CN201599589U - LED fluorescent lamp - Google Patents
LED fluorescent lamp Download PDFInfo
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- CN201599589U CN201599589U CN2009202125294U CN200920212529U CN201599589U CN 201599589 U CN201599589 U CN 201599589U CN 2009202125294 U CN2009202125294 U CN 2009202125294U CN 200920212529 U CN200920212529 U CN 200920212529U CN 201599589 U CN201599589 U CN 201599589U
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Abstract
The utility model discloses an LED fluorescent lamp, comprising a lamp tube of the LED fluorescent lamp, terminals at two ends of the lamp tube and a circuit board which is connected with the terminals and is positioned in the lamp tube; the circuit board is provided with an LED driving circuit which mainly comprises an EMI filter circuit, an over-voltage and over-current protecting circuit, a rectifying filter circuit and an LED array circuit which are connected in sequence; the EMI filter circuit receives 220V alternating current, and outputs the alternating current to the over-voltage and over-current protecting circuit after filter processing; the over-voltage and over-current protecting circuit outputs the alternating current to the rectifying filter circuit after carrying out over-voltage and over-current protecting process on the input alternating current; and the rectifying filter circuit converts the alternating current into direct current and outputs the direct current to the LED array circuit which leads an LED light-emitting tube to emit light after receiving the direct current. The LED fluorescent lamp effectively restrains grid ripple and high-frequency pulse interference and has reliable performance and high cost performance.
Description
Technical field
The utility model relates to a kind of lighting device, relates in particular to a kind of LED fluorescent lamp.
Background technology
The LED fluorescent lamp has low-power consumption, long characteristics of life-span, and it is representing the direction of green illumination.The driving of general LED mainly contains dual mode, a kind of is the resistance-capacitance depressurization formula, there is defective in this LED type of drive, at first is that efficient is low, consumes a large amount of electric energy on dropping resistor, even might surpass the electric energy that LED consumed, and big current drives can't be provided, because electric current is big more, the electric energy that consumes on dropping resistor is just big more, so the LED of resistance-capacitance depressurization formula dare not adopt parallel way, all adopt series system to reduce electric current; Next is the ability of burning voltage, can't guarantee to be no more than its operate as normal requirement, so all can adopt during deisgn product and reduce drivings of powering of LED both end voltage, but this to be a cost with reduction LED brightness by the electric current of LED, if design badly, can influence life-span of LED.The sharpest edges of resistance-capacitance depressurization mode driving LED are that cost is low.The type of drive of another kind of LED is constant current control, and this constant current drive mode can be avoided the change of LED forward voltage and cause the electric current change, and constant electric current makes the brightness stability of LED simultaneously, but cost is higher, and volume is bigger.These two kinds of type of drive are general LED type of drive, are not special LED type of drive at the LED fluorescent lamp, can not realize high cost performance in the driving of LED fluorescent lamp.
The utility model content
The technical problems to be solved in the utility model provides a kind of dependable performance, LED fluorescent lamp that cost performance is high.
In order to solve the problems of the technologies described above; the utility model LED fluorescent lamp; comprise the LED fluorescent-lamp tube; the terminal of this lamp tube ends; and the wiring board that is positioned at fluorescent tube inside that links to each other with this terminal; on this wiring board, be provided with led drive circuit; described led drive circuit is mainly by the EMI filter circuit; over-voltage over-current protection circuit; current rectifying and wave filtering circuit and led array circuit connect to form successively; this EMI filter circuit receives the 220V alternating current; and after handling, filtering exports this alternating current to over-voltage over-current protection circuit; this over-voltage over-current protection circuit carries out exporting current rectifying and wave filtering circuit to after over-voltage over-current protection is handled to the alternating current through filtering of input; this current rectifying and wave filtering circuit exports the led array circuit to after converting alternating current to direct current; this led array circuit is made up of row or multiple row led circuit; every row led circuit is in series by current limliting insurance resistance and LED luminous tube, makes the LED luminous tube luminous receive the direct current of input when this led array circuit after.
Described over-voltage over-current protection circuit adopts the mode that inserts piezo-resistance in parallel to realize overvoltage protection, and when line voltage was higher than limit value, piezo-resistance was moved, the protection subsequent conditioning circuit.After the factor that overvoltage takes place disappeared, system can recover operate as normal voluntarily.
The mode that described over-voltage over-current protection circuit adopts series connection to insert resettable fuse realizes overcurrent protection, and when circuit generation over-current phenomenon avoidance, resettable fuse presents high resistant, the rising of restriction electric current.After the factor that overcurrent takes place disappeared, system can recover operate as normal voluntarily.This resettable fuse and current limliting insurance resistance constitute dual overcurrent protection.
