WO2015149210A1 - Led灯板、led灯板之高压脉冲保护电路及led灯具 - Google Patents

Led灯板、led灯板之高压脉冲保护电路及led灯具 Download PDF

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Publication number
WO2015149210A1
WO2015149210A1 PCT/CN2014/074349 CN2014074349W WO2015149210A1 WO 2015149210 A1 WO2015149210 A1 WO 2015149210A1 CN 2014074349 W CN2014074349 W CN 2014074349W WO 2015149210 A1 WO2015149210 A1 WO 2015149210A1
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WO
WIPO (PCT)
Prior art keywords
led
circuit board
high voltage
led lamp
bypass capacitor
Prior art date
Application number
PCT/CN2014/074349
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English (en)
French (fr)
Inventor
赵文兴
Original Assignee
东莞高仪电子科技有限公司
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Priority to PCT/CN2014/074349 priority Critical patent/WO2015149210A1/zh
Publication of WO2015149210A1 publication Critical patent/WO2015149210A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0055—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by screwing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/044—Physical layout, materials not provided for elsewhere
    • 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
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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 LED lamp technology, in particular to a lightning protection LED lamp board, a high voltage pulse protection circuit of an LED lamp board and an LED lamp.
  • FIG. 1 and FIG. 2 it shows a schematic structure of a typical LED lamp of the prior art, which comprises a metal casing 1, a lampshade (not shown in the drawing), and an LED driving power source 2. , aluminum substrate 3 (or ceramic substrate), insulating layer 4 and LED chip 5; the insulating layer 4 can only withstand a voltage of 1-2KV, so that in lightning weather, the LED light is vulnerable to lightning damage; 2, the high-voltage pulse is broken by the metal casing 1 through the insulating layer 4 of the aluminum substrate 3, and then the LED is positive and negative after the negative end of the LED chip 5 is broken through the insulating layer 4 through the positive and negative ends of the LED. The wire is reflowed to the AC terminal, causing the LED chip 5 to be broken down.
  • the current solution is mainly insulated by placing a thermal conductive silicone sheet 6 under the LED substrate 7, and the peripheral edge of the thermally conductive silicone sheet 6 is wider than the edge of the LED substrate 7. Mm or 6.3 mm or more, and then an insulating holder 8 is disposed above the LED substrate 7 to fix the LELD substrate, thereby achieving lightning protection, and the voltage it can withstand is approximately 2-4 KV; the solution has many defects, such as The material cost and production cost are high, and the assembly is also very troublesome. Because it needs to meet the above data requirements, it takes up a lot of space, and some products are small in size and cannot be loaded at all. In addition, the LED lamp of this structure has higher thermal conductivity. difference.
  • the present invention is directed to the absence of the prior art, and a first object thereof is to provide an LED lamp panel which is simple and ingenious by adding a high voltage bypass capacitor connected to the electrical negative interface and the ground terminal on the conventional LED circuit board. Realize lightning protection against LED light source;
  • a second object of the present invention is to provide a high voltage pulse protection circuit for an LED lamp panel, which increases a high voltage bypass capacitor to form a bypass bleed path to discharge a high voltage to an output terminal, the loop not passing through the LED light source. Thereby avoiding the LED light source being broken down;
  • a third object of the present invention is to provide an LED lamp which can be easily damaged by high-voltage lightning strikes during lightning weather by reducing the LED lamp panel, thereby reducing maintenance and replacement costs and extending the LED. The life of the lamp saves the cost of use.
  • the present invention adopts the following technical solutions:
  • the utility model comprises an LED circuit board and an LED light source disposed on the LED circuit board, wherein the LED circuit board is provided with an electrical positive interface and an electrical negative interface, and the LED light source is connected between the electrical positive and negative interfaces, wherein the LED line A high-voltage bypass capacitor is added to the board, and one end of the high-voltage bypass capacitor is connected to the electrical negative interface and the other end is grounded.
  • the high voltage bypass capacitor is disposed on the LED circuit board in a patch manner.
  • the high voltage bypass capacitor is disposed on the LED circuit board in a plug-in manner.
