WO2014117294A1 - 具有定电流装置的并联发光二极管灯具 - Google Patents

具有定电流装置的并联发光二极管灯具 Download PDF

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Publication number
WO2014117294A1
WO2014117294A1 PCT/CN2013/000103 CN2013000103W WO2014117294A1 WO 2014117294 A1 WO2014117294 A1 WO 2014117294A1 CN 2013000103 W CN2013000103 W CN 2013000103W WO 2014117294 A1 WO2014117294 A1 WO 2014117294A1
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Prior art keywords
current
parallel
led
constant current
emitting diode
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PCT/CN2013/000103
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English (en)
French (fr)
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张希
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视网科技股份有限公司
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Priority to PCT/CN2013/000103 priority Critical patent/WO2014117294A1/zh
Publication of WO2014117294A1 publication Critical patent/WO2014117294A1/zh

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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

Definitions

  • the invention relates to a parallel LED lamp for a constant current device, in particular to a parallel lamp using LED illumination. Background technique
  • LED luminaires have been recognized by consumers and replaced with traditional luminaires, but the speed of replacing traditional luminaires is not ideal. The main reason is the high unit cost of the LED luminaire and the uncertainty of the expected service life, making it less acceptable for general applications.
  • the performance of an array of LEDs is different from that of a single LED. If the lumen maintenance information of LEDs is used to predict the lifetime of LEDs, it will lead to unpredictable risk of shopping malls and seriously distort the user's expectations. And will reduce the user's acceptance of LED luminaires.
  • the factors affecting the lumen maintenance of LED lamps include AC/DC converter power supply, lamp material, lamp structure and lamp mask quality. The quality of the lamp material, lamp structure and lamp mask can be solved.
  • An AC-DC conversion power supply with an LED luminaire is almost the standard model commonly recognized by every LED luminaire manufacturer.
  • the cost of an AC-DC conversion power supply is proportional to its mass. If each LED fixture is equipped with a high-quality, high-power and high-efficiency AC/DC converter power supply, the overall cost reduction of the overall LED fixture is very limited. However, the failure of the AC/DC conversion power supply immediately stops the illumination of the LED luminaires that it cooperates with, thus highlighting the contradiction between the cost and quality of the AC/DC conversion power supply.
  • the LED can also experience catastrophic failure. Light-emitting failure of LEDs can cause hair Photodiode lamps are all kept bright but the illumination is reduced. The catastrophic failure of the LEDs immediately causes partial or complete failure of the LED lamps. Local faults usually cause the LED lamps to fail to emit light, such as dark pixels. The point is obvious, even if the illumination of the LED luminaire still meets the original specifications, the LED luminaire will be regarded as a malfunction. Although the possibility of catastrophic failure of the LED itself is extremely low, other leading factors that affect the lumen maintenance of LED luminaires can lead to a significant increase in the catastrophic failure rate of LEDs. Therefore, the catastrophic failure rate of LEDs will lead to failure rates of LED luminaires, resulting in lost productivity and increased maintenance costs.
  • the LED string When the resistance value of the current limiting resistor is too low, the LED string will generate illumination higher than normal illumination due to excessive load. When the resistance value of the current limiting resistor is too high, illumination below normal illumination will be generated.
  • the current-limiting resistor with low resistance value also causes the current overload of the LED string to reduce the life of the LED. If the current-limiting resistor value is too low or too high, the illumination of the LED lamp will be uneven. However, uniform illumination is a basic requirement of any luminaire, so it is not accurate or reliable to use current limiting resistors as current limiting devices.
  • An object of the present invention is to provide a parallel light-emitting diode lamp having a constant current device in parallel with a parallel current input and output device and one or more constant current light-emitting diode strings in order to solve the above problems.
  • the invention provides a parallel LED lamp with a constant current device, comprising: a parallel current input and output device, wherein a current path of a constant current parallel LED lamp transmits a direct current through the current input device to enter one or more a constant current LED string, and simultaneously enters its current output device, and is transmitted to the current input device of the next parallel connected constant current parallel LED lamp; a constant current LED string, which is composed of a constant current device and an LED lamp
  • the string is composed of a series of LEDs, which are composed of one or more LED light source groups connected in series; an LED light source group, which is composed of a plurality of light emitting diodes and a current bypass device in parallel;
  • the device is a current bypass of the LED light source group, so that the DC current passes through the fault LED light source group, and the LED string still operates continuously under the condition that the overall illumination is reduced;
  • the constant current device includes a current regulating device , an external current limiting resistor And a reverse current diode; a current regulating
  • each of the normal light emitting diodes of the LED light source group continues to emit light even when one or more of the light emitting diodes of the light emitting diode source group fails.
  • the current bypass device is a current bypass of the LED light source group, so that the direct current Through the faulty LED source group, the LED string remains operational with reduced overall illumination.
  • the constant current device can be connected to one or several LED strings.
  • the normal constant current LED string connected in parallel is capable of sustaining illumination even when one or more of the concatenated one or several constant current LED strings fail.
  • the faulty constant current LED string can be directly swapped without having to replace the entire constant current parallel LED luminaire.
  • the normal constant current parallel LED lamps connected in parallel are continuously illuminated even when one or several constant current parallel LED lamps connected in parallel fail.
  • the faulty constant current parallel LED luminaire can be plugged and replaced at any time without affecting the illumination of the remaining constant current parallel LED luminaires connected in parallel.
  • all of the constant current parallel LED lamps that are connected in parallel are shared by the same external DC power source.
  • all of the constant current parallel LED lamps connected in parallel share the DC current of the same external AC/DC conversion power supply, and the external AC/DC conversion power supply is connected to the main AC power.
  • the constant current parallel LED lamps connected in parallel share the same DC power source, wherein the DC power source comprises: a solar cell, a fuel cell, a chemical energy battery, and a DC battery storage tank.
  • the DC power source comprises: a solar cell, a fuel cell, a chemical energy battery, and a DC battery storage tank.
  • the plurality of constant current parallel LED lamps are connected in parallel to an external DC power source, and then connected to the external DC power source and the AC power source in parallel by a conventional wall switch, and simultaneously open or close the parallel connection. Illumination of all constant current parallel LED luminaires.
  • the plurality of constant current parallel LED lamps are connected in parallel to an external DC power source, and then one or more wall dimming switches and a dimming controller are connected, thereby controlling all the constant current parallel lighting of the parallel connection.
  • the brightness of the diode luminaire illumination is not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to the constant current parallel LED lamps.
  • a parallel current input and output device is composed of a current input device and a current output device connected in parallel, and an external DC power supply provides a direct current to one or more constant current parallel LED lamps connected in parallel.
  • DC current from an external DC power supply, connected in parallel
  • the current input device of the first constant current parallel LED lamp enters one or more constant current LED strings, enters its current output device, and then transmits to the current input device of the next constant current parallel LED lamp Thereby, a DC current distribution is transmitted to each of the constant current parallel LED lamps on the parallel connection.
  • a constant current LED string consisting of an LED string and a constant current device connected in series, an LED string consisting of one or more LED source groups connected in series, an LED source group,
  • the utility model is composed of a plurality of light-emitting diodes and a current bypass device connected in parallel.
  • the current bypass device provides a current bypass, so that the normal-emitting diode light in the light-emitting diode light string
  • the source group continues to operate under reduced illumination conditions.
  • a certain current device limits the current through the LED string to a fixed current amount or less than the fixed current amount. Therefore, each constant current LED string of the same specification will Consumes equal current.
  • a constant current parallel LED lamp is composed of one or more constant current LED strings connected in parallel; a constant current parallel LED lamp composed of different numbers of constant current LED strings has the same behavior mode under normal operation. . Therefore, the constant current parallel LED lamps of different powers are connected in parallel to the same external DC power supply, and the same behavior mode will be used under normal operation. If the power of the external DC power supply is less than the total power of all the parallel current LED lamps connected in parallel, the constant current parallel LED lamps of different powers will consume the same proportion of current, that is, the current consumption of the parallel LED lamps The electrical current is equal to its power multiplied by the power of the DC power supply, divided by the total power of the parallel connected LED lamps of all constant currents.
  • the constant current LED lamp string connected in parallel is provided with an individual constant current device and can operate independently, and is used as a current stabilizing mechanism of the LED lamp, which is superior to the current limiting mechanism of the current limiting resistor of the old LED lamp.
  • a plurality of constant current parallel LED lamps connected in parallel are connected to the same external DC power source, share the power provided by the power source, and share the cost of the power source, thereby solving the cost of the power supply of the AC/DC conversion. The contradiction of quality trade-offs.
  • the illumination capability of the normal LEDs connected in parallel is not affected, even if one or several LEDs of the LED source group fail, the LED source group
  • Each of the normal light-emitting diodes continues to emit light.
  • Configure a larger number Low-power LEDs replace a small number of high-power LEDs to form an LED string with the same total power. Not only does the divergence of the LEDs have a lower heat, but also because of the large number of LEDs. The dark spots produced by LEDs are also less noticeable.
  • the application of the embodiment can eliminate the maintenance and interference of the LED luminaire.
  • the current bypass device is connected in parallel in parallel to provide current bypass, so that the normal LED light source group of the LED string is reduced in overall illumination. Under the conditions, continue to operate.
  • the old LED lamp requires a separate AC/DC conversion power supply, and the plurality of constant current parallel LED lamps of the present invention can be connected in parallel and share the same external DC power.
  • the AC power source transmits AC current to an AC/DC conversion power supply, and then supplies DC current to LED luminaires.
