CN103476194A - Secondary dimming method of pulse width modulation of gas discharge lamp - Google Patents
Secondary dimming method of pulse width modulation of gas discharge lamp Download PDFInfo
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- CN103476194A CN103476194A CN2013104054699A CN201310405469A CN103476194A CN 103476194 A CN103476194 A CN 103476194A CN 2013104054699 A CN2013104054699 A CN 2013104054699A CN 201310405469 A CN201310405469 A CN 201310405469A CN 103476194 A CN103476194 A CN 103476194A
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Abstract
The invention discloses a secondary dimming method of pulse width modulation of a gas discharge lamp. The pulse duty factor of a first basic wave is modulated and set, the pulse duty factor of a second basic wave is modulated and set, and secondary modulation is conducted on the first basic wave and the second basic wave for dimming. According to the dimming method, secondary pulse width modulation is conducted on the gas discharge lamp, the discharge noise which can be heard by human ears is avoided, and smooth adjusting of the luminance of the gas discharge lamp is also achieved.
Description
[technical field]
The present invention relates to a kind of gaseous discharge lamp pulse width modulation secondary light modulation method.
[background technology]
In currently available technology, the method that gaseous discharge lamp is commonly used mainly contains two kinds, and the one, by adjusting resistance, the brightness of gaseous discharge lamp is regulated, but can be had loss on resistance, and this method is not suitable for the product of load resonant work; Another kind is exactly pulse width modulation light modulation method, by pulse-width modulated, the brightness of gaseous discharge lamp is regulated, this method is for all circuit, but when modulating frequency during lower than 20KHZ, will produce the discharge noise that people's ear can be heard, during higher than 20KHZ, just can not realize the smooth adjustment of gaseous discharge lamp brightness when modulating frequency.
[summary of the invention]
The present invention has overcome the deficiency of above-mentioned technology, a kind of gaseous discharge lamp pulse width modulation secondary light modulation method is provided, by gaseous discharge lamp being carried out to the light-dimming method of second pulse width modulated, both avoided producing the discharge noise that people's ear can be heard, realized again the smooth adjustment of gaseous discharge lamp brightness.
For achieving the above object, the present invention has adopted following technical proposal:
A kind of gaseous discharge lamp pulse width modulation secondary light modulation method:
The first step: the operation wavelength of gaseous discharge lamp first foundation ripple is LA, total modulation wavelength of first foundation ripple is LB, therefore the maximum tunable optical progression of first foundation ripple is n=LB/LA, it is P1=k * LA/LB that first foundation wave impulse duty ratio is set in modulation, LA<LB wherein, 1≤k≤n-1,10≤n≤20;
Second step: the operation wavelength of gaseous discharge lamp the second basic ripple is LA, and total modulation wavelength of the second basic ripple is LB, and it is P2=100%, wherein LA<LB that the second basic wave impulse duty ratio is set in modulation;
The 3rd step: take total modulation wavelength as LM, first foundation ripple and the second basic ripple are carried out to secondary modulation, the maximum adjustable progression of secondary modulation is m=LM/LB, therefore the secondary modulation duty ratio is Qh=P2 * h/m+P1 * (m-h)/m, LB<LM wherein, 0≤h≤m, 80≤m≤120, h is larger for secondary modulation progression, and the secondary modulation duty ratio is larger, and gaseous discharge lamp is brighter.
Described first foundation wave impulse duty ratio is 8%≤P1<100%.
Described first foundation wave impulse duty ratio is 8%≤P1≤80%.
Described first foundation wave impulse duty ratio is 8%≤P1≤50%.
Described first foundation wave impulse duty ratio is 20%≤P1≤50%.
The total modulation wavelength LB >=50us of described light modulation for the first time.
The operation wavelength of described gaseous discharge lamp light modulation for the first time is LA=4us, and the total modulation wavelength of gaseous discharge lamp light modulation for the first time is LB=50us, and the minimum pulse duty ratio of setting gaseous discharge lamp light modulation for the first time is p=2 * LA/LB=16%.
Described gaseous discharge lamp is with the total modulation wavelength LB=50us of light modulation for the first time for light modulation operation wavelength for the second time, and the total modulation wavelength of gaseous discharge lamp light modulation for the second time is LM=5000us, and therefore light modulation progression has m=LM/LB=100 for the second time.
The invention has the beneficial effects as follows:
1, the present invention, by the light-dimming method of second pulse width modulated, has realized multistage several brightness modulation, has realized level and smooth light modulation.
2, the present invention is applicable to all circuit.
3, electrical loss of the present invention is low, and cost is low, meets the economic benefit of enterprise.
[accompanying drawing explanation]
Fig. 1 is first foundation waveform figure of the present invention;
Fig. 2 is the of the present invention second basic waveform figure;
Fig. 3 is secondary modulation oscillogram of the present invention;
The first foundation ripple P1=16% oscillogram that Fig. 4 is the embodiment of the present invention;
The second basic ripple P1=100% oscillogram that Fig. 5 is the embodiment of the present invention;
The secondary modulation oscillogram that Fig. 6 is the embodiment of the present invention.
[embodiment]
Below in conjunction with accompanying drawing and embodiments of the present invention, be described in further detail:
A kind of gaseous discharge lamp pulse width modulation secondary light modulation method is as follows:
101: the operation wavelength of gaseous discharge lamp first foundation ripple is LA, and total modulation wavelength is LB, so the maximum tunable optical progression of first foundation ripple is n=LB/LA, and it is P1=k*LA/LB that first foundation wave impulse duty ratio is set in modulation, LA<LB wherein, 1≤k≤n-1;
102: the operation wavelength of gaseous discharge lamp the second basic ripple is LA, and total modulation wavelength is LB, and it is P2=100% that the second basic wave impulse duty ratio is set in modulation;
103: take total modulation wavelength as LM, first foundation ripple and the second basic ripple are carried out to secondary modulation, the maximum adjustable progression of secondary modulation is m=LM/LB, therefore the secondary modulation duty ratio is Qh=P2 * h/m+P1 * (m-h)/m, 0≤h≤m wherein, h is larger for secondary modulation progression, and gaseous discharge lamp is brighter.
The total modulation wavelength LB >=50us of described light modulation for the first time, modulating frequency, higher than 20KHZ, when modulation wavelength is greater than 50us, can prevent discharge noise.
Embodiment:
The operation wavelength of setting described gaseous discharge lamp first foundation ripple is LA=4us, total modulation wavelength LB=50us, the maximum tunable optical progression of gaseous discharge lamp first foundation ripple is the n=LB/LA=12 level, therefore Gas lamp first foundation wave impulse duty ratio is P1=k * LA/LB, 0≤k≤12 wherein, the brightness of gaseous discharge lamp blast along with the increase of first foundation wave impulse duty ratio, 0 grade of light is not luminance of gaseous discharge lamp, 12 grades of light are the brightest state of gaseous discharge lamp.
The operation wavelength of gaseous discharge lamp the second basic ripple is LA=4us, total modulation wavelength LB=50us, and the second basic ripple duty ratio P2=100% is set in modulation.
For stability and its practical life-span of prolongation of improving gaseous discharge lamp, it is k=2 that the present embodiment is set first foundation ripple light modulation progression, sets gaseous discharge lamp first foundation ripple minimum pulse duty ratio P1=2 * LA/LB=16%.
Take total modulation wavelength as LM=5000us, first foundation ripple and the second basic ripple are carried out to secondary modulation, the maximum adjustable progression of secondary modulation is m=LM/LB=100, wherein secondary modulation pulse duty factor is Qh=P2 * h/m+P1 * (m-h)/m, 0≤h≤100 wherein, h is larger for secondary modulation progression, and gaseous discharge lamp is brighter.
Therefore, when secondary modulation progression h=0, i.e. secondary modulation pulse duty factor is Q0=100% * 0/100+16% * (100-0)/100 *=16%.
When secondary modulation progression h=1, i.e. secondary modulation pulse duty factor is Q1=100% * 1/100+16% * (100-1)/100=16.84%.
When secondary modulation progression h=2, i.e. secondary modulation pulse duty factor is Q2=100% * 2/100+16% * (100-2)/100 *=17.68%.
When secondary modulation progression h=3, i.e. secondary modulation pulse duty factor is Q3=100% * 3/100+16% * (100-3)/100 *=18.52%.
……
When secondary modulation progression h=100, i.e. secondary modulation pulse duty factor is Q100=100% * 100/100+16% * (100-100)/100=100%.
Along with the increase of secondary modulation progression h, blast has realized the level and smooth light modulation of gas discharge light simultaneously in the brightness of gaseous discharge lamp.
Claims (8)
1. a gaseous discharge lamp pulse width modulation secondary light modulation method is characterized in that:
A) operation wavelength of gaseous discharge lamp first foundation ripple is LA, and total modulation wavelength of first foundation ripple is LB, so the maximum tunable optical progression of first foundation ripple is n=LB/LA, it is P1=k * LA/LB that first foundation wave impulse duty ratio is set in modulation, LA<LB wherein, 1≤k≤n-1,10≤n≤20;
B) operation wavelength of gaseous discharge lamp the second basic ripple is LA, and total modulation wavelength of the second basic ripple is LB, and it is P2=100%, wherein LA<LB that the second basic wave impulse duty ratio is set in modulation;
C) take total modulation wavelength as LM, first foundation ripple and the second basic ripple are carried out to secondary modulation, the maximum adjustable progression of secondary modulation is m=LM/LB, therefore the secondary modulation duty ratio is Qh=P2 * h/m+P1 * (m-h)/m, LB<LM wherein, 0≤h≤m, 80≤m≤120, h is larger for secondary modulation progression, and the secondary modulation duty ratio is larger, and gaseous discharge lamp is brighter.
2. a kind of gaseous discharge lamp pulse width modulation secondary light modulation method according to claim 1, is characterized in that described first foundation wave impulse duty ratio is 8%≤P1<100%.
3. a kind of gaseous discharge lamp pulse width modulation secondary light modulation method according to claim 2, is characterized in that described first foundation wave impulse duty ratio is 8%≤P1≤80%.
4. a kind of gaseous discharge lamp pulse width modulation secondary light modulation method according to claim 3, is characterized in that described first foundation wave impulse duty ratio is 8%≤P1≤50%.
5. a kind of gaseous discharge lamp pulse width modulation secondary light modulation method according to claim 4, is characterized in that described first foundation wave impulse duty ratio is 20%≤P1≤50%.
6. a kind of gaseous discharge lamp pulse width modulation secondary light modulation method according to claim 1, is characterized in that the total modulation wavelength LB >=50us of described light modulation for the first time.
7. a kind of gaseous discharge lamp pulse width modulation secondary light modulation method according to claim 1, the operation wavelength that it is characterized in that the light modulation for the first time of described gaseous discharge lamp is LA=4us, the total modulation wavelength of gaseous discharge lamp light modulation for the first time is LB=50us, and the minimum pulse duty ratio of setting gaseous discharge lamp light modulation for the first time is p=2 * LA/LB=16%.
8. a kind of gaseous discharge lamp pulse width modulation secondary light modulation method according to claim 1, it is characterized in that described gaseous discharge lamp with the total modulation wavelength LB=50us of light modulation for the first time for light modulation operation wavelength for the second time, the total modulation wavelength of gaseous discharge lamp light modulation for the second time is LM=5000us, and therefore light modulation progression has m=LM/LB=100 for the second time.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042158A (en) * | 2015-06-02 | 2015-11-11 | 浙江联辉智能科技有限公司 | Control method for proportional electromagnetic valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1800401A2 (en) * | 2004-10-12 | 2007-06-27 | Tir Systems Ltd. | Control apparatus and method with increased resolution for use with modulated light sources |
| CN102098847A (en) * | 2011-01-20 | 2011-06-15 | 广州市番禺区珠江灯光音响实业有限公司 | Field programmable gate array (FPGA)-based light-emitting diode (LED) dimming circuit |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1800401A2 (en) * | 2004-10-12 | 2007-06-27 | Tir Systems Ltd. | Control apparatus and method with increased resolution for use with modulated light sources |
| CN102098847A (en) * | 2011-01-20 | 2011-06-15 | 广州市番禺区珠江灯光音响实业有限公司 | Field programmable gate array (FPGA)-based light-emitting diode (LED) dimming circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042158A (en) * | 2015-06-02 | 2015-11-11 | 浙江联辉智能科技有限公司 | Control method for proportional electromagnetic valve |
| CN105042158B (en) * | 2015-06-02 | 2017-12-12 | 浙江联辉智能科技有限公司 | A kind of control method of proportion magnetic valve |
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