  • the LED circuit board is an aluminum based circuit board or a ceramic based circuit board.
  • the high voltage pulse protection circuit of the LED light board comprises a power port, an LED driving circuit and an LED circuit board; wherein the LED circuit board is provided with an electrical positive interface and an electrical negative interface, and the LED driving circuit is respectively connected to the power port and An electrical positive and negative interface of the LED circuit board; a high voltage bypass capacitor is added to the LED circuit board, and one end of the high voltage bypass capacitor is connected to the electrical negative interface on the LED circuit board, and the other end is grounded.
  • the LED driving circuit is provided with a high voltage anti-noise capacitor, and one end of the high-voltage anti-noise capacitor is electrically connected to the electrical negative interface of the LED circuit board, and the other end is electrically connected to the power port.
  • An LED lamp comprises a lamp cap, an insulating seat, an LED driving power source, a metal heat sink shell, an LED light board and a lampshade.
  • the LED driving power source is installed inside the insulating seat, and the insulating seat is connected and insulated between the lamp cap and the metal heat dissipating shell.
  • the LED light board is mounted on the metal heat dissipating shell, the LED light board comprises an LED circuit board and is disposed on the LED circuit.
  • An LED light source on the board, the LED circuit board is provided with an electrical positive interface and an electrical negative interface, the LED light source is connected between the electrical positive and negative interfaces, and a high voltage bypass capacitor is added on the LED circuit board. One end of the high voltage bypass capacitor is connected to the electrical negative interface and the other end is grounded.
  • the high voltage bypass capacitor is disposed on the LED circuit board in a patch or plug-in manner.
  • the LED circuit board is an aluminum based circuit board or a ceramic based circuit board.
  • the LED circuit board and the metal heat dissipation shell are connected by a plurality of screws, and the other end of the high voltage bypass capacitor on the LED circuit board is connected to one of the screws.
  • the invention has the beneficial effects that: by adding a high voltage bypass capacitor to the LED circuit board, one end of the high voltage bypass capacitor is connected to the electrical negative interface, and the other end is connected to the screw to connect the metal.
  • the heat dissipation shell is grounded to form a bypass bleed path to discharge the high voltage to the output end.
  • the LED light source is prevented from being broken by the high voltage pulse, thereby protecting the LED light source from high voltage lightning damage, reducing maintenance and replacement.
  • the cost increases the service life of the LED lamp, saves the use cost, and is beneficial to the promotion and application of the LED lighting.
  • FIG. 1 is a schematic view showing the structure of a typical LED lamp in the prior art
  • FIG. 2 is a schematic view showing the path of a high-voltage pulse wave when the LED lamp shown in FIG. 1 is struck by lightning;
  • FIG. 3 is a schematic perspective view of a lightning protection LED lamp in the prior art
  • FIG. 4 is a schematic cross-sectional structural view of the LED lamp shown in FIG. 3;
  • Figure 5 is a partial perspective structural view of a first embodiment of the present invention.
  • Figure 6A is a front view of the product of the LED light panel in the first embodiment of the present invention.
  • Figure 6B is a circuit diagram of an LED lamp panel in the first embodiment of the present invention.
  • Figure 7 is a partial perspective structural view of a second embodiment of the present invention.
  • Figure 8 is a high voltage pulse protection circuit diagram of the LED lamp panel in the above two embodiments.
  • the LED lamp includes a lamp cap, an insulating seat, an LED driving power source 10, a metal heat sink 20, and an LED light panel 30. And the lampshade,
  • the LED driving power supply 10 is mounted inside the insulating seat.
  • the insulating seat is connected and insulated between the lamp cap and the metal heat sink 20.
  • the LED light board 30 is mounted on the metal heat sink 20, usually, the LED light board 30 and the metal heat sink. 20 is locked by multiple screws.
  • the LED lamp board 30 includes an LED circuit board 31 and an LED light source 32 disposed on the LED circuit board 31.
  • the LED circuit board 31 may be an aluminum-based circuit board or a ceramic-based circuit board. ;
  • the LED circuit board 31 is provided with an electrical positive interface and an electrical negative interface.
