Source: https://patents.google.com/patent/CN102246597B/en
Timestamp: 2019-06-18 21:35:38
Document Index: 316946846

Matched Legal Cases: ['§ 119', '§ 119', 'Application No. 61', 'Application No. 61', 'application No. 11', 'Application No. 11', 'application No. 12']

CN102246597B - LED-based lighting system having a feedback response time division ambient light - Google Patents
LED-based lighting system having a feedback response time division ambient light Download PDF
CN102246597B
CN102246597B CN200980149987.0A CN200980149987A CN102246597B CN 102246597 B CN102246597 B CN 102246597B CN 200980149987 A CN200980149987 A CN 200980149987A CN 102246597 B CN102246597 B CN 102246597B
CN200980149987.0A
CN102246597A (en
威廉·A·德雷珀
2008-12-12 Priority to US61/122,198 priority
2009-06-30 Priority to US12/495,206 priority
2009-12-02 Application filed by 皇家飞利浦有限公司 filed Critical 皇家飞利浦有限公司
2009-12-02 Priority to PCT/US2009/066373 priority patent/WO2010068538A1/en
2011-11-16 Publication of CN102246597A publication Critical patent/CN102246597A/en
2016-05-11 Publication of CN102246597B publication Critical patent/CN102246597B/en
一种照明系统包括针对环境光的时分光输出感测和调节。 A lighting system comprising a time division sensing the light output and adjust for ambient light. 在至少一个实施例中，时发光输出感测涉及调节送到发光二极管(LED)组的功率，且LED组包括一个或多个LED。 In at least one embodiment, when the output of the sensing light emission adjustment relates to a light emitting diode (LED) power group, and the LED group comprises one or more LED. 在至少一个实施例中，LED组中的每个LED包含在单个灯内，且在至少一个实施例中，LED的组包含在多个灯中。 In at least one embodiment, each LED in the LED group contained within a single lamp, and in at least one embodiment, a plurality of LED groups included in the lamp. 在至少一个实施例中，对于每个灯，控制器通过使用时分算法选择性地降低送到LED组的功率来调制送到LED组的功率，从而允许光传感器在LED组的影响降低情况下感测环境光的亮度。 In at least one embodiment, for each lamp, a time-division controller by using selective algorithm to reduce the power LED groups to be modulated power LED set, thereby allowing the influence of light sensor LED group decreased in the case of sense measuring brightness of ambient light. 在至少一个实施例中，照明系统还包括对于不同光谱的LED的时分光输出感测和调节。 In at least one embodiment, the illumination system further comprises a time division sensing and adjusting the light output of the LED of different spectra.
具有时分环境光反馈响应的基于发光二极管的照明系统 LED-based lighting system having a feedback response time division ambient light
[0002] 根据35U.SC§ 119(e)，本申请要求2008年12月12日提交的、名称为“inglePhoto-Detector for Color Balance of Multiple LED Sources” 的美国临时申请61/122，198的权益。 [0002] According to 35U.SC§ 119 (e), this application claims filed December 12, entitled "inglePhoto-Detector for Color Balance of Multiple LED Sources" of US Provisional Application No. 61 / 122,198 of . 美国临时申请61/122，198包括示例性的系统和方法，通过引用其全文合并于此。 U.S. Provisional Application No. 61 / 122,198 of exemplary systems and methods include, incorporated herein by reference in its entirety.
[0003] 本发明一般涉及照明和信号处理领域，并且更具体地，涉及用于不同光谱的发光二极管的时分光输出感测和调节的系统和方法。 [0003] The present invention relates generally to the field of lighting and signal processing, and more particularly, relates to a time division sensing and regulating the light output of the light emitting diode systems and methods to different light spectrums.
[0004] 发光二极管(LED)作为主流光源正变得特别受欢迎的一部分原因是通过高效率光输出达到节能以及诸如减少汞的环境动机。 Part of the reason [0004] The light emitting diode (LED) as a light source are becoming mainstream particularly popular by high efficiency light output to save energy and reduce the environmental incentive such as mercury. LED是一种半导体器件，由直流电驱动。 LED is a semiconductor device driven by a DC motor. LED的亮度(即发光强度)大致与流过LED的电流成正比例变化。 LED brightness (i.e. light emission intensity) is substantially proportional to the current flowing through the LED changes. 因此，增大提供给LED的电流会增大LED的强度，减小提供给LED的电流会使LED变暗。 Thus, to increase the current supplied to the LED increases the intensity of the LED to reduce the current supplied to the LED LED will darken. 可以通过直接降低送到LED的直流电流水平或者通过占空比调制降低平均电流改变电流。 A direct current can be changed by reduced current level to reduce the average LED current or duty ratio modulation.
[0005] 图1描绘照明系统100，其包括灯102。 [0005] FIG 1 depicts an illumination system 100, which includes a lamp 102. 灯102包括产生人造光106的光源104。 Lamp 102 includes a light source 104 generating artificial light 106. 光106从灯102的外壳的内表面反射，通过扩散器108传播，从而产生光110。 Light reflected from the inner surface 106 of the lamp housing 102, propagates through the diffuser 108, 110 to generate light. 照明系统100还包括环境光传感器112以促进光捕获。 The illumination system 100 further comprises an ambient light sensor 112 to promote light trapping. 光捕获涉及用自然光114补充人造光110，将人造光的调节与自然光的变化相关联。 Supplementary artificial light capture relates to natural light 110 light 114, will vary with the regulation of natural light and artificial light is associated. 环境光传感器112的物理位置与设计选择有关。 Ambient light sensor 112 and the physical location of design choice. 在至少一个实施例中，环境光传感器112物理地附连于灯102的外部。 In at least one embodiment, the ambient light sensor 112 is physically attached to the outside of the lamp 102. 环境光传感器202在灯外壳208外部上的位置帮助最小化人造光204对灯传感器202接收的环境光206的影响。 Ambient light sensor 202 at a position outside of the lamp housing 208 helps to minimize the influence of the artificial light the lamp 204 pairs 202 receives ambient light sensor 206. 在至少一个实施例中，环境光传感器112被远程定位，并且使用任何可用的通信技术与控制器124通信。 In at least one embodiment, the ambient light sensor 112 is remotely located, and communicate using any communications technology available with the controller 124.
[0006] 灯102接收来自电源电压源116端子118和120的交流(AC)电压VAe—SUPPW。 [0006] The lamp 102 receives AC voltage from the power source terminal 118 and 120 of 116 (AC) voltage VAe-SUPPW. 电压源116例如是公用电、AC电源电压VAe—SUPP„例如在美国是60Hz/110V线电压，或者在欧洲是50Hz/220V 线电压。 Voltage source 116, for example, utility power, AC power voltage VAe-SUPP "is, for example, in U.S. 60Hz / 110V line voltage, or in Europe 50Hz / 220V line voltage.
[0007] 照明系统100包括功率控制系统122，其包括控制器124以控制提供给光源104的功率，因此控制由光源104产生的人造光110的亮度。 [0007] The illumination system 100 includes a power control system 122, which includes a controller 124 to control the power supplied to the light source 104, thus controlling the brightness of the light source 104 produced by the artificial light 110. 控制器124生成控制信号CS。 The controller 124 generates a control signal CS. ，并将控制信号CS。 And the control signal CS. 提供给灯驱动器126，以控制由灯驱动器126传送给光源104的功率。 Provided to the lamp driver 126 to control the power transmitted by the lamp driver 126 to the light source 104. 灯驱动器126的具体配置与设计选择有关，并且部分地取决于光源104的配置。 Lamp driver 126 specific configuration of design choice, and depends in part on the light source 104 is arranged. 光源104可以是任何类型的光源，诸如白炽的、萤光的或基于LED的光源。 The light source 104 may be any type of light source, such as incandescent, fluorescent, or LED-based light source. 灯驱动器126根据控制信号CS。 Lamp driver 126 according to the control signal CS. 给光源104提供功率。 104 provides power to the light source.
[0008] 环境光传感器112产生感测信号SENp感测信号SEN1表不环境光的亮度。 [0008] ambient light sensor 112 does not generate a luminance table SEN1 ambient light sensing signal SENp sensing signal. 如果环境光相对太低或者太高，控制器124使灯驱动器126增大或降低人造光110的亮度。 If the ambient light is relatively low or too high, the controller 124 so that the lamp driver 126 to increase or decrease the brightness of the artificial light 110.
[0009] 因为由环境光传感器112感测的环境光包括人造光110的影响，照明系统100的光捕获不能准确说明光110的亮度。 [0009] Since the ambient light sensed by the ambient light sensor 112 including the impact of artificial light 110, light trapping illumination system 100 can not accurately describe the brightness of the light 110.
[0010] 在本发明的一个实施例中，一种设备包括:控制器，其配置成耦连到传感器和灯的第一发光二极管(LED)。 [0010] In one embodiment of the present invention, an apparatus comprising: a controller configured to be coupled to the sensor and the first light emitting diode (LED). 所述控制器进一步配置成降低送到与所述控制器耦连的第一发光二极管(LED)的功率，并在送到所述第一LED的功率降低时，接收来自传感器的表示由所述传感器接收的光的亮度的信号。 When the controller is further configured to reduce power to the controller and coupled to the first light emitting diode (LED), and to the first power of the LED decreases, represented by the received from the sensor a luminance signal of the light received by the sensor. 所述控制器还配置成根据亮度相关目标值调节所述第一LED的亮度。 The controller is further configured to adjust the first LED brightness according to the brightness of the relevant target.
[0011] 在本发明的另一个实施例中，一种设备包括具有至少第一发光二极管(LED)的灯。 [0011] In another embodiment of the present invention, an apparatus comprising at least a first light emitting diode (LED) lamp. 所述设备还包括感测接收光的亮度的传感器。 The apparatus further comprises a sensor sensing the brightness of the received light measured. 所述设备进一步包括耦连到所述灯和所述传感器的控制器。 The apparatus further comprises a controller coupled to the lamp and the sensors. 所述控制器配置成降低送到所述第一LED的功率，并在送到所述第一LED的功率降低时，接收来自所述传感器的表示由所述传感器接收的光的亮度的信号。 Said controller configured to reduce the power supplied to the first LED, and to reduce the power of the first LED, the brightness of the light reception signal received by the sensor from the sensor indicates. 所述控制器进一步配置成根据亮度相关目标值，调节所述第一LED的亮度。 The controller is further configured to operate according to the brightness of the relevant target value, adjusting brightness of the first LED.
[0012] 在本发明的又一个实施例中，一种用于光捕获的方法包括降低送到第一发光二极管(LED)的功率。 Method [0012] In still another embodiment of the present invention, a method for capturing light comprises reducing power to the first light emitting diode (LED),. 所述方法进一步包括在送到所述第一LED的功率降低时，接收表示光亮度的信号，并根据亮度相关目标值调节所述第一LED的亮度。 The method further comprising when the first LED to the power reduction, receiving a luminance signal, and adjusting the luminance according to the brightness of the first LED relevant target.
[0013] 在本发明的另一个实施例中，一种用于光捕获的设备包括用于降低送到第一发光二极管(LED)的功率的装置。 [0013] In another embodiment of the present invention, an apparatus comprises means for capturing the light power to the first light emitting diode (LED) is used for reducing. 所述设备进一步包括在送到所述第一LED的功率降低时接收表示光亮度的信号的装置，以及根据亮度相关目标值调节第一LED的亮度的装置。 The apparatus further comprises a signal light intensity, and means for adjusting the first LED brightness according to the brightness related to a target value when the first LED receiving a power reduction.
[0014] 通过参照附图可以更好地理解本发明，其各种目标、特征和优点对本领域技术人员是很显然的。 [0014] By the present invention may be better understood with reference to the accompanying drawings, its various objects, features and advantages will be readily apparent to those skilled in the art. 在几幅图中使用相同的附图标记来指示相同或相似元件。 The same reference numerals throughout the several drawings to refer to the same or similar elements.
[0015]图1 (标示为现有技术)描绘用于光捕获的照明系统。 [0015] Figure 1 (labeled prior art) depicts a lighting system for light capture.
[0016] 图2描绘具有针对光捕获的时分光输出感测和调节的照明系统。 [0016] FIG 2 depicts a time division sensing and adjusting the light output of the illumination system for the captured light.
[0017] 图3描绘用于光捕获的时分算法。 [0017] FIG 3 depicts a time division algorithm for the captured light.
[0018] 图4描绘光感测/驱动电流调制时序图。 [0018] FIG 4 depicts a light-sensing / modulation timing chart of driving current.
[0019] 图5、图6和图7描绘具有多个灯及同步方案的各照明系统。 [0019] Figures 5, 6 and 7 depict each of a plurality of lamps and a lighting system with synchronization scheme.
