CN113423157A - Method capable of switching LED power supply dimming control mode - Google Patents
Method capable of switching LED power supply dimming control mode Download PDFInfo
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- CN113423157A CN113423157A CN202110682693.7A CN202110682693A CN113423157A CN 113423157 A CN113423157 A CN 113423157A CN 202110682693 A CN202110682693 A CN 202110682693A CN 113423157 A CN113423157 A CN 113423157A
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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]
- H05B45/30—Driver circuits
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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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- 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]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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Abstract
The invention discloses a method capable of switching LED power supply dimming control modes, and relates to the technical field of LED power supply dimming. The method comprises the steps of supplying power to a power supply driver, enabling a digital control circuit to start working, enabling the digital control circuit to default a dimming control mode to be a control mode of adjusting the output voltage, and judging the dimming control mode once by detecting and identifying the signal state of a dimming control mode switching circuit. The invention provides a method for realizing the dimming control mode of the LED power supply, and the method is characterized in that the PWM dimming control mode and the output voltage regulation voltage value control mode are mutually switched, no stroboflash exists, and the method also has stable dimming accuracy.
Description
Technical Field
The invention belongs to the technical field of LED power supply dimming, and particularly relates to a method capable of switching dimming control modes of an LED power supply.
Background
Electric lamps, i.e., artificial lighting appliances using electricity as an energy source, can convert electricity into light, thereby greatly promoting the progress of human civilization, and common electric lamps include incandescent lamps, fluorescent lamps, LED lamps and the like.
In the field of the existing LED power supply, a PWM dimming mode is a mature dimming technology, the advantages of the PWM dimming mode are very obvious, the PWM dimming mode is combined with a digital control technology, the high dimming control accuracy can be achieved, any color spectrum deviation cannot be generated, the defects exist, the PWM frequency can affect the effect of lamplight, stroboflash can occur due to low frequency, the dimming method is unstable, and the service life of a lamp is shortened due to an improper dimming control mode.
Disclosure of Invention
The invention aims to provide a method for switching a dimming control mode of an LED power supply, and the method for switching the dimming control mode of the LED power supply can help a user to select the most appropriate dimming control mode according to the specific characteristics of a lamp actually used by the user by providing a method for realizing the dimming control mode of the LED power supply, switching between a PWM dimming control mode and a control mode for regulating the voltage value of output voltage without stroboflash and simultaneously having stable dimming accuracy.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a method for switching dimming control modes of an LED power supply comprises the following steps: the scheme I and the scheme II are combined,
the first scheme comprises the following steps:
firstly, supplying power to a power supply driver, starting a digital control circuit to work, wherein the digital control circuit defaults a dimming control mode to a control mode of adjusting the output voltage and a voltage value, and judging the dimming control mode once by detecting and identifying the signal state of a dimming control mode switching circuit;
step two, situation one: when LED power work is adjusting output voltage volt value control mode, LED power work includes when adjusting output voltage volt value control mode: when the dimming brightness changes from 100% brightness to N% brightness and changes from N% brightness to brightness smaller than or equal to 0.01%, the PWM driving signal circuit outputs 100% PWM signals unchanged, the dimming signal acquisition circuit transmits the acquired dimming signals with the brightness changing from N% brightness to brightness smaller than or equal to 0.01% to the digital control circuit, and the digital control circuit receives the dimming signals with the brightness changing from N% brightness to brightness smaller than or equal to 0.01%;
step three, case two: when the LED power supply works in the PWM dimming control mode, the LED power supply works in the PWM dimming control mode and comprises the following steps: when the dimming brightness is changed from 100% brightness to N% brightness, and when the dimming brightness is changed from N% brightness to less than or equal to 0.01% brightness;
step four, when the dimming brightness is changed from 0.01 percent of brightness or darkest brightness to N percent of brightness or brightest brightness, the dimming curves of the step two and the step three in the scheme one are also followed;
and the scheme II comprises the following steps:
step one, supplying power to a power supply driver, starting a digital control circuit to work, and setting a default dimming control mode of the digital control circuit as a control mode of regulating an output voltage volt value;
and step two, during the same power-on holding period, changing the signal state of the dimming control mode switching circuit into a control mode of adjusting the output voltage volt value, and continuously detecting the signal state of the dimming control mode switching circuit as a control mode signal of adjusting the output voltage volt value by the digital control circuit for 10 times.
Optionally, in the first scheme, in the first step, when the signal state of the dimming control mode switching circuit is continuously detected for 10 times as the PWM dimming control mode signal, the digital control circuit switches the dimming control mode to the PWM dimming control mode, otherwise, the digital control circuit keeps the control mode of adjusting the output voltage value unchanged, and after the digital control circuit confirms the dimming control mode, the digital control circuit does not scan and detect the signal state of the dimming control mode switching circuit during the power-on holding period.
Optionally, step two in the first scheme is that: when the LED power supply works in a control mode of adjusting the output voltage volt value, a dimming curve of adjusting the output voltage volt value is followed, at the moment, the PWM driving signal circuit outputs 100% PWM signals, and the brightness of the lamp is adjusted and controlled by the voltage adjusting circuit: the dimming brightness is adjusted to be brightest, the PWM driving signal circuit outputs 100% PWM signals unchanged, the dimming signal acquisition circuit transmits the acquired dimming signals with the brightness of 100% to the digital control circuit, when the digital control circuit receives the dimming signals with the brightness of 100%, the digital control circuit outputs signals, which are only used for the voltage adjusting circuit to identify and adjust the brightness of 100%, to the voltage adjusting circuit, the voltage adjusting circuit outputs voltage adjusting signals with the brightness of 100% to the power supply driver, and the power supply driver drives the lamp to emit light after receiving the voltage adjusting signals with the brightness of 100% output by the voltage adjusting circuit, and adjusts the brightness of the lamp to be brightest.
Optionally, step two in the first scheme is that: when the dimming brightness changes from 100% brightness to N% brightness, the PWM driving signal circuit outputs a 100% PWM signal unchanged, the dimming signal acquisition circuit transmits the acquired dimming signal changing from 100% brightness to N% brightness to the digital control circuit, when the digital control circuit receives the dimming signal changing from 100% brightness to N% brightness, the digital control circuit outputs a signal for regulating the change from 100% brightness to N% brightness, which is only identified by the voltage regulation circuit, to the voltage regulation circuit through calculation processing, the voltage regulation circuit outputs a voltage regulation signal changing from 100% brightness to N% brightness to the power supply driver, and the power supply driver receives the voltage regulation signal changing from 100% brightness to N% brightness and output by the voltage regulation circuit, and then drives the lamp to emit light and regulates the brightness of the lamp from 100% brightness to N% brightness.
Optionally, step two in the first scheme is that: when the dimming brightness changes from N% brightness to less than or equal to 0.01%, a signal which is only identified by the voltage regulating circuit and is adjusted from the N% brightness to less than or equal to 0.01% brightness is output to the voltage regulating circuit through calculation processing, the voltage regulating circuit outputs an adjusting voltage signal which is only identified by the voltage regulating circuit and is adjusted from the N% brightness to less than or equal to 0.01% brightness to the power supply driver, the power supply driver receives the voltage adjusting signal which is output by the voltage regulating circuit and is changed from the N% brightness to less than or equal to 0.01% brightness, then the power supply driver drives the lamp to emit light, and the brightness of the lamp is adjusted from the N% brightness to less than or equal to 0.01% brightness.
Optionally, step three and case two in the scheme one: when the LED power supply works in the PWM dimming control mode, the dimming curve of the PWM dimming control mode is followed, the voltage regulating circuit outputs the voltage signal with the maximum brightness at the moment, and the brightness of the lamp is regulated and controlled by the PWM driving signal circuit: the brightness is adjusted to be brightest, the dimming signal acquisition circuit transmits the acquired dimming signal with 100% brightness to the digital control circuit, the digital control circuit outputs a signal with 100% brightness adjustment to the PWM driving signal circuit after calculation processing when receiving the dimming signal with 100% brightness, the PWM driving signal circuit outputs a PWM adjustment signal with 100% brightness to the power driver, and the power driver drives the lamp to emit light after receiving the PWM adjustment signal with 100% brightness output by the PWM driving signal circuit and adjusts the brightness of the lamp to 100% brightness.