Preferably, between the current limliting of described led circuit insurance resistance and the LED luminous tube, also be connected to transient voltage and suppress diode, be used for transient suppression voltage, further protect the LED luminous tube of its back.This transient voltage suppresses diode and piezo-resistance constitutes dual overvoltage protection.
Described EMI filter circuit is made up of inductance and electric capacity, is used to suppress the electrical network ripple, and filtering is from the electromagnetic interference of electrical network.
In the described current rectifying and wave filtering circuit, constitute bridge rectifier by a plurality of diodes.
The utility model LED fluorescent lamp has effectively suppressed electrical network ripple and high-frequency impulse and has disturbed, and possesses the over-voltage over-current protection effect simultaneously, and dependable performance is simple in structure, the cost performance height.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the annexation schematic diagram of the circuit part of the utility model LED fluorescent lamp.
The specific embodiment
The utility model LED fluorescent lamp; comprise the LED fluorescent-lamp tube; the terminal of this lamp tube ends; and the wiring board that is positioned at fluorescent tube inside that links to each other by going between with this terminal; on this wiring board, be welded with led drive circuit; as shown in Figure 1; led drive circuit is mainly by EMI filter circuit 1; over-voltage over-current protection circuit 2; current rectifying and wave filtering circuit 3 and led array circuit 4 connect to form successively; EMI filter circuit 1 receives the 220V alternating current; and after handling, filtering exports this alternating current to over-voltage over-current protection circuit 2; the alternating current through filtering of 2 pairs of inputs of over-voltage over-current protection circuit carries out exporting current rectifying and wave filtering circuit 3 to after over-voltage over-current protection is handled; this current rectifying and wave filtering circuit 3 exports led array circuit 4 to after converting alternating current to direct current; this led array circuit 4 is made up of row or multiple row led circuit; every row led circuit is in series by current limliting insurance resistance and LED luminous tube, makes the LED luminous tube luminous receive the direct current of input when this led array circuit 4 after.
Below in conjunction with Fig. 1 each circuit in the led drive circuit is specifically described:
EMI filter circuit 1: terminal A, B link to each other with the terminal at fluorescent-lamp tube two ends by lead-in wire; insert the domestic 220V alternating current that generally uses; inductance L 1, L2; capacitor C 1, C2 form EMI filter circuit 1; suppress the electrical network ripple; the filtering electromagnetic interference, and will export over-voltage over-current protection circuit 2 to through the alternating current of filtering.
Over-voltage over-current protection circuit 2: adopt the mode that inserts piezo-resistance U1, series connection access current-limiting resistance in parallel to constitute over-voltage over-current protection circuit; in an embodiment of the present utility model, select for use resettable fuse PPTC1 as the current-limiting resistance in the over-voltage over-current protection circuit.From the alternating current input over-voltage over-current protection circuit 2 through filtering of EMI filter circuit 1, if overtension surpasses setting value, piezo-resistance is action just, the protection subsequent conditioning circuit.When circuit generation over-current phenomenon avoidance, PPTC1 presents high resistant, and the rising of restriction electric current the particularly important is, and switches on moment, and when the circuit dash current was excessive, PPTC1 played the effect that buffer current rises.After the factor that over-voltage and over-current takes place disappeared, system can recover operate as normal voluntarily.
Current rectifying and wave filtering circuit 3: as shown in Figure 1, D1-D4 constitutes bridge rectifier by diode, and capacitor C 3 is finished filter action.From the alternating current of over-voltage over-current protection circuit 2, through behind the current rectifying and wave filtering circuit, output DC.
Led array circuit 4: the DC voltage of current rectifying and wave filtering circuit 3 outputs exports led array circuit 4 to; in an embodiment of the present utility model; this led array circuit 4 is made up of six row; every row are connected mutually by a current limliting insurance resistance R T and 55 LED luminous tubes that produce white light; connect a transient voltage behind the current limliting insurance resistance R T and suppress diode TVS; play the transient voltage inhibitory action, further protect follow-up LED luminous tube.This embodiment of the present utility model has adopted 330 white light LEDs, and synthetic brightness is suitable with 40W fluorescence fluorescent lamp, but the LED fluorescent lamp power consumption that this embodiment of the utility model constitutes has only 15W, and economize on electricity obviously.
Below only expressed embodiment of the present utility model, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model patent scope.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (8)
1. LED fluorescent lamp; comprise the LED fluorescent-lamp tube; the terminal of this lamp tube ends; and the wiring board that is positioned at fluorescent tube inside that links to each other with this terminal; on this wiring board, be provided with led drive circuit; it is characterized in that; described led drive circuit is mainly by the EMI filter circuit; over-voltage over-current protection circuit; current rectifying and wave filtering circuit and led array circuit connect to form successively; this EMI filter circuit receives the 220V alternating current; and after handling, filtering exports this alternating current to over-voltage over-current protection circuit; this over-voltage over-current protection circuit carries out exporting current rectifying and wave filtering circuit to after over-voltage over-current protection is handled to the alternating current through filtering of input; this current rectifying and wave filtering circuit exports the led array circuit to after converting alternating current to direct current; this led array circuit is made up of row or multiple row led circuit; every row led circuit is in series by current limliting insurance resistance and LED luminous tube, makes the LED luminous tube luminous receive the direct current of input when this led array circuit after.
2. LED fluorescent lamp according to claim 1 is characterized in that, described over-voltage over-current protection circuit adopts the mode that inserts piezo-resistance in parallel to realize overvoltage protection, and when line voltage was higher than limit value, piezo-resistance was moved, the protection subsequent conditioning circuit.
3. LED fluorescent lamp according to claim 1; it is characterized in that the mode that described over-voltage over-current protection circuit adopts series connection to insert resettable fuse realizes overcurrent protection, when circuit generation over-current phenomenon avoidance; resettable fuse presents high resistant, the rising of restriction electric current.
4. LED fluorescent lamp according to claim 1 and 2 is characterized in that, between the current limliting insurance resistance and LED luminous tube of described led circuit, also is connected to transient voltage and suppresses diode, is used for transient suppression voltage, further protects the LED luminous tube of its back.
5. LED fluorescent lamp according to claim 4 is characterized in that, described transient voltage suppresses diode and piezo-resistance constitutes dual overvoltage protection.
6. LED fluorescent lamp according to claim 3 is characterized in that, described resettable fuse and current limliting insurance resistance constitute dual overcurrent protection.
7. LED fluorescent lamp according to claim 1 is characterized in that, described EMI filter circuit is made up of inductance and electric capacity.
8. LED fluorescent lamp according to claim 1 is characterized in that, in the described current rectifying and wave filtering circuit, constitutes bridge rectifier by a plurality of diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202125294U CN201599589U (en) | 2009-12-04 | 2009-12-04 | LED fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202125294U CN201599589U (en) | 2009-12-04 | 2009-12-04 | LED fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201599589U true CN201599589U (en) | 2010-10-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202125294U Expired - Fee Related CN201599589U (en) | 2009-12-04 | 2009-12-04 | LED fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201599589U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510620A (en) * | 2011-10-28 | 2012-06-20 | 周宏标 | LED (light-emitting diode) light source module |
| CN102625537A (en) * | 2012-03-26 | 2012-08-01 | 木林森股份有限公司 | LED driver |
| CN102651928A (en) * | 2011-02-25 | 2012-08-29 | 黄焕珠 | LED fluorescent lamp with over-voltage protection function |
| CN104080221A (en) * | 2013-03-26 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | LED (Light Emitting Diode) driving circuit and LED lamp |
| CN104735854A (en) * | 2013-12-24 | 2015-06-24 | 深圳市达特照明股份有限公司 | Anti-surge circuit and integrated circuit with same |
| CN107255971A (en) * | 2017-07-03 | 2017-10-17 | 惠州市天泽盈丰物联网科技股份有限公司 | Garment hanging system, controller and power supply protection circuit |
-
2009
- 2009-12-04 CN CN2009202125294U patent/CN201599589U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651928A (en) * | 2011-02-25 | 2012-08-29 | 黄焕珠 | LED fluorescent lamp with over-voltage protection function |
| CN102510620A (en) * | 2011-10-28 | 2012-06-20 | 周宏标 | LED (light-emitting diode) light source module |
| CN102625537A (en) * | 2012-03-26 | 2012-08-01 | 木林森股份有限公司 | LED driver |
| CN104080221A (en) * | 2013-03-26 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | LED (Light Emitting Diode) driving circuit and LED lamp |
| CN104080221B (en) * | 2013-03-26 | 2018-05-08 | 海洋王（东莞）照明科技有限公司 | A kind of LED drive circuit and LED light |
| CN104735854A (en) * | 2013-12-24 | 2015-06-24 | 深圳市达特照明股份有限公司 | Anti-surge circuit and integrated circuit with same |
| CN107255971A (en) * | 2017-07-03 | 2017-10-17 | 惠州市天泽盈丰物联网科技股份有限公司 | Garment hanging system, controller and power supply protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20101204 |