A compensation circuit for the gap switch control signal of an LED lamp

Abstract

The present invention discloses a compensation circuit for the gap switch control signal of an LED lamp, which includes a gap switch signal detection and control circuit, an AC full-wave rectifier bridge circuit, and an LED lamp driver. The gap switch signal detection and control circuit and the AC full-wave rectifier bridge circuit are connected in parallel at the input end of the AC power supply circuit, and the output end of the AC full-wave rectifier bridge circuit is electrically connected to the AC input end of the LED lamp driver. The present invention solves the problem of unreliable phenomena caused by the interference of the capacitive equivalent circuit at the input end of the LED lamp driver during the AC power-off gap period on the gap switch signal detection and control circuit when using the gap switch signal method to control the on / off of the LED lamp, and greatly improves the reliability of the gap switch signal detection.

Description

Technical Field

[0001] The present invention relates to an intelligent lighting control circuit for LED lights, and more specifically to a compensation circuit for the intermittent switch control signal of LED lights. Background Art

[0002] Currently, most wireless remote control and voice control LED lights must be based on the wall switch in the AC circuit being in a long-term short-circuit state to work properly. This results in the inability to achieve manual on / off control of the LED lights by the wall switch. Only by adopting an intermittent uninterrupted switch method with instantaneous power-off and automatic reset can this contradiction be solved. However, when using the intermittent switch signal method to control the on / off of LED lights, due to the reverse discharge effect generated by the capacitive equivalent circuit at the input of the LED light driver during the AC power-off interval, interference to the intermittent switch signal detection and control circuit leads to unreliable phenomena. Summary of the Invention

[0003] The present invention makes full use of the unidirectional conduction characteristic of the AC full-wave rectifier bridge circuit to prevent the reverse discharge effect generated by the capacitive equivalent circuit at the input of the LED light driver during the instantaneous power-off of the AC power, and greatly improves the reliability of the intermittent switch signal detection.

[0004] Technical Solution: A compensation circuit for the intermittent switch control signal of LED lights includes an intermittent switch signal detection and control circuit, an AC full-wave rectifier bridge circuit, and an LED light driver. The intermittent switch signal detection and control circuit and the AC full-wave rectifier bridge circuit are connected in parallel at the input end of the AC circuit, and the output end of the AC full-wave rectifier bridge circuit is electrically connected to the AC input end of the LED light driver.

[0005] When the intermittent switch signal generated by the instantaneous power-off interval of the AC circuit passes through the intermittent switch signal detection and control circuit, the unidirectional conduction characteristic of the AC full-wave rectifier bridge circuit prevents the reverse discharge effect generated by the capacitive equivalent circuit at the input of the LED light driver during the instantaneous power-off of the AC power.

[0006] In one embodiment, an uninterruptible switch is further included. The two output poles, namely the A pole and the B pole, of the uninterruptible switch are in a short-circuited state and are connected in loop with the input end of the gap switch signal detection and control circuit. When the switch contact of the uninterruptible switch switches from the A pole to the B pole, an instantaneous power-off gap appears. At this time, the capacitive equivalent circuit at the input end of the LED lamp driver generates reverse discharge during the instantaneous power-off of the alternating current. Due to the unidirectional conduction characteristic of the alternating current full-wave rectifier bridge circuit, the reverse discharge generated by the capacitive equivalent circuit at the input end of the LED lamp driver during the instantaneous power-off of the alternating current is prevented from interfering with the gap switch signal detection and control circuit, resulting in unreliable phenomena, thus achieving the purpose of anti-interference.

[0007] Beneficial effects: The present invention solves the unreliable phenomena caused by the interference of the reverse discharge generated by the capacitive equivalent circuit at the input end of the LED lamp driver during the power-off gap of the alternating current to the gap switch signal detection and control circuit when the LED lamp is switched on and off by using the gap switch signal method, and greatly improves the reliability of the gap switch signal detection. Description of the Drawings

[0008] Figure 1 It is a schematic block diagram of the system principle of the present invention.

[0009] Figure 2 It is one of the schematic diagrams of the principle of the embodiment of the present invention.

[0010] Figure 3 It is the second schematic diagram of the principle of the embodiment of the present invention.

[0011] Figure 4 It is the third schematic diagram of the principle of the embodiment of the present invention.

[0012] In the figure: gap switch signal detection and control circuit 1, alternating current full-wave rectifier bridge circuit 2, LED lamp driver 3, uninterruptible switch 4. Detailed Embodiments

[0013] Unless otherwise defined, technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which this invention pertains. The terms "first", "second" and similar terms used in the specification and claims of this patent application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. Terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0014] See Figure 1 As shown, a compensation circuit for the gap switch control signal of an LED lamp includes a gap switch signal detection and control circuit 1, an AC full-wave rectifier bridge circuit 2, and an LED lamp driver 3. The gap switch signal detection and control circuit 1 and the AC full-wave rectifier bridge circuit 2 are connected in parallel at the input end of the AC circuit, and the output end of the AC full-wave rectifier bridge circuit 2 is electrically connected to the AC input end of the LED lamp driver 3.

[0015] When the gap switch signal generated by the instantaneous power-off gap of the AC circuit passes through the gap switch signal detection and control circuit 1, the one-way conduction characteristic of the AC full-wave rectifier bridge circuit 2 prevents the capacitive equivalent circuit at the input end of the LED lamp driver 3 from generating a reverse discharge during the instantaneous power-off of the AC.

[0016] See Figure 2 、 3 、As shown in Figure 4, an embodiment includes a gap switch signal detection and control circuit 1, an AC full-wave rectifier bridge circuit 2, an LED lamp driver 3, and an uninterruptible switch 4. The two output poles A and B of the uninterruptible switch 4 are in a short-circuited state and are connected in loop with the input end of the gap switch signal detection and control circuit 1. When the switch contact of the uninterruptible switch 4 switches from pole A to pole B, an instantaneous power-off gap occurs. At this time, the capacitive equivalent circuit at the input end of the LED lamp driver 3 generates a reverse discharge during the instantaneous power-off of the AC. However, due to the one-way conduction characteristic of the AC full-wave rectifier bridge circuit 2, the reverse discharge generated by the capacitive equivalent circuit at the input end of the LED lamp driver 3 during the instantaneous power-off of the AC is prevented from interfering with the gap switch signal detection and control circuit 1 and causing unreliable phenomena, achieving the purpose of anti-interference.

[0017] The above provides a detailed introduction to the embodiments of the present invention. For those of ordinary skill in the art, according to the idea of the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A compensation circuit for the gap switch control signal of an LED lamp, comprising a gap switch signal detection and control circuit, an AC full-wave rectifier bridge circuit, and an LED lamp driver, characterized in that: The gap switch signal detection and control circuit is connected in parallel with the AC full-wave rectifier bridge circuit on the AC circuit. The AC full-wave rectifier bridge circuit is bridged between the AC circuit and the LED lamp driver. The input end of the AC full-wave rectifier bridge circuit is electrically connected to the AC circuit, and the output end of the AC full-wave rectifier bridge circuit is electrically connected to the AC input end of the LED lamp driver; When the gap switch signal generated by the instantaneous power-off gap of the AC circuit passes through the gap switch signal detection and control circuit, the unidirectional conduction characteristic of the AC full-wave rectifier bridge circuit prevents the capacitive equivalent circuit at the input end of the LED lamp driver from generating a reverse discharge effect during the instantaneous power-off of the AC power.

2. The compensation circuit for the gap switch control signal of an LED lamp according to claim 1, characterized in that: It further includes an uninterruptible switch. The two output poles A and B of the uninterruptible switch are in a short-circuited state and are connected in loop with the input end of the gap switch signal detection and control circuit. When the switch contact of the uninterruptible switch switches from pole A to pole B, an instantaneous power-off gap occurs. At this time, the capacitive equivalent circuit at the input end of the LED lamp driver generates a reverse discharge during the instantaneous power-off of the AC power. Due to the unidirectional conduction characteristic of the AC full-wave rectifier bridge circuit, the reverse discharge current facing the AC circuit generated by the capacitive equivalent circuit at the AC input end of the LED lamp driver during the instantaneous power-off of the AC power is prevented, thereby achieving the purpose of anti-interference for the AC circuit.

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