Control method of a light group and related components

Abstract

The application discloses a kind of control method of lamp group and related components, applied to dimming field, lamp group includes A lamp;According to the first duty cycle of the PWM signal of the luminance of demand, control A lamp light emitting;Whether the first duty cycle is less than duty cycle threshold value is judged, the PWM signal corresponding to duty cycle threshold value satisfies that lamp does not appear flicker or extinguish;When according to the luminance of actual demand is lower, the first duty cycle is less than duty cycle threshold value, high level time is shorter, and it is easy to cause lamp flicker, when the PWM signal of second duty cycle controls B lamps in lamp group to emit light, second duty cycle is greater than first duty cycle and duty cycle threshold value, can avoid causing lamp flicker, while B lamps reach the luminance of actual demand in a PWM signal cycle, realized normal light emitting function, B lamps are evenly distributed in lamp group, so that light emitting effect is better.

Description

Technical Field

[0001] This invention relates to the field of dimming, and in particular to a method for controlling a lamp assembly and related components. Background Technology

[0002] In existing technologies, the brightness of LED (Light-Emitting Diode) lights is often controlled via PWM (Pulse Width Modulation) signals. Adjusting the high-level duration of the PWM signal adjusts the average current output of the LED driver circuit, resulting in different brightness levels. Typically, LEDs of the same color are controlled by a single PWM signal. When lower brightness is required, a lower duty cycle PWM signal is output, with the high-level duration shorter than the on-time and off-time of the driver circuit, causing the LED to flicker or turn off. Conversely, adjusting the duty cycle to a higher value results in a higher minimum brightness, a smaller adjustable brightness range, and a poor user experience. Summary of the Invention

[0003] The purpose of this invention is to provide a control method and related components for a lamp assembly that can prevent lamp flickering while achieving normal light emission and better light emission effect.

[0004] To solve the above-mentioned technical problems, the present invention provides a control method for a lamp group, wherein the lamp group includes A lamps, where A is a positive integer not less than 2;

[0005] The method includes:

[0006] The first duty cycle of the PWM signal controlling the A lamps to emit light is determined based on the required brightness.

[0007] Determine whether the first duty cycle is less than the duty cycle threshold, and the PWM signal corresponding to the duty cycle threshold satisfies the condition that the lamp does not flicker or turn off;

[0008] If the first duty cycle is less than the duty cycle threshold, a PWM signal with a second duty cycle is output to the drive circuit to control B lamps in the lamp group to emit light, so that B lamps emit light to reach the required brightness within one PWM signal cycle. The second duty cycle is greater than the duty cycle threshold, B is a positive integer less than A, and the B lamps are evenly distributed in the lamp group.

[0009] Preferably, the second duty cycle is determined by the first relationship. Determine, where b is the first duty cycle and c is the second duty cycle.

[0010] Preferably, the values ​​of A and B satisfy the second relation. Where φmin φ is the luminous flux of a single lamp when the duty cycle of the PWM signal is the duty cycle threshold. max This represents the luminous flux of a single lamp when the duty cycle of the PWM signal is 100%.

[0011] Preferably, both lamps A and lamps B are arranged in a centrally symmetrical manner.

[0012] Preferably, the driving circuit controls B lamps and C lamps to emit light respectively, where C = AB;

[0013] After determining whether the first duty cycle is less than the duty cycle threshold, the process further includes:

[0014] If the first duty cycle is not less than the duty cycle threshold, then determine whether the first duty cycle is less than the complementary duty cycle of the duty cycle threshold;

[0015] If the first duty cycle is less than the complementary duty cycle of the duty cycle threshold, then a PWM signal with a third duty cycle is output to the drive circuit to control C of the lamps to emit light, and a complementary PWM signal with a third duty cycle is output to the drive circuit to control B of the lamps to emit light, so that A of the lamps emit light to achieve the required brightness within one PWM signal cycle.

[0016] Preferably, the third duty cycle is expressed by a third relational formula. Determined, where d is the third duty cycle and b is the first duty cycle.

