CN204362403U - A kind of lighting lamp circuit - Google Patents
A kind of lighting lamp circuit Download PDFInfo
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- CN204362403U CN204362403U CN201520093033.5U CN201520093033U CN204362403U CN 204362403 U CN204362403 U CN 204362403U CN 201520093033 U CN201520093033 U CN 201520093033U CN 204362403 U CN204362403 U CN 204362403U
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Abstract
This application discloses a kind of lighting lamp circuit, comprise: DC power supply V1, first capacitor C1, pull-up resistor R1, current-limiting resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, pull down resistor R6, 7th resistance R7, first switching tube Q1, second switch pipe Q2, 3rd switching tube Q3, touch key-press K1 and lighting load, can find out, the application adopts discrete component to realize constant current and drives lighting load, make lighting load when mains voltage variations, brightness remains unchanged, although each discrete component is in power supply state always, but it is only just in running order when lighting load works, other period does not work, so the quiescent current of whole circuit is lower, power consumption is little.
Description
Technical field
The utility model relates to lighting technical field, in particular, relates to a kind of lighting lamp circuit.
Background technology
Due to LED (Light Emitting Diode, light-emitting diode) lamp has relative to common bulb the advantage that the life-span is long, low in energy consumption and efficiency is high, therefore, existing illuminating lamp (as car steering room lighting lamp) is changed to LED by common bulb gradually.
Traditional LED switch adopts ship type switch or push-button switch, because the handling and sense of touch of ship type switch or push-button switch is not good, therefore, is replaced gradually by handling and the good touch key-press of sense of touch.
Current touch key-press adopts single-chip microcomputer, digital integrated circuit or special chip to realize to the control of LED, and single-chip microcomputer or special chip realize the control to LED by real-time detection touch key-press state (close or disconnect).So, just need single-chip microcomputer, digital integrated circuit or special chip to be in power supply and operating state always, thus cause that the quiescent current of whole control system is high, power consumption is large.
Utility model content
In view of this, the utility model provides a kind of lighting lamp circuit, to realize the reduction of quiescent current, reduces power consumption.
A kind of lighting lamp circuit, comprising: DC power supply V1, the first capacitor C1, pull-up resistor R1, current-limiting resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, pull down resistor R6, the 7th resistance R7, the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, touch key-press K1 and lighting load;
The control end of described first switching tube Q1 is connected with described DC power supply V1 by the described current-limiting resistance R2 be sequentially connected in series, described pull-up resistor R1, the input of described first switching tube Q1 is connected with described DC power supply V1 by described 3rd resistance R3, the output of described first switching tube Q1 connects earth terminal by described lighting load, and the negative pole of described DC power supply V1 connects earth terminal;
The input of described 3rd switching tube Q3 connects one end of described 3rd resistance R3, the control end of described 3rd switching tube Q3 connects the common port of described 3rd resistance R3 and described first switching tube Q1 input, the output of described 3rd switching tube Q3 connects the control end of described first switching tube Q1 and the common port of described current-limiting resistance R2, and described first switching tube Q1 and described 3rd switching tube Q3 formation constant-current source circuit provide stable electric current for described lighting load;
The input of described second switch pipe Q2 connects the common port of described pull-up resistor R1 and described current-limiting resistance R2, and the output of described second switch pipe Q2 connects earth terminal, and the control end of described second switch pipe Q2 connects earth terminal by described pull down resistor R6;
R4 one end of described 4th resistance connects the input of described second switch pipe Q2, the other end of described 4th resistance R4 by being sequentially connected in series described touch key-press K1, described 7th resistance R7 is connected earth terminal with described lighting load;
One end of described 5th resistance R5 connects the common port of described touch key-press K1 and described 7th resistance R7, and the other end of described 5th resistance R5 connects the control end of described second switch pipe Q2;
The positive plate of described first capacitor C1 connects the positive pole of described DC power supply V1, and negative plate connects the common port of described touch key-press K1 and described 4th resistance R4.
Preferably, also comprise: the second capacitor C2 of interference signal on touch key-press K1 described in filtering;
The positive plate of described second capacitor C2 connects the control end of described second switch pipe Q2, and negative plate connects earth terminal.
Preferably, described first switching tube Q1 and described 3rd switching tube Q3 is PNP type triode.
Preferably, described first switching tube Q1 and described 3rd switching tube Q3 is PMOS.
Preferably, described second switch pipe Q2 is NPN type triode.
Preferably, described second switch pipe Q2 is NMOS tube.
As can be seen from above-mentioned technical scheme, the utility model provides a kind of lighting lamp circuit, comprise: DC power supply V1, first capacitor C1, pull-up resistor R1, current-limiting resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, pull down resistor R6, 7th resistance R7, first switching tube Q1, second switch pipe Q2, 3rd switching tube Q3, touch key-press K1 and lighting load, can find out, the application adopts discrete component to realize constant current and drives lighting load, make lighting load when mains voltage variations, brightness remains unchanged, although each discrete component is in power supply state always, but it is only just in running order when lighting load works, other period does not work, so the quiescent current of whole circuit is lower, power consumption is little.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The circuit diagram of Fig. 1 a kind of lighting lamp circuit disclosed in the utility model embodiment;
The circuit diagram of Fig. 2 another kind of lighting lamp circuit disclosed in the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment discloses a kind of lighting lamp circuit, to realize the reduction of quiescent current, reduces power consumption.
See Fig. 1, a kind of circuit diagram of lighting lamp circuit disclosed in the utility model embodiment, lighting lamp circuit comprises: DC power supply V1, the first capacitor C1, pull-up resistor R1, current-limiting resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, pull down resistor R6, the 7th resistance R7, the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, touch key-press K1 and lighting load;
Wherein,
The control end of the first switching tube Q1 is connected with DC power supply V1 by current-limiting resistance R2, the pull-up resistor R1 be sequentially connected in series, the input of the first switching tube Q1 is connected with DC power supply V1 by the 3rd resistance R3, the output of the first switching tube Q1 connects earth terminal by lighting load, and the negative pole of DC power supply V1 connects earth terminal;
The input of the 3rd switching tube Q3 connects one end of the 3rd resistance R3, the control end of the 3rd switching tube Q3 connects the common port of the 3rd resistance R3 and the first switching tube Q1 input, the output of the 3rd switching tube Q3 connects the control end of the first switching tube Q1 and the common port of current-limiting resistance R2, and the first switching tube Q1 and the 3rd switching tube Q3 form constant-current source circuit for lighting load provides stable electric current;
The input of second switch pipe Q2 connects the common port of pull-up resistor R1 and current-limiting resistance R2, and the output of second switch pipe Q2 connects earth terminal, and the control end of second switch pipe Q2 connects earth terminal by pull down resistor R6;
One end of 4th resistance R4 connects the input of second switch pipe Q2, and the other end of the 4th resistance R4 is connected earth terminal by touch key-press K1, the 7th resistance R7 be sequentially connected in series with lighting load;
One end of 5th resistance R5 connects the common port of touch key-press K1 and the 7th resistance R7, and the other end of the 5th resistance R5 connects the control end of second switch pipe Q2;
One end of first capacitor C1 connects the positive pole of DC power supply V1, and negative plate connects the common port of touch key-press K1 and the 4th resistance R4.
In the lighting lamp circuit that the application provides, the first switching tube Q1 and the 3rd switching tube Q3 forms constant-current source circuit, controls the electric current by lighting load, makes lighting load constant current operation.First switching tube Q1 and second switch pipe Q2 two switching tubes form main control circuit.
The operation principle of constant-current source circuit is specific as follows:
When the first switching tube Q1 opens, electric current flows through the 3rd resistance R3, the input of the 3rd switching tube Q3 and control end are connected in parallel on the two ends of the 3rd resistance R3, conducting voltage due to the 3rd switching tube Q3 is a definite value U, so when the first switching tube Q1 opens, the voltage at the 3rd resistance R3 two ends remains at definite value U, and the electric current flowing through the 3rd resistance R3 is always U/R3, thus forms constant-current source electric current.
Wherein, the effect of the 3rd switching tube Q3 is the control end electric current of adjustment first switching tube Q1, and the input making to flow through the first switching tube Q1 is always U/R3 to the electric current of output.
It should be noted that, the first switching tube Q1 is the switching tube controlling lighting load switch, is again the part of constant-current source circuit, thus has saved cost.
The operation principle of lighting lamp circuit is specific as follows:
Time initial, the control end of second switch pipe Q2 draws as low level by pull down resistor R6, and second switch pipe Q2 is in closed condition; The control end of the first switching tube Q1 draws as high level by pull-up resistor R1, and the first switching tube Q1 is in closed condition, and lighting load is closed condition.Now, because touch key-press K1 is off state, the first switching tube Q1 and second switch pipe Q2 is in closed condition, and therefore, in Fig. 1, A point is high level over the ground, and A point voltage equals supply voltage.
After touch key-press K1 is closed, because A point voltage is supply voltage, therefore B point voltage is also supply voltage, at this moment makes the control end of second switch pipe Q2 become high level from low level by the 5th resistance R5, and second switch pipe Q2 opens.After second switch pipe Q2 opens, the control end of the first switching tube Q1 is drawn as low level by current-limiting resistance R2 by second switch pipe Q2, and the first switching tube Q1 opens, and exports high level, and lighting load is lighted.The high level that first switching tube Q1 exports is connected to B point by the 7th resistance R7, the control end of second switch pipe Q2 is made to become high level by the 5th resistance R5 again, thus realize the self-locking of whole lighting lamp circuit, now, even if disconnect touch key-press K1, whole circuit still keeps lighting load to be in opening, thus completes the process of turning on light.
After touch key-press K1 is closed, second switch pipe Q2 opens, and the input terminal voltage of second switch pipe Q2 becomes low level, A point voltage is due to the existence of the first capacitor C1, can not reduce rapidly, but can a period of time be kept, thus make whole circuit complete stable self-locking.
After lighting lamp circuit lights lighting load, disconnect touch key-press K1, at this moment the input of second switch pipe Q2 is low level, and the first capacitor C1 and the 4th resistance R4 forms charging circuit, charges to the first capacitor C1.When after the first capacitor C1 charging complete, the level of A point reduces to low level.At this moment, the level of closed touch key-press K1, B point becomes low level again, and the control end of second switch pipe Q2 becomes low level, and second switch pipe Q2 closes, and the first switching tube Q1 also closes thereupon, the first switching tube Q1 output low level, and lighting load is closed.At this moment, the low level that first switching tube Q1 exports is connected to B point by the 7th resistance R7, the control end of second switch pipe Q2 is made to become low level by the 5th resistance R5 again, whole circuit is closed, now, even if disconnect touch key-press K1, whole circuit still keeps lighting load to be in closed condition, thus completes the process of turning off the light.
After touch key-press K1 is closed, second switch pipe Q2 closes, and the input terminal voltage of second switch pipe Q2 becomes high level, A point voltage is due to the existence of the first capacitor C1, can not raise rapidly, but can a period of time be kept, thus make whole circuit complete stable closedown.
In summary it can be seen, the lighting lamp circuit that the utility model provides adopts discrete component to realize constant current and drives lighting load, make lighting load when mains voltage variations, brightness remains unchanged, although each discrete component is in power supply state always, only just in running order when lighting load works, other period does not work, so the quiescent current of whole circuit is lower, power consumption is little.
Secondly, by adopting constant-current source circuit to make lighting load luminescence constant, the useful life of lighting load can be extended.
Again, the application use only a touch key-press K1, and sometimes need employing two touch key-presss compared to existing technology, the application also reduces cost to a certain extent.
Finally, the discrete component that the application adopts adopts for single-chip microcomputer, digital integrated circuit or special chip relative to prior art, has advantage with low cost, to be easy to realization and energy savings.
It should be noted that, when whole circuit is in closed condition, first switching tube Q1, second switch pipe Q2 and the 3rd switching tube Q3 are all in closed condition, now, the first switching tube Q1 and second switch pipe Q2 leakage current is only had to exist and almost nil, therefore, the quiescent current of whole circuit is extremely low, almost nil.
Preferably, the lighting load in the application is LED (specifically see Fig. 1).
For optimizing above-described embodiment further, see Fig. 2, a kind of circuit diagram of lighting lamp circuit disclosed in another embodiment of the utility model, on basis embodiment illustrated in fig. 1, also comprises: the second capacitor C2;
The positive plate of the second capacitor C2 connects the control end of second switch pipe Q2, and negative plate connects earth terminal, the interference signal of the second capacitor C2 for filtering touch key-press K1 on, thus stablizing that whole circuit is become.
It should be noted that, the first capacitor C1 also has the effect of interference signal on filtering touch key-press K1.
Preferably, in the various embodiments described above, the first switching tube Q1 and the 3rd switching tube Q3 can be PNP type triode, or is PMOS.
Second switch pipe Q2 can be NPN type triode, or is NMOS tube.
First switching tube Q1, second switch pipe Q2 and choosing of the 3rd switching tube Q3 are specifically determined according to actual needs, and the utility model does not limit at this.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a lighting lamp circuit, it is characterized in that, comprising: DC power supply V1, the first capacitor C1, pull-up resistor R1, current-limiting resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, pull down resistor R6, the 7th resistance R7, the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, touch key-press K1 and lighting load;
The control end of described first switching tube Q1 is connected with described DC power supply V1 by the described current-limiting resistance R2 be sequentially connected in series, described pull-up resistor R1, the input of described first switching tube Q1 is connected with described DC power supply V1 by described 3rd resistance R3, the output of described first switching tube Q1 connects earth terminal by described lighting load, and the negative pole of described DC power supply V1 connects earth terminal;
The input of described 3rd switching tube Q3 connects one end of described 3rd resistance R3, the control end of described 3rd switching tube Q3 connects the common port of described 3rd resistance R3 and described first switching tube Q1 input, the output of described 3rd switching tube Q3 connects the control end of described first switching tube Q1 and the common port of described current-limiting resistance R2, and described first switching tube Q1 and described 3rd switching tube Q3 formation constant-current source circuit provide stable electric current for described lighting load;
The input of described second switch pipe Q2 connects the common port of described pull-up resistor R1 and described current-limiting resistance R2, and the output of described second switch pipe Q2 connects earth terminal, and the control end of described second switch pipe Q2 connects earth terminal by described pull down resistor R6;
R4 one end of described 4th resistance connects the input of described second switch pipe Q2, the other end of described 4th resistance R4 by being sequentially connected in series described touch key-press K1, described 7th resistance R7 is connected earth terminal with described lighting load;
One end of described 5th resistance R5 connects the common port of described touch key-press K1 and described 7th resistance R7, and the other end of described 5th resistance R5 connects the control end of described second switch pipe Q2;
The positive plate of described first capacitor C1 connects the positive pole of described DC power supply V1, and negative plate connects the common port of described touch key-press K1 and described 4th resistance R4.
2. lighting lamp circuit according to claim 1, is characterized in that, also comprises: the second capacitor C2 of interference signal on touch key-press K1 described in filtering;
The positive plate of described second capacitor C2 connects the control end of described second switch pipe Q2, and negative plate connects earth terminal.
3. lighting lamp circuit according to claim 1, is characterized in that, described first switching tube Q1 and described 3rd switching tube Q3 is PNP type triode.
4. lighting lamp circuit according to claim 1, is characterized in that, described first switching tube Q1 and described 3rd switching tube Q3 is PMOS.
5. lighting lamp circuit according to claim 1, is characterized in that, described second switch pipe Q2 is NPN type triode.
6. lighting lamp circuit according to claim 1, is characterized in that, described second switch pipe Q2 is NMOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520093033.5U CN204362403U (en) | 2015-02-10 | 2015-02-10 | A kind of lighting lamp circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520093033.5U CN204362403U (en) | 2015-02-10 | 2015-02-10 | A kind of lighting lamp circuit |
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| CN204362403U true CN204362403U (en) | 2015-05-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377598A (en) * | 2018-04-27 | 2018-08-07 | 北京新能源汽车股份有限公司 | LED lamp and LED drive circuit |
| CN109302052A (en) * | 2018-11-12 | 2019-02-01 | 广东乐心医疗电子股份有限公司 | High-voltage starting circuit and switching power supply |
-
2015
- 2015-02-10 CN CN201520093033.5U patent/CN204362403U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377598A (en) * | 2018-04-27 | 2018-08-07 | 北京新能源汽车股份有限公司 | LED lamp and LED drive circuit |
| CN109302052A (en) * | 2018-11-12 | 2019-02-01 | 广东乐心医疗电子股份有限公司 | High-voltage starting circuit and switching power supply |
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hengrun Technology Co., Ltd Address before: 8 / F, block B, No. 11, Anxiang Beili, Chaoyang District, Beijing 100101 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |