CN203560762U - LED PAR lamp - Google Patents
LED PAR lamp Download PDFInfo
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- CN203560762U CN203560762U CN201320763884.7U CN201320763884U CN203560762U CN 203560762 U CN203560762 U CN 203560762U CN 201320763884 U CN201320763884 U CN 201320763884U CN 203560762 U CN203560762 U CN 203560762U
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Abstract
The utility model relates to an LED lamp, and aims to solve the technical problems of providing an LED PAR lamp capable of using alternating current to drive the PAR lamp directly and effectively prolonging service life of the lamp. According to the technical scheme, the LED PAR lamp comprises a lens, a housing upper cover, an LED light source module, an irradiator, a housing lower cover, a drive circuit board and a lamp holder; a drive power circuit is arranged on the drive circuit board, the LED light source module comprises an LED light source and a light source circuit board, the drive power circuit comprises a power input terminal, a voltage terminal and a power output terminal, the voltage terminal is connected to the positive electrode of the LED light source, and the power output terminal is connected to the negative electrode of the LED light source; the drive power circuit further comprises a rectifying unit, a voltage stabilizing unit and a drive unit; the power input terminal is connected to the rectifying unit connected to the voltage stabilizing unit, and the voltage stabilizing unit is connected to the drive unit connected to the power output terminal. The LED PAR lamp is adaptable to the field of LED lighting.
Description
Technical field
The utility model relates to a kind of LED light fixture.
Background technology
Along with country advocates the activity of energy-saving and emission-reduction, LED light source illuminating product, with its good energy-conservation, low-carbon (LC) and environmental protection, develops rapidly, further extensive in the application of lighting field.When LED element is during as light source of illumination device, the life-span of lighting device is not only depended on LED light source, is also decided by the assemblies such as driving power.In current technical scheme, the bottleneck in LED lighting device life-span remains driving power.In order to reduce the driving power life-span to the impact of LED lighting device life-span, generally take two kinds of measures: 1. improve existing dc source drive unit, 2. design the circuit of the brand-new direct driving LED of AC power.
For the widely used PAR lamp of domestic consumer (Parabolic Aluminum Reflector light, also claims Down lamp), the driving life-span of existing LED PAR lamp is shorter.Present LED PAR lamp on the market, comprise lens, case top lid, LED light source module, radiator, housing lower cover, drive circuit board and lamp holder, on drive circuit board, be provided with driving power circuit, drive circuit board is arranged in the confined space of lamp holder and radiator formation, LED light source module comprises LED light source and light source circuit board, the light source circuit board electrical connection of drive circuit board and LED light source module.
The voltage port of driving power circuit is connected with the positive pole of LED light source, for the LED light source on light source circuit board provides basic supply voltage, also has at least one power output end to be connected with the negative pole of LED light source, makes the LED light source conducting on light source circuit board.If the LED light source on light source circuit board is integrated design, driving power circuit only needs a voltage port and an output port; If there are a plurality of grouping LED light sources on light source circuit board, driving power circuit needs a voltage port and the power output end identical with LED light source group number, or voltage port and the power output end identical with LED light source group number.And consider cost and processing technology, conventionally use the LED light source of Integral design, or there is the grouping LED light source of same voltage port.
Normally used driving power circuit is traditional switch power technology, i.e. traditional dc source drive unit, and this technology is relatively ripe, but the volume of power supply is larger, and heat dispersion has been proposed to higher requirement.Adopt the LED PAR lamp of this power technology, because its space that offers drive circuit board is too narrow and small, operating ambient temperature higher (higher than 60 ℃), directly causes the shortening in driving power life-span; In addition, because Switching Power Supply cost is high, and needing additional auxiliary element, cause EMC(Electro Magnetic Compatibility, Electro Magnetic Compatibility) characteristic is poor.Once and existing LED PAR lamp damages, just needs are directly changed drive circuit board to keep in repair, but owing to being subject to the restriction of LED PAR lamp size, generally can only changing and specify producer, the drive circuit board of appointment model, and maintenance process complexity.
