CN114040536A - LED power supply with constant luminous flux and working method - Google Patents
LED power supply with constant luminous flux and working method Download PDFInfo
- Publication number
- CN114040536A CN114040536A CN202111369482.4A CN202111369482A CN114040536A CN 114040536 A CN114040536 A CN 114040536A CN 202111369482 A CN202111369482 A CN 202111369482A CN 114040536 A CN114040536 A CN 114040536A
- Authority
- CN
- China
- Prior art keywords
- output end
- signal output
- power supply
- mcu
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000004907 flux Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 5
- 238000004891 communication Methods 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 6
- 238000013500 data storage Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000007717 exclusion Effects 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 241001465382 Physalis alkekengi Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
-
- 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]
- H05B45/20—Controlling the colour 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
- 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
-
- 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
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an LED power supply with constant luminous flux, wherein the output end of an AC/DC power supply is respectively and electrically connected with the input end of a BUCK driving circuit and the input end of an auxiliary power supply module; a first signal output end of the MCU micro control unit is electrically connected with a signal input end of the BUCK driving circuit, and a second signal output end and a third signal output end of the MCU micro control unit are respectively electrically connected with a signal output end of the BUCK driving circuit; the output end of the BUCK driving circuit is electrically connected with a signal input end of a MOSFET1, a third signal output end is electrically connected with a signal input end of a MOSFET1, a signal input end of the MOSFET2 is electrically connected with a second signal output end of the MCU, and a signal input end of the MOSFET2 is electrically connected between the output end of the BUCK driving circuit and a connection position of the signal input end of the MOSFET 1. The invention has the advantages of capability of simulating two paths of independent outputs, capability of configuring power supply parameters, capability of being compatible with various dimming control signals and low cost.
Description
Technical Field
The invention relates to the field of LED power supplies, in particular to an LED power supply with constant luminous flux.
Background
Along with the gradual popularization of LED lamps, the color temperature adjustment of the LED lamps is widely concerned, and the mainstream color temperature dimming power supply in the market at present has two schemes:
in the first scheme, as shown in fig. 1, 2 BUCK driving circuits are adopted, the brightness and color temperature proportion is calculated through an MCU (microprogrammed control unit), and two paths of PWM (pulse-width modulation) signals are output to respectively control the output current of each path. By adopting the scheme, the two paths of output currents have certain errors, and in order to ensure the minimum error of the two paths of output currents, the MCU micro-control unit is required to finish more complex current correction and calculation to ensure the accuracy of the output currents and the color temperature, and the MCU micro-control unit with higher performance is required in the scheme. The scheme has the advantages that the MCU micro-control unit is independently controlled, each path of output current can be independently controlled, power supply parameters can be configured, various dimming control signals can be compatible, and the extended function is convenient. However, this scheme requires two BUCK driving circuits, and in order to ensure current accuracy, an MCU micro-control unit is required to complete complex current correction and calculation, which has high requirements on the performance of the MCU micro-control unit and high product cost.
In the second scheme, as shown in fig. 2, 1 BUCK driving circuit is adopted, two MOSFETs are added at the output end of the BUCK driving circuit, and two paths of PWM signals are adopted for control, wherein one path of PWM controls dimming brightness, and the other path of PWM controls color temperature ratio. The PWM signal with the color temperature ratio drives a first MOSFET in the two MOSFETs, and an inverter circuit is used for inverting the PWM signal with the color temperature ratio and then driving the other MOSFET. The scheme is mostly controlled by PWM output by modules such as Bluetooth, Zigbee and WIFI. According to the scheme, only 1 independent BUCK circuit is needed, the third-party module is used for outputting PWM control, an additional MCU micro-control unit is not needed, and the product cost is low. However, two paths of independent control cannot be achieved, output current cannot be configured, and the function expansion is inconvenient.
Disclosure of Invention
The invention aims to provide an LED power supply with constant luminous flux, which has the advantages of capability of simulating two paths of independent outputs, capability of configuring power supply parameters, compatibility with various dimming control signals, convenience in function expansion of an MCU micro-control unit and low cost.