  • Conventional LED luminaire systems require a large number of AC/DC conversion power supplies to allow AC current throughout the entire LED luminaire system.
  • the constant current parallel LED luminaire system uses a shared external DC power supply to allow DC current throughout the entire LED luminaire system. Compared to DC power, it is safer than AC power, especially in outdoor environments. This allows maintenance personnel to quickly and safely replace or install LED luminaires without having to turn off the area's main power supply and interfering with users in the area.
  • a plurality of constant current parallel LED lamps are connected in parallel to share the same external DC power supply, effectively collecting a plurality of AC/DC conversions or eliminating a plurality of unstable AC/DC conversions.
  • Figure 1 is a schematic block diagram of an LED lamp having a constant current device in accordance with an embodiment of the present invention.
  • FIG. 2 is a block diagram of the LED lamp of FIG. 1 having a constant current device.
  • Figure 3 is a circuit diagram of the LED lamp of Figure 2 with a constant current device.
  • Figure 4 is a circuit diagram of the constant current LED string of Figure 3.
  • Figure 5 is a circuit diagram of the constant current device of Figure 4.
  • LED luminaire with constant current device - 1 , parallel current input and output device - 2, current input device - 21, current output device - 22, forward current -23, current limit -24, constant current LED string -3 , LED string-4, LED source group-41, LED-42, current bypass device-43, constant current device-5, resistor-51, reverse current diode-52, current regulator -6 . detailed description
  • the embodiment provides a constant current parallel LED lamp 1 with a constant current device, as shown in FIG. 1 , comprising a parallel current input and output device 2 and one or more constant current LED strings 3, which are connected in parallel to form a fixed Current parallel LED luminaire 1 .
  • the parallel current input/output device 2 is composed of a current input device 21 and a current output device 22 in parallel.
  • the DC current 23 enters its constant current LED string 3 from an external DC power source via a current input device 21 of the LEDs 1 in parallel with the first constant current connected in parallel, and simultaneously enters its current output device 22 , to the current input device 21 of the next constant current parallel LED lamp 1 in parallel.
  • the constant current LED string 3 is composed of a constant current device 5 and an LED string 4, as shown in Fig. 2 and Fig. 3.
  • the constant current device 5 limits the current 24 through the LED string 4 and is maintained at or below a fixed current amount.
  • a plurality of LEDs 42 and a current bypass device 43 are connected in parallel to form an LED lamp source group 41, and then each LED lamp source group 41 is connected in series in series to form a light-emitting diode light string 4, and electrically connecting the light-emitting diode light string 4 to the constant current device 5 to form a certain current light-emitting diode light string 3, and then combining a plurality of constant current light-emitting diode light strings 3 to form a light-emitting surface , As shown in Figure 3.
  • the input DC current 23 passes through the current input device 21, passes through the constant current device 5, and is supplied to the LED string 4 for use.
  • the constant current device 5 includes a current regulating device 6, an external current limiting resistor 51, and a reverse current diode 52.
  • the current regulating device 6 corresponds to a fixed current amount according to the resistance value of the external current limiting resistor 52. value.
  • the current regulating device 6 suppresses the current 24 from rising, and maintains the current amount at a level of the fixed current amount, thereby preventing the LED 42 of the LED string 4 from being affected by the current overload.
  • the loss, reverse current diode 52 is to prevent the current regulating device 6 from being damaged by the reverse current.
  • Constant current LED string 3 has its own constant current device 5 And independently operating, therefore, a plurality of constant current LED strings 3 connected in parallel can continue to operate with reduced overall illumination without being affected by the faulty current LED string 3.
  • a plurality of constant current parallel LED lamps 1 connected in parallel are continuously operated, and are not affected by the parallel faulty constant current parallel LED lamps 1.
  • a plurality of constant current parallel LED lamps 1 of the same or different power are connected in parallel to share the same external DC power source, and a wall switch can simultaneously turn on or off all of the parallel currents of the parallel connection through the external DC power source. Illumination of the diode luminaire 1.
