CN107070197A - Power supply circuit and projection arrangement - Google Patents
Power supply circuit and projection arrangement Download PDFInfo
- Publication number
- CN107070197A CN107070197A CN201611251777.0A CN201611251777A CN107070197A CN 107070197 A CN107070197 A CN 107070197A CN 201611251777 A CN201611251777 A CN 201611251777A CN 107070197 A CN107070197 A CN 107070197A
- Authority
- CN
- China
- Prior art keywords
- choke coil
- power supply
- unit
- supply circuit
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
Abstract
The invention discloses a kind of power supply circuit and projection arrangement.Power supply circuit includes power-supply unit, ballast unit and anti-noise cancellation circuit.The two ends of the ballast unit are respectively coupled to the power-supply unit and electrical equipment, and the ballast unit has choke coil；The anti-noise cancellation circuit includes the signal output unit and signaling control unit being mutually coupled, and the signaling control unit couples the choke coil；During the electrical equipment starts, the signal output unit exports the first signal, and the signaling control unit controls the choke coil normal work according to first signal, so that the electrical equipment smoothly starts；During the electrical equipment normal work, the signal output unit exports secondary signal, and the signaling control unit controls the choke coil to be stopped according to the secondary signal, so as to can both prevent choke coil from producing noise, the energy expenditure of choke coil is reduced again, reaches the effect of energy-conservation.
Description
Technical field
The present invention relates to a kind of power supply circuit and projection arrangement, more particularly to it is a kind of have prevent the power supply of noise from supplying
Answer the projection arrangement of circuit.
Background technology
In recent years, giant-screen turns into display field most popular keyword, and the product for being in giant-screen leading position is non-
Projection arrangement does not belong to, and with the decline of projection arrangement price and its enriching for function, home projector device market obtains preceding institute not
Some development opportunities.In actual production process, power supply circuit is the important component of projection arrangement, if power supply supply electricity
Road design is not good, easily causes projection arrangement to have noise generation when in use, which part reason comes from gripping in ballast
Stream circle, coil and magnetic core especially in choke coil.For example, it is 60 hertz (Hz) to work as by the frequency of the signal of choke coil, this
It is the frequency that human ear can be heard, now user will hear the noise sent by choke coil, have impact on customer experience.
The content of the invention
It is an object of the invention to provide a kind of power supply circuit, to solve in the prior art, power supply circuit is operationally
The problem of with noise.
In order to solve the above-mentioned technical problem, the present invention proposes a kind of power supply circuit, including power-supply unit, ballast
Unit and anti-noise cancellation circuit.The two ends of ballast unit are respectively coupled to the power-supply unit and electrical equipment, ballast unit tool
There is choke coil；Anti- noise cancellation circuit includes the signal output unit and signaling control unit being mutually coupled, signaling control unit coupling
The choke coil；During the electrical equipment starts, the signal output unit exports the first signal, and the signaling control unit is according to this
First signal controls the choke coil normal work, so that the electrical equipment smoothly starts；During the electrical equipment normal work,
The signal output unit exports secondary signal, and the signaling control unit controls the choke coil to be stopped according to the secondary signal.
As optional technical scheme, first signal is low level signal, and the secondary signal is high level signal.
As optional technical scheme, the signaling control unit includes relay, and the relay is parallel to the choke coil, in
During the electrical equipment starts, the signaling control unit controls the cut-off according to first signal, so that the choke coil
Normal work；During the electrical equipment normal work, the signaling control unit controls the relay to open according to the secondary signal
Open, so that the choke coil is stopped.
As optional technical scheme, the relay has the first contact and the second contact, first contact and this
Two point connects the two ends of the choke coil respectively.
As optional technical scheme, the relay has coil, and the coil has first end and the second end, the signal control
Unit processed includes the first diode and first switch, the first switch be coupled to first diode and the signal output unit it
Between, the positive pole of first diode couples the first switch and second end of the coil, the negative pole coupling of first diode
The first end of DC voltage unit and the coil.
As optional technical scheme, the DC voltage unit provides 12V DC voltages.
As optional technical scheme, the first switch is NPN transistor, and the base stage of the NPN transistor is coupled to
The signal output unit, the grounded emitter of the NPN transistor, the colelctor electrode of the NPN transistor is coupled to the one or two
The positive pole of pole pipe.