The technical purpose of the invention is realized by the following technical scheme:
a constant luminous flux LED power supply comprises an AC/DC power supply, an auxiliary power supply module, a BUCK driving circuit, an MCU (micro control unit), a MOSFET1 and a MOSFET 2;
the output end of the AC/DC power supply is electrically connected with the input end of the BUCK driving circuit and the input end of the auxiliary power supply module respectively, and the input end of the MCU micro control unit is electrically connected with the output end of the auxiliary power supply module;
the signal output end of the MCU comprises a first signal output end, a second signal output end and a third signal output end, the output modes of the second signal output end and the third signal output end are mutually exclusive, the first signal output end is electrically connected with the signal input end of the BUCK driving circuit, and the second signal output end and the third signal output end are respectively electrically connected with the signal output end of the BUCK driving circuit;
the output electric connection of BUCK drive circuit has MOSFET 1's signal input part, MCU microcontrol unit's third signal output part and MOSFET 1's signal input part electric connection, MOSFET 2's signal input part and MCU microcontrol unit's second signal output part electric connection, MOSFET 2's signal input part electric connection is between BUCK drive circuit's output and MOSFET 1's signal input part's junction.
The preferred scheme is as follows:
preferably: the AC/DC power supply inputs AC alternating current and outputs DC direct current. The LED cannot directly use a power supply as a conventional light source, and needs to be converted into a direct current to operate.
Preferably: the output of the BUCK driving circuit comprises a CH + channel and a CH 1-channel, and the MOSFET1 and the MCU are both electrically connected to the CH 1-channel.
Preferably: the output of the MOSFET2 is the CH 2-channel.
A working method of an LED power supply with constant luminous flux comprises the following specific operation steps,
s1, the LED power supply starts to work, each function module in the MCU is initialized, and the MCU reads configuration parameters through the data storage module;
s2, collecting color temperature dimming signals by the MCU, and calculating a color temperature proportion through the color temperature dimming signals;
s3, calculating and configuring the total output current by the MCU according to the color temperature proportion;
s4, calculating the brightness output proportion by the MCU according to the configured total output current;
s5, the MCU calculates the output duty ratio of the first signal output end, the second signal output end and the third signal output end;
s6, calculating output duty ratio values of the first signal output end, the second signal output end and the third signal output end according to the MCU, and controlling the MCU to output corresponding duty ratios;
s7, checking whether a communication configuration command is received;
s8, if the reception is finished, processing according to the communication configuration command, then recycling steps S2-S7, if the reception is not finished, directly recycling steps S2-S7.
In summary, the invention has an independent MCU micro-control unit, and the output current is controlled by calculating the ratio of brightness and color temperature by the MCU micro-control unit, so as to ensure high accuracy of the output current. The LED dimming control circuit can simulate two paths of independent outputs, can configure power supply parameters, can be compatible with various dimming control signals, has convenient MCU expansion function, is low in cost when using 1 BUCK driving circuit product, can configure the output current corresponding to each channel according to the LED luminous flux parameters of a lamp to achieve the constant luminous flux effect, can be compatible with different dimming signals by expanding the MCU program function, can realize the control of the output current of CH1 by the dimming signal and control of the output current of CH2 by the dimming temperature signal.
Drawings
FIG. 1 is a schematic diagram of a first aspect of the background art of the embodiments;
FIG. 2 is a schematic diagram of a second aspect of the background art of the embodiments;
FIG. 3 is a schematic diagram of the operation of embodiment 1;
FIG. 4 is a schematic diagram of the operation of embodiment 2;
fig. 5 is a flowchart of the operation of the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1:
as shown in fig. 3, a constant luminous flux LED power supply includes an AC/DC power supply, an auxiliary power supply module, a BUCK driving circuit, an MCU micro-control unit, a MOSFET1, a MOSFET 2; the MCU micro control unit can realize mutual exclusion output.
Because LED lamps and lanterns can not directly use power supply like traditional light source, need to supply power supply transform direct current into and just can work, consequently AC/DC's input alternating current power supply, AC/DC's output direct current power supply, AC/DC power supply's output respectively with BUCK drive circuit's input, auxiliary power module's input electric connection, AC/DC power supply provides the direct current for BUCK drive circuit, MCU microcontrol unit's input and auxiliary power module's output electric connection, auxiliary power module provides MCU microcontrol unit with MCU microcontrol unit assorted operating voltage.
The signal output end of the MCU micro control unit comprises a first signal output end, a second signal output end and a third signal output end, the output modes of the second signal output end and the third signal output end are mutually exclusive, the first signal output end is electrically connected with the signal input end of the BUCK driving circuit, the first signal output end outputs a PWM1 signal to the BUCK driving circuit to realize the control of the output total current of the BUCK driving circuit, the output of the BUCK driving circuit comprises a CH + channel and a CH 1-channel, and the second signal output end and the third signal output end are respectively electrically connected with the CH 1-channel of the signal output end of the BUCK driving circuit;
the output end CH 1-channel of the BUCK driving circuit is electrically connected with a signal input end of a MOSFET1, a third signal output end of the MCU micro control unit is electrically connected with a signal input end of a MOSFET1, PWM2N is transmitted into the MOSFET1, a signal input end of the MOSFET2 is electrically connected with a second signal output end of the MCU micro control unit, a signal input end of the MOSFET2 is electrically connected between a connection position of a CH 1-channel of the output end of the BUCK driving circuit and the signal input end of the MOSFET1, an output end of the MOSFET2 is a CH 2-channel, the second signal output end of the MCU micro control unit outputs a PWM2 signal to the MOSFET2, and PWM2 and PWM2N are respectively output from the second signal output end and the third signal output end of the MCU micro control circuit in a mutually exclusive mode, so that the effect of controlling the output end of the BUCK driving circuit is achieved.
The MCU micro-control unit comprises a dimming signal acquisition module, a communication interface module, a data storage module, a data calculation module and a PWM module, after the MCU micro-control unit is electrified, configuration parameters are read from a data storage area, then the dimming signal acquisition module acquires dimming signals firstly, then the data calculation module calculates brightness duty ratio values and color temperature duty ratio values which are correspondingly output according to the dimming signals and cold color and warm color channel configuration parameters, the PWM1 is controlled to output according to the calculated brightness duty ratio values, the mutually exclusive output of PWM2 and PWM2N is controlled according to the calculated color temperature duty ratio values, and finally whether the communication interface module receives a communication configuration command is checked, if the configuration command is received, a configuration command function is executed, and PWM1 signals, PWM2 signals and PWM2N signals are respectively sent out through the PWM module.
Example 2:
as shown in fig. 4, in the constant luminous flux LED power supply, the MCU micro-control unit cannot achieve mutual exclusion output, and a reverse circuit is disposed at the electrical connection between the signal input terminal of the MOSFET2 and the second signal output terminal of the MCU micro-control unit to achieve mutual exclusion output.
