• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An LED driver circuit with stepwise adjustable power and an LED lighting tube. The LED driver circuit comprises a constant current IC chip U1, a power supply unit connecting to the constant current IC chip U1, a switch control unit and a driving unit. The driving unit connects to the switch control unit. The LED driver circuit also comprises a power regulation unit. The power regulation unit connects to the constant current IC chip U1, the switch control unit and the driving unit. The present invention uses 12W, 15W, 18W (or) more stepwise adjustable power. It is applicable to LED lighting tubes, ceiling lights, panel lights and all types of LED stepwise adjustable power.
    公开号:NL2015840A
    申请号:NL2015840
    申请日:2015-11-23
    公开日:2017-02-02
    发明作者:Cai Haibin；Ling Wenhong
    申请人:Huizhou Xindi Energy Saving And Env Prot Tech Co Ltd；
    IPC主号:
    专利说明:

    Title: LED driver circuit with stepwise adjustable power and LED lighting tube BACKGROUND OF THE INVENTION
    The present invention relates to LED lighting apparatus and particularly relates to an LED driver circuit with stepwise adjustable power and an LED lighting tube. LED lighting tube is commonly known as light tube or fluorescent tube. Its light source adopts LED as illuminant. Traditional fluorescent tube is also called fluorescent light. The light is provided with a filament on both ends. The light tube is filled with a small amount of argon and mercury vapor. Fluorescent powder is coated on the inner wall of the light tube. Gases between the two filaments emit ultraviolet light when they are conductive, causing the fluorescent powder to emit visible light. LED lighting tube has many advantages. It is commonly used for general lighting and indoor lighting in offices, malls, restaurants, schools, homes, factories and so forth.
    An LED lighting tube usually comprises a light cover, LED beads, aluminum substrate, power supply and so forth. At present, there have been LED lighting tubes with SCR dimming, remote controlled dimming and adjustable power. However, since the said LED lighting tubes are additionally provided with dimming circuits, loss also increases, thus reducing power conversion efficiency. Since power conversion efficiency decreases, lumen of the whole LED lighting tubes also decreases. The cost is higher and it is not beneficial for energy-saving and environmental protection.
    BRIEF SUMMARY OF THE INVENTION
    An object of the present invention is to provide an LED driver circuit with stepwise adjustable power. It uses 12W, 15W, 18W (or) more stepwise adjustable power. It is applicable to LED lighting tubes, ceiling lights, panel lights and all types of LED stepwise adjustable power. It can guarantee power conversion efficiency and achieve adjustment of the power of the LED lighting tube as well as selection of an appropriate power, thereby effectively providing the benefits of energy-saving and environmental friendliness to consumers.
    To achieve the aforementioned object, the present invention adopts the following technical proposal:
    An LED driver circuit with stepwise adjustable power, comprising a constant current IC chip U1, a power supply unit connecting to the constant current IC chip U1, a switch control unit and a driving unit. The driving unit connects to the switch control unit. The LED driver circuit also comprises a power regulation unit. The power regulation unit connects to the constant current 1C chip U1, the switch control unit and the driving unit.
    Furthermore, in the LED driver circuit with stepwise adjustable power described above, the power supply unit comprises a 300V voltage input, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a diode D1, a capacitor C5 and a resistor R10. An internal multiplier input pin MULT of the constant current IC chip U1 connects to the 300V voltage input via the resistor R4 and the resistor R5. A zero current detection pin ZCD of the constant current IC chip U1 is grounded via the resistor R10. The capacitor C5 is connected in parallel with two ends of the resistor R10. The diode D1 has a positive pole which is grounded and a negative pole which connects to the zero current detection pin ZCD of the constant current IC chip U1.
    Furthermore, in the LED driver circuit with stepwise adjustable power described above, each of the resistor R3 and the capacitor C1 has one end which connects to the internal multiplier input pin MULT of the constant current IC chip U1 and another end which is grounded.
    Furthermore, in the LED driver circuit with stepwise adjustable power described above, the switch control unit comprises a field effect transistor Q1, a diode D3, a resistor R15, a resistor R16, a resistor R11, a capacitor C8 and a capacitor C10. A grid electrode of the field effect transistor Q1 connects to a grid electrode drive pin GATE of the constant current IC chip U1 via the resistor R15. A drain electrode of the field effect transistor Q1 connects to the 300V voltage input via the diode D3 and the resistor R11. A source electrode of the field effect transistor Q1 connects to a current detection pin CS of the constant current IC chip U1 via the resistor R16.
