CN111405724A - Dimming parameter online adjusting circuit and dimming method - Google Patents
Dimming parameter online adjusting circuit and dimming method Download PDFInfo
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- CN111405724A CN111405724A CN202010375068.3A CN202010375068A CN111405724A CN 111405724 A CN111405724 A CN 111405724A CN 202010375068 A CN202010375068 A CN 202010375068A CN 111405724 A CN111405724 A CN 111405724A
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Abstract
The invention discloses a dimming parameter online adjusting circuit and a dimming method, and relates to the technical field of switching power supply control circuits. The adjusting circuit comprises a dimming interface circuit and a microprocessor, wherein the input end of the dimming interface circuit is a dimming signal input end, a dimming signal is converted into a corresponding communication signal after being processed by the dimming interface circuit and then is input to the microprocessor for processing, and the microprocessor is used for controlling the main circuit to work according to the processed dimming information, changing the output current of the main circuit, enabling the main circuit to output current according to a preset dimming curve and achieving dimming. The adjusting circuit and the adjusting method can select a proper dimming curve to output according to a terminal application scene when a power supply works in a charged mode, and the power supply requirements of different scenes are met.
Description
Technical Field
The invention relates to the technical field of switching power supply control circuits, in particular to a dimming parameter online adjusting circuit and a dimming method.
Background
The dimming curve is generally divided into a linear curve and a logarithmic curve, wherein the output brightness is linearly related to a dimming signal, and the output brightness is in logarithmic relation to the dimming signal in order to adapt to the sensitivity of human eyes to light.
Disclosure of Invention
The technical problem to be solved by the invention is how to provide a dimming circuit and a dimming method which can select a proper dimming curve at a terminal according to an application scene.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an online adjustment circuit of dimming parameter, its characterized in that: the dimming circuit comprises a dimming interface circuit and a microprocessor, wherein the input end of the dimming interface circuit is a dimming signal input end, a dimming signal is converted into a corresponding communication signal after being processed by the dimming interface circuit and then is input to the microprocessor for processing, and the microprocessor is used for controlling the main circuit to work according to the processed dimming information, changing the output current of the main circuit, enabling the main circuit to output the current according to a preset dimming curve, and realizing dimming.
The further technical scheme is as follows: the adjusting circuit comprises a microprocessor U3, a DIM + is connected with an external 0-10V dimming input signal positive terminal, the DIM + is divided into two paths, the first path is connected with a collector electrode of a triode Q2 through a reverse diode D1, the second path is connected with one end of a resistor R13, an emitter electrode of a triode Q2 is divided into two paths, the first path is connected with an emitter electrode of a triode Q6 through a resistor R23, the second path is connected with a base electrode of a triode Q4, a base electrode of a triode Q2 is divided into two paths, the first path is connected with a collector electrode of a triode Q4, the second path is grounded through a resistor R3, an emitter electrode of a triode Q4 is connected with an emitter electrode of a triode Q6, a collector electrode of a triode Q6 is connected with a power supply VCC, a base electrode of a triode Q6 is divided into three paths, the first path is grounded through a diode ZDS1, the second path is connected with a collector electrode of a, the base electrode of the triode Q1 is connected with the 20 pins of the U3 through a resistor R2; the other end of resistance R13 is divided into five ways, and first way is through resistance R1 ground connection, and second way is ground connection behind electric capacity C6, and ground connection behind reverse diode D2 is crossed to the third way, and the fourth way is connected with the power VCC behind diode D3, the fifth way with U3's 5 feet are connected, U3's 7 feet ground connection, U3's 9 feet divide the text two ways, and first way is through electric capacity C7 ground connection, and the second way is connected with the power VCC, U3's 2 feet do the signal output part of adjusting circuit.
The invention also discloses a dimming parameter online adjusting method, which is characterized by comprising the following steps:
the external dimming device sends a dimming signal to the microprocessor;
the microprocessor receives the dimming signal and performs decoding processing;
judging whether the decoded dimming signal contains the recognizable code or not, and if the dimming signal after decoding processing does not contain the recognizable code, the microprocessor receives the dimming signal again;
if the dimming signal after decoding processing contains the recognizable code, the microprocessor calls the corresponding dimming parameter table according to the recognizable code, and outputs a control signal according to the called dimming parameter table, so that the output current characteristic of the main circuit is changed, and the dimming parameter is adjusted.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the alternating voltage is rectified, converted, adjusted and controlled by the main circuit and then outputs load power supply voltage; the dimming line receives the dimming control signal that the controller sent of adjusting luminance, through inside interface circuit that adjusts luminance, converts corresponding communication signal into, sends main control MCU to, thereby MCU judges through communication signal that the instruction of adjusting luminance changes output current and realizes the function of adjusting luminance, simultaneously, when terminal application, can be when the power live working, through the mode of the signal code of adjusting luminance, nimble change parameter of adjusting luminance satisfies the lighting needs of different scenes.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a functional block diagram of an adjustment circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an adjustment circuit according to an embodiment of the invention;
fig. 3 is a flowchart of an adjusting method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, an embodiment of the present invention discloses an online dimming parameter adjustment circuit, which includes a dimming interface circuit and a microprocessor, wherein an input end of the dimming interface circuit is a dimming signal input end, a dimming signal is processed by the dimming interface circuit and then converted into a corresponding communication signal, which is input to the microprocessor for processing, and the microprocessor is configured to control a main circuit to operate according to processed dimming information, change an output current of the main circuit, and output a current according to a preset dimming curve, so as to implement dimming.
As shown in fig. 2, the adjusting circuit includes a microprocessor U3, a DIM + connected to the positive terminal of the external 0-10V dimming input signal, the DIM + divided into two paths, the first path connected to the collector of a transistor Q2 via a backward diode D1, the second path connected to one end of a resistor R13, the emitter of a transistor Q2 divided into two paths, the first path connected to the emitter of a transistor Q6 via a resistor R23, the second path connected to the base of a transistor Q4, the base of a transistor Q2 divided into two paths, the first path connected to the collector of a transistor Q4, the second path grounded via a resistor R3, the emitter of a transistor Q4 connected to the emitter of a transistor Q6, the collector of a transistor Q6 connected to a power source VCC, the base of a transistor Q6 divided into three paths, the first path grounded via a diode ZDS1, the collector of a second path connected to the collector of a transistor Q1, the third path connected to the power source via a resistor R22, and, the base electrode of the triode Q1 is connected with the 20 pins of the U3 through a resistor R2; the other end of resistance R13 is divided into five ways, and first way is through resistance R1 ground connection, and second way is ground connection behind electric capacity C6, and ground connection behind reverse diode D2 is crossed to the third way, and the fourth way is connected with the power VCC behind diode D3, the fifth way with U3's 5 feet are connected, U3's 7 feet ground connection, U3's 9 feet divide the text two ways, and first way is through electric capacity C7 ground connection, and the second way is connected with the power VCC, U3's 2 feet do the signal output part of adjusting circuit.
As shown in FIG. 2, DIM + is connected to the positive end of the external 0-10V dimming input line, and DIM- (GND) is connected to the negative end of the external 0-10V dimming input line. A diode D1, a triode Q2, a triode Q4, a resistor R23, a resistor R3, a triode Q6, a resistor R22, a diode ZDS1, a triode Q1 and a resistor R2 are used as a power supply circuit of the passive dimmer; the resistor R13, the resistor R1, the capacitor C6, the diode D3 and the diode D2 are used as a dimming signal voltage sampling circuit and output to the single chip microcomputer.
As shown in fig. 3, an embodiment of the present invention further discloses an online dimming parameter adjusting method, which includes the following steps:
the external dimming device sends a dimming signal to the microprocessor;
the microprocessor receives the dimming signal and performs decoding processing;
judging whether the decoded dimming signal contains the recognizable code or not, and if the dimming signal after decoding processing does not contain the recognizable code, the microprocessor receives the dimming signal again;
if the dimming signal after decoding processing contains the recognizable code, the microprocessor calls the corresponding dimming parameter table according to the recognizable code, and outputs a control signal according to the called dimming parameter table, so that the output current characteristic of the main circuit is changed, and the dimming parameter is adjusted.
Specifically, a plurality of 0-10V dimming power supplies are installed in a certain place, and a factory default linear dimming curve is set. The field hopes to realize better dimming effect by changing the logarithmic curve. Therefore, under the condition that the power supply is powered on, the dimming bus can be subjected to open circuit and short circuit operations (such as 5 seconds of open circuit, 2 seconds of short circuit, 1 second of open circuit and 2 seconds of short circuit) according to a certain time sequence, and the single chip microcomputer resets the dimming curve to be a logarithmic curve after receiving the time sequence instruction.
Claims (3)
1. An online adjustment circuit of dimming parameter, its characterized in that: the dimming circuit comprises a dimming interface circuit and a microprocessor, wherein the input end of the dimming interface circuit is a dimming signal input end, a dimming signal is converted into a corresponding communication signal after being processed by the dimming interface circuit and then is input to the microprocessor for processing, and the microprocessor is used for controlling the main circuit to work according to the processed dimming information, changing the output current of the main circuit, enabling the main circuit to output the current according to a preset dimming curve, and realizing dimming.
2. The online dimming parameter adjusting circuit of claim 1, wherein: the adjusting circuit comprises a microprocessor U3, a DIM + is connected with an external 0-10V dimming input signal positive terminal, the DIM + is divided into two paths, the first path is connected with a collector electrode of a triode Q2 through a reverse diode D1, the second path is connected with one end of a resistor R13, an emitter electrode of a triode Q2 is divided into two paths, the first path is connected with an emitter electrode of a triode Q6 through a resistor R23, the second path is connected with a base electrode of a triode Q4, a base electrode of a triode Q2 is divided into two paths, the first path is connected with a collector electrode of a triode Q4, the second path is grounded through a resistor R3, an emitter electrode of a triode Q4 is connected with an emitter electrode of a triode Q6, a collector electrode of a triode Q6 is connected with a power supply VCC, a base electrode of a triode Q6 is divided into three paths, the first path is grounded through a diode ZDS1, the second path is connected with a collector electrode of a, the base electrode of the triode Q1 is connected with the 20 pins of the U3 through a resistor R2; the other end of resistance R13 is divided into five ways, and first way is through resistance R1 ground connection, and second way is ground connection behind electric capacity C6, and ground connection behind reverse diode D2 is crossed to the third way, and the fourth way is connected with the power VCC behind diode D3, the fifth way with U3's 5 feet are connected, U3's 7 feet ground connection, U3's 9 feet divide the text two ways, and first way is through electric capacity C7 ground connection, and the second way is connected with the power VCC, U3's 2 feet do the signal output part of adjusting circuit.
3. A dimming parameter online adjustment method is characterized by comprising the following steps:
the external dimming device sends a dimming signal to the microprocessor;
the microprocessor receives the dimming signal and performs decoding processing;
judging whether the decoded dimming signal contains the recognizable code or not, and if the dimming signal after decoding processing does not contain the recognizable code, the microprocessor receives the dimming signal again;
if the dimming signal after decoding processing contains the recognizable code, the microprocessor calls the corresponding dimming parameter table according to the recognizable code, and outputs a control signal according to the called dimming parameter table, so that the output current characteristic of the main circuit is changed, and the dimming parameter is adjusted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010375068.3A CN111405724A (en) | 2020-05-04 | 2020-05-04 | Dimming parameter online adjusting circuit and dimming method |
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| CN202010375068.3A CN111405724A (en) | 2020-05-04 | 2020-05-04 | Dimming parameter online adjusting circuit and dimming method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112351549A (en) * | 2020-11-24 | 2021-02-09 | 莱昊(上海)光电科技有限公司 | Device and method for carrying out digital communication with LED lamp through 0-10V dimming interface |
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| CN110831275A (en) * | 2019-09-11 | 2020-02-21 | 上海欧切斯智能科技有限公司 | LED drive circuit |
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2020
- 2020-05-04 CN CN202010375068.3A patent/CN111405724A/en active Pending
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| JP2005174725A (en) * | 2003-12-11 | 2005-06-30 | Matsushita Electric Works Ltd | Lighting circuit of light-emitting diode and lighting unit using this and light control system |
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| CN103079313A (en) * | 2012-12-28 | 2013-05-01 | 广州市雷格斯光电科技有限公司 | Multimode dimming and multipath independent constant-current driving circuit for LED (light emitting diode) illumination |
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| CN105163426A (en) * | 2015-08-18 | 2015-12-16 | 上海源明照明科技有限公司 | Programming setting circuit used for setting output parameters of LED driving power supply |
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| CN112351549A (en) * | 2020-11-24 | 2021-02-09 | 莱昊(上海)光电科技有限公司 | Device and method for carrying out digital communication with LED lamp through 0-10V dimming interface |
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Application publication date: 20200710 |