  • Multiple constant current parallel LED lamps 1 are connected in parallel to share the same external DC power supply, effectively collecting multiple AC/DC conversions or eliminating multiple unstable AC/DC conversions.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

一种具有定电流装置（5）的并联发光二极管灯具（1），由并联电流输出入装置（2）及一个或多个定电流发光二极管灯串（3）并联组成。并联电流输出入装置（2）由电流输入装置（21）及电流输出装置（22）并联构成。以并联方式并接的多个定电流并联发光二极管灯具（1）连结外部直流电源后，直流电流（23）经由第一个定电流并联发光二极管灯具（1）的电流输入装置（21）进入其连接的定电流发光二极管灯串（3），并同时进入其电流输出装置（22），再传输至下一个并联的定电流并联发光二极管灯具（1）的电流输入装置（21）。定电流发光二极管灯串（3）由定电流装置（5）和发光二极管灯串（4）串联组成。发光二极管灯串（4）由一个或多个发光二极管灯源组（41）串联组成，发光二极管灯源组（41）由多个发光二极管（42）及电流旁路装置（43）并联组成，电流旁路装置（43）能令直流电流（23）通过故障发光二极管灯源组（41）。定电流装置（5）包含电流调制装置（6）、外部限流电阻（51）及反向电流二极管（52）。

Description

具有定电流装置的并联发光二极管灯具
技术领域
本发明有关于一种定电流装置的并联发光二极管灯具，尤指一种应用发光 二极管照明的并联灯具。 背景技术
发光二极管灯具已受到广大消费者认可并用其替代各式传统灯具，但是用 其替代传统灯具的速度并不理想。主要原因在于发光二极管灯具的高单价成本 及预期使用寿命的不确定性， 导致其较不容易被一般应用场所接受。
一个发光二极管数组的运作表现不同于单个发光二极管，若以发光二极管 的流明维持率信息来预测发光二极管灯具的使用寿命时间，将会导致不可预期 的商场风险， 并严重扭曲使用者的预期心理， 并会降低使用者对发光二极管灯 具的接受度。影响发光二极管灯具流明维持率的因素， 包含交直流转换电源供 应器、 灯具材质、 灯具结构及灯具光罩的品质等， 其中灯具材质、 灯具结构及 灯具光罩的质量是可以解决的。
一个交直流转换电源供应器搭配一个发光二极管灯具几乎是目前每个发 光二极管灯具厂商所共同认知的标准模式，然而交直流转换电源供应器的成本 与其质量成正比。若每个发光二极管灯具都搭配一个高质量、 高功率且高效率 的交直流转换电源供应器， 则整体发光二极管灯具的设备成本降低非常有限。 然而交直流转换电源供应器的故障会立即停止与其配合的发光二极管灯具的 照明， 因而更突显出交直流转换电源供应器的成本与质量取舍的矛盾。
全球每年生产数十亿个外部电源供应器，美国每年淘汰数亿个外部电源供 应器，但只回收其中的 13%,其余都进入了掩埋场，造成环境污染与资源浪费。 因此有效地汇集或消除多个发光二极管灯具的交直流转换电源供应成为最重 要与最迫切的课题之一 ,发光二极管灯具替代所有传统灯具已成为全球各国政 府既定的短中期目标。
发光二极管的光衰超过其预设的百分比则被认为是瑕疵， 并视为故障， 除 此之外，发光二极管也会发生灾难性故障。发光二极管的光衰性故障会导致发 光二极管灯具全部保持明亮但照度缩减，发光二极管的灾难性故障则立即造成 发光二极管灯具局部性或全部性的故障，其中局部性故障通常造成发光二极管 灯具点或区域无法发光，如无法发光的暗点明显， 则即使该发光二极管灯具的 照度仍然符合原始规格， 该发光二极管灯具也将被视为故障。 虽然发光二极管 本身发生灾难性故障的可能性极低，但其他影响发光二极管灯具流明维持率的 前列因素可导致发光二极管的灾难性故障率大幅增长。 因此，发光二极管灾难 性故障率的增长将导致发光二极管灯具的故障率，致使生产力的损失与维护成 本的增加。
当以并联方式并接组成的发光二极管灯串中的发光二极管数量增多时，各 发光二极管灯串的正向电压不尽相同，电流量亦会因正向电压不同而呈现不稳 定。然而缩小每个发光二极管灯串的电流损失并确保其稳定性所需的资源相对 繁杂，运用筒单的限流电阻加诸于每个发光二极管灯串， 藉以控制通过该发光 二极管灯串的电流量是最普遍的解决方法。虽然限流电阻的解决方法的成本较 低， 但其精准度与可靠度偏低。
大量生产时，以筒单的限流电阻加诸于每个发光二极管灯串达成相同照度 在实际操作中是不可能的实现的，因为自动生产的流程无法依据个别发光二极 管灯串的正向电压值而附加对应电阻值的限流电阻至每个发光二极管灯串，即 使可以实现， 其生产设备成本与时间将大幅增加。
