EP4346337A1

EP4346337A1 - A high-voltage non-isolated led lamp low light elimination device and led lamp

Info

Publication number: EP4346337A1
Application number: EP23198830.4A
Authority: EP
Inventors: Weishu QIAN; Linji Wang; Pengyuan ZHAO; Yanhai LIN; Jianguo Dong; Minghai ZHAO
Original assignee: Ningbo Self Electronics Co Ltd; Self Electronics Germany GmbH
Current assignee: Ningbo Self Electronics Co Ltd; Self Electronics Germany GmbH
Priority date: 2022-09-30
Filing date: 2023-09-21
Publication date: 2024-04-03
Also published as: CN115551144A

Abstract

The invention discloses a high-voltage non-isolated LED lamp low light elimination device and an LED lamp. The high-voltage non-isolated LED lamp low light elimination device includes: a voltage conversion module , a dimming control module and a low light elimination module , wherein the voltage conversion module and The dimming control module is connected to convert high-voltage alternating current into direct current for power supply; the dimming control module is used to receive external control signals to control the on and off of the LED lamp; the low light elimination module , including a relay unit, is connected to the LED lamp between the positive electrode and the voltage conversion module , when the dimming control module controls the LED lamp to turn off, it also controls the relay unit to disconnect. The voltage to ground on the lamp board is close to zero, and the LED chip will not emit light. This solves the problem of high -voltage LED lamps "ghost light" phenomenon when turning off the lights and is low cost and effective .

Description

Technical field

The invention relates to the technical field of lamps, and in particular to a low-light/schimmer elimination device for high-voltage non-isolated LED lamps and an LED lamp.

Background technique

LED lamping has the characteristics of green energy saving and high efficiency. Generally, high-power lamps for top lighting use high-voltage non-isolated LED lamps, that is, the input voltage of the lamp panel is higher, higher than the safe voltage. Such lamps are more efficient than those driven by similar isolated power supplies. The lamps are taller and have added functions such as dimming control to make them more intelligent and energy-saving.
For high-voltage non-isolated LED lamps with intelligent control, when the control software is used to turn off the lights, the lamps are in standby mode and can be switched on and off regularly according to the internal program design at any time. Since the main power is not disconnected, through the internal rectification circuit, the line output to the LED lamp will have a voltage to the ground, which will cause a faint phenomenon, that is, a "ghost flame" phenomenon, which will affect the use effect.

Overview of the invention

Therefore, in order to overcome the phenomenon in the prior art that high-voltage non-isolated LEDs have trace amounts after the lights are turned off, the high-voltage non-isolated LED lamp microlight elimination device and LED lamp provided by embodiments of the present invention can eliminate this phenomenon.
In order to achieve the above objects, the present invention provides the following technical solutions:
The invention provides a low-light elimination device for high-voltage non-isolated LED lamps, which includes: a voltage conversion module 1, a dimming control module 2 and a low-light elimination module 3, wherein,

the voltage conversion module 1 is connected to the dimming control module 2 and is used to convert high-voltage alternating current into direct current for power supply;
the dimming control module 2 is used to receive external control signals to control the LED lamps to turn on and off;
the low light elimination module 3 includes a relay unit 31, which is connected between the positive electrode of the LED lamp and the voltage conversion module 1. When the dimming control module 2 controls the LED lamp to turn off, it also controls the relay unit 31 to disconnect.

In one embodiment, the relay unit 31 is also connected between the negative electrode of the LED lamp and the voltage conversion module 1.
In one embodiment, the low light elimination module 3 further includes: a high back-voltage diode D2, connected between the cathode of the LED lamp and the voltage conversion module 1.
In one embodiment, the dimming control module 2 includes: a signal receiving unit 21 and a microprocessor unit 22. The signal receiving unit 21 receives external control signals through wireless communication control. The microprocessor unit 22 responds to external control signals. The control signal controls the action of the low light elimination module 3 and the turning on and off of the LED lamp.
In one embodiment, the communication protocol supported by the signal receiving unit 21 includes one of Bluetooth, Zigbee or DALI protocols.
In one embodiment, the relay unit includes: relay K101 and a peripheral circuit. When the dimming control module 2 controls the LED lamp to turn off, it also controls the relay K101 to disconnect from the LED lamp.
In one embodiment, the peripheral circuit includes: diode D101, transistor Q1, first resistor R101 , second resistor R102 and a signal receiving pin, the signal receiving pin is connected to the microprocessor unit 22, so the first resistor R101 is connected in series with the transistor Q1 and the signal receiving pin respectively. The diode D101 is connected in parallel with the relay K101 and then connected with the second resistor R102 and the transistor Q1 respectively.
In one embodiment, the dimming control module 2 controls the relay K101 to connect to the LED lamp before controlling the LED lamp to turn on according to the external control signal.
The voltage conversion module 1 includes: a rectification and filtering unit 11 , an AD/DC unit 12 , and a DC/DC unit 13 .
An embodiment of the present invention also provides an LED lamp, including an LED lamp module and the high-voltage non-isolated LED lamp low light elimination device of any of the above embodiments.
The technical solution of the present invention has the following advantages:
The invention provides a high-voltage non-isolated LED lamp low light elimination device and an LED lamp, wherein the high-voltage non-isolated LED lamp low light elimination device includes: a voltage conversion module , a dimming control module and a low light elimination module , wherein the voltage conversion module is connected to the dimming control module, used to convert high-voltage alternating current into direct current for power supply; the dimming control module receives external control signals to control the on and off of the LED lamp; the low light elimination module, including a relay unit, is connected to the positive electrode of the LED lamp and the voltage conversion module, when the dimming control module controls the LED lamp to turn off, it also controls the relay unit to disconnect, the voltage to ground on the light board is close to zero, and the LED chip will not emit light, which solves the problem of shutting down high - voltage LED lamps . To eliminate the "ghost flame" phenomenon when lighting, the LED lamp integrates the above-mentioned high-voltage non-isolated LED lamp low-light elimination device, which is low-cost and effective.

Description of the drawings

In order to more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

FIG. 1 shows a schematic connection diagram of the functional modules of the low-light elimination device for high-voltage non-isolated LED lamps provided in an embodiment of the present invention;
FIG. 2 shows a schematic structural diagram of a specific embodiment of the low-light elimination device for high-voltage non-isolated LED lamps provided in the embodiment of the present invention;
FIG. 3 shows a schematic structural diagram of another specific embodiment of the low-light elimination device for high-voltage non-isolated LED lamps provided in the embodiment of the present invention;
FIG. 4 shows a diagram of another specific embodiment of the low-light elimination device for high-voltage non-isolated LED lamps provided in the embodiment of the present invention.

Detailed description of the embodiments

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The invention provides a high-voltage non-isolated LED lamp low light elimination device, as shown in Figure 1, including: a voltage conversion module 1 , a dimming control module 2 and a low light elimination module 3 , wherein the voltage conversion module 1 and the dimming control module 2 is connected and used to convert high-voltage alternating current into direct current for power supply; in the embodiment of the present invention, the voltage conversion module 1 includes: a rectification and filtering unit 11, an AD/DC unit 12, and a DC/DC unit 13 for converting high-voltage alternating current into direct current. After performing rectification, filtering, AC and DC voltage conversion and voltage conversion, an appropriate voltage is provided to the dimming control module 2 .
The dimming control module 2 is used to receive external control signals to control the turning on and off of LED lamps; in practical applications, the signal receiving unit 21 and the microprocessor unit 22, wherein the signal receiving unit 21 receives external signals through wireless communication control. control signal, the microprocessor unit 22 controls the action of the low light elimination module 3 and the turning on and off of the LED lamp according to the external control signal. The communication protocol supported by the signal receiving unit 21 includes one of the Bluetooth, Zigbee or DALI protocols, which is reasonably set according to the actual networking situation.
In one embodiment, the low light elimination module 3 includes a relay unit 31, which is connected between the positive electrode of the LED lamp and the voltage conversion module 1. When the dimming control module 2 controls the LED lamp to turn off, it also controls the relay unit 31 to disconnect. As shown in Figure 2, the relay unit 31 includes: a relay K101 and a peripheral circuit. When the dimming control module 2 controls the LED lamp to turn off, it also controls the relay to disconnect from the LED lamp. The peripheral circuit includes: diode D101, transistor Q1, first resistor R101, second resistor R102 and signal receiving pin ON/OFF. The signal receiving pin is connected to the microprocessor module. The first resistor R101 is respectively connected in series with the transistor Q1 and the signal receiving pin. The diode D101 is connected in parallel with the relay K101 and then connected to the second resistor R102 and the transistor Q1 respectively. This situation applies to the case where the LED lamp has a non-metal casing, and only needs to set a relay unit at the end connected to the positive electrode of the LED lamp.
For non-isolated, when the LED lamp has a high voltage output and the LED lamp has a metal shell, when the control software turns off the light, the output is output to the LED nodes: LED+, LED-. There is a voltage difference between the direct output and the grounded metal shell of the lamp, and the LED chip induced current generated on the LED is enough to excite the LED and produce a faint brightness. Therefore, the voltage difference of the lamp board and the induction ability to the ground must be reduced and cut off.
When the product space is large and cost is not considered, as shown in Figure 3, the voltage of the output line to the ground line is reduced when the lights are turned off. Two sets of switch relays are used to control the K 101 switch circuit. Before turning on the lights, the relay is closed and works normally. After turning off the light, the relay is disconnected to disconnect the high-end voltage LED+ and the low-end voltage LED- output at the same time to meet the requirement that the lamp will not dim.
In one embodiment, as shown in Figure 4, when the LED lamp has a metal casing, the low light elimination module 3 also includes: a high back-voltage diode D2, connected between the cathode of the LED lamp and the voltage conversion module 1 , reduces the voltage of the output line to ground when the lights are turned off. A single set of switch relay K101 switch control circuit is used. Before turning on the light, the relay is closed and works normally. After the light is turned off, the relay K101 is disconnected to disconnect the high-end voltage LED+. At the same time, the high back-voltage diode D2 blocks the low-end induced voltage LED- output when the light is turned off, thereby achieving the requirement that the light will not dim.
The high-voltage non-isolated LED lamp low light elimination device provided by the embodiment of the present invention solves the "ghost flame " phenomenon when the high-voltage LED lamp is turned off, has low cost and a good result.
An embodiment of the present invention also provides an LED lamp, which includes an LED lamp module and the high-voltage non-isolated LED lamp low light elimination device described in any of the above embodiments. That is, the high-voltage non-isolated LED lamp shimmer elimination device is integrated into the finished LED lamp, so that the LED lamp will not produce shimmer when in use.
Obviously, the above-mentioned embodiments are only examples for clear explanation and are not intended to limit the implementation. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. An exhaustive list of all implementations is neither necessary nor possible. The obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

A low-light elimination device for high-voltage non-isolated LED lamps, characterized by comprising: a voltage conversion module (1), a dimming control module (2) and a low-light elimination module (3), wherein,
the voltage conversion module (1) is connected to the dimming control module (2) and is used to convert high-voltage alternating current into direct current for power supply;

the dimming control module (2) is used to receive external control signals to control the LED lamps to turn on and off;

the low light elimination module (3) includes a relay unit (31), which is connected between the positive electrode of the LED lamp and the voltage conversion module (1), when the dimming control module (2) controls the LED lamp to turn off, it also controls the relay unit (31) to disconnect.
The high-voltage non-isolated LED lamp low light elimination device according to claim 1, characterized in that the relay unit (31) is also connected between the negative electrode of the LED lamp and the voltage conversion module (1).
The high-voltage non-isolated LED lamp low-light elimination device according to claim 1, characterized in that the low-light elimination module (3) further includes: a high back-voltage diode (D2) connected to the cathode of the LED lamp and between voltage conversion modules (1).
The high-voltage non-isolated LED lamp low light elimination device according to claim 1, characterized in that the dimming control module (2) includes: a signal receiving unit (21) and a microprocessor unit (22), wherein the signal receiving unit (21) receives external control signals through wireless communication control method, and the microprocessor unit (22) controls the action of the low light elimination module (3) and the turning on and off of the LED lamp according to the external control signals.
The high-voltage non-isolated LED lamp low light elimination device according to claim 4, characterized in that the communication protocol supported by the signal receiving unit (21) includes one of Bluetooth, Zigbee or DALI protocols.
The high-voltage non-isolated LED lamp low light elimination device according to claim 4, characterized in that the relay unit (31) includes: a relay (K101) and a peripheral circuit, when the dimming control module (2) controls the LED lamp to go out, the control relay (K101) is disconnected from the LED lamp at the same time.
The high-voltage non-isolated LED lamp low light elimination device according to claim 6, characterized in that the peripheral circuit includes: a diode (D101) , a transistor (Q1) , a first resistor (R101) , a second resistor ( R102) and a signal receiving pin, the signal receiving pin is connected to the microprocessor unit (22) , the first resistor (R101) is connected in series with the transistor (Q1) and the signal receiving pin respectively, the diode (D101) and the relay (K101) are connected in parallel and then connected to the second resistor (R102) and the transistor (Q1) respectively .
The high-voltage non-isolated LED lamp low light elimination device according to claim 6, characterized in that the dimming control module (2) controls the relay (K101) to connect the LED lamp before controlling the LED lamp to turn on according to an external control signal.
The high-voltage non-isolated LED lamp low light elimination device according to claim 1, characterized in that the voltage conversion module (1) includes: a rectification and filtering unit (11) , an AD/DC unit (12) , a DC/ DC unit (13) .
An LED lamp, characterized by comprising an LED lamp module and the high-voltage non-isolated LED lamp low light elimination device according to any one of claims 1-9.