CN107613605B - LED lamp - Google Patents
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- CN107613605B CN107613605B CN201710764777.9A CN201710764777A CN107613605B CN 107613605 B CN107613605 B CN 107613605B CN 201710764777 A CN201710764777 A CN 201710764777A CN 107613605 B CN107613605 B CN 107613605B
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- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000004146 energy storage Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 241001465382 Physalis alkekengi Species 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 7
- 238000005286 illumination Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to an LED lamp, which is characterized in that N constant current drivers (N is more than or equal to 2) are arranged, and then high-voltage positive lines bus+ of each constant current driver are collected to a node A so as to supply power to an LED load together, and the arrangement has the following advantages: when the LED lamp works normally, the output power of each constant current driver is only 1/N of the output power of the existing constant current drivers, which is equivalent to the improvement of the working allowance of each constant current driver by N times, and the constant current drivers work in a surplus state, so that the loss rate of the constant current drivers is reduced, and the whole service life of the LED lamp is prolonged; and if the constant current driver is damaged and loses power, the other constant current drivers supply power to the LED load, the power supply is uninterrupted, the service life of the LED lamp is further prolonged, and when the constant current driver is damaged and loses power, the other constant current drivers automatically increase the current output to the high-voltage positive line bus+ so that the overall output power of the LED lamp tends to be consistent before and after the constant current driver is damaged, and the difference of illumination brightness of the LED lamp is avoided.
Description
Technical Field
The invention relates to the technical field of LEDs, in particular to an LED lamp.
Background
The conventional LED lamp consists of a constant current driver, an LED load and a shell, wherein the service life of the LED load is generally 5-10 ten thousand hours, the shell is basically long unless being damaged by external force, and the life of the shell is shortest when the LED lamp belongs to the constant current driver.
Disclosure of Invention
The invention aims to prolong the service life of the LED lamp.
The aim of the invention is realized by the following technical scheme:
The utility model provides a LED lamps and lanterns, including constant current driver and LED load, the constant current driver is equipped with high voltage positive line bus+ and constant current circuit, and constant current circuit outputs constant current to high voltage positive line bus+, and the LED load gets the electricity from high voltage positive line bus+, the constant current driver is equipped with at least two, and the high voltage positive line bus+ of each constant current driver gathers to node A, supplies power for the LED load jointly through node A, if there is the constant current driver to lose electricity, other constant current drivers increase its electric current that outputs to high voltage positive line bus+.
Each constant current driver is provided with a control circuit, and the control circuit outputs an electric signal to the constant current circuit when receiving a trigger signal, so that the constant current circuit of the constant current driver increases current. The control circuit comprises a switch and a resistor R4, wherein the resistor R4 is connected with the constant current circuit in parallel in a state that the switch is conducted.
The switch is a MOS tube Q1, the source electrode of the MOS tube Q1 is grounded, the drain electrode of the MOS tube Q1 is connected to the constant current circuit through a resistor R4, and the grid electrode of the MOS tube Q1 receives an external trigger signal.
The control circuit is provided with a MOS tube Q1 and a resistor R4, the source electrode of the MOS tube Q1 is grounded, the drain electrode of the MOS tube Q1 is connected to the constant current circuit through the resistor R4, the grid electrode of the MOS tube Q1 receives an external trigger signal, and the MOS tube Q1 is connected with the resistor R4 with a fixed resistance value in parallel to the constant current circuit.
The control circuit is provided with an optical coupler U2 for signal isolation, the output end of the optical coupler U2 is connected with the grid electrode of the MOS tube Q1, and the input end of the optical coupler U2 receives an external trigger signal.
And each constant current driver is provided with a monitoring circuit, and if the constant current driver loses power, the monitoring circuit of the constant current driver outputs a trigger signal to the control circuits of other constant current drivers.
The monitoring circuit comprises a resistor R1, a resistor R2, a PNP tube and a diode D1, wherein the resistor R1 and the resistor R2 are connected in series and then are connected with the output end of the constant current circuit in parallel, the diode D1 is connected on a high-voltage positive line bus+ in series, the anode of the diode D1 is connected with the resistor R1, the cathode of the diode D1 is connected with a node A, the base of the PNP tube is connected with a joint between the resistor R1 and the resistor R2, the emitter of the PNP tube is connected with the node A, and the collector of the PNP tube is connected with the control circuit.
The monitoring circuit is also provided with a light emitting diode D2, the anode of the light emitting diode D2 is connected with the collector of the PNP tube, and the cathode of the light emitting diode D2 is connected with the control circuit.