[0020] 图8描绘具有不同光谱的发光二极管的时分光输出感测和亮度调节的照明系统。 [0020] Figure 8 depicts the light emitting diodes having different light output spectrum of a time division sensing system and the illumination brightness adjustment.
[0021] 图9描绘图8的照明系统的一个实施例。 [0021] FIG 9 depicts an illumination system according to one embodiment of FIG. 8 embodiment.
[0022] 图10描绘用于感测、调节图9照明系统中的光亮度的时分调节算法。 [0022] FIG. 10 depicts a sense to adjust the brightness of the time-division illumination system 9 in FIG adjustment algorithm.
[0023] 图11描绘LED驱动电流信号的时序图，其图解说明用于图10算法的间隔时分(interspacing time divis1n)。 [0023] FIG. 11 depicts a timing chart of the LED drive current signal, illustrating the division interval (interspacing time divis1n) 10 for the algorithm of FIG.
[0024] 图12描绘LED驱动电流信号的时序图，其图解说明用于图10算法的分散时分。 [0024] FIG. 12 depicts a timing chart of the LED drive current signal, for illustrating the dispersion time division algorithm 10 of FIG.
[0025] 图13描绘LED驱动电流信号的时序图，其图解说明用于图10算法的单一时分。 [0025] FIG. 13 depicts a timing chart of the LED drive current signal, a single division 10 for illustrating the algorithm of FIG.
[0026] 图14描绘图9的照明系统的时分调节算法的另一实施例。 Another [0026] Figure 14 depicts an illumination system of FIG. 9 is a time division control algorithm embodiment.
[0027] 图15描绘图8的照明系统的控制器的一个实施例。 An embodiment [0027] FIG. 15 depicts an illumination system controller of FIG. 8 embodiment.
[0028] 在至少一个实施例中，照明系统包括针对环境光的时分光输出感测和调节。 [0028] In at least one embodiment, the illumination system comprising an optical time division for output of the ambient light sensing and regulation. 在至少一个实施例中，时分光输出感测涉及调制送到一组LED的功率，该组LED包括一个或多个LED0在至少一个实施例中，LED组中的每个LED包括在单个灯中，在至少一个实施例中，LED组包含于多个灯中。 In at least one embodiment, the light output of the time division sensing relates to a set of modulation power of the LED, the LED group comprises one or more LED0 at least one embodiment, each LED in the LED group comprises a single lamp in at least one embodiment, LED group comprising a plurality of lamps. 在至少一个实施例中，对于每个灯，控制器通过时分算法选择性地降低送到LED组的电流调制送到LED组的功率，从而允许光传感器以来自LED组的减小的影响感测环境光的亮度。 In at least one embodiment, for each lamp, a time division algorithm by the controller to selectively reduce current modulation of power to the LED groups LED groups, so as to allow light from the LED sensor to reduce the effect of group sensing brightness of ambient light. 在至少一个实施例中，功率可以通过将电流降低到O而降低，因此，使灯中的每个LED“关断”，或者功率可以被降低到大于O的值。 In at least one embodiment, the power can be reduced by reducing the current to O, so that each lamp LED "OFF", or the power may be reduced to a value of greater than O. 在至少一个实施例中，控制器将环境光的确定亮度和亮度的目标值进行比较，调节LED组发射的光的亮度，以满足目标值。 In at least one embodiment, the controller determines the brightness of the ambient light and the brightness target values, adjust the brightness of the light emitted from LED groups to satisfy the target value.
[0029] 在至少一个实施例中，多个灯的功率调制是同步的，使得减少来自使用一个或多个LED作为光源的多个灯的光(在本文称作“LED灯”)，以允许一个或多个光传感器以减小的(包括消除的)LED灯影响感测环境光。 [0029] In at least one embodiment, a plurality of lamp power modulation is synchronized, so as to reduce light from one or more of the plurality of LED lamps as a light source (referred to herein as "LED lamp"), to allow one or more light sensors to reduce (including eliminating) LED lamp impact sensing ambient light. 人眼通常要花费1-10毫秒(ms)来感测光亮度的变化。 The human eye usually takes 1-10 milliseconds (ms) to sense a change in metering brightness. 光传感器可以在少于Ims的时间内感测光亮度变化。 The light sensor may sense light luminance variation in less than the time Ims. 因此，在至少一个实施例中，在Ims或更少时间内降低送到LED的电流，以允许光传感器在对人眼没有明显影响情况下感测环境光。 Thus, in at least one embodiment, to reduce the current in the LED Ims or less time to permit the light sensor to sense the environment of the human eye no significant effect on the light.
[0030] 在至少一个实施例中，对于具有多个LED的照明系统，除了感测环境光之外，照明系统包括针对不同光谱的发光二极管(LED)的时分光输出感测和亮度调节。 [0030] In at least one embodiment, the illumination system having a plurality of LED's, in addition to the sensed ambient light, the light output of the illumination system comprising a time division sensing and brightness for different spectrum light emitting diodes (LED), adjusted. 在至少一个实施例中，多个LED发射的光的亮度是通过在不同时间中改变送到多个LED的子组的功率、在功率降低期间检测LED的亮度来调节的。 In at least one embodiment, a plurality of luminance of light emitted by the LED at different times by changing the power of the LED to a subset of the plurality of detecting brightness of the LED is adjusted during the power reduction. 在至少一个实施例中，一旦确定LED的亮度，控制器判定该亮度是否满足目标亮度值，如果不满足，控制器以满足目标亮度值为目的调节每个LED。 In at least one embodiment, once the luminance of the LED is determined, the controller determines whether the luminance value satisfies the target luminance, and if not, the controller to meet the target value of luminance of each LED adjustment purposes. 在至少一个实施例中，随时间改变送到多个LED的子组的功率并调节LED的亮度的过程被称作“时分光输出感测和调节”。 In at least one embodiment, the change in power to a plurality of LED subset of the process over time and adjust the brightness of LED is referred to as "time division sensing and adjusting the light output." 因此，在至少一个实施例中，照明系统包括针对不同光谱的发光二极管(LED)的时分光输出感测和调节。 Thus, in at least one embodiment, the light output of the illumination system comprising a time division sensing and adjusting for the different spectral light emitting diode (LED),.
[0031] 在至少一个实施例中，LED组是一组亮度被共同调节的一个或多个LED。 [0031] In at least one embodiment, LED group is a set of one or more LED brightness are adjusted jointly. 例如，第一组LED可以包括4个红色LED，第二组LED可以包括3个蓝色LED。 For example, the LED may comprise a first set of 4 red LED, the second LED may include a set of three blue LED. 每组LED的亮度可以被共同确定、调节。 The brightness of each LED may be determined jointly adjusted. 在至少一个实施例中，时分光输出感测涉及随时间的改变调制送到LED不同子组的多个LED的功率，例如随时间的改变改变电流。 In at least one embodiment, the time division sensing the light output directed to a different subset of the plurality of LED LED changes over time of the power modulation, for example, changing the current change over time. 每个子组中LED的数目与设计选择有关，可以是单个LED。 The number and design of each subset related to the selection of LED, may be a single LED.
[0032] 在至少一个实施例中，控制器通过在有限的持续时间中选择性降低送到具有感兴趣光谱的一个或多个LED的子组的功率，调制送到LED的功率，并使时分算法为具有感兴趣光谱的每组LED重复功率降低，执行LED的时分功率调制。 [0032] In at least one embodiment, the controller for a limited duration by selectively reduced to one or more LED having spectrum subgroup of interest power, modulation to the power of the LED, and division LED algorithm having repeating each power spectrum of interest is reduced, the division performed LED power modulation. 时分功率调制允许控制器确定每组LED对由一个或多个传感器接收的光的亮度的相对影响。 Power division modulation permits each LED controller determines the relative influence of light received by one or more luminance sensors. 在至少一个实施例中，控制器根据LED的时分功率调制，将不同时刻感测的接收光的不同亮度关联，来确定各组LED的亮度。 In at least one embodiment, the controller according to the time division LED power modulation, the luminance of received light associated with different sensing different times, to determine the brightness of each LED group. 在至少一个实施例中，控制器将确定的各组LED的亮度与目标值比较，调节LED发射的光的亮度以满足目标值。 In at least one embodiment, each group of LED brightness and comparing the determined control target value, adjust the brightness of the light emitted by the LED to meet the target value.
[0033] 在至少一个实施例中，LED发射的光的光谱与设计选择有关。 [0033] In at least one embodiment, the design of the spectrum of light emitted by the LED selection. 在至少一个实施例中，LED代表至少两个不同光谱。 In at least one embodiment, LED representing at least two different spectra. 在至少一个实施例中，一个或多个传感器是光敏晶体管，其被校准以补偿由于诸如升高的工作温度的因素造成的操作特征的一个或多个变化。 In at least one embodiment, the one or more sensors is a phototransistor, which is calibrated to one or more operating characteristics of the compensation due to factors such elevated operating temperatures caused by the change.
[0034] 图2描绘照明系统200，其例如通过调节提供给LED组202的功率以补偿感测的环境光204的亮度，从而便于光捕获。 [0034] FIG 2 depicts an illumination system 200, which is provided, for example by regulating the power supplied to the LED group 202 to compensate for sensed ambient light brightness of 204, to facilitate light trapping. LED组202包括一个或多个LED。 LED group 202 comprises one or more LED. LED组202中的每个LED的具体类型和光谱与设计选择有关。 The LED group 202 for each LED and spectral particular type of design choice. LED的“光谱”指LED发射的光的一个或若干波长。 LED's "spectrum" refers to light emitted by a LED or several wavelengths. 光的波长确定光的颜色。 Determining the wavelength of the light color of the light. 因此，LED的光谱指LED发射的光的颜色。 Thus, LED refers to the color spectrum of the light emitted by the LED. 例如，在一个实施例中，蓝-绿光谱LED106发射蓝-绿光，红色光谱LED108发射红色光。 For example, in one embodiment, the blue - blue-green spectral emission LED106 - green light, red light emission LED108 red spectrum. 例如，LED组202的光谱可以是红色、绿色、蓝色、琥珀色、白色等，包括前述颜色的任何组合。 For example, the spectrum of the LED group 202 may be red, green, blue, amber, white, etc., including any combination of the foregoing color. 照明系统200的灯206包括功率控制系统208。 206 lighting system 200 includes a power control system 208. 功率控制系统208包括控制LED驱动电流ίίΕ:)—:的控制器210和LED驱动器212。 The power control system controls the LED driver 208 includes current ίίΕ:) -: The controller 210 and LED driver 212. LED组202的亮度与LED驱动电流ίίΕ:)—:成正比。 LED group 202 and the LED drive current brightness ίίΕ:) -: is proportional to. 控制器210包括时分模块214以便于时分功率调制，从而以LED组202的减小的影响感测环境光204。 The controller 210 includes a module 214 to time-division power modulation in time division so as to reduce the impact of the LED group 202 to sense the ambient light 204. 在至少一个实施例中，时分功率调制指在一段时间中改变提供给一个或多个LED的功率。 In at least one embodiment, the power division modulation refers to a change of power supplied to the one or more LED in the period of time. 灯206接收来自功率源216的功率。 Lamp 206 receives power from the power source 216. 功率源216可以是任何功率源，如AC电压源110 (图1)。 Power source 216 may be any power source, such as an AC voltage source 110 (FIG. 1).
[0035] 光传感器218感测到达光传感器218的光的亮度，生成感测信号SEN”感测信号SENAl代表由光传感器218感测的光的亮度。光传感器218将感测信号SEN Αί提供给控制器210。如下文更详细描述的，在至少一个实施例中，控制器210利用感测信号SENAl来调节LED组202的亮度。光传感器218可以是任何类型的光传感器。在至少一个实施例中，光传感器218是基于光电晶体管或光电二极管，其可以在Ims或更少时间内感测由光传感器218接收的光的亮度。灯用户接口220是照明系统200的可选组件，其向控制器210提供目标参数，以设置用于调节LED组202的亮度的目标数据的值。在至少一个实施例中，灯用户接口220是灯206的集成部件。功率控制系统208、LED组202和光源218的物理布置与设计选择有关。在至少一个实施例中，灯206封闭功率控制系统208、LED组202和光传感器218。在至少一个实施 [0035] The optical sensor 218 sensing the brightness of sensing reaches the light sensor 218 generates a sensing signal SEN "sensing signal SENAl representative of optical sensor 218 sensing signal SEN Αί supplied to the luminance of the light 218 sensed by the optical sensor controller 210. as described in more detail, in at least one embodiment, the controller 210 using the sensing signal SENAl adjust the brightness of LED group 202. light sensor 218 may be any type of light sensor. in at least one embodiment the light sensor 218 is based on a photodiode or phototransistor, which can sense light received by the light sensor 218 or less Ims brightness in time. lamp user interface 220 is an optional component of the illumination system 200, which controls the 210 provides certain parameters, to set the value of the target data for adjusting the brightness of the LED group 202. in at least one embodiment, the lamp is a lamp integrated user interface 220 of member 206. 208, LED group 202 and the light source power control system 218 physical arrangement of design choice. in at least one embodiment, the lamp 206 closed power control system 208, LED group 202 and a light sensor 218. in at least one embodiment 例中，灯206包括位于灯206的灯座处的扩散器，以混合并使LED组202提供的光变柔和。光传感器218可以是能够产生感测信号SENAl的任何类型的光传感器。在至少一个实施例中，光传感器218是基于光电二极管或光电晶体管的光传感器。 Embodiment, the lamp socket 206 includes a diffuser 206 located at the lamp, and LED group 202 to provide a mixed light soften optical sensor 218 may be any type of sensor capable of generating a light sensing signal SENAl At least in one embodiment, the optical sensor 218 is based on an optical sensor of a photodiode or phototransistor.
[0036] 图3描绘用于光捕获的时分算法300，时分算法300代表允许控制器210 (图2)执行时分功率调制以感测环境光的算法的一个实施例。 [0036] FIG 3 depicts a time division algorithm 300 captured light, 300 denotes a time division algorithm allows the controller 210 (FIG. 2) performs a division algorithm for power modulation to sense ambient light embodiment. 控制器210和时分算法300的具体实施方式与设计选择有关。 The controller 210 and the detailed description of the design division algorithm 300 selection. 控制器210可以使用数字、模拟或数模技术实现。 The controller 210 may use a digital, analog or analog technology. 在至少一个实施例中，控制器210被制造为集成电路。 In at least one embodiment, the controller 210 is fabricated as an integrated circuit. 在至少一个实施例中，控制器210包括处理器，时分算法300以代码实现，并由处理器执行。 In at least one embodiment, the controller 210 includes a processor, a time-division algorithm 300 implemented in code executed by a processor. 代码可以存储在控制器210中包括的或控制器210可访问的存储器(未显示)中。 Code may be stored in a memory included in the controller 210 or controller 210 may access (not shown).
[0037] 图4描绘光感测/驱动电流调制的时序图400，其代表由控制器210的时分模块214使用的功率调制和环境光感测时序图的一个实施例。 [0037] FIG 4 depicts a light-sensing / driving timing diagram of the modulated current 400, one embodiment of power modulation and ambient light sensing timing diagram representing time-division module 210 by the controller 214 used in Example.
[0038] 参照图2、图3和图4，在至少一个实施例中，为了获得更高级的光捕获，控制器210利用时分算法300根据光感测/驱动电流调制时序图400来调节LED组202的亮度，从而补偿环境光204。 [0038] Referring to FIGS. 2, 3 and 4, in at least one embodiment, in order to obtain higher light capture, the controller 210 using time division algorithm LED group 300 is adjusted according to the light-sensing / driving current modulation timing diagram 400 brightness 202, 204 to compensate for ambient light. 在操作301中，在时刻t。 In operation 301, at time t. ，通过从功率源216给灯206施加功率“打开”灯206。 By applying power from a power source 206 to the lamp 216 "opens" the lamp 206. 当灯最初在时刻t。 When the lamp is initially at time t. 打开时，在时刻t。 When open, t at the moment. 和13之间，控制器210将LED驱动电流1:设置成预定值。 And between 13, the LED drive current controller 210 1: Set a predetermined value. 在至少一个实施例中，如LED驱动电流时间线402所示，预定值是O。 In at least one embodiment, the LED drive current time line, the predetermined value as shown in 402 is O. LED驱动电流:的预定值可以是与LED组202的已知亮度对应的任何值。 LED drive current: the predetermined value may be any value corresponding to the known brightness LED group 202.
[0039] 在操作302中，如环境光感测时间线404中所示的，在时刻&和t2之间，光传感器218感测由光传感器218接收的环境光204，并生成感测信号SEPV。 [0039] In operation 302, e.g., between times T2 and &, the light receiving sensor 218 senses the ambient light sensing shown in timeline 404 by the ambient light photosensor 218 204, and generates a sensing signal SEPV . 光传感器218将感测信号SENAl提供给控制器206。 The optical sensor 218 sensing signal to the controller 206 SENAl. 在接收感测信号SENΑί之后，在操作304中，控制器210将由感测信号SEPV代表的环境光的值与目标数据进行比较。 After receiving the sensing signal SENΑί, in operation 304, the data value and the target controller 210 by the ambient light sensing signal representative of SEPV compared. 目标数据被设置成使目标数据与环境光的值的比较表明控制器210是否应该通过增加或减小LED驱动电流Led i来调节LED驱动电流P在至少一个实施例中，如果LED驱动电流Led i在时刻t。 Object data is set to the target data and the ambient light value comparison indicates that the controller 210 is to be increased or decreased by the LED drive current Led i P adjusts the LED drive current in at least one embodiment, if the LED drive current Led i t at a time. 和13之间是0，则目标数据代表由LED组202生成的人造光加上自然光的期望亮度。 Is between 0 and 13, the target represented by the data generated by the LED group 202 coupled with artificial light of a desired brightness of natural light. 如果LED驱动电流:在时刻t。 If the LED drive current: at time t. 和13之间不设置为0，则LED组202对由光传感器218接收的光的亮度有影响，因此，该影响表示在感测信号SEPV中。 Between 0 and 13 is not provided, the luminance of the LED group 202 of the light received by the light sensor 218 affected, therefore, represents the influence of the sensing signal SEPV. 因此，如果LED驱动电流i if设置成0，则控制器210补偿LED组202对由感测信号SEPV代表的环境光204亮度的影响，以便确定对LED驱动电流:的任何调节。 Therefore, if the LED drive current i if set to 0, the influence of light 204 of the controller 210 to compensate the brightness of LED group 202 to the environment by the sensing signal representative of SEPV in order to determine the LED drive current: any adjustment. 在至少一个实施例中，为了补偿LED组202的影响，目标数据与感测信号SEN1的比较包括LED组202的亮度的已知影响。 In at least one embodiment, in order to compensate for the effect of the LED group 202, the target data with the sensed signal includes a comparison of SEN1 known to affect the brightness of the LED group 202. 因此，将目标数据与感测信号SEN1比较消除了LED组202对由感测信号SEN:代表的环境光的影响。 Thus, the target data and comparing the sensed signal SEN1 202 pairs of LED group is eliminated from the sensing signal SEN: influence of ambient light represented.
[0040]目标数据中表示的自然光加上人造光的亮度水平可以存储在控制器210可访问的存储器(未显示)中，或者可以传送给控制器210。 [0040] coupled with natural light and artificial light luminance level represented by the target data may be stored in a memory accessible to the controller 210 (not shown), or may be transmitted to the controller 210. 在至少一个实施例中，灯用户接口220是手动输入装置，其允许用户设置代表自然光加上人造光的期望的亮度水平的目标数据。 In at least one embodiment, the lamp 220 is a user interface a manual input device which allows the user to set the brightness level representative of natural light together with a desired artificial light object data. 例如，在至少一个实施例中，灯用户接口220是数字装置，其允许用户输入与期望的亮度水平对应的设置。 For example, in at least one embodiment, user interface 220 is a digital lamp device which allows a user to input luminance level corresponding to the desired setting. 在至少一个实施例中，灯用户接口220是指示期望的亮度水平的具有电阻的电位计。 In at least one embodiment, user interface 220 is a lamp indicating a desired brightness level of a potentiometer having a resistance. 在至少一个实施例中，亮度水平是经由单独的有线或无线连接从远程输入装置(未显示)，诸如，调光器或远程位置的灯用户接口220接收的。 In at least one embodiment, the luminance level is connected via a separate wired or wireless from a remote input device (not shown), such as a dimmer or remote location of the user interface 220 receives the light. 在至少一个实施例中，该连接专用于与灯206的通信。 In at least one embodiment, the connector dedicated to the communication of the lamp 206. 在至少一个实施例中，经由端子222和224接收调光器信号，控制器210截获由调光器信号指示的变暗水平，作为目标数据的亮度水平。 In at least one embodiment, the terminal 222 via the receiver dimming level of the dimmer signal, the controller 210 a signal indicative intercepted by the dimmer 224, and, as the brightness level of the target data. 调光器信号可以是任何类型的调光器信号，如来自传统的基于三端双向可控硅开关元件的调光器的相位改变信号。 Dimmer signal may be any type of dimmer signal, such as from a conventional phase-change signal based on the dimmer triac switching element.
[0041] 在操作306中，控制器210调节LED电流ίίΕ:)—p以调节LED组202的亮度，从而获得人造光加上自然光的目标亮度。 [0041] In operation 306, the controller 210 adjust the LED current ίίΕ:) - p to adjust the brightness of LED group 202, thereby obtaining the target luminance plus natural light and artificial light. 在至少一个实施例中，如果感测信号SEN1表明环境光亮度增加，则控制器210减小LED电流iLED—:的值，使得LED组202的亮度降低与环境光的亮度增加的相同的量。 In at least one embodiment, if the sensing signal indicates that the ambient light brightness increases SEN1, the controller 210 decreases the LED current iLED-: value so that the brightness of the LED group 202 is reduced with the same amount of brightness of the ambient light increases. 同样，如果感测信号SEN1表明环境光亮度降低，则控制器210增大LED电流iLED—i的值，使得LED组202的亮度增加与环境光的亮度降低的相同的量。 Similarly, if the sensed ambient light level signal SEN1 showed decreases, the controller 210 increases the value of LED current iLED-i, so that the brightness of the LED group 202 is increased by the same amount to reduce the brightness of ambient light. 操作306可包括积分函数，使得对LED驱动电流^di的调节随时间积分，以降低人眼对LED组202的亮度变化的觉察。 Operation 306 may comprise an integral function, so that the adjustment of the LED drive current ^ di integration over time, to reduce the human eyes perceive the change in luminance of the LED group 202.
[0042] 操作308停止时分算法300，直到执行操作310和重复操作302-308的时间到来。 [0042] division algorithm 300 stops operation 308, operation 310 is performed and repeated until the operation time of arrival 302-308. 时分算法300的重复频率与设计选择有关。 Repetition rate and Design division algorithm 300 of selection. 在至少一个实施例中，时分算法300每秒重复一次。 In at least one embodiment, the algorithm 300 repeats once per second time division. 在至少一个实施例中，时分调节算法300通常被重复到足以感测环境光的变化和LED组202的亮度变化，使得对LED组202发射的光的亮度调节实际上对人眼是不可觉察的。 In at least one embodiment, the control algorithm 300 is typically a time division repeated enough to sense changes in ambient light and the luminance variation LED group 202, such that light emitted from the LED group 202 to adjust the brightness actually perceived by the human eye is not . 在至少一个实施例中，时分算法300以8.3ms或1ms的倍数重复，8.3ms或1ms代表整流后60Hz和50Hz公共用电电压的相应周期。 In at least one embodiment, a time division multiple algorithm 300 in 8.3ms or 1ms repetition period corresponding to 60Hz and 50Hz 8.3ms common power voltage after rectification or on behalf of 1ms.
[0043] 在操作310中，在图4的时刻t4，时分模块214引起控制器210将LED驱动电流^di降低为O (如LED驱动电流时间线402所示，或如前面所述降低到大于O的值)。 [0043] In operation 310, FIG. 4 at time T4, time-division module 214 causes the controller 210 to the LED drive current is reduced to ^ di O (The LED driving current as shown in time line 402, as previously described, or reduced to more than O value). 在时刻〖5和16，操作302重复，使得光传感器218感测由光传感器218在时刻〖5和16之间接收的光的亮度。 〖5 and 16 at the time, operation 302 is repeated, so that the light sensor 218 senses the brightness of the light sensor 218 at a time between 5 and 16 〖received. 在时刻丨6和17之间，控制器210重复操作304和306。 Shu time between 6 and 17, the controller 210 repeats operations 304 and 306. LED驱动电流直线406表明在光传感器218检测的环境光在时刻〖2和15之间降低时，LED驱动电流i #曽加。 Straight line 406 indicates that the LED drive current when the light sensor 218 detects ambient light at a time between 2 and reducing 〖15, LED drive current i # Zeng added. LED驱动电流直线408表明在光传感器218检测的环境光在时刻tjP 15之间增加时，LED驱动电流Leiu减小。 Straight line 408 indicates that the LED drive current when the light sensor 218 detects the ambient light in the time between increasing tjP 15, LED drive current Leiu reduced.
[0044] 控制器210以各种方式中的任何一种产生控制信号CS113于2007年9月28日提交的发明人为JohnL.Melanson，代理人案号为1692-CA，标题为“Time-Based Control ofa System having Integrat1n Response，” 的美国专利申请11/864，366 描述了一种产生可以用作LED的驱动电流的控制信号的示例性系统和方法。 [0044] The controller 210 generates in any of a variety of ways to the invention the control signal CS113 on September 28, 2007, filed human JohnL.Melanson, Attorney Docket No. 1692-CA, entitled "Time-Based Control ofa system having Integrat1n Response, "U.S. Patent application No. 11 / 864,366 describes an exemplary system and method for generating a control signal can be used as the driving current of the LED. 美国专利申请11/864，366在本文称作“Melansonll”，其全部内容通过引用合并于此。 U.S. Patent Application No. 11 / 864,366 referred to as "Melansonll" herein, in its entirety is incorporated herein by reference. 于2009年3月31日提交的发明人为JohnL.Melanson，代理人案号为1812-1FO，标题为“Primary-Side Based Control OfSecondary-Side Current For An Isolat1n Transformer，，，的美国专利申请12/415，830也描述了一种产生可以用作LED的驱动电流的控制信号的示例性系统和方法。美国专利申请12/415，830在本文称作“Melanson III ”，其全部内容通过引用结合于此。在至少一个实施例中，实现控制器210，并以与Melanson II或Melanson III中描述的产生控制信号的相同方式产生控制信号CS1，不同之处是时分模块214的操作，这在随后进行描述。在至少一个实施例中，控制器210使用线性电流控制来控制驱动电流^ED1。 Was invented in March 31, 2009 filed human JohnL.Melanson, Attorney Docket No. 1812-1FO, entitled "Primary-Side Based Control OfSecondary-Side Current For An Isolat1n Transformer ,,, US Patent Application 12/415 , 830 also describes an exemplary system and method for generating a control signal can be used as the driving current of the LED. U.S. Patent application No. 12 / 415,830 referred to as "Melanson III" herein, incorporated by reference in its entirety herein in at least one embodiment, the controller 210 implemented, and in the same manner to generate control signals as described with Melanson II or Melanson III generating control signals CS1, except that the time-division operation module 214, which will be described subsequently in in at least one embodiment, the controller 210 using a linear current control for controlling the drive current ^ ED1.
[0045] 图5描绘具有N+1个灯502.0-502.N的照明系统500，“N”是大于或等于I的整数。 [0045] FIG. 5 depicts a N + 1 of the lamp lighting system 502.0-502.N 500, "N" is an integer greater than or equal to I in. 在至少一个实施例中，除灯502.0之外，每个灯502.0-502.N与灯206是相同的，这将在随后进行描述。 In at least one embodiment, in addition to lights 502.0, 502.0-502.N each lamp and the lamp 206 are the same, which will be described later. 灯502.0-502.N执行时分算法300。 Light 502.0-502.N perform 300 hours of algorithm. 为了在不知道一个或多个灯502.0-502.N的影响的情况下感测环境光的亮度，灯502.0包括同步模块504，以 To know the impact without one or more lamps 502.0-502.N luminance of the sensed ambient light, the lamp comprising 502.0 synchronization module 504 to
[0046] 同步相应操作310和302中的使用时分进行LED功率调制和感测环境光。 [0046] Synchronous operation using the respective division 310 and 302 for power modulation and sensing LED ambient light. 在至少一个实施例中，灯502.0经由信号路径506向灯502.1-502.N发送同步信号，使得灯502.0-502.N以同步时序利用输出重映射delta-sigma调制器模块400。 In at least one embodiment, the lamp 502.0 506 transmits a synchronization signal via the signal path to the lamp 502.1-502.N, 502.0-502.N synchronized timing such that the light output from the remapping using a delta-sigma modulator module 400. 通过使用同步时序，灯502.0-502.N同时执行时分算法300，没有一个灯502.0-502.N会对感测的环境光产生未知的光亮度影响。 By using the synchronization timing, while performing light division algorithm 300 502.0-502.N, 502.0-502.N would not light a sensed ambient light brightness of the light is unknown.
[0047] 图6描述具有N+1个灯602.0-602.N的照明系统600，“N”是大于或等于I的整数。 [0047] Figure 6 depicts the N + 1 having a lighting system 602.0-602.N of 600, "N" is an integer greater than or equal to I in. 在至少一个实施例中，除灯602.0之外，每个灯602.0-602.N与灯206是相同的，这将在随后进行描述。 In at least one embodiment, in addition to lights 602.0, 602.0-602.N each lamp and the lamp 206 are the same, which will be described later. 灯602.0-602.N执行时分算法300。 Light 602.0-602.N perform 300 hours of algorithm. 为了在不知道一个或多个灯602.0-602.N的影响的情况下感测环境光的亮度，灯602.0包括同步模块604，以使用时分并在各个操作310和302中感测环境光，使LED功率的调制同步。 To know the impact without one or more lamps 602.0-602.N luminance of the sensed ambient light, the lamp comprising 602.0 synchronization module 604, and time division to respective operations 310 and 302 in sensing the ambient light, so that LED power modulation synchronized. 在至少一个实施例中，灯602.0经由无线信号向灯602.1-602.N发送同步信号，使得灯602.0-602.N以同步时序利用输出重映射delta-sigma调制器模块400。 In at least one embodiment, the wireless signal lamp 602.0 transmits the synchronization signal to the lamp via 602.1-602.N, 602.0-602.N synchronized timing such that the light output from the remapping using a delta-sigma modulator module 400. 在至少一个实施例中，灯602.0通过调制灯602.0发射的光的亮度来发送同步信号，灯602.1-602.N被配置成感测亮度调制，并利用亮度调制作为同步信号，使得灯602.0-602.N以同步时序利用输出重映射delta-sigma调制器模块400。 In at least one embodiment, the synchronization signal transmitted light 602.0 luminance of the light emitted by the lamp modulation 602.0, 602.1-602.N lamp is configured to sense a brightness modulation and intensity modulation by using as a synchronization signal, such that the lamp 602.0-602 in timing synchronization using the output .N remap delta-sigma modulator module 400. 通过使用同步时序，灯602.0-602.N同时执行时分算法300，没有一个灯602.0-602.N向感测的环境光影响未知的光亮度。 By using the synchronization timing, while performing light division algorithm 300 602.0-602.N, 602.0-602.N not a lamp light to the brightness of the unknown impact sensed environment.
[0048] 图7描述具有N+1个灯702.0-702.N的照明系统700，“N”是大于或等于I的整数。 [0048] FIG. 7 is described having the N + 1 of the lighting system 702.0-702.N 700, "N" is an integer greater than or equal to I in. 在至少一个实施例中，每个灯702.0-702.N与灯206是相同的。 In at least one embodiment, each lamp 206 and the lamp 702.0-702.N same. 灯702.0-702.N执行时分算法300。 Light 702.0-702.N perform 300 hours of algorithm. 为了在不知道一个或多个灯702.0-702.N的影响的情况下感测环境光的亮度，控制器704经由信号路径706向灯702.0-702.N发送同步信号，以同步相应操作310和302中的使用时分进行LED功率调制和感测环境光。 To know the impact without one or more lamps 702.0-702.N luminance of the sensed ambient light, the controller 704 via signal path 706 transmits a synchronization signal to the lamp 702.0-702.N, and 310 to synchronize the respective operations 302 for time division modulating power LED and ambient light sensing. 在至少一个实施例中，灯702.0-702.N以同步时序利用输出重映射delta-sigma调制器模块400。 In at least one embodiment, the lamp 702.0-702.N synchronous timing output from the remapping using the delta-sigma modulator module 400. 通过 by
[0049] 使用同步时序，灯702.0-702.N同时执行时分算法300，没有一个灯702.0-702.N会对感测的环境光产生未知的光亮度影响。 [0049] The synchronous timing, while performing light division algorithm 300 702.0-702.N, 702.0-702.N would not light a sensed ambient light brightness of the light is unknown. 在至少一个实施例中，信号路径706是电源信号路径，控制器704使用协议，如XlO协议来向灯702.0-702.N发送同步信号。 In at least one embodiment, the signal path 706 is a signal supply path, the controller 704 using a protocol, such as the XlO protocol to send a synchronization signal to the lamp 702.0-702.N. 在至少一个实施例中，控制器704还可以经由无线信号发送同步信号。 In at least one embodiment, the controller 704 may also transmit a synchronization signal via a wireless signal. 也可以用其它许多方式来实现多个灯诸如灯206的多个拷贝的同步。 It may be implemented in many other ways, such as synchronizing multiple copies of a plurality of lamps of the lamps 206. 具体的同步过程与设计选择有关。 Specific synchronization process of design choice.
[0050] 图8描绘包括灯802的照明系统800。 [0050] FIG 8 depicts an illumination system 802 includes a lamp 800. 灯802包括由单独的各个LED驱动器810.0-810.N驱动的N+1个LED808.0-808.N。 Lamp 802 includes LED808.0-808.N of N + 1 is driven by a separate driver for each LED 810.0-810.N. “N”是大于或等于I的整数。 "N" is an integer greater than or equal to I in. 灯802包括具有时分模块812的控制器806以产生控制信号CSw-CSin来控制各个LED驱动器810.0-810.N，因此控制各个LED驱动电流。 Lamp 802 includes a controller 806 having a time-division module 812 to generate control signals to control various CSw-CSin LED driver 810.0-810.N, thus controlling the respective LED drive current. _1_—N。 _1_-N. 在至少一个实施例中，功率控制系统804的控制器806和时分模块812与相应控制器210和时分模块214相同，不同之处是控制器806为每个驱动器810.0-810.N产生单独的控制信号。 In at least one embodiment, the same power control system 806 and controller 804 time-division module 812 with the respective time-division controller 210 and module 214, except that the controller 806 generates each drive a separate control 810.0-810.N signal. 每个LED驱动器810.0-810.N将相应LED驱动电流Led q-Led n提供给相应LED组808.0-808.N。 Each LED driver 810.0-810.N respective LED drive current Led q-Led n is supplied to the respective LED groups 808.0-808.N. LED组808.0-808.N可以是LED颜色的任意组合，以便产生几乎无限种光谱。 808.0-808.N LED groups may be any combination of LED colors, so as to produce virtually limitless spectrum. LED组808.0-808.N中每一个都包括一个或多个LED0在至少一个实施例中，控制器806利用时分算法和输出重映射delta-sigma调制器模块400以进彳丁光捕获。 808.0-808.N each LED group includes one or more of at least one embodiment LED0 embodiment, using time division controller 806 and output from the remapping algorithm delta-sigma modulator module 400 to capture light stimulation was butoxy.
[0051] 除了光捕获之外，在至少一个实施例中，照明系统800包括针对不同光谱的发光二极管的时分光输出感测和调节。 [0051] In addition to the light capture at least one embodiment, the illumination system 800 comprises a time division sensing and adjusting the light output of the light emitting diode for a different spectrum. 照明系统800包括功率控制系统802，其在至少一个实施例中接收来自功率源216的功率。 The illumination system 800 includes a power control system 802, which in at least one embodiment, the received power from the power source 216 of FIG.
[0052] 在至少一个实施例中，LED组808中的每个LED具有近似相同的光谱。 [0052] In at least one embodiment, LED group 808 each have approximately the same LED spectrum. 具体光谱与设计选择有关，包括红色、蓝色、琥Ϊ自色、绿色、蓝-绿色和白色。 Specific spectrum of design choice, including red, blue, amber Ϊ self-colored, green, blue - green and white.
[0053] 照明系统800包括光传感器814，以感测光传感器814接收的光的亮度。 [0053] The illumination system 800 includes a light sensor 814, a photometry sensor 814 to sense the brightness of the received light. 在至少一个实施例中，光传感器814是单个的广谱光传感器，其感测由LED组808.0-808.N发射的光的所有光谱。 In at least one embodiment, the optical sensor 814 is a single broad spectrum light sensor, all of which senses the light spectrum emitted by the LED group 808.0-808.N. 光传感器814的物理位置与设计选择有关。 Photosensor 814 physical location of design choice.
