Technical field
[0001] 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
[0002] 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.
[0003] 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
[0004] 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.
[0005] 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.
[0006] In one embodiment, the relay unit 31 is also connected between the negative electrode
of the LED lamp and the voltage conversion module 1.
[0007] 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.
[0008] 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.
[0009] In one embodiment, the communication protocol supported by the signal receiving unit
21 includes one of Bluetooth, Zigbee or DALI protocols.
[0010] 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.
[0011] 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.
[0012] 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.
[0013] The voltage conversion module 1 includes: a rectification and filtering unit 11 ,
an AD/DC unit 12 , and a DC/DC unit 13 .
[0014] 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.
[0015] 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
[0016] 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
[0017] 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.
[0018] 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.
[0019] 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 .
[0020] 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.
[0021] 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.
[0022] 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.
[0023] 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.
[0024] 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.
[0025] 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.
[0026] 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.
[0027] 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.
1. 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.
2. 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).
3. 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).
4. 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.
5. 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.
6. 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.
7. 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 .
8. 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.
9. 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) .
10. 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.