CN103582227A - Dimming control circuit and lamp - Google Patents

Dimming control circuit and lamp Download PDF

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Publication number
CN103582227A
CN103582227A CN201210281108.3A CN201210281108A CN103582227A CN 103582227 A CN103582227 A CN 103582227A CN 201210281108 A CN201210281108 A CN 201210281108A CN 103582227 A CN103582227 A CN 103582227A
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CN
China
Prior art keywords
resistance
module
voltage
triode
light source
Prior art date
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.)
Pending
Application number
CN201210281108.3A
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Chinese (zh)
Inventor
周明杰
孙占民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Original Assignee
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oceans King Lighting Science and Technology Co Ltd, Shenzhen Oceans King Lighting Engineering Co Ltd filed Critical Oceans King Lighting Science and Technology Co Ltd
Priority to CN201210281108.3A priority Critical patent/CN103582227A/en
Publication of CN103582227A publication Critical patent/CN103582227A/en
Pending legal-status Critical Current

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Abstract

The embodiment of the invention provides a light source control circuit. The circuit comprises a pulse generation module connected with a power module and a light source drive module, a reference voltage module connected with the power module and the pulse generation module and a light intensity detection module connected with the power module and the pulse generation module. According to the dimming control circuit, lighting intensity of a light source can be automatically adjusted according to the lighting intensity of external environment, and the dimming control circuit has the advantages of being simple and reliable and saving energy.

Description

A kind of adjusting control circuit and light fixture
Technical field
The present invention relates to control field, relate in particular to a kind of control circuit and device of light source.
Background technology
Along with scientific and technical development, people are more and more higher to energy-conservation requirement.Existing adjusting control circuit is to regulate the voltage and current of light source to regulate the luminous intensity of light source by potentiometer, although this light-dimming method is simple, potentiometer needs to consume extra power in circuit, can not meet energy-conservation requirement; Or employing PWM(Pulse Width Modulation, pulse-width modulation) mode, the duty of regulating impulse signal recently control inputs to the power of light source, thereby control the luminous intensity of light source, conventionally the gear of setting several grades carrys out the luminous intensity of manual adjustments light source, but this method needs artificial going to adjust luminous intensity, cannot well adapt to the variation of surrounding environment, can not meet energy-conservation requirement equally.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of adjusting control circuit is provided.Can solve the large deficiency with needing manual adjustment of prior art light adjusting circuit power consumption.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of adjusting control circuit, comprising:
The pulse generation module being connected with described light source driver module with described power module, the reference voltage module being connected with described pulse generation module with described power module, the light intensity detection module being connected with described pulse generation module with described power module;
Wherein, described reference voltage module produces the reference voltage of scheduled voltage according to the voltage source of described power module input, and export described reference voltage to pulse generation module, described light intensity detection module detects the intensity of illumination of external environment condition, and convert described intensity of illumination to corresponding control Voltage-output to described pulse generation module, the described reference voltage of described pulse generation module contrast input and described control voltage are to adjust the output to the duty ratio of the pulse signal of described light source driver module, described light source driver module adjusts the output to the power of described light source load according to the pulse signal of input.
Wherein, also comprise the first electric capacity, the two ends of described the first electric capacity connect respectively the positive pole of earth terminal and described power module.
Wherein, described reference voltage module comprises the first resistance and three-terminal voltage-stabilizing chip,
The plus earth of described three-terminal voltage-stabilizing chip, the negative electrode of described three-terminal voltage-stabilizing chip is connected by described the first resistance and described power module are anodal; Described three-terminal voltage-stabilizing chip is used for providing reference voltage.
Wherein, described light intensity detection module comprises the 8th resistance, the second resistance, photo resistance,
One end of described the 8th resistance is connected with described power module is anodal, the other end of described the 8th resistance is connected with one end of described the second resistance, the other end of described the second resistance is connected with one end of described photo resistance, the other end ground connection of described photo resistance, described photo resistance is for detection of light intensity.
Wherein, described light intensity detection module also comprises voltage stabilizing didoe, and the negative electrode of described voltage stabilizing didoe connects by the other end of described the 8th resistance, the plus earth of described voltage stabilizing didoe.
Wherein, described pulse generation module comprises single-chip microcomputer, the 6th resistance, the 7th resistance, the 4th resistance, the 5th resistance, the first triode and the second triode,
The power supply input pin of described single-chip microcomputer is connected with described positive source
The grounding pin ground connection of described single-chip microcomputer;
The input pin of described single-chip microcomputer is connected with the negative electrode of described three-terminal voltage-stabilizing chip;
The light intensity of described single-chip microcomputer detects pin by photo resistance ground connection;
The emitter of described the first triode is connected with the positive pole of described power module, the emitter of described the first triode is connected by described the 4th resistance with the base stage of described the first triode, and the base stage of described the first triode is connected with the collector electrode of described the second triode by the 5th resistance;
The base stage of described the first triode is connected with Single Chip Microcomputer (SCM) PWM control pin by described the 6th resistance, and the base stage of described the second triode is by described the 7th grounding through resistance, the grounded emitter of described the second triode simultaneously.
Described the first triode is PNP triode, and described the second triode is NPN triode.
Described pulse generation module also comprises a diode, and the anode of described diode is connected with the collector electrode of described the first triode, and the negative electrode of described diode is connected with the input of described light source driver module.
In addition, the embodiment of the present invention also provides a kind of light fixture, comprises above-mentioned adjusting control circuit.
Implement the embodiment of the present invention, there is following beneficial effect:
By light intensity detection module, detect the intensity of illumination of external environment condition, convert light signal to the signal of telecommunication and feed back to pulse generation module, pulse generation module is wherein adjusted the duty ratio of output pulse signal according to the power of the signal of telecommunication, by duty cycle adjustment, export the power of light source to, thereby adjust the luminous intensity of light source, thereby can with surrounding environment, automatically adjust the luminous intensity of compensatory light, realized and saved labour intensity and energy-conservation effect.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of adjusting control circuit of the embodiment of the present invention;
Fig. 2 is a kind of circuit diagram of a kind of adjusting control circuit of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, is the structural representation of a kind of adjusting control circuit of the embodiment of the present invention, and this adjusting control circuit comprises:
Power module 100, reference voltage module 200, pulse generation module 300, light intensity detection module 400, light source driver module 500 and light source load 600, power module 100 is respectively with pulse generation module 300, the input of reference voltage module 200 is connected with the input of light intensity detection module 400, the output of reference voltage module 200 is connected with pulse generation module 300, the output of light intensity detection module 400 is connected with pulse generation module 300, the output of pulse generation module 300 is connected with the input of light source driver module 500, the output of light source driver module 500 is connected with the input of light source load.
The course of work is: in the present embodiment, power module 100 comprises DC power supply BT, the minus earth of DC power supply, and positive pole connects reference voltage module 200, and pulse generation module 300 is connected with light intensity detection module 400.The supply voltage of power module 100 output predetermined values is to reference voltage module 200, and reference voltage module 200 is according to the reference voltage of power module 100 input voltage power generation scheduled voltages, and with reference to Voltage-output to pulse generation module 300, the supply voltage of power module 100 output predetermined values is to light intensity detection module 400, and light intensity detection module 400 detects the intensity of illumination of external environment condition, and converts described intensity of illumination to corresponding control Voltage-output to pulse generation module 300, power module 100 gives pulse generation module 300 power supplies, the reference voltage of pulse generation module 300 contrast inputs and control voltage are to adjust the output to the duty ratio of the pulse signal of light source driver module 500, utilize the principle of PWW, when external light intensity becomes large, the duty ratio that exports the pulse signal of light source driver module 500 to just diminishes, when external light intensity diminishes, the duty ratio that exports the pulse signal of light source driver module 500 to just becomes large, described light source driver module 500 adjusts the output to described light source load 600 according to the pulse signal of input, duty ratio diminishes, export that the power of light source load 600 is less thereby luminous intensity is less to, it is large that duty ratio becomes, it is larger that the power that exports light source load 600 to becomes large luminous intensity.Therefore, realized surrounding environment light powerful, a little less than light source load 600 is luminous, surrounding environment light intensity is little, and the luminous strong effect of light source load 600 realizes and automatically adjusting and energy-conservation effect.
Further preferred, this adjusting control circuit also comprises the first capacitor C 1 being connected with power module 100, reference voltage module 200, pulse generation module 300 and light intensity detection module 400, the first capacitor C 1, for the alternating current component of power module output voltage described in filtering, has been guaranteed the stability of circuit working.
Implement embodiments of the invention, by light intensity detection module, detect the intensity of illumination of external environment condition, convert light signal to the signal of telecommunication and feed back to pulse generation module, pulse generation module is wherein adjusted the duty ratio of the pulse signal that exports light source to according to the power of the signal of telecommunication, thereby adjust the luminous intensity of light source, avoided so artificial adjustment, saved labour intensity, and circuit power consumption is low.
Referring to Fig. 2, is another circuit diagram of a kind of adjusting control circuit of inventive embodiments, wherein,
Comprise the first capacitor C 1, the two ends of described the first capacitor C 1 connect respectively the negative pole of earth terminal and described power module, and wherein, described the first capacitor C 1 is for the alternating current component of the voltage of power module output described in filtering.
Reference voltage module 200 comprises the first resistance R 1 and three-terminal voltage-stabilizing chip U2, and one end of the first resistance R 1 is connected power module negative pole pin with the first capacitor C 1 is connected; The other end of the first resistance R 1 is connected with pulse generation module; The other end of the first resistance R 1 is connected with the control utmost point with the negative electrode of three-terminal voltage-stabilizing chip U2; The plus earth of three-terminal voltage-stabilizing chip U2.
Light intensity detection module 400 comprises the 8th resistance R 8, the second resistance R 2, photo resistance R3, and one end of the 8th resistance R 8 is connected with the pin that is connected power module negative pole of the first capacitor C 1, and one end of the other end second resistance R 2 of the 8th resistance R 8 connects; The other end of the second resistance R 2 is connected with one end of photo resistance R3 with the 3rd input of pulse generation module 300; The other end ground connection of photo resistance R3.Further preferred, light intensity detection module 400 also comprises voltage stabilizing didoe D1, and the negative electrode of voltage stabilizing didoe D1 is connected with one end of the second resistance R 2 with the other end of the 8th resistance R 8 respectively, the plus earth of voltage stabilizing didoe D1.
Pulse generation module 300 comprises single-chip microcomputer U1, the 6th resistance R 6, the 7th resistance R 7, the 4th resistance R 4, the 5th resistance R 5, the first triode Q1 and the second triode Q2, the first triode Q1 is preferably PNP triode, and the second triode Q2 is preferably NPN triode.It is embodiment that the present embodiment be take 8 pin single-chip microcomputers, can certainly adopt other single-chip microcomputers, and specific embodiment does not limit.Single-chip microcomputer U1 the 1st pin (RESET) is resetting pin, do not define herein, the 2nd pin (PB3) is output input pin, do not define herein yet, the 3rd pin (PB4) is input pin, by the first resistance R 1, be connected with power supply BT is anodal, by three-terminal voltage-stabilizing chip, U2 is connected with GND, three-terminal voltage-stabilizing chip U2 provides reference voltage for the 3rd pin, the 4th pin (GND) is grounding leg, direct ground connection, the 5th pin (PB0) is external environment light intensity detection pin, by dividing potential drop the second resistance R 2, be connected with voltage stabilizing didoe D1 negative electrode, again by photo resistance R3 ground connection, photo resistance R3 will be placed in the external environment that needs sampling, voltage stabilizing didoe D1 negative electrode is connected with power supply BT is anodal by the 8th resistance R 8, the direct ground connection of anode, the 6th pin (PB1) is output input pin, do not define herein yet, the 7th pin (PB2) is PWM control pin, by current limliting the 6th resistance R 6, be connected with the second triode Q2 base stage, the 8th pin (VCC) is power supply input pin, be connected with power supply BT is anodal.
The course of work is, after switching on power, photo resistance R3 is converted to the light signal sampling to control Voltage Feedback to the 5th pin (light intensity detection pin) of single-chip microcomputer U1, single-chip microcomputer U1 compares calculating by the reference voltage of input and control voltage, adopt PWM mode, according to the height of controlling voltage signal, adjust the duty ratio of the pulse signal of single-chip microcomputer U1 the 7th pin (PWM control pin), thereby control the operating state of PNP triode Q1 and the second triode Q2, according to the Duty ratio control of pulse signal, offer the energy that LED drives, thereby regulate the luminous intensity of light source load.
When external environment condition luminous intensity diminishes gradually, photo resistance R3 resistance increases, pressure drop on photo resistance R3 increases, the control voltage of the 5th pin of single-chip microcomputer U1 (light intensity detection pin) input is also higher, and single-chip microcomputer U1 will adjust the duty ratio of the pulse signal of its 7th pin (PWM control pin) output, and duty ratio is increased, the first triode Q1 ON time is longer, the energy that offers light source load driver module is just more, and light source load is just brighter, when duty ratio reaches 100%, reaches high-high brightness.
The contrary external environment condition illumination intensity of working as becomes large gradually, photo resistance R3 resistance reduces gradually, pressure drop on photo resistance R3 reduces gradually, the control voltage of the 5th pin of single-chip microcomputer U1 (light intensity detection pin) input is also lower, single-chip microcomputer U1 will adjust the duty ratio of the pulse signal of its 7th pin (PWM control pin) output, duty ratio is progressively reduced, the first triode Q1 ON time shortens, the energy that offers light source load driver module is just fewer, light source load is just dimmed, until the first triode Q1 turn-offs and extinguishes.
Implement embodiments of the invention, adopt the mode of PWM, can automatically control according to the size of external light intensity, single-chip microcomputer can be according to the height of the control voltage of the 5th pin (light intensity detection pin) input, automatically control the duty ratio of the pulse signal of its 7th pin (PWM control pin) output, to flowing through the energy of light source load driver module, control, have advantages of simple and reliable and energy-conservation
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, one of ordinary skill in the art will appreciate that all or part of flow process that realizes above-described embodiment, and the equivalent variations of doing according to the claims in the present invention, still belong to the scope that invention is contained.

Claims (9)

1. a control circuit for light source, comprises power module, light source driver module and light source load, it is characterized in that, also comprises:
The pulse generation module being connected with described light source driver module with described power module, the reference voltage module being connected with described pulse generation module with described power module, the light intensity detection module being connected with described pulse generation module with described power module;
Wherein, described reference voltage module produces the reference voltage of scheduled voltage according to the voltage source of described power module input, and export described reference voltage to pulse generation module, described light intensity detection module detects the intensity of illumination of external environment condition, and convert described intensity of illumination to corresponding control Voltage-output to described pulse generation module, the described reference voltage of described pulse generation module contrast input and described control voltage are to adjust the output to the duty ratio of the pulse signal of described light source driver module, described light source driver module adjusts the output to the power of described light source load according to the pulse signal of input.
2. control circuit as claimed in claim 1, is characterized in that, also comprises the first electric capacity, and the two ends of described the first electric capacity connect respectively the positive pole of earth terminal and described power module.
3. control circuit as claimed in claim 2, is characterized in that, described reference voltage module comprises the first resistance and three-terminal voltage-stabilizing chip,
The plus earth of described three-terminal voltage-stabilizing chip, the negative electrode of described three-terminal voltage-stabilizing chip is connected by described the first resistance and described power module are anodal; Described three-terminal voltage-stabilizing chip is used for providing reference voltage.
4. control circuit as claimed in claim 3, is characterized in that, described light intensity detection module comprises the 8th resistance, the second resistance, photo resistance,
One end of described the 8th resistance is connected with described power module is anodal, the other end of described the 8th resistance is connected with one end of described the second resistance, the other end of described the second resistance is connected with one end of described photo resistance, the other end ground connection of described photo resistance, described photo resistance is for detection of light intensity.
5. control circuit as claimed in claim 4, is characterized in that, described light intensity detection module also comprises voltage stabilizing didoe, and the negative electrode of described voltage stabilizing didoe connects by the other end of described the 8th resistance, the plus earth of described voltage stabilizing didoe.
6. the control circuit as described in claim 4 or 5, is characterized in that, described pulse generation module comprises single-chip microcomputer, the 6th resistance, the 7th resistance, the 4th resistance, the 5th resistance, the first triode and the second triode,
The power supply input pin of described single-chip microcomputer is connected with described positive source
The grounding pin ground connection of described single-chip microcomputer;
The input pin of described single-chip microcomputer is connected with the negative electrode of described three-terminal voltage-stabilizing chip;
The light intensity of described single-chip microcomputer detects pin by photo resistance ground connection;
The emitter of described the first triode is connected with the positive pole of described power module, the emitter of described the first triode is connected by described the 4th resistance with the base stage of described the first triode, and the base stage of described the first triode is connected with the collector electrode of described the second triode by the 5th resistance;
The base stage of described the second triode is connected with Single Chip Microcomputer (SCM) PWM control pin by described the 6th resistance, and the base stage of described the second triode is by described the 7th grounding through resistance, the grounded emitter of described the second triode simultaneously.
7. control circuit as claimed in claim 6, is characterized in that, described the first triode is PNP triode, and described the second triode is NPN triode.
8. control circuit as claimed in claim 7, it is characterized in that, described pulse generation module also comprises a diode, and the anode of described diode is connected with the collector electrode of described the first triode, and the negative electrode of described diode is connected with the input of described light source driver module.
9. a light fixture, is characterized in that, comprises the control circuit as described in claim 1-8 any one.
CN201210281108.3A 2012-08-09 2012-08-09 Dimming control circuit and lamp Pending CN103582227A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104981043A (en) * 2014-04-01 2015-10-14 吴燕珊 Automatic dimming lamp circuit
CN108513394A (en) * 2018-03-23 2018-09-07 佛山德仁照明科技有限公司 A kind of LED lamp slowly started

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CN2245319Y (en) * 1995-05-23 1997-01-15 王志军 Controller for illuminating lamp and lanterns
CN201037611Y (en) * 2007-04-29 2008-03-19 费子翔 LED desk lamp with automatic light stabilizing function
CN101404376A (en) * 2008-10-27 2009-04-08 无锡市中兴光电子技术有限公司 Automatic temperature control apparatus of pump laser for ASE broadband light source
CN102158083A (en) * 2011-04-22 2011-08-17 复旦大学 BUCK converter for stabilizing output light flux of LED (light-emitting diode)
CN102291866A (en) * 2010-06-17 2011-12-21 富士迈半导体精密工业(上海)有限公司 Lamp control circuit
CN102395235A (en) * 2011-11-04 2012-03-28 深圳市新超亮特种显示设备有限公司 Energy saving lamp box control circuit and energy saving lamp box
CN102548089A (en) * 2010-12-16 2012-07-04 杭州奥能照明电器有限公司 Multi-channel light adjustable light-emitting diode driving power source

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2245319Y (en) * 1995-05-23 1997-01-15 王志军 Controller for illuminating lamp and lanterns
CN201037611Y (en) * 2007-04-29 2008-03-19 费子翔 LED desk lamp with automatic light stabilizing function
CN101404376A (en) * 2008-10-27 2009-04-08 无锡市中兴光电子技术有限公司 Automatic temperature control apparatus of pump laser for ASE broadband light source
CN102291866A (en) * 2010-06-17 2011-12-21 富士迈半导体精密工业(上海)有限公司 Lamp control circuit
CN102548089A (en) * 2010-12-16 2012-07-04 杭州奥能照明电器有限公司 Multi-channel light adjustable light-emitting diode driving power source
CN102158083A (en) * 2011-04-22 2011-08-17 复旦大学 BUCK converter for stabilizing output light flux of LED (light-emitting diode)
CN102395235A (en) * 2011-11-04 2012-03-28 深圳市新超亮特种显示设备有限公司 Energy saving lamp box control circuit and energy saving lamp box

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104981043A (en) * 2014-04-01 2015-10-14 吴燕珊 Automatic dimming lamp circuit
CN108513394A (en) * 2018-03-23 2018-09-07 佛山德仁照明科技有限公司 A kind of LED lamp slowly started

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Application publication date: 20140212