CN103052202A - Dimming method and device - Google Patents
Dimming method and device Download PDFInfo
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- CN103052202A CN103052202A CN2011103117009A CN201110311700A CN103052202A CN 103052202 A CN103052202 A CN 103052202A CN 2011103117009 A CN2011103117009 A CN 2011103117009A CN 201110311700 A CN201110311700 A CN 201110311700A CN 103052202 A CN103052202 A CN 103052202A
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Abstract
The invention relates to a light adjusting method and a device, which are characterized in that a phase comparison unit connected between a rectifying unit and an oscillating unit is arranged on the primary side of a voltage transformation unit of lighting equipment, the phase comparison unit obtains a frequency multiplication frequency signal of a pulse direct current signal output by the rectifying unit as a reference phase, and obtains a synchronous signal of a phase angle theta of an alternating current power supply signal and transmits the synchronous signal to a control end of the oscillating unit, so that the frequency of an oscillating circuit of the oscillating unit is synchronous with the phase angle theta of the frequency multiplication signal output by the rectifying unit, and the aim of preventing the phase of the alternating current power supply from causing the flicker of a light source of the lighting equipment due to the adjustment and change of a.
Description
Technical field
The light regulating technology of the relevant a kind of lighting apparatus of the present invention aims to provide a kind of can the end using light-emitting diode (LED) or cold cathode lamp (CCFL) to carry out light modulation and light-dimming method and the relative light modulating device of unlikely generation flicker as the lighting apparatus of light source in exchanging.
Background technology
Scientific and technological demand and national governments in carbon reduction will forbid under the policy of white flag bulb future successively, light-emitting diode (light emitting diode, LED) hold its high efficiency under the arm, advantage energy-conservation and the adjustable rotary photosensitiveness forms agitation gradually in illumination market, it has been the focus of attracting attention in the whole world in application such as street lamp, car light, outdoor lighting, situation illuminations.
Normal in the middle of traditional lighting technical field, often utilize dimmer to carry out the adjustment of lighting apparatus brightness; Similar dimmer (triac Tri-electrode AC switch for example, TRIAC) its turn-on condition of Main Basis provides the illumination effect of voltage with semifixed resistor formula lighting apparatus luminescence component (such as Halogen lamp LED, tungsten lamp etc.), therefore the dimmer of inside can divide with lighting apparatus be arranged (for example dimmer being arranged on the wall appropriate location) at home, reaches the purpose that makes things convenient for the user to adjust brightness of illumination.
Moreover, use light-emitting diode (LED) or cold cathode lamp (CCFL) to utilize transformer that the civil power alternating current is converted to low-voltage DC as the lighting apparatus of light source and boost/frequency conversion through a DC-AC again for LED or its CCFL need, namely driven by this circuit and luminous.Because the circuit characteristic of light-emitting diode (LED) presents capacitance characteristic, in the light-source brightness that directly sees through dimmer control LED bulb, the phenomenon of flicker when moving, dimmer (TRIAC) can can't consequently occur synchronously because waveform is cut.
Therefore, in the streets see through first the dimming control unit that is formed by a dimmer and voltage transformation unit by a kind of light emitting diode lighting equipment the mains ac power supply of inputting is adjusted into the light modulation AC power, see through again the central voltage doubling unit of a drive unit with light modulation AC power multiplication of voltage and be converted into DC power supply, use and make driving DC power supply that multiplication of voltage produces in the operating voltage range of light modulation driver element, use the driving light-emitting diode, and avoid light-emitting diode when light modulation, to glimmer.Only, so design not only so that the line architecture of integrally adjusting light is tending towards complicated, and the interchangeability of lighting apparatus itself is lower, also relatively increases the manufacturing cost of lighting apparatus.
Summary of the invention
In view of this, the present invention namely can in exchanging end to using light-emitting diode (LED) or cold cathode lamp (CCFL) to carry out light modulation and light-dimming method and the relative light modulating device of unlikely generation flicker as the lighting apparatus of light source, be its main purpose providing a kind of.
For reaching above-mentioned purpose, a kind of light-dimming method of the present invention mainly is provided with a phase comparison unit that is connected between rectification unit and the oscillating unit in the voltage transformation unit primary side of lighting apparatus, utilize this phase comparison unit to obtain the frequency multiplication frenquency signal of the pulse direct current signal of exporting through rectification unit as fixed phase, and obtain the control end that ac supply signal θ phase angle sync signal is sent to oscillating unit, make the double frequency signal θ phase angle of the oscillating circuit frequency of oscillating unit and rectification unit output synchronous, and reach avoid AC power phase place because being subjected to dimmer (TRAIC) adjustment to change the purpose that causes the lighting apparatus light source to glimmer.
A kind of light modulating device of the present invention includes: a rectification unit, an oscillating unit, a voltage transformation unit, and a phase comparison unit; Wherein, this rectification unit is for obtaining interchange string signal period of wave of civil power and being converted to a pulse direct current signal with full string type wave shape of positive period; This oscillating unit in order to the pulse direct current signal of obtaining this rectification unit with as the accurate signal in position to determine output power turn-on cycle signal; This voltage transformation unit receives continuous voltage pulse wave signal for corresponding each voltage pulse signal, and complies with the input voltage start output voltage of each voltage pulse signal to the photoelectric subassembly of lighting apparatus.
As for, this phase comparison unit supplies to obtain the frequency multiplication frenquency signal of the pulse direct current signal of exporting through rectification unit as fixed phase, and obtain the control end that ac supply signal θ phase angle sync signal is sent to oscillating unit, make the double frequency signal θ phase angle of the oscillating circuit frequency of oscillating unit and rectification unit output synchronous.And reach the phase place of avoiding AC power because being subjected to dimmer (TRAIC) adjustment to change the purpose that causes the flicker of lighting apparatus light source.
According to above-mentioned primary structure feature, described phase comparison unit further includes: a bleeder circuit, a filter circuit, a clamp circuit, and a switch module; Wherein, this bleeder circuit for the frequency multiplication frenquency signal of the pulse direct current signal of obtaining rectification unit as fixed phase; This filter circuit is in order to reduce the noise of this frequency multiplication frenquency signal; This clamp circuit in order to the voltage that limits this frequency multiplication frenquency signal between 5 ~ 10V; When this switch module is set in this frequency multiplication frenquency signal and is Low, this not conducting of switch module (for open circuit), and when being set in this frequency multiplication frenquency signal and being High, this switch module conducting (for closing the road), then make the synchronous starting of oscillation of this oscillating unit this moment, and reach the synchronous purpose in double frequency signal θ phase angle of the oscillating circuit frequency that makes this oscillating unit and whole this stream unit exporting.
Above-mentioned switch module can for electric crystal, MOSFET, OP comparator one of them.
According to above-mentioned primary structure feature, described rectification unit and this oscillating unit be electrically connected with a power factor control unit (PFC).
The present invention can produce following effect.
1. can produce the problem of flicker when but efficient solution uses light-emitting diode (LED) or cold cathode lamp (CCFL) to see through dimmer (TRIAC) light modulation as the lighting apparatus of light source.
2. can utilize dimmer (TRIAC) to carry out light modulation in exchanging end, significantly simplify the light modulation circuit of lighting apparatus, and the manufacturing cost of reduction lighting apparatus.
3. can utilize dimmer (TRIAC) to carry out light modulation in exchanging end, significantly increase the interchangeability of lighting apparatus.
Description of drawings
Fig. 1 is light modulating device basic composition Organization Chart of the present invention.
Fig. 2 is the phase comparison unit circuit framework figure of a preferred embodiment of the present invention.
The figure number explanation:
10 rectification units
20 oscillating units
30 voltage transformation unit
40 phase comparison units
41 bleeder circuits
42 filter circuits
43 clamp circuits
44 switch modules
50 photoelectric subassemblys
60 power control unit (PFC).
Embodiment
The present invention mainly provides a kind of and can hold using light-emitting diode (LED) or cold cathode lamp (CCFL) to carry out light modulation and light-dimming method and the relative light modulating device of unlikely generation flicker as the lighting apparatus of light source in exchanging; As shown in Figure 1, a kind of light-dimming method of the present invention mainly is provided with a phase comparison unit 40 that is connected between rectification unit 10 and the oscillating unit 20 in voltage transformation unit 30 primary sides of lighting apparatus, utilize this phase comparison unit 40 to obtain the frequency multiplication frenquency signal of the pulse direct current signal of exporting through rectification unit 10 as fixed phase, and obtain the control end that ac supply signal θ phase angle sync signal is sent to oscillating unit 20, make the double frequency signal θ phase angle of the oscillating circuit frequency of oscillating unit 20 and rectification unit 10 outputs synchronous, and reach avoid AC power phase place because being subjected to dimmer (TRAIC) adjustment to change the purpose that causes the lighting apparatus light source to glimmer.
Please cooperate simultaneously with reference to shown in Figure 2, a kind of light modulating device of the present invention includes: a rectification unit 10, an oscillating unit 20, a voltage transformation unit 30, and a phase comparison unit 40.
Wherein: this rectification unit 10 is for obtaining interchange string signal period of wave of civil power and being converted to a pulse direct current signal with full string formula of positive period.This oscillating unit 20 in order to the pulse direct current signal of obtaining this rectification unit 10 with as the accurate signal in position to determine output power turn-on cycle signal; This voltage transformation unit 30 receives continuous voltage pulse wave signal for corresponding each voltage pulse signal, and comply with the input voltage start output voltage of each voltage pulse signal to the photoelectric subassembly 50 of lighting apparatus, this photoelectric subassembly 50 can be light-emitting diode (LED) or cold cathode lamp (CCFL).
As for, this phase comparison unit 40 supplies to obtain the frequency multiplication frenquency signal of the pulse direct current signal of exporting through rectification unit 10 as fixed phase, and obtain the control end that ac supply signal θ phase angle sync signal is sent to oscillating unit 20, make the double frequency signal θ phase angle of the oscillating circuit frequency of oscillating unit 20 and rectification unit output synchronous.And reach the phase place of avoiding AC power because being subjected to dimmer (TRAIC) adjustment to change the purpose that causes the flicker of lighting apparatus light source.Certainly, the integrally adjusting light device can further be electrically connected with a power control unit (PFC) 60 and use raising electric energy utilization rate between this rectification unit 10 and this oscillating unit 20.
The present invention is when implementing, and above-mentioned phase comparison unit 40 further includes: a bleeder circuit 41, a filter circuit 42, a clamp circuit 43, and a switch module 44.
Wherein: this bleeder circuit 41 for the frequency multiplication frenquency signal of the pulse direct current signal of obtaining rectification unit 10 as fixed phase; This filter circuit 42 is in order to reduce the noise of this frequency multiplication frenquency signal; This clamp circuit 43 in order to the voltage that limits this frequency multiplication frenquency signal between 5 ~ 10V.
As for, this switch module 44 can be electric crystal, MOSFET, OP comparator, it is electric crystal among the embodiment as shown in the figure, main when being set in this frequency multiplication frenquency signal and being Low, this not conducting of electric crystal (for open circuit), and when being set in this frequency multiplication frenquency signal and being High, this electric crystal conducting (for closing the road), then make this oscillating unit 20 synchronous starting of oscillations this moment, and reach the synchronous purpose in double frequency signal θ phase angle of the oscillating circuit frequency that makes this oscillating unit 20 and whole this stream unit 10 exporting.
Compare with traditional located by prior art, the disclosed light-dimming method of the present invention and relative light modulating device can produce the problem of flicker when can efficient solution using light-emitting diode (LED) or cold cathode lamp (CCFL) to see through dimmer (TRIAC) light modulation as the lighting apparatus of light source; Especially, the disclosed light-dimming method of the present invention and relative light modulating device can utilize dimmer (TRIAC) to carry out light modulation in exchanging end, significantly simplify the light modulation circuit of lighting apparatus, reduce the manufacturing cost of lighting apparatus, more so significantly increase the interchangeability of lighting apparatus.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103117009A CN103052202A (en) | 2011-10-14 | 2011-10-14 | Dimming method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103117009A CN103052202A (en) | 2011-10-14 | 2011-10-14 | Dimming method and device |
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| CN103052202A true CN103052202A (en) | 2013-04-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1579115A (en) * | 2002-02-20 | 2005-02-09 | 松下电器产业株式会社 | Electrodeless discharge lamp lighting device, light bulb type electrodeless fluorescent lamp and discharge lamp lighting device |
| CN1797922A (en) * | 2004-12-27 | 2006-07-05 | 株式会社东芝 | Switching power supply device and method of controlling the switching device |
| CN101217848A (en) * | 2007-12-27 | 2008-07-09 | 李东方 | A dual-frequency mixed spectrum type and pulse width regulation type dimming electronic ballast |
| CN201499347U (en) * | 2009-06-29 | 2010-06-02 | 潘忠浩 | Light dimming and speed regulating control circuit |
| JP4744966B2 (en) * | 2005-07-26 | 2011-08-10 | パナソニック電工株式会社 | DC power supply device for light emitting diode and lighting apparatus using the same |
-
2011
- 2011-10-14 CN CN2011103117009A patent/CN103052202A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1579115A (en) * | 2002-02-20 | 2005-02-09 | 松下电器产业株式会社 | Electrodeless discharge lamp lighting device, light bulb type electrodeless fluorescent lamp and discharge lamp lighting device |
| CN1797922A (en) * | 2004-12-27 | 2006-07-05 | 株式会社东芝 | Switching power supply device and method of controlling the switching device |
| JP4744966B2 (en) * | 2005-07-26 | 2011-08-10 | パナソニック電工株式会社 | DC power supply device for light emitting diode and lighting apparatus using the same |
| CN101217848A (en) * | 2007-12-27 | 2008-07-09 | 李东方 | A dual-frequency mixed spectrum type and pulse width regulation type dimming electronic ballast |
| CN201499347U (en) * | 2009-06-29 | 2010-06-02 | 潘忠浩 | Light dimming and speed regulating control circuit |
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Application publication date: 20130417 |