CN204145832U - A kind of LED light modulating device - Google Patents
A kind of LED light modulating device Download PDFInfo
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- CN204145832U CN204145832U CN201420556153.XU CN201420556153U CN204145832U CN 204145832 U CN204145832 U CN 204145832U CN 201420556153 U CN201420556153 U CN 201420556153U CN 204145832 U CN204145832 U CN 204145832U
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- 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)
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Abstract
The utility model discloses a kind of LED light modulating device, comprise block signal processing unit, micro-control unit and dimming unit, described block signal processing unit receives input voltage, gathers rising edge signal and export high level signal, described micro-control unit receives high level signal and records logic state, different control signals is exported under different logic states, described dimming unit accepts described control signal, when receiving different control signals, described dimming unit has different duty ratios thus carries out light modulation by different duty ratios.
Description
[technical field]
The utility model relates to a kind of light modulating device, especially a kind of LED light modulating device.
[background technology]
On market, the design of dimming lamp majority is comparatively complicated, need remote controller or external light modulating device, and remote controller controls comparatively complicated, cost is higher, the lamp installation of external dimmer is also comparatively complicated, the not reserved space of installing external dimmer in a lot of family and place, this is all that the universal of dimming LED lamp causes obstacle.
On the other hand, in prior art, LED dimming lamp principle majority is the size of output current by regulating LED driver thus changes the luminosity of LED, so the precision of output current directly affects the change of LED luminance.In a lot of market, office, the places such as meeting room, when controlling many lamps, need the output brightness of every light fixture consistent, and traditional dimming mode is when low-light level exports, current precision is poor.Simultaneously, now also more and more higher to the requirement of light fixture colour temperature, when applying in high-end occasion, wish the change reduced as far as possible while changing LED luminance LED colour temperature, but when carrying out light modulation by the size of regulation output electric current to light fixture, different output currents can have an impact to colour temperature.
Therefore, in order to overcome above-mentioned defect, be necessary the LED light modulating device that a kind of improvement is provided.
[utility model content]
The purpose of this utility model is to provide a kind of LED light modulating device.
To achieve these goals, the utility model adopts following technical scheme: a kind of LED light modulating device, comprise block signal processing unit, micro-control unit and dimming unit, described block signal processing unit receives input voltage, gather rising edge signal and export high level signal, described micro-control unit receives high level signal and records logic state, different control signals is exported under different logic states, described dimming unit accepts described control signal, when receiving different control signals, described dimming unit has different duty ratios thus carries out light modulation by different duty ratios.
Preferably, described rising edge signal is triggered by the conducting of external switch.
Preferably, described dimming unit is pulse-width modulation dimming unit.
Preferably, described control signal comprises at least the first control signal and the second control signal, and the duty ratio of described dimming unit under the first control signal drives is different with the duty ratio under the second control signal driving.
Preferably, the logic state of described micro-control unit record is at least two, when described logic state is two, described micro-control unit first time receives described high level signal, is recorded as logic state one, exports the first control signal, described micro-control unit receives low level signal second time when receiving described high level signal within the set time again, be recorded as logic state two, export the second control signal, then logic state circulation.
Preferably, the input voltage that described micro-control unit receives drops to shutoff voltage a period of time and does not again power on, and when namely described micro-control unit does not detect high level within the set time, described micro-control unit resets; When again receiving high level signal afterwards, described micro-control unit will be recorded as logic state one.
Preferably, described micro-control unit comprises timer, and the described set time is set by the timer of described control unit.
Preferably, described block signal processing unit, micro-control unit and described dimming unit are integrated in same chip.
Compared to prior art, the utility model LED light modulating device has following advantage: switch and pulse-width modulation dimming unit can be utilized to realize sectional dimming.
[accompanying drawing explanation]
Fig. 1 is the schematic diagram of the LED light modulating device meeting the utility model preferred implementation.
Fig. 2 is the circuit diagram at the LED light modulating device place meeting the utility model preferred implementation.
[embodiment]
Please refer to shown in Fig. 1 to Fig. 2, a kind of LED light modulating device 1 of preferred implementation of the present utility model, comprises block signal processing unit 10, micro-control unit 20 and dimming unit 30.Block signal processing unit 10 receives input voltage, gathers rising edge signal Vs and export triggering signal.Micro-control unit 20 receives triggering signal and records logic state, different control signals is exported under different logic states, dimming unit 30 reception control signal, when receiving different control signals, dimming unit 30 has different duty ratios thus by the brightness of different duty cycle adjustment light.In the present embodiment, LED light modulating device 1 is an integrated chip, and this integrated chip is by micro-control unit 20(MCU) and dimming unit 30 be integrated in same chip.In other embodiments, also can change as required.In the present embodiment, block signal processing unit 10 is d type flip flop, and rising edge signal is converted into high level signal as triggering signal by d type flip flop.In other embodiments, block signal processing unit 10 also can be other devices, such as, replace with comparator and power on detection circuit, and need not detect rising edge signal, also rising edge signal can be processed into low level signal etc.
LED light modulating device 1 of the present utility model is sectional dimming device, and rising edge signal Vs is triggered by the conducting of external switch (not shown).During external switch conducting, send rising edge signal, when external switch turns off, send reset signal.
Dimming unit 30 is pulse-width modulation dimming unit (PWM dimming unit).Control signal comprises at least the first control signal and the second control signal, and the duty ratio of dimming unit 30 under the first control signal drives is different with the duty ratio under the second control signal driving.The logic state that micro-control unit 20 records is at least two, when logic state is two, micro-control unit 20 first time receives high level signal, be recorded as logic state one, export the first control signal, micro-control unit 20 receive low level signal again within the set time second time when receiving high level signal, be recorded as logic state two, export the second control signal, then logic state circulation.Set time is that block signal processing unit 10 input voltage drops to shutoff voltage a period of time and again do not power on, namely when micro-control unit 20 does not detect high level within the set time, micro-control unit 20 resets, when again receiving high level signal afterwards, micro-control unit 20 will be recorded as logic state one.Micro-control unit 20 inside has timer (not shown), and the set time is set by timer.In the present embodiment, dimming unit 30 has rest-set flip-flop 40, micro-control unit 20 exports the pwm signal of certain duty ratio to Enable Pin, and Enable Pin signal is exported by the control signal of rest-set flip-flop 40 and then control LED light modulating device 1, thus the duty ratio of regulation output electric current.
In the present embodiment, LED light modulating device 1 is three-stage dimming device, and namely control signal has the first control signal, the second control signal and the 3rd control signal, and the logic state of micro-control unit 20 has three.Timer sets one set time, when block signal processing unit 10 receives reset signal, and do not receive rising edge signal again within this set time, then micro-control unit 20 resets.When external switch first time conducting, send rising edge signal, block signal processing unit 10 sends high level after rising edge signal being detected, and micro-control unit 20 is recorded as logic state one after high level signal being detected for the first time, exports the first control signal.Have no progeny when external switch closes, send reset signal, within the set time, during the conducting of external switch second time, send rising edge signal again, block signal processing unit 10 detects that reset signal sends high level signal after rising edge signal being detected again within the set time, when micro-control unit 20 detected low level signal and high level signal detected for the second time within the set time, be recorded as logic state two, export the second control signal.When external switch turns off again, send reset signal, within the set time, during external switch third time conducting, send rising edge signal again, micro-control unit 20 detects low level signal, and when within the set time, third time detects rising edge signal, be recorded as logic state three, export the 3rd control signal.When external switch turns off for the 4th time, if micro-control unit 20 detects low level signal, send reset signal, within the set time, during external switch the 4th conducting, send rising edge signal again, micro-control unit 20 detects low level signal, and when rising edge signal being detected the 4th time within the set time, is again recorded as logic state one, export the 4th control signal, i.e. logic state circulation.Have no progeny when external switch closes, send reset signal, within the set time, if external switch not conducting, then micro-control unit 20 is after reset signal being detected, within the set time, again do not receive high level signal, then micro-control unit 20 resets.Micro-control unit 20 when again receiving high level signal, is recorded as logic state one, sends the first control signal after resetting.
In other embodiments, by micro-control unit 20 ready-made program, thus to arrange LED light modulating device 1 be the required different section light modulating devices of two sections of light modulations, three-stage dimming, four sections of light modulations etc.
The utility model is used in auto-oscillation type autonomous inverter circuit, please refer to shown in Fig. 2, in the present embodiment, LED light modulating device 1 is in buck topology circuit 2, the pin VS that auto-oscillation type autonomous inverter circuit 100 comprises LED light modulating device 1 receives rising edge signal and reset signal, pin GD exports control signal, control signal control switch element Q1.Switch element Q1 can be triode or metal-oxide-semiconductor.LED light modulating device 1 exports different control signals, the duty ratio of control switch element Q1, makes to carry out light regulating by duty ratio.During work, when pin VS does not detect signal, LED light modulating device 1 normally works, and is controlled circuit by the feedback of pin CS and pin ZCD, wherein the reopening of pin ZCD control switch element Q1, the shutoff of pin CS control switch element Q1.After pin VS detects rising edge signal, micro-control unit 20 exports the control signal of certain duty ratio to Enable Pin by the program of setting, enable signal is by shown in rest-set flip-flop 40(Fig. 1) and then the pin GD output control signal of controls LED light modulating device 1, thus the duty ratio of regulation output electric current, realize the adjustment of light further.LED light modulating device 1 also comprises pin FB and pin GND, is all pin common in light fixture driving chip.
Should be noted that, embodiment of the present utility model has preferably implementation, and not any type of restriction is done to the utility model, any person skilled in art of being familiar with may utilize the technology contents of above-mentioned announcement change or be modified to equivalent effective embodiment, in every case the content of technical solutions of the utility model is not departed from, the any amendment done above embodiment according to technical spirit of the present utility model or equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (8)
1. a LED light modulating device, comprise block signal processing unit, micro-control unit and dimming unit, described block signal processing unit receives input voltage, gathers rising edge signal and export high level signal, described micro-control unit receives high level signal and records logic state, different control signals is exported under different logic states, described dimming unit accepts described control signal, when receiving different control signals, described dimming unit has different duty ratios thus carries out light modulation by different duty ratios.
2. LED light modulating device as claimed in claim 1, is characterized in that: described rising edge signal is triggered by the conducting of external switch.
3. LED light modulating device as claimed in claim 1, is characterized in that: described dimming unit is pulse-width modulation dimming unit.
4. LED light modulating device as claimed in claim 1, it is characterized in that: described control signal comprises at least the first control signal and the second control signal, the duty ratio of described dimming unit under the first control signal drives is different with the duty ratio under the second control signal driving.
5. LED light modulating device as claimed in claim 4, it is characterized in that: the logic state of described micro-control unit record is at least two, when described logic state is two, described micro-control unit first time receives described high level signal, be recorded as logic state one, export the first control signal, described micro-control unit receives low level signal second time when receiving described high level signal within the set time again, be recorded as logic state two, export the second control signal, then logic state circulation.
6. LED light modulating device as claimed in claim 5, it is characterized in that: the input voltage that described micro-control unit receives drops to shutoff voltage a period of time and again do not power on, namely, when described micro-control unit does not detect high level within the set time, described micro-control unit resets; When again receiving high level signal afterwards, described micro-control unit will be recorded as logic state one.
7. LED light modulating device as claimed in claim 6, it is characterized in that: described micro-control unit comprises timer, the described set time is set by the timer of described control unit.
8. LED light modulating device as claimed in claim 1, is characterized in that: described block signal processing unit, micro-control unit and described dimming unit are integrated in same chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420556153.XU CN204145832U (en) | 2014-09-25 | 2014-09-25 | A kind of LED light modulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420556153.XU CN204145832U (en) | 2014-09-25 | 2014-09-25 | A kind of LED light modulating device |
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| Publication Number | Publication Date |
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| CN204145832U true CN204145832U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420556153.XU Expired - Fee Related CN204145832U (en) | 2014-09-25 | 2014-09-25 | A kind of LED light modulating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182687A (en) * | 2020-01-22 | 2020-05-19 | 上海晶丰明源半导体股份有限公司 | Dimming control circuit, driving device thereof and control method thereof |
-
2014
- 2014-09-25 CN CN201420556153.XU patent/CN204145832U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182687A (en) * | 2020-01-22 | 2020-05-19 | 上海晶丰明源半导体股份有限公司 | Dimming control circuit, driving device thereof and control method thereof |
| CN111182687B (en) * | 2020-01-22 | 2022-04-29 | 上海晶丰明源半导体股份有限公司 | Dimming control circuit, driving device thereof and control method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 |