    Furthermore, in the LED driver circuit with stepwise adjustable power described above, the capacitor C8 is connected in parallel with two ends of the resistor R11, and the capacitor C10 is connected between the drain electrode and the source electrode of the field effect transistor Q1.
    Furthermore, in the LED driver circuit with stepwise adjustable power described above, the driving unit comprises a transformer T2, a diode D4, a capacitor C14, a resistor R14 and a capacitor C11. A first primary coil of the transformer T2 has one end which connects to the 300V voltage input and another end which connects to the drain electrode of the field effect transistor Q1. A second primary coil of the transformer T2 has one end which connects to the zero current detection pin ZCD of the constant current IC chip U1 and another end which is grounded; A secondary coil of the transformer T2 has one end which connects to a positive pole of an LED load via the resistor R14 and the capacitor C11 and another end which connects to a negative pole of the LED load.
    Furthermore, in the LED driver circuit with stepwise adjustable power described above, the diode D4 has a positive pole which connects to one end of the secondary coil of the transformer T2 and a negative pole which connects to one end of the capacitor C14. Another end of the capacitor C14 connects to the negative pole of the LED load.
    Furthermore, in the LED driver circuit with stepwise adjustable power described above, the power regulation unit comprises a plurality of switch groups connected in parallel. Each of the switch groups comprises a switch and a resistor connected in series. Each of the switch groups has one end which is grounded and another end which connects to the current detection pin CS of the constant current IC chip U1 via the resistor R16.
    Furthermore, in the LED driver circuit with stepwise adjustable power described above, there are three switch groups.
    Moreover, the present invention also provides an LED lighting tube. The LED lighting tube comprises a light cover, a power supply provided in the light cover, a circuit board provided with the LED driver circuit with stepwise adjustable power described above and an LED load connected to the LED driver circuit with stepwise adjustable power. The light cover is provided with a power regulating switch. The power regulating switch connects to the LED driver circuit with stepwise adjustable power.
    The LED driver circuit with stepwise adjustable power and LED lighting tube of the present invention can guarantee power conversion efficiency and achieve adjustment of the power of the LED lighting tube. It effectively brings down the cost of LED lighting tube and is beneficial for energy-saving and environmental protection.
    BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of the LED driver circuit with stepwise adjustable power of the present invention. FIG. 2 is a detailed circuit diagram of the LED driver circuit with stepwise adjustable power of the present invention. FIG. 3 is a perspective view of the LED lighting tube of the present invention. FIG. 4 is a sectional view of the LED lighting tube of the present invention.
    DETAILED DESCRIPTION OF THE INVENTION
    For a better understanding of the present invention, the present invention is further described in detail below with reference to the accompanying drawings. The drawings depict preferred embodiments of the present invention. However, the present invention can be realized in many different forms which are not limited to the embodiments illustrated herein. On the contrary, the purpose of these embodiments is to provide a more thorough and complete understanding of the disclosure of the present invention.
    As shown in Figures 1 and 2, the LED driver circuit with stepwise adjustable power of the present invention comprises a constant current IC chip U1, a power supply unit 1 connecting to the constant current IC chip U1, a switch control unit 2 and a driving unit 3. The driving unit 3 connects to the switch control unit 2. The LED driver circuit also comprises a power regulation unit 4. The power regulation unit 4 connects to the constant current IC chip U1, the switch control unit 2 and the driving unit 3.
    The power supply unit 1 comprises a 300V voltage input, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a diode D1, a capacitor C5 and a resistor R10. An internal multiplier input pin MULT of the constant current IC chip U1 connects to the 300V voltage input via the resistor R4 and the resistor R5. A zero current detection pin ZCD of the constant current IC chip U1 is grounded via the resistor R10. The capacitor C5 is connected in parallel with two ends of the resistor R10. The diode D1 has a positive pole which is grounded and a negative pole which connects to the zero current detection pin ZCD of the constant current IC chip U1.
    Each of the resistor R3 and the capacitor C1 has one end which connects to the internal multiplier input pin MULT of the constant current IC chip U1 and another end which is grounded.
    The switch control unit 2 comprises a field effect transistor Q1, a diode D3, a resistor R15, a resistor R16, a resistor R11, a capacitor C8 and a capacitor C10. A grid electrode of the field effect transistor Q1 connects to a grid electrode drive pin GATE of the constant current 1C chip U1 via the resistor R15. A drain electrode of the field effect transistor Q1 connects to the 300V voltage input via the diode D3 and the resistor R11. A source electrode of the field effect transistor Q1 connects to a current detection pin CS of the constant current IC chip U1 via the resistor R16.
    The capacitor C8 is connected in parallel with two ends of the resistor R11, and the capacitor C10 is connected between the drain electrode and the source electrode of the field effect transistor Q1.
    The driving unit 3 comprises a transformer T2, a diode D4, a capacitor C14, a resistor R14 and a capacitor C11. A first primary coil of the transformer T2 has one end which connects to the 300V voltage input and another end which connects to the drain electrode of the field effect transistor Q1. A second primary coil of the transformer T2 has one end which connects to the zero current detection pin ZCD of the constant current IC chip U1 and another end which is grounded. A secondary coil of the transformer T2 has one end which connects to a positive pole of an LED load via the resistor R14 and the capacitor C11 and another end which connects to a negative pole of the LED load.
    The diode D4 has a positive pole which connects to one end of the secondary coil of the transformer T2 and a negative pole which connects to one end of the capacitor C14. Another end of the capacitor C14 connects to the negative pole of the LED load. In this embodiment, the negative pole of the LED load is grounded.
    The power regulation unit 4 comprises a plurality of switch groups connected in parallel. Each of the switch groups comprises a switch and a resistor connected in series. Each of the switch groups has one end which is grounded and another end which connects to the current detection pin CS of the constant current IC chip U1 via the resistor R16.
    In this embodiment, there are three switch groups. The power regulation unit 4 comprises a switch SW1, a switch SW2, a switch SW3, a resistor R21, a resistor R22 and a resistor R23. The switch SW1 connects in series with the resistor R21. The switch SW2 connects in series with the resistor R22. The switch SW3 connects in series with the resistor R23.
    In this embodiment, the constant current IC chip U1 has a model number of MP4021DS.
    The principle of the LED driver circuit with stepwise adjustable power of the present invention is as follows:
    During operation, the constant current 1C chip U1 controls the output current by sensing the voltage drop of the resistors. The higher the voltage detected by the fifth pin CS, the smaller the power. In contrast, the lower the voltage detected the greater the power. Therefore, when the switch SW1 is closed the resistor R21 is connected; when the switch SW2 is closed the resistor R22 is connected; when the switch SW3 is closed the resistor R23 is connected; power can be adjusted by adjusting the resistance according to the power requirement. As such, the present invention uses 12W, 15W, 18W (or) more stepwise adjustable power. It is applicable to LED lighting tubes, ceiling lights, panel lights and all types of LED stepwise adjustable power. It can guarantee power conversion efficiency and achieve adjustment of the power of the LED lighting tube as well as selection of an appropriate power, thereby effectively providing the benefits of energy-saving and environmental friendliness to consumers.
    Moreover, as shown in Figures 3 and 4, the present invention also provides an LED lighting tube which comprises a light cover 10, a power supply 20 provided in the light cover 10, a circuit board 30 provided with the LED driver circuit with stepwise adjustable power described above and an LED load 40 connected to the LED driver circuit with stepwise adjustable power. The light cover 10 is provided with a power regulating switch 50. The power regulating switch 50 connects to the LED driver circuit with stepwise adjustable power.
    In comparison with the prior art, the LED driver circuit with stepwise adjustable power and the LED lighting tube of the present invention can guarantee power conversion efficiency and achieve adjustment of the power of the LED lighting tube. It effectively brings down the cost of LED lighting tube and is beneficial for energysaving and environmental protection.
    The description and application of the present invention herein are descriptive. It is not intended that the scope of the invention be limited by the embodiments described above. The embodiments disclosed herein are subject to modifications and changes. It is known to the people having ordinary skill in the art that there are alternative embodiments and equivalents of various components. Those skilled in the art should understand that without departing from the spirit of the invention or essential characteristics thereof, the present invention can be realized in other forms, structures, layouts, ratios as well as by means of other units, materials and components. Without departing from the scope and spirit of the invention, modifications and changes can be made to the embodiments disclosed herein.
    权利要求:
    Claims (10)
    [1]
    An LED driver circuit with step-by-step adjustable power, characterized in that it comprises: a constant current IC chip U1, a power supply unit connected to the constant current IC chip U1, a switch control unit and a control unit, the control unit communicating with the switch control unit, the LED control circuit also comprising a power control unit, and wherein the power control unit with the constant current IC chip U1, the switch control unit and the control unit is connected.
    [2]
    The step-by-step adjustable power LED driver circuit according to claim 1, characterized in that the power supply unit has a 300 V voltage input, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a diode D1, a capacitor C5 and a resistor R10; that an internal multiplier input pin MULT of the constant current IC chip U1 is connected to the 300 V voltage input via the resistor R4 and the resistor R5; that a zero current detection pin ZCD of the constant current IC chip U1 is grounded through the resistor R10; that the capacitor C5 is in parallel connection with two ends of the resistor R10; and that the diode D1 has a positive pole that is grounded, and a negative pole that is connected to the zero current detection pin ZCD of the constant current IC chip U1.
    [3]
    The stepwise adjustable power LED driver circuit according to claim 2, characterized in that each of the resistor R3 and the capacitor C1 has one end which is connected to the internal multiplier input pin MULT of the constant current IC chip U1 connection, and another end that is grounded.
    [4]
    The step-by-step adjustable power LED driver circuit according to claim 3, characterized in that the switch control unit comprises a field effect transistor Q1, a diode D3, a resistor R15, a resistor R16, a resistor R11, a capacitor C8 and a capacitor C10; that a lattice electrode of the field effect transistor Q1 is connected via the resistor 15 to a lattice electrode control pin GATE of the constant current IC chip U1; that a drain electrode of the field-effect transistor Q1 is connected via the diode D3 and the resistor R11 to the 300 V voltage input; and that a source electrode of the field effect transistor Q1 is connected via a resistor R16 to a current detection pin CS of the constant current IC chip U1.
    [5]
    The LED control circuit with step-by-step adjustable power according to claim 4, characterized in that the capacitor C8 is in parallel with two ends of the resistor R11, and in that the capacitor C10 between the drain electrode and the source electrode of the field effect transistor Q1 is connected.
    [6]
    The LED control circuit with step-by-step adjustable power according to claim 5, characterized in that the control unit comprises a transformer T2, a diode D4, a capacitor C14, a resistor R14 and a capacitor C11; that a first primary coil of the transformer T2 has one end that is connected to the 300V voltage input, and another end that is connected to the drain electrode of the field effect transistor Q1; that a secondary coil of the transformer T2 has one end connected to the zero current detection pin ZCD of the constant current IC chip U1, and another end grounded; and that a secondary coil of the transformer T2 has one end that is connected via a resistor R14 and the capacitor C11 to a positive pole of an LED excitation, and another end which is connected to a negative pole of the LED excitation state.
    [7]
    The LED control circuit with step-by-step adjustable power according to claim 6, characterized in that the diode D4 has a positive pole connected to one end of the secondary coil of the transformer T2, and a negative pole connected to one end of the capacitor C14; and that another end of the capacitor C14 is connected to the negative pole of the LED excitation.
    [8]
    The LED control circuit with stepwise adjustable power according to claim 7, characterized in that the power control unit comprises a plurality of switch groups connected in parallel; that each of the switch groups includes a series-connected switch and resistor; and that each of the switch groups has one end that is grounded, and another end that is connected via the resistor R16 to the current detection pin CS of the constant current IC chip U1.
    [9]
    The LED control circuit with step-by-step adjustable power according to claim 8, characterized in that there are three switch groups.
    [10]
    An LED lighting tube, characterized in that the LED lighting tube comprises a light cover, a power supply provided in the light cover, a printed circuit board of the LED control circuit with step-by-step adjustable power according to one of claims 1-9, and an LED excitation which is connected to the LED driver circuit with stepwise adjustable power; that the light cover is provided with a power regulating switch; and that the power regulating switch is connected to the LED driver circuit with step-by-step adjustable power.
    类似技术:
    公开号 | 公开日 | 专利标题
    NL2015840B1|2019-01-28|LED driver circuit with stepwise adjustable power and LED lighting tube.
    CN107094329B|2019-01-29|LED drive circuit
    US9161412B2|2015-10-13|LED driving and dimming circuit and configuration method
    US20150319818A1|2015-11-05|Circuit arrangement and led lamp comprising the same
    US9681507B2|2017-06-13|Switched-mode converter control for lighting applications
    KR20130118493A|2013-10-30|Led lighting device using ballaster for fluorescent lamp
    US20150257230A1|2015-09-10|Light-emitting diode | driver, led lighting apparatus, and method of operating led lighting apparatus
    TW201408136A|2014-02-16|LED driving device
    US9173263B2|2015-10-27|Light module with linear LED serial group drive device
    Adragna2011|Primary-controlled high-PF flyback converters deliver constant dc output current
    US9462645B1|2016-10-04|LED driver circuit with stepwise adjustable power and LED lighting tube
    TW201616919A|2016-05-01|Solid state light source device and dimming circuit thereof
    KR101326988B1|2013-11-13|Bleed circuit, lighting control circuit and method thereof
    CN204993966U|2016-01-20|LED drive circuit and LED fluorescent tube of power are transferred in segmentation
    JP3201800U|2016-01-07|LED drive circuit and LED lamp segmented for power adjustment
    US10362647B2|2019-07-23|Amplitude dimming power supply for constant-voltage LED lamp group
    US20150173150A1|2015-06-18|Balanced AC Direct Driver Lighting System with a Valley Fill Circuit and a Light Balancer
    TWM486123U|2014-09-11|Self-excited TRIAC dimming circuit
    CN204836663U|2015-12-02|High pressure EL lamp driving circuit based on SP4403 driver chip
    Wu2011|Multi-channel constant current | LED driver for indoor LED luminaries
    TW201737760A|2017-10-16|Light source driver and lighting device including the same
    US9615416B2|2017-04-04|Apparatus for sensing input power source
    Chen et al.2013|A new double frequency dimmer for lighting device
    TW202106110A|2021-02-01|Driving device
    US20150097493A1|2015-04-09|Load driver and luminaire including the load driver
    同族专利:
    公开号 | 公开日
    DE102015120498A1|2017-02-02|
    GB201520668D0|2016-01-06|
    GB2540827A|2017-02-01|
    NL2015840B1|2019-01-28|
    CN105072747B|2017-08-25|
    CN105072747A|2015-11-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE10013215B4|2000-03-17|2010-07-29|Tridonicatco Gmbh & Co. Kg|Control circuit for light emitting diodes|
    JP4687735B2|2008-03-24|2011-05-25|東芝ライテック株式会社|Power supply device and lighting fixture|
    US7906913B2|2008-04-18|2011-03-15|Osram Sylvania Inc.|Low loss input channel detection device for a direct current powered lighting system|
    CN101649980A|2008-08-15|2010-02-17|胡奎生|High effective solar street light|
    WO2010021675A1|2008-08-18|2010-02-25|Superbulbs, Inc.|Settable light bulbs|
    US8294379B2|2009-11-10|2012-10-23|Green Mark Technology Inc.|Dimmable LED lamp and dimmable LED lighting apparatus|
    CN102264175A|2010-05-26|2011-11-30|马士科技有限公司|Light emitting diode lamp dimming device capable of realizing stepped dimming|
    CN101984735A|2010-11-26|2011-03-09|皇明洁能控股有限公司|Light emitting diode constant current driver and illuminating system|
    JP5679937B2|2011-09-14|2015-03-04|アルパイン株式会社|LED lighting time control method and control device|
    US9360198B2|2011-12-06|2016-06-07|Express Imaging Systems, Llc|Adjustable output solid-state lighting device|
    CN102711318A|2012-05-02|2012-10-03|浙江阳光照明电器集团股份有限公司|Intelligent control system of LED city public illumination lamp|
    WO2013184166A1|2012-06-06|2013-12-12|The Regents Of The University Of California|Switchable luminance led light bulb|
    US9049769B2|2012-06-07|2015-06-02|Seckin KEMAL SECILMIS|LED light bulb with failure indication and color change capability|
    US20140265931A1|2013-03-15|2014-09-18|Hatch Transformers, Inc.|Electrical Power Supply With Removable Plug-In Cartridge|
    CN103256509B|2013-05-22|2014-10-29|北京铨富光电科技有限公司|Sectional type LED dimming lamp without externally arranged dimmer and dimming method thereof|
    US9084322B2|2013-08-09|2015-07-14|Osram Sylvania Inc.|Bi-level current configurable driver|
    DE102014109466A1|2014-01-17|2015-07-23|Siteco Beleuchtungstechnik Gmbh|Circuit for LED power supply|
    US9510400B2|2014-05-13|2016-11-29|Ilumisys, Inc.|User input systems for an LED-based light|
    CN204993966U|2015-07-30|2016-01-20|惠州市信迪节能环保科技有限公司|LED drive circuit and LED fluorescent tube of power are transferred in segmentation|CN105375781A|2015-12-21|2016-03-02|常州市肯迪电器制造有限公司|Circuit system of handheld portable low-voltage DC endotherm knife|
    CN105530724B|2016-01-14|2019-01-18|华南理工大学|Independent dimming multipath LED drive circuit can be flowed based on SCC|
    CN109168215B|2018-09-04|2021-01-15|广东明丰电源电器实业有限公司|Dimming circuit based on multichannel control|
    法律状态:
    2021-07-07| MM| Lapsed because of non-payment of the annual fee|Effective date: 20201201 |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201510457766.7A|CN105072747B|2015-07-30|2015-07-30|A kind of LED drive circuit and LED lamp tube for being segmented adjusting power|
    [返回顶部]