CN212573032U - LED dimming control circuit and lamp - Google Patents

LED dimming control circuit and lamp Download PDF

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Publication number
CN212573032U
CN212573032U CN202020987907.2U CN202020987907U CN212573032U CN 212573032 U CN212573032 U CN 212573032U CN 202020987907 U CN202020987907 U CN 202020987907U CN 212573032 U CN212573032 U CN 212573032U
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led
led lamp
power supply
isolated power
parallel
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张礼平
林孝兵
苏涛
杨池
钟小东
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Shenzhen Agc Lighting Technology Co ltd
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Shenzhen Agc Lighting Technology Co ltd
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Abstract

The utility model discloses a LED dimming control circuit and lamps and lanterns. The LED dimming control circuit comprises: the LED lamp set comprises a non-isolated power supply and an LED lamp set, wherein one end of the LED lamp set is electrically connected with a positive electrode of the non-isolated power supply, and the other end of the LED lamp set is electrically connected with a negative electrode of the non-isolated power supply; wherein, LED banks includes: the LED lamp comprises a plurality of LEDs and a resistor, wherein the LEDs are connected in parallel, and the resistor is connected with the LEDs in parallel. The embodiment of the utility model provides a weak induced-current that knot electric capacity produced is consumed through the resistance with a plurality of LED parallel connection, realizes turning off LED's completely when dimming signal closes.

Description

LED dimming control circuit and lamp
Technical Field
The utility model belongs to the technical field of the lamps and lanterns control technique and specifically relates to a LED dimming control circuit and lamps and lanterns are related to.
Background
At present, a non-isolated power supply is used for providing a driving power supply for an LED, but in the related art, in order to achieve a good heat dissipation effect, a heat dissipation carrier of the LED is generally a metal component. Because the input end and the output end of the non-isolated power supply are not electrically isolated, when the LED is electrified and the LED dimming signal is turned off, the junction capacitance between the LED and the ground wire generates weak induced current, so that the LED has a slight brightness phenomenon, namely when the dimming signal is turned off, the LED cannot be completely turned off.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a LED dimming control circuit can realize the turn-off control of non-isolated power supply to LED.
The utility model also provides a lamps and lanterns.
An embodiment of the utility model provides a LED dimming control circuit, include: a non-isolated power supply; one end of the LED lamp bank is electrically connected with the positive electrode of the non-isolated power supply, and the other end of the LED lamp bank is electrically connected with the negative electrode of the non-isolated power supply; wherein, the LED banks includes: a plurality of LEDs connected in parallel; a resistor connected in parallel with the plurality of LEDs.
The utility model discloses LED dimming control circuit has following beneficial effect at least: one end of the LED lamp bank is electrically connected with the anode of the non-isolated power supply, the other end of the LED lamp bank is electrically connected with the cathode of the non-isolated power supply, and the LED lamp bank is connected with a resistor in parallel. The junction capacitance voltage generated by the non-isolated power supply is consumed through the parallel resistor, and the LED is completely turned off when the dimming signal is turned off.
According to the utility model discloses a LED dimming control circuit of other embodiments, LED dimming control circuit still includes: the LED lamp sets are connected in series.
According to the utility model discloses a LED dimming control circuit of other embodiments, include: the LED lamp comprises a first LED lamp group and a second LED lamp group; the first LED lamp group is at least provided with a first LED and a second LED, and the first LED is connected with the second LED in parallel; the second LED lamp group is at least provided with a third LED and a fourth LED, and the third LED and the fourth LED are connected in parallel; wherein the first LED is connected in series with the third LED, and the second LED is connected in series with the fourth LED.
According to the utility model discloses a LED dimming control circuit of other embodiments still includes: a power supply module; the positive pole of the power module is electrically connected with the positive pole of the non-isolated power supply, and the negative pole of the power module is electrically connected with the negative pole of the non-isolated power supply.
In a second aspect, an embodiment of the present invention provides a light fixture, comprising a non-isolated power source; one end of the LED lamp bank is electrically connected with the positive electrode of the non-isolated power supply, and the other end of the LED lamp bank is electrically connected with the negative electrode of the non-isolated power supply; wherein, the LED banks includes: a plurality of LEDs connected in parallel; a resistor connected in parallel with the plurality of LEDs.
According to other embodiments of the present invention, a lamp comprises: the LED lamp sets are connected in series.
According to the utility model discloses a lamps and lanterns of other embodiments include: the LED lamp comprises a first LED lamp group and a second LED lamp group; the first LED lamp group is at least provided with a first LED and a second LED, and the first LED is connected with the second LED in parallel; the second LED lamp group is at least provided with a third LED and a fourth LED, and the third LED and the fourth LED are connected in parallel; wherein the first LED is connected in series with the third LED, and the second LED is connected in series with the fourth LED.
According to the utility model discloses a lamps and lanterns of other embodiments still include: a power supply module; the positive pole of the power module is electrically connected with the positive pole of the non-isolated power supply, and the negative pole of the power module is electrically connected with the negative pole of the non-isolated power supply.
According to the utility model discloses a lamps and lanterns of other embodiments still include packaging hardware, be used for the encapsulation non-isolated power with the LED banks.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
Fig. 1 is a specific circuit diagram of an LED dimming control circuit according to an embodiment of the present invention.
Reference numerals:
a first LED lamp group 100 and a second LED lamp group 200.
Detailed Description
The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
Referring to fig. 1, in a first aspect, the present embodiment provides an LED dimming control circuit. The LED dimming control circuit comprises a non-isolated power supply and an LED lamp group. The LED lamp group comprises a plurality of LEDs, and the LEDs are connected in parallel. One end of the LED lamp bank is electrically connected with the positive electrode of the non-isolated power supply, the other end of the LED lamp bank is electrically connected with the negative electrode of the non-isolated power supply, namely, the positive electrode of the non-isolated power supply is electrically connected with the positive electrode of the LED connected in parallel in the LED lamp bank, and the negative electrode of the non-isolated power supply is electrically connected with the negative electrode of the LED connected in parallel in the LED lamp bank. The LED lamp bank further comprises a resistor R, and the resistor R is connected with the LEDs in parallel. It can be understood that the number of parallel connected LEDs in the LED lamp set, and the number of resistors R connected in parallel with the LEDs can be adaptively adjusted according to actual requirements.
In some embodiments, the resistance of the resistor R can be adaptively adjusted according to the LEDs with different voltages. When the LED lamp bank receives a normal dimming signal, the resistance value of the resistor R is large, so that the current passing through the resistor R is reduced, and the LED connected in parallel in the LED lamp bank is not influenced. When the dimming signal received by the LED lamp bank is turned off, because the input end and the output end of the non-isolated power supply are not electrically isolated, a junction capacitor existing between the non-isolated power supply and the ground wire generates weak current, the weak current flows through the resistor R, and the resistor R generates corresponding power consumption, so that the weak current is released, and the LED lamp bank is turned off. Specifically, the voltage of the parallel LED in the LED lamp set is 6V, the resistance of the resistor R is 3K Ω, the current flowing through the resistor R is 2mA, the resistor R consumes 0.012W of power, the power consumed by the resistor R has little influence on the LED lamp set, but the weak current generated by the junction capacitor can be released, so as to completely turn off the LED.
In some embodiments, the LED dimming control circuit comprises a plurality of LED lamp groups, the plurality of LED lamp groups being connected in series. Specifically, the number of LED lamp sets connected in series can be adjusted according to the output voltage of the non-isolated power supply. The LED lamp sets are connected in series, so that the design of a non-isolated power supply is facilitated, and the non-isolated power supply is prevented from outputting low-voltage and large current. In some specific embodiments, the LEDs in the LED lamp groups connected in series are electrically connected, that is, the first LED1 of the first LED lamp group 100 is connected in series with the third LED1 of the second LED lamp group 200, the second LED2 of the first LED lamp group 100 is connected in series with the fourth LED2 of the second LED lamp group 200, and the nth LED N of the first LED lamp group 100 is connected in series with the nth LED N of the second LED lamp group 200. It can be understood that the other LED lamp groups are correspondingly electrically connected according to the above rule.
In some embodiments, the LED dimming control circuit further comprises a power module, a positive pole of the power module being electrically connected to a positive pole of the non-isolated power source, and a negative pole of the power module being electrically connected to a negative pole of the non-isolated power source. Namely, the anode of the non-isolated power supply is connected with the live wire of the commercial power, the cathode of the non-isolated power supply is electrically connected with the zero line of the commercial power, and the power supply module provides power supply voltage for the LED dimming control circuit.
In a second aspect, the present embodiment provides a luminaire. The light fixture comprises a non-isolated power supply and an LED lamp group. The LED lamp group comprises a plurality of LEDs, and the LEDs are connected in parallel. One end of the LED lamp bank is electrically connected with the positive electrode of the non-isolated power supply, the other end of the LED lamp bank is electrically connected with the negative electrode of the non-isolated power supply, namely, the positive electrode of the non-isolated power supply is electrically connected with the positive electrode of the LED connected in parallel in the LED lamp bank, and the negative electrode of the non-isolated power supply is electrically connected with the negative electrode of the LED connected in parallel in the LED lamp bank. The LED lamp bank further comprises a resistor R, and the resistor R is connected with the LEDs in parallel. It can be understood that the number of parallel connected LEDs in the LED lamp set, and the number of resistors R connected in parallel with the LEDs can be adaptively adjusted according to actual requirements.
In some embodiments, the resistance of the resistor R can be adaptively adjusted according to the LEDs with different voltages. When the LED lamp bank receives a normal dimming signal, the resistance value of the resistor R is large, so that the current passing through the resistor R is reduced, and the LED connected in parallel in the LED lamp bank is not influenced. When the dimming signal received by the LED lamp bank is turned off, because the input end and the output end of the non-isolated power supply are not electrically isolated, a junction capacitor existing between the non-isolated power supply and the ground wire generates weak current, the weak current flows through the resistor R, the resistor R generates corresponding power consumption, and the weak current is released, so that the LED lamp bank is turned off. Specifically, the voltage of the parallel-connected LEDs in the LED lamp set is 6V, the resistance of the resistor R is 3K Ω, the current flowing through the resistor R is 2mA, the resistor R consumes 0.012W of power, the power consumed by the resistor R has little influence on the LED lamp set, but weak current generated by the junction capacitor can be released, and the LEDs can be completely turned off.
In some embodiments, the light fixture includes a number of LED light groups, the number of LED light groups being connected in series. Specifically, the number of LED lamp sets connected in series can be adjusted according to the output voltage of the non-isolated power supply. The LED lamp sets are connected in series, so that the design of a non-isolated power supply is facilitated, and the non-isolated power supply is prevented from outputting low-voltage and large current. In some specific embodiments, the LEDs in the LED lamp groups connected in series are electrically connected, that is, the first LED1 of the first LED lamp group 100 is connected in series with the third LED1 of the second LED lamp group 200, the second LED2 of the first LED lamp group 100 is connected in series with the fourth LED2 of the second LED lamp group 200, and the nth LED N of the first LED lamp group 100 is connected in series with the nth LED N of the second LED lamp group 200. It can be understood that the other LED lamp groups are correspondingly electrically connected according to the above rule.
In some embodiments, the lamp further comprises a power module, an anode of the power module being electrically connected to the anode of the non-isolated power source, and a cathode of the power module being electrically connected to the cathode of the non-isolated power source. Namely, the anode of the non-isolated power supply is connected with the live wire of the commercial power, the cathode of the non-isolated power supply is electrically connected with the zero line of the commercial power, and the power supply module provides power supply voltage for the lamp.
In some embodiments, the luminaire further comprises a packaging device, wherein the packaging device is configured to package the non-isolated power supply and the LED lamp set described in any of the above embodiments, so as to ensure the circuit safety of the luminaire.
In a specific embodiment, the positive electrode of the power module is electrically connected with the positive electrode of the non-isolated power supply, namely the live line of the commercial power is electrically connected with the positive electrode of the non-isolated power supply; the negative pole of the power supply module is electrically connected with the negative pole of the non-isolated power supply, namely the zero line of the commercial power is electrically connected with the negative pole of the non-isolated power supply. The LED lamp sets are connected in series and comprise a plurality of LEDs and a resistor R which are connected in parallel, and the resistor R is connected with the LEDs which are connected in parallel. The anode of the non-isolated power supply is electrically connected with the anode of the LED connected in parallel in the LED lamp bank, and the cathode of the non-isolated power supply is electrically connected with the cathode of the LED connected in parallel in the LED lamp bank.
The embodiment of the utility model provides an in, constitute the LED banks through earlier with a plurality of LED parallel connection, again with a plurality of LED banks series connection to all include in every group LED banks with a plurality of LED parallel connection's resistance R. When the dimming signal is turned off, the resistor R is used for consuming weak current generated by the junction capacitor, and the complete turn-off of the LED is realized.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims (9)

  1. An LED dimming control circuit, comprising:
    a non-isolated power supply;
    one end of the LED lamp bank is electrically connected with the positive electrode of the non-isolated power supply, and the other end of the LED lamp bank is electrically connected with the negative electrode of the non-isolated power supply;
    wherein, the LED banks includes: a plurality of LEDs connected in parallel;
    a resistor connected in parallel with the plurality of LEDs.
  2. 2. The LED dimming control circuit of claim 1, further comprising: the LED lamp sets are connected in series.
  3. 3. The LED dimming control circuit of claim 2, comprising: the LED lamp comprises a first LED lamp group and a second LED lamp group;
    the first LED lamp group is at least provided with a first LED and a second LED, and the first LED and the second LED are connected in parallel;
    the second LED lamp group is at least provided with a third LED and a fourth LED, and the third LED and the fourth LED are connected in parallel;
    wherein the first LED is connected in series with the third LED, and the second LED is connected in series with the fourth LED.
  4. 4. The LED dimming control circuit of claim 3, further comprising: a power supply module;
    the positive pole of the power module is electrically connected with the positive pole of the non-isolated power supply, and the negative pole of the power module is electrically connected with the negative pole of the non-isolated power supply.
  5. 5. A light fixture, comprising:
    a non-isolated power supply;
    one end of the LED lamp bank is electrically connected with the positive electrode of the non-isolated power supply, and the other end of the LED lamp bank is electrically connected with the negative electrode of the non-isolated power supply;
    wherein, the LED banks includes: a plurality of LEDs connected in parallel;
    a resistor connected in parallel with the plurality of LEDs.
  6. 6. A light fixture as recited in claim 5, wherein the light fixture comprises: the LED lamp sets are connected in series.
  7. 7. The luminaire of claim 6, comprising: the LED lamp comprises a first LED lamp group and a second LED lamp group;
    the first LED lamp group is at least provided with a first LED and a second LED, and the first LED and the second LED are connected in parallel;
    the second LED lamp group is at least provided with a third LED and a fourth LED, and the third LED and the fourth LED are connected in parallel;
    wherein the first LED is connected in series with the third LED, and the second LED is connected in series with the fourth LED.
  8. 8. The luminaire of claim 7, further comprising: a power supply module;
    the positive pole of the power module is electrically connected with the positive pole of the non-isolated power supply, and the negative pole of the power module is electrically connected with the negative pole of the non-isolated power supply.
  9. 9. A light fixture as recited in any one of claims 5-8, further comprising packaging means for packaging the non-isolated power supply and the LED light bank.
CN202020987907.2U 2020-06-03 2020-06-03 LED dimming control circuit and lamp Active CN212573032U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020987907.2U CN212573032U (en) 2020-06-03 2020-06-03 LED dimming control circuit and lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020987907.2U CN212573032U (en) 2020-06-03 2020-06-03 LED dimming control circuit and lamp

Publications (1)

Publication Number Publication Date
CN212573032U true CN212573032U (en) 2021-02-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020987907.2U Active CN212573032U (en) 2020-06-03 2020-06-03 LED dimming control circuit and lamp

Country Status (1)

Country Link
CN (1) CN212573032U (en)

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