A working method of a constant luminous flux LED power supply comprises the following steps:
s1, the LED power supply starts to work, each function module in the MCU is initialized, and the data calculation module reads configuration parameters through the data storage module;
s2, the dimming signal acquisition module acquires color temperature dimming signals, the data calculation module calculates a color temperature proportion through the color temperature dimming signals, and the calculation formula is as follows, wherein the color temperature proportion is the current color temperature dimming signal/the total color temperature dimming signal;
s3, the data calculation module calculates the configured total output current according to the color temperature proportion, and the calculation formula is as follows, wherein the configured total output current is CH1 configured current and color temperature proportion + CH2 configured current (1-color temperature proportion);
s4, calculating a luminance output ratio by the data calculating module according to the configured total output current, wherein the luminance output ratio is (current luminance brightness adjusting signal/total luminance signal) × (configured total output current/total output current of the BUCK driving circuit);
s5, calculating the PWM1, PWM2 and PWM2N output duty ratio values by the data calculation module, wherein the calculation formula is as follows, the PWM1 output duty ratio is the brightness output ratio, PWM1 total duty ratio, the PWM2 output duty ratio is the color temperature ratio, PWM2 total duty ratio, and the PWM2N output duty ratio is the PWM2 total duty ratio-PWM 2 output duty ratio;
s6, calculating the output duty ratio values of PWM1, PWM2 and PWM2N according to the data calculation module, and controlling the PWM module to output corresponding duty ratios;
s7, checking whether the communication interface module receives the communication configuration command;
s8, if the reception is finished, processing according to the communication configuration command, then recycling steps S2-S7, if the reception is not finished, directly recycling steps S2-S7.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (5)
1. A constant luminous flux LED power supply, characterized by: the device comprises an AC/DC power supply, an auxiliary power supply module, a BUCK driving circuit, an MCU (microprogrammed control unit), a MOSFET1 and a MOSFET 2;
the output end of the AC/DC power supply is electrically connected with the input end of the BUCK driving circuit and the input end of the auxiliary power supply module respectively, and the input end of the MCU micro control unit is electrically connected with the output end of the auxiliary power supply module;
the signal output end of the MCU comprises a first signal output end, a second signal output end and a third signal output end, the output modes of the second signal output end and the third signal output end are mutually exclusive, the first signal output end is electrically connected with the signal input end of the BUCK driving circuit, and the second signal output end and the third signal output end are respectively electrically connected with the signal output end of the BUCK driving circuit;
the output electric connection of BUCK drive circuit has MOSFET 1's signal input part, MCU microcontrol unit's third signal output part and MOSFET 1's signal input part electric connection, MOSFET 2's signal input part and MCU microcontrol unit's second signal output part electric connection, MOSFET 2's signal input part electric connection is between BUCK drive circuit's output and MOSFET 1's signal input part's junction.
2. A constant luminous flux LED power supply as defined in claim 1, wherein: the AC/DC power supply inputs AC alternating current and outputs DC direct current.
3. A constant luminous flux LED power supply as defined in claim 1, wherein: the output of the BUCK driving circuit comprises a CH + channel and a CH 1-channel, and the MOSFET1 and the MCU are both electrically connected to the CH 1-channel.
4. A constant luminous flux LED power supply as defined in claim 1, wherein: the output of the MOSFET2 is the CH 2-channel.
5. A working method of an LED power supply with constant luminous flux is characterized in that: the specific operation steps are as follows,
s1, the LED power supply starts to work, each function module in the MCU is initialized, and the MCU reads configuration parameters through the data storage module;
s2, collecting color temperature dimming signals by the MCU, and calculating a color temperature proportion through the color temperature dimming signals;
s3, calculating and configuring the total output current by the MCU according to the color temperature proportion;
s4, calculating the brightness output proportion by the MCU according to the configured total output current;
s5, the MCU calculates the output duty ratio of the first signal output end, the second signal output end and the third signal output end;
s6, calculating output duty ratio values of the first signal output end, the second signal output end and the third signal output end according to the MCU, and controlling the MCU to output corresponding duty ratios;
s7, checking whether a communication configuration command is received;
s8, if the reception is finished, processing according to the communication configuration command, then recycling steps S2-S7, if the reception is not finished, directly recycling steps S2-S7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111369482.4A CN114040536A (en) | 2021-11-15 | 2021-11-15 | LED power supply with constant luminous flux and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111369482.4A CN114040536A (en) | 2021-11-15 | 2021-11-15 | LED power supply with constant luminous flux and working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114040536A true CN114040536A (en) | 2022-02-11 |
Family
ID=80138036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111369482.4A Pending CN114040536A (en) | 2021-11-15 | 2021-11-15 | LED power supply with constant luminous flux and working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114040536A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745825A (en) * | 2022-03-31 | 2022-07-12 | 歌尔光学科技有限公司 | LED control system and electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559934A (en) * | 2016-11-14 | 2017-04-05 | 中车青岛四方机车车辆股份有限公司 | The control method of rail vehicle lighting system, device, system and rail vehicle |
| CN206481478U (en) * | 2017-02-24 | 2017-09-08 | 合肥本山电子科技有限公司 | A kind of LED eye-protecting lamps with toning dimming function |
| US20180027626A1 (en) * | 2015-12-29 | 2018-01-25 | Sengled Co., Ltd. | Color-temperature adjustable led lighting device and method for adjusting color temperature of led lighting device |
| CN111918446A (en) * | 2020-09-10 | 2020-11-10 | 浙江高圣科技有限公司 | Color changing temperature lamp |
| US20210068227A1 (en) * | 2017-09-06 | 2021-03-04 | Shenzhen Sendis Semiconductor Co., Ltd. | Apparatus and method for simultaneously adjusting brightness and color temperature, and led lamp |
| CN216600133U (en) * | 2021-11-15 | 2022-05-24 | 无锡安特源科技股份有限公司 | LED power supply with constant luminous flux |
-
2021
- 2021-11-15 CN CN202111369482.4A patent/CN114040536A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180027626A1 (en) * | 2015-12-29 | 2018-01-25 | Sengled Co., Ltd. | Color-temperature adjustable led lighting device and method for adjusting color temperature of led lighting device |
| CN106559934A (en) * | 2016-11-14 | 2017-04-05 | 中车青岛四方机车车辆股份有限公司 | The control method of rail vehicle lighting system, device, system and rail vehicle |
| CN206481478U (en) * | 2017-02-24 | 2017-09-08 | 合肥本山电子科技有限公司 | A kind of LED eye-protecting lamps with toning dimming function |
| US20210068227A1 (en) * | 2017-09-06 | 2021-03-04 | Shenzhen Sendis Semiconductor Co., Ltd. | Apparatus and method for simultaneously adjusting brightness and color temperature, and led lamp |
| CN111918446A (en) * | 2020-09-10 | 2020-11-10 | 浙江高圣科技有限公司 | Color changing temperature lamp |
| CN216600133U (en) * | 2021-11-15 | 2022-05-24 | 无锡安特源科技股份有限公司 | LED power supply with constant luminous flux |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745825A (en) * | 2022-03-31 | 2022-07-12 | 歌尔光学科技有限公司 | LED control system and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3768046B1 (en) | Circuit for linearly driving led illumination based on mcu-controlled color temperature switching | |
| CN103997812B (en) | LED drive device and LED light device | |
| CN204244540U (en) | Light-emitting element power supply circuit with dimming function and its control circuit | |
| CN104902653A (en) | LED constant-voltage dimming power supply and LED lamp dimming system | |
| KR20170117372A (en) | Current splitter for led lighting system | |
| TWI578843B (en) | Driving circuit of light-emitting diodes | |
| CN103561527B (en) | A kind of dual-function LED drive circuit | |
| KR102577150B1 (en) | OLED light source driving control circuit and OLED lamp | |
| CN108667289B (en) | Power supply device and power supply method | |
| CN103249220A (en) | Semiconductor light emitting element drive device and lighting fixture with the same | |
| CN216600133U (en) | LED power supply with constant luminous flux | |
| CN111918455A (en) | LED lamp with identification and self-adaptive dimming driving system | |
| CN114040536A (en) | LED power supply with constant luminous flux and working method | |
| CN103561528A (en) | LED power source platform capable of integrating various dimming ways | |
| CN108200691A (en) | A kind of LED PAR lamps driving circuit and LED PAR lamps | |
| CN111505975A (en) | Home automation electronic controls with two wires | |
| CN215453338U (en) | Lighting control system | |
| CN213403577U (en) | LED control equipment and LED lighting equipment | |
| CN109302777B (en) | LED dimming device and dimming system | |
| CN204697340U (en) | Universal wireless light modulation toning LED driver | |
| JP2018133308A (en) | Lighting apparatus | |
| CN111083826A (en) | LED drive circuit capable of adjusting brightness and color | |
| CN110740541A (en) | Circuit for adjusting light and color temperature | |
| CN213305808U (en) | Split type dial switch color temperature regulator and LED lamp control system | |
| CN211457455U (en) | Circuit for adjusting light and color temperature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |