CN203722864U - Light modulation circuit - Google Patents
Light modulation circuit Download PDFInfo
- Publication number
- CN203722864U CN203722864U CN201320815315.2U CN201320815315U CN203722864U CN 203722864 U CN203722864 U CN 203722864U CN 201320815315 U CN201320815315 U CN 201320815315U CN 203722864 U CN203722864 U CN 203722864U
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- CN
- China
- Prior art keywords
- control chip
- singlechip control
- effect transistor
- field effect
- led lamp
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a light modulation circuit which comprises a single-chip microcomputer control chip, a peripheral circuit, an LED lamp, a switch, a touch point, an amplification circuit and a field effect transistor. The peripheral circuit is connected with the single-chip microcomputer control chip to supply power to the single-chip microcomputer control chip; one end of the switch is connected with a signal input terminal of the single-chip microcomputer control chip, and the other end of the switch is grounded to control a light modulation mode; the touch point is connected with a signal input terminal of the single-chip microcomputer control chip via a first resistor to adjust the brightness of the LED lamp; the amplification circuit is connected with a signal input terminal of the single-chip microcomputer control chip to amplify output signals; and the grid electrode of the field effect transistor is connected with the output end of the amplification circuit, the source electrode of the field effect transistor is grounded, and the drain electrode of the field effect transistor is connected with one end of the LED lamp. The light modulation circuit can realize sectional light modulation as well as stepless light modulation.
Description
Technical field
The utility model relates to a kind of light adjusting circuit.
Background technology
The LED lamp light adjusting circuit occurring mostly at present is the light adjusting circuit of simple segmented light-modulating mode or the light adjusting circuit of simple stepless light-modulating mode.If notification number is the disclosed light adjusting circuit of Chinese utility model patent " universal switching segmented dimmer circuit driving for great power LED " of CN201690645U (application number is CN201020146765.3), only there is the sectional dimming function to LED lamp, there are multiple gears capable of circulation.Bulletin is the light adjusting circuit in the Chinese utility model patent " a kind of stepless dimming pattern electric torch circuit " of CN202979462U (application number is CN201220752786.9), can provide a kind of calculation simple to operate and random brightness novel light-modulating mode-stepless dimming, cruelly dodge pattern, stepless-adjustment luminous energy is selected any brightness of 1%～100% scope, under arbitrary patterns, double-click switch and just can realize sudden and violent sudden strain of a muscle pattern.
But current LED lamp can not be realized the light adjusting circuit that segmented light-modulating mode and stepless light-modulating mode coexist simultaneously, application surface is narrow, can not meet the demand of people to the multiple light-modulating mode of LED lamp, to meet the demand under varying environment condition.
Utility model content
Technical problem to be solved in the utility model is to provide one both can carry out segmented light modulation, the light adjusting circuit that can carry out again stepless light modulation for above-mentioned prior art.
The technical scheme in the invention for solving the above technical problem is: a kind of light adjusting circuit, comprises
Singlechip control chip;
Peripheral circuit, is connected with singlechip control chip, is singlechip control chip power supply;
LED lamp, wherein one end connects power supply;
Switch, one end connects a signal input terminal of singlechip control chip, and other end ground connection is controlled light-modulating mode;
Hand contact, is connected in a signal input terminal of singlechip control chip, for regulating the brightness of LED lamp by the first resistance;
Amplifying circuit, is connected in a signal output terminal of singlechip control chip, for amplifying output signal;
Field effect transistor, the grid of described field effect transistor is connected in the output of amplifying circuit, the source ground of described field effect transistor, the drain electrode of described field effect transistor connects the other end of LED lamp.
Preferably, described amplifying circuit comprises triode, the base stage of described triode is connected in the pwm signal lead-out terminal of singlechip control chip by the second resistance, the emitter of described triode is connected in the power supply terminal VCC of singlechip control chip, and the collector electrode of described triode is by the 3rd grounding through resistance;
Preferably, described triode is PNP triode.
Preferably, described field effect transistor is the field effect transistor MOSFET-N1 of N ditch enhancement mode.
Preferably, described peripheral circuit comprises power supply, electric capacity and ground wire, power supply terminal VCC in described singlechip control chip connects power supply, earth terminal GND in described singlechip control chip connects ground wire, described electric capacity is connected in singlechip control chip on a terminal, and the other end connects ground wire.
Preferably, described singlechip control chip is MC20P68.
Compared with prior art, the utility model has the advantage of: the light adjusting circuit in the utility model has stepless dimming function and segmented dimming function, the problem that has solved the single dimming mode of current LED lamp, application is wider, can meet the different requirements of people to illumination demand.In the time carrying out pattern exchange, only exchange switch by pattern and carry out model selection, simple to operate.Under stepless light-modulating mode, can realize any brightness of LED lamp 0～100% scope, people can regulate arbitrarily the LED lamp brightness needing, under segmented light-modulating mode, touch hand contact and set the different choice of brightness by finger, can find fast the LED lamp brightness needing.
Brief description of the drawings
Fig. 1 is light adjusting circuit in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in Figure 1, the light adjusting circuit in the present embodiment, comprises
Singlechip control chip U1;
Peripheral circuit, U1 is connected with singlechip control chip, is singlechip control chip U1 power supply; Described peripheral circuit comprises power supply, capacitor C 1, capacitor C 2 and ground wire, power supply terminal VCC in described singlechip control chip U1 connects power supply, earth terminal GND in described singlechip control chip U1 connects ground wire, described capacitor C 1, C2 is connected on the P60 terminal in singlechip control chip U1, the other end connects ground wire, the P63 terminal ground connection in singlechip control chip U1.
LED lamp, wherein one end connects power supply, and the other end connects the drain electrode of field effect transistor Q2;
Switch SW, one end connects the P61 terminal of singlechip control chip U1, and other end ground connection is controlled light-modulating mode;
Hand contact T1, is connected in the P62 terminal of singlechip control chip U1, for regulating the brightness of LED lamp by the first resistance R 1;
Amplifying circuit, be connected in the P64 terminal of singlechip control chip U1, be used for amplifying output signal, described amplifying circuit comprises triode Q1, the base stage of described triode Q1 is connected in the pwm signal lead-out terminal P64 of singlechip control chip U1 by the second resistance R 2, the emitter of described triode Q1 is connected in the power supply terminal VCC of singlechip control chip U1, and the collector electrode of described triode Q1 is by the 3rd resistance R 3 ground connection;
Field effect transistor Q2, the grid of described field effect transistor Q2 is connected in the collector electrode of triode Q1, the source ground of described field effect transistor Q2, the drain electrode of described field effect transistor Q2 connects the other end of LED lamp.
Described triode Q1 is PNP triode.
Described field effect transistor Q2 is the field effect transistor MOSFET-N1 of N ditch enhancement mode.
Described singlechip control chip U1 is MC20P68.
When use, in the time that switch SW disconnects, for stepless light-modulating mode, now, finger touches hand contact T1, the LED that accounts for setting according to the touch time reaches the ratio of the time that 100% brightness needs, reach the brightness of corresponding proportion, finger touches after the T1 of hand contact, singlechip control chip U1 is to the upper P60 of singlechip control chip U1, the pin signal of P61 and P62 detects, detect after signal, P64 pin output duty cycle continually varying pwm signal on control single chip computer control chip, PNP triode Q1 is with pwm signal control conducting, and then conducting field effect transistor Q2, thereby LED lamp is changed in 0～100% brightness range.Exceed time of 100% brightness needs of setting when the touch time, LED lamp continuous circulation in 0～100% brightness range changes.
In the time that switch SW is closed, be segmented light-modulating mode, segmentation brightness can have different settings according to different needs.For example segmented light-modulating mode can comprise 100% brightness, 50% brightness and 25% brightness three-stage dimming brightness, carries out light adjusting circuit under segmented light-modulating mode describe as example.Finger touches hand contact T1, touch hand contact T1 once, LED lamp reaches 25% brightness, touch again hand contact, touch hand contact T1 twice, LED lamp reaches 50% brightness, then touches hand contact T1, touches hand contact T1 for the third time, LED lamp reaches 100% brightness, touch hand contact T1 the 4th time, LED lamp extinguishes again, and touches hand contact T1 the 5th time, LED lamp reaches 25% brightness again, by that analogy, according to the signal that touches hand contact T1, the circulation change of different brightness sections is carried out in the brightness of LED lamp.Touch after the T1 of hand contact, singlechip control chip U1 detects the pin signal of singlechip control chip U1 upper P60, P61 and P62, detect after signal, the upper P64 pin output duty cycle continually varying pwm signal of control single chip computer control chip U1, PNP triode Q1 is with pwm signal control conducting, and then conducting field effect transistor Q2, thereby make LED lamp carry out lighting of corresponding segment brightness according to the change in duty cycle of pwm signal.
Light adjusting circuit in the present embodiment is applicable to head lamp, in the LED light fixture articles for use of the tunable optical such as flashlight.
Claims (6)
1. a light adjusting circuit, comprises
Singlechip control chip (U1);
Peripheral circuit, is connected with singlechip control chip (U1), is singlechip control chip (U1) power supply;
LED lamp, wherein one end connects power supply;
It is characterized in that: also comprise
Switch (SW), one end connects a signal input terminal of singlechip control chip (U1), and other end ground connection is controlled light-modulating mode;
Hand contact (T1), is connected in a signal input terminal of singlechip control chip (U1), for regulating the brightness of LED lamp by the first resistance (R1);
Amplifying circuit, is connected in a signal output terminal of singlechip control chip (U1), for amplifying output signal;
Field effect transistor (Q2), the grid of described field effect transistor (Q2) is connected in the output of amplifying circuit, the source ground of described field effect transistor (Q2), the drain electrode of described field effect transistor (Q2) connects the other end of LED lamp.
2. light adjusting circuit according to claim 1, it is characterized in that: described amplifying circuit comprises triode (Q1), the base stage of described triode (Q1) is connected in the pwm signal lead-out terminal of singlechip control chip (U1) by the second resistance (R2), the emitter of described triode (Q1) is connected in the power supply terminal VCC of singlechip control chip (U1), and the collector electrode of described triode (Q1) is by the 3rd resistance (R3) ground connection.
3. light adjusting circuit according to claim 2, is characterized in that: described triode (Q1) is PNP triode.
4. light adjusting circuit according to claim 1, is characterized in that: the field effect transistor MOSFET-N1 that described field effect transistor (Q2) is N ditch enhancement mode.
5. light adjusting circuit according to claim 1, it is characterized in that: described peripheral circuit comprises power supply, electric capacity (C1, and ground wire C2), power supply terminal VCC in described singlechip control chip (U1) connects power supply, earth terminal GND in described singlechip control chip (U1) connects ground wire, described electric capacity (C1, C2) is connected in singlechip control chip (U1) on a terminal, and the other end connects ground wire.
6. according to the light adjusting circuit described in the arbitrary claim of claim 1-5, it is characterized in that: described singlechip control chip (U1) is MC20P68.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815315.2U CN203722864U (en) | 2013-12-11 | 2013-12-11 | Light modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815315.2U CN203722864U (en) | 2013-12-11 | 2013-12-11 | Light modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203722864U true CN203722864U (en) | 2014-07-16 |
Family
ID=51161981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320815315.2U Expired - Fee Related CN203722864U (en) | 2013-12-11 | 2013-12-11 | Light modulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203722864U (en) |
-
2013
- 2013-12-11 CN CN201320815315.2U patent/CN203722864U/en not_active Expired - Fee Related
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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: 20140716 Termination date: 20151211 |
|
| EXPY | Termination of patent right or utility model |