控制器可采用16位以上的耐高温高抗扰无外接晶振的高性能微控制器,配合本系统中高速化的PWM波调制,可实现精细调光,使输出的灯光细腻柔和。 [0034] The above-described system configuration, the microcontroller 16 may be used in the above high-temperature high-performance microcontroller immunity without external oscillator, with the present system the speed of a PWM wave modulation, fine dimming can be achieved, so that delicate soft light output.

[0035] 其中,本实施例所采用的可控谐振阻尼LC输出滤波器如图4所示,由受控稳压器的储能电感器L2及滤波电容器C2和防振荡功率滤波器的功率电阻Rl和功率电容器C3组成;与传统滤波器相比较,可有效地防止了空载和轻载时的扰动谐波振荡现象,使受控稳压器可以空载运行。 [0035] wherein the controllable resonant damped LC output filter embodiment employed in the present embodiment, the regulator controlled by the energy storage inductor L2 and the capacitor C2 and the filter filters the oscillation preventing power resistor power FIG 4 Rl and the power condenser C3; comparison with the conventional filter, the load can be effectively prevented and light disturbance harmonic oscillation phenomenon when the carrier, so that the regulator can be controlled idling.

[0036] 传统的LC输出滤波器如图3所示,其原理是: [0036] The conventional LC output filter shown in Figure 3, the principle is:

[0037] 假设负载为&,系统中的电感器L2、电容器(:2、负载&的复阻抗分别为sL2、1/sC2、&,那么线路输出电压对滤波器前端电压的传递函数为: [0037] & assumed load, the system inductor L2, a capacitor (: 2, the complex impedance of the load are & sL2,1 / sC2, &, then the front end of the line voltage the output voltage of the filter transfer function is:

Uo(s) IIsCJIRl rl Uo (s) IIsCJIRl rl

0038 G(S) — I/i(s) ~ SL2 +(l/.vC, HR,) S1 Rd + ' +rl ; 0038 G (S) - I / i (s) ~ SL2 + (l / .vC, HR,) S1 Rd + '+ rl;

[0039] 其有效阻尼比:| = . [0039] the effective damping ratio: | =.

IR,, IR ,,

,,_ I ,, _ I

[0040]谐振峰值 v// - 。 [0040] The resonance peak v // -.

[0041 ] 以上公式中,当负载电阻& —⑴时,有效阻尼比^ — 0、谐振峰值Mp —⑴。 [0041] In the above formula, when the load resistance & -⑴, effective damping ratio ^ - 0, resonant peak Mp -⑴. 对于二阶系统,Mp表征系统的相对稳定性,当I. 0<MP<1. 4、即0. 4< I〈O. 7时,可获得满意的瞬态性能;但当MP>1. 5时,阶跃响应将出现数次超调,通常Mp越大,瞬态超调量也越大;当Mp很 . The relative stability of the second order system, the system characterized Mp, when I. 0 <MP <1 4, i.e., 0. 4 <I <O 7 are obtained when satisfactory transient performance; but MP> 1. 5, step response overshoot appears several times, generally greater Mp, transient overshoot greater; when Mp is

大时,如果系统受到谐振频率(UnW-2f (空载或轻载时的谐振频率与无阻尼自然谐振频率《 n很接近)处附近的干扰信号作用,LC滤波器将不能对其进行有效抑制和滤除,输出端便有较大的扰动分量,可能造成严重后果。 Is large, the resonance frequency at the resonance frequency if the system is subjected to (UnW-2f (load or light load with the resonant frequency of the undamped natural "n very close to) the interference signals acting at the vicinity of, the LC filter can not be effectively suppressed and filtering the output end there will be a large disturbance component, could have serious consequences.

