Lighting method of LED lamp and related device

Abstract

The application provides a dimming method and related device of an LED lamp. The method comprises: obtaining a current gray scale given value of the LED lamp; reducing a maximum output current threshold based on the current gray scale given value, increasing the current gray scale given value, so that the current actual output current calculated based on the current gray scale given value before and after adjustment remains unchanged; and the reduced maximum output current threshold is greater than or equal to the current actual output current; and performing dimming control on the LED lamp based on the current actual output current and the adjusted current gray scale given value. The above method can improve the gray scale value without changing the actual output current, thereby avoiding the problem of light flickering caused by low gray scale value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED, in particular to a dimming method of LED lamp and related device. BACKGROUND

[0002] LED (Light-Emitting Diode) has the advantages of energy saving, low power consumption, long service life, etc., and is widely used in lighting, display, brightening and other equipment. The LED driving technology is mainly the PWM (Pulse Width Modulation) mode with constant current amplitude. The gray data for adjusting the brightness of the LED is used to generate the corresponding PWM duty cycle to adjust the on-off degree of the LED.

[0003] However, the analog dimming method is prone to light jitter during dimming, especially in low brightness conditions. SUMMARY

[0004] The present application provides a dimming method of LED lamp and related device to solve the problem of light jitter in low brightness conditions in the prior art.

[0005] In a first aspect, the present application provides a dimming method of LED lamp, comprising:

[0006] obtaining a current gray given value of the LED lamp;

[0007] decreasing the maximum output current threshold based on the current gray given value and increasing the current gray given value, so that the current actual output current calculated based on the current gray given value before and after adjustment remains unchanged; and the decreased maximum output current threshold is greater than or equal to the current actual output current;

[0008] based on the current actual output current and the adjusted current gray given value, performing dimming control on the LED lamp.

[0009] In a second aspect, the present application provides a dimming device of LED lamp, comprising:

[0010] a current gray given value obtaining module configured to obtain a current gray given value of the LED lamp;

[0011] a current gray given value adjusting module configured to decrease the maximum output current threshold based on the current gray given value and increase the current gray given value, so that the current actual output current calculated based on the current gray given value before and after adjustment remains unchanged; and the decreased maximum output current threshold is greater than or equal to the current actual output current;

[0012] The dimming module is used for dimming control of the LED lamp based on the current actual output current and the adjusted current gray given value.

[0013] In a third aspect, an embodiment of the present application provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method according to any possible implementation manner of the first aspect.

[0014] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement the steps of the method according to any possible implementation manner of the first aspect.

[0015] The embodiment of the present application provides a dimming method of an LED lamp and a related device. The method first acquires a current gray given value of the LED lamp. Then, a maximum output current threshold is reduced based on the current gray given value, and the current gray given value is increased, so that a current actual output current calculated based on the current gray given value before and after adjustment remains unchanged. The maximum output current threshold after reduction is greater than or equal to the current actual output current. Finally, the LED lamp is dimmed based on the current actual output current and the adjusted current gray given value. The above method can improve the gray value without changing the actual output current, and avoid the problem of light flickering caused by a low gray value. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is an application scenario diagram of the dimming method of the LED lamp provided by the embodiment of the present application;

[0018] Figure 2 is a flowchart of the dimming method of the LED lamp provided by the embodiment of the present application;

[0019] Figure 3 is a structural schematic diagram of the dimming device of the LED lamp provided by the embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the terminal provided by the embodiment of the present application. DETAILED DESCRIPTION

[0021] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0022] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be described in conjunction with the specific embodiments and the accompanying drawings.

[0023] Figure 1 The application scenario diagram of the dimming method of the LED lamp provided by the embodiments of the present application is shown in FIG. 1. Figure 1 As shown in FIG. 1, the LED lamp includes a rectifier circuit, a constant voltage control circuit, an auxiliary power supply circuit, a control module and a dimming control circuit.

[0024] The dimming control circuit is specifically an LED dimming and color control circuit; the rectifier circuit converts the mains into direct current and delivers the direct current to the constant voltage control circuit, the constant voltage control circuit provides constant voltage for the LED dimming and color control circuit and the auxiliary power supply circuit, the auxiliary power supply circuit is used for supplying power to the control module, the control module is used for generating a current actual output current based on a current gray scale setting value of the LED lamp, and sending the current actual output current and the current gray scale setting value to the LED dimming and color control circuit through an I2C (Inter-Integrated-Circuit Bus) bus, and the LED dimming and color control circuit controls at least one lamp string to emit light according to the current actual output current and the current gray scale setting value. The LED dimming and color control circuit includes an IC (Integrated Circuit) chip.

[0025] Referring to Figure 2 FIG. 2 shows an implementation flowchart of the dimming method of the LED lamp provided by the embodiments of the present application, which is described in detail as follows.

[0026] S101: Obtain a current gray scale setting value of the LED lamp.

[0027] The execution subject of the present embodiment is the control module.

[0028] In the present embodiment, the LED lamp can include at least one group of lamp strings. The user can set the gray scale values of the groups of lamp strings to dim the LED lamp. Each lamp string supports 1024 gray scale dimming. The current gray scale setting value can be a value set by the user on a control panel or other user interaction module.

[0029] S102: decrease the maximum output current threshold based on the current gray scale given value, increase the current gray scale given value, so that the current actual output current calculated based on the current gray scale given value before and after adjustment remains unchanged; and the maximum output current threshold after reduction is greater than or equal to the current actual output current.

[0030] In the prior art, after obtaining the current gray scale given value, the actual output current is determined by the analog dimming method, and then the corresponding actual output current is provided to the corresponding lamp string to control the corresponding lamp string to emit corresponding brightness. In the analog dimming algorithm, the formula for calculating the actual output current is:

[0031]

[0032] wherein, I Out represents the current actual output current, I OutMaxSetting represents the factory maximum output current threshold; Greyscale represents the current gray scale given value, Greyscale Max represents the maximum gray scale value; Greyscale New represents the updated current gray scale given value.

[0033] wherein, I OutMaxSetting includes multiple gears, and the factory maximum output current threshold corresponding to each lamp string channel can be determined according to the IC specification book and hardware requirements, which is usually fixed; therefore, in the prior art, the current gray scale given value determines the size of the current actual output current.

[0034] Since the reference voltage of the corresponding device in the LED dimming and color control circuit is small when the gray scale value is small, the control of some devices is unstable, which leads to the problem of lamp string flickering. In order to avoid the problem of lamp string flickering, the maximum output current threshold in the above formula is reduced to increase the current gray scale given value, so as to avoid sending small gray scale values to the LED dimming and color control circuit, and ensure stable light emission.

[0035] In one possible implementation, the specific implementation process of S102 includes:

[0036] S201: according to the formula to obtain the maximum output current threshold after reduction;

[0037] S202: determine the adjusted current gray scale given value based on the formula

[0038] wherein, I OutMax represents the maximum output current threshold after reduction, I OutMaxSetting ​represents the factory maximum output current threshold; Greyscale represents the current grey scale given value, Greyscale Max represents the maximum grey scale value; Greyscale New represents the updated current grey scale given value.

[0039] In one possible implementation, before S202, the method provided by the embodiment further includes:

[0040] rounding up the reduced maximum output current threshold to obtain the latest maximum output current threshold.

[0041] In the embodiment, in order to avoid the grey scale value increasing too much beyond the maximum grey scale value, after the reduced maximum output current threshold is calculated, the embodiment judges whether the reduced maximum output current threshold is greater than or equal to the current actual current output threshold. If yes, the reduced maximum output current threshold is rounded up to obtain the latest maximum output current threshold, and finally the latest maximum output current threshold is input into the formula in S202 to determine the adjusted current grey scale given value.

[0042] The above method can not only ensure the increase of the current grey scale given value, but also make the updated maximum output current threshold meet the requirements of the IC specification, and avoid the current grey scale given value exceeding the maximum grey scale value.

[0043] In one possible implementation, before S202, another method provided by the embodiment further includes:

[0044] rounding up the reduced maximum output current threshold to obtain the latest maximum output current threshold.

[0045] In the embodiment, the maximum output current threshold of different gears in the IC specification is usually spaced by a first value. In order to avoid the maximum output current threshold being too small, the reduced maximum output current threshold is rounded up to the nearest multiple of the first value to obtain the latest maximum output current threshold, for example, the reduced maximum output current threshold is 22.6 mA, and the first value is 5, so the reduced maximum output current threshold is rounded up to the nearest multiple of 5, which is 25 mA. This method can not only avoid the current grey scale given value exceeding the maximum grey scale value, but also meet the requirements of the IC specification.

