WO2014198182A1 - Led日光灯驱动电源和led日光灯 - Google Patents

Led日光灯驱动电源和led日光灯 Download PDF

Info

Publication number
WO2014198182A1
WO2014198182A1 PCT/CN2014/078587 CN2014078587W WO2014198182A1 WO 2014198182 A1 WO2014198182 A1 WO 2014198182A1 CN 2014078587 W CN2014078587 W CN 2014078587W WO 2014198182 A1 WO2014198182 A1 WO 2014198182A1
Authority
WO
WIPO (PCT)
Prior art keywords
led
electrically connected
fluorescent lamp
circuit module
pair
Prior art date
Application number
PCT/CN2014/078587
Other languages
English (en)
French (fr)
Inventor
赵依军
Original Assignee
Zhao Yijun
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhao Yijun filed Critical Zhao Yijun
Priority to EP14811685.8A priority Critical patent/EP3009740A4/en
Priority to US14/896,959 priority patent/US9970640B2/en
Publication of WO2014198182A1 publication Critical patent/WO2014198182A1/zh

Links

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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/006—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • 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
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • 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
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/015—Devices for covering joints between adjacent lighting devices; End coverings
    • 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology
    • 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
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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 present invention relates to semiconductor lighting technology, and more particularly to a power supply for LED fluorescent lamps and an LED fluorescent lamp including the same. Background technique
  • LEDs As a new type of light source, light-emitting diodes (LEDs) are widely used in various aspects of lighting because of their energy saving, environmental protection, long life and small volume.
  • LED is a solid-state semiconductor device capable of converting electrical energy into visible light. Its basic structure generally includes a leaded support, a semiconductor wafer with B on the support, and an encapsulation material (such as fluorescent silicone or epoxy) that seals the periphery of the wafer. Resin).
  • the semiconductor wafer includes a PN structure. When a current passes, electrons are pushed toward the P region. In the P region, electrons and holes recombine, and then energy is emitted in the form of photons, and the wavelength of the light is determined by the material forming the PN structure. .
  • a typical LED fluorescent tube consists of a tube body, a cover, a light board, and a drive power source, wherein the drive power source can be internal to the tube body or mounted outside the tube body.
  • Chinese invention patent 200920134372.8 discloses a fluorescent lamp for externally illuminating an LED power supply, which comprises an LED fluorescent lamp body, which is connected with an external LED power supply, the LED power supply comprises a PCB circuit board, a yoga input and output terminal, and a power supply box.
  • the PCB circuit board the B is connected to the LED fluorescent lamp body through the PCB circuit board and the output terminal.
  • the use of the external power supply requires a major change in the wiring of the fluorescent lamp, and the installation is not convenient.
  • Cida patent application 201110037855.9 discloses an LED fluorescent lamp comprising a lamp tube and an end cover mounted at both ends of the lamp tube, wherein the lamp tube comprises a lamp board, a plurality of LEDs arrayed on the lamp board, and a light-emitting cover shell located above the LED
  • a step-down constant current source module for supplying a constant current to the LED is installed in the end cover, and the positive and negative conductive terminals of the light board are connected to the output end of the step-down constant current source module.
  • the above LED fluorescent lamp is completely designed to completely shackle the original fluorescent lamp holder. Although this is beneficial to optimize the structure and circuit design of the fluorescent lamp, it is not compatible with the existing fluorescent lamp holder. Summary of the invention
  • An object of the present invention is to provide an LED fluorescent lamp driving power source which has the advantages of compact structure and compatibility with existing daylight lamps.
  • the end cover has an outer surface provided with a pair of pins, the pair of pins being hollow and communicating with the interior of the end cap;
  • each lead is inserted into a corresponding pin and fixed to an inner wall of the pin;
  • An LED drive circuit module on the substrate is provided, which is electrically connected to the lead.
  • An LED fluorescent lamp driving power supply according to another embodiment of the present invention includes:
  • each of the outer surfaces of the end caps is provided with a pair of pins, the pair of pins being hollow and communicating with the interior of the end cap;
  • a pair of substrates respectively located in respective corresponding end caps, one of each of the surfaces of the substrate is provided with a pair of leads, each of which is inserted into a pin of a corresponding end cap and fixed to an inner wall of the pin;
  • An LED driving circuit module is disposed on the pair of substrates and electrically connected to the leads.
  • the LED driving circuit module can be integrated in the end cover of the ordinary fluorescent lamp, so that the structure is more compact, and the compatibility with the existing daylight lamp is also very good.
  • the substrate further includes a pin or a socket disposed on the other surface opposite to the one surface of the substrate and electrically connected to the LED driving circuit module .
  • the LED driving circuit module comprises: a bridge rectifying and filtering unit;
  • a DC-DC boost converter unit including an inductor, a switching diode, a PWM controller, and a MOS transistor, wherein the inductor and the switching diode are connected in series at an output end of the bridge rectifying and filtering unit and the LED driving circuit module Between the positive output terminals, the drain of the MOS transistor is electrically connected between the inductor and the positive terminal of the switching diode, and the gate is electrically connected to the output of the PWM controller;
  • the anti-hunger unit includes a transistor having a base electrically connected to a negative output terminal of the LED driving circuit module, and a collector electrically connected to a control end of the PWM controller.
  • the switched DC/DC converter further includes a capacitor electrically coupled between the control terminal of the PWM controller and ground.
  • the PWM controller and the MOS transistor are integrated in the same integrated circuit chip.
  • the PWM controller, MOS transistor and transistor are integrated into the same integrated circuit chip.
  • the LED driving circuit module comprises: a bridge rectifying and filtering unit;
  • the DC-DC step-down conversion unit includes an inductor, a switching diode, a PWM controller, and a MOS transistor, wherein a cathode of the switching diode and a positive output terminal of the LED driving circuit module are connected to the bridge rectifier filter An output of the cell, a drain of the MOS transistor being electrically connected to a positive electrode of the switching diode, a gate electrically connected to an output of the PWM controller, and the inductor being electrically connected to a drain of the MOS transistor Between the pole and the negative output of the LED drive circuit module;
  • An anti-angry unit comprising a resistor connected to the MOS of the PWM controller The source of the tube.
  • the LED driving circuit module further includes a capacitor electrically connected between the positive output terminal and the negative output terminal.
  • the PWM controller and the MOS transistor are integrated in the same integrated circuit chip.
  • the LED driving circuit module includes a bridge rectifying filtering unit and a constant current control unit, wherein the constant current control unit includes an amplifier, a MOS transistor, and a first resistor, a positive output terminal of the bridge rectifier filtering unit is connected to a positive output terminal of the LED driving circuit module, and a source of the MOS transistor is electrically connected to a negative output terminal of the LED driving circuit module, and a drain of the MOS transistor Electrically coupled to a first input of the amplifier and grounded via the first resistor, an output of the amplifier being electrically coupled to a gate of the MOS transistor to be in accordance with a voltage on the drain and the amplifier
  • the comparison of the reference voltages on the second input of the device controls the turn-on and turn-off of the MOS transistors.
  • the constant current control unit further includes a second resistor electrically connected between the source and the drain of the MOS transistor.
  • the second resistor connected between the source and the drain of the MOS transistor can perform a better shunting function', which effectively reduces the heat generation amount of the MOS transistor, thereby improving the flow of the LED load. Current.
  • the constant current control unit further includes a reference voltage circuit electrically connected to the second input terminal of the amplifier.
  • the amplifier, the MOS transistor and the reference voltage circuit are integrated in the same integrated circuit chip.
  • the above LED fluorescent lamp driving power source further comprising a filter capacitor electrically connected between the positive output terminal and the negative output terminal of the bridge rectifying filter unit.
  • Another object of the present invention is to provide an LED fluorescent lamp which has the advantages of compact structure and compatibility with existing daylight lamps.
  • a light source panel located inside the tube body, on which a plurality of LED units are disposed;
  • each of the end caps is provided with a pair of pins on the outer surface thereof, the pair of pins being hollow and communicating with the interior of the end cap;
  • each of the substrates is provided with a pair of leads, each of which is inserted into a corresponding end cap Inside the pin and fixed to the inner wall of the pin;
  • An LED driving circuit module is disposed on the pair of substrates and electrically connected to leads on one of the substrates.
  • the light source panel and the substrate are an aluminum substrate or a double-sided printed circuit board.
  • the LED units are connected in series, in parallel or in a hybrid manner. Coupled figure description
  • Figure 1 is an exploded perspective view of an LED fluorescent lamp driving power supply in accordance with one embodiment of the present invention.
  • 2A is an exploded perspective view showing a variation of the driving power of the LED fluorescent lamp shown in FIG. 1.
  • FIG. 2B is an exploded perspective view showing a variation of the driving power of the LED fluorescent lamp shown in FIG. 1.
  • FIG. 3 is an exploded perspective view of an LED fluorescent lamp driving power supply according to another embodiment of the present invention.
  • Figure 4 is an exploded perspective view of an LED fluorescent lamp in accordance with one embodiment of the present invention.
  • Fig. 5 is an exploded perspective view showing a variation of the LED fluorescent lamp shown in Fig. 4.
  • Figure 6 is an exploded perspective view of an LED fluorescent lamp in accordance with another embodiment of the present invention.
  • Figure 7 is a circuit schematic diagram of an LED drive circuit module applicable to the above embodiment with the aid of Figures 1-6.
  • Figure 8 is a circuit diagram showing a variation of the LED drive circuit module shown in Figure 7.
  • Figure 9 is a circuit schematic diagram of another LED driver circuit module that can be applied to the above embodiment with the aid of Figures 1-6.
  • Figure 10 is a circuit diagram showing a variation of the LED drive circuit module shown in Figure 9.
  • FIG 11 is a circuit schematic diagram of another LED driver circuit module that can be applied to the above embodiment with the aid of Figures 1-6. detailed description
  • semiconductor wafer refers to a plurality of independent single circuits, “semiconductor wafers” or “die” formed on a semiconductor material such as silicon, gallium arsenide, etc., unless otherwise specified. This refers to such a single circuit, and “packaged chip” refers to the physical structure of the semiconductor wafer after being packaged. In a typical such physical structure, the semiconductor wafer is mounted, for example, on a support and encapsulated with a sealing material.
  • light emitting diode unit refers to a unit comprising an electroluminescent material, examples of which include, but are not limited to, P-N junction inorganic semiconductor light emitting diodes and organic light emitting diode OLEDs and polymer light emitting diodes (PLEDs).
  • the PN junction inorganic semiconductor light emitting diodes can have different structural forms including, for example, but not limited to, light emitting diode dies and light emitting diode cells.
  • light emitting diode die refers to a semiconductor wafer having a PN structure and having electroluminescence capability
  • light emitting diode cell refers to a physical structure formed by packaging a die, which is typical In a physical configuration, the die is mounted, for example, on a bracket and encapsulated with a sealing material.
  • the terms "wiring”, “wiring pattern,” and “wiring” refer to conductive patterns on the insulating surface that are used for electrical connection between components, including but not limited to traces and holes (such as soldering). Disc, component hole, fastening hole and gold sharp hole, etc.).
  • Electrodes and “coupled” are to be understood to include situations in which electrical energy or electrical signals are transmitted directly between two units, or in which electrical or electrical signals are transmitted indirectly via one or more third units.
  • Drive power supply refers to the “electronically controlled mounting” between an alternating current (AC) or direct current (DC) power supply connected to the outside of the lighting fixture and the light emitting diode as a light source, for The light emitting diode provides the required current or voltage (eg constant current, constant voltage or constant power, etc.).
  • the drive power source can be implemented in a modular configuration, for example comprising a printed circuit board and one or more mountings Components that are electrically connected together on a printed circuit board and through wiring. Examples of such components include, but are not limited to, LED driver controller chips, rectifier chips, resistors, capacitors, and inductors or coils.
  • FIG. 1 is an exploded perspective view of an LED fluorescent lamp driving power supply in accordance with one embodiment of the present invention.
  • an LED fluorescent lamp driving power source 10 according to this embodiment includes an end cap 110, a substrate 120, and an LED driving circuit module 130.
  • the end cap 110 can take the form and specifications of a conventional fluorescent lamp end cap or plug. Specifically, a pair of pins 111 and 112 are provided on the outer surface of the end cap 110, for example, by riveting, and the pair of pins can serve as an electrical interface between the lamp holder and the LED fluorescent lamp driving power source. In the present embodiment, the pins 111 and 112 are hollow and are in communication with the interior space of the end cap 110.
  • the substrate 120 is located inside the end cap 110.
  • the ordinary fluorescent lamp production process can be utilized to fix the substrate 120 in the end cap 110 while the end cap 110 is closed at both ends of the fluorescent lamp body by an adhesive such as a lamp mud.
  • a pair of leads 121 and 122 are disposed on the lower surface of the substrate 120 as shown in FIG.
  • the pair of leads are input to the respective input pins 111 and 112 as input terminals of the LED drive circuit module 130.
  • the fixing and electrical connection between the lead and the pin can be achieved by holding the inner walls of the pins 111 and 112 inwardly to clamp the leads 121 and 122, respectively.
  • the lead wires may be hard wires or soft wires.
  • a pair of pins 123 and 124 are provided on the upper surface of the substrate 120.
  • the pair of pins serve as an output of the LED drive circuit module 130 and are adapted to be electrically connected to the LED unit of the LED fluorescent lamp.
  • a socket 125 may be provided on the upper surface of the substrate 120 instead of the pin in FIG.
  • the output of the LED driving circuit module 130 may also be in the form of a via, such as a pair of vias 126a and 126b formed on the substrate 120 as shown in FIG. 2B.
  • the LED driving circuit module 130 is disposed on the upper surface of the substrate 120, and includes various components and wiring for realizing electrical connection between the components.
  • the input end of the LED driving circuit module 130 is in the form of a lead and the output end is in the form of a pin.
  • the circuit principle of the LED drive circuit module 130 will be described in detail below.
  • FIG. 3 is an exploded perspective view of an LED fluorescent lamp driving power supply according to another embodiment of the present invention.
  • the LED drive circuit module is disposed on a substrate. Unlike this layout, in the embodiment shown in Fig. 3, the components of the LED drive circuit module are distributed over two substrates, as described further below.
  • the LED fluorescent lamp driving power supply 10 includes a pair of end caps 110A and 110B, a pair of substrates 120A and 120B, and an LED driving circuit module 130, wherein the first portion 130A of the LED driving circuit module 130 (for example, a bridge rectifier circuit) and a second portion 130B (for example, a DC-DC conversion circuit and a reverse-hungry circuit, etc.) are disposed on the substrates 120A and 120B, respectively.
  • the electrical connection between the first and second portions 130A and 130B can be achieved by means of electrical connection components (e.g., connecting wires or wiring formed on the light source panel) external to the LED drive power source when the fluorescent lamps are assembled.
  • a pair of pins 111A and 112A are disposed on the outer surface of the end cap 110A to provide an electrical interface between the socket and the LED daylight driving power source.
  • the pins 111A and 112A are also hollow and are in communication with the interior space of the end cap 110A.
  • the substrate 120A is disposed inside the end cap 110A.
  • the ordinary fluorescent lamp production process can be employed to fix the substrate 120A in the end cap 110A while assembling the fluorescent lamp to save the process steps.
  • a pair of leads 121A and 122A and a pair of pins 123A and 124A are respectively disposed on the lower surface and the upper surface of the substrate 120A.
  • the leads 121A and 122A may be hard wires or flexible wires which are respectively inserted into the respective pins 111A and 112A and held by the inner walls of the pins to realize the fixing and electrical connection between the leads and the pins, thereby Kui 120A on the substrate may be a first portion 130A and 122A, and lead pins 121A and 111A 1UA external power supply (e.g. mains 2 2 0V) are electrically connected.
  • the pins 123A and 124A disposed on the upper surface of the substrate U0A provide an electrical connection interface with the other components (e.g., the second portion 130B) for the first portion 130A of the LED drive circuit module.
  • the pin can also be replaced with a slot similar to that shown in FIG. 2A or the via shown in FIG. 2B.
  • the leads 121B and 122B provided with the turns on the substrate 120B are inserted into the corresponding pins 111B and 112B and held by the inner walls of the pins, but the leads 121B and 122B are not connected to the second portion 130B of the LED drive circuit module. .
  • the leads 121B and 122B can be shorted together, thereby The pins 111B and 112B are directly connected to facilitate the installation of the LED fluorescent lamp.
  • the substrate 120B is provided with four pins, two of which can be electrically connected to the pins 123A and 124A on the substrate 120A via the wiring on the light source board, and the other two serve as the output end and the light source of the LED driving circuit module 130.
  • the LED units on the board are electrically connected. Due to the view angle, only the pin 123B in which the pin 123A is electrically connected is shown in FIG. Again, the pins here can be replaced by slots or vias.
  • the LED driving circuit module is only disposed on one surface of the substrate, alternatively, it may be disposed on the upper and lower sides of the substrate. On the surface.
  • FIG. 4 is an exploded perspective view of an LED fluorescent lamp in accordance with another embodiment of the present invention.
  • the LED fluorescent lamp 1 shown in Fig. 4 includes an LED driving power source 10, a light source module 20, and a tube body 30.
  • the light source panel of the light source module and the intermediate portion of the tube body are not shown in Fig. 4, but this does not affect the understanding of the text content.
  • the LED driving power source 10 can be disposed at both ends of the tube body 30 by the structure and features shown above with reference to FIG.
  • the light source module 20 includes a light source board 210 located in the tube body 30, an LED unit 220 disposed on the light source board, and sockets 230A and 230B disposed at two ends of the light source board, wherein the plurality of LED units on the light source board 210 can be connected in series Connected in parallel, in parallel, in a hybrid or cross array.
  • FIG. 4 is a schematic view in an exploded state, and when the LED fluorescent lamp 1 is assembled, the end caps 110A and 110B of the LED driving power source 10 will close both ends of the tubular body 30.
  • the inner surfaces of the end caps 110A and 110B can be bonded to the outer surface of the tube body 30 by means of an adhesive such as a lamp paste, and at the same time, the substrate is fixed in the end cap.
  • the substrates 120A and 120B and the light source panel 210 can be fixed together by means of the illustrated pins and sockets and thereby electrical connection of the LED driving circuit module to the LED unit.
  • suitable wiring (not shown) is formed on the light source panel 210 to electrically connect between the first and second portions 130A and 130B of the LED driving circuit modules on different substrates.
  • the substrate 120B is provided with four pins, two of which are electrically connected to the pins 123A and 124A on the substrate 120A via the wiring on the light source board, and the other two are driven as LEDs.
  • the output of circuit module 130 is electrically coupled to LED unit 220. Due to the view angle, only the pin 123B in which the pin 123A is electrically connected is shown in Fig. 4.
  • Fig. 5 is an exploded perspective view showing a variation of the LED fluorescent lamp shown in Fig. 4, showing the above-described card slot engagement mode.
  • the light source panel of the light source module and the intermediate portion of the tube body are not shown in FIG. 5, but this does not affect the understanding of the text content. As shown in FIG.
  • the substrates 120A and 120B are respectively provided with the slots 125A and 125B, and at the same time, the two ends of the light source panel 210 are respectively formed with wirings 240A and 240B, and the two ends of the light source panel 20 are inserted into the slots 125A and 125B.
  • the light source board and the substrate 110A and 110B can be fixed together.
  • the LED driving circuit module on the substrate can be electrically connected with the LED unit, and the LED driving circuit module on the different substrate is the first
  • the first and second portions 130A and 130B can also be electrically connected together via suitable wiring (not shown) formed on the light source panel. Specifically, as shown in FIG.
  • the wiring 240B includes four finger-shaped branches, two of which pass through the wiring on the light source board and two points on the wiring 240A. The electrical connections are made, and the other two are electrically connected to the LED unit 220 as an output of the LED driving circuit module 130.
  • the substrate of the LED driving power source 10 and the light source panel of the light source module 20 may be fixed together in the form of a via as shown in Fig. 2B.
  • a via hole is formed on the substrate 120A and 120B, and both ends of the light source panel 210 form a finger-shaped protruding portion adapted to the via hole, and the substrate and the light source panel can be formed by soldering the finger-shaped protruding portion in the via hole. Fixed together.
  • the tubular body 30 may be made of glass or plastic.
  • at least one of the inner surface and the outer surface of the tube formed of glass may be frosted (e.g., the inner tube surface is roughened using an acid solution).
  • Figure 6 is an exploded perspective view of an LED fluorescent lamp in accordance with another embodiment of the present invention.
  • the LED driving circuit module of the LED driving power source is disposed on a substrate, and accordingly, the LED driving power source is located at one end of the tube body.
  • the LED fluorescent lamp 1 according to the embodiment shown in Fig. 6 includes an LED driving power source 10, a light source module 20, and a tube body 30.
  • the light source panel of the light source module and the middle portion of the tube body are omitted in Fig. 6, but this does not affect the understanding of the text content.
  • the LED driving power source 10 can be disposed at one end of the tube body 30 by the structure and features shown above with reference to FIG.
  • the light source module 20 employs the same structure and features as the embodiment shown in Fig. 4, but the structure and features of the embodiment shown in Fig. 5 can also be employed.
  • the end cover 110 of the LED driving power supply 10 fixes the one end of the tubular body 30 and the light source plate 210 by means of the card slot shown in the figure and thereby achieves Electrical connections.
  • the LED fluorescent lamp 1 further includes an end cap 410 and a substrate 420 located in the end cap 410.
  • the outer surface of the end cap 410 is provided with a pair of pins 411 and 412 adapted to be inserted into the fluorescent lamp holder.
  • the other end of the tubular body 30 is closed by the end cap 410.
  • the inner surface of the end cap 410 can be bonded to the outer surface of the tubular body 30 by means of an adhesive such as a lamp paste, and at the same time, the substrate 420 is also fixed in the end cap 410.
  • a pair of leads 421 and 422 and a card slot 423 are respectively disposed on both surfaces of the substrate 420.
  • the pins 411 and 412 are also hollow and in communication with the inner space of the end cap 410, so that the leads 421 and 422 are respectively inserted into the respective corresponding pins 411 and 412 and held by the inner wall of the prong, thereby A fixed and electrical connection between the leads and the pins is achieved.
  • the pins 423A and 423B on the substrate 420 are inserted into the socket 230B at one end of the light source panel 210 to fix the light source panel 210 and the substrate 420 together.
  • leads 421 and 422 are shorted together to effect a direct connection between pins 411 and 412.
  • Figure 7 is a circuit schematic diagram of an LED drive circuit module applicable to the above embodiment with the aid of Figures 1-6.
  • the LED driving circuit module 130 shown in FIG. 7 includes a bridge rectifying filtering unit 131, a DC-DC boost converting unit 132A, and an anti-inversion unit 133, which are further described below.
  • the bridge rectification filtering unit 131 includes a full bridge rectifier BR1, capacitors C1, C2, C3, a varistor R1, and an inductor L1.
  • the alternating current (for example, mains) is rectified by the full-bridge rectifier BR1 and then outputs a full-wave ripple voltage on the positive terminal B1.
  • the filter capacitors Cl, C2, C3, varistor R1 and inductor L1 constitute an EMI filter circuit, which on the one hand suppresses the influence of high frequency interference in the AC power grid on the drive circuit, and on the other hand suppresses the electromagnetic circuit of the drive circuit to the AC grid. interference.
  • the smoothing capacitor C1 and the varistor R1 are connected in parallel between the AC input terminals B3 and B4 of the full bridge rectifier BR1, wherein the varistor R1 passes the full bridge rectifier BR1 by suppressing abnormal overvoltages present in the circuit.
  • the input voltage is clamped at a predetermined level.
  • the filter capacitors C2, C3 and inductor L1 form a ⁇ -type filter loop and are electrically connected between the positive terminal B1 and the negative terminal ⁇ 2 of the full-bridge rectifier BR1 to low-pass filter the ripple voltage output from the full-bridge rectifier BR1.
  • the DC-DC boost conversion unit 132A is electrically connected to the bridge rectification filtering unit 131, the anti-inversion unit 133, and the LED loads LED1-LEDn (that is, the plurality of LED units 220 disposed on the light source panel in FIGS. 4-6). It boosts the ripple voltage output by the bridge rectifier filtering unit 131 to the required voltage and current levels and provides it to the LED load.
  • the DC-DC boost converter unit 132A also cooperates with the reverse anger unit 133 to keep the current and voltage supplied to the LED load constant and to implement a power factor correction function.
  • the total voltage of multiple LED units connected in series is designed to exceed the maximum voltage of the grid input, so voltage boosting is required. For example, for a 220V AC with a fluctuation range of ⁇ 10%, the maximum voltage is about 342V, and the LED series voltage will exceed 342V.
  • the DC-DC boost converter unit 132A includes an inductor L2, a switching diode D1, a capacitor C6, and a switching regulator Ul.
  • an integrated circuit chip integrated with a pulse width modulation (PWM) controller and a gold-solder oxide semiconductor field effect transistor (hereinafter also referred to as a MOS transistor) may be used as the switching regulator U1, wherein the output of the PWM controller is The gate of the MOS transistor is electrically connected to control the turn-on and turn-off of the MOS transistor.
  • the switching frequency of the MOS transistor can be kept constant (for example, about 1 MHz), and the turn-off time of the MOS transistor can be adjusted; or the MOS transistor can be maintained. off-time is a fixed value (e.g., about 3 2 0ns), and the switching frequency of the MOS transistor is adjustable.
  • switching regulator chips are typically provided with a drain pin that is electrically coupled to the drain of the MOS transistor and an inverted polarity pin that is electrically coupled to the control terminal of the PWM controller.
  • Examples of the above switching regulator include, but are not limited to, CW12L30 and CW12L40 chips produced by China Puxinda Electronics Co., Ltd.
  • the inductor L2 and the switching diode D1 are connected in series between the output of the bridge rectifying and filtering unit 131 and the positive input terminal of the LED load or the positive output terminal of the LED driving circuit module, wherein the positive electrode of the switching diode D1 It is electrically connected to the inductor L2, and the negative electrode is electrically connected to the positive input terminal of the LED load.
  • a Schottky diode having a fast speed and a small voltage drop can be employed as the switching diode D1.
  • the drain pin D of the switching regulator U1 is electrically connected between the inductor L2 and the anode of the switching diode D1, and the counter debt pin FB is electrically connected to the anti-hungry unit 133.
  • the capacitor C6 and the positive input terminal of the LED load are connected to the negative terminal of the switching diode D1 to discharge the LED load when the switching diode D1 is turned off.
  • the switching regulator U1 also includes a power pin VCC and a ground pin GND, wherein the power pin VCC is grounded via capacitor C4.
  • the anti-angry unit 133 includes a transistor Q1, resistors R2, R3, and a capacitor C5.
  • the transistor Q1 adopts a connection form of a common emitter amplifying circuit, wherein the collector is electrically connected to the reverse polarity pin of the switching regulator U1 via the resistor R3 to provide an inverted signal to the switching regulator U1.
  • the emitter is electrically connected to the ground as a common ground of the input loop and the output loop, and the base is connected to the loop of the LED load by electrical connection with the cathode of the LED load to extract the detection signal.
  • Resistor R2 is electrically connected between the base and ground to form an input loop.
  • the reverse polarity pin FB of the switching regulator U1 is also grounded via capacitor C5.
  • the bridge rectification filtering unit 131 converts the input AC power into a ripple voltage and outputs it to the inductor L2 of the DC-DC boost converter unit 132A.
  • Switching regulator The MOS transistor inside U1 is turned on and off at a high frequency under the control of the PWM controller signal.
  • the MOS transistor When the MOS transistor is switched to the off state, the current flowing through the inductor L2 starts to decrease, thereby inducing an induced electromotive force at both ends of the inductor L2, the polarity of which is upper right and right negative.
  • the induced electromotive force is superimposed with the output voltage of the bridge type rectification filtering unit 131 to increase the output voltage of the bridge rectifying and filtering unit 131.
  • the superimposed voltage is higher than the voltage on the capacitor C6, so the switching diode D1 enters an on state, the LED load is powered by the inductor L2, and the capacitor C6 is also charged by the inductor L2 and until the MOS transistor is switched again to conduct. status.
  • the magnitude of the induced electromotive force depends on the duty ratio of the MOS transistor, so that the desired voltage boosting amplitude can be obtained by adjusting the duty ratio of the output signal of the PWM controller.
  • the MOS transistor is continuously switched between the above-mentioned on and off states, so that the voltage on the positive pole of the LED load is always maintained at a relatively high voltage level.
  • the LED load is connected in parallel with the resistors R4 and R5 in the negative direction of the switching diode D1 and the resistor R2, and the negative pole of the LED load is electrically connected to the base of the transistor Q1.
  • the current flowing through the base of the transistor Q1 also changes, and the inverted anger signal amplified by the transistor Q1 is output from the collector via the resistor R3 to the switch adjustment.
  • the anti-inverted pin of U1 the PWM controller can thereby adjust the duty cycle of the output signal according to the anti-angry signal, thereby keeping the current and voltage supplied to the LED load constant.
  • the reverse polarity pin FB of the switching regulator U1 is also subjected to a large-capacity capacitor.
  • C5 is grounded, which slows the response of the anti-angry loop, which is nearly constant during the half cycle of the AC line.
  • a substantially constant level of reversal indicates that the current in the MOS tube corresponds to the average energy delivered to the LED load during the half cycle of the AC line. Since the switching regulator U1 operates at a fixed frequency, the current does not increase beyond a certain range until the MOS transistor is turned on.
  • the power factor correction function can be realized by constantly tracking changes in the AC input voltage.
  • the PWM controller and the MOS transistor are integrated in the same integrated circuit chip.
  • the transistor Q1, the PWM controller and the MOS transistor can also be considered. Integrated in the same integrated circuit chip.
  • the PWM controller and the MOS transistor may also be provided in the LED driver circuit module in the form of discrete circuit components.
  • the LED drive circuit module shown in Fig. 8 shows an example of this form, and the same or similar elements as those in Fig. 7 are denoted by the same reference numerals.
  • the drive circuit module 130 shown in Fig. 8 also includes a bridge rectification filter unit 131, a DC-DC boost conversion unit 132A, and an anti-inversion unit 133.
  • the bridge rectification filtering unit 131 and the anti-starving unit 133 adopt the same form and structure as those shown in Fig. 7, and will not be described again here.
