CN111132420B

CN111132420B - A compensation circuit for the gap switch control signal of LED lamp

Info

Publication number: CN111132420B
Application number: CN202010028901.7A
Authority: CN
Inventors: 赵龙; 黎辉
Original assignee: Individual
Current assignee: Shenzhen Kaili Technology Co ltd
Priority date: 2020-01-12
Filing date: 2020-01-12
Publication date: 2025-06-20
Anticipated expiration: 2040-01-12
Also published as: CN111132420A

Abstract

The invention discloses a compensating circuit of a gap switch control signal of an LED lamp, which comprises a gap switch signal detection and control circuit, an alternating current full-wave rectifier bridge circuit and an LED lamp driver, wherein the gap switch signal detection and control circuit and the alternating current full-wave rectifier bridge circuit are connected in parallel with the input end of an alternating current loop, and the output end of the alternating current full-wave rectifier bridge circuit is electrically connected with the alternating current input end of the LED lamp driver. According to the invention, the problem that the gap switch signal detection and control circuit is interfered to cause unreliable phenomenon due to the reverse discharge effect of the capacitive equivalent circuit at the input end of the LED lamp driver during the AC power-off gap when the gap switch signal mode is adopted to switch the LED lamp is solved, and the reliability of the gap switch signal detection is greatly improved.

Description

Compensation circuit for gap switch control signal of LED lamp

Technical Field

The invention relates to an intelligent lighting control circuit of an LED lamp, in particular to a compensation circuit of a gap switch control signal of the LED lamp.

Background

At present, most of wireless remote control and voice control LED lamps can normally work only when a wall switch based on an alternating current loop is in a long-term short-circuit state, so that manual switch control operation of the wall switch on the LED lamps cannot be realized, and the contradiction can be solved only by adopting a gap type uninterrupted switch mode with instantaneous power-off and automatic reset. However, when the gap switch signal mode is adopted to switch and control the LED lamp, the interference to the gap switch signal detection and control circuit causes unreliable phenomenon due to the reverse discharge effect generated by the capacitive equivalent circuit at the input end of the LED lamp driver in the period of alternating current power-off gap.

Disclosure of Invention

The invention fully utilizes the unidirectional conduction characteristic of the alternating current full-wave rectifier bridge circuit, prevents the reverse discharge effect generated by the capacitive equivalent circuit at the input end of the LED lamp driver during the instant power-off period of the alternating current, and greatly improves the reliability of gap switch signal detection.

The technical scheme is that the compensating circuit of the gap switch control signal of the LED lamp comprises a gap switch signal detection and control circuit, an alternating current full-wave rectifier bridge circuit and an LED lamp driver, wherein the gap switch signal detection and control circuit and the alternating current full-wave rectifier bridge circuit are connected in parallel to the input end of an alternating current loop, and the output end of the alternating current full-wave rectifier bridge circuit is electrically connected with the alternating current input end of the LED lamp driver.

When a gap switch signal generated by the gap of the instant power-off of the alternating current circuit passes through the gap switch signal detection and control circuit, the unidirectional conduction characteristic of the alternating current full-wave rectifier bridge circuit prevents the reverse discharge effect generated by the capacitive equivalent circuit at the input end of the LED lamp driver during the instant power-off of the alternating current.

In one embodiment, the LED lamp driver further comprises an uninterrupted switch, wherein the two output poles A and B of the uninterrupted switch are in a short circuit state and are connected with the input end loop of the gap switch signal detection and control circuit, when the switch contact of the uninterrupted switch is switched from the pole A to the pole B, an instant power-off gap appears, at the moment, the capacitive equivalent circuit of the input end of the LED lamp driver generates reverse discharge during instant power-off of alternating current, and the unidirectional conduction characteristic of the alternating current full-wave rectifier bridge circuit prevents the unreliable phenomenon caused by the interference of the reverse discharge generated by the capacitive equivalent circuit of the input end of the LED lamp driver to the gap switch signal detection and control circuit during instant power-off of alternating current, so that the purpose of anti-interference is achieved.

The invention has the beneficial effects that the unreliable phenomenon caused by interference to the gap switch signal detection and control circuit due to the reverse discharge effect of the capacitive equivalent circuit at the input end of the LED lamp driver during the AC power-off gap when the gap switch signal mode is adopted to switch the LED lamp is solved, and the reliability of the gap switch signal detection is greatly improved.

Drawings

Fig. 1 is a schematic block diagram of the system of the present invention.

Fig. 2 is a schematic diagram of an embodiment of the present invention.

FIG. 3 is a schematic diagram of a second embodiment of the present invention.

FIG. 4 is a third schematic diagram of an embodiment of the present invention.

In the figure, a gap switch signal detection and control circuit 1, an alternating current full-wave rectifier bridge circuit 2, an LED lamp driver 3 and an uninterrupted switch 4 are shown.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Referring to fig. 1, a compensation circuit for gap switch control signals 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, where the gap switch signal detection and control circuit 1 and the ac full-wave rectifier bridge circuit 2 are connected in parallel to an ac loop input end, and an output end of the ac full-wave rectifier bridge circuit 2 is electrically connected with an ac input end of the LED lamp driver 3.

When the gap switch signal generated by the instant power-off gap of the alternating current loop passes through the gap switch signal detection and control circuit 1, the unidirectional conduction characteristic of the alternating current full-wave rectifier bridge circuit 2 prevents the reverse discharge effect generated by the capacitive equivalent circuit at the input end of the LED lamp driver 3 during the instant power-off period of the alternating current.

See one embodiment shown in fig. 2, 3, 4, comprising a gap switch signal detection and control circuit 1, an alternating current 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 circuit state and are connected with the input end loop of the gap switch signal detection and control circuit 1, when the switch contact of the uninterruptible switch 4 is switched from the pole a to the pole B, an instant power-off gap appears, at this time, the capacitive equivalent circuit of the input end of the LED lamp driver 3 generates reverse discharge during instant power-off of the alternating current, but the unidirectional conduction characteristic of the alternating current full-wave rectifier bridge circuit 2 prevents the reverse discharge generated by the capacitive equivalent circuit of the input end of the LED lamp driver 3 during instant power-off of the alternating current from causing unreliable phenomenon to the interference generated by the gap switch signal detection and control circuit 1, so as to achieve the purpose of anti-interference.

The foregoing detailed description of the embodiments of the invention will be presented to those of ordinary skill in the art in view of the teachings of the present invention as applied to its embodiments and its application and should not be construed as limiting the invention.

Claims

1. A compensation circuit for a 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 and the AC full-wave rectifier bridge circuit are connected in parallel to an 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 momentary power failure gap in 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 reverse discharge effect generated by the capacitive equivalent circuit at the input end of the LED lamp driver during the momentary power failure of the AC circuit.

2. According to claim 1, a compensation circuit for a gap switch control signal of an LED lamp is characterized in that it also includes an uninterruptible switch, wherein the two output poles A and B of the uninterruptible switch are in a short-circuited state and connected to the input end loop of the gap switch signal detection and control circuit. When the switch contact of the uninterruptible switch switches from pole A to pole B, a momentary power-off gap occurs. At this time, the capacitive equivalent circuit of the input end of the LED lamp driver generates reverse discharge during the momentary power failure 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 of the AC input end of the LED lamp driver during the momentary power failure of the AC power is prevented, thereby achieving the purpose of anti-interference to the AC circuit.