[0046] In one possible implementation, before S202, still another method provided by the embodiment includes:

[0047] rounding up the reduced maximum output current threshold to obtain the latest maximum output current threshold;

[0048] If the latest maximum output current threshold is less than the current actual output current, the reduced maximum output current threshold is rounded up to the nearest multiple of the first number to obtain the latest maximum output current threshold.

[0049] The above method can increase the maximum output current threshold, avoid the current actual output current exceeding the updated maximum output current threshold, and make the updated maximum output current threshold meet the IC specification.

[0050] In one possible implementation, before S102, the method provided in the embodiment further includes:

[0051] If the current gray scale given value is less than the preset gray scale given value, the maximum output current threshold is reduced based on the current gray scale given value, and the current gray scale given value is increased.

[0052] Specifically, in order to save the calculation amount and avoid the adjustment amplitude being too large, the embodiment only adjusts the current gray scale given value less than the preset gray scale given value, and if the current gray scale given value is not less than the preset gray scale given value, the original formula is still used. The current actual output current is determined.

[0053] In one possible implementation, the LED lamp includes a plurality of lamp strings, and the specific implementation process of S102 includes:

[0054] The maximum value of the current gray scale given value corresponding to each lamp string channel is selected.

[0055] The maximum output current threshold is reduced based on the maximum value, and the current gray scale given value is increased, so that the current actual output current calculated based on the current gray scale given value before and after the adjustment remains unchanged.

[0056] In the embodiment, some LED dimming and color control circuits support setting the maximum output current threshold for each lamp string channel individually, in which case, after obtaining the current gray scale given value corresponding to each lamp string channel, the method of S101 to S102 can obtain the updated current gray scale given value and the current actual output current corresponding to each lamp string channel. However, some LED dimming and color control circuits do not support setting the maximum output current threshold for each lamp string channel individually, that is, the maximum output current thresholds of the multiple lamp strings are consistent. At this time, in order to improve the gray scale value of all lamp strings, after obtaining the current gray scale given value of each lamp string channel, the maximum current gray scale given value among the current gray scale given values of each lamp string channel is selected to participate in the subsequent calculation of S102, and the updated current gray scale given value and the current actual output current obtained are respectively given to each channel, so as to meet the output current demand of each channel and improve the gray scale value demand.

[0057] S103: Perform dimming control on the LED lamp based on the current actual output current and the adjusted current grayscale given value.

[0058] In the embodiment, after the current actual output current and the adjusted current grayscale given value of each channel are acquired, the current actual output current and the adjusted current grayscale given value are sent to the LED dimming and color control circuit through an I2C bus, so that the LED dimming and color control circuit controls the corresponding lamp string to work according to the current actual output current and the adjusted current grayscale given value of each channel.

[0059] As can be seen from the above embodiment, the fixed maximum output current threshold is cancelled, and the maximum output current threshold is dynamically adjusted according to the maximum output current threshold and the current grayscale given value. Under the premise of keeping the same current output, the current grayscale given value is increased by reducing the maximum output current threshold. Thus, when the current output is small, a smaller maximum output current threshold and a larger grayscale value are used to control the lamp string, thereby avoiding the problem of low brightness flicker of the lamp string.

[0060] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0061] The following is a device embodiment of the present application. For details not described in detail, reference can be made to the corresponding method embodiments described above.

[0062] Figure 4 A structure diagram of a dimming device of an LED lamp provided by an embodiment of the present application is shown. For ease of illustration, only parts related to the embodiment of the present application are shown, and are described in detail as follows.

[0063] As shown in Figure 4 The dimming device 100 of the LED lamp includes:

[0064] A current grayscale given value acquisition module 110 is configured to acquire a current grayscale given value of the LED lamp.

[0065] A current grayscale given value adjustment module 120 is configured to reduce the maximum output current threshold based on the current grayscale given value, and increase the current grayscale given value, so that the current actual output current calculated based on the current grayscale given value before and after adjustment remains unchanged; and the reduced maximum output current threshold is greater than or equal to the current actual output current.

[0066] A dimming module 130 is configured to perform dimming control on the LED lamp based on the current actual output current and the adjusted current grayscale given value.

[0067] In a possible implementation, the current gray scale given value adjustment module 120 comprises:

[0068] a maximum output current threshold value reduction unit, configured to obtain a reduced maximum output current threshold value according to a formula

[0069] a current gray scale given value increase unit, configured to determine an adjusted current gray scale given value based on a formula

[0070] wherein I OutMax represents the reduced maximum output current threshold value, I OutMaxSetting represents a factory maximum output current threshold value; Greyscale represents the current gray scale given value, Greyscale Max represents a maximum gray scale value; Greyscale New represents an updated current gray scale given value.

[0071] In a possible implementation, the current gray scale given value adjustment module 120 further comprises a first maximum output current threshold value correction unit, configured to:

[0072] round up the reduced maximum output current threshold value to obtain a latest maximum output current threshold value.

[0073] In a possible implementation, the current gray scale given value adjustment module 120 further comprises a second maximum output current threshold value correction unit, configured to:

[0074] round up the reduced maximum output current threshold value to the nearest multiple of a first value to obtain a latest maximum output current threshold value.

[0075] In a possible implementation, the dimming device 100 of the LED lamp further comprises a judgment module, configured to:

[0076] if the current gray scale given value is less than a preset gray scale given value, reduce the maximum output current threshold value based on the current gray scale given value and increase the current gray scale given value.

[0077] In a possible implementation, the LED lamp comprises a plurality of lamp strings; and the current gray scale given value adjustment module 120 comprises:

[0078] select a maximum value of the current gray scale given values corresponding to the lamp string channels;

[0079] reduce the maximum output current threshold value based on the maximum value and increase the current gray scale given value, so that the current actual output current calculated based on the current gray scale given values before and after adjustment remains unchanged.

[0080] ​​As can be seen from the above embodiments, this embodiment eliminates the fixed maximum output current threshold and dynamically adjusts the maximum output current threshold based on the maximum output current threshold and the current grayscale setpoint. While maintaining the same current output, the current grayscale setpoint is increased by decreasing the maximum output current threshold. Therefore, when the current output is low, a smaller maximum output current threshold and a larger grayscale value are used to control the LED string, avoiding the problem of low-brightness flickering in the LED string.

[0081] Figure 4 This is a schematic diagram of a terminal provided in an embodiment of the present invention. Figure 4 As shown, the terminal 4 in this embodiment includes a processor 40 and a memory 41. The memory 41 stores a computer program 42, and the processor 40 calls and runs the computer program 42 stored in the memory 41 to execute the steps in the dimming method embodiments of the various LED lamps described above, for example... Figure 2 The steps S101 to S103 are shown. Alternatively, the processor 40 is used to call and run the computer program 42 stored in the memory 41 to implement the functions of each module / unit in the above-described device embodiments, for example... Figure 3 The functions of modules 110 to 130 are shown.

[0082] For example, the computer program 42 can be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 42 in the terminal 4. For example, the computer program 42 can be divided into... Figure 3 Modules 110 to 130 are shown.

[0083] The terminal 4 can be a computing device such as a desktop computer, laptop, handheld computer, or cloud server. The terminal 4 may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will understand that... Figure 4 This is merely an example of terminal 4 and does not constitute a limitation on terminal 4. It may include more or fewer components than shown, or combine certain components, or different components. For example, the terminal may also include input / output devices, network access devices, buses, etc.

[0084] The processor 40 can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0085] The memory 41 can be an internal storage unit of the terminal 4, such as a hard disk or a memory of the terminal 4. The memory 41 can also be an external storage device of the terminal 4, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 41 can also include both the internal storage unit and the external storage device of the terminal 4. The memory 41 is used to store the computer program and other programs and data required by the terminal. The memory 41 can also be used to temporarily store data that has been output or is to be output.

[0086] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to complete all or part of the above described functions. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit, and the integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0087] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can refer to the relevant description of other embodiments.

[0088] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized 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 implementation should not be considered beyond the scope of the present application.

[0089] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / terminal and method can be implemented in other ways. For example, the apparatus / terminal embodiments described above are merely schematic. The division of the modules or units is merely a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection between the units can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or in other forms.