  • the DC-DC boost converter unit 132A includes an inductor L2, a switching diode D1, a capacitor C6, a PWM controller U2, and a MOS transistor T, wherein the inductor L2 and the switching diode D1 are connected in series to the bridge rectifier filtering unit.
  • the output of the 131 is connected to the positive input of the LED load or the positive output of the LED drive module.
  • the positive terminal of the switching diode D1 is electrically connected to the inductor L2, and the negative electrode is electrically connected to the LED load.
  • the drain D of the MOS transistor T is electrically connected between the inductor L2 and the anode of the switching diode D1, the source S is electrically connected to the ground, and the gate G is connected to the output terminal P of the PWM controller U2.
  • the PWM controller U2 is generally provided in the form of an integrated circuit chip, and its control terminal FB is electrically connected to the reverse anger unit 333.
  • the capacitor C6 is electrically connected between the negative electrode of the switching diode D1 and the LED load to discharge the LED load when the switching diode D1 is turned off.
  • the anti-hunce unit 133 also includes a transistor Q1, resistors R2, R3, and a capacitor C5.
  • the transistor Q1 adopts a connection form of a common emitter amplifying circuit, wherein the collector is electrically connected to the control terminal FB of the PWM controller U2 via a resistor R3 to provide an inverted signal to the PWM controller U2, the emitter and the grounding electrical
  • the connection is used as a common ground for the input loop and the output loop, and the base is connected to the loop of the LED load to extract the detection signal.
  • the control terminal FB of the PWM controller is also grounded via capacitor C5.
  • Figure 9 is a circuit schematic diagram of another LED driver circuit module that can be applied to the above embodiment with the aid of Figures 1-6.
  • the LED driving circuit module 130 shown in FIG. 9 includes a bridge rectifying filtering unit 131, a DC-DC step-down converting unit 132B, and an anti-hunting unit 133, which are further described below.
  • the bridge rectification filtering unit 131 includes a full bridge rectifier BR1, capacitors C2, C3, a varistor R1, and an inductor L1.
  • the alternating current (for example, mains) is rectified by the full bridge rectifier BR1 and outputs a full-wave ripple voltage on the positive terminal B1.
  • the filter capacitors C2, C3, the varistor R1 and the inductor L1 constitute an EMI filter circuit, which on the one hand suppresses the influence of high frequency interference in the AC power grid on the drive circuit, and on the other hand suppresses the electromagnetic interference of the drive circuit to the AC grid.
  • the varistor R1 is connected in parallel between the AC input terminals B3 and B4 of the full-bridge rectifier BR1, wherein the varistor R1 clamps the input voltage of the full-bridge rectifier BR1 by suppressing an abnormal overvoltage occurring in the circuit.
  • the filter capacitors C2, C3 and inductor L1 form a ⁇ -type filter loop and are electrically connected between the positive terminal B1 of the full-bridge rectifier BR1 and the negative terminal ⁇ 2 of the ground to low-pass filter the ripple voltage output from the full-bridge rectifier BR1.
  • the DC-DC step-down conversion unit 132B is electrically connected to the bridge rectification filtering unit 131, the anti-angry unit 133, and the LED load LED1-LEDn (for example, the LED unit 220 provided on the light source panel 210 in FIGS. 4-6), which will bridge
  • the ripple voltage output by the rectification filtering unit 131 is reduced to a desired voltage and current level and supplied to the LED load.
  • DC-DC buck conversion unit 132B also cooperates with anti-aggression unit 133 to maintain a constant current and voltage supplied to the LED load.
  • the DC-DC step-down conversion unit 132B includes an inductor L 2 , a switching diode D1, a capacitor C, a MOS transistor T, and a pulse width modulation (PWM) controller U3.
  • PWM pulse width modulation
  • the output terminal P of the PWM controller U3 is electrically connected to the gate G of the MOS transistor T to control the turn-on and turn-off of the MOS transistor.
  • Examples of the above PWM controller include, but are not limited to, the HV9910 type LED driver chip manufactured by Supertex Corporation of the United States.
  • the negative electrode of the switching diode D1 and the positive electrode LED of the LED load or the positive output terminal of the LED driving circuit module are connected in common to the output end of the bridge rectifying and filtering unit 131, and the positive electrode of the switching diode D1 is connected to the MOS transistor T.
  • the drain D is electrically connected.
  • a Schottky diode having a fast speed and a small voltage drop can be employed as the switching diode D1.
  • Inductor L2 is electrically connected between the negative LED of the LED load and the drain D of the MOS transistor T.
  • the PWM controller U3 also includes an anti-angry pin FB that is electrically coupled to the anti-angry unit 133.
  • the capacitor C7 is connected in parallel to the positive LED+ and the negative LED of the LED load (ie, the anode output and the negative output of the LED driving circuit module are smoothly supplied to the LED).
  • Operating voltage of the load The capacitance value of capacitor C7 can be selected according to the ripple value of the permissible operating voltage.
  • the PWM controller U3 also includes a power pin VCC and a ground pin GND, where the power pin VCC is grounded via capacitor C4.
  • the anti-starving unit 133 includes a resistor R6. As shown in FIG. 9, the resistor R6 is electrically connected between the source S of the MOS transistor T and the ground. On the other hand, one end of the resistor R6 electrically connected to the source S is also electrically connected to the reverse polarity pin FB of the PWM controller U3 to supply an inverted flag signal to the PWM controller U3.
  • the operation of the LED drive circuit module 130 shown in Fig. 9 will be described below.
  • the bridge rectifying filtering unit 131 converts the input alternating current into a ripple voltage and outputs it to the DC-DC step-down converting unit 132B.
  • the MOS transistor T is continuously switched between the above-mentioned on and off states, so that the voltage across the LED load is always maintained at a certain voltage level.
  • the switching diode D1 when the MOS transistor T is turned on, the switching diode D1 is in an off state.
  • the output current of the bridge type rectifying and filtering unit 131 flows from the positive LED + of the LED load and flows from the negative LED to the inductor L2.
  • the current flowing through the inductor L2 will continue to increase until the MOS transistor T is turned off.
  • the energy stored in the inductor is also constantly increasing.
  • the MOS transistor T When the MOS transistor T is switched to the off state, the current flowing through the inductor L2 starts to decrease, thereby inducing an induced electromotive force at both ends of the inductor L2, the polarity of which is left positive and right negative.
  • the induced electromotive force is superimposed on the output voltage of the bridge rectification filtering unit 131 and is higher than the voltage on the capacitor C7, so the switching diode D1 enters an on state, thereby providing a freewheeling path for the current of the inductor L2 until the MOS transistor T is switched again.
  • the desired voltage reduction can be obtained by adjusting the duty cycle of the PWM controller output signal.
  • resistor R6 is electrically connected between source S of MOS transistor T and ground. Since the voltage across resistor R6 corresponds to the current flowing through MOS transistor T and inductor L2, this voltage can be applied to the anti-hunger pin FB of PWM controller U3 as an anti-angry signal. Specifically, when the MOS transistor T is turned on, the current of the inductor L2 is continuously increased. When the voltage across the resistor R6 exceeds a preset peak current detection threshold, the PWM controller U3 is triggered to output on the pin P. The control signal of the MOS transistor T is turned off, whereby constant current control can be realized by controlling the peak current of the MOS transistor T. Obviously, the time it takes to reach the peak current is related to the inductance of the inductor L2. The larger the inductor value, the slower the current rise rate and the longer it takes to reach the peak current, and vice versa.
  • capacitor C7 is connected in parallel between the LED loads as shown in Fig. 9, the ripple of the current can be smoothed, so that the current flowing through the LED load is more constant.
  • the PWM controller U3 and the MOS transistor T may be provided in the LED driver circuit module in the form of being integrated in the same integrated circuit chip.
  • the LED drive circuit module shown in Fig. 10 shows an example of this form, and the same or similar elements as those in Fig. 9 are denoted by the same reference numerals.
  • the LED drive circuit 130 shown in Fig. 10 also includes a bridge rectification filtering unit 131, a DC-DC step-down conversion unit 132B, and an anti-inversion unit 133.
  • the bridge rectification filtering unit 131 and the anti-starving unit 133 adopt the same form and structure as those shown in Fig. 9, and are not described herein again.
  • the DC-DC step-down conversion unit 132B is electrically connected to the bridge rectification filtering unit 131, the anti-inversion unit 133, and the LED loads LED1-LEDn, which reduces the ripple voltage output from the bridge rectification filtering unit 131 to a desired voltage and current level. And to provide LED load.
  • DC-DC buck conversion unit 132B also cooperates with anti-aggression unit 133 to maintain a constant current and voltage supplied to the LED load.
  • the DC-DC step-down conversion unit 132B includes an inductor L2, a switching diode D1, a capacitor C7, and a switching regulator U4.
  • an integrated circuit integrated with a pulse width modulation (PWM) controller and a MOS transistor can be used
  • the chip acts as a switching regulator U4, wherein the output of the PWM controller is electrically coupled to the gate of the MOS transistor to effect control of turn-on and turn-off of the MOS transistor.
  • switching regulator chips are typically provided with a drain pin that is electrically coupled to the drain of the MOS transistor and a source pin that is electrically coupled to the source of the MOS transistor, and preferably, the source pin is The control terminal of the PWM controller is electrically connected to invert the detection signal corresponding to the current flowing through the MOS transistor to the PWM controller. Examples of the above switching regulator include, but are not limited to, the SSL2108X type LED lighting driver chip manufactured by NXP Semiconductors of the Netherlands.
  • the cathode of the switching diode D1 and the anode LED+ of the LED load are connected in common to the output of the bridge rectifier filtering unit 131, and the anode of the switching diode D1 is electrically connected to the drain pin D of the switching regulator U4.
  • Inductor L2 is electrically connected between the negative LED of the LED load and the drain pin D of the switching regulator U4.
  • the switching regulator U4 also includes a source pin S that is electrically coupled internally to the control terminal of the PWM controller and externally to the anti-angry unit 433 outside the chip.
  • the capacitor C7 is connected in parallel between the positive LED+ and the negative LED of the LED load to smooth the operating voltage supplied to the LED load.
  • the switching regulator U4 includes a power pin VCC and a ground pin GND, wherein the power pin VCC is grounded via capacitor C4.
  • the anti-hunce unit 133 includes a resistor R6 electrically connected between the source S of the switching regulator U4 and the ground. As indicated in the description of the LED drive circuit module shown in FIG. 9, the voltage across the resistor R6 corresponds to the current flowing through the MOS transistor and the inductor L2, which is applied as a counter-increment signal to the source of the switching regulator U4.
  • the pole S is such that the PWM controller inside the switching regulator U4 realizes constant current control by controlling the peak current of the MOS transistor.
  • the operation principle of the LED driving circuit shown in Fig. 10 is similar to that shown in Fig. 9, and therefore will not be described again here.
  • circuits for implementing other functions may be integrated in the LED driving circuit module shown in FIG. 7-10.
  • These circuits may be integrated in the same semiconductor wafer or packaged chip as the drive controller, or these circuits may be provided separately in the form of semiconductor wafers or packaged chips, or some or all of these circuits may be combined together and on a semiconductor wafer or Available in the form of a packaged chip.
  • Figure 11 is a circuit schematic diagram of another LED driver circuit module that can be applied to the above embodiment with the aid of Figures 1-6.
  • the LED drive circuit module 130 shown in Fig. 11 includes a bridge rectification filter unit 131 and a constant current control unit 134, which will be further described below.
  • the bridge rectification filtering unit 131 includes a full bridge rectifier BR1, a smoothing capacitor C1, and a varistor R1.
  • the AC power (for example, the mains) is rectified by the full-bridge rectifier BR1 and then outputs a full-wave ripple voltage on the bridge rectifier filter unit or the positive output terminal B1 of the full-bridge rectifier BR1.
  • the varistor R1 is connected in parallel between the bridge rectifier filtering unit or the AC input terminals B3 and B4 of the full-bridge rectifier BR1, which clamps the input voltage of the full-bridge rectifier BR1 to a predetermined value by suppressing an abnormal overvoltage occurring in the circuit. Level.
  • the filter capacitor C1 is electrically connected between the positive output terminal B1 and the negative output terminal B2 of the bridge rectifier filter unit or the full bridge rectifier BR1 to low-pass filter the ripple voltage outputted by the full bridge rectifier BR1, where the negative output terminal B2 Grounded. It is worth noting that although full-wave rectification is shown here, half-wave rectification is also available. Further, in order to further simplify the circuit configuration, the varistor R and the smoothing capacitor C1 in the bridge rectifying and filtering unit 131 of the circuit shown in Fig. 11 can also be omitted.
  • the constant current control unit 134 includes a reference voltage circuit 1341, an amplifier 1342, a MOS transistor T, a first resistor R7, and a second resistor R8.
  • the LED load LED1-LEDn (for example, the LED unit 220 disposed on the light source panel 210 in FIGS. 4-6) is connected between the bridge filtering unit 131 and the constant current control unit 134, wherein the LED load LED1-LEDn
  • the positive LED+ is electrically connected to the positive output B1 and its negative LED is electrically connected to the source S of the MOS transistor T, while the drain D of the MOS transistor T is grounded via the first resistor R7, thereby forming a current loop.
  • the gate G of the MOS transistor T is electrically connected to the output of the amplifier 1342, and the drain D is electrically connected to the first input of the amplifier 1342 (for example, the inverting input terminal) in addition to being electrically connected to the first resistor R7.
  • the sampling signal VR1 across the first resistor R7 is applied to the intrusion terminal.
  • the reference voltage circuit is electrically coupled to a second input of amplifier I 342 (eg, a non-inverting input +) to apply a reference voltage Vref to the input.
  • a second resistor R8 is electrically connected between the source S and the drain D of the MOS transistor T.
  • the reference voltage circuit, the amplifier and the MOS transistor can be integrated in the same integrated circuit chip.
  • integrated circuit chips include, but are not limited to, the CW11L01 chip produced by Shanghai Puxinda Electronics Co., Ltd.
  • the MOS transistor T itself has a certain internal resistance, so the second resistor R8 connected between the source S and the drain D of the MOS transistor T is equivalent to the MOS transistor T.
  • a resistor is connected in parallel with the internal resistance, so that the current flowing through the LED load LED1-LEDn does not all flow into the MOS transistor T, but a part is shunted to the second resistor R8, thereby reducing the heat generation of the MOS transistor.
  • the operating current of the LED load can be increased in the case of a MOS tube using the same electrical parameters.
  • the difference between the signals applied to the two input terminals of the amplifier 1342 is amplified to form a gate voltage signal on the gate G of the MOS transistor T to control the turn-on and turn-off of the MOS transistor T3 ⁇ 4, thereby flowing through
  • the LED load LED1-LEDn has a constant current. Specifically, when the current flowing through the LED load LED1-LEDn causes the sampling signal V R1 across the first resistor R7 to be greater than the reference voltage, the amplifier 1342 will apply a low level signal on the gate G to turn off the MOS transistor T.
  • the resistance value of the current loop is large, so that the current flowing through the LED load LED1-LEDn is decreased; conversely, when the current flowing through the LED load LED1-LEDn is such that the sampling signal V R1 across the first resistor R7 is smaller than At the reference voltage, the J3 ⁇ 4 amplifier 1342 will apply a high level signal on the gate G to turn on the MOS transistor T, at which time the resistance value of the current loop is small, so that the current flowing through the LED loads LED1-LEDn is large. The current flowing through the LED loads LED1-LEDn will thus remain substantially constant. While some aspects of the present invention have been shown and described, it will be understood by those skilled in the art that the invention may be modified without departing from the spirit and scope of the invention. Equivalent content is limited.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

