CN210781438U - Brightness adjusting system of lamp - Google Patents
Brightness adjusting system of lamp Download PDFInfo
- Publication number
- CN210781438U CN210781438U CN201921178749.XU CN201921178749U CN210781438U CN 210781438 U CN210781438 U CN 210781438U CN 201921178749 U CN201921178749 U CN 201921178749U CN 210781438 U CN210781438 U CN 210781438U
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistor
- capacitor
- current
- bipolar transistor
- 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.)
- Active
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a brightness control system of lamps and lanterns, including voltage regulation module, current regulation module and LED module, voltage regulation module includes voltage output unit and voltage regulation unit, voltage output unit includes switch type voltage control circuit, voltage adjustment comparison circuit and voltage sampling circuit, switch type voltage control circuit is connected with current regulation module, voltage adjustment comparison circuit and voltage sampling circuit respectively, voltage adjustment comparison circuit is connected with voltage regulation unit and voltage sampling circuit respectively, current regulation module is connected with the LED module. The utility model discloses a voltage output unit output DC voltage with adopt the linear regulation direct current voltage value of voltage regulation unit, the current regulation module is according to the linear regulation output direct current of direct current voltage value to adopt direct current drive LED module, realize the luminance of linear regulation lamps and lanterns, but wide application in LED lamp control technical field.
Description
Technical Field
The utility model relates to a LED lamp control technical field especially relates to a brightness control system of lamps and lanterns.
Background
With the development of LED technology, LED lamps are commonly used in various functional lighting and landscape lighting scenes. At present, direct current LED lamps with safe voltage are adopted in many scenes, and most of the LED lamps are additionally provided with a dimming function based on market demands. Currently, there are two ways of dimming: one is to perform dimming control by additionally providing a signal line on the spot, and although dimming is accurate, the spot wiring is complicated and cannot be generally used. In addition, a constant voltage current limiting mode is adopted in the lamp for supplying power, and the brightness is adjusted by adjusting the power supply voltage, but due to the influence of the volt-ampere characteristic of the LED, the constant voltage current limiting adjustment mode cannot realize linear dimming in the dimming process, so that a user can hardly select the required brightness. And because of the existence of circuit voltage drop, can't make the brightness of the LED lamp in the lamps and lanterns unanimous, and adopt the method of constant voltage current limiting to burn out the LED very easily.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the present invention provides a brightness adjustment system for a lamp.
The utility model adopts the technical proposal that:
the utility model provides a brightness control system of lamps and lanterns, includes voltage regulation module, current regulation module and LED module, voltage regulation module includes voltage output unit and voltage regulation unit, voltage output unit includes switch type voltage control circuit, voltage adjustment comparison circuit and voltage sampling circuit, switch type voltage control circuit is connected with current regulation module, voltage adjustment comparison circuit and voltage sampling circuit respectively, voltage adjustment comparison circuit is connected with voltage regulation unit and voltage sampling circuit respectively, current regulation module is connected with the LED module.
Further, the switch-type voltage control circuit comprises a first resistor, a first NPN bipolar transistor and a second NPN bipolar transistor;
the collector of the first NPN bipolar transistor is respectively connected with a power supply and one end of a first resistor, the other end of the first resistor is connected with the collector of a second NPN bipolar transistor, the base of the second NPN bipolar transistor is connected with a voltage regulation comparison circuit, the emitter of the second NPN bipolar transistor is connected with the base of the first NPN bipolar transistor, and the emitter of the first NPN bipolar transistor is respectively connected with a voltage sampling circuit and a current regulation module.
Further, the voltage sampling circuit comprises a second resistor, a first adjustable resistor and a fourth resistor, wherein a first end of the first adjustable resistor is connected to an emitter of the first NPN type bipolar transistor through the second resistor, and a second end of the first adjustable resistor is grounded through the fourth resistor;
the voltage regulation comparison circuit comprises an amplifier, a fifth resistor, a sixth resistor and a first capacitor;
the inverting input end of the amplifier is connected with the third end of the first adjustable resistor, the non-inverting input end of the amplifier is connected with the voltage adjusting unit through the fifth resistor, the output end of the amplifier is connected with the base electrode of the second NPN type bipolar transistor through the sixth resistor, one end of the first capacitor is connected with the inverting input end of the amplifier, and the other end of the first capacitor is connected with the output end of the amplifier.