Optionally, step three and case two in the scheme one: when the dimming brightness changes from 100% brightness to N% brightness, the voltage regulating circuit outputs a voltage signal of the maximum brightness, the dimming signal acquisition circuit transmits the acquired dimming signal changing from 100% brightness to N% brightness to the digital control circuit, the digital control circuit outputs a signal of changing and regulating from 100% brightness to N% brightness to the PWM driving signal circuit after calculation processing when receiving the dimming signal changing from 100% brightness to N% brightness, the PWM driving signal circuit outputs a PWM regulating signal changing from 100% brightness to N% brightness to the power driver, and the power driver drives the lamp to emit light after receiving the PWM regulating signal changing from 100% brightness to N% brightness and regulating the brightness of the lamp from 100% brightness to N% brightness.
Optionally, step three and case two in the scheme one: when the dimming brightness changes from N% brightness to less than or equal to 0.01%, the voltage regulating circuit outputs a voltage signal of the maximum brightness, the dimming signal acquisition circuit transmits the acquired dimming signal changing from N% brightness to less than or equal to 0.01% to the digital control circuit, when the digital control circuit receives the dimming signal changing from N% brightness to less than or equal to 0.01% brightness, the digital control circuit outputs a signal of brightness change regulation from N% brightness to less than or equal to 0.01% to the PWM driving signal circuit through calculation processing, the PWM driving signal circuit outputs a PWM regulating signal changing from N% brightness to less than or equal to 0.01% to the power driver, and the power driver receives the PWM regulating signal changing from N% brightness to less than or equal to 0.01% and output by the PWM driving signal circuit, drives the lamp to emit light and regulates the brightness of the lamp from N% brightness to less than or equal to 0.01%.
Optionally, in the second scheme, in the first step, the digital control circuit starts to continuously scan and detect the signal state of the dimming control mode switching circuit, and determines the dimming control mode, at this time, the signal state of the dimming control mode switching circuit is changed into a PWM dimming control mode signal, the digital control circuit continuously detects that the signal state of the dimming control mode switching circuit is the PWM dimming control mode signal for 10 times, the digital control circuit switches the dimming control mode into the PWM dimming control mode, the voltage regulating circuit outputs a voltage signal with maximum brightness, dimming is linearly matched with a dimming curve of the PWM dimming control mode, and the dimming curve follows the dimming curve processes of the second step and the third step.
Optionally, the digital control circuit switches the dimming control mode to the control mode of adjusting the output voltage volt value, the PWM driving signal circuit outputs the PWM signal of the maximum brightness, the dimming linearity matches to the dimming curve of the control mode of adjusting the output voltage volt value, and the dimming curve follows the processes of the second step and the third step until the signal state of the next dimming control mode switching circuit changes.
The embodiment of the invention has the following beneficial effects:
an embodiment of the invention provides a method for realizing the dimming control mode of the LED power supply, and the method is characterized in that the PWM dimming control mode and the output voltage regulation voltage value control mode are mutually switched without stroboflash, and meanwhile, the method has stable dimming accuracy.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic circuit diagram according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
Referring to fig. 1, in the present embodiment, a method for switching a dimming control mode of an LED power supply is provided, including: the scheme I and the scheme II are combined,
the first scheme comprises the following steps:
firstly, supplying power to a power supply driver, starting a digital control circuit to work, wherein the digital control circuit defaults a dimming control mode to a control mode of adjusting the output voltage and a voltage value, and judging the dimming control mode once by detecting and identifying the signal state of a dimming control mode switching circuit;
step two, situation one: when LED power work is adjusting output voltage volt value control mode, LED power work includes when adjusting output voltage volt value control mode: when the dimming brightness changes from 100% brightness to N% brightness and changes from N% brightness to brightness smaller than or equal to 0.01%, the PWM driving signal circuit outputs 100% PWM signals unchanged, the dimming signal acquisition circuit transmits the acquired dimming signals with the brightness changing from N% brightness to brightness smaller than or equal to 0.01% to the digital control circuit, and the digital control circuit receives the dimming signals with the brightness changing from N% brightness to brightness smaller than or equal to 0.01%;
step three, case two: when the LED power supply works in the PWM dimming control mode, the LED power supply works in the PWM dimming control mode and comprises the following steps: when the dimming brightness is changed from 100% brightness to N% brightness, and when the dimming brightness is changed from N% brightness to less than or equal to 0.01% brightness;
step four, when the dimming brightness is changed from 0.01 percent of brightness or darkest brightness to N percent of brightness or brightest brightness, the dimming curves of the step two and the step three in the scheme one are also followed;
and the scheme II comprises the following steps:
step one, supplying power to a power supply driver, starting a digital control circuit to work, and setting a default dimming control mode of the digital control circuit as a control mode of regulating an output voltage volt value;
and step two, during the same power-on holding period, changing the signal state of the dimming control mode switching circuit into a control mode of adjusting the output voltage volt value, and continuously detecting the signal state of the dimming control mode switching circuit as a control mode signal of adjusting the output voltage volt value by the digital control circuit for 10 times.
The application of one aspect of the embodiment is as follows: when the dimming control circuit is used, power is supplied to a power supply driver, the digital control circuit starts to work, the digital control circuit defaults a dimming control mode to be a control mode of adjusting the output voltage value, the digital control circuit starts to continuously scan and detect the signal state of the dimming control mode switching circuit and judges a dimming control mode, at the moment, the signal state of the dimming control mode switching circuit is changed into a PWM dimming control mode signal, the digital control circuit continuously detects that the signal state of the dimming control mode switching circuit is the PWM dimming control mode signal for 10 times, the digital control circuit switches the dimming control mode to the PWM dimming control mode, the voltage regulating circuit outputs a voltage signal with the maximum brightness, and dimming linear matching is performed to be a dimming curve of the PWM dimming control mode. It should be noted that the electric devices referred to in this application may be powered by a storage battery or an external power source.
By providing the dimming control mode for realizing the LED power supply, the method for mutually switching between the PWM dimming control mode and the control mode for adjusting the output voltage and the voltage value has no stroboflash and stable dimming accuracy, and the method for switching the dimming control mode can help a user to select the most appropriate dimming control mode according to the specific characteristics of the lamp used actually, so that the service life of the lamp can be prolonged by the appropriate dimming control mode, and the user can obtain better use experience.
In the first embodiment, in the first step, when the signal state of the dimming control mode switching circuit is continuously detected for 10 times as the PWM dimming control mode signal, the digital control circuit switches the dimming control mode to the PWM dimming control mode, otherwise, the digital control circuit keeps the control mode of adjusting the output voltage value unchanged, and after the digital control circuit confirms the dimming control mode, the digital control circuit does not scan and detect the signal state of the dimming control mode switching circuit during the power-on holding period.
Step two in the first embodiment, case one: when the LED power supply works in a control mode of adjusting the output voltage volt value, a dimming curve of adjusting the output voltage volt value is followed, at the moment, the PWM driving signal circuit outputs 100% PWM signals, and the brightness of the lamp is adjusted and controlled by the voltage adjusting circuit: the dimming brightness is adjusted to be brightest, the PWM driving signal circuit outputs 100% PWM signals unchanged, the dimming signal acquisition circuit transmits the acquired dimming signals with the brightness of 100% to the digital control circuit, when the digital control circuit receives the dimming signals with the brightness of 100%, the digital control circuit outputs signals, which are only used for the voltage adjusting circuit to identify and adjust the brightness of 100%, to the voltage adjusting circuit, the voltage adjusting circuit outputs voltage adjusting signals with the brightness of 100% to the power supply driver, and the power supply driver drives the lamp to emit light after receiving the voltage adjusting signals with the brightness of 100% output by the voltage adjusting circuit, and adjusts the brightness of the lamp to be brightest.
Step two in the first embodiment, case one: when the dimming brightness changes from 100% brightness to N% brightness, the PWM driving signal circuit outputs a 100% PWM signal unchanged, the dimming signal acquisition circuit transmits the acquired dimming signal changing from 100% brightness to N% brightness to the digital control circuit, when the digital control circuit receives the dimming signal changing from 100% brightness to N% brightness, the digital control circuit outputs a signal for regulating the change from 100% brightness to N% brightness, which is only identified by the voltage regulation circuit, to the voltage regulation circuit through calculation processing, the voltage regulation circuit outputs a voltage regulation signal changing from 100% brightness to N% brightness to the power supply driver, and the power supply driver receives the voltage regulation signal changing from 100% brightness to N% brightness and output by the voltage regulation circuit, and then drives the lamp to emit light and regulates the brightness of the lamp from 100% brightness to N% brightness.
Step two in the first embodiment, case one: when the dimming brightness changes from N% brightness to less than or equal to 0.01%, the PWM driving signal circuit outputs a 100% PWM signal, the dimming signal acquisition circuit transmits the acquired dimming signal changing from N% brightness to less than or equal to 0.01% to the digital control circuit, when the digital control circuit receives the dimming signal changing from N% brightness to less than or equal to 0.01% brightness, the digital control circuit outputs a signal which is only identified by the voltage regulation circuit and is changed and regulated from N% brightness to less than or equal to 0.01% brightness to the voltage regulation circuit through calculation processing, the voltage regulation circuit outputs a regulating voltage signal changing from N% brightness to less than or equal to 0.01% brightness to the power supply driver, and the power supply driver receives the voltage regulating signal which is output by the voltage regulation circuit and is changed from N% brightness to less than or equal to 0.01% brightness to drive the lamp to emit light and regulate the brightness of the lamp from N% brightness to less than or equal to 0.01% brightness.
Step three and case two in the first scheme of this embodiment: when the LED power supply works in the PWM dimming control mode, the dimming curve of the PWM dimming control mode is followed, the voltage regulating circuit outputs the voltage signal with the maximum brightness at the moment, and the brightness of the lamp is regulated and controlled by the PWM driving signal circuit: the brightness is adjusted to be brightest, the dimming signal acquisition circuit transmits the acquired dimming signal with 100% brightness to the digital control circuit, the digital control circuit outputs a signal with 100% brightness adjustment to the PWM driving signal circuit after calculation processing when receiving the dimming signal with 100% brightness, the PWM driving signal circuit outputs a PWM adjustment signal with 100% brightness to the power driver, and the power driver drives the lamp to emit light after receiving the PWM adjustment signal with 100% brightness output by the PWM driving signal circuit and adjusts the brightness of the lamp to 100% brightness.
Step three and case two in the first scheme of this embodiment: when the dimming brightness changes from 100% brightness to N% brightness, the voltage regulating circuit outputs a voltage signal of the maximum brightness, the dimming signal acquisition circuit transmits the acquired dimming signal changing from 100% brightness to N% brightness to the digital control circuit, the digital control circuit outputs a signal of changing and regulating from 100% brightness to N% brightness to the PWM driving signal circuit after calculation processing when receiving the dimming signal changing from 100% brightness to N% brightness, the PWM driving signal circuit outputs a PWM regulating signal changing from 100% brightness to N% brightness to the power driver, and the power driver drives the lamp to emit light after receiving the PWM regulating signal changing from 100% brightness to N% brightness and regulating the brightness of the lamp from 100% brightness to N% brightness.
Step three and case two in the first scheme of this embodiment: when the dimming brightness changes from N% brightness to less than or equal to 0.01%, the voltage regulating circuit outputs a voltage signal of the maximum brightness, the dimming signal acquisition circuit transmits the acquired dimming signal changing from N% brightness to less than or equal to 0.01% to the digital control circuit, when the digital control circuit receives the dimming signal changing from N% brightness to less than or equal to 0.01% brightness, the digital control circuit outputs a signal of brightness change regulation from N% brightness to less than or equal to 0.01% to the PWM driving signal circuit through calculation processing, the PWM driving signal circuit outputs a PWM regulating signal changing from N% brightness to less than or equal to 0.01% to the power driver, and the power driver receives the PWM regulating signal changing from N% brightness to less than or equal to 0.01% and output by the PWM driving signal circuit, drives the lamp to emit light and regulates the brightness of the lamp from N% brightness to less than or equal to 0.01%.
In the second embodiment, in the first step, the digital control circuit starts to continuously scan and detect the signal state of the dimming control mode switching circuit, and determines the dimming control mode, at this time, the signal state of the dimming control mode switching circuit is changed to be the PWM dimming control mode signal, the digital control circuit continuously detects that the signal state of the dimming control mode switching circuit is the PWM dimming control mode signal for 10 times, the digital control circuit switches the dimming control mode to be the PWM dimming control mode, the voltage regulating circuit outputs the voltage signal with the maximum brightness, dimming is linearly matched to be the dimming curve of the PWM dimming control mode, and the dimming curve follows the dimming curve processes of the second step and the third step.
In this embodiment, the digital control circuit switches the dimming control mode to the control mode for adjusting the output voltage volt value, the PWM driving signal circuit outputs the PWM signal with the maximum brightness, the dimming linearity is matched to the dimming curve for adjusting the control mode for adjusting the output voltage volt value, and the dimming curve follows the processes of the second step and the third step until the signal state of the next dimming control mode switching circuit changes.
The above embodiments may be combined with each other.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Claims (10)
1. A method for switching a dimming control mode of an LED power supply is characterized by comprising the following steps: the scheme I and the scheme II are combined,
the first scheme comprises the following steps:
firstly, supplying power to a power supply driver, starting a digital control circuit to work, wherein the digital control circuit defaults a dimming control mode to a control mode of adjusting the output voltage and a voltage value, and judging the dimming control mode once by detecting and identifying the signal state of a dimming control mode switching circuit;
step two, situation one: when LED power work is adjusting output voltage volt value control mode, LED power work includes when adjusting output voltage volt value control mode: when the dimming brightness changes from 100% brightness to N% brightness and changes from N% brightness to brightness smaller than or equal to 0.01%, the PWM driving signal circuit outputs 100% PWM signals unchanged, the dimming signal acquisition circuit transmits the acquired dimming signals with the brightness changing from N% brightness to brightness smaller than or equal to 0.01% to the digital control circuit, and the digital control circuit receives the dimming signals with the brightness changing from N% brightness to brightness smaller than or equal to 0.01%;
step three, case two: when the LED power supply works in the PWM dimming control mode, the LED power supply works in the PWM dimming control mode and comprises the following steps: when the dimming brightness is changed from 100% brightness to N% brightness, and when the dimming brightness is changed from N% brightness to less than or equal to 0.01% brightness;
step four, when the dimming brightness is changed from 0.01 percent of brightness or darkest brightness to N percent of brightness or brightest brightness, the dimming curves of the step two and the step three in the scheme one are also followed;
and the scheme II comprises the following steps:
step one, supplying power to a power supply driver, starting a digital control circuit to work, and setting a default dimming control mode of the digital control circuit as a control mode of regulating an output voltage volt value;
and step two, during the same power-on holding period, changing the signal state of the dimming control mode switching circuit into a control mode of adjusting the output voltage volt value, and continuously detecting the signal state of the dimming control mode switching circuit as a control mode signal of adjusting the output voltage volt value by the digital control circuit for 10 times.
2. The method as claimed in claim 1, wherein in the first step of the first scheme, when the signal state of the dimming control mode switching circuit is detected as the PWM dimming control mode signal for 10 consecutive times, the digital control circuit switches the dimming control mode to the PWM dimming control mode, otherwise, the digital control circuit keeps the control mode of adjusting the output voltage volts unchanged, and after the digital control circuit confirms the dimming control mode, the digital control circuit does not scan and detect the signal state of the dimming control mode switching circuit during the power-on holding period.
3. The method of claim 1, wherein step two in scheme one, case one: when the LED power supply works in a control mode of adjusting the output voltage volt value, a dimming curve of adjusting the output voltage volt value is followed, at the moment, the PWM driving signal circuit outputs 100% PWM signals, and the brightness of the lamp is adjusted and controlled by the voltage adjusting circuit: the dimming brightness is adjusted to be brightest, the PWM driving signal circuit outputs 100% PWM signals unchanged, the dimming signal acquisition circuit transmits the acquired dimming signals with the brightness of 100% to the digital control circuit, when the digital control circuit receives the dimming signals with the brightness of 100%, the digital control circuit outputs signals, which are only used for the voltage adjusting circuit to identify and adjust the brightness of 100%, to the voltage adjusting circuit, the voltage adjusting circuit outputs voltage adjusting signals with the brightness of 100% to the power supply driver, and the power supply driver drives the lamp to emit light after receiving the voltage adjusting signals with the brightness of 100% output by the voltage adjusting circuit, and adjusts the brightness of the lamp to be brightest.
4. The method of claim 3, wherein step two in scheme one, case one: when the dimming brightness changes from 100% brightness to N% brightness, the PWM driving signal circuit outputs a 100% PWM signal unchanged, the dimming signal acquisition circuit transmits the acquired dimming signal changing from 100% brightness to N% brightness to the digital control circuit, when the digital control circuit receives the dimming signal changing from 100% brightness to N% brightness, the digital control circuit outputs a signal for regulating the change from 100% brightness to N% brightness, which is only identified by the voltage regulation circuit, to the voltage regulation circuit through calculation processing, the voltage regulation circuit outputs a voltage regulation signal changing from 100% brightness to N% brightness to the power supply driver, and the power supply driver receives the voltage regulation signal changing from 100% brightness to N% brightness and output by the voltage regulation circuit, and then drives the lamp to emit light and regulates the brightness of the lamp from 100% brightness to N% brightness.
5. The method of claim 3, wherein step two in scheme one, case one: when the dimming brightness changes from N% brightness to less than or equal to 0.01%, a signal which is only identified by the voltage regulating circuit and is adjusted from the N% brightness to less than or equal to 0.01% brightness is output to the voltage regulating circuit through calculation processing, the voltage regulating circuit outputs an adjusting voltage signal which is only identified by the voltage regulating circuit and is adjusted from the N% brightness to less than or equal to 0.01% brightness to the power supply driver, the power supply driver receives the voltage adjusting signal which is output by the voltage regulating circuit and is changed from the N% brightness to less than or equal to 0.01% brightness, then the power supply driver drives the lamp to emit light, and the brightness of the lamp is adjusted from the N% brightness to less than or equal to 0.01% brightness.
6. The method of claim 1, wherein the step three and the case two in the first scheme are as follows: when the LED power supply works in the PWM dimming control mode, the dimming curve of the PWM dimming control mode is followed, the voltage regulating circuit outputs the voltage signal with the maximum brightness at the moment, and the brightness of the lamp is regulated and controlled by the PWM driving signal circuit: the brightness is adjusted to be brightest, the dimming signal acquisition circuit transmits the acquired dimming signal with 100% brightness to the digital control circuit, the digital control circuit outputs a signal with 100% brightness adjustment to the PWM driving signal circuit after calculation processing when receiving the dimming signal with 100% brightness, the PWM driving signal circuit outputs a PWM adjustment signal with 100% brightness to the power driver, and the power driver drives the lamp to emit light after receiving the PWM adjustment signal with 100% brightness output by the PWM driving signal circuit and adjusts the brightness of the lamp to 100% brightness.
7. The method of claim 6, wherein the step three and the case two in the first scheme are as follows: when the dimming brightness changes from 100% brightness to N% brightness, the voltage regulating circuit outputs a voltage signal of the maximum brightness, the dimming signal acquisition circuit transmits the acquired dimming signal changing from 100% brightness to N% brightness to the digital control circuit, the digital control circuit outputs a signal of changing and regulating from 100% brightness to N% brightness to the PWM driving signal circuit after calculation processing when receiving the dimming signal changing from 100% brightness to N% brightness, the PWM driving signal circuit outputs a PWM regulating signal changing from 100% brightness to N% brightness to the power driver, and the power driver drives the lamp to emit light after receiving the PWM regulating signal changing from 100% brightness to N% brightness and regulating the brightness of the lamp from 100% brightness to N% brightness.
8. The method of claim 7, wherein the step three and the case two in the first scheme are as follows: when the dimming brightness changes from N% brightness to less than or equal to 0.01%, the voltage regulating circuit outputs a voltage signal of the maximum brightness, the dimming signal acquisition circuit transmits the acquired dimming signal changing from N% brightness to less than or equal to 0.01% to the digital control circuit, when the digital control circuit receives the dimming signal changing from N% brightness to less than or equal to 0.01% brightness, the digital control circuit outputs a signal of brightness change regulation from N% brightness to less than or equal to 0.01% to the PWM driving signal circuit through calculation processing, the PWM driving signal circuit outputs a PWM regulating signal changing from N% brightness to less than or equal to 0.01% to the power driver, and the power driver receives the PWM regulating signal changing from N% brightness to less than or equal to 0.01% and output by the PWM driving signal circuit, drives the lamp to emit light and regulates the brightness of the lamp from N% brightness to less than or equal to 0.01%.
9. The method as claimed in claim 8, wherein in the step one of the second scheme, the digital control circuit starts to continuously scan and detect the signal state of the dimming control mode switching circuit to determine the dimming control mode, and at this time, the signal state of the dimming control mode switching circuit is changed to the PWM dimming control mode signal, and the digital control circuit continuously detects that the signal state of the dimming control mode switching circuit is the PWM dimming control mode signal 10 times, and then the digital control circuit switches the dimming control mode to the PWM dimming control mode, and the voltage regulating circuit outputs the voltage signal with the maximum brightness, and the dimming linearity is matched to the dimming curve of the PWM dimming control mode, and the dimming curve follows the dimming curve procedures of the step two and the step three.
10. The method as claimed in claim 9, wherein the digital control circuit switches the dimming control mode to the control mode of adjusting the output voltage volts, the PWM driving signal circuit outputs the PWM signal with the maximum brightness, the dimming linear matching is the dimming curve of the control mode of adjusting the output voltage volts, and the dimming curve follows the above processes of step two and step three until the signal status of the next dimming control mode switching circuit changes.
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| CN202110682693.7A CN113423157A (en) | 2021-06-21 | 2021-06-21 | Method capable of switching LED power supply dimming control mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115633420A (en) * | 2022-09-30 | 2023-01-20 | 苏州艾微视图像科技有限公司 | Multi-channel adjustable light source control system and control method |
| CN115696673A (en) * | 2022-11-21 | 2023-02-03 | 珠海市圣昌电子有限公司 | Using method of circuit for realizing dual-mode hybrid output of dimming power supply |
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2021
- 2021-06-21 CN CN202110682693.7A patent/CN113423157A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115633420A (en) * | 2022-09-30 | 2023-01-20 | 苏州艾微视图像科技有限公司 | Multi-channel adjustable light source control system and control method |
| CN115633420B (en) * | 2022-09-30 | 2023-09-29 | 苏州艾微视图像科技有限公司 | Multichannel adjustable light source control system and control method |
| CN115696673A (en) * | 2022-11-21 | 2023-02-03 | 珠海市圣昌电子有限公司 | Using method of circuit for realizing dual-mode hybrid output of dimming power supply |
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