WO2014108103A2 - 交流高压多段分区驱动光源装置及其方法 - Google Patents

交流高压多段分区驱动光源装置及其方法 Download PDF

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WO2014108103A2
WO2014108103A2 PCT/CN2014/070540 CN2014070540W WO2014108103A2 WO 2014108103 A2 WO2014108103 A2 WO 2014108103A2 CN 2014070540 W CN2014070540 W CN 2014070540W WO 2014108103 A2 WO2014108103 A2 WO 2014108103A2
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segment
voltage
led lamp
mos tube
turn
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PCT/CN2014/070540
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English (en)
French (fr)
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WO2014108103A3 (zh
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严伯勤
商建欣
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深圳普益照明科技有限公司
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Publication of WO2014108103A2 publication Critical patent/WO2014108103A2/zh
Publication of WO2014108103A3 publication Critical patent/WO2014108103A3/zh
Priority to US14/799,117 priority Critical patent/US20160037595A1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the invention relates to the field of illumination, in particular to an AC high-voltage multi-segment partition driving light source device and a method thereof.
  • LED light sources are widely used in the lighting industry, especially in backlights for liquid crystal displays, street lighting and household appliances.
  • the AC input voltage and the AC input current generated by the power source usually need to be in the constant current region, as shown in FIG. 7, in the shaded area in the figure, the light source can work normally, and the power source is from the power source.
  • the working relationship between voltage and time is a sinusoidal waveform, and the square wave region in the sinusoidal waveform is a conduction region, that is, a working region of the LED light source (also referred to as a constant current region).
  • the power of these light sources is relatively large, and the operating current of the LED lamp is generally about 20 mA.
  • the first mode is as shown in Fig. 8.
  • the duty ratio of the LED light source is increased, although this form achieves a long circuit opening time.
  • the performance of the machine is improved, but the reactive power consumption area is very large, so the power of the light source is small;
  • the second way is as shown in Figure 9, reducing the duty cycle, although the reactive power consumption area is reduced, but the LED light source Working hours are extremely short and can't be beneficial.
  • the existing light source driving device has been unable to meet the market demand.
  • the present invention provides an AC high-voltage multi-segment partition driving light source device and method thereof with simple structure, high power and high working efficiency, and effectively achieves maximum conduction area and minimizes power consumption area. Effect.
  • the present invention provides an AC high-voltage multi-segment partition driving light source device, comprising a power supply, a signal control module, an n-stage constant current driving module, n mos tubes and n-segment LED lamps, wherein n is equal to or greater than 2 a natural number;
  • the signal control module is provided with an input end and n output ends, wherein the power source is electrically connected to the input end of the signal control module and the n-segment LED lamp, respectively, the constant current drive module and each mos tube One-to-one correspondence, the first segment to the m segment
  • the LED lamps are electrically connected in series with the mth mos tube, where m is a natural number less than or equal to n.
  • the signal control module is provided with a voltage detecting unit for detecting a turn-on voltage.
  • the power supply is provided with a bridge rectifier for receiving an alternating voltage and supplying an alternating voltage to each segment of the LED lamp.
  • the LED lamps on the segments and the LED lamps are connected in series.
  • the present invention also provides an AC high-voltage multi-segment partition driving light source method, comprising the following steps:
  • the first to the mth LED lamps are connected in series and then energized by the mth mos tube.
  • the voltage detecting unit on the signal control module respectively detects the turn-on voltage of each segment of the LED lamp.
  • the method further comprises a step of: converting the alternating voltage on the power source through the bridge rectifier, and then dividing the voltage to the LED lamps of the segments.
  • the LED lamp comprises a first segment of the LED lamp, a second segment of the LED lamp, a third segment of the LED lamp and a fourth segment of the LED lamp; the working steps are as follows:
  • A1 when the voltage rises to the turn-on voltage of the first LED lamp, after the signal control module detects the turn-on voltage, the signal is transmitted to the first constant current driving module, and the first constant current driving
  • the module conducts a first mos tube connected in series with the first OLED tube, and the first stage LED lamp is energized by conduction with the first mos tube;
  • the fourth-stage constant current driving module when the voltage rises to the turn-on voltage of the fourth LED lamp, after the signal control module detects the turn-on voltage, the signal is transmitted to the fourth-stage constant current driving module, and the fourth-stage constant current driving
  • the module conducts a fourth mos tube connected in series, the third mos tube is closed, and the first segment of the LED lamp, the second segment of the LED lamp, the third segment of the LED lamp, and the fourth segment of the LED lamp pass through The fourth mos tube is energized to work.