  • the LED light source 32 is connected between the electrical positive and negative interfaces, and a high voltage bypass capacitor is added to the LED circuit board 31.
  • One end of the circuit capacitor is connected to the electrical negative interface, and the other end is connected with one of the screws 40 to connect the metal heat sink 20 to achieve grounding.
  • the screw 40 can be used for mounting and fixing, and can also discharge leakage current.
  • the improved structure is simple and ingenious, so as to form a bypass bleed path to discharge the high voltage to the output end; thus, the LED light source 32 is prevented from being broken by the high voltage pulse, thereby protecting the LED light source 32 from high voltage lightning strikes. Damage, reduce the cost of repair and replacement, extend the service life of LED lights, save the cost of use, and facilitate the promotion and application of LED lighting.
  • the structure of the second embodiment shown in FIG. 7 is mainly different from the first embodiment in that the high voltage bypass capacitor and its electrical path are patched in the first embodiment.
  • the LED circuit board 31 is disposed on the foregoing LED circuit board 31.
  • the high voltage bypass capacitor and its lead are disposed on the LED circuit board 31 in a plug-in manner.
  • the high voltage pulse protection circuit of the LED lamp board 30 of the foregoing two embodiments is shown, which generally includes a power port, an LED driving circuit, and an LED circuit board 31.
  • the LED circuit board 31 is provided with electricity.
  • the positive electrode interface is connected to the electrical negative electrode, and the LED driving circuit is respectively connected to the electrical positive and negative interfaces of the power port and the LED circuit board 31.
  • the high voltage bypass capacitor C1 is added to the LED circuit board 31. One end of the capacitor C1 is connected to the electrical negative interface on the LED circuit board 31, and the other end is grounded.
  • the high-voltage anti-noise capacitor Y1 is electrically connected to the electrical negative interface of the LED circuit board 31, and the other end is electrically connected to the power port.
  • the high-voltage pulse When struck by lightning, the high-voltage pulse is radiated from the metal casing to the screw 40, and then drained to the high-voltage bypass capacitor C1, and then the other end of the high-voltage bypass capacitor C1 to the electrical negative interface of the LED circuit board 31, through the lead to the high voltage anti-hybrid
  • the capacitor Y1 is vented through the AC terminal, thus completing the protection loop.
  • This loop does not pass through the LED light source 32 at all, and the LED light source 32 is in a floating state, thereby avoiding high voltage damage to the LED chip.
  • the high voltage bypass capacitor C1 needs to withstand high voltage surges and is much larger than the high voltage anti-noise capacitor Y1 in order to quickly return the pulsed high voltage to the high voltage anti-noise capacitor Y1 via the high voltage bypass capacitor C1 to form a latching loop.
  • the design of the present invention is mainly focused on adding a high-voltage bypass capacitor to the LED circuit board.
  • One end of the high-voltage bypass capacitor is connected to the electrical negative interface, and the other end is connected to the screw to connect the metal heat-dissipating case to achieve grounding.
