CN110769545A - LED lamp, and system and method for adjusting brightness of LED lamp - Google Patents

Abstract

The embodiment of the invention provides an LED lamp, an LED lamp brightness adjusting system and a method, wherein the LED lamp comprises: an LED light source module; the power-on detection module is used for sending a power-on signal when the LED lamp is powered on; the counting module is connected with the power-on detection module and used for determining the real-time accumulated power-on times when the power-on signal is received; the PWM output module is connected with the counting module, is internally provided with a corresponding relation table of accumulated power-on times and the duty ratio of the PWM signal, and is used for determining and outputting the PWM signal with the corresponding duty ratio according to the determined real-time accumulated power-on times and the corresponding relation table of the accumulated power-on times and the duty ratio of the PWM signal; and the driving module is internally provided with a corresponding relation table of the duty ratio of the PWM signal and the driving current and is used for determining and outputting the driving current with the preset magnitude to the LED light source module according to the duty ratio of the PWM signal and the corresponding relation table of the duty ratio of the PWM signal and the driving current. The luminance of the effectual regulation LED lamps and lanterns of this embodiment reduces the wiring degree of difficulty, improves luminance regulation efficiency.

Description

LED lamps, LED lamps brightness adjustment system and method

technical field

Embodiments of the present invention relate to the technical field of LED lamp control equipment, and in particular, to an LED lamp, and a system and method for adjusting the brightness of an LED lamp.

Background technique

The brightness adjustment system of the existing LED lamps and landscape lighting with grayscale adjustment currently mainly uses the traditional control system to adjust the grayscale of the lamps, such as serial control or DMX512 signal transmission control, but in specific applications, due to The brightness adjustment system needs to transmit signals with each LED lamp, which leads to complicated signal transmission lines. When a certain LED lamp fails, it is difficult to repair and repair, and when the LED lamps are cascaded one by one, the brightness adjustment signal sent by the brightness adjustment system In the process of transmission, it will gradually attenuate, eventually resulting in low efficiency of brightness adjustment.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present invention is to provide an LED lamp, which can effectively reduce the difficulty of wiring and improve the brightness adjustment efficiency.

A further technical problem to be solved by the embodiments of the present invention is to provide a system for adjusting the brightness of an LED lamp, which can effectively reduce the difficulty of wiring and improve the efficiency of brightness adjustment.

The technical problem to be solved by the embodiments of the present invention is to provide a method for adjusting the brightness of an LED lamp, which can effectively reduce the difficulty of wiring and improve the efficiency of brightness adjustment.

In order to solve the above technical problems, the embodiments of the present invention first provide the following technical solutions: an LED lamp, comprising:

LED light source module;

The power-on detection module is used to send a power-on signal when the LED lamp is powered on;

a counting module, connected with the power-on detection module, for determining the real-time cumulative power-on times when receiving the power-on signal;

The PWM output module is connected to the counting module, and has a built-in corresponding relationship table between the cumulative power-on times and the PWM signal duty cycle, which is used for the real-time cumulative power-on times determined by the counting module and the cumulative power-on times and the PWM The signal duty cycle correspondence table determines and outputs the PWM signal of the corresponding duty cycle;

The drive module is connected to the PWM output module and the LED light source module, and has a built-in PWM signal duty cycle and drive current correspondence table, which is used for the duty cycle of the PWM signal output by the PWM output module and the PWM signal The corresponding relationship table of duty ratio and driving current determines and outputs the driving current of the corresponding predetermined size to the LED light source module.

Further, the counting module includes:

The storage unit is used to pre-store the upper limit of the cumulative power-on times;

an accumulating unit, used for successively accumulating and determining the real-time accumulative power-on times when the power-on signal is received;

A clearing unit, which is respectively connected with the accumulating unit and the storage unit, is used to read the real-time accumulative power-on times in real time and store the real-time accumulative power-on times when the real-time accumulative power-on times increase to the upper limit value. The power-on times are reset to zero.

