A dynamic energy-saving system and method for LED display screen

Abstract

This invention relates to the field of display screen energy saving, specifically to a dynamic energy-saving system and method for LED displays, comprising: a dynamic energy-saving power supply for voltage output and voltage feedback sampling; a HUB board, the input of which is electrically connected to the output of the dynamic energy-saving power supply for distributing power; multiple LED display modules, including near-end LED module one and near-end LED module two, far-end LED module N-1 and far-end LED module N, each module being electrically connected to the HUB board and arranged sequentially along the power supply line; and voltage sampling lines, including a positive sampling line S+ and a negative sampling line S-. The power consumption is incorporated into an advanced closed-loop feedback control algorithm, so that the power output is no longer in a constant state but changes with the power load. For example, when the display screen shows a dark image or is in standby mode, the closed-loop feedback control algorithm automatically reduces the output voltage of the LED display screen through the system to avoid energy waste.

Description

Technical Field

[0001] This invention belongs to the field of display screen energy-saving technology, specifically a dynamic energy-saving system and method for LED displays. Background Technology

[0002] LED display is a flat panel display technology that uses light-emitting diodes (LEDs) as its core components. It uses red, green, and blue LED beads arranged in an array as pixels, along with driving circuits and control modules, to display text, images, and video signals. LED displays are mainly composed of a main controller, scanning board, display control unit, and cabinet structure hardware. They are characterized by high brightness, long lifespan, and wide viewing angle, and are widely used in outdoor advertising, stadiums, conferences and exhibitions, stage design, and command and control.

[0003] A patent with publication number CN113129812B discloses an adaptive energy-saving control method and device for LED displays. The method acquires information sent to the display screen by an external device in real time, performs logical calculations on the information according to a predetermined algorithm rule, and outputs dynamic calculation values ​​for the display screen. The operation process of the external device is pre-divided into N task states, and each task state is assigned a unique task status code. The dynamic calculation values ​​of the display screen are bound to the corresponding task status code. The bound task status code is associated with a preset energy consumption level of the display screen. The corresponding energy-saving control command is generated according to the energy consumption level of the display screen, and the input power of the display screen is adjusted.

[0004] In the current technology, existing LED display power supply systems suffer from significant power loss due to maintaining high output voltage under light load conditions. Moreover, the cumulative effect of some large systems can increase operating costs. Furthermore, for some fixed output voltage systems, they cannot adapt to dynamic load changes, and the rigid control method fails to achieve "power supply on demand," thus causing energy waste.

[0005] Therefore, the present invention provides a dynamic energy-saving system and method for LED displays. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] Firstly, the technical solution adopted by the present invention to solve its technical problem is: a dynamic energy-saving system for an LED display screen, comprising: Dynamic energy-saving power supply, used for voltage output and voltage feedback sampling terminals; The HUB board has its input terminal electrically connected to the output terminal of the dynamic energy-saving power supply for distributing electrical energy. Multiple LED display modules, including near-end LED module one and near-end LED module two, far-end LED module N-1 and far-end LED module N, are electrically connected to the HUB board and arranged sequentially along the power supply line; The voltage sampling line includes a positive sampling line S+ and a negative sampling line S-. One end of the sampling line is connected to the vicinity of the power supply input terminal of the farthest LED module, and the other end is connected to the feedback sampling terminal of the dynamic energy-saving power supply. The power supply output lines, including the positive power supply line V+ and the negative power supply line V-, are connected between the dynamic energy-saving power supply and the HUB board, as well as between the HUB board and each of the near-end LED module 1, near-end LED module 2, far-end LED module N-1, and far-end LED module N.

[0008] Preferably, the positive output terminal of the dynamic energy-saving power supply is connected to the power input terminal of the HUB board through the power supply output line V+, and the negative output terminal is connected to the power ground terminal of the HUB board through the power supply output line V-. The HUB board transmits electrical energy sequentially to near-end LED module one, near-end LED module two, far-end LED module N-1, and far-end LED module N through its internal wiring.

[0009] Preferably, one end of the positive sampling line S+ and the negative sampling line S- of the voltage sampling line are connected in parallel to the power supply input terminal of the remote LED module N, and the other end is connected to the feedback sampling input terminal of the dynamic energy-saving power supply, so as to feed back the actual working voltage at the farthest module to the power supply in real time.

[0010] Secondly, a dynamic energy-saving method for LED displays includes the following steps: Includes the following steps: S1. Real-time sampling: When the system is working, the positive voltage sampling line S+ and the negative voltage sampling line S- collect the actual voltage value V_sample at the power supply input terminal of the farthest LED module in real time, and transmit the sampled voltage signal to the error amplifier. S2. Comparative Analysis: The error amplifier has an internal reference voltage source Vref, whose voltage value is set to the minimum operating voltage for the LED module to work normally. The error amplifier compares the received sampled voltage V_sample with the reference voltage Vref to generate an error signal. S3, isolated transmission; the error signal drives the LED side of the optocoupler, and the optocoupler isolates and transmits the error signal on the secondary side to the FB feedback input terminal of the PWM controller on the primary side; S4. Dynamic adjustment: The PWM controller adjusts the duty cycle or frequency of the output PWM waveform according to the error signal at the FB terminal, drives the power switching device to work, and ultimately adjusts the power supply output voltage V_out through energy transfer via the high-frequency transformer. S5, LED screen autonomous cooling adjustment: The LED display screen that has been operating for a long time is automatically cooled through the ventilation and heat dissipation device; S6, LED screen internal light adjustment device, which monitors and compares the light intensity inside and outside the LED screen, and adjusts the brightness of the LED screen accordingly.

[0011] Preferably, step S5 includes the following steps: S51. By establishing an electrical connection between the high-precision temperature sensor integrated on the internal circuit board of the LED display and the ventilation and heat dissipation device of the display, the LED screen can be monitored and processed in real time. S52. During the operation of the LED display screen, the temperature sensor monitors the temperature change of the internal core area in real time. When the temperature exceeds the preset threshold, the ventilation and heat dissipation device is automatically activated to exhaust the hot air inside the LED display screen. At the same time, the high-precision temperature sensor will dynamically adjust the heat dissipation frequency and intensity according to the temperature gradient, so as to realize untimely and on-demand ventilation and heat dissipation, effectively preventing the aging of components or display abnormalities caused by high temperature, and extending the service life of the display screen.

[0012] Preferably, step S6 includes the following steps: S61. By using a high-sensitivity light brightness sensor installed inside the LED screen, the ambient light is monitored and collected in real time to provide data support for subsequent brightness adjustment. S62. By collecting ambient brightness data, the brightness of the LED screen is adjusted and processed. S63. Generate energy-saving control instructions that match the current energy consumption level based on the energy consumption correlation model, and adjust the brightness of the LED screen to maintain the clarity of the LED screen.

[0013] Preferably, step S6 further includes the following step: S61. Install a high-sensitivity light brightness sensor on the outer frame of the LED display screen to collect brightness data of the ambient natural light in real time, and convert the collected analog signal into a digital signal and transmit it to the built-in central processing unit. S62. The central processing unit performs preset processing on the digital signal and calculates the brightness information through logic algorithms. It combines the color complexity, refresh rate and other parameters of the content currently displayed on the screen, and calculates the brightness data collected from the outside. It compares the calculated data of the LED screen with the calculated data of the outside brightness to calculate the dynamic calculated value of the screen that is suitable for the current environment, providing data support for subsequent brightness adjustment.

[0014] Preferably, step S6 further includes the following step: S63. Obtain ambient light brightness information from the central processing unit by reading the data calculated internally by S62, and divide the brightness into N preset levels according to the brightness index using the level division unit. S64. A unique task code is assigned to each brightness level through the task code configuration unit, and then the task binding unit binds the display screen dynamic calculation value generated in S63 with the task code of the corresponding level. S65. The energy consumption association unit establishes a mapping relationship between the bound task code and the preset LED display energy consumption level, forming an association model of "ambient brightness - task code - energy consumption level".

[0015] Preferably, step S65 further includes the following step: S66. The instruction generation unit generates an energy-saving control instruction that matches the current energy consumption level according to the energy consumption correlation model, and the instruction execution unit precisely adjusts the input power of the LED display screen to achieve automatic stepless adjustment of the display brightness.