[0°42]实际上,传递_■表示为邮)% +1, [0 ° 42] In fact, as represented by postal transfer _ ■) + 1%,

[0043] 当负载电阻Rl—①时,化简为:G(sj = v2r ]{ +1, [0043] When the load resistance Rl-①, reduces to: G (sj = v2r] {+1,

[0044] 显然,这就是无阻尼LC振荡器,S2= (j2 fr)2=-l/(L2C2),谐振频率为 [0044] Obviously, this is an LC oscillator undamped, S2 = (j2 fr) 2 = -l / (L2C2), the resonant frequency is

Figure CN102762016AD00091

谐振时,有很小干扰信号输入Ui(fr),G(fr)—谐振峰值 At resonance, there is little interference signal input Ui (fr), G (fr) - resonance peak

[0045] 而本实施例所采用的可控谐振阻尼LC输出滤波器,其原理是: [0045] The controllably damped resonant LC output filter employed in this embodiment, the principle is:

[0046] 假设负载为&,系统中的输出电感L2、电容C2、谐振阻尼电阻R1、谐振阻尼电容C3、负载&的复阻抗分别为sL2、l/sC2、Rl、l/sC3、&,那么线路中输出电压对滤波器前端电压的传递函数为: [0046] Assuming the load is & output inductor system L2, capacitor C2, a resonance damping resistor R1, a resonance damping capacitor C3, load & complex impedance are sL2, l / sC2, Rl, l / sC3, &, then line voltage to the output voltage of the front end of the filter transfer function is:

[0047] [0047]

Figure CN102762016AD00092

[0049] [0049]

[0050] 写出s的分母多项式方程: [0050] s denominator polynomial equations written:

[0051 ] [0051]

Figure CN102762016AD00093

[0052] 根据劳斯稳定判据,可以将多项式的系数排列成下列形式的行和列(劳斯阵列): [0052] The Rous stability criterion, coefficients of the polynomial may be arranged in the form of rows and columns (Rouse Array):

Figure CN102762016AD00094

[0054] 系统稳定的一个条件是劳斯阵列第一列中的各项都为正号,因而 [0054] A stable system condition is a first column of the array Rolls are positive numbers, and thus

Figure CN102762016AD00095

必须成立,这个不等式成立的前提是 Must be established on the premise that this inequality

Figure CN102762016AD00096

,当空载时,第一项为零,第二项不可能为零,因此这个条件恒成立。 When idling, the first term is zero, the second term can not be zero, so the constant condition is established.

[0055] 系统稳定的另一个条件是分母多项式s方程的全部系数都是正值,这个条件也恒成立。 [0055] Another condition is the stability of the system all the coefficients of the denominator polynomial equation s are positive, the conditions established constant. 因而,系统的所有极点都位于左半s平面,系统稳定。 Thus, all the poles of the system are located in the left half of the s-plane, the system is stable. 从传递函数可见,系统多了一个左半平面的零点,根轨迹向左移,系统稳定性提高。 The transfer function can be seen, a left half plane zero from multiple systems, the root locus to the left, the system stability is improved.

[0056] 可以证明,当C3=C2且为原C2值的一半,L2不变 [0056] It can be shown as C3 = C2 and C2 half the original value, L2 unchanged

Figure CN102762016AD00097

即可以得至!J满意的效果,谐振频率为 That can be obtained through! J satisfactory results, the resonant frequency is

Figure CN102762016AD00101

若谐振幅度电压有效值Un,则R1损耗的功率 If the resonance amplitude RMS voltage Un, the power loss of the R1

Figure CN102762016AD00102

由公式可见随谐振幅度的增加,R1对谐振频率的损耗衰减是很 With increasing resonance amplitude, R1 loss of resonance frequency is attenuated by the formula visible

大的。 big. 因此当滤波器采用普通直流电源,即其输出电压有效值为48V时,R1对有用功率的损耗可以忽略不计。 Thus when the filter ordinary DC power supply, i.e., when the effective value of the output voltage is 48V, R1 loss of useful power is negligible. 本实施例假设R1=1W,C2=10uF,高频振荡电压假设为IV,高频振荡频率为200K (开关电源一般在此值之上),则R1对高频振荡功率的损耗为0. 86W,可见对高频振荡的衰减是很大的。 The present embodiment assumes that R1 = 1W, C2 = 10uF, high frequency oscillating voltage is assumed to IV, the high-frequency oscillation frequency is 200K (generally a switching power supply above this value), then the loss of the high frequency oscillation power of R1 is 0. 86W , visible attenuation of high frequency oscillation is great. 直流输出电压为48V时,R1功率的损耗为零。 When the DC output voltage of 48V, the power consumption is zero R1.