限流电阻的电阻值过低时，发光二极管灯串会因过度负载而产生高于正常 照度的照明， 当限流电阻的电阻值过高时， 则会产生低于正常照度的照明。 过 低电阻值的限流电阻也会造成发光二极管灯串的电流过载而缩减发光二极管 的寿命， 限流电阻值过低或过高皆会造成发光二极管灯具照明的不均匀。 然而 均匀照明是任何灯具的基本要求， 因此以限流电阻作为限电流装置并不精确， 也不可靠。
发光二极管灯具取代传统灯具将是不可避免的，并且是世界潮流的发展方 向。发光二极管灯具的流明维持率直接影响其在商场不可预期的风险与使用者 的接受度， 发光二极管灾难性故障频率是决定发光二极管灯具效能的主要因 素， 而发光二极管流明维持率对于发光二极管灯具的效能的影响则是微乎其 微。 因此， 除去发光二极管本身流明维持率因素， 最小化传统发光二极管灯具 的各种可能的故障因素，同时解决交直流转换电源供应的成本与质量取舍的矛 盾， 即是本发明的主要重点。 发明内容
本发明的目的在于为解决上述问题提供一种具有定电流装置的并联发光 二极管灯具，其以并联方式并接一并联电流输出入装置及一个或多个定电流发 光二极管灯串。
本发明提供的具有定电流装置的并联发光二极管灯具， 其包含： 一并 联电流输出入装置， 是由定电流并联发光二极管灯具的电流路径传输直流 电流， 经由其电流输入装置， 进入一个或多个定电流发光二极管灯串， 并 同时进入其电流输出装置， 传输至下一个并联连结的定电流并联发光二极 管灯具的电流输入装置； 一定电流发光二极管灯串， 其由一定电流装置及 一发光二极管灯串串联组成； 一发光二极管灯串， 其由一个或多个发光二 极管灯源组串联组成； 一发光二极管灯源组， 其由多个发光二极管及一电 流旁路装置并联组成； 一电流旁路装置， 是发光二极管灯源组的电流旁路， 令直流电流通过故障发光二极管灯源组， 在整体照度缩减的状况下， 该发 光二极管灯串仍可持续运作； 一定电流装置包含一电流调节装置， 一外部 限流电阻， 及一反向电流二极管； 一电流调节装置根据外部限流电阻的电 阻值， 对应出固定电流量值， 并于通过发光二极管灯串的电流上升至固定 电流量值时， 即抑止电流量上升， 维持电流量保持在该固定电流量值的水 平， 避免发光二极管灯串的发光二极管因电流过载而受损； 一外部限流电 阻， 其电阻值对应一固定电流量值， 用以限制通过发光二极管灯串的电流 的电流量； 一反向电流二极管， 其提供逆电流保护， 避免电流调节装置因 反向电流而受损； 及该定电流并联发光二极管灯具的照明， 其限制通过其 发光二极管灯串的直流电流量， 经由以串联方式串接的一个或多个发光二 极管灯源组， 再输入以并联方式连结的多个发光二极管而发光。
优选地， 发光二极管灯源组的每一正常发光二极管即使在该发光二极 管灯源组的一个或数个发光二极管发生故障时， 仍可持续发光。
优选地， 电流旁路装置是发光二极管灯源组的电流旁路， 令直流电流 通过故障发光二极管灯源组， 在整体照度缩减的状况下， 发光二极管灯串 仍可持续运作。
优选地， 定电流装置可连接一个或数个发光二极管灯串。
优选地， 以并联方式并接的正常定电流发光二极管灯串， 即使在该并 联连结的一个或数个定电流发光二极管灯串发生故障时， 仍可持续发光。
优选地， 故障的定电流发光二极管灯串可直接抽换而无须替换整个定 电流并联发光二极管灯具。
优选地， 以并联方式并接的正常定电流并联发光二极管灯具即使在该 并联连结的一个或数个定电流并联发光二极管灯具发生故障时， 皆可持续 发光。
优选地， 故障的定电流并联发光二极管灯具可随时插拔替换而不影响 其余以并联方式并接的正常定电流并联发光二极管灯具的照明。
优选地， 以并联方式并接的所有定电流并联发光二极管灯具分享同一 外部直流电源。
优选地， 以并联方式并接的所有定电流并联发光二极管灯具分享同一 外部交直流转换电源供应器的直流电流， 该外部交直流转换电源供应器连 结主要交流电源。
优选地， 以并联方式并接的所有定电流并联发光二极管灯具分享同一 直流电源， 其中， 直流电源包含： 太阳能电池、 燃料电池、 化学能电池及 直流电池储存槽。
优选地， 多个定电流并联发光二极管灯具以并联方式并接一外部直流 电源， 再以一传统墙面开关以并联方式并接该外部直流电源及交流电源， 而同时开启或关闭该并联连结的所有定电流并联发光二极管灯具的照明。
优选地， 多个定电流并联发光二极管灯具以并联方式并接一外部直流 电源， 再连结一个或多个墙面调光开关及一调光控制器， 进而控制该并联 连结的所有定电流并联发光二极管灯具照明的明暗度。
一个并联电流输出入装置由一个电流输入装置及一个电流输出装置并联 组成，一个外部直流电源提供直流电流给以并联方式并接的一个或多个定电流 并联发光二极管灯具，。 直流电流， 自一外部直流电源， 经由以并联方式并接 的第一个定电流并联发光二极管灯具的电流输入装置 ,进入其一个或多个定电 流发光二极管灯串， 同时进入其电流输出装置，再传输至下一个定电流并联发 光二极管灯具的电流输入装置，藉此将直流电流分配传输至该并联连结上的每 一个定电流并联发光二极管灯具。
一个定电流发光二极管灯串，其由一个发光二极管灯串及一个定电流装置 串联组成，一个发光二极管灯串，其由一个或多个发光二极管灯源组串联组成， 一发光二极管灯源组， 其由多个发光二极管及一电流旁路装置并联组成，一发 光二极管灯源组的所有发光二极管故障时， 其电流旁路装置提供电流旁路，令 该发光二极管灯串中正常发光的二极管灯源组在照度缩减的状况下持续运作， 一定电流装置限制通过发光二极管灯串的电流，保持在一固定电流量或低于此 固定电流量，因此每一个相同规格的定电流发光二极管灯串都会消耗相等的电 流。
一个定电流并联发光二极管灯具是由一个或多个定电流发光二极管灯串 并联构成；不同数量的定电流发光二极管灯串组成的定电流并联发光二极管灯 具，在正常运转下都会有相同的行为模式。 因此不同功率的定电流并联发光二 极管灯具并联连结至同一外部直流电源， 在正常运转下都会有相同的行为模 式。如该外部直流电源的功率小于该并联连结所有定电流并联发光二极管灯具 的总功率， 不同功率的定电流并联发光二极管灯具皆会消耗相同比例的电流 量，即任一定电流并联发光二极管灯具消耗的电流量等于其功率与直流电源的 功率相乘， 再除以该并联连结所有定电流并联发光二极管灯具的总功率。
本实施例以并联方式并接的定电流发光二极管灯串，具有个别的定电流装 置且能独立运转，作为发光二极管灯具的电流稳定机制，优于旧式发光二极管 灯具限流电阻的限电流机制。本实施例以并联方式并接的多个定电流并联发光 二极管灯具连结同一外部直流电源，共同分享该电源提供的电力，且共同分担 该电源的成本， 藉以解决交直流转换的电源供应的成本与质量取舍的矛盾。
本发明的优点如下：
1.本实施例单一发光二极管故障时， 毫不影响其以并联方式并接的正常发 光二极管的发光能力，即使该发光二极管灯源组的一个或数个发光二极管发生 故障，发光二极管灯源组的每一正常发光二极管皆持续发光。 配置较多数量的 低功率发光二极管取代较少数量的高功率发光二极管，组成一个同等总功率的 发光二极管灯串， 不仅其发光二极管发散的热度较低，且因为发光二极管的数 量较多， 相较之下， 故障发光二极管产生的暗点也较不引人注目。 当发光二极 管灯串的发光二极管数量增加至一定程度时，一个或数个故障发光二极管产生 的暗点， 显现在整体发光二极管灯具照明的视觉效果上几乎无法辨别。 如此， 在发光二极管灯具照度仍符合其原始规格的情况下，本实施例的应用可免除发 光二极管灯具维修及干扰使用。
2.本实施例单一发光二极管灯源组故障时， 毫不影响其以串联方式串接的 正常发光二极管灯源组的发光能力。当一发光二极管灯源组的所有发光二极管 故障时， 则由其以并联方式并接的电流旁路装置提供电流旁路，令该发光二极 管灯串的正常发光二极管灯源组， 在整体照度缩减的状况下， 持续运作。
3.本实施例单一定电流发光二极管灯串故障时， 毫不影响其以并联方式并 接的正常定电流发光二极管灯串的发光能力。每一定电流发光二极管灯串， 皆 由自有的定电流装置保护且独立运转，故障的定电流发光二极管灯串可直接抽 换， 且无须替换整个定电流并联发光二极管灯具。
4.本实施例单一定电流并联发光二极管灯具发生故障时， 毫不影响其以并 联方式并接的定电流并联发光二极管灯具的发光能力。直流电流，从前一个并 接的正常定电流并联发光二极管灯具，流入故障定电流并联发光二极管灯具的 电流输入装置，再由其并联的电流输出装置，传输至下一个并接的正常定电流 并联发光二极管灯具。故障的定电流并联发光二极管灯具可随时插拔替换， 而 不影响其余并接的正常定电流并联发光二极管灯具的照明。
5.以并联方式并接的多个相同或不同功率定电流并联发光二极管灯具可 分享同一外部直流电源。一墙面开关可经由该外部直流电源， 同时开启或关闭 该并联连结的所有定电流并联发光二极管灯具的照明。本发明的定电流并联发 光二极管灯具的并联连结性， 不仅筒易化发光二极管灯具系统的设计， 更节省 该类发光二极管灯具系统安装与维护的时间与成本。
6.旧式发光二极管灯具需要个别的交直流转换电源供应器， 而本发明的多 个定电流并联发光二极管灯具能以并联方式并接，并共同分享同一外部直流电 源。 交流电源传输交流电流至一交直流转换电源供应器，再供给直流电流给一 发光二极管灯具。 传统的发光二极管灯具系统需大量交直流转换电源供应器， 以使交流电流遍布及整个发光二极管灯具系统，定电流并联发光二极管灯具系 统采用共享外部直流电源， 以使直流电流遍布及整个发光二极管灯具系统。相 比较下直流用电比交流用电更安全，尤其是在户外环境时。如此维护人员可迅 速且安全的替换或安装发光二极管灯具， 而无须关闭区域总电源， 干扰该区域 的用户。
7.本实施例以并联方式并接多个定电流并联发光二极管灯具， 共同分享同 一外部直流电源， 有效地汇集多个交直流转换或消除多个不稳定的交直流转 换。 附图说明