In addition the LED PAR lamp that also has the direct driving LED circuit of AC power, the method for employing is traditional resistance-capacitance depressurization or adopts the linear constant current technology of single channel.Yet, although resistance-capacitance depressurization cost is low, power factor lower (being generally 0.2～0.5) and need high-voltage capacitance, and the volume of high-voltage capacitance is large, life-span, well below LED light source, once capacitance damage LED light source also just all can be breakdown, directly causes whole LED PAR lamp to be scrapped; Adopt the linear constant current technology of single channel, although solved the problem on the low side (generally 0.8～0.85) of power factor, but in the one-period of electric main work, because circuit needs a starting resistor, this voltage is generally higher, thereby there is circuit for a long time in off position (utilization rate is lower than 60%), directly to affect use and the life-span thereof of LED PAR lamp.Therefore need a kind of technology can solve the problem of prior art.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of LED PAR lamp, can directly with alternating current, drive PAR lamp, the service life of effectively improving light fixture.
The utility model solves the technical scheme that its technical problem adopts: LED PAR lamp, comprise lens, case top lid, LED light source module, radiator, housing lower cover, drive circuit board and lamp holder, on drive circuit board, be provided with driving power circuit, LED light source module comprises LED light source and light source circuit board, driving power circuit comprises power input, voltage port and power output end, voltage port is connected with the positive pole of LED light source, power output end is connected with the negative pole of LED light source, driving power circuit also comprises rectification unit, voltage regulation unit and driver element, power input is connected with rectification unit, rectification unit is connected with voltage regulation unit again, voltage regulation unit is connected with driver element, driver element is connected with power output end.
Concrete, power input comprises first input end and the second input, first input end and the second input be the two ends of incoming transport civil power respectively.
Further, rectification unit is bridge rectifier unit, comprises voltage port, the first commutation diode, the second commutation diode, the 3rd commutation diode and the 4th commutation diode;
First input end is connected with the negative pole anodal and the second commutation diode of the first commutation diode, the positive pole of the second commutation diode joins with ground after being connected with the positive pole of the 4th commutation diode in the lump, the second input is connected with the negative pole anodal and the 4th commutation diode of the 3rd commutation diode, and the negative pole of the negative pole of the 3rd commutation diode and the first commutation diode is connected with voltage port respectively.
Preferably, the first commutation diode, the second commutation diode, the 3rd commutation diode and the 4th commutation diode are Schottky diode.
Further, voltage regulation unit comprises voltage stabilizing input, the first output end of pressure-stabilizing, the second output end of pressure-stabilizing, the first resistance, the second resistance, the first Zener diode, the second Zener diode, the first filter capacitor and the second filter capacitor;
Voltage stabilizing input is connected with one end of voltage port, the first resistance and one end of the second resistance, the other end of the first resistance is connected with negative pole and first output end of pressure-stabilizing of the first Zener diode, the positive pole of the first Zener diode joins with ground, and the first filter capacitor and the first Zener diode are connected in parallel; The other end of the second resistance is connected with negative pole and second output end of pressure-stabilizing of the second Zener diode, and the positive pole of the second Zener diode joins with ground, and the second filter capacitor and the second Zener diode are connected in parallel.
Further, driver element comprises transport and placing device, resistance and transistor;
The first output end of pressure-stabilizing is connected with the in-phase end of transport and placing device, the second output end of pressure-stabilizing is connected with the feeder ear of transport and placing device, the end of oppisite phase of transport and placing device is connected with transistorized source electrode, transistorized source electrode joins by resistance and ground again, the output of transport and placing device is connected with the grid of transport and placing device, and transistorized drain electrode is connected with power output end.
Preferably, transistor is N-MOSFET pipe.
As the preferred version of technique scheme, LED light source is at least two groups, and power output end is identical with the group number of LED light source, and driver element is at least two, and each driver element is corresponding one by one with corresponding power output end.