Further, the voltage regulation unit comprises a first processor and a voltage regulation circuit, the voltage regulation circuit comprises a first connector and a second adjustable resistor, and the first connector is correspondingly connected with the first processor;
the first end of the second adjustable resistor is connected with the first pin of the first connector, the second end of the second adjustable resistor is connected with the second pin of the first connector, the third end of the second adjustable resistor is connected with the third pin of the first connector, and the fourth pin of the first processor is connected with the non-inverting input end of the amplifier through a fifth resistor.
Further, the voltage regulation unit further comprises a filter circuit, and the filter circuit comprises a seventh resistor, an eighth resistor, a second capacitor and a third capacitor;
the fourth pin of the first processor is grounded with the third capacitor through the eighth resistor in sequence, the seventh resistor and the second capacitor are connected in series and then connected in parallel with the third capacitor, and the connection point of the seventh resistor and the second capacitor is connected with the non-inverting input end of the amplifier through the fifth resistor.
Further, the current regulating module comprises a current output unit and a current regulating unit, the current regulating unit is connected with an emitter of the first NPN type bipolar transistor, and the current output unit comprises a constant current chip, an inductor, a diode and a fourth capacitor;
the sixth pin of the constant current chip is connected with the current regulating unit, the eighth pin of the constant current chip is respectively connected with the anode of the diode and one end of the inductor, the other end of the inductor is connected with the LED module, the cathode of the diode is connected with the power supply, one end of the fourth capacitor is connected with the power supply, and the other end of the fourth capacitor is grounded.
Further, the current adjusting unit comprises a second processor, a second connector, a ninth resistor and a third adjustable resistor, wherein the second processor is correspondingly connected with the second connector;
the first end of the third adjustable resistor is connected with the emitter of the first NPN bipolar transistor, the second end of the third adjustable resistor is connected with the first pin of the second connector, the third end of the third adjustable resistor is connected with the third pin of the second connector, and the fourth pin of the second processor is connected to the sixth pin of the constant current chip through a ninth resistor.
Further, the voltage regulating unit further comprises a key circuit, and the key circuit comprises a switch key, a tenth resistor, an eleventh resistor and a polar capacitor;
the positive pole of the polar capacitor is connected with a power supply, the negative pole of the polar capacitor is grounded through an eleventh resistor, the switch key and the tenth resistor are connected in series and then connected in parallel with the polar capacitor, and the negative pole of the polar capacitor is connected with a ninth pin of the first processor.
The utility model has the advantages that: the utility model provides a brightness control system of lamps and lanterns, includes voltage regulation module, current regulation module and LED module, voltage regulation module includes voltage output unit and voltage regulation unit, voltage output unit includes switch type voltage control circuit, voltage adjustment comparison circuit and voltage sampling circuit, switch type voltage control circuit is connected with current regulation module, voltage adjustment comparison circuit and voltage sampling circuit respectively, voltage adjustment comparison circuit is connected with voltage regulation unit and voltage sampling circuit respectively, current regulation module is connected with the LED module. The utility model adopts the voltage output unit to output the direct voltage and adopts the voltage adjusting unit to linearly adjust the direct voltage value, the current adjusting module linearly adjusts the output direct current according to the direct voltage value and adopts the direct current to drive the LED module, thereby realizing the linear adjustment of the brightness of the lamp and solving the problem that the brightness of the lamp can not be linearly adjusted; in addition, the LED lamps are driven by current, so that the brightness of the LED lamps in the lamp is consistent, and the safety of the lamp is improved.
Drawings
Fig. 1 is a block diagram of a brightness adjusting system of a lamp according to the present invention;
FIG. 2 is an electronic circuit diagram of a voltage output unit in an embodiment;
FIG. 3 is an electrical circuit diagram of a first processor and filter circuit in an embodiment;
FIG. 4 is an electronic circuit diagram of a voltage regulation circuit in an exemplary embodiment;
FIG. 5 is an electronic circuit diagram of a current output unit in an exemplary embodiment;
FIG. 6 is an electronic circuit diagram of a second processor in an exemplary embodiment;
FIG. 7 is an electrical circuit diagram of a second connector and a ninth resistor in an exemplary embodiment;
FIG. 8 is an electrical circuit diagram of a keying circuit in an embodiment.
Detailed Description
As shown in fig. 1 and fig. 2, this embodiment provides a brightness adjusting system of a lamp, including a voltage adjusting module, a current adjusting module and an LED module, the voltage adjusting module includes a voltage output unit and a voltage adjusting unit, the voltage output unit includes a switch-type voltage control circuit 1, a voltage adjustment comparison circuit 2 and a voltage sampling circuit 3, the switch-type voltage control circuit 1 is respectively connected with the current adjusting module, the voltage adjustment comparison circuit 2 and the voltage sampling circuit 3, the voltage adjustment comparison circuit 2 is respectively connected with the voltage adjusting unit and the voltage sampling circuit 3, and the current adjusting module is connected with the LED module.
The voltage adjusting module provides fixed voltage for the current adjusting module, the voltage adjusting module comprises a voltage output unit and a voltage adjusting unit, when a user wants to adjust the brightness of the lamp, brightness adjusting information is input on the voltage adjusting unit, and the voltage output unit linearly adjusts output voltage according to the brightness adjusting information, namely, the voltage value is linearly provided for the current adjusting module. Wherein, the user can input the brightness adjustment information in various ways, such as by setting the rotating component, the user linearly changes the voltage value by changing the rotating angle, or by setting the key for brightness adjustment and the key for dimming, the user linearly changes the voltage value by the number of times of the key pressing. Specifically, the voltage adjusting unit is configured to output voltage regulation information after acquiring the input brightness adjustment information; referring to fig. 2, in this embodiment, the input of the voltage output unit is a 24V dc voltage, and the 24V dc voltage may be obtained by converting 220V ac mains power through an existing power supply device, or may be directly provided by a 24V dc charging battery. The voltage output unit comprises a switch type voltage control circuit 1, a voltage regulation comparison circuit 2 and a voltage sampling circuit 3, wherein the switch type voltage control circuit 1 is used for regulating direct current output voltage according to the working frequency of an electronic switching tube, and the input voltage of the switch type voltage control circuit 1 is 24V (DC). The voltage sampling circuit 3 is used for sampling the direct current output voltage and transmitting the acquired voltage to the voltage regulation comparison circuit 2. The voltage regulation comparison circuit 2 is used for controlling the switching frequency of the electronic switching tube by combining the voltage regulation and control information and the voltage collected by the voltage sampling circuit 3, so that stable direct-current voltage output is obtained.
The current adjusting module is used for linearly adjusting output current according to the direct current output voltage and a preset conversion coefficient, and driving the output current to the LED module. Due to the fact that the current is adopted to drive the LED module, the influence of volt-ampere characteristics of the LED is avoided, and the brightness of the LED is enabled to change along with the linearity of input brightness adjusting information. If adopt voltage drive LED lamp, because there is LED volt-ampere characteristic, when the user adjusts lamps and lanterns luminance through changing voltage, some partial luminance sensitivity that can appear is high, some local sensitivity is low, for example under the bright circumstances of lamps and lanterns, the user only needs input a small amount of regulation information, the luminance of lamps and lanterns changes greatly, and under the darker circumstances of lamps and lanterns, the user has input more regulation information, luminance change is not big, so the user hardly adjusts the luminance that oneself needs, user's experience has been reduced, and through the system, adopt current drive LED module, can adjust drive current's size linearly, consequently, can adjust the luminance of lamps and lanterns linearly, user's operation experience has been improved. In addition, the LED module is driven by current, when the LED module is connected in series, the brightness of the LED lamp in the lamp is consistent, the LED is not easy to burn, and the safety of the lamp is improved.
The voltage output unit further comprises a front end filter circuit and an output filter circuit, and the front end filter circuit and the output filter circuit are used for filtering noise waves in the circuit and improving the stability of the direct current output voltage.
Referring to fig. 2, further as a preferred embodiment, the switch-type voltage control circuit 1 includes a first resistor R1, a first NPN bipolar transistor Q1, and a second NPN bipolar transistor Q2;
the collector of the first NPN bipolar transistor Q1 is connected to a power supply and one end of a first resistor R1, the other end of the first resistor R1 is connected to the collector of a second NPN bipolar transistor Q2, the base of the second NPN bipolar transistor Q2 is connected to the voltage regulation comparator circuit 2, the emitter of the second NPN bipolar transistor Q2 is connected to the base of the first NPN bipolar transistor Q1, and the emitter of the first NPN bipolar transistor Q1 is connected to the voltage sampling circuit 3 and the current regulation module, respectively.
