CN107613603A - LED slowly-brightened control system - Google Patents

LED slowly-brightened control system Download PDF

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Publication number
CN107613603A
CN107613603A CN201710743024.XA CN201710743024A CN107613603A CN 107613603 A CN107613603 A CN 107613603A CN 201710743024 A CN201710743024 A CN 201710743024A CN 107613603 A CN107613603 A CN 107613603A
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control
current
unit
configured
system
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CN201710743024.XA
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Chinese (zh)
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朱力强
周俊
李萌
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昂宝电子(上海)有限公司
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Priority to CN201710743024.XA priority Critical patent/CN107613603A/en
Publication of CN107613603A publication Critical patent/CN107613603A/en

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Abstract

The invention provides an LED slowly-brightened control system. The LED slowly-brightened control system comprises an input unit, a constant-current control unit and a timing unit, wherein the input unit is configured to rectify an input voltage of the system, the constant-current control unit is configured to receive the rectified current and output a control current to control a load current passing through a load unit, and the timing unit is coupled to the constant-current control unit and is configured in a way that the load current is changed with time in a powered-on stage of the system.

Description

LED缓亮控制系统 Slow LED light control system

技术领域 FIELD

[0001]本发明的某些实施例涉及集成电路。 [0001] Certain embodiments of the present invention relates to an integrated circuit. 更具体地,本发明的一些实施例提供了用于LED开关控制的系统。 More particularly, some embodiments of the present invention provides a system for controlling the LED switch.

背景技术 Background technique

[0002] led作为一种节能环保的新型光源,由于具有高亮度、低功耗而且寿命长的优点而被广泛用于各个领域。 [0002] led energy saving as a new light source, since a high luminance, low power consumption and long life advantages are widely used in various fields. 由于在接近额定电流的范围内,LED的发光亮度与流过的电流成正比而与其两端的电压无关,因此LED在工作时希望恒流源来供电。 Since close to the rated current in the range, emission luminance of the LED voltage proportional to the current flowing through its ends and is independent of the constant current source to the LED power desired at work.

[0003]图1是示出了传统LED照明恒流控制原理图的图示。 [0003] FIG. 1 is a diagram illustrating a conventional LED lighting constant current control principle of FIG. 如图1所示,LED照明的系统1〇〇包括输入单元100 (包括例如,保险丝F1和整流桥U1)、恒流控制单元120、以及负载单元130 (包括例如,LED灯珠V3、输出电容C1)。 Shown, LED lighting system 1 comprises 1〇〇 100 (including, for example, a fuse F1 and a rectifying bridge Ul), the constant current control unit 120, and a load unit 130 (including e.g., LED lamp beads V3, the output capacitor input unit C1). 不同的系统控制架构主要体现在恒流控制单元的差异,如开关电源恒流控制架构和线性恒流控制架构,其中开关电源控制中又包括boost, buck,flyback,buck-boost等恒流控制架构。 Different system control architecture is mainly reflected in the differences in the constant current control unit, switching power supply and a constant current control architecture linear constant current control architecture, which also includes a switching power supply control boost, buck, flyback, buck-boost and other current control architecture . 这类恒流控制单元主要的工作目标是系统正常工作时维持输出LED负载的电流恒定。 The main objectives of such constant current control unit is to maintain a constant output current of the LED load when the system is working properly.

[0004]如图1所示,系统上电以后,AC输入电压(例如,VAC)被接收,并进行全波整流处理以生成经整流的电压。 [0004] After, the power system shown in FIG. 1, the AC input voltage (e.g., VAC) is received, and full-wave rectification to generate a rectified voltage. 例如,经整流的电压不下降至0伏特以下。 For example, less than the rectified voltage to 0 volts. 例如,恒流控制单元120内部的放大器在上电后控制GATE端电压使功率调整管(未示出)处于导通或关断状态,从而控制负载单元中LH)灯珠的电流保持恒定。 For example, the constant current amplifier 120 inside the control unit after power-on of the power control GATE voltage regulator (not shown) is turned on or turned off, thereby controlling the load unit LH) beads lamp current is kept constant.

[0005] 由于LED灯珠的亮度由流过LED的工作电流Ile5d确定,所以大多数LED照明系统均采取恒定电流控制LED工作电流的控制方式来达到恒定LED灯珠亮度的目的。 [0005] Since the luminance of the LED lamp operating current flowing through the LED is determined Ile5d, most LED lighting control system to adopt a LED operating current of the constant current control to achieve a constant brightness of the LED lamp.

[0006] 一般的LED照明产品,由于恒流控制的系统建立很快,用户使用时明显感觉到亮度的突然变化,特别是功率较大的LED照明设备,在环境光线较暗条件下更容易在开机瞬间对人眼产生光亮刺激。 [0006] LED lighting products generally, since the constant current control system to establish very quickly, clearly feel a sudden change in brightness when the user, particularly large power LED lighting apparatus, easier in dark ambient light conditions boot bright moment for the human eye irritation.

[0007] 因此,需要改进的LED缓亮控制系统。 [0007] Accordingly, improved ease of LED light control system.

发明内容 SUMMARY

[0008] 本发明的某些实施例涉及集成电路。 [0008] Certain embodiments of the present invention relates to an integrated circuit. 更具体地,本发明的一些实施例提供了LED缓亮控制系统。 More particularly, some embodiments of the present invention provides an LED light control system buffer. 仅作为示例,本发明的一些实施例被应用到LED照明。 For example only, some embodiments of the present invention is applied to the LED lighting. 但是,将认识到,本发明有更广泛的适用范围。 However, it will be appreciated that there is a wider scope of the present invention.

[0009] 本发明提出了本专利发明了一种缓亮控制的LED照明系统和方法,可以精确控制LED系统在开机后输出电流随时间的缓慢变化,从而达到优化的人眼视觉舒适观感。 [0009] The present invention proposes the present invention patent LED lighting system and method for controlling the slow light, LED system can be precisely controlled output current changes slowly with time in the boot, so as to optimize comfort of human visual perception. 进一步的,本发明的控制方法可以适用于住宅、建筑物、商业及工业专用LED照明等多个领域。 Further, the control method of the present invention may be applied to various fields of residential buildings, commercial and industrial lighting specific LED.

[0010] 根据一个实施例,提供了一种LED照明缓亮控制系统,包括:输入单元,被配置为对系统的输入电压进行整流;恒流控制单元,被配置为接收经整流的电压,并且输出控制电流以控制流过负载单元的负载电流;以及计时单元,计时单元耦接到恒流控制单元,并且被配置为在系统的上电阶段使得负载电流随时间而改变。 [0010] According to one embodiment, there is provided an LED lighting slow light control system, comprising: an input unit configured to input voltage rectifying system; constant current control unit is configured to receive the rectified voltage, and a control current to control the output load current flowing through the load unit; and a timing unit, the timing unit coupled to the constant current control unit, and is configured so that the load on the electric current phase of the system changes over time.

[0011]根据另一实施例,提供了一种包括如本公开的实施例所述的用于LED开关控制的系统的LED灯具。 [0011] According to another embodiment, there is provided an embodiment comprising a LED lamp system for switching control of the LED as the embodiment of the present disclosure.

[0012]根据实施例,可以获得一项或多项益处。 [0012] According to an embodiment, one or more of benefits may be obtained. 参考随后的详细的说明和附图,这些好处和本发明的各种附加的目的、特征和优势可得以透彻地理解。 With reference to the following detailed description and drawings, and various additional benefits of the present invention, these objects, features, and advantages can be thoroughly understood.

附图说明 BRIEF DESCRIPTION

[0013]图1是示出了传统Lm)照明恒流控制原理图的图示。 [0013] FIG. 1 is a diagram illustrating a conventional Lm) lighting constant current control schematics.

[0014]图2是根据本公开的实施例的led照明缓亮控制原理图。 [0014] FIG. 2 is a view of the slow light led lighting control principle embodiment of the present disclosure.

[0015]图3是根据图2所述实施例的LED照明缓亮曲线图示。 [0015] FIG. 3 is a graph illustrating the slow light to illuminate the LED 2 according to the embodiment of FIG.

[0016]图4a是根据本公开的实施例的、实现缓亮和恒流控制的原理图。 [0016] FIG 4a is a embodiment of the present disclosure, light and ease of realization was in accordance with constant-current control.

[0017]图4b是根据图4a的实施例的、控制恒流单元的参考电压实现缓亮的图示。 [0017] FIG. 4b is, the control unit of the reference voltage to achieve constant light slow illustrating the embodiment according to Figure 4a.

[0018]图5a是根据本公开的实施例的、实现缓亮和恒流控制的另一原理图。 [0018] Figure 5a is a embodiment of the present disclosure, other schematics achieve slow and constant current control according to the light.

[0019] 图5b是根据图5a的实施例的、控制死区时间实现缓亮的图示。 [0019] FIG 5b is a control dead-time to achieve slow light illustrating the embodiment according to Figure 5a.

[0020]图6是根据本公开的实施例的、控制恒流控制器的参考电压和死区时间T〇ff实现缓壳的原理图。 [0020] FIG. 6 is a schematic diagram T〇ff achieve slow housing in accordance with an embodiment of the present disclosure, the reference voltage control and the constant current controller dead time.

[0021]图7a是实现根据本公开的实施例的缓亮计时控制的一种架构的图示。 [0021] Figure 7a illustrates an architecture for achieving slow timing bright embodiment of the present disclosure controlled.

[0022]图7b是实现根据本公开的实施例的缓亮计时控制的另一架构的图示。 [0022] Figure 7b is a diagram illustrating another implemented architecture of the slow timing bright embodiments of the present disclosure controlled.

[0023]图7c是实现根据本公开的实施例的缓亮计时控制的又一架构的图示。 [0023] Figure 7c is implemented according to a further illustrating the timing architecture slow light of the present disclosure an embodiment of the control.

具体实施方式 Detailed ways

[0024]下面将详细描述本发明的各个方面的特征和示例性实施例。 [0024] The features of the various aspects of the present invention and exemplary embodiments will be described in detail below. 在下面的详细描述中提出了许多具体细节,以便提供对本发明的全面理解。 In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. 但是,对于本领域技术人员来说很明显的是,本发明可以在不需要这些具体细节中的一些细节的情况下实施。 However, the skilled person it is evident that the present invention may be practiced without these specific details in some detail. 下面对实施例的描述仅仅是为了通过示出本发明的示例来提供对本发明的更好的理解。 The following description of the embodiments by merely for illustrating an example of the present invention to provide a better understanding of the present invention. 本发明决不限于下面所提出的任何具体配置和算法,而是在不脱离本发明的精神的前提下覆盖了元素、部件和算法的任何修改、替换和改进。 The present invention is not limited to any specific configuration and algorithm set forth below, but without departing from the spirit of the cover the present invention any modification of elements, components and algorithms, substitutions and improvements. 在附图和下面的描述中,没有示出公知的结构和技术,以便避免对本发明造成不必要的模糊。 In the drawings and the following description is not shown well-known structures and techniques, in order to avoid unnecessarily obscuring the present invention.

[0025]图2是根据本公开的实施例的LED照明缓亮控制原理图。 [0025] FIG. 2 is a schematic diagram of the slow light LED lighting control embodiment of the present disclosure. 图2仅是示例,其不应不适当地限制权利要求的范围。 FIG 2 is merely an example, which should not unduly limit the scope of the claims. 本领域普通技术人员将认识到许多变化、替换和修改。 Those skilled in the art will recognize many variations, alternatives, and modifications. 图2所示的LED照明恒流控制系统200包括输入单元210、恒流控制单元220、负载单元230以及计时单元240。 FIG constant current LED lighting control system 200 shown includes an input unit 210, the constant current control unit 220, load unit 230 and timing unit 240.

[0026]如图2所示,系统上电以后,AC输入电压(例如,VAC)被接收,并进行全波整流处理以生成经整流的电压。 [0026] After, the power system shown in Figure 2, the AC input voltage (e.g., VAC) is received, and full-wave rectification to generate a rectified voltage. 例如,经整流的电压不下降至0伏特以下。 For example, less than the rectified voltage to 0 volts. 例如,恒流控制单元220内部的放大器在上电后控制GATE端电压使功率调整管(未示出)处于导通或关断状态,从而控制负载单元中LED灯珠的电流保持恒定。 For example, the constant current control unit 220 inside the power amplifier control voltage GATE terminal of the power regulator (not shown) is turned on or turned off, to thereby control the current in the LED lamp load unit is kept constant.

[0027]控制单元的误差放大器在上电后,控制栅极端电压使功率调整管处于导通或关断状态。 [0027] The error amplifier control unit after power, the control gate terminal of the power voltage regulator is turned on or turned off state. 当Vout电压高于LED的最小击穿电压时,电流通过LED,输出恒定的LED电流lied,以控制LED灯珠。 When the minimum breakdown voltage Vout is higher than the LED voltage, current through the LED, an LED output constant current Lied, to control the LED lights.

[0028] 其中计时单元240与恒流控制单元220相耦接,用于控制恒流控制单元220之间,从而使系统200的输出LED电流在系统开机上电阶段随时间而改变。 [0028] wherein the timing unit 240 and the constant current control unit 220, is coupled between a constant current control unit 220 controls such that the output of the LED 200 current system boot stage in the power system changes over time.

[0029] 图3是根据图2所述实施例的LED照明缓亮曲线图示。 [0029] FIG. 3 is a graph illustrating the slow light to illuminate the LED 2 according to the embodiment of FIG. 如图3所示,示出了一类人眼观感较为舒适的缓亮曲线。 As shown in FIG. 3, there is shown a more comfortable class of human eye perception of bright slow curve. 当系统开机后时间t从〇开始增加,对应的系统输出LED电流也从〇开始变化,当时间到达系统设置时间tf时,LED电流达到系统设计的最大值,即100 %输出电流大小并以后不再随时间变化,此时系统开机缓亮结束。 When the system boot time t increases from the square, the corresponding system output of the LED current also begins to change from the square, when the time reaches the set time TF system, the LED current maximum system design, i.e., 100% of the output current and not later then change over time, then the system slow boot bright end. 这其中缓亮时间tf由图2中计时单元240实现,而0到tf期间输出LED电流ILH)随时间的变化关系则通过240的输出信号time 进入恒流控制单元220进行控制。 This time tf 240 wherein the slow light is implemented by the timer unit in FIG. 2, the output of the LED current during ILH 0 to tf) change with time of the relationship between time 240 is the output signal of the control unit 220 enters the constant current control.

[0030] 图4a是根据本公开的实施例的、实现缓亮和恒流控制的原理图。 [0030] FIG 4a is a embodiment of the present disclosure, light and ease of realization was in accordance with constant-current control. 图4a仅是示例,其不应不适当地限制权利要求的范围。 FIG 4a is merely an example, which should not unduly limit the scope of the claims. 本领域普通技术人员将认识到许多变化、替换和修改。 Those skilled in the art will recognize many variations, alternatives, and modifications. 当前主要的LED照明系统中恒流控制单元无论采取开关电源恒流控制架构还是线性恒流控制架构,其基本控制原理是从系统中侦测能够表征输出电流的反馈信号与控制器产生恒定的参考电压进行比较或误差放大,并控制系统功率级实现恒流。 The main current in constant current LED lighting system control unit, whether to take the switching power supply constant current control architecture, or linear constant current control architecture, the basic control principle is capable of detecting the reference to characterize the output current feedback signal from the system controller to produce a constant or compares the voltage error amplifier, and a control system to achieve constant power level. 图4a给出了一种基于本发明的缓亮控制原理的一个示例,主要的缓亮和恒流控制单元包括计时器U401、参考电压产生单元U402和恒流控制单元U403,恒流控制中的功率级单元是U2。 Figure 4a shows an example of the present invention is based on the slow light control principle, light slow main control unit includes a timer and a constant current U401, U402 cell and the reference voltage generating unit U403 constant current control, the constant current control a power stage unit U2. 图4a系统基本缓亮和恒流控制方法就是通过计数器U401产生控制信号(例如,时间信号time)来控制CC (恒流) 单元U403的输入参考电压Vref,该控制是在参考电压单元U402中完成。 FIG. 4a basic system slow light and the constant current control is to generate a control signal (e.g., a time signal time) is controlled by a counter U401 CC (constant current) input unit U403 reference voltage Vref, the reference voltage control unit is created in U402 .

[0031]图4b是根据图4a的实施例的、控制恒流单元的参考电压实现缓亮的图示。 [0031] FIG. 4b is, the control unit of the reference voltage to achieve constant light slow illustrating the embodiment according to Figure 4a. 当系统开机后时间t从0开始增加,对应的CC恒流控制单元的输入参考电压Vref也从0开始增加,当时间到达系统设置时间tf时,Vref变化到设计的最大值并以后不再随时间变化,此时系统开机缓亮结束。 When the time t is increased from zero, the input reference voltage Vref corresponding to the CC of the constant current control unit is also increased from zero after the system is turned on, the system when the time reaches the set time tf, to a maximum value Vref and the design will no longer change with time change, then the system slow boot bright end. 这其中缓亮时间tf由图4a中计时单元U401实现,而0到tf期间Vref随时间的变化关系则通过U401的输出信号time进入参考电压产生单元U402进行控制。 This time tf U401 wherein the slow light is implemented by a timing unit in Figure 4a, and 0 during the change with relation to time tf Vref is the output signal generating unit time U401 U402 controls into the reference voltage.

[0032]图5a是根据本公开的实施例的、实现缓亮和恒流控制的另一原理图。 [0032] Figure 5a is a embodiment of the present disclosure, other schematics achieve slow and constant current control according to the light. 图5a仅是示例,其不应不适当地限制权利要求的范围。 Figure 5a is merely an example, which should not unduly limit the scope of the claims. 本领域普通技术人员将认识到许多变化、替换和修改。 Those skilled in the art will recognize many variations, alternatives, and modifications. 对于开关电源恒流控制架构,其基本控制原理是从系统中侦测能够表征输出LED电流的反馈信号与控制器产生恒定的参考电压进行比较或误差放大,产生PWM或PFM信号控制系统功率级的功率开关通断实现恒流。 Constant current control architecture for switching power supply, the basic principle is the detection of the feedback control signal and the controller is capable of characterizing the output current from the LED system generates a constant reference voltage, or error amplifier, to generate a PWM or PFM signal power level control system switch off the power to achieve constant current.

[0033]图5a给出了一种基于本发明的缓亮控制原理的另一个示例,主要的缓亮和恒流控制单元包括恒流控制单元U501,PWM (脉冲宽度调制)/PFM (脉冲频率调制)控制单元U502、计时器U503、死区控制单元U504,驱动单元U505,恒流控制中的功率级单元是U2。 [0033] Figure 5a gives a further example of the present invention is based on the slow light control principle, the main relief highlight and constant current control unit comprises a constant current control unit U501, PWM (Pulse Width Modulation) / PFM (Pulse Frequency modulation) control unit U502, a timer U503, dead time control unit U504, a drive unit U505, the constant current control unit is a power stage U2. 其基本控制方法是CC (恒流)单元U501输出经PWM/PFM控制单元产生逻辑控制信号pwm_pfm输入到死区时间控制单元U504,计数器U503产生时间计时信号time输入到死区时间控制单元U504,而死区时间控制单元U504的功能是在正常pwm_pfm信号的关断信号结束点后加入与计时信号time相关的死区关断时间产生输出信号sw,sw经驱动单元U505放大后控制功率级U2实现恒流控制。 The basic control method is CC (constant current) output unit U501 generate PWM / PFM control unit is input to the logic control signal pwm_pfm dead time control unit U504, U503 generation time counter timing signal is input to the dead-time time control unit U504, and dead-time control function unit U504 is added to the dead zone related to the timing signal time after turn-off signal ending point of a normal pwm_pfm signal off-time to produce an output signal sw, sw after driving unit U505 amplification control power stage U2 achieve constant flow control. 这种控制pwm_pfm信号死区时间的方法可以使系统功率开关开启时间延长,控制开关周期增加,控制系统输出LED电流实现缓亮和恒流。 This method of control pwm_pfm dead time signal allows the system to the power switch on-time extension, increase of the switching control cycle, the output of the LED current control system to achieve slow and constant light.

[0034]图5b是根据图5a的实施例的、控制死区时间实现缓亮的图示。 [0034] FIG 5b is a control dead-time to achieve slow light illustrating the embodiment according to Figure 5a. 当系统开机后时间t 从〇开始增加,对应的死区时间Tdead也从TO (T0>0)开始减少,当时间到达系统设置时间tf 时,死区时间Tdead减少到0并以后不再随时间变化,此时系统开机缓亮结束。 When the system boot time t starts increasing from the square, corresponding to the dead time also Tdead (T0> 0) begins to decrease from the TO, the system when the time reaches the set time tf, Tdead dead time and will no longer be reduced to zero over time change, then the system slow boot bright end. 这其中缓亮时间tf由图5a中计时单元U503实现,而0到tf期间死区时间Tdead随时间的变化关系则通过U503的输出信号time进入死区时间控制单元U504进行控制。 Wherein the light delay time tf which is implemented by FIG. 5a timing unit U503, and to 0 during a dead time tf Tdead change with time of the relationship between the output signal into the time U503 dead time control unit U504 control.

[0035]图6是根据本公开的实施例的、控制恒流控制器的参考电压和死区时间T〇ff实现缓亮的原理图。 [0035] FIG. 6 is slow to realize a bright T〇ff schematic diagram according to an embodiment of the present disclosure, the reference voltage control and the constant current controller dead time. 主要的缓亮和恒流控制单元包括参考电压产生单元ueoi、恒流控制单元U602, PWM/PFM控制单元U603、计时器U604、死区控制单元单元U605,驱动单元U606,恒流控制中的功率级单元是U2。 Slow and bright primary constant current control unit includes a reference voltage generating unit ueoi, constant current control unit U602, PWM / PFM control unit U603, a timer U604, the dead zone control means unit U605, a drive unit U606, the constant current control of the power a stage unit U2. 其基本控制方法是计数器U503产生时间计时信号time分别输入到参考电压产生单元U6〇l和死区时间控制单元U6〇5,并在参考电压产生单元U6〇l中控制输入到恒流控制单元中的参考电压Vref,在死区控制单元单元U605中控制死区时间Tdead,最后产生逻辑信号sw经驱动单元U606放大后控制功率级U2实现缓亮和恒流控制。 The basic method of control is to generate a time counter U503 time timing signal are input to the reference voltage generating unit and a dead-time control U6〇l U6〇5 unit, and generates the control unit U6〇l input to the reference voltage in the constant current control unit the reference voltage Vref, the dead zone in the control unit in the control unit U605 dead time Tdead, and finally generates a logic signal sw after driving unit U606 control the power amplification stage U2 achieve slow light and the constant current control. 计时信号time控制基准单元和死区时间的原理与上文所述的图4b和图5b类似,在此不再复述。 The principles described above with reference timing signal time control unit and the dead time is similar to Figures 4b and 5b, not repeat it here.

[0036]图7a是实现根据本公开的实施例的缓亮计时控制的一种架构的图示。 [0036] Figure 7a illustrates an architecture for achieving slow timing bright embodiment of the present disclosure controlled. 图7a通过电容设置缓亮计时时间,电路包括恒定电流Ic,开关Swl和开关控制信号K1,电容C1和计时单元U7,其基本工作原理是,当系统开机以后控制器产生恒定电流Ic,并打开控制开关SW1,使Ic对电容C1进行充电,电容C1上的电压Vramp大小随充电时间t线性变化,Vramp输入到计时单兀U7中,根据Vramp电压大小可以产生对应的时间信号time。 FIG. 7a is provided by the capacitive delay timer bright time, the constant current circuit comprising Ic, switches Swl and a switching control signal K1, the capacitance C1 and the timer unit U7, which is a basic principle, the system boot When the controller generates a constant current Ic, and open the control switch SW1, so that Ic of the capacitor C1 is charged, the voltage Vramp size of the capacitor C1 varies linearly with the charging time t, to time Vramp input single Wu U7, the timing signal may be generated corresponding to time according to the size of the Vramp voltage.

[0037]图7b是实现根据本公开的实施例的缓亮计时控制的另一架构的图示。 [0037] Figure 7b is a diagram illustrating another implemented architecture of the slow timing bright embodiments of the present disclosure controlled. 图7b通过电阻设置缓亮计时时间,电路包括放大器单元U6和M0,电流镜像单元Ml和M2,电阻R1和计时单元U7,其基本工作原理是,当系统开机以后放大器单元、电流镜像单元和电阻以共同产生恒定电流Ic并输入到计时单元U7中: FIG. 7b disposed slow light measured time through the resistor, the circuit comprising an amplifier unit U6 and M0, the current mirroring unit Ml and M2, the resistor R1 and the timer unit U7, which is a basic principle, When the system power amplifier unit, the current mirror means and a resistor to collectively generate a constant current Ic is input to the timing unit and U7:

[0038] Ic=K*Vref/Ri (等式3) [0038] Ic = K * Vref / Ri (Equation 3)

[0039]其中,K代表电流镜系数,心代表感测电阻器R1的阻值,并且Vref代表放大器输入参考电压。 [0039] where, K representative current mirror coefficients, representative of a sensed cardiac resistance of the resistor R1 and the reference voltage Vref representative of the amplifier input. 计时单元U7根据产生随电流Ic大小变化的时间信号time。 The timing generating unit U7 size variation with time of the signal current Ic time.

[0040]图7c是实现根据本公开的实施例的缓亮计时控制的又一架构的图示。 [0040] Figure 7c is implemented according to a further illustrating the timing architecture slow light of the present disclosure an embodiment of the control. 图7c通过数字时钟信号elk设置缓亮计时时间,电路即为传统数字计数单元,在已设置输入时钟信号elk频率或周期条件下,计数单元U7根据计数数目产生对应时间信号time。 FIG 7c light timer set time delay, that is a conventional digital counting circuit unit via a digital clock signal elk, set at the input frequency or period of the clock signal elk conditions, the time counting unit U7 generates a signal corresponding to time according to the number of counts.

[0041]在示例1中,提供了一种LED照明缓亮控制系统,包括:输入单元,被配置为对系统的输入电压进行整流;恒流控制单元,被配置为接收经整流的电压,并且输出控制电流以控制流过负载单元的负载电流;以及计时单元,计时单元耦接到恒流控制单元,并且被配置为在系统的上电阶段使得负载电流随时间而改变。 [0041] In Example 1, a slow light LED lighting control system comprising: an input unit configured to input voltage rectifying system; constant current control unit is configured to receive the rectified voltage, and a control current to control the output load current flowing through the load unit; and a timing unit, the timing unit coupled to the constant current control unit, and is configured so that the load on the electric current phase of the system changes over time.

[0042]在示例2中,示例1中的计时单元还被配置为当达到预设的最大值时,不再改变负载电流。 When [0042] In Example 2, Example 1 is further configured to, when timing unit reaches a preset maximum, the load current does not change.

[0043]在示例3中,示例2中的计时单元包括:计时器,被配置为生成时间信号;以及参考电压生成器,参考电压生成器被配置为基于时间信号生成参考电压,并且将参考电压输出到恒流控制单元用作恒流控制单元的参考电压。 [0043] In Example 3, Example 2 timing unit comprises: a timer, configured to generate a time signal; and a reference voltage generator, a reference voltage generator is configured to generate a voltage based on the reference time signal and the reference voltage the reference voltage output to the constant current control unit as a constant current control unit.

[0044]在示例4中,示例1中的系统恒流控制单元被配置为基于参考电压和反馈信号来生成控制电流,其中所述反馈信号表征负载电流。 [0044] In Example 4, the example constant current control unit 1, the system is configured to a reference voltage and generating a feedback signal based on the control current, wherein the feedback signal indicative of the load current.

[0(M5]在示例5中,示例1中的系统还包括PWM(脉冲宽度调制)/PFM(脉冲频率调制)控制单元,PWM/PFM控制单=被配置为接收控制电流,并且基于控制电流生成逻辑信号。 [0 (M5] In Example 5, an example of the system 1 further includes a PWM (Pulse Width Modulation) / PFM (pulse frequency modulation) control unit, PWM / PFM control unit = configured to receive a control current based on the control current generating a logic signal.

[0046]在示例6中,示例5中的计时单元包括:计时器,被配置为生成时间信号;死区控制单元,被配置为接收时间信号和逻辑信号,并且基于收时间信号和逻辑信号生成触发信号; 以及驱动单元,被配置为基于触发信号控制负载电流。 [0046] In Example 6, the example of the timing unit 5 comprises: a timer, configured to generate a time signal; dead time control unit is configured to receive the time signal and a logic signal, and based on the reception time and logic signals generated a trigger signal; and a driving unit configured to control the load current based on a trigger signal.

[0047]在示例7中,示例6还包括参考电压生成器,参考电压生成器被配置为基于时间信号生成参考电压,并且将参考电压输出到恒流控制单元用作恒流控制单元的参考电压。 [0047] In Example 7, Example 6 further comprising a reference voltage generator, a reference voltage generator is configured to generate a time signal based on a reference voltage, and outputs the reference voltage to the reference voltage and constant current control unit is used as the constant current control unit . [0048]根据一个示例,计时器包括控制开关,被配置为响应于系统上电后产生的恒定电流而打开从而使得恒定电流对电容器充电;其中时间信号基于电容器上的电压而生成,并且其中电容器上的电压是随时间线性变化的。 [0048] According to one example, a control switch comprising a timer, configured to be responsive to the constant current power generation after the system is opened so that the constant current charging a capacitor; wherein the time signal based on a voltage generated across the capacitor, wherein the capacitor and the voltage changes linearly with time.

[0049]根据一个示例,计时器包括放大器、电流镜以及电阻器;其中当系统上电时,计时器产生根据下式的控制电流: [0049] According to one example, the timer includes an amplifier, a current mirror and a resistor; wherein when the system is powered on, the timer generates a control current according to the following formula:

[0050] I c=K*Vref /R1 [0050] I c = K * Vref / R1

[0051]其中,K代表电流镜电流镜系数,R1代表感测电阻器的阻值,并且Vref代表放大器输入参考电压;其中时间信号是基于控制电流的大小生成的。 [0051] where, K representative current mirror current mirror coefficients, representative of the resistance Rl sense resistor, and a reference voltage Vref representative of the amplifier input; wherein the time signal is generated based on the magnitude of the control current.

[0052]根据一个示例,计时单元被配置为基于数字时钟信号来生成时间信号。 [0052] According to one example, the timer unit is configured to generate a digital clock signal based on the timing signal.

[0053] 本发明的某些实施例涉及集成电路。 [0053] Certain embodiments of the present invention relates to an integrated circuit. 更具体地,本发明的一些实施例提供了LED缓亮控制系统。 More particularly, some embodiments of the present invention provides an LED light control system buffer. 仅作为示例,本发明的一些实施例被应用到LED照明。 For example only, some embodiments of the present invention is applied to the LED lighting. 但是,将认识到,本发明有更广泛的适用范围。 However, it will be appreciated that there is a wider scope of the present invention.

[0054] 例如,使用一个或多个软件组件、一个或多个硬件组件、和/或软件和硬件组件的一个或多个组合,本发明的各种实施例的一些或全部组件各自单独地和/或以与至少另一组件结合的方式被实施。 [0054] For example, using one or more software components, or a combination of one or more of the plurality of hardware components, and / or software and hardware components, various embodiments of the invention, some or all components of one embodiment and each individually / or be implemented in combination with at least another embodiment assembly. 在另一示例中,本发明的各种实施例的一些或全部组件各自单独地和/或以与至少另一组件结合的方式被实施在诸如一个或多个模拟电路和/或一个或多个数字电路之类的一个或多个电路中。 In another example, some or all of the components of the various embodiments of the present invention are each individually and / or in combination with at least another embodiment of the assembly is such as one or more analog circuits and / or one or more one or more circuits in a digital circuit or the like. 在另一示例中,本发明的各种实施例和/或示例可以被结合。 In another example, the embodiments and / or examples of various embodiments of the present invention may be incorporated.

[0055]虽然已经描述了本发明的特定实施例,但本领域的技术人员应该理解,存在等同于所描述的实施例的其它实施例。 [0055] While there have been described particular embodiments of the present invention, those skilled in the art will appreciate that there are equivalents to the described embodiments of the other embodiments. 因此,应该理解,本发明并不限于所示出的具体实施例, 而仅由所附权利要求的范围所限定。 Accordingly, it should be understood that the invention is not limited to the specific embodiments shown, but is limited only by the scope of the appended claims.

Claims (11)

1. 一种aD照明缓亮控制系统,包括: 输入单元,被配置为对所述系统的输入电压进行整流; 恒流控制单元,被配置为接收经整流的电压,并且输出控制电流以控制流过负载单元的负载电流;以及计时单元,所述计时单元耦接到所述恒流控制单元,并且被配置为在所述系统的上电阶段使得所述负载电流随时间而改变。 A slow aD bright lighting control system comprising: an input unit configured to input voltage to said rectifying system; constant current control unit is configured to receive the rectified voltage, and outputs a control current to control flow a load current through the load unit; and a timing means, the timing unit coupled to the constant current control unit, and is configured such that the load current at power-up phase of the system changes over time.
2. 如权利要求1所述的系统,其中所述计时单元还被配置为当达到预设的最大值时,不再改变所述负载电流。 2. The system according to claim 1, wherein the timing unit is further configured to, when a preset maximum, the load current does not change.
3. 如权利要求1所述的系统,其中所述计时单元包括: 计时器,被配置为生成时间信号;以及参考电压生成器,所述参考电压生成器被配置为基于所述时间信号生成参考电压,并且将所述参考电压输出到所述恒流控制单元用作所述恒流控制单元的参考电压。 3. The system according to claim 1, wherein said timing unit comprises: a timer, configured to generate a time signal; and a reference voltage generator, the reference voltage generator is configured to generate a reference signal based on the time voltage and the reference voltage to the reference voltage output of the constant current control unit is used as the constant current control unit.
4. 如权利要求1所述的系统,其中所述恒流控制单元被配置为基于所述参考电压和所述反馈信号来生成所述控制电流。 4. The system according to claim 1, wherein said constant current control unit is configured based on the reference voltage and the feedback signal to generate the control current.
5. 如权利要求1所述的系统,还包括PWM (脉冲宽度调制)/PFM (脉冲频率调制)控制单元,所述PWM/PFM控制单元被配置为接收所述控制电流,并且基于所述控制电流生成逻辑信号。 5. The system according to claim 1, further comprising a PWM (Pulse Width Modulation) / PFM (pulse frequency modulation) control unit, the PWM / PFM control unit is configured to receive the control current, and based on the control current generation logic signal.
6. 如权利要求5所述的系统,其中所述计时单元包括: 计时器,被配置为生成时间信号死区控制单元,被配置为接收所述时间信号和所述逻辑信号,并且基于收所述时间信号和所述逻辑信号生成触发信号;以及驱动单元,被配置为基于所述触发信号控制所述负载电流。 6. The system of claim 5, wherein said timing unit comprises: a timer, configured to generate a dead-time signal control unit is configured to receive the time signal and the logic signal, and based on the received said time signal and generating a trigger signal of the logic signal; and a driving unit configured to, based on the trigger signal to control the load current.
7. 如权利要求6所述的系统,还包括参考电压生成器,所述参考电压生成器被配置为基于所述时间信号生成参考电压,并且将所述参考电压输出到所述恒流控制单元用作所述恒流控制单元的参考电压。 7. The system according to claim 6, further comprising a reference voltage generator, the reference voltage generator is configured to generate a reference voltage based on said time signal and said constant current control means outputs to the reference voltage used as the reference voltage of the constant current control unit.
8. 如权利要求3或6所述的系统,其中所述计时器包括控制开关,被配置为响应于所述系统上电后产生的恒定电流而打开从而使得所述恒定电流对电容器充电; 其中所述时间信号基于所述电容器上的电压而生成,并且其中所述电容器上的电压是随时间线性变化的。 8. The system of claim 3 or claim 6, wherein said control switch comprises a timer, configured to be responsive to the constant current generated by the system after the opening such that the constant current to charge a capacitor; wherein the time signal based on a voltage generated on the capacitor, and wherein the voltage on the capacitor changes linearly with time.
9. 如权利要求3或6所述的系统,其中所述计时器包括放大器、电流镜以及电阻器; 其中当所述系统上电时,所述计时器产生根据下式所述的控制电流: Ic = K*Vref/Rl 其中,K代表所述电流镜电流镜系数,&代表感测电阻器的阻值,并且Vref代表放大器输入参考电压; 其中所述时间信号是基于控制电流的大小生成的。 9. The system of claim 3 or claim 6, wherein said timer includes an amplifier, a current mirror and a resistor; wherein when the system is powered on, the timer generates a control current according to the formula: Ic = K * Vref / Rl wherein K represents the coefficient of said current mirror current mirror, & amp; Representative sense resistor resistance, representative of an amplifier input and a reference voltage Vref; wherein said timing signal is generated to control the current magnitude based on of.
10. 如权利要求1所述的系统,其中所述计时单元被配置为基于数字时钟信号来生成所迷时间信号。 10. The system according to claim 1, wherein the timing unit is configured to generate a clock signal based on the digital signal is lost time.
11. 一种包括如权利要求1-10中的任何一项所述的用于LED开关控制的系统的LED灯具。 11. An LED lamp comprising any switching control system for an LED according to claim 1-10.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008089539A1 (en) * 2007-01-22 2008-07-31 Power Integrations, Inc. Control arrangement for a pfc-pwm power converter
CN102098829A (en) * 2009-12-11 2011-06-15 富准精密工业(深圳)有限公司 Lamp and control system thereof
CN102548084A (en) * 2010-12-07 2012-07-04 泰州乐金电子冷机有限公司 Device and method for controlling light source in gradual brightness change manner
CN105048811A (en) * 2015-08-17 2015-11-11 西安交通大学 Conduction time correction fixed-frequency cycle-skip controller and method of DC-DC converter
CN106793250A (en) * 2016-11-21 2017-05-31 深圳市必易微电子有限公司 Constant current circuit and the constant current controller

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM420146U (en) * 2010-07-19 2012-01-01 Yocom Corp Ltd Adjustable Light-emitting diode direct AC driving device with timer design for steady illumination
CN103379711B (en) * 2012-04-23 2015-06-03 Ad技术有限公司 LED lighting device
CN102740564B (en) * 2012-06-28 2015-04-22 上海新进半导体制造有限公司 Light emitting diode (LED) driving circuit and control method of LED
CN104640300A (en) * 2013-11-15 2015-05-20 凹凸电子(武汉)有限公司 Light source drive circuit, color temperature controller and method for controlling light source color temperature
TWM477115U (en) * 2013-12-17 2014-04-21 Unity Opto Technology Co Ltd LED driver circuit providing TRIAC holding current using controlled current source

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008089539A1 (en) * 2007-01-22 2008-07-31 Power Integrations, Inc. Control arrangement for a pfc-pwm power converter
CN102098829A (en) * 2009-12-11 2011-06-15 富准精密工业(深圳)有限公司 Lamp and control system thereof
CN102548084A (en) * 2010-12-07 2012-07-04 泰州乐金电子冷机有限公司 Device and method for controlling light source in gradual brightness change manner
CN105048811A (en) * 2015-08-17 2015-11-11 西安交通大学 Conduction time correction fixed-frequency cycle-skip controller and method of DC-DC converter
CN106793250A (en) * 2016-11-21 2017-05-31 深圳市必易微电子有限公司 Constant current circuit and the constant current controller

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