[0057] 本实施例通过上述调光系统实现一种舞台可调光LED灯的调光方法,包括以下步骤: [0057] Examples of the present embodiment to realize a dimming stage tunable light LED lamp, comprising the steps of the above-described dimming system:

[0058] (I)信号输入及处理单元中,微控制器分别接收来自DMX信号模块的各输出通道信号、来自基板温度信号模块的温度信号和来自各个输出通道中电流负反馈模块的电流信号,然后对各输出通道信号、温度信号和电流信号进行处理,对各输出通道输出相应的控制信号; [0058] (I) and the input signal processing unit, the microcontroller receives the respective output channel signal from the DMX signal module, the substrate temperature from the temperature signal and a current signal module output channel signals from the respective current negative feedback module, then for each output channel signal, the temperature signal and the current signal processing, outputs a corresponding control signal for each output channel;

[0059] (2)来自微控制器的控制信号经过PWM控制信号受控电位器进行分压后,送入电压跟随器,电压跟随器同时接受电流负反馈模块的电流信号;电压跟随器根据电流信号对分压后的控制信号进行进一步处理后,最终的控制信号通过大功率管输送至LED灯处;电流检测模块实时检测大功率管输出端的电流,电流负反馈模块将得到的电流信号分别反馈至微控制器和电压跟随器; [0059] (2) a control signal from the microcontroller via a PWM control signal controlled potentiometer for dividing, into a voltage follower, the voltage follower current negative feedback module while receiving a current signal; a voltage follower according to the current after the control signal obtained by dividing the signal for further processing, the final control signal to the LED lamp through the power tube; tube current signal detected in real time power output terminal of the current detection module current, the current negative feedback are obtained feedback module to the microcontroller and the voltage follower;

[0060] (3)受控稳压器接收来自微控制器的控制信号后,对来自直流电源模块的电流进行稳压处理,经过防振荡功率滤波模块后输送至LED灯处。 After [0060] (3) controlled regulator receives control signals from the microcontroller, the current from the DC power supply is regulated treatment, delivered to the LED lamp after the anti-oscillation power filter module.

[0061] 该过程中,微控制器接收所有输出通道的DMX输入信号、电流负反馈模块的反馈信号和铝基板的温度信号,经过微控制器程序自学习及最优化处理后,以最佳控制策略对各个通道产生不同的PWM控制信号并且调节受控电位器以控制负载电流,同时对受控稳压器调整以输出合适的输出电压。 After [0061] the process, the microcontroller receives all output channels DMX signal input, a negative current feedback module and the feedback signal temperature of the aluminum substrate, through the micro-controller program self-learning and optimization process, optimal control different strategies generated PWM control signal for each channel and adjusts the controlled potentiometer to control the load current, while adjusting the regulator of the controlled output voltage to a suitable output. 多个通道LED灯分别接收相应的PWM脉宽调制信号,同时受控于相应的稳压器,从而多通道共同实现适合舞台的调光柔和度及丰富鲜艳的色彩。 A plurality of LED lamps receive channels corresponding PWM pulse width modulated signal, and controlled by the respective regulator, so that appropriate stage together to achieve a multi-channel dimmer softness and rich bright colors. 本实施例中,多个不同基色灯珠混色采用经验数据表格与线性插值算法相结合的混色方法,同时对混色数据都要根据温度和PWM的占空比通过调节受控稳压器的输出电压来补偿受到影响的色彩,即波长;(不全采用经验数据表格的原因是,当有7种基色时,每种都受控于DMX512信号有256种PWM数据,则总数据将达到256 X 256 X 256 X 256 X 256 X 256 X 256,这还没有计算每种数据要根据温度和PWM的占空比通过调节受控稳压器的输出电压来补偿受到影响的色彩即波长的计算量;因而全采用经验数据表格是不可能实现的。) The output voltage of the present embodiment, a plurality of different color mixing method using the mixing lamp beads empirical data tables and linear interpolation algorithm combining, while the temperature and mixing data needs by adjusting the duty cycle of the PWM controlled regulator to compensate affected colors, i.e. wavelength; (incomplete empirical data table because, when there are seven primary colors, each of which are controlled by the PWM DMX512 signal there are 256 data, the data will always reach 256 X 256 X 256 X 256 X 256 X 256 X 256, which has not been calculated for each data to calculate the compensation amount to be affected by adjusting the wavelength of color that is controlled regulator output voltage depending on the temperature and the PWM duty cycle; therefore the whole the use of empirical data table is not possible.)

[0062] 此过程中,微控制器程序,接收所有通道的DMX输入信号及电流负反馈信号和铝基板的温度信号,根据采用的方案经过自学习及最优化处理,以最佳控制策略对各个通道产生不同的PWM控制信号并且调节受控电位器实现PWM恒流驱动的微调,同时对受控稳压器调整改变输出电压。 [0062] In this process, the micro-controller program, receiving all channels DMX input signal and the temperature signal current negative feedback signal and the aluminum substrate, in accordance with the program through the use of self-learning and optimization process, optimal control strategy for each generate different channels and adjust the PWM control signal for PWM-controlled constant current drive potentiometer trim, while the controlled adjustment of changing the output voltage regulator. 使得每种色彩的LED灯珠在正常受DMX控制之外,灯珠随PWM变化偏色和温度变化偏色,使多种灯珠混色偏色得到有效补偿。 Such that each color LED lamp is outside the normal controlled by DMX, with lamp beads PWM changes and temperature changes color cast cast the cast more light bead mixing an effective remedy. 同时,还增加了不同颜色通道的协调机制。 At the same time, also increased the coordination mechanism different color channels. [0063] 如图2所示,来自微控制器的控制信号PWM3经过由电阻器RP1、RP2和第二受控电位器Pl构成的分压网络后,信号送入高速运算放大器AMPA的正输入端,而由检测电阻R3检测到受高速运算放大器AMPA的输出端控制的功率场效应管Ml产生的电流信号,经过由高速运算放大器AMPB和电阻器R4、R6、R7构成电流负反馈的变换放大后,信号负反馈到高速运算放大器AMPA的负输入端,使高速运算放大器AMPA的负输入端始终跟随正输入端的信号变化而变化;正是这个由AMPA,AMPB,M1和R3、R4、R5、R6、R7等构成的负反馈,使得Ml控制的负载电流非常稳定,它仅仅受控于微控制器产生的PWM3及微控制器控制的第二受控电位器Pl。 [0063] As shown, a control signal from the microcontroller via PWM3 by resistors RP1 and RP2 after the second voltage divider network controlled potentiometer Pl constituted of AMPA signal into the high-speed operational amplifier, the positive input terminal 2 , while the resistor R3 is detected by the detection signal by the current output terminal of the operational amplifier AMPA high-speed power control FET Ml generated by the high speed operational amplifier through AMPB and resistors R4, R6, R7 constitute a current negative feedback transimpedance amplifier , the signal negative feedback to the negative input terminal of the high-speed operational amplifiers AMPA, so that high-speed operational amplifiers AMPA negative input terminal always follow a signal change of the positive input terminal of the change; is that of AMPA, AMPB, M1, and R3, R4, R5, R6 , R7 negative feedback configuration, etc., so that the load current is very stable control Ml, which is only controlled by a second controlled potentiometer Pl is generated by the microcontroller and microcontroller PWM3 control. 输入电源VIN经过由可控稳压器Ul及外围电阻R2,肖特基二极管Dl,电容器Cl、C2、C4、C5、C6,储能电感L2和第一受控电位器P2构成受控稳压器后,输出电压经过由电阻Rl和电容C3构成的防振荡功率滤波器,送到LED灯的高输入端,这个输出电压只受控于第一受控电位器P2,在第一受控电位器P2的值一定的情况下,其输出电压是非常稳定的。 Power source VIN through input by a controllable voltage regulator Ul and external resistor R2, a Schottky diode Dl, capacitor Cl, C2, C4, C5, C6, inductor L2 and P2 constitutes a first controlled potentiometer controlled regulator after the output voltages from the power filter through the oscillation preventing capacitor C3 and a resistor Rl configuration, the input port to the LED lamp, the output voltage is controlled by only the first controlled potentiometer P2, the potential of the first controlled under certain circumstances P2 is the value of the output voltage is very stable. 由储能电感L2,滤波电容器C2和功率电阻Rl和功率电容器C3共同构成了可控谐振阻尼LC输出滤波器,使LED供电电压不受外界干扰,始终保持稳定状态,它只第一受控电位器P2的影响。 The inductor L2, filter capacitor C2 and power resistor Rl and the capacitor C3 constitute a power controllable resonant damped LC output filter, the LED supply voltage from outside interference, it has remained stable state, only the first controlled potential the impact is P2. 由LEDl和LED2构成同一色彩的LED灯的低端是一个稳定电流的环节,高端是一个稳定电压的环节,因而LED灯上的发光将是非常稳定的。 Consists of the same color LEDl and LED2 LED lamp is a low-end current stable link, a link is stable high voltage, thereby emitting the LED will be very stable. LED灯上的发光只受微控制器控制,不受外界及线路结构的影响。 LED light emission only by the micro-controller, and is not affected by the outside line structure.