The second NPN bipolar transistor Q2 may be implemented by using an existing bipolar transistor as an electronic switching transistor, and in this embodiment, the first NPN bipolar transistor Q1 is implemented by using a chip with a type of tip41c, which may further improve the stability of the switching voltage control circuit 1.
Referring to fig. 2, further as a preferred embodiment, the voltage sampling circuit 3 includes a second resistor R2, a first adjustable resistor R3 and a fourth resistor R4, a first end of the first adjustable resistor R3 is connected to an emitter of a first NPN bipolar transistor Q1 through the second resistor R2, and a second end of the first adjustable resistor R3 is grounded through the fourth resistor R4;
the voltage regulation comparison circuit 2 comprises an amplifier U1, a fifth resistor R5, a sixth resistor R6 and a first capacitor C1;
the inverting input end of the amplifier U1 is connected with the third end of the first adjustable resistor R3, the non-inverting input end of the amplifier U1 is connected with the voltage adjusting unit through the fifth resistor R5, the output end of the amplifier U1 is connected with the base of the second NPN type bipolar transistor Q2 through the sixth resistor R6, one end of the first capacitor C1 is connected with the inverting input end of the amplifier U1, and the other end of the first capacitor C1 is connected with the output end of the amplifier U1.
In this embodiment, the voltage sampling circuit 3 includes three resistors, and obtains the sampling voltage from the first adjustable resistor R3. The inverting input end of the voltage regulation comparison circuit 2 inputs the voltage sampled by the voltage sampling circuit 3, the non-inverting input end of the voltage regulation comparison circuit 2 inputs the voltage regulation information output by the voltage regulation unit, and the amplifier U1 controls the switching frequency of the second NPN type bipolar transistor Q2 by combining the sampled voltage and the voltage regulation information. The first capacitor C1 plays a feedback role, and improves the stability of the voltage regulation comparison circuit 2.
Referring to fig. 3 and 4, further as a preferred embodiment, the voltage regulating unit includes a first processor U2 and a voltage regulating circuit including a first connector J1 and a second adjustable resistor R10, the first connector J1 is correspondingly connected to the first processor U2;
a first end of the second adjustable resistor R10 is connected to a first pin of the first connector J1, a second end of the second adjustable resistor R10 is connected to a second pin of the first connector J1, a third end of the second adjustable resistor R10 is connected to a third pin of the first connector J1, and a fourth pin of the first processor U2 is connected to a non-inverting input terminal of the amplifier U1 through a fifth resistor R5.
The second adjustable resistor R10 is used as an input port of brightness adjusting information, and a user inputs the brightness adjusting information by adjusting the resistance value of the second adjustable resistor R10. The first processor U2 is implemented by a single chip microcomputer with a model of STC12C5a60S2, and peripheral circuits of the single chip microcomputer, such as a crystal oscillator, are not described herein again. The first connector J1 is a con16 connector, the first connector J1 is correspondingly connected with the first processor U2, when the resistance value of the second adjustable resistor R10 is changed, a corresponding voltage value can be obtained after voltage division, the voltage value is directly transmitted to a P07 port of the single chip microcomputer, after AD conversion is carried out on the single chip microcomputer according to a preset program, the voltage value is output from a fourth pin of the single chip microcomputer, and the output signal is voltage regulation and control information and is used for controlling the switching frequency of the switching tube. The resistance value of the second adjustable resistor R10 is 100K.
Referring to fig. 3, further as a preferred embodiment, the voltage regulating unit further includes a filter circuit 4, and the filter circuit 4 includes a seventh resistor R7, an eighth resistor R8, a second capacitor C2, and a third capacitor C3;
the four pins of the first processor U2 are sequentially grounded through an eighth resistor R8 and a third capacitor C3, the seventh resistor R7 and the second capacitor C2 are connected in series and then connected in parallel with the third capacitor C3, and the connection point of the seventh resistor R7 and the second capacitor C2 is connected with the non-inverting input end of the amplifier U1 through the fifth resistor R5.