As optional technical scheme, the signaling control unit also includes first resistor, and one end of the first resistor is connected
The signal output unit, the other end of the first resistor connects the base stage of the NPN transistor.
As optional technical scheme, the power supply circuit also includes capacitor cell, and one end of the capacitor cell is coupled
The power-supply unit, the other end of the capacitor cell couples the choke coil.
In addition, the present invention also proposes a kind of projection arrangement, above-mentioned power supply circuit is included.
The power supply circuit and projection arrangement of the present invention, it is additionally provided with noise control unit, in the electrical equipment starting period
Between, the choke coil normal work in ballast unit is can control, to help electrical equipment smoothly to start, in electrical equipment normal work
Period, noise control unit may be such that choke coil is stopped, so as to can both prevent choke coil from producing noise, choke coil is reduced again
Energy expenditure, reach the effect of energy-conservation.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Brief description of the drawings
Fig. 1 is the block diagram of the power supply circuit of the present invention；
Fig. 2 is the local circuit Organization Chart of the power supply circuit of the present invention.
Embodiment
The explanation of following embodiment is the particular implementation implemented to illustrate the present invention can be used to reference to additional schema
Example.The direction term that the present invention is previously mentioned, is only reference such as " on ", " under ", "front", "rear", "left", "right", " side "
The direction of annexed drawings.Therefore, the direction term used is to illustrate and understand the present invention, and is not used to the limitation present invention.
In the examples below, in various figures, same section is represented with identical label.
Fig. 1 is refer to, Fig. 1 is the block diagram of the power supply circuit of the present invention.Power supply circuit 1000 includes power supply
Feeding unit 100, ballast unit 200 and noise control unit 300.As shown in figure 1, the two ends of ballast unit 200 are respectively coupled to electricity
Source feeding unit 100 and electrical equipment 2000, ballast unit 200 have choke coil L3.Noise control unit 300 includes what is be mutually coupled
Signal output unit 310 and signaling control unit 320, the coupling choke coil of signaling control unit 320 L3.Opened in electrical equipment 2000
During dynamic, signal output unit 310 exports the first signal S1, and signaling control unit 320 controls choke coil according to the first signal S1
L3 normal works, so that electrical equipment 2000 smoothly starts；During the normal work of electrical equipment 2000, signal output unit
310 output secondary signal S2, signaling control unit 320 controls choke coil L3 to be stopped according to secondary signal S2.
In practical operation, power supply circuit 100 can be applied in projection arrangement, and electrical equipment 2000 is, for example, to project dress
The bulb put.Be during the startup of electrical equipment 2000 projection arrangement the lighting of bulb during, due to chokes during this period
L3 normal works are enclosed, so as to produce instantaneous pressure smoothly lighting in favor of bulb to the bulb of projection arrangement.Electrical equipment
Be during 2000 normal work projection arrangement bulb normal illumination during, because choke coil L3 during this period stops work
Make, can be by choke coil L3 (the also coil and magnetic core with regard to that can pass through without signal in choke coil L3), so that it is not without signal
Noise can be produced.In practical operation, the startup time of electrical equipment 2000 is typically all shorter, the bulb of such as projection arrangement,
Typically not over five seconds, and the normal working hours of electrical equipment 2000 is then relatively long, because choke coil L3 is in electricity consumption
It is stopped during the normal work of equipment 2000, in other words, choke coil L3 is only during shorter electrical equipment 2000 starts
Consumed energy, and the not consumed energy during the longer normal work of electrical equipment 2000, so as to substantially reduce energy effect,
Both the generation of noise had been prevented, the effect with energy-conservation.
Fig. 2 is refer to, Fig. 2 is the local circuit Organization Chart of the power supply circuit of the present invention.As shown in Fig. 2 signal control
Unit 320 processed includes relay RL1, and relay RL1 is parallel to choke coil L3.During electrical equipment 2000, signal control is single
Member 320 is closed according to the first signal S1 control relays RL1, so that choke coil L3 normal works, so as to help electrical equipment
2000 smoothly start；Signaling control unit 320 is opened according to secondary signal S2 control relays RL1, so that choke coil L3 stops
Work.
As shown in Fig. 2 relay RL1 has the first contact 331 and the second contact 332, the first contact 331 and second
Contact 332 connects choke coil L3 two ends respectively.In addition, relay RL1 can have coil 330, coil 330 has first end p
And the second end q, signaling control unit 320 includes the first diode D91 and first switch Q91, and first switch Q91 is coupled to first
Between diode D91 and signal output unit 310, the first diode D91 positive pole coupling first switch Q91 and coil 340
Second end q, the first diode D91 negative pole coupling DC voltage unit 340 and the first end p of coil 330.In the present embodiment,
DC voltage unit 340 provides 12V DC voltages.
As shown in Fig. 2 in practical operation, first switch Q91 can be NPN transistor, the base stage b of the NPN transistor
Couple signal output unit 310, the emitter e ground connection of the NPN transistor, the colelctor electrode c couplings first of the NPN transistor
Diode D91 positive pole.In practical operation, signaling control unit 320 also includes first resistor R91, first resistor R91 one end
Signal output unit 310 is connected, the first resistor R91 other end connects the base stage B of the NPN transistor.
As shown in Fig. 2 power supply circuit 100 is also comprising the first inductance Z45, the first inductance Z45 coupling electrical equipment
2000。
It is specifically described below with power supply circuit 100 applied to projection arrangement.In the starting period of electrical equipment 2000
Between, i.e., bulb is not from working smoothly lighting period, and signal output unit 310 is exported in the first signal S1, the present embodiment, the first letter
Number S1 is low level signal, because the base stage b of the NPN transistor couples signal output unit 310, when base stage b receive it is low
During level signal, the NPN transistor is not turned on, therefore the colelctor electrode c of NPN transistor current potential is high potential.Due to this
Coil 330 in the colelctor electrode c coupling relays RL1 of NPN transistor so that relay RL1 closes (i.e. without work),
And then choke coil L3 will not be influenceed by relay RL1, it can be with normal work, to help electrical equipment 2000 normally to open
It is dynamic, in the present embodiment, you can provide instantaneous pressure to help the bulb of projection arrangement normally to light.
During the normal work of electrical equipment 2000, in the present embodiment be projection arrangement bulb normal illumination during,
Signal output unit 310 is exported in secondary signal S2, the present embodiment, and secondary signal S2 is different from the first signal S1, secondary signal
S2 is high level signal.Likewise, because the base stage b of the NPN transistor couples signal output unit 310, when base stage b is received
During to high level signal, the NPN transistor is opened, therefore the colelctor electrode c of NPN transistor current potential is low level.Due to
The colelctor electrode c of the NPN transistor is coupled to the coil 330 in relay RL1 so that relay RL1 is opened.Relay RL1
Normally closed contact 331 and common junction 332 be coupled to choke coil L3 two ends so that the current potential at choke coil L3 two ends is identical, grips
Stream circle L3 is short-circuited, so as to be stopped, signal stream is not had and (is flowed through through choke coil L3 there will be no signal in choke coil L3 yet
Element, such as coil, magnetic core), therefore choke coil L3 is interior during this period will not produce noise.
The power supply circuit and projection arrangement of the present invention, it is additionally provided with noise control unit, in the electrical equipment starting period
Between, the choke coil normal work in ballast unit is can control, to help electrical equipment smoothly to start, in electrical equipment normal work
Period, noise control unit may be such that choke coil is stopped, so as to can both prevent choke coil from producing noise, choke coil is reduced again
Energy expenditure, reach the effect of energy-conservation.
By the above detailed description of preferred embodiments, it is intended to more clearly describe the feature and spirit of the present invention,
And not protection scope of the present invention is any limitation as with above-mentioned disclosed preferred embodiment.On the contrary, its purpose
It is intended to cover being arranged in the scope of the claims of the invention to be applied for various changes and tool equality.Cause
This, apllied scope of the claims of the invention should make most broad explanation according to above-mentioned explanation, to cause it
Cover all possible change and the arrangement of tool equality.
Claims (10)
1. a kind of power supply circuit, it is characterised in that including：
Power-supply unit；
Ballast unit, its two ends are respectively coupled to the power-supply unit and electrical equipment, and the ballast unit has choke coil；And
Anti- noise cancellation circuit, comprising the signal output unit and signaling control unit being mutually coupled, the signaling control unit couples this and gripped
Stream circle；
In the electrical equipment start during, the signal output unit export the first signal, the signaling control unit according to this first
Signal controls the choke coil normal work, so that the electrical equipment smoothly starts；
During the electrical equipment normal work, signal output unit output secondary signal, the signaling control unit is according to this
Secondary signal controls the choke coil to be stopped.
2. power supply circuit according to claim 1, it is characterised in that：First signal is low level signal, and this
Binary signal is high level signal.
3. power supply circuit according to claim 1, it is characterised in that：The signaling control unit includes relay, should
Relay is parallel to the choke coil, during the electrical equipment starts, and the signaling control unit should according to first signal control
Cut-off, so that the choke coil normal work；During the electrical equipment normal work, the signaling control unit is according to this
Secondary signal controls the relay to open, so that the choke coil is stopped.
4. power supply circuit according to claim 1, it is characterised in that：The relay has the first contact and second
Contact, first contact and second contact connect the two ends of the choke coil respectively.
5. power supply circuit according to claim 4, it is characterised in that：The relay has coil, and the coil has
First end and the second end, the signaling control unit include the first diode and first switch, the first switch be coupled to this first
Between diode and the signal output unit, the positive pole of first diode couple the first switch and the coil this second
End, the negative pole coupling DC voltage unit and the first end of the coil of first diode.
6. power supply circuit according to claim 5, it is characterised in that：The DC voltage unit provides 12V direct currents
Pressure.
7. power supply circuit according to claim 5, it is characterised in that：The first switch is NPN transistor, should
The base stage of NPN transistor is coupled to the signal output unit, the grounded emitter of the NPN transistor, the NPN transistor
Colelctor electrode be coupled to the positive pole of first diode.
8. power supply circuit according to claim 7, it is characterised in that：The signaling control unit is also comprising the first electricity
Resistance, one end of the first resistor connects the signal output unit, and the other end of the first resistor connects the base of the NPN transistor
Pole.
9. power supply circuit according to claim 1, it is characterised in that：The power supply circuit also includes electric capacity list
Member, one end of the capacitor cell couples the power-supply unit, and the other end of the capacitor cell couples the choke coil.
10. a kind of projection arrangement, it is characterised in that include：
Power supply circuit as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251777.0A CN107070197A (en) | 2016-12-30 | 2016-12-30 | Power supply circuit and projection arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251777.0A CN107070197A (en) | 2016-12-30 | 2016-12-30 | Power supply circuit and projection arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107070197A true CN107070197A (en) | 2017-08-18 |
Family
ID=59623524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611251777.0A Pending CN107070197A (en) | 2016-12-30 | 2016-12-30 | Power supply circuit and projection arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107070197A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2893892Y (en) * | 2006-04-04 | 2007-04-25 | 刁久新 | Starting protective switch |
| CN102739145A (en) * | 2011-04-06 | 2012-10-17 | 张家港新特变科技有限公司 | Starting method of magnetic voltage regulator |
| CN203896575U (en) * | 2014-05-23 | 2014-10-22 | 成都东旭节能科技有限公司 | Adjustable circuit suitable for dimmable electrodeless lamp ballast |
| CN104540265A (en) * | 2014-11-21 | 2015-04-22 | 南京大学 | Low-cost omnidirectional fully-compatible driving device |
-
2016
- 2016-12-30 CN CN201611251777.0A patent/CN107070197A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2893892Y (en) * | 2006-04-04 | 2007-04-25 | 刁久新 | Starting protective switch |
| CN102739145A (en) * | 2011-04-06 | 2012-10-17 | 张家港新特变科技有限公司 | Starting method of magnetic voltage regulator |
| CN203896575U (en) * | 2014-05-23 | 2014-10-22 | 成都东旭节能科技有限公司 | Adjustable circuit suitable for dimmable electrodeless lamp ballast |
| CN104540265A (en) * | 2014-11-21 | 2015-04-22 | 南京大学 | Low-cost omnidirectional fully-compatible driving device |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170818 |