  • the AC high-voltage multi-segment partition driving light source device and the method thereof provide the LED lamp into a plurality of segments, when the voltage rises to a required turn-on voltage of a certain segment of the LED lamp
  • the signal control module outputs a signal to the constant current driving module of the segment, and the constant current driving module of the segment turns on the mos tube connected thereto, and at the same time, the previous mos tube stops working, and the constant current driving module of the segment passes
  • the mos tube supplies power to the LED lamp of the first segment to the segment, and the LED lamp of the first segment to the segment is turned on, effectively increasing the work efficiency of the LED light source during the same working time.
  • the invention divides the LED light source into multiple sections according to the power of the conduction zone and the need of taking into account the distribution of the LED light source, and the work process is automated, no manual control is needed, and the effect of the higher the segmentation efficiency is realized, and the guide is realized.
  • the maximization of the pass zone and the minimization of the no-light consumption zone improve the power supply efficiency, extend the service life of the LED lamp, and improve the power supply efficiency of the power plant.
  • FIG. 1 is a schematic structural view of an AC high-voltage multi-segment partition driving light source device and a method thereof according to the present invention
  • Figure 7 is a graph of current versus voltage
  • Figure 8 is a diagram showing the relationship between the first voltage and time in the prior art
  • Figure 9 is a diagram showing the relationship between the second voltage and time in the prior art.
  • the first stage constant current drive module 13 The second stage constant current drive module
  • the AC high-voltage multi-segment partition driving light source device of the present invention comprises a power source 10, a signal control module 11, an n-stage constant current driving module, n mos tubes and n-segment LED lamps, wherein n is equal to or greater than 2.
  • the natural number; the signal control module 11 is provided with an input end and n output ends, and the power source 10 is electrically connected to the input end of the signal control module 11 and the n-segment LED lamp, respectively, and each segment of the constant current drive module has a one-to-one correspondence with each mos tube.
  • n mos tubes In series, from the first segment to the m segment The LED lamps are electrically connected in series with the mth mos tube, where m is a natural number less than or equal to n.
  • the logical working relationship of the above n mos tubes is as follows: 1) first triggering the first conduction; 2) after the rear triggering, the previous mos tube is automatically turned off before the conduction; 3) only one section is allowed to be turned on.
  • each segment of the LED lamp requires the power supply 10 to provide a constant current under the condition of stable voltage, so the waveform turned on here is a square wave, even if the conduction voltages of the segments are equal, the LED lamps of each segment
  • the number of the same is the square wave superimposed one by one, and the underlying duty cycle is the largest and the top layer is the smallest. Since the length of each segment of the on-time (duty cycle) is different, the amount of work performed by each segment of the LED lamp is also different.
  • the signal control module 11 is provided with a voltage detecting unit (not shown) for detecting the turn-on voltage.
  • the power supply 10 is provided with a bridge rectifier (not shown) for receiving the AC voltage and supplying the AC voltage to each segment of the LED lamp.
  • the AC high voltage in the power source 10 is processed by a bridge rectifier (not shown). Used for each segment of LED lights.
  • the LED lamps on each segment are connected in series with the LED lamps.
  • the AC high voltage multi-segment partition driving light source method of the invention comprises the following steps:
  • the first step is to divide the LED lamp into n segments and turn on the work, and determine the turn-on voltage required for each segment of the LED lamp, where n is a natural number equal to or greater than 2;
  • Step 2 When the voltage rises to the ON voltage of the mth segment LED lamp, after the signal control module 11 detects the conduction voltage, the signal is transmitted to the mth constant current driving module, and the mth segment constant current driving module Turning on the mth mos tube in series with it, the m-1th mos tube is closed; wherein m is a natural number less than or equal to n;
  • the third step the first segment to the mth segment of the LED lamp are connected in series and then turned on after the mth mos tube is turned on.
  • a voltage detecting unit (not shown) on the signal control module 11 detects the turn-on voltage of each segment of the LED lamp.
  • a step is further included in which the AC voltage on the power source 10 is converted by a bridge rectifier (not shown) and then divided into LED lamps of the respective segments.
  • the LED lamp includes a first segment of the LED lamp 16, a second segment of the LED lamp 17, a third segment of the LED lamp 18 and a fourth segment of the LED lamp 19; the working steps are as follows:
  • the first step when the voltage rises to the turn-on voltage of the first LED lamp 16, the signal control module 11 detects the turn-on voltage, and transmits the signal to the first-stage constant current driving module 12, the first constant current
  • the driving module 12 turns on the first mos tube 20 connected in series with the first OLED tube 20 through the conduction of the first mos tube 20;
  • the second step when the voltage rises to the turn-on voltage of the second LED lamp 17, the signal control module detects 11 to the turn-on voltage, and transmits the signal to the second constant current driving module 13, the second constant current
  • the driving module 13 is connected to the second mos tube 21 connected in series, the first mos tube 20 is closed, and the first segment of the LED lamp 16 and the second segment of the LED lamp 17 are electrically connected through the second mos tube 21 ;
  • the third step when the voltage rises to the turn-on voltage of the third LED lamp 18, after the signal control module 11 detects the turn-on voltage, the signal is transmitted to the third-stage constant current driving module 14, and the third constant current
  • the driving module 14 is connected to the third mos tube 22 connected in series, the second mos tube 21 is closed, and the first segment of the LED lamp 16, the second segment of the LED lamp 17 and the third segment of the LED lamp 18 are connected through the third
  • the mos tube 22 is turned on and energized;
  • the fourth step when the voltage rises to the turn-on voltage of the fourth LED lamp 19, after the signal control module 11 detects the turn-on voltage, the signal is transmitted to the fourth-stage constant current driving module 15, and the fourth constant current
  • the driving module 15 is connected to the fourth mos tube 23 connected in series, and the third mos tube 22 is closed.
  • the first segment of the LED lamp 16, the second segment of the LED lamp 17, the third segment of the LED lamp 18 and the fourth segment of the LED are connected in series.
  • the lamps 19 are all energized by the fourth mos tube 23.
  • the signal control module 11 automatically detects the on-voltage, and the first, second, Third, the four mos tubes will be turned on one after another, but when the next mos tube is turned on, the previous mos tube will be automatically closed, and finally the fourth mos23 tube will give the first segment of the LED lamp 16 and the second segment of the LED lamp 17
  • the third segment of the LED lamp 18 and the fourth segment of the LED lamp 19 are powered.
  • the first segment of the LED lamp 16 the second segment of the LED lamp 17 is the main zone
  • the third segment of the LED lamp 18 is the sub-zone
  • the fourth segment of the LED lamp 19 is the auxiliary zone, so the first segment of the LED lamp 16.
  • the second section of the LED lamp 17 main area of the main area of the light contributes the most to the light, and the fourth stage of the fourth stage of the LED light 19 contributes to reducing the power consumption.
  • U represents the effective value of the voltage
  • V represents the standard working value of the voltage, and then analyzes the useful value of each segment of the waveform change and the amount of useless work, and determines the reasonable distribution of the four segments.
  • the first constant current driving module 12 When the voltage waveform is from A to B, at B In order to maintain the constant current of the A region before the LED is turned on, the first constant current driving module 12 must bear the voltage drop of the region A to B, the current value is 20MA, the b region has power consumption, a is no light, no In the power consumption area, the same reason c and d are the invalid power consumption areas of the constant current driving module. Therefore, the principle of reasonable partitioning is to maximize the underlying area, because the effective power of this area is the largest, because the voltage drop of the MOS tube is very low, the power consumption is very small, and the A area has no power consumption due to only voltage and no current, a It is an area that does not consume work.
  • b, c, d, e are the four working areas that do not produce light effect (ie, useless work area), b area exists in the B area before the luminescence in the B area, and the c area exists in the B area after the luminescence.
  • the d zone exists in the D zone before the G zone emits light
  • the e zone exists in the D zone after the illumination, to the maximum value of the sine wave.
  • the four zones are rotated from b to c to d to e, only from one zone.
  • the states of the four illuminating zones A, B, C, and D are A ⁇ A+B ⁇ A+ B+C ⁇ A+B+C+D, that is, the first segment of the LED lamp 16 in the A zone emits light, and the first segment of the LED lamp 16 and the second segment of the LED lamp 17 in the B zone emit light, and the first segment of the LED in the C zone
  • the lamp 16, the second segment of the LED lamp 17 and the third segment of the LED lamp 18 emit light, and the first segment of the LED lamp 16, the second segment of the LED lamp 17, the third segment of the LED lamp 18 and the third LED lamp 19 of the D region emit light.
  • the present invention is that the more the partitions, the higher the efficiency of the power supply.
  • the drive device has no capacitive and inductive components, as long as the wiring is reasonable, less distributed capacitance or inductance. Even if there is voltage and current in the a zone, it will not cause phase shifting, and the power factor is 1.0, which improves the power supply efficiency of the power plant.
  • the number of LED lamps in the front stage is greater than or equal to the number of LED lamps in the rear stage.
  • the conduction voltage of the n-segment LED efficiency is different in each area.
  • the area with more work should be equipped with more LED lights.
  • n is 4, and the number of each LED light is as shown in Figure 6:
  • the first segment of the LED lamp 16 is 51 series of strings
  • the second segment of the LED lamp 17 is 20 series of strings
  • the third segment of the LED lamp 18 is 12 series of strings
  • the fourth segment of the LED is 19 a string of lights in series
  • the LED lamp is packaged directly on a 5.0cm diameter circuit board.
  • the invention is not limited to the number of LED lamps in the above sections, and the user can determine the number of LED lamps in each segment according to the power of the conduction zone and the distribution of the light source. If the number of LED lamps in each segment is changed, as long as it can be guaranteed.
  • the number of LED lamps in the preceding paragraph is greater than or equal to the number of LED lamps in the rear segment, and it is also understood that the simple deformation or transformation of the present invention falls within the scope of protection of the present invention.
  • the invention has the advantages that the LED lamp is divided into a plurality of segments, and when the voltage rises to a turn-on voltage required for a certain segment of the LED lamp, the signal control module 11 outputs a signal to the constant current driving module of the segment, and the constant current driving of the segment
  • the module conducts the mos tube connected in series with it, at the same time, the previous mos tube stops working, and the constant current driving module of the segment supplies power to the LED lamp of the first segment to the segment through the mos tube, the first segment to the segment
  • the LED light is turned on, effectively increasing the work efficiency of the LED light source during the same working time.
  • the invention divides the LED light source into multiple sections according to the power of the conduction zone and the need of taking into account the distribution of the LED light source, and the work process is automated, no manual control is needed, and the effect of the higher the segmentation efficiency is realized, and the guide is realized. Maximize the pass area, minimize the effect of no light consumption area, improve work efficiency, and extend the service life of LED lights.
  • the shaded area represents the conduction area
  • the blank area in the sinusoidal waveform is the reactive power consumption area.

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Abstract

本发明公开了一种交流高压多段分区驱动光源装置及其方法，该装置包括电源、信号控制模块、n段恒流驱动模块、n个mos管和n段LED灯，其中n为等于或大于2的自然数；信号控制模块上设有一个输入端和n个输出端，电源分别与信号控制模块的输入端和n段LED灯电连接，各段恒流驱动模块与各个mos管一一对应串联，第一段至第m段的LED灯串联后与第m个mos管电连接，其中m为小于或等于n的自然数。本发明根据导通区的功率及兼顾LED光源分布的需要，将LED光源分成多段工作，有效实现了分段越多光效越高的效果，且实现了导通区最大化，无光耗区最小化的效果，提高了电源效率，延长了LED灯的使用寿命，提高了电厂的供电效率。

Description

交流高压多段分区驱动光源装置及其方法 技术领域
本发明涉及照明领域，尤其涉及一种交流高压多段分区驱动光源装置及其方法。
背景技术
LED光源在照明产业中得到广泛的应用，尤其是在液晶显示器的背光、街道照明和家用电器。在现有技术驱动装置中，电源产生的交流输入电压和交流输入电流，通常光源需要在恒流区，如图7所示，在图中的阴影区域中，光源才能正常的工作，而电源从通电到恒流区这段时间内，光源是无法进行工作的，因此这段时间所造成的就是无用功。另外，电压与时间的工作关系成正弦波形，该正弦波形中的方波区为导通区，即为LED光源做功区（也是上述说的恒流区）。为了保证LED灯最终输出的亮度达到用户的需求，这些光源的功率均比较大，而LED灯的工作电流一般在20mA左右。
为了保证LED灯能正常工作，目前经常使用到的方式有两种，第一种方式如图8所示，增大该LED光源的占空比，虽然这种形式达到了电路开通时间长，整机性能有所提高，但是无功功耗区很大，因此造成光源的功率很小；第二种方式如图9所示，缩小占空比，虽然减少了无功功耗区，但是LED光源工作时间极其短，也无法得到有益效果。
通过上述描述，现有的光源驱动装置已无法满足市场的需求。
 技术问题
针对上述技术中存在的不足之处，本发明提供一种结构简单、功率大及工作效率高的交流高压多段分区驱动光源装置及其方法，有效达到导通区最大化且无功耗区最小化的效果。
技术解决方案
为实现上述目的，本发明提供一种交流高压多段分区驱动光源装置，包括电源、信号控制模块、n段恒流驱动模块、n个mos管和n段LED灯，其中n为等于或大于2的自然数；所述信号控制模块上设有一个输入端和n个输出端，所述电源分别与信号控制模块的输入端和n段LED灯电连接，所述各段恒流驱动模块与各个mos管一一对应串联，所述第一段至第m段的 LED灯串联后与第m个mos管电连接，其中m为小于或等于n的自然数。
其中，所述信号控制模块上设有用于检测导通电压的电压检测单元。
其中，所述电源上设有用于接收交流电压并将交流电压提供至各段LED灯上的桥式整流器。
其中，所述各段上的LED灯与LED灯之间均串联。
为实现上述目的，本发明还提供一种交流高压多段分区驱动光源方法，包括以下步骤：
A、将LED灯分成n段分先后导通工作，且确定各段LED灯所需的导通电压，其中n为等于或大于2的自然数；
B、当电压上升到第m段LED灯的导通电压时，信号控制模块检测到该导通电压后，将信号传输给第m段恒流驱动模块，第m段恒流驱动模块导通与其串联的第m个mos管，所述第m-1个mos管关闭；其中m为小于或等于n的自然数；
C、第一段至第m段LED灯串联后通过第m个mos管导通后通电工作。
其中，所述在B步骤中，所述信号控制模块上的电压检测单元分别检测各段LED灯的导通电压。
其中，所述完成A步骤之前还包括一个步骤，所述D步骤为：电源上的交流电压通过桥式整流器的转换后，再分压给各段的LED灯。
其中，所述LED灯包括第一段LED灯、第二段LED灯、第三段LED灯和第四段LED灯；工作步骤如下：
A1、当电压上升到第一段LED灯的导通电压时，所述信号控制模块检测到该导通电压后，将信号传输给第一段恒流驱动模块，所述第一段恒流驱动模块导通与其串联的第一个mos管，所述第一段LED灯通过与第一个mos管的导通通电工作；