[0064] 本实施例中,第一受控电位器和第二受控电位器可以是受微控制器控制的数字电位器,也可以是微控制器控制的由CPLD (复杂可编程逻辑器件)、GAL (门阵列逻辑)和电阻网络构成的受控电阻或者其他受微控制器控制的可变电阻形态。 [0064] In this embodiment, the first and second potentiometers controlled potentiometer may be controlled by a microcontroller-controlled digital potentiometer, may be controlled by a microcontroller CPLD (Complex Programmable Logic Device) , the GAL controllable resistor (gate array logic) and a resistor network consisting of a variable resistor or other form of control by the microcontroller. 当然,优选方案为数字电位器,因为它专一且更简单可靠。 Of course, the preferred embodiment is a digital potentiometer, simple and reliable because it is more specific. 如果灯具电流在IA以下接近1A,则储能电感L2可选IOOuH的IA电流的铁氧体电感,肖特基二极管Dl可选择IA的1N58XX系列,可控稳压器Ul可选IA器件LM50XX系列或LM250XX系列,大功率管优选合适电流和合适电压的功率场效应管MOSFET,电流检测电阻优选IQ /2W的电阻器。 If the lamp current is 1A in close IA or less, the inductor L2 optionally IOOuH ferrite inductor currents IA, IA selectable Schottky diode Dl 1N58XX series of controllable voltage regulator Ul optional device LM50XX family IA LM250XX or series, preferably high-power tube suitable current and a suitable voltage the MOSFET power FET, a current detection resistor preferably IQ / 2W resistor.

[0065] 如上所述,便可较好地实现本发明,上述实施例仅为本发明的较佳实施例,并非用来限定本发明的实施范围;即凡依本发明内容所作的均等变化与修饰,都为本发明权利要求所要求保护的范围所涵盖。 [0065] As described above, the present invention can be preferably implemented, the above-described embodiments are merely preferred embodiments of the present invention, not intended to limit the scope of embodiments of the present invention; i.e., where the equivalent changes made under this invention with the content of modified, the scope of the claims are encompassed by the present invention as claimed.

Claims (8)

  1. 1.舞台用可调光LED灯的调光系统,其特征在于,包括信号输入及处理单元和多个输出通道,每个输出通道对应一种颜色的LED灯;信号输入及处理单元包括直流电源模块、基板温度信号模块、微控制器和DMX信号模块,直流电源模块与各输出通道连接并分别向各输出通道提供负载电流,基板温度信号模块和DMX信号模块分别与微控制器连接,各输出通道也分别与微控制器连接。 Stage 1, characterized in that the light control dimmable LED light system comprising a signal processing unit and a plurality of input and output channels, each output channel corresponding to one color LED lamp; and processing the input signal includes a DC power supply unit module, the substrate temperature signal module, the module microcontroller and DMX signal, the DC power supply module is connected to each output channel and the output channel are respectively provided to each of the load current, and a substrate temperature signal DMX signal module are connected to the microcontroller module, each output channels are also connected to the microcontroller.
  2. 2.根据权利要求I所述舞台可调光LED灯的调光系统,其特征在于,所述每个输出通道的结构相同,分别包括受控稳压器、防振荡功率滤波模块、PWM控制信号受控电位器、电压跟随器、电流负反馈模块、大功率管和电流检测模块;受控稳压器分别与直流电源模块和微控制器连接,受控稳压器的输出端与防振荡功率滤波模块连接,PWM控制信号受控电位器与微控制器连接,PWM控制信号受控电位器的输出端与电压跟随器连接,电压跟随器的输出端与大功率管连接,防振荡功率滤波模块的输出端及大功率管的输出端分别与LED灯连接•'大功率管还与电流检测模块连接,电流检测模块的输出端与电流负反馈模块连接,电流负反馈模块的输出端分别与电压跟随器和微控制器连接。 2. I claim the stage tunable light LED lamp dimming system, characterized in that the same structure for each output channel, each comprising a controlled regulator, anti-filtering module oscillation power, the PWM control signal controlled potentiometer, voltage follower, the current negative feedback module, power management and a current detection module; controlled regulator connected to the DC power supply and a microcontroller, the output of the regulator and anti controlled oscillation power filtering module is connected to the PWM control signal is controlled by a potentiometer connected to the microcontroller, the PWM control signal is controlled by the potentiometer output terminal of the voltage follower is connected to the output terminal of the voltage follower is connected with the high-power tube, preventing oscillation power filtering module an output terminal and an output terminal of the power tube are respectively connected to LED lamp • 'power tube further connected to the current detection module, the output of the current detection module and a current negative feedback module connected to the module the current negative feedback voltage output terminal, respectively and a microcontroller coupled to the follower.
  3. 3.根据权利要求2所述舞台可调光LED灯的调光系统,其特征在于,所述受控稳压器包括相连接的可控稳压器和第一受控电位器,可控稳压器设于直流电源模块的输出端,第一受控电位器的输出端与防振荡功率滤波模块连接。 The stage 2 of the adjustable light dimming system of LED lamp, wherein the controlled regulator comprises a controllable voltage regulator is connected to a first and a controlled potentiometers, controlled stability claims pressure provided in the DC power supply output terminal, the output terminal of the first potentiometer and anti controlled oscillation power filter module connector.
  4. 4.根据权利要求3所述舞台可调光LED灯的调光系统,其特征在于,所述可控稳压器和第一受控电位器之间的连接线路上还设有相连接的肖特基二极管和储能电感,第一受控电位器的输出端设有滤波电容器。 4. A stage according to claim 3 adjustable light dimming system of LED lamp, wherein the connection line between the regulator and the controllability is further provided with a first controlled potentiometer connected Shaw Schottky diodes and inductor, the controlled potentiometer output of the first filter capacitor is provided.
