CN116437515A - Control method of lamp set and related assembly - Google Patents
Control method of lamp set and related assembly Download PDFInfo
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- CN116437515A CN116437515A CN202310265477.1A CN202310265477A CN116437515A CN 116437515 A CN116437515 A CN 116437515A CN 202310265477 A CN202310265477 A CN 202310265477A CN 116437515 A CN116437515 A CN 116437515A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000000295 complement effect Effects 0.000 claims description 17
- 238000004590 computer program Methods 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 10
- 230000000875 corresponding effect Effects 0.000 description 9
- 230000002596 correlated effect Effects 0.000 description 6
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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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- 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]
- H05B45/40—Details of LED load 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/155—Coordinated control of two or more light sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention discloses a control method and related components of a lamp group, which are applied to the dimming field, wherein the lamp group comprises A lamps; determining a first duty ratio of a PWM signal for controlling the A lamps to emit light according to the required brightness; judging whether the first duty ratio is smaller than a duty ratio threshold value or not, wherein PWM signals corresponding to the duty ratio threshold value meet the condition that the lamp does not flicker or go out; when the brightness according to actual demands is lower, the first duty ratio is smaller than the duty ratio threshold value, the high level time is shorter, the lamp flickering is easy to occur, at this time, the B lamps in the lamp group are controlled to emit light by PWM signals with the second duty ratio, the second duty ratio is larger than the first duty ratio and the duty ratio threshold value, the lamp flickering is avoided, meanwhile, the B lamps reach the brightness of the actual demands in one PWM signal period, the normal light emitting function is realized, and the B lamps are uniformly distributed in the lamp group, so that the light emitting effect is better.
Description
Technical Field
The present invention relates to the field of dimming, and in particular, to a method for controlling a light fixture and related components.
Background
In the prior art, the brightness of an LED (Light-Emitting Diode) lamp is often controlled by a PWM (Pulse Width Modulation) signal, and the average current output by an LED lamp driving circuit is further adjusted by adjusting the high level time of the PWM signal, so that the LED emits different brightness. Under the general condition, the LED lamps with the same color are controlled by one path of PWM signal, when the required brightness is low, PWM signals with lower duty ratio are output, the time of high level is lower than the on time and the off time of the driving circuit, and the LED lamps can flash or be extinguished. If the duty ratio is adjusted to a higher value, the minimum brightness of the LED lamp is higher, the adjustable brightness interval is smaller, and the user experience is poorer.
Disclosure of Invention
The invention aims to provide a control method of a lamp set and related components, which can avoid lamp flickering, realize normal light-emitting function and have better light-emitting effect.
In order to solve the technical problems, the invention provides a control method of a lamp set, wherein the lamp set comprises A lamps, and A is a positive integer not less than 2;
the method comprises the following steps:
determining a first duty ratio of PWM signals for controlling the light emission of A lamps according to the required brightness;
judging whether the first duty ratio is smaller than a duty ratio threshold value or not, wherein PWM signals corresponding to the duty ratio threshold value meet the condition that the lamp does not flicker or go out;
and if the first duty ratio is smaller than the duty ratio threshold, outputting a PWM signal with a second duty ratio to a driving circuit so as to control B lamps in the lamp group to emit light, so that the B lamps emit light to reach the required brightness in one PWM signal period, wherein the second duty ratio is larger than the duty ratio threshold, B is a positive integer smaller than A, and the B lamps are uniformly distributed in the lamp group.
Preferably, the second duty cycle is determined by a first relation
And determining, wherein b is a first duty cycle, and c is a second duty cycle.
Preferably, the values of A and B satisfy a second relationship
Wherein phi is min Single lamp when the duty cycle of PWM signal is duty cycle thresholdIs phi max Is the luminous flux of a single lamp at a duty cycle of the PWM signal of 100%.
Preferably, the a lamps and the B lamps are arranged in a central symmetry manner.
Preferably, the driving circuit controls the B lamps and the C lamps to emit light, respectively, c=a-B;
after determining whether the first duty cycle is less than the duty cycle threshold, further comprising:
if the first duty cycle is not smaller than the duty cycle threshold, judging whether the first duty cycle is smaller than the complementary duty cycle of the duty cycle threshold;
and if the first duty ratio is smaller than the complementary duty ratio of the duty ratio threshold, outputting a PWM signal with a third duty ratio to the driving circuit so as to control the C lamps to emit light, and outputting the complementary PWM signal with the third duty ratio to the driving circuit so as to control the B lamps to emit light, so that the A lamps emit light to achieve the brightness of actual requirements in one PWM signal period.
Preferably, the third duty cycle is determined by a third relation
And determining, wherein d is the third duty cycle, and b is the first duty cycle.
Preferably, after determining whether the first duty cycle is less than the duty cycle threshold, the method further includes:
if the first duty ratio is not smaller than the duty ratio threshold, outputting a PWM signal with a fourth duty ratio to the driving circuit to control the C lamps to emit light, and outputting a PWM signal with a duty ratio of 100% to the driving circuit to control the B lamps to emit light so that the A lamps emit light to achieve the brightness actually required in one PWM signal period.
Preferably, the fourth duty cycle is determined by a fourth relation
And determining, wherein f is the fourth duty cycle, and b is the first duty cycle.
In order to solve the technical problems, the invention also provides a control system of the lamp group, wherein the lamp group comprises A lamps, and A is a positive integer not less than 2;
the system comprises:
a determining unit for determining a first duty ratio of a PWM signal for controlling the light emission of A lamps according to the required brightness;
the judging unit is used for judging whether the first duty ratio is smaller than a duty ratio threshold value or not, and PWM signals corresponding to the duty ratio threshold value meet the condition that the lamp does not flicker or go out; if yes, triggering an output unit;
the output unit is used for outputting PWM signals with a second duty ratio to the driving circuit so as to control the B lamps in the lamp group to emit light, so that the B lamps emit light to reach the required brightness in one PWM signal period, the second duty ratio is larger than the duty ratio threshold value, B is a positive integer smaller than A, and the B lamps are uniformly distributed in the lamp group.
In order to solve the technical problem, the invention also provides a control device of the lamp set, comprising:
a memory for storing a computer program;
and the processor is used for realizing the steps of the control method of the lamp group when executing the computer program.
To solve the above technical problem, the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the above-mentioned method for controlling a light fixture.
The application provides a control method of a lamp set and related components, which are applied to the dimming field, wherein the lamps comprise A lamps; setting a first duty ratio of PWM signals for controlling the light emission of the A lamps according to the brightness of actual requirements; judging whether the first duty ratio exceeds a duty ratio threshold value or not, wherein PWM signals corresponding to the duty ratio threshold value meet the condition that the lamp does not flicker or go out; when the brightness according to actual demands is lower, the first duty ratio does not exceed the duty ratio threshold value, the duty ratio of PWM signals for controlling all lamps to emit light is lower, the high level time is shorter, the lamps are easy to flash, at the moment, the PWM signals with the second duty ratio are used for controlling the B lamps in the A lamps to emit light, the second duty ratio is larger than the first duty ratio and the duty ratio threshold value, the lamps can be prevented from flashing, meanwhile, the B lamps reach the brightness of the actual demands in one PWM signal period, and the normal light emitting function is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a control method of a lamp set according to the present invention;
FIG. 2a is a schematic diagram illustrating an arrangement of a lamp set according to the present invention;
FIG. 2b is a schematic diagram illustrating another lamp set arrangement according to the present invention;
FIG. 2c is a schematic diagram illustrating another lamp set arrangement according to the present invention;
fig. 3 is a schematic structural diagram of a control system of a light fixture according to the present invention;
fig. 4 is a schematic structural diagram of a control device for a light fixture according to the present invention.
Detailed Description
The core of the invention is to provide a control method of a lamp group and related components, which can avoid flickering of the lamp and realize the function of normal light emission.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the prior art, the brightness of an LED (Light-Emitting Diode) lamp is often controlled by a PWM (Pulse Width Modulation) signal, and the average current output by an LED lamp driving circuit is further adjusted by adjusting the high level time of the PWM signal, so that the LED emits different brightness. Under the general condition, the LED lamps with the same color are controlled by one path of PWM signal, when the required brightness is low, PWM signals with lower duty ratio are output, the time of high level is lower than the on time and the off time of the driving circuit, and the LED lamps can flash or be extinguished. If the duty ratio is adjusted to a higher value, the minimum brightness of the LED lamp is higher, the adjustable brightness interval is smaller, and the user experience is poorer.
FIG. 1 is a flow chart of a control method of a lamp set provided by the invention, wherein the lamps comprise A lamps, and A is a positive integer not less than 2;
the method comprises the following steps:
s11: determining a first duty ratio of a PWM signal for controlling the A lamps to emit light according to the required brightness;
and determining a first duty ratio of the PWM signals output to the driving circuit according to the brightness of the actual demand, wherein the driving circuit outputs current according to the first duty ratio to control the lamps to emit light, and the brightness of the A lamps corresponding to the PWM signals of the first duty ratio meets the brightness of the actual demand.
S12: judging whether the first duty ratio is smaller than a duty ratio threshold value or not, wherein PWM signals corresponding to the duty ratio threshold value meet the condition that the lamp does not flicker or go out; if yes, go to step S13;
considering that the electronic element of the driving circuit comprises a triode or a MOS tube, when the PWM signal is transmitted to the driving circuit, the electronic element has on time and off time, and if the time of the PWM high level is lower than the sum of the on time and the off time, the lamp cannot emit light; if the time of the PWM high level is slightly higher than the sum of the on time and the off time, the lamp will be caused to emit light for a short time, and the effect is to flash. A duty cycle threshold is reasonably set so that the high level time satisfies the normal lighting of the lamp and no flicker occurs as long as the duty cycle is greater than the duty cycle threshold.
S13: and outputting a PWM signal with a second duty ratio to the driving circuit to control the B lamps in the lamp group to emit light so that the B lamps emit light to reach the required brightness in one PWM signal period, wherein the second duty ratio is larger than the duty ratio threshold value, B is a positive integer smaller than A, and the B lamps are uniformly distributed in the lamp group.
If the first duty cycle is less than the duty cycle threshold, it turns out that outputting a PWM signal using the first duty cycle to the driving circuit to control the A lamps to emit light may cause the A lamps to go out or flicker. So, when the B lamps of the a lamps are controlled to emit light, the same brightness as the a lamps is achieved by using the B lamps in one PWM signal period, and the current output by the driving circuit is necessarily required to be larger, the second duty ratio is larger. If it is desired to achieve that B lamps do not appear to extinguish and flicker, then the second duty cycle is required to be greater than the duty cycle threshold.
FIG. 2a is a schematic diagram illustrating an arrangement of a lamp set according to the present invention; FIG. 2b is a schematic diagram illustrating another lamp set arrangement according to the present invention; FIG. 2c is a schematic diagram illustrating another lamp set arrangement according to the present invention;
the B lamps are uniformly distributed in the lamp set, and if the B lamps are not arranged in a uniformly distributed manner, the partial areas may be brighter, and the rest areas are darker, so that the user experience is poor. In order to improve user experience, evenly distributed is in the banks with B lamp, selects B lamp to give out light, can make user experience better.
In fig. 2a, 2B and 2c, black circles are the selected B lamps.
It should be noted that the arrangement of the lamp set includes, but is not limited to, the arrangements shown in fig. 2a, 2b and 2c, and the present application is not limited thereto.
It should be further noted that the lamps provided in the present application include, but are not limited to, LED lamps or OLED lamps, but may be other lamps controlled by PWM signals, and the present application is not limited thereto.
The application provides a control method of a lamp set and related components, which are applied to the dimming field, wherein the lamps comprise A lamps; setting a first duty ratio of PWM signals for controlling the light emission of the A lamps according to the brightness of actual requirements; judging whether the first duty ratio exceeds a duty ratio threshold value or not, wherein PWM signals corresponding to the duty ratio threshold value meet the condition that the lamp does not flicker or go out; when the brightness according to actual demands is lower, the first duty ratio does not exceed the duty ratio threshold value, the duty ratio of PWM signals for controlling all lamps to emit light is lower, the high level time is shorter, the lamps are easy to flash, at the moment, the PWM signals with the second duty ratio are used for controlling the B lamps in the A lamps to emit light, the second duty ratio is larger than the first duty ratio and the duty ratio threshold value, the lamps can be prevented from flashing, meanwhile, the B lamps reach the brightness of the actual demands in one PWM signal period, and the normal light emitting function is realized.
Based on the above embodiments:
as a preferred embodiment, the second duty cycle is determined by the first relation
And determining, wherein b is a first duty cycle, and c is a second duty cycle.
If the brightness of the lamp and the current output by the driving circuit are regarded as linear relation, the duty ratio is positively correlated with the current output by the driving circuit, the current is positively correlated with the brightness, and the brightness is positively correlated with the number of lamps under the same current. So the product of the second duty cycle c and B should be the same as the product of the first duty cycle B and A, and the result is obtained after finishing
As a preferred embodiment, the value of A and the value of B satisfy a second relationship
Wherein phi is min Is the luminous flux of a single lamp when the duty ratio of the PWM signal is the duty ratio threshold value max Is the luminous flux of a single lamp at a duty cycle of the PWM signal of 100%.
If the number of the lamps B is too small, even if the duty ratio of the PWM signal reaches 100%, the current output by the driving circuit cannot control the brightness of the light emitted by the lamps B to reach the brightness actually required. To avoid this, the values of A and B need to be such that
Under the condition that the second relation is satisfied, the brightness of the actual demand can be satisfied by the light emission of the B lamps so as to satisfy the demands of users.
As a preferred embodiment, the driving circuit controls the B lamps and the C lamps to emit light, respectively, c=a-B;
after determining whether the first duty cycle is less than the duty cycle threshold, further comprising:
if the first duty cycle is not less than the duty cycle threshold, judging whether the first duty cycle is less than the complementary duty cycle of the duty cycle threshold;
if the first duty ratio is smaller than the complementary duty ratio of the duty ratio threshold, outputting a PWM signal of a third duty ratio to the driving circuit to control the C lamps to emit light, and outputting the complementary PWM signal of the third duty ratio to the driving circuit to control the B lamps to emit light, so that the A lamps emit light to achieve the brightness actually required in one PWM signal period.
The A lamps are divided into two groups, one group is B lamps, the other group is C lamps, and the driving circuit outputs different currents to control the lamps to emit light respectively. If the first duty cycle is not less than the duty cycle threshold a, then a determination is made as to whether the first duty cycle is less than the complementary duty cycle (1-a) of the duty cycle threshold. If the first duty cycle b is smaller than (1-a), PWM signals respectively having different duty cycles are required to be output to the driving currents to respectively control the two groups of lamps.
Specifically, the PWM signal of the third duty ratio d is output to the driving circuit, so that the driving circuit outputs the current corresponding to the third duty ratio d to the B lamps, and controls the lamps to emit light. And outputting complementary (1-d) PWM signals of the third duty ratio to the driving circuit, so that the driving circuit outputs currents corresponding to the (1-d) duty ratios to the C lamps.
The control method ensures that the B lamps and the C lamps respectively emit light, and the brightness of the actual requirement is achieved in one PWM signal period.
After determining whether the first duty cycle is less than the complementary duty cycle of the duty cycle threshold, further comprising:
if the first duty ratio is not smaller than the complementary duty ratio of the duty ratio threshold, outputting a PWM signal of the first duty ratio to the driving circuit to control the A lamps to emit light, so that the A lamps emit light to achieve the brightness actually required in one PWM signal period.
If the first duty cycle is not less than the complement of the duty cycle threshold (1-a), then it is proved that the first duty cycle is relatively large at this time, and all lamps need to be used to emit light to meet the brightness of the actual requirement, without separately controlling the B lamps and the C lamps to emit light at different brightness.
As a preferred embodiment, the third duty cycle is determined by a third relation
And determining, wherein d is a third duty cycle and b is a first duty cycle.
If the brightness of the lamp and the current output by the driving circuit are regarded as linear relation, the duty ratio is positively correlated with the current output by the driving circuit, the current is positively correlated with the brightness, and the brightness is positively correlated with the number of lamps under the same current. The third duty cycle d controls the C lamps to emit light. The complementary (1-d) control of the third duty cycle to the B lamps gives d+c+ (1-d) b=b+c, and the formula is derived
As a preferred embodiment, after determining whether the first duty cycle is less than the duty cycle threshold, further comprising:
if the first duty ratio is not smaller than the duty ratio threshold, outputting a PWM signal with a fourth duty ratio to the driving circuit to control the C lamps to emit light, and outputting a PWM signal with a duty ratio of 100% to the driving circuit to control the B lamps to emit light so that the A lamps emit light to achieve the brightness of actual requirements in one PWM signal period.
The logic described above divides the first duty cycle into three intervals [0, a ], [ a,1-a ], [1-a,1]. Perhaps less convenient in controlling, and another logic is provided. The first duty cycle is divided directly into two intervals, less than the duty cycle threshold and not less than the duty cycle threshold. If not less than the duty cycle threshold, B or the like is controlled to be at a duty cycle of 100%, and the remaining brightness is supplemented by C lamps. If the duty cycle threshold is less, the method is the same.
As a preferred embodiment, the fourth duty cycle is determined by a fourth relation
And determining, wherein f is a fourth duty cycle, and b is a first duty cycle.
Similarly, from f+c+b=b (b+c) to obtain
Fig. 3 is a schematic structural diagram of a control system of a light fixture according to the present invention, where the system includes:
a determining unit 31 for determining a first duty ratio of a PWM signal for controlling the light emission of the a lamps according to the required brightness;
a judging unit 32, configured to judge whether the first duty ratio is smaller than a duty ratio threshold, where the PWM signal corresponding to the duty ratio threshold satisfies that the lamp does not flicker or go out; if yes, triggering an output unit; if not, triggering a second judging unit;
and an output unit 33, configured to output a PWM signal with a second duty ratio to the driving circuit, so as to control the B lamps in the lamp group to emit light, so that the B lamps emit light to reach the required brightness in one PWM signal period, where the second duty ratio is greater than the duty ratio threshold, B is a positive integer less than a, and the B lamps are uniformly distributed in the lamp group.
The second duty cycle is determined by the first relation
And determining, wherein b is a first duty cycle, and c is a second duty cycle.
The value of A and the value of B satisfy a second relation
Wherein phi is min Is the luminous flux of a single lamp when the duty ratio of the PWM signal is the duty ratio threshold value max Is the luminous flux of a single lamp at a duty cycle of the PWM signal of 100%.
The driving circuit controls the B lamps and the C lamps to emit light respectively, and C=A-B;
further comprises:
a second judging unit for judging whether the first duty cycle is smaller than the complementary duty cycle of the duty cycle threshold; if yes, triggering a second output unit; if not, triggering a third output unit;
the second output unit is used for outputting PWM signals with a third duty ratio to the driving circuit so as to control the C lamps to emit light, and outputting complementary PWM signals with the third duty ratio to the driving circuit so as to control the B lamps to emit light, so that the A lamps emit light to achieve the brightness actually required in one PWM signal period.
The third duty ratio is determined by a third relation
And determining, wherein d is a third duty cycle and b is a first duty cycle.
And the third output unit is used for outputting PWM signals with a fourth duty ratio to the driving circuit so as to control the C lamps to emit light, and controlling the B lamps to emit light by the PWM signals with the duty ratio of 100% to the driving circuit, so that the A lamps emit light to achieve the brightness of actual requirements in one PWM signal period.
The fourth duty cycle is determined by a fourth relation
And determining, wherein f is a fourth duty cycle, and b is a first duty cycle.
Fig. 4 is a schematic structural diagram of a control device for a light fixture according to the present invention, where the device includes:
a memory 41 for storing a computer program;
a processor 42 for implementing the steps of the above-described lamp group control method when executing a computer program.
The description of the control device for the lamp set provided in the present application refers to the above embodiment, and is not repeated here.
The invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor realizes the steps of the control method of the lamp group.
The description of the computer-readable storage medium provided in the present application refers to the above embodiments, and is not repeated herein.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A control method of a lamp set is characterized in that the lamp set comprises A lamps, wherein A is a positive integer not less than 2;
the method comprises the following steps:
determining a first duty ratio of PWM signals for controlling the light emission of A lamps according to the required brightness;
judging whether the first duty ratio is smaller than a duty ratio threshold value or not, wherein PWM signals corresponding to the duty ratio threshold value meet the condition that the lamp does not flicker or go out;
and if the first duty ratio is smaller than the duty ratio threshold, outputting a PWM signal with a second duty ratio to a driving circuit so as to control B lamps in the lamp group to emit light, so that the B lamps emit light to reach the required brightness in one PWM signal period, wherein the second duty ratio is larger than the duty ratio threshold, B is a positive integer smaller than A, and the B lamps are uniformly distributed in the lamp group.
2. The method of controlling a lamp group according to claim 1, wherein the second duty ratio is calculated by a first relation
And determining, wherein b is a first duty cycle, and c is a second duty cycle.
3. The control method of a lamp set according to claim 1, wherein the value of a and the value of B satisfy a second relational expression
Wherein phi is min Is the luminous flux of a single lamp when the duty ratio of the PWM signal is the duty ratio threshold value max Is the luminous flux of a single lamp at a duty cycle of the PWM signal of 100%.
4. A control method of a lamp group according to any one of claims 1 to 3, wherein the driving circuit controls the light emission of B lamps and C lamps, respectively, c=a-B;
after determining whether the first duty cycle is less than the duty cycle threshold, further comprising:
if the first duty cycle is not smaller than the duty cycle threshold, judging whether the first duty cycle is smaller than the complementary duty cycle of the duty cycle threshold;
and if the first duty ratio is smaller than the complementary duty ratio of the duty ratio threshold, outputting a PWM signal with a third duty ratio to the driving circuit so as to control the C lamps to emit light, and outputting the complementary PWM signal with the third duty ratio to the driving circuit so as to control the B lamps to emit light, so that the A lamps emit light to achieve the brightness of actual requirements in one PWM signal period.
5. The method of controlling a lamp unit according to claim 4, wherein the third duty ratio is calculated by a third relation
And determining, wherein d is the third duty cycle, and b is the first duty cycle.
6. A control method of a lamp group according to any one of claims 1 to 3, further comprising, after determining whether the first duty ratio is smaller than a duty ratio threshold value:
if the first duty ratio is not smaller than the duty ratio threshold, outputting a PWM signal with a fourth duty ratio to the driving circuit to control the C lamps to emit light, and outputting a PWM signal with a duty ratio of 100% to the driving circuit to control the B lamps to emit light so that the A lamps emit light to achieve the brightness actually required in one PWM signal period.
7. The control method of a lamp set according to claim 6, wherein the fourth duty ratio is calculated by a fourth relational expression
And determining, wherein f is the fourth duty cycle, and b is the first duty cycle.
8. A control system of a lamp group is characterized in that the lamp group comprises A lamps, wherein A is a positive integer not less than 2;
the system comprises:
a determining unit for determining a first duty ratio of a PWM signal for controlling the light emission of A lamps according to the required brightness;
the judging unit is used for judging whether the first duty ratio is smaller than a duty ratio threshold value or not, and PWM signals corresponding to the duty ratio threshold value meet the condition that the lamp does not flicker or go out; if yes, triggering an output unit;
the output unit is used for outputting PWM signals with a second duty ratio to the driving circuit so as to control the B lamps in the lamp group to emit light, so that the B lamps emit light to reach the required brightness in one PWM signal period, the second duty ratio is larger than the duty ratio threshold value, B is a positive integer smaller than A, and the B lamps are uniformly distributed in the lamp group.
9. A control device for a lamp group, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method of controlling a lamp set according to any one of claims 1 to 7 when executing said computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method of controlling a lamp set according to any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310265477.1A CN116437515A (en) | 2023-03-13 | 2023-03-13 | Control method of lamp set and related assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310265477.1A CN116437515A (en) | 2023-03-13 | 2023-03-13 | Control method of lamp set and related assembly |
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| Publication Number | Publication Date |
|---|---|
| CN116437515A true CN116437515A (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310265477.1A Pending CN116437515A (en) | 2023-03-13 | 2023-03-13 | Control method of lamp set and related assembly |
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| Country | Link |
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| CN (1) | CN116437515A (en) |
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- 2023-03-13 CN CN202310265477.1A patent/CN116437515A/en active Pending
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