[0016] Preferably, step S65 further includes the following step: S67. The automatic reduction of power in low-brightness environments at night to save energy, and the increase of power in strong light environments at noon to ensure display clarity, ultimately achieving the goal of "power supply on demand and dynamic energy saving".

[0017] The beneficial effects of this invention are as follows: 1. The dynamic energy-saving system and method for LED displays described in this invention, through real-time monitoring, precisely locks the power supply voltage of the module near the "minimum critical voltage" where it can work normally. This mechanism completely eliminates the "voltage safety margin" deliberately reserved in traditional power supply to prevent voltage drop at the end, thereby eliminating ineffective heat loss caused by excessive voltage. Among many LED displays, this significantly reduces the overall operating cost. 2. The dynamic energy-saving system and method for LED displays described in this invention introduces power consumption into an advanced closed-loop feedback control algorithm, so that the power output is no longer in a constant state, but can change with the power load. For example, when the display shows a dark picture or is in standby mode, the closed-loop feedback control algorithm will automatically reduce the output voltage of the LED display to avoid energy waste; while when the display shows a bright picture or the load increases, the system quickly increases the voltage to ensure sufficient power supply. The system can supply power on demand according to when the LED display uses power, which changes the situation where the power supply provided by the traditional device is the same whether it is in use or in standby mode, resulting in excessive power waste. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a system composition block diagram of the present invention; Figure 2 This is a schematic diagram of the internal feedback control circuit of the dynamic energy-saving power supply in this invention; Figure 3 This is a schematic diagram of the dynamic energy-saving method in this invention.

[0020] In the diagram: 1. Dynamic energy-saving power supply; 2. HUB board; 3. Near-end LED module one; 4. Near-end LED module two; 5. Far-end LED module N-1; 6. Far-end LED module N; 7. Positive sampling line S+; 8. Negative sampling line S-; 9. Positive power supply line V+; 10. Negative power supply line V-; 11. High-frequency transformer; 12. Optocoupler; 13. Error amplifier; 14. Power switching device; 15. PWM pulse width modulation controller. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0022] like Figures 1 to 2 As shown, an embodiment of the present invention provides a dynamic energy-saving system for an LED display screen, comprising: Dynamic energy-saving power supply 1, used for voltage output terminal and voltage feedback sampling terminal; HUB board 2, whose input terminal is electrically connected to the output terminal of dynamic energy-saving power supply 1, is used to distribute electrical energy; Multiple LED display modules, including near-end LED module 1 3 and near-end LED module 2 4, and far-end LED module N-15 and far-end LED module N6, are electrically connected to HUB board 2 and arranged sequentially along the power supply line; The voltage sampling line includes a positive sampling line S+7 and a negative sampling line S-8. One end of the sampling line is connected to the power input terminal of the farthest LED module 6, and the other end is connected to the feedback sampling terminal of the dynamic energy-saving power supply 1. The power supply output lines, including the positive power supply line V+9 and the negative power supply line V-10, are connected between the dynamic energy-saving power supply 1 and the HUB board 2, as well as between the HUB board 2 and each of the near-end LED module 1 3, near-end LED module 2 4, far-end LED module N-15 and far-end LED module N6.

[0023] like Figures 1 to 2As shown, the positive output terminal of the dynamic energy-saving power supply 1 is connected to the power input terminal of the HUB board 2 through the power supply output line V+9, and the negative output terminal is connected to the power ground terminal of the HUB board 2 through the power supply output line V-10; the HUB board 2 transmits electrical energy sequentially to the near-end LED module 3, the near-end LED module 4, the far-end LED module N-15, and the far-end LED module N6 through its internal wiring. One end of the positive sampling line S+7 and the negative sampling line S-8 are connected in parallel to the power input terminal of the remote LED module N6, namely the V+ and V- pads, and the other end is connected to the feedback sampling input terminal of the dynamic energy-saving power supply 1, which is used to feed back the actual working voltage of the farthest module to the power supply in real time. Example

[0024] like Figure 3 As shown, an embodiment of the present invention provides a dynamic energy-saving method for an LED display screen, comprising the following steps: S1. Real-time sampling: When the system is working, the positive voltage sampling line S+7 and the negative voltage sampling line S-8 collect the actual voltage value V_sample at the power supply input terminal of the farthest LED module 6 in real time, and transmit the sampled voltage signal to the error amplifier 13. S2. Comparative Analysis: The error amplifier 13 has an internal reference voltage source Vref, whose voltage value is set to the minimum operating voltage of the LED module for normal operation, for example, 4.2V. The error amplifier compares the received sampled voltage V_sample with the reference voltage Vref to generate an error signal. S3, isolated transmission; the error signal drives the LED side of the optocoupler 12, and the optocoupler 12 isolates and transmits the error signal of the secondary side to the FB feedback input terminal of the PWM controller 15 of the primary side. S4. Dynamic adjustment: The PWM controller 15 adjusts the duty cycle or frequency of the output PWM waveform according to the error signal at the FB terminal, drives the power switching device 14 to work, and ultimately adjusts the power supply output voltage V_out through the energy transfer of the high-frequency transformer 11. S5, LED screen autonomous cooling adjustment: The LED display screen that has been operating for a long time is automatically cooled through the ventilation and heat dissipation device; S5 includes the following steps: S51. By using a high-precision temperature sensor integrated on the internal circuit board of the LED display screen, an electrical connection is established with the display screen's built-in ventilation and heat dissipation device, such as a fan or heat dissipation holes, thereby enabling real-time temperature monitoring of the LED screen. S52. During the operation of the LED display screen, the temperature sensor monitors the temperature change of the internal core area in real time. When the temperature exceeds the preset threshold such as 40℃, the ventilation and heat dissipation device is automatically activated to exhaust the hot air inside the LED display screen. At the same time, the high-precision temperature sensor will dynamically adjust the heat dissipation frequency and intensity according to the temperature gradient to achieve intermittent and on-demand ventilation and heat dissipation, effectively preventing component aging or display abnormalities caused by high temperature and extending the service life of the display screen. S6, LED screen internal light adjustment device, which monitors and compares the light intensity inside and outside the LED screen, and adjusts the brightness of the LED screen accordingly.

[0025] like Figure 3 As shown, S6 includes the following steps: S61. By using a high-sensitivity light brightness sensor installed inside the LED screen, the ambient light is monitored and collected in real time to provide data support for subsequent brightness adjustment. S62. By collecting ambient brightness data, the brightness of the LED screen is adjusted and processed. S63. Generate energy-saving control instructions that match the current energy consumption level based on the energy consumption correlation model, and adjust the brightness of the LED screen to maintain the clarity of the LED screen. S61. Install a high-sensitivity light brightness sensor on the outer frame of the LED display screen to collect the brightness data of the surrounding natural light in real time (unit: lux), and convert the collected analog signal into a digital signal and transmit it to the built-in central processing unit. S62. The central processing unit performs preset processing on the digital signal and calculates the brightness information through logical algorithms such as linear regression. It combines the color complexity, refresh rate and other parameters of the content currently displayed on the screen. At the same time, it calculates the brightness data collected from the outside and compares the calculated data of the LED screen with the calculated data of the outside brightness to calculate the dynamic calculation value of the screen that is suitable for the current environment, providing data support for subsequent brightness adjustment. S63. By reading the data calculated internally by S62, ambient light brightness information is obtained from the central processing unit. The brightness is divided into N preset levels according to the brightness index, such as 0-1000 lux as level 1, 1000-5000 lux as level 2, and so on. S64. The task code configuration unit assigns a unique task code to each brightness level, such as "Task Code A" for low brightness environment, "Task Code B" for medium brightness environment, and "Task Code C" for high brightness environment. Then, the task binding unit binds the display screen dynamic calculation value generated in S63 with the task code of the corresponding level. S65. The bound task code is mapped to the preset LED display energy consumption level, such as low energy consumption, medium energy consumption, and high energy consumption, through the energy consumption association unit, forming an association model of "ambient brightness - task code - energy consumption level". S66. The instruction generation unit generates energy-saving control instructions that match the current energy consumption level, such as "reduce input power by 20%" or "increase brightness to level 1, level 2 to the highest level", based on the energy consumption correlation model. The instruction execution unit then precisely adjusts the input power of the LED display screen to achieve automatic stepless adjustment of the display brightness. S67 automatically reduces power in low-brightness environments at night to save energy, and increases power in strong light environments at noon to ensure display clarity, ultimately achieving the goal of "power supply on demand and dynamic energy saving".

[0026] Working principle: By incorporating power consumption into an advanced closed-loop feedback control algorithm, the power output is no longer constant but varies with the power load. For example, when the display shows a dark image or is in standby mode, the closed-loop feedback control algorithm automatically reduces the output voltage of the LED display to avoid energy waste. When the display shows a bright image or the load increases, the system quickly increases the voltage to ensure sufficient power supply. The system can supply power on demand based on the LED display's power consumption, changing the situation where traditional devices provide the same power regardless of whether they are in use or in standby mode, resulting in excessive power waste.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dynamic energy-saving system for an LED display screen, characterized in that: include: Dynamic energy-saving power supply (1) is used for voltage output terminal and voltage feedback sampling terminal; HUB board (2), whose input terminal is electrically connected to the output terminal of the dynamic energy-saving power supply (1), is used to distribute electrical energy; Multiple LED display modules, including near-end LED module one (3) and near-end LED module two (4) and far-end LED module N-1 (5) and far-end LED module N (6), are electrically connected to the HUB board (2) and arranged in sequence along the power supply line; The voltage sampling line includes a positive sampling line S+ (7) and a negative sampling line S- (8). One end of the sampling line is connected to the power input terminal of the farthest LED module (6), and the other end is connected to the feedback sampling terminal of the dynamic energy-saving power supply (1). The power supply output line, including the positive power supply line V+ (9) and the negative power supply line V- (10), is connected between the dynamic energy-saving power supply (1) and the HUB board (2), and between the HUB board (2) and each near-end LED module 1 (3), near-end LED module 2 (4), far-end LED module N-1 (5) and far-end LED module N (6).

2. The dynamic energy-saving system for an LED display screen according to claim 1, characterized in that: The positive output terminal of the dynamic energy-saving power supply (1) is connected to the power input terminal of the HUB board (2) through the power supply output line V+ (9), and the negative output terminal is connected to the power ground terminal of the HUB board (2) through the power supply output line V- (10). The HUB board (2) transmits electrical energy sequentially to the near-end LED module one (3), the near-end LED module two (4), the far-end LED module N-1 (5), and the far-end LED module N (6) through its internal wiring.

3. The dynamic energy-saving system for an LED display screen according to claim 1, characterized in that: One end of the positive sampling line S+ (7) and the negative sampling line S- (8) of the voltage sampling line are connected in parallel to the power supply input terminal (i.e., V+ and V- pads) of the far-end LED module N (6), and the other end is connected to the feedback sampling input terminal of the dynamic energy-saving power supply (1) to feed back the actual working voltage at the farthest module to the power supply in real time.

4. A dynamic energy-saving method for an LED display screen, characterized in that; Includes the following steps: S1. Real-time sampling: When the system is working, the positive voltage sampling line S+ (7) and the negative voltage sampling line S- (8) collect the actual voltage value V_sample at the power supply input terminal of the farthest LED module (6) in real time, and transmit the sampled voltage signal to the error amplifier (13). S2. Comparative analysis; The error amplifier (13) has a reference voltage source Vref inside, whose voltage value is set to the minimum working voltage of the LED module (e.g., 4.2V) for normal operation; The error amplifier compares the received sample voltage V_sample with the reference voltage Vref to generate an error signal; S3, isolated transmission; drive the LED side of the optocoupler (12) with the error signal, and the optocoupler (12) transmits the error signal of the secondary side to the FB feedback input terminal of the PWM controller (15) of the primary side in an isolated manner; S4. Dynamic adjustment; The PWM controller (15) adjusts the duty cycle or frequency of the output PWM waveform according to the error signal at the FB terminal, drives the power switching device (14) to work, and finally adjusts the power supply output voltage V_out through the energy transfer of the high frequency transformer (11); S5, LED screen autonomous cooling adjustment: The LED display screen that has been operating for a long time is automatically cooled through the ventilation and heat dissipation device; S6, LED screen internal light adjustment device, which monitors and compares the light intensity inside and outside the LED screen, and adjusts the brightness of the LED screen accordingly.