  • the LED light source is prevented from being broken by the high voltage pulse, thereby protecting the LED light source from high voltage lightning damage, reducing maintenance and replacement costs, and prolonging
  • the service life of LED lights saves the cost of use and is conducive to the promotion and application of LED lighting.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

公开了一种LED灯板、LED灯板之高压脉冲保护电路及LED灯具。LED灯具包括灯头、绝缘座、LED驱动电源（10）、金属散热壳（20）、LED灯板（30）及灯罩。LED灯板（30）通过螺丝（40）锁固于金属散热壳（20）上。LED灯板（30）包括LED线路板（31）和LED光源（32）。LED线路板（31）上设置有电性正、负极接口，LED光源（32）连接于电性正、负极接口之间。LED线路板（31）上增设有高压旁路电容（C1），高压旁路电容（C1）一端连接于电性负极接口，另一端连接于螺丝（40）上以连通金属散热壳（20）实现接地，从而形成一个旁路泄放路径来把高压泄放到输出端。如此，使LED光源避免被高压脉冲击穿，从而保护了LED光源不受高压雷击损坏。

Description

LED灯板、LED灯板之高压脉冲保护电路及LED灯具 技术领域
本发明涉及LED灯领域技术，尤其是指一种防雷击的LED灯板、LED灯板之高压脉冲保护电路及LED灯具。
背景技术
如图1和图2所示，其显示了现有技术中较具代表性的一种LED灯具的大致结构，其包括有金属外壳1、灯罩（附图中未示出）、LED驱动电源2、铝基板3（或陶瓷基板）、绝缘层4及LED芯片5等；该绝缘层4一般只能承受1-2KV的电压，如此，雷雨天气时，LED灯易受雷击而损坏；具体如图2中箭头所示，其高压脉冲由金属外壳1经铝基板3之绝缘层4打穿后，经由LED正负两端回路到LED芯片5之负端击穿绝缘层4后，由LED正负引线回流至AC端，导致LED芯片5被击穿。
如图3和图4所示，针对上述问题，目前的解决方案主要系通过用一导热硅胶片6置于LED基板7下方绝缘，该导热硅胶片6的周边缘均宽于LED基板7边缘6.3毫米或6.3毫米以上，再于LED基板7上方设置绝缘固定架8来固定LELD基板，以此来达到防雷击功能，其所能承受的电压大致为2-4KV；该方案存在诸多缺陷，例如，零件材料及制作成本较高、组装也十分麻烦，由于需要满足上述数据要求，其占用空间大，而有些产品尺寸较小根本无法装入，另外，该种结构的LED灯，其导热性较差。
因此，需要研究出一种新的技术方案来解决上述问题。
发明内容
本发明针对现有技术存在之缺失，其第一种目的是提供一种LED灯板，其通过于传统LED线路板上增设一连接于其电性负极接口和接地端的高压旁路电容，简单巧妙地实现了对LED光源的防雷击保护；
本发明之第二种目的是提供一种LED灯板之高压脉冲保护电路，其通过增加高压旁路电容来形成一个旁路泄放路径把高压泄放到输出端，此回路不经过LED光源，从而避免LED光源被击穿；
本发明之第三种目的是提供一种LED灯具，其通过对LED灯板进行简单的改良，使得雷雨天气时，该LED灯避免受到高压雷击而损坏，减少了维修及更换成本，延长了LED灯的使用寿命，节省了使用成本。
为实现上述目的，本发明采用如下技术方案：
一种LED灯板, 包括有LED线路板和设置于LED线路板上的LED光源，该LED线路板上设置有电性正极接口和电性负极接口，LED光源连接于电性正、负极接口之间，于该LED线路板上增设有高压旁路电容，该高压旁路电容一端连接于前述电性负极接口，另一端接地。
作为一种优选方案，所述高压旁路电容以贴片方式设置于前述LED线路板上。
作为一种优选方案，所述高压旁路电容以插件方式设置于前述LED线路板上。
作为一种优选方案，所述LED线路板为铝基线路板或陶瓷基线路板。
LED灯板之高压脉冲保护电路，包括电源端口、LED驱动电路、LED线路板；其中，该LED线路板上设置有电性正极接口与电性负极接口，该LED驱动电路分别连接于电源端口与LED线路板的电性正、负极接口；于该LED线路板上增设有高压旁路电容，该高压旁路电容一端连接于LED线路板上的电性负极接口，另一端接地。
作为一种优选方案，所述LED驱动电路上设置有高压防杂讯电容，该高压防杂讯电容一端电性连接于LED线路板之电性负极接口，另一端电性连接至电源端口。
一种LED灯，包括有灯头、绝缘座、LED驱动电源、金属散热壳、LED灯板及灯罩, 该LED驱动电源安装于绝缘座内部，该绝缘座连接且绝缘于灯头和金属散热壳之间，该LED灯板安装于金属散热壳上，该LED灯板包括有LED线路板和设置于LED线路板上的LED光源，该LED线路板上设置有电性正极接口和电性负极接口，LED光源连接于电性正、负极接口之间，并于该LED线路板上增设有高压旁路电容，该高压旁路电容一端连接于前述电性负极接口，另一端接地。
作为一种优选方案，所述高压旁路电容以贴片方式或插件方式设置于前述LED线路板上。
作为一种优选方案，所述LED线路板为铝基线路板或陶瓷基线路板。
作为一种优选方案，所述LED线路板与金属散热壳之间通过多个螺丝相连，前述LED线路板上高压旁路电容的另一端与其中一个螺丝相连。
本发明采用上述技术方案后，其有益效果在于：通过于该LED线路板上增设有高压旁路电容，高压旁路电容一端连接于前述电性负极接口，另一端连接于前述螺丝上以连通金属散热壳实现接地，以形成一个旁路泄放路径来把高压泄放到输出端，如此，实现LED光源避免被高压脉冲击穿，从而保护了LED光源不受高压雷击损坏，减少了维修及更换成本，延长了LED灯的使用寿命，节省了使用成本,有利于LED照明的推广应用。
附图说明
图1是现有技术中较具代表性的一种LED灯具的大致结构示意图；
图2是图1所示LED灯受雷击时高压脉冲波的路径示意图；
图3是现有技术中的防雷LED灯具之立体结构示意图；
图4是图3所示LED灯具的截面结构示意图；
图5是本发明之第一种实施例的局部立体结构示意图；
图6A是本发明之第一种实施例中LED灯板的产品主视图；
图6B是本发明之第一种实施例中LED灯板的电路图；
图7是本发明之第二种实施例的局部立体结构示意图；
图8是上述两种实施例中LED灯板之高压脉冲保护电路图。
附图标识说明：
1、金属外壳 2、LED驱动电源
3、铝基板 4、绝缘层
5、LED芯片 6、导热硅胶片
7、LED基板 8、绝缘固定架
10、LED驱动电源 20、金属散热壳
30、LED灯板 31、LED线路板
32、LED光源 40、螺丝
具体实施方式
参照图5至图8所示，其显示出了本发明之两种较佳实施例的具体结构；该LED灯包括有灯头、绝缘座、LED驱动电源10、金属散热壳20、LED灯板30及灯罩, 该LED驱动电源10安装于绝缘座内部，该绝缘座连接且绝缘于灯头和金属散热壳20之间，该LED灯板30安装于金属散热壳20上，通常，LED灯板30与金属散热壳20之间通过多个螺丝来锁固。
如图5至图6B所示，该LED灯板30包括有LED线路板31和设置于LED线路板31上的LED光源32，该LED线路板31可以为铝基线路板或陶瓷基线路板等；
该LED线路板31上设置有电性正极接口和电性负极接口，LED光源32连接于电性正、负极接口之间，并于该LED线路板31上增设有高压旁路电容，该高压旁路电容一端连接于前述电性负极接口，另一端与其中一个螺丝40相连以连通金属散热壳20实现接地，这个螺丝40既可以起到安装固定的作用，又可以起到泄放漏电流的作用，改良之结构简单、巧妙，如此，以形成一个旁路泄放路径来把高压泄放到输出端；如此，实现LED光源32避免被高压脉冲击穿，从而保护了LED光源32不受高压雷击损坏，减少了维修及更换成本，延长了LED灯的使用寿命，节省了使用成本,有利于LED照明的推广应用。
图7所示的第二种实施例的结构，相比第一种实施例而言，其主要的区别特征在于：第一种实施例中以贴片方式将高压旁路电容及其电性路径设置于前述LED线路板31上，而第二种实施例中，系以插件方式将高压旁路电容及其引线设置于前述LED线路板31上。
