CN204291483U - A kind of LED is without strobe apparatus - Google Patents
A kind of LED is without strobe apparatus Download PDFInfo
- Publication number
- CN204291483U CN204291483U CN201420744887.0U CN201420744887U CN204291483U CN 204291483 U CN204291483 U CN 204291483U CN 201420744887 U CN201420744887 U CN 201420744887U CN 204291483 U CN204291483 U CN 204291483U
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- Prior art keywords
- circuit
- triode
- filter
- filter circuit
- led
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Abstract
The utility model provides a kind of LED without strobe apparatus, comprising: input filter circuit, RC filter circuit, amplifying circuit and output circuit; Described input filter circuit is filter capacitor C1, described RC filtered electrical routing resistance R1 and electric capacity C2 forms, described amplifying circuit comprises the multiple tube, inductance L and the electric capacity C3 that are made up of triode Q1 and triode Q2, described output circuit comprises filter capacitor C4 and LED group, the output of described RC filter circuit connects the base stage of multiple tube, and the electrode input end of described input filter circuit connects the collector electrode of multiple tube.The utility model is by arranging RC filter circuit and inductance is equivalent to add bulky capacitor and large inductance in circuit in the base stage of multiple tube, in circuit, ripple then obtains larger suppression, reduces strobe effect.
Description
Technical field
The utility model relates to a kind of distribution box, is specifically related to a kind of LED without strobe apparatus.
Background technology
Existing LED product needs higher power factor, in order to improve the power factor of product, current product is all after rectifying and wave-filtering, all have employed less filter capacitor carry out filtering to the electric current after rectification, because filter capacitor is less, therefore still have the Envelop waves of 120Hz at rear class electric current output, when LED is lighted, observed by camera, still can find that there is the interference stripe of fast moving eventually, still there is certain injury to the eyes of people in this interference.At present in order to head it off, having to adopt increases rear class filter capacitor, has and adopts the scheme increasing one-level DC-DC conversion circuit to improve.
But due to the restriction of product cost and the restriction of size, can not accomplish enough large to electrochemical capacitor capacity, the scheme therefore increasing rear class electrochemical capacitor can not be used for whole products.
Utility model content
In order to overcome above-mentioned prior art Problems existing, the utility model provides a kind of LED without strobe apparatus, by increasing the filter capacitor capacity of output, to reduce the ripple of output.
The technical solution of the utility model is: a kind of LED, without strobe apparatus, comprising: input filter circuit, RC filter circuit, amplifying circuit and output circuit; Described input filter circuit is filter capacitor C1, described RC filtered electrical routing resistance R1 and electric capacity C2 forms, described amplifying circuit comprises the multiple tube, inductance L and the electric capacity C3 that are made up of triode Q1 and triode Q2, described output circuit comprises filter capacitor C4 and LED group, the base stage of the output connecting triode Q1 of described RC filter circuit, the collector electrode of the output connecting triode Q1 of described filter capacitor C1.
Further, the base stage of connecting triode Q2 after the emitter series inductance L of described triode Q1, the base stage of described triode Q2 is by electric capacity C3 ground connection, and the emitter of described triode Q2 connects output circuit.
The beneficial effects of the utility model are: by arranging RC filter circuit in the base stage of multiple tube, the filter effect exported from the emitter of triode Q2 is the electric capacity C2 after triode Q1 amplifies, be equivalent to add bulky capacitor in circuit, and be connected on inductance L and the C3 of Q2 base stage, amplified by Q2 again, be equivalent to like this add a large inductance in circuit, and the electrochemical capacitor that two large, therefore in circuit, ripple then obtains larger suppression, reduces strobe effect.
Accompanying drawing explanation
Fig. 1 is that a kind of LED that the utility model proposes is without strobe apparatus circuit structure diagram
Fig. 2 is RC filter circuit and multiple tube equivalent circuit diagram in Fig. 1;
Fig. 3 is the further equivalent circuit diagram of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
Be that a kind of LED that the utility model proposes is without strobe apparatus structure chart see Fig. 1.
As shown in Figure 1, a kind of LED, without strobe apparatus, comprising: input filter circuit, RC filter circuit, amplifying circuit and output circuit; Described input filter circuit is filter capacitor C1, described RC filtered electrical routing resistance R1 and electric capacity C2 forms, described amplifying circuit comprises the multiple tube, inductance L and the electric capacity C3 that are made up of triode Q1 and triode Q2, described output circuit comprises filter capacitor C4 and LED group, the base stage of the output connecting triode Q1 of described RC filter circuit, the collector electrode of the output connecting triode Q1 of described filter capacitor C1.
Further, the base stage of connecting triode Q2 after the emitter series inductance L of described triode Q1, the base stage of described triode Q2 is by electric capacity C3 ground connection, and the emitter of described triode Q2 connects output circuit.
In the utility model embodiment, by arranging RC filter circuit in the base stage of multiple tube, the filter effect exported from the emitter of triode Q2 is the electric capacity C2 after triode Q1 amplifies, be equivalent to add bulky capacitor in circuit, and be connected on inductance L and the electric capacity C3 of triode Q2 base stage, amplified by triode Q2 again, be equivalent to like this add a large inductance in circuit, with two large electrochemical capacitors, therefore in circuit, ripple then obtains larger suppression, reduces strobe effect.
Physical circuit is as follows: set the amplification coefficient of triode Q1 as β 1, the amplification coefficient of triode Q2 is β 2, then the amplification coefficient of multiple tube is β=β 1 β 2, therefore the filter effect exported from the emitter of triode Q2 is the β 1 times of electric capacity C2, be equivalent to add bulky capacitor in circuit, and be connected on inductance and the C3 of triode Q2 base stage, β 2 speed is amplified again by triode Q2, be equivalent to like this add a large inductance in circuit, with two large electrochemical capacitors, therefore in circuit, ripple then obtains larger suppression.
In foregoing circuit, resistance R1 and electric capacity C2 forms RC filter network, and triode Q1 and triode Q2 forms Darlington transistor, its equivalent electric circuit, as shown in Figures 2 and 3.
See Fig. 2, Uec=Ib*R1+Ueb=Ib*R1, because Iec=β * is Ib, so there is Uec=(Iec/ β) * R1.Fig. 3 is further equivalent electric circuit, wherein Uec=Rec*Iec, so there is Rec*Iec=(Iec/ β) * R1 to obtain Rec=R1/ β.The RC filter circuit that the utility model provides, its filtering performance is: the product of R and C, that is: R1*C2=Rec*C2'=(R1/ β) * C2', so C2'=C2* β, so, be equivalent to β times that is amplified by the capacity of C2, if C2 capacity selects 10uF, triode multiplication factor is 100 times, then the capacity of final equivalent capacity C2' is equivalent to 1000uF.
Above the utility model is described in detail, but the utility model is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from the utility model aim.Do not depart from design of the present utility model and scope can make many other and change and remodeling.Should be appreciated that the utility model is not limited to specific execution mode, scope of the present utility model is defined by the following claims.
Claims (2)
1. LED is without a strobe apparatus, it is characterized in that, comprising: input filter circuit, RC filter circuit, amplifying circuit and output circuit; Described input filter circuit is filter capacitor C1, described RC filtered electrical routing resistance R1 and electric capacity C2 forms, described amplifying circuit comprises the multiple tube, inductance L and the electric capacity C3 that are made up of triode Q1 and triode Q2, described output circuit comprises filter capacitor C4 and LED group, the base stage of the output connecting triode Q1 of described RC filter circuit, the collector electrode of the output connecting triode Q1 of described filter capacitor C1.
2. a kind of LED according to claim 1 is without strobe apparatus, it is characterized in that, the base stage of connecting triode Q2 after the emitter series inductance L of described triode Q1, the base stage of described triode Q2 is by electric capacity C3 ground connection, and the emitter of described triode Q2 connects output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420744887.0U CN204291483U (en) | 2014-12-01 | 2014-12-01 | A kind of LED is without strobe apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420744887.0U CN204291483U (en) | 2014-12-01 | 2014-12-01 | A kind of LED is without strobe apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204291483U true CN204291483U (en) | 2015-04-22 |
Family
ID=52874607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420744887.0U Expired - Fee Related CN204291483U (en) | 2014-12-01 | 2014-12-01 | A kind of LED is without strobe apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204291483U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105188221A (en) * | 2015-09-15 | 2015-12-23 | 欧普照明股份有限公司 | LED drive circuit |
| CN106292779A (en) * | 2016-10-12 | 2017-01-04 | 四川森迪科技发展股份有限公司 | A kind of current adjustment driving temperature control system of couveuse ripple suppression |
| WO2021248266A1 (en) * | 2020-06-08 | 2021-12-16 | Tridonic Gmbh & Co Kg | Ripple suppression circuit, controlling method and driving equipment |
-
2014
- 2014-12-01 CN CN201420744887.0U patent/CN204291483U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105188221A (en) * | 2015-09-15 | 2015-12-23 | 欧普照明股份有限公司 | LED drive circuit |
| CN106292779A (en) * | 2016-10-12 | 2017-01-04 | 四川森迪科技发展股份有限公司 | A kind of current adjustment driving temperature control system of couveuse ripple suppression |
| WO2021248266A1 (en) * | 2020-06-08 | 2021-12-16 | Tridonic Gmbh & Co Kg | Ripple suppression circuit, controlling method and driving equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151201 |
|
| EXPY | Termination of patent right or utility model |