The beneficial effects of the utility model are: because driving power circuit of the present utility model does not utilize needed electrochemical capacitor or inductance in traditional switch power technology, therefore can effectively extend the service life of light fixture, and there is good EMC characteristic, circuit structure is simple, with low cost, volume is little, and power is larger.The utility model is applicable to LED lighting field.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model embodiment 1 driving power circuit;
Fig. 3 is the structural representation of the utility model embodiment 2 driving power circuits;
Wherein, 1 is lens, 2 is case top lid, 3 is LED light source module, 4 is radiator, 5 is housing lower cover, 6 is drive circuit board, 7 is lamp holder, 101 is the first commutation diode, 102 is the second commutation diode, 103 is the 3rd commutation diode, 104 is the 4th commutation diode, 201 is the first resistance, 202 is the second resistance, 203 is the 3rd resistance, 204 is the 4th resistance, 205 is the 5th resistance, 206 is the 6th resistance, 301 is the first Zener diode, 302 is the second Zener diode, 401 is the first filter capacitor, 402 is the second filter capacitor, 501 is the first transport and placing device, 502 is the second transport and placing device, 503 is the 3rd transport and placing device, 504 is four high guaily unit device, 601 is the first transistor, 602 is transistor seconds, 603 is the 3rd transistor, 604 is the 4th transistor, LED1 is the first light source, LED2 is secondary light source, LED3 is the 3rd light source, LED4 is the 4th light source, IN1 is first input end, IN2 is the second input, AC is electric main, GND is ground wire, OUT is the output of transport and placing device, VCC is the supply voltage of transport and placing device.
The specific embodiment
Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.
Structure of the present utility model as shown in Figure 1, LED PAR lamp of the present utility model, comprise lens 1, case top lid 2, LED light source module 3, radiator 4, housing lower cover 5, drive circuit board 6 and lamp holder 7, on drive circuit board 6, be provided with driving power circuit, LED light source module plate 3 is connected with radiator 4, can guarantee efficiently radiates heat; Case top lid 2 is connected with housing lower cover 5 lens 1 are connected with radiator 4; LED light source module 3 comprises LED light source and light source circuit board, driving power circuit comprises power input, voltage port and power output end, driving power circuit also comprises rectification unit, voltage regulation unit and driver element, power input is connected with rectification unit, rectification unit is connected with voltage regulation unit again, voltage regulation unit is connected with driver element, and driver element is connected with power output end.
The voltage port of driving power circuit is connected with the positive pole of LED light source on light source circuit board, and power output end is connected with the negative pole of LED light source on light source circuit board.
Embodiment 1
As shown in Figure 2, in this example, in the driving power circuit of LED PAR lamp, only comprise a driver element, and the LED light source in LED light source module is also for integral type designs.Its driving power circuit as shown in Figure 2.The positive pole of the 4th light source led 4 is connected with voltage port, and its negative pole is connected with the power output end of driving power circuit.
First input end IN1 and the second input IN2 be the two ends of incoming transport civil power AC respectively, first input end IN1 is connected with the negative pole anodal and the second commutation diode 102 of the first commutation diode 101, the positive pole of the second commutation diode 102 joins with ground after being connected with the positive pole of the 4th commutation diode 104 in the lump, the second input IN2 is connected with the negative pole anodal and the 4th commutation diode 104 of the 3rd commutation diode 103, the negative pole of the negative pole of the 3rd commutation diode 103 and the first commutation diode 101 is connected with voltage port respectively, form bridge rectifier unit, the good stability of bridge rectifier.In addition also can select other rectification circuits.Above-mentioned each commutation diode can be common commutation diode, can be also withstand voltage enough Schottky diodes or other components and parts that can realize identical function.In this example, select Schottky diode, because the electric conduction of Schottky diode forces down, operating rate is fast, is applicable to high-frequency high-speed circuit.
One end of the first resistance 201 is connected with voltage port, the other end of the first resistance 201 is connected with negative pole and first output end of pressure-stabilizing of the first Zener diode 301, the positive pole of the first Zener diode 301 joins with ground, and the first filter capacitor 401 and the first Zener diode 301 are connected in parallel; The first output end of pressure-stabilizing is also connected with the in-phase end of four high guaily unit device 504.
One end of the second resistance 202 is connected with voltage port, the other end of the second resistance 202 is connected with negative pole and second output end of pressure-stabilizing of the second Zener diode 302, the second Zener diode 302 is anodal to join with ground, the second filter capacitor 402 and the second Zener diode 302 are connected in parallel, the second output end of pressure-stabilizing is also connected with the feeder ear of four high guaily unit device 504, for four high guaily unit device 504 provides the supply voltage VCC of transport and placing device.