图 1 是本发明实施例具有定电流装置的发光二极管灯具的方块概要示意 图。
图 2是图 1具有定电流装置的发光二极管灯具的方块细部示意图。
图 3 是图 2具有定电流装置的发光二极管灯具的电路示意图。
图 4是图 3定电流发光二极管灯串的电路示意图。
图 5 是图 4定电流装置的电路示意图。
符号说明
具有定电流装置的发光二极管灯具 - 1 , 并联电流输出入装置 -2, 电流输 入装置 -21 , 电流输出装置 -22, 正向电流 -23 , 限电流 -24, 定电流发光二极管 灯串 -3 , 发光二极管灯串 -4, 发光二极管灯源组 -41 , 发光二极管 -42, 电流旁 路装置 -43 , 定电流装置 -5 , 电阻 -51 , 反向电流二极管 -52, 电流调节装置 -6。 具体实施方式
为使发明的上述目的、特征和优点能够更加明显易懂， 下面结合附图对本 发明的具体实施方式做详细的说明。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是本发明 还可以采用其他不同于在此描述的其它方式来实施，本领域技术人员可以在不 违背本发明内涵的情况下做类似推广，因此本发明不受下面公开的具体实施例 的限制。
本实施例提供了一种具有定电流装置的定电流并联发光二极管灯具 1 ,如 图 1所示，包含并联电流输出入装置 2及一个或多个定电流发光二极管灯串 3 , 并联组成一个定电流并联发光二极管灯具 1 。 如图 2及图 3所示， 该并联电流输出入装置 2由一电流输入装置 21及一 电流输出装置 22并联组成。 直流电流 23 自一外部直流电源， 经由以并联方式 并接的第一个定电流并联发光二极管灯具 1的电流输入装置 21 , 进入其定电 流发光二极管灯串 3 ,且同时进入其电流输出装置 22, 至并接的下一个定电流 并联发光二极管灯具 1的电流输入装置 21。
一定电流发光二极管灯串 3由一定电流装置 5及一发光二极管灯串 4串联 组成， 如图 2及图 3所示。 定电流装置 5限制通过发光二极管灯串 4的电流 24并保持在一固定电流量或低于此固定电流量。
如图 4所示， 先以并联方式并接多个发光二极管 42及一个电流旁路装置 43 , 形成一发光二极管灯源组 41后， 再以串联方式串接各发光二极管灯源组 41 , 形成一发光二极管灯串 4, 并将该发光二极管灯串 4电性串接一定电流装 置 5 , 形成一定电流发光二极管灯串 3后， 再将多个定电流发光二极管灯串 3 并联组成一发光面， 如图 3所示。 输入的直流电流 23经由电流输入装置 21 , 先经过此定电流装置 5 , 再供给发光二极管灯串 4使用。
如图 5所示， 定电流装置 5 包含一电流调节装置 6, —外部限流电阻 51 , 及一反向电流二极管 52, 电流调节装置 6依据外部限流电阻 52的电阻值， 对应固定电流量值。 当正向电流 23上升至固定电流量值时， 电流调节装置 6 即抑止电流 24上升， 维持其电流量在固定电流量值的水平， 避免发光二极管 灯串 4的发光二极管 42因电流过载而受损，反向电流二极管 52则为避免电流 调节装置 6因反向电流而受损。
即使其并联连结的一个或数个发光二极管 42发生故障， 发光二极管灯源 组 41的正常发光二极管 42仍可持续发光， 当发光二极管灯源组 41的所有发 光二极管 42故障时，则由其以并联方式并接的电流旁路装置 43提供电流旁路 , 令直流电流通过故障发光二极管灯源组 41 , 在整体照度缩减的状况下， 发 光二极管灯串 4持续运作。 定电流发光二极管灯串 3都有自主的定电流装置 5 , 且独立运转， 因此， 以并联方式并接的多个定电流发光二极管灯串 3可在整 体照度缩减的情况下持续运作， 而不受故障定电流发光二极管灯串 3的影响。 以并联方式并接的多个定电流并联发光二极管灯具 1持续运作，不受该并联的 故障定电流并联发光二极管灯具 1的影响。
多个相同或不同功率的定电流并联发光二极管灯具 1以并联方式连结，共 同分享同一外部直流电源，一墙面开关可经由该外部直流电源， 同时开启或关 闭该并联连结的所有定电流并联发光二极管灯具 1的照明。多个定电流并联发 光二极管灯具 1以并联方式连结，共同分享同一外部直流电源，有效地汇集多 个交直流转换或消除多个不稳定的交直流转换。
虽然本发明是结合以上实施例进行描述的，但本发明并不被限定于上述实 施例， 而只受所附权利要求的限定， 本领域普通技术人员能够容易地对其进行 修改和变化， 但并不离开本发明的实质构思和范围。

Claims

权利 要 求
1. 一种具有定电流装置的并联发光二极管灯具， 包含：
一并联电流输出入装置， 是由定电流并联发光二极管灯具的电流路径 传输直流电流， 经由其电流输入装置， 进入一个或多个定电流发光二极管 灯串， 并同时进入其电流输出装置， 传输至下一个并联连结的定电流并联 发光二极管灯具的电流输入装置；
一定电流发光二极管灯串， 其由一定电流装置及一发光二极管灯串串 联组成；
一发光二极管灯串， 其由一个或多个发光二极管灯源组串联组成； 一发光二极管灯源组， 其由多个发光二极管及一电流旁路装置并联组 成；
一电流旁路装置， 是发光二极管灯源组的电流旁路， 令直流电流通过 故障发光二极管灯源组， 在整体照度缩减的情况下， 该发光二极管灯串仍 可持续运作；
一定电流装置包含一电流调节装置， 一外部限流电阻， 及一反向电流 二极管；
一电流调节装置根据外部限流电阻的电阻值对应固定电流量值， 并于 通过发光二极管灯串的电流上升至固定电流量值时， 即抑止电流量上升， 维持电流量保持在该固定电流量值的水平， 避免发光二极管灯串的发光二 极管因电流过载而受损；
一外部限流电阻， 其电阻值对应一固定电流量值， 用以限制通过发光 二极管灯串的电流的电流量；
一反向电流二极管， 其提供逆电流保护， 避免电流调节装置因反向电 流而受损； 及
该定电流并联发光二极管灯具的照明， 其限制通过其发光二极管灯串 的直流电流量， 经由以串联方式串接的一个或多个发光二极管灯源组， 再 输入以并联方式连结的多个发光二极管而发光。
2. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其 特征在于， 发光二极管灯源组的每一正常发光二极管即使在该发光二极管 灯源组的一个或数个发光二极管发生故障时， 仍可持续发光。
3. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其 特征在于， 电流旁路装置是发光二极管灯源组的电流旁路， 令直流电流通 过故障发光二极管灯源组， 在整体照度缩减的情况下， 发光二极管灯串仍 可持续运作。
4. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其 特征在于， 定电流装置可连接一个或数个发光二极管灯串。
5. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其 特征在于， 以并联方式并接的正常定电流发光二极管灯串， 即使在该并联 连结的一个或数个定电流发光二极管灯串发生故障时， 仍可持续发光。
6. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其 特征在于， 故障的定电流发光二极管灯串可直接抽换而无须替换整个定电 流并联发光二极管灯具。
7. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其 特征在于， 以并联方式并接的正常定电流并联发光二极管灯具即使在该并 联连结的一个或数个定电流并联发光二极管灯具发生故障时， 都可持续发 光。
8. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其 特征在于， 故障的定电流并联发光二极管灯具可随时插拔替换而不影响其 余以并联方式并接的正常定电流并联发光二极管灯具的照明。
9. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其 特征在于， 以并联方式并接的所有定电流并联发光二极管灯具分享同一外 部直流电源。
10. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其特征在于， 以并联方式并接的所有定电流并联发光二极管灯具分享同一 外部交直流转换电源供应器的直流电流， 该外部交直流转换电源供应器连 结主要交流电源。
11. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其特征在于， 以并联方式并接的所有定电流并联发光二极管灯具分享同一 直流电源， 其中， 直流电源包含： 太阳能电池、 燃料电池、 化学能电池及 直流电池储存槽。
12. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其特征在于， 多个定电流并联发光二极管灯具以并联方式并接一外部直流 电源， 再以一传统墙面开关以并联方式并接该外部直流电源及交流电源， 而同时开启或关闭该并联连结的所有定电流并联发光二极管灯具的照明。
13. 根据权利要求 1所述的具有定电流装置的并联发光二极管灯具， 其特征在于， 多个定电流并联发光二极管灯具以并联方式并接一外部直流 电源， 再连结一个或多个墙面调光开关及一调光控制器， 进而控制该并联 连结的所有定电流并联发光二极管灯具照明的明暗度。
PCT/CN2013/000103 2013-01-31 2013-01-31 具有定电流装置的并联发光二极管灯具 WO2014117294A1 (zh)

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