[0017] After determining whether the first duty cycle is less than the duty cycle threshold, the preferred method further includes:

[0018] If the first duty cycle is not less than the duty cycle threshold, a PWM signal with a fourth duty cycle is output to the drive circuit to control C of the lamps to emit light. A PWM signal with a 100% duty cycle is output to the drive circuit to control B of the lamps to emit light, so that A of the lamps emit light to achieve the required brightness within one PWM signal cycle.

[0019] Preferably, the fourth duty cycle is expressed by a fourth relational expression. Determined, where f is the fourth duty cycle and b is the first duty cycle.

[0020] To solve the above-mentioned technical problems, the present invention also provides a control system for a lamp assembly, wherein the lamp assembly includes A lamps, where A is a positive integer not less than 2;

[0021] The system includes:

[0022] The determining unit is used to determine the first duty cycle of the PWM signal that controls the A lamps to emit light based on the required brightness.

[0023] The judgment unit is used to determine whether the first duty cycle is less than the duty cycle threshold, and the PWM signal corresponding to the duty cycle threshold satisfies the condition that the lamp does not flicker or turn off; if so, the output unit is triggered.

[0024] The output unit is used to output a PWM signal with a second duty cycle to the drive circuit to control B lamps in the lamp group to emit light, so that the B lamps emit light to reach the required brightness within one PWM signal cycle. The second duty cycle is greater than the duty cycle threshold, B is a positive integer less than A, and the B lamps are evenly distributed in the lamp group.

[0025] To solve the above-mentioned technical problems, the present invention also provides a control device for a lamp assembly, comprising:

[0026] Memory, used to store computer programs;

[0027] A processor is used to implement the steps of the control method for the above-described lamp group when executing the computer program.

[0028] To address the aforementioned technical problems, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described lamp group control method.

[0029] This application provides a control method and related components for a lamp assembly, applied in the field of dimming. The lamp assembly includes A lamps. A first duty cycle of the PWM signal controlling the A lamps is set according to the actual required brightness. It is determined whether the first duty cycle exceeds a duty cycle threshold. The PWM signal corresponding to the duty cycle threshold ensures that the lamps do not flicker or turn off. When the required brightness is low, the first duty cycle does not exceed the duty cycle threshold, resulting in a lower duty cycle and shorter high-level time for the PWM signal controlling all lamps, which can easily cause flickering. In this case, a second duty cycle PWM signal is used to control B lamps out of the A lamps. The second duty cycle is greater than both the first and the duty cycle threshold, thus avoiding flickering. Simultaneously, B lamps achieve the required brightness within one PWM signal cycle, achieving normal illumination. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A flowchart of a lamp group control method provided by the present invention;

[0032] Figure 2a A schematic diagram of the arrangement of a lamp assembly provided by the present invention;

[0033] Figure 2b This is a schematic diagram of another lamp arrangement provided by the present invention;

[0034] Figure 2c This is a schematic diagram of another lamp arrangement provided by the present invention;

[0035] Figure 3 A schematic diagram of the control system for a lamp assembly provided by the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of a control device for a lamp assembly provided by the present invention. Detailed Implementation

[0037] The core of this invention is to provide a control method and related components for a lamp assembly that can prevent lamp flickering while achieving normal light emission.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In existing technologies, the brightness of LED (Light-Emitting Diode) lights is often controlled via PWM (Pulse Width Modulation) signals. Adjusting the high-level duration of the PWM signal adjusts the average current output of the LED driver circuit, resulting in different brightness levels. Typically, LEDs of the same color are controlled by a single PWM signal. When lower brightness is required, a lower duty cycle PWM signal is output, with the high-level duration shorter than the on-time and off-time of the driver circuit, causing the LED to flicker or turn off. Conversely, adjusting the duty cycle to a higher value results in a higher minimum brightness, a smaller adjustable brightness range, and a poor user experience.

[0040] Figure 1 The flowchart of a control method for a lamp group provided by the present invention is shown. The lamp group includes A lamps, where A is a positive integer not less than 2.

[0041] The methods include:

[0042] S11: Determine the first duty cycle of the PWM signal that controls the illumination of lamp A based on the required brightness;

[0043] The first duty cycle of the PWM signal output to the drive circuit is determined according to the actual brightness requirement. The drive circuit will output current according to the first duty cycle to control the lamp to emit light. The brightness of the A lamps corresponding to the PWM signal of the first duty cycle meets the actual brightness requirement.

[0044] S12: Determine whether the first duty cycle is less than the duty cycle threshold. The PWM signal corresponding to the duty cycle threshold satisfies the condition that the lamp does not flicker or turn off. If so, proceed to step S13.

[0045] Considering that the electronic components in the drive circuit include transistors or MOSFETs, when the PWM signal is transmitted to the drive circuit, these components have on-time and off-time. If the duration of the PWM high level is less than the sum of the on-time and off-time, the lamp will not light up; if the duration of the PWM high level is slightly longer than the sum of the on-time and off-time, the lamp will light up for a shorter time, resulting in flickering. Therefore, a reasonable duty cycle threshold needs to be set. As long as the duty cycle is greater than the threshold, the duration of the high level will be sufficient for the lamp to light up normally without flickering.

[0046] S13: Output a PWM signal with a second duty cycle to the drive circuit to control B lamps in the lamp group to emit light, so that B lamps emit light to reach the required brightness within one PWM signal cycle. The second duty cycle is greater than the duty cycle threshold, B is a positive integer less than A, and B lamps are evenly distributed in the lamp group.

[0047] If the first duty cycle is less than the duty cycle threshold, it means that using the PWM signal output with the first duty cycle to control LED A will cause LED A to turn off or flicker. Therefore, to control LED B of LED A to achieve the same brightness as LED A within one PWM signal cycle, the drive circuit must output a larger current, requiring a larger second duty cycle. To prevent LED B from turning off or flickering, the second duty cycle needs to be greater than the duty cycle threshold.

[0048] Figure 2a A schematic diagram of the arrangement of a lamp assembly provided by the present invention; Figure 2b This is a schematic diagram of another lamp arrangement provided by the present invention; Figure 2c This is a schematic diagram of another lamp arrangement provided by the present invention;

[0049] The B lights are evenly distributed within the light group. If the B lights are not arranged evenly, some areas may be too bright while others are too dark, resulting in a poor user experience. To improve the user experience, evenly distributing the B lights within the light group and selecting only B lights to illuminate will provide a better user experience.

[0050] Figure 2a , Figure 2b and Figure 2c In the diagram, the black circle represents the selected light B.

[0051] It should be noted that the arrangement of the light clusters includes, but is not limited to, the following: Figure 2a , Figure 2b and Figure 2c The method given is not subject to further restrictions in this application.

[0052] It should also be noted that the lights provided in this application include, but are not limited to, LED lights or OLED lights, and may also be other lights controlled by PWM signals. This application does not impose any further limitations on them here.

[0053] This application provides a control method and related components for a lamp assembly, applied in the field of dimming. The lamp assembly includes A lamps. A first duty cycle of the PWM signal controlling the A lamps is set according to the actual required brightness. It is determined whether the first duty cycle exceeds a duty cycle threshold. The PWM signal corresponding to the duty cycle threshold ensures that the lamps do not flicker or turn off. When the required brightness is low, the first duty cycle does not exceed the duty cycle threshold, resulting in a lower duty cycle and shorter high-level time for the PWM signal controlling all lamps, which can easily cause flickering. In this case, a second duty cycle PWM signal is used to control B lamps out of the A lamps. The second duty cycle is greater than both the first and the duty cycle threshold, thus avoiding flickering. Simultaneously, B lamps achieve the required brightness within one PWM signal cycle, achieving normal illumination.

[0054] Based on the above embodiments:

[0055] As a preferred embodiment, the second duty cycle is determined by the first relationship. Determine, where b is the first duty cycle and c is the second duty cycle.

[0056] If we consider the brightness of the lamp and the current output by the driver circuit as having a linear relationship, then the duty cycle is positively correlated with the current output by the driver circuit, and the current is positively correlated with the brightness. Under the same current, the brightness is positively correlated with the number of lamps. Therefore, the product of the second duty cycle c and B should be the product of the first duty cycle b and A. After simplification, we get...

[0057] In a preferred embodiment, the values ​​of A and B satisfy the second relation. Where φ min φ is the luminous flux of a single lamp when the duty cycle of the PWM signal is the duty cycle threshold. max This represents the luminous flux of a single lamp when the duty cycle of the PWM signal is 100%.

[0058] If the number of B lamps is too small, even if the duty cycle of the PWM signal reaches 100%, the current output by the drive circuit will not be able to control the brightness of the B lamps to meet the actual requirements. To avoid this situation, the values ​​of A and B need to satisfy... Under the condition that the second relation is satisfied, the illumination of B lamps can meet the actual brightness requirements to satisfy the user's needs.

[0059] In one preferred embodiment, the driving circuit controls B lamps and C lamps to emit light respectively, where C = AB;

[0060] After determining whether the first duty cycle is less than the duty cycle threshold, the process also includes:

[0061] If the first duty cycle is not less than the duty cycle threshold, then determine whether the first duty cycle is less than the complementary duty cycle of the duty cycle threshold;

[0062] If the first duty cycle is less than the complementary duty cycle of the duty cycle threshold, then the PWM signal of the third duty cycle is output to the drive circuit to control C lamps to light up, and the complementary PWM signal of the third duty cycle is output to the drive circuit to control B lamps to light up, so that A lamps can light up to the required brightness within one PWM signal cycle.

[0063] The A lamps are divided into two groups: one group with B lamps and the other group with C lamps. The driver circuit outputs different currents to control the lamps to light up. If the first duty cycle is not less than the duty cycle threshold 'a', then it is necessary to determine 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 less than (1-a), then PWM signals with different duty cycles need to be output to the drive current to control the two groups of lamps respectively.

[0064] Specifically, a PWM signal with a third duty cycle d is output to the driver circuit, so that the driver circuit outputs the current corresponding to the third duty cycle d to the B lamps to control the lamps to light up. A complementary (1-d) PWM signal with the third duty cycle is output to the driver circuit, so that the driver circuit outputs the current corresponding to (1-d) duty cycles to the C lamps.

[0065] This control method allows lamps B and C to light up independently, achieving the required brightness within one PWM signal cycle.

[0066] After determining whether the first duty cycle is less than the complementary duty cycle of the duty cycle threshold, the process also includes:

[0067] If the first duty cycle is not less than the complementary duty cycle of the duty cycle threshold, then the PWM signal of the first duty cycle is output to the drive circuit to control A lamps to emit light, so that A lamps emit light to achieve the required brightness within one PWM signal cycle.

[0068] If the first duty cycle is not less than the complement (1-a) of the duty cycle threshold, then it proves that the first duty cycle is large at this time, and all the lamps need to be lit to meet the actual brightness requirement. There is no need to control the B lamps and C lamps to emit light at different brightness levels.

[0069] As a preferred embodiment, the third duty cycle is determined by a third relational expression. Determined, where d is the third duty cycle and b is the first duty cycle.

[0070] If we consider the brightness of the lamps and the current output by the drive circuit as having a linear relationship, the duty cycle is positively correlated with the current output by the drive circuit, the current is positively correlated with the brightness, and under the same current, the brightness is positively correlated with the number of lamps. The third duty cycle 'd' controls C lamps to emit light. The complementary (1-d) of the third duty cycle controls B lamps to emit light, resulting in d*C + (1-d)*B = b*(B+C). This equation can be derived as follows:

[0071] As a preferred embodiment, after determining whether the first duty cycle is less than the duty cycle threshold, the method further includes:

[0072] If the first duty cycle is not less than the duty cycle threshold, a PWM signal with the fourth duty cycle is output to the drive circuit to control C lamps to light up, and a PWM signal with a 100% duty cycle is output to the drive circuit to control B lamps to light up, so that A lamps can light up to the required brightness within one PWM signal cycle.

[0073] The above logic divides the first duty cycle into three intervals: [0, a), [a, 1-a), and [1-a, 1]. This may be inconvenient during control. Therefore, this application provides another logic: the first duty cycle is directly divided into two intervals: less than the duty cycle threshold and not less than the duty cycle threshold. If it is not less than the duty cycle threshold, B lights are controlled at 100% duty cycle, and the remaining brightness is supplemented by C lights. If it is less than the duty cycle threshold, the method is the same as above.

[0074] As a preferred embodiment, the fourth duty cycle is determined by the fourth relation. Determined, where f is the fourth duty cycle and b is the first duty cycle.

[0075] Similarly, from f*C+B=b*(B+C), we can derive the following:

[0076] Figure 3 This invention provides a schematic diagram of a control system for a lighting assembly, the system comprising:

[0077] The determining unit 31 is used to determine the first duty cycle of the PWM signal that controls the A lamps to emit light according to the required brightness.

[0078] The judgment unit 32 is used to determine whether the first duty cycle is less than the duty cycle threshold. The PWM signal corresponding to the duty cycle threshold satisfies the condition that the lamp does not flicker or turn off. If yes, the output unit is triggered; if no, the second judgment unit is triggered.

[0079] Output unit 33 is used to output a PWM signal with a second duty cycle to the drive circuit to control B lamps in the lamp group to emit light, so that B lamps emit light to reach the required brightness within one PWM signal cycle. The second duty cycle is greater than the duty cycle threshold, B is a positive integer less than A, and B lamps are evenly distributed in the lamp group.

[0080] The second duty cycle is determined by the first relationship. Determine, where b is the first duty cycle and c is the second duty cycle.

[0081] The values ​​of A and B satisfy the second relation. Where φ min φ is the luminous flux of a single lamp when the duty cycle of the PWM signal is the duty cycle threshold. max This represents the luminous flux of a single lamp when the duty cycle of the PWM signal is 100%.

[0082] The driving circuit controls B lamps and C lamps to light up respectively, where C = AB;

[0083] Also includes:

[0084] The second judgment unit is used to determine whether the first duty cycle is less than the complementary duty cycle of the duty cycle threshold; if yes, the second output unit is triggered; if no, the third output unit is triggered.

[0085] The second output unit is used to output a PWM signal with a third duty cycle to the drive circuit to control C lamps to light up, and to output a complementary PWM signal with a third duty cycle to the drive circuit to control B lamps to light up, so that A lamps can light up to the required brightness within one PWM signal cycle.

[0086] The third duty cycle is determined through the third relational formula. Determined, where d is the third duty cycle and b is the first duty cycle.

[0087] The third output unit is used to output a PWM signal with a fourth duty cycle to the drive circuit to control C lamps to light up, and a PWM signal with a 100% duty cycle to the drive circuit to control B lamps to light up, so that A lamps can light up to the required brightness within one PWM signal cycle.

[0088] The fourth duty cycle is expressed through the fourth relation. Determined, where f is the fourth duty cycle and b is the first duty cycle.

[0089] Figure 4 This is a schematic diagram of a control device for a lamp assembly provided by the present invention. The device includes:

[0090] Memory 41 is used to store computer programs;

[0091] The processor 42 is used to implement the steps of the control method for the above-mentioned lamp group when executing a computer program.

[0092] Please refer to the above embodiments for a description of the control device for the lamp assembly provided in this application, and it will not be repeated here.

[0093] The present invention also provides a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of a control method for an upper light group.

[0094] The description of the computer-readable storage medium provided in this application is given in the above embodiments and will not be repeated here.

[0095] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0096] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0097] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not 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

1. A control method of a lamp group, characterized by, The light group consists of A lights, where A is a positive integer not less than 2; The method includes: The first duty cycle of the PWM signal controlling the A lamps to emit light is determined based on the required brightness. Determine whether the first duty cycle is less than the duty cycle threshold, and the PWM signal corresponding to the duty cycle threshold satisfies the condition that the lamp does not flicker or turn off; If the first duty cycle is less than the duty cycle threshold, a PWM signal with a second duty cycle is output to the drive circuit to control B lamps in the lamp group to emit light, so that B lamps emit light to reach the required brightness within one PWM signal cycle. The second duty cycle is greater than the duty cycle threshold, B is a positive integer less than A, and the B lamps are evenly distributed in the lamp group. The driving circuit controls B lamps and C lamps to emit light respectively, where C=AB; After determining whether the first duty cycle is less than the duty cycle threshold, the process further includes: If the first duty cycle is not less than the duty cycle threshold, then determine whether the first duty cycle is less than the complementary duty cycle of the duty cycle threshold; If the first duty cycle is less than the complementary duty cycle of the duty cycle threshold, then the PWM signal of the third duty cycle is output to the drive circuit to control C of the lamps to light up, and the complementary PWM signal of the third duty cycle is output to the drive circuit to control B of the lamps to light up, so that A of the lamps can light up to the required brightness within one PWM signal cycle. Alternatively, if the first duty cycle is not less than the duty cycle threshold, a PWM signal with a fourth duty cycle is output to the drive circuit to control C of the lamps to emit light, and a PWM signal with a 100% duty cycle is output to the drive circuit to control B of the lamps to emit light, so that A of the lamps emit light to achieve the required brightness within one PWM signal cycle.

2. The control method of a lamp group according to claim 1, characterized in that, The second duty cycle is expressed through the first relationship. Determine, where b is the first duty cycle and c is the second duty cycle.

3. The control method for the lamp assembly as described in claim 1, characterized in that, The values ​​of A and B satisfy the second relation. ,in The luminous flux of a single lamp when the duty cycle of the PWM signal is the duty cycle threshold. This represents the luminous flux of a single lamp when the duty cycle of the PWM signal is 100%.

4. The control method for the lamp assembly as described in claim 1, characterized in that, The third duty cycle is expressed through the third relational formula. Determined, where d is the third duty cycle and b is the first duty cycle.

5. The control method for the lamp assembly as described in claim 1, characterized in that, The fourth duty cycle is expressed through the fourth relation. Determined, where f is the fourth duty cycle and b is the first duty cycle.

6. A control system for a lighting assembly, characterized in that, The light group consists of A lights, where A is a positive integer not less than 2; The system includes: The determining unit is used to determine the first duty cycle of the PWM signal that controls the A lamps to emit light based on the required brightness. The judgment unit is used to determine whether the first duty cycle is less than the duty cycle threshold, and the PWM signal corresponding to the duty cycle threshold satisfies the condition that the lamp does not flicker or turn off; if yes, the output unit is triggered; if no, the second judgment unit or the third output unit is triggered. The output unit is used to output a PWM signal with a second duty cycle to the drive circuit to control B lamps in the lamp group to emit light, so that the B lamps emit light to reach the required brightness within one PWM signal cycle. The second duty cycle is greater than the duty cycle threshold, B is a positive integer less than A, and the B lamps are evenly distributed in the lamp group. The driving circuit is used to control the B lamps and C lamps to emit light respectively, where C=AB; The second determination unit is used to determine whether the first duty cycle is less than the complementary duty cycle of the duty cycle threshold; if so, the second output unit is triggered. The second output unit is used to output a PWM signal with a third duty cycle to the drive circuit to control C lamps to emit light, and to output a complementary PWM signal with a third duty cycle to the drive circuit to control B lamps to emit light, so that A lamps emit light to achieve the required brightness within one PWM signal cycle; The third output unit is used to output a PWM signal with a fourth duty cycle to the drive circuit to control C of the lamps to emit light, and a PWM signal with a 100% duty cycle to the drive circuit to control B of the lamps to emit light, so that A of the lamps emit light to achieve the required brightness within one PWM signal cycle.

7. A control device for a lamp assembly, characterized in that, include: Memory, used to store computer programs; A processor, configured to implement the steps of the control method for the lamp group as claimed in any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the control method for the lamp group as described in any one of claims 1 to 5.

Images