The filter circuit 4 is a pi-type filter circuit, the voltage regulation and control information output by the first processor U2 is filtered by the pi-type filter circuit to obtain a stable preset voltage, and the preset voltage is transmitted to the non-inverting input terminal of the amplifier U1, so that the stability of signals is improved.
Referring to fig. 5, further as a preferred embodiment, the current regulation module includes a current output unit and a current regulation unit, the current regulation unit is connected with an emitter of the first NPN bipolar transistor Q1, and the current output unit includes a constant current chip U3, an inductor L1, a diode D1, and a fourth capacitor C4;
a sixth pin of the constant current chip U3 is connected to the current regulating unit, an eighth pin of the constant current chip U3 is connected to an anode of the diode D1 and one end of the inductor L1, respectively, the other end of the inductor L1 is connected to the LED module, a cathode of the diode D1 is connected to the power supply, one end of the fourth capacitor C4 is connected to the power supply, and the other end of the fourth capacitor C4 is grounded.
The constant current chip U3 is realized by a chip with the model number of NCL30160, the direct current output voltage output by the switch type voltage control circuit 1 is input into the current regulation unit, the current regulation unit outputs current regulation information to the constant current chip U3, and the working frequency of the constant current chip U3 is controlled, so that constant direct current is output at the other end of the inductor L1, the current is adopted to drive the LED module, and the brightness of the LED module is regulated.
Referring to fig. 6 and 7, further as a preferred embodiment, the current adjusting unit includes a second processor U4, a second connector J2, a ninth resistor R9 and a third adjustable resistor R11, and the second processor U4 is connected to the second connector J2;
a first end of the third adjustable resistor R11 is connected to an emitter of the first NPN bipolar transistor Q1, a second end of the third adjustable resistor R11 is connected to a first pin of the second connector J2, a third end of the third adjustable resistor R11 is connected to a third pin of the second connector J2, and a fourth pin of the second processor U4 is connected to a sixth pin of the constant current chip U3 through a ninth resistor R9.
The second processor U4 is implemented by a single chip microcomputer with a model of STC12C5a60S2, and peripheral circuits of the single chip microcomputer, such as a crystal oscillator, are not described herein again. After a circuit output by the switch type voltage control circuit 1 is input to a first end of a third adjustable resistor R11, a corresponding voltage sampling value can be obtained after voltage division, the voltage sampling value is directly input to a P07 of a second processor U4, and after AD conversion, a PWMR signal is output at a fourth pin of the second processor U4, and the PWMR signal is used for adjusting the working frequency of a constant current chip U3, so that the output current of a current output unit is adjusted, the output current drives an LED module, and the brightness of the LED module is adjusted.
Referring to fig. 8, further as a preferred embodiment, the voltage regulating unit further includes a key circuit including a switch key S1, a tenth resistor R12, an eleventh resistor R13, and a polar capacitor C5;
the positive electrode of the polar capacitor C5 is connected with a power supply, the negative electrode of the polar capacitor C5 is grounded through an eleventh resistor R13, the switch key S1 and the tenth resistor R12 are connected in series and then connected in parallel with the polar capacitor C5, and the negative electrode of the polar capacitor C5 is connected with the ninth pin of the first processor U2.
In this embodiment, a key circuit is provided, and the key circuit is used to calibrate the conversion coefficient. Specifically, a preset calibration program is stored in the first processor U2 and the second processor U4, and when a user inputs a preset calibration signal through the key circuit, the calibration program is automatically started to complete calibration; this is because different environments or component aging reasons cause the luminance adjustment of the LED to be not linear adjustment, and then corresponding calibration needs to be performed. An implementation of calibration is provided below in connection with the examples.
When the user presses the switch key S1 for 3 consecutive times at 3-second intervals, the first processor U2 and the second processor U4 receive and determine the calibration signal, and then automatically start the calibration procedure. The first step is as follows: the first processor U2 controls the DC output voltage of the voltage output unit to be linearly regulated from the maximum voltage output to the minimum voltage output within 10s through the voltage regulation information; accordingly, in the second processor U4, the output current is linearly adjusted from the maximum current output to the minimum current output within 10s by the current adjustment information, and the first conversion coefficient is calculated and stored. The second step is that: the first processor U2 controls the DC output voltage of the voltage output unit to be linearly regulated from the minimum voltage output to the maximum voltage output within 10s through the voltage regulation information; in the second processor U4, the output current is linearly adjusted from the minimum current output to the maximum current output within 10s by the current adjustment information, and the second conversion coefficient is calculated and stored. And calculating the average value of the first conversion coefficient and the second conversion coefficient, and taking the average value as the final conversion coefficient.