5. The dynamic energy-saving method for an LED display screen according to claim 4, characterized in that: S5 includes the following steps: S51. By establishing an electrical connection between the high-precision temperature sensor integrated on the internal circuit board of the LED display screen and the ventilation and heat dissipation device (such as a fan or heat dissipation holes) of the display screen, the LED screen can be monitored and processed in real time. S52. During the operation of the LED display screen, the temperature sensor monitors the temperature change of the internal core area in real time. When the temperature exceeds the preset threshold (such as 40℃), the ventilation and heat dissipation device is automatically activated to exhaust the hot air inside the LED display screen. At the same time, the high-precision temperature sensor will dynamically adjust the heat dissipation frequency and intensity according to the temperature gradient to achieve intermittent and on-demand ventilation and heat dissipation, effectively preventing component aging or display abnormalities caused by high temperature and extending the service life of the display screen.

6. The dynamic energy-saving method for an LED display screen according to claim 4, characterized in that; S6 includes the following steps: S61. By using a high-sensitivity light brightness sensor installed inside the LED screen, the ambient light is monitored and collected in real time to provide data support for subsequent brightness adjustment. S62. By collecting ambient brightness data, the brightness of the LED screen is adjusted and processed. S63. Generate energy-saving control instructions that match the current energy consumption level based on the energy consumption correlation model, and adjust the brightness of the LED screen to maintain the clarity of the LED screen.

7. The dynamic energy-saving method for an LED display screen according to claim 4, characterized in that: S6 further includes the following steps: S61. Install a high-sensitivity light brightness sensor on the outer frame of the LED display screen to collect brightness data (unit: lux) of the ambient natural light in real time, and convert the collected analog signal into a digital signal and transmit it to the built-in central processing unit. S62. The central processing unit performs preset processing on the digital signal and calculates the brightness information through logical algorithms (such as linear regression). It combines the color complexity, refresh rate and other parameters of the content currently displayed on the screen, and calculates the brightness data collected from the outside. It compares the calculated data of the LED screen with the calculated data of the external brightness to calculate the dynamic calculated value of the screen that is suitable for the current environment, providing data support for subsequent brightness adjustment.

8. The dynamic energy-saving method for an LED display screen according to claim 4, characterized in that: S6 further includes the following steps: S63. Obtain ambient light brightness information from the central processing unit by reading the data calculated internally by S62, and divide the brightness into N preset levels according to the brightness index (e.g., 0-1000 lux is level 1, 1000-5000 lux is level 2, and so on) using the level division unit. S64. Assign a unique task code to each brightness level through the task code configuration unit (e.g., "Task Code A" corresponds to a low brightness environment, "Task Code B" corresponds to a medium brightness environment, and "Task Code C" corresponds to a high brightness environment), and then bind the display screen dynamic calculation value generated in S63 to the corresponding level task code through the task binding unit. S65. The energy consumption association unit establishes a mapping relationship between the bound task code and the preset energy consumption level of the LED display screen (such as low energy consumption, medium energy consumption, and high energy consumption) to form an association model of "ambient brightness - task code - energy consumption level".

9. A dynamic energy-saving method for an LED display screen according to claim 8, characterized in that: S65 further includes the following steps: S66. The instruction generation unit generates energy-saving control instructions (such as "reduce input power by 20%" or "increase brightness to level 1, level 2 to the highest level") that match the current energy consumption level according to the energy consumption correlation model, and the instruction execution unit precisely adjusts the input power of the LED display screen to achieve automatic stepless adjustment of the display brightness.

10. A dynamic energy-saving method for an LED display screen according to claim 8, characterized in that: S65 further includes the following steps: S67. The automatic reduction of power in low-brightness environments at night to save energy consumption, and the increase of power in strong light environments at noon to ensure display clarity, ultimately achieving the goal of "power supply on demand and dynamic energy saving".

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