Further, the counting module also includes a duration detection unit with a built-in predetermined duration, which is used to detect the time difference between each time the power-on signal is received and the last time the power-on signal is received, and when the reception time difference is less than the predetermined duration. Control the accumulating unit to accumulate and determine the real-time accumulative power-on times.

On the other hand, in order to further solve the above technical problems, the embodiments of the present invention provide the following technical solutions: an LED lamp brightness adjustment system, comprising an LED lamp, a power supply device for supplying power to the LED lamp, and a power supply device connected between the LED lamp and the power supply device. The control device for restarting the power supply circuit once every predetermined time interval, and the LED lamp is the LED lamp described in any one of the above.

Further, the control device is a time relay or a time switch.

Further, the system further includes a remote user terminal connected in communication with the control device for sending a brightness adjustment signal to control the working state of the control device correspondingly.

On the other hand, in order to further solve the above technical problems, the embodiments of the present invention provide the following technical solutions: a method for adjusting the brightness of an LED lamp, comprising the following steps:

LED lamps are powered on to generate a power-on signal;

When receiving the power-on signal, determine the real-time cumulative power-on times;

Determine and output the PWM signal of the corresponding duty cycle according to the real-time cumulative power-on times and the cumulative power-on times and the PWM signal duty cycle correspondence table;

According to the duty ratio of the PWM signal and the corresponding relationship table between the duty ratio of the PWM signal and the driving current, determine and output the driving current of the corresponding predetermined size to the LED light source module.

Further, the determining the real-time cumulative power-on times after receiving the power-on signal includes:

Pre-store the upper limit of the cumulative power-on times;

When receiving the power-on signal, successively accumulating to determine the real-time cumulative power-on times;

The real-time cumulative power-on times are read in real time, and the real-time cumulative power-on times are cleared when the real-time cumulative power-on times increase to the upper limit.

Further, the step-by-step determination of the real-time cumulative power-on times when the power-on signal is received specifically refers to detecting the time difference between each time the power-on signal is received and the power-on signal received last time, and then detecting the time difference when the power-on signal is received. When the receiving time difference is less than a predetermined duration, the accumulating unit is controlled to perform accumulation to determine the real-time accumulated power-on times.

After adopting the above technical solution, the embodiment of the present invention has at least the following beneficial effects: the embodiment of the present invention sends a power-on signal when the LED lamp is powered on through the power-on detection module disposed inside the LED lamp, and the counting module receives the power-on signal when the LED lamp is powered on. The power-on signal determines the real-time cumulative power-on times, and the PWM output module determines and outputs the PWM signal with the corresponding duty cycle according to the real-time cumulative power-on times determined by the counting module and the corresponding relationship table between the cumulative power-on times and the PWM signal duty cycle. Finally, the drive module determines and outputs the drive current of the corresponding predetermined size to the LED light source module according to the duty cycle of the PWM signal output by the PWM output module and the correspondence table between the duty cycle of the PWM signal and the drive current, which can effectively adjust the brightness of the LED lamps. , and can effectively reduce the difficulty of wiring and improve the efficiency of brightness adjustment.

Description of drawings

FIG. 1 is a schematic block diagram of an alternative embodiment of an LED lamp of the present invention.

FIG. 2 is a schematic block diagram of a counting module of an optional embodiment of the LED lamp of the present invention.

FIG. 3 is a schematic block diagram of an alternative embodiment of an LED lamp brightness adjustment system according to the present invention.

FIG. 4 is a schematic block diagram of another alternative embodiment of the brightness adjustment system for an LED lamp according to the present invention.

FIG. 5 is a flow chart of steps of an optional embodiment of a method for adjusting the brightness of an LED lamp according to the present invention.

FIG. 6 is a specific flowchart of step S2 of an optional embodiment of the method for adjusting the brightness of an LED lamp according to the present invention.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention, but not to limit the present invention, and, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other .

As shown in FIG. 1, an optional embodiment of the present invention provides an LED lamp 1, including:

LED light source module 10;

The power-on detection module 12 is used to send a power-on signal when the LED lamp 1 is powered on;

The counting module 14, connected with the power-on detection module 12, is used to determine the real-time cumulative power-on times when the power-on signal is received;

The PWM output module 16 is connected with the counting module 14, and has a built-in corresponding relationship table between the cumulative power-on times and the PWM signal duty cycle, and is used for the real-time cumulative power-on times and the cumulative power-on times determined by the counting module 14. The corresponding relationship table between the times and the duty cycle of the PWM signal determines and outputs the PWM signal with the corresponding duty cycle;

The drive module 18 is connected to the PWM output module 16 and the LED light source module 10, and has a built-in PWM signal duty cycle and drive current correspondence table, which is used for the duty cycle of the PWM signal output by the PWM output module 16 and The corresponding relationship table between the duty ratio of the PWM signal and the driving current determines and outputs the driving current of the corresponding predetermined size to the LED light source module 10 .

In the embodiment of the present invention, the power-on detection module 12 disposed inside the LED lamp 1 sends a power-on signal when the LED lamp 1 is powered on, and the counting module 14 determines the real-time cumulative power-on times after receiving the power-on signal, and the PWM The output module 16 determines and outputs the PWM signal of the corresponding duty cycle according to the real-time cumulative power-on times determined by the counting module 14 and the corresponding relationship table of the cumulative power-on times and the PWM signal duty cycle. Finally, the drive module 18 outputs the module 16 according to the PWM signal. The duty cycle of the output PWM signal and the corresponding relationship table between the duty cycle of the PWM signal and the driving current are determined and output the driving current of the corresponding predetermined size to the LED light source module 10, which can effectively adjust the brightness of the LED lamp 1, and can effectively reduce wiring. Difficulty, improve brightness adjustment efficiency.

In an optional embodiment of the present invention, as shown in FIG. 2 , the counting module 14 includes:

The storage unit 141 is used to pre-store the upper limit value of the cumulative power-on times;

The accumulating unit 143 is used to accumulate and determine the real-time cumulative power-on times when the power-on signal is received;

The zero-clearing unit 145 is connected to the accumulating unit 143 and the storage unit 141 respectively, and is used to read the real-time cumulative power-on times in real time and reset all the real-time cumulative power-on times to the upper limit when the real-time cumulative power-on times increase to the upper limit value. The real-time cumulative power-on times are reset to zero. In this embodiment, the clearing unit 145 is also set to clear the real-time cumulative power-on times when the real-time cumulative power-on times increase to the upper limit, so as to prevent the brightness of the LED lamp 1 from changing with the counting module 14 . Unlimited adjustment of real-time cumulative power-on times, the brightness of LED luminaire 1 can be reset when the real-time cumulative power-on times is too large.

In yet another optional embodiment of the present invention, as shown in FIG. 1 , the counting module 14 further includes a duration detection unit 147 with a built-in predetermined duration, for detecting the distance from the last time each time the power-on signal is received The time difference between the power-on signals is received, and when the received time difference is less than a predetermined time period, the accumulating unit 143 is controlled to perform accumulation to determine the real-time accumulated power-on times. In this embodiment, the counting module 14 also has a built-in time length detecting unit 141 to detect the time difference between each time the power-on signal is received and the last time the power-on signal is received, and control the accumulating unit when the receiving time difference is less than a predetermined time length Accumulation is performed to determine the real-time cumulative power-on times, which is more convenient to use, and avoids changes in the brightness of the lamp 1 when the time difference between the two power-on times is long.

On the other hand, as shown in FIG. 3 , in order to further solve the above technical problems, the embodiments of the present invention provide the following technical solutions: an LED lamp brightness adjustment system 3 , comprising an LED lamp 1 , a power supply device 5 for supplying power to the LED lamp 1 , and A control device 7 connected between the LED lighting fixture 1 and the power supply device 5 for restarting the power supply circuit every predetermined time interval, the LED lighting fixture 1 being the LED lighting fixture described in any one of the above.

In the embodiment of the present invention, the control device 7 is set to restart the power supply line between the LED lamp 1 and the power supply device 5 once every predetermined time interval, and the LED lamp 1 will be re-powered once every predetermined time interval, that is, the brightness changes once , which improves the brightness adjustment efficiency of LED lamps, and the wiring is also very simple.

In an optional embodiment of the present invention, the control device 7 is a time relay or a time switch. The control device 7 in this embodiment adopts a time relay or a time switch, and has a simple structure, which does not require manual control, and realizes the automatic adjustment of the brightness of the LED lamp, which is very convenient.

In yet another optional embodiment of the present invention, as shown in FIG. 4 , the system further includes a remote user terminal that is connected in communication with the control device 7 for sending a brightness adjustment signal and correspondingly controls the working state of the control device 7 9. In this embodiment, the working state of the control device 7 is correspondingly controlled by the brightness adjustment signal sent by the remote user terminal 9, so as to realize the repeated power-on of the LED lamp 1, which is very simple, and is convenient to manually obtain the required brightness of the LED lamp 1.

In another aspect, as shown in FIG. 5 , an embodiment of the present invention provides a method for adjusting the brightness of an LED lamp, including the following steps:

S1: LED lamp 1 is powered on to generate a power-on signal;

S2: determine the real-time cumulative power-on times when the power-on signal is received;

S3: determine and output the PWM signal of the corresponding duty cycle according to the real-time cumulative power-on times and the cumulative power-on times and the PWM signal duty cycle correspondence table;

S4 : Determine and output a drive current of a corresponding predetermined size to the LED light source module 10 according to the duty cycle of the PWM signal and the corresponding relationship table between the duty cycle of the PWM signal and the drive current.

In the embodiment of the present invention, through the above method, a power-on signal is sent when the LED lamp 1 is powered on, the real-time cumulative power-on times are determined by receiving the power-on signal, and the real-time cumulative power-on times determined and the cumulative power-on times are determined. The corresponding relationship table between the times and the PWM signal duty cycle determines and outputs the PWM signal with the corresponding duty cycle, and finally determines and outputs according to the duty cycle of the PWM signal output by the PWM output module 16 and the corresponding relationship table between the PWM signal duty cycle and the driving current The driving current corresponding to the predetermined size is supplied to the LED light source module 10, which can effectively adjust the brightness of the LED lamp 1, and can effectively reduce the difficulty of wiring and improve the brightness adjustment efficiency.

In an optional embodiment of the present invention, as shown in FIG. 6 , the step S2 includes:

S21: Pre-store the upper limit of the cumulative power-on times;

S22: Accumulate and determine the real-time cumulative power-on times when the power-on signal is received;

S23: Read the real-time cumulative power-on times in real time, and clear the real-time cumulative power-on times when the real-time cumulative power-on times increase to the upper limit value.

This embodiment uses the above method to clear the real-time cumulative power-on times to zero when the real-time cumulative power-on times increases to the upper limit, preventing the brightness of the LED lamp 1 from being unlimited along with the real-time cumulative power-on times. Adjustment, you can reset the brightness of LED lamp 1 when the cumulative power-on times in real time is too large.

In yet another optional embodiment of the present invention, the step-by-step determination of the cumulative power-on times in real time when the power-on signal is received specifically refers to detecting that each time the power-on signal is received, the distance from the last time the power-on signal is received is detected. The time difference of the power-on signal is controlled, and when the receiving time difference is less than a predetermined duration, the accumulating unit is controlled to perform accumulation to determine the real-time cumulative power-on times. In this embodiment, the time difference between each time the power-on signal is received and the last time the power-on signal is received is detected, and when the receiving time difference is less than a predetermined time period, the accumulating unit is controlled to perform accumulation to determine the cumulative power-on times in real time, which is more convenient to apply. , to prevent the brightness of the lamp 1 from changing when the time difference between the two power-ups is long.

If the functions described in the embodiments of the present invention are implemented in the form of software function modules or units and sold or used as independent products, they may be stored in a readable storage medium of a computing device. Based on this understanding, the part of the embodiments of the present invention that contribute to the prior art or the part of the technical solution may be embodied in the form of a software product, and the software product is stored in a storage medium and includes several instructions to make a A computing device (which may be a personal computer, a server, a mobile computing device or a network device, etc.) executes all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes . The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments may be referred to each other.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the scope of protection of the spirit of the present invention and the claims, many forms can be made, which all fall within the protection scope of the present invention.

Claims (9)

1. An LED luminaire, comprising an LED light source module, wherein the LED luminaire further comprises: The power-on detection module is used to send a power-on signal when the LED lamp is powered on; a counting module, connected with the power-on detection module, for determining the real-time cumulative power-on times when receiving the power-on signal; The PWM output module is connected to the counting module, and has a built-in corresponding relationship table between the cumulative power-on times and the PWM signal duty cycle, which is used for the real-time cumulative power-on times determined by the counting module and the cumulative power-on times and the PWM The signal duty cycle correspondence table determines and outputs the PWM signal of the corresponding duty cycle; The drive module is connected to the PWM output module and the LED light source module, and has a built-in PWM signal duty cycle and drive current correspondence table, which is used for the duty cycle of the PWM signal output by the PWM output module and the PWM signal The corresponding relationship table of duty ratio and driving current determines and outputs the driving current of the corresponding predetermined size to the LED light source module. 2. The LED lamp of claim 1, wherein the counting module comprises: The storage unit is used to pre-store the upper limit of the cumulative power-on times; an accumulating unit, used for successively accumulating and determining the real-time accumulative power-on times when the power-on signal is received; A clearing unit, which is respectively connected with the accumulating unit and the storage unit, is used to read the real-time accumulative power-on times in real time and store the real-time accumulative power-on times when the real-time accumulative power-on times increase to the upper limit value. The power-on times are reset to zero. 3 . The LED lamp according to claim 1 , wherein the counting module further comprises a duration detection unit with a built-in predetermined duration, which is used to detect the distance from the last time the power-on signal is received each time the power-on signal is received. 4 . The time difference of the signal is controlled, and when the receiving time difference is less than a predetermined time period, the accumulating unit is controlled to perform accumulation to determine the real-time accumulated power-on times. 4. A system for adjusting the brightness of an LED lamp, comprising an LED lamp, a power supply device for supplying power to the LED lamp, and a control device connected between the LED lamp and the power supply device for restarting a power supply circuit every predetermined time interval, characterized in that, The LED lamp is the LED lamp according to any one of claims 1-3. 5. The LED lamp brightness adjustment system according to claim 4, wherein the control device is a time relay or a time switch. 6 . The system for adjusting the brightness of LED lamps according to claim 4 , wherein the system further comprises a remote user terminal communicatively connected to the control device for sending a brightness adjustment signal to control the working state of the control device. 7 . 7. A method for adjusting the brightness of an LED lamp, comprising the following steps: LED lamps are powered on to generate a power-on signal; When receiving the power-on signal, determine the real-time cumulative power-on times; Determine and output the PWM signal of the corresponding duty cycle according to the real-time cumulative power-on times and the cumulative power-on times and the PWM signal duty cycle correspondence table; According to the duty ratio of the PWM signal and the corresponding relationship table between the duty ratio of the PWM signal and the driving current, determine and output the driving current of the corresponding predetermined size to the LED light source module. 8 . The method for adjusting the brightness of an LED lamp according to claim 7 , wherein the determining the real-time cumulative power-on times after receiving the power-on signal comprises: 8 . Pre-store the upper limit of the cumulative power-on times; When receiving the power-on signal, successively accumulating to determine the real-time cumulative power-on times; The real-time cumulative power-on times are read in real time, and the real-time cumulative power-on times are cleared when the real-time cumulative power-on times increase to the upper limit. 9 . The method for adjusting the brightness of an LED lamp according to claim 7 , wherein the step of determining the cumulative power-on times in real time by successively accumulating the power-on signal when receiving the power-on signal specifically refers to detecting that each time the power-on signal is received. 10 . The time difference between the signal time and the last time the power-on signal was received, and when the receiving time difference is less than a predetermined time period, the accumulating unit is controlled to accumulate to determine the real-time accumulated power-on times.

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