CN101368710A - Light modulation power supply and light modulation lamp - Google Patents
Light modulation power supply and light modulation lamp Download PDFInfo
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- CN101368710A CN101368710A CNA2008102011414A CN200810201141A CN101368710A CN 101368710 A CN101368710 A CN 101368710A CN A2008102011414 A CNA2008102011414 A CN A2008102011414A CN 200810201141 A CN200810201141 A CN 200810201141A CN 101368710 A CN101368710 A CN 101368710A
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- power supply
- light modulation
- rectifier
- modulation power
- light
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Abstract
Disclosed are a light-adjusting power supply and a light-adjusting lamp which comprise a rectifier and a controllable silicon light adjuster connected with the power supply side of the rectifier; the light-adjusting power supply and the light-adjusting lamp are characterized in that a flash elimination resistor is in bridge connection with two power wires between the rectifier and the controllable silicon light-adjuster. At least a LED used as the light source load is connected between the other end without serial connection of the rectifier of the light-adjusting lamp and the other output end of the rectifier. The light-adjusting power supply and the light-adjusting lamp eliminate the flash phenomenon generated when the light source used as the load is adjusted to be in the low brightness.
Description
Technical field
The present invention relates to a kind of light modulation power supply, and the desk lamp with dimmer switch that comprises this light modulation power supply.
Background technology
In the prior art, light modulation power supply commonly used is to light source load power supply and can carry out brightness regulation control to the brightness of the light source in the light source load, to realize the illumination of Dimmable.One class light modulation power supply is arranged, and the mains side at its rectifier is connected to controllable silicon dimmer usually.For this light modulation power supply, when the brightness regulation of its load light source anomaly being occurred when low by controllable silicon dimmer.For example, when load light source was light emitting diode, irksome phosphere can appear in this moment, that is to say that phosphere can appear in light source in the process of brightness regulation.
Summary of the invention
The present invention is in order to address the above problem, and its purpose is to provide a kind of light modulation power supply that can not occur phosphere in the light-source brightness adjustment process.
Light modulation power supply of the present invention comprises rectifier and the controllable silicon dimmer that is connected the mains side of rectifier, it is characterized in that, cross-over connection has the lightning of disappearing resistance on two power lines between rectifier and the controllable silicon dimmer.
Desk lamp with dimmer switch of the present invention, it is characterized in that, comprise light modulation power supply of the present invention, and be connected to the load that comprises at least one light emitting diode between the other end in the output of the rectifier of the other end that is not connected in series of the current limiter of light modulation power supply and light modulation power supply.
As above the light modulation power supply of the present invention and the desk lamp with dimmer switch of Gou Chenging because parallel connection has inserted the lightning resistance that disappears on the two ends of the power input of rectifier, thereby has the effect that can not occur glistening when the light source as load is adjusted to low-light level.
Description of drawings
Fig. 1 is the light modulation power supply of demonstration one embodiment of the invention and the electrical schematic diagram of desk lamp with dimmer switch.
The specific embodiment
Fig. 1 shows the light modulation power supply of the embodiment of the invention and the electrical schematic diagram of desk lamp with dimmer switch.Referring to Fig. 1, the light modulation power supply comprises rectifier 1, is connected the mains side of rectifier 1 controllable silicon dimmer 2 in (left side among Fig. 1).The improvements of light modulation power supply of the present invention are, two power line m between rectifier 1 and controllable silicon dimmer 2, and the last cross-over connection of n has the lightning of disappearing resistance RD.Desk lamp with dimmer switch of the present invention utilizes the light modulation power supply to constitute.Desk lamp with dimmer switch comprises light modulation power supply and light source load LD, and light source load LD inserts the outlet side (right side among Fig. 1) of rectifier 1, by rectifier 1 to light source load powered lighting.When this light modulation power supply was used for light source load LD powered, controllable silicon dimmer 2 was used to regulate the brightness of light source.The lightning that disappears resistance RD be used for when the light modulation power supply when light source load LD power, eliminate the phosphere that light source is adjusted to brightness appearance when hanging down.Controllable silicon dimmer is associated between AC power AC and the rectifier 1 for 2 grades.In one embodiment, this cascade is to finish by controllable silicon dimmer 2 is inserted in one of two power lines (not shown) in the mode of series connection.
So-called mains side is meant a side at the AC power AC place of rectifier 1.So-called outlet side is meant the side of rectifier 1 to light source load LD power supply, also is two output a of rectifier 1, a side at b place.So-called power line is meant the mains side at rectifier 1, the voltage of AC power AC, the voltage of AC power AC through one of the voltage after the transformer transformation or the former two kinds of voltages pulsating volage after controllable silicon dimmer 2 regulation and control the route of process.
Continuation is referring to Fig. 1, the embodiment of another routine light modulation power supply and desk lamp with dimmer switch, and on the basis of the foregoing description, as the two output as of light modulation power supply at rectifier 1, an end among the b is for example held a, is connected in series with current limiter RL, and promptly this end a couples the end of current limiter RL.What is called couples the indirect connection by another member of the direct connection that is meant two ends or two ends.As the light source load LD of desk lamp with dimmer switch, be connected the other end in the output of rectifier 1 of the other end that is not connected in series of current limiter RL and light modulation power supply, for example hold b, between.Perhaps, light source load LD inserts the outlet side of rectifier 1, and the output a of rectifier 1, and b, current limiter RL and light source load LD three are the relation of being connected in series.Current limiter RL is used for the electric current of the light source load LD that flows through is carried out current limliting or constant current.
Usually current limiter RL can be a resistance.In order to make full use of supply voltage, promptly under certain supply voltage, drive the light emitting diode work as the light source load as much as possible, current limiter RL also voltage available regulates constant current device, for example LM117, LM317, LM388 etc., substitutional resistance.In order to improve the electric current that the voltage-regulation constant current device powers to the load or to reduce the power consumption of voltage-regulation constant current device, can adopt enhancement mode voltage to regulate the constant current device instead of voltage and regulate constant current device.So-called enhancement mode voltage adjusting constant current device is exactly to be electrically connected with shunt resistance between the input of existing voltage-regulation constant current device and output.When current limiter RL adopted voltage-regulation constant current device or enhancement mode voltage to regulate constant current device, the input of voltage-regulation constant current device was the end of current limiter RL, and the output of voltage-regulation constant current device is the other end of current limiter RL.
In order to reduce pulsating nature to light source load LD power supply, can be as desk lamp with dimmer switch at light source load LD two ends shunt capacitance C, perhaps as the light modulation power supply, can be at the other end that is not connected in series of current limiter RL and the output a of rectifier 1, the other end among the b is for example held b, between be connected to capacitor C.
1 pair of voltage formed pulsating volage behind controllable silicon dimmer 2 from AC power AC of rectifier carries out rectification, and rectification is after two output a of rectifier 1, b output.This output is used for the light illumination among the light source load LD.In this embodiment, rectifier 1 is a bridge rectifier, but also available half-wave rectifier or full-wave rectifier substitute.
In order to adapt to the needs of different AC power AC, variation example as the foregoing description, light modulation power supply and desk lamp with dimmer switch also can comprise the transformer (not shown), and this transformer can level be associated between rectifier 1 and the lightning that the disappears resistance RD or grade be associated between controllable silicon dimmer 2 and the AC power AC.
As light source load LD, as shown in Figure 1, be a string light emitting diode.But also can be single, or incandescent lamp such as electricity-saving lamps such as light emitting diode, fluorescent lamps.When light source load LD was a plurality of light emitting diode, they can be series connection, and parallel connection or series-multiple connection connect (not shown).When they or some of them are when being connected in series, each light emitting diode that is connected in series can a resistance in parallel (not shown), influences the normal illumination of other light emitting diode when damaging to prevent this light emitting diode.
Below in conjunction with the accompanying drawings the present invention is had been described in detail, those skilled in the art are according to design of the present invention that specification disclosed, also can make other various variation examples except that the variation exception of describing in the specification, therefore described embodiment of this specification and variation example thereof should not constitute limitation of the invention, and should be limited the present invention with the appended claims that embodies the present invention's design.
Claims (11)
1. a light modulation power supply comprises rectifier and the controllable silicon dimmer that is connected the mains side of rectifier, it is characterized in that,
Cross-over connection has the lightning of disappearing resistance on two power lines between rectifier and the controllable silicon dimmer.
2. light modulation power supply as claimed in claim 1 is characterized in that, is connected in series with current limiter with an end in two outputs of rectifier.
3. light modulation power supply as claimed in claim 2 is characterized in that described current limiter is a resistance.
4. light modulation power supply as claimed in claim 2 is characterized in that, described current limiter is the voltage-regulation constant current device.
5. light modulation power supply as claimed in claim 2 is characterized in that, described current limiter is that enhancement mode voltage is regulated constant current device.
6. as the described light modulation power supply of the arbitrary claim of claim 2 to 5, it is characterized in that, be connected to electric capacity between the other end in the output of the other end that is not connected in series of current limiter and rectifier.
7. as the described light modulation power supply of the arbitrary claim of claim 1 to 5, it is characterized in that level is associated with transformer between described rectifier and the described lightning resistance of disappearing or between described controllable silicon dimmer and AC power.
8. light modulation power supply as claimed in claim 6 is characterized in that, level is associated with transformer between described rectifier and the described lightning resistance of disappearing or between described controllable silicon dimmer and AC power.
9. a desk lamp with dimmer switch is characterized in that, comprises the described light modulation power supply of claim 1, and is connected with the light source load at the outlet side of the rectifier of light modulation power supply.
10. desk lamp with dimmer switch, it is characterized in that, comprise the described light modulation power supply of the arbitrary claim of claim 2 to 8, and be connected to the light source load between the other end in the output of the rectifier of the other end that is not connected in series of the current limiter of light modulation power supply and light modulation power supply.
11., it is characterized in that described light source load comprises at least one light emitting diode as claim 9 or 10 described desk lamps with dimmer switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102011414A CN101368710A (en) | 2008-10-14 | 2008-10-14 | Light modulation power supply and light modulation lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102011414A CN101368710A (en) | 2008-10-14 | 2008-10-14 | Light modulation power supply and light modulation lamp |
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| Publication Number | Publication Date |
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| CN101368710A true CN101368710A (en) | 2009-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008102011414A Pending CN101368710A (en) | 2008-10-14 | 2008-10-14 | Light modulation power supply and light modulation lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679191A (en) * | 2011-03-11 | 2012-09-19 | 深圳市钧多立实业有限公司 | Intelligent light source with adjustable color temperature |
| CN102804923A (en) * | 2009-06-11 | 2012-11-28 | 松下电器产业株式会社 | Lighting device and lighting system |
-
2008
- 2008-10-14 CN CNA2008102011414A patent/CN101368710A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102804923A (en) * | 2009-06-11 | 2012-11-28 | 松下电器产业株式会社 | Lighting device and lighting system |
| CN102679191A (en) * | 2011-03-11 | 2012-09-19 | 深圳市钧多立实业有限公司 | Intelligent light source with adjustable color temperature |
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Open date: 20090218 |