[0054] 控制器806包括时分模块812，以便例如选择性地调制送到LED组808.0-808.N的功率，以允许控制器806确定LED组808.0-808.N中的至少两组的亮度。 [0054] The controller 806 includes a time-division module 812, for example, to selectively modulate the set of power to the LED 808.0-808.N to allow the controller 806 determines 808.0-808.N LED group at least two groups of luminance. 在至少一个实施例中，控制器806根据时分算法降低送到LED组808.0-808.N的功率，这允许控制器806确定LED组808.0-808.N中的至少两组发射的光816的亮度。 In at least one embodiment, the controller 806 according to the division algorithm reduces power LED group 808.0-808.N, which allows the controller 806 determines the brightness of LED group 808.0-808.N at least two emitted light 816 . 控制器806降低送到LED组的不同子组的功率，以允许控制器确定各组LED的亮度。 Controller 806 to reduce power to different sub-sets of LED groups, each group to allow the controller to determine the brightness of the LED. 时分算法的实施例在下文更详细讨论。 Division algorithm discussed in more detail below in embodiments.
[0055] 控制器806的具体实现方式与设计选择有关。 [0055] The controller 806 of the particular implementation of design choice. 控制器806可以使用数字、模拟或数模技术实现。 Controller 806 may use a digital, analog or analog technology. 在至少一个实施例中，控制器806被制造为集成电路。 In at least one embodiment, controller 806 is fabricated as an integrated circuit. 在至少一个实施例中，控制器806包括处理器，由控制器806执行的算法被以代码实现，并由处理器执行。 In at least one embodiment, the controller 806 includes a processor implemented in code executed by the algorithm of the controller 806, and executed by processors. 代码可以存储在控制器806中包括的或控制器806可访问的存储器(未显示)中。 Code may be stored or accessible to the memory controller 806 included in the controller 806 (not shown).
[0056] 图9描绘照明系统900，照明系统900代表照明系统300的一个实施例。 [0056] FIG 9 depicts an illumination system 900, illumination system 900 representative of the lighting system 300 embodiment. 灯902经由端子901和903接收来自功率源304的功率。 Lamp 902 receive power from a power source 304 via the terminal 901 and 903. 灯902包括LED 904、LED 906和LED 908，它们分别具有不同的相应光谱。 Lamp 902 includes LED 904, LED 906 and LED 908, respectively, having different respective spectra. 出于描述目的，LED 904、LED 906和LED 908将分别作为红色、绿色和蓝色LED来进行讨论，S卩，LED 904发射红色光谱的光，LED 906发射绿色光谱的光，LED 908发射蓝色光谱的光。 For descriptive purposes, LED 904, LED 906 and LED 908 respectively as the red, green and blue LED for discussion, S Jie, LED 904 emits light in the red spectrum, LED 906 emits light in the green spectrum, the blue LED emission 908 color light spectrum. 灯902还包括功率控制系统910，其代表功率控制系统302的一个实施例。 Lamp 902 further includes a power control system 910, which represents a power control system 302 of the embodiment. 功率控制系统910包括控制器912，以控制LED驱动器914、916和918，因此控制各个LED驱动电流R、iLED_GiP i LED BO在至少一个实施例中，控制器912以与控制器306产生控制信号CS1(]-CS1N，N = 2，相同的方式，产生控制信号CSr、CSjP CSB。控制器912代表控制器306的一个实施例。 The power control system 910 includes a controller 912 to control the LED drivers 914, 916 and 918, thus controlling the driving current of each LED R, iLED_GiP i LED BO In at least one embodiment, the controller 912 with the controller 306 generates a control signal CS1 (] -CS1N, N = 2, in the same manner, generates a control signal CSr, CSjP CSB. a controller 912 on behalf of the controller 306 of the embodiment.
[0057] 照明系统900还包括光传感器920，以感测来自LED 904、906和908的进入光922和环境光923，并产生感测信号SENp环境光923代表光传感器920接收的不由LED 904、906和908产生的光。 [0057] The illumination system 900 further includes a light sensor 920, to sense from the LED 904,906 and 908 of light entering the ambient light 923 and 922, and generates a sensing signal SENp ambient light LED 904 920 923 help representative of the received light sensor, 906 and 908 generated light. 在至少一个实施例中，环境光923代表来自其它人造光源的光或诸如太阳光的自然光。 In at least one embodiment, the representative of the ambient light or natural light 923, such as sunlight, artificial light sources from the other. 在至少一个实施例中，光传感器314是广谱传感器，其感测来自LED 904、906和908的光922，并感测环境光923。 In at least one embodiment, the optical sensor 314 is a broad-spectrum sensor that senses from the LED 904,906 and 908 of light 922, and 923 senses the ambient light.
[0058] 人眼通常不能觉察持续时间为I毫秒(ms)或更少时间的光源亮度降低。 [0058] The human eye typically can not perceive duration is I millisecond (ms) time or less of the light source luminance decrease. 因此，在至少一个实施例中，根据时分功率调制算法，在Ims或更少时间内降低送到LED 904,906和908的功率，并因此降低亮度，光传感器920感测在Ims或更少时间内亮度降低的光，并产生感测信号SEN1,以表示光传感器920接收的光922的亮度。 Thus, in at least one embodiment, the power modulation algorithm in accordance with a time division, reduction in time to the Ims or less power LED 904,906 and 908, and therefore reduce the brightness, the light sensor 920 senses the brightness in less time or Ims reduced light, and generates a sensing signal SEN1, 922 to represent the brightness of the light received by the light sensor 920. 在至少一个实施例中，光传感器920是任何可购买的能检测光的亮度并产生感测信号SEN1的光敏晶体管型或二极管型光传感器。 In at least one embodiment, the light sensor 920 is capable of detecting light of any luminance can be purchased, and generates a sensing signal SEN1 photo transistor or diode type optical sensor. 具体的光传感器920与设计选择有关。 Specific optical sensor 920 design choice. 控制器912包括时分模块924。 The controller 912 includes a time-division module 924. 下文将更详细解释，时分模块924与LED驱动器914、916和918结合，根据时分算法选择性地调制驱动电流iLED—R、iLED—e和i B，这允许控制器912确定LED 904,906和908的各自亮度。 Will be explained in detail below, time-division module 924 and the LED driver 914, 916 and 918 in conjunction with the division algorithm to selectively modulate the driving current iLED-R, iLED-e and i B, which allows the controller 912 determines the LED 904, 906 and 908 their brightness. 通过确定LED904、906和908的各自亮度，在至少一个实施例中，控制器912分别调节驱动电流km—R、iLED—e和i B以获得各LED 904,906和908发射的光的目标亮度。 By determining each luminance LED904,906 and 908, in at least one embodiment, the controller 912 regulates the drive current respectively km-R, iLED-e and i B to obtain a target luminance of light emission of each LED 904,906, and 908 of.
[0059] 图10描绘用来感测、调节照明系统900的LED 904,906和908发射的光的亮度的示例时分感测及LED调节算法1000 (本文称作“时分调节算法1000” )。 [0059] FIG. 10 depicts a sense to adjust the division sensing example 904, 906 and 900 the brightness of the LED lighting system 908 and the LED light emission adjustment algorithm 1000 (herein referred to as "time division adjustment algorithm 1000"). 通常，时分调节算法1000获得环境光的亮度值，并随时间改变降低LED 904、906和908的子组的亮度，确定LED 904、906和908中的每一个的亮度。 Typically, time division adjustment algorithm ambient light luminance value is obtained 1000, and change over time and reduce the brightness of LED 904,906 subgroup 908, determines the brightness of each LED 904,906 and 908.
[0060] 图11描绘用于LED 904、906和908的功率调制的间隔时分1100(图9)。 [0060] Figure 11 depicts an LED 904,906 and 1,100,908 interval division of power modulation (FIG. 9). 通常，在间隔时分1100中，环境光的亮度是通过降低送到所有LED904、906和908的功率来确定的，然后每次降低送到LED 904,906和908中的两个的电流并因此降低亮度，直到来自LED904,906和908中的每一个的光加上环境光的亮度被感测到。 Typically, 1100 hours of interval, the brightness of the ambient light is determined by reducing all LED904,906 and 908 to power, and then each time reduced to two LED 904,906 and 908 current and thus reduce the brightness, until LED904,906 light from each of the plus 908 and the ambient light luminance is sensed.
[0061] 由于环境光的亮度已知，控制器912可以确定来自LED904、906和908中每一个的光的个别亮度，将每个亮度与目标数据比较，并根据比较结果调节来自LED 904、906和908中每一个的光的亮度。 [0061] Since the luminance of ambient light is known, the controller 912 may determine from LED904,906 908 and a brightness of each individual light, the brightness of each target data comparison, and adjusting the result of the comparison from the LED 904,906 908 and a brightness of each light. 在至少一个实施例中，来自LED 904、906和908中每一个的光的亮度是通过增加或降低送到LED 904、906和908的电流来调节的。 In at least one embodiment, the luminance from the LED 904,906 and 908 of each of the light is adjusted by increasing or decreasing the current to the LED 904,906 and 908. 增大电流，亮度增加，减小电流，亮度降低。 Increasing the current, the brightness increases, the current decreases, brightness is reduced. 在间隔时分1100中，送到LED 904,906和908的功率被降低到O。 Division interval 1100, 904, 906 and 908 to the power of the LED is reduced to O. 不过，降低的具体量与设计选择有关。 However, the specific amount of reduction of design choice.
[0062] 参照图9、图10和图11，照明系统900的示例性操作涉及时分调节算法1000和间隔时分1100。 [0062] Referring to FIG 9, FIG 10 and FIG 11, an exemplary operation of an illumination system 900 is directed to a time division time division spacing adjustment algorithm 1000 and 1100. 在至少一个实施例中，为了感测LED 904、906和908中的每一个发射的光的亮度，在操作1002中，照明系统900感测环境光923。 In at least one embodiment, to sense the brightness of LED 904,906 and the light emitted from each of the 908, in operation 1002, the illumination system 900 senses the ambient light 923. 在至少一个实施例中，环境光是光传感器920接收的不是由LED 904、906或908发射的光。 In at least one embodiment, the ambient light sensor 920 receives light not emitted by a light or LED 904,906 908. 为了仅感测环境光，在时刻丨。 For only sensing ambient light, at a time Shu. 和ti之间，LED驱动电流iLED—R、iLED—e和i 4皮减小到0，从而“关断” LED 904,906或908。 And ti between, LED drive current iLED-R, iLED-e i 4 and the skin is reduced to 0, so that the "off" LED 904,906 or 908. 光传感器920在时刻t。 The optical sensor 920 at time t. 和t:之间感测环境光，产生信号SEN 该信号代表光传感器920感测的环境光923的量。 And t: between the sensing ambient light generated signal SEN signal representative of ambient light sensor 920 senses the amount of light 923. 在操作1004中，控制器912存储由信号SEN1表示的感测环境光的值。 Sensing ambient light value in operation 1004, the controller 912 stores a signal represented by SEN1. 在操作1006中，时分模块924通过在时刻丨2和13之间使LED驱动器914和916将驱动电流iLED—#卩ie减小到0，来调制送到LED 904和906的功率。 In operation 1006, the time-division module 924 by Shu time between 2 and 13 and the LED drive 914 will drive current iLED- # 916 Jie ie reduced to zero, modulated power to LED's 904 and 906. 光传感器920感测环境光923和LED 908发射的光，在操作1008中，生成表示感测光的亮度值的感测信号SEN113 Light sensor 920 senses ambient light 923 emitted by LED 908 and, in operation 1008, a luminance value of the sensing signal is generated indicates sense light SEN113
[0063] 如前面讨论的，人眼通常不能觉察持续时间为I毫秒(ms)或更少时间的光源亮度降低。 [0063] As discussed previously, the human eye typically can not perceive duration is I millisecond (ms) time or less of the light source luminance decrease. 因此，在至少一个实施例中，被以时分调节算法1000中的LED驱动电流减小时间t0-t^ t2-t3，1:4-1:5和16_t7指示的送到LED 904、906和908的功率的每个时分具有Ims或更少的持续时间，使得人们在时分调节算法1000中觉察不到“关断”和“接通”LED 904,906和908。 Thus, in at least one embodiment, the LED drive current in a time-division algorithm 1000 to reduce the time t0-t ^ t2-t3,1 adjustment: 5 and 16_t7 to the LED 904, 906 and 908 indicate: 4-1 each having a power division Ims duration or less, so that people in a time division adjustment algorithm 1000 imperceptible "oFF" and "oN" LED 904,906 and 908.
[0064] 在操作1010中，控制器912将感测信号的值与目标数据的值进行比较。 [0064] In operation 1010, the data value and the target value of the sensing signal 912 is compared controller. 目标数据包括针对感测信号SENj^目标亮度值，其中目标亮度值代表环境光和蓝色LED 908发射的光的组合的目标亮度。 Target brightness of the object data includes SENj ^ target brightness value sensed signal, wherein the target luminance value representing environmental light and the blue LED 908 of the combined light emitted. 在操作1012中，控制器912基于目标亮度值和由感测信号SEN1表示的亮度值之间的比较，来调节LED驱动电流B。 In operation 1012, the controller 912 based on a comparison between the target luminance value and the luminance value represented by the sensing signal SEN1, LED drive current is adjusted B. 如果比较表明LED 908的亮度低，则控制器912增大驱动电流B。 If the comparison shows that the low-luminance LED 908, the controller 912 increases the driving current B. 如果比较表明LED 908的亮度高，则控制器912减小驱动电流 If the comparison indicates a high brightness LED 908, the controller 912 decreases the driving current
B。 B. 确定驱动电流込:^的变化量和变化速率与设计选择有关。 Determining the drive current includes the postage: ^ change amount and the rate of change of design choice. 在至少一个实施例中，驱动电流4勺变化量是基于LED908的亮度-电流关系以及目标亮度值和由感测信号SEN ι表示的感测光的亮度值之间的差来确定的。 In at least one embodiment, the amount of change in the driving current 4 tablespoons based on the brightness LED908 - difference between the current and the relationship between the target luminance value and the luminance value represented by the sensing light sensing signal SEN ι determined. 在至少一个实施例中，驱动电流“勺变化速率足够低，例如小于1ms，以防止人们能够立即注意到的变化。 In at least one embodiment, the drive current "spoon variation rate is low enough, for example less than 1ms, in order to prevent people can immediately notice changes.
[0065] 控制器912通过调节提供给灯驱动器918的控制信号CSb，来调节驱动电流ίίΕ:)—B。 [0065] The controller 912 provides a control signal by adjusting the lamp driver 918 CSb, adjusts the driving current ίίΕ:) - B. 在至少一个实施例中，控制器912根据MelansonII或MelansonIII产生控制信号CSB，使得灯驱动器918提供期望的驱动电流B。 In at least one embodiment, the controller 912 generates a control signal CSB according MelansonII or MelansonIII, so that the driving current of the lamp driver 918 to provide the desired B.
[0066] 在操作1014中，控制器912判定对于所有LED 904、906和908，操作1006-1012是否已经完成。 [0066] In operation 1014, the controller 912 determines for all the LED 904,906 and 908, the operation has been completed 1006-1012. 如果没有完成，那么时分调节算法1000返回操作1006，为下一LED重复操作1006-1012。 If not completed, then the time division control algorithm 1000 returns to operation 1006, the operation is repeated for the next LED 1006-1012. 在当前描述的实施例中，在操作1006中，时分模块924在时刻、和15之间将驱动电流iLED—i B减小到0。 In the embodiment presently described embodiments, in operation 1006, the module 924 at time division, and 15 between the driving current iLED-i B decreases to zero. 如操作1012所示，操作1008-1012然后重复以调节驱动电流iLED—s。 As shown in operation 1012, operations 1008-1012 and then repeated to adjust the driving current iLED-s. 此外，在操作1014中，控制器912判定对于所有LED 904,906和908，操作1006-1012是否已经完成。 Further, in operation 1014, the controller 912 determines for all the LED 904,906 and 908, the operation has been completed 1006-1012. 在当前描述的实施例中，在操作1006中，时分模块924在时刻七6和17之间，将驱动电流is和i B减小到O。 In the embodiment presently described embodiments, in operation 1006, the module 924 at time seven division between 6 and 17, and the driving current i B is reduced to O. 如操作1012所示，操作1008-1012然后重复以调节驱动电流iLED—R。 As shown in operation 1012, operations 1008-1012 and then repeated to adjust the driving current iLED-R. 在对LED904、906和908执行操作1008-1012之后，时分调节算法1000从操作1014进行到操作1016。 After execution of operation 908 and LED904,906 1008-1012, 1000 from the division adjustment algorithm operation 1014 to operation 1016. 操作1016使时分调节算法1000停止，直到下一周期。 That the time division operation of control algorithm 1016 1000 stops, until the next cycle. 下一周期如之前描述地重复操作1002-1016，以重新估计来自LED 904，906和908的光的亮度。 As previously described the next cycle of operations 1002-1016 are repeated in order to re-estimate the brightness of light from the LED 904,906 and 908.
[0067] 重复时分调节算法1000的频率与设计选择有关，可以是例如大约I秒或若干秒、I分钟或若干分钟、I小时或若干小时、I天或若干天。 [0067] The frequency adjustment algorithm is repeated division and design choices about 1000, for example, it may be about I second or several seconds, several minutes or I min, I hour or several hours, several days, or I days. 在至少一个实施例中，每秒重复一次时分调节算法1000。 In at least one embodiment, control algorithm 1000 is repeated once per division. 在至少一个实施例中，时分调节算法1000通常被重复到足以感测环境光的变化和LED 904,906和908的亮度变化，使得离开扩散器928的光926的亮度是恒定的，或者至少近似是恒定值。 In at least one embodiment, the time division control algorithm 1000 is typically repeated enough to sense ambient light changes and 904, 906 and the luminance variation LED 908, so that the luminance leaving the diffuser of light 926 928 is constant, or at least approximately constant value. 另外，每个功率调制周期之间，例如，时刻tJP 12、t#P 14等等之间的定时与设计选择有关。 Further, between each power modulation period, e.g., time tJP 12, the timing design and the like between 14 t # P selection. 具体选择例如足够长，以便在为下一个LED重复操作1006-1014之前，为一个LED执行操作1006-1014。 The particular choice of example sufficiently long, prior to repeat the operation for the next LED 1006-1014, 1006-1014 perform the operations of a LED.
[0068] 在至少一个实施例中，在操作1006-1012中，只考虑LED 904、906和908的子组的亮度。 [0068] In at least one embodiment, in operation 1006-1012, and consider only luminance LED 904,906 subset 908. 例如，如果假设红色LED904随时间改变维持相对恒定的亮度，则不执行操作1006中时刻七6和17之间LED 906和908的功率调制以及操作1008-1012中LED 904的后续处理。 For example, if it is assumed red LED904 changes with time maintain a relatively constant luminance, a power LED 906 and 908 of the LED modulation, and the subsequent processing operations 1008-1012 904 between 6 and 17 seven operation time 1006 is not performed. 此外，时分调节算法1000中送到LED 904,906和908的功率降低的量与设计选择有关。 Further, time division algorithm 1000 to adjust the amount of the LED 904,906 and 908 of the power reduction of design choice. 间隔时分1100描绘驱动电流R、iLEDJ;iP i _—B在时分功率调制时间中减小到O。 1100 depicts time-division driving current interval R, iLEDJ; iP i _-B is reduced to a power modulation in a time division time O. 降低量与设计选择有关。 Reduce the amount of design choice. 在至少一个实施例中，驱动电流iu；D—C和/或i Lm—e被减小到大约10 %和90%之间的一个特定百分比。 In at least one embodiment, the drive current iu; D-C, and / or i Lm-e is reduced to a specific percentage of between about 10% and 90%. 在确定操作1012中进行的调节时，通过将驱动电流iLED—R、込D—和/或UED—B减小到低于额定值的一个值，控制器912考虑(account for)所有LED904、906和908对于由感测信号SEN1表示的亮度的亮度影响。 When adjusted, the driving current iLED-R, includes the postage D- and / or reduce the UED-B determining operation performed in 1012 to a value below the rated value, consider the controller 912 (account for) all LED904,906 908 and the brightness of the luminance represented by the sensing signal of SEN1.
[0069] 在至少一个实施例中，LED 904、906和/或908中的每一个代表单个LED。 [0069] In at least one embodiment, LED 904,906 and / or 908 each represent a single LED. 在至少一个实施例中，LED 904、906和908中的一个、两个或全部代表包括具有相同光谱的多个LED的一组LED。 In at least one embodiment, LED 904, 906 and 908 in one, two or all of the representatives, including a plurality of LED set having the same spectrum LED. 例如，在至少一个实施例中，LED 904代表多个红色LED，LED 906代表多个绿色LED，和LED 908代表多个蓝色LED。 For example, in at least one embodiment, LED 904 on behalf of a plurality of red LED, LED 906 represent a plurality of the LED of green, and LED 908 represent a plurality of blue LED. 不管LED 904、906和908中的LED的数目为多少，时分调节算法1000都适用。 Regardless of the number of LED 904,906 and 908 of the LED is how much, time division control algorithm 1000 are applicable.
[0070] 时分调节算法1000还包括校准目标数据的可选操作1018。 [0070] 1000 division adjustment algorithm also includes an optional calibration operation target data 1018. 在至少一个实施例中，光传感器920对温度变化敏感，温度变化影响提供的感测信号SENj^值的准确性。 In at least one embodiment, the light sensor 920 pairs sensitive to temperature changes, the accuracy of the sensed signal provided by temperature changes SENj ^ values. 例如，在至少一个实施例中，当光传感器920的温度升高时，对于光传感器920接收的相同亮度水平的光922，感测信号SEN1的值变化。 For example, in at least one embodiment, the optical sensor 920 when the temperature rises, the same luminance level of the light sensor 920 receives the light 922, the value of the variation sensing signal SEN1. 然而，在至少一个实施例中，光传感器920的温度变化和感测信号间的关系是已知的。 However, in at least one embodiment, the relationship between the temperature sensing signal and the light sensor 920 is known. 在至少一个实施例中，光传感器920给控制器912提供温度信息，或者控制器912感测光传感器920内部或附近的温度。 In at least one embodiment, the light sensor 920 provides temperature information to the controller 912, or 920 or near the temperature controller 912 senses the light sensor. 通过使用该关系，控制器912相应地校准目标数据，来补偿温度对感测信号SENj^值的准确性的影响。 By using this relationship, the target controller 912 corresponding calibration data to compensate for the effect of temperature on the accuracy of the sensed signal value of SENj ^. 在至少一个实施例中，光传感器920自补偿温度变化，因此，不需要可选的操作1018。 In at least one embodiment, the optical sensor 920 changes from the temperature compensation thus does not require the optional handle 1018. 在至少一个实施例中，在时分调节算法1000中，温度对感测信号SEN1的值的准确性的影响可忽略或不考虑。 In at least one embodiment, the adjustment algorithm in a time-division 1000, the effect of temperature on the accuracy of the value of the sensing signal SEN1 or not considered negligible. 也可以调节目标数据，来补偿与光传感器920相关的操作特性。 Target data may also be adjusted to compensate for operating characteristics associated with the optical sensor 920. 例如，在至少一个实施例中，广谱光传感器920执行的接收在光谱上是不一致的。 For example, in at least one embodiment, the broad spectrum light receiving sensor 920 performs spectrally inconsistent. 可以调节目标数据以解决该不一致性。 Target data can be adjusted to resolve the inconsistency. 在至少一个实施例中，由灯402的制造商或分销商在校准测试过程中进行调节。 , Be adjusted during the calibration test in at least one embodiment, by the lamp manufacturer or distributor 402.
[0071] 时分调节算法1000代表时分调节算法的一个实施例，其可以用来感测并在适当时调节照明系统900中一个或多个LED的亮度。 [0071] Representative division division control algorithm 1000 of one embodiment of control algorithm, which may be used to sense and adjust the lighting system 900 or a plurality of luminance LED where appropriate. 照明系统900可以使用的时分调节算法的次数实际上是无限的。 Frequency division illumination system 900 may adjust the algorithm used is virtually unlimited. 例如，可以为LED 904,906和908中每一个执行操作1006和1008，为LED 904、906和908中的每一个存储感测信号SEN1，并为LED 904、906和908中的每一个重复操作1010和1012。 For example, each of which performs operations 1006 and 1008 for the LED 904,906 and 908, for each memory sensing signal SEN1 LED 904,906, and 908, and 1010, and repeat the operation for each LED 904,906, and 908 1012. 此外，在间隔时分1100中，时分功率调制的功率降低的时间间隔，诸如tjP t 1、扒和13之间的时间间隔等等，与设计选择有关，功率降低的范围与设计选择有关。 Further, in time division interval 1100, the power division to reduce power modulation time interval, such as tjP t 1, Pa, and the time interval between the 13 and the like, design choice, power reduction range of design choice. 在至少一个实施例中，功率降低的时间间隔小于人们通过觉察照明系统900的亮度变化从而觉察到功率降低的时间量。 In at least one embodiment, the time interval is less than the power reduction people perceive luminance change 900 to thereby decrease the amount of time the power perceived by the illumination system.
[0072] 图12描绘LED电流驱动的时序图1200。 [0072] FIG. 12 depicts a timing chart of the LED drive current 1200. 时序图1200图解说明分散(interspersed)时分，其代表时分功率调制方案的另一实施例。 Timing diagram 1200 illustrates the dispersion (Interspersed) division, which represents a further power division modulation scheme embodiment. 除对于不同LED的功率降低之间的定时明显显示为随时间分散之外，时序图1200类似于间隔时分1100。 In addition to the timing among different power of the LED display is significantly reduced than dispersed over time, a timing diagram 1200 is similar to 1100 hours of interval. 如同时分调节算法1000与间隔时分1100 —起作用一样，时分调节算法1000相同地与分散时分1200一起作用。 As with the division interval division adjustment algorithm 1000 1100-- acts as a time division regulation algorithm 1000 with the same dispersion with 1200 division. 使用分散的时分1200会延长在驱动电流i_—R、iLEDJ;iP i B减小之间的时间，从而降低在执行时分调节算法1000时改变光926的亮度的可觉察性。 1200 using a dispersion time division will extend in driving current i_-R, iLEDJ; iP i B decreases between time, thereby reducing the perceived change adjustment of the brightness of the light 926 when performing time division algorithm 1000.
[0073] 图13描绘LED电流驱动的时序图1300。 [0073] Figure 13 depicts a timing chart of the LED current driver 1300. 时序图1300图解说明单一(unitary)时分，其代表时分功率调制方案的又一实施例。 1300 illustrates a timing diagram of a single (unitary) division, which represents a further power division modulation scheme embodiment. 时序图1300中的单一时分在相应周期t2-t3、t6-t7^P 1415中每次一个地减小送到LED 904,906和908的电流。 1300 single timing chart division in the respective period t2-t3, t6-t7 ^ P 1415 each time a reduced current to the LED 904,906 and 908. 图14描绘用于实现单一时分的时分调节算法1400。 Figure 14 depicts the division for implementing a single time-division control algorithm 1400. 在至少一个实施例中，为了利用单一时分，修改时分调节算法1000，以例如包括操作1402-1406。 In at least one embodiment, to use a single time division, time division modified control algorithm 1000, for example, includes an operation 1402-1406. 在操作1006中，时分模块924根据LED电流驱动时序1300调制送到LED 904、906和908的功率。 In operation 1006, the time-division module 924 to the LED 904, 906 and 908 power the LED current modulation drive timing 1300. 操作1402对于送到LED904、906和908的每个功率降低，将感测信号SENj^每个值存储在控制器912中或控制器912可访问的存储器(未显示)中。 For LED904,906 operation 1402 to 908 and each of the power reduction, SENj ^ sensing signal value stored in the memory of each controller 912 or the controller 912 can access (not shown). 在操作1008中为在时刻t2-t3中感测的亮度水平产生感测信号SEN113操作1404使操作1006、1008和1402重复，直到在操作1008中为在时刻丨6-丨7和14_t5中感测的亮度水平产生感测信号SENid In operation 1008 to generate a sensing signal in operation 1404 SEN113 luminance level sensed time t2-t3 the operator 1006,1008 and 1402 are repeated until in operation 1008 as Shu Shu 6- and 7 at time sensing 14_t5 brightness level generates a sensing signal SENid
[0074] —旦在每个功率调制周期t2_t3、t6_t#P 14_t5中确定亮度水平，控制器912在操作1406中确定LED 904,906和908中每一个的亮度。 [0074] - Once the power in each modulation period t2_t3, t6_t # P 14_t5 luminance level is determined, the controller 912 determines a luminance of each LED 904,906, and 908 in operation 1406. 存储的感测信号SEN1的每个值代表环境光的亮度和LED 904、906和908中的两个的影响，这在方程式[I]中列出: Sensing signal SEN1 each stored value represents the influence of ambient light and the brightness of LED 904,906, and 908 of the two, which are listed in Equation [I] in which:
[0075] SEN1= BAL+BLEDx+BLEDy [I], [0075] SEN1 = BAL + BLEDx + BLEDy [I],
[0076] 其中BAL =环境光的亮度，BLEDx和BLEDy等于在操作1006中LED904、906和908中的功率不降低的两个LED的相应亮度影响。 [0076] BAL = where the luminance of ambient light, BLEDx and BLEDy equal to the corresponding operation in the brightness of the LED904,906 1006 and 908 without reducing the power of the two LED's. 由于环境光BAL的亮度通过操作1002和1004已知，在至少一个实施例中，控制器912通过利用方程式[I]的3个实例，使用多变量线性方程求解过程，来求解操作1402中存储的感测信号SENj^ 3个值。 Since the brightness of ambient light by operation of BAL 1002 and 1004 is known, in at least one embodiment, the controller 912 Example 3 by using the equation [I] using a multivariable linear equation solving process to solve operation stored 1402 SENj ^ 3 sensing signal values. 具体的线性方程求解过程与设计选择有关。 Specific linear equation solving process of design choice. 例如，在时刻t3: For example, at time t3:
[0077] SEN1= BAL+BLED906+BLED908 [2]， [0077] SEN1 = BAL + BLED906 + BLED908 [2],
[0078] 在时刻t6: [0078] At time t6:
[0079] SEN1= BAL+BLED904+BLED906 [3]， [0079] SEN1 = BAL + BLED904 + BLED906 [3],
[0080] 在时刻t7: [0080] At time t7:
[0081] SEN1= BAL+BLED904+BLED908 [4], [0081] SEN1 = BAL + BLED904 + BLED908 [4],
[0082] 由于BAL和SEN^值已知，方程式[2]可根据BLED908求解，得到BLED906，再代入方程式[3]中。 [0082] Since the BAL and SEN ^ values ​​are known, Equation [2] can be solved according to BLED908 give BLED906, and then substituting into Equation [3]. 在代入之后，方程式[3]可根据BLED908求解，并代入方程[4]中。 After substituting equation [3] can be solved according to BLED908, and substituting into equation [4]. 在代入之后，方程式[4]可求解，得到BLED908的值。 After substituting equation [4] may be solved to obtain the value of BLED908. 通过BLED908的值，可以通过方程式[2]及之后通过方程式[3]求解BLED906和BLED904。 A value BLED908 can be produced by Equation [2], and then by Equation [3] and solving BLED906 BLED904.
[0083] 图15描绘控制器1500，其代表控制器912的一个实施例。 [0083] FIG. 15 depicts a controller 1500, which represents one embodiment of the controller 912. 控制器1500包括用于产生相应控制信号CS1。 The controller 1500 includes means for generating a respective control signal CS1. 和CS 1N的控制信号发生器1502.0-1502.N和脉冲宽度调制器1504.0-1504.No在至少一个实施例中，控制信号发生器1502.0-1502.N和脉冲宽度调制器1504.0-1504.N中的每一个根据时分调节算法1000或时分调节算法1400操作，以确定具有不同光谱的至少两个LED的光的亮度，并根据与代表LED的目标亮度的目标数据值1506的值的比较来调节亮度。 1502.0-1502.N and CS control signal generator and a pulse width modulator with 1N 1504.0-1504.No at least one embodiment, the control signal generator and a pulse width modulator 1502.0-1502.N in 1504.0-1504.N each control algorithm 1000 according to time division or time division operation of control algorithm 1400, in order to determine the brightness of the LED having at least two different spectra of light, and the brightness is adjusted based on a comparison with a target value 1506 LED luminance representative value of target data . 在Melanson II中示意性描述了一般使用脉冲宽度调制控制信号CS1。 In Melanson II schematically describes the general use of pulse width modulated control signal CS1. 和CS 1N来调节送到LED的电流。 CS 1N and adjust the current supplied to the LED. 在至少一个实施例中，控制信号发生器1502.0-1502.N使控制信号CS1。 In at least one embodiment, the control signal generator 1502.0-1502.N control signal CS1. 和CS 1N在操作1002(图10和图14)中的环境光感测过程中没有脉冲。 And CS 1N ambient light sensing process operation 1002 (FIG. 10 and FIG. 14) in the absence of a pulse.
[0084] 因此，照明系统包括针对不同光谱的发光二极管(LED)的时分光输出感测调节。 [0084] Thus, the light output of the illumination system comprising a time division sensing adjust for different spectral light emitting diode (LED) that is. 在至少一个实施例中，时分光输出感测调节允许照明系统分别调节LED的亮度，以考虑环境光以及LED的亮度变化。 In at least one embodiment, the light output of the time division sensing system allows the illumination adjustment of LED brightness are adjusted to account for changes in ambient light, and the brightness of the LED.
[0085] 尽管已经详细描述了本发明，但应理解，在不偏离如所附权利要求书限定的本发明的精神和范围的情况下，可以对其进行各种变化、替代和更改。 [0085] Having described the invention in detail, it should be understood that, in the case of not departing from the spirit and scope of the book as defined in the appended claims the invention may be made various changes, substitutions and alterations.
1.一种用于控制至少一个LED的设备，包括: 控制器，所述控制器配置成耦连到传感器和灯的第一LED，其中所述控制器进一步配置成: I.降低送到与所述控制器耦连的第一 LED的功率至大于零的值； i1.在送到所述第一 LED的功率降低时，接收来自所述传感器的指示由所述传感器接收的光的亮度的信号；和ii1.根据亮度相关目标值和由来自所述传感器的信号所指示的所述亮度调节所述第一LED的亮度。 1. A method for controlling the at least one LED, comprising: a controller configured to be coupled to the first sensor and the LED lamp, wherein the controller is further configured: to reduce and I. the controller is coupled to the first power of the LED to a value greater than zero;. i1 when the first LED to the power reduction, brightness of the light received by the sensor receiving indication from the sensor signal; ii1 and adjusting the brightness of the first LED and the target value related to the luminance by a luminance signal from the sensor as indicated.
2.根据权利要求1所述的设备，其中所述控制器配置成接收来自光传感器的指示环境光的亮度的传感信号，并调整所述LED的亮度以补偿所述环境光。 2. The apparatus according to the luminance according to claim 1, wherein said controller is configured to receive an indication of the luminance of the ambient light sensing signal from the light sensor, and the LED is adjusted to compensate for the ambient light.
3.根据权利要求1所述的设备，其中降低送到所述第一 LED的功率包括减小送到所述第一LED的电流。 3. The apparatus according to claim 1, wherein the power of the LED to the first reduction comprises reducing the current to the first LED.
4.根据权利要求1所述的设备，其中所述控制器被进一步配置成使多个控制器同步，其中多个控制器中每一个控制器配置成: 1.在耦连到其它控制器中每一个控制器的LED的功率降低的相同时间段中，降低送到与所述控制器耦连的LED的功率； ϋ.在耦连到所述控制器的LED的功率降低时，接收来自传感器的指示所述传感器接收的光的亮度的信号；和ii1.根据亮度相关目标值，调节耦连到所述控制器的LED的亮度。 4. The apparatus according to claim 1, wherein the controller is further configured to synchronize a plurality of controllers, wherein the plurality of controllers each controller is configured to: 1. coupled to the other controllers in the same time reduce the power of the LED for each controller, to reduce the power of the LED is coupled to the controller; ϋ when the LED coupled to the power controller decreases received from the sensor. a signal indicative of the brightness of the light received by the sensor; and ii1 relevant target according to the brightness, adjust the brightness of the LED is coupled to the controller.
5.根据权利要求1所述的设备，其中所述控制器进一步配置成: I.接收指示在第一时间接收的光的亮度的第一信号； II.接收指示在第二时间接收的光的亮度的第二信号，其中所述第一LED和一个第二LED对亮度的相对影响在所述第一时间和所述第二时间是不同的，并且其中所述第一LED发射的光具有与所述第二LED发射的光不同的光谱； ii1.使用所述信号中的信息，确定所述第一 LED发射的光的亮度和所述第二LED发射的光的亮度；和iv.根据一个或多个亮度相关目标值，调节所述第一 LED发射的光的亮度和所述第二LED发射的光的亮度。 5. The apparatus according to claim 1, wherein the controller is further configured to: I. receiving a luminance signal indicating a first time of receiving the first light; II indicating light received at a second time received. a second luminance signal, wherein the first LED and a second LED brightness relative effect on at the first time and the second time are different, and wherein said first LED emits light having a the second LED emits light of different spectra;. II1 signal using the information, determines the brightness of the light emitted from the first LED and the brightness of light emitted by the second LED;. and iv according to one or more relevant target luminance, adjust the brightness of the light emitted from the first LED and the second brightness of light emitted by the LED.
6.根据权利要求5所述的设备，其中所述第一 LED和所述第二LED是由以下各项组成的组中的成员:红色和绿色、红色和黄色、琥珀色和蓝色、绿色和蓝色以及红色和蓝色。 6. The apparatus as claimed in claim 5, wherein the first LED and the second LED is a group consisting of the members: red and green, red and yellow, amber and blue, green and blue and red and blue.
7.根据权利要求5所述的设备，其中所述第一 LED是具有近似相同光谱的第一组多个LED的成员，所述第二LED是具有近似相同光谱的第二组多个LED的成员。 7. The apparatus according to claim 5, wherein the first LED is a plurality of members of the first group of LED have approximately the same spectrum, a second group of the second LED is a plurality of LED have approximately the same spectrum member.
8.根据权利要求5所述的设备，其中所述控制器进一步配置成: 调节所述第一LED和所述第二LED的亮度，以补偿随着时间过去的(a)LED发热和(b)光输出变化中的至少一个。 8. The apparatus according to claim 5, wherein the controller is further configured to: adjust the first LED and the second LED brightness over time to compensate for the (A) and the heat generating LED (b ) variation in light output of at least one.
9.根据权利要求5所述的设备，其中所述传感器中的至少一个是广谱光传感器。 9. The apparatus according to claim 5, wherein at least one of the sensors is a broad-spectrum photosensor.
10.根据权利要求9所述的设备，其中单个广谱传感器提供指示所述第一时间和所述第二时间的亮度的信号。 10. The apparatus according to claim 9, wherein the sensor provides a single broad-spectrum luminance signal indicative of said first time and said second time.
11.根据权利要求5所述的设备，其中所述控制器进一步配置成: 调制送到所述第一LED和所述第二LED的电流，使得对由所述一个或多个传感器接收的光的亮度的相对影响在所述第一时间和所述第二时间是不同的。 11. The apparatus according to claim 5, wherein the controller is further configured to: modulate the current to the first LED and the second LED, such that by the one or more sensors for receiving light Effect of relative luminance at the first time and the second time are different.
12.根据权利要求11所述的设备，其中调制送到所述第一 LED和所述第二LED的电流包括: 在所述第一时间中，向所述第一LED提供低于所述第二LED的平均电流。 12. The apparatus of claim 11, wherein the modulation to the first LED and the second LED current comprising: at the first time, is lower than the second to the first LED to provide two average current of the LED.
13.根据权利要求11所述的设备，其中调制送到所述第一 LED和所述第二LED的电流包括: 在连续时间中调制送到所述第一LED和所述第二LED的电流。 13. The apparatus of claim 11, wherein the modulation to the first LED and the second LED current comprising: a continuous time modulator to the first LED and the second LED current .
14.根据权利要求11所述的设备，其中调制送到所述第一 LED和所述第二LED的电流包括: 在时间上分散送到所述第一LED和所述第二LED的电流的减小。 14. The apparatus of claim 11, wherein the modulation to the first LED and the second LED current comprising: dispersing in time to the first LED and the second LED current decreases.
15.一种用于控制至少一个LED的设备，包括: 具有至少第一LED的灯； 感测接收的光的亮度的传感器；和耦连到所述灯和所述传感器的控制器，其中所述控制器配置成: I.降低送到所述第一LED的功率至大于零的值； ϋ.在送到所述第一LED的功率降低时，接收来自所述传感器的指示由所述传感器接收的光的亮度的信号；和ii1.根据亮度相关目标值和由来自所述传感器的信号所指示的所述亮度，调节所述第一LED的亮度。 A control apparatus for at least one LED, comprising: at least a first LED lamp; a sensor sensing the brightness of the received light; and a controller coupled to the lamp and the sensor, wherein said controller is configured to: I. reducing power to the first LED to a value greater than zero; ϋ when the first LED to reduce the power received by the sensor from the sensor indicative. luminance signal of the received light;. ii1 and the luminance and the luminance target value by the correlation signal from the sensor as indicated, adjusting the brightness of the first LED.
16.根据权利要求15所述的设备，其中所述控制器配置成接收来自光传感器的指示环境光的亮度的传感信号，并调整所述LED的亮度以补偿所述环境光。 16. The apparatus according to the luminance according to claim 15, wherein the controller is configured to receive an indication of the luminance of the ambient light sensing signal from the light sensor, and the LED is adjusted to compensate for the ambient light.
17.根据权利要求15所述的设备，其中降低送到所述第一 LED的功率包括减小送到所述第一LED的电流。 17. The apparatus according to claim 15, wherein the first LED to reduce the power comprises reducing a current to the first LED.
18.根据权利要求15所述的设备，其中所述控制器被进一步配置成使多个控制器同步，其中多个控制器中每一个控制器配置成: I.在耦连到其它控制器中每一个控制器的LED的功率降低的相同时间段中，降低送到与所述控制器耦连的LED的功率； ϋ.在耦连到所述控制器的LED的功率降低时，接收来自传感器的指示所述传感器接收的光的亮度的信号；和ii1.根据亮度相关目标值，调节耦连到所述控制器的LED的亮度。 I. In other controllers coupled to: 18. The apparatus according to claim 15, wherein the controller is further configured to synchronize a plurality of controllers, wherein the plurality of controllers each controller is configured to in the same time reduce the power of the LED for each controller, to reduce the power of the LED is coupled to the controller; ϋ when the LED coupled to the power controller decreases received from the sensor. a signal indicative of the brightness of the light received by the sensor; and ii1 relevant target according to the brightness, adjust the brightness of the LED is coupled to the controller.
19.根据权利要求15所述的设备，其中所述控制器被进一步配置成: I.接收指示在第一时间接收的光的亮度的第一信号； ϋ.接收指示在第二时间接收的光的亮度的第二信号，其中所述第一LED和一个第二LED对亮度的相对影响在所述第一时间和所述第二时间是不同的，其中所述第一LED发射的光具有与所述第二LED发射的光不同的光谱； ii1.使用所述信号中的信息，确定所述第一 LED发射的光的亮度和所述第二LED发射的光的亮度；和iv.根据一个或多个亮度相关目标值，调节所述第一 LED发射的光的亮度和所述第二LED发射的光的亮度。 19. The apparatus according to claim 15, wherein the controller is further configured to:. I. receiving a first signal indicative of the brightness of the light received at a first time; ϋ receiving an indication of the received light at a second time a second luminance signal, wherein the first LED and a second LED brightness relative effect on at the first time and the second time are different, wherein said first LED emits light having a the second LED emits light of different spectra;. II1 signal using the information, determines the brightness of the light emitted from the first LED and the brightness of light emitted by the second LED;. and iv according to one or more relevant target luminance, adjust the brightness of the light emitted from the first LED and the second brightness of light emitted by the LED.
20.一种用于光捕获的方法，包括: 降低送到第一LED的功率至大于零的值； 在送到所述第一LED的功率降低时，接收指示光的亮度的信号；和根据亮度相关目标值和由所述信号指示的所述亮度调节所述第一LED的亮度。 20. A method for capturing light, comprising: reducing the power to the first LED to a value greater than zero; and when the first LED to the power reduction, a luminance signal indicative of the received light; and in accordance with Related luminance target value indicated by the signal and the brightness adjustment of the brightness of the first LED.
21.根据权利要求20所述的方法，其中所述方法进一步包括: 接收来自光传感器的指示环境光的亮度的传感信号；以及调整所述LED的亮度以补偿所述环境光。 21. The method of claim 20, wherein the method further comprises: receiving an indication of the luminance of ambient light sensing signal from the light sensor; and adjusting the brightness of the LED to compensate for the ambient light.
22.根据权利要求20所述的方法，其中降低送到所述第一 LED的功率包括减小送到所述第一LED的电流。 22. The method of claim 20, wherein the first LED to reduce the power comprises reducing the current to the first LED.
23.根据权利要求20所述的方法，进一步包括: 同步操作多个控制器，其中同步操作多个控制器包括: 在耦连到其它控制器中的每一个控制器的LED的功率降低的相同时间段中，降低送到与所述控制器耦连的LED的功率； 在耦连到所述控制器的LED的功率降低时，接收来自传感器的指示所述传感器接收的光的亮度的信号；和根据亮度相关目标值，调节耦连到所述控制器的LED的亮度。 23. The method according to claim 20, further comprising: a plurality of synchronous operation controller, wherein the plurality of synchronous operation controller comprising: an LED coupled to a power controller of each of other controllers of the same reduction time period, to reduce the power of the LED is coupled to the controller; when coupled to the controller to reduce the power of the LED, the light receiving sensor from the sensor indicative of the received luminance signal; the brightness target values ​​and associated, coupled to adjust the brightness of the LED controller.
24.根据权利要求20所述的方法，进一步包括: 接收指示在第一时间接收的光的亮度的第一信号； 接收指示在第二时间接收的光的亮度的第二信号，其中所述第一LED和一个第二LED对亮度的相对影响在所述第一时间和所述第二时间是不同的，其中所述第一LED发射的光具有与所述第二LED发射的光不同的光谱； 使用所述信号中的信息，确定所述第一LED发射的光的亮度和所述第二LED发射的光的亮度；和根据一个或多个亮度相关目标值，调节所述第一LED发射的光的亮度和所述第二LED发射的光的亮度。 24. The method of claim 20, further comprising: receiving a first signal indicative of a luminance of light received at a first time; receiving a signal indicative of a second time at a second brightness of light received, wherein said first a LED and a second LED brightness relative effect on at the first time and the second time are different, wherein the first LED emits light having a different spectrum of light emitted by the LED to the second ; using the information signal, determining the brightness of the light emitted from the first LED and the brightness of light emitted by the second LED; and luminance in accordance with one or more associated target value, adjusting the first LED emits and the luminance of the luminance of the light emitted by the second LED light.
25.根据权利要求24所述的方法，其中所述第一 LED和所述第二LED是由以下各项组成的组中的成员:红色和绿色、红色和黄色、琥珀色和蓝色、绿色和蓝色以及红色和蓝色。 25. The method of claim 24, wherein the first LED and the second LED is a group consisting of the members: red and green, red and yellow, amber and blue, green and blue and red and blue.
26.根据权利要求24所述的方法，其中所述第一 LED是具有近似相同光谱的第一组多个LED的成员，所述第二LED是具有近似相同光谱的第二组多个LED的成员。 26. The method according to claim 24, wherein the first LED is a plurality of members of the first group of LED have approximately the same spectrum, a second group of the second LED is a plurality of LED have approximately the same spectrum member.
27.根据权利要求24所述的方法，进一步包括: 调节所述第一LED和所述第二LED的亮度，以补偿随着时间的过去的(a)LED发热和(b)光输出变化中的至少一个。 27. The method of claim 24, further comprising: adjusting the first LED and the second LED brightness to compensate Over the (A) heating LED and (b) a change in the optical output of the time at least one.
28.根据权利要求23所述的方法，其中至少一个所述传感器是广谱光传感器。 28. The method according to claim 23, wherein the at least one of the sensors is a broad-spectrum photosensor.
29.根据权利要求28所述的方法，其中单个广谱传感器提供指示所述第一时间和所述第二时间的亮度的信号。 29. The method of claim 28, wherein a single sensor providing a signal indicative of the broad spectrum of the first time and the second time of luminance.
30.根据权利要求24所述的方法，进一步包括: 调制送到所述第一LED和所述第二LED的电流，使得对所述一个或多个传感器接收的光亮度的相对影响在所述第一时间和所述第二时间是不同的。 30. The method of claim 24, further comprising: a modulation to the first LED and the second LED current, so that the relative influence of the one or more sensors in the brightness of a first time and the second time are different.
31.根据权利要求30所述的方法，其中调制送到所述第一 LED和所述第二LED的电流包括: 在所述第一时间中，向所述第一LED提供低于所述第二LED的平均电流。 31. The method according to claim 30, wherein the modulation to the first LED and the second LED current comprising: at the first time, is lower than the second to the first LED to provide two average current of the LED.
32.根据权利要求30所述的方法，其中调制送到所述第一 LED和所述第二LED的电流包括: 在连续时间中调制送到所述第一LED和所述第二LED的电流。 32. The method according to claim 30, wherein the modulation to the first LED and the second LED current comprising: a continuous time modulation current to the second LED of the first LED and the .
33.根据权利要求30所述的方法，其中调制送到所述第一 LED和所述第二LED的电流包括: 在时间上分散送到所述第一LED和所述第二LED的电流的减小。 33. The method according to claim 30, wherein the modulation to the first LED and the second LED current comprising: dispersing in time to the first LED and the second LED current decreases.
34.一种用于光捕获的设备，包括: 用于降低送到第一LED的功率至大于零的值的装置； 用于在送到所述第一LED的功率降低时接收指示光的亮度的信号的装置；和用于根据亮度相关目标值和由来自传感器的信号所指示的所述亮度调节第一LED的亮度的装置。 34. An apparatus for capturing light, comprising: a first means to a value greater power of the LED is reduced to zero; means for receiving an indication of the luminance of the light to the first LED when the reduction in power It means a signal; and a luminance according to the luminance and a target value related signal from the sensor means instructed first LED luminance adjustment.
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