B1、当电压上升到第二段LED灯的导通电压时，所述信号控制模块检测到该导通电压后，将信号传输给第二段恒流驱动模块，所述第二段恒流驱动模块导通与其串联的第二个mos管，所述第一个mos管关闭，所述串联的第一段LED灯和第二段LED灯均通过第二个mos管导通通电工作；
C1、当电压上升到第三段LED灯的导通电压时，所述信号控制模块检测到该导通电压后，将信号传输给第三段恒流驱动模块，所述第三段恒流驱动模块导通与其串联的第三个mos管，所述第二个mos管关闭，所述串联的第一段LED灯、第二段LED灯和第三段LED灯均通过第三个mos管导通通电工作；
D1、当电压上升到第四段LED灯的导通电压时，所述信号控制模块检测到该导通电压后，将信号传输给第四段恒流驱动模块，所述第四段恒流驱动模块导通与其串联的第四个mos管，所述第三个mos管关闭，所述串联的第一段LED灯、第二段LED灯、第三段LED灯和第四段LED灯均通过第四个mos管导通通电工作。
 有益效果
本发明的有益效果是：与现有技术相比，本发明提供的交流高压多段分区驱动光源装置及其方法，将LED灯分成多段，当电压上升到某段LED灯所需的导通电压时，信号控制模块就输出信号给该段的恒流驱动模块，该段的恒流驱动模块导通与其串联的mos管，与此同时，前个mos管停止工作，该段的恒流驱动模块通过mos管即供电给第一段至该段的LED灯，第一段至该段的LED灯导通工作，在相同的工作时间内，有效在增大了LED光源的做功效率。本发明根据导通区的功率及兼顾LED光源分布的需要，将LED光源分成多段工作，且工作过程自动化，无需人工控制，有效实现了分段越多光效越高的效果，且实现了导通区最大化，无光耗区最小化的效果，提高了电源效率，延长了LED灯的使用寿命，提高了电厂的供电效率。
 附图说明
图1为本发明的交流高压多段分区驱动光源装置及其方法的结构示意图；
图2为本发明中n=4时的结构示意图；
图3为本实用新型中n=4时导通电压与时间的关系图；
图4为本发明中n=4时0°上升到90°时的工作状态原理图；
图5为本发明中n=4时的局部示意图；
图6为本发明中n=4时的四段LED灯的示意图；
图7为电流与电压的关系图；
图8为现有技术中第一种电压与时间的关系图；
图9为现有技术中第二种电压与时间的关系图。
主要元件符号说明如下：
10、电源 11、信号控制模块
12、第一段恒流驱动模块 13、第二段恒流驱动模块
14、第三段恒流驱动模块 15、第四段恒流驱动模块
16、第一段LED灯 17、第二段LED灯
18、第三段LED灯 19、第四段LED灯
20、第一个mos管 21、第二个mos管
22、第三个mos管 23、第四个mos管
 本发明的实施方式
为了更清楚地表述本发明，下面结合附图对本发明作进一步地描述。
请参阅图1，本发明的交流高压多段分区驱动光源装置，包括电源10、信号控制模块11、n段恒流驱动模块、n个mos管和n段LED灯，其中n为等于或大于2的自然数；信号控制模块11上设有一个输入端和n个输出端，电源10分别与信号控制模块11的输入端和n段LED灯电连接，各段恒流驱动模块与各个mos管一一对应串联，第一段至第m段的 LED灯串联后与第m个mos管电连接，其中m为小于或等于n的自然数。上述n个mos管的逻辑工作关系如下：1）先触发先导通；2）后触发后导通，导通前前个的mos管自动关闭；3）只允许一段导通。
各段LED灯的导通特性需要电源10在稳定电压的条件下，提供了一个恒定的电流，所以在这里导通的波形是一个方波，即使各段导通电压相等，各段的LED灯的数量相同，各段电流是一层一层叠加的方波，导通的占空比底层最大，顶层最小。由于各段导通时间（占空比）长短不同，因此各段LED灯各自做功量也是不同的。
在本实施例中，信号控制模块11上设有用于检测导通电压的电压检测单元（图未示）。且电源10上设有用于接收交流电压并将交流电压提供至各段LED灯上的桥式整流器（图未示），电源10中的交流高压通过桥式整流器（图未示）处理后，提供给各段LED灯使用。
在本实施例中，各段上的LED灯与LED灯之间均串联。
本发明的交流高压多段分区驱动光源方法，包括以下步骤：
第一步：将LED灯分成n段分先后导通工作，且确定各段LED灯所需的导通电压，其中n为等于或大于2的自然数；
第二步：当电压上升到第m段LED灯的导通电压时，信号控制模块11检测到该导通电压后，将信号传输给第m段恒流驱动模块，第m段恒流驱动模块导通与其串联的第m个mos管，第m-1个mos管关闭；其中m为小于或等于n的自然数；
第三步：第一段至第m段LED灯串联后通过第m个mos管导通后通电工作。
在本发明中，在第一步中，信号控制模块11上的电压检测单元（图未示）分别检测各段LED灯的导通电压。
在本发明中，完成第一步之前还包括一个步骤，该步骤为：电源10上的交流电压通过桥式整流器（图未示）的转换后，再分压给各段的LED灯。
为了更好的说明本发明，下面重点举出一个n=4的具体实施例进行说明
请进一步参与图2-6，LED灯包括第一段LED灯16、第二段LED灯17、第三段LED灯18和第四段LED灯19；工作步骤如下：
第一步骤：当电压上升到第一段LED灯16的导通电压时，信号控制模块11检测到该导通电压后，将信号传输给第一段恒流驱动模块12，第一段恒流驱动模块12导通与其串联的第一个mos管20，第一段LED灯16通过与第一个mos管20的导通通电工作；
第二步骤：当电压上升到第二段LED灯17的导通电压时，信号控制模块检测11到该导通电压后，将信号传输给第二段恒流驱动模块13，第二段恒流驱动模块13导通与其串联的第二个mos管21，第一个mos管20关闭，串联的第一段LED灯16和第二段LED灯17均通过第二个mos管21导通通电工作；
第三步骤：当电压上升到第三段LED灯18的导通电压时，信号控制模块11检测到该导通电压后，将信号传输给第三段恒流驱动模块14，第三段恒流驱动模块14导通与其串联的第三个mos管22，第二个mos管21关闭，串联的第一段LED灯16、第二段LED灯17和第三段LED灯18均通过第三个mos管22导通通电工作；
第四步骤：当电压上升到第四段LED灯19的导通电压时，信号控制模块11检测到该导通电压后，将信号传输给第四段恒流驱动模块15，第四段恒流驱动模块15导通与其串联的第四个mos管23，第三个mos管22关闭，串联的第一段LED灯16、第二段LED灯17、第三段LED灯18和第四段LED灯19均通过第四个mos管23导通通电工作。
现主要对四段LED灯的工作进行分析：当电压上升到Vf1时，由信号控制模块11的输出端输出信号到第一恒流驱动模块12，第一恒流驱动模块12开始工作，进而导通与其串联的第一个mos管20，第一段LED灯16导通，同理，当电压达到vf2、vf3、vf4时，信号控制模块11会自动检测导通电压，且第一、二、三、四个mos管会相继导通，但后一个mos管导通时，前一个的mos管会自动关闭，最后由第四个mos23管给第一段LED灯16、第二段LED灯17、第三段LED灯18和第四段LED灯19供电。在四段四区中，第一段LED灯16、第二段LED灯17是主区，第三段LED灯18是次区，第四段LED灯19是辅区，因此第一段LED灯16、第二段LED灯17主区发光主区对发光贡献最大，第四段LED灯19区贡献最少是为了减少无光功耗。请进一步参阅4，图4中U表示电压的有效值，V表示电压的标准工作值，再分析波形变化各段有用功及无用功的数量值，并以此来决定四段的合理分配。
1)电压波形从O至A时，A区导通，a区是无功耗的，发光时导通角最大占空比最大，高发率最高，做功了也最大。
2)电压波形从A到B时，在B LED尚未导通前为保持A区的恒流，第一恒流驱动模块12必须承担A到B此区的压降，电流数值为20MA，b区是有功耗、a是无发光的、无功耗区，同理c、d均为恒流驱动模块的无效功耗区。因此合理分区的原则是应底层区最大化，因为此区发光有效功率最大，由于MOS管导通压降很低，故功耗甚微，A区由于仅有电压无电流而无功耗，a是不耗功的区。该图中b、c、d、e这四个不产生光效的工作区（即无用功区），b区存在于A区发光后B区发光前，c区存在于B区发光后C区发光前，d区存在于C区发光后D区发光前，e区存在于D区发光后，到正弦波最大值，此四区由b到c到d到e呈轮转状态，只从一区转到上一区，一个时间点只存在b、c、d、e中的一个区，而与之不同的是A、B、C、D四发光区发光的状态是A→A+B→A+B+C→A+B+C+D，即为A区中第一段LED灯16发光，B区中第一段LED灯16和第二段LED灯17发光，C区中第一段LED灯16、第二段LED灯17和第三段LED灯18发光，D区中第一段LED灯16、第二段LED灯17、第三段LED灯18和第三LED灯19发光。
四区LED数量分配选定:
A区:51个LED灯，单个VF=3.1V，51×3.1V=158V，有效值是112V；
B区:20个LED灯，单个VF=3.1V，20×3.1V=62V，有效值是44V；
C区:12个LED灯，单个VF=3.1V，12×3.1V=37V，有效值是26V；
D区:8个LED灯，单个VF=3.1V，8×3.1V=25V，有效值是18V。
上述四区功率计算：电压将瞬间峰值换算成有效值，电流为有效，因此：
A区：158V÷1.4142×0.02A=2.236W；B区：62V÷1.4142×0.02A=0.877W；
C区：37.2V÷1.4142×0.02A=0.526W；D区：24.8V÷1.4142×0.02A=0.351W；四区总功率为3.99W约等于4W；输入总功率为220V×0.02A=4.4W；电源效率为4W/4.4W×100%=90.9%；上述的数值1.4142为功率因数的倒数。
通过上述的计算可以知道本发明提供的方法，LED光源的电源效率=各区总总功率/输入总功率；而输入总功率是固定的，各区总功率为各区有效功率的总和，而各区有效功率=电压*电流*功率因数。本发明即是如果分区越多，电源的效率就越高。本驱动装置无容性及感性元件，只要在布线合理，较少分布电容或电感。即使在a区有电压无电流状态也不会造成移相，功率因素为1.0，提高了电厂的供电效率。
本发明中，前段的LED灯的数量大于或等于后段的LED灯的数量。每区内LED效率n段导通电压是不同的，做功多的区应配置较多的LED灯数，如上述具体实施例中n为4中，每段LED灯的数量如图6所示：第一段LED灯16为51个串联的灯串，第二段LED灯17为20个串联的灯串，第三段LED灯18为12个串联的灯串，第四段LED灯19为8个串联的灯串， LED灯是直接封装在一块5.0cm直径的线路板上。本发明并不局限于上述各段LED灯的数量，使用者可以根据导通区的功率及兼顾光源分布来确定各段LED灯的数量，如果对各段LED灯的数量的改变，只要能保证前段的LED灯的数量大于或等于后段LED灯的数量，那么也可以理解为对本发明的简单变形或者变换，落入本发明的保护范围。
本发明的优势在于：将LED灯分成多段，当电压上升到某段LED灯所需的导通电压时，信号控制模块11就输出信号给该段的恒流驱动模块，该段的恒流驱动模块导通与其串联的mos管，与此同时，前个mos管停止工作，该段的恒流驱动模块通过mos管即供电给第一段至该段的LED灯，第一段至该段的LED灯导通工作，在相同的工作时间内，有效在增大了LED光源的做功效率。本发明根据导通区的功率及兼顾LED光源分布的需要，将LED光源分成多段工作，且工作过程自动化，无需人工控制，有效实现了分段越多光效越高的效果，且实现了导通区最大化，无光耗区最小化的效果，提高了工作效率，延长了LED灯的使用寿命。
在图3、8和9中，阴影区表示导通区，该正弦波形中空白区为无功功耗区。通过对三个图进行对比，可以知道图3中的导通区总和最大，无功功耗区总和最小，因此三种方式中，图3最适合，通过上述一个实施例的计算可以得出LED光源分段分区越多，得到的电源效率越高，提高了电源的使用效率。
以上公开的仅为本发明的几个具体实施例，但是本发明并非局限于此，任何本领域的技术人员能思之的变化都应落入本发明的保护范围。

Claims (8)

  1. 一种交流高压多段分区驱动光源装置，其特征在于，包括电源、信号控制模块、n段恒流驱动模块、n个mos管和n段LED灯，其中n为等于或大于2的自然数；所述信号控制模块上设有一个输入端和n个输出端，所述电源分别与信号控制模块的输入端和n段LED灯电连接，所述各段恒流驱动模块与各个mos管一一对应串联，所述第一段至第m段的 LED灯串联后与第m个mos管电连接，其中m为小于或等于n的自然数。
  2. 根据权利要求1所述的交流高压多段分区驱动光源装置，其特征在于，所述信号控制模块上设有用于检测导通电压的电压检测单元。
  3. 根据权利要求1所述的交流高压多段分区驱动光源装置，其特征在于，所述电源上设有用于接收交流电压并将交流电压提供至各段LED灯上的桥式整流器。
  4. 根据权利要求1或3所述的交流高压多段分区驱动光源装置，其特征在于，所述各段上的LED灯与LED灯之间均串联。
  5. 一种交流高压多段分区驱动光源方法，其特征在于，包括以下步骤：
    A、将LED灯分成n段分先后导通工作，且确定各段LED灯所需的导通电压，其中n为等于或大于2的自然数；
    B、当电压上升到第m段LED灯的导通电压时，信号控制模块检测到该导通电压后，将信号传输给第m段恒流驱动模块，第m段恒流驱动模块导通与其串联的第m个mos管，所述第m-1个mos管关闭；其中m为小于或等于n的自然数；
    C、第一段至第m段LED灯串联后通过第m个mos管导通后通电工作。
  6. 根据权利要求5所述的交流高压多段分区驱动光源方法，其特征在于，所述在B步骤中，所述信号控制模块上的电压检测单元分别检测各段LED灯的导通电压。
  7. 根据权利要求5所述的交流高压多段分区驱动光源方法，其特征在于，所述完成A步骤之前还包括一个步骤，所述D步骤为：电源上的交流电压通过桥式整流器的转换后，再分压给各段的LED灯。
  8. 根据权利要求5所述的交流高压多段分区驱动光源方法，其特征在于，所述LED灯包括第一段LED灯、第二段LED灯、第三段LED灯和第四段LED灯；工作步骤如下：
    A1、当电压上升到第一段LED灯的导通电压时，所述信号控制模块检测到该导通电压后，将信号传输给第一段恒流驱动模块，所述第一段恒流驱动模块导通与其串联的第一个mos管，所述第一段LED灯通过与第一个mos管的导通通电工作；
    B1、当电压上升到第二段LED灯的导通电压时，所述信号控制模块检测到该导通电压后，将信号传输给第二段恒流驱动模块，所述第二段恒流驱动模块导通与其串联的第二个mos管，所述第一个mos管关闭，所述串联的第一段LED灯和第二段LED灯均通过第二个mos管导通通电工作；
    C1、当电压上升到第三段LED灯的导通电压时，所述信号控制模块检测到该导通电压后，将信号传输给第三段恒流驱动模块，所述第三段恒流驱动模块导通与其串联的第三个mos管，所述第二个mos管关闭，所述串联的第一段LED灯、第二段LED灯和第三段LED灯均通过第三个mos管导通通电工作；
    D1、当电压上升到第四段LED灯的导通电压时，所述信号控制模块检测到该导通电压后，将信号传输给第四段恒流驱动模块，所述第四段恒流驱动模块导通与其串联的第四个mos管，所述第三个mos管关闭，所述串联的第一段LED灯、第二段LED灯、第三段LED灯和第四段LED灯均通过第四个mos管导通通电工作。
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