After the end of oppisite phase of four high guaily unit device 504 is connected with the 4th transistor 604 source electrodes, join in the lump by the 6th resistance 206 with ground wire GND, the output of four high guaily unit device 504 is connected with the grid of the 4th transistor 604; The drain electrode of the 4th transistor 604 is connected with power output end.
Electric main is output ripple direct current behind above-mentioned bridge rectifier unit.Rectified alternating current is by after the first resistance 201, the first Zener diode 301 and the first filter capacitor 401, and at a stable voltage V1 of positive pole acquisition of the first Zener diode 301, V1 is for providing required operating voltage to four high guaily unit device 504; Rectified alternating current is by after the second resistance 202, the second Zener diode 302 and the second filter capacitor 402, and at a stable voltage V2 of anode acquisition of the second Zener diode 302, V2 is for providing the reference voltage of required in-phase end to four high guaily unit device 504; The 6th resistance is for setting the electric current that flows through the 4th light source led 4.Set the forward conduction voltage VF4 of the 4th light source led 4.
When pulsating dc voltage rises to VF4 by 0V, the resistance value of four high guaily unit device 504 end of oppisite phase is the resistance after the 6th resistance 206 series connection, because the voltage of four high guaily unit device 504 in-phase ends is now greater than the voltage of end of oppisite phase, four high guaily unit device 504 output OUT are high voltage, make the 4th transistor 604 in conducting state, after the 4th light source led 4 conductings, start luminous.Electric current is after the 4th light source led 4 and the 4th transistor 604, and then through the 6th resistance 206, at the end of oppisite phase of four high guaily unit device 504, obtain the voltage of a feedback, for regulating the grid voltage of the 4th transistor 604, thereby make the 4th transistor 604 be operated in amplification region, realized constant current.
Embodiment 2
As shown in Figure 3, the LED light source that comprises four groups of separate design in LED PAR lamp in this example, and LED light source is connected in series successively, wherein every group of LED light source can be again a plurality of LED light source serial or parallel connections and forms.The first light source led 1, secondary light source LED2, the 3rd light source led 3, the 4th light source led 4 are connected in series successively, and the positive pole of the first light source led 1 is connected with voltage port, and the negative pole place of each light source is connected with the power output end of corresponding driving power circuit.
First input end IN1 and the second input IN2 be the two ends of incoming transport civil power AC respectively, first input end IN1 is connected with the negative pole anodal and the second commutation diode 102 of the first commutation diode 101, the positive pole of the second commutation diode 102 joins with ground after being connected with the positive pole of the 4th commutation diode 104 in the lump, the second input IN2 is connected with the negative pole anodal and the 4th commutation diode 104 of the 3rd commutation diode 103, the negative pole of the 3rd commutation diode 103 is connected with the negative pole of the first commutation diode 101, then voltage port is connected respectively again, form bridge rectifier unit.
One end of the first resistance 201 is connected with voltage port, the other end of the first resistance 201 is connected with negative pole and first output end of pressure-stabilizing of the first Zener diode 301, the positive pole of the first Zener diode 301 joins with ground, and the first filter capacitor 401 and the first Zener diode 301 are connected in parallel; The first output end of pressure-stabilizing is also connected with the in-phase end of the first transport and placing device 501, the second transport and placing device 502, the 3rd transport and placing device 503 and four high guaily unit device 504 respectively.
One end of the second resistance 202 is connected with voltage port, the other end of the second resistance 202 is connected with negative pole and second output end of pressure-stabilizing of the second Zener diode 302, the second Zener diode 302 is anodal to join with ground, the second filter capacitor 402 is connected in parallel on the second Zener diode 302 two ends, and the second output end of pressure-stabilizing is also connected with the feeder ear of the first transport and placing device 501, the second transport and placing device 502, the 3rd transport and placing device 503 and four high guaily unit device 504 respectively.
The 3rd resistance 203, the 4th resistance 204, the 5th resistance 205 and the 6th resistance 206 are connected in series successively; The end of oppisite phase of the first transport and placing device 501 is connected with the source electrode of the first transistor 601 and one end of the 3rd resistance 203, and the output of the first transport and placing device 501 is connected with the grid of the first transistor 601; The drain electrode of the first transistor 601 is connected with the first power output end, and the first power output end is connected with the negative pole of the first light source led 1;
The end of oppisite phase of the second transport and placing device 502 is connected with the other end of transistor seconds 602 source electrodes, the 3rd resistance 203 and one end of the 4th resistance 204, and the output of the second transport and placing device 502 is connected with the grid of transistor seconds 602; The drain electrode of transistor seconds 602 is connected with second source output, and second source output is connected with the negative pole of secondary light source LED2;
The end of oppisite phase of the 3rd transport and placing device 503 is connected with the 3rd transistor 603 source electrodes, the other end of the 4th resistance 204 and one end of the 5th resistance 205, and the output of the 3rd transport and placing device 503 is connected with the grid of the 3rd transistor 603; The drain electrode of the 3rd transistor 603 is connected with the 3rd power output end, and the 3rd power output end is connected with the negative pole of the 3rd light source led 3;
After the end of oppisite phase of four high guaily unit device 504 is connected with the 4th transistor 604 source electrodes, by the 6th resistance 206 ground connection, the output of four high guaily unit device 504 is connected with the grid of the 4th transistor 604 in the lump; The drain electrode of the 4th transistor 604 is connected with power output end.
Above-mentioned each transistor can be for N-MOSFET or NPN triode, with low cost, is convenient to control.
Two input IN1 and IN2 be the two ends of incoming transport civil power AC respectively, and electric main is output ripple direct current behind bridge rectifier unit.Rectified alternating current is by after the first resistance 201, the first Zener diode 301 and the first filter capacitor 401, positive pole at the first Zener diode 301 obtains a stable voltage V1, and V1 is for providing required operating voltage to the first transport and placing device 501, the second transport and placing device 502, the 3rd transport and placing device 503 and four high guaily unit device 504; Rectified alternating current is by after the second resistance 202, the second Zener diode 302 and the second filter capacitor 402, anode at the second Zener diode 302 obtains a stable voltage V2, and V2 is for providing the reference voltage of required in-phase end to the first transport and placing device 501, the second transport and placing device 502, the 3rd transport and placing device 503 and four high guaily unit device 504; The 3rd resistance 203, the 4th resistance 204, the 5th resistance 205 and the 6th resistance 206 are for setting the electric current that flows through each grouping LED power supply.The forward conduction voltage of setting the first light source led 1, secondary light source LED2, the 3rd light source led 3, the 4th light source led 4 is respectively VF1, VF2, VF3, VF4.
This routine operation principle is as follows:
When initial, when pulsating dc voltage rises to VF1 by 0V, the resistance value of the first transport and placing device 501 end of oppisite phase is the resistance after the 3rd resistance 203, the 4th resistance 204, the 5th resistance 205 and the 6th resistance 206 series connection, because the voltage of the first transport and placing device 501 in-phase ends is now greater than the voltage of end of oppisite phase, the first transport and placing device 501 outputs are high voltage, make the first transistor 601 in conducting state, after the first light source led 1 conducting, start luminous.Electric current is after the first light source led 1 and the first transistor 601, and then the 3rd resistance 203, the 4th resistance 204, the 5th resistance 205 and the 6th resistance 206 through connecting, at the end of oppisite phase of the first transport and placing device 501, obtain the voltage of a feedback, for regulating the grid voltage of the first transistor 601, thereby make the first transistor 601 be operated in amplification region, realized constant current.
When voltage rises to VF1+VF2 by VF1, the resistance value of the second transport and placing device 502 end of oppisite phase is the resistance after the 4th resistance 204, the 5th resistance 205 and the 6th resistance 206 series connection, because the voltage of the second transport and placing device 502 in-phase ends is now greater than the voltage of end of oppisite phase, the second transport and placing device 502 outputs are high voltage, make transistor seconds 602 in conducting state, after the first light source led 1 and secondary light source LED2 conducting, start luminous.Electric current is after the first light source led 1, secondary light source LED2 and transistor seconds 602, and then the 4th resistance 204, the 5th resistance 205 and the 6th resistance 206 through connecting, at the second transport and placing device 502 end of oppisite phase, obtain the voltage of a feedback, for regulating the grid voltage of transistor seconds 602, thereby make transistor seconds 602 be operated in amplification region, realized constant current.End of oppisite phase voltage at the second transport and placing device 502 is the reference voltage V2 that approaches in-phase end, thereby the 4th resistance 204 voltage that is connected to one end of the second transport and placing device 502 end of oppisite phase be infinite approach reference voltage V2, cause the voltage of one end that the 3rd resistance 203 is connected to the first transport and placing device 501 end of oppisite phase higher than reference voltage V2, now the first transport and placing device 501 output LOW voltages, make the first transistor 601 in cut-off state.
When voltage rises to VF1+VF2+VF3 by VF1+VF2, the resistance value of the 3rd transport and placing device 503 end of oppisite phase is the resistance after the 5th resistance 205 and the 6th resistance 206 series connection, because the voltage of the 3rd transport and placing device 503 in-phase ends is now greater than the voltage of end of oppisite phase, the 3rd transport and placing device 503 outputs are high voltage, make the 3rd transistor 603 in conducting state, after the first light source led 1, secondary light source LED2 and the 3rd light source led 3 conductings, start luminous.Electric current is after the first light source led 1, secondary light source LED2, the 3rd light source led 3 and the 3rd transistor 603, and then the 5th resistance 205 and the 6th resistance 206 through connecting, at the 3rd transport and placing device 503 end of oppisite phase, obtain the voltage of a feedback, for regulating the grid voltage of the 3rd transistor 603, thereby make the 3rd transistor 603 be operated in amplification region, realized constant current.End of oppisite phase voltage at the 3rd transport and placing device 503 is the reference voltage V2 that approaches in-phase end, thereby the 5th resistance 205 voltage that is connected to one end of the 3rd transport and placing device 503 end of oppisite phase be infinite approach reference voltage V2, cause the voltage of one end that the 4th resistance 204 is connected to the second transport and placing device 502 end of oppisite phase higher than reference voltage V2, now the second transport and placing device 502 output LOW voltages, make transistor seconds 602 in cut-off state; While the first transport and placing device 501 end of oppisite phase voltages are also higher than reference voltage V2, so the first transistor 601 is also in cut-off state.
When voltage rises to VF1+VF2+VF3+VF4 by VF1+VF2+VF3, the resistance value of four high guaily unit device 504 end of oppisite phase is the resistance of the 6th resistance 206, because the voltage of four high guaily unit device 504 in-phase ends is now greater than the voltage of end of oppisite phase, four high guaily unit device 504 outputs are high voltage, make the 4th transistor 604 in conducting state, after the first light source led 1, secondary light source LED2, the 3rd light source led 3 and the 4th light source led 4 conductings, start luminous.Electric current is after the first light source led 1, secondary light source LED2, the 3rd light source led 3, the 4th light source led 4 and the 4th transistor 604, and then through the 6th resistance 206, at four high guaily unit device 504 end of oppisite phase, obtain the voltage of a feedback, for regulating the grid voltage of the 4th transistor 604, thereby make the 4th transistor 604 be operated in amplification region, realized constant current.End of oppisite phase voltage at four high guaily unit device 504 is the reference voltage V2 that approaches in-phase end, thereby the 6th resistance 206 voltage that is connected to one end of four high guaily unit device 504 end of oppisite phase be infinite approach reference voltage V2, cause the voltage of one end that the 5th resistance 205 is connected to the 3rd transport and placing device 503 end of oppisite phase higher than reference voltage V2, now the 3rd transport and placing device 503 output LOW voltages, make the 3rd transistor 603 in cut-off state; Simultaneously the end of oppisite phase voltage of the first transport and placing device 501 and the second transport and placing device 502 is also higher than reference voltage V2, so the first transistor 601 and transistor seconds 602 are also in cut-off state.
Said process is reversible process, when voltage drops to VF1+VF2+VF3 from VF1+VF2+VF3+VF4, although now the output of four high guaily unit device 504 is high voltage, because lower voltage, do not reach and make the first light source led 1, secondary light source LED2, the voltage request that the 3rd light source led 3 and the 4th light source led 4 are lighted simultaneously, the feedback voltage simultaneously obtaining on the 6th resistance 206 reduces, directly caused the feedback voltage of the 3rd transport and placing device 503 end of oppisite phase also to reduce, the output that makes the 3rd transport and placing device 503 is high voltage, directly make the duty of the 3rd transistor 603 in amplification region.Electric current flow through the first light source led 1, secondary light source LED2, the 3rd light source led 3 and the 3rd transistor 603, therefore the first light source led 1, secondary light source LED2 and the 3rd light source led 3 continue luminously, and the 4th light source led 4 extinguishes.
When voltage drops to VF1+VF2 from VF1+VF2+VF3, the output of the 3rd transport and placing device 503 and four high guaily unit device 504 is all high voltage, because lower voltage, do not reach the voltage request that the first light source led 1, secondary light source LED2 and the 3rd light source led 3 are lighted simultaneously, therefore make do not have electric current to flow through on the 3rd transistor 603 and the 4th transistor 604, make the voltage of end of oppisite phase of the second transport and placing device 502 lower than reference voltage V2, the output that makes the second transport and placing device 502 is high voltage, and transistor seconds 602 begins operating in amplification region.Electric current flow through the first light source led 1, secondary light source LED2 and transistor seconds 602, therefore the first light source led 1, secondary light source LED2 continue luminously, and the 3rd light source led 3 and the 4th light source led 4 extinguish.
When voltage drops to VF1 from VF1+VF2, the output of the second transport and placing device 502, the 3rd transport and placing device 503 and four high guaily unit device 504 is all high voltage, because lower voltage, can not light the first light source led 1 and secondary light source LED2 simultaneously, therefore make do not have electric current to flow through on transistor seconds 602, the 3rd transistor 603 and the 4th transistor 604, make the end of oppisite phase voltage of the first transport and placing device 501 lower than reference voltage V2, the output that makes the first transport and placing device 501 is high voltage, and the first transistor 601 begins operating in amplification region.Electric current flows through the first light source led 1 and the first transistor 601, the first light source leds 1 continuation are luminous, and secondary light source LED2, the 3rd light source led 3 and the 4th light source led 4 extinguish.
When voltage drops to 0V from VF1, the output of the first transport and placing device 501, the second transport and placing device 502, the 3rd transport and placing device 503, four high guaily unit device 504 is all high voltage, because lower voltage, can not light the first light source led 1, therefore make do not have electric current to flow through on the first transistor 601, transistor seconds 602, the 3rd transistor 603 and the 4th transistor 604, therefore, the first light source led 1, secondary light source LED2, the 3rd light source led 3 and the 4th light source led 4 extinguish.
LED light source can be single low-voltage LED light source, can be also the high-voltage LED light sources that adopts COB encapsulation.
In this circuit, do not use needed electrochemical capacitor in traditional switch power technology, thereby the life-span is high; In same circuit, there is no inductance yet, thereby there is good EMC characteristic.Sort circuit is simple in structure, and cost is low, and the life-span is long.
Drive plate circuit of the present utility model is with the variation of voltage, to adjust the conducting number of LED light source, makes drive current variations close to voltage change, can effectively improve the utilization rate (being greater than 90%) of power factor (being not less than 0.95) and voltage.LEDPAR lamp is not used switch power technology to drive or the interchange direct driving technologies of traditional sectional management, and 20 utilize novel as mentioned above alternating current directly to drive, and make LED light source to light successively or to extinguish along with voltage change.
Claims (8)
1.LED PAR lamp, comprise lens (1), case top lid (2), LED light source module (3), radiator (4), housing lower cover (5), drive circuit board (6) and lamp holder (7), on drive circuit board, be provided with driving power circuit, LED light source module comprises LED light source and light source circuit board, driving power circuit comprises power input, voltage port and power output end, voltage port is connected with the positive pole of LED light source, power output end is connected with the negative pole of LED light source, it is characterized in that, driving power circuit also comprises rectification unit, voltage regulation unit and driver element, power input is connected with rectification unit, rectification unit is connected with voltage regulation unit again, voltage regulation unit is connected with driver element, driver element is connected with power output end.
2. LED PAR lamp as claimed in claim 1, is characterized in that, power input comprises first input end (IN1) and the second input (IN2), and first input end (IN1) and the second input (IN2) be the two ends of incoming transport civil power (AC) respectively.
3. LED PAR lamp as claimed in claim 2, is characterized in that, rectification unit is bridge rectifier unit, comprises the first commutation diode (101), the second commutation diode (102), the 3rd commutation diode (103) and the 4th commutation diode (104);
First input end (IN1) is connected with the negative pole anodal and the second commutation diode (102) of the first commutation diode (101), the positive pole of the second commutation diode (102) joins with ground after being connected with the positive pole of the 4th commutation diode (104) in the lump, the second input (IN2) is connected with the negative pole anodal and the 4th commutation diode (104) of the 3rd commutation diode (103), and the negative pole of the negative pole of the 3rd commutation diode (103) and the first commutation diode (101) is connected with voltage port respectively.
4. LED PAR lamp as claimed in claim 3, is characterized in that, the first commutation diode (101), the second commutation diode (102), the 3rd commutation diode (103) and the 4th commutation diode (104) are Schottky diode.
5. LED PAR lamp as claimed in claim 3, it is characterized in that, voltage regulation unit comprises voltage stabilizing input, the first output end of pressure-stabilizing, the second output end of pressure-stabilizing, the first resistance (201), the second resistance (202), the first Zener diode (301), the second Zener diode (302), the first filter capacitor (401) and the second filter capacitor (402);
Voltage stabilizing input is connected with one end of voltage port, the first resistance (201) and one end of the second resistance (202), the other end of the first resistance (201) is connected with negative pole and first output end of pressure-stabilizing of the first Zener diode (301), the positive pole of the first Zener diode (301) joins with ground, and the first filter capacitor (401) is connected in parallel with the first Zener diode (301); The other end of the second resistance (202) is connected with negative pole and second output end of pressure-stabilizing of the second Zener diode (302), the positive pole of the second Zener diode (302) joins with ground, and the second filter capacitor (402) is connected in parallel with the second Zener diode (302).
6. LED PAR lamp as claimed in claim 5, is characterized in that, driver element comprises transport and placing device, resistance and transistor;
The first output end of pressure-stabilizing is connected with the in-phase end of transport and placing device, the second output end of pressure-stabilizing is connected with the feeder ear of transport and placing device, the end of oppisite phase of transport and placing device is connected with transistorized source electrode, transistorized source electrode joins by resistance and ground again, the output of transport and placing device is connected with the grid of transport and placing device, and transistorized drain electrode is connected with power output end.
7. LED PAR lamp as claimed in claim 6, is characterized in that, transistor is N-MOSFET pipe.
8. LED PAR lamp as claimed in claim 6, is characterized in that, LED light source is at least two groups, and power output end is identical with the group number of LED light source, and driver element is at least two, and each driver element is corresponding one by one with corresponding power output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320763884.7U CN203560762U (en) | 2013-11-27 | 2013-11-27 | LED PAR lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320763884.7U CN203560762U (en) | 2013-11-27 | 2013-11-27 | LED PAR lamp |
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| Publication Number | Publication Date |
|---|---|
| CN203560762U true CN203560762U (en) | 2014-04-23 |
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| CN201320763884.7U Expired - Fee Related CN203560762U (en) | 2013-11-27 | 2013-11-27 | LED PAR lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797054A (en) * | 2015-04-28 | 2015-07-22 | 卫斌鹏 | LED sectional dimming resistance-capacitance driving power source |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797054A (en) * | 2015-04-28 | 2015-07-22 | 卫斌鹏 | LED sectional dimming resistance-capacitance driving power source |
| CN104797054B (en) * | 2015-04-28 | 2018-02-06 | 中山市俊利来电子科技有限公司 | LED sectional dimming capacitance-resistance driving powers |
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