[0090] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0091] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0092] The integrated module / unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned LED lamp dimming method embodiments can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, an executable file, or some intermediate form, etc. The computer-readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the contents included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0093] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method of dimming an LED luminaire, the method comprising: The method comprises: obtaining a current gray scale given value of an LED lamp; decreasing a maximum output current threshold based on the current gray scale given value and increasing the current gray scale given value so that a current actual output current calculated based on the current gray scale given value before and after the adjustment remains unchanged; and the decreased maximum output current threshold is greater than or equal to the current actual output current; performing dimming control on the LED lamp based on the current actual output current and the adjusted current gray scale given value; the decreasing of the maximum output current threshold based on the current gray scale given value and the increasing of the current gray scale given value so that the current actual output current calculated based on the current gray scale given value before and after the adjustment remains unchanged comprises: According to the formula a reduced maximum output current threshold is obtained; Based on the formula determining an adjusted current gray scale given value; wherein I OutMax represents the reduced maximum output current threshold, I OutMaxSetting represents the factory maximum output current threshold; Greyscale represents the current grey scale given value, Greyscale Max represents the maximum grey scale value; Greyscale New represents the updated current grey scale given value.

2. The method of Claim 1, wherein, In the formula-based adjustment Before determining the adjusted current gray scale given value, the method further comprises: taking the decreased maximum output current threshold to the nearest first number of multiples to obtain a latest maximum output current threshold.

3. The method of Claim 1, wherein, In the formula-based adjustment Before determining the adjusted current gray scale given value, the method further comprises: the decreasing of the maximum output current threshold based on the current gray scale given value and the increasing of the current gray scale given value so that the current actual output current calculated based on the current gray scale given value before and after the adjustment remains unchanged comprises:

4. The method of Claim 1, wherein, before the decreasing of the maximum output current threshold based on the current gray scale given value and the increasing of the current gray scale given value, the method further comprises: if the current gray scale given value is less than a preset gray scale given value, decreasing the maximum output current threshold based on the current gray scale given value and increasing the current gray scale given value.

5. The method of Claim 1, wherein, the LED lamp comprises a plurality of lamp strings; the decreasing of the maximum output current threshold based on the current gray scale given value and the increasing of the current gray scale given value so that the current actual output current calculated based on the current gray scale given value before and after the adjustment remains unchanged comprises: selecting a maximum value of the current gray scale given value corresponding to each lamp string channel; decreasing the maximum output current threshold based on the maximum value and increasing the current gray scale given value so that the current actual output current calculated based on the current gray scale given value before and after the adjustment remains unchanged.

6. A dimming device for an LED luminaire, characterized in that The method comprises: a current gray scale given value obtaining module configured to obtain a current gray scale given value of an LED lamp; a current gray scale given value adjusting module configured to decrease a maximum output current threshold based on the current gray scale given value and increase the current gray scale given value so that a current actual output current calculated based on the current gray scale given value before and after the adjustment remains unchanged; and the decreased maximum output current threshold is greater than or equal to the current actual output current; a dimming module configured to perform dimming control on the LED lamp based on the current actual output current and the adjusted current gray scale given value; the current gray scale given value adjusting module comprises: a maximum output current threshold reduction unit configured to obtain a reduced maximum output current threshold according to the formula a maximum output current threshold reduction unit configured to obtain a reduced maximum output current threshold according to the formula The current gray scale given value increasing unit is configured to determine an adjusted current gray scale given value based on a formula determined by the current gray scale given value increasing unit. wherein I OutMax represents the reduced maximum output current threshold, I OutMaxSetting represents the factory maximum output current threshold; Greyscale represents the current grey scale given value, Greyscale Max represents the maximum grey scale value; Greyscale New represents the updated current grey scale given value.

7. A controller characterized by comprising: a controller comprising a processor and a memory, the memory being configured to store a computer program, and the processor being configured to call and run the computer program stored in the memory to execute the dimming method of the LED lamp according to any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, the computer-readable storage medium comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 7. The computer program is executed by the processor to implement the steps of the dimming method of the LED lamp according to any one of claims 1 to 5.

9. A luminaire characterized by, The controller according to claim 7.

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