  5. 5.根据权利要求4所述舞台可调光LED灯的调光系统,其特征在于,所述防振荡功率滤波模块包括相串联的功率电阻和功率电容器,防振荡功率滤波模块与滤波电容器相连接;防振荡功率滤波模块和受控稳压器构成可控谐振阻尼LC输出滤波器。 4 according to the stage tunable light dimming system of LED lamp, wherein the anti-oscillation power module includes a filter coupled in series power resistor and a power capacitor, the oscillation preventing power filtering module is connected to the filter capacitor as claimed in claim ; anti-filtering module and the controlled oscillation power regulator configured damping controllable resonant LC output filter.
  6. 6.根据权利要求2所述舞台可调光LED灯的调光系统,其特征在于,所述PWM控制信号受控电位器包括相连接的电阻器和第二受控电位器,第二受控电位器两端分别设置电阻器。 The stage 2 of the adjustable light dimming system of LED lamp, wherein said PWM control signal is controlled by a potentiometer including a resistor and a second controlled potentiometer connected to the second controlled claims are provided at both ends of the resistor potentiometer.
  7. 7.根据权利要求2所述舞台可调光LED灯的调光系统,其特征在于,所述电压跟随器、大功率管、电流检测模块和电流负反馈模块依次连接组成电流负反馈环节;电流负反馈环节的电路中设有两个高速运算放大器和一个功率场效应管,两个高速运算放大器和一个功率场效应管循环连接。 The stage 2 of the adjustable light dimming system of LED lamp, wherein the voltage follower, power management, the current detection module and a current negative feedback modules are sequentially connected to form a negative feedback loop as claimed in claim current; current part of the negative feedback circuit is provided with two high-speed operational amplifiers and a power FET, and two high-speed operational amplifiers connected to a power FET cycle.
  8. 8.根据权利要求I〜7任一项所述调光系统实现一种舞台可调光LED灯的调光方法,其特征在于,包括以下步骤: (1)信号输入及处理单元中,微控制器分别接收来自DMX信号模块的各输出通道控制信号、来自基板温度信号模块的温度信号和来自各个输出通道中电流负反馈模块的电流信号,然后对各输出通道控制信号、温度信号和电流信号进行处理,对各输出通道输出相应的控制信号; (2)来自微控制器的控制信号经过PWM控制信号受控电位器进行分压后,送入电压跟随器,电压跟随器同时接受电流负反馈模块的电流信号;电压跟随器根据电流信号对分压后的控制信号进行进一步处理后,最终的控制信号通过大功率管以负载电流的形式输送至LED灯处;电流检测模块实时检测大功率管输出端的电流,电流负反馈模块将得到的电流信号分别反馈至微控制器和电压跟 8. I~7 according to any one of the dimming system required to achieve dimming a lamp light LED adjustable stage, characterized by comprising the steps of: (1) the input signal and a processing unit, a micro control respectively receiving each output channel from the DMX signal module control signal, the temperature signal from the temperature of the substrate of the signal module, and from the respective output channel in the current negative feedback module current signal and the control signal, the temperature signal and the current signal for each output channel processing, output a corresponding control signal for each output channel; (2) a control signal from the microcontroller via a PWM control signal controlled potentiometer for dividing, into a voltage follower, the voltage follower while receiving negative feedback current module current signal; a voltage follower current signal according to the partial pressure of the control signal for further processing, the final control signal to the LED lights in the form of a load current through the power tube; real current detection module detects the output power tube current terminal of the current signal, the current negative feedback module obtained and fed back to the microcontroller voltages with 器; (3)受控稳压器接收来自微控制器的控制信号后,对来自直流电源模块的电压进行稳压处理,经过防振荡功率滤波模块后以负载电压的形式输送至LED灯处。 ; A (3) controlled regulator receives control signals from the microcontroller, the voltage from the DC power supply is regulated process, after filtering module oscillation preventing power delivered to the LED lights in the form of load voltage.
CN 201210274096 2012-08-02 2012-08-02 Dimming system and method of dimmable LED lamp for stage CN102762016A (en)

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