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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- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005286 illumination Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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 the field of lighting technology, more specifically the utility model relates to an illuminating lamp circuit that says so.
Background
Because a Light Emitting Diode (LED) lamp has advantages of long life, low power consumption and high efficiency compared to a general bulb, an existing illumination lamp (e.g., an automotive cabin interior illumination lamp) is gradually changed from a general bulb to an LED lamp.
The traditional LED lamp switch adopts a boat-shaped switch or a button switch, and the boat-shaped switch or the button switch is poor in controllability and touch sense, so that the boat-shaped switch or the button switch is gradually replaced by a touch key with good control performance and touch sense.
At present, the LED lamp is controlled by a touch key through a single chip microcomputer, a digital integrated circuit or a special chip, and the single chip microcomputer or the special chip controls the LED lamp through detecting the state (on or off) of the touch key in real time. Therefore, a single chip microcomputer, a digital integrated circuit or a special chip is required to be in a power supply and working state all the time, so that the whole control system is high in quiescent current and large in power consumption.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an illumination lamp circuit to realize quiescent current's reduction, reduce the consumption.
A light circuit, comprising: the LED lamp comprises a direct-current power supply V1, a first capacitor C1, a pull-up resistor R1, a current-limiting resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a pull-down resistor R6, a seventh resistor R7, a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a touch key K1 and a lighting load;
the control end of the first switching tube Q1 is connected to the dc power supply V1 through the current limiting resistor R2 and the pull-up resistor R1 which are connected in series in sequence, the input end of the first switching tube Q1 is connected to the dc power supply V1 through the third resistor R3, the output end of the first switching tube Q1 is connected to the ground end through the lighting load, and the negative electrode of the dc power supply V1 is connected to the ground end;
an input end of the third switching tube Q3 is connected to one end of the third resistor R3, a control end of the third switching tube Q3 is connected to a common end of the third resistor R3 and an input end of the first switching tube Q1, an output end of the third switching tube Q3 is connected to a common end of the control end of the first switching tube Q1 and the current limiting resistor R2, and the first switching tube Q1 and the third switching tube Q3 form a constant current source circuit to provide stable current for the lighting load;
an input end of the second switch tube Q2 is connected to a common end of the pull-up resistor R1 and the current-limiting resistor R2, an output end of the second switch tube Q2 is connected to a ground end, and a control end of the second switch tube Q2 is connected to the ground end through the pull-down resistor R6;
one end of the R4 of the fourth resistor is connected to the input end of the second switch tube Q2, and the other end of the fourth resistor R4 is connected to the ground end by serially connecting the touch key K1, the seventh resistor R7 and the lighting load in sequence;
one end of the fifth resistor R5 is connected with the common end of the touch key K1 and the seventh resistor R7, and the other end of the fifth resistor R5 is connected with the control end of the second switch tube Q2;
the positive plate of the first capacitor C1 is connected to the positive electrode of the dc power source V1, and the negative plate is connected to the common terminal of the touch key K1 and the fourth resistor R4.
Preferably, the method further comprises the following steps: a second capacitor C2 for filtering interference signals on the touch key K1;
the positive electrode plate of the second capacitor C2 is connected to the control terminal of the second switching tube Q2, and the negative electrode plate is connected to the ground terminal.
Preferably, the first switching tube Q1 and the third switching tube Q3 are both PNP-type triodes.
Preferably, the first switching tube Q1 and the third switching tube Q3 are both PMOS tubes.
Preferably, the second switching tube Q2 is an NPN-type transistor.
Preferably, the second switching tube Q2 is an NMOS tube.
According to the above technical scheme, the utility model provides an illuminating lamp circuit, include: the direct-current power supply V1, the first capacitor C1, the pull-up resistor R1, the current-limiting resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the pull-down resistor R6, the seventh resistor R7, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the touch key K1 and the lighting load.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a circuit diagram of an illumination lamp circuit disclosed in an embodiment of the present invention;
fig. 2 is a circuit diagram of another lighting lamp circuit disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses light circuit to realize quiescent current's reduction, reduce the consumption.
Referring to fig. 1, the embodiment of the present invention discloses a circuit diagram of a lighting lamp circuit, the lighting lamp circuit includes: the LED lamp comprises a direct-current power supply V1, a first capacitor C1, a pull-up resistor R1, a current-limiting resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a pull-down resistor R6, a seventh resistor R7, a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a touch key K1 and a lighting load;
wherein,
the control end of the first switching tube Q1 is connected with a direct-current power supply V1 through a current-limiting resistor R2 and a pull-up resistor R1 which are sequentially connected in series, the input end of the first switching tube Q1 is connected with a direct-current power supply V1 through a third resistor R3, the output end of the first switching tube Q1 is connected with the ground end through a lighting load, and the negative electrode of the direct-current power supply V1 is connected with the ground end;
the input end of a third switching tube Q3 is connected with one end of a third resistor R3, the control end of a third switching tube Q3 is connected with the common end of the third resistor R3 and the input end of a first switching tube Q1, the output end of a third switching tube Q3 is connected with the control end of a first switching tube Q1 and the common end of a current-limiting resistor R2, and the first switching tube Q1 and the third switching tube Q3 form a constant current source circuit to provide stable current for the lighting load;
the input end of the second switch tube Q2 is connected with the common end of the pull-up resistor R1 and the current-limiting resistor R2, the output end of the second switch tube Q2 is connected with the ground end, and the control end of the second switch tube Q2 is connected with the ground end through the pull-down resistor R6;
one end of a fourth resistor R4 is connected with the input end of the second switch tube Q2, and the other end of the fourth resistor R4 is connected with the ground end through a touch key K1, a seventh resistor R7 and an illumination load which are sequentially connected in series;
one end of the fifth resistor R5 is connected with the common end of the touch key K1 and the seventh resistor R7, and the other end of the fifth resistor R5 is connected with the control end of the second switch tube Q2;
one end of the first capacitor C1 is connected to the positive electrode of the dc power supply V1, and the negative electrode plate is connected to the common terminal of the touch key K1 and the fourth resistor R4.
In the lighting lamp circuit provided by the application, the first switching tube Q1 and the third switching tube Q3 form a constant current source circuit, and the constant current source circuit controls the current passing through the lighting load to enable the lighting load to work in a constant current mode. The two switching tubes of the first switching tube Q1 and the second switching tube Q2 form a main control circuit.
The working principle of the constant current source circuit is as follows:
when the first switch tube Q1 is turned on, current flows through the third resistor R3, the input end and the control end of the third switch tube Q3 are connected in parallel to the two ends of the third resistor R3, and since the on-state voltage of the third switch tube Q3 is a fixed value U, when the first switch tube Q1 is turned on, the voltage across the third resistor R3 is always kept at the fixed value U, and the current flowing through the third resistor R3 is always U/R3, thereby forming a constant current source.
The third switch tube Q3 is used for adjusting the current of the control end of the first switch tube Q1, so that the current flowing from the input end to the output end of the first switch tube Q1 is always U/R3.
It should be noted that the first switching tube Q1 is not only a switching tube for controlling the lighting load switch, but also a component of the constant current source circuit, thereby saving the cost.
The working principle of the lighting lamp circuit is as follows:
initially, the control terminal of the second switch Q2 is pulled to a low level by the pull-down resistor R6, and the second switch Q2 is in an off state; the control terminal of the first switch transistor Q1 is pulled high by the pull-up resistor R1, the first switch transistor Q1 is in an off state, and the lighting load is in an off state. At this time, since the touch key K1 is in the off state, the first switch tube Q1 and the second switch tube Q2 are in the off state, and therefore, the point a in fig. 1 is at a high level with the voltage at the point a equal to the power voltage.
When the touch key K1 is turned on, the voltage at point a is the power supply voltage, and therefore the voltage at point B is also the power supply voltage, and at this time, the control terminal of the second switch transistor Q2 is changed from low level to high level by the fifth resistor R5, and the second switch transistor Q2 is turned on. After the second switch Q2 is turned on, the control terminal of the first switch Q1 is pulled to low level by the second switch Q2 through the current limiting resistor R2, the first switch Q1 is turned on, and outputs high level, so that the lighting load is turned on. The high level of first switch tube Q1 output passes through seventh resistance R7 and is connected to B point, and rethread fifth resistance R5 makes the control end of second switch tube Q2 become the high level to realize the auto-lock of whole light circuit, at this moment, even break touch button K1, whole circuit still keeps lighting load in the on-state, thereby accomplishes the process of switching on the light.
After the touch key K1 is closed, the second switch tube Q2 is turned on, the voltage at the input end of the second switch tube Q2 becomes low level, and the voltage at the point a does not decrease rapidly due to the existence of the first capacitor C1, but keeps for a period of time, so that the whole circuit completes stable self-locking.
When the lighting lamp circuit lights the lighting load, the touch key K1 is turned off, and the input end of the second switch tube Q2 is at a low level, the first capacitor C1 and the fourth resistor R4 form a charging circuit to charge the first capacitor C1. When the charging of the first capacitor C1 is completed, the level at the point a is lowered to the low level. At this time, the touch key K1 is closed again, the level of the point B becomes low, the control terminal of the second switch Q2 becomes low, the second switch Q2 is closed, the first switch Q1 is also closed, the first switch Q1 outputs low, and the lighting load is turned off. At this time, the low level output by the first switch tube Q1 is connected to point B through the seventh resistor R7, and the control terminal of the second switch tube Q2 is changed to low level through the fifth resistor R5, so that the whole circuit is turned off, and at this time, even if the touch key K1 is turned off, the whole circuit still keeps the lighting load in the off state, thereby completing the light-off process.
After the touch key K1 is closed, the second switch tube Q2 is turned off, the voltage at the input end of the second switch tube Q2 becomes high level, and the voltage at the point a does not rise rapidly due to the existence of the first capacitor C1, but remains for a while, so that the whole circuit is turned off stably.
In conclusion, the utility model provides an it can be seen that the light circuit adopts discrete component to realize constant current drive lighting load, makes lighting load when mains voltage changes, and luminance keeps unchangeable, and each discrete component is in power supply state always, but only just is in operating condition when lighting load work, and other periods do not work, so whole circuit's quiescent current is lower, and the consumption is little.
And secondly, the constant current source circuit is adopted to enable the lighting load to emit light constantly, so that the service life of the lighting load can be prolonged.
Thirdly, only one touch key K1 is adopted, and compared with the prior art that two touch keys are sometimes needed, the cost is reduced to a certain extent.
Finally, compared with the prior art that a single chip microcomputer, a digital integrated circuit or a special chip is adopted, the discrete component adopted by the method has the advantages of low cost, easiness in implementation and energy conservation.
It should be noted that, when the whole circuit is in the off state, the first switching tube Q1, the second switching tube Q2 and the third switching tube Q3 are all in the off state, and at this time, only the leakage current of the first switching tube Q1 and the second switching tube Q2 exists and is almost zero, so the quiescent current of the whole circuit is extremely low and is almost zero.
Preferably, the lighting load in the present application is an LED lamp (see fig. 1 in particular).
In order to further optimize the above embodiment, referring to fig. 2, a circuit diagram of a lighting lamp circuit according to another embodiment of the present invention is further included on the basis of the embodiment shown in fig. 1: a second capacitor C2;
the positive plate of the second capacitor C2 is connected to the control terminal of the second switch Q2, the negative plate is connected to the ground terminal, and the second capacitor C2 is used for filtering the interference signal on the touch key K1, so that the whole circuit becomes stable.
It should be noted that the first capacitor C1 also has the function of filtering the interference signal on the touch key K1.
In the above embodiments, the first switch Q1 and the third switch Q3 may be both PNP transistors or both PMOS transistors.
The second switch Q2 may be an NPN transistor or an NMOS transistor.
The selection of the first switch tube Q1, the second switch tube Q2 and the third switch tube Q3 is specifically determined according to actual needs, and the present invention is not limited herein.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A light circuit, comprising: the LED lamp comprises a direct-current power supply V1, a first capacitor C1, a pull-up resistor R1, a current-limiting resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a pull-down resistor R6, a seventh resistor R7, a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a touch key K1 and a lighting load;
the control end of the first switching tube Q1 is connected to the dc power supply V1 through the current limiting resistor R2 and the pull-up resistor R1 which are connected in series in sequence, the input end of the first switching tube Q1 is connected to the dc power supply V1 through the third resistor R3, the output end of the first switching tube Q1 is connected to the ground end through the lighting load, and the negative electrode of the dc power supply V1 is connected to the ground end;
an input end of the third switching tube Q3 is connected to one end of the third resistor R3, a control end of the third switching tube Q3 is connected to a common end of the third resistor R3 and an input end of the first switching tube Q1, an output end of the third switching tube Q3 is connected to a common end of the control end of the first switching tube Q1 and the current limiting resistor R2, and the first switching tube Q1 and the third switching tube Q3 form a constant current source circuit to provide stable current for the lighting load;
an input end of the second switch tube Q2 is connected to a common end of the pull-up resistor R1 and the current-limiting resistor R2, an output end of the second switch tube Q2 is connected to a ground end, and a control end of the second switch tube Q2 is connected to the ground end through the pull-down resistor R6;
one end of the R4 of the fourth resistor is connected to the input end of the second switch tube Q2, and the other end of the fourth resistor R4 is connected to the ground end by serially connecting the touch key K1, the seventh resistor R7 and the lighting load in sequence;
one end of the fifth resistor R5 is connected with the common end of the touch key K1 and the seventh resistor R7, and the other end of the fifth resistor R5 is connected with the control end of the second switch tube Q2;
the positive plate of the first capacitor C1 is connected to the positive electrode of the dc power source V1, and the negative plate is connected to the common terminal of the touch key K1 and the fourth resistor R4.
2. The light circuit of claim 1, further comprising: a second capacitor C2 for filtering interference signals on the touch key K1;
the positive electrode plate of the second capacitor C2 is connected to the control terminal of the second switching tube Q2, and the negative electrode plate is connected to the ground terminal.
3. The lighting lamp circuit according to claim 1, wherein the first switch tube Q1 and the third switch tube Q3 are both PNP-type triodes.
4. The lamp circuit according to claim 1, wherein the first switch tube Q1 and the third switch tube Q3 are both PMOS tubes.
5. The lighting lamp circuit according to claim 1, wherein the second switch transistor Q2 is an NPN transistor.
6. The lighting lamp circuit according to claim 1, wherein the second switch transistor Q2 is an NMOS transistor.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN204362403U true CN204362403U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520093033.5U Active CN204362403U (en) | 2015-02-10 | 2015-02-10 | A kind of lighting lamp circuit |
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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 | L ED lamp and L ED 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 | L ED lamp and L ED 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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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hirain Technologies Co.,Inc. Address before: 8 / F, block B, No. 11, Anxiang Beili, Chaoyang District, Beijing 100101 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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| CP03 | Change of name, title or address |