The output end of each constant current driver is connected with a mounting resistor R3 in parallel.
Each constant current driver is provided with an anti-interference circuit and a rectification filter circuit, the input end of the anti-interference circuit is connected with a mains supply, the output end of the anti-interference circuit is connected with the rectification filter circuit, and the rectification filter circuit rectifies and filters alternating current and supplies power to the constant current circuit.
Wherein, the anti-interference circuit is a fuse resistor.
The beneficial effects are that:
The invention adopts a multi-power supply mode, sets N constant current drivers (N is more than or equal to 2), and then gathers high-voltage positive line bus+ of each constant current driver to a node A, and jointly supplies power to an LED load through the node A, so that the LED load has the following advantages: when the LED lamp works normally, the output power of each constant current driver is only 1/N of the output power of the existing constant current drivers, which is equivalent to the improvement of the working allowance of each constant current driver by N times, and the constant current drivers work in a surplus state, so that the loss rate of the constant current drivers is reduced, and the whole service life of the LED lamp is prolonged; and if the constant current driver is damaged and loses power, the other constant current drivers supply power to the LED load, the power supply is uninterrupted, the service life of the LED lamp is further prolonged, and when the constant current driver is damaged and loses power, the other constant current drivers automatically increase the current output to the high-voltage positive line bus+ so that the overall output power of the LED lamp tends to be consistent before and after the constant current driver is damaged, and the difference of illumination brightness of the LED lamp is avoided.
Drawings
The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation on the invention, and other drawings can be obtained by one of ordinary skill in the art without undue effort from the following drawings.
Fig. 1 is a circuit configuration diagram of an LED lamp.
Fig. 2 is a circuit configuration diagram of the anti-interference circuit and the rectifying and filtering circuit.
Fig. 3 is a circuit configuration diagram of the constant current circuit, the monitor circuit, and the control circuit.
Fig. 4 is a schematic structural diagram of an LED lamp according to the present invention.
Detailed Description
As shown in fig. 1, the high-voltage positive line bus+ of the constant-current driver 10 and the high-voltage positive line bus+' of the constant-current driver 20 are connected to each other to form a node a, and then the node a is connected to the LED load 30, and the two constant-current drivers 10 and 20 output constant-current currents to the node a through the high-voltage positive line bus+ respectively, and supply power to the LED load 30 through the node a, so as to jointly drive the LED load 30 to emit light. When the LED lamp works normally, the output power of the constant current driver 10 or the output power of the constant current driver 20 is only 1/2 of the output power of the existing constant current driver, which is equivalent to 2 times of the working allowance of the constant current driver 10 and the constant current driver 20, and the whole service life of the LED lamp is prolonged; and if the constant current driver is damaged and loses power, the other constant current driver supplies power to the LED load, the power supply is uninterrupted, the service life of the LED lamp is further prolonged, for example, if the constant current driver 10 is damaged and loses power, the constant current driver 20 supplies power to the LED load.
Since the constant current driver 10 and the constant current driver 20 are identical in structure and function, only the constant current driver 10 will be described below. Specifically, referring to fig. 2 and 3, the front stage of the constant current driver 10 adopts a safety resistor F1 as an anti-interference circuit 101, so as to resist surge current, the input end of the safety resistor F1 is connected with the mains supply, the output end of the safety resistor F1 is connected to a rectifying and filtering circuit 102, the rectifying and filtering circuit 102 is composed of a rectifying bridge VD1 and a filtering capacitor C2, alternating current is rectified into direct current by the rectifying bridge VD1, and the direct current is fed into the constant current circuit 103 after the ripple is reduced by the filtering capacitor C2, so as to supply power to the constant current circuit 103.
Referring to fig. 3, the constant current circuit 103 adopts a constant current chip U1 with a model BP2832A to realize high-frequency step-down DC-DC constant current control, wherein an inductor L1, a diode D3, a diode D4 and a capacitor C1 are sequentially connected in an end-to-end manner to form an energy storage loop, a CS pin of the constant current chip U1 is grounded through a resistor R9, and a DRAIN pin of the constant current chip U1 is connected to one end of the inductor L1. When the constant current chip U1 works, the voltage at the CS pin is detected, the voltage is compared with the internal threshold voltage, so that the turn-off of the internal power tube is controlled, a turn-off signal is output from the DRAIN pin to the energy storage loop, the energy storage time of the energy storage loop is controlled to realize constant current control, and finally constant current is output to the high-voltage positive line bus+.
Referring to fig. 1, the constant current output to the high-voltage positive line bus+ is monitored by the monitoring circuit 104, and if the monitoring circuit 104 monitors the constant current, it indicates that the constant current driver 10 is working normally, and if the monitoring circuit 104 does not monitor the constant current, it indicates that the constant current driver 10 is working abnormally and loses power. Specifically, the monitoring circuit 104 is composed of a resistor R1, a resistor R2, a PNP tube and a diode D1, wherein the resistor R1 and the resistor R2 are connected in series and then connected with the output end of the constant current circuit 103 in parallel, the diode D1 is connected in series on the high-voltage positive line bus+, the anode of the diode D1 is connected with the resistor R1, the cathode of the diode D1 is connected with a node a, the base of the PNP tube is connected with a junction between the resistor R1 and the resistor R2, the emitter of the PNP tube is connected with the node a, and the collector of the PNP tube is connected with the input end of the optocoupler U2' of the control circuit of the constant current driver 20. In the constant current driver 10, a control circuit 105 is provided, which is composed of an optocoupler U1, an N-channel MOS transistor Q1, a resistor R4, a resistor R12, and a resistor R10, wherein a collector of the optocoupler U1 is connected to an output end of the rectifying and filtering circuit through the resistor R10, and an emitter of the optocoupler U1 is grounded through the resistor R12 on one hand and connected to a gate of the MOS transistor Q1 on the other hand, so as to control conduction of the MOS transistor Q1. The source electrode of the MOS tube Q1 is grounded, and the drain electrode of the MOS tube Q1 is connected to the CS pin of the constant current chip U1 through a resistor R4.
When the constant current driver 10 loses power, the constant current driver 10 does not output, and then the base electrode of the PNP tube is powered down, so that the PNP tube is conducted, and the current output by the constant current driver 20 to the node A is guided into the optocoupler U2 'by the PNP tube, so that the optocoupler U2' is electrically conducted. Because the output end of the optocoupler U2 'is connected to the gate of the MOS transistor Q1', when the optocoupler U2 'is turned on, the MOS transistor Q1' of the control circuit of the constant current driver 20 is also turned on, so that the resistor R4 'is connected in parallel with the resistor R9', and the resistance value at the CS leg of the constant current chip U1 'is changed to be reduced, that is, the voltage of the CS leg of the constant current chip U1' is reduced. As the constant current chip U1' shortens the turn-off time of the turn-off signal at the DRAIN pin once detecting that the voltage of the CS pin is reduced, the energy storage time of the energy storage loop is prolonged, the output current value of the constant current driver 20 is increased, and the function of automatically increasing the output current is realized. The diode D1 is used for preventing the constant current output by the constant current driver 20 from flowing backward into the constant current driver 10 when the constant current driver 10 loses power, so as to cause secondary damage.
The light emitting diode D2 is connected in series between the collector of the PNP tube and the optocoupler U2', the anode of the light emitting diode D2 is connected with the collector of the PNP tube, and the cathode of the light emitting diode D2 is connected with the optocoupler U2', so that when the PNP tube is conducted due to the power failure of the constant current driver 10, the light emitting diode D2 emits light, thereby playing a role of warning and enabling a user to know that the constant current driver 10 is damaged. Further, the output end of the constant current driver 10 is connected with the mounting resistor R3 in parallel, so as to reduce the no-load voltage of the constant current driver 10, and discharge rapidly after shutdown, so that electromagnetic residue of the inductor L1 is avoided, and the constant current driver 10 can be started rapidly.
The anti-interference circuit 101 may be a fuse resistor F1 or a circuit having an EMC function.
Referring to fig. 4, the constant current driver 10 and the constant current driver 20 are respectively hidden in two plugs 40, and the two plugs 40 are respectively inserted into two ports of the LED lamp, wherein the plugs 40 are in a split insertion and extraction mode, and welding wires are not required during production, assembly and replacement of the plugs 40, so that the production efficiency is greatly improved, and users can replace and maintain the plugs 40.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (5)
- The utility model provides a LED lamps and lanterns, includes constant current driver and LED load, the constant current driver is equipped with high voltage positive line bus+ and constant current circuit, and constant current circuit output constant current to high voltage positive line bus+, and the LED load gets electricity from high voltage positive line bus+, its characterized in that:The LED load is powered by the node A, and if the constant current drivers are powered off, other constant current drivers automatically increase the current output to the high-voltage positive line bus+;each constant current driver is provided with a control circuit, the control circuit comprises a switch and a resistor R4, and the resistor R4 is connected with the constant current circuit in parallel under the state that the switch is conducted;The switch is a MOS tube Q1, the source electrode of the MOS tube Q1 is grounded, the drain electrode of the MOS tube Q1 is connected to the constant current circuit through a resistor R4, and the grid electrode of the MOS tube Q1 receives an external trigger signal;The control circuit is provided with an optical coupler U2 for signal isolation, the output end of the optical coupler U2 is connected with the grid electrode of the MOS tube Q1, and the input end of the optical coupler U2 receives an external trigger signal;Each constant current driver is provided with a monitoring circuit, and if the constant current driver loses power, the monitoring circuit of the constant current driver outputs a trigger signal to the control circuits of other constant current drivers;the monitoring circuit comprises a resistor R1, a resistor R2, a PNP tube and a diode D1, wherein the resistor R1 and the resistor R2 are connected in series and then are connected with the output end of the constant current circuit in parallel, the diode D1 is connected on a high-voltage positive line bus+ in series, the anode of the diode D1 is connected with the resistor R1, the cathode of the diode D1 is connected with a node A, the base of the PNP tube is connected with a junction between the resistor R1 and the resistor R2, the emitter of the PNP tube is connected with the node A, and the collector of the PNP tube is connected with the control circuit;The constant current circuit adopts a constant current chip U1 to realize high-frequency step-down DC-DC constant current control, wherein an inductor L1, a diode D3, a diode D4 and a capacitor C1 are sequentially connected in an end-to-end mode to form an energy storage loop, a CS pin of the constant current chip U1 is grounded through a resistor R9, and a DRAIN pin of the constant current chip U1 is connected with one end of the inductor L1; when the constant current chip U1 works, the voltage at the CS pin is detected, the voltage is compared with the internal threshold voltage, so that the turn-off of the internal power tube is controlled, a turn-off signal is output from the DRAIN pin to the energy storage loop, the energy storage time of the energy storage loop is controlled to realize constant current control, and finally constant current is output to the high-voltage positive line bus+.
- 2. The LED light fixture of claim 1 wherein: the monitoring circuit is also provided with a light emitting diode D2, the anode of the light emitting diode D2 is connected with the collector of the PNP tube, and the cathode of the light emitting diode D2 is connected with the control circuit.
- 3. The LED light fixture of claim 1 wherein: the output end of each constant current driver is connected with a mounting resistor R3 in parallel.
- 4. The LED light fixture of claim 1 wherein: each constant current driver is provided with an anti-interference circuit and a rectification filter circuit, the input end of the anti-interference circuit is connected with the mains supply, the output end of the anti-interference circuit is connected with the rectification filter circuit, and the rectification filter circuit rectifies and filters alternating current and supplies power to the constant current circuit.
- 5. The LED light fixture of claim 4 wherein: the anti-interference circuit is a safety resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764777.9A CN107613605B (en) | 2017-08-30 | 2017-08-30 | LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764777.9A CN107613605B (en) | 2017-08-30 | 2017-08-30 | LED lamp |
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| Publication Number | Publication Date |
|---|---|
| CN107613605A CN107613605A (en) | 2018-01-19 |
| CN107613605B true CN107613605B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710764777.9A Active CN107613605B (en) | 2017-08-30 | 2017-08-30 | LED lamp |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202799306U (en) * | 2012-09-05 | 2013-03-13 | 英飞特电子（杭州）股份有限公司 | Constant-current driver of light-emitting diode (LED) light source and LED lamp |
| CN103096561A (en) * | 2011-10-31 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Constant current driver of light emitting diode (LED) light source |
| CN103442501A (en) * | 2013-09-12 | 2013-12-11 | 江华 | Forced constant flow source dimming LED (Light Emitting Diode) lamp |
| CN207321588U (en) * | 2017-08-30 | 2018-05-04 | 木林森股份有限公司 | Led lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9368073B2 (en) * | 2013-08-12 | 2016-06-14 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | LED backlight driving circuit and LCD |
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2017
- 2017-08-30 CN CN201710764777.9A patent/CN107613605B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103096561A (en) * | 2011-10-31 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Constant current driver of light emitting diode (LED) light source |
| CN202799306U (en) * | 2012-09-05 | 2013-03-13 | 英飞特电子（杭州）股份有限公司 | Constant-current driver of light-emitting diode (LED) light source and LED lamp |
| CN103442501A (en) * | 2013-09-12 | 2013-12-11 | 江华 | Forced constant flow source dimming LED (Light Emitting Diode) lamp |
| CN207321588U (en) * | 2017-08-30 | 2018-05-04 | 木林森股份有限公司 | Led lamp |
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| CN107613605A (en) | 2018-01-19 |
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