如图8所示，其显示了前述两种实施例的LED灯板30之高压脉冲保护电路，大致包括电源端口、LED驱动电路、LED线路板31；其中，该LED线路板31上设置有电性正极接口与电性负极接口，该LED驱动电路分别连接于电源端口与LED线路板31的电性正、负极接口；于该LED线路板31上增设有高压旁路电容C1，该高压旁路电容C1一端连接于LED线路板31上的电性负极接口，另一端接地。
前述LED驱动电路上设置有高压防杂讯电容Y1，该高压防杂讯电容Y1一端电性连接于LED线路板31之电性负极接口，另一端电性连接至电源端口。
受雷击时，高压脉冲由散热金属外壳至螺丝40，然后引流至高压旁路电容C1，再由高压旁路电容C1之另一端到LED线路板31的电性负极接口,经引线至高压防杂讯电容Y1，并通过AC端泄放，如此，完成保护回路。此回路完全没有经过LED光源32，LED光源32是处于浮空状态下，从而避免高压击伤LED芯片。
此高压旁路电容C1需能承受高压冲击，并且要远大于高压防杂讯电容Y1，以便迅速将脉冲高压经由高压旁路电容C1回流至高压防杂讯电容Y1，以形成闭锁回路。
本发明的设计重点在于，主要系通过于该LED线路板上增设有高压旁路电容，高压旁路电容一端连接于前述电性负极接口，另一端连接于前述螺丝上以连通金属散热壳实现接地，以形成一个旁路泄放路径来把高压泄放到输出端，如此，实现LED光源避免被高压脉冲击穿，从而保护了LED光源不受高压雷击损坏，减少了维修及更换成本，延长了LED灯的使用寿命，节省了使用成本,有利于LED照明的推广应用。
以上所述，仅是本发明的较佳实施例而已，并非对本发明的技术范围作任何限制，故凡是依据本发明的技术实质对以上实施例所作的任何细微修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (10)

  1. 一种LED灯板, 包括有LED线路板和设置于LED线路板上的LED光源，该LED线路板上设置有电性正极接口和电性负极接口，LED光源连接于电性正、负极接口之间，其特征在于：于该LED线路板上增设有高压旁路电容，该高压旁路电容一端连接于前述电性负极接口，另一端接地。
  2. 根据权利要求1所述的LED灯板,其特征在于：所述高压旁路电容以贴片方式设置于前述LED线路板上。
  3. 根据权利要求1所述的LED灯板,其特征在于：所述高压旁路电容以插件方式设置于前述LED线路板上。
  4. 根据权利要求1所述的LED灯板,其特征在于：所述LED线路板为铝基线路板或陶瓷基线路板。
  5. 如权利要求1所述LED灯板之高压脉冲保护电路，包括电源端口、LED驱动电路、LED线路板；其中，该LED线路板上设置有电性正极接口与电性负极接口，该LED驱动电路分别连接于电源端口与LED线路板的电性正、负极接口；其特征在于：于该LED线路板上增设有高压旁路电容，该高压旁路电容一端连接于LED线路板上的电性负极接口，另一端接地。
  6. 根据权利要求5所述的LED灯板之高压脉冲保护电路,其特征在于：所述LED驱动电路上设置有高压防杂讯电容，该高压防杂讯电容一端电性连接于LED线路板之电性负极接口，另一端电性连接至电源端口，且前述高压旁路电容大于该高压防杂讯电容。
  7. 一种LED灯，包括有灯头、绝缘座、LED驱动电源、金属散热壳、LED灯板及灯罩, 该LED驱动电源安装于绝缘座内部，该绝缘座连接且绝缘于灯头和金属散热壳之间，该LED灯板安装于金属散热壳上，其特征在于：
    该LED灯板包括有LED线路板和设置于LED线路板上的LED光源，该LED线路板上设置有电性正极接口和电性负极接口，LED光源连接于电性正、负极接口之间，并于该LED线路板上增设有高压旁路电容，该高压旁路电容一端连接于前述电性负极接口，另一端接地。
  8. 根据权利要求7所述的LED灯,其特征在于：所述高压旁路电容以贴片方式或插件方式设置于前述LED线路板上。
  9. 根据权利要求7所述的LED灯板,其特征在于：所述LED线路板为铝基线路板或陶瓷基线路板。
  10. 根据权利要求7所述的LED灯板,其特征在于：所述LED线路板与金属散热壳之间通过多个螺丝相连，前述LED线路板上高压旁路电容的另一端与其中一个螺丝相连。
PCT/CN2014/074349 2014-03-31 2014-03-31 Led灯板、led灯板之高压脉冲保护电路及led灯具 WO2015149210A1 (zh)

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