CN111683436A - LED dimming driver directly controlled by common switch and control method - Google Patents
LED dimming driver directly controlled by common switch and control method Download PDFInfo
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- CN111683436A CN111683436A CN202010713045.9A CN202010713045A CN111683436A CN 111683436 A CN111683436 A CN 111683436A CN 202010713045 A CN202010713045 A CN 202010713045A CN 111683436 A CN111683436 A CN 111683436A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000003825 pressing Methods 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000004146 energy storage Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/34—Voltage stabilisation; Maintaining constant voltage
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an LED dimming driver directly controlled by a common switch and a control method, which are used for dimming an LED lamp. The invention adopts the common switch to control the LED dimming driver to realize the functions of gradually lightening and dimming the brightness of the lamp, switching the step brightness and the like, and the traditional lighting upgrading does not need to add wires; the invention has the beneficial effects that: the dimming controller can save equipment, pipelines, construction and maintenance cost, prolong the service life of the lamp, and improve the product grade and the user experience.
Description
The technical field is as follows:
the invention relates to the field of illumination, in particular to an LED dimming driver directly controlled by a common switch and a control method.
Background art:
with the wide application of LED lamps, in order to further improve user experience, generate gradual brightness or brightness change of different levels, derive multiple LED dimming drivers, and at present, there are mainly phase-cut drivers, 0/1-10V analog signal drivers, digital signals and other drivers, and it is necessary for the corresponding type of controllers to work cooperatively to complete the dimming task, where the front phase-cut controller has severe EMC electromagnetic interference, and the analog or digital signal controller needs to add a weak current circuit additionally.
Therefore, the existing LED dimming system has defects, or the equipment is troublesome, and the equipment, installation and maintenance costs are high.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
The invention content is as follows:
the present invention is directed to an LED dimming driver directly controlled by a common switch and a control method thereof, so as to overcome the above-mentioned drawbacks of the prior art.
In order to achieve the purpose, the invention provides an LED dimming driver directly controlled by a common switch, which comprises the common switch, the LED dimming driver and an LED lamp which are sequentially connected. The user realizes the change of the brightness of the LED lamp by operating the common switch, and the change of the brightness of the LED lamp comprises the change of gradually increasing and gradually decreasing, including the change of step brightness.
The common switch directly controls the LED dimming driver, and a traditional dimming controller (comprising a front phase-cutting or rear phase-cutting controller, an 0/1-10V analog controller and a digital controller) is omitted; and need not to increase extra communication line or other equipment facilities, be fit for newly-built or traditional illumination upgrading, succinct reliable practical.
The common switch comprises a strong-current double-control switch, a strong-current normally-closed self-resetting switch and a normally-closed relay; the common switch is in a conducting state at ordinary times, when a user presses the common switch, the common switch is switched off briefly, the LED dimming driver is powered off briefly, the LED dimming driver extracts the power-off pulse as an input signal, namely the common switch directly generates a control signal.
The LED dimming driver is connected with an energy storage capacitor C, and the energy storage capacitor C supplies power for the LED dimming driver during short power failure; a DC/DC converter may be provided in the LED dimming driver, and the energy storage capacitor C may precede or follow the DC/DC converter.
A control method of an LED dimming driver directly controlled by a common switch is provided, wherein a plurality of dimming modes are built in the LED dimming driver, and a user sets the dimming modes by the following two methods:
(1) a BCD coding switch is installed on the LED dimming driver to directly set a dimming mode, and when the switch is turned to 1-n, the dimming mode is directly set to 1-n;
(2) the dimming mode is set indirectly by a normal switch.
The setting method for indirectly setting the dimming mode by the common switch comprises the following steps:
(1) entering setting: continuously pressing the common switch for K times, and enabling the LED lamp to generate response flicker to indicate that the LED dimming driver enters a set state;
(2) formally setting: pressing a common switch S times, the LED lamp generates S confirmation short lights to indicate that the input of the user is accepted, wherein S represents a mode n;
(3) exiting the setting: and the LED lamp automatically exits after the last time of pressing the common switch for x seconds, the LED lamp is on for a long time, the setting work is finished, and the LED dimming driver automatically stores the dimming mode.
The plurality of dimming modes built in the LED dimming driver comprise:
mode 1: continuously pressing an on-off key, and circulating the brightness in three states of weak state, strong state and closed state;
mode 2: continuously pressing an on-off key, and circulating the brightness in four states of 'minimum', 'medium', 'maximum' and 'off';
the following modes are represented by being turned on once, indicated by being turned on, and then turned off once again, indicated by being turned off, and specifically as follows:
mode 3: on is instantly turned on, and off is instantly turned off;
mode 4: on-fades from v1 to m1 at t1 time, off-fades from m1 to off at t2 time;
mode 5: on-fades from v2 to m2 at t1 time, off-fades from m2 to off at t2 time;
mode 6: on-fades from v1 to m1 at t3 time, off-fades from m1 to off at t4 time;
mode 7: on-fades from v2 to m2 at t3 time, off-fades from m2 to off at t4 time;
the ranges of v and m are 0-100 percent;
the range of t 1-t 4 is 0-1000 seconds;
the above modes may be permuted.
Compared with the prior art, the invention has the following beneficial effects on one hand:
the invention cancels the dimming controller, namely, a front phase-cutting or back phase-cutting controller, an 0/1-10V analog controller or a digital controller are not needed; the device and the pipeline can be saved, the construction and maintenance cost can be saved, the service life of the lamp can be prolonged, and the product grade and the user experience degree can be improved.
Description of the drawings:
fig. 1 is a schematic diagram of an LED dimming driver directly controlled by a conventional switch according to the present invention;
FIG. 2 is a schematic diagram of a strong current type dual-control switch according to the present invention;
FIG. 3 is a schematic diagram of a normally closed relay according to the present invention;
FIG. 4 is a schematic diagram of a strong current type normally closed self-resetting switch according to the present invention;
FIG. 5 is a schematic diagram of a power supply circuit of the MCU built in the LED dimming driver according to the present invention;
FIG. 6 is a schematic diagram of the present invention for indirectly setting the dimming mode through a common switch;
FIG. 7 is a schematic diagram of the overall circuit design of the present invention;
FIG. 8 is a schematic flow chart illustrating a process of determining whether the LED dimming driver is powered on for the first time according to the present invention;
FIG. 9 is a flowchart illustrating the execution of a power-down thread according to the present invention.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 7, an LED dimming driver directly controlled by a common switch includes a common switch, an LED dimming driver and an LED lamp, which are sequentially connected.
The LED dimming driver comprises a rectifying circuit, a power-off sampling circuit, a mode setting switch, a D/A converter, an LED brightness control and drive, an energy storage capacitor C and a microprocessor MCU, and the LED dimming driver selects output types such as constant current, constant voltage, PWM and the like.
The rectifying circuit converts 110/220V alternating current into direct current, the direct current is used for LED brightness control and driving circuits through the DC/DC conversion circuit, simultaneously, Vcc power is generated to work of an MCU and the like, and the energy storage capacitor C can be connected in front of or behind the DC/DC conversion circuit.
In the specific embodiment of the invention, the traditional dimming controller, namely a front phase-cutting controller or a rear phase-cutting controller, an 0/1-10V analog controller and a digital controller are eliminated; the brightness change of the LED lamp is realized by a user through operating a common switch, a strong-current double-control switch, a strong-current normally-closed self-resetting switch or a normally-closed relay. The common switch is in a conducting state at ordinary times, and is switched off temporarily when a user presses the common switch, the LED dimming driver is powered off temporarily, and the driver extracts the power-off pulse as a control signal.
The energy storage capacitor C supplies power to the LED dimming driver during short power-off, so that the LED lamp does not flicker during the short power-off of the LED dimming driver;
the LED dimming driver is internally provided with 7 dimming modes, and a user can set the dimming modes in two methods;
(1) a BCD coded switch is installed on an LED dimming driver to directly set a dimming mode, and when the switch is turned to 1-7, the dimming mode is directly set to 1-7.
(2) The dimming mode is set indirectly through the normal switch.
In an embodiment of the present invention, the indirect dimming mode setting method includes:
(1) entering setting: continuously pressing the user switch for 6 times, and enabling the lamp to generate response flicker to indicate that the driver enters a setting state;
(2) formally setting: if the user switch is pressed 4 times, the lamp generates 4 confirmation short lights, which indicate that the user input is accepted, and the user selects the mode 4.
(3) Exiting the setting: the system automatically exits the setting state after the user switch is pressed for 10 seconds for the last time, the lamp is on for a long time, the setting work is finished, the dimming mode 4 is automatically stored in the nonvolatile storage by the MCU, and the driver is kept in memory when power is lost, namely, the driver is used for a long time after being set again; the user pressing the switch will then be performed according to the mode 4 content.
In a specific embodiment of the present invention, the LED dimming driver has 7 built-in dimming modes:
mode 1: continuously pressing an on-off key, and circulating the brightness in three states of weak state, strong state and closed state;
mode 2: continuously pressing an on-off key, and circulating the brightness in four states of 'minimum', 'medium', 'maximum' and 'off';
the following modes are cycled according to the following steps, namely, according to the following steps, wherein the steps are represented by on, according to the following steps, the steps are represented by off, and the steps are repeated:
mode 3: on is instantly turned on, and off is instantly turned off;
mode 4: on-fade from 15% to 100% in 3 seconds, off-fade from 100% to off in 5 seconds;
mode 5: on-fade from 0% to 50% in 3 seconds, off-fade from 50% to off in 5 seconds;
mode 6: on-instant on, off-fade from 100% off in 20 seconds;
mode 7: on-off-immediately, fade from 5% to 80% in 20 seconds;
in the specific embodiment of the invention, due to the instant power-off of the switch, the MCU of the driver microprocessor is powered off and reset, so that the work is abnormal; therefore, the power supply circuit is accessed at the MCU, and the specific method is as follows: the power Vcc supplies power to the MCU through the diode D and the capacitor C2, and due to the existence of the diode D, the capacitor C2 can not supply power to other circuits and only supplies power to the MCU to work, so that the discharge time is greatly prolonged, and the normal work of the MCU is ensured.
In the specific embodiment of the invention, because the user operates the switch in a ping-pong switch mode, namely, the switch is turned on once and then turned off once again, namely, the current state is the last reverse state, if the power is cut off or tripped in the turn-off state, the switch is turned on after the incoming call, and the conventional principle is violated; in the other condition, when a plurality of drivers are partially opened, the drivers are powered off or tripped, and after the power is supplied, the partially opened drivers are partially closed and are disorderly; therefore, the lamps need to be turned off uniformly after power failure or tripping and power restoration; however, the power failure or trip and normal operation essentially all involve powering off the driver, and therefore the MCU is required to be able to determine the power failure after being powered on again, and the two cases are as follows:
a. when power is off or tripping is performed, the LED dimming driver has long power-off time, the capacitor C2 loses power, and the data in the RAM area of the microprocessor MCU disappear immediately;
b. when the switch is normally operated, although the LED dimming driver is also powered off, the time is short, and the RAM area still keeps the power-on feature code due to the existence of the capacitor C2, which is implemented as follows according to 0x55ABCD as an example:
1) in a program, defining a power-on feature code of a plurality of bytes in an RAM area in an MCU, and then creating a first power-on mark to provide information for a power-off thread;
2) after the MCU is powered on, firstly reading a power-on feature code:
if the number of the cases is a, the reading result is a random number which is not exactly 0x55ABCD, so that the situation can be judged to be the first power-on, the conclusion is stored in a first power-on mark, and meanwhile, a power-on feature code is initialized; if the situation is b, the reading result is 0x55ABCD, so it can be determined that the power is not powered on for the first time, and the result is saved to the first power-on flag, and the flow is shown in fig. 8:
in the power-off thread, judging a first power-on mark, if the first power-on mark is True, turning off the lamp, setting the first power-on mark as False, and ensuring that a forced turn-off program is not executed any more next time; if False, the inverse procedure is executed, and the flow is shown in fig. 9:
although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An LED dimming driver directly controlled by a common switch, comprising: the LED dimming system comprises a common switch, an LED dimming driver and an LED lamp which are connected in sequence, wherein the brightness change of the LED lamp is operated through the common switch.
2. An LED dimming driver directly controlled by a common switch as claimed in claim 1, wherein: the common switch directly controls the LED dimming driver.
3. An LED dimming driver directly controlled by a common switch as claimed in claim 1, wherein: the common switch adopts a strong-current double-control switch, a strong-current normally-closed self-resetting switch or a normally-closed relay.
4. An LED dimming driver directly controlled by a common switch as claimed in claim 1, wherein: and the LED dimming driver is connected with an energy storage capacitor C, and the energy storage capacitor C supplies power for the LED dimming driver during short-time power failure.
5. A control method of an LED dimming driver directly controlled by a common switch is characterized in that: the LED dimming driver is internally provided with a plurality of dimming modes, and a user sets the dimming modes by the following two methods:
(1) a BCD coding switch is installed on the LED dimming driver to directly set a dimming mode, and when the switch is turned to 1-n, the dimming mode is directly set to 1-n;
(2) the dimming mode is set indirectly by a normal switch.
6. The method of claim 5, wherein the LED dimming driver directly controlled by the common switch comprises: the setting method for indirectly setting the dimming mode by the common switch comprises the following steps:
(1) entering setting: continuously pressing the common switch for K times, and enabling the LED lamp to generate response flicker to indicate that the LED dimming driver enters a set state;
(2) formally setting: pressing a common switch S times, the LED lamp generates S confirmation short lights to indicate that the input of the user is accepted, wherein S represents a mode n;
(3) exiting the setting: and the LED lamp automatically exits after the last time of pressing the common switch for x seconds, the LED lamp is on for a long time, the setting work is finished, and the LED dimming driver automatically stores the dimming mode.
7. The method of claim 5, wherein the LED dimming driver directly controlled by the common switch comprises: the plurality of dimming modes built in the LED dimming driver comprise:
mode 1: continuously pressing an on-off key, and circulating the brightness in three states of weak state, strong state and closed state;
mode 2: continuously pressing an on-off key, and circulating the brightness in four states of 'minimum', 'medium', 'maximum' and 'off';
the following modes are represented by being turned on once, indicated by being turned on, and then turned off once again, indicated by being turned off, and specifically as follows:
mode 3: on is instantly turned on, and off is instantly turned off;
mode 4: on-fades from v1 to m1 at t1 time, off-fades from m1 to off at t2 time;
mode 5: on-fades from v2 to m2 at t1 time, off-fades from m2 to off at t2 time;
mode 6: on-fades from v1 to m1 at t3 time, off-fades from m1 to off at t4 time;
mode 7: on-fades from v2 to m2 at t3 time, off-fades from m2 to off at t4 time;
the ranges of v and m are 0-100 percent;
the range of t 1-t 4 is 0-1000 seconds.
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