一种LED日光灯驱动电源（10）以及包含该驱动电源的LED日光灯（1）。其中LED日光灯驱动电源（10）包括：端盖（110A、110B），其外表面上设置一对插脚（111A、112A、111B、112B），该对插脚（111A、112A、111B、112B）是空心的并且与所述端盖（110A、110B）内部连通；位于所述端盖（110A、110B）内的基板（120A、120B），所述基板（120A、120B）的其中一个表面上设置一对引线（121A、122A、121B、122B），每个引线（121A、122A、121B、122B）插入各自对应的插脚（111A、112A、111B、112B）内并且固定于插脚（111A、112A、111B、112B）的内壁；设置在所述基板（120A、120B）上的LED驱动电路模块（130A、130B），其与所述引线（121A、122A、121B、122B）电气连接。

Description

LED日光灯驱动电源和 LED日光灯 技术领域
本发明涉及半导体照明技术，特别涉及 LED 日光灯驱动的电源以及包含 该驱动电源的 LED日光灯。 背景技术
发光二极管（LED )作为一种新型的光源，具有节能、 环保、 寿命长、 体 积小等特点，正在被广泛应用于照明领域的各个方面。 LED 是一种能够将电 能转换为可见光的固态半导体器件，其基本结构一般包括带引线的支架、设 B 在支架上的半导体晶片以及将该晶片四周密封起来的封装材料（例如荧光硅胶 或环氣树脂）。 上述半导体晶片包含有 P-N结构，当电流通过时，电子被推向 P区，在 P区里电子与空穴复合，然后以光子的形式发出能量，而光的波长则 由形成 P-N结构的材料决定。
与传统日光灯相比， LED 日光灯具有光电转换效率高、 光源亮度恒定、 无频闪和不含有害重金厲等诸多优点。 典型的 LED 日光灯管由灯管管体、 端 盖、灯板和驱动电源组成，其中驱动电源可以内 B于管体或者安装在管体外部。
中国发明专利 200920134372.8公开了一种将 LED电源外匱的日光灯，其 包括 LED日光灯体，该灯体上连接有外匱的 LED电源，该 LED电源包括 PCB 电路板、 瑜入和输出端子、 电源盒，PCB电路板内 B于电源盒中 ，瑜入端子通 过 PCB电路板、输出端子与 LED日光灯体连接。采用外匱电源需要对日光灯 的接线方式作较大的改动，而且安装也不方便。
中国发明专利申请 201110037855.9公开了一种 LED日光灯，其包括灯管 和安装在灯管两端的端盖，其中灯管包括灯板、 阵列在灯板上的多颗 LED以 及位于 LED上方的出光罩壳，端盖内安装有向 LED提供恒定电流的降压恒流 源模块，灯板的正负极导电端被连接至降压恒流源模块的输出端。需要指出的 是，上述 LED 日光灯在设计上完全摒弃了原有日光灯座的束缚，虽然这有利 于优化日光灯结构和电路设计，但是与已有日光灯座的兼容性不佳。 发明内容
本发明的一个目的是提供一种 LED 日光灯驱动电源，其具有结构紧凑和 与现有日光灯具兼容性强等优点。
按照本发明的一个实施例的 LED日光灯驱动电源包括：
端盖，其外表面上设匱一对插脚，该对插脚是空心的并且与所述端盖内部 连通；
位于所述端盖内的基板，所述基板的其中一个表面上设 B—对引线，每个 引线插入各自对应的插脚内并且固定于插脚的内壁；
设 B在所述基板上的 LED驱动电路模块，其与所述引线电气连接。 按照本发明另一个实施例的 LED日光灯驱动电源包括：
一对端盖，每个所述端盖的外表面设匱一对插脚，该对插脚是空心的并且 与该端盖内部连通；
一对基板，其分别位于各自对应的端盖内，每个所述基板的其中一个表面 上设匱一对引线，每个引线插入各自对应的端盖的插脚内并固定于插脚的内 壁；以及
LED驱动电路模块，其设匱在所述一对基板上并且与引线电气连接。 在上述实施例中 ， LED 驱动电路模块可被集成在普通日光灯的端盖内， 使得结构更为紧溱，而且与现有日光灯具的兼容性也非常好。
优选地，在上述 LED 日光灯驱动电源中 ，所述基板进一步包括插针或插 槽，其设匱在与基板的所述其中一个表面相对的另一表面上并且与所述 LED 驱动电路模块电气连接。
优选地，在上述 LED 日光灯驱动电源，其中 ，所述插脚的内壁向内收縮 以将其内的引线夹持住。可以利用现有的日光灯生产工艺实现这种引线夹持结 构，有助于降低制造成本。
优选地，在上述 LED日光灯驱动电源中 ，所述 LED驱动电路模块包含： 桥式整流滤波单元；
DC-DC升压变换单元，包括电感器、 开关二极管、 PWM控制器和 MOS 管，其中 ，所述电感器和开关二极管串联在所述桥式整流滤波单元的输出端与 所述 LED驱动电路模块的正极输出端之间 ，所述 MOS管的漏极电气连接在 所述电感器与开关二极管的正极之间 ，栅极与所述 PWM控制器的输出端电气 连接；以及
反饿单元，包括晶体三极管，其基极电气连接至所述 LED驱动电路模块 的负极输出端，集电极电气连接至所述 PWM控制器的控制端。
更好地，在上述灯头内，所述开关型 DC/DC变换器还包含电气连接在所 述 PWM控制器的控制端与接地之间的电容器。
更好地，在上述灯头内，所述 PWM控制器和 MOS管被集成在同一集成 电路芯片中。
更好地，在上述灯头内，所述 PWM控制器、 MOS管和晶体三极管被集 成在同一集成电路芯片中。
优选地，在上述 LED日光灯驱动电源中 ，所述 LED驱动电路模块包含： 桥式整流滤波单元；
DC-DC降压变换单元，包括电感器、 开关二极管、 PWM控制器和 MOS 管，其中，所述开关二极管的负极和所述 LED驱动电路模块的正极输出端共 接于所述桥式整流滤波单元的输出端，所述 MOS管的漏极与所述开关二极管 的正极电气连接，栅极与所述 PWM控制器的输出端电气连接，并且所述电感 器电气连接在所述 MOS管的漏极与所述 LED驱动电路模块的负极输出端之 间；以及
反愤单元，包括电阻器，其与所述 PWM控制器的控制端共接于所述 MOS 管的源极。
更好地，在上述 LED日光灯驱动电源中 ，所述 LED驱动电路模块还包含 电气连接在所述正极输出端与负极输出端之间的电容器。
更好地，在上述 LED 日光灯驱动电源中 ，所述 PWM控制器和 MOS管 被集成在同一集成电路芯片中。
优选地，在上述 LED日光灯驱动电源中 ，所述 LED驱动电路模块包含桥 式整流滤波单元和恒流控制单元，其中 ，所述恒流控制单元包括放大器、 MOS 管、 第一电阻器，所述桥式整流滤波单元的正极输出端与所述 LED驱动电路 模块的正极输出端连接，所述 MOS管的源极与所述 LED驱动电路模块的负 极输出端电气连接，所述 MOS管的漏极与所述放大器的第一输入端电气连接 并且经所述第一电阻器接地，所述放大器的输出端与所述 MOS管的栅极电气 连接以根据所述漏极上的电压与所述放大器器的第二输入端上的基准电压的 比较结果来控制所述 MOS管的导通和关断。
优选地，在上述 LED 日光灯驱动电源中 ，所述恒流控制单元进一步包括 第二电阻器，其电气连接在所述 MOS管的源极与漏极之间。
在上述 LED 日光灯驱动电源中 ，连接在 MOS管源极与漏极之间的第二 电阻器可以起到较好的分流作用 '这有效降低 MOS管的发热量，从而能够提 高流经 LED负载的电流。
优选地，在上述 LED 日光灯驱动电源中 ，所述恒流控制单元还包括基准 电压电路，其与所述放大器的第二输入端电气连接。
优选地，在上述 LED日光灯驱动电源中 ，所述放大器、 MOS管和基准电 压电路被集成在同一集成电路芯片中。
优选地，在上述 LED 日光灯驱动电源中 ，进一步包括电气连接在所述桥 式整流滤波单元的正极输出端与负极输出端之间的滤波电容器。
本发明的另一个目的是提供一种 LED 日光灯，其具有结构紧溱和与现有 日光灯具兼容性强等优点。
按照本发明另一个实施例的 LED日光灯包括：
管体；
位于所述管体内部的光源板，其上设匱多个 LED单元；
封闭所述管体两端的一对端盖，每个所述端盖的外表面上设匱一对插脚， 该对插脚是空心的并且与该端盖内部连通；
一对基板，其分别位于各自对应的端盖内并且与所述光源板固定在一起， 每个所述基板的其中一个表面上都设匱一对引线，每个引线插入各自对应的端 盖的插脚内并固定于插脚的内壁；以及
LED 驱动电路模块，其设匱在所述一对基板上并且与其中一个基板上的 引线电气连接。
优选地，在上述 LED 日光灯中 ，所述光源板和基板为铝基板或双面印刷 电路板。
优选地，在上述 LED日光灯中 ，所述 LED单元以串联、 并联或混联方式 耦合 附图说明
本发明的上述和 /或其它方面和优点将通过以下结合附图的描述变得更加 清晰和更容易理解，附图中相同或相似的单元采用相同的标号表示。
图 1为按照本发明一个实施例的 LED日光灯驱动电源的分解示意图。 图 2A为图 1所示 LED日光灯驱动电源的变化形式的分解示意图。
图 2B为图 1所示 LED日光灯驱动电源的变化形式的分解示意图。
图 3为按照本发明另一个实施例的 LED日光灯驱动电源的分解示意图。 图 4为按照本发明一个实施例的 LED日光灯的分解示意图。
图 5为图 4所示 LED日光灯的变化形式的分解示意图。
图 6为按照本发明另一个实施例的 LED日光灯的分解示意图。
图 7为可应用于上面借助图 1-6所示实施例的一种 LED驱动电路模块的 电路原理图。
图 8为图 7所示 LED驱动电路模块的变化形式的电路原理图。
图 9为可应用于上面借助图 1-6所示实施例的另一种 LED驱动电路模块 的电路原理图。
图 10为图 9所示 LED驱动电路模块的变化形式的电路原理图。
图 11为可应用于上面借助图 1-6所示实施例的另一种 LED驱动电路模块 的电路原理图。 具体实施方式
下面参照其中图示了本发明示意性实施例的附图更为全面地说明本发明。 但本发明可以按不同形式来实现，而不应解读为仅限于本文给出的各实施例。 给出的上述各实施例旨在使本文的披露全面完整，更为全面地传达给本领域技 术人 本发明的保护范围。
在本说明书中，除非特别说明，术语 "半导体晶圆 "指的是在半导体材 例 如硅、砷化镓等）上形成的多个独立的单个电路，"半导体晶片"或"晶片（ die )，， 指的是这种单个电路，而"封装芯片，，指的是半导体晶片经过封装后的物理结 构，在典型的这种物理结构中 ，半导体晶片例如被安装在支架上并且用密封材 料封装。
术语"发光二极管单元"指的是包含电致发光材料的单元，这种单元的例子 包括但不限于 P-N结无机半导体发光二极管和有机发光二极 OLED和聚合 物发光二极管（PLED ) )。
P-N结无机半导体发光二极管可以具有不同的结构形式，例如包括但不限 于发光二极管管芯和发光二极管单体。其中 ，"发光二极管管芯"指的是包含有 P-N结构的、 具有电致发光能力的半导体晶片，而"发光二极管单体"指的是将 管芯封装后形成的物理结构，在典型的这种物理结构中，管芯例如被安装在支 架上并且用密封材料封装。 术语"布线"、 "布线图案，，和"布线展 "指的是在绝缘表面上布匱的用于元器 件间电气连接的导电图案，包括但不限于走线（ trace )和孔（如焊盘、元件孔、 紧固孔和金厲化孔等）。
"电气连接"和"耦合"应当理解为包括在两个单元之间直接传送电能量或 电信号的情形，或者经过一个或多个第三单元间接传送电能量或电信号的情 形。
"驱动电源，，或" LED驱动电源"指的是连接在照明装匱外部的交流（ AC ) 或直流（ DC )电源与作为光源的发光二极管之间的"电子控制装匱"，用于为 发光二极管提供所需的电流或电压（例如恒定电流、恒定电压或恒定功率等）。 在具体的实施方案中 ，驱动电源可以模块化的结构实现，例如其包含印刷电路 板和一个或多个安装在印刷电路板上并通过布线电气连接在一起的元器件，这 些元器件的例子包括但不限于 LED驱动控制器芯片、 整流芯片、 电阻器、 电 容器和电感器或线圈等。
诸如"包含"和"包括"之类的用语表示除了具有在说明书和权利要求书中 有直接和明确表述的单元和步骤以外，本发明的技术方案也不排除具有未被直 接或明确表述的其它单元和步骤的情形。
诸如"第一"、 "第二"、 "第三，，和"第四"之类的用语并不表示单元在时间、 空间、 大小等方面的顺序而仅仅是作区分各单元之用。
诸如"物体 A设匱在物体 B的表面 "之类的用语应该广义地理解为将物体 A直接放匱在物体 B的表面，或者将物体 A放匱在与物体 B有接触的其它物 体的表面。 以下借助附图描述本发明的实施例。
图 1为按照本发明一个实施例的 LED日光灯驱动电源的分解示意图。 如图 1所示，按照本实施例的 LED日光灯驱动电源 10包括端盖 110、 基 板 120和 LED驱动电路模块 130。
端盖 110可采用普通日光灯端盖或堵头的样式和规格。具体而言，在端盖 110的外表面上例如通过铆接固定方式设匱一对插脚 111和 112，该对插脚可 作为灯座与 LED 日光灯驱动电源之间的电气接口。 在本实施例中 ，插脚 111 和 112是空心的并且与端盖 110内部空间是连通的。
在完成装配的 LED日光灯驱动电源 10中 ，基板 120位于端盖 110内部。 例如可以利用普通日光灯生产工艺，在借助灯泥之类的粘合剂将端盖 110封闭 日光灯管体两端的同时将基板 120也固定于端盖 110内。如图 1所示基板 120 的下表面上设匱一对引线 121和 122。 该对引线作为 LED驱动电路模块 130 的输入端，被分别插入各自对应的插脚 111和 112内。 通过使插脚 111和 112 的内壁向内收縮而分别夹持住引线 121和 122，可以实现引线与插脚之间的固 定和电气连接。 为此，可以利用现有的日光灯生产设备，在将引线插入各自的 插脚内之后，挤压插脚的外表面使其内壁收縮。在本实施例中 ，引线可以为硬 质导线或软质导线。 参见图 1，在基板 120的上表面上设匱一对插针 123和 124。 该对插针作 为 LED驱动电路模块 130的输出端，适于与 LED日光灯的 LED单元电气连 接。 可选地，如图 2A所示，也可以在基板 120的上表面上设匱插槽 125代替 图 1中的插针。 或者可选地， LED驱动电路模块 130的输出端也可以采用过 孔的形式，例如如图 2B所示的在基板 120上形成的一对过孔 126a和 126b。
如图 1所示， LED驱动电路模块 130被设匱在基板 120的上表面，其包 含各种元器件以及实现元器件之间电气连接的布线。 在本实施例中 ， LED 驱 动电路模块 130 的输入端采用引线的形式并且输出端采用插针的形式。 有关 LED驱动电路模块 130的电路原理将在下面作详细描述。
图 3为按照本发明另一个实施例的 LED日光灯驱动电源的分解示意图。 在图 1所示的实施例中 ， LED驱动电路模块被设匱在一个基板上。 与该 布局不同，在图 3所示的实施例中 ， LED驱动电路模块的元器件被分散设匱 在两个基板上，以下作进一步的描述。
如图 3所示，按照本实施例的 LED日光灯驱动电源 10包括一对端盖 110A 和 110B、 一对基板 120A和 120B以及 LED驱动电路模块 130，其中 ， LED 驱动电路模块 130的第一部分 130A(例如桥式整流电路）和第二部分 130B(例 如 DC-DC变换电路和反饿电路等）分别设匱在基板 120A和 120B上。优选地， 可以在将日光灯装配在一起时借助位于 LED 驱动电源外部的电气连接部件 (例如连接导线或形成于光源板上的布线）实现第一和第二部分 130A和 130B 之间的电气连接。
端盖 110A 的外表面上设匱一对插脚 111A和 112A以提供灯座与 LED日 光灯驱动电源之间的电气接口。 插脚 111A和 112A 也是空心的并且与端盖 110A内部空间是连通的。
在完成装配的 LED 日光灯驱动电源 10中 ，基板 120A设匱在端盖 110A 内部。如上所述，可以采用普通日光灯生产工艺，在装配日光灯的同时将基板 120A固定于端盖 110A内以节省工艺步骤。基板 120A的下表面和上表面上分 别设匱一对引线 121A和 122A以及一对插针 123A和 124A。引线 121A和 122A 可以是硬质导线或软质导线，它们被分别插入各自对应的插脚 111A和 112A 内并且被插脚的内壁夹持住以实现引线与插脚之间的固定和电气连接，从而使 得设匱在基板 120A上的第一部分 130A可经引线 121A和 122A以及插脚 111A 和 1UA与外部电源（例如 220V市电）电气连接。设匱在基板 U0A上表面的 插针 123A和 124A则为 LED驱动电路模块的第一部分 130A提供了与其它部 件（例如第二部分 130B )的电气连接接口。 在本实施例中 ，插针也可以被替 换为类似于图 2A所示的插槽或者图 2B所示的过孔。
对于端盖 110B和设匱其内的基板 120B，它们具有与端盖 110A和基板 120A基本相同或类似的结构和特征 ,因此这里着重描述差异之处。具体而言， 基板 120B上设匱的引线 121B和 122B插入各自对应的插脚 111B和 112B内 并且被插脚的内壁夹持住，但是引线 121B和 122B与 LED驱动电路模块的第 二部分 130B并不相连。优选地，可以将引线 121B和 122B短接在一起，由此 使得插脚 111B和 112B直接连接以方便 LED日光灯的安装。此外，基板 120B 上设匱 4个插针，其中两个可经光源板上的布线与基板 120A上的插针 123A 和 124A电气连接，另外两个则作为 LED驱动电路模块 130的输出端与光源板 上的 LED单元电气连接。由于视图角度的原因，图 3中仅画出其中与插针 123A 电气连接的插针 123B。 同样，这里的插针也可以替换为插槽或过孔的形式。
值得指出的是，虽然在上述图 1-3所示的实施例中， LED驱动电路模块 仅设匱在基板的一个表面上，但是可选地，也可以将其设匱在基板的上下两个 表面上。
图 4为按照本发明另一个实施例的 LED日光灯的分解示意图。
图 4所示的 LED日光灯 1包括 LED驱动电源 10、光源模块 20和管体 30。 为示意方便起见，光源模块的光源板以及管体的中间部分未在图 4中示出，但 是这并不会影响到对文字内容的理解。
LED驱动电源 10可采用上面借助图 3所示的结构和特征，其被设匱在管 体 30的两端。光源模块 20包括位于管体 30内的光源板 210、设匱在光源板上 的 LED单元 220以及设匱在光源板两端的插座 230A和 230B，其中，光源板 210上的多个 LED单元可以串联、 并联、 混联或交叉阵列等方式连接在一起。
此外应该理解的是，图 4所示的是分解状态下的示意图，当 LED日光灯 1完成装配时，LED驱动电源 10的端盖 110A和 110B将封闭管体 30的两端。 在本实施例中 ，可以借助粘合剂（例如灯泥）将端盖 110A和 110B的内表面 与管体 30的外表面粘合在一起，并且与此同时还将基板固定于端盖内。
当 LED日光灯 1完成装配时，基板 120A和 120B与光源板 210可借助图 示的插针和插座固定在一起并由此实现 LED驱动电路模块与 LED单元的电气 连接。 与此同时，在光源板 210上还形成合适的布线（未画出）以在位于不同 基板上的 LED驱动电路模块的第一和第二部分 130A和 130B之间实现电气连 接。 与借助图 3所述的实施例类似，基板 120B上设匱 4个插针，其中两个经 光源板上的布线与基板 120A上的插针 123A和 124A电气连接，另外两个则作 为 LED驱动电路模块 130的输出端与 LED单元 220电气连接。由于视图角度 的原因，图 4中也仅画出其中与插针 123A电气连接的插针 123B。
可选地， LED驱动电源 10的基板与光源模块 20的光源板之间也可以借 助卡槽方式接合。 图 5为图 4所示 LED日光灯的变化形式的分解示意图，其 示出了上述卡槽接合方式。为示意方便起见，光源模块的光源板以及管体的中 间部分未在图 5中示出，但是这并不会影响到对文字内容的理解。如图 5所示， 基板 120A和 120B上分别设匱插槽 125A和 125B，与此同时，光源板 210的 两端分别形成布线 240A和 240B，当光源板 20的两端插入插槽 125A和 125B 内时，一方面可将光源板与基板 110A和 110B固定在一起，另一方面，基板 上的 LED驱动电路模块可与 LED单元电气连接在一起，并且位于不同基板上 的 LED驱动电路模块的第一和第二部分 130A和 130B也可经形成于光源板上 的合适的布线（未画出）电气连接在一起。具体而言，如图 5所示，布线 240B 包含 4个手指状的分支，其中两个经光源板上的布线与布线 240A上的 2个分 支电气连接，另外两个则作为 LED驱动电路模块 130的输出端与 LED单元 220电气连接。
另外可选地 ' LED驱动电源 10的基板与光源模块 20的光源板之间也可 以图 2B所示的过孔形式固定在一起。具体而言，在基板 120A和 120B上形成 过孔，光源板 210的两端则形成与过孔适配的指状突出部分，通过将指状突出 部分焊接在过孔内可以将基板与光源板固定在一起。
在本实施例中 ，管体 30可由玻璃或塑料制成。 为了避免眩光效应，可以 对玻璃构成的管体的内表面和外表面中的至少一个表面作磨砂处理（例如使用 酸溶液使内管表面粗糠化）。 可选地，也可以考虑在管体 30的内表面涂覆光 扩散粉。
图 6为按照本发明另一个实施例的 LED日光灯的分解示意图。
与图 4和 5所示的实施例不同，在本实施例中， LED驱动电源的 LED驱 动电路模块被布匱在一个基板上，因此相应地， LED 驱动电源位于管体的一 端。 为避免费述 '下面着重描述本实施例与前述实施例的不同之处。
按照图 6所示实施例的 LED日光灯 1包括 LED驱动电源 10、 光源模块 20和管体 30。 为示意方便起见，图 6中省略了光源模块的光源板以及管体的 中间部分，但是这并不会影响到对文字内容的理解。
LED驱动电源 10可采用上面借助图 1所示的结构和特征，其被设匱在管 体 30的一端。光源模块 20采用与图 4所示实施例相同的结构和特征，但是也 可以采用图 5所示实施例的结构和特征。
当 LED日光灯 1完成装配时， LED驱动电源 10的端盖 110将封闭管体 30的一端薦板 120与光源板 210可借助图示的卡槽方式固定在一起并由此实 现二者之间的电气连接。
在本实施例中， LED 日光灯 1还包括端盖 410和位于端盖 410内的基板 420。如图 6所示，端盖 410的外表面上设匱一对适于插入日光灯座的插脚 411 和 412，在 LED日光灯 1完成装配时，管体 30的另一端由端盖 410封闭。 例 如可以借助粘合剂（例如灯泥）将端盖 410的内表面与管体 30的外表面粘合 在一起，并且与此同时还将基板 420固定于端盖 410内。基板 420的两个表面 上分别设匱一对引线 421、 422以及卡槽 423。 在本实施例中，插脚 411和 412 也是空心的并且与端盖 410内部空间是连通的，因此引线 421和 422被分别插 入各自对应的插脚 411和 412内并且被插脚的内壁夹持住，从而实现引线与插 脚之间的固定和电气连接。当完成日光灯 1的装配时，基板 420上的插针 423A 和 423B插入光源板 210其中一端的插座 230B内以将光源板 210与基板 420 固定在一起。优选地，引线 421与 422被短接在一起以实现插脚 411和 412之 间的直接相连。
图 7为可应用于上面借助图 1-6所示实施例的一种 LED驱动电路模块的 电路原理图。
图 7所示的 LED驱动电路模块 130包括桥式整流滤波单元 131、 DC-DC 升压变换单元 132A和反愤单元 133，以下对各个单元作进一步的描述。 如图 7所示，桥式整流滤波单元 131包括全桥整流器 BR1、 电容器 Cl、 C2, C3,压敏电阻器 R1和电感器 Ll。交流电（例如市电）经全桥整流器 BR1 整流后在正极端 B1上输出全波脉动电压。 滤波电容器 Cl、 C2、 C3、 压敏电 阻器 R1和电感器 L1构成 EMI滤波电路，其一方面抑制交流电网中的高频干 扰对驱动电路的影响，另一方面抑制驱动电路对交流电网的电磁干扰。
值得指出的是，虽然这里示出的是全波整流方式，但是半波整流也是可用 的。 此外，为了进一步简化电路结构，图 7所示电路的桥式整流滤波单元 131 中的压敏电阻器 Rl、 滤波电容器 C2、 C3和电感器 L1也是可以省略的。
参见图 7，滤波电容器 C1和压敏电阻器 R1并联在全桥整流器 BR1的交 流输入端 B3和 B4之间 ，其中压敏电阻器 R1通过抑制电路中出现的异常过电 压而将全桥整流器 BR1 的输入电压钳制在预定的水平。 滤波电容器 C2、 C3 和电感器 L1组成 π型滤波回路并且电气连接在全桥整流器 BR1的正极端 B1 与负极端 Β2之间 ，以对全桥整流器 BR1输出的脉动电压进行低通滤波。
DC-DC升压变换单元 132A与桥式整流滤波单元 131、 反愤单元 133和 LED负载 LEDl-LEDn (也即图 4-6中设匱在光源板上的多个 LED单元 220 ) 电气连接，其将桥式整流滤波单元 131输出的脉动电压提升至所需的电压和电 流水平并提供给 LED负载。 此外， DC-DC升压变换单元 132A还与反愤单元 133协同工作，以使提供给 LED负载的电流和电压保持恒定并实现功率因子 校正功能。 在典型的应用场合下，多个 LED单元串联后的总电压被设计为超 过电网输入的电压最高值，因此电压的提升是必需的。 以波动范围为 ±10%的 220V交流电为例，其最高电压约为 342V，则 LED串联电压将超过 342V。
在图 7所示的 LED驱动电路模块中 ， DC-DC升压变换单元 132A包括电 感器 L2、 开关二极管 Dl、 电容器 C6和开关调整器 Ul。
优选地，可以采用集成有脉宽调制（ PWM )控制器和金厲氧化物半导体 场效应管（以下又简称为 MOS管）的集成电路芯片作为开关调整器 U1，其中 PWM控制器的输出端与 MOS管的栅极电气连接以实现对 MOS管导通和关断 的控制。 在具体的开关调整器芯片中 ，为了简化占空比的调节，可保持 MOS 管的开关频率为定值（例如大约 1MHz ) ，而 MOS管的关断时间是可调节的； 或者可保持 MOS管的关断时间为定值（例如大约 320ns ) ，而 MOS管的开关 频率是可调节的。 典型地，这类开关调整器芯片一般都配匱与 MOS管的漏极 电气连接的漏极引脚、 与 PWM控制器的控制端电气连接的反愤引脚。上述开 关调整器的例子包括但不局限于中国普芯达电子有限公司生产的 CW12L30和 CW12L40芯片等。
如图 7所示，电感器 L2和开关二极管 D1被串联在桥式整流滤波单元 131 的输出端与 LED负载的正极输入端或 LED驱动电路模块的正极输出端之间， 其中开关二极管 D1的正极与电感器 L2电气连接，负极与 LED负载的正极输 入端电气连接。优选地，可采用速度快、 压降小的肖特基二极管作为开关二极 管 Dl。 继续参见图 7，开关调整器 U1的漏极引脚 D电气连接在电感器 L2与 开关二极管 D1的正极之间 ，并且反债引脚 FB与反饿单元 133电气连接。 此 外，在图 7所示的电路中 ，电容器 C6与 LED负载的正极输入端共接于开关二 极管 D1的负极以在开关二极管 D1截止时向 LED负载放电。
参见图 7，开关调整器 U1还包括电源引脚 VCC和接地引脚 GND，其中 电源引脚 VCC经电容器 C4接地。
反愤单元 133包括晶体三极管 Ql、 电阻器 R2、 R3和电容器 C5。 如图 7 所示，晶体三极管 Q1采用共射极放大电路的连接形式，其中 ，集电极经电阻 器 R3电气连接至开关调整器 U1的反愤引脚以将反愤信号提供至开关调整器 U1，其射极与接地电气连接以作为输入回路和输出回路的共同接地端，并且基 极通过与 LED负载的负极电气连接而接入 LED负载的回路以提取检测信号。 电阻器 R2电气连接在基极与接地之间以构成输入回路。另外，开关调整器 U1 的反愤引脚 FB还经电容器 C5接地。
以下描述图 7所示 LED驱动电路模块 130的工作原理。
当接通交流电源时，桥式整流滤波单元 131将输入的交流电变换为脉动电 压并输出至 DC-DC升压变换单元 132A的电感器 L2。 开关调整器 U1内部的 MOS管在 PWM控制器信号的控制下以很高的频率导通和关断。
当 MOS导通时，在桥式整流滤波单元 331的输出电压的作用下，电流流 经电感器 L2和 MOS管，开关二极管 D1因为电容器 C6上的电压而截止。 随 着流经电感器 L2的电流不断坩大，电感器内存储的能量也不断坩多。 此时， LED负载由电容器 C6供电，其依靠电容器 C6的放电电流工作。
当 MOS管切换至关断状态时，流经电感器 L2的电流开始减小，从而在 电感器 L2的两端诱发感应电动势，其极性为上正右负。 感应电动势与桥式整 流滤波单元 131 的输出电压相叠加后提升了桥式整流滤波单元 131 的输出电 压。 此时，叠加的电压高于电容器 C6上的电压，因此开关二极管 D1进入导 通状态， LED负载改由电感器 L2供电，并且电容器 C6也由电感器 L2充电 并且直至 MOS管再度切换至导通状态。 在本实施例中，感应电动势的大小取 决于 MOS管的占空比，因此可以通过调节 PWM控制器输出信号的占空比获 得所希望的电压提升幅度。
当 MOS管再度被切换回导通状态时，开关二极管 D1处的叠加电压开始 减小并将再次低于电容器 C6上的电压，因此开关二极管 D1进入截止状态， LED负载改由电容器 C6以提升的电压供电，而电感器 L2又开始存储电能。
由上可见，在 PWM控制器的控制下， MOS管在上述导通和关断状态之 间不断切换，从而使 LED负载正极上的电压始终保持在较高的电压水平。
参见图 7， LED负载与电阻器 R4、 R5并联在开关二极管 D1的负极与电 阻器 R2之间 ，并且 LED负载的负极电气连接至晶体三极管 Q1的基极。 当流 经 LED负载的电流和 /或电压发生波动时，流经晶体三极管 Q1的基极的电流 也会改变，经过晶体三极管 Q1放大后的反愤信号从集电极经电阻器 R3输出 至开关调整器 U1的反愤引脚， PWM控制器由此可以根据反愤信号对输出信 号的占空比进行调整，由此使提供给 LED负载的电流和电压保持恒定。
在图 7所示的电路中，开关调整器 U1的反愤引脚 FB还经大容量的电容 器 C5接地，这可以使反愤环路的响应变缓，反愤电平在交流电线路半周期中 接近于恒定。 基本恒定的反愤电平表示在 MOS管中的电流对应于在交流线路 半周期内传送到 LED负载上的平均能量。由于开关调整器 U1在固定频率上工 作，在 MOS管导通时间结束之前，电流的坩加不会超出一定的范围。 通过在 输入的交流电压坩加时减少流经 MOS管的开关电流，并且在输入的交流电压 减少时坩加流经 MOS管的开关电流，使 LED负载输入端的纹波最小化，并 且交流输入电流能时刻跟踪交流输入电压的变化，从而实现功率因子校正的功 能。
需要指出的是，在图 7所示的电路中 ， PWM控制器与 MOS管被集成在 同一集成电路芯片中 ，为了进一步提高集成度，还可以考虑将晶体三极管 Ql、 PWM控制器和 MOS管三者集成在同一集成电路芯片中。
可选地， PWM控制器和 MOS管也可以以分立的电路元件的形式被提供 于 LED驱动电路模块中。图 8所示的 LED驱动电路模块示出了这种形式的一 个例子，其中与图 7中相同或相似的单元采用相同的标号表示。
图 8所示的驱动电路模块 130同样包括桥式整流滤波单元 131、 DC-DC升 压变换单元 132A和反愤单元 133。 桥式整流滤波单元 131和反饿单元 133采 用与图 7所示相同的形式和结构，此处不再赘述。
参见图 8， DC-DC升压变换单元 132A包括电感器 L2、 开关二极管 Dl、 电容器 C6、 PWM控制器 U2和 MOS管 T，其中 ，电感器 L2和开关二极管 D1被串联在桥式整流滤波单元 131的输出端与 LED负载的正极输入端或 LED 驱动模块的正极输出端之间 ，开关二极管 D1的正极与电感器 L2电气连接， 负极与 LED负载电气连接。 在本实施例中， MOS管 T的漏极 D电气连接在 电感器 L2与开关二极管 D1的正极之间，源极 S电气连接至接地，栅极 G与 PWM控制器 U2的输出端 P相连。 PWM控制器 U2—般以集成电路芯片的形 式提供，其控制端 FB与反愤单元 333电气连接。 如图 8所示，电容器 C6被 电气连接在开关二极管 D1的负极与 LED负载之间以在开关二极管 D1截止时 向 LED负载放电。
反饿单元 133同样包括晶体三极管 Ql、 电阻器 R2、 R3和电容器 C5。 晶 体三极管 Q1采用共射极放大电路的连接形式，其中，集电极经电阻器 R3电 气连接至 PWM控制器 U2的控制端 FB以将反愤信号提供给 PWM控制器 U2， 其射极与接地电气连接以作为输入回路和输出回路的共同接地端，并且基极接 入 LED负载的回路以提取检测信号。 PWM控制器的控制端 FB还经电容器 C5接地。
图 8所示 LED驱动电路模块的工作原理与图 7所示的相似，因此此处不 再赘述。
图 9为可应用于上面借助图 1-6所示实施例的另一种 LED驱动电路模块 的电路原理图。
图 9所示的 LED驱动电路模块 130包括桥式整流滤波单元 131、 DC-DC 降压变换单元 132B和反饿单元 133，以下对各个单元作进一步的描述。 如图 9所示，桥式整流滤波单元 131包括全桥整流器 BR1、 电容器 C2、 C3, 压敏电阻器 R1和电感器 Ll。 交流电（例如市电）经全桥整流器 BR1整 流后在正极端 B1上输出全波脉动电压。 滤波电容器 C2、 C3、 压敏电阻器 Rl 和电感器 L1构成 EMI滤波电路，其一方面抑制交流电网中的高频干扰对驱动 电路的影响，另一方面抑制驱动电路对交流电网的电磁干扰。
参见图 9，压敏电阻器 R1并联在全桥整流器 BR1的交流输入端 B3和 B4 之间 ，其中压敏电阻器 R1通过抑制电路中出现的异常过电压而将全桥整流器 BR1的输入电压钳制在预定的水平。 滤波电容器 C2、 C3和电感器 L1组成 π 型滤波回路并且电气连接在全桥整流器 BR1的正极端 B1与接地的负极端 Β2 之间，以对全桥整流器 BR1输出的脉动电压进行低通滤波。
值得指出的是，虽然这里示出的是全波整流方式，但是半波整流也是可用 的。 此外，为了进一步简化电路结构，图 9所示电路的桥式整流滤波单元 131 中的压敏电阻器 Rl、 滤波电容器 C2、 C3和电感器 L1也是可以省略的。
DC-DC降压变换单元 132B与桥式整流滤波单元 131、 反愤单元 133和 LED负载 LEDl-LEDn (例如图 4-6中光源板 210上设匱的 LED单元 220 )电 气连接，其将桥式整流滤波单元 131输出的脉动电压降低至所需的电压和电流 水平并提供给 LED负载。此外，DC-DC降压变换单元 132B还与反愤单元 133 协同工作，以使提供给 LED负载的电流和电压保持恒定。
在图 9所示的 LED驱动电路模块中， DC-DC降压变换单元 132B包括电 感器 L2、 开关二极管 Dl、 电容器 C，、 MOS管 T和脉宽调制（ PWM )控制 器 U3。
PWM控制器 U3的输出端 P与 MOS管 T的栅极 G电气连接以实现对 MOS 管导通和关断的控制。 上述 PWM控制器的例子包括但不局限于美国 Supertex股份有限公司生产的 HV9910型 LED驱动器芯片等。
如图 9所示，开关二极管 D1的负极和 LED负载的正极 LED+或 LED驱 动电路模块的正极输出端共同连接至桥式整流滤波单元 131的输出端，开关二 极管 D1的正极则与 MOS管 T的漏极 D电气连接。 优选地，可采用速度快、 压降小的肖特基二极管作为开关二极管 Dl。 电感器 L2电气连接在 LED负载 的负极 LED-与 MOS管 T的漏极 D之间。继续参见图 9，PWM控制器 U3还 包含反愤引脚 FB，其与反愤单元 133电气连接。此外，在图 9所示的电路中 ， 电容器 C7并联在 LED负载的正极 LED+与负极 LED-之 |¾(也即 LED驱动电 路模块的正极输出端与负极输出端之间 μ乂平滑提供给 LED负载的工作电压。 可以根据允许的工作电压的纹波值来选择电容器 C7的电容值。
参见图 9， PWM控制器 U3还包括电源引脚 VCC和接地引脚 GND，其 中电源引脚 VCC经电容器 C4接地。
反饿单元 133包括电阻器 R6。如图 9所示，电阻器 R6被电气连接在 MOS 管 T的源极 S与接地之间。另一方面，电阻器 R6的电气连接至源极 S的一端 还电气连接至 PWM控制器 U3的反愤引脚 FB以将反愤信号提供给 PWM控 制器 U3。 以下描述图 9所示 LED驱动电路模块 130的工作原理。
当接通交流电源时，桥式整流滤波单元 131将输入的交流电变换为脉动电 压并输出至 DC-DC降压变换单元 132B。 此时在 PWM控制器 U3的控制下， MOS管 T在上述导通和关断状态之间不断切换，从而使 LED负载两端上的电 压始终保持在一定的电压水平。
具体而言，当 MOS管 T导通时 '开关二极管 D1处于截止状态。 桥式整 流滤波单元 131的输出电流从 LED负载的正极 LED+流入并从负极 LED-流至 电感器 L2。流经电感器 L2的电流将不断坩大直到 MOS管 T关断。随着流经 电感器 L2的电流不断坩大，电感器内存储的能量也不断坩多。
当 MOS管 T切换至关断状态时，流经电感器 L2的电流开始减小，从而 在电感器 L2的两端诱发感应电动势，其极性为左正右负。 感应电动势与桥式 整流滤波单元 131的输出电压相叠加后高于电容器 C7上的电压，因此开关二 极管 D1进入导通状态，从而为电感器 L2的电流提供续流通路直至 MOS管 T 再度切换至导通状态。在图 9所示的电路结构中 ，可以通过调节 PWM控制器 输出信号的占空比获得所希望的电压降低幅度。
参见图 9，电阻器 R6电气连接在 MOS管 T的源极 S与接地之间。 由于 电阻器 R6两端的电压对应于流经 MOS管 T和电感器 L2的电流，因此该电 压可被施加于 PWM控制器 U3的反饿引脚 FB作为反愤信号。 具体而言，当 MOS管 T导通后，电感器 L2的电流不断坩大，当电阻器 R6两端的电压超过 预设的峰值电流检测阈值时，将触发 PWM控制器 U3在引脚 P上输出关断 MOS管 T的控制信号，由此可以通过控制 MOS管 T的峰值电流来实现恒流 控制。 显然，达到峰值电流所花费的时间与电感器 L2的电感值有关，电感值 越大则电流上升速度越慢，到达峰值电流所用的时间越长，反之亦然。
需要指出的是，由于电容器 C7如图 9所示并联在 LED负载之间 ，所以可 以平滑电流的脉动起伏，使得流经 LED负载的电流更为恒定。
可选地， PWM控制器 U3和 MOS管 T可以以集成在同一集成电路芯片 的形式提供于 LED驱动电路模块中。 图 10所示的 LED驱动电路模块示出了 这种形式的一个例子，其中与图 9中相同或相似的单元采用相同的标号表示。
图 10所示的 LED驱动电路 130同样包括桥式整流滤波单元 131、 DC-DC 降压变换单元 132B和反愤单元 133。 桥式整流滤波单元 131和反饿单元 133 采用与图 9所示相同的形式和结构，此处不再赘述。
DC-DC降压变换单元 132B与桥式整流滤波单元 131、 反愤单元 133和 LED负载 LEDl-LEDn电气连接，其将桥式整流滤波单元 131输出的脉动电压 降低至所需的电压和电流水平并提供给 LED负载。此外， DC-DC降压变换单 元 132B还与反愤单元 133协同工作，以使提供给 LED负载的电流和电压保持 恒定。
在图 10所示的 LED驱动电路中，DC-DC降压变换单元 132B包括电感器 L2、 开关二极管 Dl、 电容器 C7和开关调整器 U4。
优选地，可以采用集成有脉宽调制（ PWM )控制器和 MOS管的集成电路 芯片作为开关调整器 U4，其中 PWM控制器的输出端与 MOS管的栅极电气连 接以实现对 MOS管导通和关断的控制。 典型地，这类开关调整器芯片一般都 配匱与 MOS管的漏极电气连接的漏极引脚和与 MOS管的源极电气连接的源 极引脚，并且优选地，源极引脚与 PWM控制器的控制端电气连接以将与流经 MOS管的电流对应的检测信号反愤至 PWM控制器。 上述开关调整器的例子 包括但不局限于荷兰恩智浦半导体公司生产的 SSL2108X型 LED照明驱动器 芯片等。
如图 10所示，开关二极管 D1的负极和 LED负载的正极 LED+共同连接 至桥式整流滤波单元 131的输出端，开关二极管 D1的正极则与开关调整器 U4 的漏极引脚 D电气连接。电感器 L2电气连接在 LED负载的负极 LED-与开关 调整器 U4的漏极引脚 D之间。 继续参见图 10，开关调整器 U4还包含源极引 脚 S，其在芯片内部与 PWM控制器的控制端电气连接而在芯片外部与反愤单 元 433电气连接。 此外，在图 10所示的电路中，电容器 C7并联在 LED负载 的正极 LED+与负极 LED-之间以平滑提供给 LED负载的工作电压。
参见图 10，开关调整器 U4包括电源引脚 VCC和接地引脚 GND，其中电 源引脚 VCC经电容器 C4接地。
反饿单元 133包括被电气连接在开关调整器 U4的源极 S与接地之间的电 阻器 R6。 如在描述图 9所示的 LED驱动电路模块时所指出的，电阻器 R6两 端的电压对应于流经 MOS管和电感器 L2的电流，其被作为反愤信号施加于 开关调整器 U4的源极 S以使开关调整器 U4内部的 PWM控制器通过控制 MOS管的峰值电流来实现恒流控制。 图 10所示 LED驱动电路的工作原理与 图 9所示的相似，因此此处不再赘述。
可选地，在上述图 7-10所示的 LED驱动电路模块中还可以集成实现其它 功能的电路，例如调光控制电路、 传感电路、 智能照明控制电路、 通信电路和 保护电路等。 这些电路可以与驱动控制器集成在同一半导体晶片或封装芯片 内，或者这些电路可以单独地以半导体晶片或封装芯片的形式提供，或者这些 电路中的一些或全部可以组合在一起并以半导体晶片或封装芯片的形式提供。
图 11为可应用于上面借助图 1-6所示实施例的另一种 LED驱动电路模块 的电路原理图。
图 11所示的 LED驱动电路模块 130包括桥式整流滤波单元 131和恒流控 制单元 134，以下对各个单元作进一步的描述。
如图 11所示，桥式整流滤波单元 131包括全桥整流器 BR1、 滤波电容器 C1和压敏电阻器 Rl。 交流电（例如市电）经全桥整流器 BR1整流后在桥式 整流滤波单元或全桥整流器 BR1的正极输出端 B1上输出全波脉动电压。压敏 电阻器 R1并联在桥式整流滤波单元或全桥整流器 BR1的交流输入端 B3和 B4 之间 ，其通过抑制电路中出现的异常过电压而将全桥整流器 BR1 的输入电压 钳制在预定的水平。 滤波电容器 C1电气连接在桥式整流滤波单元或全桥整流 器 BR1的正极输出端 B1与负极输出端 B2之间 ，以对全桥整流器 BR1输出的 脉动电压进行低通滤波，这里的负极输出端 B2被接地。 值得指出的是，虽然这里示出的是全波整流方式，但是半波整流也是可用 的。此外，为了进一步简化电路结构，图 11所示电路的桥式整流滤波单元 131 中的压敏电阻器 R和滤波电容器 C1也是可以省略的。
恒流控制单元 134包括基准电压电路 1341、 放大器 1342、 MOS管 T、 第 一电阻器 R7和第二电阻器 R8。 参见图 11， LED负载 LEDl-LEDn (例如图 4-6中光源板 210上设匱的 LED单元 220 )连接在桥式滤波单元 131与恒流控 制单元 134之间，其中， LED负载 LEDl-LEDn的正极 LED+与正极输出端 B1电气连接并且其负极 LED-与 MOS管 T的源极 S电气连接，而 MOS管 T 的漏极 D经第一电阻器 R7接地，由此形成电流回路。 MOS管 T的栅极 G与 放大器 1342的输出端电气连接，并且漏极 D除了与第一电阻器 R7电气相连 之外还电气连接至放大器 1342的第一输入端（例如反相输入端- ) ，从而将第 一电阻器 R7两端的采样信号 VR1施加在该墉入端上。另一方面，基准电压电 路 与放大器 I342的第二输入端（例如正相输入端 + )电气连接以将基准 电压 Vref施加在该输入端。如图 11所示，在 MOS管 T的源极 S与漏极 D之 间还电气连接有第二电阻器 R8。
优选地，可以将基准电压电路、 放大器和 MOS管集成在同一集成电路芯 片中。这种集成电路芯片的例子包括但不局限于上海普芯达电子有限公司生产 的 CW11L01芯片等。
在图 11所示的 LED驱动电路模块中， MOS管 T本身具有一定的内阻， 因此连接在 MOS管 T的源极 S与漏极 D之间的第二电阻器 R8相当于在 MOS 管 T的内阻上并联了一个电阻，这使得流经 LED负载 LEDl-LEDn的电流并 未全部流入 MOS管 T，而是一部分被分流至第二电阻器 R8，由此可以减少 MOS管的发热量，或者可以在采用相同电气参数的 MOS管的情况下提高 LED 负载的工作电流。
以下描述恒流控制单元 134的工作原理。
参见图 1 加在放大器 1342两个输入端上的信号的差值经放大后在 MOS 管 T的栅极 G上形成栅极电压信号以控制 MOS管 T ¾导通和关断，从而使 流经 LED 负载 LEDl-LEDn 的电流恒定。 具体而言， 当流经 LED 负载 LEDl-LEDn的电流使得第一电阻器 R7两端的采样信号 VR1大于基准电压 时，放大器 1342将在栅极 G上施加低电平信号以关断 MOS管 T，此时电流 回路的电阻值较大，从而使得流经 LED负载 LEDl-LEDn的电流减小；反之， 当流经 LED负载 LEDl-LEDn的电流使得第一电阻器 R7两端的采样信号 VR1 小于基准电压 时 J¾大器 1342将在栅极 G上施加高电平信号以导通 MOS 管 T，此时电流回路的电阻值较小，从而使得流经 LED负载 LEDl-LEDn的 电流坩大。 流经 LED负载 LEDl-LEDn的电流由此将基本保持恒定。 虽然已经展现和讨论了本发明的一些方面，但是本领域内的技术人 应该 意识到：可以在不背离本发明原理和精神的条件下对上述方面进行改变，因此 本发明的范围将由权利要求以及等同的内容所限定。

Claims

权 利 要 求
1、 一种 LED日光灯驱动电源，包括：
端盖，其外表面上设匱一对插脚，该对插脚是空心的并且与所述端盖内部 连通；
位于所述端盖内的基板，所述基板的其中一个表面上设匱一对引线，每个 引线插入各自对应的插脚内并且固定于插脚的内壁；
设匱在所述基板上的 LED驱动电路模块，其与所述引线电气连接。
2、 一种 LED日光灯驱动电源，其特征在于，包括：
一对端盖，每个所述端盖的外表面设匱一对插脚，该对插脚是空心的并且 与该端盖内部连通；
一对基板，其分别位于各自对应的端盖内，每个所述基板的其中一个表面 上设匱一对引线，每个引线插入各自对应的端盖的插脚内并固定于插脚的内 壁；以及
LED 驱动电路模块，其设匱在所述一对基板上并且与引线电气连接。
3、 如权利要求 1或 2所述的 LED日光灯驱动电源，其中 ，所述基板进一 步包括插针或插槽，其设匱在与基板的所述其中一个表面相对的另一表面上并 且与所述 LED驱动电路模块电气连接。
4、 如权利要求 1或 2所述的 LED日光灯驱动电源，其中 ，所述插脚的内 壁向内收縮以将其内的引线夹持住。
5、 如权利要求 1或 2所述的 LED日光灯驱动电源，其中，所述 LED驱 动电路模块包含：
桥式整流滤波单元；
DC-DC升压变换单元，包括电感器、 开关二极管、 PWM控制器和 MOS 管，其中 ，所述电感器和开关二极管串联在所述桥式整流滤波单元的输出端与 所述 LED驱动电路模块的正极输出端之间 ，所述 MOS管的漏极电气连接在 所述电感器与开关二极管的正极之间 ，栅极与所述 PWM控制器的输出端电 气连接；以及
反愤单元，包括晶体三极管，其基极电气连接至所述 LED驱动电路模块 的负极输出端，集电极电气连接至所述 PWM控制器的控制端。
6、 如权利要求 5所述的 LED日光灯驱动电源，其中 ，所述 DC/DC升压 变换单元还包含电气连接在所述 PWM控制器的控制端与接地之间的电容器。
7、 如权利要求 1所述的 LED日光灯驱动电源，其中 ，所述 LED驱动电 路模块包含：
桥式整流滤波单元；
DC-DC降压变换单元，包括电感器、 开关二极管、 PWM控制器和 MOS 管，其中，所述开关二极管的负极和所述 LED驱动电路模块的正极输出端共 接于所述桥式整流滤波单元的输出端，所述 MOS管的漏极与所述开关二极管 的正极电气连接，栅极与所述 PWM控制器的输出端电气连接，并且所述电感 器电气连接在所述 MOS管的漏极与所述 LED驱动电路模块的负极输出端之 间；以及
反愤单元，包括电阻器，其与所述 PWM控制器的控制端共接于所述 MOS 管的源极。
8、 如权利要求 1所述的 LED日光灯驱动电源，其中 ，所述 LED驱动电 路模块包含桥式整流滤波单元和恒流控制单元，其中 ，所述恒流控制单元包括 放大器、 MOS管、 第一电阻器，所述桥式整流滤波单元的正极输出端与所述 LED驱动电路模块的正极输出端连接，所述 MOS管的源极与所述 LED驱动 电路模块的负极输出端电气连接，所述 MOS管的漏极与所述放大器的第一输 入端电气连接并且经所述第一电阻器接地，所述放大器的输出端与所述 MOS 管的栅极电气连接以根据所述漏极上的电压与所述放大器器的第二输入端上 的基准电压的比较结果来控制所述 MOS管的导通和关断。
9、 如权利要求 8所述的 LED日光灯驱动电源，其中，所述恒流控制单元 进一步包括第二电阻器，其电气连接在所述 MOS管的源极与漏极之间。
10、 一种 LED日光灯，包括：
管体；
位于所述管体内部的光源板，其上设匱多个 LED单元；
封闭所述管体两端的一对端盖，每个所述端盖的外表面上设匱一对插脚， 该对插脚是空心的并且与该端盖内部连通；
一对基板，其分别位于各自对应的端盖内并且与所述光源板固定在一起， 每个所述基板的其中一个表面上都设匱一对引线，每个引线插入各自对应的端 盖的插脚内并固定于插脚的内壁；以及
LED 驱动电路模块，其设匱在所述一对基板上并且与其中一个基板上的 引线电气连接。
PCT/CN2014/078587 2013-06-09 2014-05-28 Led日光灯驱动电源和led日光灯 WO2014198182A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14811685.8A EP3009740A4 (en) 2013-06-09 2014-05-28 Led fluorescent lamp driving power source and led fluorescent lamp
US14/896,959 US9970640B2 (en) 2013-06-09 2014-05-28 LED fluorescent lamp driving power source and LED fluorescent lamp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310230836.6 2013-06-09
CN201310230836.6A CN104235785A (zh) 2013-06-09 2013-06-09 Led日光灯驱动电源和led日光灯

Publications (1)

Publication Number Publication Date
WO2014198182A1 true WO2014198182A1 (zh) 2014-12-18

Family

ID=52021641

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/078587 WO2014198182A1 (zh) 2013-06-09 2014-05-28 Led日光灯驱动电源和led日光灯

Country Status (4)

Country Link
US (1) US9970640B2 (zh)
EP (1) EP3009740A4 (zh)
CN (1) CN104235785A (zh)
WO (1) WO2014198182A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016203405A1 (de) * 2016-03-02 2017-09-07 Ledvance Gmbh Halbleiterlampe

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11131431B2 (en) 2014-09-28 2021-09-28 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
US10021742B2 (en) * 2014-09-28 2018-07-10 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
US11480305B2 (en) 2014-09-25 2022-10-25 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp
US12104754B2 (en) 2014-09-28 2024-10-01 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp and a power supply module thereof
CN205961494U (zh) 2014-09-28 2017-02-15 嘉兴山蒲照明电器有限公司 Led直管灯
US10560989B2 (en) * 2014-09-28 2020-02-11 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
US10502372B2 (en) 2015-03-10 2019-12-10 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
US10514134B2 (en) 2014-12-05 2019-12-24 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp
TWM498275U (zh) * 2014-12-17 2015-04-01 Formosa Optronics Co Ltd Ｌｅｄ燈管結構
CN104613340A (zh) * 2014-12-23 2015-05-13 龙岩金太阳光电科技有限公司 全周光led日光灯
US11754232B2 (en) 2015-03-10 2023-09-12 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED lamp and power source module thereof related applications
US9897265B2 (en) 2015-03-10 2018-02-20 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp having LED light strip
US11028973B2 (en) 2015-03-10 2021-06-08 Jiaxing Super Lighting Electric Appliance Co., Ltd. Led tube lamp
US11519565B2 (en) 2015-03-10 2022-12-06 Jiaxing Super Lighting Electric Appliance Co., Ltd LED lamp and its power source module
CN204704657U (zh) * 2015-06-30 2015-10-14 浙江上光照明有限公司 一体化led节能灯
US11035526B2 (en) 2015-12-09 2021-06-15 Jiaxing Super Lighting Electric Appliance Co., Ltd. LED tube lamp
CN106332361B (zh) * 2016-09-20 2017-10-03 浙江阳光美加照明有限公司 一种无频闪led灯丝灯
CN108240611A (zh) * 2016-12-27 2018-07-03 苏州欧普照明有限公司 一种灯具
DE102017116949B4 (de) 2017-07-26 2023-03-16 Ledvance Gmbh Lampensockel mit Leuchtmitteltreiber
CN108488642B (zh) * 2018-05-25 2024-08-27 深圳市明微电子股份有限公司 一种发光二极管照明装置和发光二极管单元
CN109152144B (zh) * 2018-09-28 2020-07-14 帝奥微电子有限公司 适用于极低triac调光深度的led电流纹波消除电路
CN210860701U (zh) * 2019-12-25 2020-06-26 厦门普为光电科技有限公司 Led灯管内置驱动电源结构
CN113175635A (zh) * 2021-04-21 2021-07-27 深圳市派乐光电技术有限公司 一种绿色节能环保的高光效照明灯结构
US11920743B2 (en) 2021-12-01 2024-03-05 Jiaxing Super Lighting Electric Appliance Co., Ltd LED tube lamp

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2819464Y (zh) * 2006-03-14 2006-09-20 徐学洪 适用于普通荧光灯灯座的套管式荧光灯装置
CN201187693Y (zh) * 2008-04-29 2009-01-28 张瑞铉 Led灯管结构
US20090296381A1 (en) * 2008-06-01 2009-12-03 Jack Dubord Adjustable modular lighting system and method of using same
CN101873736A (zh) * 2009-04-24 2010-10-27 辉芒微电子（深圳）有限公司 一种led驱动电路
JP2012084451A (ja) * 2010-10-13 2012-04-26 Toshihiro Yoshida 直管ｌｅｄ蛍光灯ｌｅｄ曲基板
CN102843838A (zh) * 2012-08-31 2012-12-26 上海遍发电子科技有限公司 一种多路led均流电路以及led灯

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6794811B2 (en) 2002-02-15 2004-09-21 Osram Sylvania Inc. Fluorescent lamp and method for attaching a base member to an end of same
US7490957B2 (en) 2002-11-19 2009-02-17 Denovo Lighting, L.L.C. Power controls with photosensor for tube mounted LEDs with ballast
SE0302595D0 (sv) * 2003-09-30 2003-09-30 Auralight Int Ab Lysrör anpassat för kalla utrymmen
CN2906322Y (zh) 2006-02-13 2007-05-30 北京倍节加能科技有限公司 一种荧光灯用节能转接头
CN201066084Y (zh) * 2007-08-03 2008-05-28 李洪昌 节能日光灯
US8466619B2 (en) * 2008-11-11 2013-06-18 Dongbu Hitek Co., Ltd. Illumination apparatus and driving method thereof
TWI390152B (zh) * 2009-02-12 2013-03-21 Separate light emitting diode lamp
US8025533B2 (en) 2009-11-13 2011-09-27 Smk Corporation LED illumination apparatus
CN101778506B (zh) * 2009-12-28 2013-07-03 英飞特电子（杭州）股份有限公司 一种实现多路led精确恒流的驱动电路
CN201680317U (zh) * 2009-12-31 2010-12-22 重庆四联启蓝半导体照明有限公司 灯头插接的led日光灯
JP4902818B1 (ja) 2010-02-23 2012-03-21 パナソニック株式会社 光源装置
CN201739858U (zh) * 2010-07-30 2011-02-09 杭州华奕兴电子机械有限公司 Led日光灯
WO2012058556A2 (en) * 2010-10-29 2012-05-03 Altair Engineering, Inc. Mechanisms for reducing risk of shock during installation of light tube
US20120249012A1 (en) * 2011-03-30 2012-10-04 Gre Alpha Electronics Ltd. Method and system for supplying multiple led drivers using the same traic dimmer
TWM427748U (en) 2011-11-22 2012-04-21 Verticil Electronics Corp Driving circuit structure for LED fluorescent tube

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2819464Y (zh) * 2006-03-14 2006-09-20 徐学洪 适用于普通荧光灯灯座的套管式荧光灯装置
CN201187693Y (zh) * 2008-04-29 2009-01-28 张瑞铉 Led灯管结构
US20090296381A1 (en) * 2008-06-01 2009-12-03 Jack Dubord Adjustable modular lighting system and method of using same
CN101873736A (zh) * 2009-04-24 2010-10-27 辉芒微电子（深圳）有限公司 一种led驱动电路
JP2012084451A (ja) * 2010-10-13 2012-04-26 Toshihiro Yoshida 直管ｌｅｄ蛍光灯ｌｅｄ曲基板
CN102843838A (zh) * 2012-08-31 2012-12-26 上海遍发电子科技有限公司 一种多路led均流电路以及led灯

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016203405A1 (de) * 2016-03-02 2017-09-07 Ledvance Gmbh Halbleiterlampe
US9879831B2 (en) 2016-03-02 2018-01-30 Ledvance Gmbh Semiconductor lamp with tubular contact pins

Also Published As

Publication number Publication date
EP3009740A4 (en) 2017-06-07
US20160186969A1 (en) 2016-06-30
EP3009740A1 (en) 2016-04-20
CN104235785A (zh) 2014-12-24
US9970640B2 (en) 2018-05-15

Similar Documents

Publication Publication Date Title
WO2014198182A1 (zh) Led日光灯驱动电源和led日光灯
US9788371B2 (en) Lamp cap integrated with LED drive power supply
US9820341B2 (en) LED tube lamp having mode switching circuit and auxiliary power module
US9357604B2 (en) Light engine with LED switching array
US9844107B2 (en) High efficiency driver circuitry for a solid state lighting fixture
US10571081B2 (en) LED tube lamp and driving method therefor
JP4370901B2 (ja) Ｌｅｄ点灯装置
US8415889B2 (en) LED lighting equipment
US10271390B2 (en) Solid-state lighting fixture with compound semiconductor driver circuitry
CN101730340B (zh) 发光二极管点灯装置
CN103899939A (zh) Led日光灯及其安装方法
CN104019378A (zh) Led灯芯及包含其的led日光灯
CN103982782A (zh) Led日光灯及其装配方法
US10612731B2 (en) LED tube lamp
CN104349552B (zh) 电子镇流器以及具有该电子镇流器的照明设备
EP2528417A2 (en) Light source driving device
TWI656809B (zh) 發光二極體驅動電路及其照明裝置
TW200926892A (en) Driving circuit and method for reducing operation temperature of LED
CN103857138B (zh) 集成光源的led驱动电源和led日光灯
CN212435995U (zh) Led驱动电路
CN103476165B (zh) 具局部开关控制的光源供应模块
CN203757402U (zh) 一种具有白炽灯调光效果的led球泡灯
CN116847504A (zh) 一种开关型去频闪电路
CN110769542A (zh) 一种线性恒流驱动的led球泡灯
CN105407576A (zh) 一种led驱动电路

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14811685

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2014811685

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 14896959

Country of ref document: US