CN106961756A - LED drives Zooming light modulation circuit - Google Patents
LED drives Zooming light modulation circuit Download PDFInfo
- Publication number
- CN106961756A CN106961756A CN201610029072.8A CN201610029072A CN106961756A CN 106961756 A CN106961756 A CN 106961756A CN 201610029072 A CN201610029072 A CN 201610029072A CN 106961756 A CN106961756 A CN 106961756A
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- Prior art keywords
- led
- light modulation
- resistance
- pin
- current
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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Abstract
A kind of LED drives Zooming light modulation circuit, there is the base current control collector resistance characteristic using triode in a LED drive circuit, light adjusting circuit, the electric current in LED drivings in current-limiting resistance is controlled with two triodes, run with multi-channel parallel, realize stepless dimming.The dominant frequency of computer is not required thus, cost is very low.
Description
Technical field
Zooming light modulation circuit is driven the present invention relates to a kind of LED, particularly LED drives
Dynamic Zooming light modulation circuit.
Background technology
Existing LED driving light modulation is to use PWM pulsewidth light regulating technologies, due to by
Computer main frequency is limited, and cost is very high.
The content of the invention
The purpose of the present invention is overcome the shortcomings of in prior art, and provides a kind of
LED drives Zooming light modulation circuit.In this circuit, LED is controlled with two triodes
Electric current in driving in current-limiting resistance, is run with multi-channel parallel, realizes light modulation.This
Sample does not just require the dominant frequency of computer, and cost is very low.
The technical scheme is that：LED driving Zooming light modulation circuits have two electricity
Source VCC and VCC1, light emitting diode D1, diode D2, electric capacity C1, C2,
C3, inductance L1, resistance R1, R2, R3, R4, LED drive integrated circult composition
LED drive circuit, potentiometer R10 two ends connect positive supply VCC and ground respectively, sliding
Moving contact connects signal output pin K1, resistance R5, R6 parallel connection, and a termination LED drives
The current-limiting resistance pin of dynamic integrated circuit, another termination triode Q1 colelctor electrodes, Q1
Grounded emitter, base series resistor R7 meets signal input pin K2.
The present invention further technical scheme be：Triode Q1 base series resistors
R7 connects triode Q2 emitter stages, and Q2 collector series resistances R8 meets positive supply VCC,
Base series resistor R9 meets signal input pin K3.
The present invention further technical scheme be：Resistance R5, R6, R7, R8, R9,
Triode Q1, Q2, one group of LED driving Zooming light modulation circuit of composition, there is one to two
14 groups of circuit in parallel operations, resistance R5, R6 a termination Q1 colelctor electrodes,
The other end and the current-limiting resistance pin for coupling LED drive integrated circults.
When LED drives work, K1 is connected with K3, when K1 output voltages are zero,
Q1, Q2 end, and the current-limiting resistance pin electric current of LED drive integrated circults is a small value,
LED is dark.When K1 output voltages are VCC, Q2 output voltage high voltages, Q1
Electric current is maximum, and the current-limiting resistance pin electric current of LED drive integrated circults is very big
Value, LED is bright.When K1 output voltages are gradually changed into VCC from zero, Q2 output by
Gradually it is changed into high voltage from zero, Q1 electric currents are gradually changed into maximum, LED drivings from zero
The current-limiting resistance pin electric current of integrated circuit is gradually changed into maximum, LED from a small value
Lamp is gradually by secretly brightening.K1 output voltages gradually by VCC vanishing when, Q2 is defeated
Go out gradually by high voltage vanishing, Q1 electric currents are gradually by maximum vanishing, LED
The current-limiting resistance pin electric current of drive integrated circult is gradually changed into a small value from maximum,
LED is gradually by bright dimmed.
The present invention is novel in design as a result of as above circuit structure, and cost is lower,
Reliability is greatly improved, workable, using more convenient.
The detailed circuit of the present invention is made below in conjunction with the drawings and specific embodiments
Further describe.
Brief description of the drawings
Fig. 1 is the first embodiment circuit theory that LED drives Zooming light modulation circuit
Figure.
Fig. 2 is the second embodiment circuit theory that LED drives Zooming light modulation circuit
Figure.
Embodiment
In Fig. 1, LED driving Zooming light modulation circuits have two power supplys VCC and VCC1,
Light emitting diode D1, diode D2, electric capacity C1, C2, C3, inductance L1, electricity
R1, R2, R3, R4, LED drive integrated circult composition LED drive circuit are hindered,
Potentiometer R10 two ends connect positive supply VCC and ground respectively, and it is defeated that slider connects signal
Go out pin K1, resistance R5, R6 are in parallel, the limit of a termination LED drive integrated circults
Leakage resistance pin, another termination triode Q1 colelctor electrodes, Q1 grounded emitters, base
Pole series resistance R7 meets signal input pin K2.In Fig. 2, triode Q1 base stage strings
Connection resistance R7 connects triode Q2 emitter stages, and Q2 collector series resistances R8 connects just
Power supply VCC, base series resistor R9 meets signal input pin K3.Resistance R5, R6,
R7, R8, R9, triode Q1, Q2, one group of LED driving stepless-adjustment photoelectricity of composition
, there are one to two ten four groups of circuit in parallel operations, resistance R5, R6 one end in road
Connect Q1 colelctor electrodes, the other end and the current-limiting resistance for coupling LED drive integrated circults
Pin.
The course of work of first embodiment is as follows：When LED drives work, K1 and K2
Connection, when K1 output voltages are zero, Q1 cut-offs, the limit of LED drive integrated circults
Leakage resistance pin electric current is a small value, and LED is dark.When K1 output voltages are VCC,
Q1 electric currents are maximum, and the current-limiting resistance pin electric current of LED drive integrated circults is pole
Big value, LED is bright.When K1 output voltages are gradually changed into VCC from zero, Q1 electric currents
Gradually it is changed into maximum, the current-limiting resistance pin electric current of LED drive integrated circults from zero
Maximum is gradually changed into from a small value, LED is gradually by secretly brightening.K1 output electricity
When pressing gradually by VCC vanishing, Q1 electric currents are gradually by maximum vanishing, LED
The current-limiting resistance pin electric current of drive integrated circult is gradually changed into a small value from maximum,
LED is gradually by bright dimmed.
The course of work of second embodiment is as follows：When LED drives work, K1 and K3
Connection, when K1 output voltages are zero, Q1, Q2 cut-off, LED drive integrated circults
Current-limiting resistance pin electric current be a small value, LED is dark.K1 output voltages are VCC
When, Q2 output voltage high voltages, Q1 electric currents are maximum, and LED drives integrated electricity
The current-limiting resistance pin electric current on road is maximum, and LED is bright.K1 output voltages are gradually
When being changed into VCC from zero, Q2 outputs are gradually changed into high voltage from zero, Q1 electric currents by
Gradually be changed into maximum from zero, the current-limiting resistance pin electric currents of LED drive integrated circults by
Maximum is gradually changed into from a small value, LED is gradually by secretly brightening.K1 output voltages
When gradually by VCC vanishing, Q2 outputs are gradually by high voltage vanishing, Q1 electricity
Stream is gradually by maximum vanishing, the current-limiting resistance pin electricity of LED drive integrated circults
Stream is gradually changed into a small value from maximum, and LED is gradually by bright dimmed.
During multigroup LED drivings Zooming light modulation circuit work, provided due to triode
Maximum current is limited, just constitutes multigroup LED driving Zooming light modulation circuits to be supplied to
The bigger electric current of the current-limiting resistance pin of LED drive integrated circults, to improve LED
Brightness.
Claims (4)
1. a kind of LED drivings Zooming light modulation circuit has two power supplys VCC and VCC1, light
Diode D1, diode D2, electric capacity C1, C2, C3, inductance L1, resistance
R1, R2, R3, R4, LED drive integrated circult constitute LED drive circuit,
Potentiometer R10 two ends connect positive supply VCC and ground respectively, and slider connects signal
Output pin K1, it is characterized in that：Resistance R5, R6 are in parallel, and a termination LED drives
The current-limiting resistance pin of dynamic integrated circuit, another termination triode Q1 colelctor electrodes,
Q1 grounded emitters, base series resistor R7 meets signal input pin K2.
2. LED according to claim 1 drives Zooming light modulation circuit, it is characterized in that：
Triode Q1 base series resistors R7 connects triode Q2 emitter stages, Q2 current collections
Pole series resistance R8 meets positive supply VCC, and it is defeated that base series resistor R9 connects signal
Enter pin K3.
3. LED according to claim 1 drives Zooming light modulation circuit, it is characterized in that：
Q1 base series resistors R7 directly meets signal input pin K2.
4. the LED driving Zooming light modulation circuits according to claim 1,2 or 3,
It is characterized in that：Resistance R5, R6, R7, R8, R9, triode Q1, Q2,
One group of LED driving Zooming light modulation circuit is constituted, there are one to two ten four groups of circuits
Parallel running, resistance R5, R6 a termination Q1 colelctor electrodes, the other end is in parallel
Connect the current-limiting resistance pin of LED drive integrated circults.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610029072.8A CN106961756A (en) | 2016-01-09 | 2016-01-09 | LED drives Zooming light modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610029072.8A CN106961756A (en) | 2016-01-09 | 2016-01-09 | LED drives Zooming light modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106961756A true CN106961756A (en) | 2017-07-18 |
Family
ID=59480770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610029072.8A Pending CN106961756A (en) | 2016-01-09 | 2016-01-09 | LED drives Zooming light modulation circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN106961756A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116546687A (en) * | 2023-07-07 | 2023-08-04 | 广东东菱电源科技有限公司 | Multi-machine parallel three-in-one current regulation anti-interference circuit |
-
2016
- 2016-01-09 CN CN201610029072.8A patent/CN106961756A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116546687A (en) * | 2023-07-07 | 2023-08-04 | 广东东菱电源科技有限公司 | Multi-machine parallel three-in-one current regulation anti-interference circuit |
| CN116546687B (en) * | 2023-07-07 | 2023-09-19 | 广东东菱电源科技有限公司 | Multi-machine parallel three-in-one current regulation anti-interference circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170718 |
|
| WD01 | Invention patent application deemed withdrawn after publication |