To sum up, the utility model relates to a brightness control system of lamps and lanterns has following beneficial effect:
(1) the direct current voltage of the lamp is linearly adjusted, the direct current is linearly adjusted according to the direct current power supply, and finally the direct current is adopted to drive the LED lamp, so that the brightness of the lamp is linearly adjusted, and the problem that the brightness of the lamp cannot be linearly adjusted is solved.
(2) The LED lamps are driven by the current, so that the brightness of the LED lamps in the lamp is consistent, and the safety of the lamp is improved.
(3) The system is simple in structure, easy to realize, low in implementation cost and capable of being universally adapted to different use environments.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (8)
1. The utility model provides a brightness control system of lamps and lanterns, its characterized in that, includes voltage regulation module, current regulation module and LED module, voltage regulation module includes voltage output unit and voltage regulation unit, voltage output unit includes switch mode voltage control circuit, voltage adjustment comparison circuit and voltage sampling circuit, switch mode voltage control circuit is connected with current regulation module, voltage adjustment comparison circuit and voltage sampling circuit respectively, voltage adjustment comparison circuit is connected with voltage regulation unit and voltage sampling circuit respectively, current regulation module is connected with the LED module.
2. The system of claim 1, wherein the switch-type voltage control circuit comprises a first resistor, a first NPN-type bipolar transistor, and a second NPN-type bipolar transistor;
the collector of the first NPN bipolar transistor is respectively connected with a power supply and one end of a first resistor, the other end of the first resistor is connected with the collector of a second NPN bipolar transistor, the base of the second NPN bipolar transistor is connected with a voltage regulation comparison circuit, the emitter of the second NPN bipolar transistor is connected with the base of the first NPN bipolar transistor, and the emitter of the first NPN bipolar transistor is respectively connected with a voltage sampling circuit and a current regulation module.
3. The system according to claim 2, wherein the voltage sampling circuit comprises a second resistor, a first adjustable resistor and a fourth resistor, a first end of the first adjustable resistor is connected to the emitter of the first NPN bipolar transistor through the second resistor, and a second end of the first adjustable resistor is grounded through the fourth resistor;
the voltage regulation comparison circuit comprises an amplifier, a fifth resistor, a sixth resistor and a first capacitor;
the inverting input end of the amplifier is connected with the third end of the first adjustable resistor, the non-inverting input end of the amplifier is connected with the voltage adjusting unit through the fifth resistor, the output end of the amplifier is connected with the base electrode of the second NPN type bipolar transistor through the sixth resistor, one end of the first capacitor is connected with the inverting input end of the amplifier, and the other end of the first capacitor is connected with the output end of the amplifier.
4. The system of claim 3, wherein the voltage regulating unit comprises a first processor and a voltage regulating circuit, the voltage regulating circuit comprises a first connector and a second adjustable resistor, and the first connector is connected to the first processor;
the first end of the second adjustable resistor is connected with the first pin of the first connector, the second end of the second adjustable resistor is connected with the second pin of the first connector, the third end of the second adjustable resistor is connected with the third pin of the first connector, and the fourth pin of the first processor is connected with the non-inverting input end of the amplifier through a fifth resistor.
5. The system of claim 4, wherein the voltage regulation unit further comprises a filter circuit, and the filter circuit comprises a seventh resistor, an eighth resistor, a second capacitor, and a third capacitor;
the fourth pin of the first processor is grounded with the third capacitor through the eighth resistor in sequence, the seventh resistor and the second capacitor are connected in series and then connected in parallel with the third capacitor, and the connection point of the seventh resistor and the second capacitor is connected with the non-inverting input end of the amplifier through the fifth resistor.
6. The system according to claim 5, wherein the current regulation module comprises a current output unit and a current regulation unit, the current regulation unit is connected with the emitter of the first NPN type bipolar transistor, and the current output unit comprises a constant current chip, an inductor, a diode and a fourth capacitor;
the sixth pin of the constant current chip is connected with the current regulating unit, the eighth pin of the constant current chip is respectively connected with the anode of the diode and one end of the inductor, the other end of the inductor is connected with the LED module, the cathode of the diode is connected with the power supply, one end of the fourth capacitor is connected with the power supply, and the other end of the fourth capacitor is grounded.
7. The system of claim 6, wherein the current adjusting unit comprises a second processor, a second connector, a ninth resistor and a third adjustable resistor, the second processor is connected to the second connector;
the first end of the third adjustable resistor is connected with the emitter of the first NPN bipolar transistor, the second end of the third adjustable resistor is connected with the first pin of the second connector, the third end of the third adjustable resistor is connected with the third pin of the second connector, and the fourth pin of the second processor is connected to the sixth pin of the constant current chip through a ninth resistor.
8. The system of claim 7, wherein the voltage regulation unit further comprises a key circuit, the key circuit comprises a switch key, a tenth resistor, an eleventh resistor and a polar capacitor;
the positive pole of the polar capacitor is connected with a power supply, the negative pole of the polar capacitor is grounded through an eleventh resistor, the switch key and the tenth resistor are connected in series and then connected in parallel with the polar capacitor, and the negative pole of the polar capacitor is connected with a ninth pin of the first processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921178749.XU CN210781438U (en) | 2019-07-24 | 2019-07-24 | Brightness adjusting system of lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921178749.XU CN210781438U (en) | 2019-07-24 | 2019-07-24 | Brightness adjusting system of lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210781438U true CN210781438U (en) | 2020-06-16 |
Family
ID=71040999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921178749.XU Active CN210781438U (en) | 2019-07-24 | 2019-07-24 | Brightness adjusting system of lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210781438U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110351930A (en) * | 2019-07-24 | 2019-10-18 | 广东德洛斯照明工业有限公司 | A kind of brightness control system and method for lamps and lanterns |
-
2019
- 2019-07-24 CN CN201921178749.XU patent/CN210781438U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110351930A (en) * | 2019-07-24 | 2019-10-18 | 广东德洛斯照明工业有限公司 | A kind of brightness control system and method for lamps and lanterns |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103079319B (en) | A kind of Single-wire-system radio-frequency light modulator based on microcontroller | |
| CN110087342B (en) | Pulse frequency modulation heating power regulation control method | |
| CN102833916A (en) | DC (direct current) dimming type LED (Light Emitting Diode) drive circuit | |
| CN210781438U (en) | Brightness adjusting system of lamp | |
| CN202889703U (en) | DC light-modulation type LED drive circuit | |
| WO2018157345A1 (en) | Led lamp and led brightness regulation circuit | |
| CN103841714B (en) | LED dimming driving circuit | |
| CN205093002U (en) | LED drive circuit | |
| CN210666316U (en) | Automatic dimming system and projector with same | |
| CN205029925U (en) | Accurate dimmer circuit of LED wide region | |
| CN218103575U (en) | Dimming system of LED lamp | |
| CN203086814U (en) | Single-wire RF light modulator based on microcontroller | |
| CN105392247A (en) | LED drive circuit | |
| CN209627745U (en) | It is a kind of for LED light source mould group can external dimmer control multifrnction connector | |
| CN211509342U (en) | Trinity dimmer circuit based on MCU | |
| CN110719667B (en) | LED lamp synchronous control device and method | |
| CN110351930A (en) | A kind of brightness control system and method for lamps and lanterns | |
| CN211352545U (en) | Integrated system controlled by communication signal | |
| CN205812472U (en) | A kind of radio-frequency light modulator using single live wire powering mode | |
| CN208364451U (en) | A kind of light-adjusting and speed-adjusting circuit and case fan light-adjusting and speed-adjusting system | |
| CN203261560U (en) | Stroboflash-free circuit | |
| CN105392235A (en) | Intelligent control system with automatic brightness adjustment for LED lamp | |
| CN110856312A (en) | Software-defined digital LED driving power supply | |
| CN219536357U (en) | Loop control circuit and constant current power supply | |
| CN212752674U (en) | A controlling means adjusts luminance for plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |