CN102548084A - Device and method for controlling light source in gradual brightness change manner - Google Patents
Device and method for controlling light source in gradual brightness change manner Download PDFInfo
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- CN102548084A CN102548084A CN2010105774015A CN201010577401A CN102548084A CN 102548084 A CN102548084 A CN 102548084A CN 2010105774015 A CN2010105774015 A CN 2010105774015A CN 201010577401 A CN201010577401 A CN 201010577401A CN 102548084 A CN102548084 A CN 102548084A
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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
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- 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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Abstract
The invention discloses a device and a method for controlling a light source in a gradual brightness change manner. The device for controlling the light source in the gradual brightness change manner comprises a light source, a light source driving unit, a switch unit, and an MCU (Microgrammed Control Unit), wherein the MCU is used for detecting a switching action of the switch unit and whether the light source is turned on, calculating the duty cycle of drive pulses, outputting the drive pulses to the light source driving unit, detecting the time span for outputting the drive pulses, and storing the duty cycle of the drive pulses, the variation step length of the duty cycles of the drive pulses, the duty cycle of the maximum drive pulse, the duty cycle of the minimum drive pulse and the variation time period of the duty cycle of the drive pulse. According to the invention, According to the invention, the gradual lighting of gradual dimming of a lamp is realized by controlling the duty cycle of the drive pulses of the drive light source, so that the service life of the lamp is prolonged, in addition, by addition of a brightness detection unit, the brightness of the light source is regulated based on ambient brightness, so that the brightness sensed by human eyes is stabilized, and the stimulations to the human eyes are reduced and the health of the human eyes is protected.
Description
Technical field
The present invention relates to gradual light source control device of a kind of brightness and method thereof, particularly relate to a kind of brightness gradual led light source control device and method thereof.
Background technology
In today that the family expenses light fixture emerges in an endless stream, businessman can obtain more comfortable soft light in order to make the user, numerous and confused " soft light ", " the comfortable lamp " released.But soft light still is common fluorescent lamp, light fixture all is to press the instantaneous of switch, and the brightness of light fixture reaches high-high brightness, and light fixture is instantaneous during cut-off switch extinguishes.The variation of this unexpected brightness makes that human eye is difficult to adapt to, and when the unexpected variation of brightness, under the serious situation, even possibly cause dizzy.
And existing household light fixtures all can have the described light fixture of powerful rush of current at every turn repeatedly when opening light fixture, thereby reduces its fail safe the useful life of impairment light fixture.Though low-light level light fixture such as so-called soft light can reduce the stimulation of light to glasses in addition; But because its brightness is not high, can the damage human eyesight thereby cause, though brightness such as common fluorescent lamp is pure in addition; But the moment of turning on light; Because brightness reaches high-high brightness, thus very dazzling, unfavorable to human eye health.
And existing mainly be to realize for the slow bright structure of bulb through hardware; Increased the cost of product so on the one hand, on the other hand owing to the use that has increased hardware, in case certain parts in the hardware are damaged; Then total can not be used, and the fraction defective of product is also than higher like this.
Summary of the invention
The technical problem that the present invention will solve is to brighten in order to overcome in the prior art light source moment; Thereby influence the defective that human eye is healthy and damage light fixture easily; Gradual light source control device of a kind of brightness and method thereof are provided; Through light source is slowly brightened or deepening, thereby reduce stimulation that human eye receives and the useful life that prolongs light fixture.
The present invention solves above-mentioned technical problem through following technical proposals:
The invention provides the gradual light source control device of a kind of brightness, comprise a light source, a light source driving units and a switch element, be characterized in that the gradual light source control device of this brightness also comprises:
One MCU; Whether the switch motion and the light source that are used for the sense switch unit are opened; Calculate the duty ratio of driving pulse and export said driving pulse to said light source driving units; And the time span that detects driving pulse output, and storing driver pulse duty factor, driving pulse change in duty cycle step-length, maximum drive pulse duty factor, minimum driving pulse duty ratio and driving pulse change in duty cycle time cycle.
Preferably, described light source driving units comprises a digital transistor, a transistor, one first resistance and one second resistance;
Wherein said digital transistor has first base stage, first collector electrode and first emitter; Described transistor has second base stage, second collector electrode and second emitter; Described first base stage is electrically connected with MCU; Described first grounded emitter; Described first collector electrode is electrically connected with second base stage through first resistance, and said second base stage also is electrically connected with second emitter through second resistance, and said second collector electrode is electrically connected with light source.
Preferably; Described light source driving units also comprises a diode; Said diode comprises an anodal and negative pole, and the positive pole of wherein said diode is electrically connected with said transistorized second emitter, and the negative pole of said diode is electrically connected with said transistorized second collector electrode.
Preferably, described light source driving units also comprises one the 3rd resistance, and described the 3rd resistance is electrically connected with first base stage of described digital transistor.
Preferably, described light source is a LED.
Preferably, the gradual light source control device of described brightness also comprises a brightness detection unit, is used for the illumination brightness of testing environment.
Preferably, described MCU also is used for storage environment illumination brightness, and said ambient brightness is converted into the ambient brightness pulse duty factor, and from the maximum drive pulse duty factor, deducts the ambient brightness pulse duty factor.
Preferably, described brightness detection unit is a light sensor.
Preferably, the gradual light source control device of described brightness also comprises one first filter, is used for the signal of the ambient brightness of lightness stabilized detecting unit output.
Preferably, the gradual light source control device of described brightness also comprises one second filter, is used for the signal of the on off state of stable switch unit output.
The present invention also provides the gradual control method that brightens of light source of the gradual light source control device of a kind of aforesaid brightness, is characterized in may further comprise the steps:
S
101, whether MCU sense switch unit carry out breakdown action, if testing result is for being then to get into step S
102, otherwise repeating step S
101
S
102, whether the MCU detection light source open, if testing result then gets into step S for not
103, otherwise return step S
101
S
103, MCU set the driving pulse duty ratio be minimum driving pulse duty ratio and according to said driving pulse duty ratio output driving pulse to light source driving units;
S
104, whether the MCU time span that detects driving pulse output arrive the described driving pulse change in duty cycle time cycle, if testing result is for being then to get into step S
105, otherwise repeating step S
104
S
105, MCU adds the driving pulse duty ratio with driving pulse change in duty cycle step-length; And whether detect driving pulse duty ratio after this calculating greater than the maximum drive pulse duty factor; If testing result is for being; Then MCU exports pulse to light source driving units according to the maximum drive pulse duty factor, otherwise exports driving pulse to light source driving units, and returns step S
104
Preferably, the gradual light source control device of described brightness also comprises a brightness detection unit; Described MCU also is used for storage and conversion environment illumination brightness is the ambient brightness pulse duty factor, and from the maximum drive pulse duty factor, deducts the ambient brightness pulse duty factor, and at step S
101In further comprising the steps of:
S
1011, whether MCU sense switch unit carry out breakdown action, if testing result is not for, the then illumination brightness of the detected environment of brightness detection unit and be sent to MCU;
S
1012, MCU is converted into the ambient brightness pulse duty factor with said ambient brightness, and from the maximum drive pulse duty factor, deducting ambient brightness pulse duty factor, repeating step S
101
Preferably, at step S
101Further comprising the steps of before:
S
100, MCU storing driver pulse duty factor, driving pulse change in duty cycle step-length, maximum drive pulse duty factor, minimum driving pulse duty ratio and the driving pulse change in duty cycle time cycle in advance.
The present invention also provides the gradual deepening control method of light source of the gradual light source control device of a kind of aforesaid brightness, is characterized in may further comprise the steps:
S
201, whether MCU sense switch unit carry out closing motion, if testing result is for being then to get into step S
202, otherwise repeating step S
201
S
202, whether the MCU detection light source open, if testing result is for being then to get into step S
203, otherwise return step S
201
S
203, MCU set the driving pulse duty ratio be the maximum drive pulse duty factor and according to driving pulse duty ratio output pulse to light source driving units;
5
204, whether the MCU time span that detects driving pulse output arrive the described driving pulse change in duty cycle time cycle, if testing result is for being then to get into step S
205, otherwise repeating step S
204
S
205, MCU deducts driving pulse change in duty cycle step-length from the driving pulse duty ratio; And whether detect driving pulse duty ratio after this calculating less than minimum driving pulse duty ratio; If testing result is for being; Then MCU exports pulse to light source driving units according to minimum driving pulse duty ratio, otherwise exports driving pulse to light source driving units, and returns step S
204
Preferably, in step 5
201Further comprising the steps of before:
S
200, MCU storing driver pulse duty factor, driving pulse change in duty cycle step-length, maximum drive pulse duty factor, minimum driving pulse duty ratio and the driving pulse change in duty cycle time cycle in advance.
Positive progressive effect of the present invention is:
The present invention recently realizes the gradually bright or gradually dark of light fixture through the duty of the signal pulse of MCU controlling and driving light source; Thereby prolonged the useful life of light fixture; Through adding brightness detection unit, realized regulating the high-high brightness of light source, thereby stablized the brightness that human eye is experienced in addition based on ambient brightness; Thereby reduced the stimulation that human eye receives, protected the health of human eye.
Description of drawings
Fig. 1 is the circuit structure block diagram of the preferred embodiment of the gradual light source control device of brightness of the present invention.
Fig. 2 is the circuit diagram of preferred embodiment of the light source driving units of the gradual light source control device of brightness of the present invention.
Fig. 3 is the flow chart of the preferred embodiment of the gradual control method that brightens of light source of the gradual light source control device of brightness of the present invention.
Fig. 4 is the flow chart of preferred embodiment of the gradual deepening control method of light source of the gradual light source control device of brightness of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to specify technical scheme of the present invention.
1, the embodiment of the gradual light source control device of brightness
Shown in Figure 1 is the circuit structure block diagram of the gradual light source control device of brightness of the present invention, and the gradual light source control device of wherein said brightness comprises a MCU1 (microcontroller), a light source driving units 2, a light source 3, a switch element 4, a brightness detection unit 5, one first filter 7 and one second filter 8.
Whether wherein said MCU1 is used for the switch motion and the light source 3 of sense switch unit 4 and opens; Calculate duty of ratio and export said pulse to said light source driving units 2; And the time span that detects driving pulse output; And storing driver pulse duty factor, driving pulse change in duty cycle step-length, maximum drive pulse duty factor, minimum driving pulse duty ratio and driving pulse change in duty cycle time cycle, and storage environment illumination brightness and set the maximum drive pulse duty factor according to described ambient brightness.
What the light source 3 described in the present embodiment adopted is LED (light-emitting diode), and the staff of this area can be according to the concrete needs of the light fixture light source with the kind that requires to adopt other.
Described brightness detection unit 5 is used for the illumination brightness of testing environment; Brightness detection unit 5 described in the present embodiment can adopt light sensor to come the illumination brightness of testing environment; The staff of this area can be according to the actual needs and the luminance detection device that requires to adopt other of sensed luminance; Circuit or device, thus realize the function of identical sensed luminance.
Described first filter 7 is used for the signal of the ambient brightness of lightness stabilized detecting unit 5 outputs.Described second filter 8 is used for the signal of the on off state of stable switch unit 4 outputs.
Light source driving units 2 in the present embodiment is used for driving light source 3; Promptly be used for a bright light source 3; The circuit structure of wherein said light source driving units 2 is as shown in Figure 2, and wherein said light source driving units 2 comprises a digital transistor 21, a transistor 22, one first resistance 23, one second resistance 24, one the 3rd resistance 25 and diode 26.
Wherein said digital transistor 21 has first base stage, first collector electrode and first emitter; Described transistor 22 has second base stage, second collector electrode and second emitter; Described first base stage is electrically connected with MCU1; Described first grounded emitter; Described first collector electrode is electrically connected with second base stage through first resistance 23, and said second base stage also is electrically connected with second emitter through second resistance 24, and said second collector electrode is electrically connected with light source 3; Said diode 26 comprises an anodal and negative pole; The positive pole of wherein said diode 26 is electrically connected with second emitter of said transistor 22, and the negative pole of said diode is electrically connected with second collector electrode of said transistor 22, and described the 3rd resistance 25 is electrically connected with first base stage of described digital transistor 21.
The operation principle of the gradual light source control device of brightness in the present embodiment is following:
1.1, the gradual operation principle that brightens of light source of the gradual light source control device of brightness
At first, MCU1 storing driver pulse duty factor D, driving pulse change in duty cycle step-length D in advance
Change, maximum drive pulse duty factor D
Max, minimum driving pulse duty ratio D
MinWith driving pulse change in duty cycle period of time T
D
Then, MCU1 receives the illumination brightness of brightness detection unit 5 detected environment, and MCU1 is converted into ambient brightness pulse duty factor D with said ambient brightness
s, and from maximum drive pulse duty factor D
MaxIn deduct ambient brightness pulse duty factor D
s, i.e. D
Max=D
Max-D
sWhether MCU1 sense switch unit 4 carries out breakdown action then; If do not detect breakdown action; Then whether MCU1 duplicate detection switch element 4 carries out breakdown action, otherwise whether MCU1 detection light source 3 opens; If testing result is not, then MCU1 setting driving pulse duty ratio D is minimum driving pulse duty ratio D
Min, promptly make D=D
Min, and according to said driving pulse duty ratio D output driving pulse to light source driving units 2, light source driving units 2 is according to the driving pulse driving light source 3 that receives then.
After this, MCU1 detects the time span T that exports above-mentioned driving pulse and whether arrives described driving pulse change in duty cycle period of time T
D, if testing result is T=T
D, then MCU1 is with driving pulse change in duty cycle step-length D
ChangeAdd driving pulse duty ratio D, i.e. D=D+D
Change, and whether detect driving pulse duty ratio D after this calculating greater than maximum drive pulse duty factor D
Max, if testing result is for being that then MCU1 is according to maximum drive pulse duty factor D
MaxOutput pulse to light source driving units 2, light source driving units 2 is according to the driving pulse driving light source 3 that receives then, and the time span T of replacement driving pulse output is 0; Otherwise whether the time span T of the above-mentioned driving pulse output of MCU1 duplicate detection arrives described driving pulse change in duty cycle period of time T
D
After this continuous repetition through said process makes light source 3 gradual brightening.
Wherein, the operation principle of light source driving units 2 is following:
The 3rd resistance 25 is used for stablizing the driving pulse of MCU1 output; Prevent because the driving pulse decay that transmission causes; After this driving pulse is through the amplifying circuit of digital transistor 21, transistor 22 and first resistance 23 and second resistance, 24 compositions; Thereby output is used for the drive pulse signal of amplification of driving light source 3, and wherein diode 26 is used to prevent that transistor 22 from damaging owing to electric current is excessive.
1.2, the operation principle of the gradual deepening of light source of the gradual light source control device of brightness
When light source 3 maintenances were shinny, MCU1 stored driving pulse duty ratio D, driving pulse change in duty cycle step-length D
Change, maximum drive pulse duty factor D
Max, minimum driving pulse duty ratio D
MinWith driving pulse change in duty cycle period of time T
DMCU1 output this moment maximum drive pulse duty factor D
MaxTo light source driving units 2.
Then; Whether MCU1 sense switch unit 4 carries out closing motion, if not detecting switch element 4 has carried out closing motion, then whether MCU1 duplicate detection switch element 4 carries out closing motion; Otherwise; Whether MCU1 detection light source 3 opens, if testing result is for being, then MCU1 setting driving pulse duty ratio D is maximum drive pulse duty factor D
Max, i.e. D=D
Max+, and output pulse to light source driving units 2, light source driving units 2 is according to the driving pulse driving light source 3 that receives then.
After this, MCU1 detects the time span T that exports above-mentioned driving pulse and whether arrives described driving pulse change in duty cycle period of time T
D, if testing result is for being that then MCU1 deducts driving pulse change in duty cycle step-length D from driving pulse duty ratio D
Change, i.e. D=D-D
Change, and whether detect driving pulse duty ratio D after this calculating less than minimum driving pulse duty ratio D
Min, if testing result is for being that then MCU1 is according to minimum driving pulse duty ratio D
MinOutput pulse to light source driving units 2, light source driving units 2 is according to the driving pulse driving light source 3 that receives then, and the time span T of replacement driving pulse output is 0; Otherwise whether the time span T of the above-mentioned driving pulse output of MCU1 duplicate detection arrives described driving pulse change in duty cycle period of time T
D
After this continuous repetition through said process makes light source 3 gradual deepenings.
Wherein the operation principle of light source driving units 2 is not just being given unnecessary details as stated here.
2, the embodiment of the gradual control method that brightens of the light source of the gradual light source control device of brightness
The flow chart of the gradual control method that brightens of light source for the gradual light source control device of brightness of the present invention shown in Figure 3, comprising following steps:
Step 100, MCU is storing driver pulse duty factor D, driving pulse change in duty cycle step-length D in advance
Change, maximum drive pulse duty factor D
Max, minimum driving pulse duty ratio D
MinWith driving pulse change in duty cycle period of time T
DSaid step 100 is the step S in the claim 13
100
Step 101, whether MCU sense switch unit carries out breakdown action, if testing result for being, then gets into step 103, otherwise gets into step 102.Said step 101 is the step S in the claim 11
101
Step 102, the illumination brightness of the detected environment of brightness detection unit also is sent to MCU and said ambient brightness is converted into ambient brightness pulse duty factor D
s, and from maximum drive pulse duty factor D
MaxIn deduct the ambient brightness pulse duty factor, i.e. D
Max=D
Max-D
sReturn step 101 then.Said step 102 is the step S in the claim 12
1011With step S
1012
Step 103, whether the MCU detection light source opens, if testing result for being, is then returned step 101, otherwise gets into step 104.Said step 103 is the step S in the claim 11
102
Step 104, it is minimum driving pulse duty ratio D that MCU sets driving pulse duty ratio D
Min, and according to said driving pulse duty ratio D output driving pulse to light source driving units, i.e. D=D
MaxThereby, the drive point bright light source.Said step 104 is the step S in the claim 11
103
Step 105, whether the time span T that MCU detects above-mentioned driving pulse output arrives described driving pulse change in duty cycle period of time T
D, if testing result for being, then gets into step 106, otherwise repeating step 105.Said step 105 is the step S in the claim 11
104
Step 106, MCU is with driving pulse change in duty cycle step-length D
ChangeAdd driving pulse duty ratio D, i.e. D=D+D
Change, and with described driving pulse duty ratio D output driving pulse to light source driving units.
Step 107, whether the driving pulse duty ratio D after this calculating of MCU detection is greater than maximum drive pulse duty factor D
Max, if testing result for being, then gets into step 107, otherwise the time span T of replacement driving pulse output also returns step 105.
Step 108, MCU is according to maximum drive pulse duty factor D
MaxThe output pulse is to light source driving units.Said step 106, step 107 and step 108 are the step S in the claim 11
105
3, the embodiment of the gradual deepening control method of the light source of the gradual light source control device of brightness
Shown in Figure 4 is the flow chart of the gradual deepening control method of light source of the gradual light source control device of brightness of the present invention, comprising following steps:
Though more than described embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited appended claims.Those skilled in the art can make numerous variations or modification to these execution modes under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (15)
1. the gradual light source control device of brightness comprises a light source, a light source driving units and a switch element, it is characterized in that, the gradual light source control device of this brightness also comprises:
One MCU; Whether the switch motion and the light source that are used for the sense switch unit are opened; Calculate the duty ratio of driving pulse and export said driving pulse to said light source driving units; And the time span that detects driving pulse output, and storing driver pulse duty factor, driving pulse change in duty cycle step-length, maximum drive pulse duty factor, minimum driving pulse duty ratio and driving pulse change in duty cycle time cycle.
2. the gradual light source control device of brightness as claimed in claim 1 is characterized in that, described light source driving units comprises a digital transistor, a transistor, one first resistance and one second resistance;
Wherein said digital transistor has first base stage, first collector electrode and first emitter; Described transistor has second base stage, second collector electrode and second emitter; Described first base stage is electrically connected with MCU; Described first grounded emitter; Described first collector electrode is electrically connected with second base stage through first resistance, and said second base stage also is electrically connected with second emitter through second resistance, and said second collector electrode is electrically connected with light source.
3. the gradual light source control device of brightness as claimed in claim 2; It is characterized in that; Described light source driving units also comprises a diode; Said diode comprises an anodal and negative pole, and the positive pole of wherein said diode is electrically connected with said transistorized second emitter, and the negative pole of said diode is electrically connected with said transistorized second collector electrode.
4. the gradual light source control device of brightness as claimed in claim 2 is characterized in that described light source driving units also comprises one the 3rd resistance, and described the 3rd resistance is electrically connected with first base stage of described digital transistor.
5. the gradual light source control device of brightness as claimed in claim 1 is characterized in that described light source is a LED.
6. the gradual light source control device of brightness as claimed in claim 1 is characterized in that the gradual light source control device of described brightness also comprises a brightness detection unit, is used for the illumination brightness of testing environment.
7. the gradual light source control device of brightness as claimed in claim 6; It is characterized in that; Described MCU also is used for storage environment illumination brightness, and said ambient brightness is converted into the ambient brightness pulse duty factor, and from the maximum drive pulse duty factor, deducts the ambient brightness pulse duty factor.
8. the gradual light source control device of brightness as claimed in claim 6 is characterized in that described brightness detection unit is a light sensor.
9. the gradual light source control device of brightness as claimed in claim 6 is characterized in that the gradual light source control device of described brightness also comprises one first filter, is used for the signal of the ambient brightness of lightness stabilized detecting unit output.
10. like the gradual light source control device of each described brightness of claim 1-9, it is characterized in that the gradual light source control device of described brightness also comprises one second filter, be used for the signal of the on off state of stable switch unit output.
11. the gradual control method that brightens of the light source of the gradual light source control device of brightness as claimed in claim 1 is characterized in that, may further comprise the steps:
S
101, whether MCU sense switch unit carry out breakdown action, if testing result is for being then to get into step S
102, otherwise repeating step S
101
S
102, whether the MCU detection light source open, if testing result then gets into step S for not
103, otherwise return step S
101
S
103, MCU set the driving pulse duty ratio be minimum driving pulse duty ratio and according to said driving pulse duty ratio output driving pulse to light source driving units;
S
104, whether the MCU time span that detects driving pulse output arrive the described driving pulse change in duty cycle time cycle, if testing result is for being then to get into step S
105, otherwise repeating step S
104
S
105, MCU adds the driving pulse duty ratio with driving pulse change in duty cycle step-length; And whether detect driving pulse duty ratio after this calculating greater than the maximum drive pulse duty factor; If testing result is for being; Then MCU exports pulse to light source driving units according to the maximum drive pulse duty factor, otherwise exports driving pulse to light source driving units, and returns step S
104
12. the gradual control method that brightens of light source as claimed in claim 11 is characterized in that the gradual light source control device of described brightness also comprises a brightness detection unit; Described MCU also is used for storage and conversion environment illumination brightness is the ambient brightness pulse duty factor, and from the maximum drive pulse duty factor, deducts the ambient brightness pulse duty factor, and at step S
101In further comprising the steps of:
S
1011, whether MCU sense switch unit carry out breakdown action, if testing result is not for, the then illumination brightness of the detected environment of brightness detection unit and be sent to MCU;
S
1012, MCU is converted into the ambient brightness pulse duty factor with said ambient brightness, and from the maximum drive pulse duty factor, deducting ambient brightness pulse duty factor, repeating step S
101
13. the gradual control method that brightens of light source as claimed in claim 11 is characterized in that, at step S
101Further comprising the steps of before:
S
100, MCU storing driver pulse duty factor, driving pulse change in duty cycle step-length, maximum drive pulse duty factor, minimum driving pulse duty ratio and the driving pulse change in duty cycle time cycle in advance.
14. the gradual deepening control method of the light source of the gradual light source control device of brightness as claimed in claim 1 is characterized in that, may further comprise the steps:
S
201, whether MCU sense switch unit carry out closing motion, if testing result is for being then to get into step S
202, otherwise repeating step S
201
S
202, whether the MCU detection light source open, if testing result is for being then to get into step S
203, otherwise return step S
201
S
203, MCU set the driving pulse duty ratio be the maximum drive pulse duty factor and according to driving pulse duty ratio output pulse to light source driving units;
S
204, whether the MCU time span that detects driving pulse output arrive the described driving pulse change in duty cycle time cycle, if testing result is for being then to get into step S
205, otherwise repeating step S
204
S
205, MCU deducts driving pulse change in duty cycle step-length from the driving pulse duty ratio; And whether detect driving pulse duty ratio after this calculating less than minimum driving pulse duty ratio; If testing result is for being; Then MCU exports pulse to light source driving units according to minimum driving pulse duty ratio, otherwise exports driving pulse to light source driving units, and returns step S
204
15. the gradual control method that brightens of light source as claimed in claim 14 is characterized in that, at step S
201Further comprising the steps of before:
S
200, MCU storing driver pulse duty factor, driving pulse change in duty cycle step-length, maximum drive pulse duty factor, minimum driving pulse duty ratio and the driving pulse change in duty cycle time cycle in advance.
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| CN104704435A (en) * | 2012-09-28 | 2015-06-10 | 皇家飞利浦有限公司 | Methods and apparatus for adjusting a lighting parameter in a light management system based on user action. |
| CN105554935A (en) * | 2015-12-16 | 2016-05-04 | 冯秋林 | Fade-in or fade-out LED lamp programmable controller |
| CN107613603A (en) * | 2017-08-25 | 2018-01-19 | 昂宝电子（上海）有限公司 | LED delays bright control system |
| CN108513394A (en) * | 2018-03-23 | 2018-09-07 | 佛山德仁照明科技有限公司 | A kind of LED lamp slowly started |
| CN110012580A (en) * | 2019-04-19 | 2019-07-12 | 青岛亿联客信息技术有限公司 | A kind of method for controlling lamp, device, system and computer readable storage medium |
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| CN107613603B (en) * | 2017-08-25 | 2020-01-03 | 昂宝电子（上海）有限公司 | LED slow-lighting control system |
| CN108513394A (en) * | 2018-03-23 | 2018-09-07 | 佛山德仁照明科技有限公司 | A kind of LED lamp slowly started |
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